Bbattery device, electric device and energy storage device

Abstract

A battery device (100), an electric device and an energy storage device (2000). The battery device (100) comprises a plurality of battery cells (20), a busbar component (302), an isolation plate (301), and a support member (40), wherein each battery cell (20) comprises a casing (201), a terminal post (202), and a pressure relief portion (203), the pressure relief portion (203) and the terminal post (202) being disposed on one side wall (204) of the casing (201) in a first direction (F1); the busbar component (302) is used for connecting the terminal posts (202) of a plurality of battery cells (20); the isolation plate (301) is arranged on one side of the casing (201) in the first direction (F1), the isolation plate (301) is supported on a plurality of battery cells (20), and the isolation plate (301) is used for mounting the busbar component (302) and isolating the busbar component (302) from the side wall (204); and the support member (40) is arranged between the isolation plate (301) and the side wall (204); in the first direction (F1), the projection of the support member (40) and the projection of the pressure relief portion (203) are at least partially staggered.

Description

Battery device, electric device and energy storage device

[0001] Cross-reference to related applications

[0002] The present application is based on and claims priority to Chinese patent application No. 202421944562.7, filed on August 12, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of battery devices, in particular to a battery device, an electric device and an energy storage device. BACKGROUND

[0004] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, battery devices play an irreplaceable important role as the power source of electric vehicles. Among them, the battery device includes a plurality of battery monomers, and the reliability of the battery device needs to be improved.

[0005] SUMMARY

[0006] The utility model embodiment provides a battery device, electric device and energy storage device, the use reliability of battery device is higher.

[0007] In a first aspect, the utility model embodiment provides a battery device, which includes: a plurality of battery monomers, the battery monomers including a shell, a pole and a pressure relief part, a side wall of the shell in a first direction is provided with the pressure relief part and the pole; a current collection component, the current collection component is used for connecting the poles of a plurality of battery monomers; an isolation plate, the isolation plate is arranged on one side of the shell in the first direction, the isolation plate is supported by a plurality of battery monomers, the isolation plate is used for installing the current collection component and isolating the current collection component and the side wall; a support, the support is arranged between the isolation plate and the side wall, in the first direction, the projection of the support and the projection of the pressure relief part are at least partially staggered.

[0008] In the technical solution, the part of the isolation plate far from the pole post is spaced apart from the side wall to form a suspended part, and the support member is arranged between the suspended part and the side wall, so that the support member can support the suspended part of the isolation plate. On the one hand, the support member can reduce the collapse of the suspended part of the isolation plate or reduce the degree of collapse of the suspended part of the isolation plate, thereby reducing the problem of poor contact of the electrical connector on the collection assembly fixed to the suspended part of the isolation plate. On the other hand, due to the support of the support member, the pressure relief part is less likely to be blocked by the collapsed isolation plate, and the arrangement position of the support member is at least partially staggered with the pressure relief part, and the support member has little effect on the pressure relief process of the pressure relief part, thereby reducing the possibility of pressure relief failure of the battery monomer. Therefore, the use reliability of the battery device is better.

[0009] In some embodiments, the support member is provided in plurality, and each of the plurality of support members corresponds to one of the plurality of battery monomers; or one support member corresponds to a plurality of battery monomers.

[0010] In the technical solution, for the one-to-one correspondence between the plurality of support members and the plurality of battery monomers, the arrangement position of the support member relative to the battery monomer is consistent, and the support member is less likely to deviate from the battery monomer, so that the pressure relief part and the support member can be well staggered, the effect of the support member on the normal pressure relief process of the pressure relief part is reduced, and the possibility of the pressure relief part being blocked by the support member is reduced. For the one support member corresponding to a plurality of battery monomers, the number of support members is small, and the assembly speed is fast.

[0011] In some embodiments, at least one of the isolation plate and the side wall is provided separately from the support member and connected to the support member; or the side wall or the isolation plate is integrally formed with the support member.

[0012] In the technical solution, for the at least one of the isolation plate and the side wall connected to the support member, the structure of the isolation plate and the side wall is relatively simple, and the molding process is facilitated. For the side wall or the isolation plate integrally formed with the support member, the number of parts of the battery device is smaller, which is conducive to improving the assembly efficiency of the battery device.

[0013] In some embodiments, there is a gap between the isolation plate and the support member.

[0014] In the technical solution, the support member can reduce the possibility of the isolation plate collapsing, and at the same time, the gap between the support member and the isolation plate can form an exhaust passage, so that the pressure relief material discharged from the pressure relief part can be discharged through the gap between the support member and the isolation plate.

[0015] In some embodiments, in the first direction, the spacing between the isolation plate and the side wall is D1, the size of the support is D2, and |D1-D2|≤0.5mm.

[0016] In the technical solution described above, on the one hand, the support can maintain a low machining precision during production and processing, which is conducive to reducing the production cost of the support; on the other hand, the size difference between the plurality of supports will not be too large, which can reduce the possibility of the isolation plate being obviously uneven, and is conducive to making the isolation plate obtain a better supporting effect.

[0017] In some embodiments, the pole column is provided with two, and the two pole columns are arranged on the same side wall of the shell, and at least part of the support is arranged between the two pole columns.

[0018] In the technical solution described above, the support can support the overhanging part between the two pole columns; and arranging the two pole columns on the same side wall of the shell is conducive to grouping the battery monomers and reduces the grouping difficulty of the battery monomers.

[0019] In some embodiments, the support is at least partially arranged between the pressure relief part and the pole column.

[0020] In the technical solution described above, the support can play a role in blocking the pressure relief substances generated by the pressure relief part, reducing the possibility of the pressure relief substances contacting the pole column, or reducing the contact between the pressure relief substances and the pole column, thereby reducing the risk of the pole column being damaged due to the contact between the pressure relief substances and the pole column, and further triggering the internal short circuit of the battery device.

[0021] In some embodiments, at least part of the pressure relief part is arranged between the two pole columns.

[0022] In the technical solution described above, the pressure relief part corresponds to the overhanging part between the two pole columns, and the support supports the overhanging part, so that the overhanging part of the isolation plate is not easy to block the pressure relief part, thereby facilitating the pressure relief part to achieve a normal pressure relief process.

[0023] In some embodiments, the support and the pressure relief part are arranged apart in a direction perpendicular to the first direction.

[0024] In the technical solution described above, the support is not easy to block the pressure relief part, so that the pressure relief part can achieve a better pressure relief effect.

[0025] In some embodiments, the support has a through hole avoiding the pressure relief part, and the through hole penetrates the support along the first direction and is opposite to the pressure relief part.

[0026] In the technical solution, the support member is less likely to block the pressure relief part, so that the pressure relief part can achieve better pressure relief effect.

[0027] In some embodiments, the support member comprises a support ring arranged around the pressure relief part to define the through hole.

[0028] In the technical solution, when one of the plurality of battery monomers emits pressure relief substances due to thermal runaway, the support ring on the remaining battery monomers can play a certain blocking role, which can reduce the possibility of damage to the pressure relief part caused by the contact between the pressure relief substances and the pressure relief part of the remaining battery monomers, thereby reducing the risk of chain thermal runaway and improving the use reliability of the battery device.

[0029] In some embodiments, the support member has a communication channel, one end of the communication channel is in communication with the through hole, and the support member has an opening on one side perpendicular to the first direction, and the other end of the communication channel is in communication with the opening.

