Battery device, temperature adjustment method, vehicle, storage medium

Abstract

The application provides a battery device, a temperature adjusting method, a vehicle and a storage medium. The battery device can include a battery monomer and a temperature adjusting member. The temperature adjusting member is arranged side by side with the battery monomer. The temperature adjusting member includes a phase change material layer, a temperature collecting member and a heating member. The temperature collecting member is used to collect temperature information of the phase change material layer. The heating member is used to heat the phase change material layer according to a received heating instruction. The heating instruction is generated based on the temperature information of the phase change material layer. The battery device can adjust the temperature of the battery monomer through the temperature adjusting member, so that the battery monomer can continuously work at a relatively stable temperature.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device, a temperature adjusting method, a vehicle and a storage medium. BACKGROUND

[0002] The working temperature of a battery device has an influence on its performance, service life, safety and energy management. For example, large temperature fluctuations or extreme temperatures can accelerate the aging of the battery device, thereby affecting its service life. For another example, excessively high temperature can cause the battery device to have thermal runaway, thereby causing a fire or explosion. For another example, temperature can affect the chemical reaction process or physical process of the battery cells in the battery device, thereby affecting the charging and discharging efficiency and output power of the battery device, and then affecting the performance and / or energy management of the battery. Therefore, making the battery device work in a stable temperature helps to improve its performance, prolong its service life, improve its safety and optimize its energy management strategy.

[0003] However, in the related art, the battery device cannot work continuously in a relatively stable temperature. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a battery device, a temperature adjusting method, a vehicle and a storage medium, so as to adjust the temperature of the battery cells in the battery device through the temperature adjusting member, so that the battery device can work continuously in a relatively stable temperature.

[0005] In a first aspect, the embodiments of the present application provide a battery device, comprising a battery cell and a temperature adjusting member, wherein the temperature adjusting member is arranged side by side with the battery cell; the temperature adjusting member comprises a phase change material layer, a temperature collecting member and a heating member; wherein the temperature collecting member is configured to collect temperature information of the phase change material layer; the heating member is configured to heat the phase change material layer according to a received heating instruction; and the heating instruction is generated based on the temperature information of the phase change material layer. In this way, the temperature of the battery cell can be adjusted by the temperature adjusting member, so that the battery device can work continuously in a stable temperature.

[0006] Optionally, the battery cell and the temperature adjusting member are arranged along a first direction; and the temperature collecting member, the phase change material layer and the heating member are arranged along the first direction. In this way, the adjustment path of the temperature can be the shortest, so as to improve the adjustment efficiency, and to a certain extent, facilitate the arrangement of each device and improve the space utilization.

[0007] Optionally, at least one phase change material layer is arranged between the temperature collecting member and the heating member along the first direction.

[0008] Optionally, the temperature adjusting member comprises a plurality of phase change material layers arranged along the first direction; and the temperature collecting member is arranged between two adjacent phase change material layers along the first direction; and the heating member is arranged between two adjacent phase change material layers along the first direction. In this way, the phase change material layer is arranged between the heating member and the battery cell, so that the temperature rising process and the temperature falling process of the battery cell are more uniform. In the temperature rising process, the lithium precipitation caused by local overheating can also be improved.

[0009] Optionally, the plurality of phase change material layers comprises a first material layer, a second material layer and a third material layer; wherein the second material layer is arranged between the first material layer and the third material layer along the first direction; the temperature collecting member is arranged between the first material layer and the second material layer, and the heating member is arranged between the second material layer and the third material layer. In this way, the interval structure of phase change material layer, temperature collecting member, phase change material layer, heating member and phase change material layer can be formed, so that the cost and temperature control effect can be considered.

[0010] Optionally, the temperature adjusting member comprises a plurality of phase change material layers arranged along the first direction in sequence, and the plurality of phase change material layers are arranged between the temperature collecting member and the heating member. In this way, the temperature collecting member is close to the large surface position of the battery cell, so that the temperature information collected by the temperature collecting member is closer to the temperature of the battery cell, thereby facilitating the generation of more suitable heating instructions. In addition, the heating member is also closer to the large surface position of the battery cell, so that the phase change material layer does not need to transfer heat between the heating member and the battery cell, thereby improving the heating efficiency.

[0011] Optionally, the temperature adjusting member comprises a plurality of temperature collecting members; the phase change material layer has a first surface along the first direction; wherein the plurality of temperature collecting members do not overlap in the orthographic projection on the first surface. In this way, the plurality of temperature collecting members can collect temperature information at different positions in the phase change material layer respectively, so as to more finely adjust the temperature of the battery cell.

[0012] Optionally, the plurality of temperature collecting members are arranged in an array on the first surface. In this way, the plurality of temperature collecting members can be arranged closely to collect the local temperature of the phase change material layer more comprehensively, thereby facilitating the improvement of the accuracy of the adjustment.

[0013] Optionally, the temperature adjusting member comprises a plurality of heating members; the phase change material layer has a second surface along the first direction; wherein the plurality of heating members do not overlap in the orthographic projection on the second surface. In this way, the plurality of heating members can heat different positions in the phase change material layer respectively, so as to heat the corresponding local part of the battery cell, thereby more finely adjusting the temperature of the battery cell.

[0014] Optionally, the plurality of heating members are arranged in an array on the second surface. In this way, the plurality of heating members can be closely arranged to comprehensively heat the local phase change material layer, thereby facilitating fine adjustment of the temperature of the battery cell.

[0015] Optionally, the temperature adjusting member comprises a plurality of temperature collecting members and a plurality of heating members; the phase change material layer has a first surface and a second surface along the first direction; the orthogonal projection of the plurality of temperature collecting members on the first surface does not overlap, and the orthogonal projection of the plurality of heating members on the second surface does not overlap; the heating members correspond to the temperature collecting members one by one. In this way, each heating member can be heated based on the heating instruction generated by the temperature information collected by the temperature collecting member at the corresponding position, so as to heat the local part of the battery cell corresponding to the heating position, thereby achieving fine heating of the battery cell.

[0016] Optionally, the battery device further comprises a connecting member for connecting the temperature adjusting member and the battery cell. In this way, the structural stability of the battery device can be improved.

[0017] Optionally, the connecting member comprises a silica gel suction cup; the temperature adjusting member is adsorbed to the side surface of the battery cell through the silica gel suction cup. In this way, the battery device can be easily disassembled and assembled, and the surface of the battery cell is not easily damaged. In addition, the silica gel suction cup has elasticity and can buffer the vibration impact load received by the battery device, thereby improving the structural strength and stability of the battery device. In addition, the silica gel suction cup has wear resistance, and when it is used as a connecting member between the battery cell and the temperature adjusting member, it can improve the structural damage, content leakage and other situations caused by friction between the temperature adjusting member and the battery cell. Furthermore, the use of silica gel suction cup is not easy to cause environmental pollution problems.

[0018] Optionally, the phase change material layer comprises gallium-indium eutectic alloy and sodium sulfate hydrate. Here, the sodium sulfate hydrate has a lower phase change temperature and a higher latent heat of phase change, thereby effectively absorbing heat; and the gallium-indium eutectic alloy has a higher thermal conductivity and a moderate phase change temperature, which is conducive to accurate temperature regulation of the battery device. Therefore, the battery device can work continuously at an appropriate temperature by using a phase change material layer comprising both of them.

