Multi-module sampling harness connection method and application device thereof

Abstract

The present application provides a multi-module sampling harness connection method and its application device, the method samples multiple battery modules of a battery pack through a collector, the battery pack includes at least two battery modules, the number of collectors is at least two, the collector includes at least one acquisition chip, and the collector is connected to the battery module through a sampling harness; the method includes: obtaining the number of battery cell strings M of the battery cell module and the number of channels N of the acquisition chip; if the number of battery cell strings M and the number of channels N of the acquisition chip meet predetermined conditions; according to the number of channels of the collector and the number of battery cell strings of the battery cell module, cross-chip sampling is performed between the battery cell module and the collector. The present application performs cross-chip sampling between the battery cell module and the collector when the number of battery cell strings M and the number of channels N of the acquisition chip meet predetermined conditions, so that the collector channel and the sampling harness are compatible, and the risk of burning the sampling harness and the collector due to installation errors is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of sampling harnesses, and in particular to a method for connecting a multi-module sampling harness and an application device thereof. Background Art

[0002] The sampling harness is a cable or wire system used to monitor and manage the voltage, current, temperature and other parameters of each battery cell in the battery pack. Through these harnesses, the battery management system (BMS) can obtain the operating status of the battery in real time, so as to effectively manage and protect it and ensure the safety and performance of the battery.

[0003] The battery includes multiple cell modules, and the collector is connected to the cell modules through a sampling harness. If the sampling channel of the cell module is inconsistent with the channel of the collector, sampling harnesses of different specifications are required to match them. During assembly, sampling harnesses of different specifications are difficult to distinguish in appearance. If installed incorrectly, the sampling harness and collector will be burned.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0005] The present application provides a multi-module sampling harness connection method and an application device thereof, which are used to solve the problem of inconsistency between the sampling channel of the battery cell module and the channel of the collector.

[0006] In a first aspect, the present application provides a multi-module sampling harness connection method, wherein a plurality of battery cell modules of a battery pack are sampled through a collector, wherein the battery pack includes at least two battery cell modules, the number of collectors is at least two, the collector includes at least one acquisition chip, and the collector is connected to the battery cell module through a sampling harness; the method comprises:

[0007] Get the number of cell strings M of the cell module and the number of channels N of the acquisition chip;

[0008] If the number of battery cell strings M and the number of channels N of the acquisition chip meet the predetermined conditions, cross-chip sampling is performed between the battery cell module and the collector according to the number of channels of the acquisition chip and the number of battery cell strings of the battery cell module.

[0009] In one of the embodiments, a transfer line is provided between the collector and the sampling harness, and the transfer line is used to connect the collector and the sampling harness.

[0010] In one embodiment, the battery pack includes a first battery cell module and a second battery cell module, and the first collector and the second collector sample the first battery cell module and the second battery cell module respectively;

[0011] Accordingly, if the number of cell strings M and the number of channels N of the acquisition chip meet the predetermined conditions, cross-chip sampling is performed between the cell module and the collector according to the number of channels of the acquisition chip and the number of cell strings of the cell module, specifically including:

[0012] The first collector is controlled to be connected to the first battery cell module, the first collector is controlled to be connected to the second battery cell module, and the second collector is controlled to be connected to the second battery cell module.

[0013] In one embodiment, the number of acquisition chips of the first collector is ([M / N]+1), the number of acquisition chips of the second collector is [M / N], and the number of channels connecting the first collector and the second battery module is N*([M / N]+1)-M.

[0014] In one embodiment, the number of battery cell strings M and the number of channels N of the acquisition chip meet predetermined conditions, including:

[0015] The predetermined condition is that the remainder of the number of cell strings M divided by the number of channels N of the acquisition chip is less than or equal to N / 2.

[0016] In one embodiment, the method further comprises:

[0017] If the remainder of the number of battery cell strings M divided by the number of channels N of the acquisition chip is greater than N / 2, a single battery cell module and a single collector are connected one-to-one.

