Battery pack thermal control system

Abstract

The utility model provides a battery pack thermal control system, and belongs to the field of battery pack thermal control. The battery pack thermal control system comprises a first temperature detection module, a first control module, a second control module, a first liquid cooling module, a second liquid cooling module and an electromagnetic valve, the first temperature detection module is used for being connected with a battery pack; the first control module is respectively connected with the first temperature detection module, the second control module, the first liquid cooling module and the electromagnetic valve; the electromagnetic valve is connected with the second liquid cooling module and is arranged at a water inlet of the second liquid cooling module; the first liquid cooling module is arranged at the bottom in the battery pack, and the second liquid cooling module is arranged at the top in the battery pack; the first temperature detection module is configured to detect the overall temperature of the battery pack; the first control module is configured to control the opening degree of the electromagnetic valve; the electromagnetic valve is configured to connect or disconnect the second liquid cooling module. The problem of insufficient reliability can be solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery pack thermal control, and in particular to a battery pack thermal control system. Background Art

[0002] With the continuous development of new energy technologies, battery packs have been widely used in electric vehicles, energy storage devices, and other fields. However, battery packs generate a large amount of heat during operation. If heat is not dissipated promptly and effectively, it can affect battery performance, lifespan, and even safety. Therefore, existing battery pack thermal control systems suffer from insufficient reliability. Utility Model Content

[0003] Embodiments of the present disclosure provide a battery pack thermal control system to solve the problem of insufficient reliability.

[0004] The present disclosure provides a battery pack thermal control system, including:

[0005] A first temperature detection module, a first control module, a second control module, a first liquid cooling module, a second liquid cooling module and a solenoid valve;

[0006] The first temperature detection module is used to connect with the battery pack;

[0007] The first control module is respectively connected to the first temperature detection module, the second control module, the first liquid cooling module and the solenoid valve;

[0008] The solenoid valve is connected to the second liquid cooling module, and the solenoid valve is arranged at the water inlet of the second liquid cooling module;

[0009] The first liquid cooling module is arranged at the bottom of the battery pack, and the second liquid cooling module is arranged at the top of the battery pack;

[0010] The first temperature detection module is configured to detect the overall temperature of the battery pack;

[0011] The first control module is configured to control the opening of the solenoid valve;

[0012] The solenoid valve is configured to turn on or off the second liquid cooling module.

[0013] In an exemplary embodiment of the present disclosure, a battery pack thermal control system further includes a plurality of second temperature detection modules;

[0014] The battery pack includes a plurality of battery cells;

[0015] The plurality of second temperature detection modules are connected to the plurality of battery cells in a one-to-one correspondence.

[0016] In an exemplary embodiment of the present disclosure, the first control module includes a comparison unit and a control unit;

[0017] The comparison unit is respectively connected to the first temperature detection module, the plurality of second temperature detection modules and the control unit;

[0018] The control unit is connected to the first liquid cooling module and the solenoid valve respectively.

[0019] In an exemplary embodiment of the present disclosure, the first temperature detection module and the second temperature detection module have the same circuit structure;

[0020] The first temperature detection module includes: a thermistor RT1, a resistor R1 and an amplifier U1;

[0021] The first end of the thermistor RT1 is connected to the VCC power supply and the first temperature detection module respectively, the second end is connected to the first end of the resistor R1, and the second end of the resistor R1 is grounded;

[0022] The second terminal of thermistor RT1 is connected to the non-inverting input terminal of amplifier U1;

[0023] The inverting input terminal of the amplifier U1 is connected to the reference voltage Vref1;

[0024] The output terminal of the amplifier U1 is connected to the comparison unit.

[0025] In an exemplary embodiment of the present disclosure, a battery pack thermal control system further includes a flow detection module;

[0026] The flow unit is connected to the first liquid cooling module and the second control module respectively.

[0027] In an exemplary embodiment of the present disclosure, a battery pack thermal control system further includes a pressure detection module;

[0028] The pressure detection module is connected to the second liquid cooling module and the second control module respectively.

