Battery charging and discharging high and low temperature protection and recovery test system, method and device

Abstract

The invention provides a battery charging and discharging high and low temperature protection and recovery test system, method and device, and relates to the technical field of battery high and low temperature protection function testing, and the system comprises an incubator which is provided with a temperature sensor used for obtaining the reference temperature value of the incubator; the energy storage power supply comprises a BMS module; the resistance box is electrically connected with the temperature detection circuit of the BMS module; the upper computer is electrically connected with the temperature sensor, the energy storage power supply and the resistance box; the upper computer is used for determining an initial output resistance value according to the reference temperature value based on the NTC temperature-resistance comparison table; controlling the resistance box to dynamically adjust an output resistance value to simulate battery temperature change, and respectively recording a time node, the output resistance value and a temperature value when the BMS module triggers and relieves high-temperature protection and low-temperature protection; and generating a test report. According to the technical scheme, based on the NTC temperature-resistance comparison table, the temperature change of the battery is simulated by dynamically adjusting the output resistance value, the heating or cooling process of the incubator is avoided, and the testing efficiency is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery high and low temperature protection function test, in particular to a battery charging and discharging high and low temperature protection and recovery test system, method and device. BACKGROUND

[0002] As the core energy carrier of new energy vehicles, energy storage power stations, portable electronic devices and other scenarios, the safe and stable operation of the battery in high and low temperature environments is directly related to the reliability and safety of the equipment. When the battery is in an extreme high temperature environment, it may cause electrolyte decomposition, separator aging and even thermal runaway. In an extreme low temperature environment, the charging and discharging efficiency will drop sharply, the capacity will decay rapidly, and the battery will be permanently damaged. Therefore, the high and low temperature protection function of the battery management system (BMS, Battery Management System) is the core mechanism to protect the battery life and avoid safety accidents.

[0003] To verify the effectiveness of this protection function, the battery high and low temperature protection function needs to be tested. In related technologies, the test system includes a temperature chamber, an NTC (Negative Temperature Coefficient Thermistor) and a battery. The temperature sensor of the temperature chamber is electrically connected to the NTC, and the current temperature of the NTC is obtained through the temperature sensor. The BMS module of the energy storage power supply triggers high temperature protection or low temperature protection by reading the temperature data collected by the temperature sensor.

[0004] The limitation of this test method is that it relies on the temperature rise or drop of the temperature chamber, but the temperature rise or drop of the temperature chamber is slow, and the test single cycle takes several hours, which is low in efficiency. SUMMARY

[0005] To solve or improve the technical problem of low efficiency of the traditional test method relying on the temperature rise or drop of the temperature chamber, one object of the present application is to provide a battery charging and discharging high and low temperature protection and recovery test system.

[0006] Another object of the present application is to provide a battery charging and discharging high and low temperature protection and recovery test method.

[0007] Another object of the present application is to provide a battery charging and discharging high and low temperature protection and recovery test device.

[0008] To achieve the above object, the application provides a battery charging and discharging high and low temperature protection and recovery test system, which comprises a temperature box, a temperature sensor arranged in the temperature box, the temperature sensor being used to obtain a reference temperature value of the temperature box, an energy storage power supply comprising a BMS module, a resistance box electrically connected with a temperature detection circuit of the BMS module, and an upper computer electrically connected with the temperature sensor, the energy storage power supply and the resistance box, wherein the upper computer is used to determine an initial output resistance value of the resistance box based on a temperature-resistance value table of NTC according to the reference temperature value, control the resistance box to dynamically adjust the output resistance value to simulate the battery temperature change in the case of charging or discharging the energy storage power supply, and record time nodes, output resistance values and temperature values of the BMS module when triggering and releasing high and low temperature protection respectively, and generate a test report according to the time nodes, the output resistance values and the temperature values.

[0009] The application aims to provide a battery charging and discharging high and low temperature protection and recovery test system, which simulates the battery temperature change by dynamically adjusting the output resistance value of the resistance box based on the temperature-resistance value table of NTC, and realizes the resistance box to simulate the NTC to test the battery charging and discharging high and low temperature protection and recovery. This test method has the following advantages: first, only the output resistance value of the resistance box needs to be adjusted, which can bypass the physical heating or cooling process of the temperature box, and has higher efficiency; second, compared with the method of simulating the temperature signal by BMS software, the temperature change is reflected by the resistance value change, which can truly reflect the protection threshold triggering characteristics of the NTC hardware circuit at the limit temperature, and has higher test precision; third, since the physical heating or cooling process of the temperature box is bypassed, the temperature box does not need to be repeatedly started and stopped during the test process, the test period can be greatly shortened, the temperature fluctuation problem of the temperature box does not need to be considered, and the test precision can be improved.

[0010] It should be noted that the resistance value of the NTC decreases with the increase of the temperature, and the temperature-resistance value relationship conforms to a specific curve. The test system dynamically outputs the resistance value corresponding to the target temperature through the resistance box, directly accesses the NTC detection circuit of the BMS module, bypasses the physical heating process of the temperature box, and realizes the temperature simulation. In the technical scheme of the application, the resistance value change of the NTC is simulated by the resistance box, the real NTC is directly replaced to access the temperature detection circuit of the BMS module, and the fast and accurate temperature protection threshold test is realized.

[0011] In some technical solutions, optionally, in the case of charging or discharging the energy storage power supply, the upper computer controls the resistance box to increase the output resistance value on the basis of the initial output resistance value to simulate the decrease of the battery temperature until the BMS module triggers the low-temperature protection, and records the low-temperature protection triggering time node, the low-temperature protection triggering resistance value and the low-temperature protection triggering temperature value; the upper computer controls the resistance box to decrease the output resistance value on the basis of the low-temperature protection triggering resistance value to simulate the increase of the battery temperature until the BMS module cancels the low-temperature protection, and records the low-temperature protection recovery time node, the low-temperature protection recovery resistance value and the low-temperature protection recovery temperature value.

[0012] In this technical solution, the output resistance value of the resistance box is dynamically adjusted to simulate the change of the battery temperature, realize the low-temperature protection and recovery of the resistance box under the condition of the NTC test battery charging and discharging, and since the physical temperature rising or falling process of the oven is bypassed, the oven does not need to be repeatedly started and stopped in the test process, the test period can be greatly shortened, the temperature fluctuation problem of the oven does not need to be considered, and the test precision is improved.

[0013] In some technical solutions, optionally, in the case of charging or discharging the energy storage power supply, the upper computer controls the resistance box to decrease the output resistance value on the basis of the initial output resistance value to simulate the increase of the battery temperature until the BMS module triggers the high-temperature protection, and records the high-temperature protection triggering time node, the high-temperature protection triggering resistance value and the high-temperature protection triggering temperature value; the upper computer controls the resistance box to increase the output resistance value on the basis of the high-temperature protection triggering resistance value to simulate the decrease of the battery temperature until the BMS module of the energy storage power supply cancels the high-temperature protection, and records the high-temperature protection recovery time node, the high-temperature protection recovery resistance value and the high-temperature protection recovery temperature value.

[0014] In this technical solution, the output resistance value of the resistance box is dynamically adjusted to simulate the change of the battery temperature, realize the high-temperature protection and recovery of the resistance box under the condition of the NTC test battery charging and discharging, and since the physical temperature rising or falling process of the oven is bypassed, the oven does not need to be repeatedly started and stopped in the test process, the test period can be greatly shortened, the temperature fluctuation problem of the oven does not need to be considered, and the test precision is improved.

[0015] In some technical solutions, optionally, the test report comprises a time-temperature-protection action relationship curve.

[0016] In this technical solution, the time-temperature-protection action relationship curve is a visual carrier of the test report, and its essence is to intuitively present the complete time sequence logic of "temperature change → BMS module protection action triggering → protection cancellation" in the battery charging and discharging process through three-dimensional data correlation (time axis, simulated temperature axis and protection action state axis), and the accurate presentation and efficient analysis of the test result are realized.

[0017] The second aspect of the present application provides a battery charging and discharging high and low temperature protection and recovery test method, which is applied to the battery charging and discharging high and low temperature protection and recovery test system in any of the above technical solutions. The test method comprises the following steps: based on the NTC temperature-resistance value table, the initial output resistance value of the resistance box is determined according to the reference temperature value of the temperature box; in the case of charging or discharging the energy storage power supply, the output resistance value of the resistance box is dynamically adjusted to simulate the change of the battery temperature, and the time node, the output resistance value and the temperature value of the BMS module of the energy storage power supply when triggering and releasing the high and low temperature protection are recorded respectively; and a test report is generated according to the time node, the output resistance value and the temperature value.

[0018] The present application aims to provide a battery charging and discharging high and low temperature protection and recovery test method, which is based on the NTC temperature-resistance value table and dynamically adjusts the output resistance value of the resistance box to simulate the change of the battery temperature, so as to realize the resistance box simulating the NTC test battery charging and discharging high and low temperature protection and recovery. This test method has the following advantages: first, it only needs to adjust the output resistance value of the resistance box, can bypass the physical heating or cooling process of the temperature box, and is more efficient; second, compared with the method of simulating the temperature signal through the BMS software, the temperature change is reflected through the resistance value change, which can truly reflect the protection threshold triggering characteristics of the NTC hardware circuit at the extreme temperature, and has higher test accuracy; third, since the physical heating or cooling process of the temperature box is bypassed, the temperature box does not need to be started and stopped repeatedly during the test process, the test period can be greatly shortened, the temperature fluctuation problem of the temperature box does not need to be considered, and the test accuracy can be improved.