[0030] In the technical solution, by providing the communication channel in the support member, the pressure relief substances generated by the pressure relief part can be guided to discharge from the preset path, thereby reducing the risk of contact between the pressure relief substances and other internal components of the battery device and damaging the other internal components of the battery device.

[0031] In some embodiments, the support member comprises a plurality of support blocks arranged at intervals, and the plurality of support blocks are used to support between the side wall and the isolation plate, and the pressure relief part is arranged between two support blocks.

[0032] In the technical solution, by arranging a plurality of support blocks arranged at intervals, the isolation plate can be supported at multiple points, which is conducive to improving the support effect while reducing the weight of the support member.

[0033] In some embodiments, the battery device further comprises an insulating member, the insulating member is arranged on the side wall, the insulating member has an avoiding hole, and the pole is arranged in the avoiding hole; wherein the support member is supported between the insulating member and the isolation plate; or / and, the support member is supported between the shell and the insulating member.

[0034] In the technical solution, the insulating member is arranged to increase the creepage distance between the shell and the external conductor, for example, the creepage distance between the busbar component and the shell.

[0035] In some embodiments, the insulating member and the support member are integrally formed; or the insulating member and the support member are separately arranged and connected.

[0036] In the technical scheme, the insulation member and the support member are integrally formed, so that the mounting step between the support member and the insulation member can be saved, the assembly process of the battery device is reduced, and the production cost of the battery device is reduced; and the insulation member and the support member are separately arranged and connected, so that the structure of the insulation member is simple and the insulation member is easy to process.

[0037] In some embodiments, the support member comprises an insulation material member, and the insulation material member has a melting point less than 300 DEG C.

[0038] In the technical scheme, the support member can be a plastic member, so that the pressure relief substance entering the through hole can melt the circumferential side wall of the support ring to form a pressure relief channel, so that the pressure relief substance can be discharged.

[0039] In some embodiments, the support member comprises a porous material member.

[0040] In the technical scheme, the support member has a light weight, which is beneficial to reduce the weight of the battery device, and the support member can also absorb the electrolyte sprayed from the pressure relief part during thermal runaway, reduce the pollution of the electrolyte to other components, and improve the insulation capacity of the battery device.

[0041] In some embodiments, the support member is a deformable member.

[0042] In the technical scheme, the possibility that the manufacturing error of the support member affects the assembly of the isolation plate on the battery monomer can be reduced, and the assembly reliability of the battery device is improved.

[0043] In some embodiments, the isolation plate has an opening region, the battery monomer has a pressure relief part, and the opening region communicates with the pressure relief part.

[0044] In the technical scheme, the opening region is arranged on the isolation plate, and the opening region communicates with the pressure relief part, so that the pressure relief substance discharged from the pressure relief part can be directly discharged from the opening region, which is beneficial to reduce the discharge resistance of the pressure relief substance, increase the discharge speed of the pressure relief substance, and reduce the possibility that the pressure relief substance diffuses to the surrounding and contacts the surrounding battery monomer.

[0045] In a second aspect, the utility model embodiment further provides a kind of electric device, comprising the battery device described above, and the battery device is used to provide electric energy for the electric device.

[0046] In the technical scheme, since the use reliability of the battery device is improved, the working reliability of the electric device is improved.

[0047] In a third aspect, the utility model discloses a kind of energy storage devices, comprising the multiple battery devices of above.

[0048] In the above technical solution, since the use reliability of the battery device is improved, the working reliability of the energy storage device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0049] Fig. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application;

[0050] Fig. 2 is an exploded view of a battery device according to some embodiments of the present application;

[0051] Fig. 3 is a structural schematic diagram of a battery module according to some embodiments of the present application;

[0052] Fig. 4 is a structural schematic diagram of a battery cell according to some embodiments of the present application;

[0053] Fig. 5 is a structural schematic diagram of a battery cell according to some embodiments of the present application;

[0054] Fig. 6 is a structural schematic diagram of a battery cell connected to a separation plate according to some embodiments of the present application;

[0055] Fig. 7 is a structural schematic diagram of an energy storage device according to some embodiments of the present application.

[0056] Reference signs: vehicle 1000; energy storage device 2000; battery device 100; controller 200; motor 300; box body 10; first box body 101; second box body 102; battery cell 20; shell 201; pole 202; pressure relief portion 203; side wall 204; separation plate 301; current collection component 302; nickel sheet 303; collection assembly 304; support 40; through hole 401; support ring 402; communication passage 403; opening 404; support block 405; insulating member 50; avoidance hole 501; first portion 502; second portion 503; third portion 504; first direction F1. DETAILED DESCRIPTION

[0057] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, and other references mentioned in this specification are herein incorporated by reference in their entirety for the purpose of describing and disclosing, for example, the methodologies described in such publications, which might provide useful background to the present application. In this application, the use of "or" means "and / or" unless specifically stated otherwise. In the description of the application, the use of "a" or "an" means "one or more", unless otherwise specifically stated.

[0059] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily referring to a common or identical embodiment, although they can be.

[0060] In the description of the application, it should be explained that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0061] In the application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B, and the existence of B alone. In addition, the character " / " in the application generally represents that the front and rear associated objects have an "or" relationship.

[0062] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the application shown in the drawings, and the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the application.

[0063] In the application, "a plurality of" means two or more (including two).

[0064] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0065] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0066] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into a separate module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0067] In some embodiments, the battery apparatus can be a battery pack including a case and one or more battery cell assemblies accommodated in the case.

[0068] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the case by fixing the battery module in the case.

[0069] As an example, the battery cell assembly can also be accommodated in the case by directly fixing a plurality of battery cells in the case.

[0070] As an example, the case can include a first case and a second case. The first case and the second case are coupled so that an enclosed space is formed inside the case to accommodate the battery cell assembly. Here, the enclosed means covered or closed, and can be sealed or unsealed. The first case can be a top cover or a bottom plate.

[0071] As an example, the case can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that an enclosed space is formed inside the case to accommodate the battery cell assembly.

[0072] In some embodiments, the case can be a part of a chassis structure of a vehicle. For example, a part of the case can be at least a part of a floor of the vehicle, or a part of the case can be at least a part of a cross beam and a longitudinal beam of the vehicle.

[0073] The embodiments of the present application provide a kind of energy storage device, including one or more battery cluster (Battery Cluster) to promote the voltage and capacity of energy storage device. Battery cluster can include multiple battery devices, multiple battery devices are connected in series by busbar component to improve the voltage of energy storage device. When energy storage device includes multiple battery clusters, multiple battery clusters are connected in parallel to improve the capacity of energy storage device.

[0074] In the present application, the battery monomer can include lithium ion secondary battery, lithium ion primary battery, lithium-sulfur battery, sodium lithium ion battery, sodium ion battery, magnesium ion battery or solid-state battery, etc., and the embodiments of the present application are not limited to this. The battery monomer can be in the shape of a cylinder, a cuboid or other shapes, etc., and the embodiments of the present application are not limited to this.

[0075] The battery monomer includes a shell, an electrode component and an electrolyte (in a solid-state battery, it can be a solid-state electrolyte layer located between the positive and negative electrode sheets), the electrode component includes at least one electrode assembly, the electrode assembly and the electrolyte are both accommodated in the shell, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator film (which can be omitted in a solid-state battery). The battery monomer mainly works by moving metal ions between the positive and negative electrode sheets.

