A temperature control system and method for a battery formation and dispensing device

Abstract

The application discloses a temperature control system and method of battery formation and component distribution equipment, which comprises a combined rack, a plurality of temperature control boxes with battery detection areas inside are arranged on the rack, a plurality of temperature control mechanisms are arranged in the temperature control boxes respectively and comprise heat exchangers and a plurality of speed-regulating fans, a common cold and hot medium pipeline is provided with a hot medium pipeline with a first electric proportional valve and a cold medium pipeline with a second electric proportional valve, the two pipelines are combined to form a liquid supply main pipeline and are connected to the heat exchangers respectively, a temperature acquisition module comprises a plurality of environment temperature sensors arranged in the temperature control boxes, and a controller, the controller calculates the regional average temperature and the global environment temperature of each temperature control box according to the environment temperature data, determines a target adjustment box when the regional average temperature of the temperature control box deviates from the global environment temperature by more than a preset deviation threshold, and controls the speed-regulating fan of the target adjustment box to adjust the rotating speed, and adjusts the opening degrees of the first and second electric proportional valves when the deviation between the global environment temperature and a target reference temperature reaches a set threshold.

Description

Technical Field

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

[0002] During the battery formation and capacity testing process, the battery continuously generates heat. To ensure the accuracy of the test results, the battery is usually placed in a constant temperature environment for capacity testing. Therefore, battery formation and capacity testing equipment typically has multiple independently operating temperature-controlled chambers, and the internal temperature of each chamber is controlled through heat exchangers, fans, and heat exchange medium pipelines.

[0003] In existing technologies, temperature control for multiple temperature control chambers typically employs a centralized liquid supply regulation method. This involves adjusting the supply temperature or flow rate of the heat exchange medium based on the overall temperature status of the equipment to achieve temperature control. However, during actual operation, temperature deviations can easily occur between different temperature control chambers due to differences in the number of batteries loaded, their heating state, and airflow conditions. Current control methods usually adjust the overall temperature based on the detected temperature. When temperature deviations occur in some temperature control chambers, it becomes difficult to adjust those chambers specifically, thus affecting the overall temperature control effect across multiple chambers. Summary of the Invention

[0004] In order to overcome the technical defects of the prior art, which makes it difficult to independently adjust the chamber with temperature deviation while taking into account the overall temperature control, the present invention provides a temperature control system and method for a battery formation and capacity testing device.

[0005] To solve the above problems, the present invention is implemented according to the following technical solution:

[0006] The temperature control system of the battery formation and capacity testing equipment of the present invention includes:

[0007] A modular frame, on which multiple temperature control chambers are mounted;

[0008] Multiple temperature control mechanisms are respectively disposed in each of the temperature control boxes. Each temperature control mechanism includes a heat exchanger and multiple speed-regulating fans. The speed-regulating fans are used to drive airflow through the heat exchanger and circulate within the corresponding temperature control box.

[0009] A common hot and cold medium pipeline includes a hot medium pipeline and a cold medium pipeline. The hot medium pipeline is equipped with a first electric proportional valve, and the cold medium pipeline is equipped with a second electric proportional valve. The first electric proportional valve and the second electric proportional valve are used to regulate the flow rate of the corresponding medium. The hot medium pipeline and the cold medium pipeline merge to form a liquid supply main pipeline. The liquid supply main pipeline is connected to each heat exchanger. A flow meter is installed at the liquid inlet of each heat exchanger. The flow meter is used to detect the flow rate of the medium flowing into the corresponding heat exchanger.

[0010] A temperature acquisition module, comprising multiple ambient temperature sensors respectively disposed within each of the temperature control chambers, wherein the ambient temperature sensors are used to acquire ambient temperature data within the corresponding temperature control chamber.

[0011] The controller is electrically connected to the ambient temperature sensor, the first electric proportional valve, the second electric proportional valve, and the speed-regulating fan. The controller is used to determine the regional average temperature and global ambient temperature of each temperature control chamber based on ambient temperature data collected by multiple ambient temperature sensors; to determine the target control chamber based on the deviation between the regional average temperature of each temperature control chamber and the global ambient temperature, and to control the speed-regulating fan corresponding to the target control chamber to adjust the airflow within the corresponding temperature control chamber; and to adjust the opening of the first electric proportional valve and the second electric proportional valve based on the deviation between the global ambient temperature and the target reference temperature to change the flow rate of the hot and cold medium pipelines, thereby adjusting the temperature of the medium supplied to each heat exchanger.

[0012] In conjunction with the first aspect, the controller is also used to calculate the regional average temperature of the temperature control chamber and the internal temperature difference value of the chamber based on the ambient temperature data collected by multiple ambient temperature sensors within the same temperature control chamber, and to use the temperature difference value as a parameter for adjusting the speed of the speed-regulating fan within the temperature control chamber.

[0013] In conjunction with the first aspect, each of the multiple speed-regulating fans in the temperature control box includes a first fan unit disposed on the surface of the heat exchanger, and a second fan unit disposed on the inner walls of both sides of the temperature control box.

[0014] The first fan unit is used to adjust the deviation between the regional average temperature of the corresponding temperature control box and the target reference temperature; the second fan unit is used to reduce the temperature difference between the data collected by the ambient temperature sensors at various locations inside the corresponding temperature control box.

[0015] In conjunction with the first aspect, when the controller adjusts the speed of the speed-regulating fan inside the target regulating box:

[0016] When the average temperature of the target regulating box is higher than the target reference temperature, increase the speed of the first fan unit and the second fan unit inside the target regulating box.

[0017] When the average temperature of the target regulating box area is lower than the target reference temperature, reduce the speed of the first fan unit and the second fan unit inside the target regulating box.

[0018] In conjunction with the first aspect, the controller reduces the regional average temperature deviation between different temperature control chambers by independently adjusting the speed-regulating fans in each temperature control chamber.

[0019] When the global ambient temperature deviates from the target reference temperature by a set threshold, the controller adjusts the inlet medium temperature of each heat exchanger by adjusting the opening of the first electric proportional valve and the second electric proportional valve.

[0020] In conjunction with the first aspect, the controller is also used to adjust the opening degree of the first electric proportional valve and the second electric proportional valve according to the temperature difference between the global ambient temperature and the target reference temperature.

[0021] When the global ambient temperature is higher than the target reference temperature, the opening degree of the first electric proportional valve is smaller than that of the second electric proportional valve.

[0022] When the global ambient temperature is lower than the target reference temperature, the opening degree of the second electric proportional valve is less than that of the first electric proportional valve.

[0023] In conjunction with the first aspect, after the first and second electric proportional valves are opened, the controller calculates the target speed of each speed-regulating fan in the target regulating box according to the following formula:

[0024]

[0025] Where Y is the target speed percentage of the target speed-regulating fan, and the calculation result is limited to between 0 and 100%, T1 is the regional average temperature of the temperature control box, T2 is the target reference temperature, K is the preset fixed attenuation constant, and Y0 is the preset base speed percentage.

