Method for controlling temperature of a dispensing apparatus

Abstract

This invention relates to the field of battery technology and discloses a temperature control method for a capacity grading device, comprising: using multiple fan groups to dissipate heat from the batteries; acquiring the ambient temperature X1 of the capacity grading device, the temperature of each battery and calculating the average temperature X2 of each battery and the average battery temperature X in each battery placement area. 3n ; Calculate the first fitted value S1 = X1 × A + X2 × B; Use the difference between the first fitted value S1 and the preset target value as the first input value for PID calculation, and obtain the first output value P1 through PID calculation; Calculate the average battery temperature X in the battery placement area. 3n The difference between each battery temperature and the mean value X2 is calculated to obtain multiple difference values. These differences are then used as the second input values ​​for the PID controller, and the second output value P is obtained through PID calculation. 2m ; Calculate the second fitted value S2 = P1 × C + P 2m ×D; The wind speed of each fan group is controlled according to the second fitted value S2. This invention can ensure that the temperature of multiple batteries tends to be consistent, thus guaranteeing the accuracy of battery capacity measurement.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically to a temperature control method for capacity testing equipment. Background Technology

[0002] Batteries exhibit certain variations after manufacturing. To differentiate between them, capacity grading equipment is typically used to screen batteries by capacity. The battery is charged and discharged using a power supply, and the control system records all current and voltage data during the charging process. The current data and time from the capacity calibration phase are then integrated to obtain the battery's capacity information. Temperature significantly affects the battery's cutoff voltage or current, thus substantially influencing its charge and discharge performance.

[0003] Existing capacity grading equipment typically uses trays to load batteries for operation. When the number of batteries in the tray is increased, the volume of the capacity grading equipment compartment does not increase proportionally, resulting in uneven heat dissipation among the batteries. This leads to significant differences in the ambient temperature between different compartments or even among multiple batteries in the same compartment, ultimately causing large deviations in the accuracy of battery capacity measurement. Summary of the Invention

[0004] In view of this, the present invention provides a temperature control method for a capacity grading device to solve the problem that the heat dissipation effect of the capacity grading device is poor, the temperature difference between different batteries is large, and the accuracy of battery capacity measurement is deviated.

[0005] This invention provides a temperature control method for a capacity grading device. The capacity grading device includes: a device body, multiple fan groups, and multiple battery placement areas. The multiple fan groups are located at the bottom of the device body. The multiple battery placement areas are located inside the device body and above the multiple fan groups. Each battery placement area is used to place a battery, and each fan group corresponds to one battery placement area.

[0006] The temperature control method for the capacity-distribution equipment includes:

[0007] Multiple fan groups are used to dissipate heat from the batteries in each of the battery placement areas;

[0008] Obtain the ambient temperature X1 of the capacity testing device, the temperature of each battery, and calculate the average temperature X2 of each battery and the average battery temperature X in each battery placement area. 3n Where n is 1, 2, ..., n, and the unit of temperature is degrees Celsius;

[0009] Calculate the first fitted value S1 = X1 × A + X2 × B, where A is the ambient temperature coefficient and B is the battery temperature coefficient.

[0010] The difference between the first fitted value S1 and the preset target value is used as the first input value for PID calculation, and the first output value P1 is obtained by PID calculation; the preset target value is a pre-set standard temperature value.

[0011] X the average battery temperature in each of the battery placement areas 3n The difference between each of the battery temperatures and the mean value X2 is calculated to obtain multiple difference values. These multiple difference values ​​are then used as the second input values ​​for PID calculation, and multiple second output values ​​P are obtained through PID calculation. 2m Where m is 1, 2, ..., m;

[0012] Calculate the second fitted value S2 = P1 × C + P 2m ×D, in addition, C is the coefficient of the first output value, and D is the coefficient of the second output value;

[0013] The wind speed V of each fan group is controlled according to the second fitted value S2.