[0076] The positive electrode sheet includes a positive current collector and a positive active material layer, the positive active material layer is coated on the surface of the positive current collector, and the positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer, and the positive current collector without the positive active material layer serves as a positive tab sheet. Taking a lithium ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc.

[0077] The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer, and the negative current collector without the negative active material layer serves as a negative tab sheet. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. The material of the separator film can be PP, polypropylene or PE, polyethylene, etc. The electrode assembly mentioned in the embodiments of the present application is a winding or laminated structure.

[0078] The electrode assembly can be a winding structure or a laminated structure. During processing, the positive electrode sheet, the negative electrode sheet and the separator film are wound or laminated in sequence to obtain the electrode assembly. In the electrode assembly, multiple positive tabs are laminated together and electrically connected with the positive pole assembly, and multiple negative tabs are laminated together and electrically connected with the negative pole assembly.

[0079] In the related art, a battery device includes a busbar component and an isolation plate. The busbar component is used to connect the pole of a plurality of battery monomers to achieve series connection, parallel connection or mixed connection among the plurality of battery monomers. The mixed connection means that there are both series connection and parallel connection among the plurality of battery monomers. The isolation plate is supported on the pole of the battery monomer. The isolation plate is used to support and fix the busbar component, and is used to isolate the busbar component and the shell of the battery monomer. The isolation plate is provided with a collection assembly, such as a flexible circuit board. The collection assembly is used to collect voltage and temperature data of the battery monomer and the like. The busbar component is connected with the collection assembly through an electrical connector (for example, a nickel sheet 303 in FIG. 3).

[0080] The part of the isolation plate that is not supported on the pole is usually spaced apart from the side wall of the shell of the battery monomer, that is, the part of the isolation plate is suspended. At the same time, in order to reduce the weight of the isolation plate, the thickness of the isolation plate is usually not too thick, and therefore the structural strength is low. During long-term use, the suspended part of the isolation plate away from the pole may have a collapse problem. On the one hand, the collapsed part of the isolation plate reduces the pressure relief passage area on the outside of the pressure relief part, reduces the discharge speed of the pressure relief material, and in some cases, may block the pressure relief part, causing the pressure relief part to fail. Secondly, the flexible circuit board is fixed on the isolation plate, and the nickel sheet is connected to the flexible circuit board. If the isolation plate collapses, the flexible circuit board will also collapse, and the nickel sheet connected to the flexible circuit board may be separated from the flexible circuit board, causing poor contact and reducing the use reliability of the battery device.

[0081] In view of this, embodiments of the present application provide a battery device. The battery device includes a plurality of battery monomers, a busbar component, an isolation plate and a support. The battery monomer includes a shell, a pole and a pressure relief part. The side wall of the shell in a first direction is provided with the pressure relief part and the pole. The busbar component is used to connect the poles of the plurality of battery monomers. The isolation plate is arranged on one side of the shell in the first direction. The isolation plate is supported by the plurality of battery monomers. The isolation plate is used to mount the busbar component and isolate the busbar component and the side wall. The support is arranged between the isolation plate and the side wall. In the first direction, the projection of the support and the projection of the pressure relief part are at least partially staggered.

[0082] In the battery device with the above structure, the part of the isolation plate far from the pole post is spaced apart from the side wall to form a suspended part, and the support member is arranged between the suspended part and the side wall, so that the support member can support the suspended part of the isolation plate. On the one hand, the problem of collapse of the suspended part of the isolation plate can be reduced or the degree of collapse of the suspended part of the isolation plate can be reduced, and in turn, the problem of poor contact of the electrical connector on the collection assembly fixed to the suspended part of the isolation plate can be reduced. On the other hand, due to the support of the support member, the isolation plate is not easy to be blocked by the collapsed isolation plate, and the arrangement position of the support member is at least partially staggered with the pressure relief part, the support member has little influence on the pressure relief process of the pressure relief part, thereby facilitating to reduce the possibility of pressure relief failure of the battery monomer. Therefore, the use reliability of the battery device is better.

[0083] The technical solutions described in the embodiments of the application are suitable for battery devices, and power consumption devices and energy storage devices using the battery devices.

[0084] The power consumption device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer, etc. The embodiments of the application do not specially limit the above power consumption devices.

[0085] The energy storage device can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electric energy as needed and output the electric energy at an appropriate time. For example, the energy storage device can store electric energy at a low electricity consumption time, and provide electric energy for related users or electric equipment at a high electricity consumption time. The energy storage system provided by the embodiments of the application can be any power system that needs to use an energy storage device.

[0086] The following embodiments are described by taking the power consumption device as a vehicle for example for convenience of description.

[0087] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 is provided with a battery device 100, which can be arranged at a bottom, a head or a tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0088] The vehicle 1000 can further 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 demand of the vehicle 1000 during starting, navigation and driving.

[0089] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0090] Please refer to FIG. 7, which is a structural schematic diagram of an energy storage device 2000 provided by some embodiments of the present application. The energy storage device 2000 is provided with a battery device 100. In some embodiments, the energy storage device 2000 can be an energy storage container or an energy storage cabinet. In some embodiments, the energy storage device 2000 can include a cabinet body and one or more battery clusters. The battery clusters are accommodated in the cabinet body, and each battery cluster can include a plurality of battery devices 100.

[0091] Please refer to FIG. 2, which is an exploded view of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes a battery monomer 20 and a box body 10 for accommodating the battery monomer 20. The box body 10 can have various structural forms.

[0092] In some embodiments, the box body 10 can include a first box body 101 and a second box body 102. The first box body 101 and the second box body 102 are overlapped with each other, and together define an accommodation space for accommodating the battery monomer 20. The connection position of the first box body 101 and the second box body 102 can also be provided with a sealing member to achieve sealed connection of the first box body 101 and the second box body 102. For example, referring to FIG. 2, the first box body 101 and the second box body 102 can each be a hollow structure with one open side. The open side of the first box body 101 is overlapped with the open side of the second box body 102, thereby forming the box body 10 with the accommodation space. For another example, the second box body 102 can be a hollow structure with one open side, and the first box body 101 is in the form of a cover and can be overlapped with the open side of the second box body 102. The box body 10 can have various shapes, such as a cylindrical box body, a cuboid box body, etc.

[0093] Please refer to FIG. 3 to FIG. 5, FIG. 3 is a structural schematic diagram of a battery module provided by some embodiments of the present application; FIG. 4 is a structural schematic diagram of a battery cell 20 provided by some other embodiments of the present application; and FIG. 5 is a structural schematic diagram of a battery cell 20 provided by some other embodiments of the present application.

[0094] As shown in FIG. 3 to FIG. 5, the battery device 100 comprises a plurality of battery cells 20, a busbar component 302, a partition plate 301 and a support 40. The battery cell 20 comprises a shell 201, a pole 202 and a pressure relief part 203. The pressure relief part 203 and the pole 202 are arranged on one side wall 204 of the shell 201 in a first direction F1. The busbar component 302 is used to connect the poles 202 of the plurality of battery cells 20. The partition plate 301 is arranged on one side of the shell 201 in the first direction F1. The partition plate 301 supports the plurality of battery cells 20. The partition plate 301 is used to mount the busbar component 302 and isolate the busbar component 302 and the side wall 204. The support 40 is arranged between the partition plate 301 and the side wall 204. In the first direction F1, the projection of the support 40 and the projection of the pressure relief part 203 are at least partially staggered.

