Dual-medium cooling plate, power battery thermal management method, and related equipment

Abstract

This invention discloses a dual-medium cooling plate, a power battery thermal management method, and related equipment. The dual-medium cooling plate includes: an upper plate and a lower plate, which are sealed together to form an internal cavity; a liquid cooling channel and a direct cooling channel disposed within the internal cavity; a coolant inlet and a coolant outlet communicating with the liquid cooling channel; and a refrigerant inlet and a refrigerant outlet communicating with the direct cooling channel; wherein the liquid cooling channel and the direct cooling channel are staggered in the plane of the dual-medium cooling plate.

Description

Technical Field

[0001] This application belongs to the field of power battery thermal management, specifically relating to a dual-medium cooling plate, a power battery thermal management method, an electronic device, and a computer-readable storage medium. Background Technology

[0002] With the widespread application of power batteries in the vehicle field, the performance of their thermal management system is crucial to battery safety, range, and lifespan. Currently, although the direct cooling thermal management system can ensure battery thermal safety under complex temperature environments and high load conditions, it has the problem of high energy consumption. Continuing to use direct cooling under normal temperature and low load conditions is not conducive to the economic needs of power batteries, and can easily lead to battery energy waste and limited range. At the same time, existing battery cold plates mainly adopt a single medium flow channel design. Although some solutions involve dual media, the unreasonable flow channel layout often affects the stability of battery performance, and cannot take into account both the economy and temperature uniformity of thermal management in practical applications. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a dual-medium cooling plate that can solve the problems of high energy consumption when direct cooling operates alone under high load, waste of battery energy and limited driving range when using direct cooling continuously under low load at room temperature, and difficulty in optimizing the temperature uniformity of existing cold plate flow channels.

[0004] To achieve the above objectives, a first aspect of the present invention provides a dual-medium cooling plate, comprising: an upper plate and a lower plate, the upper plate and the lower plate being sealed together to form an internal cavity; a liquid cooling channel and a direct cooling channel disposed within the internal cavity; a coolant inlet and a coolant outlet communicating with the liquid cooling channel; and a refrigerant inlet and a refrigerant outlet communicating with the direct cooling channel; wherein the liquid cooling channel and the direct cooling channel are staggered in the plane of the dual-medium cooling plate.

[0005] In some embodiments, the liquid cooling channel includes a first inflow mainstream channel, a second inflow mainstream channel, and a first outflow mainstream channel, with the first inflow mainstream channel and the second inflow mainstream channel located on opposite sides of the first outflow mainstream channel; the direct cooling channel includes a third inflow mainstream channel, a second outflow mainstream channel, and a third outflow mainstream channel, with the third inflow mainstream channel located between the second outflow mainstream channel and the third outflow mainstream channel; the flow direction of the mainstream channel of the liquid cooling channel is opposite to that of the mainstream channel of the direct cooling channel.

[0006] In some embodiments, both the liquid cooling channel and the direct cooling channel are S-shaped channels embedded in the internal cavity.

[0007] In some embodiments, the cross-sectional area of ​​the direct cooling channel is smaller than that of the liquid cooling channel.

[0008] In some embodiments, the coolant inlet, coolant outlet, and refrigerant interface are located on the upper plate.

[0009] According to an embodiment of the present invention, a dual-medium cooling plate includes: an upper plate and a lower plate, the upper plate and the lower plate being sealed together to form an internal cavity; a liquid cooling channel and a direct cooling channel disposed within the internal cavity; a coolant inlet and a coolant outlet communicating with the liquid cooling channel; and a refrigerant inlet and a refrigerant outlet communicating with the direct cooling channel; wherein the liquid cooling channel and the direct cooling channel are staggered in the plane of the dual-medium cooling plate. Therefore, this application can solve the problems of high energy consumption when direct cooling operates alone under high load, the waste of battery energy and limited driving range when using direct cooling continuously under low load at normal temperature, and the difficulty in optimizing the temperature uniformity of existing cold plate flow channels. By integrating liquid cooling and direct cooling flow channels inside the cooling plate, the appropriate cooling or heating mode can be selected according to the actual needs of different temperature environments and load conditions. Under high load scenarios, the reasonable combination of the two flow channels replaces the single direct cooling operation, reducing unnecessary energy consumption and allowing more battery energy to be used for vehicle driving, effectively extending the actual driving range of the power battery. Through the layout of liquid cooling and direct cooling flow channels with opposite flow directions, the heat exchange range of the two media is intertwined and complementary, making the temperature distribution of the entire power battery pack more uniform and significantly improving the stability and consistency of battery performance.

[0010] To achieve the above objectives, a second aspect of the present invention provides a power battery thermal management method, applied to a dual-medium cooling plate as described above. The method includes: monitoring the real-time temperature of the power battery pack; determining the real-time operating condition of the power battery pack based on the real-time temperature; and selectively activating or combining the activation of a liquid-heating cycle, a liquid-cooling cycle, a direct-heating cycle, or a direct-cooling cycle connected to the dual-medium cooling plate based on the real-time operating condition, to heat or cool the power battery pack; wherein the liquid-heating cycle and the liquid-cooling cycle are connected to a liquid-cooling channel through a coolant inlet and a coolant outlet, and the direct-heating cycle and the direct-cooling cycle are connected to a direct-cooling channel through a refrigerant inlet and a refrigerant outlet.

