技术领域technical field
本发明涉及混合动力汽车技术领域，尤其是涉及一种电池包加热方法、装置及系统。The invention relates to the technical field of hybrid electric vehicles, in particular to a battery pack heating method, device and system.
背景技术Background technique
中国法规对乘用车的油耗要求越来越严格，国内主机厂现有技术水平与四阶段目标仍存在较大的油耗差距；各大汽车厂商都在探寻合适有效的技术路，48V系统作为一种低投入、高回报的技术解决方案，目前正被越来越多的主机厂所接受及采用。48V轻混系统相对传统车，由于引入了BSG(Belt Driven Starter Generator，皮带式启动发电机)电机、48V动力电池包、直流转换器(DCDC)，实现了驾驶模式多样化，具备BSG电机启停、动态助力、制动能量回收、滑行能量回收多种驾驶功能。Chinese laws and regulations are becoming more and more strict on the fuel consumption of passenger cars. There is still a big gap between the current technical level of domestic OEMs and the goals of the fourth stage; all major automakers are looking for suitable and effective technical solutions. 48V system as a A low-input, high-return technical solution is currently being accepted and adopted by more and more OEMs. Compared with traditional vehicles, the 48V light hybrid system has introduced BSG (Belt Driven Starter Generator, belt-type starter generator) motor, 48V power battery pack, and DC converter (DCDC), which has realized diversified driving modes and has the ability to start and stop the BSG motor. , dynamic power assist, braking energy recovery, taxiing energy recovery and various driving functions.
48V动力电池包作为48V BSG轻混系统中的核心储能零部件，为48V BSG系统提供稳定的能量来源。在低温使用环境下，48V动力电池包由于自身温度较低，电池包内部活性物质活性明显下降，内阻和极化内阻增加，充放电功率和容量均会显著下降，甚至会引起电池容量不可逆衰减，并埋下安全隐患。传统电池的加热方式有电加热膜加热，PTC(PositiveTemperature Coefficient，正温度系数热敏电阻)加热和液热。这些方式虽然热效率较高，但存在结构复杂，成本高，拆装不便、维护困难等问题；由于48V动力电池包，加热要求没有高功率的强混和纯电动系统的电池要求高，成本控制比较严格，因此现有的加热方法不能满足整车48V BSG轻混系统启动及助力的使用需求。As the core energy storage component in the 48V BSG mild hybrid system, the 48V power battery pack provides a stable energy source for the 48V BSG system. In a low-temperature environment, due to the low temperature of the 48V power battery pack, the activity of the active material inside the battery pack will decrease significantly, the internal resistance and polarization internal resistance will increase, the charge and discharge power and capacity will decrease significantly, and even the battery capacity will be irreversible. Attenuation, and buried security risks. Traditional battery heating methods include electric heating film heating, PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor) heating and liquid heating. Although these methods have high thermal efficiency, they have problems such as complex structure, high cost, inconvenient disassembly and assembly, and difficult maintenance; due to the 48V power battery pack, the heating requirements are not as high as those of high-power strong hybrid and pure electric systems, and the cost control is relatively strict. , so the existing heating method cannot meet the needs of starting and assisting the 48V BSG mild hybrid system of the whole vehicle.
发明内容Contents of the invention
有鉴于此，本发明的目的在于提供一种电池包加热方法、装置及系统，以通过在电池包和蓄电池进行充放电的过程中实现对电池包的加热，简单易行，成本低，能够满足整车48V BSG轻混系统启动及助力的使用需求。In view of this, the object of the present invention is to provide a battery pack heating method, device and system to realize the heating of the battery pack during the charging and discharging process of the battery pack and storage battery, which is simple, easy to implement, low in cost, and can meet The vehicle 48V BSG mild hybrid system needs to start and assist.
第一方面，本发明实施例提供了一种电池包加热方法，应用于电子控制单元ECU，包括：In the first aspect, an embodiment of the present invention provides a method for heating a battery pack, which is applied to an electronic control unit ECU, including:
当检测到车辆上电后，获取当前时间电池包的温度值；When it is detected that the vehicle is powered on, obtain the temperature value of the battery pack at the current time;
当所述温度值小于低温阈值时，获取所述电池包的剩余电量SOC和蓄电池的SOC；When the temperature value is less than the low temperature threshold, obtain the remaining power SOC of the battery pack and the SOC of the storage battery;
根据所述电池包的SOC和所述蓄电池的SOC，切换双向直流转换器的导通模式，以控制所述电池包和所述蓄电池之间的充放电过程。According to the SOC of the battery pack and the SOC of the storage battery, the conduction mode of the bidirectional DC converter is switched to control the charging and discharging process between the battery pack and the storage battery.
结合第一方面，本发明实施例提供了第一方面的第一种可能的实施方式，其中，所述根据所述电池包的SOC和所述蓄电池的SOC，切换双向直流转换器的导通模式包括：In combination with the first aspect, the embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein, switching the conduction mode of the bidirectional DC converter according to the SOC of the battery pack and the SOC of the storage battery include:
判断是否满足充放电加热条件，其中所述充放电加热条件为：所述电池包的SOC大于第一高压阈值，且所述蓄电池的SOC大于第一低压阈值；Judging whether the charging and discharging heating condition is satisfied, wherein the charging and discharging heating condition is: the SOC of the battery pack is greater than the first high voltage threshold, and the SOC of the battery is greater than the first low voltage threshold;
如果是，则根据所述电池包的SOC和所述蓄电池的SOC，切换双向直流转换器的导通模式。If so, switch the conduction mode of the bidirectional DC converter according to the SOC of the battery pack and the SOC of the storage battery.
结合第一方面的第一种可能的实施方式，本发明实施例提供了第一方面的第二种可能的实施方式，其中，所述根据所述电池包的SOC和所述蓄电池的SOC，切换双向直流转换器的导通模式包括：With reference to the first possible implementation manner of the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein, according to the SOC of the battery pack and the SOC of the storage battery, switching The conduction modes of the bidirectional DC-to-DC converter include:
当所述电池包的SOC大于等于第二高压阈值时，控制所述双向直流转换器的首次导通的导通模式为降压模式，以使所述电池包向所述蓄电池放电；When the SOC of the battery pack is greater than or equal to the second high-voltage threshold, the conduction mode of controlling the first conduction of the bidirectional DC converter is a step-down mode, so that the battery pack discharges to the storage battery;
当所述电池包的SOC大于等于第一高压阈值且小于第二高压阈值时，控制所述双向直流转换器的首次导通的导通模式为升压模式，以使所述蓄电池为所述电池包充电；When the SOC of the battery pack is greater than or equal to the first high-voltage threshold and less than the second high-voltage threshold, the conduction mode of controlling the initial conduction of the bidirectional DC converter is a boost mode, so that the battery is the battery pack charging;
其中，所述第二高压阈值大于所述第一高压阈值，所述电池包的额定电压大于所述蓄电池的额定电压。Wherein, the second high voltage threshold is greater than the first high voltage threshold, and the rated voltage of the battery pack is greater than the rated voltage of the storage battery.