[0029] In an exemplary embodiment of the present disclosure, a battery pack thermal control system further includes a fault detection module and an alarm module;

[0030] The fault detection module and the alarm module are both connected to the first control module.

[0031] In an exemplary embodiment of the present disclosure, a battery pack thermal control system further includes a communication module;

[0032] The first control module communicates with the terminal through the communication module.

[0033] The battery pack thermal control system provided by the embodiments of the present disclosure has the following beneficial effects:

[0034] The embodiment of the present disclosure can effectively control the temperature of the battery pack through the coordinated work of various modules, ensuring that the battery pack operates within a safe and efficient temperature range. First, the embodiment of the present disclosure detects the overall temperature of the battery pack in real time through the first temperature detection module, ensuring a rapid response to changes in the temperature of the battery pack, and effectively preventing the adverse effects of overheating or overcooling on the performance and life of the battery pack. Secondly, the first liquid cooling module and the second liquid cooling module are respectively deployed at the bottom and top of the battery pack, further improving the efficiency and uniformity of thermal management. The embodiment of the present disclosure introduces a solenoid valve, which flexibly adjusts the cooling flow of the second liquid cooling module under the intelligent control of the first control module, thereby achieving a dynamic balance of the internal temperature of the battery pack, ensuring the safe operation of the battery pack, and optimizing energy utilization efficiency. Therefore, the embodiment of the present disclosure can solve the problem of insufficient reliability of the battery pack thermal control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0036] Figure 1 is a schematic structural diagram of a battery pack thermal control system provided by an embodiment of the present disclosure;

[0037] Figure 2 is a schematic structural diagram of another battery pack thermal control system provided by an embodiment of the present disclosure;

[0038] Figure 3 3 is a structural diagram of the first temperature detection module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] To help those skilled in the art better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of this solution, not all of it. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this solution.

[0040] Throughout the specification, claims, and accompanying figures of this solution, the term "including" and any variations thereof mean "including, but not limited to," and are intended to cover non-exclusive inclusions and are not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish between different objects, not to describe a specific order.

[0041] The following describes the implementation of the present disclosure in detail with reference to the accompanying drawings:

[0042] Figure 1 This is a schematic diagram of the structure of a thermal control system of a battery pack 10 provided in an embodiment of the present disclosure. Figure 1 , the battery pack 10 thermal control system includes:

[0043] A first temperature detection module 101, a first control module 102, a second control module 103, a first liquid cooling module 104, a second liquid cooling module 105 and a solenoid valve 106;

[0044] The first temperature detection module 101 is used to connect with the battery pack 10;

[0045] The first control module 102 is respectively connected to the first temperature detection module 101, the second control module 103, the first liquid cooling module 104 and the solenoid valve 106;

[0046] The solenoid valve 106 is connected to the second liquid cooling module 105 and is disposed at the water inlet of the second liquid cooling module 105;

[0047] The first liquid cooling module 104 is disposed at the bottom of the battery pack 10 , and the second liquid cooling module 105 is disposed at the top of the battery pack 10 ;

[0048] The first temperature detection module 101 is configured to detect the overall temperature of the battery pack 10;

[0049] The first control module 102 is configured to control the opening of the solenoid valve 106 ;

[0050] The solenoid valve 106 is configured to turn on or off the second liquid cooling module 105 .

[0051] In this embodiment, the first temperature detection module 101 is connected to the battery pack 10 and is responsible for detecting the overall temperature of the battery pack 10. By continuously monitoring the temperature changes of the battery pack 10, the first temperature detection module 101 provides critical temperature data for the thermal control system. It also reflects the thermal status of the battery pack 10 under different operating conditions, providing a basis for subsequent control decisions so that the system can make corresponding adjustments in a timely manner.

[0052] The first control module 102 is connected to the first temperature detection module 101 , the second control module 103 , the first liquid cooling module 104 and the solenoid valve 106 respectively, and plays a role in coordinating and controlling each module.