[0019] Optionally, the battery device comprises a plurality of battery cells arranged along the first direction, and the temperature adjusting member is arranged between two adjacent battery cells. In this way, the temperature adjusting member can adjust the temperature of the battery cell adjacent thereto, so that each battery cell can work continuously at a stable temperature.

[0020] In a second aspect, the embodiments of the present application provide a temperature adjusting method, which is used for adjusting the temperature of the battery device as described in the first aspect, and the method comprises: acquiring a first temperature of the phase change material layer collected by the temperature collector; determining a heating power in a case that the first temperature is less than a target temperature; the target temperature is a temperature at which the phase change material in the phase change material layer is in a solid-liquid miscible state; and sending a heating instruction to the heating component, wherein the heating instruction comprises the heating power. In this way, the temperature of the phase change material layer can be adjusted according to the first temperature of the phase change material layer and the target temperature at which the phase change material layer is in the solid-liquid miscible state, so that the phase change material layer can continuously be in the solid-liquid miscible state, and thus the battery cell can continuously work at the target temperature, which is conducive to improving the performance of the battery device, prolonging the service life of the battery device, improving the safety of the battery device, and optimizing the energy management strategy, and the like.

[0021] Optionally, the target temperature is a temperature interval; and the determining the heating power in the case that the first temperature is less than the target temperature comprises: determining the heating power in a case that the first temperature is less than a lower limit value of the temperature interval. Here, it is considered that the phase change of the phase change material layer does not necessarily occur only at a unique target temperature, but can occur within a temperature interval with the target temperature as a reference. Therefore, the heating power can be determined by the lower limit value of the temperature interval, so that the heating component will not be heated within the temperature interval, which can improve the situation of frequent start and stop of the heating component.

[0022] Optionally, before the determining the heating power in the case that the first temperature is less than the lower limit value of the temperature interval, the method further comprises: acquiring a temperature rise rate of the battery cell; determining the temperature interval according to the temperature rise rate of the battery cell; and the interval value of the temperature interval is negatively correlated with the temperature rise rate. In this way, the temperature interval that is suitable can be determined according to the temperature rise rate of the battery cell, so as to help to determine a more accurate heating opportunity.

[0023] Optionally, the battery device comprises a plurality of battery cells arranged along a first direction, the temperature adjusting member is arranged between two adjacent battery cells, and before determining the heating power when the first temperature is less than the lower limit of the temperature interval, the method further comprises: obtaining a temperature rise rate of each of the plurality of battery cells; for each battery cell, determining a temperature interval corresponding to the battery cell according to the temperature rise rate of the battery cell; wherein the interval value of the temperature interval is negatively correlated with the temperature rise rate of the battery cell; and determining the heating power when the first temperature is less than the lower limit of the temperature interval comprises: for each battery cell, when the first temperature of the temperature adjusting member arranged adjacent to the battery cell is less than the lower limit of the temperature interval corresponding to the battery cell, determining the heating power for the battery cell. In this way, the temperature interval corresponding to each battery cell can be adjusted according to the temperature rise rate of each battery cell, thereby reducing the risk of overcooling or overheating of a certain battery cell, and to some extent, helping to improve the temperature consistency of the battery device.

[0024] Optionally, before obtaining the first temperature of the phase change material layer collected by the temperature collecting member, the method further comprises: obtaining a resolution of the temperature collecting member and a temperature rise rate of the battery cell; the resolution represents the minimum temperature change amount that can be distinguished by the temperature collecting member; determining an interval duration for obtaining the first temperature according to the resolution and the temperature rise rate; and obtaining the first temperature of the phase change material layer collected by the temperature collecting member comprises: obtaining the first temperature of the phase change material layer collected by the temperature collecting member according to the interval duration. In this way, the interval duration for obtaining the first temperature can be determined based on the resolution of the temperature collecting member and the temperature rise rate, so that the temperature change can be sensed in time based on the interval duration, more accurate temperature regulation can be achieved, and in addition, the situation of frequent start and stop of the heating member caused by rapid temperature fluctuation can be improved to some extent.

[0025] Optionally, the temperature adjusting component comprises a plurality of temperature collecting components and a plurality of heating components; the phase change material layer has a first surface and a second surface along the first direction; the projections of the plurality of temperature collecting components on the first surface do not overlap, and the projections of the plurality of heating components on the second surface do not overlap; the heating components correspond to the temperature collecting components one by one; and obtaining the first temperature of the phase change material layer collected by the temperature collecting components comprises: obtaining the first temperature at different positions in the phase change material layer from the plurality of temperature collecting components respectively; and determining the heating power in the case that the first temperature is less than a target temperature comprises: for the first temperature of each temperature collecting component, determining the heating power of the heating component corresponding to the temperature collecting component in the case that the first temperature is less than the target temperature. In this way, the corresponding positions in the phase change material layer can be heated, so as to realize fine temperature control of each local part of the battery monomer.

[0026] Optionally, after obtaining the first temperature of the phase change material layer collected by the temperature collecting components, the method further comprises: correcting the first temperature according to a calibrated correction relationship; wherein the correction relationship is calibrated based on the actual temperature of the sample battery monomer and the first temperature of the sample phase change material layer. In this way, the temperature control accuracy of the battery monomer can be improved to a certain extent.

[0027] In a third aspect, an embodiment of the present application provides a temperature adjusting device for adjusting the temperature of the battery device as described in the first aspect, which comprises a collecting circuit board and a controller, wherein the collecting circuit board is connected with the temperature collecting component and is used for obtaining the first temperature of the phase change material layer collected by the temperature collecting component; the controller is used for determining the heating power in the case that the first temperature is less than a target temperature; the target temperature is the temperature at which the phase change material in the phase change material layer is in a solid-liquid miscible state; and the controller is used for sending a heating instruction to the heating component, wherein the heating instruction comprises the heating power.

[0028] In a fourth aspect, an embodiment of the present application provides a vehicle, which comprises: the battery device as described in the first aspect; a collecting circuit board connected with the temperature collecting component and used for obtaining the first temperature of the phase change material layer collected by the temperature collecting component; and a battery management system in communication connection with the collecting circuit board and used for executing the temperature adjusting method as described in the second aspect.

[0029] In a fifth aspect, an embodiment of the present application provides an electronic device, which comprises a processor and a memory, wherein the memory stores computer readable instructions, and when the computer readable instructions are executed by the processor, the steps in the method provided in the second aspect are executed.

[0030] In a sixth aspect, an embodiment of the present application provides a computer readable storage medium, having stored thereon a computer program, which, when executed by a processor, causes the steps of the method according to the second aspect to be performed.

[0031] In a seventh aspect, an embodiment of the present application provides a computer program product, comprising a computer program or instructions, which, when executed by a processor, causes the method according to the second aspect to be performed.

