Battery cell temperature regulation system and battery cell temperature regulation method

Abstract

The application provides an electric core temperature adjusting system and method, and belongs to the technical field of electric cores. The electric core temperature adjusting system comprises: an intelligent electric core, specifically comprising an electric core body, a temperature acquisition unit and a single control unit, the single control unit being used for determining an initial electric core temperature according to the temperature acquired by the temperature acquisition unit; a single pipeline being arranged on the circumference of the intelligent electric core to circulate a temperature adjusting solution; a total control module being electrically connected with the single control unit, the total control module receiving the initial electric core temperature sent by the single control unit to generate a first control signal according to the initial electric core temperature and a preset temperature threshold; the total control module detecting the temperature of the temperature adjusting solution and sending the first control signal and the detected target solution temperature to the single control unit; a single valve being connected with the single pipeline; and the single control unit controlling the conduction state of the single valve to control the circulation state of the temperature adjusting solution. The application can improve the temperature adjusting efficiency of the electric core.

Description

Technical Field

[0001] This application relates to the field of battery cell technology, and in particular to a battery cell temperature regulation system and a battery cell temperature regulation method. Background Technology

[0002] Currently, when existing technologies regulate the temperature of battery modules composed of multiple cells, if an abnormality occurs in the battery module, the temperature of all cells in the entire battery module is typically regulated. However, this method has low efficiency in regulating the temperature of individual cells. Therefore, improving the efficiency of temperature regulation of the cells in a battery module has become an urgent technical problem to be solved. Summary of the Invention

[0003] The main objective of this application is to propose a battery cell temperature regulation system and a battery cell temperature regulation method, which aims to improve the efficiency of battery cell temperature regulation.

[0004] To achieve the above objectives, a first aspect of this application provides a cell temperature regulation system, the system comprising:

[0005] A smart battery cell includes a battery cell body, a temperature acquisition unit, and a single-cell control unit. The battery cell body is connected to the temperature acquisition unit, and the temperature acquisition unit is electrically connected to the single-cell control unit. The single-cell control unit is used to determine the initial battery cell temperature of the battery cell body based on the temperature acquired by the temperature acquisition unit.

[0006] A single-unit pipe is disposed in the circumferential direction of the smart battery cell, and the single-unit pipe is used to flow a temperature-regulating solution.

[0007] The overall control module is electrically connected to the individual cell control unit. The overall control module is used to receive the initial cell temperature and generate a first control signal based on the initial cell temperature and a preset temperature threshold. The overall control module is used to detect the temperature of the temperature-adjusting solution and adjust the temperature of the temperature-adjusting solution based on the temperature detection result to obtain a target solution temperature. The overall control module is also used to send the first control signal and the target solution temperature to the individual cell control unit.

[0008] A single-unit valve is connected to the single-unit pipeline; wherein the single-unit control unit is used to control the conduction state of the single-unit valve according to the first control signal and the target solution temperature, so as to control the flow state of the temperature-regulating solution in the single-unit pipeline.

[0009] In some embodiments, the system further includes:

[0010] A main pipeline, which is connected to the individual valve, is used to allow the temperature-regulating solution to flow into the individual pipeline through the individual valve;

[0011] A liquid delivery module is connected to the main pipeline and electrically connected to the main control module. The liquid delivery module is used to flow the temperature-regulating solution into the main pipeline and to recover the temperature-regulating solution flowing into the main pipeline and the individual pipeline.

[0012] To achieve the above objectives, a second aspect of this application provides a cell temperature regulation method, applied to the cell temperature regulation system described in the first aspect above, the method comprising:

[0013] The individual cell control unit determines the initial cell temperature of the cell body based on the temperature collected by the temperature acquisition unit, and sends the initial cell temperature to the central control module;

[0014] The master control module generates a first control signal based on the initial cell temperature and the preset temperature threshold.

[0015] The main control module detects the temperature of the temperature-adjusting solution and adjusts the temperature of the temperature-adjusting solution according to the temperature detection result to obtain the target solution temperature.

[0016] The master control module sends the first control signal and the target solution temperature to the monomer control unit;

[0017] The single-cell control unit controls the conduction state of the single-cell valve according to the target solution temperature and the first control signal to regulate the temperature of the cell body.

[0018] In some embodiments, the single-cell control unit determines the initial cell temperature of the cell body based on the temperature collected by the temperature acquisition unit, including:

[0019] The single-cell control unit acquires the internal resistance data of the battery cell body;

[0020] The single-cell control unit obtains the first cell temperature based on the cell internal resistance data.

[0021] The temperature acquisition unit acquires the temperature of the battery cell body to obtain the second battery cell temperature;

[0022] The single-cell control unit determines the initial cell temperature based on the first cell temperature and the second cell temperature.

[0023] In some embodiments, the preset temperature threshold includes a heating threshold and a cooling threshold, and the master control module generates a first control signal based on the initial cell temperature and the preset temperature threshold, including:

[0024] The overall control module calculates the average value of the initial cell temperature to obtain the target control temperature;

[0025] The central control module compares the target control temperature with the heating threshold to obtain a first comparison result.

[0026] The master control module compares the target control temperature and the cooling threshold to obtain a second comparison result.

[0027] The master control module generates the first control signal based on the first comparison result and the second comparison result.