[0019] In some technical solutions, in the case of charging or discharging the energy storage power supply, the output resistance value of the resistance box is dynamically adjusted to simulate the change of the battery temperature, and the time node, the output resistance value and the temperature value of the BMS module of the energy storage power supply when triggering and releasing the high and low temperature protection are recorded respectively, which comprises the following steps:

[0020] In the case of charging or discharging the energy storage power supply, the output resistance value of the resistance box is increased on the basis of the initial output resistance value to simulate the decrease of the battery temperature, until the BMS module triggers the low temperature protection, and the low temperature protection triggering time node, the low temperature protection triggering resistance value and the low temperature protection triggering temperature value are recorded; the output resistance value of the resistance box is decreased on the basis of the low temperature protection triggering resistance value to simulate the increase of the battery temperature, until the BMS module releases the low temperature protection, and the low temperature protection recovery time node, the low temperature protection recovery resistance value and the low temperature protection recovery temperature value are recorded.

[0021] In the case of charging or discharging the energy storage power supply, the resistance box is controlled to decrease the output resistance value on the basis of the initial output resistance value to simulate the increase of the battery temperature until the BMS module triggers the high temperature protection, and the high temperature protection triggering time node, the high temperature protection triggering resistance value and the high temperature protection triggering temperature value are recorded; the resistance box is controlled to increase the output resistance value on the basis of the high temperature protection triggering resistance value to simulate the decrease of the battery temperature until the BMS module cancels the high temperature protection, and the high temperature protection recovery time node, the high temperature protection recovery resistance value and the high temperature protection recovery temperature value are recorded.

[0022] In the technical scheme, the output resistance value of the resistance box is dynamically adjusted to simulate the change of the battery temperature, so that the high and low temperature protection and recovery of the resistance box in the case of charging and discharging the test battery are realized. Since the physical heating or cooling process of the oven is bypassed, the oven does not need to be repeatedly started and stopped during the test, the test period can be greatly shortened, the temperature fluctuation problem of the oven does not need to be considered, and the test precision is improved.

[0023] In some technical schemes, optionally, in the case of charging or discharging the energy storage power supply, the resistance box is controlled to increase the output resistance value on the basis of the initial output resistance value to simulate the decrease of the battery temperature until the BMS module triggers the low temperature protection, and the low temperature protection triggering time node, the low temperature protection triggering resistance value and the low temperature protection triggering temperature value are recorded; the resistance box is controlled to decrease the output resistance value on the basis of the low temperature protection triggering resistance value to simulate the increase of the battery temperature until the BMS module cancels the low temperature protection, and the low temperature protection recovery time node, the low temperature protection recovery resistance value and the low temperature protection recovery temperature value are recorded, including:

[0024] In the case of charging the energy storage power supply, the resistance box is controlled to increase the output resistance value at a first rate on the basis of the initial output resistance value to simulate the decrease of the battery temperature until the energy storage power supply stops charging and the BMS module triggers the low temperature protection, and the first low temperature protection triggering time node, the first low temperature protection triggering resistance value and the first low temperature protection triggering temperature value are recorded; the resistance box is controlled to decrease the output resistance value at a second rate on the basis of the first low temperature protection triggering resistance value to simulate the increase of the battery temperature until the BMS module cancels the low temperature protection, and the first low temperature protection recovery time node, the first low temperature protection recovery resistance value and the first low temperature protection recovery temperature value are recorded.

[0025] In the case of discharging the energy storage power supply, the resistance box is controlled to increase the output resistance value at a third rate on the basis of the initial output resistance value to simulate the decrease of the battery temperature until the energy storage power supply stops discharging and the BMS module triggers the low-temperature protection, and the second low-temperature protection triggering time node, the second low-temperature protection triggering resistance value and the second low-temperature protection triggering temperature value are recorded; the resistance box is controlled to decrease the output resistance value at a fourth rate on the basis of the second low-temperature protection triggering resistance value to simulate the increase of the battery temperature until the BMS module cancels the low-temperature protection, and the second low-temperature protection recovery time node, the second low-temperature protection recovery resistance value and the second low-temperature protection recovery temperature value are recorded.

[0026] In the technical scheme, the output resistance value of the resistance box is controlled to change at a uniform speed to simulate the uniform change of the battery temperature, so that the temperature protection threshold is tested quickly and accurately in the subsequent steps, without considering the temperature fluctuation of the temperature box, and the test precision is improved.

[0027] In some technical schemes, optionally, in the case of charging or discharging the energy storage power supply, the resistance box is controlled to decrease the output resistance value on the basis of the initial output resistance value to simulate the increase of the battery temperature until the BMS module triggers the high-temperature protection, and the high-temperature protection triggering time node, the high-temperature protection triggering resistance value and the high-temperature protection triggering temperature value are recorded; the resistance box is controlled to increase the output resistance value on the basis of the high-temperature protection triggering resistance value to simulate the decrease of the battery temperature until the BMS module cancels the high-temperature protection, and the high-temperature protection recovery time node, the high-temperature protection recovery resistance value and the high-temperature protection recovery temperature value are recorded, including:

[0028] In the case of charging the energy storage power supply, the resistance box is controlled to decrease the output resistance value at a fifth rate on the basis of the initial output resistance value to simulate the increase of the battery temperature until the energy storage power supply stops charging and the BMS module triggers the high-temperature protection, and the first high-temperature protection triggering time node, the first high-temperature protection triggering resistance value and the first high-temperature protection triggering temperature value are recorded; the resistance box is controlled to increase the output resistance value at a sixth rate on the basis of the high-temperature protection triggering resistance value to simulate the decrease of the battery temperature until the BMS module cancels the high-temperature protection, and the first high-temperature protection recovery time node, the first high-temperature protection recovery resistance value and the first high-temperature protection recovery temperature value are recorded.

[0029] In the case of discharging the energy storage power supply, the control resistance box reduces the output resistance value at the seventh rate on the basis of the initial output resistance value to simulate the battery temperature rise until the energy storage power supply stops discharging and the BMS module triggers the high temperature protection, records the second high temperature protection trigger time node, the second high temperature protection trigger resistance value and the second high temperature protection trigger temperature value; the control resistance box increases the output resistance value at the eighth rate on the basis of the high temperature protection trigger resistance value to simulate the battery temperature drop until the BMS module cancels the high temperature protection, records the second high temperature protection recovery time node, the second high temperature protection recovery resistance value and the second high temperature protection recovery temperature value.

[0030] In the technical scheme, the output resistance value of the control resistance box is uniformly changed to simulate the uniform change of the battery temperature, so that the temperature protection threshold is tested quickly and accurately in the subsequent steps, without considering the temperature fluctuation of the temperature box, and the test accuracy is improved.

[0031] In some technical schemes, optionally, the test report is generated according to the time node, the output resistance value and the temperature value, including: generating the test report according to the low temperature protection trigger time node, the low temperature protection trigger resistance value, the low temperature protection trigger temperature value, the low temperature protection recovery time node, the low temperature protection recovery resistance value, the low temperature protection recovery temperature value, the high temperature protection trigger time node, the high temperature protection trigger resistance value, the high temperature protection trigger temperature value, the high temperature protection recovery time node, the high temperature protection recovery resistance value and the high temperature protection recovery temperature value.

[0032] In the technical scheme, the test report is generated based on the trigger and recovery parameters of the low temperature protection and the trigger and recovery parameters of the high temperature protection, and the accurate presentation and efficient analysis of the test results are facilitated.

[0033] The third aspect of the application provides a battery charging and discharging high and low temperature protection and recovery test device applied to the battery charging and discharging high and low temperature protection and recovery test system in any of the above technical schemes, and the test device comprises: an initial output resistance value determination unit configured to determine the initial output resistance value of the resistance box based on the temperature-resistance value table of the NTC according to the reference temperature value of the temperature box; a control and test unit configured to control the resistance box to dynamically adjust the output resistance value to simulate the change of the battery temperature in the case of charging or discharging the energy storage power supply, and record the time node, the output resistance value and the temperature value of the BMS module of the energy storage power supply when triggering and canceling the high and low temperature protection; and a test report generation unit configured to generate a test report according to the time node, the output resistance value and the temperature value.

[0034] The application aims to provide a battery charging and discharging high and low temperature protection and recovery testing device, based on a temperature-resistance value table of NTC, by dynamically adjusting the output resistance value of a resistance box to simulate battery temperature change, realizing resistance box simulation NTC testing battery charging and discharging high and low temperature protection and recovery. This testing method, first, only needs to adjust the output resistance value of the resistance box, can bypass the physical heating or cooling process of the temperature box, is more efficient; second, compared with the method of simulating temperature signal through BMS software, by reflecting temperature change through resistance value change, can truly reflect the protection threshold trigger characteristics of NTC hardware circuit at extreme temperature, is more accurate; third, since the physical heating or cooling process of the temperature box is bypassed, the temperature box does not need to be repeatedly started and stopped during the testing process, can greatly shorten the testing period, does not need to consider the temperature fluctuation problem of the temperature box, is beneficial to improve the testing accuracy.

[0035] Additional aspects and advantages of the technical solutions of the application will become apparent from the following description part or be understood through the practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 A structural block diagram of a battery charging and discharging high and low temperature protection and recovery testing system according to one embodiment of the application is shown;

[0037] Figure 2 A structural block diagram of an energy storage power supply according to one embodiment of the application is shown;

[0038] Figure 3 A flowchart of a battery charging and discharging high and low temperature protection and recovery testing method according to one embodiment of the application is shown;

[0039] Figure 4 A flowchart of a battery charging and discharging high and low temperature protection and recovery testing method according to another embodiment of the application is shown;

[0040] Figure 5 A flowchart of a battery charging and discharging high and low temperature protection and recovery testing method according to another embodiment of the application is shown;

[0041] Figure 6 A flowchart of a battery charging and discharging high and low temperature protection and recovery testing method according to another embodiment of the application is shown;

[0042] Figure 7 A flowchart of a battery charging and discharging high and low temperature protection and recovery testing method according to another embodiment of the application is shown;

[0043] Figure 8 A structural block diagram of a battery charging and discharging high and low temperature protection and recovery testing device according to one embodiment of the application is shown;

[0044] Figure 9 A structural block diagram of an electronic device according to an embodiment of the present application is shown;

[0045] Figure 10 A flow chart of a test method for battery charge-discharge high-low temperature protection and recovery according to another embodiment of the present application is shown.

