Battery device and electric equipment

Abstract

The invention discloses a battery device and electric equipment, and relates to the technical field of battery manufacturing. The battery device comprises a box body, a battery monomer assembly and a supporting piece, the box body comprises a box cover and a box body with a containing cavity, and the box body is covered with the box cover to seal the containing cavity; the battery monomer assembly comprises at least one battery monomer, the supporting piece comprises a base body and a bulge arranged on the base body, and the base body is connected with one side, facing the battery monomer, of the box cover; the protrusions are arranged in a protruding mode in the direction towards the battery single body assemblies, and the protrusions make contact with the battery single body assemblies. The base body is connected with the box cover, the deformation resistance of the box cover is improved, the protrusions make contact with the battery single body assemblies, the box cover can be supported, the deformation resistance of the box cover is further improved, and therefore the risk of abnormal sound caused by deformation of the box cover is reduced.

Description

Technical Field

[0001] This application relates to the technical field of battery manufacturing, and particularly relates to a battery device and an electrical equipment using the same. Background Art

[0002] During the use of battery devices such as battery packs and battery modules, abnormal noises sometimes occur. Summary of the Invention

[0003] The main purpose of this application is to propose a battery device and an electrical equipment using the same, which is beneficial to reducing abnormal noises during use.

[0004] To achieve the above purpose, the battery device proposed in this application includes a box body, a battery cell assembly, and a support member. The box body includes a box cover and a box body having a receiving cavity. The box cover covers the box body to close the receiving cavity. The battery cell assembly includes at least one battery cell. The support member includes a base body and a protrusion provided on the base body. The base body is connected to the side of the box cover facing the battery cell. The protrusion protrudes in the direction facing the battery cell assembly, and the protrusion contacts the battery cell assembly. At least two protrusions are provided on the base body, and a receiving gap is formed between two adjacent protrusions. The receiving gap communicates with the pressure relief mechanism of the battery cell. The battery cell includes two pole columns. The pressure relief mechanism is located between the two pole columns. At least two protrusions are disposed opposite to the two pole columns of one battery cell, so that a receiving gap is disposed opposite to the space between the two pole columns of the same battery cell.

[0005] In the battery device provided by this application, the connection between the base body and the box cover is beneficial to improving the anti-deformation ability of the box cover. The protrusion contacts the battery cell assembly, which can support the box cover and is beneficial to further improving the anti-deformation ability of the box cover. In this way, it is beneficial to reduce the risk of abnormal noises caused by the deformation of the box cover. The gas-solid mixture discharged by the battery cell through the pressure relief mechanism during thermal runaway can flow into the receiving gap formed between two adjacent protrusions, thereby increasing the discharge space of the battery device for the gas-solid mixture during thermal runaway through the receiving gap, thereby reducing the possibility of the gas-solid mixture during thermal runaway forming a local high pressure and reducing the risk of cracking of the box body. The receiving gap and the space between the two pole columns can jointly serve as the discharge space for the gas-solid mixture during thermal runaway, thereby further reducing the possibility of the gas-solid mixture during thermal runaway forming a local high pressure.

[0006] In some embodiments, a cavity is formed between the protrusion and the base body.

[0007] Thus, it is beneficial to reduce the weight of the support member. On the one hand, it is beneficial to reduce costs, and on the other hand, it is beneficial to reduce the impact of adding the support member on the overall weight of the battery device.

[0008] In some embodiments, at least one of the protrusions is provided with a connecting through-hole, and the connecting through-hole communicates the cavity and the accommodating gap.

[0009] Thus, the gas-solid mixture in thermal runaway can be discharged into the cavity through the connecting through-hole, thereby further increasing the discharge space for the gas-solid mixture in thermal runaway through the cavity, and further reducing the possibility of the gas-solid mixture in thermal runaway forming a local high pressure.

[0010] In some embodiments, the hardness of the protrusion is less than the hardness of the base.

[0011] The hardness of the base is greater than the hardness of the protrusion. On the one hand, it is beneficial to improve the strengthening effect of the protrusion on the structural strength of the box cover, and on the other hand, it is beneficial to reduce the pressure of the protrusion on the battery cell.

[0012] In some embodiments, the protrusion has elasticity. Thus, it is beneficial to reduce the acting force between the protrusion and the battery cell.

[0013] In some embodiments, the thickness of at least one of the base and the protrusion provided with the cavity is greater than or equal to 0.3 mm and less than or equal to 6 mm.