[0032] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and attained by means of the instrumentalities particularly pointed out in the written description and claims hereof. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0034] Figure 1 A structural schematic diagram of a battery device provided by an embodiment of the present application is shown in the figure;

[0035] Figure 2 A structural schematic diagram of a temperature adjusting member provided by an embodiment of the present application is shown in the figure;

[0036] Figure 3 A structural schematic diagram of a temperature adjusting member provided by an embodiment of the present application is shown in the figure; Figure 2 A side view of the temperature adjusting member shown in the figure;

[0037] Figure 4 A structural schematic diagram of another temperature adjusting member provided by an embodiment of the present application is shown in the figure;

[0038] Figure 5 A structural schematic diagram of another temperature adjusting member provided by an embodiment of the present application is shown in the figure; Figure 4 A side view of the temperature adjusting member shown in the figure;

[0039] Figure 6 A schematic diagram of arrangement of a plurality of temperature collecting members provided by an embodiment of the present application is shown in the figure;

[0040] Figure 7 A schematic diagram of arrangement of a plurality of heating members provided by an embodiment of the present application is shown in the figure;

[0041] Figure 8 A flowchart of a temperature adjusting method provided by an embodiment of the present application is shown in the figure;

[0042] Figure 9 A module structure schematic diagram of a temperature adjusting device provided by an embodiment of the present application;

[0043] Figure 10 A structure schematic diagram of a temperature adjusting device provided by an embodiment of the present application;

[0044] 1 - battery monomer, 2 - temperature adjusting part, 3 - connecting part, 4 - phase change material layer, 41 - first material layer, 42 - second material layer, 43 - third material layer, 5 - temperature collecting part, 6 - heating part, 7 - collecting circuit board, 8 - controller, 901 - obtaining module, 902 - determining module, 903 - heating module. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0046] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0047] It should be noted that: in the case of no conflict, the embodiments in the present application or the technical features in the embodiments can be combined.

[0048] In the related art, the battery device cannot work in a relatively stable temperature; specifically, if the temperature of the environment is low, the heat dissipation of the battery device is too fast, etc., it can cause the working temperature of the battery device to be low; on the contrary, if the temperature of the environment is high, the heat dissipation of the battery device is too slow, etc., it can cause the working temperature of the battery device to be high. In the related art, the temperature can be improved by a heating pad in the case of too low temperature, and the temperature can be improved by an air cooling system in the case of too high temperature, or the temperature of the battery device can be adjusted by a liquid cooling system. However, the heating pad is usually used only when the temperature is too low, and the air cooling system is usually used only when the temperature is too high, which cannot make the battery device work continuously in a relatively stable temperature. In addition, the liquid cooling system needs a long time to adjust the temperature when adjusting the temperature, and then the battery device cannot work continuously in a relatively stable temperature.

[0049] To solve the above problems, the present application provides a battery device; specifically, the present application considers that the working temperature of the battery device is usually determined by the working temperature of the battery monomer included therein. Therefore, the battery device adjusts the temperature of the battery monomer by the temperature adjusting member, so that the battery monomer works continuously in a stable temperature, so that the battery device can work continuously in a stable temperature.

[0050] It should be noted that the defects of the above related art solutions are obtained by the inventors after long-term practice and careful study, therefore, the discovery process of the above problems and the solutions proposed by the embodiments of the present application to the above problems should be the contribution of the inventors to the present application in the process of the present application.

[0051] Please refer to Figure 1 which shows a structural schematic diagram of a battery device provided by an embodiment of the present application, which includes a battery monomer 1 and a temperature adjusting member 2, and the temperature adjusting member 2 is arranged side by side with the battery monomer 1.

[0052] In some application scenarios, the temperature adjusting member 2 can be next to the battery monomer 1, and in other application scenarios, the temperature adjusting member 2 can be connected with the battery monomer 1 through a connecting member 3. The connecting member 3 can include a suction cup, adhesive tape, etc.

[0053] In some optional implementations, the connecting piece 3 comprises a silica gel suction cup; and the temperature adjusting piece 2 is adsorbed to the side of the battery monomer 1 through the silica gel suction cup. At this time, the temperature adjusting piece 2 is adsorbed to the battery monomer 1 through the silica gel suction cup, which is convenient for disassembly and installation, and is not easy to cause damage to the surface of the battery monomer 1. In addition, the silica gel suction cup has elasticity, which can buffer the vibration impact load received by the battery device, thereby improving the structural strength and stability thereof. In addition, the silica gel suction cup has wear resistance, and when it is used as the connecting piece 3 between the battery monomer 1 and the temperature adjusting piece 2, it can improve the structural damage, content leakage and the like between the temperature adjusting piece 2 and the battery monomer 1 caused by friction. Furthermore, the use of the silica gel suction cup is not easy to cause environmental pollution problems.

[0054] In some application scenarios, the thickness of each silica gel suction cup is set in consideration of adsorption stability and soft conduction efficiency, for example, the thickness can be set to be in the range of 1.3 mm to 1.7 mm, and an optional value is 1.5 mm.

[0055] In some application scenarios, the battery device can comprise one or more battery monomers 1, and the number of the battery monomers 1 is not limited in the present application. If the battery device comprises a plurality of battery monomers 1, the plurality of battery monomers 1 can be arranged along a first direction (the first direction is also the arrangement direction of the battery monomers 1), and the temperature adjusting piece 2 is arranged between adjacent two battery monomers 1. That is, the plurality of battery monomers 1 and the temperature adjusting piece 2 are arranged in the same direction, and the temperature adjusting piece 2 is arranged between adjacent two battery monomers 1. In this way, the temperature adjusting piece 2 can adjust the temperature of the immediately adjacent battery monomer 1, so that each battery monomer 1 can work continuously at a stable temperature.

[0056] In some application scenarios, the temperature adjusting piece 2 comprises a phase change material layer 4, a temperature collecting piece 5 and a heating piece 6.

[0057] The phase change material layer 4 can comprise a single phase change material (for example, gallium-indium eutectic alloy), or can comprise a plurality of phase change materials. Further, the phase change temperatures of the plurality of phase change materials can be different or the same.

[0058] In some application scenarios, the phase change material layer 4 can comprise gallium-indium eutectic alloy and sodium sulfate hydrate.

[0059] The sodium sulfate hydrate can be sodium sulfate decahydrate, which can undergo phase change in a temperature range of (8-55.6) °C.

[0060] The phase transition temperature of the gallium-indium eutectic alloy is about 15°C, i.e., the gallium-indium eutectic alloy can undergo phase transition at about 15°C. In addition, the gallium-indium eutectic alloy has a shape memory function, and after deformation, it can undergo solid-liquid phase transition through temperature change, thereby restoring the original shape.

[0061] Therefore, when the phase change material layer 4 is made of gallium-indium eutectic alloy and sodium sulfate hydrate, it can undergo phase transition at about 15°C, so that the two materials are in a solid-liquid miscible state.

[0062] Further, according to the definition of specific heat capacity, the heat released by the battery cell 1 can be calculated by the following formula: ; wherein, represents the heat; represents the specific heat capacity; represents the mass of the battery device; represents the temperature change. Then, the temperature of the battery cell 1 is increased by 1°C, and the heat that can be released by the battery cell 1 can be calculated by the formula: . Then, if the specific heat capacity of the battery cell 1 is 0.9 J / g·K, for a battery cell 1 with a mass of 500 grams, a temperature increase of 1°C can release 450 joules of energy. The latent heat of phase transition of the phase change material layer 4 described above can be 250 J / g, i.e., every 30 g of phase change material can absorb the heat released by a 40°C battery cell 1 to maintain the temperature at 15°C. Therefore, the heat released by the battery cell 1 can be absorbed by the phase change material layer 4, and the battery cell 1 can continue to work at 15°C.