[0011] In some embodiments, determining the real-time operating condition of the power battery pack based on the real-time temperature includes: determining the real-time operating condition of the power battery pack as a preheating stage in response to the real-time temperature of the power battery pack not exceeding a first temperature threshold; determining the real-time operating condition of the power battery pack as a rapid heating stage in response to the real-time temperature of the power battery pack exceeding the first temperature threshold but not exceeding a second temperature threshold; determining the real-time operating condition of the power battery pack as a heat preservation stage in response to the real-time temperature of the power battery pack exceeding the second temperature threshold but not exceeding a third temperature threshold; and selectively activating or combining the activation of a liquid thermal cycle, liquid cooling cycle, direct heating cycle, or direct cooling cycle connected to the dual-medium cooling plate to regulate the power battery pack. Heating or cooling includes: responding to the real-time operating condition of the power battery pack being in the preheating stage, initiating liquid thermal circulation and controlling the coolant temperature to be the sum of the real-time temperature and a first preset temperature to preheat the power battery pack; responding to the real-time operating condition of the power battery pack being in the rapid heating stage, initiating liquid thermal circulation and controlling the coolant temperature to be the sum of the real-time temperature and a second preset temperature to rapidly heat the power battery pack; responding to the real-time operating condition of the power battery pack being in the heat preservation stage, initiating liquid thermal circulation and direct heating circulation and controlling the coolant temperature to a third preset temperature to preserve the power battery pack; wherein the third preset temperature is greater than the second preset temperature, and the second preset temperature is greater than the first preset temperature.

[0012] In some embodiments, determining the real-time operating condition of the power battery pack based on the real-time temperature includes: determining the real-time operating condition of the power battery pack as a pre-cooling stage in response to the real-time temperature of the power battery pack being not less than a fourth temperature threshold and less than a fifth temperature threshold; determining the real-time operating condition of the power battery pack as an enhanced cooling stage in response to the real-time temperature of the power battery pack being not less than a fifth temperature threshold and less than a sixth temperature threshold; determining the real-time operating condition of the power battery pack as an extreme cooling stage in response to the real-time temperature of the power battery pack being not less than a sixth temperature threshold; and selectively activating or combining the activation of a liquid thermal cycle, liquid cooling cycle, direct heating cycle, or direct cooling cycle connected to the dual-medium cooling plate to cool the power battery pack based on the real-time operating condition. Heating or cooling is performed, including: in response to the real-time operating condition of the power battery pack being in the pre-cooling stage, initiating liquid cooling circulation and controlling the coolant temperature to be the difference between the real-time temperature and a first preset temperature to pre-cool the power battery pack; in response to the real-time operating condition of the power battery pack being in the enhanced cooling stage, initiating liquid cooling circulation and direct cooling circulation and controlling the coolant temperature to a second preset temperature to enhance cooling the power battery pack; in response to the real-time operating condition of the power battery pack being in the extreme cooling stage, initiating liquid cooling circulation and direct cooling circulation and controlling the coolant temperature to a fourth preset temperature to extreme cooling the power battery pack; wherein the second preset temperature is greater than the first preset temperature, and the fourth preset temperature is less than the first preset temperature.

[0013] According to an embodiment of the present invention, a power battery thermal management method is applied to a dual-medium cooling plate as described above. The method includes: monitoring the real-time temperature of the power battery pack; determining the real-time operating condition of the power battery pack based on the real-time temperature; and selectively activating or combining the activation of a liquid-heating cycle, a liquid-cooling cycle, a direct-heating cycle, or a direct-cooling cycle connected to the dual-medium cooling plate based on the real-time operating condition, so as to heat or cool the power battery pack; wherein the liquid-heating cycle and the liquid-cooling cycle are connected to a liquid-cooling channel through a coolant inlet and a coolant outlet, and the direct-heating cycle and the direct-cooling cycle are connected to a direct-cooling channel through a refrigerant inlet and a refrigerant outlet. Therefore, this application solves the problems of high energy consumption when direct cooling operates alone under high load, the waste of battery energy and limited driving range when using direct cooling continuously under low load at normal temperature, and the difficulty in optimizing the temperature uniformity of existing cold plate flow channels. By integrating liquid cooling and direct cooling flow channels inside the cooling plate, the appropriate cooling or heating mode can be selected according to the actual needs of different temperature environments and load conditions. Under high load scenarios, the reasonable combination of the two flow channels replaces the single direct cooling operation, reducing unnecessary energy consumption and allowing more battery energy to be used for vehicle driving, effectively extending the actual driving range of the power battery. Through the layout of liquid cooling and direct cooling flow channels with opposite flow directions, the heat exchange range of the two media is intertwined and complementary, making the temperature distribution of the entire power battery pack more uniform and significantly improving the stability and consistency of battery performance.

[0014] To achieve the above objectives, a third aspect of the present invention provides an electronic device, comprising: a processor and a memory, wherein the memory stores a program or instructions executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the power battery thermal management method as described above.

