CN-116154364-B - Battery cell temperature adjusting system and battery cell temperature adjusting method

Abstract

The application provides a battery cell temperature adjusting system and a battery cell temperature adjusting method, and belongs to the technical field of battery cells. The battery cell temperature adjusting system comprises an intelligent battery cell, specifically comprises a battery cell body, a temperature acquisition unit and a single control unit, wherein the single control unit is used for determining initial battery cell temperature according to the temperature acquired by the temperature acquisition unit, a single pipeline is arranged on the circumference of the intelligent battery cell to circulate temperature adjusting solution, a master control module is electrically connected with the single control unit and receives the initial battery cell temperature sent by the single control unit to generate a first control signal according to the initial battery cell temperature and a preset temperature threshold value, the master control module detects the temperature of the temperature adjusting solution and sends the first control signal and detected target solution temperature to the single control unit, the single valve is connected with the single pipeline, and the single control unit controls the conduction state of the single valve to control the circulation state of the temperature adjusting solution. The embodiment of the application can improve the temperature regulation efficiency of the battery cell.

Inventors

• MI NA
• HUANG DENGGAO
• LEI JINGJING

Assignees

• 欣旺达电动汽车电池有限公司

Dates

Publication Date

20260508

Application Date

20221230

Claims (9)

1. 1. A cell temperature regulation system, the system comprising: The intelligent battery cell comprises a battery cell body, a temperature acquisition unit and a single control unit, wherein the battery cell body is connected with the temperature acquisition unit, the temperature acquisition unit is electrically connected with the single control unit, and the single control unit is used for determining the initial battery cell temperature of the battery cell body according to the temperature acquired by the temperature acquisition unit; the single pipeline is arranged on the circumference of the intelligent battery cell and is used for circulating a temperature-adjusting solution; The system comprises a plurality of intelligent battery cells, a master control module, a temperature control module and a single control unit, wherein the master control module is electrically connected with the plurality of single control units and is used for receiving initial battery cell temperatures corresponding to the plurality of intelligent battery cells, carrying out average value calculation on the plurality of initial battery cell temperatures to obtain target control temperatures, generating a first control signal according to comparison results of the target control temperatures and preset temperature thresholds, wherein the first control signal is used for representing heating treatment, refrigeration treatment or non-treatment on the plurality of intelligent battery cells, carrying out temperature detection on the temperature-regulating solution according to comparison results of the target control temperatures and the preset temperature thresholds, and regulating the temperature of the temperature-regulating solution according to the temperature detection results to obtain target solution temperatures; The single control unit is used for comparing the temperature of the target solution with the temperature of the initial battery cell to obtain a third comparison result, and controlling the conduction state of the single valve corresponding to each intelligent battery cell according to the third comparison result and the first control signal so as to control the circulation state of the temperature regulating solution in the single pipeline corresponding to each intelligent battery cell.
2. 2. The system of claim 1, wherein the system further comprises: The main pipeline is connected with the single valve and is used for flowing the temperature-adjusting solution into the single pipeline through the single valve; The liquid conveying module is connected with the main pipeline, the liquid conveying module is electrically connected with the master control module, the liquid conveying module is used for enabling the temperature adjusting solution to flow into the main pipeline, and the liquid conveying module is also used for recycling the temperature adjusting solution flowing into the main pipeline and the monomer pipeline.
3. 3. A method for regulating the temperature of a battery cell, which is applied to the battery cell temperature regulating system as claimed in claim 1 or 2, and is characterized in that the method comprises the following steps: the single control unit determines the initial cell temperature of the cell body according to the temperature acquired by the temperature acquisition unit, and sends the initial cell temperatures corresponding to the intelligent cells to the master control module; The master control module performs average value calculation on the initial battery cell temperatures to obtain target control temperature, and generates a first control signal according to a comparison result of the target control temperature and a preset temperature threshold value, wherein the first control signal is used for representing heating treatment, refrigeration treatment or non-treatment on the intelligent battery cells; The master control module detects the temperature of the temperature-regulating solution according to the comparison result of the target control temperature and the preset temperature threshold value, and adjusts the temperature of the temperature-regulating solution according to the temperature detection result to obtain the target solution temperature; The master control module sends the first control signal and the target solution temperature to the monomer control unit corresponding to each intelligent cell; the monomer control unit compares the temperature of the target solution with the temperature of the initial battery cell to obtain a third comparison result, and controls the conduction state of the monomer valve corresponding to each intelligent battery cell according to the third comparison result and the first control signal so as to regulate the temperature of the battery cell body corresponding to each intelligent battery cell.
