Battery thermal management system and thermal management method

Abstract

The application discloses a battery thermal management system and a thermal management method, which comprise a temperature regulating plate, a pump body, a liquid inlet pipe, a liquid return pipe and a pressure regulating module, the temperature regulating plate is internally provided with a flow channel pipe for the circulation of a temperature regulating medium, the pipe diameter of the flow channel pipe changes with the change of the liquid pressure of the temperature regulating medium, and the temperature regulating plate is used for heat exchange with a battery cell to realize temperature regulation of the battery cell; the liquid inlet pipe is connected between the pump body and the inlet of the temperature regulating plate, the liquid return pipe is connected between the pump body and the outlet of the temperature regulating plate; the pressure regulating module is arranged on the liquid inlet pipe, and the pressure regulating module is used for regulating the liquid pressure of the temperature regulating medium flowing into the flow channel pipe. The pipe diameter of the flow channel pipe of the liquid cooling plate of the battery thermal management system can be adjusted, and then the flow and the flow resistance of the temperature regulating medium can be adjusted, so that the thermal management system can match different types of battery cells, and the overall adaptability is improved.

Description

Technical Field

[0001] This invention relates to the field of battery thermal management technology, specifically to a battery thermal management system and a thermal management method. Background Technology

[0002] In recent years, the new energy vehicle industry has developed rapidly, and as the power source for new energy vehicles, new energy battery packs have also seen rapid development. New energy battery packs generate heat during use, and when the battery pack temperature reaches a certain level, it severely impacts battery performance and lifespan. Therefore, most current battery packs are equipped with dedicated thermal management systems to regulate their operating temperature. Current thermal management systems are mostly liquid-cooled; however, many of these systems only design liquid cooling channels for a single battery cell, making them incompatible with different battery cells and resulting in poor overall compatibility. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] To address this, this invention proposes a battery thermal management system in which the diameter of the flow channel of the liquid cooling plate can be adjusted, thereby enabling adjustment of the flow rate and flow resistance of the temperature regulating medium. This allows the thermal management system to be compatible with different types of battery cells, improving overall adaptability.

[0005] This invention also proposes a thermal management method based on the above-described battery thermal management system.

[0006] The battery thermal management system of this invention includes:

[0007] A temperature regulating plate is provided with a flow channel pipe for the flow of temperature regulating medium. The diameter of the flow channel pipe changes with the hydraulic pressure of the temperature regulating medium. The temperature regulating plate is used to exchange heat with the battery cell to achieve temperature regulation of the battery cell.

[0008] The pump body, the inlet pipe, and the return pipe are provided. The inlet pipe is connected between the pump body and the inlet of the temperature control plate, and the return pipe is connected between the pump body and the outlet of the temperature control plate.

[0009] A pressure regulating module is provided in the inlet pipe and is used to regulate the hydraulic pressure of the temperature regulating medium flowing into the flow channel pipe.

[0010] In some embodiments, a pressure stabilizing module is further included, which is disposed in the liquid inlet pipe and located between the pressure regulating module and the temperature regulating plate.

[0011] In some embodiments, the pressure regulating module is a pressure regulating valve;

[0012] And / or, the voltage stabilizing module is a voltage stabilizing valve.

[0013] In some embodiments, a first sensor is further included, which is disposed at least one of the inlet pipe, the return pipe, and the temperature control plate, and the first sensor is used to monitor the hydraulic pressure and / or flow rate of the temperature control medium flowing to the flow channel pipe.

[0014] In some embodiments, the first sensor is provided at both the inlet and outlet of the temperature regulating plate.

[0015] In some embodiments, a second sensor is also included, which is disposed on the battery cell and used to monitor the temperature of the battery cell.

[0016] In some embodiments, a control module is further included, which is electrically connected to both the second sensor and the pressure regulating module, and is used to drive the pressure regulating module to adjust the pressure of the temperature regulating medium when the temperature information monitored by the second sensor is abnormal.

[0017] In some embodiments, the change in the diameter of the flow channel is positively correlated with the hydraulic pressure of the temperature regulating medium.

