Battery device and electric device having the same

Abstract

The utility model provides a kind of battery device and electric device with it, wherein, battery device includes: heat exchange plate piece, including main body plate section and the first plate section and the second plate section being arranged in the both ends of main body plate section, first plate section has the first surface towards second plate section, obtuse angle included angle is formed between first surface and main body plate section;Battery cell structure is clamped between first plate section and second plate section, battery cell structure has guide surface and first side, first side is correspondingly arranged with main body plate section and cooperates heat conduction, guide surface cooperates heat conduction with first surface and is guided cooperation.The technical scheme of the application can effectively solve the problem of large assembly difficulty in related technology.

Description

Technical Field

[0001] This utility model relates to the field of chemical energy storage technology, and more specifically, to a battery device and an electrical device having the same. Background Technology

[0002] Currently, batteries, as a chemical energy storage structure, provide a stable and reliable energy source for various industries. Especially in the field of new energy vehicles, where technology has made leaps and bounds, power batteries, as the power source of electric vehicles, play a crucial role. Among these, batteries, as core components of new energy vehicles, have high requirements in terms of both performance and manufacturing quality.

[0003] In related fields, the battery cells generate a lot of heat during operation, which reduces the reliability of the battery. Therefore, heat exchange plates are usually installed to dissipate heat from the cells. In addition, the heat exchange plates can also serve as supports and limits. Since multiple cells require the cooperation of heat exchange plates, the assembly process is quite complicated. Utility Model Content

[0004] The main objective of this invention is to provide a battery device and an electrical device having the same, in order to solve the problem of high assembly difficulty in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery device is provided, comprising: a heat exchange plate, including a main plate segment and a first plate segment and a second plate segment disposed at both ends of the main plate segment, the first plate segment having a first surface facing the second plate segment, the first surface forming an obtuse angle with the main plate segment; and a battery cell structure sandwiched between the first plate segment and the second plate segment, the battery cell structure having a guide surface and a first side surface, the first side surface being correspondingly disposed with the main plate segment and thermally conductively engaged, and the guide surface being guided and thermally conductively engaged with the first surface.

[0006] According to another aspect of the present invention, an electrical device is provided, comprising a plurality of battery devices, wherein the battery devices are those described above.

[0007] By applying the technical solution of this utility model, the heat exchange plate can exchange heat with the cell structure, thereby dissipating heat from the cell structure. The heat exchange plate includes a main plate segment and a first plate segment and a second plate segment disposed at both ends of the main plate segment. The cell structure is sandwiched between the first plate segment and the second plate segment, thereby realizing the supporting and limiting function of the heat exchange plate for the cell structure. The first plate segment has a first surface facing the second plate segment, and the first surface forms an obtuse angle with the main plate segment, so that the size of the opening between the first plate segment and the second plate segment gradually increases in the direction away from the main plate segment, making it easier to assemble the cell structure with the heat exchange plate. In addition, the cell structure has a guide surface, which guides and cooperates with the first surface, making it easier to install the cell structure. The cell structure has a first side surface, which is correspondingly disposed and thermally cooperates with the main plate segment, and the guide surface thermally cooperates with the first surface, thereby making the heat exchange area between the cell structure and the heat exchange plate larger, thus ensuring the heat dissipation effect of the heat exchange plate on the cell structure, and further improving the reliability of the battery device. Therefore, the technical solution of this application can effectively solve the problem of high assembly difficulty in related technologies. Attached Figure Description

[0008] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0009] Figure 1 A perspective structural schematic diagram of a portion of the structure of an embodiment of the battery device according to the present invention is shown;

[0010] Figure 2 It shows Figure 1 A three-dimensional structural diagram of part of the battery device;

[0011] Figure 3 It shows Figure 1 A cross-sectional schematic diagram of the heat exchange plate of the battery device;

[0012] Figure 4 It shows Figure 1 A cross-sectional schematic diagram of the battery device.