[0026] The second aspect of the present invention provides a temperature control method for a battery formation and capacity testing device, applied to a temperature control system for a battery formation and capacity testing device as described in any one of the first aspects of the present invention. The system includes a modular frame, multiple temperature control chambers mounted on the frame, a temperature control mechanism mounted in each temperature control chamber, a common hot and cold medium pipeline, and a controller. The temperature control mechanism includes a heat exchanger and multiple variable-speed fans. The common hot and cold medium pipeline includes a hot medium pipeline and a cold medium pipeline connected to each heat exchanger. A first electric proportional valve is provided on the hot medium pipeline, and a second electric proportional valve is provided on the cold medium pipeline. The method includes the following steps:

[0027] Obtain the current formation and capacity control process command and determine the corresponding target reference temperature;

[0028] In the initial stage of regulation, before the first and second electric proportional valves are opened for the first time, the speed-regulating fans inside all temperature control boxes are controlled to operate.

[0029] The system acquires ambient temperature data from multiple ambient temperature sensors inside each temperature control chamber in real time, calculates the regional average temperature of each temperature control chamber, and calculates the global ambient temperature.

[0030] Compare the deviation between the regional average temperature of each temperature control box and the global ambient temperature, identify the temperature control box whose regional average temperature deviates from the global ambient temperature by more than a preset deviation threshold as the target adjustment box, and control the speed adjustment fan in the target adjustment box to adjust its speed.

[0031] When the deviation between the global ambient temperature and the target reference temperature reaches a set threshold, the inlet medium temperature of each heat exchanger is adjusted by regulating the opening of the first electric proportional valve and the second electric proportional valve.

[0032] In conjunction with the second aspect, controlling the speed-regulating fan corresponding to the target regulating box to adjust its speed specifically includes the following steps:

[0033] Calculate the temperature difference inside the target regulating box based on the ambient temperature data collected by multiple ambient temperature sensors inside the same target regulating box.

[0034] When the average temperature of the target regulating box area is higher than the target reference temperature, increase the speed of the first fan unit inside the target regulating box; when the average temperature of the target regulating box area is lower than the target reference temperature, decrease the speed of the first fan unit.

[0035] When the temperature difference inside the target regulating box exceeds the set threshold, increase the speed of the second fan unit inside the target regulating box.

[0036] The first fan unit is installed on the surface of the heat exchanger, and the second fan unit is installed on the inner walls of both sides of the temperature control box.

[0037] In conjunction with the second aspect, the first and second electric proportional valves are simultaneously adjusted according to a preset opening degree correspondence, specifically including:

[0038] When the global ambient temperature is higher than the target reference temperature, the opening degree of the first electric proportional valve is smaller than that of the second electric proportional valve.

[0039] When the global ambient temperature is lower than the target reference temperature, the opening degree of the second electric proportional valve is less than that of the first electric proportional valve.

[0040] In conjunction with the second aspect, from the initial opening of the first and second electric proportional valves until the end of the process flow, the target speed of each speed-regulating fan in the target regulating box is calculated according to the following formula:

[0041]

[0042] Where Y is the target speed percentage of the target speed-regulating fan, and the calculation result is limited to between 0 and 100%, T1 is the regional average temperature of the temperature control box, T2 is the target reference temperature, K is the preset fixed attenuation constant, and Y0 is the preset base speed percentage.

[0043] Compared with the prior art, the beneficial effects of the present invention are:

[0044] The temperature control system of a battery formation and capacity testing device described in this invention collects ambient temperature data from each temperature control chamber to determine the regional average temperature and global ambient temperature of each chamber. Based on the deviation between the regional average temperature and the global ambient temperature, a target control chamber is identified. The speed of the corresponding variable-speed fan within the target control chamber is adjusted to specifically address local temperature deviations. Simultaneously, when the deviation between the global ambient temperature and the target reference temperature reaches a set threshold, the opening of the first and second electric proportional valves is adjusted to regulate the overall temperature of the medium supplied to each heat exchanger. By combining local temperature field regulation with overall temperature control, temperature control chambers with temperature deviations can be specifically corrected, while ensuring that the overall temperature of multiple temperature control chambers remains within the target range. This reduces temperature differences between different temperature control chambers and improves temperature consistency throughout the battery formation and capacity testing process.

[0045] The present invention discloses a temperature control method for a battery formation and capacity testing device. This method acquires real-time ambient temperature data from each temperature control chamber, calculates the regional average temperature and the global ambient temperature, and determines the target control chamber based on the deviation between the regional average temperature and the global ambient temperature. The speed of the corresponding variable-speed fan in the target control chamber is then adjusted. When the deviation between the global ambient temperature and the target reference temperature reaches a set threshold, the opening of the first and second electric proportional valves is adjusted to regulate the overall temperature of the medium supplied to each heat exchanger. By first adjusting the temperature control chambers with temperature deviations locally, and then uniformly adjusting the overall temperature, the local temperature deviation adjustment and overall temperature control work together to improve the temperature uniformity among multiple temperature control chambers, thus meeting the temperature field consistency control requirements of the battery formation and capacity testing process. Attached Figure Description

[0046] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0047] Figure 1 This is a perspective view of the overall equipment of the temperature control system of the battery formation and capacity testing device of the present invention;

[0048] Figure 2 This is a top view of the overall device of the temperature control system of the battery formation and capacity testing equipment of the present invention;

[0049] Figure 3 This is a schematic diagram of the internal structure of the temperature control box of the present invention;

[0050] Figure 4 This is a flowchart of the temperature control method for a battery formation and capacity testing device according to the present invention;

[0051] Figure 5 This is a schematic diagram showing the distribution of common hot and cold medium pipelines in the modular frame of the present invention;

[0052] Figure 6 This is another schematic diagram showing the distribution of the common hot and cold medium pipelines in the modular frame of this invention;

[0053] In the picture:

[0054] 10-Modular frame; 20-Temperature control box; 21-Battery detection area; 30-Heat exchanger; 40-Speed-regulating fan; 50-Heat medium pipeline; 51-First electric proportional valve; 60-Cold medium pipeline; 61-Second electric proportional valve; 70-Main liquid supply pipe. Detailed Implementation

[0055] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0056] Example 1

[0057] like Figures 1-6 As shown, the temperature control system of the battery formation and capacity testing equipment of the present invention includes:

[0058] A modular rack 10 is provided, on which multiple temperature control chambers 20 are provided, and each temperature control chamber 20 has a corresponding battery detection area 21 inside.

[0059] Multiple temperature control mechanisms are installed in each temperature control chamber 20. Each temperature control mechanism includes a heat exchanger 30 and multiple speed-regulating fans 40.

[0060] A common hot and cold medium pipeline 50 includes a hot medium pipeline 50 and a cold medium pipeline 60. A first electric proportional valve 51 is provided on the hot medium pipeline 50, and a second electric proportional valve 61 is provided on the cold medium pipeline 60. The hot medium pipeline 50 and the cold medium pipeline 60 merge to form a liquid supply main pipeline 70, which is connected to each heat exchanger 30.

[0061] Temperature acquisition module, which includes multiple ambient temperature sensors respectively installed in each temperature control chamber 20;

[0062] The controller is electrically connected to the ambient temperature sensor, the first electric proportional valve 51, the second electric proportional valve 61, and the speed-regulating fan 40.