[0018] In one embodiment, the method includes:

[0019] Get the number of acquisition chips in the collector. The number of acquisition chips in the collector is ([M / N]+1);

[0020] The number of collectors in the collector corresponds one to one with the number of battery cell modules.

[0021] In one of the embodiments, the sampling harness is one of an FPC sampling harness, an FFC sampling harness and an FDC sampling harness.

[0022] In a second aspect, the present application further proposes a sampling harness, which is used to connect a collector and a cell module, and is used to execute any of the above-mentioned multi-module sampling harness connection methods.

[0023] In a third aspect, the present application also provides a sampling system, including a collector and a sampling harness, the sampling harness is used to connect the collector and the battery cell module, and the connection method between the collector and the battery cell module is such as any of the above-mentioned multi-module sampling harness connection methods.

[0024] In a fourth aspect, the present application provides a battery pack, including any of the multi-module sampling harness connection methods described above.

[0025] In a fifth aspect, the present application provides an electronic device, comprising the battery management system as described above.

[0026] In a sixth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement any of the above-mentioned multi-module sampling harness connection methods.

[0027] In a seventh aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-mentioned multi-module sampling harness connection methods.

[0028] The present application provides a multi-module sampling harness connection method, in which a plurality of battery cell modules of a battery pack are sampled through a collector, the battery pack includes at least two battery cell modules, the number of collectors is at least two, the collector includes at least one acquisition chip, and the collector is connected to the battery cell module through a sampling harness; the method includes: obtaining the number of battery cell strings M of the battery cell module and the number of channels N of the acquisition chip; if the number of battery cell strings M and the number of channels N of the acquisition chip meet predetermined conditions; according to the number of channels of the acquisition chip and the number of battery cell strings of the battery cell module, cross-chip sampling is performed between the battery cell module and the collector. The present application performs cross-chip sampling between the battery cell module and the collector when the number of battery cell strings M and the number of channels N of the acquisition chip meet predetermined conditions, so that the collector channel and the sampling harness are compatible, and the risk of burning the sampling harness and the collector due to installation errors is prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0030] Figure 1 A flowchart of a multi-module sampling harness connection method provided in one embodiment of the present application;

[0031] Figure 2 A schematic diagram of the connection between a collector and a battery cell module provided in an embodiment of the present application;

[0032] Figure 3 A flowchart of a multi-module sampling harness connection method provided in one embodiment of the present application;

[0033] Figure 4 A schematic diagram of the structure of a battery management system provided in one embodiment of the present application.

[0034] Reference numerals:

[0035] 211, first collector; 212, second collector; 221, first battery cell module; 222, second battery cell module; 230, sampling harness; 241, first adapter cable; 242, second adapter cable.

[0036] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0038] The sampling harness is a cable or wire system used to monitor and manage the voltage, current, temperature and other parameters of each battery cell in the battery pack. Through these harnesses, the battery management system (BMS) can obtain the operating status of the battery in real time, so as to effectively manage and protect it and ensure the safety and performance of the battery. The battery includes multiple cell modules, and the collector is connected to the cell module through the sampling harness. If the sampling channel of the cell module is inconsistent with the channel of the collector, sampling harnesses of different specifications are required to match them. During assembly, sampling harnesses of different specifications are difficult to distinguish in appearance. If installed incorrectly, the sampling harness and collector will be burned.

[0039] Figure 1 This is a flowchart of a multi-module sampling harness connection method provided in one embodiment of the present application. Figure 1 As shown, the present application provides a multi-module sampling harness connection method, wherein a plurality of battery cell modules of a battery pack are sampled through a collector, the battery pack includes at least two battery cell modules, the number of collectors is at least two, the collector includes at least one acquisition chip, and the collector is connected to the battery cell module through a sampling harness; the method comprises the following steps:

[0040] Step S102, obtaining the number M of battery cell strings of the battery cell module and the number N of channels of the acquisition chip.