结合第一方面的第二种可能的实施方式，本发明实施例提供了第一方面的第三种可能的实施方式，其中，所述控制所述双向直流转换器的首次导通的导通模式为降压模式之后，还包括：With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the conduction mode of controlling the initial conduction of the bidirectional DC converter After buck mode, also include:
步骤a1，当检测到所述电池包的SOC小于等于升压切换阈值时，或者当所述蓄电池的SOC大于等于第二低压阈值时，停止所述降压模式，控制所述双向直流转换器的导通模式为升压模式，以使所述蓄电池为所述电池包充电；Step a1, when it is detected that the SOC of the battery pack is less than or equal to the boost switching threshold, or when the SOC of the battery is greater than or equal to the second low voltage threshold, stop the step-down mode, and control the bidirectional DC converter The conduction mode is a boost mode, so that the storage battery charges the battery pack;
步骤a2，当检测到所述电池包的SOC大于等于所述第二高压阈值时，或者当所述蓄电池的SOC小于等于降压切换阈值时，停止所述升压模式，控制所述双向直流转换器的导通模式为降压模式，以使所述电池包向所述蓄电池放电；Step a2, when it is detected that the SOC of the battery pack is greater than or equal to the second high voltage threshold, or when the SOC of the battery is less than or equal to the step-down switching threshold, stop the boost mode and control the bidirectional DC conversion The conduction mode of the converter is a step-down mode, so that the battery pack discharges to the storage battery;
重复所述步骤a1和a2，直至当所述温度值大于等于所述低温阈值时，或者当不再满足所述充放电加热条件时，控制所述双向直流转换器处于截止状态，以停止所述电池包和所述蓄电池之间的充放电过程；Repeating the steps a1 and a2 until when the temperature value is greater than or equal to the low temperature threshold, or when the charging and discharging heating conditions are no longer satisfied, the bidirectional DC converter is controlled to be in a cut-off state, so as to stop the The charging and discharging process between the battery pack and the storage battery;
其中，所述第二低压阈值大于所述第一低压阈值；所述升压切换阈值大于所述第一高压阈值且小于所述第二高压阈值，所述降压切换阈值大于所述第一低压阈值且小于所述第二低压阈值。Wherein, the second low voltage threshold is greater than the first low voltage threshold; the boost switching threshold is greater than the first high voltage threshold and smaller than the second high voltage threshold, and the buck switching threshold is greater than the first low voltage threshold threshold and less than the second low pressure threshold.
结合第一方面的第二种可能的实施方式，本发明实施例提供了第一方面的第四种可能的实施方式，其中，所述控制所述双向直流转换器的首次导通的导通模式为升压模式之后，还包括：With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the conduction mode of controlling the initial conduction of the bidirectional DC converter After boost mode, also include:
步骤b1，当检测到所述电池包的SOC大于等于所述第二高压阈值时，或者当所述蓄电池的SOC小于等于降压切换阈值时，停止所述升压模式，控制所述双向直流转换器的导通模式为降压模式，以使所述电池包向所述蓄电池放电；Step b1, when it is detected that the SOC of the battery pack is greater than or equal to the second high-voltage threshold, or when the SOC of the battery is less than or equal to the step-down switching threshold, stop the boost mode and control the bidirectional DC conversion The conduction mode of the converter is a step-down mode, so that the battery pack discharges to the storage battery;
步骤b2，当检测到所述电池包的SOC小于等于升压切换阈值时，或者当所述蓄电池的SOC大于等于第二低压阈值时，停止所述降压模式，控制所述双向直流转换器的导通模式为升压模式，以使所述蓄电池为所述电池包充电；Step b2, when it is detected that the SOC of the battery pack is less than or equal to the boost switching threshold, or when the SOC of the storage battery is greater than or equal to the second low voltage threshold, stop the step-down mode, and control the bidirectional DC converter The conduction mode is a boost mode, so that the storage battery charges the battery pack;
重复所述步骤b1和b2，直至当所述温度值大于等于所述低温阈值时，或者当不再满足所述充放电加热条件时，控制所述双向直流转换器处于截止状态，以停止所述电池包和所述蓄电池之间的充放电过程；Repeating the steps b1 and b2 until when the temperature value is greater than or equal to the low temperature threshold, or when the charging and discharging heating conditions are no longer satisfied, the bidirectional DC converter is controlled to be in a cut-off state, so as to stop the The charging and discharging process between the battery pack and the storage battery;
其中，所述第二低压阈值大于所述第一低压阈值；所述升压切换阈值大于所述第一高压阈值且小于所述第二高压阈值，所述降压切换阈值大于所述第一低压阈值且小于所述第二低压阈值。Wherein, the second low voltage threshold is greater than the first low voltage threshold; the boost switching threshold is greater than the first high voltage threshold and smaller than the second high voltage threshold, and the buck switching threshold is greater than the first low voltage threshold threshold and less than the second low pressure threshold.
第二方面，本发明实施例还提供一种电池包加热装置，应用于电子控制单元ECU，包括：In the second aspect, the embodiment of the present invention also provides a battery pack heating device, which is applied to an electronic control unit ECU, including:
温度获取模块，用于当检测到车辆上电后，获取当前时间电池包的温度值；The temperature acquisition module is used to acquire the temperature value of the battery pack at the current time when the vehicle is detected to be powered on;
SOC获取模块，用于当所述温度值小于低温阈值时，获取所述电池包的剩余电量SOC和蓄电池的SOC；An SOC acquisition module, configured to acquire the remaining power SOC of the battery pack and the SOC of the storage battery when the temperature value is less than the low temperature threshold;
模式切换模块，用于根据所述电池包的SOC和所述蓄电池的SOC，切换双向直流转换器的导通模式，以控制所述电池包和所述蓄电池之间的充放电过程。The mode switching module is used to switch the conduction mode of the bidirectional DC converter according to the SOC of the battery pack and the SOC of the storage battery, so as to control the charging and discharging process between the battery pack and the storage battery.
结合第二方面，本发明实施例提供了第二方面的第一种可能的实施方式，其中，所述模式切换模块还用于：With reference to the second aspect, the embodiment of the present invention provides a first possible implementation manner of the second aspect, wherein the mode switching module is further used for:
判断是否满足充放电加热条件，其中所述充放电加热条件为：所述电池包的SOC大于第一高压阈值，且所述蓄电池的SOC大于第一低压阈值；Judging whether the charging and discharging heating condition is satisfied, wherein the charging and discharging heating condition is: the SOC of the battery pack is greater than the first high voltage threshold, and the SOC of the battery is greater than the first low voltage threshold;
如果是，则根据所述电池包的SOC和所述蓄电池的SOC，切换双向直流转换器的导通模式。If so, switch the conduction mode of the bidirectional DC converter according to the SOC of the battery pack and the SOC of the storage battery.
