WO2024159740A1 - 一种电池模组及其信号采集板 - Google Patents

一种电池模组及其信号采集板 Download PDF

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Publication number
WO2024159740A1
WO2024159740A1 PCT/CN2023/114923 CN2023114923W WO2024159740A1 WO 2024159740 A1 WO2024159740 A1 WO 2024159740A1 CN 2023114923 W CN2023114923 W CN 2023114923W WO 2024159740 A1 WO2024159740 A1 WO 2024159740A1
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WIPO (PCT)
Prior art keywords
battery module
acquisition
board
connector
temperature sensor
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PCT/CN2023/114923
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English (en)
French (fr)
Inventor
刘浩武
陈飞
王林
赵耀
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Sungrow Power Supply Co Ltd
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Sungrow Power Supply Co Ltd
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Publication of WO2024159740A1 publication Critical patent/WO2024159740A1/zh
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte

Definitions

  • the present application relates to the field of power electronics technology, and in particular to a battery module and a signal acquisition board thereof.
  • the energy storage industry is developing rapidly. An important branch of its application in the power system is centralized energy storage. Since centralized energy storage equipment has a high energy density and safety is very important, it is necessary to implement close status monitoring measures on the operating parameters such as voltage, temperature, and humidity of centralized energy storage equipment to ensure the safety and reliability of the equipment.
  • the voltage data of each battery cell in the lithium battery module can be sampled, and the humidity sampling is often integrated in the sensor in the container or the control board of the battery pack PACK.
  • the temperature collection is often only selected from the key parts in the PACK. As the regulatory agencies and users gradually increase the requirements for the safety of energy storage equipment operation, the full battery cell temperature collection solution, that is, the temperature detection of all battery cells, has become a necessary direction.
  • the present application provides a battery module and a signal acquisition board thereof to realize the collection of voltage and temperature of all battery cells in a PACK.
  • the present application provides a signal acquisition board for a battery module, comprising: a substrate, and a connector and N acquisition modules arranged on the substrate; wherein N is the number of cells connected in series in the battery module;
  • the acquisition module includes: a voltage acquisition terminal, a temperature sensor and a current limiting resistor;
  • the two ends of the voltage acquisition terminal are respectively connected to the corresponding voltage acquisition interface in the corresponding battery cell and the connector, the temperature sensor is arranged on the voltage acquisition terminal, one end of the temperature sensor is connected to the corresponding temperature acquisition interface in the connector, and the other end of the temperature sensor is connected to the ground interface in the connector through the current limiting resistor.
  • each of the current limiting resistors is connected in parallel to the ground interface through a ground loop.
  • the ground wire loop is further provided with: a fuse device connected to the ground wire interface.
  • the number of the ground wire interfaces is greater than 1.
  • the resistance of the current limiting resistor is in the kilo-ohm range.
  • the substrate is a flexible printed circuit (FPC).
  • FPC flexible printed circuit
  • the temperature sensor is a negative temperature coefficient (NTC) temperature sensing resistor.
  • NTC negative temperature coefficient
  • the voltage collection terminal is a hollow structure, and the temperature sensor is arranged in the hollow part of the voltage collection terminal.
  • the voltage collection terminal is a nickel sheet.
  • a second aspect of the present application provides a battery module, comprising: N battery cells connected in series, a signal processing board, and a signal acquisition board of the battery module as described in any one of the first aspects above; wherein N is a positive integer;
  • the signal acquisition board is connected to each of the battery cells;
  • the signal acquisition board is connected to the signal processing board via its own connector.
  • the signal processing board is provided with: N temperature sensing signal processing circuits;
  • Each of the temperature sensing signal processing circuits is respectively connected to the temperature acquisition interface in the connector;
  • the ground wire interface in the connector is grounded through the signal processing board.
  • the signal processing board is further provided with: N transient diodes TVS, which are respectively arranged between the corresponding temperature sensing signal processing circuit and the ground.
  • the signal acquisition board of the battery module provided in the present application is provided with a corresponding acquisition module for each battery cell of the battery module on the substrate; in each acquisition module, the two ends of its voltage acquisition terminal are respectively connected to the corresponding battery cell and the corresponding voltage acquisition interface in the connector on the substrate, so as to realize the voltage acquisition of the corresponding battery cell; and a temperature sensor is provided on the voltage acquisition terminal, and is connected to the corresponding temperature acquisition interface in the connector through the temperature sensor, so as to realize the temperature acquisition of the connected battery cell by utilizing the thermal conductivity of the corresponding voltage acquisition terminal; and the other end of the temperature sensor is also connected to the ground interface in the connector through a current limiting resistor, so as to effectively suppress the current when a short circuit fault occurs between the voltage acquisition terminal and the temperature sensor.
