Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, and belongs to the technical field of batteries. The battery device comprises a box body; the plurality of single batteries are arranged in the box body, and each single battery is provided with a pole; the at least one temperature equalizing piece is arranged in the box body; the phase change energy storage structure is arranged in the box body; wherein the pole columns of at least two battery monomers are in insulated connection with the same temperature equalizing piece, and the temperature equalizing piece is used for transferring heat among the pole columns connected with the temperature equalizing piece; the phase change energy storage structure is in heat conduction connection with the temperature equalizing part, and the phase change energy storage structure is used for absorbing heat of the temperature equalizing part. According to the battery device, the temperature between the poles of the different battery monomers can be balanced through the temperature equalizing part, and the heat of the temperature equalizing part can be absorbed through the phase change energy storage structure when the temperature of the temperature equalizing part is too high.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery device technology is an important factor related to their development.

[0003] However, during the use of the battery device, due to the individual differences of the battery cells, the temperature of the poles of different battery cells will also be different, and the temperature difference between the battery cells will lead to differences in the life and performance of the battery cells, thereby affecting the performance and life of the entire battery device. Therefore, how to improve the service life of the battery device is a technical problem that needs to be solved in the battery device technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical equipment to balance the temperature between the poles, thereby increasing the service life of the battery device.

[0005] In a first aspect, the present application provides a battery device, comprising:

[0006] Box;

[0007] A plurality of battery cells are arranged in the box, and each of the battery cells is provided with a pole;

[0008] At least one temperature-averaging component is disposed in the box; and

[0009] A phase-change energy storage structure is disposed in the box;

[0010] Among them, the poles of at least two of the battery cells are insulated and connected to the same temperature equalizing element, and the temperature equalizing element is used to transfer heat between the poles connected thereto; the phase change energy storage structure is thermally connected to the temperature equalizing element, and the phase change energy storage structure is used to absorb the heat of the temperature equalizing element.

[0011] In the technical solution of the embodiment of the present application, the poles of different battery cells are insulated and connected to the same temperature equalizer, so that heat can be transferred between the poles of different battery cells through the temperature equalizer, so that the heat of the pole with higher temperature is transferred from the temperature equalizer to the pole with lower temperature, and the temperature between the poles of different battery cells is balanced, so that the pole temperatures of different battery cells are at a similar temperature level, thereby improving the service life of the battery device. At the same time, due to the setting of the phase change energy storage structure, the heat of the temperature equalizer can be absorbed when the temperature of the temperature equalizer is too high, so as to reduce the occurrence of the phenomenon that the service life of the battery device is reduced due to excessive local temperature.

[0012] In some embodiments, the temperature-averaging component includes a first shell and a capillary structure, the first shell is provided with a temperature-averaging cavity, and the temperature-averaging cavity is filled with a temperature-averaging medium;

[0013] The capillary structure is arranged in the temperature-averaging cavity.

[0014] The temperature-averaging medium in the temperature-averaging chamber flows between the capillary structures to transfer high temperature to low temperature, so that the heat of the higher temperature pole is transferred from the temperature-averaging component to the lower temperature pole, thereby balancing the temperature between the poles of different battery cells.

[0015] In some embodiments, the temperature equalizing element is a heat pipe.

[0016] The temperature equalizing element is made of a heat pipe, so that the structure of the heat pipe itself can be utilized to achieve the effect of equalizing the temperature between the poles.

[0017] In some embodiments, the phase-change energy storage structure includes a second shell, the second shell is provided with an energy storage cavity, and the energy storage cavity is filled with a phase-change material.

[0018] The cooling effect on the temperature-averaging component is achieved through the phase change of the phase change material in the energy storage cavity at high temperature.

[0019] In some embodiments, each of the battery cells is provided with a first pole and a second pole;

[0020] The plurality of battery cells are arranged in at least one row, the first poles of the battery cells in the same row are arranged in one row, and the second poles of the battery cells in the same row are arranged in one row;

[0021] The battery device further includes a first busbar and a second busbar, wherein the first busbar is connected to the first pole, and the second busbar is connected to the second pole;

[0022] The temperature-averaging element comprises a first temperature-averaging element and a second temperature-averaging element;

[0023] The same first temperature-averaging component is insulated and connected to at least two of the first current collectors, and the same second temperature-averaging component is insulated and connected to at least two of the second current collectors.

