Battery device, power utilization device and energy storage device

Abstract

The utility model discloses a battery device, a power utilization device and an energy storage device and belongs to the technical field of batteries. The battery device comprises a plurality of single batteries, a confluence component, an isolation plate and a supporting piece, each single battery comprises a shell, a pole and a pressure relief part, and the pressure relief part and the pole are arranged on the side wall of one side of the shell in the first direction; the confluence component is used for connecting poles of a plurality of battery monomers; the isolation plate is arranged on one side of the shell in the first direction, the isolation plate is supported on the plurality of battery monomers, and the isolation plate is used for mounting the confluence component and isolating the confluence component from the side wall; the supporting piece is arranged between the isolation plate and the side wall, and in the first direction, the projection of the supporting piece and the projection of the pressure relief part are at least partially staggered. According to the battery device, the supporting piece is arranged between the isolation plate and the side wall to support the isolation plate, so that the problem of collapse of the isolation plate is reduced, the problem of poor contact of the electric connecting piece caused by collapse of the isolation plate is reduced, and the use reliability of the battery device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery devices, and more specifically, to a battery device, an electrical device and an energy storage device. Background Art

[0002] In recent years, new energy vehicles have witnessed a leapfrog development. In the field of electric vehicles, as the power source of electric vehicles, battery devices play an irreplaceable and important role. Among them, the battery device includes a plurality of battery cells, and the reliability of the battery device needs to be improved. Summary of the Utility Model

[0003] An embodiment of the utility model provides a battery device, an electrical device and an energy storage device, and the battery device has higher usage reliability.

[0004] In a first aspect, an embodiment of the utility model provides a battery device, which includes: a plurality of battery cells, each battery cell including a housing, a pole column and a pressure relief part, and the pressure relief part and the pole column are provided on a side wall of the housing in a first direction; a busbar component for connecting the pole columns of the plurality of battery cells; a separator provided on one side of the housing in the first direction, the separator supporting the plurality of battery cells, and the separator being used for installing the busbar component and isolating between the busbar component and the side wall; a support member provided between the separator and the side wall, and in the first direction, at least part of the projection of the support member and the projection of the pressure relief part are staggered.

[0005] In the above technical solution, a part of the separator that is far from the pole column is spaced apart from the side wall to form a suspended part, and the support member is provided between the suspended part and the side wall. Thus, the support member can support the suspended part of the separator. On the one hand, it can reduce the problem that the suspended part of the separator is prone to collapse or reduce the degree of collapse of the suspended part of the separator, and further reduce the problem of poor contact of the electrical connection member on the acquisition component fixed on the suspended part of the separator. On the other hand, due to the supporting effect of the support member, the pressure relief part is not easily blocked by the collapsed separator, and the arrangement position of the support member is at least partially staggered from the pressure relief part, so the support member has little influence on the pressure relief process of the pressure relief part, which is beneficial to reducing the possibility of pressure relief failure of the battery cell. Therefore, the battery device of the present application has better usage reliability.

[0006] In some embodiments, a plurality of the support members are provided, and the plurality of support members are arranged in one-to-one correspondence with the plurality of battery cells; alternatively, one support member corresponds to the plurality of battery cells.

[0007] In the above technical solution, for the multiple support members and the multiple battery cells being arranged in one-to-one correspondence, during installation, the setting positions of the support members relative to the battery cells have good consistency, and it is not easy for the support members to shift relative to the battery cells. As a result, the pressure relief part and the support members can be well staggered, reducing the influence of the support members on the normal pressure relief process of the pressure relief part and reducing the possibility of the pressure relief part being blocked by the support members. For one support member corresponding to multiple battery cells, the number of support members is small, and the assembly speed is fast.

[0008] In some embodiments, at least one of the separator and the side wall is separately provided and connected to the support member; or, the side wall or the separator is integrally formed with the support member.

[0009] In the above technical solution, for at least one of the separator and the side wall being connected to the support member, in this way, the structures of the separator and the side wall are relatively simple and convenient for forming and processing. For the side wall or the separator being integrally formed with the support member, in this way, the number of components of the battery device is less, which is beneficial to improving the assembly efficiency of the battery device.

[0010] In some embodiments, there is a gap between the separator and the support member.

[0011] In the above technical solution, the support member can reduce the possibility of the separator having a large collapse. At the same time, the gap between the support member and the separator can form an exhaust passage, so that the pressure relief substances discharged from the pressure relief part can be discharged through the gap between the support member and the separator.

[0012] In some embodiments, in the first direction, the distance between the separator and the side wall is D1, the size of the support member is D2, and |D1 - D2| ≤ 0.5 mm.

[0013] In the above technical solution, on the one hand, during the production and processing of the support member, a relatively low processing accuracy can be maintained, which is beneficial to reducing the production cost of the support member. On the other hand, the size difference between multiple support members will not be too large, which can reduce the possibility of the separator being significantly uneven and is beneficial to enabling the separator to obtain a better support effect.

