CN111775706A - A power battery low-voltage manual maintenance switch control system and vehicle - Google Patents

Abstract

The invention discloses a power battery low-voltage manual maintenance switch control system and a vehicle, comprising: the system comprises a power battery pack, a battery pack circuit breaking unit, a battery management unit and a low-voltage manual maintenance switch; the power battery pack is connected with the battery pack circuit breaking unit, and the battery pack circuit breaking unit is used for completing the internal power distribution function of the power battery and controlling the voltage and the current of a high-voltage output loop of the power battery; the low-voltage manual maintenance switch is connected with an interlocking loop of the battery management unit and a battery management unit awakening power supply loop in series, and is connected with at least two high-voltage acquisition points in the battery pack breaking unit; the battery pack circuit breaking unit is connected with the battery management unit, and the battery management unit is used for controlling a relay and high-voltage loop detection in the battery pack circuit breaking unit. Compared with the traditional high-voltage MSD, the invention has smaller volume and lighter weight, the exposed part does not occupy the space of the whole vehicle, and the cost is low.

Description

Translated fromChinese

一种动力电池低压手动维护开关控制系统及车辆A power battery low-voltage manual maintenance switch control system and vehicle

技术领域technical field

本发明涉及动力电池低压手动维护开关控制技术领域，具体涉及一种动力电池低压手动维护开关控制系统及车辆。The invention relates to the technical field of power battery low-voltage manual maintenance switch control, in particular to a power battery low-voltage manual maintenance switch control system and a vehicle.

背景技术Background technique

近年来，随着国家大力推进新能源汽车的发展，也极大的带动了动力电池的发展，动力电池的安全性也越来越重要。为了保证动力电池在使用及售后维修过程中的安全性，手动维护开关(Manual Service Disconnect，MSD)已经成为动力电池的主流配置。In recent years, with the country's vigorous promotion of the development of new energy vehicles, it has also greatly driven the development of power batteries, and the safety of power batteries has become more and more important. In order to ensure the safety of the power battery during use and after-sales maintenance, the manual maintenance switch (Manual Service Disconnect, MSD) has become the mainstream configuration of the power battery.

传统带MSD的控制系统为高压型MSD控制系统,该高压MSD内置熔断器及高压铜排，对插完成后能够起到短路保护的作用，插头拔开能够起到断开高压母排的作用，保证了动力电池的高压安全。但是高压MSD，结构复杂，由于内置熔断器，体积较大，成本也随之增加。The traditional control system with MSD is a high-voltage MSD control system. The high-voltage MSD has built-in fuses and high-voltage copper bars, which can play the role of short-circuit protection after the plug is completed, and the plug can be disconnected. Ensure the high voltage safety of the power battery. However, the high-voltage MSD has a complex structure. Due to the built-in fuse, the volume is large and the cost also increases.

因此，亟需提供一种动力电池低压手动维护开关控制系统的技术方案，能够解决传统高压MSD内置熔断器，体积大，露在动力电池组外，占用整车空间，且成本高的经济性问题；并且在取消高压MSD后，动力电池在使用或维修过程中无法完全保证断开高压的安全性问题；以及电池管理系统(Battery Management System，BMS)或电池管理单元(BatteryManagement Unit，BMU)休眠后，无法读取整包电压及绝缘阻抗值的技术性问题。Therefore, there is an urgent need to provide a technical solution for a low-voltage manual maintenance switch control system for power batteries, which can solve the economical problems of traditional high-voltage MSD built-in fuses, which are bulky, exposed outside the power battery pack, occupying vehicle space, and high cost. ; And after the high-voltage MSD is cancelled, the power battery cannot fully guarantee the safety of disconnecting the high-voltage during use or maintenance; , the technical problem that the voltage and insulation resistance value of the whole package cannot be read.

发明内容SUMMARY OF THE INVENTION

为解决现有技术中存在的问题，本发明提出一种动力电池低压手动维护开关控制系统，包括：动力电池组、电池包断路单元、电池管理单元和低压手动维护开关；In order to solve the problems existing in the prior art, the present invention proposes a low-voltage manual maintenance switch control system for a power battery, including: a power battery pack, a battery pack circuit breaker unit, a battery management unit and a low-voltage manual maintenance switch;

所述动力电池组与所述电池包断路单元连接，所述电池包断路单元用于完成动力电池内部配电功能，并对所述动力电池的高压输出回路的电压及电流进行控制；The power battery pack is connected to the battery pack circuit breaker unit, and the battery pack circuit breaker unit is used to complete the internal power distribution function of the power battery and to control the voltage and current of the high-voltage output circuit of the power battery;

所述低压手动维护开关串接入所述电池管理单元的互锁回路及所述电池管理单元唤醒电源回路，同时所述低压手动维护开关连接所述电池包断路单元内部的至少两个高压采集点；The low-voltage manual maintenance switch is connected in series to the interlock circuit of the battery management unit and the battery management unit wake-up power circuit, and the low-voltage manual maintenance switch is connected to at least two high-voltage collection points inside the battery pack circuit breaker unit. ;

所述电池包断路单元与所述电池管理单元连接，所述电池管理单元用于控制所述电池包断路单元内部的继电器及高压回路检测。The battery pack circuit breaker unit is connected to the battery management unit, and the battery management unit is used for controlling a relay inside the battery pack circuit breaker unit and high-voltage loop detection.