[0015] According to the electronic device of the present invention, by implementing the above-described power battery thermal management method, the problems of high energy consumption when direct cooling operates alone under high load, limited driving range due to the waste of battery energy caused by continuous use of direct cooling under normal temperature and low load, and difficulty in optimizing the temperature uniformity of existing cold plate flow channels can be solved. By integrating liquid cooling and direct cooling flow channels inside the cooling plate, the appropriate cooling or heating mode can be selected according to the actual needs of different temperature environments and load conditions. Under high load scenarios, the reasonable combination of the two flow channels replaces the single direct cooling operation, reducing unnecessary energy consumption and allowing more battery energy to be used for vehicle driving, effectively extending the actual driving range of the power battery. Through the layout of liquid cooling and direct cooling flow channels with opposite flow directions, the heat exchange range of the two media is intertwined and complementary, making the temperature distribution of the entire power battery pack more uniform and significantly improving the stability and consistency of battery performance.

[0016] To achieve the above objectives, a fourth aspect of the present invention provides a computer-readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the power battery thermal management method as described above.

[0017] According to the computer-readable storage medium of the present invention, by executing the above-described power battery thermal management method, the problems of high energy consumption of direct cooling alone under high load, waste of battery energy and limited driving range due to continuous use of direct cooling under normal temperature and low load, and difficulty in optimizing the temperature uniformity of existing cold plate flow channels can be solved. By integrating liquid cooling and direct cooling flow channels inside the cooling plate, the appropriate cooling or heating mode can be selected according to the actual needs of different temperature environments and load conditions. Under high load scenarios, the reasonable combination of the two flow channels replaces the single direct cooling operation, reducing unnecessary energy consumption and allowing more battery energy to be used for vehicle driving, effectively extending the actual driving range of the power battery. Through the layout of liquid cooling and direct cooling flow channels with opposite flow directions, the heat exchange range of the two media is intertwined and complementary, making the temperature distribution of the entire power battery pack more uniform and significantly improving the stability and consistency of battery performance.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a dual-medium cooling plate in an embodiment of this application; Figure 2 This is a schematic diagram of the liquid cooling channel of a dual-medium cooling plate in an embodiment of this application; Figure 3 This is a schematic diagram of the direct cooling channel of a dual-medium cooling plate in an embodiment of this application; Figure 4 This is a flowchart illustrating a power battery thermal management method according to an embodiment of this application. Figure 5 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0020] Reference numerals: Dual-medium cooling plate 100, upper plate 11, lower plate 12, liquid cooling channel 121, direct cooling channel 122, coolant inlet 123, coolant outlet 124, refrigerant interface 125, refrigerant inlet 1251, refrigerant outlet 1252, first inflow mainstream channel 1211, second inflow mainstream channel 1212, first outflow mainstream channel 1213, third inflow mainstream channel 1221, second outflow mainstream channel 1222, third outflow mainstream channel 1223, processor 510, memory 520, input / output interface 530, communication interface 540, bus 550. Detailed Implementation

[0021] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0022] It should be understood that the steps described in the method embodiments of this application may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this application is not limited in this respect.

[0023] As described in the background section, in the field of power battery thermal management, the cooling plate is a core component, and its performance directly affects the thermal safety, driving range, and service life of the power battery. Power batteries face complex and variable temperature environments and load conditions during vehicle operation, which places stringent requirements on the cooling plate's medium adaptability, temperature uniformity control capability, and engineering practicality.

[0024] Currently, power battery cooling solutions in the industry are divided into single-medium direct cooling and single-medium liquid cooling. Existing cooling plate flow channels are mostly single-layout, mainly relying on simple models to verify energy-saving advantages. A single direct cooling system can ensure battery thermal safety under high-load and complex temperature environments, but its operating energy consumption is relatively high. Continuing to use direct cooling under normal temperature and low-load conditions will waste battery power and shorten the vehicle's driving range. A single liquid cooling system has lower energy consumption, but it is difficult to meet the strong temperature control requirements under extreme conditions. The dual-medium flow channels in related technologies are not designed reasonably, resulting in the heat exchange range of the two media not being complementary. Some flow channels do not consider flow direction adaptation and uniform distribution, resulting in uneven temperature field distribution of the entire power battery pack. Excessive temperature difference can easily lead to a decrease in the consistency of cell performance, affecting the overall operational stability and service life of the battery.

[0025] To address the shortcomings of existing power battery cooling plates, the dual-medium cooling plate of this invention designs liquid cooling and direct cooling dual channels as complementary channels with opposite flow directions. Combined with thermal management logic adapted to operating conditions, it can solve problems such as poor adaptability to operating conditions, energy consumption imbalance, and insufficient temperature uniformity, and realize flexible switching of cooling modes under different operating conditions, avoiding energy waste and performance risks caused by a single cooling mode.

[0026] Liquid cooling is an indirect heat exchange method using coolant as the heat transfer medium. The coolant circulates within the cooling plate channels, exchanging heat with the battery pack. In heating mode, the heat source heats the coolant, which then supplies heat to the battery. In cooling mode, the heat carried by the coolant is transferred to the external environment through a heat exchanger. Direct cooling, on the other hand, is a heat exchange method using refrigerant as the heat transfer medium. The refrigerant directly enters the cooling plate channels and exchanges heat with the battery pack through a phase change process (evaporation absorbs heat, condensation releases heat).