[0063] In these application scenarios, sodium sulfate hydrate has a lower phase transition temperature (8°C) and a higher latent heat of phase transition (250 kJ / kg), thereby effectively absorbing heat; and gallium-indium eutectic alloy has a higher thermal conductivity and a moderate phase transition temperature (15°C), which is conducive to precise temperature regulation of the battery device. Therefore, the phase change material layer 4 including both can enable the battery device to work continuously at an appropriate temperature.

[0064] It can be understood that when the temperature of the battery cell 1 is low, the phase change material layer 4 can change from a liquid state to a solid state, thereby releasing heat to warm up the battery cell 1. When the temperature of the battery cell 1 is high, the phase change material layer 4 can change from a solid state to a liquid state to absorb the heat of the battery cell 1, thereby cooling the battery cell 1. Therefore, by adjusting the temperature of the phase change material layer 4, the temperature of the battery cell 1 can be adjusted.

[0065] The temperature acquisition device 5 is used to acquire the temperature information of the phase change material layer 4. In some application scenarios, the temperature acquisition device 5 may include devices that can be used to acquire the first temperature information, such as thermistors, thermocouples, and platinum resistance thermometers.

[0066] The heating element 6 is used to heat the phase change material layer 4 according to the received heating command; the heating command is generated based on the temperature information of the phase change material layer 4.

[0067] In some application scenarios, for example, the controller can obtain the temperature information collected by the temperature acquisition unit 5, generate the above-mentioned heating command based on the temperature information, and then send the heating command to the heating unit 6 so that the heating unit 6 can heat the phase change material layer 4 according to the heating command.

[0068] In these application scenarios, if the phase change material layer 4 comprises a gallium-indium eutectic alloy and sodium sulfate hydrate, the controller can, for example, remain inactive when the acquired temperature is above 15°C, allowing the phase change material layer 4 to cool down by absorbing heat. When the acquired temperature is below 15°C, a heating command can be sent to the heating element 6 to increase the temperature of the phase change material layer 4, thereby releasing heat to the battery cell 1 and raising its temperature. When the acquired temperature is equal to 15°C, the heat release and absorption processes within the phase change material layer 4 reach a dynamic equilibrium, preventing it from releasing or absorbing heat externally, thus not affecting the temperature of the battery cell 1 and allowing it to continue operating at the current temperature. Therefore, the temperature of the battery device can be regulated by the aforementioned temperature regulating element 2, enabling it to operate continuously at a stable temperature.

[0069] In some applications, the temperature acquisition element 5, phase change material layer 4, and heating element 6 can be integrated using polyimide coating, facilitating installation and disassembly. Furthermore, the polyimide coating itself is heat-resistant, thus forming a thermal barrier in the event of thermal runaway or localized overheating in a single battery cell 1, preventing heat from spreading to adjacent battery cells 1 and improving the safety of the battery device.

[0070] In some applications, if the temperature sensing element 5 is a thermistor, its thickness can be, for example, in the range of 0.3mm to 0.6mm, with an optional value of 0.5mm; the thickness of the heating element 6 can be, for example, in the range of 0.3mm to 0.6mm, with an optional value of 0.5mm; and the thickness of a single phase change material layer 4 can be, for example, in the range of 1.5mm to 2.5mm, with an optional value of 2mm. This makes the thickness of the temperature regulating element 2 moderate, balancing the space utilization and temperature regulation efficiency of the battery device to a certain extent.

[0071] In some optional implementations, the battery cells 1 and the temperature adjusting members 2 are arranged along a first direction; the temperature collecting members 5, the phase change material layers 4, and the heating members 6 are arranged along the first direction. For example, if the battery cells 1 and the temperature adjusting members 2 are arranged horizontally, the temperature collecting members 5, the heating members 6, and the phase change material layers 4 are also arranged along the same horizontal direction. In this way, the temperature adjusting path can be the shortest, so that the adjusting efficiency can be improved, and the arrangement of the various components can be facilitated to some extent, and the space utilization can be improved.

[0072] In the related art, the temperature of the battery cells 1 can be measured by the built-in temperature sensing wire arranged at a specific position or the negative temperature coefficient thermistor installed on the top of the battery cells 1, and then the temperature of the battery cells 1 is controlled based on the temperature. However, this is limited by the temperature measuring position and the number of temperature measuring devices, so the temperature of the battery cells 1 cannot be accurately measured.

[0073] Therefore, in some application scenarios, the first direction can include the arrangement direction of the large face (here, the side face with the largest area in the battery cells 1) of the battery cells 1. In this way, the plurality of battery cells 1 can be arranged in sequence with the same large face as the reference, and the temperature adjusting members 2 can also be arranged in the same direction. In this way, the temperature measuring position and the number of temperature measuring devices are not limited, and the side face temperature of the battery cells 1 can be collected, so that the accuracy of the temperature of the battery cells 1 is improved to some extent, thereby facilitating the temperature adjustment of the battery cells 1.

[0074] In some optional implementations, at least one phase change material layer 4 is arranged between the temperature collecting member 5 and the heating member 6 along the first direction. That is, the number of phase change material layers 4 can be set according to actual needs, which can be one or more, and is not limited here.

[0075] Please continue to refer to Figure 2 and Figure 3 . Among them, Figure 2 which shows a structure diagram of a temperature adjusting member 2 provided by an embodiment of the present application, Figure 3 shows Figure 2 a side view of the temperature adjusting member 2 in Figures 2-3 As shown in the figure, the temperature adjusting member 2 includes a plurality of phase change material layers 4 arranged along the first direction; and along the first direction, the temperature collecting member 5 is arranged between two adjacent phase change material layers 4; and the heating member 6 is arranged between two adjacent phase change material layers 4. In this way, the heating member 6 is spaced apart from the battery cells 1 by the phase change material layer 4, so that the heating process and the cooling process of the battery cells 1 are more uniform. In the heating process, the lithium precipitation caused by local overheating can also be improved.

[0076] In some optional implementations, the plurality of phase change material layers 4 includes a first material layer 41, a second material layer 42, and a third material layer 43; along the first direction, the second material layer 42 is arranged between the first material layer 41 and the third material layer 43; the temperature collection member 5 is arranged between the first material layer 41 and the second material layer 42, and the heating member 6 is arranged between the second material layer 42 and the third material layer 43. In this way, a spacing structure of the phase change material layer 4, the temperature collection member 5, the phase change material layer 4, the heating member 6, and the phase change material layer 4 can be formed, so that the cost and temperature control effect can be considered.

[0077] Please continue to refer to Figure 4 and Figure 5 wherein, Figure 4 shows a structure schematic diagram of another temperature adjusting member 2 provided by the embodiment of the application, Figure 5 shows Figure 4 a side view of the temperature adjusting member 2. As Figures 4-5 shown, the temperature adjusting member 2 includes a plurality of phase change material layers 4 arranged in sequence along the first direction, and the plurality of phase change material layers 4 are arranged between the temperature collection member 5 and the heating member 6. In this way, the temperature collection member 5 is close to the position of the large surface of the battery monomer 1, so that the temperature information collected by the temperature collection member 5 is closer to the temperature of the battery monomer 1, thereby facilitating the generation of more suitable heating instructions. In addition, the heating member 6 is also closer to the position of the large surface of the battery monomer 1, so that the phase change material layer 4 does not need to transfer heat between the heating member 6 and the battery monomer 1, thereby improving the heating efficiency.

