Battery device and electric appliance

Abstract

The application relates to a battery device and an electric device, the battery device comprising a box body with a containing space, a plurality of battery monomers arranged in the containing space, and a separation assembly arranged between every two adjacent battery monomers along a preset direction and in surface contact with the two adjacent battery monomers. The separation assembly comprises a separation piece and a heat exchange piece, the heat exchange piece is arranged around the outer contour of the separation piece, the heat exchange piece is internally formed with a heat exchange channel for circulating flow of a heat exchange medium, and the separation piece is provided with a giving window penetrating along the preset direction. The separation piece can provide an expansion space for the battery monomers, meanwhile, the heat exchange piece can realize heat exchange of the two adjacent battery monomers without occupying additional installation space, and the energy density of the battery device can be effectively improved. That is to say, through arrangement of the separation assembly, the energy density of the battery device and the heat dissipation effect of the battery monomers can be simultaneously improved.

Description

Technical Field

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

[0002] A single battery cell is the smallest unit that makes up a battery device. During cycling, a single battery cell generates heat and gas inside. Therefore, a heat exchange structure is usually installed inside the battery device to exchange heat between the battery cells. At the same time, battery cells are prone to expansion and deformation under the influence of internal gas, so a certain amount of expansion space needs to be provided between the battery cells.

[0003] However, the energy density requirements for battery devices are becoming increasingly higher, and heat dissipation of individual battery cells is becoming increasingly difficult. Therefore, how to balance improving the energy density of battery devices with improving the heat dissipation of individual battery cells is very important for current battery device structures. Utility Model Content

[0004] Therefore, it is necessary to provide a battery device and electrical equipment that can simultaneously improve the energy density of the battery device and the heat dissipation effect of the individual battery cells, in order to address the above problems.

[0005] In a first aspect, this application provides a battery device, including a housing, a plurality of battery cells, and a separator assembly. The housing has a receiving space; the plurality of battery cells are disposed within the receiving space; the separator assembly is disposed between each pair of adjacent battery cells along a predetermined direction and contacts the surfaces of the battery cells on adjacent sides; the separator assembly includes a separator and a heat exchanger, the heat exchanger being disposed around the outer periphery of the outer contour of the separator, a heat exchange channel for circulating heat exchange medium is formed within the heat exchanger, and a clearance window penetrating along a predetermined direction is provided on the separator.

[0006] With the above structure, firstly, by setting a clearance window on the separator in the separator assembly, expansion space can be provided for adjacent battery cells on both sides, allowing the battery cells to circulate smoothly and improving their performance. Simultaneously, the heat exchange components in the separator assembly enable heat exchange between adjacent battery cells without occupying additional installation space, effectively increasing the energy density of the battery device. In other words, the separator assembly design can simultaneously improve both the energy density of the battery device and the heat dissipation of the battery cells.

[0007] In some embodiments, the outer periphery of the outer contour of the separator is recessed to form a groove, and the heat exchanger is engaged in the groove.

[0008] By setting grooves, a quick and stable connection can be achieved between the heat exchanger and the partition, allowing them to be better combined into a single structure.

[0009] In some embodiments, the groove sidewall is chamfered at one end of the groove opening.

[0010] In this way, when the heat exchanger is installed in the groove, it can slide smoothly into the groove along the chamfered surface of the flared opening, making the installation process smoother and improving assembly efficiency.

[0011] In some embodiments, the material of the separator is configured as an elastic insulating material.

[0012] Thus, through the above structure, the separator can not only achieve insulation separation between two adjacent battery cells, but also provide a larger expansion space for the battery cells, and enable the separator and heat exchanger to be assembled faster and better.

[0013] In some embodiments, the separator includes a first sub-component and a second sub-component that are separately arranged, the first sub-component and the second sub-component being connected end to end and enclosing to form a clearance window.

[0014] In this way, the first and second sub-components can be assembled in a detachable manner, making it easier to replace the first or second sub-component and effectively saving costs.