[0053] The opening of the solenoid valve 106 is controlled based on the battery pack 10 temperature information sent by the first temperature detection module 101. By adjusting the opening of the solenoid valve 106, the flow of coolant entering the second liquid cooling module 105 can be controlled, thereby achieving fine adjustment of the battery pack 10 temperature.

[0054] The second control module 103 works in conjunction with the first control module 102 and is responsible for receiving other signals or executing corresponding control strategies to further optimize the performance of the thermal control system.

[0055] The first liquid cooling module 104 is located at the bottom of the battery pack 10 and is primarily responsible for providing initial cooling to the battery pack 10. It maintains close contact with the bottom of the battery pack 10, effectively transferring heat and maintaining the battery pack 10 within a suitable temperature range. The water inlet of the first liquid cooling module 104 is always open. The first liquid cooling module 104 absorbs heat generated by the battery pack 10 by circulating coolant.

[0056] The second liquid cooling module 105 is located at the top of the battery pack 10, forming a top-to-bottom cooling layout with the first liquid cooling module 104. This top location allows the second liquid cooling module 105 to better address the heat distribution at the top of the battery pack 10, further improving thermal control.

[0057] A solenoid valve 106 is provided at the water inlet of the second liquid cooling module 105 , and the inflow of the cooling liquid is controlled by turning on or off the solenoid valve 106 , thereby adjusting the working state of the second liquid cooling module 105 .

[0058] Solenoid valve 106 opens or closes the second liquid cooling module 105 based on instructions from the first control module 102. When solenoid valve 106 is open, coolant can flow into the second liquid cooling module 105, contributing to thermal control of the battery pack 10. Simultaneously, the first control module 102 can adjust the opening of solenoid valve 106 based on temperature information. When solenoid valve 106 is closed, coolant is prevented from entering the second liquid cooling module 105, thereby adjusting the cooling capacity of the thermal control system.

[0059] The battery pack 10 thermal control system uses the first temperature detection module 101 to monitor the overall temperature of the battery pack 10 in real time and transmits this temperature information to the first control module 102. Based on this temperature information, the first control module 102 determines the thermal state of the battery pack 10 and adjusts the flow of coolant entering the second liquid cooling module 105 by controlling the opening of the solenoid valve 106.

[0060] For example, when the temperature of the battery pack 10 rises, the first control module 102 can increase the opening of the solenoid valve 106, allowing more coolant to flow into the second liquid cooling module 105 and enhancing the cooling effect. Simultaneously, the first liquid cooling module 104 also works in conjunction, lowering the temperature of the battery pack 10 through the cooling effect of the bottom. Conversely, when the temperature of the battery pack 10 is too low, the first control module 102 can reduce the opening of the solenoid valve 106 or even close it, reducing or stopping the cooling effect of the second liquid cooling module 105.

[0061] From the above, it can be concluded that this embodiment can effectively control the temperature of the battery pack 10 through the coordinated work of various modules, ensuring that the battery pack 10 operates within a safe and efficient temperature range. First, this embodiment detects the overall temperature of the battery pack 10 in real time through the first temperature detection module 101, ensuring a rapid response to temperature changes of the battery pack 10, and effectively preventing the adverse effects of overheating or overcooling on the performance and life of the battery pack 10. Secondly, the first liquid cooling module 104 and the second liquid cooling module 105 are respectively deployed at the bottom and top of the battery pack 10, further improving the efficiency and uniformity of thermal management. This embodiment introduces the solenoid valve 106, which flexibly adjusts the cooling flow of the second liquid cooling module 105 under the intelligent control of the first control module 102, thereby achieving a dynamic balance of the internal temperature of the battery pack 10, ensuring the safe operation of the battery pack 10, and optimizing energy utilization efficiency. Therefore, this embodiment can solve the problem of insufficient reliability.

[0062] In one embodiment of the present disclosure, reference Figure 2 , a thermal control system of a battery pack 10 further includes a plurality of second temperature detection modules 107;

[0063] The battery pack 10 includes a plurality of battery cells 11;

[0064] The plurality of second temperature detection modules 107 are connected to the plurality of battery cells 11 in a one-to-one correspondence.