结合第二方面的第一种可能的实施方式，本发明实施例提供了第二方面的第二种可能的实施方式，其中，所述模式切换模块还用于：With reference to the first possible implementation manner of the second aspect, the embodiment of the present invention provides a second possible implementation manner of the second aspect, wherein the mode switching module is further configured to:
当所述电池包的SOC大于等于第二高压阈值时，控制所述双向直流转换器的首次导通的导通模式为降压模式，以使所述电池包向所述蓄电池放电；When the SOC of the battery pack is greater than or equal to the second high-voltage threshold, the conduction mode of controlling the first conduction of the bidirectional DC converter is a step-down mode, so that the battery pack discharges to the storage battery;
当所述电池包的SOC大于等于第一高压阈值且小于第二高压阈值时，控制所述双向直流转换器的首次导通的导通模式为升压模式，以使所述蓄电池为所述电池包充电；When the SOC of the battery pack is greater than or equal to the first high-voltage threshold and less than the second high-voltage threshold, the conduction mode of controlling the initial conduction of the bidirectional DC converter is a boost mode, so that the battery is the battery pack charging;
其中，所述第二高压阈值大于所述第一高压阈值，所述电池包的额定电压大于所述蓄电池的额定电压。Wherein, the second high voltage threshold is greater than the first high voltage threshold, and the rated voltage of the battery pack is greater than the rated voltage of the storage battery.
第三方面，本发明实施例还提供一种电池包加热系统，包括电池包、蓄电池、双向直流转换器及ECU，所述蓄电池连接有智能电池传感器IBS，所述IBS用于采集所述蓄电池的SOC；所述ECU包括如第二方面及其任一种可能的实施方式所述的电池包加热装置；In the third aspect, the embodiment of the present invention also provides a battery pack heating system, including a battery pack, a battery, a bidirectional DC converter, and an ECU. The battery is connected to an intelligent battery sensor IBS, and the IBS is used to collect the SOC; the ECU includes the battery pack heating device as described in the second aspect and any possible implementation thereof;
所述IBS、所述电池包、所述双向直流转换器分别与所述ECU连接，所述电池包与所述蓄电池通过所述双向直流转换器连接。The IBS, the battery pack, and the bidirectional DC converter are respectively connected to the ECU, and the battery pack is connected to the storage battery through the bidirectional DC converter.
结合第三方面，本发明实施例提供了第三方面的第一种可能的实施方式，其中，还包括BSG电机、起动机及负载，所述起动机及负载均与所述双向直流转换器连接，所述BSG电机分别与所述电池包、所述双向直流转换器及所述ECU连接。In combination with the third aspect, the embodiment of the present invention provides a first possible implementation manner of the third aspect, which further includes a BSG motor, a starter and a load, and the starter and the load are both connected to the bidirectional DC converter , the BSG motor is respectively connected to the battery pack, the bidirectional DC converter and the ECU.
本发明实施例带来了以下有益效果：Embodiments of the present invention bring the following beneficial effects:
本发明实施例提供的电池包加热方法，应用于混合动力汽车的电子控制单元ECU，包括：当检测到车辆上电后，获取当前时间电池包的温度值；当该温度值小于低温阈值时，获取电池包的剩余电量SOC和蓄电池的SOC；根据电池包的SOC和所述蓄电池的SOC，切换双向直流转换器的导通模式，以控制电池包和蓄电池之间的充放电过程。在本发明实施例中，通过控制双向直流转换器进行导通模式的切换，控制电池包和蓄电池之间进行充放电的过程，从而对电池包进行加热，提高电池包内部的温度；无需增加加热部件，仅利用现有的充放电结构即可实现，简单易行，成本低，能够满足整车48V BSG轻混系统启动及助力的使用需求。The battery pack heating method provided by the embodiment of the present invention is applied to the electronic control unit ECU of a hybrid electric vehicle, including: when it is detected that the vehicle is powered on, acquiring the temperature value of the battery pack at the current time; when the temperature value is less than the low temperature threshold, Obtain the SOC of the remaining power of the battery pack and the SOC of the storage battery; switch the conduction mode of the bidirectional DC converter according to the SOC of the battery pack and the SOC of the storage battery, so as to control the charging and discharging process between the battery pack and the storage battery. In the embodiment of the present invention, by controlling the bidirectional DC converter to switch the conduction mode, the process of charging and discharging between the battery pack and the storage battery is controlled, thereby heating the battery pack and increasing the temperature inside the battery pack; no need to increase heating The components can be realized only by using the existing charging and discharging structure, which is simple and easy to implement and low in cost, and can meet the needs of starting and assisting the 48V BSG light hybrid system of the whole vehicle.
本发明的其他特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
为使本发明的上述目的、特征和优点能更明显易懂，下文特举较佳实施例，并配合所附附图，作详细说明如下。In order to make the above-mentioned objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.
附图说明Description of drawings
为了更清楚地说明本发明具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.
图1为本发明实施例提供的一种电池包加热方法的流程示意图；Fig. 1 is a schematic flow chart of a battery pack heating method provided by an embodiment of the present invention;
图2为本发明实施例提供的进入加热模式的流程示意图；Fig. 2 is a schematic flow chart of entering the heating mode provided by the embodiment of the present invention;
图3为本发明实施例提供的另一种电池包加热方法的流程示意图；Fig. 3 is a schematic flowchart of another battery pack heating method provided by an embodiment of the present invention;
图4为本发明实施例提供的一种电池包加热装置的结构示意图；Fig. 4 is a schematic structural diagram of a battery pack heating device provided by an embodiment of the present invention;
图5为本发明实施例提供的一种电池包加热系统的结构示意图；Fig. 5 is a schematic structural diagram of a battery pack heating system provided by an embodiment of the present invention;
图6为本发明实施例提供的另一种电池包加热系统的结构示意图。FIG. 6 is a schematic structural diagram of another battery pack heating system provided by an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
目前在低温使用环境下，48V动力电池包由于自身温度较低，电池包内部活性物质活性明显下降，内阻和极化内阻增加，充放电功率和容量均会显著下降，充放电能力差，而现有的技术方案由于结构复杂、成本较高，不能满足整车48V BSG电机启动及助力的使用需求。基于此，本发明实施例提供的一种电池包加热方法、装置及系统，可以通过在电池包和蓄电池进行充放电的过程中实现对电池包的加热；无需增加加热部件，仅利用现有的充放电结构即可实现，简单易行，成本低，能够满足整车48V BSG轻混系统启动及助力的使用需求。At present, in the low temperature environment, due to the low temperature of the 48V power battery pack, the activity of the active material inside the battery pack will decrease significantly, the internal resistance and polarization internal resistance will increase, the charge and discharge power and capacity will decrease significantly, and the charge and discharge capacity will be poor. However, due to the complex structure and high cost, the existing technical solutions cannot meet the needs of starting and assisting the 48V BSG motor of the whole vehicle. Based on this, the battery pack heating method, device and system provided by the embodiments of the present invention can realize the heating of the battery pack during the charging and discharging process of the battery pack and the storage battery; without adding heating components, only the existing The charging and discharging structure can be realized, simple and easy to implement, and low in cost, and can meet the needs of starting and assisting the 48V BSG light hybrid system of the whole vehicle.