[0078] Please continue to refer to Figure 6 which shows a schematic diagram of the arrangement of a plurality of temperature collection members 5 provided by the embodiment of the application. As Figure 6 shown, the temperature adjusting member 2 includes a plurality of temperature collection members 5; along the first direction, the phase change material layer 4 has a first surface; wherein the orthographic projection of the plurality of temperature collection members 5 on the first surface does not overlap. Thus, the plurality of temperature collection members 5 can collect temperature information at different positions in the phase change material layer 4, respectively, so as to more finely adjust the temperature of the battery monomer 1.

[0079] In some application scenarios, for example, the average or median of the plurality of temperatures collected by the plurality of temperature collection members 5 can be determined as the temperature of the phase change material layer 4, thereby improving the inaccuracy that may be caused by collecting the first temperature information by a single temperature collection member 5, and improving the accuracy of adjustment to a certain extent.

[0080] In some optional implementations, the plurality of temperature collecting elements 5 are arrayed on the first surface. In this way, the plurality of temperature collecting elements 5 can be closely arranged to comprehensively collect the local temperature of the phase change material layer 4, thereby facilitating the improvement of the accuracy of the adjustment.

[0081] It should be noted that when the battery device includes a plurality of temperature collecting elements 5, it can include one or more heating elements 6. Among them, if only one heating element 6 is included, the heating power of the heating element 6 can be determined by, for example, the average of the temperatures collected by the plurality of temperature collecting elements 5. If a plurality of heating elements 6 are included, the heating power of each heating element 6 can also be determined by, for example, the average of the temperatures collected by the plurality of temperature collecting elements 5.

[0082] Please continue to refer to Figure 7 which shows a schematic diagram of the arrangement of a plurality of heating elements 6 provided by an embodiment of the present application, as shown in Figure 7 The temperature adjusting element 2 includes a plurality of heating elements 6; along the first direction, the phase change material layer 4 has a second surface; wherein the orthogonal projection of the plurality of heating elements 6 on the second surface does not overlap. In this way, the plurality of heating elements 6 can heat different positions in the phase change material layer 4 respectively, so as to heat the corresponding local part of the battery monomer 1, thereby more finely adjusting the temperature of the battery monomer 1.

[0083] In some optional implementations, the plurality of heating elements 6 are arrayed on the second surface. In this way, the plurality of heating elements 6 can be closely arranged to more comprehensively heat the local part of the phase change material layer 4, thereby facilitating the fine adjustment of the temperature of the battery monomer 1.

[0084] It should be noted that when the battery device includes a plurality of heating elements 6, it can also include one or more temperature collecting elements 5. Among them, if only one temperature collecting element 5 is included, the heating power of each heating element 6 can be determined by, for example, the temperature collected by the temperature collecting element 5. If a plurality of temperature collecting elements 5 are included, the heating power of each heating element 6 can also be determined by, for example, the average of the temperatures collected by the plurality of temperature collecting elements 5.

[0085] Please refer to Figures 6-7 In some optional implementations, the temperature adjusting element 2 includes a plurality of temperature collecting elements 5 and a plurality of heating elements 6; along the first direction, the phase change material layer 4 has a first surface and a second surface; the first surface and the second surface are not the same surface. Among them, the orthogonal projection of the plurality of temperature collecting elements 5 on the first surface does not overlap, and the orthogonal projection of the plurality of heating elements 6 on the second surface does not overlap; the heating element 6 and the temperature collecting element 5 correspond one by one.

[0086] That is, the number of heating pieces 6 and temperature collection pieces 5 can be the same, and the arrangement positions of the two can also be the same, so that each heating piece 6 can be heated based on the heating instruction generated based on the temperature information collected by the temperature collection piece 5 at the corresponding position, to heat the local part of the battery monomer 1 corresponding to the heating position, and realize fine heating of the battery monomer 1.

[0087] In some application scenarios, in order to further fine heat the battery monomer 1, the shape of each temperature collection piece 5 can also be the same as the shape of each heating piece 6, for example, both are rectangular.

[0088] Please refer to Figure 8 , which shows a flowchart of a temperature adjustment method provided by an embodiment of the present application. In some application scenarios, the above-mentioned temperature adjustment assembly can be executed by a controller, an industrial computer, etc. Hereinafter, the controller is taken as an example for description.

[0089] As shown in Figure 8 , the temperature adjustment method comprises the following steps 801 to 803:

[0090] Step 801: acquiring the first temperature of the phase change material layer collected by the temperature collection piece;

[0091] Step 802: determining the heating power in the case that the first temperature is less than the target temperature; the target temperature is the temperature at which the phase change material in the phase change material layer is in a solid-liquid miscible state; for example, if the phase change material layer comprises gallium-indium eutectic alloy and sodium sulfate hydrate, the target temperature can be 15℃.

[0092] In some application scenarios, the heating power can be determined, for example, by a PID algorithm (a kind of algorithm function used in closed-loop control system). The calculation formula of the PID algorithm is: ; wherein, represents the heating power; represents a proportional coefficient, which can be, for example, 1.0; represents an integral coefficient, which can be, for example, 0.1; represents a differential coefficient, which can be, for example, 0.5; represents the temperature difference between the target temperature and the first temperature.

[0093] Step 803: sending a heating instruction to the heating piece, wherein the heating instruction comprises the heating power. Then, the heating piece can output the corresponding heating power to heat the phase change material layer, so as to increase the temperature of the battery monomer through the phase change material layer.

[0094] In the present implementation, the temperature of the phase change material layer can be adjusted according to the first temperature of the phase change material layer and the target temperature at which the phase change material layer is in the solid-liquid miscible state, so that the phase change material layer can continuously be in the solid-liquid miscible state, thereby enabling the battery cell to continuously work at the target temperature, which is conducive to improving the performance of the battery device, prolonging the service life of the battery device, improving the safety of the battery device, and optimizing the energy management strategy, etc.

[0095] It should be noted that when the temperature of the battery cell is different, the adjustment process of the battery cell based on the phase change material layer can refer to the corresponding part of the foregoing, which will not be described here.

[0096] In some optional implementations, the target temperature is a temperature interval; that is, the phase change of the phase change material layer does not occur only at a unique temperature, but can occur within a temperature interval, and then the temperature interval of the target temperature can be determined. For example, if the phase change material layer includes gallium-indium eutectic alloy and sodium sulfate hydrate, the phase change temperature is generally 15°C, but it can also change at (15±0.5) °C. This (15±0.5) °C can be regarded as the temperature interval of the target temperature 15°C.

[0097] It should be noted that the above temperature interval can be preset based on experience, or can be obtained after continuous adjustment during the temperature adjustment process of the battery cell, which is not limited here.

[0098] In this way, the determination of the heating power when the first temperature is less than the target temperature in the step 802 includes: determining the heating power when the first temperature is less than the lower limit value of the temperature interval.