[0024] By arranging the first poles of the battery cells in the same column into a row, connecting the first busbar with the first poles, and making the same first temperature-averaging component insulated from at least two first busbars, heat can be transferred between different first busbars through the first temperature-averaging component, and then heat can be transferred between different first poles, and the temperature between the first poles of different battery cells can be balanced. Similarly, by arranging the second poles of the battery cells in the same column into a row, connecting the second busbar with the second poles, and making the same second temperature-averaging component insulated from at least two second busbars, heat can be transferred between different second busbars through the second temperature-averaging component, and then heat can be transferred between different second poles, and the temperature between the second poles of different battery cells can be balanced.

[0025] In some embodiments, the first temperature-averaging member is located on a side of the first current collector facing away from the first pole, and the second temperature-averaging member is located on a side of the second current collector facing away from the second pole.

[0026] The first and second temperature averaging members are positioned on the battery device by arranging the first temperature averaging member on the side of the first current collector facing away from the first pole and arranging the second temperature averaging member on the side of the second current collector facing away from the second pole.

[0027] In some embodiments, a plurality of the temperature-averaging components are provided, and the plurality of the temperature-averaging components are connected in series or in parallel.

[0028] When multiple temperature-averaging components are provided, the multiple temperature-averaging components can be connected in series or in parallel to each other, so as to be integrated into one temperature-averaging component, which can reduce the number of parts of the battery device and achieve temperature uniformity between more poles through one temperature-averaging component.

[0029] In some embodiments, the phase change energy storage structure is thermally connected to the box.

[0030] By thermally connecting the phase change energy storage structure to the box, the heat of the phase change energy storage structure can be transferred to the box, and then the heat can be dissipated into the outside air through the box.

[0031] In some embodiments, the battery device further includes a thermal management component, the thermal management component is disposed in the housing, and the phase change energy storage structure is thermally connected to the thermal management component.

[0032] By arranging a thermal management component in the box and thermally connecting the phase change energy storage structure with the thermal management component, the heat of the phase change energy storage structure can be transferred to the thermal management component, and then the heat is dissipated through the thermal management component.

[0033] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiment.

[0034] The electrical equipment provided in the present application includes the battery device described in any one of the embodiments of the first aspect, and thus has the technical effects described in any one of the embodiments above, which will not be described in detail herein.

[0035] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0037] Figure 1 A schematic diagram of the structure of a vehicle in some embodiments of the present application;

[0038] Figure 2 is a schematic diagram of the exploded structure of a battery device in some embodiments of the present application;

[0039] Figure 3 A schematic diagram of the exploded structure of a battery cell in some embodiments of the present application;

[0040] Figure 4 It is a schematic diagram of assembling a temperature balancing member and a battery cell in a battery device in some embodiments of the present application;

[0041] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0042] Figure 6 Schematic diagram of the assembly of the phase change energy storage structure and the box in the battery device in some embodiments of the present application

[0043] Figure 7 This is a schematic diagram of the structure of a temperature equalizing member in a battery device in some embodiments of the present application;

[0044] Figure 8 Schematic diagram of the exploded structure of the battery device in some other embodiments of the present application.

[0045] The reference numerals in the specific implementation manner are as follows:

[0046] 1000. Vehicles;

[0047] 100, battery device; 200, controller; 300, motor;

[0048] 10. Box body; 11. First part; 12. Second part;

[0049] 20. Battery cell; 21. End cover; 22. Shell; 23. Cell assembly; 24. Post; 24a. First post; 24b. Second post;

[0050] 30, temperature-averaging element; 30a, first temperature-averaging element; 30b, second temperature-averaging element; 31, first housing; 311, temperature-averaging chamber; 32, liquid-absorbing core;

[0051] 40. Phase change energy storage structure;

[0052] 50. A first busbar;

[0053] 60. Second busbar;

[0054] 70. Thermal management components. DETAILED DESCRIPTION

[0055] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0057] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0058] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0060] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0061] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0062] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0063] At the same time, with the rapid development of new energy vehicles, the market share of new energy vehicles is getting higher and higher. How to quickly and efficiently achieve energy replenishment is an urgent problem to be solved in the new energy vehicle industry. As a mainstream solution for new energy vehicles to achieve rapid energy replenishment, power battery fast charging has encountered many challenges in the implementation process.

[0064] First of all, the battery cells of the power battery will generate a lot of heat at the pole during the fast charging process, which will cause the local temperature of the battery to rise sharply, and then seriously affect the performance and service life of the battery, and even cause major safety hazards during the use of the battery, which is not conducive to the safety of consumers.