进一步地、还包括：整车控制器；Further, it also includes: a vehicle controller;

所述整车控制器与所述电池管理单元控制连接。The vehicle controller is in control connection with the battery management unit.

进一步地、还包括：控制器；Further, it also includes: a controller;

所述控制器与所述整车控制器连接，所述控制器还与所述电池包断路单元控制连接，所述整车控制器用于在所述动力电池组发生故障时向所述控制器发送故障指令，以使所述控制器停止整车高压用电器工作。The controller is connected to the vehicle controller, and the controller is also connected to the battery pack circuit breaker unit, and the vehicle controller is used to send a message to the controller when the power battery pack fails. The fault command is used to make the controller stop the work of the high-voltage electrical appliances of the whole vehicle.

进一步地、所述电池包断路单元包括：第一继电器、第二继电器、第三继电器和预充电阻；所述第一继电器的一端与所述第三继电器的一端均与所述动力电池组的第一电极连接，所述第一继电器的另一端分别与所述预充电阻的一端和所述高压输出回路的第二电极连接，所述第三继电器的另一端与所述预充电阻的另一端连接；所述第二继电器的一端连接所述动力电池组的第三电极，所述第二继电器的另一端连接所述高压输出回路的第四电机；Further, the battery pack circuit breaking unit includes: a first relay, a second relay, a third relay and a pre-charging resistor; one end of the first relay and one end of the third relay are both connected to the power battery pack. The first electrode is connected, the other end of the first relay is respectively connected with one end of the precharging resistor and the second electrode of the high voltage output circuit, and the other end of the third relay is connected with the other end of the precharging resistor. one end of the second relay is connected to the third electrode of the power battery pack, and the other end of the second relay is connected to the fourth motor of the high-voltage output circuit;

所述第一继电器、所述第二继电器和所述第三继电器均与所述电池管理单元连接，所述电池管理单元用于根据所述第一继电器、所述第二继电器和所述第三继电器的状态检测所述动力电池组是否故障。The first relay, the second relay and the third relay are all connected to the battery management unit, and the battery management unit is configured to The state of the relay detects whether the power battery pack is faulty.

进一步地、所述第二继电器为预充继电器。Further, the second relay is a precharge relay.

进一步地、所述高压输出回路包括：多个相互并联的高压输出子回路。Further, the high-voltage output circuit includes: a plurality of high-voltage output sub-circuits connected in parallel with each other.

进一步地、每个高压输出子回路均与所述电池管理单元连接；Further, each high-voltage output sub-circuit is connected to the battery management unit;

所述电池管理单元用于采集每个所述高压输出子回路的电流值和/或电压值。The battery management unit is used for collecting the current value and/or the voltage value of each of the high-voltage output sub-circuits.

进一步地、所述电池包断路单元还包括：分流器，所述分流器的一端连接所述第二继电器的一端，所述分流器的一端连接所述动力电池组的第三电极；所述分流器的采集端连接所述电池管理单元。Further, the battery pack circuit breaking unit further includes: a shunt, one end of the shunt is connected to one end of the second relay, and one end of the shunt is connected to the third electrode of the power battery pack; the shunt The collection end of the device is connected to the battery management unit.

进一步地、还包括：高压采样设备；Further, it also includes: high-voltage sampling equipment;

所述高压采样设备与所述低压手动维护开关连接。The high pressure sampling device is connected to the low pressure manual maintenance switch.

另一方面、本发明提供一种车辆，所述车辆设置有如上述所述的动力电池低压手动维护开关控制系统。In another aspect, the present invention provides a vehicle equipped with the power battery low-voltage manual maintenance switch control system as described above.

实施本发明具有以下有益效果：Implementing the present invention has the following beneficial effects:

1)相对传统高压MSD，体积更小，质量更轻，外露部分不侵占整车空间，成本低廉；1) Compared with the traditional high-voltage MSD, it is smaller in size and lighter in weight, the exposed part does not occupy the space of the vehicle, and the cost is low;

2)可以通过断开MSD后，断开BMS或BMU唤醒电源，BMS或BMU控制继电器断开，继而断开高压回路；2) After disconnecting the MSD, disconnect the BMS or BMU to wake up the power supply, the BMS or BMU control relay is disconnected, and then disconnect the high-voltage circuit;

3)内置高压绝缘采集点，可以将BDU中的高压检测点引入低压MSD中，通过外置设备读取动力电池组高压绝缘阻值。3) The built-in high-voltage insulation collection point can introduce the high-voltage detection point in the BDU into the low-voltage MSD, and read the high-voltage insulation resistance value of the power battery pack through an external device.

