A current limit matrix matching method and system for battery testing

Abstract

The present invention provides a current limit matrix matching method and system for battery testing in the field of battery testing technology, the method comprising the following steps: step S10, the middle machine configures a matrix limit table and sets four limit matching modes; step S20, the middle machine periodically obtains voltage and temperature from the lower machine; step S30, the middle machine sets the limit matching modes corresponding to voltage and current respectively based on the configuration instructions sent by the upper machine; step S40, the middle machine automatically matches the current limit from the matrix limit table based on the voltage, temperature and limit matching mode. The advantage of the present invention is that the accuracy of current limit matching is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery testing, and in particular to a current limit matrix matching method and system for battery testing. Background Art

[0002] After the battery is produced, it needs to undergo a series of tests to ensure its performance and safety. In the three-layer battery testing system consisting of an upper computer, a middle computer, and a lower computer, the middle computer periodically obtains test data such as the battery voltage, current, and temperature collected from the lower computer, and the middle computer makes decisions based on the test data obtained.

[0003] In some user testing scenarios, it is necessary to limit the battery charging and discharging current according to the battery voltage and temperature. Before limiting the current, it is necessary to match the corresponding current limit through the voltage and temperature.

[0004] Traditionally, current limit matching is only roughly judged based on experience, resulting in low accuracy of current limit matching. Therefore, how to provide a current limit matrix matching method and system for battery testing to improve the accuracy of current limit matching has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a current limit matrix matching method and system for battery testing, so as to improve the accuracy of current limit matching.

[0006] In a first aspect, the present invention provides a current limit matrix matching method for battery testing, comprising the following steps:

[0007] Step S10: The intermediate computer configures a matrix limit table and sets four limit matching modes;

[0008] Step S20: The intermediate computer periodically obtains voltage and temperature from the lower computer;

[0009] Step S30: The intermediate computer sets the limit matching modes corresponding to the voltage and current respectively based on the configuration instructions sent by the upper computer;

[0010] Step S40: The intermediate machine automatically matches the current limit value from the matrix limit value table based on the voltage, temperature and limit value matching mode.

[0011] Further, in step S10, the matrix limit value table includes a plurality of voltages and temperatures, and each of the voltages and temperatures uniquely corresponds to a current limit value.

[0012] Further, in step S10, the limit matching mode is a left interval, a right interval, a minimum value and a maximum value.

[0013] Further, the left interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the smallest current limit value in the corresponding interval is taken;

[0014] The right interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the largest current limit value in the corresponding interval is taken;

[0015] The minimum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the minimum current limit value within the corresponding interval is taken;

[0016] The maximum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, the maximum current limit value within the corresponding interval is taken.

[0017] Furthermore, the step S20 is specifically as follows:

[0018] The middle computer sets a sampling period, and obtains voltage and temperature from the lower computer at regular intervals based on the sampling period.

[0019] In a second aspect, the present invention provides a current limit matrix matching system for battery testing, comprising the following modules:

[0020] Configuration module, used for configuring a matrix limit table in the intermediate computer and setting four limit matching modes;

[0021] Voltage and temperature acquisition module, used by the intermediate computer to obtain voltage and temperature from the lower computer at regular intervals;

[0022] The limit matching mode setting module is used for the intermediate computer to set the limit matching modes corresponding to the voltage and current respectively based on the configuration instructions sent by the upper computer;

[0023] The current limit matching module is used for the intermediate machine to automatically match the current limit from the matrix limit table based on the voltage, temperature and limit matching mode.

[0024] Furthermore, in the configuration module, the matrix limit value table includes a plurality of voltages and temperatures, and each of the voltages and temperatures uniquely corresponds to a current limit value.

[0025] Furthermore, in the configuration module, the limit matching mode is a left interval, a right interval, a minimum value, and a maximum value.

[0026] Further, the left interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the smallest current limit value in the corresponding interval is taken;

[0027] The right interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the largest current limit value in the corresponding interval is taken;

[0028] The minimum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the minimum current limit value within the corresponding interval is taken;

[0029] The maximum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, the maximum current limit value within the corresponding interval is taken.

[0030] Furthermore, the voltage and temperature acquisition module is specifically used for:

[0031] The middle computer sets a sampling period, and obtains voltage and temperature from the lower computer at regular intervals based on the sampling period.

