CN209592233U - Electrical vehicular power battery core monitors system - Google Patents
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Abstract
本实用新型揭示了一种电动车动力电芯监测系统，包括控制单元、多个电池模组和采样板，各个所述电池模组上均连接一块采样板，电池模组中的采样电芯与所在模组中的采样板相连接，第一电池模组采样板与控制单元相通过通讯线连接，相邻电池模组上的采样板之间通过通讯线级联。采用本实用新型电池包内各个电池模组与控制单元之间连接线极少，简化了布线，防止故障发生，且可对电芯的电压和温度进行检测，监测效果更佳。
The utility model discloses a power cell monitoring system for an electric vehicle, which includes a control unit, a plurality of battery modules and a sampling board, each of the battery modules is connected to a sampling board, and the sampling cells in the battery module are connected to the sampling board. The sampling boards in the modules are connected, the first battery module sampling board is connected to the control unit through communication lines, and the sampling boards on adjacent battery modules are cascaded through communication lines. The battery pack of the utility model has very few connection lines between each battery module and the control unit, simplifies the wiring, prevents failures, and can detect the voltage and temperature of the battery cells, and the monitoring effect is better.
Description
技术领域technical field
本实用新型实施例涉及电动汽车配件技术领域，尤其涉及一种电动车动力电芯监测系统。The embodiment of the utility model relates to the technical field of electric vehicle accessories, in particular to a monitoring system for electric vehicle power cells.
背景技术Background technique
电动车动力电池包中包含有多个电池模组，使用过程中需要对电池模组进行检测，现有技术中，一般是通过对各个电池模组中某几个电池进行采样和检测，采样线一端直接连接电池模组中的多个电芯，采样线另一端连接电池管理系统（BMS）的控制单元，由于电池包中电池模组较多，且电池模组中也需要连接许多根采样线，例如一个电池包中包含12个电池模组，需要对每个电池模组中的6节电芯进行检测，则需要连接72根采样线，这样会造成采样线束比较凌乱，同时这么多线束也容易导致采样故障发生。The electric vehicle power battery pack contains multiple battery modules, and the battery modules need to be tested during use. In the prior art, it is generally by sampling and testing certain batteries in each battery module, and the sampling line One end is directly connected to multiple cells in the battery module, and the other end of the sampling line is connected to the control unit of the battery management system (BMS). Since there are many battery modules in the battery pack, and many sampling lines need to be connected to the battery module For example, a battery pack contains 12 battery modules, and it is necessary to detect 6 cells in each battery module, and 72 sampling lines need to be connected, which will cause the sampling wiring harness to be messy, and so many wiring harnesses are also It is easy to cause sampling failure.
发明内容Contents of the invention
本实用新型实施例的目的在于，提供一种电动车动力电芯监测系统，减少电池模组与控制单元之间的采样线，便于布线，防止故障发生。The purpose of the embodiment of the utility model is to provide a power cell monitoring system for an electric vehicle, which reduces the sampling lines between the battery module and the control unit, facilitates wiring, and prevents failures.
本实用新型实施例提供了一种电动车动力电芯监测系统，包括控制单元、多个电池模组和采样板，各个所述电池模组上均连接一块采样板，所述采样板由电池监控芯片及其外围电路构成，各个电池模组内的采样电芯串联，且各个采样电芯的正极与所在模组的采样板的采集接口相连接，串联的采样电芯中位于最末端的电芯，其电芯负极与采样板对应接口相连接，第一电池模组的采样板与控制单元相通过通讯线连接，相邻电池模组上的采样板之间通过通讯线级联。The embodiment of the utility model provides an electric vehicle power cell monitoring system, including a control unit, a plurality of battery modules and a sampling board, each of the battery modules is connected to a sampling board, and the sampling board is monitored by the battery The chip and its peripheral circuit are composed of the sampling cells in each battery module in series, and the positive pole of each sampling cell is connected to the sampling interface of the sampling board of the module where it is located. The battery at the end of the series sampling cells is , the negative electrode of the battery cell is connected to the corresponding interface of the sampling board, the sampling board of the first battery module is connected to the control unit through a communication line, and the sampling boards on adjacent battery modules are cascaded through a communication line.