附图说明Description of drawings

为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例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，下面描述中的附图仅仅是本发明的一些实施例，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它附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

图1本发明实施例提供的一种动力电池低压手动维护开关控制系统结构图；1 is a structural diagram of a power battery low-voltage manual maintenance switch control system provided by an embodiment of the present invention;

图2本发明实施例提供的另一种动力电池低压手动维护开关控制系统结构图；2 is a structural diagram of another power battery low-voltage manual maintenance switch control system provided by an embodiment of the present invention;

其中，1-动力电池组、2-电池包断路单元、3-电池管理单元、4-低压手动维护开关、5-整车控制器、6-控制器、7-高压采样设备；Among them, 1- power battery pack, 2- battery pack circuit breaker unit, 3- battery management unit, 4- low-voltage manual maintenance switch, 5- vehicle controller, 6- controller, 7- high-voltage sampling equipment;

21-第一继电器、22-第二继电器、23-第三继电器、24-预充电阻、25-高压输出回路、26-分流器；21-first relay, 22-second relay, 23-third relay, 24-precharge resistor, 25-high voltage output circuit, 26-shunt;

251-第一高压输出子回路、252-第二高压输出子回路、253-第三高压输出子回路、254-第四高压输出子回路；251- the first high-voltage output sub-circuit, 252- the second high-voltage output sub-circuit, 253- the third high-voltage output sub-circuit, 254- the fourth high-voltage output sub-circuit;

255-第一高压采样线，256-第二高压采样线，257-第三高压采样线，258-第四高压采样线。255 - the first high-voltage sampling line, 256 - the second high-voltage sampling line, 257 - the third high-voltage sampling line, 258 - the fourth high-voltage sampling line.

具体实施方式Detailed ways

下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

在本发明的描述中，需要理解的是，术语“上”、“下”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或者元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on those shown in the accompanying drawings The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

需要说明的是，当一个元件被认为是“连接”另一个元件时，它可以是电路连接，也可是通信连接。It should be noted that when an element is considered to be "connected" to another element, it can be a circuit connection or a communication connection.

除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the present application are for the purpose of describing particular embodiments only, and are not intended to limit the present application.

图1本发明实施例提供的一种动力电池低压手动维护开关控制系统结构图，如图1所示，本发明提供一种动力电池低压手动维护开关控制系统，包括：动力电池组1、电池包断路单元2、电池管理单元3和低压手动维护开关4；Figure 1 is a structural diagram of a low-voltage manual maintenance switch control system for a power battery provided by an embodiment of the present invention. As shown in Figure 1, the present invention provides a low-voltage manual maintenance switch control system for a power battery, including: apower battery pack 1, a battery packCircuit breaker unit 2,battery management unit 3 and low-voltagemanual maintenance switch 4;

所述动力电池组1与所述电池包断路单元2连接，所述电池包断路单元2用于完成动力电池内部配电功能，并对所述动力电池的高压输出回路25的电压及电流进行控制；Thepower battery pack 1 is connected to the battery packcircuit breaker unit 2, and the battery packcircuit breaker unit 2 is used to complete the internal power distribution function of the power battery and to control the voltage and current of the highvoltage output circuit 25 of the power battery. ;

所述低压手动维护开关4串接入所述电池管理单元3的互锁回路及所述电池管理单元3唤醒电源回路，同时所述低压手动维护开关4连接所述电池包断路单元2内部的至少两个高压采集点；The low-voltagemanual maintenance switch 4 is connected in series to the interlock circuit of thebattery management unit 3 and thebattery management unit 3 wakes up the power supply circuit, and the low-voltagemanual maintenance switch 4 is connected to at least one of the internal batterypack circuit breakers 2 . Two high-voltage collection points;

所述电池包断路单元2与所述电池管理单元3连接，所述电池管理单元3用于控制所述电池包断路单元2内部的继电器及高压回路检测。The battery packcircuit breaker unit 2 is connected to thebattery management unit 3 , and thebattery management unit 3 is used to control the relays inside the battery packcircuit breaker unit 2 and the detection of the high voltage circuit.

具体的，动力电池组1可以包括多组串联动力电池，每组动力电池可以由多个串联的单体动力电池。单体动力电池的额定电压在本说明书中不做具体，可以根据实际需要进行设置。在一些可能的实施例中，动力电池组1可以设置在电池包断路单元2中。可以理解的是，动力电池组1也可以设置在电池包断路单元2外侧，动力电池组1可以与电池包断路单元2的电源接口连接，用于为电池包断路单元2及车辆其他用电设备提供电能。Specifically, thepower battery pack 1 may include multiple groups of power batteries connected in series, and each group of power batteries may be composed of multiple single power batteries connected in series. The rated voltage of the single power battery is not specified in this manual, and can be set according to actual needs. In some possible embodiments, thepower battery pack 1 may be arranged in the battery packcircuit breaker unit 2 . It can be understood that thepower battery pack 1 can also be arranged outside the battery packcircuit breaker unit 2, and thepower battery pack 1 can be connected to the power interface of the battery packcircuit breaker unit 2 for providing the battery packcircuit breaker unit 2 and other electrical equipment of the vehicle. Provide power.

