Thermal management method, device, system and equipment, storage medium and program product

Abstract

The embodiment of the invention provides a thermal management method, device and system, equipment, a storage medium and a program product. According to the method, under the condition that the heat management requirement of the battery is the heat dissipation requirement, the first power of a heat management module in a heat management loop of the battery is determined based on the current of the battery, and the heat management module is controlled to operate at the first power so as to dissipate heat of the battery. According to the method, the starting power of the thermal management module is controlled according to the battery current, and the thermal management module is not required to be triggered to cool the cooling liquid after the temperature of the battery cell is increased, so that the problem that the temperature of the battery cell cannot be timely cooled in the time period when the thermal management module processes the cooling liquid is solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery thermal management, and in particular to a thermal management method, device, system, equipment, storage medium and program product. Background Art

[0002] The thermal management system of new energy vehicles can effectively ensure vehicle performance and operational safety by regulating the heat transfer of core components such as batteries and motors. It is also a key technology to extend battery life and improve the vehicle's range.

[0003] The current thermal management system mainly uses the circulation of coolant in the battery to achieve efficient heat dissipation. Specifically, the thermal management loop of the coolant is in direct contact with the battery. When the coolant flows in the thermal management loop, it can take away the heat generated by the battery through its own expansion and contraction cycle. Compared with air cooling, this liquid cooling technology has higher heat dissipation efficiency and can also provide a temperature-raising function for the battery by heating the coolant.

[0004] However, in the prior art, the start and stop of the cooling mode of the thermal management system is usually determined only based on the logical judgment of the coolant temperature and the preset temperature threshold, which makes it difficult to timely regulate the temperature of the battery cells inside the battery, and the timeliness of the battery heat dissipation is poor. Summary of the invention

[0005] The thermal management method, device, system, equipment, storage medium and program product provided in the embodiments of the present application are used to solve the problem of not being able to cool down the battery cell in time.

[0006] In a first aspect, an embodiment of the present application provides a thermal management method, comprising:

[0007] When the thermal management requirement of the battery is a heat dissipation requirement, determining a first power of a thermal management module in a thermal management loop of the battery based on the current of the battery;

[0008] The thermal management module is controlled to operate at the first power to dissipate heat from the battery.

[0009] In a possible implementation manner, determining a first power of a thermal management module in a thermal management loop of the battery based on the current of the battery includes:

[0010] Acquire a ratio of the current of the battery to the maximum current of the battery;

[0011] The first power is determined based on a product of the ratio and a maximum power of the thermal management module.

[0012] In a possible implementation manner, controlling the thermal management module to operate at the first power includes:

[0013] Control the thermal management module to operate at the first power, and control the water pump in the thermal management loop to operate at the initial power.

[0014] In a possible implementation manner, after controlling the thermal management module to operate at the first power, the method further includes:

[0015] If the duration for which the battery satisfies the first condition is greater than or equal to a preset duration, control the thermal management module to operate at a second power, and control the water pump in the thermal management loop to operate at a third power; the second power is greater than the first power and less than or equal to the maximum power of the thermal management module, and the third power is greater than the initial power of the water pump and less than or equal to the maximum power of the water pump;

[0016] The first condition includes: the current of the battery is greater than a current threshold, and the temperature difference of the coolant at the inlet and outlet of the battery is within a preset temperature difference range.

[0017] In a possible implementation manner, the method further includes:

[0018] Output a prompt message indicating that there is a water circuit fault in the battery.

[0019] In a possible implementation manner, after controlling the thermal management module to operate at the first power, the method further includes:

[0020] If the duration for which the battery satisfies the first condition is less than the preset duration, or the battery does not satisfy the first condition, determine the fourth power of the water pump based on the coolant temperature at the outlet of the battery;

[0021] Control the water pump to operate at the fourth power.

[0022] In a possible implementation manner, determining the fourth power of the water pump based on the coolant temperature at the outlet of the battery includes:

[0023] Based on the coolant temperature at the outlet of the battery and the mapping relationship between the coolant temperature and the power gear, determine the target power gear of the water pump; different power gears correspond to different powers, and the power corresponding to the target power gear is the fourth power;

[0024] Controlling the water pump to operate at the fourth power includes:

[0025] Control the water pump to operate at the target power gear.

[0026] In a possible implementation manner, the method further includes:

[0027] If the change in the current of the battery exceeds the range of the current change, adjust the power of the thermal management module based on the current of the battery.

[0028] In a possible implementation, the method further includes:

[0029] If the change in the current of the battery is within the range of the current change, adjust the power of the thermal management module based on the temperature change at the water inlet of the battery.

[0030] In a possible implementation, the adjusting the power of the thermal management module based on the temperature change at the water inlet of the battery includes:

[0031] If the change in the temperature at the water inlet of the battery is less than the temperature change threshold, increase the power of the thermal management module;

[0032] If the change in the temperature at the water inlet of the battery is greater than or equal to the temperature change threshold, decrease the power of the thermal management module.

[0033] In a possible implementation, the method further includes:

[0034] When the thermal management requirement of the battery is a heating requirement and the temperature at the water inlet is less than the temperature threshold, control the thermal management module to operate at a fifth power to heat the battery; the fifth power is less than or equal to the maximum power of the thermal management module.

[0035] In a possible implementation, the method further includes:

[0036] When the thermal management requirement of the battery is a heating requirement and the temperature at the water inlet is greater than or equal to the temperature threshold, determine the sixth power of the water pump based on the coolant temperature at the water outlet of the battery;

[0037] Control the water pump to operate at the sixth power to heat the battery.

[0038] In a possible implementation, the method further includes:

[0039] Adjust the power of the thermal management module based on the change in the coolant temperature at the water outlet of the battery.

[0040] In a possible implementation, the adjusting the power of the thermal management module based on the change in the coolant temperature at the water outlet of the battery includes:

[0041] If the change in the coolant temperature exceeds the range of the temperature change, increase the power of the thermal management module;

[0042] If the change amount of the coolant temperature is within the temperature change range, the power of the thermal management module is reduced.

[0043] In a second aspect, an embodiment of the present application provides a thermal management device, including:

[0044] A determination module, configured to determine a first power of a thermal management module in a thermal management circuit of the battery based on the current of the battery when the thermal management requirement of the battery is a heat dissipation requirement;

[0045] A control module, configured to control the thermal management module to operate at the first power to dissipate heat from the battery.

[0046] In a third aspect, an embodiment of the present application provides an electronic device, including: a memory, a processor;

[0047] The memory stores computer-executable instructions;

[0048] The processor executes the computer-executable instructions stored in the memory, so that the processor executes any possible implementation manner of the first aspect above.

[0049] In a fourth aspect, an embodiment of the present application provides a thermal management system, the thermal management system includes: a control module, a thermal management module, a water pump, a water tank;

[0050] One end of the thermal management module is connected to one end of the water pump and the water outlet of the water tank, the other end of the water pump is connected to the water inlet of the battery, and the water outlet of the battery is connected to the other end of the thermal management module, forming the thermal management circuit of the battery;

[0051] The water tank is configured to provide coolant for the thermal management circuit;

[0052] The thermal management module is configured to heat or cool the coolant in the thermal management circuit;

[0053] The water pump is configured to provide a flow power for the coolant in the thermal management circuit;

[0054] The control module is communicatively connected to the thermal management module and is configured to execute any possible implementation manner of the first aspect above.

[0055] In a fifth aspect, an embodiment of the present application provides an electric energy device, the electric energy device includes a battery, and the thermal management system as described in the fourth aspect.