4. 4. The method of claim 3, wherein the determining the initial cell temperature of the cell body by the cell control unit based on the temperature acquired by the temperature acquisition unit comprises: The single control unit acquires the internal resistance data of the battery cell body; the single control unit obtains a first battery cell temperature according to the battery cell internal resistance data; the temperature acquisition unit acquires the temperature of the battery cell body to obtain a second battery cell temperature; The monomer control unit determines the initial cell temperature according to the first cell temperature and the second cell temperature.
5. 5. A method according to claim 3, wherein the preset temperature threshold includes a heating threshold and a cooling threshold, and the master control module generates the first control signal according to a comparison result between the target control temperature and the preset temperature threshold, including: the master control module compares the temperature according to the target control temperature and the heating threshold value to obtain a first comparison result; The master control module performs temperature comparison according to the target control temperature and the refrigeration threshold value to obtain a second comparison result; And the master control module generates the first control signal according to the first comparison result and the second comparison result.
6. 6. The method of claim 5, wherein the master control module detects the temperature of the temperature-adjusting solution according to a comparison result of the target control temperature and a preset temperature threshold, adjusts the temperature of the temperature-adjusting solution according to the temperature detection result, and obtains the target solution temperature, and comprises: the master control module generates a second control signal according to the first comparison result and the second comparison result and sends the second control signal to the liquid conveying module; the master control module detects the temperature of the temperature-regulating solution in the liquid conveying module to obtain the initial solution temperature; and the master control module adjusts the temperature of the temperature-adjusting solution according to the second control signal and the initial solution temperature to obtain the target solution temperature.
7. 7. The method of claim 6, wherein the master control module adjusts the temperature of the tempering solution based on the second control signal and the initial solution temperature to obtain the target solution temperature, comprising: if the second control signal is a temperature-adjusting heating signal, the liquid conveying module carries out heating treatment on the temperature-adjusting solution according to the temperature-adjusting heating signal, and the master control module carries out temperature detection on the temperature-adjusting solution after the heating treatment to obtain the target solution temperature; And if the second control signal is a temperature-regulating refrigeration signal, the liquid conveying module carries out refrigeration treatment on the temperature-regulating solution according to the temperature-regulating refrigeration signal, and the master control module carries out temperature detection on the temperature-regulating solution after refrigeration treatment to obtain the target solution temperature.
8. 8. The method of claim 3, wherein the first control signal includes a cell heating signal and a cell cooling signal, and the single control unit controls the conduction state of the single valve corresponding to each intelligent cell according to the third comparison result and the first control signal, including: If the first control signal is the electric core heating signal and the third comparison result shows that the initial electric core temperature is smaller than the target solution temperature, the monomer control unit controls the conduction state of the monomer valve to be conduction; if the first control signal is the electric core heating signal and the third comparison result indicates that the initial electric core temperature is greater than or equal to the target solution temperature, the monomer control unit controls the conduction state of the monomer valve to be closed; if the first control signal is the battery core refrigerating signal and the third comparison result indicates that the initial battery core temperature is higher than the target solution temperature, the monomer control unit controls the conduction state of the monomer valve to be conducted; And if the first control signal is the battery cell refrigerating signal and the third comparison result shows that the initial battery cell temperature is less than or equal to the target solution temperature, the monomer control unit controls the conduction state of the monomer valve to be closed.
9. 9. The method of claim 5, wherein prior to the master control module generating the first control signal based on the first comparison result and the second comparison result, the method further comprises: If the first comparison result indicates that the target control temperature is greater than or equal to the heating threshold value, and the second comparison result indicates that the target control temperature is less than or equal to the refrigerating threshold value, the master control module sends a liquid recovery signal to the liquid conveying module; The liquid delivery module recovers the tempering solution according to the liquid recovery signal.