具体的，电池包断路单元2可以用于完成动力电池内部配电功能，并对所述动力电池的高压输出回路25的电压及电流进行控制。Specifically, the battery packcircuit breaker unit 2 can be used to complete the internal power distribution function of the power battery, and to control the voltage and current of the high-voltage output circuit 25 of the power battery.

示例地、当动力电池组1为四种电器(分别为M、N、O和P四种电器)进行供电时，M对应的熔断器的额定电流为40A、N对应的熔断器的额定电流为40A、O对应的熔断器的额定电流为200A及P对应的熔断器的额定电流为350A，电池包断路单元2可以根据M、N、O和P四种电器的额定电流或其他工作参数完成对动力电池组1的电流分配，保证不同电器的安全运行。For example, when thepower battery pack 1 supplies power for four kinds of electrical appliances (M, N, O, and P, respectively), the rated current of the fuse corresponding to M is 40A, and the rated current of the fuse corresponding to N is The rated current of the fuse corresponding to 40A and O is 200A and the rated current of the fuse corresponding to P is 350A. The current distribution of thepower battery pack 1 ensures the safe operation of different electrical appliances.

具体的，电池管理单元3可以时上述的BMS或BMU，电池管理单元3可以实时监测不同电器的供电回路的工作参数，以实现对供电线路的安全进行监测。电池管理单元3与电池包断路单元2的连接方式为电路连接和通信连接，电池包断路单元2为电池管理单元3提供电源，电池管理单元3则监测并控制电池包断路单元2中的电子元器件的运行参数。Specifically, thebattery management unit 3 may be the above-mentioned BMS or BMU, and thebattery management unit 3 may monitor the working parameters of the power supply circuits of different electrical appliances in real time, so as to monitor the safety of the power supply lines. The connection between thebattery management unit 3 and the batterypack breaking unit 2 is circuit connection and communication connection. The batterypack breaking unit 2 provides power for thebattery management unit 3, and thebattery management unit 3 monitors and controls the batterypack breaking unit 2. Electronic elements Device operating parameters.

具体的，低压手动维护开关4串接BMS或BMU的互锁回路及BMS或BMU唤醒电源回路，同时连接BDU内部的若干高压采集点。电池管理单元3用于为低压手动维护开关4提供电能。低压手动维护开关4还与电池包断路单元2通过第一高压采样线255、第二高压采样线256、第三高压采样线257和第四高压采样线258连接，低压手动维护开关4内部可以设置有高压检测接口用于与高压检测设备连接，便于用户检测动力电池组的内部电压值。Specifically, the low-voltagemanual maintenance switch 4 is connected in series with the interlock circuit of the BMS or the BMU and the wake-up power circuit of the BMS or the BMU, and is simultaneously connected to several high-voltage collection points inside the BDU. Thebattery management unit 3 is used to provide power for the low-voltagemanual maintenance switch 4 . The low-voltagemanual maintenance switch 4 is also connected to the battery packcircuit breaker unit 2 through the first high-voltage sampling line 255, the second high-voltage sampling line 256, the third high-voltage sampling line 257 and the fourth high-voltage sampling line 258, and the low-voltagemanual maintenance switch 4 can be set inside There is a high-voltage detection interface for connecting with high-voltage detection equipment, which is convenient for users to detect the internal voltage value of the power battery pack.

在上述实施例基础上，本说明书一个实施例中，所述动力电池低压手动维护开关控制系统还包括：整车控制器5；On the basis of the above embodiment, in an embodiment of this specification, the power battery low-voltage manual maintenance switch control system further includes: avehicle controller 5;

所述整车控制器5与所述电池管理单元3连接。Thevehicle controller 5 is connected to thebattery management unit 3 .

具体的，整车控制器5与电池管理单元3通信连接，整车控制器5用于在动力电池组1使用过程中发生内部故障时，发出提示提醒车辆动力电池组1需要维修。整车控制器5还用于负责整车运行中各个电器子单元信息的处理及分配。整车控制器5还用于采集高压回路的电压，通过电压值判断整包及继电器，熔断器连接状态。Specifically, thevehicle controller 5 is connected in communication with thebattery management unit 3 , and thevehicle controller 5 is used to issue a prompt to remind the vehiclepower battery pack 1 that maintenance is required when an internal fault occurs during the use of thepower battery pack 1 . Thevehicle controller 5 is also used for processing and distributing the information of each electrical sub-unit in the operation of the vehicle. Thevehicle controller 5 is also used to collect the voltage of the high-voltage circuit, and judge the connection status of the whole package, relays, and fuses through the voltage value.

在上述实施例基础上，本说明书一个实施例中，所述动力电池低压手动维护开关控制系统还包括：控制器6；On the basis of the above embodiment, in an embodiment of this specification, the power battery low-voltage manual maintenance switch control system further includes: acontroller 6;

所述控制器6与所述整车控制器5连接，所述控制器6还与所述电池包断路单元2连接。Thecontroller 6 is connected to thevehicle controller 5 , and thecontroller 6 is also connected to the batterypack disconnecting unit 2 .