  • FIG1 is a schematic diagram of the structure of a signal acquisition board of a battery module provided in an embodiment of the present application
  • FIG2 is another schematic diagram of the structure of the signal acquisition board of the battery module provided in an embodiment of the present application.
  • FIG3 is another structural schematic diagram of a signal acquisition board of a battery module provided in an embodiment of the present application.
  • FIG4 is another schematic diagram of the structure of the signal acquisition board of the battery module provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of the layout structure of a signal acquisition board of a battery module provided in an embodiment of the present application.
  • FIG6 is a schematic diagram showing the connection relationship between the signal acquisition board and the signal processing board of the battery module provided in an embodiment of the present application.
  • the present application provides a signal acquisition board for a battery module to realize the acquisition of voltage and temperature of all battery cells in a PACK.
  • the signal acquisition board of the battery module comprises: a substrate 10, and a connector 12 and N acquisition modules 11 arranged on the substrate 10; wherein N is the number of battery cells in series in the battery module, that is, there are N battery cells connected in series in the battery module, such as Cell_1, Cell_2...Cell_N as shown in FIG1 ; N is a positive integer; and a PACK includes at least one battery module.
  • the acquisition module 11 includes: a voltage acquisition terminal 101, a temperature sensor 102 and a current limiting resistor 103; and, in each acquisition module 11:
  • One end of the voltage collection terminal 101 is connected to the positive electrode of the corresponding battery cell, and the other end is connected to the corresponding voltage collection interface in the connector 12 through a voltage collection line to realize voltage collection of the corresponding battery cell.
  • the temperature sensor 102 is disposed on the voltage collection terminal 101 , and specifically may be disposed in the center of the voltage collection terminal 101 .
  • One end of the temperature sensor 102 is connected to the corresponding temperature acquisition interface in the connector 12 through a temperature acquisition line, and the other end of the temperature sensor 102 is connected to the ground interface in the connector 12 through a current limiting resistor 103, so as to achieve grounding through the external connection of the connector 12; thereby, the temperature sensor 102 can utilize the thermal conductivity of the corresponding voltage acquisition terminal 101 to achieve temperature acquisition of the battery cell connected to the corresponding voltage acquisition terminal 101.
  • one end of the current limiting resistor 103 is connected to the ground wire on the substrate 10, and the other end is connected to the temperature sensor 102.
  • the other end of the temperature sensor 102 is directly connected to the connector 12, thereby effectively suppressing the overcurrent generated when the voltage collection terminal 101 and the temperature sensor 102 are short-circuited.
  • the current can also be effectively suppressed, and the capacitive current is converted into resistive-capacitive current, effectively preventing the occurrence of arcing and sparking inside.
  • the signal acquisition board of the battery module provided in this embodiment can not only realize the voltage acquisition of all the cells in the battery module, but also realize the temperature acquisition of all the cells in the battery module; moreover, through the setting of the current limiting resistor 103, the current can also be effectively suppressed when a short circuit fault occurs between the voltage acquisition terminal 101 and the temperature sensor 102.
  • each current limiting resistor 103 is connected in parallel to the ground interface through a ground loop.
  • the signal acquisition board can effectively reduce the layout of the wiring harness while realizing the collection of all battery cell voltages and temperatures, thereby saving area to the greatest extent and achieving effective space savings; moreover, the sharing and reduction of ground wires can simplify the wiring on the substrate 10, greatly saving labor and avoiding the influence of wiring harness stress on the battery module.
  • the number of ground interfaces on the substrate 10 may be 1 as shown in FIG. 1 and FIG. 2 ; further, the number of ground interfaces on the substrate 10 may also be set to be greater than 1, as shown in FIG. 3
  • Two ground wire interfaces are used as an example for demonstration. In actual applications, the number of ground wire interfaces can also take other values, depending on the specific application environment, all of which are within the protection scope of this application.
  • the ground loop includes: a collection part (the leftmost vertical line in the figure) that enables each current limiting resistor 103 to be connected in parallel, and two main ground wires that connect the collection part to the corresponding ground interface.