[0027] The following is for reference. Figures 1-3 This application describes a dual-medium cooling plate provided in an embodiment.

[0028] like Figure 1 The diagram shown is a structural schematic of a dual-medium cooling plate according to an embodiment of this application. The dual-medium cooling plate 100 includes: an upper plate 11 and a lower plate 12, which are sealed together to form an internal cavity; a liquid cooling channel 121 and a direct cooling channel 122 disposed in the internal cavity; a coolant inlet 123 and a coolant outlet 124 communicating with the liquid cooling channel 121; and a refrigerant inlet 1251 and a refrigerant outlet 1252 communicating with the direct cooling channel 122. The liquid cooling channel 121 and the direct cooling channel 122 are staggered in the plane of the dual-medium cooling plate 100.

[0029] As an optional embodiment, the coolant inlet 123, coolant outlet 124, and refrigerant interface 125 are disposed on the upper plate 11.

[0030] Specifically, the upper plate 11 and the lower plate 12 are sealed together to form an internal cavity. Together with the coolant inlet 123, coolant outlet 124 and refrigerant interface 125 connected to the two flow channels, a dual-medium circulation loop that does not interfere with each other is formed. The liquid cooling flow channel 121 and the direct cooling flow channel 122 are staggered in the plane of the dual-medium cooling plate 100, fully spread in the plate space and achieve mutual penetration and coverage of the heat exchange area. The liquid cooling achieves gentle heat transfer based on the sensible heat exchange of the coolant, while the direct cooling achieves efficient heat exchange by means of the latent heat of phase change of the coolant. In this way, the influence range of the two heat transfer methods is superimposed, and the heat is evenly transferred in the plane of the plate, making the temperature field distribution of the entire power battery pack more balanced.

[0031] As an optional embodiment, the liquid cooling channel 121 includes a first inflow mainstream channel 1211, a second inflow mainstream channel 1212, and a first outflow mainstream channel 1213, with the first inflow mainstream channel 1211 and the second inflow mainstream channel 1212 located on opposite sides of the first outflow mainstream channel 1213; the direct cooling channel 122 includes a third inflow mainstream channel 1221, a second outflow mainstream channel 1222, and a third outflow mainstream channel 1223, with the third inflow mainstream channel 1221 located between the second outflow mainstream channel 1222 and the third outflow mainstream channel 1223; the flow direction of the mainstream channel of the liquid cooling channel 121 is opposite to that of the mainstream channel of the direct cooling channel 122.

[0032] Specifically, refer to Figure 2 This is a schematic diagram of the liquid cooling channel 121 of a dual-medium cooling plate 100 in an embodiment of this application. Liquid cooling transfers heat using coolant, requiring uniform heat exchange across the entire area. A dual-inflow, single-outflow layout allows for balanced flow distribution of the coolant before it enters the branch channel, ensuring that the temperature control effect of liquid cooling covers the entire cooling plate area. (Reference) Figure 3 This is a schematic diagram of the direct cooling channel 122 of a dual-medium cooling plate 100 in this embodiment of the application. Direct cooling refrigerant is prone to a sudden temperature drop due to strong local heat exchange. The single-inflow, dual-outflow layout disperses the refrigerant heat, allowing the phase change process to proceed uniformly in the branch channels, alleviating local overcooling. The staggered spatial arrangement of the liquid cooling channel 121 and the direct cooling channel 122 allows the heat exchange areas of the two media to mutually penetrate and cover each other, reducing the temperature control blind zone of a single medium. The main flow direction of the liquid cooling channel 121 is opposite to that of the main flow direction of the direct cooling channel 122, maintaining a large heat exchange temperature difference. The gentle sensible heat exchange of liquid cooling buffers temperature fluctuations, allowing the phase change heat exchange of direct cooling to exert its rapid cooling advantage and optimizing the temperature field distribution of the entire power battery pack.

[0033] As an optional embodiment, both the liquid cooling channel 121 and the direct cooling channel 122 are S-shaped channels embedded in the internal cavity.

[0034] Specifically, the S-shaped flow channel can extend the flow path of the medium in the cooling plate, maximizing the heat exchange area without increasing the volume of the cooling plate, allowing the coolant or refrigerant to have more sufficient contact with the cooling plate, and improving the heat transfer efficiency. At the same time, this structure can guide the medium to form a stable and uniform flow rate, avoiding the problem of excessively fast local flow rate or stagnation that is prone to occur in straight flow channels, making the heat exchange process more gentle and stable.

[0035] As an optional embodiment, the cross-sectional area of ​​the direct cooling channel 122 is smaller than the cross-sectional area of ​​the liquid cooling channel 121.

[0036] Specifically, based on the difference in working pressure between liquid cooling and direct cooling, the cross-sectional area of ​​the direct cooling channel 122 is smaller than that of the liquid cooling channel 121. The narrower cross-sectional area of ​​the channel can improve the pressure resistance of the channel structure and avoid the risk of channel deformation or medium leakage caused by high pressure. Direct cooling relies on the latent heat of refrigerant phase change for heat exchange, which has a higher heat exchange efficiency than the sensible heat of coolant in liquid cooling. Combined with the small cross-sectional area, the refrigerant flow rate can be appropriately increased, further enhancing the heat exchange efficiency during the phase change process. The working pressure of the liquid cooling system is relatively low, and the larger cross-sectional area of ​​the channel can reduce the flow resistance of the coolant, reduce the energy consumption of the water pump drive, and improve the heat carrying capacity.