具体的，控制器6可以是二合一控制或三合一控制器6，控制器6与整车控制器5通信连接，控制器6还与电池包断路单元2电连接。电池包断路单元2用于为控制器6提供电能。整车控制器5用于在动力电池组1发生故障时向控制器6发送故障指令，以使控制器6停止整车高压用电器工作。其中，三合一控制器6包括电机控制器6、DC/DC、电动压缩机电源或者PDU(配电单元)。二合一控制器6可以包括控制器6、DC/DC或者电动压缩机电源或者PDU等。Specifically, thecontroller 6 may be a two-in-one controller or a three-in-onecontroller 6 , thecontroller 6 is connected in communication with thevehicle controller 5 , and thecontroller 6 is also electrically connected with the battery packcircuit breaker unit 2 . The batterypack disconnecting unit 2 is used to provide power to thecontroller 6 . Thevehicle controller 5 is used to send a fault instruction to thecontroller 6 when thepower battery pack 1 fails, so that thecontroller 6 stops the operation of the vehicle's high-voltage electrical appliances. The three-in-onecontroller 6 includes amotor controller 6, a DC/DC, an electric compressor power supply or a PDU (power distribution unit). The two-in-onecontroller 6 may include thecontroller 6, a DC/DC or electric compressor power supply or a PDU, and the like.

在上述实施例基础上，图2本发明实施例提供的另一种动力电池低压手动维护开关控制系统结构图；如图2所示，本说明书一个实施例中，所述电池包断路单元2包括：第一继电器21、第二继电器22、第三继电器23和预充电阻24；所述第一继电器21的一端与所述第三继电器23的一端均与所述动力电池组1的第一电极连接，所述第一继电器21的另一端分别与所述预充电阻24的一端和所述高压输出回路25的第二电极连接，所述第三继电器23的另一端与所述预充电阻24的另一端连接；所述第二继电器22的一端连接所述动力电池组1的第三电极，所述第二继电器22的另一端连接所述高压输出回路25的第四电机；On the basis of the above embodiment, FIG. 2 is a structural diagram of another power battery low-voltage manual maintenance switch control system provided by the embodiment of the present invention; as shown in FIG. 2 , in an embodiment of this specification, the battery packcircuit breaker unit 2 includes: : thefirst relay 21 , thesecond relay 22 , thethird relay 23 and thepre-charging resistor 24 ; one end of thefirst relay 21 and one end of thethird relay 23 are connected to the first electrode of thepower battery pack 1 The other end of thefirst relay 21 is respectively connected to one end of theprecharging resistor 24 and the second electrode of the highvoltage output circuit 25, and the other end of thethird relay 23 is connected to theprecharging resistor 24 The other end of thesecond relay 22 is connected to the third electrode of thepower battery pack 1, and the other end of thesecond relay 22 is connected to the fourth motor of the high-voltage output circuit 25;

所述第一继电器21、所述第二继电器22和所述第三继电器23均与所述电池管理单元3连接，所述电池管理单元3用于根据所述第一继电器21、所述第二继电器22和所述第三继电器23的状态检测所述动力电池组1是否故障。Thefirst relay 21 , thesecond relay 22 and thethird relay 23 are all connected to thebattery management unit 3 , and thebattery management unit 3 is configured to The state of therelay 22 and thethird relay 23 detects whether thepower battery pack 1 is faulty.

具体的，第一继电器21、第二继电器22、第三继电器23和预充电阻24的额定参数在本说明书实施例中不做具体限定，可以根据实际需要进行设置。Specifically, the rated parameters of thefirst relay 21 , thesecond relay 22 , thethird relay 23 and theprecharging resistor 24 are not specifically limited in the embodiments of this specification, and can be set according to actual needs.

第一继电器21和第三继电器23连接在动力电池组1的第一电极，用于控制动力电池组1第一电极的输出，第二继电器22连接在动力电池组1的第三电极，用于控制动力电池组1第三电极的输出。Thefirst relay 21 and thethird relay 23 are connected to the first electrode of thepower battery pack 1 for controlling the output of the first electrode of thepower battery pack 1, and thesecond relay 22 is connected to the third electrode of thepower battery pack 1 for controlling the output of the first electrode of thepower battery pack 1. Control the output of the third electrode of thepower battery pack 1.

需要说明的是，第一电极与第二电极是相同电极，第三电极与第四电极是相同电极，第一电极与第三电极是相反电极。第一继电器21、第二继电器22、第三继电器23和预充电阻24在BDU中的数量也不是固定的，可以根据外部高压电器件的数量及控制要求进行设置，可以理解的是控制要求可以包括：单独控制和多个同步控制。It should be noted that the first electrode and the second electrode are the same electrode, the third electrode and the fourth electrode are the same electrode, and the first electrode and the third electrode are opposite electrodes. The number of thefirst relay 21, thesecond relay 22, thethird relay 23 and thepre-charging resistor 24 in the BDU is not fixed, and can be set according to the number of external high-voltage electrical devices and control requirements. It can be understood that the control requirements can be Including: individual control and multiple simultaneous controls.