[0063] The controller is used to acquire ambient temperature data collected by multiple ambient temperature sensors in each temperature control chamber 20, calculate the regional average temperature corresponding to each temperature control chamber 20, and calculate the global ambient temperature; compare the deviation between the regional average temperature of each temperature control chamber 20 and the global ambient temperature, identify the temperature control chamber 20 whose regional average temperature deviates from the global ambient temperature by more than a preset deviation threshold as the target regulating chamber, and control the speed regulation fan 40 corresponding to the target regulating chamber to adjust its speed; when the deviation between the global ambient temperature and the target reference temperature reaches the set threshold, the inlet medium temperature of each heat exchanger 30 is adjusted by adjusting the opening of the first electric proportional valve 51 and the second electric proportional valve 61.

[0064] like Figures 1 to 3 As shown, this embodiment provides a temperature control system for a battery formation and capacity testing device, including a combined frame 10, multiple temperature control mechanisms, a common hot and cold medium pipeline 50, a temperature acquisition module, and a controller.

[0065] The modular rack 10 is equipped with multiple temperature control chambers 20, each independent of the others, for accommodating batteries under test. Multiple temperature control mechanisms are located within each temperature control chamber 20, each including a heat exchanger 30 and multiple variable-speed fans 40, for independently adjusting the temperature within its corresponding chamber 20. In this embodiment, preferably, the modular rack 10 has four independent temperature control chambers 20 arranged in a matrix, such as a 2×2 array. Each temperature control chamber 20 has an independent battery detection area 21 (storage space) formed by a self-insulating structure. To achieve independent airflow circulation within each temperature control chamber 20, multiple temperature control mechanisms are located within each chamber. Specifically, each temperature control mechanism within a chamber 20 includes an independent heat exchanger 30 and multiple individually numbered variable-speed fans 40. The heat exchanger 30 can adopt a bottom-in, top-out piping arrangement to optimize heat exchange efficiency.

[0066] In terms of fluid piping layout, the system uses a common hot and cold medium pipeline 50 to supply liquid to each temperature control chamber 20. The common hot and cold medium pipeline 50 includes a hot medium pipeline 50 and a cold medium pipeline 60. A first electric proportional valve 51 is installed on the hot medium pipeline 50, and a second electric proportional valve 61 is installed on the cold medium pipeline 60. The hot medium pipeline 50 merges with the cold medium pipeline 60 after passing through the first electric proportional valve 51, and the cold medium pipeline 60 merges with the cold medium pipeline 60 after passing through the second electric proportional valve 61, forming a main liquid supply pipe 70. The main liquid supply pipe 70 is then connected to the heat exchangers 30 in each temperature control chamber 20. By adjusting the opening of the first electric proportional valve 51 and the second electric proportional valve 61, the mixing ratio of the hot and cold media in the main liquid supply pipe 70 is changed, thereby changing the temperature of the medium entering each heat exchanger 30. After passing through their respective electric proportional valves, the hot medium pipeline 50 and the cold medium pipeline 60 merge to form a main liquid supply pipeline 70. This main liquid supply pipeline 70 is then connected in parallel to the inlet of each heat exchanger 30 inside the respective temperature control enclosure 20 via branch pipelines. Furthermore, flow meters are installed on the branch pipelines connected to each heat exchanger 30, or at the inlet of each heat exchanger 30. The flow meters are electrically connected to the controller and are used to detect and provide real-time feedback of the actual flow rate parameters of the medium passing through the corresponding heat exchanger 30, enabling the controller to calculate and monitor the system's heat exchange volume.

[0067] The temperature acquisition module includes multiple ambient temperature sensors installed in each temperature control chamber 20 to collect ambient temperature data at different locations within each chamber in real time. In practice, multiple ambient temperature sensors can be arranged at the four boundaries of the internal space of each temperature control chamber 20 (such as the upper left, lower left, upper right, and lower right) to ensure that the collected ambient temperature data accurately reflects the three-dimensional temperature field distribution within the chamber.

[0068] The controller is electrically connected to the ambient temperature sensor, the first electric proportional valve 51, the second electric proportional valve 61, and the speed-regulating fan 40, and is used to execute the following control logic:

[0069] First, the controller acquires ambient temperature data in real time from multiple ambient temperature sensors within each temperature-controlled enclosure 20, calculates the regional average temperature for each enclosure 20, and then calculates the global ambient temperature based on this. It should be noted that, in the context of this invention, the regional average temperature is defined as the comprehensive temperature level of the enclosed space within an independent temperature-controlled enclosure 20. It is used to characterize the overall state of a specific enclosure and serves as the data basis for independent airflow adjustment within that enclosure. In this embodiment, the global ambient temperature can be obtained by weighted averaging of the regional average temperatures of each temperature-controlled enclosure 20. The weights can be configured according to the capacity of each enclosure or the number of sensors. For example, the arithmetic mean of the temperatures from four sensors within a single enclosure can be used to obtain the regional average temperature of that enclosure, and the global ambient temperature representing the overall environment of the entire equipment can be calculated based on the regional average temperatures of all enclosures.

[0070] The deviation between the regional average temperature of each temperature control chamber 20 and the global ambient temperature is compared. Temperature control chambers 20 whose regional average temperature deviates from the global ambient temperature by more than a preset deviation threshold are identified as target control chambers. The speed of the corresponding variable-speed fan 40 within these target control chambers is then adjusted to correct local temperature deviations. By independently adjusting the variable-speed fan 40 within each temperature control chamber 20, local temperature field correction can be achieved without affecting other normal chambers. For example, the circulating airflow can be increased for overheated chambers to interrupt heat accumulation. This process eliminates local deviations between chambers through independent airflow intervention without interfering with airflow in other temperature control chambers 20 with normal temperatures.

[0071] When the deviation between the global ambient temperature and the target reference temperature reaches a set threshold, the mixing ratio of the hot and cold media in the main liquid supply pipe 70 is changed by adjusting the opening degree of the first electric proportional valve 51 and the second electric proportional valve 61, thereby adjusting the temperature of the medium entering each heat exchanger 30 and achieving compensation and adjustment of the overall temperature field. The above control logic combines local fan adjustment with overall medium temperature adjustment, realizing hierarchical coordinated control of the temperature field of multiple temperature control chambers 20. It should be noted that in this embodiment, the controller does not directly control the inlet medium temperature of the heat exchanger 30, but rather issues opening commands to the first electric proportional valve 51 and the second electric proportional valve 61 to adjust their respective opening degrees, changing the mixing ratio of the hot and cold media in the main liquid supply pipe 70, thereby changing the final medium temperature entering each temperature control chamber 20 heat exchanger 30. This control method can smoothly raise or lower the overall system heat base, and together with the aforementioned independent adjustment of local fans, achieve balanced temperature field regulation.

[0072] In conjunction with the first aspect, the controller is also used to calculate the regional average temperature of the temperature control chamber 20 and the internal temperature difference value based on the ambient temperature data collected by multiple ambient temperature sensors within the same temperature control chamber 20, and to use the temperature difference value as a parameter for adjusting the speed of the speed-regulating fan 40 within the temperature control chamber 20.

[0073] Based on the above embodiments, this embodiment further refines the method for processing the ambient temperature data inside a single temperature control box 20. Since the heat generated by a square battery during formation or capacity testing may vary slightly depending on its placement, the controller not only needs to calculate the average temperature of the area but also calculates the internal temperature difference based on data collected by multiple ambient temperature sensors within the same temperature control box 20. Specifically, the controller can extract the highest and lowest temperatures at the four boundaries of the box and calculate the range between them as the internal temperature difference. Subsequently, the controller uses this temperature difference as an important compensation parameter for adjusting the speed of the variable-speed fan 40 within the temperature control box 20. For example, if the average temperature of a certain temperature control box 20 meets the standard but its internal temperature difference is too large, it indicates that the airflow circulation within the box is poor, creating a heat dissipation dead zone. In this case, the controller will use this temperature difference to appropriately increase the base speed of the variable-speed fan 40 within the box to improve airflow and ensure a consistent temperature field within each box.