[0018] In some embodiments, the flow channel is made of carbon nanotubes;

[0019] And / or, the flow channel is arranged to bend and extend repeatedly within the temperature regulating plate.

[0020] The thermal management method of this invention includes the following steps:

[0021] The heat generation of the battery cell is calculated based on its parameters;

[0022] Based on the calorific value, the preset flow parameters of the temperature-regulating medium that meet the thermal management requirements are calculated;

[0023] The flow of the temperature-regulating medium is controlled using the preset flow parameters as preset values, and the actual flow parameters and the operating temperature of the battery cell are monitored during actual operation.

[0024] Based on the monitored actual flow parameters and operating temperature, it is determined whether the current state of the battery cell meets the thermal management requirements. If not, the hydraulic pressure of the temperature regulating medium is adjusted through the voltage regulating module. If the requirements are met, the adjustment of the voltage regulating module is stopped, and then the monitoring of the actual flow parameters and operating temperature continues.

[0025] Beneficial effects: The battery thermal management system and thermal management method of the present invention allow for adjustment of the diameter of the flow channel tube of the liquid cooling plate in the battery thermal management system, thereby enabling adjustment of the flow rate and flow resistance of the temperature regulating medium. This allows the thermal management system to be compatible with different types of battery cells, improving overall adaptability. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the battery thermal management system according to an embodiment of the present invention.

[0027] Figure 2 yes Figure 1 A schematic diagram of the temperature control plate.

[0028] Figure 3 yes Figure 2 A schematic diagram comparing the diameter of the flow channel pipe under different hydraulic conditions at point AA.

[0029] Figure 4 This is a flowchart of the thermal management method according to an embodiment of the present invention.

[0030] Figure label:

[0031] 1-Temperature regulating plate; 2-Pump body; 3-Inlet pipe; 4-Return pipe; 5-Pressure regulating module; 6-Pressure stabilizing module; 7-First sensor; 8-Battery cell; 9-Second sensor; 10-Flow channel pipe. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0034] Currently, liquid cooling is the most common cooling method in new energy vehicles, which requires the use of liquid cooling plates in the battery pack design. However, the following problems arise when matching the design of the liquid cooling plates with the battery pack system:

[0035] 1) Most of the power battery packs on the market at present adopt liquid cooling design. The liquid cooling plate is made of metal and the flow channel design is relatively fixed. If the heat generation of the cells in the battery pack increases or the water flow of the whole vehicle changes, the thermal management capability of the battery pack will be insufficient. If the flow channel of the liquid cooling plate needs to be changed, it needs to be redesigned and molded, which poses a great challenge to the development cycle and development cost of the battery pack.

[0036] 2) Currently, when battery manufacturers design thermal management systems for battery packs, they typically only calculate the heat generation of the cells in the current solution and match the flow channels of the liquid cooling plate. They do not consider the situation of matching the same liquid cooling plate when iterating on subsequent products or using high-rate cells, resulting in poor adaptability of the designed liquid cooling plate.

[0037] like Figure 1 As shown, the battery thermal management system of this embodiment includes a temperature regulating plate 1, a pump body 2, an inlet pipe 3, a return pipe 4, and a pressure regulating module 5.

[0038] The temperature regulating plate 1 is provided with a flow channel pipe 10 for the flow of temperature regulating medium. The diameter of the flow channel pipe 10 changes with the hydraulic pressure of the temperature regulating medium. The temperature regulating plate 1 is used to exchange heat with the battery cell 8 to achieve temperature regulation of the battery cell 8.

[0039] For example, such as Figure 1 and Figure 2 As shown, the temperature regulating plate 1 can be roughly flat. During installation, the temperature regulating plate 1 can be directly attached to the battery cell 8, and heat conduction can be achieved between the temperature regulating plate 1 and the battery cell 8, thereby meeting the need for temperature regulation of the battery cell 8.