[0013] The above figures include the following reference numerals:

[0014] a. Obtuse angle;

[0015] 10. Heat exchange plate; 11. Main plate segment; 111. Heat exchange flow channel; 12. First plate segment; 121. First surface; 122. Second surface; 123. Weight reduction hole; 124. Clearance notch; 13. Second plate segment;

[0016] 20. Cell structure; 21. Guide surface; 22. First side surface; 23. Second side surface. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0020] like Figures 1 to 4As shown, this application provides a battery device. An embodiment of the battery device of this application includes: a heat exchange plate 10 and a cell structure 20; the heat exchange plate 10 includes a main plate segment 11 and a first plate segment 12 and a second plate segment 13 disposed at both ends of the main plate segment 11. The first plate segment 12 has a first surface 121 facing the second plate segment 13, and the first surface 121 forms an obtuse angle α with the main plate segment 11; the cell structure 20 is sandwiched between the first plate segment 12 and the second plate segment 13. The cell structure 20 has a guide surface 21 and a first side surface 22. The first side surface 22 is correspondingly disposed with the main plate segment 11 and thermally conductively engaged. The guide surface 21 is guided and thermally conductively engaged with the first surface 121.

[0021] Applying the technical solution of this embodiment, the heat exchange plate 10 can exchange heat with the battery cell structure 20, thereby dissipating heat from the battery cell structure 20. The heat exchange plate 10 includes a main plate segment 11 and a first plate segment 12 and a second plate segment 13 disposed at both ends of the main plate segment 11. The battery cell structure 20 is sandwiched between the first plate segment 12 and the second plate segment 13, thereby realizing the supporting and limiting function of the heat exchange plate 10 on the battery cell structure 20. The first plate segment 12 has a first surface 121 facing the second plate segment 13, and the first surface 121 forms an obtuse angle α with the main plate segment 11, thereby making the size of the opening between the first plate segment 12 and the second plate segment 13 further away from the main plate segment 11. The plate segment 11 gradually increases in size, making it easier to assemble the cell structure 20 with the heat exchange plate 10. Furthermore, the cell structure 20 has a guide surface 21 that guides and engages with the first surface 121, further facilitating the insertion of the cell structure 20. The cell structure 20 also has a first side surface 22 that corresponds to and thermally engages with the main plate segment 11, and the guide surface 21 thermally engages with the first surface 121. This results in a larger heat exchange area between the cell structure 20 and the heat exchange plate 10, ensuring effective heat dissipation from the heat exchange plate 10 and further improving the reliability of the battery device. Therefore, the technical solution of this embodiment effectively solves the problem of high assembly difficulty in related technologies.

[0022] like Figures 1 to 4As shown, the cell structure 20 also has a second side surface 23, which is disposed opposite to the first side surface 22. A guide surface 21 connects the second side surface 23 and the first side surface 22. In the direction from the first plate segment 12 to the second plate segment 13, the height H1 of the second side surface 23 and the height H2 of the first side surface 22 satisfy the condition: H1 > H2. Specifically, by making the height H2 of the first side surface 22 lower than the height H1 of the second side surface 23, the guide surface 21 can be inclined, thereby enabling the guide surface 21 and the inclined first surface 121 to achieve guiding cooperation. In addition, this arrangement can maximize the volume of the part of the cell structure 20 away from the main plate segment 11 (that is, the part close to the second side surface 23), thereby ensuring that the cell structure 20 has a large energy density and thus ensuring the energy storage effect of the cell structure 20.

[0023] like Figures 1 to 4 As shown, in the direction from the first plate segment 12 to the second plate segment 13, the difference between the height H1 of the second side 23 and the height H2 of the first side 22 satisfies: 0.5mm ≤ H1 - H2 ≤ 5mm. Specifically, satisfying the above requirement, the difference between the height H2 of the second side 23 and the height H1 of the first side 22 ensures that the difference is not too small, thereby ensuring a larger area of ​​the guide surface 21, effectively increasing the heat exchange area and ensuring the heat dissipation effect, as well as the guiding effect. On the other hand, it ensures that the difference between the height H2 of the second side 23 and the height H1 of the first side 22 is not too large, avoiding excessive impact on the energy density and space utilization of the cell structure 20 due to such a height difference, and also affecting the assembly strength between the cell structure 20 and the heat exchange plate 10. The difference between the height H2 of the second side 23 and the height H1 of the first side 22, H2-H1, can be 0.5mm, 1.2mm, 2.4mm, 2.8mm, 3.6mm, 4mm, 4.5mm, or 5mm.