[0095] Exemplarily, the partition plate 301 can be used to connect and fix the busbar component 302 and fix a collection assembly 304. The collection assembly 304 is connected with the busbar component 302 through an electrical connector (for example, a nickel sheet 303) and is used to collect voltage of the busbar component 302 and temperature data of the battery cell 20.

[0096] The battery cell 20 can have the pressure relief part 203. When the internal pressure of the battery cell 20 is too large (for example, thermal runaway), the pressure relief part 203 is used to release the internal substances (for example, gas, liquid, particulate matter, etc.) of the battery cell 20, so as to reduce the internal pressure of the battery cell 20 and avoid the battery cell 20 from exploding due to too fast pressurization of the battery cell 20. For example, the pressure relief part 203 can be an explosion-proof valve, an explosion-proof sheet, etc.

[0097] The shell 201 can comprise a shell body and a shell cover. The pressure relief part 203 and the pole 202 can be arranged on the shell cover. Alternatively, the pressure relief part 203 and the pole 202 can also be arranged on any wall of the shell body. Exemplarily, only one pole 202 can be arranged on the side wall 204 of the shell 201 in the first direction F1. Alternatively, two poles 202 can be arranged on the side wall 204 of the shell 201 in the first direction F1.

[0098] The isolation plate 301 is supported on the plurality of battery monomers 20, wherein the isolation plate 301 can be supported on the pole column 202 through the busbar component 302, that is, the busbar component 302 is fixedly connected with the pole column 202 (for example, the isolation plate 301 is injection-moldedly connected with the busbar component 302, or the busbar component 302 is clamped with the isolation plate 301); or the isolation plate 301 can also be directly supported on the pole column 202. The isolation plate 301 isolates the busbar component 302 and the side wall 204 to reduce the possibility of electrical conduction between the busbar component 302 and the shell 201.

[0099] The part of the isolation plate 301 far away from the pole column 202 is spaced apart from the side wall 204 of the shell 201, for example, in order to facilitate processing, the isolation plate 301 is usually a plate member, and the pole column 202 is also usually protruded from the outer surface of the side wall 204, that is, the outer side wall surface of the side wall 204, and the shell 201 has a containing cavity for containing the electrode assembly, and the side of the side wall 204 away from the containing cavity is the outer side. Therefore, the part of the isolation plate 301 far away from the pole column 202 is spaced apart from the side wall 204, forming a suspended part. Alternatively, in other embodiments, the pole column 202 can also not protrude from the outer surface of the side wall 204, and the part of the isolation plate 301 for supporting on the pole column 202 is formed as a protruding part protruding towards the pole column 202, so that the part of the isolation plate 301 far away from the pole column 202 is spaced apart from the shell 201.

[0100] By making the projection of the support member 40 at least partially deviated from the projection of the pressure relief part 203, that is, the support member 40 is at least partially not located on the discharge path of the pressure relief part 203, the possibility that the support member 40 hinders the pressure relief part 203 from discharging the pressure relief substance can be reduced, so that the pressure relief part 203 can realize the pressure relief function of relieving the pressure inside the battery monomer 20.

[0101] In the above technical solution, the part of the isolation plate 301 far away from the pole column 202 is spaced apart from the side wall 204, forming a suspended part, and the support member 40 is arranged between the suspended part and the side wall 204, so that the support member 40 can support the suspended part of the isolation plate 301. On the one hand, the problem of collapse of the suspended part of the isolation plate 301 or the degree of collapse of the suspended part of the isolation plate 301 can be reduced, and the problem of poor contact of the electrical connecting member fixed on the suspended part of the isolation plate 301 can be reduced. On the other hand, due to the supporting action of the support member 40, the pressure relief part 203 is not prone to being blocked by the collapsed isolation plate 301, and the arrangement position of the support member 40 is at least partially deviated from the pressure relief part 203, so that the support member 40 has little influence on the pressure relief process of the pressure relief part 203, thereby facilitating to reduce the possibility of pressure relief failure of the battery monomer 20. Therefore, the use reliability of the battery device 100 of the embodiment of the present application is better.

[0102] According to some embodiments of the present application, referring to Figure 3, the battery monomer 20 is provided with a plurality of, the supporting piece 40 is provided with a plurality of, and the plurality of supporting pieces 40 and the plurality of battery monomers 20 are one-to-one corresponding.

[0103] The plurality of battery monomers 20 can be directly connected in series, parallel or mixed together, and the whole formed by the plurality of battery monomers 20 is accommodated in the box body 101; of course, the plurality of battery monomers 20 can be first connected in series, parallel or mixed to form a battery module, and the plurality of battery modules are connected in series, parallel or mixed to form a whole and are accommodated in the box body 101.

[0104] The plurality of supporting pieces 40 and the plurality of battery monomers 20 are one-to-one corresponding, that is, during assembly, one supporting piece 40 is arranged on one battery monomer 20, and then the plurality of battery monomers 20 are stacked together and connected with the isolation plate 301 to form the battery device 100.

[0105] In the above technical solution, the supporting piece 40 and the battery monomer 20 are one-to-one corresponding, so that when the supporting piece 40 is installed, the installation position of the supporting piece 40 can be positioned based on one battery monomer 20, the setting position of the supporting piece 40 relative to the battery monomer 20 is good in consistency, the supporting piece 40 is not easy to deviate relative to the battery monomer 20, so that the pressure relief part 203 and the supporting piece 40 can be well staggered, the influence of the supporting piece 40 on the normal pressure relief process of the pressure relief part 203 is reduced, and the possibility of the pressure relief part 203 being blocked by the supporting piece 40 is reduced. In addition, since the supporting piece 40 and the battery monomer 20 are one-to-one corresponding, the supporting piece 40 does not need to be designed with a suitable length according to the size of the isolation plate 301 or the number of battery monomers 20, the universality of the supporting piece 40 is better, and the production efficiency is improved.

[0106] According to some embodiments of the present application, one supporting piece 40 and a plurality of battery monomers 20 are corresponding.

[0107] For example, the supporting piece 40 can be long strip, the plurality of battery monomers 20 are stacked along the set direction, the supporting piece 40 extends along the set direction, and one supporting piece 40 is arranged between the whole formed by the plurality of battery monomers 20 and the isolation plate 301, but is not limited thereto, and the supporting piece 40 can also be irregular in shape.

[0108] In the above technical solution, one supporting piece 40 is supported between the whole formed by the plurality of battery monomers 20 and the isolation plate 301, so that the number of supporting pieces 40 is small, the assembly speed is fast, and the assembly steps are less.

[0109] According to some embodiments of the present application, at least one of the isolation plate 301 and the side wall 204 is separately provided and connected with the supporting piece 40.

[0110] That is, the support 40 can be fixedly connected with the isolation plate 301 only; or, the support 40 can be fixedly connected with the side wall 204 of the shell 201 only; or, the support 40 can be fixedly connected with both the shell 201 and the isolation plate 301. The support 40 connected with the shell 201 can abut against the isolation plate 301, or the support 40 connected with the shell 201 can have a small gap with the isolation plate 301, which is much smaller than the distance between the overhanging part of the isolation plate 301 and the side wall 204 in the first direction F1. The support 40 connected with the isolation plate 301 can abut against the shell 201, or the support 40 connected with the isolation plate 301 can have a small gap with the shell 201, which is much smaller than the distance between the overhanging part of the isolation plate 301 and the side wall 204 in the first direction F1.