[0014] Beneficial effects: This invention uses multiple fan groups to dissipate heat from multiple batteries in each battery placement area, removing heat from multiple batteries. Based on the ambient temperature of the capacity testing equipment and the temperature of each battery, a PID temperature control method is used to adjust the wind speed of each fan group in real time, which has a good heat dissipation effect and can make the temperature of multiple batteries tend to be consistent. It realizes multi-variable control capability, increases the controllability and flexibility of battery temperature, and thus helps to improve the accuracy of battery capacity measurement. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic flowchart of a temperature control method for a capacity-distribution device according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of a capacity-sharing device according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Equipment body; 2. Fan assembly; 3. Battery placement area; 4. Battery; 5. Heat exchange device; 501. Heat exchange air duct; 502. Heat exchanger; 503. Water inlet pipe; 504. Water outlet pipe; 505. Flow valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The following is combined with Figures 1 to 2 The following describes embodiments of the present invention.

[0022] According to embodiments of the present invention, in one aspect, such as Figure 1 As shown, a temperature control method for a capacity grading device is provided. The capacity grading device includes: a device body 1, multiple fan groups 2 and multiple battery placement areas 3. The multiple fan groups 2 are located at the bottom of the device body 1. The multiple battery placement areas 3 are located inside the device body 1 and above the multiple fan groups 2. Each battery placement area 3 is used to place a battery 4, and each fan group 2 corresponds to one battery placement area 3.

[0023] Temperature control methods for capacity-distributing equipment include:

[0024] S100: Multiple fan groups 2 are used to dissipate heat from the batteries 4 in each battery placement area 3.

[0025] S200: Obtain the ambient temperature X1 of the capacity testing equipment, the temperature of each battery 4, and calculate the average temperature X2 of each battery 4, as well as the average temperature X of the battery 4 in each battery placement area 3. 3n , where n is 1, 2, ..., n, and the unit of temperature is degrees Celsius.

[0026] S300. Calculate the first fitted value S1 = X1 × A + X2 × B, where A is the ambient temperature coefficient and B is the battery temperature coefficient.

[0027] S400. The difference between the first fitted value S1 and the preset target value is used as the first input value for PID calculation, and the first output value P1 is obtained through PID calculation. The preset target value is a pre-set standard temperature value, and the pre-set standard temperature value is within the range of 25±2℃. The calculation result of the first output value P1 is between 0 and 1, that is, between 0% and 100%.

[0028] S500, the average temperature X of batteries 4 in each battery placement area 3 3n The difference between each of the four battery temperatures and the mean value X2 is calculated to obtain multiple difference values. These multiple differences are then used as the second input values ​​for PID calculation, resulting in multiple second output values ​​P. 2mWhere m is 1, 2, ..., m. The second output value P 2m The calculation result ranges from 0 to 1, that is, from 0% to 100%.

[0029] S600, Calculate the second fitted value S2 = P1×C + P 2m ×D, where C is the coefficient of the first output value, D is the coefficient of the second output value, and the calculation result of the second fitted value S2 is between 0 and 1, that is, between 0% and 100%.

[0030] S700: Control the wind speed V of each fan group 2 according to the second fitted value S2.

[0031] The capacity testing equipment temperature control method provided in this embodiment of the invention uses multiple fan groups 2 to dissipate heat from multiple batteries 4 in each battery placement area 3, removing the heat from the multiple batteries 4. Based on the ambient temperature of the capacity testing equipment and the temperature of each battery 4, a PID temperature control method is adopted to adjust the wind speed of each fan group 2 in real time, which has a good heat dissipation effect, can make the temperature of multiple batteries 4 tend to be consistent, realizes multi-variable control capability, increases the controllability and flexibility of battery 4 temperature, and thus helps to improve the accuracy of battery 4 capacity measurement.