[0014] In some embodiments, there are two pole posts, and the two pole posts are arranged on the same side wall of the housing, and at least part of the support member is arranged between the two pole posts.

[0015] In the above technical solution, the support member can support the suspended part between the two pole posts. At the same time, arranging the two pole posts on the same side wall of the housing is beneficial to the grouping of battery cells and reduces the difficulty of grouping battery cells.

[0016] In some embodiments, at least a part of the support member is disposed between the pressure relief portion and the terminal post.

[0017] In the above technical solution, the support member can play a role in blocking the pressure relief substances generated by the pressure relief portion to reduce the possibility of contact between the pressure relief substances and the terminal post, or reduce the contact between the pressure relief substances and the terminal post, thereby reducing the risk of damage to the terminal post caused by the contact between the pressure relief substances and the terminal post, and further triggering an internal short circuit of the battery device.

[0018] In some embodiments, at least a part of the pressure relief portion is disposed between the two terminal posts.

[0019] In the above technical solution, the pressure relief portion corresponds to the suspended portion between the two terminal posts where the separator is located, and the support member supports the suspended portion, so that the suspended portion of the separator is not easily blocked by the pressure relief portion, which is beneficial to the normal pressure relief process of the pressure relief portion.

[0020] In some embodiments, the support member and the pressure relief portion are arranged at intervals in a direction perpendicular to the first direction.

[0021] In the above technical solution, the support member is not likely to block the pressure relief portion, so that the pressure relief portion can achieve a better pressure relief effect.

[0022] In some embodiments, the support member has a through hole for avoiding the pressure relief portion, and the through hole penetrates the support member along the first direction and faces the pressure relief portion.

[0023] In the above technical solution, the support member is not likely to block the pressure relief portion, so that the pressure relief portion can achieve a better pressure relief effect.

[0024] In some embodiments, the support member includes a support ring, and the support ring is arranged around the pressure relief portion to define the through hole.

[0025] In the above technical solution, when a thermal runaway occurs in one of the multiple battery cells and pressure relief substances are emitted, the support rings on the remaining battery cells can play a certain blocking role, which can reduce the possibility of damage to the pressure relief portion caused by the contact between the pressure relief substances and the pressure relief portions of the remaining battery cells, thereby reducing the risk of chain thermal runaway and improving the use reliability of the battery device.

[0026] In some embodiments, the support member has a communication channel, one end of the communication channel is communicated with the through hole, and an opening is provided on one side of the support member in a direction perpendicular to the first direction, and the other end of the communication channel is communicated with the opening.

[0027] In the above technical solution, by providing a communication channel in the support member, it is beneficial to guide the pressure relief material generated by the pressure relief portion to be discharged from a preset path, so as to reduce the risk of the pressure relief material contacting other components inside the battery device and damaging other components inside the battery device.

[0028] In some embodiments, the support member includes a plurality of support blocks arranged at intervals, and the plurality of support blocks are used to support between the side wall and the separator, and the pressure relief portion is provided between two of the support blocks.

[0029] In the above technical solution, by providing a plurality of support blocks arranged at intervals, multi-point support for the separator can be achieved, which is beneficial to improving the support effect while reducing the weight of the support member.

[0030] In some embodiments, the battery device further includes an insulating member, the insulating member covers the side wall, the insulating member has an avoidance hole, and the pole column passes through the avoidance hole; wherein, the support member supports between the insulating member and the separator; or / and, the support member supports between the housing and the insulating member.

[0031] In the above technical solution, the insulating member is provided to increase the creepage distance between the housing and an external conductor, for example, the creepage distance between a busbar component and the housing.

[0032] In some embodiments, the insulating member and the support member are integrally formed; or, the insulating member and the support member are separately provided and connected.

[0033] In the above technical solution, for the integrally formed insulating member and support member, the installation steps between the support member and the insulating member can be saved, which is beneficial to reducing the assembly process of the battery device and lowering the production cost of the battery device; for the separately provided and connected insulating member and support member, in this way, the structure of the insulating member is relatively simple and convenient for processing.

[0034] In some embodiments, the support member includes an insulating material member, and the melting point of the insulating material member is less than 300 °C.

[0035] In the above technical solution, the support member can be a plastic part, so that the pressure relief material entering the through hole can form a pressure relief channel by melting the circumferential side wall of the support ring, enabling the pressure relief material to be discharged. In addition, it can be understood that the support member not arranged around the pressure relief portion can also be a plastic part to have good insulation performance and a light mass.

[0036] In some embodiments, the support member includes a porous material member.