[0074] In conjunction with the first aspect, each temperature control box 20 contains multiple speed-regulating fans 40, including a first fan unit disposed on the surface of the heat exchanger 30, and a second fan unit disposed on the inner walls of both sides of the temperature control box 20.

[0075] This embodiment further details the spatial layout and coordinated operation logic of the speed-regulating fans 40 inside the temperature control box 20. Specifically, each temperature control box 20 includes multiple speed-regulating fans 40, including a first fan group disposed on the surface of the heat exchanger 30 and second fan groups disposed on the inner walls of both sides of the temperature control box 20. In this spatial layout, the first fan group is mainly used to guide air through the heat exchanger 30 for heat exchange, thereby regulating the average temperature of the area; while the second fan group is mainly used to form a transverse airflow across the battery detection area 21 to open up the internal flow field. Based on the above layout, when the controller adjusts the speed of the speed-regulating fans 40 inside the target control box, it will independently adjust the first fan group according to the deviation of the average temperature of the area, and independently adjust the second fan group according to the temperature difference value inside the box.

[0076] In conjunction with the first aspect, when the controller adjusts the speed of the speed-regulating fan 40 inside the target regulating box:

[0077] When the average temperature of the target regulating box area is higher than the target reference temperature, increase the speed of the first fan unit inside the target regulating box.

[0078] When the average temperature of the target regulating box area is lower than the target reference temperature, reduce the speed of the first fan unit;

[0079] When the temperature difference between the data collected by the ambient temperature sensors at various locations inside the target regulating box exceeds the set threshold, the speed of the second fan unit inside the target regulating box is increased.

[0080] Based on the aforementioned spatial layout of the first and second fan units, this embodiment further details the specific execution process of the controller decoupling and independently regulating the speed-regulating fan 40 inside the target regulating box.

[0081] In actual system operation, when the controller determines that the average temperature of a certain target regulating box is higher than the set target reference temperature, it indicates that the overall heat load inside the box is large. The controller will increase the speed of the first fan unit inside the target regulating box to increase the air flow through the surface of the heat exchanger 30, increase the convective heat transfer rate between the circulating air inside the box and the medium inside the heat exchanger 30, and promote the rapid dissipation of local high temperature.

[0082] Conversely, when the average temperature of the target regulating box is lower than the target reference temperature, it indicates that there is a cold load deviation or a small heat load in the box. The controller will reduce the speed of the first fan unit to weaken the heat exchange intensity, so that the local temperature field can rise steadily and approach the target reference temperature.

[0083] Meanwhile, the controller monitors the temperature dispersion inside the enclosure in real time. When the temperature difference between the ambient temperature sensors inside the enclosure exceeds a set threshold, it indicates localized heat accumulation or uneven cooling distribution (i.e., poor temperature uniformity) within the enclosure. In this case, the controller independently increases the rotation speed of the second fan units located on both inner walls, accelerating the lateral compensation airflow across the battery detection area 21 and forcibly eliminating localized temperature dead zones. Through the decoupled control of the two fan units, the overall system temperature difference is reduced while ensuring the consistency of the temperature field within each individual enclosure.

[0084] In conjunction with the first aspect, the controller reduces the regional average temperature deviation between different temperature control boxes 20 by independently adjusting the speed-regulating fan 40 in each temperature control box 20.

[0085] When the global ambient temperature deviates from the target reference temperature to a set threshold, the controller adjusts the inlet medium temperature of each heat exchanger 30 by adjusting the opening of the first electric proportional valve 51 and the second electric proportional valve 61.

[0086] This embodiment further details the hierarchical control strategy employed by the system to address local temperature deviations and global ambient temperature fluctuations. During the operation of the battery formation and capacity testing equipment, due to differences in the heating state of the batteries within each chamber, some temperature control chambers 20 may experience temperature deviations first. To address this phenomenon, the controller in this embodiment employs a control logic that prioritizes local airflow adjustment. Specifically, the controller reduces the regional average temperature deviation between different temperature control chambers 20 by independently adjusting the speed-regulating fans 40 within each temperature control chamber 20. When a temperature deviation occurs in a certain temperature control chamber 20, the controller prioritizes changing the speed of the speed-regulating fan 40 inside that chamber, thereby increasing or decreasing the air circulation flow rate in that area to alter the local convective heat transfer rate. During this stage, the inlet medium temperature delivered from the common hot and cold medium pipeline 50 to each heat exchanger 30 remains unchanged. Therefore, this independent adjustment process only changes the heat transfer state within the target chamber and does not affect other temperature control chambers 20, thus smoothly reducing the regional average temperature deviation between different temperature control chambers 20.

[0087] As the formation and capacity-based process advances, when the overall system heat load changes, causing the global ambient temperature to deviate from the target reference temperature and the deviation reaches a set threshold, it indicates that relying solely on localized airflow adjustments is insufficient to balance the overall heat change. The controller triggers the second-level global control logic, adjusting the opening degrees of the first electric proportional valve 51 and the second electric proportional valve 61 to regulate the inlet medium temperature of each heat exchanger 30. Specifically, the controller issues opening commands to the first electric proportional valve 51 and the second electric proportional valve 61, changing the mixing ratio of the cold and hot media after merging, thus altering the medium temperature flowing into the main liquid supply pipe 70 at its source. Since the main liquid supply pipe 70 is connected to each heat exchanger 30, this operation can simultaneously increase or decrease the heat exchange baseline of all heat exchangers 30 in the temperature control chamber 20, thereby pulling the deviated global ambient temperature back to near the target reference temperature.

[0088] In conjunction with the first aspect, the controller is also used to adjust the opening degree of the first electric proportional valve 51 and the second electric proportional valve 61 according to the temperature difference between the global ambient temperature and the target reference temperature.

[0089] When the global ambient temperature is higher than the target reference temperature, the opening degree of the first electric proportional valve 51 is less than the opening degree of the second electric proportional valve 61.

[0090] When the global ambient temperature is lower than the target reference temperature, the opening degree of the second electric proportional valve 61 is less than the opening degree of the first electric proportional valve 51.

[0091] During global temperature field adjustment, the controller acquires the temperature difference between the global ambient temperature and the target reference temperature in real time. Based on this temperature difference calculation, it adjusts the opening degree of the first electric proportional valve 51 on the hot medium pipeline 50 and the second electric proportional valve 61 on the cold medium pipeline 60. Taking the first electric proportional valve 51 controlling the hot medium and the second electric proportional valve 61 controlling the cold medium as an example, the preset opening degree correspondence is shown in the table below:

[0092] Temperature range First electric proportional valve opening (heat medium) Second electric proportional valve opening (cold medium) +5℃ or above 10% 90% +2℃ to +5℃ 30% 70% -2℃ to +2℃ 50% 50% -5℃ to -2℃ 70% 30% -5℃ or less 90% 10%

[0093] In practice, when the global ambient temperature is higher than the target reference temperature, it indicates that the system is in a state of overheating and the temperature of the medium entering the heat exchanger 30 needs to be reduced. At this time, the controller outputs a command to make the opening degree of the first electric proportional valve 51 less than the opening degree of the second electric proportional valve 61.