[0028] In some embodiments, the central control module is used to detect the temperature of the temperature-regulating solution, adjust the temperature of the temperature-regulating solution according to the temperature detection result, and obtain the target solution temperature, including:

[0029] The central control module generates a second control signal based on the first comparison result and the second comparison result, and sends the second control signal to the liquid delivery module;

[0030] The main control module detects the temperature of the temperature-regulating solution in the liquid delivery module to obtain the initial solution temperature.

[0031] The master control module adjusts the temperature of the temperature-regulating solution according to the second control signal and the initial solution temperature to obtain the target solution temperature.

[0032] In some embodiments, the overall control module adjusts the temperature of the temperature-regulating solution according to the second control signal and the initial solution temperature to obtain the target solution temperature, including:

[0033] If the second control signal is a temperature regulation and heating signal, the liquid delivery module heats the temperature regulation solution according to the temperature regulation and heating signal, and the main control module detects the temperature of the temperature regulation solution after the heat regulation treatment to obtain the target solution temperature.

[0034] If the second control signal is a temperature regulation and cooling signal, the liquid delivery module performs cooling treatment on the temperature regulation solution according to the temperature regulation and cooling signal, and the main control module detects the temperature of the temperature regulation solution after cooling treatment to obtain the target solution temperature.

[0035] In some embodiments, the monomer control unit controls the conduction state of the monomer valve according to the target solution temperature and the first control signal, including:

[0036] The single-cell control unit compares the target solution temperature and the initial cell temperature to obtain a third comparison result.

[0037] The unit control unit controls the conduction state of the unit valve based on the third comparison result and the first control signal.

[0038] In some embodiments, the first control signal includes a cell heating signal and a cell cooling signal, and the individual unit control unit controls the conduction state of the individual unit valve according to the third comparison result and the first control signal, including:

[0039] If the first control signal is the cell heating signal, and the third comparison result indicates that the initial cell temperature is less than the target solution temperature, then the single-cell control unit controls the single-cell valve to be in the on state;

[0040] If the first control signal is the cell heating signal, and the third comparison result indicates that the initial cell temperature is greater than or equal to the target solution temperature, then the single-cell control unit controls the single-cell valve to be closed.

[0041] If the first control signal is the cell cooling signal, and the third comparison result indicates that the initial cell temperature is greater than the target solution temperature, then the single-cell control unit controls the single-cell valve to be in the on state;

[0042] If the first control signal is the cell cooling signal, and the third comparison result indicates that the initial cell temperature is less than or equal to the target solution temperature, then the single-cell control unit controls the single-cell valve to be closed.

[0043] In some embodiments, before the master control module generates the first control signal based on the first comparison result and the second comparison result, the method further includes:

[0044] If the first comparison result indicates that the target control temperature is greater than or equal to the heating threshold, and the second comparison result indicates that the target control temperature is less than or equal to the cooling threshold, the main control module sends a liquid recovery signal to the liquid delivery module.

[0045] The liquid delivery module recovers the temperature-regulating solution according to the liquid recovery signal.

[0046] This application proposes a battery cell temperature regulation system and a battery cell temperature regulation method. The battery cell temperature regulation system includes a smart battery cell, individual cell pipes, a central control module, and individual cell valves. The smart battery cell includes a battery cell body, a temperature acquisition unit, and an individual cell control unit. The battery cell body is connected to the temperature acquisition unit, and the temperature acquisition unit is electrically connected to the individual cell control unit. The individual cell control unit determines the initial battery cell temperature based on the temperature acquired by the temperature acquisition unit. The individual cell pipes are located circumferentially in the smart battery cell and are used to flow a temperature-regulating solution. The central control module is electrically connected to the individual cell control unit. The central control module receives the initial battery cell temperature sent by the individual cell control unit and generates a first control signal based on the initial battery cell temperature and a preset temperature threshold. The central control module detects the temperature of the temperature-regulating solution and adjusts the temperature of the solution based on the detection result to obtain a target solution temperature. The central control module also sends the first control signal and the target solution temperature to the individual cell control unit. The individual cell valves are connected to the individual cell pipes. The individual cell control unit controls the conduction state of the individual cell valves based on the first control signal and the target solution temperature to control the flow state of the temperature-regulating solution in the individual cell pipes. This application embodiment sets a corresponding individual valve for each smart cell, and controls the conduction state of the individual valves according to the first control signal sent by the central control module and the target solution temperature. This allows for targeted control of the flow state of the temperature-regulating solution in the corresponding individual cell pipeline, thereby achieving temperature regulation of the cell body. Therefore, the cell temperature regulation system according to this application embodiment can effectively improve the temperature regulation efficiency of the cell. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of a module structure of the battery cell temperature regulation system provided in an embodiment of this application;

[0048] Figure 2 This is a flowchart of a cell temperature regulation method provided in an embodiment of this application;

[0049] Figure 3 yes Figure 2 The flowchart of step S210 in the text;

[0050] Figure 4 yes Figure 2 The flowchart of step S220 in the text;

[0051] Figure 5 This is another flowchart of the cell temperature regulation method provided in the embodiments of this application;

[0052] Figure 6 yes Figure 2 The flowchart of step S230 in the text;

[0053] Figure 7 yes Figure 2 The flowchart of step S250 in the process. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0055] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0057] Currently, when existing technologies regulate the temperature of battery modules composed of multiple cells, if an abnormality occurs in the battery module, the temperature of all cells in the entire battery module is typically regulated. However, this method has low efficiency in regulating the temperature of individual cells. Therefore, improving the efficiency of temperature regulation of the cells in a battery module has become an urgent technical problem to be solved.