本发明提供的技术可以但不限于应用于混合动力汽车的低温上电过程中，用于实现对电池包的加热，通过相关的硬件或者软件实现。为便于对本实施例进行理解，首先对本发明实施例所公开的一种电池包加热方法进行详细介绍。The technology provided by the present invention can be applied to, but not limited to, the low-temperature power-on process of the hybrid electric vehicle, and is used to realize the heating of the battery pack through relevant hardware or software. In order to facilitate the understanding of this embodiment, a method for heating a battery pack disclosed in this embodiment of the present invention is firstly introduced in detail.
图1示出了本发明实施例提供的一种电池包加热方法的流程示意图。如图1所示，该电池包加热方法应用于电子控制单元ECU，包括：Fig. 1 shows a schematic flowchart of a method for heating a battery pack provided by an embodiment of the present invention. As shown in Figure 1, the battery pack heating method is applied to the electronic control unit ECU, including:
步骤S101，当检测到车辆上电后，获取当前时间电池包的温度值。Step S101, when it is detected that the vehicle is powered on, the temperature value of the battery pack at the current time is obtained.
在可能的实施例中，该电池包至少包括电池管理系统BMS，通过BMS发送电池包的温度值和剩余电量SOC(State of Charge)。具体地，该电池包的额定电压可以但不限于为48V。In a possible embodiment, the battery pack includes at least a battery management system BMS, and the temperature value and remaining power SOC (State of Charge) of the battery pack are sent through the BMS. Specifically, the rated voltage of the battery pack may be, but not limited to, 48V.
步骤S102，当上述温度值小于低温阈值时，获取电池包的剩余电量SOC和蓄电池的SOC。Step S102, when the above temperature value is lower than the low temperature threshold, obtain the SOC of the remaining power of the battery pack and the SOC of the storage battery.
当ECU检测到该温度值小于低温阈值时，确定当前的温度值不便于进行发动机启动，此时需要进行电池包加热。进一步地，需要获取电池包的剩余电量SOC和蓄电池的SOC。其中该蓄电池连接有智能电池传感器IBS，该IBS可以将蓄电池的SOC、电压及温度发送至ECU。在可能的实施例中，上述低温阈值可以但不限于-15℃，蓄电池的额定电压可以但不限于12V。When the ECU detects that the temperature value is lower than the low temperature threshold, it determines that the current temperature value is not convenient for starting the engine, and the battery pack needs to be heated at this time. Further, it is necessary to obtain the remaining power SOC of the battery pack and the SOC of the storage battery. The battery is connected with an intelligent battery sensor IBS, which can send the SOC, voltage and temperature of the battery to the ECU. In a possible embodiment, the above low temperature threshold may be but not limited to -15°C, and the rated voltage of the storage battery may be but not limited to 12V.
步骤S103，根据电池包的SOC和蓄电池的SOC，切换双向直流转换器的导通模式，以控制电池包和蓄电池之间的充放电过程。Step S103, according to the SOC of the battery pack and the SOC of the storage battery, switch the conduction mode of the bidirectional DC converter to control the charging and discharging process between the battery pack and the storage battery.
其中双向直流转换器的导通模式包括降压模式和升压模式，该降压模式表示电流从电池包流向蓄电池，即由电池包向蓄电池放电；该升压模式表示电流从蓄电池流向电池包，即由蓄电池对电池包充电。The conduction mode of the bidirectional DC converter includes buck mode and boost mode. The buck mode means that the current flows from the battery pack to the battery, that is, the battery pack discharges to the battery. The boost mode means that the current flows from the battery pack to the battery pack. That is, the battery pack is charged by the battery.
在可能的实施例中，上述步骤S103包括：判断是否满足充放电加热条件，其中充放电加热条件为：电池包的SOC大于第一高压阈值，且蓄电池的SOC大于第一低压阈值；如果是，则根据电池包的SOC和蓄电池的SOC，切换双向直流转换器的导通模式。In a possible embodiment, the above step S103 includes: judging whether the charging and discharging heating condition is satisfied, wherein the charging and discharging heating condition is: the SOC of the battery pack is greater than the first high voltage threshold, and the SOC of the battery is greater than the first low voltage threshold; if yes, Then, the conduction mode of the bidirectional DC converter is switched according to the SOC of the battery pack and the SOC of the storage battery.
具体地，根据电池包和蓄电池的最优充放电工作区间确定上述电池包对应的第一高压阈值和蓄电池对应的第一低压阈值。在可能的实施例中，该第一高压阈值可以但不限于为30％，第一低压阈值分别为30％。即在温度值小于低温阈值的情况下，如果满足上述第一高压阈值和第一低压阈值的要求，即可以进行蓄电池与电池包之间的充放电过程，以开启加热模式。Specifically, the first high voltage threshold corresponding to the battery pack and the first low voltage threshold corresponding to the battery are determined according to the optimal charging and discharging working intervals of the battery pack and the storage battery. In a possible embodiment, the first high pressure threshold may be, but not limited to, 30%, and the first low pressure threshold is 30%, respectively. That is, when the temperature value is lower than the low temperature threshold, if the requirements of the first high voltage threshold and the first low voltage threshold are met, the charging and discharging process between the battery and the battery pack can be carried out to turn on the heating mode.
在实际应用中，可以参照图2示出的进入加热模式的流程示意图，进入加热模式，具体包括：In practical applications, you can enter the heating mode with reference to the schematic flow chart of entering the heating mode shown in Figure 2, specifically including:
步骤S201，获取电池包和蓄电池的相关参数。Step S201, acquiring relevant parameters of the battery pack and the storage battery.
其中上述相关参数至少包括电池包的温度值、SOC，及蓄电池的SOC。The above-mentioned relevant parameters include at least the temperature value of the battery pack, the SOC, and the SOC of the storage battery.
步骤S202，判断电池包的温度值是否小于低温阈值。Step S202, judging whether the temperature value of the battery pack is lower than the low temperature threshold.
如果是，则执行步骤S203；如果否，则执行步骤S205。If yes, execute step S203; if no, execute step S205.