具体的，电池管理单元3可以分别于动力电池组1的第一电极和第三电极连接，用于监测动力电池组1的工作参数。Specifically, thebattery management unit 3 may be respectively connected to the first electrode and the third electrode of thepower battery pack 1 for monitoring the working parameters of thepower battery pack 1 .

其中，第一继电器21为主正极继电器(main positive relay)，第二继电器22为预充电继电器(precharge relay)，第三继电器23为主负极继电器(main negative relay)，与动力电池组1正极连接的回路为主正极电路(MAIN POSITIVE CIRCUIT)，与动力电池组1负极连接的回路为主负极电路(MAIN NEGATIVE CIRCUIT)，ORANGE LINES:图中分流器26与电池管理单元3的连接线为电流信号采集线，其余细线为高压取样线路(hv samplinglines)；Thefirst relay 21 is a main positive relay, thesecond relay 22 is a precharge relay, and thethird relay 23 is a main negative relay, which is connected to the positive pole of thepower battery pack 1 The circuit of the main positive circuit (MAIN POSITIVE CIRCUIT), the circuit connected to the negative pole of thepower battery pack 1 is the main negative circuit (MAIN NEGATIVE CIRCUIT), ORANGE LINES: The connection line between theshunt 26 and thebattery management unit 3 in the figure is the current signal Collection line, the rest of the thin lines are high-voltage sampling lines (hv sampling lines);

其中，电池包断路单元2包括六个母线连接接口(busbar connect interface)，分流器26设置在其中一个母线连接接口中；电池包断路单元2还包括两个低压连接器(lvconnector)，其中一个低压连接器为六脚连接器用于连接电池管理单元3，另一个低压连接器为十二脚连接器也用于连接电池管理单元3；第一高压输出子回路251、第二高压输出子回路252、第三高压输出子回路253和第四高压输出子回路254均通过高压连接器(hvconnector)与高压用电设备连接。The batterypack breaking unit 2 includes six busbar connect interfaces, and theshunt 26 is arranged in one of the busbar connection interfaces; the batterypack breaking unit 2 also includes two low-voltage connectors (lvconnectors), one of which is a low-voltage connector. The connector is a six-pin connector for connecting to thebattery management unit 3, and the other low-voltage connector is a twelve-pin connector for connecting thebattery management unit 3; the first high-voltage output sub-circuit 251, the second high-voltage output sub-circuit 252, Both the third high-voltage output sub-circuit 253 and the fourth high-voltage output sub-circuit 254 are connected to the high-voltage electrical equipment through a high-voltage connector (hvconnector).

示例地、本说明书实施例提供的BDU内部为第一继电器21、第二继电器22、第三继电器23，如果外部高压电器件为多个且需要单独控制时，可以根据需要增加，可以理解的是第一继电器21类的并联，第三继电器23类的并联连接，第二继电器22类与第一继电器21类并联。Exemplarily, the BDU provided in the embodiment of this specification is thefirst relay 21, thesecond relay 22, and thethird relay 23. If there are multiple external high-voltage devices and they need to be controlled individually, they can be added as needed. It is understandable that 21 types of first relays are connected in parallel, 23 types of third relays are connected in parallel, and 22 types of second relays are connected in parallel with 21 types of first relays.

在上述实施例基础上，本说明书一个实施例中，所述第二继电器22为预充继电器。Based on the above embodiment, in an embodiment of the present specification, thesecond relay 22 is a precharge relay.

具体的，第一继电器21和第三继电器23可以是主继电器；第二继电器22可以是预充继电器。可以理解的是，预充继电器的工作参数可以根据实际需要进行设置。Specifically, thefirst relay 21 and thethird relay 23 may be main relays; thesecond relay 22 may be a precharge relay. It can be understood that the working parameters of the precharge relay can be set according to actual needs.

在上述实施例基础上，本说明书一个实施例中，所述高压输出回路25包括：多个相互并联的高压输出子回路。Based on the above embodiment, in an embodiment of the present specification, the high-voltage output circuit 25 includes: a plurality of high-voltage output sub-circuits connected in parallel with each other.

具体的，每个高压输出子回路均可以包括至少一个熔断器，熔断器的额定参数可以根据实际需要进行设置。每个高压输出子回路可以输出相同或不同的电流或电压。Specifically, each high-voltage output sub-circuit may include at least one fuse, and the rated parameters of the fuse may be set according to actual needs. Each high voltage output sub-circuit can output the same or different current or voltage.

在上述实施例基础上，本说明书一个实施例中，每个高压输出子回路均与所述电池管理单元3连接；Based on the above embodiment, in an embodiment of this specification, each high-voltage output sub-circuit is connected to thebattery management unit 3;

所述电池管理单元3用于采集每个所述高压输出子回路的电流值和/或电压值。Thebattery management unit 3 is used to collect the current value and/or the voltage value of each of the high-voltage output sub-circuits.