[0058] Based on this, embodiments of this application provide a cell temperature regulation system and a cell temperature regulation method, aiming to improve the accuracy of text sorting.

[0059] In related technologies, battery packs / modules include multiple smart cells, each corresponding to a battery. Different cell temperatures lead to varying battery discharge capacities, thus affecting battery life. This application protects the battery within its optimal operating temperature range by real-time monitoring of the internal cell temperature, thereby improving the application of battery packs / modules in electric vehicles and other devices.

[0060] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a module structure of a battery cell temperature regulation system provided in an embodiment of this application. In some embodiments, the battery cell temperature regulation system may include, but is not limited to, a smart battery cell 110, a single-unit pipe 120, a central control module 130, and a single-unit valve 140.

[0061] Specifically, the smart battery cell 110 includes a cell body 111, a temperature acquisition unit 112, and a single-unit control unit 113. The cell body 111 is connected to the temperature acquisition unit 112, and the cell body 111 is communicatively connected to the single-unit control unit 113. The temperature acquisition unit 112 is electrically connected to the single-unit control unit 113. A single-unit pipe 120 is disposed in the circumferential direction of the smart battery cell 110. The main control module 130 is electrically connected to the single-unit control unit 113, and the single-unit valve 140 is connected to the single-unit pipe 120.

[0062] It should be noted that the battery cell body 111 can be an electrochemical impedance spectroscopy (EIS) battery cell. The smart battery cell 110 can employ an embedded multi-source sensor group, which includes sensors for detecting the temperature, voltage, and current of the battery cell body 111, to achieve real-time monitoring of the operating status of the battery cell body 111.

[0063] It should be noted that the individual control unit 113 is used to determine the initial cell temperature of the cell body 111 based on the temperature collected by the temperature acquisition unit 112, and send the initial cell temperature to the main control module 130.

[0064] It should be noted that the unit pipe 120 is used to flow the temperature-regulating solution, and the flow state of the temperature-regulating solution in the unit pipe 120 is determined according to the conduction state of the unit valve 140.

[0065] It should be noted that the central control module 130 is used to receive the initial cell temperature sent by the individual cell control unit 113, and generate a first control signal based on the initial cell temperature and a preset temperature threshold. Furthermore, the central control module 130 is also used to perform temperature detection on the temperature-regulating solution, adjust the temperature of the temperature-regulating solution according to the temperature detection result to obtain the target solution temperature, and send the first control signal and the target solution temperature to the individual cell control unit 113.

[0066] It should be noted that the individual control unit 113 is used to receive the first control signal and the target solution temperature sent by the main control module 130, and control the conduction state of the individual valve 140 according to the first control signal and the target solution temperature, so as to control the flow state of the temperature-regulating solution in the individual pipeline 120, thereby realizing the temperature regulation of the smart cell 110 according to the temperature-regulating solution.

[0067] It should be noted that the temperature-regulating solution is used to adjust the temperature of the battery cell body in order to transfer heat energy.

[0068] This application embodiment sets a corresponding individual valve for each smart cell, and controls the conduction state of the individual valve according to the first control signal sent by the central control module and the target solution temperature. This allows for targeted control of the flow state of the temperature-regulating solution in the corresponding individual cell pipeline, thereby truly realizing individual temperature regulation of the cell body with abnormal temperature, improving the temperature regulation efficiency of the cell and reducing the energy consumption during temperature regulation.

[0069] Please refer to Figure 1 In some embodiments, the cell temperature regulation system may include, but is not limited to, the main pipe 150 and the liquid delivery module 160.

[0070] Specifically, the main pipeline 150 is connected to the individual valve 140, and the liquid delivery module 160 is connected to the main pipeline 150.

[0071] It should be noted that the liquid delivery module 160 is used to flow the temperature-regulating solution into the main pipe 150 and to recover the temperature-regulating solution flowing into the main pipe 150 and the individual pipe 120. The main pipe 150 is used to flow the temperature-regulating solution into the individual pipe 120 through the individual valve 140, so as to regulate the temperature of the cell body 111 according to the temperature-regulating solution in the individual pipe 120.

[0072] For example, please refer to Figure 1 The battery pack / battery module 100 includes multiple smart cells 110, a corresponding individual pipe 120 for each smart cell 110, and a corresponding individual valve 140 for each smart cell 110. The individual control unit 113 of each smart cell 110 is connected to the main control module 130. The battery pack / battery module 100 also includes a main pipe 150, a liquid delivery module 160, a main liquid inlet 170, and a main liquid outlet 180. The main pipe 150 is connected to each individual pipe 120 to allow the temperature-regulating solution in the main pipe to flow into the individual pipe through the individual valve 140 on the individual pipe 120. The liquid delivery module 160 includes an inlet pipe 161 and an outlet pipe 162, with the inlet pipe 161 connected to the main liquid inlet 170 and the outlet pipe 162 connected to the main liquid outlet 180.