[0015] In some embodiments, both the first sub-component and the second sub-component include a first part and a second part that are separately disposed, one end of the first part is connected to one end of the corresponding second part, and the first part is perpendicular to the corresponding second part.

[0016] With the above structure, both the first sub-component and the second sub-component are set as separate first and second parts. This allows for better replacement of the first and second parts, further improving the maintainability and economy of the separator.

[0017] In some embodiments, a medium inlet and a medium outlet, both connected to the heat exchange channel, are respectively provided on the heat exchanger. The medium inlet and the medium outlet are arranged diagonally on the heat exchanger, and the medium inlet is located below the medium outlet along the direction of gravity.

[0018] In this way, the heat exchange medium, such as cooling water, is injected into the heat exchange channel from the medium inlet at the bottom, filling the entire heat exchange channel and finally flowing out from the medium outlet at the top. This allows the heat exchange medium to better fill the heat exchange channel, increasing the contact area between the heat exchange medium and the battery cells and improving the heat exchange efficiency.

[0019] In some embodiments, the separator is disposed between the large surfaces of every two adjacent battery cells along a preset direction and contacts the large surfaces of the adjacent battery cells.

[0020] In this way, the separator in the separator assembly can provide a certain expansion space for the large surface of the adjacent battery cells, and the heat exchanger in the separator assembly can also realize heat exchange on the large surface of the battery cells, thereby improving the heat exchange efficiency of the battery cells.

[0021] In some embodiments, the projection of the separator component falls within the large projection area of ​​the adjacent battery cell in a plane perpendicular to a preset direction.

[0022] In this way, the separator does not exceed the large surface area of ​​the battery cell in either the height or width direction, allowing the separator to be better accommodated between the large surfaces of two adjacent battery cells without occupying additional installation space, thus further improving the energy density of the battery cell.

[0023] In some embodiments, the clearance window is centered on the corresponding separator. Therefore, when the clearance window is centered on the corresponding separator and the separator is placed between the large surfaces of two adjacent battery cells, the clearance window can better correspond to the middle position of the large surface, thereby providing a larger expansion space for the battery cell.

[0024] Secondly, this application also provides an electrical device, including the battery device described above.

[0025] In the aforementioned battery device and electrical equipment, when the battery cells are arranged within the housing space, a separator assembly is installed between adjacent battery cells along a preset direction. The separator assembly has a clearance window that provides expansion space for the adjacent battery cells. Simultaneously, a heat exchanger surrounds the outer periphery of the separator assembly, and the heat exchanger has internal heat exchange channels through which a heat exchange medium is introduced. Heat exchange between the battery cells is achieved through surface contact between the separator assembly and the adjacent battery cells. This annular arrangement of the heat exchanger around the separator eliminates the need for additional installation space, achieving efficient heat exchange for each battery cell while providing expansion space, thus improving the energy density and heat dissipation efficiency of the battery device. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of a vehicle according to one or more embodiments.

[0027] Figure 2 This is an exploded structural diagram of a battery device according to one or more embodiments.

[0028] Figure 3 This is an exploded structural diagram of a battery cell according to one or more embodiments.

[0029] Figure 4This is a schematic diagram of the structure of a separator component in a battery device according to one or more embodiments.

[0030] Figure 5 This is an assembly diagram of a battery device according to one or more embodiments, showing a separator component disposed between battery cells.

[0031] Figure 6 This is a schematic diagram of the structure of a separator in a battery device according to one or more embodiments.

[0032] Figure 7 This is a schematic diagram of the structure of a first sub-component or a second sub-component in a battery device according to one or more embodiments.

[0033] Figure 8 This is a schematic diagram of the structure of a heat exchanger in a battery device according to one or more embodiments.

[0034] Figure 9 This is a schematic diagram of the assembly of the separator component and the battery cell according to one or more embodiments.