[0032] The advantages of the present invention are:

[0033] By configuring the matrix limit table, setting four limit matching modes, and setting the limit matching modes corresponding to the voltage and current respectively, and then based on the voltage and temperature obtained by the intermediate computer from the lower computer or BMS at regular intervals, the corresponding limit matching mode is used to automatically match the current limit from the matrix limit table. Compared with the traditional matching based on experience, the accuracy of current limit matching is greatly improved; and the limit matching modes corresponding to the voltage and temperature can be adjusted as needed, thereby greatly improving the flexibility of current limit matching. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0035] Figure 1 The present invention is a flow chart of a current limit matrix matching method for battery testing.

[0036] Figure 2 The present invention is a schematic diagram of the structure of a current limit matrix matching system for battery testing.

[0037] Figure 3 It is a hardware architecture diagram of the present invention. DETAILED DESCRIPTION

[0038] The overall idea of ​​the technical solution in the embodiment of the present application is as follows: the current limit is automatically matched from the matrix limit table through the limit matching mode corresponding to the voltage and temperature to improve the accuracy of the current limit matching.

[0039] Please refer to Figures 1 to 3 As shown, a preferred embodiment of a current limit matrix matching method for battery testing of the present invention comprises the following steps:

[0040] Step S10: The intermediate computer configures a matrix limit table and sets four limit matching modes;

[0041] Step S20: The intermediate computer periodically obtains voltage and temperature from the lower computer or BMS;

[0042] Step S30: The intermediate computer sets the limit matching modes corresponding to the voltage and current respectively based on the configuration instructions sent by the upper computer;

[0043] Step S40: The intermediate machine automatically matches the current limit value from the matrix limit value table based on the voltage, temperature and limit value matching mode.

[0044] In the step S10, the matrix limit value table includes a plurality of voltages and temperatures, and each of the voltages and temperatures uniquely corresponds to a current limit value.

[0045] The matrix limit table is exemplified as follows:

[0046]

[0047] In the step S10, the limit matching mode is a left interval, a right interval, a minimum value, and a maximum value.

[0048] The left interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the smallest current limit value in the corresponding interval is taken;

[0049] The right interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the largest current limit value in the corresponding interval is taken;

[0050] The minimum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the minimum current limit value within the corresponding interval is taken;

[0051] The maximum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, the maximum current limit value within the corresponding interval is taken.

[0052] The step S20 is specifically as follows:

[0053] The middle computer sets a sampling period, and obtains voltage and temperature from the lower computer at regular intervals based on the sampling period.

[0054] The step S40 is exemplified as follows:

[0055] Example 1: Configure the voltage limit matching mode to the right interval, the temperature limit matching mode to the left interval, the voltage sampled by the mid-level computer is 3.47V, and the temperature is 25°. The row corresponding to the voltage is 3.5V, the row corresponding to the temperature is 20°, and the current limit is the intersection of the row and column, that is, the current limit is 19A.

[0056] Example 2: Configure the voltage and temperature limit matching mode to the minimum value. The sampled voltage is 3.47V and the temperature is 25°. The rows corresponding to the voltage are 3.4V and 3.5V, and the rows corresponding to the temperature are 20° and 30°. The current limit is the minimum value in the intersection of the two rows and two columns (20, 19, 10, 9), that is, the current limit is 9A.

[0057] A preferred embodiment of a current limit matrix matching system for battery testing of the present invention includes the following modules:

[0058] Configuration module, used for configuring a matrix limit table in the intermediate computer and setting four limit matching modes;

[0059] The voltage and temperature acquisition module is used for the intermediate computer to obtain voltage and temperature from the lower computer or BMS at regular intervals;

[0060] The limit matching mode setting module is used for the intermediate computer to set the limit matching modes corresponding to the voltage and current respectively based on the configuration instructions sent by the upper computer;

[0061] The current limit matching module is used for the intermediate machine to automatically match the current limit from the matrix limit table based on the voltage, temperature and limit matching mode.

[0062] In the configuration module, the matrix limit table includes a plurality of voltages and temperatures, and each of the voltages and temperatures uniquely corresponds to a current limit.

[0063] In the configuration module, the limit matching modes are left interval, right interval, minimum value and maximum value.

[0064] The matrix limit table is exemplified as follows:

[0065]

[0066] The left interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the smallest current limit value in the corresponding interval is taken;

[0067] The right interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the largest current limit value in the corresponding interval is taken;

[0068] The minimum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the minimum current limit value within the corresponding interval is taken;

[0069] The maximum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, the maximum current limit value within the corresponding interval is taken.

