Vehicle power battery heat preservation method and device, electronic equipment and storage medium

Abstract

The application discloses a heat preservation method and device of a vehicle power battery, electronic equipment and a storage medium. The method comprises the following steps: obtaining a battery state parameter of a power battery of a vehicle and an environment condition parameter of an environment in which the vehicle is currently located; determining a target battery heat preservation strategy from a preset battery heat preservation strategy set based on the battery state parameter and the environment condition parameter, wherein the preset battery heat preservation strategy set comprises a plurality of battery heat preservation strategies, and the preset battery heat preservation strategy set at least comprises a first battery heat preservation strategy, and the first battery heat preservation strategy is used for indicating that a heat-electricity conversion device is driven by electric energy obtained by a new energy equipment to perform heat preservation on the power battery; and performing heat preservation on the power battery based on the target battery heat preservation strategy. The application solves the technical problems that the power battery is excessively consumed in heat preservation in the related art, and the energy utilization rate is low.

Description

Technical Field

[0001] This invention relates to the field of power battery technology, and more specifically, to a method, apparatus, electronic device, and storage medium for heat preservation of a vehicle power battery. Background Technology

[0002] With the development of the new energy vehicle industry, the significant fluctuations in the performance of vehicle power batteries with temperature changes have become a technical bottleneck restricting vehicle performance. In low-temperature environments, the viscosity of lithium-ion battery electrolyte increases, and the internal resistance rises significantly, leading to a sharp reduction in battery capacity and low charging efficiency. This, in turn, can cause a serious reduction in driving range, affecting the driving experience.

[0003] Traditional battery insulation methods such as resistance heating and heat pump systems rely on the battery's charge for energy. This process involves multiple energy conversions, resulting in low energy conversion efficiency and excessive consumption of the battery's charge, impacting the vehicle's remaining range. Consequently, these technologies lead to excessive battery charge consumption and low energy utilization when used for battery insulation.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a method, apparatus, electronic device, and storage medium for heat preservation of a vehicle power battery, in order to at least solve the technical problems in the related art where heat preservation of the power battery leads to excessive consumption of power battery power and low energy utilization.

[0006] According to one aspect of the present invention, a method for heat preservation of a vehicle power battery is provided, comprising: acquiring battery state parameters of the vehicle's power battery and environmental condition parameters of the current environment in which the vehicle is located; determining a target battery heat preservation strategy from a preset battery heat preservation strategy set based on the battery state parameters and environmental condition parameters, wherein the preset battery heat preservation strategy set includes multiple battery heat preservation strategies, and the preset battery heat preservation strategy set includes at least a first battery heat preservation strategy, the first battery heat preservation strategy being used to represent using electrical energy obtained from new energy equipment to drive a thermoelectric conversion device to preserve the power battery; and heat preservation of the power battery based on the target battery heat preservation strategy.

[0007] In this embodiment of the invention, the preset battery insulation strategy set further includes: a second battery insulation strategy, which means using the waste heat of the power system generated during vehicle operation to insulate the power battery; and a third battery insulation strategy, which means using the heat absorbed or released by the preset material during the process of material state change to insulate the power battery.

[0008] In this embodiment of the invention, the new energy equipment is a photovoltaic power generation device, the waste heat of the power system is the braking waste heat and / or drive motor waste heat generated by the vehicle's power system, and the preset material is a phase change material.

[0009] In this embodiment of the invention, determining a target battery insulation strategy from a set of preset battery insulation strategies based on battery state parameters and environmental condition parameters includes: in response to the battery temperature in the battery state parameters not meeting a preset battery temperature range, comparing the light intensity in the environmental condition parameters with a preset light intensity threshold; in response to the light intensity being greater than the preset light intensity threshold, determining the target battery insulation strategy as a first battery insulation strategy; and in response to the light intensity being less than or equal to the preset light intensity threshold, determining the target battery insulation strategy based on the current driving state of the vehicle.

[0010] In this embodiment of the invention, determining a target battery insulation strategy based on the current driving state of the vehicle includes: determining a second battery insulation strategy in response to the current driving state being that the vehicle is in a driving state; and determining a third battery insulation strategy in response to the current driving state being that the vehicle is not in a driving state.

[0011] In this embodiment of the invention, the method further includes: in response to the target battery insulation strategy being a first battery insulation strategy, using the electrical energy obtained from the new energy equipment to drive the thermoelectric conversion device to insulate the power battery; and in response to the presence of residual electrical energy in the electrical energy obtained from the new energy equipment, storing the residual electrical energy into the power battery or a preset material.

[0012] In this embodiment of the invention, the method further includes: in response to the target battery insulation strategy being a third battery insulation strategy and the battery temperature being greater than the upper limit of the preset battery temperature range, controlling the material state of the preset material to change from solid to liquid, so as to use the heat absorbed by the preset material to cool the power battery; in response to the battery temperature being less than the lower limit of the preset battery temperature range, controlling the material state of the preset material to change from liquid to solid, so as to use the heat released by the preset material to heat the power battery.

[0013] In this embodiment of the invention, after the power battery is kept warm based on the target battery heat preservation strategy, the method further includes: in response to the failure to meet the heat preservation requirements of the power battery and the remaining battery charge of the power battery being greater than a preset remaining charge threshold, the power battery is kept warm by providing power to the thermoelectric conversion device based on the target battery heat preservation strategy.

[0014] According to another aspect of the present invention, a heat preservation device for a vehicle power battery is also provided, comprising: an acquisition module, further configured to acquire battery state parameters of the vehicle's power battery and environmental condition parameters of the current environment in which the vehicle is located; a determination module, further configured to determine a target battery heat preservation strategy from a preset battery heat preservation strategy set based on the battery state parameters and environmental condition parameters, wherein the preset battery heat preservation strategy set includes multiple battery heat preservation strategies, and the preset battery heat preservation strategy set includes at least a first battery heat preservation strategy, the first battery heat preservation strategy being used to represent using electrical energy obtained from new energy equipment to drive a thermoelectric conversion device to preserve the power battery; and a heat preservation module, further configured to preserve the power battery based on the target battery heat preservation strategy.

[0015] According to another aspect of the present invention, an electronic device is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods of various embodiments of the present invention during runtime.