[0046] wherein, Figures 1 to 10 The correspondence between the reference signs and the component names is as follows:

[0047] 100: battery charge-discharge high-low temperature protection and recovery test system; 110: temperature box; 111: temperature sensor; 120: energy storage power supply; 121: battery pack; 122: BMS module; 1221: temperature detection circuit; 130: resistance box; 140: upper computer; 151: AC / DC power supply; 152: AC / DC load; 300: battery charge-discharge high-low temperature protection and recovery test device; 310: initial output resistance value determination unit; 320: control and test unit; 330: test report generation unit; 400: electronic device; 410: memory; 420: processor. DETAILED DESCRIPTION

[0048] In order to enable a more clear understanding of the above-mentioned purposes, features and advantages of the embodiments of the present application, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0049] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the embodiments of the present application can also be implemented in other ways different from those described herein, and therefore, the protection scope of the present application is not limited to the specific embodiments disclosed below.

[0050] The battery high-low temperature protection function is crucial for the safety and service life of the equipment. Therefore, it is usually necessary to test the battery high-low temperature protection function.

[0051] It should be noted that the battery high-low temperature protection function refers to that the battery management system (BMS) monitors the battery temperature, and when the temperature exceeds the preset high temperature threshold or low temperature threshold, automatically triggers a protection action (such as stopping charging or discharging) to prevent the battery from being damaged or causing safety risks due to extreme temperature; when the temperature returns to the normal threshold range, automatically releases the protection and restores the normal charge-discharge function of the battery to ensure the safety and service life of the battery.

[0052] In the related art, a test system includes a temperature box, an NTC (Negative Temperature Coefficient Thermistor) and a battery. The temperature sensor of the temperature box is electrically connected with the NTC, and the current temperature of the NTC is acquired through the temperature sensor. The BMS module of the energy storage power source triggers high-temperature protection or low-temperature protection by reading the temperature data collected by the temperature sensor.

[0053] The limitations of this test method are as follows: first, it depends on the temperature rise or fall of the temperature box, but the temperature rise or fall of the temperature box is slow, and it takes several hours for a single cycle of testing, which is low in efficiency; second, the temperature signal is simulated by the BMS software, and the protection threshold triggering characteristics of the NTC hardware circuit at the limit temperature cannot be truly reflected; third, the temperature box needs to be repeatedly started and stopped during the test, and the data needs to be recorded manually, which results in a long test period (usually not less than 8 hours), and the temperature fluctuation of the temperature box results in poor accuracy.

[0054] It should be noted that the core characteristic of the NTC is that the resistance value decreases with the increase of the temperature, and the relationship between the temperature and the resistance value conforms to a specific curve (such as the Steinhart-Hart equation). The temperature change is reflected by the resistance value change, and the temperature signal basis is provided for the high and low temperature protection of the battery. The Steinhart-Hart equation is an empirical formula for accurately describing the relationship between the temperature and the resistance value of the negative temperature coefficient thermistor.

[0055] The application provides a battery charging and discharging high and low temperature protection and recovery test system, method and device, which simulates the battery temperature change by dynamically adjusting the output resistance value of the resistance box based on the temperature-resistance value table of the NTC, so as to realize the resistance box simulation NTC test battery charging and discharging high and low temperature protection and recovery. This test method has the following advantages: first, only the output resistance value of the resistance box needs to be adjusted, which can bypass the physical temperature rise or fall process of the temperature box, and is more efficient; second, compared with the method of simulating the temperature signal by the BMS software, the temperature change is reflected by the resistance value change, which can truly reflect the protection threshold triggering characteristics of the NTC hardware circuit at the limit temperature, and is more accurate; third, since the physical temperature rise or fall process of the temperature box is bypassed, the temperature box does not need to be repeatedly started and stopped during the test, and the test period can be greatly shortened, and the temperature fluctuation of the temperature box does not need to be considered, which is beneficial to improve the test accuracy.

[0056] In the related art, the NTC probe built in the temperature box directly monitors the temperature, and the protection is triggered by reading the temperature data through the BMS module. This test method has the problem that the temperature sampling of the temperature box and the BMS module is not synchronized.

[0057] In the technical solution of the application, the output resistance value of the resistance box is dynamically adjusted to simulate battery temperature changes, effectively solving the problem of asynchronization of temperature sampling of the temperature box and the BMS module, and the test precision is higher.

[0058] In the related art, a hot air gun is used to heat the NTC to test high-temperature protection and recovery, but low-temperature protection and recovery cannot be tested.

[0059] In the technical solution of the application, the output resistance value of the resistance box is dynamically adjusted to simulate battery temperature changes, support-40℃ to 125℃ full temperature range simulation, without real temperature box limit working condition, effectively solving the problem that the hot air gun cannot test low-temperature protection and recovery in the traditional test.

[0060] The following refers to Figures 1 to 10 The battery charging and discharging high and low temperature protection and recovery test system, method and device provided according to some embodiments of the application are described.

[0061] In one embodiment of the application, as Figure 1 shown, the battery charging and discharging high and low temperature protection and recovery test system 100 includes a temperature box 110, an energy storage power supply 120, a resistance box 130 and an upper computer 140.

[0062] The temperature box 110 is provided with a temperature sensor 111, and the temperature sensor 111 is used to obtain a reference temperature value of the temperature box 110. Figure 2 As shown, the energy storage power supply 120 includes a BMS (Battery Management System, battery management system) module 122. The resistance box 130 is electrically connected with a temperature detection circuit 1221 of the BMS module 122. The upper computer 140 is electrically connected with the temperature sensor 111, the energy storage power supply 120 and the resistance box 130.

[0063] The upper computer 140 is used to determine an initial output resistance value of the resistance box 130 according to the reference temperature value based on a temperature-resistance value table of NTC (Negative Temperature Coefficient Thermistor, negative temperature coefficient thermistor). In the case of charging or discharging the energy storage power supply 120, the resistance box 130 is controlled to dynamically adjust the output resistance value to simulate battery temperature changes, and the time nodes, the output resistance values and the temperature values of the BMS module 122 when triggering and releasing high and low temperature protection are recorded respectively. A test report is generated according to the time nodes, the output resistance values and the temperature values.

[0064] The temperature box 110 is an experimental equipment capable of providing a stable and controllable temperature environment, and is used to provide a reference temperature in the test system. The initial output resistance value of the resistance box 130 can be calibrated through the reference temperature.

[0065] The energy storage power supply 120 is a measured object in the test system, which refers to a portable power supply device capable of storing and outputting electric energy. The energy storage power supply 120 includes a battery pack 121 and a BMS module 122. The core function is to store electric energy through charging and release electric energy through discharging, and to realize high and low temperature protection and other safety mechanisms in the charging and discharging process by relying on the BMS module 122.

[0066] The resistance box 130 is an electronic device 400 capable of accurately adjusting and outputting a specific resistance value, which is used to simulate the resistance value change of the NTC in the test system. Through the control of the upper computer 140, the resistance box 130 can dynamically output the resistance value corresponding to the target temperature, directly access the temperature detection circuit 1221 of the BMS module 122 (replace the real NTC), realize the "simulation" of the high and low temperature state of the battery, and trigger or release the protection function of the BMS module 122.

[0067] The upper computer 140 refers to a computer system or a special control terminal with data processing, device control and communication functions, which is the core control and monitoring unit of the test system. The upper computer 140 pre-stores the temperature-resistance value table of the NTC, controls the resistance box 130 to output the target resistance value through the communication interface, synchronously collects the temperature data of the temperature box 110, the output resistance value of the resistance box 130 and the BMS protection signal, finally generates a test report, and realizes the automation and data of the test process.

[0068] Optionally, the test report includes a time-temperature-protection action relationship curve.

[0069] Optionally, the upper computer 140 is further used to calculate whether the protection hysteresis meets the requirements according to the output resistance value and the temperature value and the corresponding design threshold.

[0070] The present application aims to provide a test system 100 for battery charging and discharging high and low temperature protection and recovery, which is based on the temperature-resistance value table of the NTC, dynamically adjusts the output resistance value of the resistance box 130 to simulate the temperature change of the battery, and realizes the resistance box 130 to simulate the NTC to test the battery charging and discharging high and low temperature protection and recovery. This test method, first of all, only needs to adjust the output resistance value of the resistance box 130, can bypass the physical heating or cooling process of the temperature box 110, and is more efficient; secondly, compared with the way of simulating temperature signal through BMS software, the temperature change is reflected by the resistance value change, which can truly reflect the protection threshold trigger characteristics of the NTC hardware circuit at the limit temperature, and has higher test precision; thirdly, since the physical heating or cooling process of the temperature box 110 is bypassed, the temperature box 110 does not need to be started and stopped repeatedly during the test process, the test period can be greatly shortened, the temperature fluctuation problem of the temperature box 110 does not need to be considered, and the test precision can be improved.