  • the two main ground wires are connected to the connector 12, and then form a loop through the external connection of the connector 12; the ground connection is a loop, which can effectively improve the reliability of the system.
  • the ground wire loop is further provided with: a fuse device 13 connected to the ground wire interface; the fuse device 13 may specifically be a protective fuse.
  • a fuse device 13 is added at the interface between the sampling point and the ground wire to prevent the battery cell from being short-circuited through the voltage acquisition terminal 101 , thereby realizing a protection function.
  • a fuse device 13 is added at the port of the main ground line.
  • the fuse can be blown in time to protect the PACK.
  • the main ground line potential will be the same as the short-circuit voltage collection terminal 101.
  • a grounded TVS Transient Voltage Suppressor
  • the main ground line can pass through the current limiting resistor 103 and the temperature sensor 102 and then through the TVS to the main ground, which effectively avoids the danger caused by overcurrent heating.
  • the resistance of the current limiting resistor 103 is in the kilo-ohm range, such as 5K ohms, and the current limiting resistor 103 can specifically be a chip resistor.
  • adding a kilo-ohm chip resistor at the connection between the temperature sensor 102 and its negative electrode line can effectively prevent the overcurrent generated when the voltage collection terminal 101 and the negative electrode of the temperature sensor 102 are short-circuited, thereby avoiding the risk of arcing; at the same time, when any temperature sensor 102 is short-circuited with the corresponding battery cell electrode through the voltage collection terminal 101, due to the presence of the current limiting resistor 103, the capacitive current can be converted into a resistive-capacitive current, thereby effectively preventing the occurrence of internal arcing and sparking.
  • the substrate 10 may be an FPC (Flexible Printed Circuit); the temperature sensor 102 may be an NTC (Negative Temperature Coefficient) temperature-sensitive resistor; and the voltage collection terminal 101 may be a nickel sheet.
  • the voltage collection terminal 101 may be configured as a hollow structure, and the temperature sensor 102 may be configured in the hollow part of the voltage collection terminal 101.
  • the FPC solution is selected in consideration of the limited space in the PACK and the impact of the battery cell pressure relief valve. While the voltage is collected through the nickel sheet, the thermal conductivity of the nickel sheet is fully utilized, and the NTC temperature sensing resistor is arranged in the center of the hollow nickel sheet. The voltage collection nickel sheet is used to achieve rapid heat conduction, effectively achieving the timeliness and accuracy of the temperature collection of all battery cells. At the same time, the NTC temperature sensing resistor collection part does not need to be additionally welded to the electrode, which can effectively reduce the welding points and improve the yield rate of PACK production.
  • FPC is used to sample the voltage and temperature data of each battery cell and positive and negative electrodes in the PACK, and a passive balancing strategy between battery cells can be implemented through the voltage sampling loop.
  • the battery module full-cell temperature detection solution provided in this embodiment uses FPC to realize the voltage and temperature collection solution of all cells in the PACK on the basis of taking into account reliability, safety, thermal stability, economy and versatility.
  • Figure 5 shows the layout of the signal acquisition board that can realize the voltage and temperature sensing acquisition of the entire PACK battery cell, where 201 is the signal acquisition board, 202 is the battery cell aluminum electrode, 203 is the wiring harness adapter board of the signal acquisition board, 101 is the voltage acquisition terminal such as the nickel sheet mentioned above, and 102 is the temperature acquisition component, that is, the temperature sensor mentioned above. It should be noted that Figure 5 is only an example, and the actual layout is not limited to this. The selection of its internal electronic components should consider the appropriate technical parameters, certification categories, and costs to determine the most preferred order.
  • FIG. 6 Another embodiment of the present application further provides a battery module, such as a lithium battery module, as shown in FIG6, comprising: N battery cells connected in series (as shown in the figure Cell_1, Cell_2 ... Cell_N), a signal processing board, and a signal acquisition board of the battery module as described in any of the above embodiments (shown by taking the structure shown in FIG4 as an example); wherein:
  • a battery module such as a lithium battery module, as shown in FIG6, comprising: N battery cells connected in series (as shown in the figure Cell_1, Cell_2 ... Cell_N), a signal processing board, and a signal acquisition board of the battery module as described in any of the above embodiments (shown by taking the structure shown in FIG4 as an example); wherein:
  • N is a positive integer, and its specific value, the actual number of battery cell pole pieces, and the arrangement position are not limited and can be determined according to the application environment.