[0014] Thus, when the thickness of the base is greater than or equal to 0.3 mm, it is beneficial to improve the anti-deformation ability of the box cover through the base; when the thickness of the base is less than or equal to 6 mm, it is beneficial to reduce the occupied space of the support member and the material cost of the support member. When the thickness of the protrusion provided with the cavity is greater than or equal to 0.3 mm, it is beneficial to improve the supporting ability of the protrusion; when the thickness of the protrusion is less than or equal to 6 mm, it is beneficial to improve the deformation ability of the protrusion, thereby further reducing the extrusion acting force of the protrusion on the battery cell assembly.

[0015] In some embodiments, the box cover is located on one side of the battery cell along the first direction. Along the first direction, the outer contour of the protrusion gradually shrinks from the base towards the direction close to the battery cell.

[0016] Thus, the outer contour of the protrusion gradually shrinks along the first direction, and the outer contour of the end of the protrusion connected to the base is larger than the outer contour of the end of the protrusion facing the battery cell, which is beneficial to improving the supporting effect of the protrusion on the base, thereby improving the anti-deformation ability of the box cover, and is also beneficial to reducing the occupation of the space inside the box body by the protrusion, so as to optimize the internal space layout of the battery device.

[0017] In some embodiments, a support beam is provided in the accommodation cavity. The support beam is connected to the box body, and is disposed opposite to the accommodation gap formed between the support beam and two adjacent protrusions.

[0018] In this way, the accommodation gaps formed between the support beam and two adjacent protrusions are disposed opposite to each other, which is beneficial to reducing the possibility of the support beam interfering with the installation of the support member.

[0019] In some embodiments, the box cover is located on one side of the battery cell along the first direction. Along the first direction, the height of the protrusion is greater than or equal to 1.5 mm and less than or equal to 22 mm.

[0020] In this way, the height of the protrusion is greater than or equal to 1.5 mm, so that the height of the protrusion is not too small, and the space between the box cover and the battery cell is not too small, which is beneficial to optimizing the internal space layout of the battery device; the height of the protrusion is less than or equal to 22 mm, so that the height of the protrusion is not too large, and the space between the box cover and the battery cell is not too large, which is beneficial to improving the volume energy density of the battery device.

[0021] In some embodiments, the battery cell assembly includes a plurality of the battery cells; The battery cell assembly further includes a bus bar, and the bus bar is electrically connected to the pole posts of two of the battery cells to electrically connect the two battery cells; The box cover is located on one side of the battery cell along the first direction; along the first direction, the bus bar is clamped between the protrusion and the pole post.

[0022] By providing the bus bar, on the one hand, a plurality of battery cells can be formed into a battery cell assembly in a series, parallel or hybrid connection manner to provide the required voltage and capacity; on the other hand, a sufficiently large contact plane can be provided for the protrusion to achieve a firm abutment between the protrusion and the battery cell, so that the protrusion can be better utilized to support the box cover, which helps to further improve the anti-deformation ability of the box cover and reduce the risk of abnormal noise caused by the deformation of the box cover.

[0023] The present application further provides an electrical device, and the electrical device includes the above battery device.

[0024] When the electrical device provided by the present application is in use, through the connection between the base body and the box cover and the connection between the protrusion and the battery cell assembly, the support member can support the box cover, which is beneficial to reducing the deformation of the box cover, and thus is beneficial to reducing the abnormal noise caused by the deformation of the box cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0026] Figure 1 Structural schematic diagram of an embodiment of an electrical device provided by the present application; Figure 2 Exploded view of an embodiment of a battery device provided by the present application; Figure 3 Stereogram of a battery cell in an embodiment of a battery device provided by the present application; Figure 4 Structural schematic diagram of an embodiment of a battery device provided by the present application; Figure 5 Structural schematic diagram of a support member in an embodiment of a battery device provided by the present application; Figure 6 Structural schematic diagram of an embodiment of a battery device provided by the present application in a top view direction.

[0027] Explanation of the reference numerals in the drawings: 10. Electrical device; 11. Controller; 12. Motor; 20. Battery device; 21. Box body; 211. Box cover; 212. Box body proper; 213. Accommodation cavity; 22. Battery cell assembly; 221. Battery cell; 222. Terminal post; 223. Pressure relief mechanism; 224. Bus bar; 23. Support member; 231. Substrate; 232. Protrusion; 233. Accommodation gap; 234. Cavity; 235. Connecting through hole; 236. Frustum section; 237. Arc section.