[0016] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0017] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0018] According to another aspect of the present invention, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0019] According to another aspect of the present invention, a computer program is also provided, which, when executed by a processor, implements the methods of the various embodiments of the present invention.

[0020] In this embodiment of the invention, firstly, the battery state parameters of the vehicle's power battery and the environmental condition parameters of the vehicle's current environment are obtained. Next, based on the battery state parameters and environmental condition parameters, a target battery insulation strategy can be determined from a preset set of battery insulation strategies. This preset set includes multiple battery insulation strategies, including at least a first battery insulation strategy. The first battery insulation strategy represents using electrical energy obtained from new energy equipment to drive a thermoelectric conversion device to insulate the power battery. Finally, the power battery can be insulated based on the target battery insulation strategy. This application integrates real-time monitoring of the power battery state and vehicle environmental conditions, as well as dynamic selection of the target battery insulation strategy. Based on a comprehensive analysis of the battery state parameters and environmental condition parameters, it can intelligently determine a target battery insulation strategy matching the current condition from the preset set of insulation strategies. The selection process of the target battery insulation strategy considers the energy supply status, the current battery condition, and environmental conditions, ensuring an accurate match between the determined battery insulation strategy and the current condition. The first battery insulation strategy in the pre-defined battery insulation strategy set can directly drive the thermoelectric conversion device to insulate the power battery using electrical energy obtained from new energy equipment. Due to the adoption of direct-drive thermoelectric conversion technology, multiple energy conversion losses are avoided, significantly improving energy conversion efficiency and reducing dependence on the power battery's charge. This effectively solves the problem of excessive power battery consumption during the insulation process in related technologies, while also improving overall energy utilization. Furthermore, it addresses the technical issues of excessive power battery consumption and low energy utilization rates associated with power battery insulation in related technologies. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0022] Figure 1 This is a flowchart of a method for heat preservation of a vehicle power battery according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of an optional heat preservation process for a vehicle power battery according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a heat preservation device for a vehicle power battery according to an embodiment of the present invention. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] According to one aspect of the present invention, a method for heat preservation of a vehicle power battery is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0028] Figure 1 This is a flowchart of a method for heat preservation of a vehicle power battery according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0029] Step S102: Obtain the battery state parameters of the vehicle's power battery and the environmental condition parameters of the vehicle's current environment.

[0030] The aforementioned power battery can refer to the battery pack used to provide power in new energy vehicles, such as electric vehicles and hybrid vehicles. Power batteries can be lithium-ion batteries, which have high energy density and cycle life.

[0031] The aforementioned battery state parameters can refer to parameters used to describe the current state of the power battery, and may include, but are not limited to: battery temperature, battery voltage, battery current, remaining battery capacity, battery health status, battery internal resistance, charge-discharge cycle count, etc., which can be determined according to actual needs.

[0032] The environmental parameters mentioned above can refer to the parameters of the external environment in which the vehicle is located. These parameters can be used to assess the impact of the external environment on the battery and may include, but are not limited to, ambient temperature, light intensity, and vehicle driving status. They can be determined according to actual needs.

[0033] In one optional embodiment, battery state parameters of the power battery are acquired. Specifically, this may include real-time monitoring of the power battery's thermal state using temperature sensors arranged inside and outside the power battery. This monitoring may include the surface temperature of the power battery and the temperature of each internal cell, accurately reflecting the battery's temperature distribution. Voltage and current sensors in the battery management system can be used to collect battery voltage and current data, assessing the battery's state of charge and health, as well as the electrochemical reactions during charging and discharging. The battery management system can be used to perform rapid charge and discharge tests on the power battery, recording voltage and current changes and calculating the battery's internal resistance. Multiple temperature sensors can also be installed externally to the vehicle to monitor ambient temperatures at different locations, including the roof, undercarriage, and outside the passenger compartment, providing comprehensive data for selecting insulation strategies. A light intensity sensor can also be used to monitor the light intensity around the vehicle. The selection of various sensors can ensure high accuracy and fast response characteristics, guaranteeing data accuracy and real-time performance.

[0034] During the above process, based on real-time battery status parameters and environmental condition parameters, the vehicle can react quickly, facilitating the selection of appropriate battery insulation strategies and improving the timeliness and accuracy of battery insulation. By monitoring environmental condition parameters, it can intelligently determine whether to activate the direct power supply mode for new energy equipment, effectively utilizing new energy sources, reducing dependence on the vehicle's power battery, and improving energy efficiency.

[0035] Step S104: Based on battery state parameters and environmental condition parameters, determine the target battery insulation strategy from the preset battery insulation strategy set.

[0036] Among them, the preset battery insulation strategy set includes a variety of battery insulation strategies, and the preset battery insulation strategy set includes at least a first battery insulation strategy. The first battery insulation strategy is used to indicate that the power battery is insulated by using the electrical energy obtained from the new energy equipment to drive the thermoelectric conversion device.

[0037] The aforementioned set of preset battery insulation strategies refers to a pre-defined collection of various battery insulation strategies, allowing for the selection of an appropriate strategy based on different environments and battery state parameters. The set of preset battery insulation strategies includes at least a first battery insulation strategy and may also include other battery insulation strategies, which can be determined according to actual needs.

[0038] The aforementioned target battery insulation strategy refers to a suitable battery insulation strategy intelligently selected from a set of preset battery insulation strategies based on real-time battery status parameters and environmental conditions. Determining the target battery insulation strategy can better utilize existing resources while ensuring the optimal operating temperature of the power battery, reducing energy waste and improving insulation efficiency.

[0039] The aforementioned new energy equipment can refer to various types of new energy power generation equipment, including photovoltaic power generation equipment and wind power generation equipment. For example, when the new energy equipment is photovoltaic power generation equipment, it can utilize solar energy to generate electricity. Photovoltaic power generation equipment can include solar photovoltaic panels, which can be integrated curved photovoltaic panels on the roof or transparent photovoltaic films on the windows. Adopting new energy equipment can reduce dependence on vehicle power batteries, improve energy utilization efficiency, and enhance the green performance of vehicles.