[0099] For example, when the phase change material layer includes gallium-indium eutectic alloy and sodium sulfate hydrate, the lower limit value of the temperature interval is 14.5°C, and then the heating power can be determined by using the above PID algorithm when the first temperature is less than 14.5°C, so as to heat the battery cell by using the heating power. When it is greater than 14.5°C, the heating member can be disabled or stopped, and the residual heat can be used to continue heat transfer to the battery cell.

[0100] In the present implementation, it is considered that the phase change material layer does not necessarily change only at a unique target temperature, but can change within a temperature interval based on the target temperature. Therefore, the heating power can be determined by the lower limit value of the temperature interval, so that the heating member will not heat within the temperature interval, which can improve the frequent start-stop situation of the heating member.

[0101] It should be noted that when the first temperature is greater than the upper limit value of the temperature interval, the phase change material layer can absorb heat through solid-liquid phase change, thereby inhibiting the temperature rise of the battery cell.

[0102] In some optional implementations, in the case that the first temperature is less than the lower limit of the temperature interval, before determining the heating power, the method further comprises the following determination step of the temperature interval:

[0103] First, the temperature rise rate of the battery cell is obtained.

[0104] In some application scenarios, the temperature of the battery cell in a unit time can be collected using a thermocouple, so as to obtain the temperature rise rate thereof. In other application scenarios, the temperature of the battery cell can also be collected multiple times at intervals using a thermocouple, so as to obtain the temperature rise rate thereof based on the interval and the change in temperature.

[0105] Then, the temperature interval can be determined according to the temperature rise rate of the battery cell; wherein the interval value of the temperature interval is negatively correlated with the temperature rise rate.

[0106] In some application scenarios, if the battery device includes multiple battery cells, the temperature interval can be determined according to the average temperature rise rate of the multiple battery cells or the median of the multiple temperature rise rates. If the battery device includes only one battery cell, the temperature interval can be determined only according to the temperature rise rate of the battery cell.

[0107] In addition, if the temperature rise rate is fast (for example, the battery cell is in a fast charging state), a relatively small interval value can be set to stop heating in advance and reduce the risk of temperature overshoot due to the thermal inertia of the phase change material layer.

[0108] If the temperature rise rate is slow (for example, the battery cell is in a static state), a relatively large interval value can be set to reduce the heating frequency, which can reduce energy consumption and prolong the service life of the battery cell to some extent.

[0109] For example, if the preset temperature interval is (15±0.5)℃, and the temperature rise rate is large (for example, greater than a preset threshold), the interval value can be increased by 0.5℃ according to an empirical value, and the temperature interval at this time can be (15±1)℃.

[0110] In some application scenarios, the temperature rise rates of multiple sample battery cells and the corresponding adaptive temperature intervals can be calibrated in advance, and a mapping relationship between the temperature rise rate and the temperature interval is determined, so that when the temperature rise rate of the battery cell is obtained, the corresponding temperature interval can be determined according to the mapping relationship.

[0111] In this implementation, the temperature interval that is suitable for the battery cell can be determined according to the temperature rise rate of the battery cell, which is helpful to determine a more accurate heating time.

[0112] In some optional implementations, the battery device includes a plurality of battery monomers arranged along a first direction, and the temperature adjusting member is arranged between two adjacent battery monomers. In the case where the first temperature is less than the lower limit of the temperature range, the temperature rising rate of each battery monomer can be obtained before the heating power is determined. Then, for each battery monomer, the temperature range corresponding to the battery monomer is determined according to the temperature rising rate of the battery monomer. The interval of the temperature range is negatively correlated with the temperature rising rate of the battery monomer.

[0113] In this way, for each battery monomer, the heating power for the battery monomer can be determined in the case where the first temperature of the temperature adjusting member arranged adjacent to the battery monomer is less than the lower limit of the temperature range corresponding to the battery monomer.

[0114] In the present implementation, since the battery device includes a plurality of battery monomers and the temperature adjusting member is arranged between two adjacent battery monomers, the temperature of each battery monomer can be adjusted by the temperature adjusting member. Based on this, the temperature range corresponding to each battery monomer can be determined according to the temperature rising rate of the battery monomer, so as to reduce the risk of overcooling or overheating of the battery monomer, and to help improve the temperature consistency of the battery device to a certain extent.

[0115] In some application scenarios, considering that the temperature of the phase change material layer does not directly jump to the target temperature, but gradually increases or decreases, the interval length of the first temperature information can be set in advance to timely perceive the temperature change and realize more accurate temperature regulation.

[0116] Therefore, in some optional implementations, before the first temperature of the phase change material layer collected by the temperature collector is obtained in step 801, the method further includes:

[0117] First, the resolution of the temperature collector and the temperature rising rate of the battery monomer are obtained. The resolution represents the minimum temperature change amount that can be distinguished by the temperature collector.

[0118] In some application scenarios, when the temperature collector sends the temperature information, the resolution information of the temperature collector can also be sent to the controller, so that the controller obtains the resolution of the temperature collector.

[0119] In addition, the process of obtaining the temperature rising rate of the battery monomer is described in the foregoing part, which is not repeated here.

[0120] Then, according to the resolution and the temperature rise rate, an interval duration for obtaining the first temperature is determined; for example, the resolution of the temperature collection component is 1℃, and the temperature rise rate is 1℃ per minute, and then the interval duration can be determined as 1 minute.

[0121] In this way, the first temperature of the phase change material layer collected by the temperature collection component can be obtained according to the interval duration.

[0122] In the present implementation, the interval duration of the first temperature can be determined based on the resolution of the temperature collection component and the temperature rise rate, so that the temperature change can be sensed in time based on the interval duration, and more accurate temperature regulation can be achieved, and in addition, the situation that the heating component is frequently started and stopped due to rapid temperature fluctuations can be improved to a certain extent.

[0123] In some optional implementations, the temperature regulating component includes a plurality of temperature collection components and a plurality of heating components; the phase change material layer has a first surface and a second surface along the first direction; the projections of the plurality of temperature collection components on the first surface do not overlap, and the projections of the plurality of heating components on the second surface do not overlap; and the heating pieces and the temperature collection components correspond one by one.

[0124] In this way, the controller can obtain the first temperature at different positions in the phase change material layer from the plurality of temperature collection components respectively; and then, for the first temperature of each temperature collection component, the heating power of the heating component corresponding to the temperature collection component is determined in the case that the first temperature is less than the target temperature.

[0125] In the present implementation, the heating power of a heating component at a corresponding position can be determined by the first temperature of a temperature collection component, so that the corresponding position in the phase change material layer can be heated, thereby realizing fine temperature control of each local part of the battery monomer. For example, the temperature collection component A is located at the A' position of the first surface of the phase change material layer; the heating component B is located at the B' position of the second surface of the phase change material layer, and the projections of the A' position and the B' position in the phase change material layer overlap. Therefore, the heating power of the heating component B can be determined by the temperature collected by the temperature collection component A, so as to control the heating component B to heat the local area of the phase change material layer.