[0073] Specifically, the individual control unit 113 of each smart cell 110 determines the initial cell temperature of the cell body 111 based on the temperature collected by the temperature acquisition unit 112, and sends the initial cell temperature to the main control module 130. The main control module 130 calculates the average of the initial cell temperatures to obtain the target control temperature. The main control module 130 compares the target control temperature with the heating threshold to obtain a first comparison result; the main control module 130 compares the target control temperature with the cooling threshold to obtain a second comparison result; and generates a first control signal based on the first and second comparison results. If the first comparison result indicates that the target control temperature is greater than or equal to the heating threshold, and the second comparison result indicates that the target control temperature is less than or equal to the cooling threshold, the main control module 130 sends a liquid recovery signal to the liquid delivery module 160, causing the liquid delivery module 160 to recover the temperature-regulating solution from the main liquid outlet 180 and the liquid outlet pipe 162. If the first comparison result indicates that the target control temperature is less than the heating threshold, or the second comparison result indicates that the target control temperature is greater than the cooling threshold, the main control module 130 generates a second control signal to adjust the temperature of the temperature-regulating liquid based on the first and second comparison results, and sends the second control signal to the liquid delivery module 160 for temperature adjustment. After the temperature-regulating solution is adjusted, the main control module 130 sends a liquid output signal to the liquid delivery module 160, and the liquid delivery module 160 flows the temperature-regulating solution into the main pipeline 150 through the liquid inlet pipe 161 and the main liquid inlet 170. Furthermore, the main control module 130 sends the first control signal and the target solution temperature to the individual control unit 113 of each smart cell 110 to determine whether temperature adjustment should be performed. If the cell body 111 is an abnormal smart cell 110 requiring temperature regulation, the individual control unit 113 controls the individual valve 140 of the abnormal smart cell 110 to be open according to the first control signal, so that the temperature regulating solution in the main pipe 150 enters the individual pipe 120 of the abnormal smart cell 110, so as to regulate the overall temperature of the abnormal smart cell 110 according to the temperature regulating solution. If the cell body 111 is a normal cell that does not require temperature regulation, the corresponding individual valve 140 is kept closed. The individual control unit 113 determines the initial cell temperature of the cell body 111 according to the temperature collected in real time by the temperature acquisition unit 112, and sends the initial cell temperature to the main control module 130 in real time, so that the main control module 130 generates the first control signal in real time according to the initial cell temperature and the preset temperature threshold. If the first comparison result indicates that the target control temperature is greater than or equal to the heating threshold, and the second comparison result indicates that the target control temperature is less than or equal to the cooling threshold, then the main control module 130 sends a valve closing signal to the individual control unit 113 of each smart cell 110 to close all the conducting individual valves 140.

[0074] This application embodiment sets a corresponding individual valve for each smart cell, and controls the conduction state of the individual valve according to the first control signal sent by the main control module and the target solution temperature. This allows for targeted control of the flow state of the temperature-regulating solution in the corresponding individual cell pipeline. When the individual control unit controls the individual valve to be in the conduction state, the temperature-regulating solution in the main pipeline flows into the circumferentially arranged individual pipeline of the smart cell, which can expand the contact area of ​​the cell body for temperature regulation, thereby effectively improving the efficiency of cell temperature regulation and reducing the energy consumption when regulating the cell temperature.

[0075] It should be noted that, according to a preset time interval, the individual control unit can also determine the initial cell temperature of the battery cell body based on the temperature collected by the temperature acquisition unit, and send the initial cell temperature to the main control module. No specific limitation is made here.

[0076] Please refer to Figure 2 , Figure 2 This is a flowchart of a cell temperature regulation method provided in an embodiment of this application. This cell temperature regulation method is applied to the cell temperature regulation system described in the above embodiment. In some embodiments, the cell temperature regulation method may include, but is not limited to, steps S210 to S250.

[0077] In step S210, the individual cell control unit determines the initial cell temperature of the cell body based on the temperature collected by the temperature acquisition unit, and sends the initial cell temperature to the main control module.

[0078] Step S220: The main control module generates a first control signal based on the initial cell temperature and the preset temperature threshold.

[0079] In step S230, the main control module detects the temperature of the temperature-regulating solution and adjusts the temperature of the temperature-regulating solution according to the temperature detection result to obtain the target solution temperature.

[0080] In step S240, the central control module sends the first control signal and the target solution temperature to the monomer control unit;

[0081] In step S250, the single cell control unit controls the conduction state of the single cell valve according to the target solution temperature and the first control signal, so as to adjust the temperature of the cell body according to the temperature-regulating solution.

[0082] In step S210 of some embodiments, the battery pack / battery module includes multiple smart cells, each corresponding to one battery. A temperature acquisition unit collects the temperature of the cell body in real time and uploads it to the individual cell control unit. The initial cell temperature is determined by the processing of the individual cell control unit. Then, each individual cell control unit sends the determined initial cell temperature to the central control module, which then determines the temperature status of the battery pack / battery module based on the central control module's assessment.

[0083] Please refer to Figure 3 , Figure 3 This is an optional flowchart of step S210 provided in the embodiments of this application. In some embodiments, step S210 may specifically include, but is not limited to, steps S310 to S340.

[0084] Step S310: The single cell control unit acquires the cell internal resistance data of the cell body;

[0085] Step S320: The single cell control unit obtains the temperature of the first cell based on the cell internal resistance data;

[0086] Step S330: The temperature acquisition unit acquires the temperature of the battery cell body to obtain the temperature of the second battery cell.

[0087] In step S340, the single cell control unit determines the initial cell temperature based on the first cell temperature and the second cell temperature.

[0088] In steps S310 and S320 of some embodiments, since there is a certain correlation between battery internal resistance and battery temperature—that is, at low temperatures, the battery electrochemical reaction is suppressed, and the battery internal resistance increases accordingly; at high temperatures, the rate of chemical reaction inside the battery accelerates, and the battery internal resistance decreases accordingly—this application uses a battery internal resistance measurement method to estimate the temperature change characteristics of the battery cell body inside the battery, so as to realize the measurement of cell internal resistance data.