[0040] The aforementioned thermoelectric conversion device refers to a device based on the thermoelectric effect, capable of directly converting electrical energy into heat or cold energy. In this application, a thermoelectric conversion device is used as an electrical-to-heat converter. This device utilizes semiconductor materials to convert electrical energy, enabling more efficient conversion of electrical energy obtained from new energy devices into heat or cold energy for heat preservation of the power battery, achieving rapid and precise temperature control. The semiconductor materials selected for the thermoelectric conversion device, such as bismuth telluride-based thermoelectric materials, have high thermoelectric conversion efficiency, effectively reducing energy loss and improving the overall performance of heat preservation for the power battery.

[0041] In one optional embodiment, a suitable battery insulation strategy can be intelligently selected from a preset set of battery insulation strategies based on collected battery state parameters and environmental condition parameters, serving as the target battery insulation strategy. The current temperature control requirements of the power battery and the availability of external energy can be quickly assessed using a preset analysis algorithm based on collected battery state parameters such as battery temperature, battery state of charge, ambient temperature, and light intensity. The preset set of battery insulation strategies can include multiple battery insulation strategies, each applicable to different conditions. For example, a first battery insulation strategy, utilizing a new energy direct-drive thermoelectric conversion device, can be prioritized when there is sufficient sunlight. Based on built-in intelligent algorithms, such as deep learning-based models, the power battery temperature trend can be dynamically predicted according to real-time data analysis, automatically matching a suitable battery insulation strategy. The intelligent algorithm can consider multiple dimensions such as the current battery state, predicted future temperature changes, and energy availability to ensure the intelligence and effectiveness of the battery insulation strategy selection. The intelligent algorithm can perform static evaluation and also adjust the battery insulation strategy in real time according to dynamically changing environmental conditions and battery state. For example, when sunlight weakens, the system can automatically switch from the primary battery insulation strategy to another battery insulation strategy. The intelligent algorithm also features fault detection and safety redundancy; when the primary battery insulation strategy cannot be executed due to specific conditions, it can quickly activate an alternative battery insulation strategy to ensure the safe and stable operation of the power battery.

[0042] In the above process, the intelligent selection of battery insulation strategies can effectively reduce the dependence of battery insulation on the vehicle's power battery, thereby improving the overall energy utilization rate. The dynamic adjustment capability of intelligent algorithms enables rapid adaptation to environmental changes, improving the stability and reliability of insulation effects, and realizing refined management and dynamic control of battery insulation strategies.

[0043] Step S106: Based on the target battery insulation strategy, the power battery is insulated.

[0044] In one optional embodiment, specific execution instructions can be generated based on the selected target battery insulation strategy. These instructions may include, but are not limited to, the start-up parameters of the thermoelectric conversion device, such as operating voltage and current, the opening degree of the heat flow valve, and the phase change triggering conditions of the phase change material. Considering energy efficiency and safety during execution, the execution instructions can be further adjusted according to the current battery status and environmental conditions to ensure that the battery insulation strategy achieves its insulation effect while avoiding excessive energy consumption or damage to the power battery. Based on the execution instructions, the start-up or adjustment of the operating parameters of the thermoelectric conversion device can be controlled. The thermoelectric conversion device converts electrical energy into heat energy, which acts on the power battery to achieve precise heating or cooling for insulation. The opening degree of the power battery heat flow valve can also be dynamically adjusted to ensure uniform heat distribution or timely recovery, maintaining temperature equilibrium within the power battery. A network of temperature control sensors arranged inside and outside the power battery can continuously monitor temperature changes and transmit the data back to the control system in real time to ensure monitoring of the effectiveness of the power battery insulation strategy. During execution, the intelligent algorithm can continuously analyze the data feedback from the temperature control sensor network and dynamically adjust parameters such as the power output of the thermoelectric conversion device and the opening of the heat flow valve based on the real-time temperature deviation to achieve the best heat preservation effect.

[0045] In the above process, based on the target battery insulation strategy, such as dynamically adjusting the thermoelectric conversion device, high-precision control of the power battery temperature can be achieved, ensuring that the power battery works within the optimal temperature range. This avoids the performance degradation of the power battery caused by excessively high or low temperatures, effectively improving the insulation effect of the power battery in new energy vehicles and enhancing the intelligence and safety of the battery management system.

[0046] In this embodiment of the invention, firstly, the battery state parameters of the vehicle's power battery and the environmental condition parameters of the vehicle's current environment are obtained. Next, based on the battery state parameters and environmental condition parameters, a target battery insulation strategy can be determined from a preset set of battery insulation strategies. This preset set includes multiple battery insulation strategies, including at least a first battery insulation strategy. The first battery insulation strategy represents using electrical energy obtained from new energy equipment to drive a thermoelectric conversion device to insulate the power battery. Finally, the power battery can be insulated based on the target battery insulation strategy. This application integrates real-time monitoring of the power battery state and vehicle environmental conditions, as well as dynamic selection of the target battery insulation strategy. Based on a comprehensive analysis of the battery state parameters and environmental condition parameters, it can intelligently determine a target battery insulation strategy matching the current condition from the preset set of insulation strategies. The selection process of the target battery insulation strategy considers the energy supply status, the current battery condition, and environmental conditions, ensuring an accurate match between the determined battery insulation strategy and the current condition. The first battery insulation strategy in the pre-defined battery insulation strategy set can directly drive the thermoelectric conversion device to insulate the power battery using electrical energy obtained from new energy equipment. Due to the adoption of direct-drive thermoelectric conversion technology, multiple energy conversion losses are avoided, significantly improving energy conversion efficiency and reducing dependence on the power battery's charge. This effectively solves the problem of excessive power battery consumption during the insulation process in related technologies, while also improving overall energy utilization. Furthermore, it addresses the technical issues of excessive power battery consumption and low energy utilization rates associated with power battery insulation in related technologies.

[0047] In this embodiment of the invention, the preset battery insulation strategy set further includes: a second battery insulation strategy, which means using the waste heat of the power system generated during vehicle operation to insulate the power battery; and a third battery insulation strategy, which means using the heat absorbed or released by the preset material during the process of material state change to insulate the power battery.

[0048] The aforementioned waste heat from the power system can refer to the heat generated by the power system during vehicle operation.

[0049] The aforementioned preset material can refer to a material with special thermophysical properties that can be used to store and release heat, and can undergo a change of state of matter at a specific temperature, absorbing or releasing latent heat during the process of the change of state of matter.