  • the signal acquisition board is connected to each battery cell; the signal acquisition board is connected to the signal processing board through its own connector 12 .
  • the signal processing board can specifically be a signal processing board of a BMU (Battery Management Unit) arranged inside each battery module; as shown in FIG6 , the signal processing board is provided with: N temperature sensing signal processing circuits 21; each temperature sensing signal processing circuit 21 is respectively connected to a temperature acquisition interface in a connector 12; and a ground wire interface in the connector 12 is grounded through the signal processing board.
  • BMU Battery Management Unit
  • the signal processing board is also provided with: N TVS 22, which are respectively arranged between the corresponding temperature sensing signal processing circuit 21 and the ground.
  • Adding TVS 22 to the signal processing board can prevent the potential difference between the sampling circuits from being too large when the main ground protection fuse blows, thereby affecting other circuits on the signal processing board. Due to the existence of the current limiting resistor 103, it can also effectively suppress the overcurrent generated by the main ground between the various acquisition circuits after the battery cell electrode has a short circuit fault through the nickel sheet.
  • the signal acquisition board and the signal processing board have a comprehensive monitoring and protection mechanism for the PACK, which can effectively improve the stability and reliability of the PACK operation; moreover, the signal acquisition board and the signal processing board meet the IEC and UL safety standards and can meet global delivery needs; in addition, the PACK battery acquisition solution using this design scheme enables the PACK to be compatible with stability, reliability, versatility and economy, which is conducive to promotion.

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Abstract

本申请提供一种电池模组及其信号采集板，该信号采集板中，在基板上为电池模组的各电芯分别设置有相应的采集模块；各采集模块中，其电压采集端子的两端分别连接对应电芯及基板上接插件中的对应电压采集接口，以实现对于对应电芯的电压采集；并且，在电压采集端子上设置有温度传感器，并通过温度传感器连接接插件中的对应温度采集接口，以利用相应电压采集端子的导热能力实现对其所接电芯的温度采集；而且，温度传感器的另一端还通过限流电阻连接接插件中的地线接口，进而在电压采集端子与温度传感器出现短路故障时有效抑制电流。

Description