[0037] In summary, the dual-medium cooling plate provided according to the embodiments of this application includes: an upper plate and a lower plate, the upper plate and the lower plate being sealed together to form an internal cavity; a liquid cooling channel and a direct cooling channel disposed within the internal cavity; a coolant inlet and a coolant outlet communicating with the liquid cooling channel; and a refrigerant inlet and a refrigerant outlet communicating with the direct cooling channel; wherein the liquid cooling channel and the direct cooling channel are staggered in the plane of the dual-medium cooling plate. Therefore, this application can solve the problems of high energy consumption when direct cooling operates alone under high load, the waste of battery energy and limited driving range when using direct cooling continuously under low load at normal temperature, and the difficulty in optimizing the temperature uniformity of existing cold plate flow channels. By integrating liquid cooling and direct cooling flow channels inside the cooling plate, the appropriate cooling or heating mode can be selected according to the actual needs of different temperature environments and load conditions. Under high load scenarios, the reasonable combination of the two flow channels replaces the single direct cooling operation, reducing unnecessary energy consumption and allowing more battery energy to be used for vehicle driving, effectively extending the actual driving range of the power battery. Through the layout of liquid cooling and direct cooling flow channels with opposite flow directions, the heat exchange range of the two media is intertwined and complementary, making the temperature distribution of the entire power battery pack more uniform and significantly improving the stability and consistency of battery performance.

[0038] refer to Figure 4 This is a flowchart illustrating a power battery thermal management method according to an embodiment of this application. The power battery thermal management method according to an embodiment of this application may include the following steps: Step S401: Monitor the real-time temperature of the power battery pack.

[0039] Specifically, several thermistor temperature sensors are installed inside the power battery pack. The installation positions of the sensors cover the core heat-generating area on the surface of the battery cell, the weak heat dissipation area between modules, and the temperature detection points of the medium at the inlet and outlet of the cooling plate, so as to capture the temperature distribution characteristics of the entire battery pack. After the analog signal output by the sensor is filtered and conditioned to eliminate electromagnetic interference, it can be transmitted to the power battery management system through the CAN bus, and the sampling frequency is dynamically adjusted according to the real-time operating conditions of the battery.

[0040] Step S402: Determine the real-time operating condition of the power battery pack based on the real-time temperature.

[0041] Specifically, when the average temperature of the entire battery pack is lower than the lower limit of the optimal operating temperature, a heating strategy needs to be activated. When the temperature of the core heat-generating area of ​​the battery pack is higher than the upper limit of the optimal operating temperature, or when the temperature rise rate exceeds the set threshold in a short period of time, a cooling strategy needs to be activated. When the temperature is in the optimal range and the temperature rise rate is stable, no active adjustment is required.

[0042] Step S403: Based on real-time operating conditions, selectively activate or combine the activation of the liquid thermal cycle, liquid cooling cycle, direct heating cycle, or direct cooling cycle connected to the dual-medium cooling plate to heat or cool the power battery pack; wherein, the liquid thermal cycle and liquid cooling cycle are connected to the liquid cooling channel through the coolant inlet and coolant outlet, and the direct heating cycle and direct cooling cycle are connected to the direct cooling channel through the refrigerant inlet and refrigerant outlet.

[0043] Specifically, the liquid cooling cycle involves the coolant fully contacting and exchanging heat with the battery in an S-shaped flow channel. After absorbing heat from the battery, the coolant flows out from the coolant outlet and enters the heat exchanger to dissipate the heat. The cooled coolant then flows back to form a closed loop, achieving gentle cooling of the battery. The liquid heating cycle involves the coolant being heated by an external heater before flowing into the liquid cooling channel to release heat to heat the battery. The cooled coolant then flows back to the circulation, adapting to stable temperature rise under low-temperature conditions. The direct cooling cycle involves the compressor driving the refrigerant, which undergoes an evaporation phase change in the direct cooling channel, rapidly absorbing a large amount of heat from the battery. The gaseous refrigerant flows out from the outlet and is condensed into a liquid state by the condenser. It then flows back through the expansion valve to reduce pressure, achieving efficient cooling. The direct heating cycle involves the refrigerant being compressed into a high-temperature, high-pressure gaseous state by the compressor, flowing into the direct cooling channel to release phase change heat to heat the battery, and then being depressurized and cooled by the expansion valve to complete the cycle, achieving rapid temperature rise.