[0050] In one optional embodiment, the second battery insulation strategy can be to effectively capture waste heat generated by the drive motor, braking system, etc., during vehicle operation through a heat recovery system, such as using a high-efficiency heat exchanger and heat-conducting liquid. The collected waste heat can be transported to the power battery through capillary networks or heat pipe technology to heat the power battery in a uniform manner and avoid local overheating. Intelligent algorithms can dynamically adjust the opening of the heat flow valve using vehicle driving data and battery temperature data to ensure that waste heat is properly utilized without causing overheating. The third battery insulation strategy can be to use a preset material to undergo a change in the state of matter, absorbing or releasing latent heat during the change to insulate the power battery. For example, the preset material can be encapsulated in an aluminum honeycomb structure, filling the gaps or outer shell of the power battery to form a temperature buffer layer. Temperature sensors distributed within the power battery monitor the battery temperature in real time, and when the temperature exceeds the phase transition temperature of the preset material, a phase transition can be automatically triggered. The phase transition state of the preset material can be controlled by intelligent algorithms to ensure that the power battery temperature is maintained within an optimal range.

[0051] In the above process, the second battery insulation strategy allows the waste heat from the power system that would otherwise be dissipated to be reused, effectively reducing the additional energy consumption of the power battery, lowering energy costs, and improving the economic and environmental benefits of power battery insulation. The third battery insulation strategy utilizes the properties of preset materials to automatically balance the power battery temperature, avoiding the impact of drastic temperature changes on the power battery's performance and lifespan, ensuring that the power battery operates within a constant temperature range, and improving battery safety and reliability.

[0052] In this embodiment of the invention, the new energy equipment is a photovoltaic power generation device, the waste heat of the power system is the braking waste heat and / or drive motor waste heat generated by the vehicle's power system, and the preset material is a phase change material.

[0053] The aforementioned residual braking heat can refer to the heat generated by friction between the brake discs and brake pads in the braking system during the braking process of a vehicle.

[0054] The aforementioned waste heat of the drive motor can refer to the heat energy generated by the vehicle's drive motor during operation. This heat energy can originate from the resistance effect of current passing through the motor coil and mechanical friction.

[0055] The aforementioned phase change materials (PCMs) refer to substances capable of undergoing a phase change at a specific temperature, that is, a transition between a solid and a liquid state, during which they can absorb or release heat. PCMs can be used as a passive insulation and temperature regulation method for power batteries, achieving stable temperature control through their thermophysical properties. Graphene composite PCMs can be used, as they possess high thermal conductivity, high heat storage density, and stable phase change temperature characteristics, making them suitable for temperature management of vehicle power batteries.

[0056] In one alternative embodiment, the braking system and drive motor in the vehicle can maintain the temperature of the power battery through a dedicated heat exchange network. The heat exchange network may include heat exchangers and a heat transfer fluid circulation system, capable of rapidly transferring heat generated by the brake discs, brake pads, drive motor, and braking system. Temperature sensors can be deployed at the nodes of the heat exchange network to monitor temperature changes in real time, providing data support for intelligent algorithms. Through embedded intelligent temperature control algorithms, the valve opening and circulation pump speed of the heat exchange network can be dynamically adjusted to ensure that heat is effectively recovered and evenly distributed to the power battery, avoiding localized overheating. Phase change materials (PCMs) can be designed and encapsulated, distributed around or inside the power battery to form a temperature buffer layer. Based on real-time monitoring of the battery temperature, the timing of the PCM phase change can be intelligently selected. When the battery temperature is below a preset temperature, the PCM releases stored heat; when the battery temperature rises, the PCM absorbs excess heat, maintaining a stable power battery temperature.

[0057] In the aforementioned process, waste heat from braking and drive motors is recovered for battery insulation, achieving efficient closed-loop energy utilization. This significantly improves energy efficiency, reduces the need for additional electrical energy and battery power loss, thereby extending the vehicle's driving range. Intelligent temperature control combined with smart algorithms improves the selection efficiency and execution accuracy of insulation strategies and allows for dynamic adjustments based on vehicle operating status and changes in the external environment, enhancing the intelligence level of the power battery management system.

[0058] In this embodiment of the invention, determining a target battery insulation strategy from a set of preset battery insulation strategies based on battery state parameters and environmental condition parameters includes: in response to the battery temperature in the battery state parameters not meeting a preset battery temperature range, comparing the light intensity in the environmental condition parameters with a preset light intensity threshold; in response to the light intensity being greater than the preset light intensity threshold, determining the target battery insulation strategy as a first battery insulation strategy; and in response to the light intensity being less than or equal to the preset light intensity threshold, determining the target battery insulation strategy based on the current driving state of the vehicle.

[0059] The aforementioned preset battery temperature range refers to a pre-set battery temperature range used to determine the battery temperature, which can be determined according to actual needs.

[0060] The aforementioned preset light intensity threshold can refer to a pre-set light intensity threshold used to determine the magnitude of light intensity, which can be determined according to actual needs.

[0061] In one optional embodiment, the battery temperature can be collected in real time using temperature sensors inside and outside the power battery. This battery temperature data can be uploaded to the battery management system and compared with a preset battery temperature range to determine whether battery insulation is necessary. Next, photoelectric sensors, such as photoresistors, can be used to monitor light intensity in real time and compare it with a preset light intensity threshold to determine whether a first battery insulation strategy should be adopted. The preset light intensity threshold can be set based on the rated power of the photovoltaic equipment and the actual needs of the thermoelectric conversion device, ensuring that the photovoltaic equipment can provide sufficient power when sunlight is abundant. When the light intensity is greater than the preset light intensity threshold, the target battery insulation strategy can be determined as the first battery insulation strategy; when the light intensity is less than or equal to the preset light intensity threshold, the target battery insulation strategy can be determined based on the vehicle's current driving state.

[0062] In the above process, through intelligent strategy selection, the system can quickly respond to changes in battery temperature, fluctuations in ambient light intensity, and changes in vehicle driving status based on battery temperature, lighting conditions, and vehicle driving status. It can intelligently switch insulation strategies, improving the stability and reliability of insulation effects. The dynamic selection of different battery insulation strategies ensures that the power battery can adopt appropriate battery insulation strategies in various environments, so as to ensure that the power battery is maintained within the optimal operating temperature range.

[0063] In this embodiment of the invention, determining a target battery insulation strategy based on the current driving state of the vehicle includes: determining a second battery insulation strategy in response to the current driving state being that the vehicle is in a driving state; and determining a third battery insulation strategy in response to the current driving state being that the vehicle is not in a driving state.