具体的，每个高压输出子回路的两端均可以与电池管理单元3连接，电池管理单元3可以用于监测高压输出子回路的工作电压或工作电流。Specifically, both ends of each high-voltage output sub-circuit can be connected to thebattery management unit 3, and thebattery management unit 3 can be used to monitor the working voltage or working current of the high-voltage output sub-circuit.

在上述实施例基础上，本说明书一个实施例中，所述电池包断路单元2还包括：分流器26，所述分流器26的一端连接所述第二继电器22的一端，所述分流器26的一端连接所述动力电池组1的第三电极；所述分流器26的采集端连接所述电池管理单元3。On the basis of the above embodiment, in an embodiment of the present specification, the battery packcircuit breaker unit 2 further includes: ashunt 26, one end of theshunt 26 is connected to one end of thesecond relay 22, and theshunt 26 One end of the shunt is connected to the third electrode of thepower battery pack 1 ; the collection end of theshunt 26 is connected to thebattery management unit 3 .

所述电池管理单元3用于检测分流器26的电流值。Thebattery management unit 3 is used to detect the current value of theshunt 26 .

具体的，电池管理单元3用于通过分流器26监测动力电池组1的工作电流。Specifically, thebattery management unit 3 is used to monitor the working current of thepower battery pack 1 through theshunt 26 .

在上述实施例基础上，本说明书一个实施例中，所述的动力电池低压手动维护开关控制系统，还包括：高压采样设备7；On the basis of the above embodiment, in an embodiment of this specification, the power battery low-voltage manual maintenance switch control system further includes: a high-voltage sampling device 7;

所述高压采样设备7与所述低压手动维护开关4连接。The highpressure sampling device 7 is connected to the low pressuremanual maintenance switch 4 .

具体的，高压采样设备7用于采集低压手动维护开关4内部的高压采集点电压及绝缘阻值。高压采样设备7在本说明书实施例中不做具体限定。Specifically, the high-voltage sampling device 7 is used to collect the voltage and insulation resistance of the high-voltage collection point inside the low-voltagemanual maintenance switch 4 . The high-voltage sampling device 7 is not specifically limited in the embodiments of this specification.

本说明书实施例提供的动力电池低压手动维护开关控制系统的工作原理可以是：The working principle of the power battery low-voltage manual maintenance switch control system provided by the embodiments of this specification may be as follows:

1.动力电池组1在使用过程中发生内部故障时，BMS检测到动力电池组1故障，并将指令发送给整车控制器5及三合一控制器6；1. When an internal fault occurs in thepower battery pack 1 during use, the BMS detects the fault of thepower battery pack 1 and sends an instruction to thevehicle controller 5 and the three-in-onecontroller 6;

2.整车控制器5发出指令提醒车辆动力电池需要维修，三合一控制器6收到指令后停止整车高压用电器工作；2. Thevehicle controller 5 sends an instruction to remind the vehicle power battery to be repaired, and the three-in-onecontroller 6 stops the high-voltage electrical appliances of the vehicle after receiving the instruction;

3.断开低压MSD，BMS唤醒供电回路及互锁回路断开，BMS检测到唤醒供电回路断路后控制主继电器断开，完成高压回路断路；3. Disconnect the low-voltage MSD, the BMS wake-up power supply circuit and the interlock circuit are disconnected, and the BMS controls the main relay to disconnect after detecting that the wake-up power supply circuit is disconnected to complete the high-voltage circuit disconnection;

4.通过外部采样设备读取动力电池组1内部电压及绝缘阻值，确认动力电池组1的状态。4. Read the internal voltage and insulation resistance of thepower battery pack 1 through an external sampling device to confirm the status of thepower battery pack 1.

现阶段，动力电池组1的熔断器基本集成在了电池包断路单元2(BatteryDisconnect Unit，BDU)中，BDU专为动力电池组1内部设专计，也是高压配电盒的一种。本说明书实施例提供的动力电池低压手动维护开关控制系统，将BMS或BMU唤醒电源串接在MSD插头与插座中，可以通过断开MSD的插头，继而断开BMS或BMU的唤醒电源，断开高压回路主继电器，完成高压回路断路，同时该MSD内置动力电池高压绝缘检测点，可以在BMS或BMU休眠的情况下通过外置设备读取动力电池组1内部电压值及绝缘阻值。At this stage, the fuse of thepower battery pack 1 is basically integrated in the battery pack disconnect unit 2 (Battery Disconnect Unit, BDU). The BDU is specially designed for the interior of thepower battery pack 1 and is also a type of high-voltage power distribution box. In the power battery low-voltage manual maintenance switch control system provided by the embodiments of this specification, the BMS or BMU wake-up power is connected in series to the MSD plug and socket, and the MSD plug can be disconnected, and then the BMS or BMU wake-up power can be disconnected. The high-voltage circuit main relay completes the high-voltage circuit circuit breaker. At the same time, the MSD has a built-in power battery high-voltage insulation detection point, which can read the internal voltage value and insulation resistance value of thepower battery pack 1 through an external device when the BMS or BMU is dormant.