[0035] Explanation of reference numerals in the attached drawings: 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, housing; 20, battery cell; 30, separator assembly; 11, upper housing; 12, lower housing; 21, top cover; 22, shell; 23, electrode assembly; 31, separator; 32, heat exchanger; 33, clearance window; 34, groove; 311, first sub-component; 312, second sub-component; 313, first part; 314, second part; 321, medium inlet; 322, medium outlet; a, preset direction. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as other fields. With the continuous expansion of the application areas of battery devices, the market demand is also constantly increasing.

[0043] A battery device consists of one or more battery cells. For each battery device, the multiple battery cells that make up it can be connected in series, in parallel, or in a mixed configuration. Among them, a mixed configuration means that multiple battery cells are connected in both series and parallel.

[0044] A battery cell is the smallest unit that makes up a battery device. During cycling, heat and gas are generated inside the battery cell. If the temperature of the battery cell is too high, it will affect the performance of the battery cell and may even cause thermal runaway. In addition, the battery cell will expand and deform due to the influence of gas, so a certain amount of expansion space needs to be provided between the battery cells.

[0045] However, the energy density requirements for battery devices are becoming increasingly stringent, the number of individual battery cells in battery devices is gradually increasing, the internal installation space of battery devices is limited, and the design of heat dissipation structures will lead to a decrease in the energy density of battery devices.

[0046] Furthermore, since battery cells expand and deform during cycling, a certain amount of expansion space needs to be reserved between battery cells. For example, a separator structure can be set between battery cells. As a result, the energy density of the battery device is further reduced.

[0047] Based on the above considerations, and in order to address the issues of energy density and heat dissipation of individual battery cells in current battery devices, one or more embodiments of this application provide a battery device in which, when the individual battery cells are arranged within the housing space of a casing, a separator assembly is provided between adjacent battery cells along a predetermined direction. The separator assembly has a clearance window that provides expansion space for the adjacent battery cells. Simultaneously, a heat exchanger is surrounded by the outer contour of the separator assembly, and the heat exchanger has internal heat exchange channels through which a heat exchange medium is introduced. Heat exchange between the battery cells is achieved through surface contact between the separator assembly and the adjacent battery cells. In this way, by arranging the heat exchanger in a ring around the outer periphery of the separator, no additional installation space is required. This achieves efficient heat exchange for each battery cell while providing expansion space, thereby improving the energy density and heat dissipation efficiency of the battery device.

[0048] It should be noted that the battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0049] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0050] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0051] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0052] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0053] The battery devices disclosed in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft.

[0054] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0055] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0056] Please refer to Figure 1 The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0057] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0058] Please refer to Figure 2 The battery device 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20 and can have various structures. In some embodiments, the housing 10 may include an upper housing 11 and a lower housing 12, which overlap each other, collectively defining a space for accommodating the battery cell 20. The lower housing 12 may be a hollow structure with one open end, and the upper housing 11 may be a plate-like structure, covering the open side of the lower housing 12 so that the upper housing 11 and lower housing 12 together define the space. Alternatively, both the upper housing 11 and lower housing 12 may be hollow structures with one open side, with the open side of the upper housing 11 covering the open side of the lower housing 12. Of course, the box 10 formed by the upper box 11 and the lower box 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0059] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel connections. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0060] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0061] Please refer to Figure 3 A battery cell 20 refers to the smallest unit that makes up a battery. A battery cell 20 typically includes a casing, electrode assembly 23, and other functional components. The casing includes a top cover 21 and a housing 22. The top cover 21 is a component that closes onto the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the top cover 21 can be adapted to the shape of the housing 22 to fit the housing 22. Functional components such as electrode terminals, also known as terminals, can be provided on the top cover 21. The electrode terminals can be used to electrically connect to the electrode assembly 23 for outputting or inputting electrical energy into the battery cell 20. In some embodiments, the top cover 21 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. In some embodiments, an insulating member may be provided inside the top cover 21. The insulating member can be used to isolate the electrical connection components within the housing 22 from the top cover 21 to reduce the risk of short circuits. Exemplarily, the insulating member can be made of plastic, rubber, etc.