一种电池模组及其信号采集板
本申请要求于2023年02月02日提交中国专利局、申请号为202320213890.9、发明名称为“一种电池模组及其信号采集板”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电力电子技术领域，特别涉及一种电池模组及其信号采集板。
背景技术
储能行业发展迅速，其在电力系统中应用的一个重要分支为集中式储能形式，由于集中式储能设备的能量密度较高，安全性十分重要，因此需要对集中式储能设备的电压、温度、湿度等运行参数实施密切的状态监控措施，保证设备的安全可靠。
当前，锂电池模组中可以对每一个电芯进行电压数据采样，其湿度采样往往集成在集装箱内的传感器或者电池包PACK的控制板上，然而，对于其温度的采集往往只是选取PACK内的重点部位进行采集。随着监管机构以及用户对储能设备运行安全性要求逐渐的提高，全电芯温度采集方案即对所有电芯进行温度检测的措施，已经成为了必要的方向。
发明内容
本申请提供一种电池模组及其信号采集板，以实现对于PACK内所有电芯的电压以及温度的采集。
为实现上述目的，本申请提供如下技术方案：
本申请第一方面提供了一种电池模组的信号采集板，包括：基板，和，设置于所述基板上的接插件及N个采集模块；其中，N为电池模组中电芯的串联数量；
所述采集模块包括：电压采集端子、温度传感器及限流电阻；
所述采集模块中，所述电压采集端子的两端分别连接对应所述电芯及所述接插件中的对应电压采集接口，所述温度传感器设置于所述电压采集端子上，所述温度传感器的一端连接所述接插件中的对应温度采集接口，所述温度传感器的另一端通过所述限流电阻连接所述接插件中的地线接口。
可选的，各所述限流电阻通过地线环路，并联连接至所述地线接口。
可选的，所述地线环路中还设置有：连接所述地线接口的熔断装置。
可选的，所述地线接口的数量大于1。
可选的，所述限流电阻的阻值为千欧级。
可选的，所述基板为柔性电路板FPC。
可选的，所述温度传感器为负温度系数NTC温感电阻。
可选的，所述电压采集端子为中空结构，所述温度传感器设置于所述电压采集端子的中空部分。
可选的，所述电压采集端子为镍片。
本申请第二方面提供了一种电池模组，包括：N个串联连接的电芯，信号处理板，以及，如上述第一方面任一种所述的电池模组的信号采集板；其中，N为正整数；
所述信号采集板与各所述电芯相连；
所述信号采集板通过自身的接插件，连接所述信号处理板。
可选的，所述信号处理板上设置有：N个温感信号处理电路；
各所述温感信号处理电路分别与所述接插件中的温度采集接口相连；
所述接插件中的地线接口通过所述信号处理板接地。
可选的，所述信号处理板上还设置有：N个瞬态二极管TVS，分别设置于相应所述温感信号处理电路与地之间。
本申请提供的电池模组的信号采集板，其在基板上为电池模组的各电芯分别设置有相应的采集模块；各采集模块中，其电压采集端子的两端分别连接对应电芯及基板上接插件中的对应电压采集接口，以实现对于对应电芯的电压采集；并且，在电压采集端子上设置有温度传感器，并通过温度传感器连接接插件中的对应温度采集接口，以利用相应电压采集端子的导热能力实现对其所接电芯的温度采集；而且，温度传感器的另一端还通过限流电阻连接接插件中的地线接口，进而在电压采集端子与温度传感器出现短路故障时有效抑制电流。
附图说明
为了更清楚地说明本申请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申请的实施例，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，还可以根据提供的附图获得其他的附图。
图1为本申请实施例提供的电池模组的信号采集板的结构示意图；
图2为本申请实施例提供的电池模组的信号采集板的另一结构示意图；
图3为本申请实施例提供的电池模组的信号采集板的另一结构示意图；
图4为本申请实施例提供的电池模组的信号采集板的另一结构示意图；
图5为本申请实施例提供的电池模组的信号采集板的布局结构示意图；
图6为本申请实施例提供的电池模组的信号采集板与信号处理板的连接关系示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，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，都属于本申请保护的范围。
在本申请中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括要素的过程、方法、物品或者设备中还存在另外的相同要素。
本申请提供一种电池模组的信号采集板，以实现对于PACK内所有电芯的电压以及温度的采集。
参见图1，该电池模组的信号采集板，包括：基板10，和，设置于基板10上的接插件12及N个采集模块11；其中，N为电池模组中电芯的串联数量，也即，该电池模组中存在N个串联连接的电芯，如图1中所示的Cell_1、Cell_2…Cell_N；N为正整数；一个PACK内包括至少一个电池模组。
采集模块11包括：电压采集端子101、温度传感器102及限流电阻103；而且，在各采集模块11中：
其电压采集端子101的一端连接对应电芯的正极，另一端通过电压采集线连接接插件12中的对应电压采集接口，以实现对于对应电芯的电压采集。