[0094] Based on the above-mentioned preset mapping relationship, the specific control logic of the controller is as follows:

[0095] When the overall ambient temperature is higher than the target reference temperature (i.e., the temperature difference is in a positive range), it indicates that the system is in a slightly overheated state. The controller outputs a command to make the opening of the first electric proportional valve 51 smaller than the opening of the second electric proportional valve 61. For example, when the temperature difference reaches +5℃ or higher, the opening of the first electric proportional valve 51 is 10%, and the opening of the second electric proportional valve 61 is 90%; when the temperature difference shrinks to the range of +2℃ to +5℃, the opening of the first electric proportional valve 51 is adjusted to 30%, and the opening of the second electric proportional valve 61 is adjusted to 70%. In this state, a large flow of cold medium and a small flow of hot medium mix in the main supply pipe 70 to form a lower-temperature mixed medium, which then enters each heat exchanger 30. For another example, the target reference temperature is set to 45℃. If the current global ambient temperature is 47℃, the system needs to cool down. The controller controls the opening of the first electric proportional valve 51 to 20% and the opening of the second electric proportional valve 61 to 80%. The hot and cold media mix in the main supply pipe 70 and then enter the heat exchanger 30, thereby reducing the temperature of the media on the heat exchanger 30 side. Conversely, if the current global ambient temperature is 43℃, the system needs to heat up. The controller controls the opening of the first electric proportional valve 51 to 80% and the opening of the second electric proportional valve 61 to 20%. The two media mix in the main supply pipe 70 to obtain a higher temperature medium, which then enters each heat exchanger 30.

[0096] When the global ambient temperature is close to the target reference temperature, i.e., the temperature difference is in the equilibrium range of -2℃ to +2℃, the opening of the first electric proportional valve 51 and the second electric proportional valve 61 is maintained at 50%, so that the hot and cold media are mixed in an equal proportion to maintain the base medium temperature entering the heat exchanger 30.

[0097] When the global ambient temperature is lower than the target reference temperature (i.e., the temperature difference is in a negative range), it indicates that the system is in a relatively cold state. At this time, the controller outputs a command causing the opening of the second electric proportional valve 61 to be less than the opening of the first electric proportional valve 51. For example, when the temperature difference is between -5℃ and -2℃, the opening of the first electric proportional valve 51 increases to 70%, and the opening of the second electric proportional valve 61 decreases to 30%. If the temperature difference further decreases to below -5℃, the opening of the first electric proportional valve 51 increases to 90%, and the opening of the second electric proportional valve 61 decreases to 10%. At this time, a large flow of hot medium mixes with a small flow of cold medium, forming a higher-temperature mixed medium, thereby increasing the medium temperature inside the heat exchanger 30.

[0098] Through the aforementioned stepped preset opening correspondence, the controller can automatically match the non-zero mixing ratio of the two media according to the magnitude and polarity of the temperature difference. This adjustment method not only realizes the proportional mixing of the cold and hot media, but also makes the medium temperature at the inlet of heat exchanger 30 present a stepped smooth transition that matches the temperature difference, avoiding drastic fluctuations in ambient temperature caused by directly switching between a single cold medium and a single hot medium in the pipeline.

[0099] In conjunction with the first aspect, after the first electric proportional valve 51 and the second electric proportional valve 61 are opened, the controller calculates the target speed of each speed-regulating fan 40 in the target regulating box according to the following formula:

[0100]

[0101] Where Y is the target speed percentage of the target speed regulating fan 40, and the calculation result is limited to between 0 and 100%, T1 is the regional average temperature of the temperature control box 20, T2 is the target reference temperature, K is the preset fixed attenuation constant, and Y0 is the preset base speed percentage.

[0102] Specifically, the physical meaning of each parameter in the formula and the system configuration rules are as follows:

[0103] Y represents the target speed percentage of the target speed regulating fan 40: This parameter is the execution instruction ultimately issued by the controller to the fan inverter or drive module. In the program logic, this calculation result is limited to a closed interval of 0 to 100% (i.e., when the calculation result < 0, the value is 0, and the fan stops or maintains the minimum standby speed; when the calculation result > 100%, the value is 100%, and the fan operates at full load).

[0104] T1 is the regional average temperature of the temperature control chamber 20: This parameter is a real-time feedback variable, which is collected and calculated in real time by multiple ambient temperature sensors set in a specific temperature control chamber 20, and reflects the current temperature field state of the chamber.

[0105] T2 is the target reference temperature: This parameter is a process setting variable, representing the standard test temperature required for the current formation or capacity testing stage.

[0106] K is a preset fixed attenuation constant: this parameter acts as the reciprocal of the proportional gain in the algorithm, used to adjust the sensitivity or amplitude of the fan's response to temperature difference (T1-T2). The larger the K value, the smoother the fluctuation of the fan speed with the temperature difference; the smaller the K value, the more drastic the adjustment of the fan speed. This parameter can be calibrated at the factory according to the housing volume and the power of the heat exchanger.

[0107] Y0 represents a preset base speed percentage: The controller pre-configures multiple Y0 levels with different values ​​for the variable-speed fans 40 installed at different locations within the temperature control enclosure 20 to compensate for the asymmetrical resistance of the duct space. Specifically, due to the asymmetry of the internal structure of the temperature control enclosure 20, the duct resistance faced by the variable-speed fans 40 at different locations varies. If a uniform base speed is used, the actual airflow at each location will differ. By pre-configuring different Y0 levels for the variable-speed fans 40 at different locations, each variable-speed fan 40 can output a more balanced actual airflow under the same temperature difference conditions, thereby improving the uniformity of the temperature field within the enclosure. For example, in one specific embodiment, the variable-speed fan 40 located in the front area of ​​the heat exchanger 30 has lower duct resistance, so its Y0 configuration value can be lower than that of the variable-speed fan 40 located in the side wall area of ​​the enclosure, so that the actual output airflow of the two sets of fans tends to be consistent.

[0108] Based on the above parameters, the actual operating mechanism of this formula is as follows: when the average temperature T1 of the target regulating chamber is higher than the target reference temperature T2, the calculated result of (T1-T2) / K is positive, and the target speed Y increases proportionally based on the base speed Y0; when the average temperature T1 is lower than the target reference temperature T2, the calculated result of (T1-T2) / K is negative, and the target speed Y decreases proportionally based on the base speed Y0. This calculation method compensates for the difference in spatial resistance by setting different Y0 values ​​and outputs the final speed command by superimposing the temperature difference change, thereby achieving quantitative control of the speed of the speed regulating fan 40. To illustrate the calculation process of this formula more intuitively, an example is given below: Assume that the preset base speed percentage Y0 for the speed regulating fan 40 at a certain position is 50%, the set attenuation constant K is 10, and the process target reference temperature T2 is 45℃. When the average temperature of the chamber area T1 is 46℃, substituting into the formula, we get Y=60%, meaning that the output target fan speed command at this time is 60%. Conversely, when the average temperature of the area of ​​the box is T1=44℃, the formula is substituted to calculate Y==40%, and the output target fan speed command will smoothly drop back to 40%.