[0037] In the above technical solution, the support member has a relatively light mass, which is beneficial to reducing the mass of the battery device. At the same time, the support member can also absorb the electrolyte ejected from the pressure relief part during thermal runaway, reduce the pollution of the electrolyte to other components, and improve the insulation ability of the battery device.

[0038] In some embodiments, the support member is a deformable member.

[0039] In the above technical solution, it is possible to reduce the possibility that the manufacturing error of the support member affects the assembly of the separator on the battery cell, and improve the assembly reliability of the battery device.

[0040] In some embodiments, the separator has an opening area, the battery cell has a pressure relief part, and the opening area is communicated with the pressure relief part.

[0041] In the above technical solution, by providing an opening area on the separator and communicating the opening area with the pressure relief part, the pressure relief substance discharged from the pressure relief part can be directly discharged from the opening area, which is beneficial to reducing the discharge resistance of the pressure relief substance, increasing the discharge speed of the pressure relief substance, and reducing the possibility that the pressure relief substance diffuses to the surroundings and contacts the surrounding battery cells.

[0042] In a second aspect, an embodiment of the present invention further provides an electrical device, including the above battery device, and the battery device is used to provide electrical energy for the electrical device.

[0043] In the above technical solution, since the use reliability of the battery device is improved, it is beneficial to improve the working reliability of the electrical device.

[0044] In a third aspect, an embodiment of the present invention further provides an energy storage device, including a plurality of the above battery devices.

[0045] In the above technical solution, since the use reliability of the battery device is improved, it is beneficial to improve the working reliability of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic structural diagram of a vehicle provided by some embodiments of the present application;

[0047] Figure 2 It is an exploded view of a battery device provided by some embodiments of the present application;

[0048] Figure 3 It is a schematic structural diagram of a battery module provided by some embodiments of the present application;

[0049] Figure 4 It is a schematic structural diagram of a battery cell provided by some other embodiments of the present application;

[0050] Figure 5Schematic diagram of the battery cell provided in some embodiments of the present application;

[0051] Figure 6 Schematic diagram of the connection between the battery cell and the separator provided in some embodiments of the present application;

[0052] Figure 7 Schematic diagram of the energy storage device provided in some embodiments of the present application.

[0053] Reference numerals:

[0054] Vehicle 1000; Energy storage device 2000;

[0055] Battery device 100; Controller 200; Motor 300;

[0056] Box body 10;

[0057] First box body 101; Second box body 102;

[0058] Battery cell 20;

[0059] Shell 201; Terminal 202; Pressure relief part 203; Side wall 204;

[0060] Separator 301; Busbar component 302; Nickel sheet 303; Acquisition component 304;

[0061] Support 40;

[0062] Through hole 401; Support ring 402; Communication channel 403; Opening 404;

[0063] Support block 405;

[0064] Insulator 50;

[0065] Avoidance hole 501; First part 502; Second part 503; Third part 504;

[0066] First direction F1. Detailed implementation manners

[0067] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0068] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as commonly understood by those skilled in the technical field to which this utility model belongs. The terms used in the description of this utility model in the specification are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The terms "including" and "having" and any variations thereof in the specification, claims and drawings of this utility model are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims or drawings of this utility model are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0069] Reference to "embodiment" in this utility model means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of this utility model. The phrase may not necessarily refer to the same embodiment when it appears in various positions in the specification, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0070] In the description of this utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", "attached" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0071] The term "and / or" in this utility model only describes the associated relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this utility model generally represents an "or" relationship between the associated objects before and after.

[0072] In the embodiments of this utility model, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width and other dimensions of various components shown in the drawings of the embodiments of this utility model, as well as the overall thickness, length, width and other dimensions of the integrated device are only for illustrative purposes and should not constitute any limitation to this utility model.

[0073] The "plurality" mentioned in this utility model refers to two or more (including two).

[0074] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0075] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0076] As an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0077] In some embodiments, the battery apparatus may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0078] As an example, the battery cell assembly may be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0079] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0080] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are snapped together so that a closed space is formed inside the box body to accommodate the battery cell assembly. Here, "closed" means covered or closed, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0081] As an example, the box body may 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 a closed space is formed inside the box body to accommodate the battery cell assembly.

[0082] In some embodiments, the box body can be part of the chassis structure of a vehicle. For example, a part of the box body can become at least a part of the floor of the vehicle, or a part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0083] Embodiments of the present application provide an energy storage device, which includes one or more battery clusters (Battery Cluster) to increase the voltage and capacity of the energy storage device. The battery cluster may include a plurality of battery devices, and the plurality of battery devices 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.

[0084] In the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, or a solid-state battery, etc., and the embodiments of the present application do not limit this. The battery cell may be in a cylindrical shape, a cuboid shape, or other shapes, etc., and the embodiments of the present application do not limit this either.