[0041] Specifically, each channel in the collector collects data from a cell in the battery pack to monitor the voltage and other data of the cell. The battery pack includes multiple cell modules, and the cell modules use cells connected in series to achieve the voltage and capacity required by the device. The number of channels of the acquisition chip is the number of input channels included in the acquisition chip. The number of cell modules is consistent with the number of collectors. If the number of cell strings in the cell module is inconsistent with the number of channels in the collector, the collector may not be able to monitor all the cells in the cell module.

[0042] Step S104: if the number of battery cell strings M and the number of channels N of the acquisition chip meet a predetermined condition, cross-chip sampling is performed between the battery cell module and the collector according to the number of channels of the acquisition chip and the number of battery cell strings of the battery cell module.

[0043] Specifically, cross-chip sampling is performed between the cell module and the collector according to the number of channels of the acquisition chip and the number of cell strings in the cell module. It can be understood that if a single collector cannot cover the cells in the cell module, the collector is required to perform cross-chip sampling and use the channel of another collector to sample the cell module, thereby achieving comprehensive monitoring of the battery pack.

[0044] When the number of battery cell strings M and the number of channels N of the acquisition chip meet predetermined conditions, the present application performs cross-chip sampling between the battery cell module and the collector, so that the collector channel and the sampling harness are compatible, thereby preventing the risk of burning the sampling harness and the collector due to installation errors; the reliability and fault tolerance of the system can be improved.

[0045] In one of the embodiments, in one of the embodiments, a switching line is provided between the collector and the sampling harness, and the switching line is used to connect the collector and the sampling harness.

[0046] In one embodiment, a battery pack includes two battery cell modules, and the specifications of the sampling harness connected to the first battery cell module and the second battery cell module are consistent. If each battery cell module includes 21S batteries, that is, the number of battery cell strings in each battery cell module is 21, M=21, and the acquisition chip of the collector adopts 16S, that is, N=16, then each battery cell module needs to be configured with 2 16S collectors to complete the comprehensive monitoring of the battery pack, but the acquisition chip will cause idle channels, the channel utilization rate is very low, and the use of a large number of collectors will increase the cost and area.

[0047] In one embodiment, the battery pack includes a first battery cell module and a second battery cell module, and the first collector and the second collector sample the first battery cell module and the second battery cell module respectively; accordingly, if the number of battery cell strings M and the number of channels N of the acquisition chip meet predetermined conditions; according to the number of channels of the acquisition chip and the number of battery cell strings of the battery cell module, cross-chip sampling is performed between the battery cell module and the collector, specifically including:

[0048] The first collector is controlled to be connected to the first battery cell module, the first collector is controlled to be connected to the second battery cell module, and the second collector is controlled to be connected to the second battery cell module.

[0049] In one embodiment, the number of acquisition chips of the first collector is ([M / N]+1), the number of acquisition chips of the second collector is [M / N], and the number of channels connecting the first collector and the second battery module is N*([M / N]+1)-M.

[0050] In one embodiment, the number of battery cell strings M and the number of channels N of the acquisition chip meet a predetermined condition, specifically including: the predetermined condition is that the remainder of the number of battery cell strings M divided by the number of channels N of the acquisition chip is less than or equal to N / 2.

[0051] Specifically, Figure 2 As shown, Figure 2 A schematic diagram of the connection between a collector and a battery cell module provided in an embodiment of the present application. A first collector 211 and a second collector 212, the battery pack includes a first battery cell module 221 and a second battery cell module 222, and the collector is connected to the battery cell module through a sampling harness 230 to monitor parameters such as voltage, current and temperature of the battery cell module. In an embodiment of the present application, the sampling harness 230 connected to the first battery cell module 221 and the second battery cell module 222 has the same specifications. The adapter cable includes a first adapter cable and a second adapter cable, the first collector is connected to the first battery cell module through the first adapter cable, the first collector is connected to the second battery cell module through the first adapter cable, and the second sample module is connected to the second battery cell module through the second adapter cable.