[0044] As an optional embodiment, determining the real-time operating condition of the power battery pack based on the real-time temperature includes: determining the real-time operating condition of the power battery pack as a preheating stage in response to the real-time temperature of the power battery pack not exceeding a first temperature threshold; determining the real-time operating condition of the power battery pack as a rapid heating stage in response to the real-time temperature of the power battery pack exceeding the first temperature threshold but not exceeding a second temperature threshold; determining the real-time operating condition of the power battery pack as a heat preservation stage in response to the real-time temperature of the power battery pack exceeding the second temperature threshold but not exceeding a third temperature threshold; and selectively activating or combining the activation of a liquid thermal cycle, liquid cooling cycle, direct heating cycle, or direct cooling cycle connected to the dual-medium cooling plate to regulate the power battery pack's temperature. The battery pack is heated or cooled, including: in response to the real-time operating condition of the power battery pack being in the preheating stage, initiating liquid thermal circulation and controlling the coolant temperature to be the sum of the real-time temperature and a first preset temperature to preheat the power battery pack; in response to the real-time operating condition of the power battery pack being in the rapid heating stage, initiating liquid thermal circulation and controlling the coolant temperature to be the sum of the real-time temperature and a second preset temperature to rapidly heat the power battery pack; in response to the real-time operating condition of the power battery pack being in the heat preservation stage, initiating liquid thermal circulation and direct heating circulation and controlling the coolant temperature to be a third preset temperature to preserve the power battery pack; wherein the third preset temperature is greater than the second preset temperature, and the second preset temperature is greater than the first preset temperature.

[0045] Specifically, when the real-time temperature of the power battery pack is not greater than the first temperature threshold (-15℃), the real-time operating condition of the power battery pack is determined to be the preheating stage. At this time, the battery is in an extremely low temperature state, and the internal resistance surges, causing a significant drop in available power. The system starts liquid thermal circulation to achieve gentle heat exchange throughout the entire area. The coolant temperature is controlled to be the sum of the real-time temperature and the first preset temperature (+15℃). The system heats slowly with low power. The heating power is dynamically adjusted in combination with the battery SOC (State of Charge, which refers to the proportion of the battery's current remaining charge to its rated capacity) and real-time internal resistance to avoid excessive battery discharge at low temperatures, which would exacerbate performance loss. The temperature sensor monitors the temperature of the entire battery pack to ensure that the heating process is stable and without sudden changes. When the real-time temperature of the power battery pack is greater than the first temperature threshold (-15℃) but not greater than the second temperature threshold (0℃), the real-time operating condition of the power battery pack is determined to be the rapid heating stage. At this time, the battery power has gradually recovered, the system maintains liquid thermal circulation, raises the coolant temperature to the sum of the real-time temperature and the second preset temperature (+20℃) to increase the heating power, shorten the preheating time, dynamically adjusts the power according to the real-time battery temperature to avoid overheating, and gradually increases the battery discharge power to ensure that the battery can provide appropriate power output during the heating process. When the real-time temperature of the power battery pack is greater than the second temperature threshold (0℃) but not greater than the third temperature threshold (10℃), the real-time operating condition of the power battery pack is determined to be the heat preservation stage. At this time, the battery is maintained in the optimal operating temperature range. The system starts liquid thermal circulation and direct heating circulation. Liquid thermal circulation provides a stable and gentle heat supply with the help of the large cross-sectional area structure of the liquid cooling channel. Direct heating circulation uses the direct cooling channel, whose narrower channel can adapt to high-pressure conditions, thereby achieving precise temperature control. Liquid thermal circulation and direct heating circulation together stabilize the coolant / refrigerant temperature at the third preset temperature (25℃). The system adopts a constant temperature control strategy, adjusts the heating power of the dual circulation according to the battery load demand, and continuously monitors the temperature and internal resistance changes to ensure that the battery outputs stable power in a stable temperature range.

[0046] As an optional embodiment, determining the real-time operating condition of the power battery pack based on the real-time temperature includes: determining the real-time operating condition of the power battery pack as a pre-cooling stage in response to the real-time temperature of the power battery pack being not less than a fourth temperature threshold and less than a fifth temperature threshold; determining the real-time operating condition of the power battery pack as an enhanced cooling stage in response to the real-time temperature of the power battery pack being not less than a fifth temperature threshold and less than a sixth temperature threshold; determining the real-time operating condition of the power battery pack as an extreme cooling stage in response to the real-time temperature of the power battery pack being not less than a sixth temperature threshold; and selectively activating or combining the activation of a liquid thermal cycle, liquid cooling cycle, direct heating cycle, or direct cooling cycle connected to the dual-medium cooling plate to regulate the power battery temperature. The battery pack is heated or cooled, including: in response to the real-time operating condition of the power battery pack being in the pre-cooling stage, initiating a liquid cooling cycle and controlling the coolant temperature to be the difference between the real-time temperature and a first preset temperature to pre-cool the power battery pack; in response to the real-time operating condition of the power battery pack being in the enhanced cooling stage, initiating a liquid cooling cycle and a direct cooling cycle and controlling the coolant temperature to a second preset temperature to enhance the cooling of the power battery pack; in response to the real-time operating condition of the power battery pack being in the extreme cooling stage, initiating a liquid cooling cycle and a direct cooling cycle and controlling the coolant temperature to a fourth preset temperature to extreme cool the power battery pack; wherein the second preset temperature is greater than the first preset temperature, and the fourth preset temperature is less than the first preset temperature.