[0040] The temperature regulating plate 1 may have a channel, and the flow channel 10 may be inserted through the channel. The radial dimension of the channel may be larger than the diameter of the flow channel 10, thereby providing deformation space for the deformation and expansion of the flow channel 10. It should be noted that the channel may always be in contact with the flow channel 10 in a certain direction, thereby meeting the requirement of good heat conduction between the temperature regulating medium in the flow channel 10 and the temperature regulating plate 1.

[0041] The flow channel tube 10 can be made of a material with deformable properties. Therefore, when the hydraulic pressure of the temperature-regulating medium introduced into the flow channel tube 10 changes, the diameter of the flow channel tube 10 can change with the change of hydraulic pressure, thereby satisfying the function of adjusting the flow rate and flow resistance of the temperature-regulating medium in the flow channel tube 10 by different hydraulic pressures.

[0042] Specifically, the change in the diameter of the flow channel 10 is positively correlated with the hydraulic pressure of the temperature regulating medium. That is, when the hydraulic pressure of the temperature regulating medium flowing into the flow channel 10 increases, the diameter of the flow channel 10 also increases accordingly under the action of hydraulic pressure, and when the hydraulic pressure of the temperature regulating medium flowing into the flow channel 10 decreases, the diameter of the flow channel 10 will also decrease as the hydraulic pressure decreases.

[0043] The inlet pipe 3 is connected between the pump body 2 and the inlet of the temperature regulating plate 1, and the return pipe 4 is connected between the pump body 2 and the outlet of the temperature regulating plate 1. For example, the pump body 2 can be a vehicle electronic water pump, and both the inlet pipe 3 and the return pipe 4 can be located on the left side of the temperature regulating plate 1 and can be arranged in parallel and spaced apart in the front and rear directions, wherein the inlet pipe 3 can be located in front of the return pipe 4.

[0044] The left end of the inlet pipe 3 can be connected to the outlet of the pump body 2, and the right end of the inlet pipe 3 can be connected to the inlet of the temperature regulating plate 1. The left end of the return pipe 4 can be connected to the inlet of the pump body 2, and the right end of the return pipe 4 can be connected to the outlet of the temperature regulating plate 1. The aforementioned flow channel pipe 10 can be directly connected between the inlet pipe 3 and the return pipe 4. That is, the inlet of the temperature regulating plate 1 can also be regarded as the inlet of the flow channel pipe 10, and the outlet of the temperature regulating plate 1 can also be regarded as the outlet of the flow channel pipe 10. In use, the pump body 2 can realize the circulation and delivery of the temperature regulating medium in the flow channel pipe 10, thereby meeting the needs of circulating liquid cooling of the battery cell 8.

[0045] The pressure regulating module 5 is located in the inlet pipe 3, and is used to regulate the hydraulic pressure of the temperature-regulating medium flowing into the flow channel pipe 10. For example, as Figure 1 As shown, the pressure regulating module 5 can be a pressure regulating valve, and it can be installed on the inlet pipe 3. In use, the pressure regulating valve can be used to adjust the hydraulic pressure of the temperature regulating medium flowing into the flow channel pipe 10, thereby adjusting the pipe diameter, flow rate, and flow resistance of the flow channel pipe 10.

[0046] The battery thermal management system of this invention has an adjustable pipe diameter for the flow channel 10 of the liquid cooling plate, which allows for adjustment of the flow rate and flow resistance of the temperature regulating medium. This enables the thermal management system to be compatible with different types of battery cells 8. By changing the hydraulic pressure of the temperature regulating medium, cooling adaptation for different types of battery cells 8 can be achieved, improving overall compatibility and avoiding the need for redesign and mold opening in the prior art, thus reducing the overall development cycle and cost of the battery pack.

[0047] In some embodiments, the battery thermal management system further includes a voltage regulator module 6, which is disposed in the liquid inlet pipe 3 and located between the voltage regulating module 5 and the temperature regulating plate 1. For example, as Figure 1 As shown, the pressure stabilizing module 6 can be a pressure stabilizing valve, which can be installed on the inlet pipe 3 and located downstream of the pressure regulating module 5. After the pressure regulating module 5 achieves hydraulic adjustment of the temperature regulating medium, the pressure and flow rate of the water flowing into the temperature regulating plate 1 can be prevented from fluctuating significantly by synchronously adjusting the pressure stabilizing module 6, thus ensuring the stability of the temperature regulation process.

