Self-discharge test system and method for battery cell module

Abstract

The application relates to the technical field of battery cell modules, in particular to a self-discharge test system and method for a battery cell module, which comprises n test modules, each of which comprises an isolation power module, an isolation communication interface and m self-discharge measurement channels; the isolation power module is electrically connected with the m self-discharge measurement channels and the isolation communication interface, and is used for supplying power to the self-discharge measurement channels and the isolation communication interface; the mth self-discharge measurement channel of the nth test module is used for measuring the self-discharge parameter of the nth battery cell in the mth battery cell module, n>=1, m>=1, n and m are positive integers; a main control board is in communication connection with the isolation communication interfaces of the n test modules; and a system power supply supplies power to the main control board and the isolation power modules of the n test modules.

Description

Technical Field

[0001] This invention relates to the field of battery cell module technology, and specifically to a self-discharge testing system and method for battery cell modules. Background Technology

[0002] With the development of the new energy industry, more and more battery cell manufacturers have introduced self-discharge measurement to replace the traditional OCV measurement method in order to improve production efficiency. However, the self-discharge measurement instruments on the market can only measure a single battery cell and cannot measure the self-discharge of each cell in a battery cell module formed by connecting multiple cells in series. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a self-discharge testing system and method for battery cell modules, aiming to solve the problem of the inability to measure the self-discharge of each cell in a battery cell module.

[0004] To achieve the above objectives, the present invention provides a self-discharge testing system for battery cell modules, comprising:

[0005] There are n test modules, each of which includes an isolated power supply module, an isolated communication interface, and m self-discharge measurement channels. The isolated power supply module is electrically connected to the m self-discharge measurement channels and the isolated communication interface to supply power to the self-discharge measurement channels and the isolated communication interface. The m-th self-discharge measurement channel of the n-th test module measures the self-discharge parameters of the n-th cell in the m-th cell module. n≥1, m≥1, and n and m are positive integers.

[0006] The main control board is connected to the isolated communication interfaces of the n test modules.

[0007] The system power supply provides power to the isolated power supply modules of the main control board and the n test modules.

[0008] In some instances, the number of m is 1-4.

[0009] In some instances, the number of n is 1-24.

[0010] To achieve the above objectives, the present invention also provides a self-discharge testing method for a battery cell module, comprising the following steps:

[0011] Step 1: Connect the m-th self-discharge measurement channel of the n-th test module to the n-th cell in the m-th cell module respectively;

[0012] Step 2: The system power supply provides power to the isolated power supply modules of the main control board and n test modules;

[0013] Step 3: n test modules perform self-discharge measurements on n cells in m cell modules respectively, and transmit the measured self-discharge parameters to the main control board through the isolated communication interface.

[0014] The self-discharge testing system and method for battery cell modules described in this invention have the following advantages:

[0015] Since a battery module contains n cells connected in series, n test modules are required. Therefore, the system power supply is provided to the isolated power supply modules of each test module. Simultaneously, the isolated power supply modules of each test module are connected to their respective isolated communication interfaces, ensuring electrical and signal isolation between the n test modules. Furthermore, the m non-isolated self-discharge measurement channels within the same test module are allocated to the m battery modules, and the n cells within the same battery module are allocated to the n electrically isolated test modules. This fully utilizes each test channel of the test modules, achieving self-discharge measurement of the battery modules. Because the self-discharge testing system adopts a modular design, customers can configure the appropriate number of measurement modules according to the actual application requirements of the battery modules. Attached Figure Description

[0016] Figure 1 This is a connection diagram of the self-discharge test system for the battery cell module according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram showing the connection between the test module and the battery cell module in an embodiment of the present invention;

[0018] Figure 3 This is a flowchart illustrating the self-discharge testing method for the battery cell module of the present invention. Detailed Implementation

[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0020] like Figure 1 and Figure 2 As shown, the present invention employs a self-discharge testing system for a battery cell module, comprising:

[0021] There are n test modules, each of which includes an isolated power supply module, an isolated communication interface, and m self-discharge measurement channels. The isolated power supply module is electrically connected to the m self-discharge measurement channels and the isolated communication interface to supply power to the self-discharge measurement channels and the isolated communication interface. The m-th self-discharge measurement channel of the n-th test module measures the self-discharge parameters of the n-th cell in the m-th cell module. n≥1, m≥1, and n and m are positive integers.

[0022] The main control board is connected to the isolated communication interfaces of the n test modules.

[0023] The system power supply provides power to the isolated power supply modules of the main control board and the n test modules.

[0024] Since a battery module contains n cells connected in series, n test modules are required. Therefore, the system power supply is provided to the isolated power supply modules of each test module. Simultaneously, the isolated power supply modules of each test module are connected to their respective isolated communication interfaces, ensuring electrical and signal isolation between the n test modules. Furthermore, the m non-isolated self-discharge measurement channels within the same test module are allocated to the m battery modules, and the n cells within the same battery module are allocated to the n electrically isolated test modules. This fully utilizes each test channel of the test modules, achieving self-discharge measurement of the battery modules. Because the self-discharge testing system adopts a modular design, customers can configure the appropriate number of measurement modules according to the actual application requirements of the battery modules.

[0025] The isolated power supply module is an isolated power supply circuit that electrically isolates the system power supply from the test module, and also electrically isolates the test modules from each other.

[0026] The isolated communication interfaces of each test module can be connected to the main control board via a communication bus.

[0027] The self-discharge isolation channel includes a cell self-discharge measurement circuit. The cell self-discharge is measured by the cell self-discharge measurement circuit, thereby obtaining the cell self-discharge parameters.