优选地，所述第一电池模组采样板上电池监控芯片的引脚IPA和引脚IMA分别与控制单元对应引脚通过通讯线相连接，电池模组内的采样电芯串联，且各个采样电芯的正极分别与电池监控芯片的各个采集引脚相连接，串联的采样电芯中位于最末端的电芯，其电芯负极与电池监控芯片的对应引脚相连接。Preferably, the pins IPA and IMA of the battery monitoring chip on the sampling board of the first battery module are respectively connected to the corresponding pins of the control unit through communication lines, the sampling cells in the battery module are connected in series, and each sampling The positive poles of the cells are respectively connected to the acquisition pins of the battery monitoring chip, and the negative poles of the cells located at the end of the series sampling cells are connected to the corresponding pins of the battery monitoring chip.
优选地，位于前一级电池模组采样板上的电池监控芯片，其引脚IPB和引脚IMB分别与下一级电池模组采样板上电池监控芯片的引脚IPA和引脚IMA相连接。Preferably, the battery monitoring chip located on the previous battery module sampling board, its pin IPB and pin IMB are respectively connected with the pin IPA and the pin IMA of the battery monitoring chip on the next battery module sampling board .
优选地，所述通讯线为屏蔽双绞线，第一电池模组采样板与控制单元之间的屏蔽双脚线的两根线中，其中一根连接于第一电池模组采样板上电池监控芯片引脚IPA与控制单元对应引脚之间，另一根连接于第一电池模组采样板上电池监控芯片引脚IMA与控制单元对应引脚之间；相邻电池模组采样板之间的屏蔽双脚线的两根线中，其中一根连接于电池监控芯片的引脚IPB与相邻的电池监控芯片的引脚IPA，另一根连接于电池监控芯片的引脚IMB与相邻的电池监控芯片的引脚IMA之间，各个采样板的接地引脚与采样板自身所连接的屏蔽双绞线的屏蔽层相连接。Preferably, the communication wire is a shielded twisted pair, and one of the two wires of the shielded pair of wires between the first battery module sampling board and the control unit is connected to the battery on the first battery module sampling board. Between the monitoring chip pin IPA and the corresponding pin of the control unit, the other is connected between the battery monitoring chip pin IMA and the corresponding pin of the control unit on the first battery module sampling board; Among the two wires of the shielded double-pin wires, one of them is connected to the pin IPB of the battery monitoring chip and the pin IPA of the adjacent battery monitoring chip, and the other is connected to the pin IMB of the battery monitoring chip and the corresponding pin. Between the pin IMA of the adjacent battery monitoring chip, the ground pin of each sampling board is connected to the shielding layer of the shielded twisted pair connected to the sampling board itself.
优选地，所述相邻的采样板之间通过变压器相连接，位于前一级电池模组采样板上的电池监控芯片，其引脚IPB和引脚IMB分别连接变压器的其中一侧的两端，位于后一级电池模组采样板上的电池监控芯片，其引脚IPA和引脚IMA分别连接于变压器另一侧的两端。Preferably, the adjacent sampling boards are connected through a transformer, and the battery monitoring chip located on the previous battery module sampling board has its pins IPB and pins IMB respectively connected to both ends of one side of the transformer , the battery monitoring chip located on the battery module sampling board of the latter stage, its pin IPA and pin IMA are respectively connected to the two ends on the other side of the transformer.