[0048] In some embodiments, the battery thermal management system further includes a first sensor 7, which is disposed at least one of the inlet pipe 3, the return pipe 4, and the temperature regulating plate 1, and is used to monitor the hydraulic pressure and / or flow rate of the temperature regulating medium flowing to the flow channel pipe 10.

[0049] For example, such as Figure 1As shown, the first sensor 7 can be an integrated sensor, which may include a pressure sensor and a flow sensor. The first sensor 7 can be located at the inlet of the temperature control plate 1. By means of the first sensor 7, the flow rate and hydraulic pressure of the temperature control medium flowing into the flow channel pipe 10 can be monitored, thereby facilitating real-time understanding of the inflow of the temperature control medium and thus enabling a more comprehensive understanding of the operation of the battery cell 8.

[0050] In some embodiments, such as Figure 1 As shown, a first sensor 7 is installed at both the inlet and outlet of the temperature regulating plate 1. This allows for simultaneous monitoring of the flow rate and hydraulic pressure at both the inlet and outlet of the temperature regulating plate 1, ensuring the accuracy of the monitoring.

[0051] In some embodiments, the battery thermal management system further includes a second sensor 9, which is disposed on the battery cell 8 and used to monitor the temperature of the battery cell 8. For example, as Figure 1 As shown, multiple battery cells 8 are provided, and these multiple battery cells 8 can be arranged above the temperature control plate 1, and can generally be arranged in a matrix. The second sensor 9 can be an NTC temperature sensor, and multiple second sensors 9 can be provided, each of which can be located above the multiple battery cells 8 and in close contact with them. In use, the temperature of each battery cell 8 can be monitored by the multiple second sensors 9, thereby facilitating the understanding of the actual operating status of the battery cells 8, and also playing a role in timely outputting high temperature information or thermal runaway information.

[0052] In some embodiments, the battery thermal management system further includes a control module, which can be the BMS of the battery pack itself. The control module is electrically connected to both the second sensor 9 and the voltage regulation module 5, and the control module is used to drive the voltage regulation module 5 to adjust the pressure of the temperature regulation medium when the temperature information monitored by the second sensor 9 is abnormal.

[0053] Specifically, when the second sensor 9 detects that the operating temperature of the battery cell 8 is too high, the control module, upon receiving the corresponding monitoring signal, will control the voltage regulation module 5 to operate, thereby increasing the hydraulic pressure of the temperature regulating medium. At this time, the flow channel 10 will expand under the action of higher hydraulic pressure, as shown in the following example. Figure 3 As shown, Figure 3 Figure (a) shows the cross-section of the flow channel 10 when the hydraulic pressure is low, while Figure (b) shows the cross-section of the flow channel 10 after the hydraulic pressure of the temperature regulating medium is increased. It can be clearly seen from the figures that the diameter of the flow channel 10 in Figure (b) is larger than that in Figure (a). This can increase the flow rate of the temperature regulating medium and thus enhance the cooling and heat exchange effect.

[0054] In some embodiments, the flow channel 10 is made of carbon nanotubes. Carbon nanotubes have good toughness. When the pressure of the liquid flowing through the carbon nanotube is different, the carbon nanotube will expand or contract according to the different pressures on the tube wall, thereby achieving different thermal management effects in accordance with different liquid flow rates.

[0055] In some embodiments, the flow channel 10 is arranged in a zigzag pattern within the temperature regulating plate 1. For example, as... Figure 2 As shown, the flow channel tube 10 can be bent and extended repeatedly in the left and right directions, so that the flow channel tube 10 can be evenly distributed in the temperature control plate 1, and the two bent sections of the flow channel tube 10 can be relatively independent, avoiding contact and interference.