[0065] Secondly, the rapid discharge of the power battery in high-performance mode will also cause the temperature of the battery cell pole to rise rapidly. Due to the individual differences of the battery cells, the temperature of the poles of different battery cells will also be different, and the temperature difference between battery cells will lead to differences in the life and performance of the battery cells, thus affecting the performance and life of the entire power battery.

[0066] In order to reduce the temperature difference between battery cells, research has found that a temperature equalization structure can be set between battery cells to balance the temperature between battery cells, so that different battery cells are at a similar temperature level, thereby improving the performance and service life of the power battery.

[0067] Based on the above considerations, in order to solve the problem that the performance and life of the battery device are reduced due to the temperature difference between the battery cell poles during use, a battery cell is designed, and the poles of different battery cells are insulated and connected to the same temperature equalizer, so that heat can be transferred between the poles of different battery cells through the temperature equalizer, so that the heat of the higher temperature pole is transferred from the temperature equalizer to the lower temperature pole, and the temperature between the poles of different battery cells is balanced, so that the pole temperatures of different battery cells are at a similar temperature level, thereby improving the service life of the battery device. At the same time, a phase change energy storage structure connected to the temperature equalizer is set to absorb the heat of the temperature equalizer when the temperature of the temperature equalizer is too high, so as to reduce the occurrence of the phenomenon that the service life of the battery device is reduced due to excessive local temperature.

[0068] The battery device disclosed in the embodiment of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships or aircraft. The power supply system of the electrical equipment can be composed of the battery device disclosed in the present application.

[0069] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc.

[0070] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0071] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used for powering the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000, or, may be used for the circuit system of the vehicle 1000, for example, for the working power requirements during the startup, navigation and operation of the vehicle 1000.

[0072] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0073] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0074] Please refer to Figure 2 , Figure 2 The exploded view of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is accommodated in the box body 10. The box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 can adopt a variety of structures.

[0075] In some embodiments, the box body 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 jointly define a storage space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end open, and the first portion 11 may be a plate-like structure, the first portion 11 covers the open side of the second portion 12, so that the first portion 11 and the second portion 12 jointly define a storage space; the first portion 11 and the second portion 12 may also be hollow structures with one side open, and the open side of the first portion 11 covers the open side of the second portion 12. Of course, the box body 10 formed by the first portion 11 and the second portion 12 may be in various shapes, such as a cylinder, a cuboid, etc.

[0076] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures. For example, the battery device 100 may also include a converging component (such as Figure 5 The first busbar 50 and the second busbar 60 shown in FIG. 1 are used to realize electrical connection between multiple battery cells 20 .

[0077] Each battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0078] Please refer to Figure 3 , Figure 3 The following is a schematic diagram of the exploded structure of a battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery device. Figure 3 The battery cell 20 includes an end cover 21, a shell 22, a battery cell assembly 23 and other functional components.

[0079] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as poles 24 can be provided on the end cap 21. The pole 24 can be used to be electrically connected to the battery cell assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0080] The shell 22 is a component used to cooperate with the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the battery cell assembly 23, electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cover 21 at the opening. Without limitation, the end cover 21 and the shell 22 can also be integrated. Specifically, the end cover 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cover 21 covers the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the battery cell assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0081] The battery cell assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more battery cell assemblies 23 may be contained in the housing 22. The battery cell assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the battery cell assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0082] According to some embodiments of the present application, referring to Figure 2 , and please refer to Figures 4 to 8 , Figure 4 and Figure 5 Schematic diagram of the assembly of a temperature equalizing member and a battery cell in a battery device according to some embodiments of the present application. Figure 6 It is a schematic diagram of assembling a phase change energy storage structure and a box in a battery device in some embodiments of the present application; Figure 7 Schematic diagram of the structure of a temperature equalizing element in a battery device according to some embodiments of the present application.

[0083] The present application provides a battery device 100. The battery device 100 includes a housing 10, a plurality of battery cells 20, at least one temperature equalizing member 30, and a phase change energy storage structure 40. The plurality of battery cells 20 are disposed in the housing 10, each battery cell 20 is provided with a pole 24, and at least one temperature equalizing member 30 is disposed in the housing 10.

[0084] The poles 24 of at least two battery cells 20 are insulated and connected to the same temperature equalizer 30, and the temperature equalizer 30 is used to transfer heat between the poles 24 connected thereto. The phase change energy storage structure 40 is thermally connected to the temperature equalizer 30, and the phase change energy storage structure 40 is used to absorb the heat of the temperature equalizer 30.