Description

Battery cell temperature adjusting system and battery cell temperature adjusting method Technical Field The application relates to the technical field of battery cells, in particular to a battery cell temperature adjusting system and a battery cell temperature adjusting method. Background At present, when a battery module formed by a plurality of battery cells is subjected to temperature regulation in the prior art, when the battery module is abnormal, a method for carrying out temperature regulation on the battery cells in the whole battery module is generally adopted, and the temperature regulation efficiency of the battery cells by the method is lower. Therefore, how to improve the temperature adjustment efficiency of the battery cells in the battery module becomes a technical problem to be solved. Disclosure of Invention The embodiment of the application mainly aims to provide a battery cell temperature adjusting system and a battery cell temperature adjusting method, aiming at improving the temperature adjusting efficiency of a battery cell. To achieve the above object, a first aspect of an embodiment of the present application provides a battery cell temperature adjustment system, the system including: The intelligent battery cell comprises a battery cell body, a temperature acquisition unit and a single control unit, wherein the battery cell body is connected with the temperature acquisition unit, the temperature acquisition unit is electrically connected with the single control unit, and the single control unit is used for determining the initial battery cell temperature of the battery cell body according to the temperature acquired by the temperature acquisition unit; the single pipeline is arranged on the circumference of the intelligent battery cell and is used for circulating a temperature-adjusting solution; The total control module is electrically connected with the single control unit and is used for receiving the initial cell temperature, generating a first control signal according to the initial cell temperature and a preset temperature threshold value, detecting the temperature of the temperature regulating solution, and regulating the temperature of the temperature regulating solution according to a temperature detection result to obtain a target solution temperature; the single control unit is used for controlling the conduction state of the single valve according to the first control signal and the target solution temperature so as to control the circulation state of the temperature-adjusting solution in the single pipeline. In some embodiments, the system further comprises: The main pipeline is connected with the single valve and is used for flowing the temperature-adjusting solution into the single pipeline through the single valve; The liquid conveying module is connected with the main pipeline, the liquid conveying module is electrically connected with the master control module, the liquid conveying module is used for enabling the temperature adjusting solution to flow into the main pipeline, and the liquid conveying module is also used for recycling the temperature adjusting solution flowing into the main pipeline and the monomer pipeline. To achieve the above object, a second aspect of the embodiments of the present application provides a method for adjusting a temperature of a battery cell, which is applied to the battery cell temperature adjusting system according to the first aspect, and the method includes: the monomer control unit determines the initial cell temperature of the cell body according to the temperature acquired by the temperature acquisition unit and sends the initial cell temperature to the master control module; the master control module generates a first control signal according to the initial cell temperature and a preset temperature threshold; The master 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; The master control module sends the first control signal and the target solution temperature to the monomer control unit; And the monomer control unit controls the conduction state of the monomer valve according to the target solution temperature and the first control signal to regulate the temperature of the battery cell body. In some embodiments, the monomer control unit determines the initial cell temperature of the cell body according to the temperature acquired by the temperature acquisition unit, and includes: The single control unit acquires the internal resistance data of the battery cell body; the single control unit obtains a first battery cell temperature according to the battery cell internal resistance data; the temperature acquisition unit acquires the temperature of the battery cell body to obtain a second battery cell temperature; The monomer control unit determ