[0085] The battery cell includes a housing, an electrode component, and an electrolyte (which may be a solid electrolyte layer located between the positive and negative electrode plates in a solid-state battery). The electrode component includes at least one electrode assembly. The electrode assembly and the electrolyte are both received in the housing. The electrode assembly includes a positive electrode plate, a negative electrode plate, and a separator (this structure can be omitted in a solid-state battery). The battery cell mainly operates by the movement of metal ions between the positive electrode plate and the negative electrode plate.

[0086] The positive electrode plate includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector without the coated positive electrode active material layer protrudes from the positive electrode current collector with the coated positive electrode active material layer. The positive electrode current collector without the coated positive electrode active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc.

[0087] The negative electrode plate includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector without the coated negative electrode active material layer protrudes from the negative electrode current collector with the coated negative electrode active material layer. The negative electrode current collector without the coated negative electrode active material layer serves as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP, polypropylene, or PE, polyethylene, etc. The electrode assembly mentioned in the embodiments of the present application is a wound or laminated structure.

[0088] The electrode assembly can be a wound structure or a laminated structure. During processing, the positive electrode plate, the negative electrode plate, and the separator are wound or laminated in sequence to obtain the electrode assembly. In the electrode assembly, a plurality of positive electrode tabs are laminated together and form an electrical connection with the positive electrode terminal assembly, and a plurality of negative electrode tabs are laminated together and form an electrical connection with the negative electrode terminal assembly.

[0089] In the related art, a battery device includes a busbar component and a separator. The busbar component is used to connect the poles of multiple battery cells to achieve series connection, parallel connection, or hybrid connection among the multiple battery cells. Hybrid connection means that there are both series and parallel connections among the multiple battery cells. The separator is supported on the poles of the battery cells. The separator is used to connect, support, and fix the busbar component, and is used to isolate the busbar component and the housing of the battery cell. A collection component such as a flexible printed circuit board is provided on the separator. The collection component is used to collect data such as the voltage of the busbar component and the temperature of the battery cell. The busbar component and the collection component are connected by an electrical connector (for example Figure 3 the nickel sheet 303 in

[0090] The part of the separator that is not supported on the pole is usually spaced apart from the side wall of the housing of the battery cell. That is to say, part of the separator is suspended. At the same time, in order to reduce the weight of the separator, the thickness of the separator is usually not too thick. Therefore, the structural strength is low. During long-term use, the suspended part of the separator away from the pole may collapse. On the one hand, the collapsed part of the separator will reduce the area of the pressure relief channel outside the pressure relief part, reduce the discharge speed of the pressure relief substance, and in some cases, may also block the pressure relief part, causing the pressure relief part to fail. Secondly, a flexible printed circuit board is fixed on the separator, and a nickel sheet is connected to the flexible printed circuit board. If the separator collapses, the flexible printed circuit board will also collapse, and the nickel sheet connected to the flexible printed circuit board may be separated from the flexible printed circuit board, resulting in poor contact problems and reducing the reliability of the battery device.

[0091] In view of this, an embodiment of the present application provides a battery device. The battery device includes multiple battery cells, a busbar component, a separator, and a support member. The battery cell includes a housing, a pole, and a pressure relief part. A pressure relief part and a pole are provided on one side wall of the housing in the first direction; the busbar component is used to connect the poles of multiple battery cells; the separator is provided on one side of the housing in the first direction. The separator is supported on multiple battery cells. The separator is used to install the busbar component and isolate the busbar component and the side wall; the support member is provided between the separator and the side wall. In the first direction, at least part of the projection of the support member and the projection of the pressure relief part are staggered.

[0092] In the battery device with the above structure, the part of the separator far from the pole column 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. Thus, the support member can support the suspended part of the separator. On the one hand, it can reduce the problem that the suspended part of the separator is prone to collapse or reduce the degree of collapse of the suspended part of the separator, and further reduce the problem of poor contact of the electrical connection member fixed on the collection component of the suspended part of the separator. On the other hand, due to the support of the support member, the pressure relief part is not easily blocked by the collapsed separator. At the same time, the arrangement position of the support member is at least partially staggered from the pressure relief part, and the support member has little influence on the pressure relief process of the pressure relief part, which is beneficial to reducing the possibility of pressure relief failure of the battery cell. Thus, the battery device of the present application has better use reliability.

[0093] The technical solutions described in the embodiments of the present application are applicable to battery devices, electrical devices using battery devices, and energy storage devices.

[0094] The electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator, and an electric planer, etc. The embodiments of the present application do not make special restrictions on the above electrical devices.

[0095] 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 electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low electricity consumption periods and provide electrical energy to relevant users or electrical equipment during high electricity consumption periods. The energy storage system provided by the embodiments of the present application can be any power system that requires an energy storage device.

[0096] For the convenience of description in the following embodiments, the electrical device is taken as an example of a vehicle for illustration.