[0052] In the battery management system (BMS), the number of channels of the acquisition chip on the collector (such as 12S, 14S, 16S, 32S, etc.) indicates the number of series-connected cells that the chip can monitor. The following are some common acquisition chip channel configurations: 12S acquisition chips can monitor up to 12 series-connected cells; 14S acquisition chips can monitor up to 14 series-connected cells; 16S acquisition chips can monitor up to 16 series-connected cells; 32S acquisition chips can monitor up to 32 series-connected cells. The choice of the number of acquisition chip channels depends on the specific application requirements and design requirements. For electric vehicles, high voltage and large-capacity battery packs are usually required, so 16S or 32S acquisition chips may be used; for energy storage systems, similar to electric vehicles, high voltage and large capacity are also required, and 16S or 32S acquisition chips may be used; for electric bicycles and electric tools, smaller battery packs are usually used, and 12S or 14S acquisition chips may be used. At the same time, the choice of the number of acquisition chip channels also depends on the cost and design complexity. Therefore, this application does not limit the selection of the number of acquisition chip channels in the collector.

[0053] In one of the embodiments, the value range of the number M of battery cells in the battery cell module is 14S < M ≤ 21S.

[0054] In one embodiment, the number of cells in the cell module is M, the number of chip channels used is N, and a battery pack includes multiple cell modules. When the remainder of the number of cell strings M divided by the number of channels N of the acquisition chip is less than or equal to N / 2, When , the number of acquisition chips in the first collector 211 is ([M / N]+1), and the number of acquisition chips in the second collector 212 is [M / N], wherein the sampling harness 230 connected to the battery module is a compatible design, that is, the specifications of the sampling harness 230 are consistent. For example, Figure 2 As shown, there are 2 battery modules in a battery pack, the number of battery strings of each battery module is M=16, the number of channels of the acquisition chip is N=12, N / 2=6, M%N=4, then the predetermined condition is met, the number of acquisition chips in the first collector 211 is: [M / N]+1=2, and the number of acquisition chips in the second collector 212 is: [M / N]=1. The number of channels of the first collector 211 is 24, and the number of channels of the second collector 212 is 12. After the first collector 211 collects the first battery module 221, the number of channels is 8. The number of channels of the second collector 212 cannot completely cover the batteries of the second battery module 222. Therefore, the remaining channels of the first collector 211 are controlled to be connected to the second battery module 222, so that the second battery module 222 can be fully monitored, while increasing the channel utilization of the acquisition chip.

[0055] In one embodiment, if there are 3 battery cell modules in a battery pack, the collector includes three collectors, where the number of battery cell strings in the battery cell module is M=16, the number of channels of the collection chip is N=12, N / 2=6, and M%N=4, then the predetermined condition is met, and the number of collection chips in the first collector 211 is: [M / N]+1=2, the number of collection chips in the second collector 212 is: [M / N]=1, and the number of collection chips in the third collector is: [M / N]=1. The number of channels of the first collector 211 is 24, the number of channels of the second collector 212 is 12, and the number of channels of the third collector is 12. After the first collector 211 collects the first battery cell module 221, the number of channels is 8 remaining. The number of channels of the second collector 212 cannot completely cover the battery cells of the second battery cell module 222, and the number of channels of the third collector cannot completely cover the battery cells of the third battery cell module. Therefore, the remaining 4 channels of the first collector 211 are controlled to be connected to the second battery cell module 222, and the other 4 channels are connected to the third battery cell module, so that the second battery cell module 222 and the third battery cell module can be fully monitored, while increasing the channel utilization rate of the acquisition chip.