[0047] Specifically, when the real-time temperature of the power battery pack is not less than the fourth temperature threshold (30℃) and less than the fifth temperature threshold (40℃), the real-time operating condition of the power battery pack is determined to be the pre-cooling stage. At this time, although the battery temperature is in a relatively suitable operating range, it shows a continuous upward trend. Long-term temperature rise will accelerate cell aging and shorten cycle life. The system starts liquid cooling circulation to achieve stable heat exchange in the whole area and controls the coolant temperature to be the difference between the real-time temperature and the first preset temperature (15℃). Low-power pre-cooling slows down the rate of temperature rise, thereby extending the battery's working time in the optimal discharge temperature range. The cooling power is adjusted according to the battery's real-time temperature, internal resistance and other parameters to avoid performance fluctuations caused by excessively rapid temperature drop. When the real-time temperature of the power battery pack is not less than the fifth temperature threshold (40℃) and less than the sixth temperature threshold (45℃), the real-time operating condition of the power battery pack is determined to be the enhanced cooling stage. At this time, the battery is close to the power limit temperature. It is difficult to suppress the temperature from rising further by relying solely on the cooling power of liquid cooling. The system starts liquid cooling circulation and direct cooling circulation, controls the coolant / refrigerant temperature to the second preset temperature (20℃), and increases the overall cooling power by using the stable heat exchange of liquid cooling and the phase change heat exchange of direct cooling to suppress the continuous rise in temperature and ensure that the battery temperature does not exceed the power limit temperature. At the same time, the cooling power is adjusted according to the real-time status of the battery to ensure that the cooling effect reaches the optimal level. When the real-time temperature of the power battery pack is not less than the sixth temperature threshold (45℃), the real-time operating condition of the power battery pack is determined to be the extreme cooling stage. At this time, the battery is close to the risk of overheating, which can easily cause cell damage and reduce battery safety. The system starts liquid cooling cycle and direct cooling cycle and uses the maximum cooling power to control the coolant / refrigerant temperature to the fourth preset temperature (10℃). The battery temperature is quickly reduced through dual-cycle high-power cooling. After the battery temperature drops back to the normal range, the cooling power is gradually reduced to avoid the sudden drop in temperature causing additional damage to battery performance.

[0048] It should be noted that all temperature thresholds (such as -15℃, 0℃, 45℃, etc.) and preset temperature values ​​(such as +15℃, 25℃, etc.) in the embodiments of this application can be adjusted according to the actual battery system and vehicle model requirements, thereby enhancing the universality and engineering flexibility of the solution.

[0049] It should be noted that the method of this embodiment can be executed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method of this embodiment, and the multiple devices will interact with each other to complete the above method.

[0050] It should be noted that the above description describes some embodiments of the present invention. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims may be performed in a different order than that shown in the above embodiments and still achieve the desired results. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0051] refer to Figure 5 The diagram below is a block diagram of an electronic device according to some embodiments of the present invention. It illustrates a more specific hardware structure of an electronic device provided in this application embodiment. The device may include: a processor 510, a memory 520, an input / output interface 530, a communication interface 540, and a bus 550. The processor 510, memory 520, input / output interface 530, and communication interface 540 are interconnected internally via the bus 550.

[0052] The processor 510 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0053] The memory 520 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 520 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 520 and is called and executed by the processor 510.

[0054] Input / output interface 530 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components in the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touch screens, microphones, various sensors, etc., and output devices may include displays, speakers, vibrators, indicator lights, etc.

[0055] The communication interface 540 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0056] Bus 550 includes a pathway for transmitting information between various components of the device, such as processor 510, memory 520, input / output interface 530, and communication interface 540.

[0057] It should be noted that although the above-described device only shows the processor 510, memory 520, input / output interface 530, communication interface 540, and bus 550, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0058] The electronic devices described above are used to implement the corresponding power battery thermal management methods in any of the foregoing embodiments, and have the beneficial effects of the corresponding power battery thermal management method embodiments, which will not be repeated here.

[0059] Based on the same concept, corresponding to the power battery thermal management method provided in any of the above embodiments, this application also provides a computer-readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the power battery thermal management method as described above is implemented.

[0060] The aforementioned computer-readable storage medium can be any available medium or data storage device that a computer can access, including but not limited to magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND flash), solid-state drives (SSDs)).

[0061] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the corresponding power battery thermal management method in any of the foregoing embodiments, and have the beneficial effects of the corresponding power battery thermal management method embodiments, which will not be repeated here.

[0062] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0063] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0064] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A dual-medium cooling plate, characterized in that, include: The upper plate (11) and the lower plate (12) are sealed together to form an internal cavity; Liquid cooling channel (121) and direct cooling channel (122) are provided in the internal cavity. A coolant inlet (123) and a coolant outlet (124) are connected to the liquid cooling channel (121). The refrigerant inlet (1251) and refrigerant outlet (1252) are connected to the direct cooling channel (122). The liquid cooling channel (121) and the direct cooling channel (122) are staggered in the plane of the dual-medium cooling plate (100).

2. The dual-medium cooling plate according to claim 1, characterized in that, The liquid cooling channel (121) includes a first inflow mainstream channel (1211), a second inflow mainstream channel (1212), and a first outflow mainstream channel (1213), with the first inflow mainstream channel (1211) and the second inflow mainstream channel (1212) located on both sides of the first outflow mainstream channel (1213); the direct cooling channel (122) includes a third inflow mainstream channel (1221), a second outflow mainstream channel (1222), and a third outflow mainstream channel (1223), with the third inflow mainstream channel (1221) located between the second outflow mainstream channel (1222) and the third outflow mainstream channel (1223); the flow direction of the mainstream channel of the liquid cooling channel (121) is opposite to that of the mainstream channel of the direct cooling channel (122).