[0071] It should be noted that the resistance of the NTC decreases with the increase of temperature, and the temperature-resistance relationship conforms to a specific curve. The test system dynamically outputs the resistance value corresponding to the target temperature through the resistance box 130, directly accesses the NTC detection circuit of the BMS module 122, bypasses the physical temperature rising process of the temperature box 110, and realizes "temperature simulation". In the technical scheme of the present application, the resistance box 130 simulates the resistance value change of the NTC, directly replaces the real NTC to access the temperature detection circuit 1221 of the BMS module 122, and realizes rapid and accurate temperature protection threshold value test.

[0072] In one specific embodiment, the temperature sensor 111 is a PT100 temperature sensor. Specifically, "PT" indicates that the core material of the temperature sensor 111 is platinum, and "100" indicates that the resistance value of the temperature sensor 111 at 0℃ is 100Ω.

[0073] In some embodiments, the host computer 140 optionally pre-stores a temperature-resistance table of the NTC. The host computer 140 obtains temperature data in real time through the temperature sensor 111, and the temperature data includes the current temperature value of the temperature box 110. The host computer 140 calculates the target output resistance value according to the current temperature value of the temperature box 110. For example, when the current temperature value of the temperature box 110 is 25℃, the target output resistance value of the resistance box 130 is 10kΩ; when the current temperature value of the temperature box 110 is 125℃, the target output resistance value of the resistance box 130 is 100Ω. The host computer 140 dynamically adjusts the output resistance value of the resistance box 130 according to the temperature-resistance table of the NTC, to simulate the battery temperature change and forcibly trigger the high and low temperature protection of the BMS module 122.

[0074] In some embodiments, the test system 100 for battery charging and discharging high and low temperature protection and recovery optionally further comprises a PLC controller (Programmable Logic Controller). The PLC controller is electrically connected with the BMS module 122 and the resistance box 130. The PLC controller is used to receive the protection signal of the BMS module 122, automatically reverse adjust the output resistance value of the resistance box 130, realize the cycle test of protection-recovery, and improve the automation degree and efficiency of the test process.

[0075] In the technical scheme of the present application, the output resistance value of the resistance box 130 is automatically switched to the recovery threshold value after the low temperature protection or high temperature protection is triggered, and the protection release function is verified.

[0076] The test system of the present application has the following advantages: first, the test time is shortened (from 8 hours in the conventional test mode to 30 minutes); second, the protection threshold deviation can be accurately verified by controlling the high-precision resistance box 130 and changing the output resistance value (the control accuracy is ±0.1Ω); third, the output resistance value of the resistance box 130 is dynamically adjusted to simulate the battery temperature change, supporting the simulation of the full temperature range of-40℃ to 125℃ without the need for real temperature chamber 110 extreme conditions.

[0077] It should be particularly noted that the switching of the output resistance value of the resistance box 130 can be completed in seconds, which improves the test efficiency and the temperature adjustment speed by more than 50 times compared with the heating or cooling method by the temperature chamber 110. The output resistance value of the resistance box 130 can be controlled by the PLC controller, and the data repeatability is enhanced, effectively avoiding the test errors caused by the temperature fluctuations of the temperature chamber 110. The test system of the present application does not have high precision requirements for the temperature chamber 110, and an ordinary resistance box 130 can realize full-temperature range testing, which is beneficial to save electricity and reduce testing costs.

[0078] In a specific embodiment, the reference temperature of the temperature chamber 110 is 25℃.

[0079] In a specific embodiment, the performance parameters of the resistance box 130 are "0.1Ω step" and "±0.05% accuracy".

[0080] Wherein, "0.1Ω step" means that the minimum change unit of the output resistance value of the resistance box 130 is 0.1Ω. "±0.05% accuracy" represents the error range of the dynamic output resistance value of the resistance box 130.

[0081] In a specific embodiment, the host computer 140 controls the target resistance value output by the resistance box 130 through the communication interface.

[0082] Wherein, the communication interface can be GPIB (General Purpose Interface Bus, a standardized parallel communication interface protocol), or USB (Universal Serial Bus, a widely used serial communication interface standard).

[0083] In some embodiments, optionally, the BMS module 122 disconnects from the NTC, and the test system of the present application does not need to use NTC. The output end of the resistance box 130 is connected to the temperature detection interface of the BMS module 122 of the energy storage power supply 120 to simulate the NTC by the resistance box 130.

[0084] In the present application, the temperature sensor 111, the resistance box 130, and the BMS module 122 of the energy storage power supply 120 are all connected to the host computer 140, forming a closed-loop control.

[0085] During the test, the temperature box 110 is started to rise to a reference temperature of 25°C; the host computer 140 reads the real-time temperature of the temperature sensor 111, calculates the corresponding NTC standard resistance value, and controls the resistance box 130 to switch to the target output resistance value; the normal charging or discharging of the energy storage power supply 120 is started; the host computer 140 controls the resistance box 130 to decrease the resistance value at a step of 1Ω / s (simulating temperature rise), until the BMS module 122 triggers the high-temperature protection of charging / discharging, records the time node, the output resistance value, and the temperature value; the host computer 140 increases the resistance value at a step of 0.5Ω / s (simulating temperature drop), until the BMS module 122 releases the high-temperature protection of charging / discharging, records the time node, the output resistance value, and the temperature value; the host computer 140 increases the resistance value at a step of 1Ω / s (simulating temperature drop), until the BMS module 122 triggers the low-temperature protection of charging / discharging, records the time node, the output resistance value, and the temperature value; the host computer 140 decreases the resistance value at a step of 0.5Ω / s (simulating temperature rise), until the BMS module 122 releases the low-temperature protection of charging / discharging, records the time node, the output resistance value, and the temperature value; compares the above output resistance value and temperature value with the corresponding design threshold value respectively, and calculates whether the protection hysteresis meets the requirements.

[0086] The host computer 140 generates a test report according to the above time node, output resistance value, and temperature value. The temperature change curve (such as step, ramp, etc.) is automatically generated by Python (a programming language) script to verify the dynamic response characteristics.

[0087] In some embodiments, optionally, in the case of charging or discharging the energy storage power supply 120, the host computer 140 controls the resistance box 130 to increase the output resistance value on the basis of the initial output resistance value to simulate the decrease of the battery temperature, until the BMS module 122 triggers the low-temperature protection, records the low-temperature protection triggering time node, the low-temperature protection triggering resistance value, and the low-temperature protection triggering temperature value; the host computer 140 controls the resistance box 130 to decrease the output resistance value on the basis of the low-temperature protection triggering resistance value to simulate the increase of the battery temperature, until the BMS module 122 releases the low-temperature protection, records the low-temperature protection recovery time node, the low-temperature protection recovery resistance value, and the low-temperature protection recovery temperature value.

[0088] By dynamically adjusting the output resistance value of the resistance box 130, the battery temperature change is simulated, the low temperature protection and recovery of the resistance box 130 in the charging and discharging state of the NTC test battery are realized, and since the physical heating or cooling process of the temperature box 110 is bypassed, the temperature box 110 does not need to be repeatedly started and stopped during the test, the test period can be greatly shortened, the temperature fluctuation problem of the temperature box 110 does not need to be considered, and the test precision is improved.

[0089] In the case of charging the energy storage power supply 120, the resistance box 130 is controlled to increase the output resistance value at a first rate based on the initial output resistance value to simulate the decrease of the battery temperature, until the energy storage power supply 120 stops charging and the BMS module 122 triggers the low temperature protection, the first low temperature protection trigger time node, the first low temperature protection trigger resistance value and the first low temperature protection trigger temperature value are recorded; the resistance box 130 is controlled to decrease the output resistance value at a second rate based on the first low temperature protection trigger resistance value to simulate the increase of the battery temperature, until the BMS module 122 releases the low temperature protection, the first low temperature protection recovery time node, the first low temperature protection recovery resistance value and the first low temperature protection recovery temperature value are recorded.

[0090] In the case of charging the energy storage power supply 120, the resistance box 130 is controlled to increase the output resistance value at a first rate based on the initial output resistance value to simulate the decrease of the battery temperature, until the energy storage power supply 120 stops charging and the BMS module 122 triggers the low temperature protection, the first low temperature protection trigger time node, the first low temperature protection trigger resistance value and the first low temperature protection trigger temperature value are recorded; the resistance box 130 is controlled to decrease the output resistance value at a second rate based on the first low temperature protection trigger resistance value to simulate the increase of the battery temperature, until the BMS module 122 releases the low temperature protection, the first low temperature protection recovery time node, the first low temperature protection recovery resistance value and the first low temperature protection recovery temperature value are recorded.

[0091] In some embodiments, optionally, in the case of charging or discharging the energy storage power supply 120, the host computer 140 controls the resistance box 130 to decrease the output resistance value based on the initial output resistance value to simulate the increase of the battery temperature, until the BMS module 122 triggers the high temperature protection, the high temperature protection trigger time node, the high temperature protection trigger resistance value and the high temperature protection trigger temperature value are recorded; the host computer 140 controls the resistance box 130 to increase the output resistance value based on the high temperature protection trigger resistance value to simulate the decrease of the battery temperature, until the BMS module 122 of the energy storage power supply 120 releases the high temperature protection, the high temperature protection recovery time node, the high temperature protection recovery resistance value and the high temperature protection recovery temperature value are recorded.

[0092] By dynamically adjusting the output resistance value of the resistance box 130, the high temperature protection and recovery of the resistance box 130 in the simulation of the NTC test battery under the charging and discharging condition are realized. Since the physical heating or cooling process of the temperature box 110 is bypassed, the temperature box 110 does not need to be repeatedly started and stopped during the test process, the test period can be greatly shortened, the temperature fluctuation problem of the temperature box 110 does not need to be considered, and the test precision is improved.