[0085] The “insulated connection” can be achieved by spraying an insulating coating on the outer surface of the temperature-equalizing member 30. Alternatively, an insulating heat-conducting member can be provided between the temperature-equalizing member 30 and the pole 24, which can both insulate the two parts and effectively transfer the heat of the pole 24 to the temperature-equalizing member 30.

[0086] In the technical solution of the embodiment of the present application, the poles 24 of different battery cells 20 are insulated and connected to the same temperature equalizer 30, so that heat can be transferred between the poles 24 of different battery cells 20 through the temperature equalizer 30, so that the heat of the higher temperature pole 24 is transferred from the temperature equalizer 30 to the lower temperature pole 24, and the temperature between the poles 24 of different battery cells 20 is balanced, so that the temperature of the poles 24 of different battery cells 20 is at a similar temperature level, thereby improving the service life of the battery device. At the same time, since the pole 24 and the temperature equalizer 30 are insulated, the occurrence of short circuit can be reduced. In addition, due to the setting of the phase change energy storage structure 40, the heat of the temperature equalizer 30 can be absorbed when the temperature of the temperature equalizer 30 is too high, so as to reduce the occurrence of the phenomenon that the service life of the battery device 100 is reduced due to excessive local temperature.

[0087] According to some embodiments of the present application, optionally, please continue to refer to Figure 7 The temperature equalizing element 30 includes a first shell 31 and a liquid wick 32. The first shell 31 is provided with a temperature equalizing chamber 311, and the temperature equalizing chamber 311 is filled with a temperature equalizing medium. The liquid wick 32 is provided in the first shell 31 and in the temperature equalizing chamber 311, and the liquid wick 32 is provided with a capillary structure.

[0088] The main function of the capillary structure is to transfer liquid through capillary action. Metal capillary structure or ceramic capillary structure can be selected. When the metal capillary structure is selected, it is usually made of metal wire sintered at high temperature and then laser cut, and then oxidized and corroded with chemical reagents to obtain better capillary ability and hydrophilicity; when the ceramic capillary structure is selected, it is generally made of quartz and clay particles calcined.

[0089] The temperature-equalizing medium can be alcohol or a refrigerant. When the temperature at a certain pole 24 is high, the temperature-equalizing medium there will be heated and undergo a liquid-gas phase change to form a gaseous medium. Under the action of the pressure difference, the gaseous medium diffuses to a location with a lower temperature and condenses to undergo a gas-liquid phase change to form a liquid medium. The condensed liquid medium will flow along the capillary structure of the liquid wick 32 to the place where the vaporization occurs, thereby achieving cooling of the pole 24 with a higher temperature, and at the same time achieving heat transfer between the poles 24 of different battery cells 20.

[0090] The phase change and flow of the temperature-equalizing medium in the temperature-equalizing chamber 311 transfer the high temperature to the low temperature, and then the heat of the higher temperature pole 24 is transferred from the temperature-equalizing element 30 to the lower temperature pole 24 , thereby balancing the temperatures of the poles 24 of different battery cells 20 .

[0091] According to some embodiments of the present application, optionally, please continue to refer to Figure 2 , Figure 4 , Figure 5 and Figure 7 , the temperature equalizing element 30 is a heat pipe.

[0092] The interior of the heat pipe is generally provided with an evaporation section and a condensation section, wherein the evaporation section is the part where the medium is heated and vaporized, and the condensation section is the part where the vaporized medium condenses and releases heat. When the evaporation section is heated, the liquid medium absorbs heat and evaporates into a gaseous state, and the vaporized medium flows to the condensation section under the action of the pressure difference. In the condensation section, the vaporized medium releases latent heat and condenses into a liquid state, and the liquid medium flows back to the evaporation section through capillary action or gravity. Through the continuous circulation between the evaporation section and the condensation section, efficient heat transfer is achieved.

[0093] The temperature-equalizing member 30 is made of a heat pipe, so that the structure of the heat pipe itself can be utilized to achieve the effect of temperature uniformity among the poles 24 .

[0094] According to some embodiments of the present application, optionally, the phase-change energy storage structure 40 includes a second shell, the second shell is provided with an energy storage cavity, and the energy storage cavity is filled with a phase-change material.

[0095] The phase change material is in a solid state at room temperature, which is the state before reaching a preset high temperature (e.g., 40° or 50°). When the temperature at a certain location of a certain temperature-equalizing element 30 reaches a preset high temperature, the phase change material at that location will be heated and undergo a solid-liquid phase change, and while undergoing the phase change, it will absorb the high temperature at that location to achieve cooling.