[0056] In a sixth aspect, an embodiment of the present application provides an electric energy device, the electric energy device includes a battery, the electronic device as described in the third aspect, and a thermal management system;

[0057] The thermal management system includes: a thermal management module, a water pump, a first temperature sensor, a second temperature sensor, and a water tank; one end of the thermal management module is connected to one end of the water pump and the water outlet of the water tank, the other end of the water pump is connected to the water inlet of the battery, and the water outlet of the battery is connected to the other end of the thermal management module, forming the thermal management loop of the battery;

[0058] The water tank is used to provide coolant for the thermal management loop;

[0059] The thermal management module is used to heat or cool the coolant in the thermal management loop;

[0060] The water pump is used to provide motive power for the flow of the coolant in the thermal management loop.

[0061] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement any possible implementation manner of the first aspect above.

[0062] In an eighth aspect, an embodiment of the present application provides a computer program product, including a computer program, and when the computer program is executed by a processor, it implements any possible implementation manner of the first aspect above.

[0063] For the thermal management method, device, system, equipment, storage medium and program product provided by the embodiments of the present application, since the heat generated by the battery internal resistance is proportional to the current, by monitoring the current of the battery, the heat generation amount of the battery can be determined in advance, providing a basis for cooling power adjustment. Therefore, the power of the thermal management module can be determined by the battery current, and the battery can be cooled in advance according to the determined power, solving the lag of the existing thermal management system in cooling the battery, and realizing efficient and active battery temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0065] Figure 1 It is a schematic structural diagram of a thermal management system provided by the present application;

[0066] Figure 2 It is a schematic flow chart of a thermal management method provided by the present application Figure 1 ;

[0067] Figure 3 It is a schematic flow chart of a thermal management method proposed by the present application Figure 2 ;

[0068] Figure 4 Schematic flow chart of a thermal management method proposed in this application Figure 3 ;

[0069] Figure 5 Schematic structural diagram of a thermal management device provided in this application;

[0070] Figure 6 Schematic structural diagram of an electronic device provided in this application.

[0071] Through the above-mentioned drawings, specific embodiments of this application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Specific embodiments

[0072] Here, exemplary embodiments will be described in detail, and their examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are merely examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0073] The thermal management system of new energy vehicles can regulate the heat flow of key components such as batteries, motors, and electric control systems, which is directly related to the power output stability, energy efficiency performance, and long-term operation reliability of the vehicle. Continuous high or low temperature environments will accelerate the attenuation of battery capacity, while the thermal management system can extend the battery cycle life by maintaining the battery operating temperature within a suitable temperature range. At the same time, efficient thermal management technology can reduce energy loss and improve the overall vehicle driving range.

[0074] The current liquid-cooled thermal management system adopts an indirect contact heat exchange structure, and its thermal management circuit is usually closely attached to the surface of battery cells or modules. When the coolant circulates in the circuit, heat exchange can be achieved:

[0075] When the battery generates heat, the coolant absorbs heat and undergoes thermal expansion, and the flow rate increases to improve the heat dissipation efficiency; when the battery needs to be heated, it can be switched to the heating mode. After the coolant is preheated, the contact pressure with the battery is increased through the contraction effect, strengthening the heat conduction efficiency.

[0076] However, the control logic of existing thermal management systems is usually a switching control based on a single threshold of the coolant temperature output by the battery. In the case of cooling the battery, it is difficult for this control method to capture the dynamic temperature changes inside the battery. Due to the temperature difference between the battery cells inside the battery and the battery surface, during the period when the thermal management system has not reached the preset temperature threshold and has not been started, the heat generated by the battery cells will continue to accumulate. This lag in control response is likely to accelerate the aging process of the battery and affect its lifespan.

[0077] There is a positive correlation between the current of the battery and the heat generation of the battery. When current passes through the battery, electrochemical reactions occur inside the battery. The greater the current, the faster the rate of electrochemical reactions, and the more heat is generated per unit time, resulting in an increase in the battery temperature.

[0078] To address the above problems, the thermal management method provided in this application accurately determines the current temperature of the battery by analyzing current data through real-time monitoring of the battery current, and then determines the activation power of the thermal management module based on the battery current of different magnitudes. There is no need to wait until the actual temperature of the battery cells rises to trigger the cooling process. It can actively adjust the refrigeration power before the risk of battery thermal runaway forms, which not only realizes timely and accurate cooling operation based on the actual temperature of the battery, but also effectively solves the problem of cooling lag caused by heat conduction delay in the prior art, keeping the battery temperature within a controllable range.

[0079] Figure 1 The following is a schematic structural diagram of a thermal management system provided in this application. As Figure 1 shown, the thermal management system includes: a thermal management module 2, a water pump 3, a battery 5, and a water tank 7.

[0080] This thermal management system is under the control of a control module 1. The control module 1 can be a dedicated thermal management controller or other controllers in the electrical energy device, such as a power controller. The control module 1 is electrically connected to each component of the thermal management system to construct a control network. The electrical connection can be, for example: hard-wired connection using a wire harness, or connection using a controller area network bus. This application does not make any limitations on this.

[0081] After the control module 1 is electrically connected to the devices in the thermal management system, monitoring and control functions can be realized. Specifically, the control module 1 can perform heat dissipation control based on the current of the battery 5. Optionally, the control module 1 can further perform heat dissipation control by combining other data, such as the temperature of the coolant at the inlet and outlet of the battery. Optionally, the control module 1 can also perform heating control on the battery and monitor the liquid level of the water tank 7, etc., and no limitations are made on this.

[0082] In a thermal management system, various components are physically connected to form a circulation path for the coolant, which is used to achieve the circulation of the coolant. The physical connection can be, for example, through pipes. The thermal management module 2 has cooling and heating functions and can perform cooling and heating treatments on the coolant. For example, the thermal management module can include: a cooling plate, a cooling pump, a radiator, a heater, and a heat pump system. Different devices cooperate according to the battery thermal management requirements. During cooling, the cooling plate, cooling pump, and radiator are responsible for circulating and cooling the coolant, and during heating, the heater and heat pump system heat the relevant medium.

[0083] The water pump 3 is the power source in the thermal management system and can drive the coolant to circulate in the thermal management loop to achieve heat transfer and dissipation. The battery 5 is the energy storage component of the electrical energy device and generates a large amount of heat during the charging and discharging processes, and a thermal management system is required to control the temperature. The water tank 7 can replenish the coolant for the thermal management system, exhaust air, and release the pressure difference change in the closed-loop system.

[0084] During actual use, the water pump 3 operates continuously to extract the coolant that has completed the heating or cooling treatment in the thermal management module 2, and then the coolant is pumped into the coolant flow loop of the battery 5. The coolant exchanges heat with the battery 5 in the loop, absorbs the heat generated by the battery 5, or releases heat to the battery 5 to play a heating role.

[0085] After the heat exchange is completed, the coolant that has absorbed or released heat flows out of the coolant flow loop of the battery 5 and returns to the thermal management module 2 to complete one cooling or heating cycle of the thermal management system.

[0086] This solution can be applied to the battery thermal management system of electrical energy devices. The execution entity of this application can be the above-mentioned dedicated thermal management controller or other controllers in the electrical energy device, and this application does not make any limitations in this regard.

[0087] This application provides an electrical energy device, and the electrical energy device includes the battery system mentioned above. The electrical energy device mentioned here can be, for example, a vehicle, such as a car, a ship, an aircraft, etc., or an energy storage cabinet, an energy storage battery, etc., or other electrical equipment using high voltage, such as an air conditioner, etc., and this application does not make any limitations in this regard.

[0088] The technical solution of this application and how this technical solution solves the above technical problems will be described in detail below with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will be described below in conjunction with the drawings.

[0089] Figure 2 It is a schematic flow chart of a thermal management method provided by this application Figure 1 asFigure 2 As shown, the method includes:

[0090] S201. When the thermal management requirement of the battery is a heat dissipation requirement, based on the current of the battery, determine the first power of the thermal management module in the thermal management circuit of the battery.

[0091] Among them, the thermal management requirement can be judged by the battery management system comparing the set working temperature range of the battery and the current temperature of the battery. That is, when the current temperature of the battery is higher than the working temperature range of the battery, the battery management system can send a heat dissipation request to the control module so that the control module can know that the thermal management requirement of the battery is a heat dissipation requirement.