[0093] In the case of charging the energy storage power supply 120, the resistance box 130 is controlled to decrease the output resistance value at a fifth rate on the basis of the initial output resistance value to simulate the increase of the battery temperature until the energy storage power supply 120 stops charging and the BMS module 122 triggers the high temperature protection, and the first high temperature protection trigger time node, the first high temperature protection trigger resistance value and the first high temperature protection trigger temperature value are recorded; the resistance box 130 is controlled to increase the output resistance value at a sixth rate on the basis of the high temperature protection trigger resistance value to simulate the decrease of the battery temperature until the BMS module 122 cancels the high temperature protection, and the first high temperature protection recovery time node, the first high temperature protection recovery resistance value and the first high temperature protection recovery temperature value are recorded.

[0094] In the case of charging the energy storage power supply 120, the resistance box 130 is controlled to decrease the output resistance value at a fifth rate on the basis of the initial output resistance value to simulate the increase of the battery temperature until the energy storage power supply 120 stops charging and the BMS module 122 triggers the high temperature protection, and the first high temperature protection trigger time node, the first high temperature protection trigger resistance value and the first high temperature protection trigger temperature value are recorded; the resistance box 130 is controlled to increase the output resistance value at a sixth rate on the basis of the high temperature protection trigger resistance value to simulate the decrease of the battery temperature until the BMS module 122 cancels the high temperature protection, and the first high temperature protection recovery time node, the first high temperature protection recovery resistance value and the first high temperature protection recovery temperature value are recorded.

[0095] In some embodiments, optionally, the test report includes a time-temperature-protection action relationship curve.

[0096] According to the low temperature protection trigger time node, the low temperature protection trigger resistance value, the low temperature protection trigger temperature value, the low temperature protection recovery time node, the low temperature protection recovery resistance value, the low temperature protection recovery temperature value, the high temperature protection trigger time node, the high temperature protection trigger resistance value, the high temperature protection trigger temperature value, the high temperature protection recovery time node, the high temperature protection recovery resistance value and the high temperature protection recovery temperature value, a test report is generated.

[0097] The time-temperature-protection action relationship curve is a visual carrier of the test report, and its essence is to intuitively present the complete timing logic of "temperature change→BMS module 122 protection action triggering→protection release" in the battery charging and discharging process through three-dimensional data correlation (time axis, simulated temperature axis, protection action state axis), which is beneficial to realize accurate presentation and efficient analysis of the test results.

[0098] In some embodiments, optionally, the battery charging and discharging high and low temperature protection and recovery test system 100 further comprises an AC / DC power supply 151 and an AC / DC load 152. Wherein, "AC / DC" represents alternating current or direct current.

[0099] The AC / DC power supply 151 is electrically connected with the energy storage power supply 120; the AC / DC load 152 is electrically connected with the energy storage power supply 120.

[0100] The AC / DC power supply 151 is used to provide electric energy to the energy storage power supply 120 to realize charging of the energy storage power supply 120; the energy storage power supply 120 is used to provide electric energy to the AC / DC load 152 to realize discharging of the energy storage power supply 120.

[0101] By setting the AC / DC power supply 151 and the AC / DC load 152, the charging and discharging functions of the energy storage power supply 120 can be realized, so that in the subsequent steps, the energy storage power supply 120 is in the charging and discharging state, the host computer 140 controls the resistance box 130 to dynamically adjust the output resistance value to simulate the change of the battery temperature, and the test of the high and low temperature protection and recovery is completed.

[0102] In an embodiment of the present application, the battery charging and discharging high and low temperature protection and recovery test method is applied to the battery charging and discharging high and low temperature protection and recovery test system 100 in any of the above embodiments. The specific structure of the test system will not be described here.

[0103] As shown in Figure 3 , the battery charging and discharging high and low temperature protection and recovery test method comprises:

[0104] S202, based on the temperature-resistance value table of NTC, the initial output resistance value of the resistance box is determined according to the reference temperature value of the temperature box.

[0105] The temperature box is an experimental equipment capable of providing a stable and controllable temperature environment, which is used to provide a reference temperature in the present test method, and the initial output resistance value of the resistance box can be calibrated through the reference temperature.

[0106] The resistance box is an electronic device that can accurately adjust and output a specific resistance value. In the test method, it is used to simulate the resistance value change of NTC. Through the control of the upper computer, the resistance box can dynamically output the resistance value corresponding to the target temperature, directly access the temperature detection circuit of the BMS module (replace the real NTC), realize the "simulation" of the high and low temperature state of the battery, and trigger or release the protection function of the BMS module.

[0107] The upper computer pre-stores the temperature-resistance value table of NTC. The upper computer obtains temperature data in real time through the temperature sensor, and the temperature data includes the current temperature value of the temperature box. The upper computer calculates the target output resistance value according to the current temperature value of the temperature box. For example: when the current temperature value of the temperature box is 25℃, the target output resistance value of the resistance box is 10kΩ; when the current temperature value of the temperature box is 125℃, the target output resistance value of the resistance box is 100Ω. The upper computer dynamically adjusts the output resistance value of the resistance box according to the temperature-resistance value table of NTC, so as to simulate the battery temperature change and forcibly trigger the high and low temperature protection of the BMS module.

[0108] S204, in the case of charging or discharging the energy storage power supply, the resistance box dynamically adjusts the output resistance value to simulate the battery temperature change, and records the time node, output resistance value and temperature value of the BMS module of the energy storage power supply when triggering and releasing the high and low temperature protection, respectively.

[0109] By simulating the resistance value change of NTC through the resistance box, directly replacing the real NTC to access the temperature detection circuit of the BMS module, the rapid and accurate temperature protection threshold test is realized.

[0110] S206, generating a test report according to the time node, output resistance value and temperature value.

[0111] Optionally, the test report includes a time-temperature-protection action relationship curve.

[0112] Optionally, the upper computer is also used to calculate whether the protection hysteresis meets the requirements according to the output resistance value and the temperature value and the corresponding design threshold.

[0113] The application aims to provide a battery charging and discharging high and low temperature protection and recovery test method, based on an NTC temperature-resistance value table, by dynamically adjusting the output resistance value of a resistance box to simulate battery temperature changes, and realizing resistance box simulation NTC test battery charging and discharging high and low temperature protection and recovery. This test method has the following advantages: first, only the output resistance value of the resistance box needs to be adjusted, which can bypass the physical heating or cooling process of the temperature box, and is more efficient; second, compared with the method of simulating temperature signals through BMS software, the resistance value change reflects the temperature change, which can truly reflect the protection threshold trigger characteristics of the NTC hardware circuit at the limit temperature, and has higher test accuracy; third, since the physical heating or cooling process of the temperature box is bypassed, the temperature box does not need to be repeatedly started and stopped during the test process, which can greatly shorten the test period, and the temperature fluctuation problem of the temperature box does not need to be considered, which is beneficial to improve the test accuracy.

[0114] In some embodiments, as shown in S204 (in the case of charging or discharging the energy storage power supply, controlling the resistance box to dynamically adjust the output resistance value to simulate the battery temperature change, and recording the time node, output resistance value and temperature value of the BMS module of the energy storage power supply when triggering and releasing high and low temperature protection, respectively), S204 includes: Figure 4

[0115] S2042, in the case of charging or discharging the energy storage power supply, controlling the resistance box to increase the output resistance value on the basis of the initial output resistance value to simulate the battery temperature decrease, until the BMS module triggers the low temperature protection, and recording the low temperature protection trigger time node, low temperature protection trigger resistance value and low temperature protection trigger temperature value; controlling the resistance box to decrease the output resistance value on the basis of the low temperature protection trigger resistance value to simulate the battery temperature increase, until the BMS module releases the low temperature protection, and recording the low temperature protection recovery time node, low temperature protection recovery resistance value and low temperature protection recovery temperature value.

[0116] By dynamically adjusting the output resistance value of the resistance box to simulate the battery temperature change, the resistance box simulates the NTC test battery charging and discharging low temperature protection and recovery. Since the physical heating or cooling process of the temperature box is bypassed, the temperature box does not need to be repeatedly started and stopped during the test process, which can greatly shorten the test period, and the temperature fluctuation problem of the temperature box does not need to be considered, which is beneficial to improve the test accuracy.

[0117] ​S2044, in the case of charging or discharging the energy storage power supply, the control resistance box reduces the output resistance value on the basis of the initial output resistance value to simulate the battery temperature rise, until the BMS module triggers the high temperature protection, records the high temperature protection trigger time node, high temperature protection trigger resistance value and high temperature protection trigger temperature value; control the resistance box increases the output resistance value on the basis of the high temperature protection trigger resistance value to simulate the battery temperature drop, until the BMS module cancels the high temperature protection, records the high temperature protection recovery time node, high temperature protection recovery resistance value and high temperature protection recovery temperature value.

[0118] By dynamically adjusting the output resistance value of the resistance box, the battery temperature change is simulated, the high temperature protection and recovery of the resistance box in the NTC test battery charging and discharging condition are realized, and since the physical heating or cooling process of the oven is bypassed, the oven does not need to be started and stopped repeatedly during the test, the test period can be greatly shortened, the temperature fluctuation problem of the oven does not need to be considered, and the test precision is improved.