[0056] In one of the embodiments, the sampling harness 230 is designed to be compatible. For example, a battery pack includes two battery cell modules, the number of strings of each battery cell module is 21S (where 16S< M ≤ 21S), the number of channels of the acquisition chip is 16S, the first collector 211 in the collector is 32S (2 acquisition chips) and the second collector 212 is 16S (1 acquisition chip), if the connector of the sampling harness 230 is selected as 32pin. The sampling harness 230 interfaces of the two modules are the same, and the adapter cable will select the interface to the corresponding collector. The first adapter cable 241 is connected to the first collector 211, and the second adapter cable 242 is connected to the second collector 212. The compatible design of the sampling harness 230 is shown in Table 1 below. The sampling harness 230 designed in this embodiment can also be applied to odd-numbered groups in multi-battery cell modules.

[0057] Table 1 Compatible design of sampling harness pins

[0058]

[0059] In one embodiment, the sampling harness 230 is designed to be compatible. For example, a battery pack includes two battery cell modules, each battery cell module has a string number of 20S (where 14S < M ≤ 21S), the number of channels of the acquisition chip is 14S, the first collector 211 in the collector is 28S (2 acquisition chips) and the second collector 212 is 14S (1 acquisition chip), if the connector of the sampling harness 230 is selected as 32pin. The sampling harness 230 interfaces of the two modules are the same, and the adapter will select the interface to the corresponding collector. The first adapter 241 is connected to the first collector 211, and the second adapter 242 is connected to the second collector 212. The compatible design of the sampling harness 230 is shown in Table 2 below.

[0060] Table 2 Compatible design of the pins of the sampling harness 230

[0061]

[0062] In one embodiment, the method further comprises:

[0063] If the number of battery cell strings M and the number of channels N of the acquisition chip cannot meet the predetermined conditions, a single battery cell module and a single collector are connected one-to-one.

[0064] In one of the embodiments, the method includes: obtaining the number of acquisition chips in the collector, the number of acquisition chips in the collector is ([M / N]+1); the number of collectors in the collector corresponds one-to-one to the number of battery cell modules.

[0065] Specifically, when the remainder of the number of battery cell strings M divided by the number of channels N of the acquisition chip is greater than N / 2, that is, M%N is greater than N / 2, the number of chips of the first collector 211 is [M / N]+1, and one sampling harness 230 manages one battery cell module. In one embodiment, a collector with multiple chips can also be used, where the number of acquisition chips in the collector is 2*([M / N]+1). In one embodiment, multiple collectors can also be used, and the number of acquisition chips in the collector is [M / N]+1. For example, a battery pack contains two cell modules, each of which has 19 cell strings and N=12 channels of the acquisition chip, then N / 2=6, M%N=7, M%N>N / 2, the number of chips in the first collector 211 is [M / N]+1=2, and the number of chips in the second collector 212 is [M / N]+1=2; therefore, the number of channels in the first collector 211 is 24, and the number of channels in the second collector 212 is 24. Each collector, a sampling harness 230 and a cell module correspond one to one, and cross-chip sampling is not required.

[0066] In one embodiment, the sampling harness 230 is one of an FPC sampling harness 230 , an FFC sampling harness 230 , and an FDC sampling harness 230 .

[0067] Figure 3 This is a flowchart of a method for connecting a multi-module sampling harness 230 provided in an embodiment of the present application. Figure 3 As shown, the present application provides a method for connecting a multi-module sampling harness 230, wherein the battery pack includes at least two battery modules, the collector includes at least two collectors, and the collector includes at least one collection chip, and the collector is connected to the battery module through the sampling harness 230; the method comprises the following steps:

[0068] Step S102, obtaining the number M of battery cell strings of the battery cell module and the number N of channels of the acquisition chip.

[0069] Step S104: If the number of battery cell strings M and the number of channels N of the acquisition chip meet predetermined conditions.

[0070] Step S105 : performing cross-chip sampling between the cell module and the collector according to the number of channels of the collector and the number of cell strings of the cell module.

[0071] Step S106: There is no need to perform cross-chip sampling between the battery cell module and the collector.

[0072] The present application also proposes a sampling harness, which is used to connect a collector and a battery cell module, and is used to execute any of the above-mentioned multi-module sampling harness connection methods.