[0062] The housing 22 is a component used to cooperate with the top cover 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the top cover 21 can be independent components. An opening can be provided on the housing 22, and the top cover 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the top cover 21 and the housing 22 can be integrated. Specifically, the top cover 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the top cover 21 closes the housing 22. The housing 22 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23.

[0063] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The casing 22 may contain one or more electrode assemblies 23. Electrode assembly 23 mainly consists of a positive electrode, a separator, and a negative electrode. Specifically, positive and negative active materials are coated onto the current collector to form the positive and negative electrode, respectively. The positive and negative electrode are wound or stacked, with the separator positioned between them, thus forming electrode assembly 23. The portions of the positive and negative electrode with active material constitute the main body of electrode assembly 23, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or at opposite ends. During charging and discharging, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0064] Please refer to the following: Figure 2 , Figure 4 as well as Figure 5 One embodiment of this application provides a battery device 100, including a housing 10, a plurality of battery cells 20, and a separator assembly 30. The housing 10 has a receiving space, and each battery cell 20 is disposed within the receiving space. The separator assembly 30 is disposed between every two adjacent battery cells 20 along a predetermined direction a, and contacts the surfaces of the battery cells 20 on adjacent sides. The separator assembly 30 includes a separator 31 and a heat exchanger 32. The heat exchanger 32 is disposed around the outer periphery of the outer contour of the separator 31, and a heat exchange channel for circulating heat exchange medium is formed within the heat exchanger 32. A clearance window 33 is provided on the separator 31, extending through along the predetermined direction a.

[0065] It should be noted that the housing 10 refers to a component that provides housing space for other structures in the battery device 100. The interior of the housing 10 is hollow to form a housing space. By placing the battery cell 20 and other functional components within the housing space, the housing 10 can provide a certain degree of protection for the battery cell 20 and other functional components.

[0066] All battery cells 20 are housed within the receiving space and are typically arranged in an array within the receiving space. Furthermore, since the battery cells 20 will expand and deform during cycling, if the battery cells 20 are tightly fitted together, there will be no space for expansion and deformation, which may affect the performance of the battery cells 20.

[0067] Under this premise, a separator assembly 30 is provided between two adjacent battery cells 20 along a preset direction a. The separator assembly 30 includes a separator 31, on which a clearance window 33 is provided that extends through along the preset direction a. In this way, the separator 31 is supported between two adjacent battery cells 20 along the preset direction a, and the clearance window 33 on the separator 31 can provide expansion space for the battery cells 20.

[0068] Furthermore, the separator assembly 30 also includes a heat exchanger 32, which is configured as a ring structure and surrounds the outer periphery of the separator 31 in a predetermined direction a. The heat exchanger 32 is hollow inside, forming a heat exchange channel into which cooling water or heat transfer oil can be introduced. When the separator assembly 30 comes into contact with the adjacent battery cell 20, the heat exchanger inside the heat exchanger 32 exchanges heat with the battery cell 20 through the contact surface, thereby cooling the battery cell 20.

[0069] Thus, while the separator 31 provides expansion space for two adjacent battery cells 20, the heat exchanger 32 is arranged around the outer periphery of the separator 31. The heat exchanger 32 can exchange heat with the battery cells 20, and the heat exchanger 32 occupies only the gap between two adjacent battery cells 20 on the outer periphery of the separator 31, without occupying additional installation space. This allows the separator assembly 30 to simultaneously provide expansion space and achieve the effect of heat exchange.