步骤S203，判断电池包的SOC是否大于第一高压阈值，且蓄电池的SOC是否大于第一低压阈值。Step S203, judging whether the SOC of the battery pack is greater than the first high-voltage threshold, and whether the SOC of the battery is greater than the first low-voltage threshold.
如果是，则执行步骤S204；如果否，则执行步骤S205。If yes, execute step S204; if no, execute step S205.
步骤S204，切换双向直流转换器的导通模式，进入加热模式。Step S204, switch the conduction mode of the bidirectional DC converter, and enter the heating mode.
步骤S205，等待驾驶员指令。Step S205, waiting for driver's instruction.
即在当前温度大于等于低温阈值，或者不能满足电池包的SOC大于第一高压阈值，且蓄电池的SOC大于第一低压阈值的条件时，不能进入加热模式，等待驾驶员指令。That is, when the current temperature is greater than or equal to the low-temperature threshold, or the condition that the SOC of the battery pack is greater than the first high-voltage threshold and the SOC of the battery is greater than the first low-voltage threshold cannot be satisfied, the heating mode cannot be entered and waits for the driver's instruction.
本发明实施例提供的电池包加热方法，应用于混合动力汽车的电子控制单元ECU，包括：当检测到车辆上电后，获取当前时间电池包的温度值；当该温度值小于低温阈值时，获取电池包的剩余电量SOC和蓄电池的SOC；根据电池包的SOC和所述蓄电池的SOC，切换双向直流转换器的导通模式，以控制电池包和蓄电池之间的充放电过程。在本发明实施例中，通过控制双向直流转换器进行导通模式的切换，控制电池包和蓄电池之间进行充放电的过程，从而对电池包进行加热，提高电池包内部的温度；无需增加加热部件，仅利用现有的充放电结构即可实现，简单易行，成本低，能够满足整车48V BSG轻混系统启动及助力的使用需求。The battery pack heating method provided by the embodiment of the present invention is applied to the electronic control unit ECU of a hybrid electric vehicle, including: when it is detected that the vehicle is powered on, acquiring the temperature value of the battery pack at the current time; when the temperature value is less than the low temperature threshold, Obtain the SOC of the remaining power of the battery pack and the SOC of the storage battery; switch the conduction mode of the bidirectional DC converter according to the SOC of the battery pack and the SOC of the storage battery, so as to control the charging and discharging process between the battery pack and the storage battery. In the embodiment of the present invention, by controlling the bidirectional DC converter to switch the conduction mode, the process of charging and discharging between the battery pack and the storage battery is controlled, thereby heating the battery pack and increasing the temperature inside the battery pack; no need to increase heating The components can be realized only by using the existing charging and discharging structure, which is simple and easy to implement and low in cost, and can meet the needs of starting and assisting the 48V BSG light hybrid system of the whole vehicle.
在可能的实施例中，上述步骤S103中：根据电池包的SOC和蓄电池的SOC，切换双向直流转换器的导通模式，包括以下两种情况：In a possible embodiment, in the above step S103: switching the conduction mode of the bidirectional DC converter according to the SOC of the battery pack and the SOC of the storage battery includes the following two situations:
第一种情况：First case:
当电池包的SOC大于等于第二高压阈值时，控制双向直流转换器的首次导通的导通模式为降压模式，以使电池包向蓄电池放电。When the SOC of the battery pack is greater than or equal to the second high-voltage threshold, the conduction mode for controlling the initial conduction of the bidirectional DC converter is a step-down mode, so that the battery pack discharges to the storage battery.
具体地，可以将电池包的SOC表示为HS，第一高压阈值表示为HS1，第二高压阈值表示为HS2，将蓄电池的SOC表示为LS，第一低压阈值表示为LS1。其中HS1<HS2，HS1和HS2可以根据电池包实际的最优充放电工作区间进行确定，这里不做限定；在可能的实施例中该HS1为30％，HS2为80％，LS1为30％。另外，电池包的额定电压大于蓄电池的额定电压。Specifically, the SOC of the battery pack can be denoted as HS , the first high voltage threshold is denoted as HS1 , the second high voltage threshold is denoted as HS2 , the SOC of the battery is denoted asLS , and the first low voltage threshold is denoted as LS1 . Where HS1 < HS2 , HS1 and HS2 can be determined according to the actual optimal charging and discharging working range of the battery pack, which is not limited here; in a possible embodiment, the HS1 is 30%, and the HS2 is 80% ,LS1 is 30%. In addition, the rated voltage of the battery pack is greater than the rated voltage of the storage battery.
上述第一种情况，即为在LS>LS1，且HS≥HS2的情况下，由电池包向蓄电池放电。进一步地，在首次导通的导通模式为降压模式之后，上述方法还包括：The above-mentioned first situation is when LS >LS1 , and HS ≥ HS2 , discharge from the battery pack to the storage battery. Further, after the conduction mode of the first conduction is the step-down mode, the above method further includes:
步骤a1，当检测到电池包的SOC小于等于升压切换阈值时，或者当蓄电池的SOC大于等于第二低压阈值时，停止降压模式，控制双向直流转换器的导通模式为升压模式，以使蓄电池为电池包充电。Step a1, when it is detected that the SOC of the battery pack is less than or equal to the boost switching threshold, or when the SOC of the battery is greater than or equal to the second low voltage threshold, stop the step-down mode, and control the conduction mode of the bidirectional DC converter to be the boost mode, to allow the battery to charge the battery pack.
其中，第一低压阈值表示为LS2，第二低压阈值大于第一低压阈值，即LS1<LS2，在可能的实施例中LS2为80％。升压切换阈值表示为HSM，升压切换阈值大于第一高压阈值且小于第二高压阈值，即HS1<HSM<HS2。在可能的实施例中，HSM＝HS1+5％。Wherein, the first low pressure threshold is denoted as LS2 , the second low pressure threshold is greater than the first low pressure threshold, that is, LS1 <LS2 , and LS2 is 80% in a possible embodiment. The boost switching threshold is denoted as HSM , and the boost switching threshold is greater than the first high voltage threshold and smaller than the second high voltage threshold, that is, HS1 <HSM <HS2 . In a possible embodiment, HSM =HS1 +5%.
具体地，电池包向蓄电池放电的过程中，电池包的电量逐渐减少，蓄电池的电量逐渐增多。当检测到HS≤HSM时，或者当LS≥LS2时，ECU发送升压切换指令至双向直流转换器，使得双向直流转换器的导通模式为升压模式，以使蓄电池为电池包充电。Specifically, during the process of discharging the battery pack to the battery, the power of the battery pack gradually decreases, and the power of the battery gradually increases. When it is detected that HS ≤ HSM , or when LS ≥ LS2 , the ECU sends a step-up switching command to the bidirectional DC converter, so that the conduction mode of the bidirectional DC converter is the boost mode, so that the battery becomes a battery pack charging.
