CN103616558A - Voltage collecting device suitable for active power distribution network - Google Patents

Abstract

Translated fromChinese

一种适用于主动配电网的电压采集装置，该电压采集装置包含电池组，该电池组包含若干串联的单体电池，由单体电池与单体电池间的串联而产生连接阻抗，所述的电压采集装置还包含电路连接该电池组的电压采集芯片，该电压采集芯片采集电池组中每个单体电池的电压，所述的电压采集装置还包含电路连接该电池组的隔离阻抗检测电路，该隔离阻抗检测电路采集电池组中单体电池之间的连接阻抗的接触阻抗电压，该电压采集装置还包含连接电压采集芯片和隔离阻抗检测电路的微处理器。本发明不管是在静置的过程中还是在充放电的过程中，都能够精确的对电池组中各个单体电池的电压进行采集，提高了对单体电池性能判断的准确性。

A voltage acquisition device suitable for active distribution networks, the voltage acquisition device includes a battery pack, the battery pack includes a number of single cells connected in series, and the connection impedance is generated by the series connection between the single cells and the single cells, the said The voltage acquisition device also includes a voltage acquisition chip that is connected to the battery pack, and the voltage acquisition chip collects the voltage of each single battery in the battery pack, and the voltage acquisition device also includes an isolation impedance detection circuit that is connected to the battery pack The isolation impedance detection circuit collects the contact impedance voltage of the connection impedance between the single cells in the battery pack, and the voltage acquisition device also includes a microprocessor connected to the voltage acquisition chip and the isolation impedance detection circuit. The present invention can accurately collect the voltage of each single battery in the battery pack no matter in the process of standing still or in the process of charging and discharging, and improves the accuracy of judging the performance of the single battery.

Description

Translated fromChinese

一种适用于主动配电网的电压采集装置A voltage acquisition device suitable for active distribution network

技术领域technical field

    本发明涉及一种适用于主动配电网的电压采集装置。    The invention relates to a voltage acquisition device suitable for an active distribution network.

背景技术Background technique

储能电站电池电压的准确采集是控制电池充放电、提高电池性能的关键因素之一。现有电池电压采集电路对电压的采集仅仅在电池系统静置时可以非常准确的采集，但是对于正在做充放电的电池系统来说，由于单体电池与单体电池间的连接端子连接不稳定，容易形成一定的接触阻抗，使储能电站的电池管理系统无法取得准确的数据而不能有效地控制电池的工作。Accurate collection of battery voltage in energy storage power stations is one of the key factors to control battery charge and discharge and improve battery performance. The existing battery voltage acquisition circuit can only collect the voltage very accurately when the battery system is at rest, but for the battery system that is being charged and discharged, due to the unstable connection of the connection terminals between the single battery and the single battery , it is easy to form a certain contact impedance, so that the battery management system of the energy storage power station cannot obtain accurate data and cannot effectively control the work of the battery.

发明内容Contents of the invention

本发明提供的一种适用于主动配电网的电压采集装置，不管是在静置的过程中还是在充放电的过程中，都能够精确的对电池组中各个单体电池的电压进行采集，提高了对单体电池性能判断的准确性。The present invention provides a voltage collection device suitable for active power distribution network, which can accurately collect the voltage of each single battery in the battery pack, whether it is in the process of standing still or in the process of charging and discharging. The accuracy of judging the performance of the single battery is improved.

为了达到上述目的，本发明提供一种适用于主动配电网的电压采集装置，该电压采集装置包含电池组，该电池组包含若干串联的单体电池，由单体电池与单体电池间的串联而产生连接阻抗，所述的电压采集装置还包含电路连接该电池组的的电压采集芯片，该电压采集芯片采集电池组中每个单体电池的电压，所述的电压采集装置还包含电路连接该电池组的隔离阻抗检测电路，该隔离阻抗检测电路采集电池组中单体电池之间的连接阻抗的接触阻抗电压，该电压采集装置还包含连接电压采集芯片和隔离阻抗检测电路的微处理器。In order to achieve the above object, the present invention provides a voltage acquisition device suitable for active power distribution network, the voltage acquisition device includes a battery pack, the battery pack includes a number of single cells connected in series, and the connection between the single cells and the single cells connected in series to generate connection impedance, the voltage acquisition device also includes a voltage acquisition chip connected to the battery pack, the voltage acquisition chip collects the voltage of each single battery in the battery pack, and the voltage acquisition device also includes a circuit Connect the isolation impedance detection circuit of the battery pack, the isolation impedance detection circuit collects the contact impedance voltage of the connection impedance between the single cells in the battery pack, and the voltage acquisition device also includes a micro-processor for connecting the voltage acquisition chip and the isolation impedance detection circuit device.