[0024] like Figures 1 to 4 As shown, the first side surface 22 has a first area, the second side surface 23 has a second area, and the contact surface between the guide surface 21 and the first plate segment 12 has a third area. The sum of the first area and the third area is greater than the second area. Specifically, since the first area and the third area are areas where heat exchange is possible, this arrangement makes the areas of the first area and the third area larger, thereby making the heat exchange area larger and thus making the heat exchange plate 10 have a better heat dissipation effect on the cell structure 20.

[0025] like Figures 1 to 4As shown, the obtuse angle α between the first plate segment 12 and the main plate segment 11 is greater than 90° and less than or equal to 140°. Meeting these requirements, the obtuse angle α between the first plate segment 12 and the main plate segment 11 forms a gradually increasing opening. This design facilitates the insertion and positioning of the battery cell structure 20, reduces assembly difficulty, and improves assembly efficiency. It also guides the battery cell structure 20 to be correctly installed into the heat exchange plate 10, ensuring the contact area and contact pressure between the battery cell structure 20 and the first plate segment 12 and the second plate segment 13, thereby guaranteeing good heat conduction and support effects. This arrangement helps increase the overall structural stability of the heat exchange plate 10. The obtuse angle α between the first plate segment 12 and the main plate segment 11 can be 91°, 101°, 116°, 120°, 127°, 130°, 136°, or 140°.

[0026] like Figures 1 to 4 As shown, the second plate segment 13 is vertically positioned between it and the main plate segment 11. Specifically, this arrangement allows for a more compact layout of the battery device within a limited space, ensuring the stacking efficiency of the cell structure 20. The vertical second plate segment 13 provides robust lateral support for the cell structure 20 sandwiched within it, preventing movement or deformation of the cells within the battery device. The vertically positioned second plate segment 13 simplifies the overall design of the heat exchange plate 10, making it easier to implement during manufacturing and reducing production difficulty and cost.

[0027] like Figures 1 to 4 As shown, the first plate segment 12 also has a second surface 122 facing away from the second plate segment 13, and the second surface 122 is perpendicular to the main plate segment 11. Specifically, the perpendicularly arranged second surface 122 provides a clear spatial positioning, which helps in the precise layout of the cell structure 20 and other components inside the battery device. This layout optimization ensures that the cell structure 20 can be accurately clamped between the first plate segment 12 and the second plate segment 13, avoiding misalignment during installation and improving the overall assembly accuracy of the battery device.

[0028] like Figures 1 to 4 As shown, the first plate segment 12 has weight-reduction holes 123. Specifically, the weight-reduction holes 123 can significantly reduce the amount of material used in the first plate segment 12, thereby reducing the weight of the entire battery device. Especially in weight-sensitive applications such as new energy vehicles, reducing the weight of the battery device can improve the vehicle's energy efficiency, acceleration performance, and driving range. By creating weight-reduction holes 123 in the first plate segment 12, materials can be saved, thereby reducing the manufacturing cost of the battery device. This is particularly important for mass production and can effectively enhance product competitiveness.

[0029] like Figures 1 to 4As shown, the cell structure 20 has an explosion-proof valve, which is disposed on the guide surface 21. The first plate segment 12 has a clearance notch 124 to avoid the explosion-proof valve. The explosion-proof valve is a safety protection device designed to automatically open and release pressure when the internal pressure of the cell structure 20 abnormally increases, preventing the cell structure 20 from exploding or catching fire. Its placement on the guide surface 21 ensures effective monitoring and control of the internal pressure of the cell structure 20 at a critical position in the thermal management and energy output path, significantly improving the safety performance of the battery device. The clearance notch 124 ensures that the explosion-proof valve is not obstructed by the first plate segment 12, allowing the cell structure 20 to be smoothly assembled with the heat exchange plate 10, reducing alignment errors during assembly.

[0030] like Figures 1 to 4 As shown, the main plate segment 11 is provided with heat exchange channels 111 for accommodating the heat dissipation medium, and the heat exchange channels 111 extend along the extension direction of the main plate segment 11. Through the continuous extension of the heat exchange channels 111, the heat dissipation medium can form an efficient and uniform heat exchange network between the cell structure 20 and the main plate segment 11, ensuring that the heat generated by the cell structure 20 can be quickly and uniformly absorbed by the heat dissipation medium and dissipated outward. This effectively reduces the temperature gradient of the battery device, allowing the cell structure 20 to operate at a constant temperature, greatly improving the operational stability and service life of the battery device. The continuously extending heat exchange channels 111 ensure that the flow resistance of the heat dissipation medium is minimized, promoting its smooth circulation within the channels, thereby accelerating the heat transfer rate.