[0070] The voltage and temperature acquisition module is specifically used for:

[0071] The middle computer sets a sampling period, and obtains voltage and temperature from the lower computer at regular intervals based on the sampling period.

[0072] The current limit matching module is exemplified as follows:

[0073] Example 1: Configure the voltage limit matching mode to the right interval, the temperature limit matching mode to the left interval, the voltage sampled by the mid-level computer is 3.47V, and the temperature is 25°. The row corresponding to the voltage is 3.5V, the row corresponding to the temperature is 20°, and the current limit is the intersection of the row and column, that is, the current limit is 19A.

[0074] Example 2: Configure the voltage and temperature limit matching mode to the minimum value. The sampled voltage is 3.47V and the temperature is 25°. The rows corresponding to the voltage are 3.4V and 3.5V, and the rows corresponding to the temperature are 20° and 30°. The current limit is the minimum value in the intersection of the two rows and two columns (20, 19, 10, 9), that is, the current limit is 9A.

[0075] In summary, the advantages of the present invention are:

[0076] By configuring the matrix limit table, setting four limit matching modes, and setting the limit matching modes corresponding to the voltage and current respectively, and then based on the voltage and temperature obtained by the intermediate computer from the lower computer or BMS at regular intervals, the corresponding limit matching mode is used to automatically match the current limit from the matrix limit table. Compared with the traditional matching based on experience, the accuracy of current limit matching is greatly improved; and the limit matching modes corresponding to the voltage and temperature can be adjusted as needed, thereby greatly improving the flexibility of current limit matching.

[0077] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A current limit matrix matching method for battery testing, Features: The steps include: Step S10, the intermediate computer configures a matrix limit table and sets four limit matching modes; the limit matching modes are left interval, right interval, minimum value and maximum value; the left interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the smallest current limit in the corresponding interval is taken; Step S20: The intermediate computer periodically obtains voltage and temperature from the lower computer; Step S30: The intermediate computer sets the limit matching modes corresponding to the voltage and current respectively based on the configuration instructions sent by the upper computer; Step S40: The intermediate machine automatically matches the current limit value from the matrix limit value table based on the voltage, temperature and limit value matching mode.

2. A current limit matrix matching method for battery testing as claimed in claim 1, Features: In the step S10, the matrix limit value table includes a plurality of voltages and temperatures, and each of the voltages and temperatures uniquely corresponds to a current limit value.

3. A current limit matrix matching method for battery testing as claimed in claim 1, Features: The right interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the largest current limit value in the corresponding interval is taken; The minimum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the minimum current limit value within the corresponding interval is taken; The maximum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, the maximum current limit value within the corresponding interval is taken.

4. A current limit matrix matching method for battery testing as claimed in claim 1, Features: The step S20 is specifically as follows: The middle computer sets a sampling period, and obtains voltage and temperature from the lower computer at regular intervals based on the sampling period.

5. A current limit matrix matching system for battery testing, Features: Includes the following modules: A configuration module is used for configuring a matrix limit table in the intermediate computer and setting four limit matching modes; the limit matching modes are left interval, right interval, minimum value and maximum value; the left interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the smallest current limit in the corresponding interval is taken; Voltage and temperature acquisition module, used by the intermediate computer to obtain voltage and temperature from the lower computer at regular intervals; The limit matching mode setting module is used for the intermediate computer to set the limit matching modes corresponding to the voltage and current respectively based on the configuration instructions sent by the upper computer; The current limit matching module is used for the intermediate machine to automatically match the current limit from the matrix limit table based on the voltage, temperature and limit matching mode.

6. A current limit matrix matching system for battery testing as claimed in claim 5, Features: In the configuration module, the matrix limit table includes a plurality of voltages and temperatures, and each of the voltages and temperatures uniquely corresponds to a current limit.

7. A current limit matrix matching system for battery testing as claimed in claim 5, Features: The right interval is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the row or column with the largest current limit value in the corresponding interval is taken; The minimum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, then the minimum current limit value within the corresponding interval is taken; The maximum value is specifically: if the voltage or temperature is within the interval of the matrix limit table, the maximum current limit value within the corresponding interval is taken.

8. A current limit matrix matching system for battery testing as claimed in claim 5, Features: The voltage and temperature acquisition module is specifically used for: The middle computer sets a sampling period, and obtains voltage and temperature from the lower computer at regular intervals based on the sampling period.

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