所述的微处理器通过A/D转换电路连接隔离阻抗检测电路，该微处理器通过隔离通讯电路和通讯隔离变压器连接电压采集芯片。The microprocessor is connected to the isolation impedance detection circuit through the A/D conversion circuit, and the microprocessor is connected to the voltage acquisition chip through the isolation communication circuit and the communication isolation transformer.

所述的隔离阻抗检测电路为差分输入，该隔离阻抗检测电路包含电路连接的磁隔离运算放大器和低通滤波器。The isolation impedance detection circuit is a differential input, and the isolation impedance detection circuit includes a magnetic isolation operational amplifier and a low-pass filter connected in a circuit.

所述的电压采集芯片与隔离通讯电路之间为SPI通讯连接；隔离通讯电路与微处理器之间为CAN通讯连接；A/D转换电路与微处理器之间为SPI通讯连接。The voltage acquisition chip and the isolation communication circuit are connected by SPI communication; the isolation communication circuit and the microprocessor are connected by CAN communication; the A/D conversion circuit and the microprocessor are connected by SPI communication.

本发明很好的解决了在充放电的过程中，由于单体电池之间存在着连接阻抗而造城的电压采集不准确的问题，提高了电池管理系统对于单体电池的电压采集的要求和性能判断的准确性。The invention well solves the problem of inaccurate voltage collection due to the connection impedance between the single cells in the process of charging and discharging, and improves the battery management system's requirements and requirements for the voltage collection of the single cells. Accuracy of performance judgments.

附图说明Description of drawings

图1是本发明提供的一种适用于主动配电网的电压采集装置的电路图；Fig. 1 is a circuit diagram of a voltage acquisition device suitable for active distribution networks provided by the present invention;

图2是本发明的隔离阻抗检测电路的电路图。Fig. 2 is a circuit diagram of the isolation impedance detection circuit of the present invention.

具体实施方式Detailed ways

以下根据图1和图2，具体说明本发明的较佳实施例。The preferred embodiment of the present invention will be described in detail below according to FIG. 1 and FIG. 2 .

如图1所示，本发明提供一种适用于主动配电网的电压采集装置，该电压采集装置包含电池组100，该电池组100包含若干串联的单体电池，由单体电池与单体电池间的串联而产生连接阻抗103，所述的电压采集装置还包含电路连接该电池组100的电压采集芯片101，该电压采集芯片101采集电池组100中每个单体电池的电压，所述的电压采集装置还包含电路连接该电池组的100的隔离阻抗检测电路104，该隔离阻抗检测电路104采集电池组100中单体电池之间的连接阻抗103的接触阻抗电压。As shown in Figure 1, the present invention provides a voltage acquisition device suitable for active distribution networks, the voltage acquisition device includes a battery pack 100, the battery pack 100 includes a number of single cells connected in series, and the single cells and single cells The connection impedance 103 is generated by the series connection between the batteries, and the voltage acquisition device also includes avoltage acquisition chip 101 that is circuit-connected to the battery pack 100, and thevoltage acquisition chip 101 collects the voltage of each single battery in the battery pack 100. The voltage acquisition device further includes an isolation impedance detection circuit 104 that is electrically connected to the battery pack 100, and the isolation impedance detection circuit 104 collects the contact impedance voltage of the connection impedance 103 between the single cells in the battery pack 100.

所述的电压采集装置还包含微处理器106，该微处理器106通过A/D转换电路105连接隔离阻抗检测电路104，该微处理器106通过隔离通讯电路102和通讯隔离变压器107连接电压采集芯片101。Described voltage acquisition device also comprisesmicroprocessor 106, and thismicroprocessor 106 is connected isolation impedance detection circuit 104 by A/D conversion circuit 105, and thismicroprocessor 106 is connected voltage acquisition by isolation communication circuit 102 and communication isolation transformer 107.Chip 101.