[0092] The battery management system can also provide the control module with the current temperature of the battery. The control module determines whether heat dissipation is required for the battery by comparing the current temperature of the battery with the pre-stored normal working temperature range of the battery. The source of the thermal management requirement in this application is not limited.

[0093] The heat dissipation requirement is used to indicate that the internal temperature of the battery has exceeded its suitable working temperature range at this time, and heat dissipation treatment needs to be performed on the battery.

[0094] After receiving the heat dissipation requirement, the control module can determine the first power of the thermal management module according to the battery current. For example, the first power of the thermal management module can be determined through a pre-established current-power mapping relationship. This mapping relationship can be formed, for example, by a high-precision device applying currents with different intensities and change rates to the battery, simulating various working conditions, recording the power values of the stable operation of the thermal management module under each group of currents, forming a data set containing multi-dimensional information such as current and power, and then cleaning and integrating the data set. When the control module obtains the battery current, it can find the first power of the thermal management module corresponding to the battery current according to this mapping relationship.

[0095] It should be noted that the battery current mentioned in this application can be the battery input current or the battery output current. For example, in the case of charging an electrical energy device, the battery current is the battery input current, and in the case of operating an electrical energy device, the battery current is the battery output current.

[0096] The control module can also input the obtained battery current into the corresponding power determination model to obtain the first power. The model can be a model constructed based on machine learning or deep learning algorithms. The algorithm of the model can learn the correlation between the battery current and the power of the thermal management module from a large amount of historical data. When the control module inputs the current battery current into the model, the model can output the first power of the thermal management module.

[0097] The control module can also determine the first power based on the battery current and the maximum output current of the battery.

[0098] It can be understood that the maximum output current of the battery is the maximum current value that the battery can safely output under specific conditions, and it is related to factors such as the battery capacity, internal resistance, and temperature. By calculating the ratio of the current battery current to the maximum output current, the current load level of the battery can be understood. The load level of the battery refers to the relative relationship between the electric power, current magnitude, and continuous output ability that the battery bears under a specific working state and its own performance indicators.

[0099] When the load is high, the internal chemical reaction of the battery intensifies, and the heat generation rate of the battery increases. At this time, a thermal management system is needed to deal with it; and the operating power of the thermal management module directly determines its heat dissipation ability. A higher operating power can take away the excess heat generated by the battery more quickly and efficiently. Therefore, the control module can correspondingly increase the power output of the thermal management module according to this situation, so that the battery temperature can be within a reasonable range. On the contrary, when the load is low, the heat generation rate of the battery slows down, and the demand for heat dissipation decreases. The control module can appropriately reduce the operating power of the thermal management module to achieve optimal allocation and reasonable conservation of energy.

[0100] For example, the first power can be determined based on the product of the ratio of the battery current to the maximum output current of the battery and the maximum power of the thermal management module.

[0101] The first power can be the product obtained by multiplying the ratio of the battery current to the maximum output current of the battery by the rated power of the thermal management module, or it can be appropriately increased or decreased based on the product value calculated above. The specific increase or decrease method can be comprehensively determined according to factors such as the actual efficiency of thermal management and the energy-saving requirements of the electrical energy device.

[0102] It can be understood that the maximum power of the thermal management module determines the maximum energy value that the thermal management module can handle during the cooling process. Through the above multiplication operation of the current ratio and the maximum power of the thermal management module, the first power can be obtained. The determination of the first power can make the battery work within the safe temperature threshold, and at the same time optimize the energy efficiency ratio of the thermal management system through the on-demand allocation of power resources. At the same time, this calculation method is not affected by the operating conditions of the electrical energy device and is applicable to electrical energy devices operating under any working conditions.

[0103] S202. Control the thermal management module to operate at the first power to dissipate heat from the battery.

[0104] It can be understood that the thermal management module operates at the first power, mainly to cool the coolant in the thermal management loop to ensure that the coolant flowing to the battery can cool the battery. At the same time, the water pump can be turned on. The water pump can drive the coolant to circulate to achieve battery heat dissipation. The water pump is linked with the thermal management module to ensure that the coolant flow rate and velocity match the power demand of the thermal management module.

[0105] The setting method of the water pump power affects the heat dissipation efficiency and energy consumption, and it is necessary to balance performance and economy. The starting power of the water pump can be, for example, a preset fixed initial power, or its power can be dynamically determined based on the current. The determination method can be, for example, the same as the method for determining the power of the aforementioned thermal management module, which will not be elaborated here. The preset fixed initial power does not require calculation and can quickly start heat dissipation. The dynamic power based on the current ratio is matched with the battery load in real time, and precise control can be achieved.

[0106] The thermal management method provided by the embodiments of the present application, when the thermal management requirement is a heat dissipation requirement, dynamically adjusts the starting power of the thermal management module through the battery current, realizing real-time and precise control of the battery temperature.

[0107] Since the change in the coolant temperature lags behind the actual change in the cell temperature, during the period when the thermal management module cools the coolant, the cell temperature may have risen rapidly due to the heat generated by the continuous operation of the battery, but the thermal management system fails to promptly detect and effectively control the cell temperature, resulting in the situation that the cell temperature cannot be controlled in time. Since the battery current is closely related to the battery heat generation rate, when the battery current changes, it can quickly reflect the change in the battery heat generation situation. The thermal management system can capture this current change in real time and, based on this, promptly adjust the starting power of the thermal management module to respond to the battery's heat dissipation requirement in advance.

[0108] At the same time, the real-time response to the current change enables the thermal management system to effectively predict the future temperature change of the battery according to the law and trend of the current change. For example, when the current continues to increase, it can be predicted that the battery heat generation will further increase, and then the heat dissipation capacity of the thermal management module can be enhanced in advance to actively intervene in the battery temperature trend and prevent the battery temperature from developing in the too-high direction, thereby achieving more timely and precise control of the battery temperature.

[0109] During the process of the thermal management system dissipating heat from the battery, that is, after controlling the thermal management module to operate at the first power, the first power and the power of the water pump can also be dynamically adjusted according to the operating state of the battery.

[0110] For example, the power of the thermal management module and the water pump can be updated and adjusted according to the magnitude of the battery current value and the temperatures of the inlet and outlet of the battery.

[0111] Such asFigure 1 As shown, the thermal management system in the embodiment of the present application further includes a first temperature sensor 4 and a second temperature sensor 6. The thermal management system can adopt two different temperature feedback methods. The first temperature sensor 4 can be set at the inlet water circuit of the battery, and the second temperature sensor 6 can be set at the outlet water circuit of the battery, so that it can directly measure the coolant temperature and transmit the real-time measured temperature data to the control module of the thermal management system. Or the temperature sensor can be set on the battery side, and the coolant temperatures corresponding to both sides are collected by the battery side and then reported to the control module. The present application does not limit this.

[0112] It can be understood that the heating power of the battery is proportional to the square of the current, and the current value directly reflects the real-time working intensity of the battery. Since the operating mode or usage mode of the electrical energy device may change, it is necessary to dynamically adjust the cooling power by real-time monitoring the current to match the actual heat demand. The electrical energy device can be, for example, a vehicle. Due to factors such as the user's driving behavior and environmental temperature fluctuations, the operating conditions of the vehicle may change continuously, and the battery heating situation will also change accordingly. Therefore, it is necessary to real-time monitor the current to dynamically adjust the cooling power. At the same time, the temperature difference between the inlet and outlet of the coolant directly reflects the actual heat dissipation efficiency of the battery. If the outlet temperature is higher than expected, it may be caused by insufficient coolant flow rate or performance degradation of the thermal management module, and it is necessary to increase the pump speed or thermal management power to enhance the battery heat dissipation.