温度传感器102设置于电压采集端子101上，具体可以是设置于电压采集端子101的中央。
温度传感器102的一端通过温度采集线连接接插件12中的对应温度采集接口，温度传感器102的另一端通过限流电阻103连接接插件12中的地线接口，以通过该接插件12的对外连接实现接地；进而，使温度传感器102可以利用相应电压采集端子101的导热能力，实现对相应电压采集端子101所接电芯的温度采集。
另外，限流电阻103的一端连接基板10上的地线，另一端连接至温度传感器102，温度传感器102的另一端直接连接至接插件12部分，进而可以有效的抑制电压采集端子101与温度传感器102短路时的所产生的过流，同时当任意温度传感器102通过电压采集端子101与对应电芯的极片发生短路时，由于限流电阻103的存在，也可以有效抑制电流，将容性电流转为阻容性电流，有效的防止内部出现拉弧打火的现象。
本实施例提供的该电池模组的信号采集板，不仅可以实现对于电池模组内全电芯的电压采集，也可以实现对于电池模组内全电芯的温度采集；而且，通过限流电阻103的设置，还可以在电压采集端子101与温度传感器102出现短路故障时有效抑制电流。
在上一实施例的基础之上，优选的，如图2所示，该电池模组的信号采集板中，其各限流电阻103通过地线环路，并联连接至地线接口。
此时，该信号采集板可以在实现全部电芯电压、温度采集的同时，有效的减少线束的布置，最大程度的节省面积，实现有效的空间节约；而且，地线的共用与减少，可以简化基板10上的布线，大大的节省人工，也避免线束应力等对电池模组的影响。
实际应用中，该基板10上地线接口的数量可以是图1和图2中所示的1个；更进一步的，该基板10上地线接口的数量也可以设置为大于1，图3中 以两个地线接口为例进行展示，实际应用中地线接口的数量还可以采取其他数值，视其具体的应用环境而定即可，均在本申请的保护范围内。
该基板10上地线接口的对外连接，将使其实现接地。参见图3，该地线环路包括：使各限流电阻103实现并联连接的汇集部分(如图中最左侧的竖直接线)，以及，将该汇集部分接入相应地线接口的两个总地线。这两个总地线接入接插件12，再通过接插件12的对外连接形成回路；地线连接为环路，可以有效提高系统的可靠性。
更为优选的，参见图4，该地线环路中还设置有：连接地线接口的熔断装置13；该熔断装置13具体可以是保护熔丝。
针对基板10上的每一个电压采样回路进行电压采样时，在采样点与地线接口处增加熔断装置13，可以防止电芯通过电压采集端子101短路时，实现保护功能。
在总地线的端口处增加熔断装置13，在电压采集端子101与总地线出现短路故障等类似故障时，可以及时熔断以保护PACK，此时，总地线电位会与短路电压采集端子101等电位，若在接插件12外部所接温感信号处理电路前级设置接地的TVS(Transient Voltage Suppressor，瞬态二极管)，总地线可以通过限流电阻103与温度传感器102后经由TVS到总地，有效的避免了过流发热造成危险。
在上述实施例的基础之上，优选的，该电池模组的信号采集板中，其限流电阻103的阻值为千欧级，比如5K欧姆，且限流电阻103具体可以是贴片电阻。
考虑到温感采样电路与电压采集端子101在受到高温时可能会出现短路故障，在温度传感器102与其负极线路(也即上述实施例中所述的总地线)连接处，增加千欧级贴片电阻，可以有效的防止电压采集端子101与温度传感器102负极短路时所产生的过流，避免出现拉弧的危险；同时，当任意温度传感器102通过电压采集端子101与对应电芯极片发生短路时，由于限流电阻103的存在，可以将容性电流转为阻容性电流，有效的防止内部出现拉弧打火的现象。
实际应用中，该基板10可以为FPC(Flexible Printed Circuit，柔性电路板)；该温度传感器102可以为NTC(Negative Temperature Coefficient，负温度系数)温感电阻；该电压采集端子101可以为镍片。另外，该电压采集端子101可以设置为中空结构，该温度传感器102设置于电压采集端子101的中空部分。
本实施例考虑到PACK内空间有限，并且考虑到了电芯泄压阀的冲击，选取了FPC方案，在通过镍片进行电压采集的同时，充分利用镍片的导热性，将NTC温感电阻布置于中空的镍片中央，通过电压采集镍片实现热量的快速传导，有效的实现了全部电芯温度采集的时效性与精准性；同时NTC温感电阻采集部分无需再额外焊接至极片，可以有效的减少焊接点，实现PACK生产良品率的提高。
另外，采用FPC实现了对PACK内每一个电芯、正负极片的电压和温度数据进行采样，还可以通过电压采样回路实现电芯之间的被动均衡策略。
本实施例提供的上述电池模组全电芯温度检测方案，在兼顾可靠性、安全性、热稳定性、经济性以及通用性的基础上，使用FPC实现了PACK内所有电芯的电压以及温度的采集方案。
图5所示为能够实现PACK全电芯电压温感采集的信号采集板的布置方案，其中，201为信号采集板，202为电芯铝极片，203为信号采集板的线束转接板，101即上文中所述的电压采集端子比如镍片，102为温度采集组件也即上文中所述的温度传感器。需要说明的是，图5仅为一种示例，实际的布置方案并不仅限于此。其内部电子件的选型要考虑合适的技术参数、认证类别、成本，确认最优选的顺序。