优选地，电池模组中至少部分电芯上贴附有热敏电阻，各个热敏电阻的一端均连接于电池监控芯片的引脚V-，各个热敏电阻的另一端分别连接于电池监控芯片的模拟量采集引脚，且各个热敏电阻的另一端分别串联有一个电阻，各个电阻的另一端均连接于电池监控芯片的引脚VREF2，各个热敏电阻两端均并联有一个电容。Preferably, at least some of the cells in the battery module are attached with thermistors, one end of each thermistor is connected to the pin V- of the battery monitoring chip, and the other end of each thermistor is respectively connected to the battery monitoring chip The other end of each thermistor is connected in series with a resistor, the other end of each resistor is connected to the pin V REF2 of the battery monitoring chip, and a capacitor is connected in parallel at both ends of each thermistor.
优选地，所述电池监控芯片为LTC6811、LTC3300或LTC6803。Preferably, the battery monitoring chip is LTC6811, LTC3300 or LTC6803.
本实用新型的有益效果在于：采用本实用新型电池包内各个电池模组与控制单元之间的连接线极少，简化了布线，防止故障发生，且可对电芯的电压和温度进行采样和处理，监测效果更为稳定。The beneficial effect of the utility model is that: the connection wires between each battery module and the control unit in the battery pack of the utility model are very few, the wiring is simplified, the failure is prevented, and the voltage and temperature of the battery cell can be sampled and analyzed. treatment, the monitoring effect is more stable.
附图说明Description of drawings
图1是电动车动力电芯监测系统示意图；Figure 1 is a schematic diagram of an electric vehicle power cell monitoring system;
图2是采样板示意图；Fig. 2 is a schematic diagram of a sampling plate;
图3是电池模组内对电芯抽样进行温度检测电路图。Fig. 3 is a circuit diagram of temperature detection for battery cell sampling in the battery module.
具体实施方式Detailed ways
下面结合附图详细描述本实用新型实施例的示例性实施例。Exemplary embodiments of embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
如图1-2所示，本实用新型所述的电动车动力电芯监测系统包括多个电池模组、控制单元和采样板，控制单元即为电池管理系统（BMS），属于现有技术，这里不做过多描述，各个电池模组上均设有一块采样板，采样板由芯片LTC6811及其外围电路构成。具体地，如图2所示，对电池模组内6个串联电芯进行采样，将各个电芯的正极分别与LTC6811的电压采样引脚C1~C6相连接，将处于最末端的电芯负极与芯片引脚C0相连接。同时，各个电池模组上的采样板级联，第一电池模组上的采样板上LTC6811芯片，其引脚IPA和引脚IMA分别与控制单元对应引脚通过通讯线相连接。这里需要说明的是采用LTC6811芯片仅为优选方案，实际使用时可用其它LTC系列的芯片替代，如使用LTC3300、LTC6803。As shown in Figure 1-2, the electric vehicle power cell monitoring system described in the utility model includes a plurality of battery modules, a control unit and a sampling board, and the control unit is a battery management system (BMS), which belongs to the prior art. Without going into too much description here, each battery module is equipped with a sampling board, which is composed of the chip LTC6811 and its peripheral circuits. Specifically, as shown in Figure 2, the six series cells in the battery module are sampled, the positive poles of each cell are connected to the voltage sampling pins C1~C6 of the LTC6811, and the negative pole of the battery cell at the end is Connect with chip pin C0. At the same time, the sampling boards on each battery module are cascaded. On the sampling board of the first battery module, the LTC6811 chip, its pins IPA and IMA are respectively connected to the corresponding pins of the control unit through communication lines. What needs to be explained here is that the use of the LTC6811 chip is only the preferred solution. In actual use, other LTC series chips can be used instead, such as LTC3300 and LTC6803.
第一电池模组的采样板与第二电池模组采样板相连接，第二电池模组采样板与第三电池模组采样板相连接，依次类推，使得所有电池模组的采样板级联。具体地，如图1所示，第一电池模组采样板LTC6811芯片的引脚IPB和引脚IMB分别连接第二电池模组的引脚IPA和引脚IMA，第二电池模组采样板的引脚IPB和引脚IMB分别连接第三模组采样板的引脚IPA和引脚IMA，依次类推，直至各个采样板级联。The sampling board of the first battery module is connected to the sampling board of the second battery module, the sampling board of the second battery module is connected to the sampling board of the third battery module, and so on, so that the sampling boards of all battery modules are cascaded . Specifically, as shown in Figure 1, the pin IPB and pin IMB of the first battery module sampling board LTC6811 chip are respectively connected to the pin IPA and pin IMA of the second battery module, and the pins of the second battery module sampling board The pin IPB and the pin IMB are respectively connected to the pin IPA and the pin IMA of the sampling board of the third module, and so on until each sampling board is cascaded.