所述的电压采集芯片101内置A/D转换器和电压采集电路，本实施例中，该电压采集芯片101的型号为AD7280A。Thevoltage acquisition chip 101 has a built-in A/D converter and a voltage acquisition circuit. In this embodiment, the model of thevoltage acquisition chip 101 is AD7280A.

如图2所示，所述的隔离阻抗检测电路104为差分输入，该隔离阻抗检测电路104包含电路连接的磁隔离运算放大器1041和低通滤波器1042。As shown in FIG. 2 , the isolation impedance detection circuit 104 has a differential input, and the isolation impedance detection circuit 104 includes a magnetic isolation operational amplifier 1041 and a low-pass filter 1042 connected in a circuit.

本实施例中，所述的微处理器106的型号为MSP430F135。In this embodiment, the model of themicroprocessor 106 is MSP430F135.

所述的通讯隔离变压器107为磁隔离变压器。The communication isolation transformer 107 is a magnetic isolation transformer.

所述的电压采集芯片101与隔离通讯电路102之间为SPI通讯连接；隔离通讯电路102与微处理器106之间为CAN通讯连接；A/D转换电路105与微处理器106之间为SPI通讯连接。The SPI communication connection between the describedvoltage acquisition chip 101 and the isolation communication circuit 102; the CAN communication connection between the isolation communication circuit 102 and themicroprocessor 106; the SPI communication connection between the A/D conversion circuit 105 and themicroprocessor 106 communication connection.

以测量电位最低的那一节单体电池为例，通过电压采集芯片101采集单体电池两端的电压，电压采集芯片101内部在对电压数据做完AD（模数）转换后，通过通讯隔离变压器107输出给隔离通讯电路102，并最终传递给微处理器106分析处理后得到电压U1；同样，隔离阻抗检测电路104对采集的单体电池之间的接触阻抗电压进行阻抗匹配、低通滤波以及隔离放大之后，经过A/D转换电路105，最终传递给微处理器106分析处理后得到电压值U2，二者的差值设为电压U3=U1-U2，即最终单体电池两端的实际电压。Taking the single battery with the lowest measured potential as an example, the voltage at both ends of the single battery is collected through thevoltage acquisition chip 101. 107 is output to the isolated communication circuit 102, and finally passed to themicroprocessor 106 for analysis and processing to obtain the voltage U1; similarly, the isolated impedance detection circuit 104 performs impedance matching, low-pass filtering and After isolation and amplification, through the A/D conversion circuit 105, it is finally transmitted to themicroprocessor 106 for analysis and processing to obtain the voltage value U2, and the difference between the two is set to the voltage U3=U1-U2, which is the actual voltage at both ends of the final single battery .

当电池组处于静置状态时，单体电池间的连接阻抗上流过的电流为零，得到单体电池间的连接阻抗的电压U2=0，最终单体电池两端的实际电压U3几乎等于由电压采集芯片检测到的电压U1。When the battery pack is in a static state, the current flowing through the connection impedance between the cells is zero, and the voltage U2=0 of the connection impedance between the cells is obtained, and finally the actual voltage U3 at both ends of the cells is almost equal to the voltage Collect the voltage U1 detected by the chip.

当电池组处于工作状态，充电或者放电时，单体电池间的连接阻抗上流过的电流不为零，得到单体电池间的连接阻抗的电压U2≠0，最终单体电池两端的实际电压U3=U1-U2。When the battery pack is in the working state, charging or discharging, the current flowing through the connection impedance between the single cells is not zero, and the voltage U2≠0 of the connection impedance between the single cells is obtained, and finally the actual voltage U3 at both ends of the single cells =U1-U2.

而不管电池系统处于静置状态还是处于充放电状态，均可以满足实际电池两端电压U3=U1-U2。Regardless of whether the battery system is in a static state or in a charging and discharging state, the actual battery voltage across both ends U3=U1-U2 can be satisfied.

对于第二节电池、第三节电池的计算方法以此类推就可以得到各个单体电池最终的端电压了。For the calculation method of the second battery and the third battery, the final terminal voltage of each single battery can be obtained by analogy.