[0064] In one optional embodiment, the vehicle may be equipped with various sensors, including but not limited to vehicle speed sensors, drive motor temperature sensors, and braking system sensors, to continuously monitor the vehicle's driving status and transmit the data to the battery management system in real time. The intelligent algorithm built into the battery management system can analyze the sensor data to determine whether the vehicle is in motion. For example, when the speed sensor detects that the vehicle speed exceeds a preset vehicle speed threshold, it can be confirmed that the vehicle is in motion. Based on the vehicle's current driving status, when determining the target battery insulation strategy, if the vehicle is in motion, a second battery insulation strategy can be prioritized. This strategy utilizes the waste heat from the power system to insulate the power battery. The waste heat generated by the drive motor and braking system can be captured by a heat exchanger and circulated to the power battery through a heat transfer fluid, providing uniform heat energy to the power battery and reducing dependence on the power battery's charge. If the vehicle is not in motion, a third battery insulation strategy can be switched to, utilizing the heat absorbed or released by preset materials during changes in the state of matter to insulate the power battery. It can manage the phase change process of phase change materials. When the phase change material releases the stored heat, it can heat up the power battery; when the phase change material absorbs excess heat, it can cool down the power battery, thereby achieving heat preservation of the power battery.

[0065] In the above process, the selection of battery insulation strategy based on the vehicle's current driving status can effectively utilize the waste heat resources generated by the vehicle itself, avoiding additional consumption of power battery power during driving. Intelligent algorithms can quickly adjust the battery insulation strategy according to real-time changes in the vehicle's driving status, ensuring optimal insulation performance in different scenarios. By intelligently judging the vehicle's current driving status, the battery insulation strategy can be dynamically selected, improving the accuracy and flexibility of power battery temperature control.

[0066] In this embodiment of the invention, the method further includes: in response to the target battery insulation strategy being a first battery insulation strategy, using the electrical energy obtained from the new energy equipment to drive the thermoelectric conversion device to insulate the power battery; and in response to the presence of residual electrical energy in the electrical energy obtained from the new energy equipment, storing the residual electrical energy into the power battery or a preset material.

[0067] The aforementioned surplus electrical energy can refer to the excess electrical energy generated by new energy equipment, such as photovoltaic power generation devices after providing energy to thermoelectric conversion devices for power battery insulation.

[0068] In one optional embodiment, the electrical energy required for battery insulation and the power demand of the thermoelectric conversion device under the current insulation strategy can be assessed. Responding to the target battery insulation strategy being the first battery insulation strategy, i.e., the new energy equipment directly supplies the thermoelectric conversion device, the new energy equipment can convert the received energy into electrical energy and prioritize supplying it to the thermoelectric conversion device for battery insulation. If the electrical energy generated by the new energy equipment exceeds the immediate demand of the thermoelectric conversion device, the remaining electrical energy of the new energy equipment can be intelligently allocated and stored. The remaining electrical energy can be stored in the power battery to replenish its charge. Alternatively, the remaining electrical energy can be converted through electrothermal energy to heat the phase change material encapsulated on the outside of the power battery, bringing the phase change material to a molten state. This allows for the release of heat at night or in rainy weather when the vehicle is not in motion, thereby achieving intelligent allocation and storage of the remaining electrical energy of the new energy equipment.

[0069] In the above process, by intelligently managing the remaining electrical energy of new energy equipment, efficient use of electrical energy is achieved, avoiding waste. The remaining electrical energy is stored in the power battery, increasing its capacity and thus extending the driving range of new energy vehicles. Alternatively, phase change materials can be used as an energy storage medium to store the remaining electrical energy, ensuring that the battery temperature remains within a suitable range even at night or in low light conditions, enhancing the flexibility and adaptability of the insulation strategy.

[0070] In this embodiment of the invention, the method further includes: in response to the target battery insulation strategy being a third battery insulation strategy and the battery temperature being greater than the upper limit of the preset battery temperature range, controlling the material state of the preset material to change from solid to liquid, so as to use the heat absorbed by the preset material to cool the power battery; in response to the battery temperature being less than the lower limit of the preset battery temperature range, controlling the material state of the preset material to change from liquid to solid, so as to use the heat released by the preset material to heat the power battery.

[0071] The aforementioned upper temperature limit can refer to the upper value of the preset battery temperature range. When the battery temperature of the power battery exceeds the upper temperature limit, the performance of the power battery will decrease, and there is a risk of thermal runaway. Cooling measures need to be taken for the power battery.

[0072] The aforementioned lower temperature limit can refer to the lower end of the preset battery temperature range. When the battery temperature of the power battery is lower than the lower temperature limit, the usable capacity and charging and discharging efficiency of the power battery will decrease, and the power battery needs to be heated and kept warm.

[0073] In one optional embodiment, the battery temperature of the power battery can be continuously monitored. In response to the target battery insulation strategy being a third battery insulation strategy, an intelligent algorithm can perform real-time analysis based on the battery temperature to determine whether to trigger a phase change material (PCM). When the battery temperature is detected to be higher than the upper temperature limit, the PCM can be controlled to change from a solid to a liquid state. During this process, the PCM can absorb heat from the surrounding environment of the power battery, thereby cooling the power battery and preventing overheating. If the battery temperature is lower than the lower temperature limit, the PCM can be controlled to change from a liquid to a solid state, releasing the previously stored heat and heating the power battery.

[0074] In the above process, by intelligently regulating the phase change of the phase change material, the temperature of the power battery can be precisely controlled within a preset battery temperature range, avoiding performance fluctuations caused by temperature changes and significantly improving the stability and safety of the power battery. The phase change material absorbs heat when the power battery temperature is too high and releases heat when it is too low, reducing the energy consumption of additional heating or cooling systems and improving the energy utilization efficiency of the insulation system.

[0075] In this embodiment of the invention, after the power battery is kept warm based on the target battery heat preservation strategy, the method further includes: in response to the failure to meet the heat preservation requirements of the power battery and the remaining battery charge of the power battery being greater than a preset remaining charge threshold, the power battery is kept warm by providing power to the thermoelectric conversion device based on the target battery heat preservation strategy.