[0096] The cooling effect on the temperature equalizing element 30 is achieved through the phase change of the phase change material in the energy storage cavity 411 at high temperature.

[0097] According to some embodiments of the present application, optionally, please continue to refer to Figure 4 and Figure 5Each battery cell 20 is provided with two poles 24. For easy distinction, the two poles 24 of the same battery cell 20 can be marked as a first pole 24a and a second pole 24b, respectively. One of the first pole 24a and the second pole 24b is a positive pole, and the other is a negative pole.

[0098] The plurality of battery cells 20 are arranged in at least one row, the first poles 24 a of the battery cells 20 in the same row are arranged in one row, and the second poles 24 b of the battery cells 20 in the same row are arranged in one row.

[0099] The battery device 100 further includes a first busbar 50 and a second busbar 60 . The first busbar 50 is connected to the first pole 24 a , and the second busbar 60 is connected to the second pole 24 b .

[0100] The temperature-uniform component 30 includes a first temperature-uniform component 30 a and a second temperature-uniform component 30 b .

[0101] The same first temperature-averaging component 30 a is insulated and connected to at least two first current collectors 50 , and the same second temperature-averaging component 30 b is insulated and connected to at least two second current collectors 60 .

[0102] By arranging the first poles 24a of the battery cells 20 in the same column into a row, the first busbar 50 is connected to the first poles 24a, and the same first temperature-averaging member 30a is insulated and connected to at least two first busbars 50, so that heat can be transferred between different first busbars 50 through the first temperature-averaging member 30a, and then heat can be transferred between different first poles 24a, and the temperature between the first poles 24a of different battery cells 20 can be balanced. Similarly, by arranging the second poles 24b of the battery cells 20 in the same column into a row, the second busbar 60 is connected to the second poles 24b, and the same second temperature-averaging member 30b is insulated and connected to at least two second busbars 60, heat can be transferred between different second busbars 60 through the second temperature-averaging member 30b, and then heat can be transferred between different second poles 24b, and the temperature between the second poles 24b of different battery cells 20 can be balanced.

[0103] According to some embodiments of the present application, optionally, please continue to refer to Figure 4 and Figure 5 The first temperature-averaging member 30a is located on a side of the first current collector 50 facing away from the first pole 24a, and the second temperature-averaging member 30b is located on a side of the second current collector 60 facing away from the second pole 24b.

[0104] The first temperature equalizing member 30a and the second temperature equalizing member 30b are positioned on the battery device 100 by disposing the first temperature equalizing member 30a on the side of the first current collector 50 facing away from the first pole 24a and disposing the second temperature equalizing member 30b on the side of the second current collector 60 facing away from the second pole 24b.

[0105] According to some embodiments of the present application, optionally, a plurality of temperature-averaging elements 30 are provided, and the plurality of temperature-averaging elements 30 are connected in series or in parallel with each other.

[0106] When multiple temperature equalizing components 30 are provided, the multiple temperature equalizing components 30 can be connected in series or in parallel to each other to integrate the multiple temperature equalizing components 30 into one temperature equalizing component, which can reduce the number of parts of the battery device and achieve temperature equalization between more poles 24 through one temperature equalizing component.

[0107] According to some embodiments of the present application, optionally, please continue to refer to Figure 2 As shown in the figure, the phase change energy storage structure 40 is thermally connected to the box body 10.

[0108] “The phase-change energy storage structure 40 is thermally connected to the housing 10 ” means that while the phase-change energy storage structure 40 is connected to the housing 10 , heat can be transferred between the two.

[0109] By thermally connecting the phase change energy storage structure 40 to the housing 10 , the heat of the phase change energy storage structure 40 can be transferred to the housing 10 , and then the heat is dissipated into the outside air through the housing 10 .

[0110] According to some embodiments of the present application, optionally, please continue to refer to Figure 8 The battery device 100 further includes a thermal management component 70 , which is disposed in the box body 10 , and the phase change energy storage structure 40 is thermally connected to the thermal management component 70 .

[0111] The thermal management component 70 may be a water cooling plate.

[0112] “The phase-change energy storage structure 40 is thermally connected to the thermal management component 70 ” means that while the phase-change energy storage structure 40 is connected to the thermal management component 70 , heat can also be transferred between the two.

[0113] By arranging a thermal management component 70 in the housing 10 and thermally connecting the phase change energy storage structure 40 to the thermal management component 70 , the heat of the phase change energy storage structure 40 can be transferred to the thermal management component 70 , and then the heat is dissipated through the thermal management component 70 .