[0113] Optionally, if the duration for which the battery satisfies the first condition is greater than or equal to the preset duration, then control the thermal management module to operate at the second power, and control the water pump in the thermal management circuit to operate at the third power; the second power is greater than the first power and less than or equal to the maximum power of the thermal management module, and the third power is greater than the initial power of the water pump and less than or equal to the maximum power of the water pump.

[0114] The first condition includes: the current of the battery is greater than the current threshold, and the coolant temperature difference between the inlet and outlet of the battery is within the preset temperature difference range. The current threshold can be, for example, 80, and the preset temperature difference range can be, for example, (-1, 1), which can be specifically set according to actual requirements.

[0115] It can be understood that when the battery discharges at a high rate, the internal heat generation rate of the battery increases sharply. The normal waterway design should quickly export the heat through the efficient circulation of the coolant. At this time, there should be a significant temperature difference between the inlet and outlet. If it is detected that the coolant temperature difference between the inlet and outlet is within the preset temperature difference range, it means that the coolant has not effectively taken away the heat generated by the battery, and there may be faults such as waterway blockage.

[0116] When it is determined that there is a fault in the water circuit, the control module can output a prompt message that there is a water circuit fault in the battery, so that the staff can promptly notify the power equipment and perform maintenance on it, reducing the risk of using the power equipment. At the same time, the control module can also increase the power of the water pump, so that the water pump can temporarily break through the local blockage (such as alleviating minor blockages through high-pressure flushing), and by increasing the coolant flow rate, enhance the convective heat transfer efficiency, and improve its cooling capacity under faults such as water circuit blockage; on the other hand, by increasing the power of the thermal management module (such as increasing the opening of the liquid cooling plate and enabling additional cooling fans), the temperature of the coolant can be further reduced, the convective heat transfer efficiency can be enhanced, and the risk of battery temperature runaway can be reduced.

[0117] Among them, when there is a fault in the water circuit, the power of the thermal management module and the water pump is increased immediately. The power of the thermal management module and the water pump can be directly increased to the maximum power to quickly dissipate the heat of the battery. Alternatively, on the basis of the first power and the initial power of the water pump, the power can be gradually increased according to the battery current and the temperature difference of the coolant at the inlet and outlet, thereby reducing the impact damage of full-power operation on the components of the thermal management system.

[0118] Optionally, if the duration for which the battery meets the first condition is less than a preset duration, or the battery does not meet the first condition, the fourth power of the water pump is determined based on the coolant temperature at the battery outlet; and the water pump is controlled to operate at the fourth power.

[0119] It is understandable that if the duration for which the battery does not meet the first condition is less than the preset duration, it means that there may be local overtemperature inside the battery, or that the electrical equipment is using high power instantaneously. At this time, the thermal management system may not respond to this instantaneous heat load, and the instantaneous heat has not yet been transferred to the coolant circuit, resulting in the inlet and outlet temperature difference not being reflected.

[0120] It is understandable that when the battery does not meet the first condition, it means that there is no obvious abnormality in the battery water circuit, and the heat generation and cooling of the battery are in dynamic balance.

[0121] In the above two cases, the water pump power can be adjusted by the coolant temperature at the battery outlet to achieve a match between heat dissipation efficiency and energy consumption. For example, if the outlet temperature has begun to rise due to transient high current (even if the inlet and outlet temperature difference is small), increasing the water pump power can accelerate the coolant circulation and directly remove the heat from the battery surface.

[0122] When adjusting the power of the water pump, the power of the water pump can be determined according to the method for determining the first power as described above, or the gear of the water pump can be determined according to the pre-set mapping relationship between the temperature of the water pump outlet and the gear. This mapping relationship can be obtained by changing the heat generation of the battery, recording the power values of the water pump that can keep the battery at an appropriate working temperature under different heat dissipation requirements, and then obtaining the corresponding law between the temperature of the battery outlet and the gear of the water pump through data analysis. During actual use, the gear of the water pump can be determined by monitoring the coolant temperature at the battery outlet, and then the power of the water pump can be adjusted.

[0123] In this implementation manner, the power of the thermal management module can also be adjusted according to the change amount of the battery current.

[0124] It can be understood that during the use of the electrical energy device, the battery current may change with the working mode. For example, the electrical energy device can be a new energy vehicle. During the driving of the new energy vehicle, the battery continuously outputs current to drive the vehicle, and the current will fluctuate dynamically with the working conditions (such as a sharp increase in current when accelerating and overtaking, and a sharp decrease in current when coasting downhill). This current change directly determines the heating power of the battery, that is, the larger the current, the more significant the superposition effect of the internal resistance Joule heat and the heat generated by the electrochemical side reaction. Therefore, the power of the thermal management module can be adjusted according to the change amount of the battery current. Therefore, by tracking the current fluctuation in real time and adjusting the thermal management power, the battery safety margin and the cruising economy can be taken into account, and the optimal solution of the thermal efficiency and the power consumption can be achieved.

[0125] If the change amount of the battery current is large, that is, the use of the electrical energy device causes obvious fluctuations in the battery current. If the change amount of the battery current is positive, that is, the battery current increases, the corresponding heat generation rate of the battery may rise sharply. At this time, the thermal management module needs to increase the power to enhance the cooling capacity of the coolant. If the change amount of the battery current is negative, that is, the battery current decreases, the corresponding heat generation rate of the battery may decrease. At this time, the power of the thermal management module can be reduced to reduce unnecessary energy waste.

[0126] The power adjustment of the thermal management module can be determined according to the product of the ratio of the battery current to the maximum output current of the battery and the maximum power of the thermal management module, or the power of the thermal management module can be adjusted step by step according to the change of the battery current. For example, when the battery current increases, the power of the thermal management module is increased; when the battery current decreases, the power of the thermal management module is decreased.

[0127] If the change amount of the battery current is small, at this time, the power of the water pump can be adjusted according to the coolant temperature at the battery outlet.

[0128] It should be understood that the change in the battery current is small, that is, the battery operates relatively stably, and the heat generation power of the battery is also relatively stable. The coolant circulates in the thermal management loop to take away the heat generated by the battery. The coolant temperature at the battery outlet can directly reflect the heat dissipation situation of the battery and the cooling effect of the current thermal management module.

[0129] Adjusting the power of the thermal management module can make the battery operate in a suitable working temperature range as much as possible, keep the performance indicators of the battery stable, and at the same time, flexibly adjusting the power of the thermal management module according to the actual thermal demand of the battery can avoid unnecessary energy waste.

[0130] The above content describes the thermal management method when the thermal management requirement is a heat dissipation requirement. In some embodiments, the thermal management requirement can also be a heating requirement.

[0131] Optionally, when the thermal management requirement of the battery is a heating requirement and the temperature at the inlet is lower than the temperature threshold, the thermal management module is controlled to operate at a fifth power to heat the battery.

[0132] When the current temperature of the battery is lower than the set battery operating temperature range, the battery management system can send a heating requirement to the control module. The heating requirement can also be obtained by the control module through monitoring the battery temperature and comparing it with a preset temperature threshold. The source of the thermal management requirement in this application is not limited.

[0133] It can be understood that when the real-time monitored temperature at the inlet is lower than the preset temperature threshold, it means that the external environment or the current state of the thermal management system cannot provide enough heat for the battery to maintain its normal operating temperature range. At this time, it is necessary to control the thermal management module to operate at a fifth power. The fifth power can be the maximum power of the thermal management module or a power smaller than the maximum power. Operating the thermal management module at a larger power means that the thermal management module can fully mobilize the heating capacity of the internal heating elements (such as heating films, heaters, etc.) to quickly increase the coolant temperature.

[0134] The coolant continuously absorbs the heat generated by the heating module during the circulation process, and then is transported to the coolant flow loop of the battery. By contacting the battery surface, the heat is efficiently transferred to the battery, thereby quickly increasing the battery temperature and ensuring that the battery can still maintain good chemical reaction activity, internal resistance stability, and charge and discharge efficiency in a low-temperature environment.