[0097] Please refer to Figure 1 , Figure 1Schematic structural diagram of vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 is provided with a battery device 100, and the battery device 100 can be arranged at the bottom, head, tail, etc. 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 the operating power source of the vehicle 1000.

[0098] The vehicle 1000 may 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, it is used for the working power requirements during the start-up, navigation, and driving of the vehicle 1000.

[0099] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0100] Please refer to Figure 7 , Figure 7 Schematic structural diagram of the 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 may include a cabinet body and one or more battery clusters. The battery clusters are accommodated in the cabinet body, and the battery clusters may include a plurality of battery devices 100.

[0101] Please refer to Figure 2 , Figure 2 Explosion diagram of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes battery cells 20 and a box body 10 for accommodating the battery cells 20. The box body 10 can be in various structural forms.

[0102] In some embodiments, the box body 10 may include a first box body 101 and a second box body 102. The first box body 101 and the second box body 102 are covered with each other, and the first box body 101 and the second box body 102 jointly define an accommodation space for accommodating the battery cells 20. A sealing member may also be provided at the connection position between the first box body 101 and the second box body 102 to achieve the sealed connection between the first box body 101 and the second box body 102. For example, referring to Figure 2 ,both the first box body 101 and the second box body 102 can be hollow structures with one side open. The open side of the first box body 101 covers the open side of the second box body 102, then a box body 10 with an accommodation space is formed. Another example is that the second box body 102 can be a hollow structure with one side open, and the first box body 101 is in the form of a cover and can cover the open side of the second box body 102. The box body 10 can be in various shapes, such as a cylindrical box body, a cuboid box body, etc.

[0103] Please refer to Figures 3 to 5 , Figure 3 which is a schematic structural diagram of a battery module provided for some embodiments of the present application; Figure 4 which is a schematic structural diagram of a battery cell 20 provided for some other embodiments of the present application; Figure 5 which is a schematic structural diagram of a battery cell 20 provided for still some other embodiments of the present application.

[0104] Combined with Figures 3 to 5 as shown, the battery device 100 includes a plurality of battery cells 20, a busbar component 302, a separator 301, and a support member 40. The battery cell 20 includes a housing 201, a terminal 202, and a pressure relief portion 203. A pressure relief portion 203 and a terminal 202 are provided on a side wall 204 of the housing 201 on one side in the first direction F1; the busbar component 302 is used to connect the terminals 202 of the plurality of battery cells 20; the separator 301 is provided on one side of the housing 201 in the first direction F1, and the separator 301 supports the plurality of battery cells 20. The separator 301 is used to mount the busbar component 302 and isolate the busbar component 302 from the side wall 204; the support member 40 is provided between the separator 301 and the side wall 204. In the first direction F1, at least a part of the projection of the support member 40 and the projection of the pressure relief portion 203 are staggered.

[0105] Exemplarily, the separator 301 can be used to connect, support, and fix the busbar component 302 and fix the acquisition component 304. The acquisition component 304 is connected to the busbar component 302 through an electrical connection member (such as a nickel sheet 303) and is used to acquire the voltage of the busbar component 302 and the temperature data of the battery cell 20.

[0106] The battery cell 20 can be provided with a pressure relief portion 203. When the internal pressure of the battery cell 20 is too high (such as thermal runaway), the pressure relief portion 203 is used to release the internal substances (such as gas, liquid, particulate matter, etc.) of the battery cell 20 to reduce the internal pressure of the battery cell 20 and avoid the internal pressure of the battery cell 20 increasing too fast, resulting in dangerous accidents such as the explosion and combustion of the battery cell 20. For example, the pressure relief portion 203 can be an explosion-proof valve, an explosion-proof sheet, etc.

[0107] The housing 201 can include a housing body and a housing cover. The pressure relief portion 203 and the terminal 202 can be provided on the housing cover; alternatively, the pressure relief portion 203 and the terminal 202 can also be provided on any wall body of the housing body. Exemplarily, only one terminal 202 can be provided on the side wall 204 of the housing 201 along the first direction F1; or, two terminals 202 can be provided on the side wall 204 of the housing 201 along the first direction F1.

[0108] The isolation plate 301 is supported on a plurality of battery cells 20, wherein the isolation plate 301 can be supported on the pole 202 through the busbar 302, that is, the busbar 302 is fixedly connected to the pole 202 (for example, the isolation plate 301 is injection-molded to connect the busbar 302, or the busbar 302 is snap-fitted to the isolation plate 301); or the isolation plate 301 itself can also be directly supported on the pole 202. The isolation plate 301 isolates the busbar 302 from the side wall 204 to reduce the possibility of electrical conduction between the busbar 302 and the housing 201.