[0126] In some application scenarios, considering that the temperature of the phase change material layer is not equivalent to the temperature of the battery monomer, in order to more accurately control the temperature of the battery monomer, in some optional implementations of the present application, after the first temperature of the phase change material layer collected by the temperature collection component is obtained in the above step 801, the controller can further correct the first temperature according to a calibrated correction relationship; wherein the correction relationship is calibrated based on the actual temperature of the sample battery monomer and the first temperature of the sample phase change material layer.

[0127] In some application scenarios, a heat conduction model can be constructed by a heat conduction formula, for example: ; wherein, represents the heat conducted by the phase change material in the phase change material layer; represents the heat flow of the phase change material; represents the heat conduction area of the temperature adjusting member; represents the heat conduction coefficient of the phase change material; represents the first temperature of the phase change material layer; represents the actual temperature of the battery cell; represents the thickness of the phase change material layer.

[0128] It can be seen that the actual temperature of the battery cell and the first temperature of the phase change material layer are in a linear function correspondence relationship, and therefore, the simplified correspondence relationship can be obtained as: ; wherein, and is a correction parameter. Here, the correction parameter can be calibrated by obtaining the actual temperature of a plurality of sample battery cells and the first temperature of the sample phase change material layer, so that the above correction relationship can be obtained.

[0129] Then, after obtaining the first temperature of the phase change material layer, the corrected temperature can be obtained according to the above correction relationship, which can improve the temperature control accuracy of the battery cell to a certain extent.

[0130] Those skilled in the art can understand that the writing order of each step in the above method of the specific embodiment does not mean a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0131] Please refer to Figure 9 , which shows a module structure diagram of a temperature adjusting device provided by an embodiment of the present application. The temperature adjusting device can be a module, a program segment or code on an electronic device. It should be understood that the temperature adjusting device corresponds to the above Figure 8 method embodiment, and can execute each step involved in the Figure 8 method embodiment.

[0132] Optionally, the temperature adjusting device comprises an obtaining module 901, a determining module 902 and a heating module 903. The obtaining module 901 is configured to obtain a first temperature of the phase change material layer collected by the temperature collecting component. The determining module 902 is configured to determine a heating power when the first temperature is less than a target temperature. The target temperature is a temperature at which the phase change material in the phase change material layer is in a solid-liquid miscible state. The heating module 903 is configured to send a heating instruction to the heating component, and the heating instruction comprises the heating power.

[0133] Optionally, the target temperature is a temperature interval, and the determining module 902 is further configured to determine the heating power when the first temperature is less than a lower limit value of the temperature interval.

[0134] Optionally, the device further comprises a temperature interval determining module configured to, before determining the heating power when the first temperature is less than the lower limit value of the temperature interval, obtain a temperature rise rate of the battery monomer, and determine the temperature interval according to the temperature rise rate of the battery monomer. The interval value of the temperature interval is negatively correlated with the temperature rise rate.

[0135] Optionally, the battery device comprises a plurality of battery monomers arranged along a first direction, and the temperature adjusting component is arranged between adjacent battery monomers. The device further comprises a temperature interval determining module configured to, before determining the heating power when the first temperature is less than the lower limit value of the temperature interval, obtain a temperature rise rate of each battery monomer of the plurality of battery monomers, and determine, for each battery monomer, a temperature interval corresponding to the battery monomer according to the temperature rise rate of the battery monomer. The interval value of the temperature interval is negatively correlated with the temperature rise rate of the battery monomer. The determining module 902 is further configured to, for each battery monomer, determine the heating power for the battery monomer when the first temperature of the temperature adjusting component arranged adjacent to the battery monomer is less than the lower limit value of the temperature interval corresponding to the battery monomer.

[0136] Optionally, the device further comprises an interval duration determining module configured to, before obtaining the first temperature of the phase change material layer collected by the temperature collecting component, obtain a resolution of the temperature collecting component and a temperature rise rate of the battery monomer. The resolution represents a minimum temperature change amount that can be distinguished by the temperature collecting component. The interval duration determining module is configured to determine an interval duration for obtaining the first temperature according to the resolution and the temperature rise rate. The obtaining module 901 is further configured to obtain the first temperature of the phase change material layer collected by the temperature collecting component according to the interval duration.

[0137] Optionally, the temperature regulating component includes multiple temperature acquisition elements and multiple heating elements; along the first direction, the phase change material layer has a first surface and a second surface; wherein the orthographic projections of the multiple temperature acquisition elements on the first surface do not overlap, and the orthographic projections of the multiple heating elements on the second surface do not overlap; the heating elements correspond one-to-one with the temperature acquisition elements; and the acquisition module 901 is further configured to: acquire a first temperature at different locations in the phase change material layer from the multiple temperature acquisition elements respectively; and the determination module 902 is further configured to: for the first temperature of each temperature acquisition element, if the first temperature is less than the target temperature, determine the heating power of the heating element corresponding to that temperature acquisition element.

[0138] Optionally, the device further includes a correction module, which is used to: after acquiring the first temperature of the phase change material layer acquired by the temperature acquisition device, correct the first temperature according to a calibrated correction relationship; wherein the correction relationship is calibrated based on the actual temperature of the sample battery cell and the first temperature of the sample phase change material layer.

[0139] It should be noted that those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the temperature regulating device described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0140] Based on the same inventive concept, this application provides a temperature regulating device for regulating the temperature of the aforementioned battery device. Please refer to [link to relevant documentation]. Figure 10 The temperature regulation device may include a data acquisition circuit board 7 and a controller 8.

[0141] The acquisition circuit board 7 is connected to the temperature acquisition device and is used to acquire the first temperature of the phase change material layer 4 acquired by the temperature acquisition device. The acquisition circuit board 7 can be, for example, a flexible circuit board, which can be connected to the temperature acquisition device 5 via a wire.

[0142] The controller 8 described above can be located outside the battery device. It can obtain the first temperature from the acquisition circuit board 7, and determine the heating power when the first temperature is lower than the target temperature. The target temperature is the temperature at which the phase change material in the phase change material layer 4 is in a solid-liquid miscible state. It can also send a heating command to the heating element 6, the heating command including the heating power.

[0143] It is understood that the controller 8 can execute the method steps in any of the aforementioned implementation methods. The implementation process and the technical effects achieved can be referred to the corresponding parts above, and will not be repeated here.

[0144] Based on the same inventive concept, the application further provides a vehicle comprising the battery device, the acquisition circuit board and the battery management system as described above; the acquisition circuit board is connected with the temperature acquisition component and is configured to acquire the first temperature of the phase change material layer acquired by the temperature acquisition component; and the battery management system is in communication connection with the acquisition circuit board and is configured to execute the temperature adjustment method.

[0145] It should be noted that the implementation process of the temperature adjustment method executed by the battery management system and the technical effects achieved thereby can be the same as or similar to those of the temperature adjustment method executed by the controller as described above, and thus will not be described herein.

[0146] Based on the same inventive concept, the application further provides an electronic device comprising a processor and a memory, wherein the memory stores computer readable instructions, and when the computer readable instructions are executed by the processor, the method provided in each of the method embodiments described above is executed.

[0147] Based on the same inventive concept, the application further provides a computer readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method provided in each of the method embodiments described above can be executed.