[0135] Optionally, when the thermal management requirement of the battery is a heating requirement and the temperature at the inlet is greater than or equal to the temperature threshold, then based on the coolant temperature at the battery outlet, the sixth power of the water pump is determined; the water pump is controlled to operate at the sixth power to heat the battery.

[0136] It can be understood that when the temperature at the water inlet is greater than or equal to the preset temperature threshold, it indicates that an external heat source (such as engine waste heat, relatively high ambient temperature) or the preheating process of the thermal management system itself has given the coolant a certain initial temperature basis. The power of the thermal management module can be adjusted according to the energy-saving requirements of the electrical equipment to maintain the current coolant temperature.

[0137] The coolant temperature at the battery water outlet can directly reflect the actual temperature state of the battery during the heating process and the current heat exchange efficiency. By obtaining this temperature data in real time through a temperature sensor, the control module can determine the pump power value that meets the battery heating requirements and avoids overheating or insufficient heating, that is, the sixth power.

[0138] Controlling the pump to operate at the sixth power can adjust the circulation flow rate of the coolant, so that a stable heat cycle is formed between the battery interior and the thermal management module. This not only ensures that the battery can continuously receive an appropriate amount of heat input to maintain an appropriate operating temperature, but also avoids problems such as excessive heat exchange due to too large a flow rate causing the battery temperature to be too high, or too small a flow rate causing uneven heating and local low temperature, thereby realizing the control of the battery heating process.

[0139] In this implementation manner, the power of the thermal management module can also be adjusted according to the change amount of the coolant temperature at the battery water outlet.

[0140] It can be understood that during the battery heating process, the coolant temperature at the battery water outlet can change dynamically with various factors such as the heating power of the thermal management module, the circulation flow rate of the pump, and the heat absorption capacity of the battery itself. By continuously monitoring the change amount of the coolant temperature at the battery water outlet (that is, the rising or falling amplitude of the temperature per unit time), the control module can perceive the dynamic characteristics of the battery heating process in real time.

[0141] For example, if the change amount of the temperature is large, it indicates that there may be a mismatch between the current heating power of the thermal management module and the heat absorption demand of the battery. It may be that the heating power is too high, causing the battery temperature to rise too fast, with a risk of overheating; or the heating power is too low to meet the battery's rapid temperature rise demand. Based on this, the control module can automatically adjust the power of the thermal management module according to the preset control strategy.

[0142] The thermal management method provided by the embodiments of the present application, when the thermal management requirement is a heating requirement, determines whether it is necessary to heat the coolant through the thermal management module by judging the temperature at the battery water inlet and the temperature threshold. If heating is required, the power of the thermal management module is increased to strengthen the heating effect of the coolant, so that the heated coolant quickly circulates to the battery, accurately raising the battery temperature, ensuring its operation under suitable working conditions, reducing the negative impact of low temperature on the battery charge and discharge efficiency, internal resistance, and capacity, and improving the battery performance and durability.

[0143] The following uses a specific embodiment to illustrate the thermal management method. In the following example, the execution entity of the present application can be a controller dedicated to the thermal management system or the vehicle domain controller of a new energy vehicle.

[0144] Exemplarily, the thermal management requirement can be obtained by the battery management system of the battery comparing the appropriate operating temperature of the battery with the current temperature.

[0145] The controller first communicates with the battery to obtain the thermal management requirement sent by the battery. Figure 3 Flow schematic of a thermal management method proposed for this application Figure 2 , as Figure 3 shown, when the received thermal management requirement is a heat dissipation requirement, the specific processes executed by the controller include:

[0146] S301. Obtain the ratio of the current of the battery to the maximum current of the battery, and determine the first power based on the product of the ratio and the maximum power of the thermal management module.

[0147] It can be understood that the current of the battery represents the load condition of the battery at the current moment. By calculating the ratio of the real-time collected battery current to the maximum current, a value reflecting the relative degree of the current load of the battery can be obtained. The thermal management module itself has a maximum power limit, which is determined by its hardware design and performance parameters. Multiplying the current ratio by the maximum power of the thermal management module, the result obtained is the first power. This first power comprehensively considers the current load degree of the battery and the capabilities of the thermal management module, and can meet the power tolerance range of the thermal management module while meeting the heat dissipation requirements of the battery, providing a reasonable power benchmark for subsequent thermal management operations.

[0148] S302. Control the thermal management module to operate at the first power, and control the water pump in the thermal management loop to operate at the initial power.

[0149] It can be understood that after determining the first power, the controller can send a control instruction to the thermal management module to make it start operating at the first power. The thermal management module can adjust the operating state of the refrigeration element inside it according to the power instruction to generate cold quantity of corresponding intensity, so as to provide appropriate cooling effect for the battery. At the same time, the controller can also control the water pump in the thermal management loop to start operating at the initial power. The initial power of the water pump is usually set based on the basic heat dissipation requirement and flow requirement. By operating at the initial power, the water pump can push the coolant to start circulating in the thermal management loop, transfer the cold quantity generated by the thermal management module to the surrounding of the battery, and establish a preliminary heat exchange environment.

[0150] S303. Detect the battery current and the temperatures at the inlet and outlet of the battery.

[0151] It can be understood that in order to monitor the working state of the battery and the effect of thermal management in real time, the controller can continuously detect the battery current. The change in the battery current directly reflects the load condition of the battery under different working conditions. By monitoring the current change in real time, the controller can timely understand whether the heat dissipation requirement of the battery has changed.

[0152] In addition, the controller can also obtain the temperatures at the inlet and outlet of the battery respectively. The temperature at the battery inlet represents the initial temperature of the coolant entering the battery heat exchange area, while the temperature at the battery outlet reflects the temperature of the coolant after heat exchange with the battery. These two temperature data are key indicators for evaluating the heat dissipation effect of the thermal management system. By comparing the temperatures at the inlet and outlet, the actual temperature difference between the battery and the coolant can be calculated, and then it can be judged whether the thermal management circuit effectively takes away the heat generated by the battery and whether the battery operates within a suitable temperature range.

[0153] S304. Determine whether the duration for which the battery satisfies the first condition is greater than or equal to a preset duration. If so, execute step S305; if not, execute step S306.

[0154] It can be understood that the first condition involves the situation where the battery current is greater than the current threshold and the coolant temperature difference between the inlet and outlet of the battery is within a preset temperature difference range. The current threshold and the preset temperature difference range are set based on the safe operating temperature range of the battery and the design goal of the thermal management system. If the duration for which the battery satisfies the first condition is greater than or equal to the preset duration, it means that there may be relatively serious thermal management problems with the battery and timely treatment is required; if the first condition is not satisfied or the duration is less than the preset duration, it indicates that although the battery state has fluctuated to a certain extent, it is still within an acceptable range and fine adjustment can be made to maintain the battery operating within a suitable temperature range.

[0155] S305. Control the thermal management module to operate at a second power, and control the water pump in the thermal management circuit to operate at a third power, and output a prompt message indicating that there is a water circuit fault in the battery.

[0156] It can be understood that if the first situation is satisfied, it means that there is a problem with the thermal management system. The cooling capacity can be increased by increasing the power of the thermal management module, and the coolant flow rate and velocity can be increased by increasing the power of the water pump to quickly reduce the battery temperature.

[0157] At the same time, the information display system or alarm device of the electric energy equipment can also output a prompt message indicating that there is a water circuit failure in the battery. This prompt message can promptly inform technicians that there may be water circuit problems in the battery thermal management system, such as water pump failure, water circuit blockage, coolant leakage, etc., so that they can take corresponding maintenance measures as soon as possible to ensure the safe use of the electric energy equipment.

[0158] S306: Determine a target power gear of the water pump based on the coolant temperature at the battery water outlet and the mapping relationship between the coolant temperature and the power gear, and control the water pump to operate at the target power gear.