步骤a2，当检测到电池包的SOC大于等于第二高压阈值时，或者当蓄电池的SOC小于等于降压切换阈值时，停止升压模式，控制双向直流转换器的导通模式为降压模式，以使电池包向蓄电池放电。Step a2, when it is detected that the SOC of the battery pack is greater than or equal to the second high voltage threshold, or when the SOC of the battery is less than or equal to the buck switching threshold, the boost mode is stopped, and the conduction mode of the bidirectional DC converter is controlled to be the buck mode, To discharge the battery pack to the battery.
其中降压切换阈值表示为LSM，该降压切换阈值大于第一低压阈值且小于第二低压阈值。即LS1<LSM<LS2。在可能的实施例中，LSM＝LS1+5％。Wherein the buck switching threshold is denoted as LSM , and the buck switching threshold is greater than the first low voltage threshold and smaller than the second low voltage threshold. That is, LS1 <LSM <LS2 . In a possible embodiment, LSM =LS1 +5%.
具体地，在步骤a2中，蓄电池为电池包充电的过程中，电池包的电量逐渐增加，蓄电池的电量逐渐减少，当检测到HS≥HS2时，或者当LS≤LSM时，ECU发送降压切换指令至双向直流转换器，使得双向直流转换器的导通模式为降压模式，以使电池包向蓄电池放电。Specifically, in step a2, when the battery is charging the battery pack, the power of the battery pack gradually increases, and the power of the battery gradually decreases. When it is detected that HS ≥ HS2 , or when LS ≤ LSM , the ECU Sending a step-down switching command to the bidirectional DC converter, so that the conduction mode of the bidirectional DC converter is a step-down mode, so that the battery pack discharges to the storage battery.
进一步地，电池包向蓄电池放电的过程中，电池包的电量又逐渐减少，蓄电池的电量又逐渐增多，依次重复上述步骤a1和a2，直至当上述温度值大于等于低温阈值时，或者当不再满足充放电加热条件时，控制双向直流转换器处于截止状态，以停止电池包和蓄电池之间的充放电过程。即在控制充放电过程中，实时检测温度值和电池包及蓄电池的SOC，当检测到温度值T≥T0时，或者当不再满足充放电加热条件时，退出加热模式。Further, in the process of discharging the battery pack to the storage battery, the power of the battery pack gradually decreases, and the power of the battery gradually increases, and the above steps a1 and a2 are repeated in sequence until the above temperature value is greater than or equal to the low temperature threshold, or when no longer When the charging and discharging heating conditions are met, the bidirectional DC converter is controlled to be in the cut-off state to stop the charging and discharging process between the battery pack and the storage battery. That is, in the process of controlling charge and discharge, the temperature value and the SOC of the battery pack and battery are detected in real time. When the temperature value T≥T0 is detected, or when the charging and discharging heating conditions are no longer met, the heating mode is exited.
第二种情况：Second case:
当电池包的SOC大于等于第一高压阈值且小于第二高压阈值时，控制双向直流转换器的首次导通的导通模式为升压模式，以使蓄电池为电池包充电。When the SOC of the battery pack is greater than or equal to the first high-voltage threshold and less than the second high-voltage threshold, the conduction mode for controlling the initial conduction of the bidirectional DC converter is a boost mode, so that the battery charges the battery pack.
上述第二种情况，即为在LS>LS1，且HS1<HS<HS2的情况下，由蓄电池为电池包充电。进一步地，在首次导通的导通模式为升压模式之后，上述方法还包括：In the second case above, when LS >LS1 and HS1 <HS <HS2 , the battery pack is charged by the storage battery. Further, after the conduction mode of the first conduction is the boost mode, the above method further includes:
步骤b1，当检测到电池包的SOC大于等于第二高压阈值时，或者当蓄电池的SOC小于等于降压切换阈值时，停止升压模式，控制双向直流转换器的导通模式为降压模式，以使电池包向蓄电池放电。Step b1, when it is detected that the SOC of the battery pack is greater than or equal to the second high voltage threshold, or when the SOC of the battery is less than or equal to the buck switching threshold, the boost mode is stopped, and the conduction mode of the bidirectional DC converter is controlled to be the buck mode, To discharge the battery pack to the battery.
具体地，蓄电池为电池包充电的过程中，电池包的电量逐渐增加，蓄电池的电量逐渐减少，当检测到HS≥HS2时，或者当LS≤LSM时，ECU发送降压切换指令至双向直流转换器，使得双向直流转换器的导通模式为降压模式，以使电池包向蓄电池放电。Specifically, during the process of the battery charging the battery pack, the power of the battery pack gradually increases, and the power of the battery gradually decreases. When it is detected that HS ≥ HS2 , or when LS ≤ LSM , the ECU sends a step-down switching command to the bidirectional DC converter, so that the conduction mode of the bidirectional DC converter is a step-down mode, so that the battery pack discharges to the storage battery.
步骤b2，当检测到电池包的SOC小于等于升压切换阈值时，或者当蓄电池的SOC大于等于第二低压阈值时，停止降压模式，控制双向直流转换器的导通模式为升压模式，以使蓄电池为所述电池包充电。Step b2, when it is detected that the SOC of the battery pack is less than or equal to the boost switching threshold, or when the SOC of the battery is greater than or equal to the second low voltage threshold, stop the step-down mode, and control the conduction mode of the bidirectional DC converter to be the boost mode, so that the storage battery charges the battery pack.
具体地，电池包向蓄电池放电的过程中，电池包的电量逐渐减少，蓄电池的电量逐渐增多。当检测到HS≤HSM时，或者当LS≥LS2时，ECU发送升压切换指令至双向直流转换器，使得双向直流转换器的导通模式为升压模式，以使蓄电池为电池包充电。Specifically, during the process of discharging the battery pack to the battery, the power of the battery pack gradually decreases, and the power of the battery gradually increases. When it is detected that HS ≤ HSM , or when LS ≥ LS2 , the ECU sends a step-up switching command to the bidirectional DC converter, so that the conduction mode of the bidirectional DC converter is the boost mode, so that the battery becomes a battery pack charging.
进一步地，蓄电池为电池包充电的过程中，电池包的电量又逐渐增加，蓄电池的电量又逐渐减少，依次重复上述步骤b1和b2，直至当上述温度值大于等于低温阈值时，或者当不再满足充放电加热条件时，控制双向直流转换器处于截止状态，以停止电池包和蓄电池之间的充放电过程。Further, in the process of the battery charging the battery pack, the power of the battery pack gradually increases, and the power of the battery gradually decreases, and the above steps b1 and b2 are repeated in sequence until the above temperature value is greater than or equal to the low temperature threshold, or when no longer When the charging and discharging heating conditions are met, the bidirectional DC converter is controlled to be in the cut-off state to stop the charging and discharging process between the battery pack and the storage battery.