[0028] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, then the directional indications will also change accordingly.

[0031] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present application, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0032] During the use of battery devices such as battery packs and battery modules, abnormal noises sometimes occur.

[0033] Based on the above considerations, in order to reduce abnormal noises during use, the present application proposes a battery device and an electrical device. Among them, when the battery device and the electrical device are in use, they can support the box cover, which is beneficial to reducing the risk of abnormal noises caused by deformation of the box cover.

[0034] Next, the battery device and the electrical device proposed by the present application will be explained in detail by specific embodiments.

[0035] Among them, the electrical device 10 provided by the present application may include, but is not limited to, mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecraft, etc. Among them, spacecraft include airplanes, rockets, space shuttles, and spaceships, etc.

[0036] For the convenience of description in the following embodiments, the electrical device 10 is taken as a vehicle as an example for explanation. In the case of no obvious contradiction, the following embodiments can also be applied to electrical devices 10 other than vehicles.

[0037] Refer to Figure 1, the electrical device 10 provided by the present application includes a battery device 20. Among them, the vehicle is provided with a battery device 20, and the battery device 20 can be arranged at the bottom, head, tail, etc. of the vehicle. The battery device 20 can be used for power supply of the vehicle. For example, the battery device 20 can be used as the operating power source of the vehicle. This electrical device 10 of the vehicle may further include a controller 11 and a motor 12. The controller 11 is used to control the battery device 20 to supply power to the motor 12. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle.

[0038] Referring to Figure 2 , the battery device 20 includes a box body 21 and a battery cell assembly 22, and the battery cell assembly 22 is accommodated in the box body 21. Among them, the battery device 20 (Battery Apparatus) mentioned in the embodiments of the present application may include one or more battery cell assemblies 22, and the battery cell assembly 22 is used to provide voltage and capacity. The battery cell assembly 22 (Battery CellAssembly) may include a plurality of battery cells 221, and the plurality of battery cells 221 are connected in series, parallel, or in a hybrid connection through a busbar 224 (Busbar). Here, the hybrid connection can be understood to include series and parallel connections.

[0039] The battery cell assembly 22 can be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 221 to form an independent module. For example, the battery module can be formed by bundling a plurality of battery cells 221 with cable ties. In some embodiments, the battery cell assembly 22 can be accommodated in the box body 21 by being fixed to the box body 21. Of course, the battery cell assembly 22 can also include only one battery cell 221, and this embodiment does not limit this.

[0040] In some embodiments, the box body 21 may include a first box body and a second box body. The first box body and the second box body are buckled together, so that a closed space is formed inside the box body 21 to accommodate the above-mentioned battery cells 221 or battery cell assemblies 22. Here, "closed" means covering or closing, which can be sealed or non-sealed. In addition, the first box body can be a top cover or a bottom plate; the box body 21 can include a top cover, a frame, and a bottom plate, and the top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 21 to accommodate the above-mentioned battery cells 221 or battery cell assemblies 22. It can be understood that the first box body and the second box body can respectively have openings, so as to form the above-mentioned closed space by buckling through their respective openings; of course, it can also be that one of the first box body and the second box body has an opening. For example, the first box body does not have an opening and the second box body has an opening, and this embodiment does not limit this.

[0041] In some embodiments, the battery device may be a battery pack, which may include a box body 21 and one or more battery cell assemblies 22. The battery cell assemblies 22 are accommodated in the box body 21. In some embodiments, the above box body 21 may be part of the chassis structure of an electrical device 10 such as a vehicle. For example, the top cover of the box body 21 may become at least part of the vehicle's floor panel, or the frame of the box body 21 may become at least part of the vehicle's cross beams and longitudinal beams.

[0042] In some embodiments, the battery device 20 may also refer to an energy storage device, which may include one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include a plurality of battery cells 221, and the plurality of battery cells 221 are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to increase the capacity of the energy storage device. The energy storage device may include a box body 21, and at least one side of the box body 21 is provided with a door. The energy storage device may include an energy storage container, an energy storage cabinet, etc.