[0119] In some embodiments, optionally, as shown in Figure 5 S2042 (in the case of charging or discharging the energy storage power supply, control the resistance box to increase the output resistance value on the basis of the initial output resistance value to simulate the battery temperature drop, until the BMS module triggers the low temperature protection, records the low temperature protection trigger time node, low temperature protection trigger resistance value and low temperature protection trigger temperature value; control the resistance box to reduce the output resistance value on the basis of the low temperature protection trigger resistance value to simulate the battery temperature rise, until the BMS module cancels the low temperature protection, records the low temperature protection recovery time node, low temperature protection recovery resistance value and low temperature protection recovery temperature value) includes:

[0120] S2045, in the case of charging the energy storage power supply, control the resistance box to increase the output resistance value at a first rate on the basis of the initial output resistance value to simulate the battery temperature drop, until the energy storage power supply stops charging and the BMS module triggers the low temperature protection, records the first low temperature protection trigger time node, the first low temperature protection trigger resistance value and the first low temperature protection trigger temperature value; control the resistance box to reduce the output resistance value at a second rate on the basis of the first low temperature protection trigger resistance value to simulate the battery temperature rise, until the BMS module cancels the low temperature protection, records the first low temperature protection recovery time node, the first low temperature protection recovery resistance value and the first low temperature protection recovery temperature value.

[0121] S2046, in the case of discharging the energy storage power supply, the control resistance box increases the output resistance value at a third rate based on the initial output resistance value to simulate the battery temperature reduction until the energy storage power supply stops discharging and the BMS module triggers the low temperature protection, records the second low temperature protection trigger time node, the second low temperature protection trigger resistance value and the second low temperature protection trigger temperature value; the control resistance box decreases the output resistance value at a fourth rate based on the second low temperature protection trigger resistance value to simulate the battery temperature rise until the BMS module releases the low temperature protection, records the second low temperature protection recovery time node, the second low temperature protection recovery resistance value and the second low temperature protection recovery temperature value.

[0122] By controlling the uniform change of the output resistance value of the resistance box, the uniform change of the battery temperature is simulated, so that the temperature protection threshold is tested quickly and accurately in the subsequent steps, without considering the temperature fluctuation problem of the oven, which is beneficial to improve the test precision.

[0123] It should be noted that the first rate and the third rate can be the same or different; the second rate and the fourth rate can be the same or different. The first rate, the second rate, the third rate and the fourth rate are flexibly set according to actual needs.

[0124] In some embodiments, optionally, the first rate is 0.8 ohm / s to 1.2 ohm / s.

[0125] By limiting the value range of the first rate, in the first aspect, in the case of charging the energy storage power supply, the rate at which the control resistance box increases the output resistance value will not be too small, so that the rate at which the battery temperature decreases will not be too small, which is beneficial to shorten the test period; in the second aspect, in the case of charging the energy storage power supply, the rate at which the control resistance box increases the output resistance value will not be too large, so that the rate at which the battery temperature decreases will not be too large, which is beneficial to simulate the real temperature change and improve the accuracy of the test result.

[0126] In one specific embodiment, the first rate is 0.8 ohm / s.

[0127] In one specific embodiment, the first rate is 1 ohm / s.

[0128] In one specific embodiment, the first rate is 1.2 ohm / s.

[0129] In some embodiments, optionally, the second rate is 0.2 ohm / s to 0.8 ohm / s.

[0130] By limiting the value range of the second rate, in the first aspect, in the case of charging the energy storage power supply, the rate at which the resistance box reduces the output resistance value will not be too small, so that the rate at which the battery temperature rises will not be too small, which is helpful to shorten the test period; in the second aspect, in the case of charging the energy storage power supply, the rate at which the resistance box reduces the output resistance value will not be too large, so that the rate at which the battery temperature rises will not be too large, which is helpful to simulate the real temperature change and improve the accuracy of the test result.

[0131] In a specific embodiment, the second rate is 0.2 ohm / s.

[0132] In a specific embodiment, the second rate is 0.5 ohm / s.

[0133] In a specific embodiment, the second rate is 0.8 ohm / s.

[0134] In some embodiments, optionally, the third rate is 0.8 ohm / s to 1.2 ohm / s.

[0135] By limiting the value range of the third rate, in the first aspect, in the case of charging the energy storage power supply, the rate at which the resistance box increases the output resistance value will not be too small, so that the rate at which the battery temperature decreases will not be too small, which is helpful to shorten the test period; in the second aspect, in the case of charging the energy storage power supply, the rate at which the resistance box increases the output resistance value will not be too large, so that the rate at which the battery temperature decreases will not be too large, which is helpful to simulate the real temperature change and improve the accuracy of the test result.

[0136] In a specific embodiment, the third rate is 0.8 ohm / s.

[0137] In a specific embodiment, the third rate is 1 ohm / s.

[0138] In a specific embodiment, the third rate is 1.2 ohm / s.

[0139] In some embodiments, optionally, the fourth rate is 0.2 ohm / s to 0.8 ohm / s.

[0140] By limiting the value range of the fourth rate, in the first aspect, in the case of charging the energy storage power supply, the rate at which the resistance box reduces the output resistance value will not be too small, so that the rate at which the battery temperature rises will not be too small, which is helpful to shorten the test period; in the second aspect, in the case of charging the energy storage power supply, the rate at which the resistance box reduces the output resistance value will not be too large, so that the rate at which the battery temperature rises will not be too large, which is helpful to simulate the real temperature change and improve the accuracy of the test result.

[0141] In a specific embodiment, the fourth rate is 0.2 ohm / s.

[0142] In one specific embodiment, the fourth rate is 0.5 ohms / second.

[0143] In one specific embodiment, the fourth rate is 0.8 ohms / second.

[0144] In some embodiments, optionally, such as Figure 6 As shown, S2044 (when charging or discharging the energy storage power supply, the control resistor box decreases its output resistance value based on the initial output resistance value to simulate a rise in battery temperature until the BMS module triggers high-temperature protection, recording the high-temperature protection trigger time point, high-temperature protection trigger resistance value, and high-temperature protection trigger temperature value; the control resistor box increases its output resistance value based on the high-temperature protection trigger resistance value to simulate a decrease in battery temperature until the BMS module releases high-temperature protection, recording the high-temperature protection recovery time point, high-temperature protection recovery resistance value, and high-temperature protection recovery temperature value) includes:

[0145] S2047, while charging the energy storage power supply, the control resistor box decreases the output resistance value at a fifth rate based on the initial output resistance value to simulate a rise in battery temperature until the energy storage power supply stops charging and the BMS module triggers high-temperature protection. The first high-temperature protection trigger time point, the first high-temperature protection trigger resistance value, and the first high-temperature protection trigger temperature value are recorded. The control resistor box increases the output resistance value at a sixth rate based on the high-temperature protection trigger resistance value to simulate a decrease in battery temperature until the BMS module releases high-temperature protection. The first high-temperature protection recovery time point, the first high-temperature protection recovery resistance value, and the first high-temperature protection recovery temperature value are recorded.

[0146] S2048, when discharging the energy storage power supply, the control resistor box decreases the output resistance value at a rate of seven based on the initial output resistance value to simulate a rise in battery temperature until the energy storage power supply stops discharging and the BMS module triggers high-temperature protection. The second high-temperature protection trigger time point, the second high-temperature protection trigger resistance value, and the second high-temperature protection trigger temperature value are recorded. The control resistor box increases the output resistance value at a rate of eight based on the high-temperature protection trigger resistance value to simulate a decrease in battery temperature until the BMS module releases the high-temperature protection. The second high-temperature protection recovery time point, the second high-temperature protection recovery resistance value, and the second high-temperature protection recovery temperature value are recorded.

[0147] By controlling the output resistance value of the resistance box to change at a constant rate, the uniform change of battery temperature is simulated, so that the temperature protection threshold can be tested quickly and accurately in subsequent steps without having to consider the temperature fluctuation of the temperature box, which helps to improve the test accuracy.

[0148] It should be noted that the fifth rate and the seventh rate can be the same or different; the sixth rate and the eighth rate can be the same or different. The fifth rate, the sixth rate, the seventh rate and the eighth rate are flexibly set according to actual needs.

[0149] In some embodiments, optionally, the fifth rate is 0.8 ohm / s to 1.2 ohm / s.

[0150] By limiting the value range of the fifth rate, in the first aspect, in the case of charging the energy storage power supply, the rate at which the resistance box reduces the output resistance value will not be too small, so that the rate at which the battery temperature rises will not be too small, which is beneficial to shorten the test period; in the second aspect, in the case of charging the energy storage power supply, the rate at which the resistance box reduces the output resistance value will not be too large, so that the rate at which the battery temperature rises will not be too large, which is beneficial to simulate real temperature changes and improve the accuracy of test results.

[0151] In a specific embodiment, the fifth rate is 0.8 ohm / s.

[0152] In a specific embodiment, the fifth rate is 1 ohm / s.

[0153] In a specific embodiment, the fifth rate is 1.2 ohm / s.

[0154] In some embodiments, optionally, the sixth rate is 0.2 ohm / s to 0.8 ohm / s.

[0155] By limiting the value range of the sixth rate, in the first aspect, in the case of charging the energy storage power supply, the rate at which the resistance box increases the output resistance value will not be too small, so that the rate at which the battery temperature decreases will not be too small, which is beneficial to shorten the test period; in the second aspect, in the case of charging the energy storage power supply, the rate at which the resistance box increases the output resistance value will not be too large, so that the rate at which the battery temperature decreases will not be too large, which is beneficial to simulate real temperature changes and improve the accuracy of test results.

[0156] In a specific embodiment, the sixth rate is 0.2 ohm / s.

[0157] In a specific embodiment, the sixth rate is 0.5 ohm / s.

[0158] In a specific embodiment, the sixth rate is 0.8 ohm / s.

[0159] In some embodiments, optionally, the seventh rate is 0.8 ohm / s to 1.2 ohm / s.

[0160] By limiting the value range of the seventh rate, in the first aspect, in the case of charging the energy storage power supply, the rate at which the resistance box reduces the output resistance value will not be too small, so that the rate at which the battery temperature rises will not be too small, which is beneficial to shorten the test period; in the second aspect, in the case of charging the energy storage power supply, the rate at which the resistance box reduces the output resistance value will not be too large, so that the rate at which the battery temperature rises will not be too large, which is beneficial to simulate the real temperature change and improve the accuracy of the test result.