[0032] Specifically, the PID (Proportional-Integral-Derivative) calculation steps adopt existing PID algorithm steps. This embodiment of the invention does not impose excessive restrictions on this, as the PID calculation process is simple, highly accurate, and flexible in use. In step S200, the ambient temperature of the capacity testing device can be detected by an ambient temperature sensor, and the temperature of each battery 4 can be detected by a battery temperature sensor. Multiple ambient temperature sensors can be set, and the average of the temperature values ​​detected by multiple ambient temperature sensors is used as the ambient temperature of the capacity testing device to improve the accuracy of ambient temperature detection.

[0033] In addition, the ambient temperature X1 of the capacity testing equipment ranges from 22°C to 28°C, and the average temperature X2 of each battery 4 ranges from 23°C to 45°C. Similarly, the average temperature X of each battery 4 in each battery placement area 3 is... 3n The temperature range is from 23°C to 45°C.

[0034] Specifically, the correspondence between the battery placement area 3 and the tray can be selected and set as needed. For example, multiple battery placement areas 3 are provided in the device body 1, and one battery placement area 3 includes a tray fully loaded with batteries 4; or one battery placement area 3 includes multiple trays fully loaded with batteries 4; or a tray fully loaded with batteries 4 includes multiple groups of batteries 4, and one battery placement area 3 includes one group of batteries 4, with each group of batteries 4 including at least one battery 4.

[0035] It should be noted that the ambient temperature sensor and battery temperature sensor in the embodiments of the present invention can be selected from existing conventional temperature sensors as needed, and the embodiments of the present invention do not impose too many restrictions on this.

[0036] In one embodiment, the formula for calculating the wind speed V of each fan group 2 is as follows: V = V min +(V max -V min )×S2, in addition, V min V is the minimum wind speed of fan group 2. max This is the maximum wind speed of fan group 2.

[0037] According to the above formula, the second fitted value S2 is proportional to the wind speed V of fan group 2. By calculating and controlling the wind speed through the second fitted value S2, precise control of the wind speed can be achieved.

[0038] For example, the minimum wind speed V of the preset fan group 2 is... min 100 RPM, maximum wind speed V max It is 2000 RPM.

[0039] When the second fitted value S2 is calculated to be 0%, the wind speed of fan group 2 is V = 100 RPM + (2000 RPM - 100 RPM) × 0% = 100 RPM.

[0040] When the second fitted value S2 is calculated to be 50%, the wind speed of fan group 2 is V = 100 RPM + (2000 RPM - 100 RPM) × 50% = 1050 RPM.

[0041] When the second fitted value S2 is calculated to be 100%, the wind speed of fan group 2 is V = 100 RPM + (2000 RPM - 100 RPM) × 100% = 2000 RPM.

[0042] In one embodiment, step S300, calculating the first fitted value S1 = X1 × A + X2 × B, further includes: A satisfying 0.2 ≤ A ≤ 0.9, and B satisfying 0.1 ≤ B ≤ 0.8. For example, A can be 0.2, 0.3, 0.7, 0.9, etc., and B can be 0.1, 0.3, 0.7, etc.

[0043] In some other embodiments, the ambient temperature of the capacity grading device is collected in multiple ways, and the first fitted value S1 = M1 × A + M2 × B, where M1 is the median of each ambient temperature and M2 is the median of each battery 4 temperature, in order to simplify the calculation process.

[0044] In addition, in step S200, after obtaining the ambient temperature X1 of the capacity testing device and the temperature of each battery 4, the median temperature M of the battery 4 in each battery placement area 3 is selected. 3n , where n is 1, 2, ..., n, and the unit of temperature is degrees Celsius.

[0045] In step S400, the median temperature M of the batteries 4 in each battery placement area 3 is set. 3n The difference between each temperature and the median temperature M2 of each battery 4 is calculated to obtain multiple difference values. These multiple differences are used as the second input values ​​for PID calculation, and multiple second output values ​​P are obtained through PID calculation. 2m .