[0043] In some embodiments of the present application, the battery device 20 can not only be used as the operating power source of an electrical device 10 such as a vehicle, but also be used as the driving power source of the vehicle, thereby completely or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0044] Among them, referring to Figures 2 to 4 , in an embodiment of the present application, the battery device 20 includes a box body 21, a battery cell assembly 22, and a support member 23. The box body 21 includes a box cover 211 and a box body 212 having a receiving cavity 213. The box cover 211 covers the box body 212 to enclose the receiving cavity 213. For example, the box cover 211 covers the receiving cavity 213; the battery cell assembly 22 includes at least one battery cell 221; the support member 23 includes a base body 231 and a protrusion 232 provided on the base body 231. The base body 231 is connected to the side of the box cover 211 facing the battery cell 221; the protrusion 232 protrudes in the direction facing the battery cell assembly 22, and the protrusion 232 contacts the battery cell assembly 22. For example: the battery cell assembly 22 includes a busbar 224 (as shown in Figure 6 ), the busbar 224 is used to connect the pole posts 222 of the battery cells 221, and the protrusion 232 may contact the above busbar 224, or contact the battery cell 221, etc. This embodiment does not limit this. In some embodiments, the busbar 224 may include a metal body and an insulating film. The metal body is connected to the pole post 222, and the insulating film may be provided on the side of the metal body facing away from the battery cell 221, for example, on the upper side; at this time, the protrusion 232 may contact the insulating film.

[0045] Among them, the lid 211 can be set as the above-mentioned first box body, the box body 212 can be set as the above-mentioned second box body, and the accommodating cavity 213 of the box body 212 can be formed by the internal space of the opening of the second box body. In addition, the lid 211 can be connected to the box body 212 by buckling, so as to cover the box body 212 to close the accommodating cavity 213.

[0046] The battery cell 221 is composed of a positive electrode, a negative electrode, a separator, an electrolyte, etc., and is charged and discharged through an electrochemical reaction; in addition, multiple battery cells 221 can be combined into a battery cell assembly 22 in series or parallel. Among them, the battery cell 221 can be set as a square shell battery, a cylindrical battery, a soft package battery, etc. Refer to Figure 3 The battery cell 221 is provided with a pole column 222, and the pole column 222 of the battery cell 221 includes a positive electrode and a negative electrode; among them, the pole column 222 can be connected to each bus bar 224 (Busbar) to achieve series connection, parallel connection or mixed connection between the battery cells 221.

[0047] Refer to Figure 4 and Figure 5 The support member 23 can be understood as a structure that supports between the lid 211 and the battery cell assembly 22. The base body 231 included in the support member 23 can be set as a flat plate, and the base body 231 can be fixed to the lid 211 by means of bonding, buckling, clamping, etc., for example, fixedly connected to the top flat plate of the lid 211. Refer to Figure 4 The lower side of the lid 211 faces the battery cell 221, and the base body 231 is connected to the lower side of the lid 211.

[0048] The protrusion 232 included in the support member 23 can be integrally formed or separately provided with the above-mentioned base body 231, and this embodiment does not limit this. Among them, refer to Figure 4 The lower side of the protrusion 232 faces the battery cell assembly 22, and the protrusion 232 protrudes downward. It can be understood that the protrusion 232 can be set as a solid structure, and of course the protrusion 232 can also be set as a hollow structure, and this embodiment does not limit this.

[0049] In the battery device 20 provided by the above embodiment, the connection between the base body 231 and the lid 211 is beneficial to improving the anti-deformation ability of the lid 211, and the contact between the protrusion 232 and the battery cell assembly 22 can support the lid 211, which is beneficial to further improving the anti-deformation ability of the lid 211. In this way, it is beneficial to reduce the risk of abnormal noise caused by the deformation of the lid 211.

[0050] In some embodiments, refer to Figure 3 and Figure 4, at least two protrusions 232 are provided on the base body 231, and an accommodation gap 233 is formed between two adjacent protrusions 232. The accommodation gap 233 communicates with the pressure relief mechanism 223 of the battery cell 221. Among them, the above-mentioned box cover 211 can be set as the top cover of the box body 21, and the pressure relief mechanism 223 can be correspondingly set at the top of the battery cell 221; of course, when the box cover 211 is set as the top cover of the box body 21, the pressure relief mechanism 223 can also be set at the bottom of the battery cell 221 and other positions, and this embodiment does not limit this. The accommodation gap 233 communicating with the pressure relief mechanism 223 of the battery cell 221 can be understood as that when thermal runaway occurs inside the battery cell 221 and the pressure relief mechanism 223 is opened, the gas-solid mixture flowing out from the pressure relief mechanism 223 can flow to the accommodation gap 233; it can also be understood that a flow channel is formed between the outlet of the pressure relief mechanism 223 and the accommodation gap 233.