[0148] Based on the same inventive concept, the application further provides a computer program product, which comprises a computer program stored on a non-transitory computer readable storage medium, and the computer program comprises program instructions, and when the program instructions are executed by a computer, the computer can execute the method provided in each of the method embodiments described above.

[0149] In the embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0150] In addition, the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e. can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments of the present application.

[0151] Further, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0152] The above merely provides an example of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a battery cell; a temperature adjusting member arranged side by side with the battery cell; the temperature adjusting member comprises: a phase change material layer; a temperature collecting member for collecting temperature information of the phase change material layer; a heating member for heating the phase change material layer according to received heating instructions; the heating instructions are generated based on the temperature information of the phase change material layer; the battery cell and the temperature adjusting member are arranged along a first direction; the temperature collecting member, the phase change material layer and the heating member are arranged along the first direction; at least one phase change material layer is arranged between the temperature collecting member and the heating member along the first direction; the temperature adjusting member comprises a plurality of phase change material layers arranged along the first direction; and the temperature collecting member is arranged between two adjacent phase change material layers along the first direction; the heating member is arranged between two adjacent phase change material layers along the first direction.

2. The battery device of claim 1, wherein The plurality of phase change material layers comprises a first material layer, a second material layer and a third material layer; wherein the second material layer is arranged between the first material layer and the third material layer along the first direction; the temperature collecting member is arranged between the first material layer and the second material layer, and the heating member is arranged between the second material layer and the third material layer.

3. The battery device of claim 1, wherein The temperature adjusting member comprises a plurality of phase change material layers arranged in sequence along the first direction, and the plurality of phase change material layers are arranged between the temperature collecting member and the heating member.

4. The battery device according to any one of claims 1 to 3, characterized by, The temperature adjusting member comprises a plurality of temperature collecting members; the phase change material layer has a first surface along the first direction; wherein the projections of the plurality of temperature collecting members on the first surface do not overlap.

5. The battery device of claim 4, wherein The plurality of temperature collecting members are arranged in an array on the first surface.

6. The battery device according to any one of claims 1 to 3, wherein The temperature adjusting member comprises a plurality of heating members; the phase change material layer has a second surface along the first direction; wherein the projections of the plurality of heating members on the second surface do not overlap.

7. The battery device of claim 6, wherein The plurality of heating members are arranged in an array on the second surface.

8. The battery device according to any one of claims 1 to 3, wherein The temperature adjusting member comprises a plurality of temperature collecting members and a plurality of heating members; the phase change material layer has a first surface and a second surface along the first direction; wherein the projections of the plurality of temperature collecting members on the first surface do not overlap, and the projections of the plurality of heating members on the second surface do not overlap; the heating member corresponds to the temperature collecting member one by one.

9. The battery device according to any one of claims 1 to 3, 5, 7, characterized by, The battery device further comprises a connecting member for connecting the temperature adjusting member and the battery cell.

10. The battery device of claim 9, wherein, The connecting member comprises a silica gel suction cup; the temperature adjusting member is adsorbed to the side of the battery cell through the silica gel suction cup.

11. The battery device according to any one of claims 1 to 3, 5, 7, 10, characterized by, The phase change material layer comprises gallium-indium eutectic alloy and sodium sulfate hydrate.

12. The battery device according to any one of claims 1 to 3, 5, 7, 10, characterized by, The battery device comprises a plurality of battery cells arranged along a first direction, and the temperature adjusting member is arranged between two adjacent battery cells.

13. A temperature adjustment method, characterized by, A method for adjusting the temperature of the battery device as claimed in any one of claims 1-12, the method comprising: obtaining a first temperature of the phase change material layer collected by the temperature collecting member; determining a heating power in a case that the first temperature is less than a target temperature; the target temperature being a temperature at which a phase change material in the phase change material layer is in a solid-liquid miscible state; sending a heating instruction to the heating element, the heating instruction including the heating power.

14. The method of claim 13, wherein, the target temperature is a temperature range; and determining a heating power in a case that the first temperature is less than a target temperature, including: determining the heating power in a case that the first temperature is less than a lower limit value of the temperature range.

15. The method of claim 14, wherein, before determining the heating power in a case that the first temperature is less than a lower limit value of the temperature range, the method further includes: obtaining a temperature rise rate of the battery cell; determining the temperature range according to the temperature rise rate of the battery cell; wherein interval values of the temperature range are negatively correlated with the temperature rise rate.

16. The method of claim 14, wherein, the battery device includes a plurality of battery cells arranged along a first direction, and the temperature adjusting element is arranged between adjacent two battery cells, and before determining the heating power in a case that the first temperature is less than a lower limit value of the temperature range, the method further includes: obtaining a temperature rise rate of each of a plurality of battery cells; for each of the battery cells, determining a temperature range corresponding to the battery cell according to a temperature rise rate of the battery cell; wherein interval values of the temperature range are negatively correlated with the temperature rise rate of the battery cell; and determining a heating power in a case that the first temperature is less than a target temperature, including: for each of the battery cells, determining a heating power for the battery cell in a case that a first temperature of a temperature adjusting element arranged adjacent to the battery cell is less than a lower limit value of a temperature range corresponding to the battery cell.

17. The method of claim 13, wherein, before obtaining the first temperature of the phase change material layer collected by the temperature collecting element, the method further includes: obtaining a resolution of the temperature collecting element and a temperature rise rate of the battery cell; the resolution representing a minimum temperature change amount that can be distinguished by the temperature collecting element; determining an interval duration for obtaining the first temperature according to the resolution and the temperature rise rate; and the obtaining the first temperature of the phase change material layer collected by the temperature collecting element includes: obtaining the first temperature of the phase change material layer collected by the temperature collecting element according to the interval duration.

18. The method according to any one of claims 13-15, characterized by, the temperature adjusting element includes a plurality of temperature collecting elements and a plurality of heating elements; along a first direction, the phase change material layer has a first surface and a second surface; wherein projections of the plurality of temperature collecting elements on the first surface do not overlap, and projections of the plurality of heating elements on the second surface do not overlap; the heating element and the temperature collecting element correspond to each other; and the obtaining the first temperature of the phase change material layer collected by the temperature collecting element includes: obtaining the first temperature at different positions in the phase change material layer from the plurality of temperature collecting elements, respectively; and determining a heating power in a case that the first temperature is less than a target temperature, including: For each first temperature of the temperature acquisition component, if the first temperature is less than the target temperature, a heating power of a heating component corresponding to the temperature acquisition component is determined.

19. The method according to any one of claims 13-15, characterized in that, After the first temperature of the phase change material layer collected by the temperature acquisition component is obtained, the method further comprises: correcting the first temperature according to a calibrated correction relationship; wherein the correction relationship is calibrated based on an actual temperature of a sample battery cell and the first temperature of the sample phase change material layer.

20. A vehicle characterized by comprising: comprise: The battery device of any one of claims 1-12; a collection circuit board connected with the temperature acquisition component, configured to obtain the first temperature of the phase change material layer collected by the temperature acquisition component; a battery management system in communication connection with the collection circuit board, configured to execute the temperature regulation method of any one of claims 13-19.

21. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by a processor to run the method of any one of claims 13-19.

22. A computer program product comprising computer programs or instructions, characterized in that, The computer program or instructions are executed by a processor to run the method of any one of claims 13-19.

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