本发明的实施进一步优化了低压手动维护开关4的尺寸、质量以及成本；新增电池管理单元3低压唤醒回路，可以通过MSD的断开继而断开BMU唤醒供电，断开高压主继电器；可以通过低压手动维护开关4用外置物理设备读取动力电池组1内部的电压及绝缘阻值等参数；The implementation of the present invention further optimizes the size, quality and cost of the low-voltagemanual maintenance switch 4; the low-voltage wake-up circuit of thebattery management unit 3 is newly added, and the BMU wake-up power supply can be disconnected by disconnecting the MSD, and the high-voltage main relay can be disconnected; The low-voltagemanual maintenance switch 4 uses an external physical device to read parameters such as voltage and insulation resistance inside thepower battery pack 1;

另一方面、本发明提供一种车辆，所述车辆设置有如上述所述的动力电池低压手动维护开关控制系统。In another aspect, the present invention provides a vehicle equipped with the power battery low-voltage manual maintenance switch control system as described above.

由于所述车辆设置有动力电池低压手动维护开关控制系统，因此车辆具有动力电池低压手动维护开关控制系统的技术效果，不在赘述。Since the vehicle is provided with the power battery low-voltage manual maintenance switch control system, the vehicle has the technical effect of the power battery low-voltage manual maintenance switch control system, which will not be repeated.

在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。此外，本领域人员可以将本说明书中描述的不同实施例或示例进行接合和组合。In the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., means a specific feature described in connection with the embodiment or example, A structure, material, or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改和变型。Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications and variations.

Claims (10)

1. A power battery low pressure manual maintenance switch control system characterized in that includes: the system comprises a power battery pack (1), a battery pack disconnection unit (2), a battery management unit (3) and a low-voltage manual maintenance switch (4);

the power battery pack (1) is connected with the battery pack circuit breaking unit (2), and the battery pack circuit breaking unit (2) is used for completing the internal power distribution function of the power battery and controlling the voltage and the current of a high-voltage output loop (25) of the power battery;

the low-voltage manual maintenance switch (4) is connected in series with an interlocking loop of the battery management unit (3) and a power supply wake-up loop of the battery management unit (3), and meanwhile, the low-voltage manual maintenance switch (4) is connected with at least two high-voltage acquisition points inside the battery pack circuit breaking unit (2);

the battery pack circuit breaking unit (2) is connected with the battery management unit (3), and the battery management unit (3) is used for controlling a relay and high-voltage loop detection in the battery pack circuit breaking unit (2).

2. The power cell low voltage manual maintenance switch control system of claim 1, further comprising: a vehicle control unit (5);

and the vehicle control unit (5) is in control connection with the battery management unit (3).

3. The power cell low voltage manual maintenance switch control system of claim 2, further comprising: a controller (6);

the controller (6) with vehicle control unit (5) are connected, controller (6) still with battery package circuit break unit (2) control connection, vehicle control unit (5) are used for when power battery group (1) breaks down to controller (6) send the trouble instruction, so that controller (6) stop whole car high voltage with electrical apparatus work.

4. The power cell low voltage manual maintenance switch control system according to claim 1, characterized in that the battery pack disconnection unit (2) comprises: a first relay (21), a second relay (22), a third relay (23) and a pre-charging resistor (24); one end of the first relay (21) and one end of the third relay (23) are both connected with a first electrode of the power battery pack (1), the other end of the first relay (21) is respectively connected with one end of the pre-charging resistor (24) and a second electrode of the high-voltage output circuit (25), and the other end of the third relay (23) is connected with the other end of the pre-charging resistor (24); one end of the second relay (22) is connected with a third electrode of the power battery pack (1), and the other end of the second relay (22) is connected with a fourth motor of the high-voltage output loop (25);

the first relay (21), the second relay (22) and the third relay (23) are connected with the battery management unit (3), and the battery management unit (3) is used for detecting whether the power battery pack (1) is in fault according to the states of the first relay (21), the second relay (22) and the third relay (23).

5. The power cell low voltage manual maintenance switch control system according to claim 4, characterized in that said second relay (22) is a pre-charge relay.

6. The power cell low voltage manual maintenance switch control system according to claim 1, wherein said high voltage output circuit (25) comprises: and the high-voltage output sub-loops are mutually connected in parallel.

7. The power battery low-voltage manual maintenance switch control system according to claim 1, characterized in that each high-voltage output sub-loop is connected with the battery management unit (3);

the battery management unit (3) is used for collecting the current value and/or the voltage value of each high-voltage output sub-loop.

8. The power cell low voltage manual maintenance switch control system according to claim 4, characterized in that the battery pack disconnection unit (2) further comprises: one end of the shunt (26) is connected with one end of the second relay (22), and one end of the shunt (26) is connected with the third electrode of the power battery pack (1); the collection end of the shunt (26) is connected with the battery management unit (3).

9. The power cell low voltage manual maintenance switch control system of claim 1, further comprising: a high-voltage sampling device (7);

the high-voltage sampling equipment (7) is connected with the low-voltage manual maintenance switch (4).

10. A vehicle provided with a power cell low voltage manual maintenance switch control system according to any one of claims 1-9.

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