[0056] In some embodiments, the temperature regulating plate 1 can also be a hollow structure, with the flow channel tube 10 coiled inside. The temperature regulating plate 1 can be filled with an elastic medium, which can be distributed on the outer periphery of the flow channel tube 10. This elastic medium has good thermal conductivity and can specifically be a thermally conductive adhesive, etc. This improves the heat transfer between the flow channel tube 10 and the temperature regulating plate 1, and also allows the flow channel tube 10 to expand or contract as needed through its own deformation. Furthermore, the elastic medium also helps to limit and fix the flow channel tube 10, ensuring the overall stability of the temperature regulating plate 1.

[0057] The thermal management method according to an embodiment of the present invention is described below.

[0058] like Figure 4 As shown, the thermal management method of this invention includes the following steps:

[0059] S1: Calculate the heat generation of cell 8 based on its parameters. For example, the parameters of cell 8 can be input into the host computer, and then the heat generation of cell 8 during charging and discharging can be calculated by combining the cell 8 parameter table in the BMS.

[0060] S2: Calculate the preset flow parameters of the temperature-regulating medium that meet the thermal management requirements based on the calorific value. For example, the preset flow parameters may include liquid flow rate, flow resistance, etc. The flow rate and flow resistance values ​​of the temperature-regulating medium that meet the calorific value can be calculated based on the calorific value determined above.

[0061] S3: The flow of the temperature-regulating medium is controlled using preset flow parameters as preset values, and the actual flow parameters and the operating temperature of the battery cell 8 are monitored during actual operation. For example, once the preset flow parameters are determined, the flow of the temperature-regulating medium can be guided by the preset flow parameters to meet the usage requirements of the battery pack during initial operation.

[0062] It should be noted that the actual flow parameters can be considered as the parameters of the temperature-regulating medium during the actual operation of the battery pack. The actual flow parameters may also include liquid flow rate, flow resistance, etc. The operating temperature of cell 8 is the temperature value of cell 8 in actual use.

[0063] During battery pack operation, the flow rate of the current temperature regulating medium and the inlet and outlet pressure of the temperature regulating plate 1 can be monitored by the first sensor 7 to predict the current thermal management status. Simultaneously, during battery charging or discharging, the operating temperature of the battery cell 8 can be monitored by the NTC temperature sensor to verify whether the thermal management meets the requirements.

[0064] S4: Determine whether the current state of cell 8 meets the thermal management requirements based on the monitored actual flow parameters and operating temperature. If not, adjust the hydraulic pressure of the temperature regulating medium through the voltage regulating module 5. If it meets the requirements, stop adjusting the voltage regulating module 5 and continue monitoring the actual flow parameters and operating temperature.

[0065] For example, when the monitored temperature rises too quickly and the maximum temperature approaches the limit temperature, the control module can increase the liquid flow rate into the temperature regulating plate 1 by adjusting the water flow pressure regulating module 5. At the same time, it can synchronously adjust the pressure stabilizing module 6 to avoid fluctuations in the hydraulic pressure and flow rate entering the temperature regulating plate 1.

[0066] When the flow rate of the temperature-regulating medium entering the temperature-regulating plate 1 increases, the increased pressure in the pipe wall causes expansion pressure. At this time, the flow channel 10 within the temperature-regulating plate 1 widens, and the flow rate and flow resistance of the temperature-regulating medium change synchronously. Through monitoring by the first sensor 7 and adjustment of the pressure regulating module 5, the diameter of the flow channel 10 can reach a preset value. Then, the temperature can be monitored by an NTC temperature sensor to verify the thermal management adjustment effect until the monitored operating temperature meets normal operating requirements.

[0067] The battery thermal management system of this invention has the following beneficial effects:

[0068] (1) In the battery thermal management system of this invention, the temperature regulating plate has a variable flow channel structure design, which is different from the liquid cooling plate products currently on the market. Its flow channel is made of carbon nanotubes and is not made of metal. By utilizing the characteristics of nanomaterials, different pressures can be applied to the tube wall by controlling the internal liquid pressure, thereby realizing the adjustment of the flow cross section of the flow channel. Compared with metal flow channels, it increases variability, which can be intelligently adjusted according to the different heating states of different cells or battery packs. It can match different cells to avoid re-molding and effectively shorten the development cycle and development cost of battery packs.