[0109] The portion of the isolating plate 301 that is far from the pole 202 is spaced apart from the side wall 204 of the shell 201. For example, in order to facilitate processing, the isolating plate 301 is usually a plate, and the pole 202 is also usually protruding from the outer surface of the side wall 204. The outer surface of the side wall 204 is the outer wall of the side wall 204. The shell 201 has a receiving cavity for accommodating the electrode assembly, and the side of the side wall 204 facing away from the receiving cavity is the outer side. As a result, the portion of the isolating plate 301 that is far from the pole 202 is spaced apart from the side wall 204 to form a suspended portion. Alternatively, in other embodiments, the pole 202 may not protrude from the outer surface of the side wall 204, and the portion of the isolating plate 301 that is used to support the pole 202 is formed as a protruding portion protruding toward the pole 202, so that the portion of the isolating plate 301 that is far from the pole 202 is spaced apart from the shell 201.

[0110] By making the projection of the support member 40 at least partially offset from the projection of the pressure relief portion 203, that is, the support member 40 is at least partially not located on the discharge path of the pressure relief portion 203, the possibility of the support member 40 obstructing the pressure relief portion 203 from discharging pressure relief materials can be reduced, so that the pressure relief portion 203 can realize the pressure relief function of relieving pressure inside the battery cell 20.

[0111] In the above technical solution, the portion of the isolation plate 301 that is far from the pole 202 is separated from the side wall 204 to form a suspended portion, and the support member 40 is arranged between the suspended portion and the side wall 204, so that the support member 40 can support the suspended portion of the isolation plate 301. On the one hand, it can reduce the problem of the suspended portion of the isolation plate 301 being prone to collapse or reduce the degree of collapse of the suspended portion of the isolation plate 301, thereby reducing the problem of poor contact of the electrical connector fixed on the collection component of the suspended portion of the isolation plate 301; on the other hand, due to the supporting effect of the support member 40, the pressure relief portion 203 is not easy to be blocked by the collapsed isolation plate 301, and at the same time, the arrangement position of the support member 40 is at least partially staggered from the pressure relief portion 203, and the support member 40 has little effect on the pressure relief process of the pressure relief portion 203, which is conducive to reducing the possibility of pressure relief failure of the battery cell 20. As described above, the battery device 100 of the embodiment of the present application has better reliability in use.

[0112] According to some embodiments of the present utility model, reference may be made to Figure 3 As shown, a plurality of battery cells 20 are provided, and a plurality of support members 40 are provided. The plurality of support members 40 and the plurality of battery cells 20 are arranged in one-to-one correspondence.

[0113] The plurality of battery cells 20 can be directly connected in series, in parallel, or in a hybrid connection with each other, and then the whole formed by the plurality of battery cells 20 is accommodated in the box body 101. Of course, it is also possible that the plurality of battery cells 20 are first connected in series, in parallel, or in a hybrid connection to form battery modules, and then the plurality of battery modules are connected in series, in parallel, or in a hybrid connection to form a whole and are accommodated in the box body 101.

[0114] The plurality of support members 40 and the plurality of battery cells 20 are arranged in one-to-one correspondence. That is to say, during assembly, a support member 40 is arranged on one battery cell 20, and then the plurality of battery cells 20 are stacked together and connected to the separator plate 301 to form the battery device 100.

[0115] In the above technical solution, the support members 40 and the battery cells 20 are arranged in one-to-one correspondence. Therefore, when installing the support members 40, the installation position of the support members 40 can be positioned with one battery cell 20 as a reference. The setting position of the support members 40 relative to the battery cells 20 has good consistency, and the support members 40 are not likely to shift relative to the battery cells 20, so that the pressure relief part 203 and the support members 40 can be well staggered, reducing the influence of the support members 40 on the normal pressure relief process of the pressure relief part 203 and reducing the possibility that the pressure relief part 203 is blocked by the support members 40. In addition, since the support members 40 and the battery cells 20 are arranged in one-to-one correspondence, the support members 40 do not need to be designed with appropriate lengths according to the size of the separator plate 301 or the number of battery cells 20, and the versatility of the support members 40 is better, which is beneficial to improving production efficiency.

[0116] According to some embodiments of the present utility model, one support member 40 is arranged corresponding to a plurality of battery cells 20.

[0117] For example, the support member 40 can be strip-shaped, the plurality of battery cells 20 are stacked along a set direction, the support member 40 extends along the set direction, and one support member 40 is arranged between the whole formed by the plurality of battery cells 20 and the separator plate 301, but not limited thereto, and the support member 40 can also be of an irregular shape.

[0118] In the above technical solution, one support member 40 supports between the whole formed by the plurality of battery cells 20 and the separator plate 301. In this way, the number of support members 20 is small, the assembly speed is fast, and the assembly steps are fewer.

[0119] According to some embodiments of the present utility model, at least one of the separator plate 301 and the side wall 204 is separately provided and connected to the support member 40.