[0089] Specifically, for example, compared to traditional battery cell modules, embodiments of this application can employ a smart battery cell based on a smart battery cell. The single-unit control unit of this smart battery cell includes a pulse excitation device, a pulse current / voltage acquisition unit, and an impedance calculation unit. Specifically, the pulse excitation device emits a first pulse signal to the battery cell body, the pulse current / voltage acquisition unit receives a second pulse signal from the battery cell body in response to the first pulse signal, and the calculation unit determines the internal resistance data of the battery cell body based on the received second pulse signal. Then, based on the internal resistance data, the calculation unit obtains the calculated temperature value of the battery cell body, which is the first battery cell temperature. Embodiments of this application can achieve real-time monitoring of the battery cell temperature.

[0090] In step S330 of some embodiments, the temperature acquisition unit includes a thermistor and an A / D sampling circuit, with each thermistor uniquely corresponding to a single smart cell. The A / D sampling circuit includes a power supply and a sampling resistor. After discharging the power supply, the voltage across the thermistor is determined by detecting the current value of the sampling resistor. Subsequently, the single-cell control unit obtains the thermistor temperature value according to a preset voltage-temperature lookup table. This thermistor temperature value represents the actual measured value of the cell body, i.e., the second cell temperature.

[0091] It should be noted that the voltage-temperature lookup table includes the correspondence between voltage and temperature values. The voltage value is matched with the collected voltage value in the voltage-temperature lookup table to determine the unique corresponding temperature value.

[0092] It should be noted that the thermistor can be a negative temperature coefficient thermistor (NTC), and no specific limitation is made here.

[0093] In step S340 of some embodiments, since the temperature measurement value is greatly affected by the environment and the temperature calculation value is greatly affected by the state of the battery cell, relying solely on the temperature measurement value or the temperature calculation value to reflect the battery cell temperature may result in a large error. Therefore, the single-cell control unit can perform a weighted calculation of the first battery cell temperature and the second battery cell temperature to obtain the initial battery cell temperature. For example, when the weight of both temperatures is set to 0.5, it is equivalent to calculating the average of the first battery cell temperature and the second battery cell temperature to obtain the initial battery cell temperature. This application does not specifically limit the temperature weights of the first battery cell temperature and the second battery cell temperature, and can flexibly adjust them according to actual needs. The embodiments of this application jointly determine the temperature of the battery cell body by using the temperature measurement value and the temperature calculation value, which can more accurately and reliably determine the temperature of the battery cell body.

[0094] In step S220 of some embodiments, the individual cell control unit sends the initial cell temperature obtained through temperature measurement and temperature calculation to the central control module. The central control module generates a first control signal by comparing the initial cell temperature with a preset temperature threshold. This first control signal indicates whether the cells in the battery pack / module need to be cooled or heated.

[0095] Please refer to Figure 4 , Figure 4 This is an optional flowchart of step S220 provided in the embodiments of this application. In some embodiments, the preset temperature threshold includes a heating threshold and a cooling threshold, and step S220 may specifically include, but is not limited to, steps S410 to S440:

[0096] In step S410, the main control module calculates the average value of the initial cell temperature to obtain the target control temperature;

[0097] In step S420, the central control module compares the target control temperature with the heating threshold to obtain the first comparison result;

[0098] Step S430: The central control module compares the target control temperature and the cooling threshold to obtain a second comparison result.

[0099] In step S440, the master control module generates a first control signal based on the first comparison result and the second comparison result.

[0100] In step S410 of some embodiments, the main control module of the battery pack / battery module receives the initial cell temperatures sent by multiple cell bodies. Since the initial cell temperatures of each cell body have certain differences, the main control module calculates the average of the initial cell temperatures to obtain the target control temperature.

[0101] In steps S420 and S430 of some embodiments, the heating threshold is used to represent the heating start-up value, and the cooling threshold is used to represent the cooling start-up value. Therefore, the entire temperature range can be divided into three intervals based on the heating and cooling thresholds: a heating interval, a normal interval, and a cooling interval. The heating threshold is the maximum temperature value in the heating interval, and the cooling threshold is the minimum temperature value in the cooling interval. When the temperature is below the heating threshold, equivalent to the target control temperature being in the heating interval, heating treatment is required for the battery pack / battery module. When the temperature is above the cooling threshold, equivalent to the target control temperature being in the cooling interval, cooling treatment is required for the battery pack / battery module. When the temperature is above or equal to the heating threshold and below or equal to the cooling threshold, equivalent to the target control temperature being in the normal interval, neither heating nor cooling treatment is required for the battery pack / battery module.

[0102] Specifically, the central control module compares the target control temperature with the heating threshold to obtain a first comparison result, which indicates whether the battery pack / battery module needs heating treatment. The central control module compares the target control temperature with the cooling threshold to obtain a second comparison result, which indicates whether the battery pack / battery module needs cooling treatment.

[0103] In step S440 of some embodiments, the master control module generates a first control signal based on the first comparison result and the second comparison result. The first control signal is used to indicate whether the cells in the battery pack / battery module need to be cooled or heated.

[0104] Please refer to Figure 5 , Figure 5 This is another optional flowchart of the cell temperature regulation method provided in the embodiments of this application. In some embodiments, before step S440, the cell temperature regulation method of the embodiments of this application may include, but is not limited to, steps S510 and S520.

[0105] Step S510: If the first comparison result indicates that the target control temperature is greater than or equal to the heating threshold, and the second comparison result indicates that the target control temperature is less than or equal to the cooling threshold, the main control module sends a liquid recovery signal to the liquid delivery module.