[0159] Among them, different power gears correspond to different powers, and the power corresponding to the target power gear is the fourth power.

[0160] It is understandable that when the duration of the battery meeting the first condition is less than the preset duration, the thermal management system can enter the detailed power regulation stage. The coolant temperature at the battery outlet can be paid attention to, because this temperature reflects the actual temperature of the coolant after heat exchange with the battery, which is an important basis for measuring the heat dissipation effect of the battery.

[0161] The mapping relationship between the coolant temperature and the water pump power gear can be set and stored. This mapping relationship can be obtained through a large number of experiments and simulation calculations. Different coolant temperature ranges correspond to different water pump power gears. The higher the temperature, the higher the corresponding water pump power gear is usually, to ensure that the coolant can circulate at a faster speed and take away more heat. For example, the water pump can be divided into two gears according to the water pump power, and it can be set that when the coolant temperature is less than or equal to 46°C, the water pump is in the first gear, and when the coolant temperature is greater than 46°C, the water pump is in the second gear.

[0162] The target power gear of the water pump can be determined by searching and matching the coolant temperature at the battery outlet detected in real time in the mapping relationship. Once the target power gear is determined, the controller can send a control instruction to the water pump to adjust it to run at that power gear. This dynamic power adjustment method based on real-time temperature can more accurately control the temperature of the battery, while meeting the battery's heat dissipation requirements, reducing energy consumption as much as possible, and improving the efficiency and reliability of the entire thermal management system.

[0163] S307, determine whether the battery current variation exceeds the current variation range, if so, execute step S308, if not, execute step S309.

[0164] It is understandable that the dynamic change of the battery current is an important indicator reflecting the working state of the battery and the load fluctuation. The current change amount of the battery can be obtained by calculating the difference between the current value at the current moment and the current value at the previous moment. When the detected current change amount of the battery exceeds the preset range, it means that the battery may be experiencing a large load fluctuation. Such a drastic current change may cause the battery to generate more heat. Therefore, the power of the thermal management module can be further adjusted to better meet the thermal management requirements of the battery.

[0165] When the current change amount is within the set range, it indicates that the battery load is relatively stable, and the thermal management system temporarily does not need to adjust the power of the thermal management module based on the current change. At this time, the temperature change of the battery water inlet can be checked.

[0166] S308. Adjust the power of the thermal management module based on the current of the battery.

[0167] It is understandable that the greater the current, the more heat is generated by the internal resistance of the battery. The power of the thermal management module can be determined according to the ratio of the battery current to the maximum output current of the battery, and the thermal management module can be controlled to operate according to the calculated power.

[0168] S309. Adjust the power of the thermal management module based on the temperature change of the water inlet of the battery.

[0169] It is understandable that the water inlet temperature reflects the heat exchange efficiency in real time after the coolant contacts the battery. When the heat generation rate of the battery fluctuates due to the change of the operating conditions of the electrical energy device, the instantaneous change of the temperature can trigger a rapid response of the power, avoiding local overheating caused by cooling lag, thereby avoiding the risk of thermal runaway. If only relying on the battery current parameter to adjust the thermal management power, the continuous rise of the battery temperature caused by the internal heat accumulation of the battery may be ignored. Therefore, the controller can monitor the water inlet temperature of the battery and adjust the power of the thermal management module according to the water inlet temperature of the battery.

[0170] For example, the controller can determine whether the temperature change amount of the water inlet of the battery is less than the temperature change threshold. If so, the power of the thermal management module is increased; if not, the power of the thermal management module is decreased.

[0171] It can be understood that when the temperature change of the battery water inlet is less than the temperature change threshold, it means that the temperature change of the coolant entering the battery heat exchange area is relatively slow, and there may be a situation where the thermal management system does not respond to the heat dissipation requirements of the battery in a timely manner or the cooling effect is not good. The controller can send an instruction to increase the power to the thermal management module, so that the thermal management module enhances its cooling capacity. After receiving the instruction, the thermal management module can achieve power increase by adjusting the working state of its internal components. When increasing the power, the power can be increased gradually, so that the power of the thermal management module increases in a progressive manner. For example, it can be increased gradually at a rate of 1% of the rated power per second, or the power of the thermal management module can be directly adjusted to the target power to quickly reduce the heat of the coolant.

[0172] It can be understood that if the temperature change of the battery water inlet is greater than or equal to the temperature change threshold, it indicates that the current cooling capacity of the thermal management system can meet the heat dissipation requirements of the battery to a certain extent. At this time, the power of the thermal management module can be reduced. By reducing the power of the thermal management module, energy consumption can be effectively reduced. The power can also be reduced gradually or reduced to the target value at one time. For example, the power of the thermal management module can be gradually reduced at a rate of 1% of the rated power per second until the power of the thermal management module is 0.

[0173] Figure 4 The flowchart of a thermal management method proposed in this application Figure 3 , such as Figure 4 shown, when the received thermal management requirement is a heating requirement, the specific steps executed by the controller include:

[0174] S401. Obtain the temperature of the coolant at the battery water inlet.

[0175] It can be understood that the temperature data of the coolant at the water inlet is an important basis for subsequent judgment on whether the battery needs to be heated and how to heat it. Because the performance of the battery will decrease significantly in a low-temperature environment, affecting the overall performance of the electrical energy device, it is crucial to obtain the temperature of the coolant at the water inlet in a timely manner to maintain the best working state of the battery.

[0176] S402. Judge whether the water inlet temperature is less than the temperature threshold. If so, execute step S403; if not, execute step S404.

[0177] It can be understood that after receiving the coolant temperature at the water inlet, it can be compared with a preset temperature threshold. By way of example, the temperature threshold can be 30 °C. This temperature threshold is determined comprehensively based on various factors such as the operating characteristics of the battery, performance requirements, and environmental adaptability. If the coolant temperature at the water inlet is lower than the temperature threshold, it indicates that the battery is currently in a low-temperature environment, and heating measures need to be taken to increase the battery temperature to ensure that the battery can work normally and efficiently, and to avoid battery performance degradation or even damage caused by low temperature; if the temperature is not lower than the temperature threshold, it means that the battery does not require additional heating for the time being, and other measures to maintain the temperature or adjust the thermal management strategy can be taken.

[0178] S403. Control the thermal management module to operate at the fifth power to heat the battery.

[0179] It can be understood that when the temperature at the water inlet is lower than the temperature threshold, the controller can control the thermal management module to operate at the fifth power. The fifth power can be the maximum power or a power that is a smaller maximum power. The thermal management module usually includes a heating element. When it operates at a larger power, it can quickly generate a large amount of heat and efficiently transfer the heat to the battery through the thermal management circuit. This rapid heating method helps to quickly raise the battery temperature to an appropriate operating range, reduce the working time of the battery at low temperature, and thus reduce the adverse effects of low temperature on the battery performance and life.

[0180] S404. Determine the sixth power of the water pump based on the coolant temperature at the battery water outlet, and control the water pump to operate at the sixth power to heat the battery.

[0181] It can be understood that when it is detected that the coolant temperature at the battery water inlet is greater than or equal to the preset threshold, it means that the coolant temperature is sufficient and there is no need for the thermal management module to heat the coolant at the maximum power. The coolant temperature at the battery water outlet is an intuitive reflection of the actual temperature state of the battery and the heat exchange efficiency. Based on the temperature data, the operating power of the water pump, that is, the sixth power, which can meet the battery heating requirements and prevent overheating or insufficient heating, can be calculated accordingly. Controlling the water pump to operate at the sixth power can accurately regulate the coolant circulation flow rate and establish a stable thermal cycle between the battery and the thermal management module.

[0182] S405. Obtain the change amount of the coolant temperature at the battery water outlet.

[0183] It can be understood that the change amount of the temperature can reflect the effect of the heating measures and the change trend of the battery temperature. By way of example, if the change amount of the temperature is large and shows an upward trend, it indicates that the heating measures are working effectively; on the contrary, if the change amount of the temperature is small or there is no obvious change, it may mean that there is a fault in the heating system or the heating strategy needs to be adjusted.