[0065] In this embodiment, the configuration of multiple second temperature detection modules 107 provides the battery pack 10 thermal control system with more refined temperature detection capabilities. Because the battery pack 10 is composed of multiple battery cells 11, different battery cells 11 may experience different temperature changes during operation due to factors such as position and load. By connecting the second temperature detection modules 107 one-to-one with each of the multiple battery cells 11, the temperature of each battery cell 11 can be accurately detected in real time.

[0066] The detailed temperature information provided by the multiple second temperature detection modules 107 can serve as a basis for optimizing the thermal control system. For example, the operating parameters of the first and second liquid cooling modules 104, 105, and the opening control strategy of the solenoid valve 106 can be adjusted based on the temperature variation trends of different battery cells 11 to achieve more efficient thermal management. Furthermore, this embodiment can also combine this temperature information to more accurately assess the operating status of the battery pack 10.

[0067] As can be seen from the above, this embodiment can more comprehensively understand the temperature distribution within the battery pack 10, thereby enabling more precise thermal control based on the specific temperature conditions of different battery cells 11. By monitoring the temperature of each battery cell 11, this embodiment can promptly detect potential overheating or overcooling issues, preventing the performance and safety of the entire battery pack 10 from being affected by temperature anomalies in individual battery cells 11. If a battery cell 11 experiences a temperature anomaly, this embodiment can quickly take appropriate measures to adjust the temperature, reducing the risk of failure and improving system reliability.

[0068] In one embodiment of the present disclosure, reference Figure 2 , the first control module 102 includes a comparison unit 201 and a control unit 202;

[0069] The comparison unit 201 is respectively connected to the first temperature detection module 101, the plurality of second temperature detection modules 107 and the control unit 202;

[0070] The control unit 202 is connected to the first liquid cooling module 104 and the solenoid valve 106 respectively.

[0071] In this embodiment, the comparison unit 201 is responsible for data processing and analysis. The comparison unit 201 receives the overall temperature information of the battery pack 10 from the first temperature detection module 101 and the temperature information of each battery cell 11 corresponding to the plurality of second temperature detection modules 107. This embodiment performs a comparative analysis of the overall temperature of the battery pack 10 and the temperature of each battery cell 11.

[0072] Comparison unit 201 can compare received temperature data with a preset temperature threshold. This threshold is typically set based on the optimal operating temperature range of the battery pack 10 and safety requirements. By comparing the actual temperature with the threshold, it can be determined whether the battery pack 10 is within the normal temperature range or whether emergency thermal control measures are necessary. Comparison unit 201 transmits the analysis results to control unit 202, providing important data support for control unit 202 to formulate thermal control strategies.

[0073] Based on the analysis results of the comparison unit 201, the control unit 202 adjusts the coolant flow rate and flow rate of the first liquid cooling module 104. For example, if the comparison unit 201 detects that the overall temperature of the battery pack 10 is high, the control unit 202 can increase the coolant flow rate of the first liquid cooling module 104 to enhance the cooling effect. For the second liquid cooling module 105 located at the top of the battery pack 10, the control unit 202 can similarly adjust the cooling of the top area by adjusting the coolant flow rate and controlling the opening of the solenoid valve 106.

[0074] The control unit 202 coordinates the operations of the first liquid cooling module 104 and the second liquid cooling module 105 to achieve optimal thermal control. The control unit 202 is also responsible for controlling the opening of the solenoid valve 106. In this embodiment, by comparing the temperature information provided by the comparison unit 201 and the decision-making basis, the control unit 202 can precisely adjust the opening of the solenoid valve 106, thereby controlling the flow of coolant entering the second liquid cooling module 105.