[0031] like Figures 1 to 4 As shown, there are multiple cell structures 20, with one cell structure 20 on each side of the main plate segment 11. The heat exchange plate 10 includes two first plate segments 12 and two second plate segments 13, where the two first plate segments 12 are located on both sides of the main plate segment 11, and the two second plate segments 13 are located on both sides of the main plate segment 11. This dual-sided cell structure 20 layout significantly improves the total energy density and power output capability of the battery device. By connecting the cell structures 20 in parallel or series, the overall discharge power is improved, meeting the needs of high-load application scenarios. The dual-sided cell structure 20 arrangement complements the dual-plate segment design of the heat exchange plate 10, achieving more efficient and uniform thermal management. By setting the cell structures 20 on both sides of the main plate segment 11 and cooperating with the dual-plate segment design of the heat exchange plate 10, the overall design of the battery device is more compact, reducing unnecessary gaps and volume waste.

[0032] like Figures 1 to 4As shown, the main plate segment 11, the first plate segment 12, and the second plate segment 13 are integrally formed. Integral forming reduces the number of connections between components, avoiding the strength reduction caused by welding, bolting, or other connection methods. The entire heat exchange plate 10 structure is more robust, better resisting external impacts and the pressure generated by internal cell expansion, thus improving the structural stability and safety of the battery device. Integral forming ensures seamless heat conduction between the main plate segment 11, the first plate segment 12, and the second plate segment 13, reducing contact thermal resistance and facilitating the rapid and uniform conduction of heat generated by the cell structure 20 to the heat exchange plate 10, which is then effectively dissipated through the heat exchange channel 111, improving the overall heat dissipation performance of the battery device. Integral forming reduces the number of manufacturing and assembly steps for multiple components, simplifying the production process and lowering production costs.

[0033] [Battery Structure]

[0034] The cell structure 20 in this application is a secondary battery, also known as a rechargeable battery or storage battery, which refers to a battery that can be used again after being discharged by recharging to activate the active materials.

[0035] Typically, a secondary battery includes an electrode assembly, an electrolyte, and an outer casing. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The electrode assembly and electrolyte are assembled inside the outer casing. During charging and discharging, active ions (such as lithium ions) move back and forth between the positive and negative electrodes, inserting and extracting. The separator, positioned between the positive and negative electrodes, primarily prevents short circuits while allowing active ions to pass through. The electrolyte, located between the positive and negative electrodes, mainly serves to conduct active ions.

[0036] As an example, the preparation process of a secondary battery is as follows: the positive electrode, separator, and negative electrode are stacked in sequence, with the separator acting as a separator between the positive and negative electrodes. Then, the electrodes are wound or stacked to obtain an electrode assembly. The electrode assembly is placed in an outer packaging shell, dried, and then injected with electrolyte. After vacuum sealing, settling, formation, and shaping, a secondary battery is obtained.

[0037] [Positive electrode tablets]

[0038] A positive electrode typically includes a positive current collector and a positive electrode film layer disposed on at least one side of the positive current collector. The positive electrode film layer includes a positive electrode active material, which can be any existing publicly disclosed positive electrode active material or a positive electrode active material optimized based on existing materials.

[0039] This application does not impose any particular restrictions on the type of positive electrode active material for the positive electrode sheet. As an example, the positive electrode active materials in this application include lithium-containing transition metal oxides (e.g., LiCoO2), phosphides (e.g., LiFePO4), or lithium intercalation compounds (e.g., positive electrode materials for binary lithium batteries such as lithium cobalt oxide and lithium nickel oxide, or positive electrode materials for ternary lithium batteries such as lithium nickel cobalt manganese oxide and lithium nickel cobalt aluminum oxide).

[0040] In some embodiments, the positive electrode sheet can be prepared by dispersing the above-mentioned components for preparing the positive electrode sheet, such as positive electrode active material, conductive agent, binder and any other components, in a solvent (e.g., N-methylpyrrolidone) to form a positive electrode slurry; coating the positive electrode slurry onto the positive electrode current collector, and then obtaining the positive electrode sheet after drying, rolling, cutting and other processes.