[0111] For the embodiment in which the support 40 is fixedly connected with both the shell 201 and the isolation plate 301, the overhanging part of the isolation plate 301 can be more stably connected with the shell 201 through the support 40, so as to reduce the degree of vibration of the overhanging part of the isolation plate 301, and facilitate to reduce the possibility of fatigue damage of the connection point of the electrical connector on the isolation plate 301.

[0112] In the above technical solution, at least one of the isolation plate 301 and the side wall 204 is connected with the support 40, so that the structure of the isolation plate 301 and the shell 201 is relatively simple, and the molding processing is facilitated.

[0113] According to some embodiments of the present application, the side wall 204 or the isolation plate 301 is integrally formed with the support 40.

[0114] That is, at least part of the support 40 and the shell 201 is an integral part; or, the support 40 and the isolation plate 301 are an integral part.

[0115] In the above technical solution, the side wall 204 or the isolation plate 301 is integrally formed with the support 40, so that the number of parts of the battery device 100 is less, and the assembly efficiency of the battery device 100 is facilitated to be improved.

[0116] According to some embodiments of the present application, referring to FIG. 6, the isolation plate 301 and the support 40 have a gap therebetween.

[0117] It should be noted that the gap between the isolation plate 301 and the support 40 is much smaller than the distance between the isolation plate 301 and the side wall 204, so that the support 40 can form a supporting effect on the overhanging part of the isolation plate 301, and reduce the possibility of the overhanging part of the isolation plate 301 to be deformed greatly.

[0118] In the above technical solution, the support 40 can reduce the possibility of the suspended part of the isolation plate 301 collapsing, and the gap between the support 40 and the isolation plate 301 can form an exhaust channel, so that the pressure relief substances discharged by the pressure relief part 203 can be discharged through the gap between the support 40 and the isolation plate 301.

[0119] According to some embodiments of the present application, as shown in FIG. 6, in the first direction F1, the distance between the isolation plate 301 and the side wall 204 is D1, and the size of the support 40 is D2, and |D1-D2|≤0.5mm.

[0120] Since the pole 202 protrudes from the outer surface of the side wall 204, the end of the pole 202 located outside the shell 201 is used to connect with the busbar component 302 or the isolation plate 301, and the isolation plate 301 is usually a flat plate, so that the part of the isolation plate 301 away from the pole 202 will be in a suspended state and prone to collapse. By arranging the support 40 between the shell 201 and the isolation plate 301, the support 40 can support the suspended part of the isolation plate 301, so that the suspended part of the isolation plate 301 is not prone to collapse.

[0121] In the first direction F1, the distance between the isolation plate 301 and the side wall 204 is D1, and the size of the support 40 is D2, and |D1-D2|≤0.5mm. For example, the absolute value of the difference between D2 and D1 can be 0.5mm, 0.4mm, 0.3mm, 0.2mm, 0.1mm or any value between any two of them.

[0122] |D1-D2|≤0.5mm, that is, in the first direction F1, the size D2 of the support 40 can be slightly larger than the distance D1 between the isolation plate 301 and the side wall 204, or the size D2 of the support 40 can be slightly smaller than the distance D1 between the isolation plate 301 and the side wall 204, or the size D2 of the support 40 can be equal to the distance D1 between the isolation plate 301 and the side wall 204.

[0123] The absolute value of the difference between the size D2 of the support 40 and the distance D1 between the isolation plate 301 and the side wall 204 is within the range, on the one hand, the support 40 can maintain low machining precision during production and processing, which is beneficial to reduce the production cost of the support 40; on the other hand, the size difference between the plurality of supports 40 will not be too large, which can reduce the possibility of the isolation plate 301 being obviously uneven, and is beneficial to make the isolation plate 301 obtain better support effect.

[0124] According to some embodiments of the present application, referring to Figures 3 to 5, two pole posts 202 are provided, and the two pole posts 202 are arranged on the same side wall 204 of the shell 201, and at least part of the support member 40 is arranged between the two pole posts 202.

[0125] The support member 40 is arranged at least partially between the two pole posts 202, so that the support member 40 can support the suspended part between the two pole posts 202. The support member 40 can be arranged completely between the two pole posts 202, or only partially between the two pole posts 202.

[0126] Arranging the two pole posts 202 on the same side wall 204 of the shell 201 facilitates the grouping of the battery monomers 20 and reduces the difficulty of grouping the battery monomers 20, and at the same time facilitates the reduction of the size or number of the support member 40, thereby facilitating the reduction of the weight of the battery device 100.

[0127] According to some embodiments of the present application, referring to Figures 3 to 5, at least part of the pressure relief portion 203 is arranged between the two pole posts 202.

[0128] At least part of the pressure relief portion 203 is arranged between the two pole posts 202, that is, the pressure relief portion 203 is arranged near the middle part of the side wall 204, so as to facilitate the pressure relief substance to reach the pressure relief portion 203 and be discharged from the pressure relief portion 203 relatively quickly when the battery monomer 20 is in thermal runaway. The pressure relief portion 203 corresponds to the suspended part between the two pole posts 202, and the support member 40 supports the suspended part, so that the suspended part of the isolation plate 301 is not easy to block the pressure relief portion 203, so as to facilitate the pressure relief portion 203 to realize the normal pressure relief process.

[0129] According to some embodiments of the present application, the support member 40 is arranged at least partially between the pressure relief portion 203 and the pole post 202.

[0130] For example, referring to Figure 4, the support member 40 is arranged around the pressure relief portion 203, so that part of the support member 40 is arranged between the pressure relief portion 203 and the pole post 202. Alternatively, referring to Figure 5, the support member 40 includes a strip-shaped member, and the support member 40 in the form of a strip-shaped member is arranged between the pressure relief portion 203 and the pole post 202.

[0131] In this way, the support member 40 can play a role in blocking the pressure relief substance generated by the pressure relief portion 203, reducing the possibility of contact between the pressure relief substance and the pole post 202, or reducing the contact between the pressure relief substance and the pole post 202, thereby reducing the risk of damage to the pole post 202 caused by the contact between the pressure relief substance and the pole post 202, and further causing internal short circuit of the battery device 100.

[0132] According to some embodiments of the present application, as shown in FIG. 5, the support 40 and the pressure relief portion 203 are arranged apart from each other in the direction perpendicular to the first direction F1.

[0133] In other words, in the direction perpendicular to the first direction F1, the distance between the support 40 and the pressure relief portion 203 is greater than 0.

[0134] In this way, the support 40 is less likely to block the pressure relief portion 203, so that the pressure relief portion 203 can achieve better pressure relief effect. Meanwhile, when arranging the support 40, the support 40 and the pressure relief portion 203 are simply arranged apart from each other, without the need for accurate positioning of the support 40, which is conducive to reducing the difficulty of arranging the support 40.

[0135] According to some embodiments of the present application, as shown in FIG. 3 and FIG. 4, the support 40 has a through hole 401 which avoids the pressure relief portion 203, the through hole 401 penetrates the support 40 along the first direction F1 and is opposite to the pressure relief portion 203.