[0106] In step S520, the liquid delivery module recovers the temperature-regulating solution according to the liquid recovery signal.

[0107] In steps S510 and S520 of some embodiments, this application embodiment sets up a main pipe and a liquid delivery pipe in the battery pack / battery module. The main pipe connects to the individual valves of each smart cell to control whether the temperature-regulating liquid in the main pipe flows into the individual pipes set in the circumferential direction of the smart cell. Specifically, if the first comparison result indicates that the target control temperature is greater than or equal to the heating threshold, and the second comparison result indicates that the target control temperature is less than or equal to the cooling threshold, it means that the target control temperature of the battery pack / battery module is in the normal range, and therefore no heating or cooling treatment is required for the battery pack / battery module. The main control module sends a liquid recovery signal to the liquid delivery module, and the liquid delivery module recovers the temperature-regulating solution flowing in the main pipe and the individual pipes according to the liquid recovery signal.

[0108] In some embodiments, the liquid delivery module of this application may include an inlet pipe, an outlet pipe, a solution storage unit, and a solution pump. The inlet pipe is connected to the inlet of the main pipeline, and the outlet pipe is connected to the outlet of the main pipeline. The solution pump is communicatively connected to the main control module to provide circulation power for the temperature-regulating solution. When the main control module sends a liquid output signal to the liquid delivery module, the solution pump draws the temperature-regulating solution from the solution storage unit into the main pipeline through the inlet pipe and the inlet of the main pipeline. When the main control module sends a liquid recovery signal, the solution pump recovers the temperature-regulating solution from the solution storage unit back into the solution storage unit through the outlet of the main pipeline and the outlet pipe.

[0109] It should be noted that if the first comparison result indicates that the target control temperature is greater than or equal to the heating threshold, and the second comparison result indicates that the target control temperature is less than or equal to the cooling threshold, the main control module sends a valve closing signal to the individual control unit of each smart cell to close all the conducting individual valves.

[0110] In step S230 of some embodiments, in order to achieve temperature regulation of the battery cell body, the main control module performs temperature detection on the temperature regulation solution based on the initial battery cell temperature and the preset temperature threshold, that is, determines the target solution temperature that needs to flow into the battery pack / battery module.

[0111] Please refer to Figure 6 , Figure 6 This is an optional flowchart of step S230 provided in the embodiments of this application. In some embodiments, step S230 may specifically include, but is not limited to, steps S610 to S630.

[0112] In step S610, the central control module generates a second control signal based on the first comparison result and the second comparison result, and sends the second control signal to the liquid delivery module.

[0113] In step S620, the main control module detects the temperature of the temperature-regulating solution in the liquid delivery module to obtain the initial solution temperature;

[0114] In step S630, the main control module detects the temperature of the temperature-adjusting solution based on the second control signal and the initial solution temperature to obtain the target solution temperature.

[0115] In step S610 of some embodiments, if the first comparison result indicates that the target control temperature is less than the heating threshold, or the second comparison result indicates that the target control temperature is greater than the cooling threshold, that is, if the target control temperature of the battery pack / battery module is not in the normal range, then the battery pack / battery module needs to be heated or cooled. Therefore, the main control module generates a second control signal based on the first comparison result and the second comparison result, and sends the second control signal to the liquid delivery module. This second control signal is used to indicate a signal for temperature adjustment of the temperature-regulating liquid.

[0116] In steps S620 and S630 of some embodiments, the central control module first detects the temperature of the temperature-regulating solution in the liquid delivery module to obtain the initial solution temperature. Then, the central control module detects the temperature of the temperature-regulating solution according to the second control signal and the initial solution temperature to obtain the target solution temperature that needs to flow into the battery pack / battery module, and this target solution temperature can regulate the temperature of the corresponding smart cells in the battery pack / battery module.

[0117] It should be noted that, in this embodiment of the application, a temperature sensor can be installed in the liquid delivery module to detect the temperature of the temperature-regulating solution.

[0118] In some embodiments, the second control signal is a temperature-regulating heating signal or a temperature-regulating cooling signal, and step S730 can specifically perform different operations depending on the second control signal.

[0119] If the second control signal is a temperature regulation and heating signal, the liquid delivery module heats the temperature regulation solution according to the temperature regulation and heating signal, and the main control module detects the temperature of the temperature regulation solution after the heat regulation treatment to obtain the target solution temperature.

[0120] If the second control signal is a temperature regulation and cooling signal, the liquid delivery module cools the temperature regulation solution according to the temperature regulation and cooling signal, and the main control module detects the temperature of the temperature regulation solution after cooling to obtain the target solution temperature.

[0121] It should be noted that if the second control signal is a temperature-regulating heating signal, the initial solution temperature can be increased according to preset temperature increase interval data, and the target solution temperature can be obtained by real-time monitoring of the temperature-regulating solution temperature using a temperature sensor. The temperature increase interval data can be 3 degrees, 5 degrees, etc., and is not specifically limited here; it can be flexibly set according to actual needs. If the second control signal is a temperature-regulating cooling signal, the initial solution temperature can be decreased according to preset temperature decrease interval data, and the target solution temperature can be obtained by real-time monitoring of the temperature-regulating solution temperature using a temperature sensor. The absolute value of the temperature decrease interval data can be 3 degrees, 5 degrees, etc., and is not specifically limited here; it can be flexibly set according to actual needs.