[0075] For example, when the temperature information of the first temperature detection module 101 and the plurality of second temperature detection modules 107 are both less than 15°C, the control unit 202 controls the first liquid cooling module 104 and the second liquid cooling module 105 to be in the cut-off state; when the temperature information of the first temperature detection module 101 or one of the plurality of second temperature detection modules 107 is greater than or equal to 15°C and less than 40°C, at this time, the control unit 202 controls the first liquid cooling module 104 to be in the normally open state; when the temperature information of the first temperature detection module 101 or one of the plurality of second temperature detection modules 107 is greater than or equal to 15°C and less than 40°C, the control unit 202 controls the first liquid cooling module 104 to be in the normally open state; When the temperature information is greater than or equal to 40°C and less than 60°C, the control unit 202 controls the first liquid cooling module 104 to be in a normally open state, controls the solenoid valve 106 to open 45°, so that the second liquid cooling module 105 starts to be in a semi-conducting state; when the temperature information of the first temperature detection module 101 or one of the multiple second temperature detection modules 107 is greater than or equal to 60°C, the control unit 202 controls the first liquid cooling module 104 to be in a normally open state, controls the solenoid valve 106 to open 90°, so that the second liquid cooling module 105 starts to be in a fully-conducting state.

[0076] As can be seen from the above, the comparison unit 201 and control unit 202 in the first control module 102 cooperate to achieve precise control and efficient management of the thermal control system of the battery pack 10. By comparing and analyzing temperature data and precisely controlling each liquid cooling module and solenoid valve 106, the temperature of the battery pack 10 can be effectively maintained stable, improving the performance and safety of the battery pack 10, and providing an efficient and reliable solution for thermal control of the battery pack 10.

[0077] In one embodiment of the present disclosure, reference Figure 3, the circuit structure of the first temperature detection module 101 and the second temperature detection module 107 is the same;

[0078] The first temperature detection module 101 includes: a thermistor RT1, a resistor R1 and an amplifier U1;

[0079] The first end of the thermistor RT1 is connected to the VCC power supply and the first temperature detection module 101 respectively, the second end is connected to the first end of the resistor R1, and the second end of the resistor R1 is grounded;

[0080] The second terminal of thermistor RT1 is connected to the non-inverting input terminal of amplifier U1;

[0081] The inverting input terminal of the amplifier U1 is connected to the reference voltage Vref1;

[0082] The output terminal of the amplifier U1 is connected to the comparison unit 201 .

[0083] In this embodiment, the first temperature detection module 101 and the second temperature detection module 107 have the same circuit structure, indicating that the principles and methods of temperature detection are consistent. The first temperature detection module 101 is primarily composed of a thermistor RT1, a resistor R1, and an amplifier U1. The thermistor RT1 is a temperature-sensitive element whose resistance value changes with temperature. Resistor R1 and thermistor RT1 form a voltage divider circuit that converts temperature changes into voltage changes. Amplifier U1 is used to amplify the voltage change signal.

[0084] Thermistor RT1 is a temperature sensor. When the temperature rises, the resistance value of thermistor RT1 will change accordingly, usually decreasing. Conversely, when the temperature drops, the resistance value will increase.

[0085] The first terminal of thermistor RT1 is connected to the VCC power supply and the first temperature detection module 101. The VCC power supply provides a stable operating voltage for the entire circuit. By connecting to thermistor RT1, the first temperature detection module 101 can obtain the voltage signal across its terminals, thereby indirectly measuring temperature changes.

[0086] Resistor R1 and thermistor RT1 together form a voltage divider circuit. Resistor R1's value is typically fixed. When thermistor RT1's resistance changes, the voltage at their connection point (i.e., the second terminal of thermistor RT1) also changes accordingly, according to the voltage divider principle. The second terminal of resistor R1 is grounded, providing a stable reference potential for the circuit.

[0087] Amplifier U1's non-inverting input is connected to the second terminal of thermistor RT1, receiving the divided voltage signal. This voltage signal is typically weak and requires amplification by the amplifier. Its inverting input is connected to reference voltage Vref1, which provides the amplifier with a fixed reference potential for comparison and amplification of the input signal. Adjusting the reference voltage setting determines the amplifier's gain and operating point.

[0088] The output of amplifier U1 is connected to comparison unit 201, transmitting the amplified temperature signal to comparison unit 201 for further processing and analysis. The amplifier's function is to increase the strength and accuracy of the temperature signal so that comparison unit 201 can more accurately determine temperature changes.