[0136] The through hole 401 can be an annular through hole, or the through hole 401 can also be a non-annular through hole. The through hole 401 can be completely opposite to the pressure relief portion 203, or the through hole 401 can also be partially misaligned with the pressure relief portion 203 in the direction perpendicular to the first direction F1. In the direction perpendicular to the first direction F1, the size of the through hole 401 can be equal to the size of the pressure relief portion 203, or the size of the through hole 401 can also be greater than the size of the pressure relief portion 203; or the size of the through hole 401 can be smaller than the size of the pressure relief portion 203.

[0137] By arranging the through hole 401 on the support 40, the through hole 401 avoids the pressure relief portion 203, so that the support 40 is less likely to block the pressure relief portion 203 or reduces the blocking degree of the support 40 on the pressure relief portion 203, so that the pressure relief portion 203 has better pressure relief capacity. The remaining part of the support 40 which is not provided with the through hole 401 supports the isolation plate 301, so that the support area of the support 40 on the isolation plate 301 is larger and the support effect is better.

[0138] According to some embodiments of the present application, as shown in FIG. 3, the support 40 can include a support ring 402 which is arranged around the pressure relief portion 203 to define the through hole 401.

[0139] That is, when the pressure relief part 203 discharges the pressure relief substance, the pressure relief substance can enter the through hole 401, and then the pressure relief substance can form a pressure relief channel through the melting of the support 40, so that the pressure relief substance can be discharged; or the pressure relief substance can be discharged through the communication channel 403 which is pre-set on the support ring 402 and communicates with the through hole 401; or the isolation plate 301 is provided with an opening area which communicates with the through hole 401, so that the pressure relief substance generated by the pressure relief part 203 can be discharged in sequence through the through hole 401 and the opening area.

[0140] The support ring 402 is arranged around the pressure relief part 203, so that when one of the plurality of battery monomers 20 discharges the pressure relief substance due to thermal runaway, the support ring 402 on the remaining battery monomers 20 can play a certain blocking role, and can reduce the possibility that the pressure relief substance contacts the pressure relief part 203 of the remaining battery monomers 20 and causes damage to the pressure relief part 203, thereby reducing the risk of chain thermal runaway and improving the use reliability of the battery device 100.

[0141] According to some embodiments of the present application, as shown in FIG. 4, the support 40 has a communication channel 403, one end of the communication channel 403 communicates with the through hole 401, and the support 40 has an opening 404 on one side perpendicular to the first direction, and the other end of the communication channel 403 communicates with the opening 404.

[0142] For example, the support 40 includes a support ring 402, the support ring 402 is arranged around the pressure relief part 203 to define the through hole 401, and the communication channel 403 is arranged on the circumferential side wall 204 of the support ring 402, so that when the pressure relief part 203 generates the pressure relief substance, the pressure relief substance can directly enter the through hole 401 and then enter the communication channel 403 and be discharged from the opening 404.

[0143] By providing the communication channel 403 and the opening 404 on the support 40, the pressure relief substance generated by the pressure relief part 203 can be guided to be discharged from the preset path, so as to reduce the risk that the pressure relief substance contacts other internal components of the battery device 100 and damages the other internal components of the battery device 100.

[0144] According to some embodiments of the present application, as shown in FIG. 5, the support 40 includes a plurality of support blocks 405 arranged at intervals, the plurality of support blocks 405 are used to support between the side wall 204 and the isolation plate 301, and the pressure relief part 203 is arranged between two support blocks 405.

[0145] For example, referring to FIG. 5, two support blocks 405 can be provided, each of which is arranged between the pressure relief portion 203 and the pole 202. Alternatively, three, four, five, or any other number of support blocks 405 can be provided. The support blocks 405 can also not be arranged between the pressure relief portion 203 and the pole 202. The pressure relief portion 203 is arranged between the two support blocks 405, so that the support blocks 405 are less likely to block the pressure relief portion 203, thereby allowing the pressure relief portion 203 to have better pressure relief capability.

[0146] By providing a plurality of support blocks 405 arranged at intervals, the isolation plate 301 can be supported at multiple points, which is conducive to improving the supporting effect while reducing the weight of the support member 40.

[0147] According to some embodiments of the present application, the battery monomer 20 further comprises an insulating member 50, the insulating member 50 is arranged on the side wall 204, the insulating member 50 has a relief hole 501, the pole 202 is arranged in the relief hole 501, and the support member 40 is arranged between the insulating member 50 and the isolation plate 301.

[0148] According to some embodiments of the present application, the battery monomer 20 further comprises an insulating member 50, the insulating member 50 is arranged on the side wall 204, the insulating member 50 has a relief hole 501, the pole 202 is arranged in the relief hole 501, and the support member 40 is arranged between the insulating member 50 and the isolation plate 301.

[0149] According to some embodiments of the present application, the battery monomer 20 further comprises an insulating member 50, the insulating member 50 is arranged on the side wall 204, the insulating member 50 has a relief hole 501, the pole 202 is arranged in the relief hole 501, and the support member 40 is arranged between the insulating member 50 and the isolation plate 301.

[0150] Referring to FIG. 4, the battery device 100 further comprises an insulating member 50, the insulating member 50 is arranged on the side wall 204, and the insulating member 50 is arranged to increase the creepage distance between the shell 201 and an external conductor, for example, the creepage distance between the busbar and the shell 201. In some cases, the insulating member 50 can also enhance the sealing of the battery monomer 20 and reduce the possibility of moisture or other liquids penetrating into the battery monomer 20.

[0151] The insulating member 50 has a relief hole 501, and the pole 202 is arranged in the relief hole 501, so that the insulating member 50 can be arranged on the side wall 204, and the insulating member 50 and the shell 201 are well connected.

[0152] For the embodiment that the support 40 is supported between the insulation 50 and the isolation plate 301, the arrangement of the support 40 does not change the original connection relationship between the insulation 50 and the shell 201, or in other words, the structure of the insulation 50 is not changed, so as to facilitate reducing the arrangement cost of the support 40.

[0153] For the embodiment that the support 40 is supported between the insulation 50 and the isolation plate 301, the arrangement of the support 40 does not change the original connection relationship between the insulation 50 and the shell 201, or in other words, the structure of the insulation 50 is not changed, so as to facilitate reducing the arrangement cost of the support 40.

[0154] For the embodiment that the support 40 is supported between the insulation 50 and the isolation plate 301, the arrangement of the support 40 does not change the original connection relationship between the insulation 50 and the shell 201, or in other words, the structure of the insulation 50 is not changed, so as to facilitate reducing the arrangement cost of the support 40.

[0155] According to some embodiments of the utility model, can refer to the drawing 4, the insulation 50 and the support 40 are integrally formed. For example, the support 40 can be the protruding bump that is relative to the insulation 50 along the first direction F1 towards or away from the side wall 204, and the bump is integrally formed with the insulation 50. Or, can refer to the drawing 4, the insulation 50 includes the first part 502, the support 40 includes the second part 503 and the third part 504, the second part 503 is connected between the first part 502 and the third part 504, the first part 502 covers the side wall 204, and the third part 504 is arranged on the side of the first part 502 away from the side wall 204.

[0156] For example, the support 40 and the insulation 50 are integrally stamped and formed.