[0041] In this application, the binder is used to improve the adhesion between positive electrode active material particles and the adhesion between the positive electrode active material and the current collector. This application does not impose any particular limitation on the type of binder for the positive electrode sheet; the binder can be any conventional choice in the battery industry. Specifically, the binder can be at least one of polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), polyvinyl alcohol (PVA), styrene-butadiene rubber (SBR), polyacrylonitrile (PAN), polyimide (PI), polyacrylic acid (PAA), polyacrylate, polyolefin, sodium carboxymethyl cellulose (CMC), or sodium alginate.

[0042] This application does not impose any particular restrictions on the positive electrode current collector, as long as it is conductive and will not cause adverse chemical changes in the battery, and can be made of, for example: stainless steel, aluminum, nickel, titanium, sintered carbon; or aluminum or stainless steel that has been surface treated with one of carbon, nickel, titanium, silver, etc.

[0043] [Negative electrode plate]

[0044] The negative electrode includes a negative electrode current collector and a negative electrode active material layer disposed on at least one side of the negative electrode current collector. The negative electrode active material layer comprises a silicon-based material. This application does not specifically limit the type of silicon-based material; the silicon-based material can be a silicon-carbon material and / or a silicon-oxygen material. As an example, the silicon-based material can be one or more of silicon-carbon composite negative electrode materials, silicon suboxide negative electrode materials, modified silicon suboxide negative electrode materials, and nano-silicon materials. The negative electrode active material in the negative electrode active material layer may also optionally include one or more of artificial graphite, natural graphite, and hard carbon.

[0045] In some embodiments, the negative electrode sheet can be prepared by dispersing the components used to prepare the negative electrode sheet, such as the negative electrode active material, conductive agent, binder and any other components, in a solvent (e.g., water) to form a negative electrode slurry; coating the negative electrode slurry onto the negative electrode current collector, and then obtaining the negative electrode sheet after drying, rolling, cutting and other processes.

[0046] This application does not specifically limit the type of negative electrode conductive agent. In some embodiments, as an example, the negative electrode conductive agent can be one or more of conventional negative electrode conductive agents such as acetylene black and carbon nanotubes.

[0047] This application does not impose specific restrictions on the type of negative electrode binder. In some embodiments, as an example, the binder may be one or more of conventional negative electrode binders such as styrene-butadiene rubber latex (SBR), polyvinylidene fluoride (PVDF), polyacrylic acid (PAA), and sodium carboxymethyl cellulose (CMC). In this application, the binder is preferably PAA, SBR, and CMC, and the mass ratio of PAA, SBR, and CMC may be (34.38-74.29):(20-59.38):(5-7.14).

[0048] This application does not impose specific limitations on the type of negative electrode current collector. In some embodiments, as an example, the negative electrode current collector can be one of the conventional negative electrode current collectors such as copper foil.

[0049] Electrolyte

[0050] The electrolyte acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. As an example, the electrolyte in this application can be any electrolyte suitable for electrochemical energy storage devices in the art. The electrolyte includes an electrolyte and a solvent; the electrolyte typically includes a lithium salt, and additives may also be added to the electrolyte.

[0051] Specifically, the lithium salt includes at least one selected from lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), lithium perchlorate (LiClO4), lithium hexafluoroarsenate (LiAsF6), lithium bis(fluorosulfonyl)imide (LiFSI), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), lithium trifluoromethanesulfonate (LiTFS), lithium difluorooxalate borate (LiDFOB), lithium dioxalate borate (LiBOB), lithium difluorophosphate (LiPO2F2), lithium difluorodioxalate phosphate (LiDFOP), and lithium tetrafluorooxalate phosphate (LiTFOP). The concentration of the electrolyte in the electrolyte solution can be 0.5–5 mol / L.

[0052] Specifically, the solvent includes at least one of ethylene carbonate (EC), propylene carbonate (PC), methyl ethyl carbonate (EMC), diethyl carbonate (DEC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), methyl propyl carbonate (MPC), ethyl propyl carbonate (EPC), butyl carbonate (BC), fluoroethylene carbonate (FEC), methyl formate (MF), methyl acetate (MA), ethyl acetate (EA), propyl acetate (PA), methyl propionate (MP), ethyl propionate (EP), propyl propionate (PP), methyl butyrate (MB), ethyl butyrate (EB), 1,4-butyrolactone (GBL), sulfolane (SF), dimethyl sulfone (MSM), methyl ethyl sulfone (EMS), and diethyl sulfone (ESE).