[0122] In step S240 of some embodiments, the master control module sends the first control signal and the target solution temperature to the individual cell control unit to determine whether the cell body needs to be temperature-regulated based on the individual cell control unit.

[0123] In step S250 of some embodiments, the single-cell control unit determines whether the cell body is an abnormal cell based on the target solution temperature and the initial cell temperature. The abnormal cell indicates a cell that needs temperature regulation. If the cell body is an abnormal cell, a first control signal controls the conduction state of the single-cell valve to regulate the temperature of the smart cell body according to the temperature-regulating solution.

[0124] Please refer to Figure 7 , Figure 7 This is an optional flowchart of step S250 provided in the embodiments of this application. In some embodiments, step S250 may specifically include, but is not limited to, steps S710 and S720.

[0125] In step S710, the single-cell control unit compares the target solution temperature and the initial cell temperature to obtain a third comparison result.

[0126] In step S720, the individual control unit controls the conduction state of the individual valve based on the third comparison result and the first control signal.

[0127] In steps S710 and S720 of some embodiments, when the central control module generates a second control signal based on the first comparison result and the second comparison result, and sends the second control signal to the liquid delivery module, the temperature of the temperature-regulating solution is adjusted by the liquid delivery module. When the central control module detects that the liquid delivery module has adjusted the temperature of the temperature-regulating solution, the central control module sends a liquid output signal to the liquid delivery module, and the solution pump flows the temperature-regulating solution in the solution storage unit into the main pipeline through the inlet of the inlet pipe and the inlet of the main pipeline. The individual control unit compares the target solution temperature and the initial cell temperature to obtain a third comparison result, which is used to indicate whether the smart cell is an abnormal cell that needs temperature adjustment.

[0128] In some embodiments, the first control signal includes a cell heating signal and a cell cooling signal, and step S820 may specifically include any of the following steps.

[0129] If the first control signal is a cell heating signal, and the third comparison result indicates that the initial cell temperature is less than the target solution temperature, then the single cell control unit controls the single cell valve to be in the on state.

[0130] If the first control signal is a cell heating signal, and the third comparison result indicates that the initial cell temperature is greater than or equal to the target solution temperature, then the cell control unit controls the cell valve to be closed.

[0131] If the first control signal is a cell cooling signal, and the third comparison result indicates that the initial cell temperature is greater than the target solution temperature, then the single cell control unit controls the single cell valve to be in the on state.

[0132] If the first control signal is a cell cooling signal, and the third comparison result indicates that the initial cell temperature is less than or equal to the target solution temperature, then the cell control unit controls the cell valve to be closed.

[0133] It should be noted that when the individual control unit controls the individual valve to be in the conducting state, the temperature regulating solution in the main pipeline flows into the individual pipeline circumferentially arranged in the smart cell, which can expand the contact area for temperature regulation of the smart cell, thereby effectively improving the efficiency of cell temperature regulation. Furthermore, in this embodiment, by controlling the conducting state of the individual valve of each smart cell according to the third comparison result and the first control signal, the individual control unit can achieve targeted control of the flow state of the temperature regulating solution in the individual pipeline of the corresponding smart cell, thereby realizing individual temperature regulation of smart cells with abnormal temperatures, improving the efficiency of cell temperature regulation, and reducing the energy consumption during cell temperature regulation.

[0134] This application describes a battery cell temperature regulation system based on smart battery cells. It includes controlling individual valves via a single-cell control unit within the smart battery cell, and then controlling whether the individual smart cell's pipe is connected to the main pipe by opening and closing these valves. It also includes how to identify abnormal smart cells. Specifically, when temperature adjustment is required, smart cells with abnormal temperatures will be connected to the main pipe, while other normal smart cells will remain disconnected. This allows for truly individual temperature adjustment of abnormal cells, resulting in better cooling, higher efficiency, and lower energy consumption.

[0135] The specific implementation of the cell temperature regulation system in this application is basically the same as the specific implementation of the cell temperature regulation method described above, and will not be repeated here.

[0136] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described cell temperature regulation method.

[0137] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0138] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0139] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0140] The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0141] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0142] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0143] It should be understood that in this application, "at least one (item)" means one or more, and "more than one" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0144] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0145] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0146] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0147] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0148] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A cell temperature regulation system, characterized in that, The system includes: A smart battery cell includes a battery cell body, a temperature acquisition unit, and a single-cell control unit. The battery cell body is connected to the temperature acquisition unit, and the temperature acquisition unit is electrically connected to the single-cell control unit. The single-cell control unit is used to determine the initial battery cell temperature of the battery cell body based on the temperature acquired by the temperature acquisition unit. A single-unit pipe is disposed in the circumferential direction of the smart battery cell, and the single-unit pipe is used to flow a temperature-regulating solution. A central control module, electrically connected to multiple individual control units, is configured to receive the initial cell temperatures corresponding to multiple smart cells, calculate the average of the initial cell temperatures to obtain a target control temperature, generate a first control signal based on a comparison between the target control temperature and a preset temperature threshold, the first control signal indicating whether to perform heating, cooling, or no treatment on the multiple smart cells; the central control module is also configured to detect the temperature of the temperature-regulating solution based on the comparison between the target control temperature and the preset temperature threshold, adjust the temperature of the temperature-regulating solution based on the temperature detection result, and obtain a target solution temperature; the central control module further configures to send the first control signal and the target solution temperature to the individual control unit corresponding to each smart cell. A single-unit valve is connected to the single-unit pipeline; wherein, the single-unit control unit compares the target solution temperature and the initial cell temperature to obtain a third comparison result, and controls the conduction state of the single-unit valve corresponding to each smart cell according to the third comparison result and the first control signal, so as to control the flow state of the temperature-regulating solution in the single-unit pipeline corresponding to each smart cell.