[0161] In a specific embodiment, the seventh rate is 0.8 ohm / s.

[0162] In a specific embodiment, the seventh rate is 1 ohm / s.

[0163] In a specific embodiment, the seventh rate is 1.2 ohm / s.

[0164] In some embodiments, optionally, the eighth rate is 0.2 ohm / s to 0.8 ohm / s.

[0165] By limiting the value range of the eighth rate, in the first aspect, in the case of charging the energy storage power supply, the rate at which the resistance box increases the output resistance value will not be too small, so that the rate at which the battery temperature decreases will not be too small, which is beneficial to shorten the test period; in the second aspect, in the case of charging the energy storage power supply, the rate at which the resistance box increases the output resistance value will not be too large, so that the rate at which the battery temperature decreases will not be too large, which is beneficial to simulate the real temperature change and improve the accuracy of the test result.

[0166] In a specific embodiment, the eighth rate is 0.2 ohm / s.

[0167] In a specific embodiment, the eighth rate is 0.5 ohm / s.

[0168] In a specific embodiment, the eighth rate is 0.8 ohm / s.

[0169] In some embodiments, optionally, as shown in Figure 7 S206 (generating a test report according to the time node, the output resistance value and the temperature value) includes:

[0170] S2062, generating a test report according to the low-temperature protection trigger time node, the low-temperature protection trigger resistance value, the low-temperature protection trigger temperature value, the low-temperature protection recovery time node, the low-temperature protection recovery resistance value, the low-temperature protection recovery temperature value, the high-temperature protection trigger time node, the high-temperature protection trigger resistance value, the high-temperature protection trigger temperature value, the high-temperature protection recovery time node, the high-temperature protection recovery resistance value and the high-temperature protection recovery temperature value.

[0171] The test report is generated based on the triggering and recovery parameters (time nodes, output resistance values and temperature values) of low-temperature protection and the triggering and recovery parameters (time nodes, output resistance values and temperature values) of high-temperature protection, and is beneficial to realize accurate presentation and efficient analysis of the test results.

[0172] Optionally, the test report comprises a time-temperature-protection action relationship curve.

[0173] The time-temperature-protection action relationship curve is a visual carrier of the test report, and its essence is to intuitively present the complete timing logic of "temperature change → BMS module protection action triggering → protection release" in the battery charging and discharging process through three-dimensional data association (time axis, simulated temperature axis and protection action state axis), which is beneficial to realize accurate presentation and efficient analysis of the test results.

[0174] In some embodiments, as shown in Figure 10 the battery charging and discharging high-low temperature protection and recovery test method comprises:

[0175] S2221, the host computer is connected with the PT100, the resistance box and the portable energy storage power supply; the portable energy storage power supply is connected with the AC / DC power supply and the AC / DC load.

[0176] It should be noted that the "PT100" here refers to a type of temperature sensor. The "portable energy storage power supply" refers to an energy storage power supply.

[0177] S2222, start the resistance box to set the resistance value to simulate the normal working temperature of the battery.

[0178] It should be noted that the "resistance value" here refers to the resistance value. The "battery" refers to a battery pack.

[0179] S2223, start the power supply to normally charge.

[0180] It should be noted that the "power supply" here refers to an energy storage power supply.

[0181] S2224, the host computer controls the resistance box to increase the resistance value.

[0182] The purpose of this step is to simulate the decrease of the battery temperature by increasing the resistance value.

[0183] S2225, whether the power supply stops charging.

[0184] Determine whether the power supply stops charging to generate a first determination result. If the first determination result is yes, execute S2226; if the first determination result is no, return to S2224.

[0185] S2226, record the low-temperature protection temperature of charging.

[0186] S2227, the host computer controls the resistance box to adjust low resistance value.

[0187] The purpose of this step is to simulate the battery temperature rise by adjusting low resistance value.

[0188] S2228, whether the power supply resumes charging.

[0189] Determine whether the power supply resumes charging, and generate a second determination result. If the second determination result is yes, execute S2229; if the second determination result is no, return to S2227.

[0190] S2229, record the charging low temperature protection recovery temperature.

[0191] S2230, the host computer controls the resistance box to adjust low resistance value.

[0192] It should be noted that S2230 is after S2223, and the purpose of S2230 is to simulate the battery temperature rise by adjusting low resistance value.

[0193] S2231, whether the power supply stops charging.

[0194] Determine whether the power supply stops charging, and generate a third determination result. If the third determination result is yes, execute S2232; if the third determination result is no, return to S2230.

[0195] S2232, record the charging high temperature protection temperature.

[0196] S2233, the host computer controls the resistance box to adjust high resistance value.

[0197] The purpose of this step is to simulate the battery temperature drop by adjusting high resistance value.

[0198] S2234, whether the power supply resumes charging.

[0199] Determine whether the power supply resumes charging, and generate a fourth determination result. If the fourth determination result is yes, execute S2235; if the fourth determination result is no, return to S2233.

[0200] S2235, record the charging high temperature protection recovery temperature.

[0201] S2236, start the power supply normal discharge.

[0202] S2237, the host computer controls the resistance box to adjust high resistance value.

[0203] The purpose of this step is to simulate the battery temperature drop by adjusting high resistance value.

[0204] S2238, whether the power supply stops discharging.

[0205] Determine whether the power supply stops discharging, and generate a fifth determination result. If the fifth determination result is yes, execute S2239; if the fifth determination result is no, return to S2237.

[0206] S2239, record the low-temperature protection temperature of discharging.

[0207] S2240, the host computer controls the resistance box to adjust to a low resistance value.

[0208] The purpose of this step is to simulate the increase of the battery temperature by adjusting the low resistance value.

[0209] S2241, whether the power supply resumes discharging.

[0210] Determine whether the power supply resumes discharging, and generate a sixth determination result. If the sixth determination result is yes, execute S2242; if the sixth determination result is no, return to S2240.

[0211] S2242, record the low-temperature protection recovery temperature of discharging.

[0212] S2243, the host computer controls the resistance box to adjust to a low resistance value.

[0213] The purpose of this step is to simulate the increase of the battery temperature by adjusting the low resistance value.

[0214] S2244, whether the power supply stops discharging.

[0215] Determine whether the power supply stops discharging, and generate a seventh determination result. If the seventh determination result is yes, execute S2245; if the seventh determination result is no, return to S2243.

[0216] S2245, record the high-temperature protection temperature of discharging.

[0217] S2246, the host computer controls the resistance box to adjust to a high resistance value.

[0218] The purpose of this step is to simulate the decrease of the battery temperature by adjusting the high resistance value.

[0219] S2247, whether the power supply resumes discharging.

[0220] Determine whether the power supply resumes discharging, and generate an eighth determination result. If the eighth determination result is yes, execute S2248; if the eighth determination result is no, return to S2246.

[0221] S2248, record the high-temperature recovery temperature of discharging.

[0222] S2249, generate a report, a time-temperature-action relationship curve.

[0223] It should be noted that the "report" here refers to a test report. The test report is presented in the form of a "time-temperature-action relationship curve".

[0224] In an embodiment of the present application, the battery charge and discharge high and low temperature protection and recovery test device 300 is applied to the battery charge and discharge high and low temperature protection and recovery test system 100 in any of the above embodiments. For the specific structure of the test system, it will not be repeated here.

[0225] As shown in Figure 8 The battery charge and discharge high and low temperature protection and recovery test device 300 includes an initial output resistance value determination unit 310, a control and test unit 320, and a test report generation unit 330.

[0226] The initial output resistance value determination unit 310 is used to determine the initial output resistance value of the resistance box 130 according to the reference temperature value of the temperature box 110 based on the temperature-resistance value table of the NTC.

[0227] The temperature box 110 is an experimental equipment that can provide a stable and controllable temperature environment, which is used to provide a reference temperature in the present test method, and the initial output resistance value of the resistance box 130 can be calibrated through the reference temperature.

[0228] The resistance box 130 is an electronic device 400 that can accurately adjust and output a specific resistance value, which is used to simulate the resistance value change of the NTC in the present test method.

[0229] By controlling the resistance box 130 to dynamically output the resistance value corresponding to the target temperature, the real NTC is replaced to realize the "simulation" of the high and low temperature state of the battery, so as to trigger or release the protection function of the BMS module 122.

[0230] The temperature-resistance value table of the NTC is pre-stored; the temperature data is obtained in real time through the temperature sensor 111, and the temperature data includes the current temperature value of the temperature box 110; the target output resistance value is calculated according to the current temperature value of the temperature box 110. For example: when the current temperature value of the temperature box 110 is 25℃, the target output resistance value of the resistance box 130 is 10kΩ; when the current temperature value of the temperature box 110 is 125℃, the target output resistance value of the resistance box 130 is 100Ω.

[0231] According to the temperature-resistance value table of the NTC, the output resistance value of the resistance box 130 is dynamically adjusted to simulate the temperature change of the battery and forcibly trigger the high and low temperature protection of the BMS module 122.

[0232] The control and test unit 320 is configured to control the dynamic adjustment of the output resistance value of the resistance box 130 to simulate the battery temperature change when the energy storage power supply 120 is charged or discharged, and record the time node, output resistance value and temperature value of the BMS module 122 of the energy storage power supply 120 when the high-temperature protection and low-temperature protection are triggered and released, respectively.

[0233] The resistance box 130 simulates the resistance value change of the NTC, directly replaces the real NTC connected to the temperature detection circuit 1221 of the BMS module 122, and realizes the rapid and accurate temperature protection threshold test.

[0234] The test report generation unit 330 is configured to generate a test report according to the time node, output resistance value and temperature value.