[0076] The aforementioned preset remaining power threshold refers to a pre-set threshold used to determine the remaining battery power. When the remaining battery power is less than or equal to the preset remaining power threshold, the use of battery power for insulation can be avoided to prevent the battery from running out of power. When the remaining battery power is greater than the preset remaining power threshold, the battery power can be used for battery insulation.

[0077] In one optional embodiment, after the power battery is insulated based on the target battery insulation strategy, in response to the failure to meet the insulation requirements of the power battery, the battery management system can monitor the remaining battery charge. When the remaining battery charge is greater than a preset remaining charge threshold, the target battery insulation strategy will continue to be used to insulate the power battery, and the power battery can be controlled to supply power to the thermoelectric conversion device to achieve insulation of the power battery.

[0078] In the above process, by setting a preset remaining power threshold, when the remaining power of the power battery is less than or equal to the preset threshold, the use of power battery power for insulation can be avoided, thus preventing range anxiety caused by excessive power battery consumption. The established battery remaining power management mechanism realizes intelligent scheduling of the power battery's internal power, and can flexibly adjust the use of power according to actual conditions.

[0079] Figure 2 This is a schematic diagram of an optional heat preservation process for a vehicle power battery according to an embodiment of the present invention, as shown below. Figure 2 As shown, the system acquires the battery state parameters of the vehicle's power battery and the environmental condition parameters of the vehicle's current environment. In response to the battery temperature in the battery state parameters not meeting the preset battery temperature range, the system compares the light intensity in the environmental condition parameters with a preset light intensity threshold. In response to the light intensity being greater than the preset light intensity threshold, the system determines the target battery insulation strategy as the first battery insulation strategy. In response to the light intensity being less than or equal to the preset light intensity threshold, the system determines the target battery insulation strategy based on the vehicle's current driving state. In response to the current driving state being that the vehicle is in motion, the system determines the target battery insulation strategy as the second battery insulation strategy. In response to the current driving state being that the vehicle is not in motion, the system determines the target battery insulation strategy as the third battery insulation strategy. Based on the target battery insulation strategy, the system insulates the power battery.

[0080] The technical solution proposed in this application is described below with reference to an optional embodiment. This application proposes a method for heat preservation of power batteries, which can keep the power batteries of new energy vehicles warm in low-temperature or high-temperature environments, thereby reducing the performance degradation and even the occurrence of dangerous situations caused by excessively low or high battery temperatures. This application can utilize photovoltaic power to power the power battery thermal management system, which can effectively improve the vehicle's winter range; photovoltaic power to power the power battery thermal management system can effectively shorten the low-temperature fast charging time; it can effectively avoid low-temperature lithium plating and high-temperature thermal runaway, effectively improving the cycle life of the power battery; it can effectively integrate photovoltaic, braking waste heat and environmental heat energy, improving the overall energy utilization rate.

[0081] This application achieves constant temperature maintenance of the power battery in low-temperature environments through photovoltaic direct-drive thermoelectric conversion, multi-source heat circulation, and intelligent temperature control algorithms, reducing the power consumption of the vehicle's power battery. Photovoltaic energy capture involves rooftop or window photovoltaic panels converting solar energy into direct current. Intelligent energy distribution prioritizes photovoltaic power to the thermoelectric conversion device, with surplus energy stored in the power battery or phase change thermal storage module. The semiconductor in the thermoelectric conversion device can directly convert electrical energy into heat energy based on the Peltier effect, avoiding the energy loss of traditional resistance heating. Phase change thermal storage utilizes graphene composite phase change materials to absorb and store the heat energy generated by the thermoelectric conversion device; waste heat recovery involves introducing waste heat from the braking system and drive motor into the battery compartment through a capillary network to replenish heat energy at night or on cloudy days. Multi-zone temperature sensors monitor the temperature difference of the power battery in real time, and intelligent algorithms dynamically adjust heat flow valves to ensure stable battery temperature.

[0082] This application can automatically switch between the following operating modes based on environmental conditions and energy supply status: Daytime direct photovoltaic power supply mode: When sunlight is sufficient, the energy transmission path can include photovoltaic power to the thermoelectric conversion device, heating the phase change material to a molten state. After the phase change material is saturated, the remaining electrical energy can be stored in the power battery. Nighttime phase change heat release mode: The trigger condition can be no sunlight. The energy transmission path can include the latent heat released by the solidification of the phase change material, which is uniformly transferred to the power battery through a heat-conducting aluminum plate. If the temperature continues to drop, the waste heat circulation system can be activated to replenish the heat energy. Waste heat recovery mode: The trigger condition can include vehicle operation. The energy transmission path can include braking energy or waste heat from the drive motor, collected by a capillary network, heated by a heat exchanger, and circulated to heat the power battery. Low temperature mode: The trigger condition can include insufficient energy storage in the phase change material. The energy transmission path can include a small amount of power supplied by the power battery, activated by an intelligent algorithm. The thermoelectric conversion device can quickly heat up, while simultaneously sealing the power battery insulation layer and using aerogel insulation to reduce heat loss.

[0083] The photovoltaic power supply module in this application utilizes a combination of an integrated curved photovoltaic panel on the roof and a transparent photovoltaic film on the windows. The photovoltaic panel is directly connected to the thermoelectric conversion device via a DC-to-DC converter, avoiding inverter losses. An energy distribution strategy employs a priority controller; when sunlight is abundant, electrical energy is prioritized to drive the thermoelectric conversion device, with surplus energy stored in the power battery. The thermoelectric converter in the thermoelectric conversion module uses bismuth telluride-based thermoelectric materials. The thermoelectric conversion device is installed at the bottom of the battery pack. For hot and cold end management, a copper vapor chamber is mounted on the hot end, and a liquid cooling pipeline containing ethylene glycol solution is connected to the cold end to prevent heat buildup and efficiency degradation. The heat storage and thermal circulation module uses a composite phase change material formula of paraffin and expanded graphite, encapsulated in an aluminum honeycomb structure and filling the gaps between the power battery modules. The waste heat recovery design involves parallel connection of the braking energy recovery pipeline and the motor cooling circuit, using a plate heat exchanger to introduce waste heat into the phase change material, resulting in high heat recovery efficiency.