[0073] The present application also provides a sampling system, including a collector and a sampling harness, the sampling harness is used to connect the collector and the battery cell module, and the connection method between the collector and the battery cell module is such as any of the above-mentioned multi-module sampling harness connection methods.

[0074] The present application provides a battery pack, including any of the above-mentioned multi-module sampling harness connection methods.

[0075] like Figure 4 As shown, Figure 4 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application. The present application provides a battery pack 500, including: a memory 502, a processor 501;

[0076] Memory stores computer-executable instructions;

[0077] The processor executes the computer-executable instructions stored in the memory, so that the processor executes any of the above-mentioned multi-module sampling harness connection methods.

[0078] The present application provides an electronic device, comprising the battery management system as described above.

[0079] The present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement any of the above-mentioned multi-module sampling harness connection methods.

[0080] The present application provides a computer program product, including a computer program, which implements any of the above-mentioned multi-module sampling harness 230 connection methods when executed by a processor.

[0081] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0082] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A multi-module sampling harness connection method, which samples multiple battery modules of a battery pack through a collector, characterized in that: The battery pack includes at least two battery cell modules, the number of the collectors is at least two, the collectors include at least one collection chip, and the collectors are connected to the battery cell modules through a sampling harness; the method includes: Obtain the number of cell strings M of the cell module and the number of channels N of the acquisition chip; If the number of cell strings M and the number of channels N of the acquisition chip meet a predetermined condition; cross-chip sampling is performed between the cell module and the collector according to the number of channels of the acquisition chip and the number of cell strings of the cell module; The battery pack includes a first battery cell module and a second battery cell module, and the first collector and the second collector respectively sample the first battery cell module and the second battery cell module; Correspondingly, if the number of cell strings M and the number of channels N of the acquisition chip meet a predetermined condition; according to the number of channels of the acquisition chip and the number of cell strings of the cell module, cross-chip sampling is performed between the cell module and the collector, specifically including: Controlling the first collector to be connected to the first battery cell module, the first collector to be connected to the second battery cell module, and the second collector to be connected to the second battery cell module; The number of battery cell strings M and the number of channels N of the acquisition chip meet predetermined conditions, specifically including: The predetermined condition is that the remainder of the number of cell strings M divided by the number of channels N of the acquisition chip is less than or equal to N / 2.

2. The multi-module sampling harness connection method according to claim 1, characterized in that: A transfer line is provided between the collector and the sampling harness, and the transfer line is used to connect the collector and the sampling harness.

3. The multi-module sampling harness connection method according to claim 1, characterized in that: The number of acquisition chips of the first collector is ([M / N]+1), the number of acquisition chips of the second collector is [M / N], and the number of channels connecting the first collector and the second battery module is N ([M / N]+1)-M.

4. The multi-module sampling harness connection method according to claim 1, characterized in that: The method further comprises: If the remainder of the number of battery cell strings M divided by the number of channels N of the acquisition chip is greater than N / 2, a single battery cell module and a single collector are connected in a one-to-one correspondence.

5. The multi-module sampling harness connection method according to claim 4, characterized in that: The method comprises: When the remainder of the number of battery cell strings M divided by the number of channels N of the acquisition chip is greater than N / 2, the number of acquisition chips in the collector is ([M / N]+1); The number of the collectors corresponds one to one to the number of the battery cell modules.

6. The multi-module sampling harness connection method according to claim 1, characterized in that: The sampling harness is one of an FPC sampling harness, an FFC sampling harness and an FDC sampling harness.

7. A sampling system, characterized in that: It comprises a collector and a sampling harness, wherein the sampling harness is used to connect the collector and the battery cell module, and the connection method between the collector and the battery cell module is the multi-module sampling harness connection method as described in any one of claims 1-6.

8. A battery pack, characterized in that: Comprising a sampling system as claimed in claim 7.

9. An electronic device, characterized in that: Comprising the battery pack as claimed in claim 8.

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