[0051] In this embodiment, the gas-solid mixture discharged by the battery cell 221 through the pressure relief mechanism 223 under the condition of thermal runaway can flow into the accommodation gap 233 formed between two adjacent protrusions 232, so that the discharge space for the gas-solid mixture of thermal runaway of the battery device 20 is increased through the accommodation gap 233, thereby reducing the possibility of the gas-solid mixture of thermal runaway forming a local high pressure and reducing the cracking risk of the box body 21.

[0052] In some embodiments, referring to Figure 4 and Figure 6 , the battery cell 221 includes two pole columns 222, the pressure relief mechanism 223 is located between the two pole columns 222, and at least two protrusions 232 are arranged opposite to the two pole columns 222 of one battery cell 221, for example, they are arranged opposite in the up-down direction in Figure 4 . In some embodiments, the protrusion 232 can be connected to the side of the bus bar 224 facing away from the battery cell 221. For example, the protrusion 232 is used to connect the top side of the bus bar 224, and can be specifically connected by means of abutting, etc.; so that an accommodation gap 233 is arranged opposite to the space between the two pole columns 222 of the same battery cell 221. For example, Figure 4 the second accommodation gap 233 in

[0053] In this embodiment, the accommodation gap 233 and the space between the two pole columns 222 can jointly serve as the discharge space for the gas-solid mixture of thermal runaway, thereby further reducing the possibility of the gas-solid mixture of thermal runaway forming a local high pressure.

[0054] In some embodiments, referring to Figure 4 and Figure 5, a cavity 234 is formed between the above-mentioned protrusion 232 and the base body 231. In some embodiments, the box cover 211 is located on one side of the battery cell 221 along the first direction, and the first direction is set along the up-down direction in the figure; correspondingly, the cavity 234 can be arranged on the side of the protrusion 232 facing away from the battery cell 221. For example, the cavity 234 is arranged on the upper side of the protrusion 232. In this embodiment, the cavity 234 is beneficial to reducing the weight of the support member 23. On the one hand, it is beneficial to reducing the cost, and on the other hand, it is beneficial to reducing the influence of adding the support member 23 on the overall weight of the battery device 20.

[0055] In some embodiments, referring to Figure 5 , when a cavity 234 is formed between the protrusion 232 and the base body 231, at least one protrusion 232 is provided with a connecting through hole 235. For example, Figure 5 the leftmost protrusion 232 in is provided with a connecting through hole 235, and the connecting through hole 235 communicates the cavity 234 and the accommodation gap 233. It can be understood that the connecting through hole 235 penetrates through the shell wall of the protrusion 232 provided with the cavity 234, so that the cavity 234 and the accommodation gap 233 are communicated.

[0056] In this embodiment, the gas-solid mixture in thermal runaway can be discharged into the cavity 234 through the connecting through hole 235, so that the discharge space for the gas-solid mixture in thermal runaway is further increased through the cavity 234. It can be understood that the gas-solid mixture can be discharged into the accommodation gap 233, and the gas-solid mixture can also be discharged into the cavity 234, thereby further reducing the possibility of the gas-solid mixture in thermal runaway forming a local high pressure.

[0057] In some embodiments, the hardness of the protrusion 232 provided with the cavity 234 is less than the hardness of the base body 231. For example, the base body 231 can be made of hard plastic, wood board, etc., and the protrusion 232 can be made of soft plastic, rubber, etc.; for example, the base body 231 can be made of PP (polypropylene), and the protrusion 232 can be made of TPU (thermoplastic polyurethane rubber). It can be understood that in this embodiment, the protrusion 232 and the base body 231 can be integrally formed and then connected by bonding. Of course, the protrusion 232 and the base body 231 can also be integrally formed and then the relative hardness of the two can be changed through processes such as modification.

[0058] In this embodiment, the hardness of the base body 231 is greater than the hardness of the protrusion 232. On the one hand, it is beneficial to improving the strengthening effect of the protrusion 232 on the structural strength of the box cover 211, and on the other hand, it is beneficial to reducing the pressure of the protrusion 232 on the battery cell 221.