[0120] That is to say, the support member 40 can be fixedly connected only to the isolation plate 301; alternatively, the support member 40 can also be fixedly connected only to the side wall 204 of the housing 201; or, the support member 40 can be fixedly connected to both the housing 201 and the isolation plate 301. The support member 40 connected to the housing 201 can abut against the isolation plate 301, or, the support member 40 connected to the housing 201 can also have a small gap with the isolation plate 301, and this gap is much smaller than the distance between the suspended portion of the isolation plate 301 and the side wall 204 in the first direction F1. The support member 40 connected to the isolation plate 301 can abut against the housing 201, or, the support member 40 connected to the isolation plate 301 can also have a small gap with the housing 201, and this gap is much smaller than the distance between the suspended portion of the isolation plate 301 and the side wall 204 in the first direction F1.

[0121] In the embodiment where the support member 40 is fixedly connected to both the housing 201 and the isolation plate 301, the suspended portion of the isolation plate 301 can be stably connected to the housing 201 through the support member 40, so as to reduce the degree of vibration of the suspended portion of the isolation plate 301, which is beneficial to reducing the possibility of fatigue damage to the connection points of the electrical connection components on the isolation plate 301.

[0122] In the above technical solution, at least one of the isolation plate 301 and the side wall 204 is connected to the support member 40. In this way, the structures of the isolation plate 301 and the housing 201 are relatively simple and convenient for molding and processing.

[0123] According to some embodiments of the present invention, the side wall 204 or the isolation plate 301 and the support member 40 are integrally formed.

[0124] That is to say, at least part of the support member 40 and the housing 201 are integral parts; or, the support member 40 and the isolation plate 301 are integral parts.

[0125] In the above technical solution, for the side wall 204 or the isolation plate 301 and the support member 40 to be integrally formed, in this way, the number of components of the battery device 100 is less, which is beneficial to improving the assembly efficiency of the battery device 100.

[0126] According to some embodiments of the present invention, reference can be made to Figure 6 , there is a gap between the isolation plate 301 and the support member 40.

[0127] It should be noted that the gap between the isolation plate 301 and the support member 40 is much smaller than the distance between the isolation plate 301 and the side wall 204, so that the support member 40 can form a supporting effect on the suspended portion of the isolation plate 301 and reduce the possibility of large deformation of the suspended portion of the isolation plate 301.

[0128] In the above technical solution, the support member 40 can reduce the possibility of a large collapse of the suspended portion of the partition plate 301. At the same time, the gap between the support member 40 and the partition plate 301 can form an exhaust passage, so that the pressure relief material discharged by the pressure relief portion 203 can be discharged through the gap between the support member 40 and the partition plate 301.

[0129] According to some embodiments of the present invention, reference may be made to Figure 6 , in the first direction F1, the distance between the partition plate 301 and the side wall 204 is D1, the size of the support member 40 is D2, and |D1 - D2| ≤ 0.5 mm.

[0130] Since the pole column 202 protrudes from the outer surface of the side wall 204, one end of the pole column 202 outside the housing 201 is used to connect to the bus bar member 302 or the partition plate 301, and the partition plate 301 is usually a flat plate member. Therefore, the part of the partition plate 301 away from the pole column 202 will be in a suspended state and is prone to collapse problems. By providing the support member 40 between the housing 201 and the partition plate 301, the support member 40 can support the suspended portion of the partition plate 301, making it difficult for the suspended portion of the partition plate 301 to collapse.

[0131] In the first direction F1, the distance between the partition plate 301 and the side wall 204 is D1, the size of the support member 40 is D2, and |D1 - D2| ≤ 0.5 mm. For example, the absolute value of the difference between D2 and D1 can be 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm, 0.1 mm or any value between any two of them.

[0132] |D1 - D2| ≤ 0.5 mm, that is to say, in the first direction F1, the size D2 of the support member 40 can be slightly larger than the distance D1 between the partition plate 301 and the side wall 204, or the size D2 of the support member 40 can also be slightly smaller than the distance D1 between the partition plate 301 and the side wall 204, or the size D2 of the support member 40 can also be equal to the distance D1 between the partition plate 301 and the side wall 204.

[0133] The absolute value of the difference between the size D2 of the support member 40 and the distance D1 between the partition plate 301 and the side wall 204 is within this range. On the one hand, during the production and processing of the support member 40, a lower processing accuracy can be maintained, which is beneficial to reducing the production cost of the support member 40; on the other hand, the size difference between multiple support members 40 will not be too large, which can reduce the possibility of obvious unevenness of the partition plate 301 and is beneficial to obtaining a better support effect for the partition plate 301.

[0134] According to some embodiments of the present invention, reference may be made to Figures 3 to 5, there are two terminal posts 202, and the two terminal posts 202 are arranged on the same side wall 204 of the housing 201, and at least part of the support member 40 is arranged between the two terminal posts 202.