[0089] From the above, it can be concluded that the circuit structure of the first temperature detection module 101 and the second temperature detection module 107 converts temperature changes into measurable electrical signals through the coordinated work of various components, and amplifies and transmits them, providing accurate temperature detection function for the thermal control system of the battery pack 10.

[0090] In one embodiment of the present disclosure, reference Figure 2 , a thermal control system of a battery pack 10 further includes a flow detection module 108;

[0091] The flow detection module 108 is connected to the first liquid cooling module 104 and the second control module 103 respectively.

[0092] In this embodiment, the flow detection module 108 is responsible for real-time monitoring of the coolant flow rate in the first liquid cooling module 104 and transmitting this information to the second control module 103 to assist in system fault diagnosis. Abnormal coolant flow rates indicate a blockage, leak, or pump failure in the first liquid cooling module 104. By promptly detecting these abnormalities, the system can issue an alarm and initiate appropriate repair measures, preventing overheating or damage to the battery pack 10 due to the fault.

[0093] As can be seen above, flow detection module 108 provides feedback to the system by monitoring coolant flow in real time. This embodiment optimizes cooling performance, enables fault diagnosis, and thus improves system reliability. Flow detection module 108 works in conjunction with other modules to ensure that the battery pack 10 remains within a safe and stable operating temperature range.

[0094] In one embodiment of the present disclosure, reference Figure 2 , a thermal control system of a battery pack 10 further includes a pressure detection module 109;

[0095] The pressure detection module 109 is connected to the second liquid cooling module 105 and the second control module 103 respectively.

[0096] In this embodiment, the pressure detection module 109 is responsible for measuring the pressure of the coolant in the second liquid cooling module 105. Changes in the coolant's pressure during circulation can reflect the system's operating status. By detecting the pressure of the second liquid cooling module 105, the thermal control system can promptly adjust the coolant flow rate and flow rate to ensure effective cooling. If the pressure is abnormal, the system can take appropriate measures, such as checking the status of the electromagnetic door 106, to maintain appropriate cooling pressure and ensure that the battery pack 10 can be effectively cooled.

[0097] From the above, it can be concluded that the pressure detection module 109 provides key operating information for the thermal control system by real-time detection of the pressure in the second liquid cooling module 105, ensures the cooling effect, realizes fault warning, optimizes system performance, and works in coordination with other modules to ensure that the battery pack 10 is always within a safe and stable operating temperature range.

[0098] In one embodiment of the present disclosure, reference Figure 2 , a battery pack 10 thermal control system further includes a fault detection module 110 and an alarm module 111;

[0099] The fault detection module 110 and the alarm module 111 are both connected to the first control module 102 .

[0100] In this embodiment, the fault detection module 110 is connected to the first control module 102 and is responsible for real-time detection of various components and links in the thermal control system of the battery pack 10 to discover potential fault conditions.

[0101] The fault detection module 110 can identify abnormal situations in a timely manner by continuously detecting and analyzing parameters such as temperature, pressure, flow, etc. in the system, as well as checking the working status of each module.

[0102] The fault detection module 110 works in conjunction with the pressure detection module 109 to detect whether the pressure in the second liquid cooling module 105 is within a normal range. Too high a pressure may cause pipe rupture or seal failure, while too low a pressure may affect the cooling effect.

[0103] The fault detection module 110 is combined with the flow detection module 108 to detect the flow of the coolant in the first liquid cooling module 104. A low flow rate may be caused by a pipe blockage.

[0104] When the fault detection module 110 finds that there is a fault in the system, the alarm module 111 will send a corresponding alarm signal to alert the operator.

[0105] Alarm methods can include sound alarms, flashing lights and other forms, so as to attract the attention of operators in different environments.

[0106] As can be seen from the above, the fault detection module 110 can promptly detect potential faults in the system, and the alarm module 111 issues an alarm when a fault occurs, prompting the operator to take appropriate measures, thereby ensuring the safe and stable operation of the thermal control system of the battery pack 10. Therefore, this embodiment can improve the availability and reliability of the thermal control system.