[0059] In some embodiments, the protrusion 232 is elastic. For example, the protrusion 232 can be made of materials such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyurethane (PU), etc., such as made of TPU (thermoplastic polyurethane rubber), etc., so as to have elasticity.

[0060] The elasticity of the protrusion 232 is beneficial to reducing the acting force between the protrusion 232 and the battery cell 221. It can be understood that the protrusion 232 is more likely to shrink, which is beneficial to reducing the extrusion acting force on the battery cell 221.

[0061] In some embodiments, the thickness of at least one of the base 231 and the protrusion 232 provided with the cavity 234 is greater than or equal to 0.3 mm and less than or equal to 6 mm. For example, the thickness of at least one of the base 231 and the protrusion 232 can be further made greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0062] In this embodiment, the thickness of the base 231 being greater than or equal to 0.3 mm is beneficial to improving the anti-deformation ability of the box cover 211 through the base 231; the thickness of the base 231 being less than or equal to 6 mm is beneficial to reducing the occupied space of the support member 23 and reducing the material cost of the support member 23. The thickness of the protrusion 232 provided with the cavity 234 being greater than or equal to 0.3 mm is beneficial to improving the support ability of the protrusion 232; the thickness of the protrusion 232 being less than or equal to 6 mm is beneficial to improving the deformation ability of the protrusion 232, thereby being beneficial to further reducing the extrusion acting force of the protrusion 232 on the battery cell assembly 22.

[0063] In some embodiments, referring to Figure 4 or Figure 5 , the box cover 211 is located on one side of the battery cell 221 along the first direction. For example, the first direction is along the up-down direction in the figure; along the first direction, the outer contour of the protrusion 232 gradually shrinks from the base 231 towards the direction close to the battery cell 221.

[0064] In this embodiment, the outer contour of the protrusion 232 gradually shrinks along the first direction, and the outer contour of the end of the protrusion 232 connected to the base 231 is larger than the outer contour of the end of the protrusion 232 facing the battery cell 221, which is beneficial to improving the support effect of the protrusion 232 on the base 231, thereby improving the anti-deformation ability of the box cover 211, and is beneficial to reducing the occupied space of the protrusion 232 in the space of the box body 212, so as to optimize the internal space layout of the battery device 20.

[0065] In some embodiments, referring to Figure 5, the protrusion 232 may include a frustum section 236 and an arc section 237. The frustum section 236 and the arc section 237 are arranged in sequence along the axial direction parallel to the pole column 222 and towards the battery cell 221. For example, the frustum section 236 and the arc section 237 are arranged in sequence in the downward direction in the figure. It can be understood that the frustum section 236 and the arc section 237 refer to that when observed from the outside, the frustum section 236 is in the shape of a frustum, and the arc section 237 is integrally arc-shaped, hemispherical or partially spherical. Among them, the inside of the frustum section 236 and the inside of the arc section 237 can be hollowed out respectively. For example, the protrusion 232 is provided with the above-mentioned cavity 234. In addition, the frustum section 236 and the arc section 237 can be integrally formed or separately formed, and this embodiment does not limit this.

[0066] In this embodiment, the protrusion 232 includes a frustum section 236, which is beneficial to further provide a larger space for other components of the battery device 20, and is further beneficial to increasing the accommodation gap 233 formed between two adjacent protrusions 232; it can be understood that the frustum section 236 has a smaller volume, so the corresponding accommodation gap 233 has a larger volume. In addition, the arc section 237 of the protrusion 232 has fewer corners, which is beneficial to reducing the risk of scratching other components.

[0067] In some embodiments, a support beam is provided in the accommodation cavity 213. For example, the support beam can be set as a beam body such as a cross beam or a longitudinal beam. The support beam is connected to the box body 212, and the support beam is disposed opposite to the accommodation gap 233 formed between two adjacent protrusions 232. For example, the support beam is disposed opposite to the accommodation gap 233 formed between two adjacent frustum sections 236, for example, disposed opposite in the up and down direction; it can be understood that a part of the support beam is accommodated in the accommodation gap 233 formed between two adjacent protrusions 232. For example, a part of the support beam is accommodated in the accommodation gap 233 formed between two adjacent frustum sections 236.

[0068] In this embodiment, the support beam is disposed opposite to the accommodation gap 233 formed between two adjacent protrusions 232 (such as the frustum section 236), which is beneficial to reducing the possibility of the support beam interfering with the installation of the support member 23. In addition, the support beam can obtain a larger installation space through the accommodation gap 233, which is beneficial to reducing the overall volume of the battery device 20.