[0070] Through the above structure, the separator 31 in the separator assembly 30 provides expansion space for the battery cell 20, enabling the battery cell 20 to circulate smoothly. Simultaneously, the heat exchanger 32 in the separator assembly 30 enables heat exchange between adjacent battery cells 20 without requiring additional installation space, effectively improving the energy density of the battery device 100. In other words, by setting up the separator assembly 30, both the energy density of the battery device 100 and the heat dissipation effect of the battery cells 20 can be improved simultaneously.

[0071] like Figure 4 and Figure 6 As shown, in some embodiments, the outer periphery of the outer contour of the separator 31 is recessed to form a groove 34, and the heat exchanger 32 is snapped into the groove 34.

[0072] Specifically, the partition 31 can be, but is not limited to, a rectangular annular structure, with a clearance window 33 formed in its middle. A groove 34 is formed on the outer peripheral surface of the partition 31, and the groove 34 is arranged around the circumference of the partition 31. In this way, when the heat exchanger 32 is disposed on the periphery of the partition 31, the heat exchanger 32 can be engaged in the groove 34, thereby fixing the heat exchanger 32.

[0073] In one specific embodiment, the heat exchanger 32 can be completely accommodated in the groove 34 and achieve heat exchange with the battery cell 20 through the transfer of the separator 31. That is, in a plane perpendicular to the preset direction a, the projection of the separator 31 completely covers the projection of the heat exchanger 32. In this way, the heat exchanger 32 can be better embedded in the groove 34, forming an integral structure with the separator 31, without occupying more space.

[0074] Of course, in some other embodiments, the heat exchanger 32 may also be partially housed in the groove 34, while the portion not housed in the groove 34 directly contacts the surface of the battery cell 20 to achieve heat exchange.

[0075] By setting the groove 34, a quick and stable connection can be achieved between the heat exchanger 32 and the partition 31, so that the heat exchanger 32 and the partition 31 can be better combined to form an integral structure.

[0076] Please refer to Figure 7 In some embodiments, the sidewall of the groove 34 is chamfered at one end of the groove opening.

[0077] Specifically, a chamfer structure is provided at the opening of the groove 34, so that the opening of the groove 34 forms an outwardly opening trumpet shape.

[0078] In this way, when the heat exchanger 32 is installed in the groove 34, the heat exchanger 32 can slide smoothly into the groove 34 along the chamfered bevel of the flared mouth shape, making the installation process smoother and improving assembly efficiency.

[0079] In some embodiments, the material of the separator 31 is configured as an elastic insulating material.

[0080] Specifically, the material of the separator 31 is elastic. On the one hand, when the separator 31 is disposed between two adjacent battery cells 20, the elasticity of the separator 31 provides a larger expansion space for the battery cells 20. On the other hand, when the heat exchanger 32 is disposed on the periphery of the separator 31, the elastic deformation of the separator 31 makes it easier to snap the heat exchanger 32 onto the outer periphery of the separator 31, thereby improving assembly efficiency.

[0081] Furthermore, the material of the separator 31 is an insulating material. In this way, the separator 31 isolates two adjacent battery cells 20, which can effectively reduce the probability of a short circuit between two adjacent battery cells 20.

[0082] Thus, through the above structure, the separator 31 can not only achieve insulation separation between two adjacent battery cells 20, but also provide a larger expansion space for the battery cells 20, and enable the separator 31 and the heat exchanger 32 to be assembled faster and better.

[0083] Please refer to the following: Figure 6 and Figure 7 In some embodiments, the separator 31 includes a first sub-component 311 and a second sub-component 312 that are separately arranged. The first sub-component 311 and the second sub-component 312 are connected end to end and enclose each other to form a clearance window 33.

[0084] Specifically, the separator 31 is configured as a first sub-component 311 and a second sub-component 312, which are assembled by connecting the first sub-component 311 and the second sub-component 312 end to end, and the first sub-component 311 and the second sub-component 312 together enclose and form a clearance window 33.

[0085] In this way, the first sub-component 311 and the second sub-component 312 can be assembled in a detachable manner, which makes it easier to replace the first sub-component 311 or the second sub-component 312 and can effectively save costs.