[0157] For the integrally formed insulation 50 and support 40, the installation step between the insulation 50 and the support 40 can be saved, which is beneficial to reduce the assembly process of the battery device 100 and reduce the production cost of the battery device 100.

[0158] According to some embodiments of the utility model, the insulation 50 and the support 40 are separately arranged and connected. That is, the support 40 and the insulation 50 can be two pieces separately formed and then connected together. For the separately arranged and connected insulation 50 and support 40, the structure of the insulation 50 is relatively simple and easy to process.

[0159] Further, the free edge of the second portion 503 and the free edge of the third portion 504 define an opening 404, and the second portion 503 and the third portion 504 define a communication passage 403 that communicates the pressure relief portion 203 and the opening 404, so that the pressure relief substance discharged by the pressure relief portion 203 can be discharged via the communication passage 403 and the opening 404.

[0160] According to some embodiments of the present application, the support 40 comprises an insulating material piece, and the melting point of the insulating material piece is less than 300 DEG C. The support 40 comprises the insulating material piece, so as to facilitate increasing the creepage distance between the shell 201 and the busbar component 302.

[0161] Exemplarily, the support 40 can be a plastic piece, so as to have better insulation effect; meanwhile, the plastic piece has a lower melting point and can be melted by the pressure relief substance. For example, the melting point of the plastic piece is less than 200 DEG C, but is not limited thereto, and according to the different temperatures of the pressure relief substances discharged by different kinds of battery devices, the melting point of the corresponding plastic piece can also be different.

[0162] For example, the support ring 402 can be a plastic piece, so that the pressure relief substance entering the through hole 401 can melt the circumferential side wall 204 of the support ring 402 to form a pressure relief passage, so that the pressure relief substance can be discharged. In addition, it can be understood that the support 40 arranged without surrounding the pressure relief portion 203 can also be a plastic piece, so as to have better insulation performance and lighter mass.

[0163] In some embodiments, the support 40 comprises a porous material piece.

[0164] Exemplarily, the support 40 can be a foam piece, a porous plastic piece, a porous ceramic piece, etc.

[0165] The support 40 of the porous material piece has a lighter mass, which is beneficial to reducing the mass of the battery device 100, and the support 40 of the porous material piece can also absorb the electrolyte sprayed by the pressure relief portion 203 in thermal runaway, reduce the pollution of the electrolyte to other components, and improve the insulation capability of the battery device 100 in thermal runaway.

[0166] In other embodiments, the support 40 can also be a hard material piece, a hollow piece, a bracket piece, etc., which is not specifically limited herein.

[0167] In some embodiments, the support 40 can comprise a deformable piece.

[0168] Exemplarily, for example, the support 40 can be foam, an elastic piece, a sponge, rubber, etc.

[0169] That is, the support 40 has a certain deformability, and will be deformed when being pressed. Due to the existence of machining errors, the sizes of the supports arranged on the plurality of battery monomers 20 can be different, and the deformable support 40 is adopted as the support 40, so that when the size of the support 40 is large, the support 40 can be compressed, thereby reducing the possibility that the assembly of the isolation plate 301 is affected by the size of the support 40 in the first direction F1. Therefore, the deformable support 40 can reduce the possibility that the assembly of the isolation plate 301 on the battery monomer 20 is affected by the manufacturing error of the support 40, and improve the assembly reliability of the battery device 100.

[0170] According to some embodiments of the present application, the isolation plate 301 has an opening area, and the battery monomer 20 has a pressure relief portion 203, and the opening area is in communication with the pressure relief portion 203.

[0171] For example, the pressure relief portion 203 is directly arranged opposite to the opening area in the first direction F1, so as to make the opening area and the pressure relief portion 203 communicate. Alternatively, the opening area and the through hole 401 are arranged opposite in the first direction F1, so that the opening area communicates with the pressure relief portion 203 through the through hole 401.

[0172] By arranging the opening area on the isolation plate 301, and the opening area being in communication with the pressure relief portion 203, the pressure relief substances discharged by the pressure relief portion 203 can be directly discharged from the opening area, which is beneficial to reduce the discharge resistance of the pressure relief substances, increase the discharge speed of the pressure relief substances, and reduce the possibility that the pressure relief substances diffuse to the surrounding and contact the surrounding battery monomers 20.

[0173] According to the second aspect of the embodiments of the present application, the embodiments of the present application also provide a power utilization device, which comprises the battery device 100 of any one of the above-mentioned schemes, and the battery device 100 is used to provide electric energy for the power utilization device.

[0174] According to the power utilization device of the second aspect of the present application, the battery device 100 is used to provide power for the power utilization device. Thus, by using the above-mentioned battery device 100, the part of the isolation plate 301 far away from the pole 202 is spaced apart from the side wall 204 to form a suspended part, and the support member 40 is arranged between the suspended part and the side wall 204, so that the support member 40 can support the suspended part of the isolation plate 301. On the one hand, the problem of collapse of the suspended part of the isolation plate 301 can be reduced or the degree of collapse of the suspended part of the isolation plate 301 can be reduced, and thus the problem of poor contact of the electrical connecting member fixed to the suspended part of the isolation plate 301 can be reduced. On the other hand, due to the supporting effect of the support member 40, the pressure relief part 203 is not easy to be blocked by the collapsed isolation plate 301, and the arrangement position of the support member 40 is at least partially staggered with the pressure relief part 203, so as to facilitate reducing the possibility of pressure relief failure of the battery monomer 20. Therefore, the use reliability of the battery device 100 of the present application is better.

[0175] According to the third aspect of the present application, the present application further provides a power storage device 2000, which comprises the battery device 100 of any one of the above-mentioned schemes. Thus, by using the above-mentioned battery device 100, the part of the isolation plate 301 far away from the pole 202 is spaced apart from the side wall 204 to form a suspended part, and the support member 40 is arranged between the suspended part and the side wall 204, so that the support member 40 can support the suspended part of the isolation plate 301. On the one hand, the problem of collapse of the suspended part of the isolation plate 301 can be reduced or the degree of collapse of the suspended part of the isolation plate 301 can be reduced, and thus the problem of poor contact of the electrical connecting member fixed to the suspended part of the isolation plate 301 can be reduced. On the other hand, due to the supporting effect of the support member 40, the pressure relief part 203 is not easy to be blocked by the collapsed isolation plate 301, and the arrangement position of the support member 40 is at least partially staggered with the pressure relief part 203, so as to facilitate reducing the possibility of pressure relief failure of the battery monomer 20. Therefore, the use reliability of the power storage device 2000 of the present application is better.

[0176] The battery device 100 according to the three specific embodiments of the present application and the vehicle 1000 having the same will be described below with reference to the accompanying drawings.

[0177] Embodiment one

[0178] As shown in FIGS. 1-3, the vehicle 1000 includes a battery device 100, the battery device 100 including a plurality of battery cells 20, a plurality of busbar components 302, a plurality of isolation plates 301, and a plurality of support members 40, the plurality of battery cells 20 including a plurality of housings 201, a plurality of positive posts 202, and a plurality of pressure relief portions 203, the plurality of housings 201 having a plurality of side walls 204 on one side in a first direction F1, the plurality of side walls 204 having the plurality of pressure relief portions 203 and the plurality of positive posts 202, the plurality of busbar components 302 configured to connect the plurality of positive posts 202 of the plurality of battery cells 20, the plurality of isolation plates 301 disposed on one side of the plurality of housings 201 in the first direction F1, the plurality of isolation plates 301 configured to support the plurality of battery cells 20, the plurality of isolation plates 301 configured to mount the plurality of busbar components 302 and isolate the plurality of busbar components 302 from the plurality of side walls 204, and the plurality of support members 40 disposed between the plurality of isolation plates 301 and the plurality of side walls 204, the plurality of support members 40 having a projection in the first direction F1 that is offset from a projection of the plurality of pressure relief portions 203.