具体地，比如在第二种情况时，在执行步骤b1时，出现了蓄电池的SOC小于第一低压阈值的情况，在确定退出加热模式。Specifically, for example, in the second case, when step b1 is executed, the SOC of the battery is lower than the first low-voltage threshold, and it is determined to exit the heating mode.
具体地，上述充放电循环过程(即加热模式)如图3所示，该循环过程包括：Specifically, the above-mentioned charging and discharging cycle process (ie, heating mode) is shown in Figure 3, and the cycle process includes:
步骤S301，检测电池包的SOC是否大于等于第二高压阈值。Step S301, detecting whether the SOC of the battery pack is greater than or equal to a second high voltage threshold.
如果是，执行步骤S302；如果否，执行步骤S304。If yes, execute step S302; if no, execute step S304.
步骤S302，控制双向直流转换器的导通模式为降压模式。Step S302, controlling the conduction mode of the bidirectional DC converter to be the step-down mode.
步骤S303，判断电池包的SOC是否小于等于升压切换阈值，或者蓄电池的SOC是否大于等于第二低压阈值。Step S303, judging whether the SOC of the battery pack is less than or equal to the boost switching threshold, or whether the SOC of the battery is greater than or equal to the second low voltage threshold.
如果是，则执行步骤S304；如果否，则执行步骤S302。If yes, execute step S304; if no, execute step S302.
步骤S304，控制双向直流转换器的导通模式为升压模式。Step S304, controlling the conduction mode of the bidirectional DC converter to be a boost mode.
步骤S305，判断电池包的SOC是否大于等于第二高压阈值，或者蓄电池的SOC是否小于等于降压切换阈值。Step S305, judging whether the SOC of the battery pack is greater than or equal to the second high voltage threshold, or whether the SOC of the battery is less than or equal to the step-down switching threshold.
如果是，则执行步骤S302；如果否，则执行步骤S304。If yes, execute step S302; if no, execute step S304.
在上述循环过程中，当上述电池包的温度值大于等于低温阈值时，或者当不再满足充放电加热条件时，控制双向直流转换器处于截止状态，以停止电池包和蓄电池之间的充放电过程，即退出图3所示的循环。In the above cycle process, when the temperature value of the above battery pack is greater than or equal to the low temperature threshold, or when the charging and discharging heating conditions are no longer met, the bidirectional DC converter is controlled to be in the cut-off state to stop the charging and discharging between the battery pack and the storage battery process, that is, exit the loop shown in Figure 3.
进一步地，参见图4示出了本发明实施例提供的一种电池包加热装置的结构示意图。如图4所示，该电池包加热装置应用于电子控制单元ECU，包括：Further, referring to FIG. 4 , a schematic structural diagram of a battery pack heating device provided by an embodiment of the present invention is shown. As shown in Figure 4, the battery pack heating device is applied to the electronic control unit ECU, including:
温度获取模块11，用于当检测到车辆上电后，获取当前时间电池包的温度值；The temperature acquisition module 11 is used to acquire the temperature value of the battery pack at the current time when it is detected that the vehicle is powered on;
SOC获取模块12，用于当上述温度值小于低温阈值时，获取电池包的剩余电量SOC和蓄电池的SOC；The SOC acquisition module 12 is used to acquire the SOC of the remaining power of the battery pack and the SOC of the storage battery when the above-mentioned temperature value is less than the low temperature threshold;
模式切换模块13，用于根据电池包的SOC和所述蓄电池的SOC，切换双向直流转换器的导通模式，以控制电池包和所述蓄电池之间的充放电过程。The mode switching module 13 is configured to switch the conduction mode of the bidirectional DC converter according to the SOC of the battery pack and the SOC of the storage battery, so as to control the charging and discharging process between the battery pack and the storage battery.
进一步地，上述电池包加热装置中，模式切换模块13还用于：Further, in the above battery pack heating device, the mode switching module 13 is also used for:
判断是否满足充放电加热条件，其中充放电加热条件为：电池包的SOC大于第一高压阈值，且蓄电池的SOC大于第一低压阈值；Judging whether the charging and discharging heating condition is met, wherein the charging and discharging heating condition is: the SOC of the battery pack is greater than the first high voltage threshold, and the SOC of the battery is greater than the first low voltage threshold;
如果是，根据电池包的SOC和蓄电池的SOC，切换双向直流转换器的导通模式。If yes, switch the conduction mode of the bidirectional DC converter according to the SOC of the battery pack and the SOC of the battery.
进一步地，上述电池包加热装置中，模式切换模块13还用于：Further, in the above battery pack heating device, the mode switching module 13 is also used for:
当电池包的SOC大于等于第二高压阈值时，控制双向直流转换器的首次导通的导通模式为降压模式，以使电池包向蓄电池放电；When the SOC of the battery pack is greater than or equal to the second high-voltage threshold, the conduction mode for controlling the initial conduction of the bidirectional DC converter is a step-down mode, so that the battery pack discharges to the battery;
当电池包的SOC大于等于第一高压阈值且小于第二高压阈值时，控制双向直流转换器的首次导通的导通模式为升压模式，以使蓄电池为电池包充电；When the SOC of the battery pack is greater than or equal to the first high-voltage threshold and less than the second high-voltage threshold, the conduction mode for controlling the first conduction of the bidirectional DC converter is a boost mode, so that the battery charges the battery pack;
其中，第二高压阈值大于第一高压阈值，电池包的额定电压大于蓄电池的额定电压。Wherein, the second high voltage threshold is greater than the first high voltage threshold, and the rated voltage of the battery pack is greater than the rated voltage of the storage battery.
进一步地，参见图5示出了本发明实施例提供的一种电池包加热系统的结构示意图。如图5所示，该电池包加热系统，包括电池包100、蓄电池200、双向直流转换器300及ECU400，蓄电池连接有智能电池传感器IBS 500，IBS 500用于采集蓄电池的SOC；ECU 400包括上述实施例中的电池包加热装置。Further, referring to FIG. 5 , a schematic structural diagram of a battery pack heating system provided by an embodiment of the present invention is shown. As shown in Figure 5, the battery pack heating system includes a battery pack 100, a storage battery 200, a bidirectional DC converter 300, and an ECU 400. The storage battery is connected to an intelligent battery sensor IBS 500, and the IBS 500 is used to collect the SOC of the storage battery; the ECU 400 includes the above-mentioned The battery pack heating device in the embodiment.