[0086] In some embodiments, the first sub-component 311 and the second sub-component 312 each include a first portion 313 and a second portion 314 that are separately disposed, one end of the first portion 313 is connected to one end of the corresponding second portion 314, and the first portion 313 is perpendicular to the corresponding second portion 314.

[0087] Specifically, the first sub-component 311 and the second sub-component 312 have the same structure, both including a first part 313 and a second part 314 that are separately arranged. The first part 313 and the second part 314 can both be arranged as rectangular plate structures, with one end of the first part 313 connected to one end of the corresponding second part 314 and arranged perpendicular to each other.

[0088] In this way, the first part 313 and the second part 314 of the first sub-component 311 and the second sub-component 312 are assembled together to form a rectangular frame that matches the shape of the battery cell 20.

[0089] With the above structure, the first sub-component 311 and the second sub-component 312 are both set as a first part 313 and a second part 314 of the separate components. In this way, the first part 313 and the second part 314 can be replaced accordingly, further improving the maintainability and economy of the separator 31.

[0090] like Figure 8 As shown, in some embodiments, a medium inlet 321 and a medium outlet 322, both of which are connected to the heat exchange channel, are respectively provided on the heat exchange element 32. The medium inlet 321 and the medium outlet 322 are arranged diagonally on the heat exchange element 32, and the medium inlet 321 is located below the medium outlet 322 along the direction of gravity.

[0091] Specifically, the heat exchanger 32 is configured as a rectangular ring structure corresponding to the partition 31 and surrounds the outer periphery of the partition 31.

[0092] Furthermore, the medium inlet 321 and the medium outlet 322 on the heat exchanger 32 are arranged diagonally, and the medium inlet 321 is located below the medium outlet 322 along the direction of gravity.

[0093] In this way, the heat exchange medium, such as cooling water, is injected into the heat exchange channel from the medium inlet 321 below, filling the entire heat exchange channel, and finally flows out from the medium outlet 322 above. This allows the heat exchange medium to better fill the heat exchange channel, increasing the contact area between the heat exchange medium and the battery cell 20, and improving the heat exchange efficiency.

[0094] like Figure 5 and Figure 9 As shown, in some embodiments, the separator 30 is disposed along a preset direction a between the large surfaces of every two adjacent battery cells 20 and is in contact with the large surfaces of the adjacent battery cells 20.

[0095] It should be noted that the battery cell 20 is usually set as a rectangular structure, that is, the battery cell 20 usually has two large surfaces, two side surfaces, a top surface and a bottom surface. The two large surfaces are parallel to each other, the two side surfaces are parallel to each other, and the top surface and the bottom surface are parallel to each other, so that they are assembled together to form a rectangular battery cell 20 structure.

[0096] Here, "large surface" refers to the surface with the largest area. Therefore, when the battery cell 20 expands and deforms, the deformation on the large surface is often the greatest, especially concentrated in the middle of the large surface.

[0097] Based on this, the separator 30 is positioned between the large surfaces of each pair of adjacent battery cells 20 along a preset direction a. In other words, the preset direction a is perpendicular to the large surface, which is the thickness direction of the battery cell 20.

[0098] In this way, the separator 31 in the separator assembly 30 can provide a certain expansion space for the large surface of the adjacent battery cells 20, and the heat exchanger 32 in the separator assembly 30 can also realize heat exchange on the large surface of the battery cells 20, thereby improving the heat exchange efficiency of the battery cells 20.

[0099] In some embodiments, in a plane perpendicular to a preset direction a, the projection of the separator 30 falls within the large-area projection range of the adjacent battery cell 20.

[0100] Specifically, the projection of the separating component 30 falls within the projection range of the large surface of the adjacent battery cell 20 on the plane perpendicular to the preset direction a, that is, the plane parallel to the large surface of the battery cell 20.