[0184] S406. Determine whether the change in coolant temperature exceeds the temperature change range. If so, execute step S407; if not, execute step S408.

[0185] It can be understood that after the controller obtains the change in coolant temperature at the battery water outlet, it can compare it with the preset temperature change range. If the temperature change exceeds this range, it may indicate abnormal conditions during the heating process, such as too high heating power, poor coolant circulation, sensor failure, etc. At this time, it is necessary to take timely measures for adjustment to avoid adverse effects on the battery; if the temperature change is within the normal range, it means that the heating process is proceeding as expected, and the current thermal management strategy can be continued. The temperature change range can be, for example, (0, 1).

[0186] S407. Increase the power of the thermal management module.

[0187] It can be understood that during the process of heating the battery, if it is monitored that the coolant temperature shows abnormal fluctuations in a short period of time and the coolant temperature cannot reach the expected heating rate, it means that the heat provided by the current thermal management system is not sufficient to meet the heating requirements of the battery. At this time, the power of the thermal management module can be increased to increase the heat generation of the heating element, so that the coolant temperature rises faster, and then the heating speed of the battery is accelerated. This adjustment helps to quickly improve the working environment of the battery when the battery temperature is too low or the heating effect is not ideal, and ensures that the battery can reach the appropriate working temperature as soon as possible. The power can be increased gradually, for example, at a rate of 5% of the rated power per second to gradually increase the power of the thermal management module.

[0188] S408. Decrease the power of the thermal management module.

[0189] It can be understood that during the process of heating the battery, the change in coolant temperature does not exceed the temperature change range, that is, the temperature at the battery water outlet is equal or changes little, indicating that the battery no longer needs the heat of the coolant. At this time, the thermal management module is controlled to reduce the power. When the battery temperature is already close to or reaches the appropriate working range, reducing the power of the thermal management module can prevent the battery from overheating and prevent damage to the battery performance and life due to too high temperature. The power can be reduced gradually, for example, at a rate of 1% of the rated power per second to gradually reduce the power of the thermal management module.

[0190] It should be noted that the above-described battery thermal management execution process follows a dual-mode trigger mechanism, that is, when the battery management system determines based on temperature thresholds or a user startup instruction generates a clear heating or cooling demand, the controller of the thermal management system will directly respond to the instruction to start the corresponding working condition; or, the controller automatically triggers the heating demand or cooling demand in the preset control strategy by real-time monitoring of the battery temperature and environmental working condition parameters.

[0191] Under heating demand, the controller can terminate the heating power output based on the heating termination signal sent by the battery management system or the feedback signal that the controller autonomously detects that the battery temperature has risen back to the target operating temperature range; while for the cooling demand, a continuous circulation mechanism is adopted. According to the dynamic balance demand between the real-time heat generation power of the battery and the cooling efficiency, adaptive adjustment is maintained during the use stage of the electrical energy device until it completely exits the thermal management cycle after the electrical energy device is turned off.

[0192] Figure 5 The following is a schematic structural diagram of a thermal management device provided by the present application, as Figure 5 shown. The thermal management device 50 provided in this embodiment includes:

[0193] A determination module 501, configured to determine a first power of a thermal management module in the thermal management loop of the battery based on the current of the battery when the thermal management demand of the battery is a cooling demand;

[0194] A control module 502, configured to control the thermal management module to operate at the first power to cool the battery.

[0195] In a possible implementation manner, the determination module 501 is specifically configured to obtain a ratio of the current of the battery to the maximum current of the battery; and determine the first power based on a product of the ratio and the maximum power of the thermal management module.

[0196] In a possible implementation manner, the control module 502 is specifically configured to control the thermal management module to operate at the first power, and control a water pump in the thermal management loop to operate at an initial power.

[0197] In a possible implementation manner, the control module 502 is further configured to, after controlling the thermal management module to operate at the first power, when a duration for which the battery satisfies a first condition is greater than or equal to a preset duration, control the thermal management module to operate at a second power, and control the water pump in the thermal management loop to operate at a third power; the second power is greater than the first power and less than or equal to the maximum power of the thermal management module, and the third power is greater than the initial power of the water pump and less than or equal to the maximum power of the water pump; the first condition includes: the current of the battery is greater than a current threshold, and a coolant temperature difference between the inlet and outlet of the battery is within a preset temperature difference range.

[0198] In a possible implementation manner, the device further includes: an output module 503;

[0199] The output module 503 is configured to output a prompt message indicating that there is a waterway fault in the battery.

[0200] In a possible implementation manner, the determining module 501 is further configured to, after the control module 502 controls the thermal management module to operate at the first power, when the duration for which the battery satisfies the first condition is less than the preset duration, or when the battery does not satisfy the first condition, determine a fourth power of the water pump based on the coolant temperature at the battery water outlet;

[0201] The control module 502 is further configured to control the water pump to operate at the fourth power.

[0202] In a possible implementation manner, the determining module 501 is specifically configured to determine a target power gear of the water pump based on the coolant temperature at the battery water outlet and the mapping relationship between the coolant temperature and the power gears; different power gears correspond to different powers, and the power corresponding to the target power gear is the fourth power;

[0203] The control module 502 is specifically configured to control the water pump to operate at the target power gear.

[0204] In a possible implementation manner, the device further includes an adjustment module 504;

[0205] The adjustment module 504 is configured to, if the current change amount of the battery exceeds the current change amount range, adjust the power of the thermal management module based on the current of the battery.

[0206] In a possible implementation manner, the adjustment module 504 is further configured to, if the current change amount of the battery is within the current change amount range, adjust the power of the thermal management module based on the temperature change at the water inlet of the battery.

[0207] In a possible implementation manner, the adjustment module 504 is specifically configured to, if the temperature change amount at the water inlet of the battery is less than the temperature change threshold, increase the power of the thermal management module; if the temperature change amount at the water inlet of the battery is greater than or equal to the temperature change threshold, decrease the power of the thermal management module.

[0208] In a possible implementation manner, the control module 502 is further configured to, when the thermal management requirement of the battery is a heating requirement and the temperature at the water inlet is less than the temperature threshold, control the thermal management module to operate at a fifth power to heat the battery; the fifth power is less than or equal to the maximum power of the thermal management module.

[0209] In a possible implementation, the determining module 501 is further configured to determine the sixth power of the water pump based on the coolant temperature at the battery outlet when the thermal management requirement of the battery is a heating requirement and the temperature at the water inlet is greater than or equal to the temperature threshold.

[0210] The control module 502 is further configured to control the water pump to operate at the sixth power to heat the battery.

[0211] In a possible implementation, the adjustment module 504 is further configured to adjust the power of the thermal management module based on the change in the coolant temperature at the outlet of the battery.

[0212] In a possible implementation, the adjustment module 504 is specifically configured to increase the power of the thermal management module if the change in the coolant temperature exceeds the range of the change in temperature; and decrease the power of the thermal management module if the change in the coolant temperature is within the range of the change in temperature.

[0213] The thermal management device provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0214] Figure 6 FIG. is a schematic structural diagram of an electronic device provided in this application. As Figure 6 shown, the electronic device 60 provided in this embodiment includes at least one processor 601 and a memory 602. Optionally, the device 60 further includes a communication component 603. Among them, the processor 601, the memory 602, and the communication component 603 are connected through a bus.

[0215] In a specific implementation process, at least one processor 601 executes the computer execution instructions stored in the memory 602, so that at least one processor 601 executes the above method.

[0216] The specific implementation process of the processor 601 can refer to the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0217] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU for short), or other general-purpose processors, digital signal processors (DSP for short), application specific integrated circuits (ASIC for short), etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the invention can be directly implemented by the execution of the hardware processor, or implemented by the combination of the hardware and software modules in the processor.