具体地，所述通讯线为屏蔽双绞线，屏蔽双绞线外设有屏蔽层，第一电池模组采样板与控制单元之间的屏蔽双脚线的两根线中，其中一根连接于第一电池模组采样板上LTC6811芯片引脚IPA与控制单元对应引脚之间，另一根连接于第一电池模组采样板上LTC6811芯片引脚IMA与控制单元对应引脚之间；相邻电池模组采样板之间的屏蔽双脚线的两根线中，其中一根连接于LTC6811芯片的引脚IPB与相邻的LTC6811芯片的引脚IPA，另一根连接于LTC6811芯片的引脚IMB与相邻的LTC6811芯片的引脚IMA之间，各个采样板的接地引脚与采样板自身所连接的屏蔽双绞线的屏蔽层相连接。Specifically, the communication line is a shielded twisted pair, and the shielded twisted pair is provided with a shielding layer, and one of the two lines of the shielded pair of wires between the first battery module sampling board and the control unit is connected to the Between the pin IPA of the LTC6811 chip on the first battery module sampling board and the corresponding pin of the control unit, and the other one is connected between the pin IMA of the LTC6811 chip on the first battery module sampling board and the corresponding pin of the control unit; Among the two wires of the shielded double-pin wires between adjacent battery module sampling boards, one of them is connected to the pin IPB of the LTC6811 chip and the pin IPA of the adjacent LTC6811 chip, and the other is connected to the pin of the LTC6811 chip Between the pin IMB and the pin IMA of the adjacent LTC6811 chip, the ground pin of each sampling board is connected to the shielding layer of the shielded twisted pair connected to the sampling board itself.
特别地，各个采样板之间通过变压器相连接，第一电池模组采样板上引脚IPB和引脚IMB分别连接变压器的其中一侧的两端，第二电池模组采样板上引脚IPA和引脚IMA分别连接于变压器另一侧的两端，参照上述，第二电池模组采样板上引脚IPB和引脚IMB分别连接变压器的其中一侧的两端，第三电池模组采样板上引脚IPA和引脚IMA分别连接于变压器另一侧的两端。各个电池模组上的采样板之间采用相同的连接方式，这里不再赘述。In particular, each sampling board is connected through a transformer, the pin IPB and the pin IMB on the first battery module sampling board are respectively connected to both ends of one side of the transformer, and the pin IPA on the second battery module sampling board is and the pin IMA are respectively connected to the two ends of the other side of the transformer. Referring to the above, the pin IPB and the pin IMB on the second battery module sampling board are respectively connected to the two ends of one side of the transformer, and the third battery module sampling board The pins IPA and IMA on the board are respectively connected to the two ends on the other side of the transformer. The sampling boards on each battery module adopt the same connection method, which will not be repeated here.