本申请另一实施例还提供了一种电池模组，比如锂电池模组，其如图6中所示，包括：N个串联连接的电芯(如图中所示的Cell_1、Cell_2…Cell_N)，信号处理板，以及，如上述任一实施例所述的电池模组的信号采集板(以图4中所示结构为例进行展示)；其中：
N为正整数，其具体取值、实际电芯极片的数量以及布置位置均不做限定，视其应用环境而定即可。
该信号采集板与各电芯相连；该信号采集板通过自身的接插件12，连接信号处理板。
该信号处理板，具体可以是设置于各个电池模组内部的BMU(Battery Management Unit，电池管理单元)的信号处理板；如图6中所示，该信号处理板上设置有：N个温感信号处理电路21；各温感信号处理电路21分别与接插件12中的温度采集接口相连；该接插件12中的地线接口通过该信号处理板接地。
更为优选的，该信号处理板上还设置有：N个TVS 22，分别设置于相应温感信号处理电路21与地之间。
在信号处理板上增加TVS 22，可以防止总地线保护熔丝熔断时，采样电路之间存在电势差过大，而影响到信号处理板上的其他电路。由于限流电阻103的存在，也可以有效的抑制电芯极片通过镍片发生短路故障之后，各采集回路之间通过总地线所产生的过电流。
该信号采集板与信号处理板，对PACK有全面的监控和保护机制，可以有效的提高PACK运行的稳定性与可靠性；而且，该信号采集板与信号处理板满足IEC、UL安规标准，可满足全球发货需要；另外，采用本设计方案的PACK电池采集方案，使得PACK内能够兼容稳定性、可靠性、通用性与经济性，利于推广。
本说明书中的各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处。尤其，对于系统或系统实施例而言，由于其基本相似于方法实施例，所以描述得比较简单，相关之处参见方法实施例的部分说明即可。以上所描述的系统及系统实施例仅仅是示意性的，其中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模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。
专业人员还可以进一步意识到，结合本文中所公开的实施例描述的各示例 的单元及算法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
对所公开的实施例的上述说明，本说明书中各实施例中记载的特征可以相互替换或者组合，使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其它实施例中实现。因此，本申请将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (12)

  1. 一种电池模组的信号采集板，其特征在于，包括：基板，和，设置于所述基板上的接插件及N个采集模块；其中，N为电池模组中电芯的串联数量；
    所述采集模块包括：电压采集端子、温度传感器及限流电阻；
    所述采集模块中，所述电压采集端子的两端分别连接对应所述电芯及所述接插件中的对应电压采集接口，所述温度传感器设置于所述电压采集端子上，所述温度传感器的一端连接所述接插件中的对应温度采集接口，所述温度传感器的另一端通过所述限流电阻连接所述接插件中的地线接口。
  2. 根据权利要求1所述的电池模组的信号采集板，其特征在于，各所述限流电阻通过地线环路，并联连接至所述地线接口。
  3. 根据权利要求2所述的电池模组的信号采集板，其特征在于，所述地线环路中还设置有：连接所述地线接口的熔断装置。
  4. 根据权利要求1所述的电池模组的信号采集板，其特征在于，所述地线接口的数量大于1。
  5. 根据权利要求1至4任一项所述的电池模组的信号采集板，其特征在于，所述限流电阻的阻值为千欧级。
  6. 根据权利要求1至4任一项所述的电池模组的信号采集板，其特征在于，所述基板为柔性电路板FPC。
  7. 根据权利要求1至4任一项所述的电池模组的信号采集板，其特征在于，所述温度传感器为负温度系数NTC温感电阻。
  8. 根据权利要求1至4任一项所述的电池模组的信号采集板，其特征在于，所述电压采集端子为中空结构，所述温度传感器设置于所述电压采集端子的中空部分。
  9. 根据权利要求1至4任一项所述的电池模组的信号采集板，其特征在于，所述电压采集端子为镍片。
  10. 一种电池模组，其特征在于，包括：N个串联连接的电芯，信号处理板，以及，如权利要求1至9任一项所述的电池模组的信号采集板；其中，N为正整数；
    所述信号采集板与各所述电芯相连；
    所述信号采集板通过自身的接插件，连接所述信号处理板。
  11. 根据权利要求10所述的电池模组，其特征在于，所述信号处理板上设置有：N个温感信号处理电路；
    各所述温感信号处理电路分别与所述接插件中的温度采集接口相连；
    所述接插件中的地线接口通过所述信号处理板接地。
  12. 根据权利要求11所述的电池模组，其特征在于，所述信号处理板上还设置有：N个瞬态二极管TVS，分别设置于相应所述温感信号处理电路与地之间。
PCT/CN2023/114923 2023-02-02 2023-08-25 一种电池模组及其信号采集板 Ceased WO2024159740A1 (zh)

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