[0046] In one embodiment, S600, calculate the second fitted value S2 = P1 × C + P 2m ×D also includes: C satisfies 0.2≤C≤0.8, and D satisfies 0.2≤D≤0.8. For example, C can be 0.2, 0.3, 0.8, etc., and B can be 0.2, 0.3, 0.7, etc.

[0047] In one embodiment, the temperature control method for the capacity-limiting device further includes:

[0048] S800 delivers cold air to multiple fan groups 2 through heat exchange device 5 and exchanges heat with hot air.

[0049] S900: Control the opening degree of the flow valve 505 on the heat exchange device 5 according to the first output value P1.

[0050] The heat exchange capacity of the heat exchange device 5 can be controlled by the flow valve 505. The opening degree of the flow valve 505 is controlled according to the first output value P1, which can further accurately control the heat dissipation effect of the battery 4 and improve the temperature consistency among the batteries 4.

[0051] Furthermore, in one embodiment, S900, controlling the opening degree of the flow valve 505 on the heat exchange device 5 according to the first output value P1, specifically includes:

[0052] S910. The first output value P1 is converted into a voltage value U through the voltage conversion module. The voltage value U is matched with the opening degree of the flow valve 505.

[0053] Specifically, the voltage conversion module calculates the voltage value U based on the first output value P1, converts P1 into U, and inputs the corresponding voltage value to the flow valve 505. The flow valve 505 is a solenoid valve; different input voltages control its opening degree. The opening degree of the flow valve 505 refers to the extent to which it is open, i.e., the size of the flow passage inside the valve. It indicates the degree of openness of the flow valve 505 when controlling fluid flow, and is usually expressed as a percentage. For example, 100% opening means the flow valve 505 is fully open, and the fluid flow is at its maximum; while 0% opening means the flow valve 505 is completely closed.

[0054] S920. Adjust the opening of the flow valve 505 according to the magnitude of the converted voltage value U.

[0055] It should be noted that the voltage value U is directly proportional to the opening degree of the flow valve 505. Different voltage values ​​U correspond to different opening degrees of the flow valve 505, and the specific correspondence can be selected and set according to actual needs.

[0056] For example, the preset voltage value U ranges from 0 volts to 10 volts, and the opening degree of the flow valve 505 ranges from 0.5% to 100%.

[0057] When the first output value P1 is calculated to be 0%, the voltage value U converted by the voltage conversion module is 0 volts, corresponding to the opening degree of the flow valve 505 being 0.5%.

[0058] When the first output value P1 is calculated to be 50%, the voltage value U converted by the voltage conversion module is 5 volts, corresponding to the opening degree of the flow valve 505 being 50.25%.

[0059] When the first output value P1 is calculated to be 100%, the voltage value U converted by the voltage conversion module is 10 volts, corresponding to the opening degree of the flow valve 505 being 100%.

[0060] In one embodiment, the heat exchange device 5 includes a heat exchange duct 501 and a heat exchanger 502. The heat exchange duct 501 is located on the side of the device body 1. The heat exchanger 502 is located inside the heat exchange duct 501, and its two ends are respectively connected to an inlet pipe 503 and an outlet pipe 504.

[0061] Further, step S800, which involves supplying cold air to multiple fan groups 2 through the heat exchange device 5 and exchanging heat with the hot air, specifically includes:

[0062] S810, the outlet of the heat exchange duct 501 is directed toward multiple fan groups 2 and delivers cold air, while the inlet of the heat exchange duct 501 receives hot air.

[0063] S850: Heat exchanger 502 exchanges heat with the hot air in heat exchange duct 501 and generates cold air.