[0084] Optionally, during the startup phase, the controller reads the initial battery temperature. If the initial temperature is low, the thermoelectric conversion device can be activated for preheating. Phase change material (PCM) state detection can be performed by measuring the material's expansion rate using resistance strain gauges to determine the remaining heat storage in the PCM. The driving phase can include: daytime operation, where photovoltaic power heats the PCM to a molten state, switching to battery charging after saturation; braking operation, where the drive motor generates waste heat, which is collected by a capillary network, heated by the heat exchanger, and circulated to heat the PCM; and a resting phase, where the PCM solidifies and releases latent heat at night. If the remaining battery power is high, the thermoelectric conversion device can be activated to compensate for the heating; if the remaining battery power is low, only waste heat circulation can be maintained.

[0085] This application adopts a photovoltaic direct-drive thermoelectric conversion architecture, where photovoltaic power directly drives the semiconductor thermoelectric element of the thermoelectric conversion device, skipping the multi-stage energy conversion process from photovoltaic charging to battery discharging to resistance heating, achieving a single-stage, high-efficiency conversion of electrical energy to thermal energy. This application employs multi-source thermal energy collaborative management, integrating photovoltaic thermal energy to drive the thermoelectric conversion device; waste heat from braking or driving motors is recovered through capillary tubes; and ambient heat is released through the three sources of thermal energy from phase change materials, constructing a closed-loop thermal cycle system. An intelligent dynamic temperature control strategy can be adopted, integrating irradiance prediction, historical battery data, and multi-region temperature sensing to achieve four-mode adaptive switching. The phase change material in this application can be replaced; hydrated salts can replace paraffin, and microencapsulated phase change materials can replace aluminum honeycomb structures. The heat transfer path can be replaced; heat pipe solutions can replace capillary networks. The intelligent temperature control algorithm can be replaced; fuzzy proportional-integral-derivative control can replace intelligent prediction models. The sensors in this application can be replaced; fiber optic grating sensors can replace thermistors.

[0086] According to another aspect of the present invention, a heat preservation device for a vehicle power battery is also provided. This device can perform the heat preservation method for a vehicle power battery described in the above embodiments. The specific implementation method and preferred application scenarios are the same as those described in the above embodiments, and will not be repeated here.

[0087] Figure 3 This is a schematic diagram of an authentication device for an in-vehicle application according to an embodiment of this application, such as... Figure 3 As shown, the device includes the following: an acquisition module 302, a determination module 304, and a heat preservation module 306.

[0088] The acquisition module 302 is further used to acquire the battery state parameters of the vehicle's power battery and the environmental condition parameters of the vehicle's current environment; the determination module 304 is further used to determine a target battery insulation strategy from a set of preset battery insulation strategies based on the battery state parameters and environmental condition parameters. The set of preset battery insulation strategies includes multiple battery insulation strategies, and the set of preset battery insulation strategies includes at least a first battery insulation strategy, which represents using the electrical energy obtained from the new energy equipment to drive the thermoelectric conversion device to insulate the power battery; the insulation module 306 is further used to insulate the power battery based on the target battery insulation strategy.

[0089] The preset battery insulation strategy set also includes: a second battery insulation strategy, which means using the waste heat generated by the power system during vehicle operation to insulate the power battery; and a third battery insulation strategy, which means using the heat absorbed or released by preset materials during the process of material state change to insulate the power battery.

[0090] Among them, the new energy equipment is photovoltaic power generation equipment, the power system waste heat is the braking waste heat and / or drive motor waste heat generated by the vehicle's power system, and the preset material is phase change material.

[0091] The determining module is further configured to, in response to the battery temperature in the battery status parameters not meeting the preset battery temperature range, compare the light intensity in the environmental condition parameters with a preset light intensity threshold; in response to the light intensity being greater than the preset light intensity threshold, determine the target battery insulation strategy as the first battery insulation strategy; and in response to the light intensity being less than or equal to the preset light intensity threshold, determine the target battery insulation strategy based on the current driving state of the vehicle.

[0092] The determining module is further configured to determine the target battery insulation strategy as a second battery insulation strategy in response to the current driving state being that the vehicle is in a driving state; and to determine the target battery insulation strategy as a third battery insulation strategy in response to the current driving state being that the vehicle is not in a driving state.

[0093] The insulation module is also used to respond to the target battery insulation strategy as the first battery insulation strategy, and to use the electrical energy obtained by the new energy equipment to drive the thermoelectric conversion device to insulate the power battery; and to store the remaining electrical energy in the electrical energy obtained by the new energy equipment into the power battery or preset materials.

[0094] The heat preservation module is also used to control the material state of the preset material to change from solid to liquid in response to the target battery heat preservation strategy being the third battery heat preservation strategy and the battery temperature being greater than the upper limit value corresponding to the preset battery temperature range, so as to use the heat absorbed by the preset material to cool down the power battery; and to control the material state of the preset material to change from liquid to solid in response to the battery temperature being less than the lower limit value corresponding to the preset battery temperature range, so as to use the heat released by the preset material to heat up the power battery.

[0095] In this module, after the power battery is insulated based on the target battery insulation strategy, the insulation module is also used to respond to situations where the insulation requirements of the power battery are not met and the remaining battery charge is greater than a preset remaining charge threshold. Based on the target battery insulation strategy, the module uses the power battery to provide power to the thermoelectric conversion device to insulate the power battery.

[0096] Embodiments of this application also provide an electronic device, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention during runtime.

[0097] The aforementioned memory can refer to devices inside a computer used to store data and programs, including RAM, hard disks, etc. RAM can be used to temporarily store running programs and data, while hard disks can be used to store programs and data long-term. Memory enables the computer to read and write data and execute programs. The aforementioned processor is responsible for executing instructions in computer programs and performing data processing. It can also be responsible for controlling and executing various operations, including arithmetic operations, logical operations, and data transmission.

[0098] Embodiments of this application also provide a computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0099] The aforementioned computer storage media can refer to the media used in computer memory to store certain discontinuous physical quantities. Computer storage media mainly include semiconductors, magnetic cores, magnetic drums, magnetic tapes, laser discs, etc. Computer-readable storage media include stored programs, which can be a set of instructions that a computer can recognize and execute, running on an electronic computer to meet certain information needs.

[0100] Embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0101] The aforementioned computer program products can refer to software programs that have been written, tested, and released, and can run on computers or other devices. Computer program products can include application programs, operating systems, utility software, etc., used to achieve specific functions or solve specific problems.