本发明可以有效的除去由于单体电池之间的连接产生的接触阻抗所带来的单体电压的采集差异，对提高了电池系统的电压采集精度的提高以及判断的准确性。The invention can effectively remove the collection difference of the voltage of the single cells caused by the contact impedance caused by the connection between the single cells, and improves the accuracy of the voltage collection and the accuracy of the judgment of the battery system.

尽管本发明的内容已经通过上述优选实施例作了详细介绍，但应当认识到上述的描述不应被认为是对本发明的限制。在本领域技术人员阅读了上述内容后，对于本发明的多种修改和替代都将是显而易见的。因此，本发明的保护范围应由所附的权利要求来限定。Although the content of the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. Various modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the above disclosure. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims (4)

Translated fromChinese

1.一种适用于主动配电网的电压采集装置，其特征在于，该电压采集装置包含电池组（100），该电池组（100）包含若干串联的单体电池，由单体电池与单体电池间的串联而产生连接阻抗（103），所述的电压采集装置还包含电路连接该电池组的（100）的电压采集芯片（101），该电压采集芯片（101）采集电池组（100）中每个单体电池的电压，所述的电压采集装置还包含电路连接该电池组（100）的隔离阻抗检测电路（104），该隔离阻抗检测电路（104）采集电池组（100）中单体电池之间的连接阻抗（103）的接触阻抗电压，该电压采集装置还包含连接电压采集芯片（101）和隔离阻抗检测电路（104）的微处理器（106）。1. A voltage acquisition device suitable for active distribution networks, characterized in that the voltage acquisition device includes a battery pack (100), and the battery pack (100) includes a number of single cells connected in series. The connection impedance (103) is generated by the series connection between the batteries, and the voltage acquisition device also includes a voltage acquisition chip (101) that is circuit-connected to the battery pack (100), and the voltage acquisition chip (101) collects the battery pack (100 ), the voltage acquisition device also includes an isolation impedance detection circuit (104) connected to the battery pack (100), and the isolation impedance detection circuit (104) collects the voltage in the battery pack (100) The contact impedance voltage of the connection impedance (103) between single batteries, the voltage acquisition device also includes a microprocessor (106) connected to the voltage acquisition chip (101) and the isolation impedance detection circuit (104).2.如权利要求1所述的适用于主动配电网的电压采集装置，其特征在于，所述的微处理器（106）通过A/D转换电路（105）连接隔离阻抗检测电路（104），该微处理器（106）通过隔离通讯电路（102）和通讯隔离变压器（107）连接电压采集芯片（101）。2. The voltage acquisition device suitable for active distribution network according to claim 1, characterized in that, the microprocessor (106) is connected to the isolation impedance detection circuit (104) through the A/D conversion circuit (105) , the microprocessor (106) is connected to the voltage acquisition chip (101) through an isolated communication circuit (102) and a communication isolation transformer (107).3.如权利要求1所述的适用于主动配电网的电压采集装置，其特征在于，所述的隔离阻抗检测电路（104）为差分输入，该隔离阻抗检测电路（104）包含电路连接的磁隔离运算放大器（1041）和低通滤波器（1042）。3. The voltage acquisition device suitable for active distribution network according to claim 1, characterized in that, the isolated impedance detection circuit (104) is a differential input, and the isolated impedance detection circuit (104) includes a circuit connected Magnetically isolated operational amplifier (1041) and low pass filter (1042).4.如权利要求1-3中任意一个所述的适用于主动配电网的电压采集装置，其特征在于，所述的电压采集芯片（101）与隔离通讯电路（102）之间为SPI通讯连接；隔离通讯电路（102）与微处理器（106）之间为CAN通讯连接；A/D转换电路（105）与微处理器（106）之间为SPI通讯连接。4. The voltage acquisition device suitable for active distribution network according to any one of claims 1-3, characterized in that, the voltage acquisition chip (101) and the isolated communication circuit (102) are connected by SPI communication connection; the isolated communication circuit (102) and the microprocessor (106) are connected by CAN communication; the A/D conversion circuit (105) and the microprocessor (106) are connected by SPI communication.

Images