[0069] In some embodiments, referring to Figure 5 , when the protrusion 232 is provided with the above-mentioned cavity 234, the protrusion 232 is set to be arc-shaped. For example Figure 5 the rightmost protrusion 232 in

[0070] In this embodiment, the arc-shaped protrusion 232 has a large deformation ability, which is beneficial to reducing the extrusion force of the protrusion 232 on the battery cell assembly 22.

[0071] In some embodiments, referring to Figure 4 and Figure 5 , along the above-mentioned first direction, for example, along the up-down direction in the figure, the height of the protrusion 232 is greater than or equal to 1.5 mm and less than or equal to 22 mm. For example, the height of the protrusion 232 can be further made greater than or equal to 2 mm and less than or equal to 20 mm.

[0072] In this embodiment, the height of the protrusion 232 is greater than or equal to 1.5 mm, so that the height of the protrusion 232 is not too small, and the space between the box cover 211 and the battery cell 221 is not too small, which is beneficial to optimizing the internal space layout of the battery device 20; the height of the protrusion 232 is less than or equal to 22 mm, so that the height of the protrusion 232 is not too large, and the space between the box cover 211 and the battery cell 221 is not too large, which is beneficial to improving the volume energy density of the battery device 20.

[0073] In some embodiments, referring to Figure 6 , the battery cell assembly 22 includes a plurality of battery cells 221; the battery cell assembly 22 further includes a bus bar 224, and the bus bar 224 electrically connects the pole posts 222 of two battery cells 221 to electrically connect the two battery cells 221; the box cover 211 is located on one side of the battery cell 221 along the first direction; along the first direction, the bus bar 224 is clamped between the protrusion 232 and the pole post 222.

[0074] By providing the bus bar 224, on the one hand, a plurality of battery cells 221 can be formed into a battery cell assembly 22 in a series, parallel or mixed connection manner to provide the required voltage and capacity; on the other hand, a sufficiently large contact plane can be provided for the protrusion 232 to achieve a firm abutment between the protrusion 232 and the battery cell 221, so that the protrusion 232 can be better used to support the box cover 211, which helps to further improve the anti-deformation ability of the box cover 211 and reduce the risk of abnormal noise caused by the deformation of the box cover 211.

[0075] In some embodiments, referring to Figure 6 , wherein Figure 6 shows a top view of a partial structure of a battery device in an embodiment; along the thickness direction of the battery cell 221, for example, along the up-down direction in Figure 6 , the protrusion 232 can be strip-shaped (for example, the protrusion 232 on the left side in the figure is strip-shaped extending along the up-down direction), so that the protrusion 232 abuts at least two bus bars 224 along the thickness direction of the battery cell 221. For example, Figure 6The protrusion 232 on the left side abuts three busbars 224 along the thickness direction of the battery cell 221 (the up-down direction in the figure), thereby reducing the number requirement of the protrusions 232.

[0076] Of course, along the thickness direction of the battery cell 221, for example, along Figure 6 the up-down direction in [reference], the end of the protrusion 232 can be circular (such as the protrusion 232 on the right side in the figure) or square, so that the protrusion 232 abuts only one busbar 224 along the thickness direction of the battery cell 221. For example, Figure 6 the protrusion 232 on the right side in [reference] abuts one busbar 224 along the thickness direction of the battery cell 221 (refer to the up-down direction in the figure), so that each protrusion 232 is more conducive to aligning with each busbar 224, for example, more conducive to aligning with the busbar 224 located at the edge.