[0179] The plurality of battery cells 20 are provided, and the plurality of support members 40 are provided, the plurality of support members 40 and the plurality of battery cells 20 being provided in one-to-one correspondence.

[0180] The plurality of positive posts 202 protrude from an outer surface of the plurality of side walls 204, the plurality of positive posts 202 are located at an end of the plurality of housings 201 outside the plurality of housings 201 and configured to connect the plurality of busbar components 302, a distance between the plurality of isolation plates 301 and the plurality of side walls 204 in the first direction F1 is D1, a size of the plurality of support members 40 is D2, and |D1-D2|≤0.5mm, which reduces the possibility of unevenness of the plurality of isolation plates.

[0181] The plurality of positive posts 202 are provided in two, the two positive posts 202 are provided on the same side wall 204 of the plurality of housings 201, a portion of the plurality of support members 40 is provided between the two positive posts 202, and the plurality of pressure relief portions 203 are provided between the two positive posts 202. The plurality of support members 40 include a support ring 402, the support ring 402 is arranged around the plurality of pressure relief portions 203 to define a through hole 401, the through hole 401 is opposite the plurality of pressure relief portions 203 along the first direction F1, the through hole 401 is configured to avoid the plurality of pressure relief portions 203, and the through hole 401 is a through hole for avoiding. The plurality of support members 40 include a plastic member.

[0182] Embodiment Two

[0183] As shown in FIG. 4, embodiment two is different from embodiment one in that the plurality of battery cells 20 further include an insulating member 50, the insulating member 50 is provided on the plurality of side walls 204, the insulating member 50 has an avoiding hole 501, and the plurality of positive posts 202 are provided in the avoiding hole 501; the plurality of support members 40 are integrally formed with the insulating member 50. The plurality of support members 40 have a communication channel 403, the communication channel 403 is in communication with the through hole 401, and the communication channel has an opening 404 perpendicular to one side in the first direction F1.

[0184] Embodiment Three

[0185] As shown in FIG. 5, the third embodiment is different from the first embodiment in that the support 40 comprises two support blocks 405 arranged at intervals, the support blocks 405 are arranged between the side walls 204 and the isolation plates 301, the pressure relief portion 203 is arranged between the two support blocks 405, and the support blocks 405 are arranged between the pressure relief portion 203 and the pole 202.

[0186] In the battery device 100, the isolation plates 301 are supported by the poles 202, and the parts of the isolation plates 301 between the poles 202 are suspended. Due to the insufficient strength of the isolation plates 301, the parts of the isolation plates 301 between the poles 202 may collapse, which causes the functional wires connected to the isolation plates 301 to be loose and poor in contact.

[0187] The application sets the support 40 on the parts of the top cover of the shell 201 between the poles 202, and the support 40 supports the isolation plates 301, so as to reduce the collapse of the isolation plates 301 and the poor contact of the wires. The support 40 avoids the position of the pressure relief portion 203, so as to reduce the influence of the support 40 on the exhaust of the pressure relief portion 203. The support 40 can be a foam structure, which is light in weight and can support. The insulating member 50 is arranged on the top cover and is integrally formed with the support 40. For example, the insulating member 50 and the support 40 can be formed by punching a pit on a plate member, so as to support. In this way, the process of pasting the foam can be reduced, the cost can be reduced, and the support 40 can be arranged between the pit and the shell 201 again, so as to enhance the support strength of the support 40 formed by the insulating member 50.

[0188] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0189] The preferred embodiments of the application have been described above, but the application is not limited to the above. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A battery device, wherein, The battery device comprises: a plurality of battery cells, each of which comprises a shell, a pole and a pressure relief part, wherein a side wall of the shell in a first direction is provided with the pressure relief part and the pole; a busbar component for connecting the poles of the plurality of battery cells; an isolation plate arranged on one side of the shell in the first direction, the isolation plate being supported by the plurality of battery cells, the isolation plate being used for mounting the busbar component and isolating the busbar component and the side wall; a support member arranged between the isolation plate and the side wall, wherein a projection of the support member and a projection of the pressure relief part are at least partially staggered in the first direction.

2. The battery device of claim 1, wherein, The support member is provided in plurality, and each of the plurality of support members corresponds to one of the plurality of battery cells; or one support member corresponds to a plurality of battery cells.

3. The battery device of claim 1, wherein, At least one of the isolation plate and the side wall is separately arranged with the support member and connected with the support member; or the side wall or the isolation plate is integrally formed with the support member.

4. The battery device of claim 1, wherein, The isolation plate and the support member have a gap therebetween.

5. The battery device of claim 1, wherein, In the first direction, a distance between the isolation plate and the side wall is D1, a size of the support member is D2, and |D1-D2|≤0.5mm.

6. The battery device of claim 1, wherein, The pole is provided in two, and the two poles are arranged on the same side wall of the shell, at least part of the support member is arranged between the two poles, and at least part of the pressure relief part is arranged between the two poles.

7. The battery device of claim 1, wherein, The support member and the pressure relief part are arranged to be spaced apart in a direction perpendicular to the first direction.

8. The battery device of claim 1, wherein, The support member has a through hole for avoiding the pressure relief part, the through hole penetrating through the support member along the first direction and being opposite to the pressure relief part.

9. The battery device of claim 8, wherein, The support member comprises a support ring arranged around the pressure relief part to define the through hole.

10. The battery device of claim 9, wherein, The support member has a communication channel, one end of the communication channel communicates with the through hole, and the support member has an opening on a side perpendicular to the first direction, and the other end of the communication channel communicates with the opening.

11. The battery device of claim 7, wherein, The support member comprises a plurality of support blocks arranged to be spaced apart, the plurality of support blocks are used for supporting between the side wall and the isolation plate, and the pressure relief part is arranged between two of the support blocks.

12. The battery device of claim 1, wherein, Further comprising an insulating member arranged on the side wall, the insulating member has an avoiding hole, and the pole is arranged in the avoiding hole; wherein the support member is supported between the insulating member and the isolation plate; or / and the support member is supported between the shell and the insulating member.

13. The battery device of claim 12, wherein, The insulating member and the support member are integrally formed; or the insulating member and the support member are separately arranged and connected.

14. The battery device of any one of claims 1-13, wherein, The support member comprises an insulating material member, and a melting point of the insulating material member is less than 300℃.

15. The battery device of any one of claims 1-13, wherein, The support member comprises a porous material member.

16. The battery device of any one of claims 1-13, wherein, The support member is a deformable member.

17. The battery device of claim 1, wherein, The isolation plate has an opening region, the battery cell has a pressure relief part, and the opening region communicates with the pressure relief part.

18. An electrical device, comprising: The battery device as claimed in any one of claims 1-17 is used to provide electric energy for the electric device.

19. An energy storage device, wherein, A plurality of battery devices as claimed in any one of claims 1-17.

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