[0064] Specifically, cooling water is introduced into the heat exchanger 502 through the inlet pipe 503. The cooling water exchanges heat with the hot air at the heat exchanger 502, resulting in hot water flowing out through the outlet pipe 504. The hot air, after passing through the heat exchanger 502, becomes cold air. This cold air is blown towards multiple fan groups 2, and then, under the action of the fan groups 2, flows upward, carrying away heat from the multiple batteries 4 to lower their temperature. The hot air then accumulates at the top of the device body 1. Afterward, the hot air enters the heat exchange duct 501, undergoes heat exchange in the heat exchanger 502, and then reforms into cold air, entering the receiving cavity to form a heat dissipation cycle.

[0065] In one embodiment, the temperature control method for the capacity-distributing device further includes:

[0066] S1000: Obtain the historical average values ​​of the ambient temperature and the temperature of each battery 4 in the previous cycle of the capacity grading device. The previous cycle can be selected and set as needed, such as one day, one week, or one month.

[0067] S1100. Based on the historical average and the preset target value, the preset target value is adjusted.

[0068] Furthermore, in one embodiment, S1100, based on the magnitude of the historical average and the preset target value, the preset target value is corrected, specifically including:

[0069] S1110. When the historical average value is greater than the preset target value, it means that the temperature of the preset target value is greater than the cooling capacity of the capacity-distribution equipment. Therefore, the preset target value needs to be corrected upward and the preset target value needs to be increased.

[0070] S1120. When the historical average value is less than the preset target value, it means that the cooling capacity of the capacity-distribution equipment is greater than the preset target temperature. Therefore, the preset target value needs to be adjusted downward and the preset target value should be reduced.

[0071] By adjusting the preset target value to be consistent with the historical average, the temperature consistency of battery 4 is further ensured, thereby improving the accuracy of battery 4 capacity measurement.

[0072] It should be noted that the preset target value must be within the preset standard temperature range. In step S1100, the correction of the preset target value must not cause it to exceed the standard temperature range. For example, if the standard temperature range is 25±2℃, in step S1110, the preset target value cannot be increased by more than 27℃, and in step S1120, the preset target value cannot be decreased below 23℃.

[0073] In one embodiment, S100, which utilizes multiple fan groups 2 to dissipate heat from the batteries 4 in multiple areas within the capacity-balancing device, further includes:

[0074] S110, Each fan group 2 includes at least one fan.

[0075] Specifically, each battery placement area 3 is equipped with at least one battery 4, that is, at least one fan can be used to cool one battery 4 to improve the heat dissipation effect of the battery 4 and ensure the temperature consistency of multiple batteries 4. Of course, multiple batteries 4 can also be set in one battery placement area 3 and correspond to one fan group 2. For example, a pair of batteries 4 can be set in the battery placement area 3 and one fan group 2 can be used to cool the pair of batteries 4.

[0076] According to an embodiment of the present invention, on the other hand, such as Figure 2 As shown, a capacity-sharing device is also provided, including: a device body 1, multiple fan groups 2, and multiple battery placement areas 3. The multiple fan groups 2 are located at the bottom of the device body 1. The multiple battery placement areas 3 are located inside the device body 1 and above the multiple fan groups 2. Each battery placement area 3 is used to place a battery 4, and each fan group 2 corresponds to one battery placement area 3.

[0077] The capacity testing device provided in this embodiment of the invention uses multiple fan groups 2 to dissipate heat from multiple batteries 4 in each battery placement area 3, removing the heat from the multiple batteries 4. Based on the ambient temperature of the capacity testing device and the temperature of each battery 4, a PID temperature control method is used to adjust the wind speed of each fan group 2 in real time, which has a good heat dissipation effect and can make the temperature of multiple batteries 4 tend to be consistent. It realizes the controllability and flexibility of battery 4 temperature, thereby improving the accuracy of battery 4 capacity measurement.

[0078] Specifically, such as Figure 2 As shown, the capacity testing equipment also includes a heat exchange device 5. The heat exchange device 5 is located on the equipment body 1. The equipment body 1 has multiple battery placement areas 3, and each battery placement area 3 contains a battery 4. The heat exchange device 5 is used to deliver cool air to the batteries 4 in the multiple battery placement areas 3 through multiple fan groups 2, and to exchange heat with the hot air.