[0053] In some implementations, as an example, the additive may be a conventional electrolyte additive such as fluoroethylene carbonate (FEC), chloroethylene carbonate (CEC), or vinylene carbonate (VC).

[0054] [Septum]

[0055] In some embodiments, the secondary battery also includes a separator. This application does not impose any particular limitation on the type of separator; any known porous separator with good chemical and mechanical stability can be selected.

[0056] In some embodiments, as an example, the diaphragm can be one of PP, PE, or PP / PF; the diaphragm can also be a structure in which a coating is formed on the surface of the base film, wherein the base film coating can be one of PP, PE, or PP / PF, and the coating can be an inorganic coating and / or an organic coating. The inorganic coating can be selected from alumina ceramic layers, osmium silicate, etc., and the organic coating can be selected from PVDF, etc.

[0057] This application also provides an electrical device comprising multiple battery devices, wherein the battery devices are as described above. The aforementioned battery device effectively solves the problem of difficult assembly in related technologies, and the electrical device having the aforementioned battery device also possesses the aforementioned advantages.

[0058] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0059] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0060] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0061] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery device, characterized in that, include: The heat exchange plate (10) includes a main plate segment (11) and a first plate segment (12) and a second plate segment (13) disposed at both ends of the main plate segment (11). The first plate segment (12) has a first surface (121) facing the second plate segment (13). The first surface (121) forms an obtuse angle (a) with the main plate segment (11). The battery cell structure (20) is sandwiched between the first plate segment (12) and the second plate segment (13). The battery cell structure (20) has a guide surface (21) and a first side surface (22). The first side surface (22) is correspondingly disposed with the main plate segment (11) and thermally connected. The guide surface (21) is guided and thermally connected with the first surface (121).

2. The battery device according to claim 1, characterized in that, The cell structure (20) also has a second side (23), which is disposed opposite to the first side (22). The guide surface (21) is connected between the second side (23) and the first side (22). In the direction from the first plate segment (12) to the second plate segment (13), the height H1 of the second side (23) and the height H2 of the first side (22) satisfy: H1 > H2.

3. The battery device according to claim 2, characterized in that, In the direction from the first plate segment (12) to the second plate segment (13), the difference between the height H1 of the second side surface (23) and the height H2 of the first side surface (22) satisfies: 0.5mm≤H1-H2≤5mm.

4. The battery device according to claim 2, characterized in that, The first side (22) has a first area, the second side (23) has a second area, and the contact surface between the guide surface (21) and the first plate segment (12) has a third area. The sum of the first area and the third area is greater than the second area.

5. The battery device according to claim 1, characterized in that, The obtuse angle (a) between the first plate segment (12) and the main plate segment (11) is greater than 90° and less than or equal to 140°.

6. The battery device according to claim 1, characterized in that, The second plate segment (13) is perpendicular to the main plate segment (11).

7. The battery device according to any one of claims 1 to 6, characterized in that, The first plate segment (12) also has a second surface (122) facing away from the second plate segment (13), and the second surface (122) is perpendicular to the main plate segment (11).

8. The battery device according to claim 7, characterized in that, The first plate segment (12) is provided with weight reduction holes (123).

9. The battery device according to any one of claims 1 to 6, characterized in that, The cell structure (20) has an explosion-proof valve, which is disposed on the guide surface (21), and the first plate segment (12) has an avoidance notch (124) to avoid the explosion-proof valve.

10. The battery device according to any one of claims 1 to 6, characterized in that, The main plate segment (11) is provided with a heat exchange channel (111) for accommodating heat dissipation medium, and the heat exchange channel (111) extends along the extension direction of the main plate segment (11).

11. The battery device according to any one of claims 1 to 6, characterized in that, There are multiple battery cell structures (20), and one battery cell structure (20) is provided on each side of the main plate segment (11). The heat exchange plate (10) includes two first plate segments (12) and two second plate segments (13), wherein the two first plate segments (12) are located on both sides of the main plate segment (11), and the two second plate segments (13) are located on both sides of the main plate segment (11).

12. The battery device according to any one of claims 1 to 6, characterized in that, The main plate segment (11), the first plate segment (12) and the second plate segment (13) are integrally formed structures.

13. An electrical device comprising a plurality of battery devices, characterized in that, The battery device is the battery device according to any one of claims 1 to 12.

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