[0109] Example 2

[0110] The second aspect of the present invention provides a temperature control method for a battery formation and capacity testing device, applicable to the temperature control system of the battery formation and capacity testing device according to any one of the first aspects of the present invention. The system includes a combined frame 10, multiple temperature control boxes 20 disposed on the frame, a temperature control mechanism disposed in each temperature control box 20, a common hot and cold medium pipeline 50, and a controller. The temperature control mechanism includes a heat exchanger 30 and multiple variable speed fans 40. The common hot and cold medium pipeline 50 includes a hot medium pipeline 50 connected to each heat exchanger 30 and a cold medium pipeline 60. A first electric proportional valve 51 is provided on the hot medium pipeline 50, and a second electric proportional valve 61 is provided on the cold medium pipeline 60. The method includes the following steps:

[0111] Obtain the current formation and capacity control process command and determine the corresponding target reference temperature;

[0112] In the initial stage of regulation, before the first electric proportional valve 51 and the second electric proportional valve 61 are opened for the first time, the speed-regulating fans 40 inside all temperature control boxes 20 are controlled to run.

[0113] The ambient temperature data collected by multiple ambient temperature sensors in each temperature control chamber 20 is acquired in real time, the regional average temperature of each temperature control chamber 20 is calculated, and the global ambient temperature is calculated.

[0114] Compare the deviation between the regional average temperature of each temperature control box 20 and the global ambient temperature, and determine the temperature control box 20 whose regional average temperature deviates from the global ambient temperature by more than a preset deviation threshold as the target adjustment box, and control the speed adjustment fan 40 in the target adjustment box to adjust its speed.

[0115] When the deviation between the global ambient temperature and the target reference temperature reaches a set threshold, the inlet medium temperature of each heat exchanger 30 is adjusted by regulating the opening of the first electric proportional valve 51 and the second electric proportional valve 61.

[0116] In conjunction with the second aspect, the first electric proportional valve 51 and the second electric proportional valve 61 are simultaneously adjusted according to a preset opening degree correspondence, specifically including:

[0117] When the global ambient temperature is higher than the target reference temperature, the opening degree of the first electric proportional valve 51 is less than the opening degree of the second electric proportional valve 61.

[0118] When the global ambient temperature is lower than the target reference temperature, the opening degree of the second electric proportional valve 61 is less than the opening degree of the first electric proportional valve 51.

[0119] In conjunction with the second aspect, from the initial opening of the first electric proportional valve 51 and the second electric proportional valve 61 until the end of the process flow, the target speed of each speed-regulating fan 40 in the target regulating box is calculated according to the following formula:

[0120]

[0121] Where Y is the target speed percentage of the target speed regulating fan 40, and the calculation result is limited to between 0 and 100%, T1 is the regional average temperature of the temperature control box 20, T2 is the target reference temperature, K is the preset fixed attenuation constant, and Y0 is the preset base speed percentage.

[0122] like Figure 4 This embodiment provides a temperature control method for a battery formation and capacity testing device, applied to the temperature control system of the battery formation and capacity testing device described in the first aspect above. The specific operation control flow of this method is as follows:

[0123] S101 Obtain process parameters: The controller obtains the currently issued battery formation and capacity testing process command, and parses and determines the target reference temperature (T2) corresponding to the current testing stage. This temperature serves as the reference for subsequent temperature field control.

[0124] S102 Start-up Fans: In the initial stage of regulation, before the first electric proportional valve 51 on the hot medium pipeline 50 and the second electric proportional valve 61 on the cold medium pipeline 60 are opened for the first time, the controller controls the speed-regulating fans 40 inside all temperature control boxes 20 to start running and perform pre-circulation temperature equalization treatment to reduce the initial temperature difference of the air inside each box.

[0125] S103 Temperature Acquisition: During the process operation, the controller acquires ambient temperature data in real time from multiple ambient temperature sensors installed in each temperature control chamber 20.

[0126] S104 Calculate the average temperature of the area: Based on the ambient temperature data of each sensor obtained in step S103, the controller calculates the current average temperature (T1) of each temperature control box 20.

[0127] S105 Calculate the global ambient temperature: Based on the regional average temperature data of all temperature control boxes 20 obtained in step S104, the controller further calculates the global ambient temperature that reflects the overall state of the system.

[0128] S106 Determine the target control chamber: The controller compares the deviation between the regional average temperature of each temperature control chamber 20 and the global ambient temperature in real time. When it is determined that the regional average temperature of one or more temperature control chambers 20 deviates from the global ambient temperature and the deviation exceeds a preset deviation threshold, it is determined as the target control chamber.

[0129] S107 Adjusting the Fans: For the target regulating box determined in step S106, the controller controls the corresponding speed-regulating fan 40 inside the box to independently adjust its speed. Specifically, this includes: extracting the regional average temperature of the box and comparing it with the target reference temperature; when the regional average temperature is too high, increasing the speed of the first fan unit; when it is too low, decreasing the speed of the first fan unit; simultaneously, extracting the collected data from each ambient temperature sensor inside the box and comparing extreme values; when it is determined that the extreme temperature difference inside the box is greater than a set threshold, independently increasing the speed of the second fan unit inside the box.

[0130] S108 Proportional Valve: The controller monitors the deviation between the global ambient temperature and the target reference temperature in real time. When the deviation reaches a set threshold, the controller simultaneously adjusts the opening of the first electric proportional valve 51 and the second electric proportional valve 61 according to a preset opening correspondence. Specifically, the operating logic is as follows: when the global ambient temperature is higher than the target reference temperature, an output command is issued to make the opening of the first electric proportional valve 51 less than the opening of the second electric proportional valve 61; when the global ambient temperature is lower than the target reference temperature, an output command is issued to make the opening of the second electric proportional valve 61 less than the opening of the first electric proportional valve 51, thereby changing the inlet medium temperature of each heat exchanger 30.

[0131] Formula S109 calculates the target rotational speed:

[0132] From the initial opening of the first electric proportional valve 51 and the second electric proportional valve 61 until the end of the process flow, the controller adjusts the speed-regulating fans 40 in the target regulating box according to the formula. Calculate the target rotational speed.

[0133] In this calculation, the result Y is limited to between 0 and 100%; T1 is the average temperature of the area within the temperature control chamber 20; T2 is the target reference temperature; K is a preset fixed attenuation constant; and Y0 is the pre-configured base speed percentage for compensating for differences in duct resistance at different installation positions within the temperature control chamber 20. The final output speed command Y includes both the base speed used to compensate for differences in spatial resistance and the speed adjustment calculated based on the real-time temperature difference, thus achieving control of the fan speed.

[0134] Example 3

[0135] like Figure 5 and Figure 6As shown, in one embodiment, multiple temperature control chambers are arranged in a five-layer matrix structure along the vertical direction. Both the main supply pipe and the main return pipe are located at the top of the combined frame. Each layer of heat exchangers is connected in parallel to the main supply pipe and the main return pipe via supply branch pipes and return branch pipes, respectively. The main supply pipe extends vertically along the side of the frame after entering from the top of the combined frame, forming a longitudinal main supply pipe. Transverse supply branch pipes are led out at each layer, and each transverse supply branch pipe is connected to the inlet end of the corresponding heat exchanger in that layer to supply the heat exchange medium to each heat exchanger. Correspondingly, the outlet end of each heat exchanger is connected to the transverse return branch pipe, and each transverse return branch pipe merges into the longitudinal main return pipe. The heat-exchanged medium is transported to the medium outlet via the longitudinal main return pipe and returns to the circulation system to form a circulation loop. Through this piping structure, each layer of heat exchangers can simultaneously access the same medium circulation loop, realizing the distribution and recovery of the heat exchange medium among multiple temperature control chambers. Multiple temperature control boxes have heat exchangers connected in parallel to the same liquid supply main pipe and the same liquid return main pipe.