[0079] In one embodiment, such as Figure 2As shown, the heat exchange device 5 includes: a heat exchange duct 501, a heat exchanger 502, an inlet pipe 503, and an outlet pipe 504. The heat exchange duct 501 is located on the side of the equipment body 1. The heat exchanger 502 is located inside the heat exchange duct 501. The heat exchange duct 501 is located on the outside of the equipment body 1. The inlet pipe 503 is connected to the inlet end of the heat exchanger 502 and is used to input cold water. The outlet pipe 504 is connected to the outlet end of the heat exchanger 502 and is used to output the hot water formed after heat exchange between the heat exchanger 502 and hot air. A flow valve 505 is provided on the inlet pipe 503, and the opening degree of the flow valve 505 is adjustable.

[0080] Specifically, cooling water is introduced into the heat exchanger 502 through the inlet pipe 503. The temperature of the cooling water is approximately 16°C to 18°C. The cooling water exchanges heat with the hot air at the heat exchanger 502, resulting in hot water flowing out from the outlet pipe 504. The hot air, after passing through the heat exchanger 502, becomes cold air. This cold air is blown towards multiple fan groups 2, and then, under the action of the fan groups 2, flows upward, carrying away heat from the multiple batteries 4 to lower their temperature. The hot air then accumulates at the top of the device body 1. Afterward, the hot air enters the heat exchange duct 501, undergoes heat exchange in the heat exchanger 502, and then reforms into cold air, entering the receiving cavity to form a heat dissipation cycle.

[0081] Furthermore, the water flow rate in the inlet pipe 503 and outlet pipe 504 depends on the number of batteries 4, the charging and discharging current specifications, and the internal resistance of the batteries 4. The "heat absorption" of the cooling water in the inlet pipe 503 and outlet pipe 504 needs to balance the "heat generation" of the batteries 4. In this embodiment of the invention, the flow rate of the cooling water in the inlet pipe 503 and outlet pipe 504 is controlled by adjusting the opening of the flow valve 505, thereby stabilizing the temperature of the batteries 4.

[0082] Furthermore, in one embodiment, the inlet pipe 503 and the outlet pipe 504 can also be connected to other heat exchange devices to form a heat exchange cycle, thereby improving the heat exchange capacity of the heat exchanger 502.

[0083] To achieve the basic functions of the capacity-sharing device, the capacity-sharing device in this embodiment may also include other necessary modules or components, such as a power supply system and a control system. It should be noted that any suitable existing structure can be selected from the other necessary modules or components included in the capacity-sharing device. To clearly and concisely illustrate the technical solution provided in this embodiment, the above-mentioned parts will not be repeated here, and the accompanying drawings have also been simplified accordingly. However, it should be understood that the scope of the embodiments of the present invention is not limited thereto.

[0084] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A temperature control method for a capacity-distribution device, characterized in that, The capacity testing device includes: a device body (1), multiple fan groups (2) and multiple battery placement areas (3), wherein the multiple fan groups (2) are located at the bottom of the device body (1); the multiple battery placement areas (3) are located inside the device body (1) and above the multiple fan groups (2), each battery placement area (3) is used to place a battery (4), and each fan group (2) corresponds to one battery placement area (3); The temperature control method for the capacity-distribution equipment includes: Multiple fan groups (2) are used to dissipate heat from the batteries (4) in each of the battery placement areas (3); Obtain the ambient temperature X1 of the capacity testing device, the temperature of each battery (4), and calculate the average temperature X2 of each battery (4) and the average temperature X of the batteries (4) in each battery placement area (3). 3n Where n is 1, 2, ..., n, and the unit of temperature is degrees Celsius; Calculate the first fitted value S1 = X1 × A + X2 × B, where A is the ambient temperature coefficient and B is the battery temperature coefficient. The difference between the first fitted value S1 and the preset target value is used as the first input value for PID calculation, and the first output value P1 is obtained by PID calculation; the preset target value is a pre-set standard temperature value. The average temperature of the batteries (4) in each of the battery placement areas (3) is X 3n The difference between each of the battery (4) and the mean temperature X2 is calculated to obtain multiple difference values. These multiple difference values ​​are used as the second input values ​​for PID calculation, and multiple second output values ​​P are obtained through PID calculation. 2m Where m is 1, 2, ..., m; Calculate the second fitted value S2 = P1 × C + P 2m ×D, in addition, C is the coefficient of the first output value, and D is the coefficient of the second output value; The wind speed V of each fan group (2) is controlled according to the second fitted value S2.