2. The system according to claim 1, characterized in that, The system also includes: A main pipeline, which is connected to the individual valve, is used to allow the temperature-regulating solution to flow into the individual pipeline through the individual valve; A liquid delivery module is connected to the main pipeline and electrically connected to the main control module. The liquid delivery module is used to flow the temperature-regulating solution into the main pipeline and to recover the temperature-regulating solution flowing into the main pipeline and the individual pipeline.

3. A cell temperature regulation method, applied to the cell temperature regulation system as described in claim 1 or 2, characterized in that, The method includes: The individual control unit determines the initial cell temperature of the battery cell body based on the temperature collected by the temperature acquisition unit, and sends the initial cell temperature corresponding to multiple smart cells to the central control module; The overall control module calculates the average temperature of the multiple initial cells to obtain the target control temperature. The overall control module generates a first control signal based on the comparison result between the target control temperature and the preset temperature threshold. The first control signal is used to indicate whether to perform heating treatment, cooling treatment or no treatment on the multiple smart cells. The overall control module detects the temperature of the temperature-regulating solution based on the comparison between the target control temperature and the preset temperature threshold, and adjusts the temperature of the temperature-regulating solution according to the temperature detection result to obtain the target solution temperature. The central control module sends the first control signal and the target solution temperature to the individual control unit corresponding to each smart cell. The individual control unit compares the target solution temperature and the initial cell temperature to obtain a third comparison result. Based on the third comparison result and the first control signal, the individual control unit controls the conduction state of the individual valve corresponding to each smart cell to adjust the temperature of the cell body corresponding to each smart cell.

4. The method according to claim 3, characterized in that, The single-cell control unit determines the initial cell temperature of the cell body based on the temperature collected by the temperature acquisition unit, including: The single-cell control unit acquires the internal resistance data of the battery cell body; The single-cell control unit obtains the first cell temperature based on the cell internal resistance data. The temperature acquisition unit acquires the temperature of the battery cell body to obtain the second battery cell temperature; The single-cell control unit determines the initial cell temperature based on the first cell temperature and the second cell temperature.

5. The method according to claim 3, characterized in that, The preset temperature threshold includes a heating threshold and a cooling threshold. The central control module generates a first control signal based on the comparison between the target control temperature and the preset temperature threshold, including: The central control module compares the target control temperature with the heating threshold to obtain a first comparison result. The master control module compares the target control temperature and the cooling threshold to obtain a second comparison result. The master control module generates the first control signal based on the first comparison result and the second comparison result.

6. The method according to claim 5, characterized in that, The overall control module performs temperature detection on the temperature-regulating solution based on the comparison result between the target control temperature and the preset temperature threshold, and adjusts the temperature of the temperature-regulating solution according to the temperature detection result to obtain the target solution temperature, including: The central control module generates a second control signal based on the first comparison result and the second comparison result, and sends the second control signal to the liquid delivery module; The main control module detects the temperature of the temperature-regulating solution in the liquid delivery module to obtain the initial solution temperature. The master control module adjusts the temperature of the temperature-regulating solution according to the second control signal and the initial solution temperature to obtain the target solution temperature.

7. The method according to claim 6, characterized in that, The main control module adjusts the temperature of the temperature-regulating solution according to the second control signal and the initial solution temperature to obtain the target solution temperature, including: If the second control signal is a temperature regulation and heating signal, the liquid delivery module heats the temperature regulation solution according to the temperature regulation and heating signal, and the main control module detects the temperature of the temperature regulation solution after the heat regulation treatment to obtain the target solution temperature. If the second control signal is a temperature regulation and cooling signal, the liquid delivery module performs cooling treatment on the temperature regulation solution according to the temperature regulation and cooling signal, and the main control module detects the temperature of the temperature regulation solution after cooling treatment to obtain the target solution temperature.

8. The method according to claim 3, characterized in that, The first control signal includes a cell heating signal and a cell cooling signal. The individual control unit controls the conduction state of the valve corresponding to each smart cell based on the third comparison result and the first control signal, including: If the first control signal is the cell heating signal, and the third comparison result indicates that the initial cell temperature is less than the target solution temperature, then the single-cell control unit controls the single-cell valve to be in the on state; If the first control signal is the cell heating signal, and the third comparison result indicates that the initial cell temperature is greater than or equal to the target solution temperature, then the single-cell control unit controls the single-cell valve to be closed. If the first control signal is the cell cooling signal, and the third comparison result indicates that the initial cell temperature is greater than the target solution temperature, then the single-cell control unit controls the single-cell valve to be in the on state; If the first control signal is the cell cooling signal, and the third comparison result indicates that the initial cell temperature is less than or equal to the target solution temperature, then the single-cell control unit controls the single-cell valve to be closed.

9. The method according to claim 5, characterized in that, Before the master control module generates the first control signal based on the first comparison result and the second comparison result, the method further includes: If the first comparison result indicates that the target control temperature is greater than or equal to the heating threshold, and the second comparison result indicates that the target control temperature is less than or equal to the cooling threshold, the main control module sends a liquid recovery signal to the liquid delivery module. The liquid delivery module recovers the temperature-regulating solution according to the liquid recovery signal.

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