其中，IBS、电池包、双向直流转换器分别与ECU连接，电池包与蓄电池通过双向直流转换器连接。具体地，电池包的额定电压为48V，蓄电池的额定电压为12V。ECU通过CAN总线与电池包、双向直流转换器连接，并对该电池包和双向直流转换器进行控制。电池包通过48V线束与双向直流转换器连接，该双向直流转换器通过12V线束与蓄电池连接。Among them, the IBS, the battery pack, and the bidirectional DC converter are respectively connected to the ECU, and the battery pack and the storage battery are connected through the bidirectional DC converter. Specifically, the rated voltage of the battery pack is 48V, and the rated voltage of the storage battery is 12V. The ECU is connected to the battery pack and the bidirectional DC converter through the CAN bus, and controls the battery pack and the bidirectional DC converter. The battery pack is connected to the bidirectional DC converter through the 48V wiring harness, and the bidirectional DC converter is connected to the battery through the 12V wiring harness.
具体地，在加热模式中，降压模式对应的电流流向如图5中实线所示，升压模式对应的电流流向如图5中的虚线所示。Specifically, in the heating mode, the current flow direction corresponding to the step-down mode is shown by the solid line in FIG. 5 , and the current flow direction corresponding to the boost mode is shown by the dotted line in FIG. 5 .
进一步地，参见图6示出了本发明实施例提供的另一种电池包加热系统的结构示意图。在图5所示的电池包加热系统的基础上，该系统还包括BSG电机600、起动机700及负载800，起动机700及负载800均与双向直流转换器300连接，BSG电机600分别与电池包100、双向直流转换器300及ECU 400连接。Further, referring to FIG. 6 , a schematic structural diagram of another battery pack heating system provided by an embodiment of the present invention is shown. On the basis of the battery pack heating system shown in Figure 5, the system also includes a BSG motor 600, a starter 700 and a load 800, the starter 700 and the load 800 are connected to the bidirectional DC converter 300, and the BSG motor 600 is connected to the battery The package 100, the bidirectional DC converter 300 and the ECU 400 are connected.
具体地，该起动机的额定电压为12V，双向直流转换器通过12V线束分别与起动机和负载连接；ECU通过CAN总线与BSG电机连接，并对该BSG电机进行控制；电池包通过48V线束与BSG电机连接，为该BSG电机提供电能。Specifically, the rated voltage of the starter is 12V, and the bidirectional DC converter is connected to the starter and the load through the 12V wiring harness; the ECU is connected to the BSG motor through the CAN bus and controls the BSG motor; the battery pack is connected to the BSG motor through the 48V wiring harness. The BSG motor is connected to provide electric energy for the BSG motor.
具体地，在上述ECU中加载上述电池包加热方法对应的执行程序，即可通过上述电池包加热系统实现上述电池包加热方法中的方案。Specifically, by loading the execution program corresponding to the above-mentioned battery pack heating method in the above-mentioned ECU, the solution in the above-mentioned battery pack heating method can be realized through the above-mentioned battery pack heating system.
在本发明实施例中，通过控制双向直流转换器进行导通模式的切换，控制电池包和蓄电池之间进行充放电的过程，从而对电池包进行加热，提高电池包内部的温度；无需增加加热部件，仅利用现有的充放电结构即可实现，简单易行，成本低，能够满足整车48V BSG轻混系统启动及助力的使用需求。In the embodiment of the present invention, by controlling the bidirectional DC converter to switch the conduction mode, the process of charging and discharging between the battery pack and the storage battery is controlled, thereby heating the battery pack and increasing the temperature inside the battery pack; no need to increase heating The components can be realized only by using the existing charging and discharging structure, which is simple and easy to implement and low in cost, and can meet the needs of starting and assisting the 48V BSG light hybrid system of the whole vehicle.
本发明实施例提供的电池包加热装置及系统，与上述实施例提供的电池包加热方法具有相同的技术特征，所以也能解决相同的技术问题，达到相同的技术效果。The battery pack heating device and system provided in the embodiments of the present invention have the same technical features as the battery pack heating method provided in the above embodiments, so they can also solve the same technical problems and achieve the same technical effects.
本发明实施例所提供的进行电池包加热方法的计算机程序产品，包括存储了处理器可执行的非易失的程序代码的计算机可读存储介质，所述程序代码包括的指令可用于执行前面方法实施例中所述的方法，具体实现可参见方法实施例，在此不再赘述。The computer program product for performing the battery pack heating method provided by the embodiment of the present invention includes a computer-readable storage medium storing non-volatile program code executable by a processor, and the instructions included in the program code can be used to execute the preceding method For the method described in the embodiment, the specific implementation may refer to the method embodiment, and details are not repeated here.
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的装置及系统的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the device and system described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.
附图中的流程图和框图显示了根据本发明的多个实施例方法和计算机程序产品的可能实现的体系架构、功能和操作。在这点上，流程图或框图中的每个方框可以代表一个模块、程序段或代码的一部分，所述模块、程序段或代码的一部分包含一个或多个用于实现规定的逻辑功能的可执行指令。也应当注意，在有些作为替换的实现中，方框中所标注的功能也可以以不同于附图中所标注的顺序发生。例如，两个连续的方框实际上可以基本并行地执行，它们有时也可以按相反的顺序执行，这依所涉及的功能而定。也要注意的是，框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合，可以用执行规定的功能或动作的专用的基于硬件的系统来实现，或者可以用专用硬件与计算机指令的组合来实现。The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of methods and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by a dedicated hardware-based system that performs the specified function or action , or may be implemented by a combination of dedicated hardware and computer instructions.
此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对步骤、数字表达式和数值并不限制本发明的范围In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Relative steps, numerical expressions and numerical values of components and steps set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，又例如，多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些通信接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个处理器可执行的非易失的计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .
最后应说明的是：以上所述实施例，仅为本发明的具体实施方式，用以说明本发明的技术方案，而非对其限制，本发明的保护范围并不局限于此，尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，其依然可以对前述实施例所记载的技术方案进行修改或可轻易想到变化，或者对其中部分技术特征进行等同替换；而这些修改、变化或者替换，并不使相应技术方案的本质脱离本发明实施例技术方案的精神和范围，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。Finally, it should be noted that: the above-described embodiments are only specific implementations of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting them, and the scope of protection of the present invention is not limited thereto, although referring to the foregoing The embodiment has described the present invention in detail, and those skilled in the art should understand that any person familiar with the technical field can still modify the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention Changes can be easily thought of, or equivalent replacements are made to some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of the present invention within the scope of protection. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
| Application Number | Priority Date | Filing Date | Title |
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| CN201810274747.4ACN108501746B (en) | 2018-03-29 | 2018-03-29 | Battery pack heating method, device and system |
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| CN201810274747.4ACN108501746B (en) | 2018-03-29 | 2018-03-29 | Battery pack heating method, device and system |
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| CN201810274747.4AActiveCN108501746B (en) | 2018-03-29 | 2018-03-29 | Battery pack heating method, device and system |
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