[0218] The memory may include a random access memory (RAM), and may also include a non-volatile memory (NVM), such as at least one disk memory.

[0219] The bus may be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience in representation, the buses in the drawings of this application are not limited to only one bus or one type of bus.

[0220] This application also provides an electrical energy device, which includes a battery and the above-mentioned thermal management system.

[0221] This application also provides an electrical energy device, which includes a battery, the above-mentioned electronic device, and a thermal management system.

[0222] This application also provides a computer program product, including a computer program, which when executed by a processor implements the above-mentioned method.

[0223] This application also provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the processor executes the computer-executable instructions, the above-mentioned method is implemented.

[0224] The above-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk. The readable storage medium can be any available medium accessible by a general-purpose or special-purpose computer.

[0225] An exemplary readable storage medium is coupled to the processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in a device.

[0226] The division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be an indirect coupling or communication connection through some interfaces, devices, or units, and can be in electrical, mechanical, or other forms.

[0227] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0228] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can physically exist alone, or two or more units can be integrated in one unit.

[0229] If a function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs, etc., all kinds of media that can store program codes.

[0230] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When this program is executed, it executes the steps including the above method embodiments; and the aforementioned storage medium includes: ROMs, RAMs, magnetic disks, or optical discs, etc., all kinds of media that can store program codes.

[0231] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily think of other implementation manners of the present invention. The present invention is intended to cover any variations, uses, or adaptive changes of the present invention. These variations, uses, or adaptive changes follow the general principles of the present invention and include the common general knowledge or conventional technical means in the technical field of the present invention that are not disclosed in the present invention. It is not limited to the precise structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A thermal management method, characterized in that, Including: When the thermal management requirement of the battery is a heat dissipation requirement, based on the current of the battery, determine the first power of the thermal management module in the thermal management circuit of the battery; Control the thermal management module to operate at the first power to dissipate heat from the battery.

2. The method according to claim 1, wherein The determining the first power of the thermal management module in the thermal management circuit of the battery based on the current of the battery includes: Obtain the ratio of the current of the battery to the maximum current of the battery; Based on the product of the ratio and the maximum power of the thermal management module, determine the first power.

3. The method according to claim 1, wherein The controlling the thermal management module to operate at the first power includes: Control the thermal management module to operate at the first power, and control the water pump in the thermal management circuit to operate at an initial power.

4. The method according to any one of claims 1 to 3, characterized in that After the controlling the thermal management module to operate at the first power, the method further includes: If the duration for which the battery satisfies the first condition is greater than or equal to a preset duration, control the thermal management module to operate at a second power, and control the water pump in the thermal management circuit to operate at a third power; the second power is greater than the first power and less than or equal to the maximum power of the thermal management module, and the third power is greater than the initial power of the water pump and less than or equal to the maximum power of the water pump; The first condition includes: the current of the battery is greater than a current threshold, and the temperature difference of the coolant at the inlet and outlet of the battery is within a preset temperature difference range.

5. The method according to claim 4, wherein The method further includes: Output a prompt message indicating that there is a water circuit fault in the battery.

6. The method according to claim 4, wherein After the controlling the thermal management module to operate at the first power, the method further includes: If the duration for which the battery satisfies the first condition is less than the preset duration, or the battery does not satisfy the first condition, determine the fourth power of the water pump based on the coolant temperature at the outlet of the battery; Control the water pump to operate at the fourth power.

7. The method according to claim 6, wherein The determining the fourth power of the water pump based on the coolant temperature at the outlet of the battery includes: Based on the coolant temperature at the outlet of the battery and the mapping relationship between the coolant temperature and the power gear, determine the target power gear of the water pump; different power gears correspond to different powers, and the power corresponding to the target power gear is the fourth power; The controlling the water pump to operate at the fourth power includes: Control the water pump to operate at the target power gear.

8. The method according to claim 6, wherein The method further includes: If the change amount of the current of the battery exceeds the current change amount range, adjust the power of the thermal management module based on the current of the battery.

9. The method according to claim 6, wherein The method further includes: If the change amount of the current of the battery is within the current change amount range, adjust the power of the thermal management module based on the temperature change at the inlet of the battery.

10. The method according to claim 9, wherein The adjusting the power of the thermal management module based on the temperature change at the inlet of the battery includes: If the change amount of the temperature at the inlet of the battery is less than the temperature change threshold, increase the power of the thermal management module; If the change amount of the temperature at the inlet of the battery is greater than or equal to the temperature change threshold, decrease the power of the thermal management module.

11. The method according to claim 1, characterized in that The method further includes: When the thermal management requirement of the battery is a heating requirement and the temperature of the water inlet is less than the temperature threshold, control the thermal management module to operate at a fifth power to heat the battery; the fifth power is less than or equal to the maximum power of the thermal management module.

12. The method according to claim 1, wherein The method further includes: When the thermal management requirement of the battery is a heating requirement and the temperature of the water inlet is greater than or equal to the temperature threshold, determine the sixth power of the water pump based on the coolant temperature at the outlet of the battery; Control the water pump to operate at the sixth power to heat the battery.

13. The method according to claim 12, wherein The method further includes: Adjust the power of the thermal management module based on the change in the coolant temperature at the outlet of the battery.

14. The method according to claim 13, wherein The adjusting the power of the thermal management module based on the change in the coolant temperature at the outlet of the battery includes: If the change in the coolant temperature exceeds the range of the change in temperature, increase the power of the thermal management module; If the change in the coolant temperature is within the range of the change in temperature, decrease the power of the thermal management module.

15. A thermal management device, characterized in that, Includes: A determination module, configured to determine the first power of the thermal management module in the thermal management loop of the battery based on the current of the battery when the thermal management requirement of the battery is a heat dissipation requirement; A control module, configured to control the thermal management module to operate at the first power to dissipate heat from the battery.

16. An electronic device, characterized in that, Includes: A memory, a processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor executes the method according to any one of claims 1-14.

17. A thermal management system, characterized in that, The thermal management system includes: a control module, a thermal management module, a water pump, a water tank; One end of the thermal management module is connected to one end of the water pump and the outlet of the water tank, the other end of the water pump is connected to the inlet of the battery, and the outlet of the battery is connected to the other end of the thermal management module, forming the thermal management loop of the battery; The water tank is configured to provide coolant for the thermal management loop; The thermal management module is configured to heat or cool the coolant in the thermal management loop; The water pump is configured to provide flowing power for the coolant in the thermal management loop; The control module is communicatively connected to the thermal management module and is configured to execute the method according to any one of claims 1-14.

18. The system according to claim 17, wherein The thermal management system further includes: a first temperature sensor, a second temperature sensor; The first temperature sensor is disposed on the inlet side of the battery and is configured to detect the coolant temperature on the inlet side of the battery; The second temperature sensor is disposed on the outlet side of the battery and is configured to detect the coolant temperature on the outlet side of the battery; The control module is communicatively connected to the first temperature sensor and the second temperature sensor respectively.

19. An electrical energy device, characterized in that, The electrical energy device includes a battery and the thermal management system according to claim 17 or 18.

20. An electrical energy device, characterized in that, The electrical energy device includes a battery, the electronic device according to claim 16, and a thermal management system; The thermal management system includes: a thermal management module, a water pump, a first temperature sensor, a second temperature sensor, and a water tank; one end of the thermal management module is connected to one end of the water pump and the water outlet of the water tank, the other end of the water pump is connected to the water inlet of the battery, and the water outlet of the battery is connected to the other end of the thermal management module to form the thermal management loop of the battery; The water tank is configured to provide coolant for the thermal management loop; The thermal management module is configured to heat or cool the coolant in the thermal management loop; The water pump is configured to provide motive power for the flow of the coolant in the thermal management loop.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions that, when executed by a processor, are used to implement the method according to any one of claims 1-14.

22. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the method according to any one of claims 1-14.

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