3. The dual-medium cooling plate according to claim 2, characterized in that, Both the liquid cooling channel (121) and the direct cooling channel (122) are S-shaped channels embedded in the internal cavity.

4. The dual-medium cooling plate according to any one of claims 1 to 3, characterized in that, The cross-sectional area of ​​the direct cooling channel (122) is smaller than that of the liquid cooling channel (121).

5. The dual-medium cooling plate according to claim 1, characterized in that, The coolant inlet (123), the coolant outlet (124), and the refrigerant interface (125) are located on the upper plate (11).

6. A thermal management method for a power battery, characterized in that, Applied to a dual-medium cooling plate as described in any one of claims 1 to 5, the method comprises: Monitor the real-time temperature of the power battery pack; The real-time operating condition of the power battery pack is determined based on the real-time temperature. Based on the real-time operating conditions, the liquid thermal cycle, liquid cooling cycle, direct heating cycle, or direct cooling cycle connected to the dual-medium cooling plate are selectively activated or combined to heat or cool the power battery pack; wherein, the liquid thermal cycle and the liquid cooling cycle are connected to the liquid cooling channel through the coolant inlet and the coolant outlet, and the direct heating cycle and the direct cooling cycle are connected to the direct cooling channel through the refrigerant inlet and the refrigerant outlet.

7. The power battery thermal management method according to claim 6, characterized in that, The step of determining the real-time operating condition of the power battery pack based on the real-time temperature includes: In response to the fact that the real-time temperature of the power battery pack is not greater than the first temperature threshold, the real-time operating condition of the power battery pack is determined to be the preheating stage. In response to the real-time temperature of the power battery pack being greater than the first temperature threshold and not greater than the second temperature threshold, the real-time operating condition of the power battery pack is determined to be the rapid heating stage. In response to the real-time temperature of the power battery pack being greater than the second temperature threshold and not greater than the third temperature threshold, the real-time operating condition of the power battery pack is determined to be the heat preservation stage. Based on the real-time operating conditions, selectively activating or combining the activation of the liquid thermal cycle, liquid cooling cycle, direct heating cycle, or direct cooling cycle connected to the dual-medium cooling plate to heat or cool the power battery pack includes: In response to the real-time operating condition of the power battery pack being the preheating stage, the liquid thermal cycle is started, and the coolant temperature is controlled to be the sum of the real-time temperature and the first preset temperature, so as to preheat the power battery pack. In response to the real-time operating condition of the power battery pack being the rapid heating stage, the liquid thermal cycle is initiated, and the coolant temperature is controlled to be the sum of the real-time temperature and the second preset temperature, so as to rapidly heat the power battery pack. In response to the real-time operating condition of the power battery pack being the heat preservation stage, the liquid thermal cycle and direct thermal cycle are started, and the coolant temperature is controlled to a third preset temperature to preserve the power battery pack. Wherein, the third preset temperature is greater than the second preset temperature, and the second preset temperature is greater than the first preset temperature.

8. The power battery thermal management method according to claim 6, characterized in that, The step of determining the real-time operating condition of the power battery pack based on the real-time temperature includes: In response to the real-time temperature of the power battery pack being not less than the fourth temperature threshold and less than the fifth temperature threshold, the real-time operating condition of the power battery pack is determined to be the pre-cooling stage. In response to the real-time temperature of the power battery pack being not less than the fifth temperature threshold and less than the sixth temperature threshold, the real-time operating condition of the power battery pack is determined to be the enhanced cooling stage. In response to the real-time temperature of the power battery pack being not less than the sixth temperature threshold, the real-time operating condition of the power battery pack is determined to be the extreme cooling stage. Based on the real-time operating conditions, selectively activating or combining the activation of the liquid thermal cycle, liquid cooling cycle, direct heating cycle, or direct cooling cycle connected to the dual-medium cooling plate to heat or cool the power battery pack includes: In response to the real-time operating condition of the power battery pack being the pre-cooling stage, a liquid cooling cycle is initiated, and the coolant temperature is controlled to be the difference between the real-time temperature and the first preset temperature, so as to pre-cool the power battery pack. In response to the real-time operating condition of the power battery pack being the enhanced cooling stage, liquid cooling circulation and direct cooling circulation are started, and the coolant temperature is controlled to a second preset temperature to enhance the cooling of the power battery pack. In response to the real-time operating condition of the power battery pack being the extreme cooling stage, liquid cooling cycle and direct cooling cycle are started, and the coolant temperature is controlled to the fourth preset temperature to perform extreme cooling on the power battery pack. Wherein, the second preset temperature is greater than the first preset temperature, and the fourth preset temperature is less than the first preset temperature.

9. An electronic device, characterized in that, include: A processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the power battery thermal management method as described in any one of claims 6 to 8.

10. A computer-readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the power battery thermal management method as described in any one of claims 6 to 8.

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