[0077] Refer to Figure 4 and Figure 5, in an embodiment of the battery device 20 of the present application, the battery device 20 includes a box body 21, a battery cell assembly 22, and a support member 23. The box body 21 includes a box cover 211 and a box body 212 having a receiving cavity 213. The box cover 211 covers the box body 212 to enclose the receiving cavity 213. The battery cell assembly 22 includes at least one battery cell 221 and a bus bar 224. The bus bar 224 is used to connect the electrode posts 222 of the battery cell 221. The support member 23 includes a base body 231 and a protrusion 232 provided on the base body 231. The base body 231 is connected to the side of the box cover 211 facing the battery cell 221. The protrusion 232 protrudes in the direction towards the battery cell assembly 22, and the protrusion 232 contacts the battery cell assembly 22. At least two protrusions 232 are provided on the base body 231, and a receiving gap 233 is formed between two adjacent protrusions 232. The receiving gap 233 communicates with the pressure relief mechanism 223 of the battery cell 221. The battery cell 221 includes two electrode posts 222. The pressure relief mechanism 223 is located between the two electrode posts 222. The protrusion 232 is disposed opposite to the electrode post 222. The protrusion 232 is used to connect the side of the bus bar 224 facing away from the battery cell 221. One receiving gap 233 is disposed opposite to the space between the two electrode posts 222 of the same battery cell 221. In addition, a cavity 234 is formed between the protrusion 232 and the base body 231. At least one protrusion 232 is provided with a connecting through hole 235, and the connecting through hole 235 communicates the cavity 234 and the receiving gap 233. The hardness of the protrusion 232 is less than the hardness of the base body 231, and the protrusion 232 has elasticity. The thickness of at least one of the base body 231 and the protrusion 232 is greater than or equal to 0.5 mm and less than or equal to 5 mm. The box cover 211 is located on one side of the battery cell 221 along a first direction. Along the first direction, the outer contour of the protrusion 232 gradually shrinks. Some of the protrusions 232 include a frustum section 236 and an arc section 237. The frustum section 236 and the arc section 237 are sequentially arranged along the axial direction of the electrode post 222 and in the direction towards the battery cell 221. A support beam is provided in the receiving cavity 213. The support beam is connected to the box body 212, and the support beam is disposed opposite to the receiving gap 233 formed between two adjacent protrusions 232. Some of the protrusions 232 are arranged in an arc shape. Along the first direction, the height of the protrusion 232 is greater than or equal to 2 mm and less than or equal to 20 mm.

[0078] It can be understood that since the above-mentioned electrical equipment adopts all the technical solutions of all the embodiments of the above-mentioned battery device, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0079] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that, The battery device includes: a box body, the box body includes a box cover and a box main body having a receiving cavity, and the box cover covers the box main body to enclose the receiving cavity; a battery cell assembly, the battery cell assembly includes at least one battery cell; a support member, the support member includes a base body and a protrusion provided on the base body, and the base body is connected to a side of the box cover facing the battery cell; the protrusion protrudes in a direction facing the battery cell assembly, and the protrusion contacts the battery cell assembly; at least two of the protrusions are provided on the base body, and a receiving gap is formed between two adjacent protrusions, and the receiving gap communicates with a pressure relief mechanism of the battery cell; the battery cell includes two pole posts, the pressure relief mechanism is located between the two pole posts, and at least two of the protrusions are disposed opposite to the two pole posts of one battery cell, so that one receiving gap is disposed opposite to the space between the two pole posts of the same battery cell.

2. The battery device according to claim 1, wherein, A cavity is formed between the protrusion and the base body.

3. The battery device according to claim 2, characterized in that, At least one of the protrusions is provided with a connecting through hole, and the connecting through hole communicates the cavity and the receiving gap.

4. The battery device according to claim 2, characterized in that, The hardness of the protrusion is less than the hardness of the base body; and / or The protrusion has elasticity.

5. The battery device according to claim 2, wherein, The thickness of at least one of the base body and the protrusion is greater than or equal to 0.3 mm and less than or equal to 6 mm.

6. The battery device according to any one of claims 1 to 5, characterized in that, The box cover is located on one side of the battery cell along a first direction, and along the first direction, the outer contour of the protrusion gradually shrinks from the base body towards the direction close to the battery cell.

7. The battery device according to claim 6, wherein, A support beam is provided in the receiving cavity, the support beam is connected to the box main body, and the support beam is disposed opposite to the receiving gap formed between two adjacent protrusions.

8. The battery device according to any one of claims 1 to 5, characterized in that, The box cover is located on one side of the battery cell along a first direction, and along the first direction, the height of the protrusion is greater than or equal to 1.5 mm and less than or equal to 22 mm.

9. The battery device according to any one of claims 1 to 5, characterized in that, The battery cell assembly includes a plurality of the battery cells; The battery cell assembly further includes a bus bar, and the bus bar electrically connects the pole posts of two battery cells to electrically connect the two battery cells; The box cover is located on one side of the battery cell along a first direction; along the first direction, the bus bar is clamped between the protrusion and the pole post.

10. An electrical device, characterized in that, The electrical device includes the battery device according to any one of claims 1 to 9.

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