[0235] Optionally, the test report includes a time-temperature-protection action relationship curve.

[0236] Optionally, according to the output resistance value and temperature value and the corresponding design threshold, it is calculated whether the protection hysteresis meets the requirements.

[0237] The present application aims to provide a battery charging and discharging high and low temperature protection and recovery test device 300, based on the temperature-resistance value table of the NTC, by dynamically adjusting the output resistance value of the resistance box 130, to simulate the battery temperature change, to realize the resistance box 130 simulating the NTC test battery charging and discharging high and low temperature protection and recovery. This test method, first of all, only needs to adjust the output resistance value of the resistance box 130, which can bypass the physical heating or cooling process of the temperature box 110, and is more efficient; secondly, compared with the way of simulating temperature signal through BMS software, the resistance value change reflects the temperature change, which can truly reflect the protection threshold triggering characteristics of the NTC hardware circuit at the limit temperature, and has higher test precision; thirdly, since the physical heating or cooling process of the temperature box 110 is bypassed, the temperature box 110 does not need to be started and stopped repeatedly during the test process, which can greatly shorten the test period, and does not need to consider the temperature fluctuation problem of the temperature box 110, which is conducive to improving the test precision.

[0238] In an embodiment of the present application, as shown in Figure 9 The electronic device 400 includes a memory 410 and a processor 420. The memory 410 stores programs or instructions executable on the processor 420, and the processor 420 executes the programs or instructions to implement the steps of the battery charging and discharging high and low temperature protection and recovery test method in any of the above embodiments. The electronic device 400 has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0239] In one embodiment of the present application, a readable storage medium stores a program or instructions, which, when executed by a processor, implement the steps of the battery charging and discharging high and low temperature protection and recovery test method in any of the above embodiments. The readable storage medium has the beneficial effects of any of the above embodiments, which are not repeated here.

[0240] In the present application, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, "connecting" can be fixed connection, can also be detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0241] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the present application. In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0242] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery charge-discharge high-low temperature protection and recovery test system, characterized in that, The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method.

2. The battery charge-discharge high-low temperature protection and recovery test system according to claim 1, characterized in that, The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method.

3. The battery charge-discharge high-low temperature protection and recovery test system according to claim 1, characterized in that, The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method.

4. The battery charge-discharge high-low temperature protection and recovery test system according to any one of claims 1 to 3, characterized in that, The application relates to a battery charging and discharging high and low temperature protection and recovery test method.

5. A method for testing high and low temperature protection and recovery of battery charge and discharge, characterized in that, The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and discharging high and low temperature protection and recovery test method. The application relates to a battery charging and 6. The battery charge-discharge high-low temperature protection and recovery test method according to claim 5, characterized in that, The method comprises the following steps: in the case of charging or discharging the energy storage power supply, controlling the resistance box to dynamically adjust the output resistance value to simulate the change of the battery temperature, and recording the time node, the output resistance value and the temperature value of the BMS module of the energy storage power supply when triggering and releasing the high and low temperature protection, comprising: In the case of charging or discharging the energy storage power supply, the resistance box is controlled to increase the output resistance value on the basis of the initial output resistance value to simulate the decrease of the battery temperature, until the BMS module triggers the low temperature protection, and the low temperature protection triggering time node, the low temperature protection triggering resistance value and the low temperature protection triggering temperature value are recorded; the resistance box is controlled to decrease the output resistance value on the basis of the low temperature protection triggering resistance value to simulate the increase of the battery temperature, until the BMS module releases the low temperature protection, and the low temperature protection recovery time node, the low temperature protection recovery resistance value and the low temperature protection recovery temperature value are recorded; In the case of charging or discharging the energy storage power supply, the resistance box is controlled to decrease the output resistance value on the basis of the initial output resistance value to simulate the increase of the battery temperature, until the BMS module triggers the high temperature protection, and the high temperature protection triggering time node, the high temperature protection triggering resistance value and the high temperature protection triggering temperature value are recorded; the resistance box is controlled to increase the output resistance value on the basis of the high temperature protection triggering resistance value to simulate the decrease of the battery temperature, until the BMS module releases the high temperature protection, and the high temperature protection recovery time node, the high temperature protection recovery resistance value and the high temperature protection recovery temperature value are recorded.

7. The battery charge-discharge high-low temperature protection and recovery test method according to claim 6, characterized in that, In the case of charging or discharging the energy storage power supply, the resistance box is controlled to increase the output resistance value on the basis of the initial output resistance value to simulate the decrease of the battery temperature, until the BMS module triggers the low temperature protection, and the low temperature protection triggering time node, the low temperature protection triggering resistance value and the low temperature protection triggering temperature value are recorded; The resistance box is controlled to decrease the output resistance value on the basis of the low temperature protection triggering resistance value to simulate the increase of the battery temperature, until the BMS module releases the low temperature protection, and the low temperature protection recovery time node, the low temperature protection recovery resistance value and the low temperature protection recovery temperature value are recorded, comprising: In the case of charging the energy storage power supply, the resistance box is controlled to increase the output resistance value at a first rate on the basis of the initial output resistance value to simulate the decrease of the battery temperature, until the energy storage power supply stops charging and the BMS module triggers the low temperature protection, and the first low temperature protection triggering time node, the first low temperature protection triggering resistance value and the first low temperature protection triggering temperature value are recorded; the resistance box is controlled to decrease the output resistance value at a second rate on the basis of the first low temperature protection triggering resistance value to simulate the increase of the battery temperature, until the BMS module releases the low temperature protection, and the first low temperature protection recovery time node, the first low temperature protection recovery resistance value and the first low temperature protection recovery temperature value are recorded; In the case of discharging the energy storage power supply, the resistance box is controlled to increase the output resistance value at a third rate based on the initial output resistance value to simulate a decrease in battery temperature until the energy storage power supply stops discharging and the BMS module triggers low temperature protection, a second low temperature protection trigger time node, a second low temperature protection trigger resistance value and a second low temperature protection trigger temperature value are recorded; the resistance box is controlled to decrease the output resistance value at a fourth rate based on the second low temperature protection trigger resistance value to simulate an increase in battery temperature until the BMS module releases the low temperature protection, a second low temperature protection recovery time node, a second low temperature protection recovery resistance value and a second low temperature protection recovery temperature value are recorded.

8. The battery charge-discharge high-low temperature protection and recovery test method according to claim 6, characterized in that, In the case of charging or discharging the energy storage power supply, the resistance box is controlled to decrease the output resistance value based on the initial output resistance value to simulate an increase in battery temperature until the BMS module triggers high temperature protection, a high temperature protection trigger time node, a high temperature protection trigger resistance value and a high temperature protection trigger temperature value are recorded; The resistance box is controlled to increase the output resistance value based on the high temperature protection trigger resistance value to simulate a decrease in battery temperature until the BMS module releases the high temperature protection, a high temperature protection recovery time node, a high temperature protection recovery resistance value and a high temperature protection recovery temperature value are recorded, including: In the case of charging the energy storage power supply, the resistance box is controlled to decrease the output resistance value at a fifth rate based on the initial output resistance value to simulate an increase in battery temperature until the energy storage power supply stops charging and the BMS module triggers high temperature protection, a first high temperature protection trigger time node, a first high temperature protection trigger resistance value and a first high temperature protection trigger temperature value are recorded; the resistance box is controlled to increase the output resistance value at a sixth rate based on the high temperature protection trigger resistance value to simulate a decrease in battery temperature until the BMS module releases the high temperature protection, a first high temperature protection recovery time node, a first high temperature protection recovery resistance value and a first high temperature protection recovery temperature value are recorded; In the case of discharging the energy storage power supply, the resistance box is controlled to decrease the output resistance value at a seventh rate based on the initial output resistance value to simulate an increase in battery temperature until the energy storage power supply stops discharging and the BMS module triggers high temperature protection, a second high temperature protection trigger time node, a second high temperature protection trigger resistance value and a second high temperature protection trigger temperature value are recorded; the resistance box is controlled to increase the output resistance value at an eighth rate based on the high temperature protection trigger resistance value to simulate a decrease in battery temperature until the BMS module releases the high temperature protection, a second high temperature protection recovery time node, a second high temperature protection recovery resistance value and a second high temperature protection recovery temperature value are recorded.

9. The battery charge-discharge high-low temperature protection and recovery test method according to any one of claims 6 to 8, characterized in that, The test report is generated according to the time node, the output resistance value and the temperature value, including: According to the low-temperature protection trigger time node, the low-temperature protection trigger resistance value, the low-temperature protection trigger temperature value, the low-temperature protection recovery time node, the low-temperature protection recovery resistance value, the low-temperature protection recovery temperature value, the high-temperature protection trigger time node, the high-temperature protection trigger resistance value, the high-temperature protection trigger temperature value, the high-temperature protection recovery time node, the high-temperature protection recovery resistance value and the high-temperature protection recovery temperature value, the test report is generated.

10. A testing device for high and low temperature protection and recovery of battery charge and discharge, characterized in that, The test device is applied to the battery charging and discharging high and low temperature protection and recovery test system as claimed in any one of claims 1 to 4, and the test device comprises: An initial output resistance value determination unit is configured to determine an initial output resistance value of a resistance box based on a temperature-resistance value table of an NTC and a reference temperature value of a temperature box. A control and test unit is configured to control the resistance box to dynamically adjust an output resistance value to simulate a battery temperature change when charging or discharging the energy storage power supply, and record time nodes, output resistance values and temperature values of the BMS module of the energy storage power supply when triggering and releasing high and low temperature protection, respectively. A test report generation unit is configured to generate a test report according to the time nodes, the output resistance values and the temperature values.

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