[0101] In this way, the separator 30 does not exceed the large surface area of ​​the battery cell 20 in both the height and width directions, allowing the separator 30 to be better accommodated between the large surfaces of two adjacent battery cells 20 without occupying additional installation space, thereby further improving the energy density of the battery cell 20.

[0102] In some embodiments, the vacant window 33 is centered on the corresponding separator 31.

[0103] Specifically, the expansion deformation of the battery cell 20 is mainly concentrated on the large surface of the battery cell 20, especially in the middle of the large surface.

[0104] Therefore, when the clearance window 33 is centered on the corresponding separator 31 and the separator 31 is placed between the large surfaces of two adjacent battery cells 20, the clearance window 33 can better correspond to the middle position of the large surface, thereby providing a larger expansion space for the battery cell 20.

[0105] Based on the same concept as the battery device 100 described above, this application also provides an electrical device including the battery device 100 as described above.

[0106] According to one or more embodiments, in specific use, the first portion 313 and the second portion 314 of the first sub-component 311 and the second sub-component 312 can be sequentially snapped onto the inner circumference of the heat exchanger 32, and the heat exchanger 32 can be snapped into the groove 34 on the outer circumference of the first sub-component 311 and the second sub-component 312. Since the separator 31 is elastic, it can achieve assembly with the heat exchanger 32 through elastic deformation.

[0107] After assembly, the separator 30, which is formed by assembling the separator 31 and the heat exchanger 32, is placed between the large surfaces of two adjacent battery cells 20. At this time, the clearance window 33 on the separator 31 can provide expansion space for the large surface of the battery cell 20. After the heat exchange medium is introduced into the heat exchanger 32, heat exchange between the adjacent battery cells 20 can be achieved through the heat exchanger 32.

[0108] Furthermore, since the separator 31 is elastic, when all the battery cells 20 are placed in the housing space of the housing 10, the separator 31 can also use its own elastic deformation to make all the battery cells 20 more stably placed inside the housing 10.

[0109] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, include: The container has storage space; Multiple battery cells are disposed within the accommodating space; and A separator is disposed between each pair of adjacent battery cells along a preset direction and in contact with the surfaces of the battery cells on the adjacent sides; the separator includes a separator and a heat exchanger, the heat exchanger is disposed around the outer periphery of the outer contour of the separator, a heat exchange channel is formed inside the heat exchanger for the circulation of heat exchange medium, and a clearance window is provided on the separator along the preset direction.

2. The battery device according to claim 1, characterized in that, The outer periphery of the separator is recessed to form a groove, and the heat exchanger is snapped into the groove.

3. The battery device according to claim 2, characterized in that, The sidewall of the groove is chamfered at one end of the groove opening.

4. The battery device according to claim 1, characterized in that, The material of the separator is configured as an elastic insulating material.

5. The battery device according to claim 1, characterized in that, The separator includes a first sub-component and a second sub-component that are separately arranged. The first sub-component and the second sub-component are connected end to end and enclose each other to form the clearance window.

6. The battery device according to claim 5, characterized in that, Both the first sub-component and the second sub-component include a first part and a second part that are separately configured. One end of the first part is connected to one end of the corresponding second part, and the first part is perpendicular to the corresponding second part.

7. The battery device according to claim 1, characterized in that, The heat exchanger has a medium inlet and a medium outlet, both of which are connected to the heat exchange channel. The medium inlet and the medium outlet are diagonally arranged on the heat exchanger, and the medium inlet is located below the medium outlet along the direction of gravity.

8. The battery device according to claim 1, characterized in that, The separator is disposed between the large surfaces of each two adjacent battery cells along the preset direction and is in contact with the large surfaces of the adjacent battery cells.

9. The battery device according to claim 8, characterized in that, In a plane perpendicular to the preset direction, the projection of the separating component falls within the large projection range of the adjacent battery cell.

10. The battery device according to claim 8, characterized in that, The vacant window is centered on the corresponding separator.

11. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-10.

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