采用本实用新型还可对电池模组内电芯的温度抽样进行温度检测，具体电路如图3所示，对电池模组内随机挑选五个电芯进行温度检测，抽样的五个电芯的正极均贴附有一个热敏电阻RT1~RT5，各个热敏电阻RT1~RT5的一端均连接于LTC6811芯片的引脚V-，各个热敏电阻RT1~RT5的另一端分别连接于LTC6811芯片的模拟量采集引脚GPIO1~GPIO5，且各个热敏电阻RT1~RT5的另一端分别串联有一个电阻R1~R5，电阻R1~R5的另一端均连接于LTC6811芯片的引脚VREF2，各个热敏电阻RT1~RT5两端均并联有电容C1~C5，且电容C1~C5的一端连接于LTC6811芯片的引脚V-，电容C1~C5的另一端连接于LTC6811芯片的模拟量采集引脚GPIO5。这里需要说明的，由于LTC6811仅含有GPIO1~ GPIO5五个模拟量采集引脚，因此最多可对电池模组内五个电芯进行检测，当然也可仅选择1个、2个、3个或4个电芯进行检测，相应的电路可参照上述，这里不再赘述。Adopting the utility model can also carry out temperature detection on the temperature sampling of the battery cells in the battery module, the specific circuit is shown in Figure 3, and five cells are randomly selected in the battery module for temperature detection, and the temperature of the sampled five cells is A thermistor RT1~RT5 is attached to the positive electrode, one end of each thermistor RT1~RT5 is connected to the pin V- of the LTC6811 chip, and the other end of each thermistor RT1~RT5 is respectively connected to the analog circuit of the LTC6811 chip. Quantity acquisition pins GPIO1~GPIO5, and the other ends of each thermistor RT1~RT5 are respectively connected in series with a resistor R1~R5, and the other ends of the resistors R1~R5 are connected to the pin V REF2 of the LTC6811 chip, each thermistor Capacitors C1~C5 are connected in parallel at both ends of RT1~RT5, and one end of capacitors C1~C5 is connected to the pin V- of the LTC6811 chip, and the other end of capacitors C1~C5 is connected to the analog acquisition pin GPIO5 of the LTC6811 chip. It needs to be explained here that since the LTC6811 only contains five analog acquisition pins GPIO1~GPIO5, it can detect up to five cells in the battery module. Of course, only 1, 2, 3 or 4 can be selected. Each battery cell is tested, and the corresponding circuit can refer to the above, and will not be repeated here.
通过以上描述可以看出，采用本实用新型电池包内各个电池模组与控制单元之间的连接线极少，简化了布线，防止故障发生，监测效果更为稳定，且可对电芯的电压和温度进行采样和处理，监测效果更佳。It can be seen from the above description that the connection wires between each battery module and the control unit in the battery pack of the utility model are very few, which simplifies the wiring, prevents failures, and has a more stable monitoring effect, and can monitor the voltage of the battery cells. and temperature for sampling and processing, the monitoring effect is better.
当然，以上只是本实用新型的典型实例，除此之外，本实用新型还可以有其它多种具体实施方式，凡采用等同替换或等效变换形成的技术方案，均落在本实用新型要求保护的范围之内。Of course, the above are only typical examples of the utility model. In addition, the utility model can also have other various specific implementation modes. within the range.
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| CN115372825A (en) * | 2022-08-10 | 2022-11-22 | 安徽卓越电气有限公司 | Single voltage and single temperature composite acquisition circuit of explosion-proof battery system and data sequencing control method thereof |
| US20230117908A1 (en) * | 2021-10-14 | 2023-04-20 | Arm Limited | Battery cell monitoring systems, battery packs, and methods of operation of the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230117908A1 (en) * | 2021-10-14 | 2023-04-20 | Arm Limited | Battery cell monitoring systems, battery packs, and methods of operation of the same |
| US12149110B2 (en) * | 2021-10-14 | 2024-11-19 | Arm Limited | Battery cell monitoring systems, battery packs, and methods of operation of the same |
| CN115372825A (en) * | 2022-08-10 | 2022-11-22 | 安徽卓越电气有限公司 | Single voltage and single temperature composite acquisition circuit of explosion-proof battery system and data sequencing control method thereof |
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Effective date of registration: 20241212 Address after: 239000 intersection of huangqinghu road and Yuanshan Road, Nanqiao District, Chuzhou City, Anhui Province Patentee after: Anhui liweineng Power Battery Co.,Ltd. Country or region after: China Address before: 315176 238 Yunlin Middle Road, Wang Chun Industrial Park, Ningbo, Zhejiang Patentee before: EVPS NINGBO ENERGY STORAGE SYSTEM CO.,LTD. Country or region before: China |