2. The temperature control method for a capacity-distribution device according to claim 1, characterized in that, The formula for calculating the wind speed V of each of the fan groups (2) is as follows: V = V min +(V max -V min )×S2, in addition, V min V is the minimum wind speed of fan assembly (2). max The maximum wind speed of fan assembly (2) is given.

3. The temperature control method for a capacity-distribution device according to claim 1, characterized in that, The calculation of the first fitted value S1=X1×A+X2×B also includes: A satisfies 0.2≤A≤0.9, and B satisfies 0.1≤B≤0.

8.

4. The temperature control method for a capacity-distribution device according to claim 1, characterized in that, The calculation of the second fitted value S2 = P1 × C + P 2m ×D, also includes: C satisfies 0.2≤C≤0.8, D satisfies 0.2≤D≤0.

8.

5. The temperature control method for a capacity-distribution device according to any one of claims 1 to 4, characterized in that, Also includes: Cool air is delivered to multiple fan groups (2) through a heat exchange device (5), and the hot air is exchanged for heat. The opening degree of the flow valve (505) on the heat exchange device (5) is controlled according to the first output value P1.

6. The temperature control method for a capacity-distribution device according to claim 5, characterized in that, The step of controlling the opening degree of the flow valve (505) on the heat exchange device (5) according to the first output value P1 specifically includes: The first output value P1 is converted into a voltage value U by a voltage conversion module, and the voltage value U corresponds to and matches the opening degree of the flow valve (505). The opening of the flow valve (505) is adjusted according to the magnitude of the converted voltage value U.

7. The temperature control method for a capacity-distribution device according to claim 5, characterized in that, The heat exchange device (5) includes: a heat exchange duct (501) and a heat exchanger (502). The heat exchanger (502) is located in the heat exchange duct (501) and is connected to an inlet pipe (503) and an outlet pipe (504) at opposite ends. The process of supplying cold air to multiple fan groups (2) through the heat exchange device (5) and exchanging heat with the hot air specifically includes: The outlet of the heat exchange duct (501) is directed toward the plurality of fan groups (2) and delivers cold air, while the inlet of the heat exchange duct (501) receives hot air. The heat exchanger (502) exchanges heat with the hot air in the heat exchange duct (501) and generates cold air.

8. The temperature control method for a capacity-distribution device according to any one of claims 1 to 4, characterized in that, Also includes: Obtain the historical average values ​​of the ambient temperature and the temperature of each battery (4) in the previous cycle of the capacity testing equipment; The preset target value is adjusted based on the magnitude of the historical average and the preset target value.

9. The temperature control method for a capacity-distribution device according to claim 8, characterized in that, The step of adjusting the preset target value based on the magnitude of the historical average and the preset target value specifically includes: When the historical average is greater than the preset target value, the preset target value is increased. When the historical average is less than the preset target value, the preset target value is reduced.

10. The temperature control method for a capacity-distribution device according to any one of claims 1 to 4, characterized in that, The method of using multiple fan groups (2) to dissipate heat from the batteries (4) in each of the battery placement areas (3) includes: each fan group (2) includes at least one fan.

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