[0114] According to some embodiments of the present application, the present application further provides an electrical device, comprising a battery according to any of the above schemes, and the battery is used to provide electrical energy to the electrical device.

[0115] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0116] According to some embodiments of the present application, see Figure 2 , Figure 4 and Figure 5The present application provides a battery device 100, wherein a box 10 includes a plurality of battery cells 20, wherein the plurality of battery cells 20 are arranged in multiple rows and columns, and the first poles 24a of the battery cells 20 in the same column are arranged in a column, and the second poles 24b of the battery cells 20 in the same column are arranged in a column. Each first pole 24a is respectively connected to a first bus 50, and the first bus 50 connected to each first pole 24a is arranged in a column, and each second pole 24b is respectively connected to a second bus 60, and the second bus 60 connected to each second pole 24b is arranged in a column.

[0117] The first current collector 50 in the same column is insulated and connected to the same first temperature-averaging component 30 a , and the second current collector 60 in the same column is insulated and connected to the same second temperature-averaging component 30 b .

[0118] Each of the first temperature-averaging components 30 a and each of the second temperature-averaging components 30 b is thermally connected to the phase-change energy storage structure 40 , and the phase-change energy storage structure 40 is thermally connected to the first portion 11 of the box body 10 .

[0119] When the heat of the first pole 24a of one of the battery cells 20 is high, the heat can be transferred to other first poles 24a with lower temperatures in the same row through the first temperature equalizing member 30a insulated and connected thereto, so as to balance the temperature among the first poles 24a in the same row. At the same time, each first temperature equalizing member 30a can also be cooled by the phase change energy storage structure 40.

[0120] When the heat of the second pole 24b of one of the battery cells 20 is high, the heat can be transferred to other second poles 24b with lower temperatures in the same row through the second temperature equalizing member 30b insulated and connected thereto, so as to balance the temperature among the second poles 24b in the same row. At the same time, each second temperature equalizing member 30b can also be cooled by the phase change energy storage structure 40.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Box; A plurality of battery cells are arranged in the box, and each of the battery cells is provided with a pole; At least one temperature-averaging component is disposed in the box; as well as A phase-change energy storage structure is disposed in the box; Among them, the poles of at least two of the battery cells are insulated and connected to the same temperature equalizing element, and the temperature equalizing element is used to transfer heat between the poles connected thereto; the phase change energy storage structure is thermally connected to the temperature equalizing element, and the phase change energy storage structure is used to absorb the heat of the temperature equalizing element.

2. The battery device according to claim 1, characterized in that: The temperature-averaging component comprises a first shell and a capillary structure, wherein the first shell is provided with a temperature-averaging cavity, and the temperature-averaging cavity is filled with a temperature-averaging medium; The capillary structure is arranged in the temperature-averaging cavity.

3. The battery device according to claim 2, characterized in that: The temperature equalizing element is a heat pipe.

4. The battery device according to claim 1, characterized in that: The phase-change energy storage structure comprises a second shell, the second shell is provided with an energy storage cavity, and the energy storage cavity is filled with a phase-change material.

5. The battery device according to claim 1, characterized in that: Each of the battery cells is provided with a first pole and a second pole; The plurality of battery cells are arranged in at least one row, the first poles of the battery cells in the same row are arranged in one row, and the second poles of the battery cells in the same row are arranged in one row; The battery device further includes a first busbar and a second busbar, wherein the first busbar is connected to the first pole, and the second busbar is connected to the second pole; The temperature-averaging element comprises a first temperature-averaging element and a second temperature-averaging element; The same first temperature-averaging component is insulated and connected to at least two of the first current collectors, and the same second temperature-averaging component is insulated and connected to at least two of the second current collectors.

6. The battery device according to claim 5, characterized in that: The first temperature-averaging component is located on a side of the first current collector facing away from the first pole, and the second temperature-averaging component is located on a side of the second current collector facing away from the second pole.

7. The battery device according to any one of claims 1 to 6, characterized in that: A plurality of the temperature-averaging components are provided, and the plurality of the temperature-averaging components are connected in series or in parallel.

8. The battery device according to any one of claims 1 to 6, characterized in that: The phase change energy storage structure is thermally connected to the box.

9. The battery device according to any one of claims 1 to 6, characterized in that: The battery device further comprises a heat management component, which is disposed in the box, and the phase change energy storage structure is thermally connected to the heat management component.

10. An electrical device, characterized in that: A battery device comprising the battery device as claimed in any one of claims 1 to 9.

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