[0136] 1. Inlet side piping structure (e.g.) Figure 5 As shown): The main supply pipe (formed by the convergence of hot and cold medium pipelines) is introduced from the top right side of the modular frame, forming the cold water inlet. After its introduction, the main supply pipe extends vertically downwards along the right edge of the modular frame, forming a longitudinal main water inlet pipe that runs through all levels. In the vertical direction of the modular frame, corresponding to the temperature control box of each level, a transverse branch water inlet pipe (as shown by the green pipe in the figure) is horizontally led out from the longitudinal main water inlet pipe. This transverse branch water inlet pipe runs horizontally through all temperature control boxes of the current level and is connected in parallel to the water inlet of the heat exchangers inside each temperature control box within that level through independent branch pipes, thereby synchronously distributing the prepared mixed medium to each heat exchanger in the same level without discrimination.

[0137] 2. Outlet pipe structure (e.g.) Figure 6 As shown in the diagram): Correspondingly, at each level of the modular rack, a transverse branch water outlet pipe (shown as the light blue pipe in the diagram) is installed to collect the circulating water flowing out after heat exchange in each temperature control chamber within that level. On the other side of the modular rack away from the longitudinal inlet water main (i.e., the left edge), a vertically extending longitudinal outlet water main is installed. The ends of the transverse branch water outlet pipes at each level are connected in parallel to this longitudinal outlet water main. After heat exchange, the circulating water is collected through the longitudinal outlet water main and finally guided upwards to the circulating water outlet located at the top of the modular rack for discharge, completing the circulation of the temperature regulating medium for a single cycle.

[0138] Example 4

[0139] This embodiment further details the determination of the target regulating chamber and the fan adjustment logic in steps S104 to S107 above. It should be clarified that the regional average temperature mentioned in this invention refers to the overall average temperature inside a single independent temperature control chamber. In actual system operation, the controller obtains a set of specific temperature values ​​in real time through the temperature acquisition module for comparison. Taking a device containing four temperature control chambers as an example, suppose that at a certain moment, the average temperature of chamber A is 45.1℃, chamber B is 45.3℃, chamber C is 46.8℃, and chamber D is 45.2℃. Then the calculated global ambient temperature is 45.6℃. If the preset deviation threshold set by the system is 0.8℃, after comparison, the difference between the regional average temperature of chamber C and the global ambient temperature is 1.2℃, which exceeds the set deviation threshold. Therefore, the controller accurately determines that chamber C is the target regulating chamber. Subsequently, the controller outputs a command to increase the speed of the speed-regulating fan in chamber C alone, while the fans in chambers A, B, and D remain in their original state.

[0140] Based on the identified target temperature control chamber, the controller simultaneously monitors the temperature dispersion within each individual temperature control chamber. When the extreme temperature difference between the highest and lowest temperatures reported by multiple ambient temperature sensors within a temperature control chamber exceeds the set internal temperature difference threshold, this indicates the presence of localized overheating or undercooling areas (i.e., temperature dead zones) within the chamber.

[0141] For the identified target regulating chamber, the controller performs independent speed regulation of the local fan:

[0142] On the one hand, the first fan unit is independently controlled based on the comparison between the average temperature of the box area and the target reference temperature.

[0143] When the average temperature of the area is too high, the speed of the first fan unit installed on the surface of the heat exchanger is increased to accelerate the heat exchange and reduce the overall deviation between the average temperature of the area and the target reference temperature; when the average temperature of the area is too low, its speed is reduced in the opposite way.

[0144] On the other hand, the second fan unit is independently controlled based on the discrete temperature data inside the enclosure.

[0145] When the extreme temperature difference between the various temperature sensors inside the enclosure exceeds a set threshold, the rotation speed of the second fan unit located on both sides of the inner wall is increased to enhance the lateral airflow disturbance inside the enclosure, thereby reducing the temperature difference in the dead zone of uniform temperature within the enclosure. As the system executes the commands of the two sets of speed-regulating fans respectively, in the subsequent data acquisition cycle, the extreme temperature difference inside the enclosure read by the controller gradually decreases, while its regional average temperature gradually converges towards the global reference temperature. In the data, this presents a control process in which the local overall temperature deviation and the temperature difference at various points inside the enclosure are eliminated.

[0146] In summary, the temperature control system and method for a battery formation and capacity testing device provided by the present invention, by setting independent speed-regulating fans in multiple temperature control chambers and setting a first electric proportional valve and a second electric proportional valve on the common hot and cold medium pipeline, combines the independent air volume regulation inside the temperature control chamber with the proportional mixing regulation of the hot and cold medium in the liquid supply main pipe, which can reduce the average temperature deviation between different temperature control chambers and reduce the variation of the inlet medium temperature of the heat exchanger.

[0147] The working principle of the temperature control system and method for a battery formation and capacity testing device described in this invention is as follows: In the initial stage of regulation, before the first and second electric proportional valves open for the first time, the controller controls the speed-regulating fans inside all temperature control chambers to run first. During process operation, the controller acquires the ambient temperature data inside each temperature control chamber in real time and calculates the regional average temperature and global ambient temperature for each temperature control chamber. When the regional average temperature of a certain temperature control chamber deviates from the global ambient temperature by more than a preset deviation threshold, the controller identifies it as the target control chamber and adjusts the speed of the speed-regulating fan inside the target control chamber individually, thereby reducing the temperature deviation between different chambers by changing the local circulating air volume. When the deviation between the global ambient temperature and the target reference temperature reaches a set threshold, the controller adjusts the opening of the first and second electric proportional valves simultaneously according to a preset opening correspondence. When the overall ambient temperature is higher than the target reference temperature, the opening degree of the first electric proportional valve is controlled to be less than that of the second electric proportional valve; when the overall ambient temperature is lower than the target reference temperature, the opening degree of the second electric proportional valve is controlled to be less than that of the first electric proportional valve. This regulates the inlet medium temperature entering each heat exchanger by proportionally mixing the hot and cold media in the main supply pipe. From the opening of the first and second electric proportional valves until the end of the process, the controller continuously calculates and controls the target speed of each speed-regulating fan according to a preset formula based on the regional average temperature of each enclosure, the target reference temperature, and the pre-configured base speed percentage for different spatial locations.

[0148] Other structures of the temperature control system and method for a battery formation and capacity testing device described in this invention can be found in the prior art.