[0107] In one embodiment of the present disclosure, reference Figure 2 , a battery pack 10 thermal control system further includes a communication module 112;

[0108] The first control module 102 communicates with the terminal through the communication module 112 .

[0109] In this embodiment, the communication module 112 establishes a connection channel between the first control module 102 and the terminal, enabling the first control module 102 to transmit various key information about the thermal control system of the battery pack 10 to the terminal. This information includes, but is not limited to, the overall temperature of the battery pack 10, the temperature of each battery cell 11, parameters such as the flow rate and pressure of the coolant, and system fault conditions.

[0110] Through the communication module 112, the terminal can remotely monitor the thermal control system of the battery pack 10. Operators can monitor the system's operating status in real time through the terminal while being located away from the battery pack 10, without having to go to the site for inspection.

[0111] The communication module 112 can also receive instructions from the terminal. The terminal can send control instructions to the first control module 102 according to actual needs to adjust the operating parameters of the thermal control system, such as adjusting the opening of the solenoid valve 106 or changing the working mode of the liquid cooling module.

[0112] From the above, it can be concluded that the communication module 112 realizes remote monitoring, command transmission and data sharing, improves the management efficiency, intelligence level and scalability of the system, provides strong guarantees for the safe and stable operation of the battery pack 10, and improves the reliability of the thermal control system of the battery pack 10.

[0113] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A battery pack thermal control system, characterized in that: It includes a first temperature detection module, a first control module, a second control module, a first liquid cooling module, a second liquid cooling module and a solenoid valve; The first temperature detection module is used to connect to the battery pack; The first control module is respectively connected to the first temperature detection module, the second control module, the first liquid cooling module and the solenoid valve; The solenoid valve is connected to the second liquid cooling module, and the solenoid valve is arranged at the water inlet of the second liquid cooling module; The first liquid cooling module is arranged at the bottom of the battery pack, and the second liquid cooling module is arranged at the top of the battery pack; The first temperature detection module is configured to detect the overall temperature of the battery pack; The first control module is configured to control the opening of the solenoid valve; The solenoid valve is configured to turn on or off the second liquid cooling module.

2. A battery pack thermal control system according to claim 1, characterized in that: Also includes a plurality of second temperature detection modules; The battery pack includes a plurality of battery cells; The plurality of second temperature detection modules are connected to the plurality of battery cells in a one-to-one correspondence.

3. A battery pack thermal control system according to claim 2, characterized in that: The first control module includes a comparison unit and a control unit; The comparison unit is respectively connected to the first temperature detection module, the plurality of second temperature detection modules and the control unit; The control unit is connected to the first liquid cooling module and the solenoid valve respectively.

4. A battery pack thermal control system according to claim 3, characterized in that: The first temperature detection module and the second temperature detection module have the same circuit structure; The first temperature detection module includes: a thermistor RT1, a resistor R1 and an amplifier U1; The first end of the thermistor RT1 is connected to the VCC power supply and the first temperature detection module respectively, the second end is connected to the first end of the resistor R1, and the second end of the resistor R1 is grounded; The second end of the thermistor RT1 is connected to the non-inverting input end of the amplifier U1; The inverting input terminal of the amplifier U1 is connected to the reference voltage Vref1; The output end of the amplifier U1 is connected to the comparison unit.

5. The battery pack thermal control system according to claim 1, characterized in that: Also includes a flow detection module; The flow unit is connected to the first liquid cooling module and the second control module respectively.

6. The battery pack thermal control system according to claim 1, characterized in that: Also includes a pressure detection module; The pressure detection module is connected to the second liquid cooling module and the second control module respectively.

7. The battery pack thermal control system according to claim 1, characterized in that: It also includes a fault detection module and an alarm module; The fault detection module and the alarm module are both connected to the first control module.

8. The battery pack thermal control system according to claim 1, characterized in that: Also included is a communication module; The first control module communicates with the terminal through the communication module.

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