[0069] (2) An enhanced control strategy for the adaptability of the battery pack thermal management system allows for the calculation of heat generation during charging and discharging, as well as the flow rate and flow resistance of the temperature-regulating medium that meet thermal management requirements, by inputting the currently matched cell parameters into the host computer. Then, by adjusting the liquid pressure, the flow channel structure of the temperature-regulating plate can be changed, thereby meeting the thermal management needs of the battery pack for different cells or under different operating conditions. This enhances the adaptability of the thermal management system and facilitates subsequent product iterations or the matching application of high-rate cells.

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A battery thermal management system, characterized in that, include: A temperature regulating plate is provided with a flow channel tube for the flow of a temperature regulating medium. The flow channel tube is made of carbon nanotubes, and its diameter changes with the hydraulic pressure of the temperature regulating medium. The temperature regulating plate is in direct contact with the battery cell for heat exchange to achieve temperature control of the battery cell. The temperature regulating plate is filled with an elastic medium, which is distributed on the outer periphery of the flow channel tube and has good thermal conductivity. The temperature regulating plate has a channel, and the flow channel tube passes through the channel. The radial dimension of the channel is larger than the diameter of the flow channel tube. The flow channel tube is arranged in a zigzag extension within the temperature regulating plate. The pump body, the inlet pipe, and the return pipe are provided. The inlet pipe is connected between the pump body and the inlet of the temperature control plate, and the return pipe is connected between the pump body and the outlet of the temperature control plate. A pressure regulating module is provided in the inlet pipe and is used to regulate the hydraulic pressure of the temperature regulating medium flowing into the flow channel pipe. The change in the diameter of the flow channel pipe is positively correlated with the hydraulic pressure of the temperature regulating medium.

2. The battery thermal management system according to claim 1, characterized in that, It also includes a pressure stabilizing module, which is located in the liquid inlet pipe and between the pressure regulating module and the temperature regulating plate.

3. The battery thermal management system according to claim 2, characterized in that, The pressure regulating module is a pressure regulating valve; And / or, the voltage stabilizing module is a voltage stabilizing valve.

4. The battery thermal management system according to claim 1, characterized in that, It also includes a first sensor, which is disposed at least one of the inlet pipe, the return pipe, and the temperature control plate, and the first sensor is used to monitor the hydraulic pressure and / or flow rate of the temperature control medium flowing to the flow channel pipe.

5. The battery thermal management system according to claim 4, characterized in that, The first sensor is installed at both the inlet and outlet of the temperature regulating plate.

6. The battery thermal management system according to claim 1, characterized in that, It also includes a second sensor, which is located on the battery cell and used to monitor the temperature of the battery cell.

7. The battery thermal management system according to claim 6, characterized in that, It also includes a control module, which is electrically connected to both the second sensor and the pressure regulating module. The control module is used to drive the pressure regulating module to adjust the pressure of the temperature regulating medium when the temperature information monitored by the second sensor is abnormal.

8. A thermal management method based on the battery thermal management system according to any one of claims 1-7, characterized in that, Includes the following steps: The heat generation of the battery cell is calculated based on its parameters; Based on the calorific value, the preset flow parameters of the temperature-regulating medium that meet the thermal management requirements are calculated; The flow of the temperature-regulating medium is controlled using the preset flow parameters as preset values, and the actual flow parameters and the operating temperature of the battery cell are monitored during actual operation. Based on the monitored actual flow parameters and operating temperature, it is determined whether the current state of the battery cell meets the thermal management requirements. If not, the hydraulic pressure of the temperature regulating medium is adjusted through the voltage regulating module. If the requirements are met, the adjustment of the voltage regulating module is stopped, and the monitoring of the actual flow parameters and operating temperature continues.

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