[0102] Embodiments of this application also provide a computer program product, including a non-volatile computer-readable storage medium for storing a computer program that, when executed by a processor, implements the methods in various embodiments of the present invention.

[0103] The aforementioned non-volatile computer-readable storage medium can refer to a medium for storing data. Non-volatile computer-readable storage media can retain data without loss when power is off and can be used to store long-term data, such as operating systems, applications, and user files. Non-volatile storage media can include hard disk drives, solid-state drives, optical disks, and flash memory storage devices, etc.

[0104] Embodiments of this application also provide a computer program that, when executed by a processor, implements the methods described in the various embodiments of the present invention.

[0105] The aforementioned computer program can refer to a set of instructions used to tell the computer to perform specific tasks or operations. Computer programs can be written by programmers using specific programming languages ​​and can include algorithms, data structures, logic, and control flow. Computer programs can be used for a variety of purposes, including application software, operating systems, etc.

[0106] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0107] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection can be through some interfaces; the indirect coupling or communication connection between units or modules can be electrical or other forms.

[0108] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0109] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0110] If the integrated unit is implemented as 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 all or part of the 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 to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0111] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for heat preservation of a vehicle power battery, characterized in that, include: Obtain the battery state parameters of the vehicle's power battery and the environmental condition parameters of the vehicle's current environment; Based on the battery state parameters and the environmental condition parameters, a target battery insulation strategy is determined from a preset battery insulation strategy set. The preset battery insulation strategy set includes multiple battery insulation strategies, including at least a first battery insulation strategy, a second battery insulation strategy, and a third battery insulation strategy. The first battery insulation strategy represents using electrical energy obtained from new energy equipment to drive a thermoelectric conversion device to insulate the power battery. The second battery insulation strategy represents using the waste heat from the power system generated during vehicle operation to insulate the power battery. The third battery insulation strategy represents using the heat absorbed or released by a preset material during a change of state to insulate the power battery. Based on the target battery insulation strategy, the power battery is insulated. The method of determining a target battery insulation strategy from a set of preset battery insulation strategies based on the battery state parameters and the environmental condition parameters includes: in response to the battery temperature in the battery state parameters not meeting a preset battery temperature range, comparing the light intensity in the environmental condition parameters with a preset light intensity threshold; in response to the light intensity being greater than the preset light intensity threshold, determining the target battery insulation strategy as the first battery insulation strategy; in response to the light intensity being less than or equal to the preset light intensity threshold, determining the target battery insulation strategy as the second battery insulation strategy when the vehicle's current driving state is that the vehicle is in a driving state, and determining the target battery insulation strategy as the third battery insulation strategy when the vehicle's current driving state is that the vehicle is not in a driving state.

2. The method for heat preservation of a vehicle power battery according to claim 1, characterized in that, The new energy equipment is a photovoltaic power generation device, the waste heat of the power system is the braking waste heat and / or drive motor waste heat generated by the power system of the vehicle, and the preset material is a phase change material.

3. The method for heat preservation of a vehicle power battery according to claim 1 or 2, characterized in that, The method further includes: In response to the target battery insulation strategy being the first battery insulation strategy, the electrical energy obtained by the new energy equipment is used to drive the thermoelectric conversion device to insulate the power battery. In response to the presence of residual electrical energy in the electrical energy obtained by the new energy equipment, the residual electrical energy is stored in the power battery or the preset material.

4. The method for heat preservation of a vehicle power battery according to claim 1 or 2, characterized in that, The method further includes: In response to the target battery insulation strategy being the third battery insulation strategy, and the battery temperature being greater than the upper limit of the preset battery temperature range, the material state of the preset material is controlled to change from solid to liquid, so as to use the heat absorbed by the preset material to cool the power battery. In response to the battery temperature being lower than the lower limit of the preset battery temperature range, the material state of the preset material is controlled to change from the liquid state to the solid state, so as to use the heat released by the preset material to heat up the power battery.

5. The method for heat preservation of a vehicle power battery according to claim 1 or 2, characterized in that, After insulating the power battery based on the target battery insulation strategy, the method further includes: In response to the failure to meet the heat preservation requirements of the power battery, and the remaining charge of the power battery being greater than a preset remaining charge threshold, the target battery heat preservation strategy is used, and the power battery is used to provide power to the thermoelectric conversion device to preserve the power battery.

6. A heat preservation device for a vehicle power battery, characterized in that, include: The acquisition module is used to acquire the battery status parameters of the vehicle's power battery and the environmental condition parameters of the current environment in which the vehicle is located. The determination module is used to determine a target battery insulation strategy from a preset battery insulation strategy set based on the battery state parameters and the environmental condition parameters. The preset battery insulation strategy set includes multiple battery insulation strategies, including at least a first battery insulation strategy, a second battery insulation strategy, and a third battery insulation strategy. The first battery insulation strategy is used to indicate that the power battery is insulated by using the electrical energy obtained from the new energy equipment to drive the thermoelectric conversion device. The second battery insulation strategy is used to indicate that the power battery is insulated by using the waste heat of the power system generated by the vehicle during operation. The third battery insulation strategy is used to indicate that the power battery is insulated by using the heat absorbed or released by the preset material during the change of state of matter. A heat preservation module is used to keep the power battery warm based on the target battery heat preservation strategy; The determining module is further configured to: in response to the battery temperature in the battery status parameters not meeting the preset battery temperature range, compare the light intensity in the environmental condition parameters with a preset light intensity threshold; in response to the light intensity being greater than the preset light intensity threshold, determine the target battery insulation strategy as the first battery insulation strategy; in response to the light intensity being less than or equal to the preset light intensity threshold, if the vehicle's current driving state is that the vehicle is in a driving state, determine the target battery insulation strategy as the second battery insulation strategy; and if the vehicle's current driving state is that the vehicle is not in a driving state, determine the target battery insulation strategy as the third battery insulation strategy.

7. An electronic device, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, executes the heat preservation method for a vehicle power battery according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device on which the storage medium is located to perform the heat preservation method for a vehicle power battery according to any one of claims 1 to 5.

9. A computer program product, characterized in that, It includes computer instructions that, when executed by a processor, implement the heat preservation method for a vehicle power battery according to any one of claims 1 to 5.

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