[0028] Depending on the number of battery cell modules being tested, the more battery cell modules that need to be measured simultaneously, the more self-discharge measurement channels can be set in the test module. For example, if there is one battery cell module that needs to be measured simultaneously, then each test module includes one self-discharge measurement channel; or, if there are two battery cell modules that need to be measured simultaneously, then each test module includes two self-discharge measurement channels; or, if there are three battery cell modules that need to be measured simultaneously, then each test module includes three self-discharge measurement channels; or, if there are four battery cell modules that need to be measured simultaneously, then each test module includes four self-discharge measurement channels; or, if there are m battery cell modules that need to be measured simultaneously, then each test module includes m self-discharge measurement channels.

[0029] Preferably, taking into account the size, weight, and ease of testing of the machine, in this embodiment, each test module can be selected to include 4 self-discharge measurement channels, and a single test module can simultaneously test the cells in 4 cell modules.

[0030] Depending on the number of cells connected in series in the actual test cell module, the more cells that need to be measured simultaneously, the more test modules can be set accordingly. For example, if each cell module is formed by 1 cell, then there can be 1 test module; if each cell module is formed by 2 cells connected in series, then there can be 2 test modules; if each cell module is formed by 3 cells connected in series, then there can be 3 test modules; and so on; if each cell module is formed by 12 cells connected in series, then there can be 12 test modules; if each cell module is formed by 24 cells connected in series, then there can be 24 test modules; if each cell module is formed by n cells connected in series, then there can be n test modules. Preferably, in this embodiment, the number of test modules can be 1-24.

[0031] For example, a battery cell module is formed by 12 cells connected in series. In order to speed up the self-discharge measurement efficiency, it is necessary to measure the self-discharge of the cells in 4 battery cell modules at the same time. In this case, the user can select 12 test modules with 4 self-discharge measurement channels to form a self-discharge test system to perform self-discharge tests on 4 battery cell modules at the same time, so as to obtain the self-discharge parameters of 4×12 cells at the same time.

[0032] like Figure 3 As shown, the present invention also provides a self-discharge test method for a battery cell module, comprising the following steps:

[0033] Step 1: Connect the m-th self-discharge measurement channel of the n-th test module to the n-th cell in the m-th cell module respectively;

[0034] Step 2: The system power supply provides power to the isolated power supply modules of the main control board and n test modules;

[0035] Step 3: n test modules perform self-discharge measurements on n cells in m cell modules respectively, and transmit the measured self-discharge parameters to the main control board through the isolated communication interface.

[0036] The isolated power supply module of the test module electrically isolates the system power supply from the test module and from the n test modules. By connecting the m-th self-discharge measurement channel of the n-th test module to the n-th cell in the m-th cell module, the self-discharge parameters of the n cells in the m-th cell module can be obtained. The self-discharge parameters are then transmitted to the main control board through the isolated communication interface of this test module to achieve communication isolation.

[0037] In some embodiments, the main control board includes at least one processor and a memory, wherein both the processor and the memory are integrated on a PCB board.

[0038] In some embodiments, the main control board also includes communication components.

[0039] In the specific implementation process, at least one processor executes the computer execution instructions stored in the memory, causing at least one processor to execute the self-discharge test method as described above, and store the self-discharge parameters of each cell obtained through the self-discharge test method.

[0040] The processor can send the stored self-discharge parameters to mobile terminals, such as computers and mobile phones, through communication components, so that users can view the self-discharge parameters of each cell in each cell module.

[0041] Alternatively, in some embodiments, the main control board may also include a display module, through which the processor can display the self-discharge parameters of each cell in each cell module.

[0042] The specific implementation process of the processor can be found in the above method embodiments, and its implementation principle and technical effect are similar, so it will not be repeated here.

[0043] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0044] The memory may include high-speed RAM, and may also include non-volatile storage (NVM), such as at least one disk storage.

[0045] The display module can be an LED screen.

[0046] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A self-discharge testing system for a battery cell module, characterized in that, include: There are n test modules, each including an isolated power supply module, an isolated communication interface, and m self-discharge measurement channels. The isolated power supply module is electrically connected to the m self-discharge measurement channels and the isolated communication interface to supply power to the self-discharge measurement channels and the isolated communication interface. The n test modules are electrically isolated from each other through their respective isolated power supply modules. The m self-discharge measurement channels within each test module are not isolated from each other. The n cells in the same cell module are measured by the n mutually isolated test modules. The m self-discharge measurement channels of each test module are used to measure the cells at the same position in m different cell modules. The m-th self-discharge measurement channel of the n-th test module corresponds to measuring the self-discharge parameter of the n-th cell in the m-th cell module. n≥1, m≥1, and n and m are positive integers. The main control board is connected to the isolated communication interfaces of the n test modules. The system power supply provides power to the isolated power supply modules of the main control board and the n test modules.

2. The self-discharge testing system according to claim 1, characterized in that, The number of m is 1-4.

3. The self-discharge testing system according to claim 1, characterized in that, The number of n ranges from 1 to 24.

4. A test method for a self-discharge test system for a battery cell module as described in any one of claims 1 to 3, characterized in that, Includes the following steps: Step 1: Connect the m-th self-discharge measurement channel of the n-th test module to the n-th cell in the m-th cell module respectively; Step 2: The system power supply provides power to the isolated power supply modules of the main control board and n test modules; Step 3: n test modules perform self-discharge measurements on n cells in m cell modules respectively, and transmit the measured self-discharge parameters to the main control board through the isolated communication interface.

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