[0149] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A temperature control system for a battery formation and capacity testing device, characterized in that, include: A modular frame, on which multiple temperature control chambers are mounted; Multiple temperature control mechanisms are respectively disposed in each of the temperature control boxes. Each temperature control mechanism includes a heat exchanger and multiple speed-regulating fans. The speed-regulating fans are used to drive airflow through the heat exchanger and circulate within the corresponding temperature control box. A common hot and cold medium pipeline includes a hot medium pipeline and a cold medium pipeline. The hot medium pipeline is equipped with a first electric proportional valve, and the cold medium pipeline is equipped with a second electric proportional valve. The first electric proportional valve and the second electric proportional valve are used to regulate the flow rate of the corresponding medium. The hot medium pipeline and the cold medium pipeline merge to form a liquid supply main pipeline. The liquid supply main pipeline is connected to each heat exchanger. A flow meter is installed at the liquid inlet of each heat exchanger. The flow meter is used to detect the flow rate of the medium flowing into the corresponding heat exchanger. A temperature acquisition module, comprising multiple ambient temperature sensors respectively disposed in each of the temperature control boxes, wherein the ambient temperature sensors are used to acquire ambient temperature data within the corresponding temperature control box. The controller is electrically connected to the ambient temperature sensor, the first electric proportional valve, the second electric proportional valve, and the speed-regulating fan. The controller is used to determine the regional average temperature and global ambient temperature of each temperature control chamber based on ambient temperature data collected by multiple ambient temperature sensors; to determine the target control chamber based on the deviation between the regional average temperature of each temperature control chamber and the global ambient temperature, and to control the speed-regulating fan corresponding to the target control chamber to adjust the airflow within the corresponding temperature control chamber; and to adjust the opening of the first electric proportional valve and the second electric proportional valve based on the deviation between the global ambient temperature and the target reference temperature to change the flow rate of the hot and cold medium pipelines, thereby adjusting the temperature of the medium supplied to each heat exchanger.

2. The temperature control system for a battery formation and capacity testing device according to claim 1, characterized in that: The controller is also used to calculate the regional average temperature and the internal temperature difference of the temperature control box based on the ambient temperature data collected by multiple ambient temperature sensors inside the same temperature control box, and to use the temperature difference as a parameter for adjusting the speed of the speed-regulating fan inside the temperature control box.

3. The temperature control system for a battery formation and capacity testing device according to claim 1, characterized in that: Each of the multiple speed-regulating fans in the temperature control box includes a first fan group disposed on the surface of the heat exchanger, and a second fan group disposed on the inner walls of both sides of the temperature control box. The first fan unit is used to adjust the deviation between the regional average temperature of the corresponding temperature control box and the target reference temperature; the second fan unit is used to reduce the temperature difference between the data collected by the ambient temperature sensors at various locations inside the corresponding temperature control box.

4. The temperature control system for a battery formation and capacity testing device according to claim 3, characterized in that, When the controller adjusts the speed of the speed-regulating fan inside the target regulating box: When the average temperature of the target regulating box area is higher than the target reference temperature, increase the speed of the first fan unit inside the target regulating box. When the average temperature of the target regulating box area is lower than the target reference temperature, reduce the speed of the first fan unit; When the temperature difference between the data collected by the ambient temperature sensors at various locations inside the target regulating box exceeds the set threshold, the speed of the second fan unit inside the target regulating box is increased.

5. The temperature control system for a battery formation and capacity testing device according to claim 1, characterized in that: The controller reduces the regional average temperature deviation between different temperature control chambers by independently adjusting the speed-regulating fan in each temperature control chamber. When the global ambient temperature deviates from the target reference temperature by a set threshold, the controller adjusts the inlet medium temperature of each heat exchanger by adjusting the opening of the first electric proportional valve and the second electric proportional valve.

6. The temperature control system for a battery formation and capacity testing device according to claim 1, characterized in that: The controller is also used to adjust the opening degree of the first electric proportional valve and the second electric proportional valve according to the temperature difference between the global ambient temperature and the target reference temperature. When the global ambient temperature is higher than the target reference temperature, the opening degree of the first electric proportional valve is smaller than that of the second electric proportional valve. When the global ambient temperature is lower than the target reference temperature, the opening degree of the second electric proportional valve is less than that of the first electric proportional valve.

7. The temperature control system for a battery formation and capacity testing device according to claim 1, characterized in that: After the first and second electric proportional valves are opened, the controller calculates the target speed of each speed-regulating fan in the target regulating box according to the following formula: Where Y is the target speed percentage of the target speed-regulating fan, and the calculation result is limited to between 0 and 100%, T1 is the regional average temperature of the temperature control box, T2 is the target reference temperature, K is the preset fixed attenuation constant, and Y0 is the preset base speed percentage.

8. A temperature control method for a battery formation and capacity testing device, applied to a temperature control system for a battery formation and capacity testing device as described in any one of claims 1-7, the system comprising a modular frame, multiple temperature control chambers mounted on the frame, a temperature control mechanism mounted in each temperature control chamber, a common hot and cold medium pipeline, and a controller, wherein the temperature control mechanism comprises a heat exchanger and multiple variable speed fans, the common hot and cold medium pipeline comprises a hot medium pipeline and a cold medium pipeline connected to each heat exchanger, a first electric proportional valve is provided on the hot medium pipeline, and a second electric proportional valve is provided on the cold medium pipeline, characterized in that... The method includes the following steps: Obtain the current formation and capacity control process command and determine the corresponding target reference temperature; In the initial stage of regulation, before the first and second electric proportional valves are opened for the first time, the speed-regulating fans inside all temperature control boxes are controlled to operate. The system acquires ambient temperature data from multiple ambient temperature sensors inside each temperature control chamber in real time, calculates the regional average temperature of each temperature control chamber, and calculates the global ambient temperature. Compare the deviation between the regional average temperature of each temperature control box and the global ambient temperature, identify the temperature control box whose regional average temperature deviates from the global ambient temperature by more than a preset deviation threshold as the target adjustment box, and control the speed adjustment fan in the target adjustment box to adjust its speed. When the deviation between the global ambient temperature and the target reference temperature reaches a set threshold, the inlet medium temperature of each heat exchanger is adjusted by regulating the opening of the first electric proportional valve and the second electric proportional valve.

9. The temperature control method for a battery formation and capacity testing device according to claim 8, characterized in that, Controlling the speed-regulating fan inside the target regulating box to adjust its rotation speed specifically includes the following steps: Calculate the temperature difference inside the target regulating box based on the ambient temperature data collected by multiple ambient temperature sensors inside the same target regulating box. When the average temperature of the target regulating box area is higher than the target reference temperature, increase the speed of the first fan unit inside the target regulating box; when the average temperature of the target regulating box area is lower than the target reference temperature, decrease the speed of the first fan unit. When the temperature difference inside the target regulating box exceeds the set threshold, increase the speed of the second fan unit inside the target regulating box. The first fan unit is installed on the surface of the heat exchanger, and the second fan unit is installed on the inner walls of both sides of the temperature control box.

10. A temperature control method for a battery formation and capacity testing device according to claim 8 or 9, characterized in that: The first and second electric proportional valves are adjusted simultaneously according to a preset opening correspondence, specifically including: When the global ambient temperature is higher than the target reference temperature, the opening degree of the first electric proportional valve is smaller than that of the second electric proportional valve. When the global ambient temperature is lower than the target reference temperature, the opening degree of the second electric proportional valve is less than that of the first electric proportional valve. After the first and second electric proportional valves are opened for the first time until the end of the process, the target speed of each speed-regulating fan in the target regulating box is calculated according to the following formula: Where Y is the target speed percentage of the target speed-regulating fan, and the calculation result is limited to between 0 and 100%, T1 is the regional average temperature of the temperature control box, T2 is the target reference temperature, K is the preset fixed attenuation constant, and Y0 is the preset base speed percentage.

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