[0135] At least part of the support member 40 is arranged between the two terminal posts 202, so that the support member 40 can support the suspended part between the two terminal posts 202. The support member 40 can be completely arranged between the two terminal posts 202, or only part of it can be arranged between the two terminal posts 202.

[0136] Arranging the two terminal posts 202 on the same side wall 204 of the housing 201 is beneficial to the grouping of the battery cells 20 and reduces the difficulty of grouping the battery cells 20; at the same time, it is also beneficial to reduce the size or quantity of the support member 40, thereby facilitating the reduction of the weight of the battery device 100.

[0137] According to some embodiments of the present invention, reference can be made to Figures 3 to 5 , at least part of the pressure relief part 203 is arranged between the two terminal posts 202.

[0138] At least part of the pressure relief part 203 is arranged between the two terminal posts 202, that is to say, the pressure relief part 203 is arranged near the middle of the side wall 204, so that when the battery cell 20 undergoes thermal runaway, the pressure relief substance can reach the pressure relief part 203 more quickly and be discharged from the pressure relief part 203. The pressure relief part 203 corresponds to the suspended part of the separator 301 between the two terminal posts 202, and the support member 40 supports the suspended part, so that the suspended part of the separator 301 is not easily blocked by the pressure relief part 203, which is beneficial to the normal pressure relief process of the pressure relief part 203.

[0139] According to some embodiments of the present invention, at least part of the support member 40 is arranged between the pressure relief part 203 and the terminal post 202.

[0140] For example, reference can be made to Figure 4 , the support member 40 is arranged around the pressure relief part 203 so that part of the support member 40 is arranged between the pressure relief part 203 and the terminal post 202. Or, reference can be made 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 part 203 and the terminal post 202.

[0141] In this way, the support member 40 can play a role in blocking the pressure relief substance generated by the pressure relief part 203, reducing the possibility of contact between the pressure relief substance and the terminal post 202, or reducing the contact between the pressure relief substance and the terminal post 202, thereby reducing the risk of damage to the terminal post 202 caused by the contact between the pressure relief substance and the terminal post 202 and further triggering an internal short circuit of the battery device 100.

[0142] According to some embodiments of the present invention, reference can be made to Figure 5As shown, the support member 40 and the pressure relief portion 203 are arranged at intervals in a direction perpendicular to the first direction F1.

[0143] In other words, in a direction perpendicular to the first direction F1, the distance between the support member 40 and the pressure relief portion 203 is greater than 0.

[0144] In this way, the support member 40 is not likely to block the pressure relief portion 203, so that the pressure relief portion 203 can achieve a better pressure relief effect. At the same time, when arranging the support member 40, it is only necessary to directly space the support member 40 and the pressure relief portion 203 apart, without the need for relatively precise positioning of the support member 40, which is beneficial to reducing the arrangement difficulty of the support member 40.

[0145] According to some embodiments of the present invention, reference may be made to Figure 3 and Figure 4 The support member 40 has a through hole 401 that avoids the pressure relief portion 203. The through hole 401 penetrates the support member 40 along the first direction F1 and faces the pressure relief portion 203.

[0146] 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 aligned with the pressure relief portion 203, or the through hole 401 can also be partially offset from the pressure relief portion 203 in a direction perpendicular to the first direction F1. In a 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.

[0147] By providing the through hole 401 on the support member 40, the through hole 401 avoids the pressure relief portion 203, so that the support member 40 is not likely to block the pressure relief portion 203 or reduces the degree of blockage of the support member 40 to the pressure relief portion 203, so that the pressure relief portion 203 has better pressure relief ability. The remaining part of the support member 40 without the through hole 401 supports the partition plate 301. In this way, the support area of the support member 40 for the partition plate 301 is large and the support effect is better.

[0148] According to some embodiments of the present invention, reference may be made to Figure 3 The support member 40 may include a support ring 402, and the support ring 402 is arranged around the pressure relief portion 203 to define the through hole 401.

[0149] That is to say, when the pressure relief part 203 discharges the pressure relief substance, the pressure relief substance can enter the through hole 401. Then, the pressure relief substance can form a pressure relief channel by melting the support member 40 so that the pressure relief substance can be discharged; or, the pressure relief substance can be discharged through the communication channel 403 provided on the support ring 402 and communicating with the through hole 401; or, the isolation plate 301 is provided with an opening area that communicates with the through hole 401, so that the pressure relief substance generated by the pressure relief part 203 can be discharged through the through hole 401 and the opening area in sequence.

[0150] The support ring 402 is arranged around the pressure relief part 203. In this way, when a thermal runaway occurs in one of the plurality of battery cells 20 and the pressure relief substance is discharged, the support rings 402 on the remaining battery cells 20 can play a certain blocking role, which can reduce the possibility of damage to the pressure relief part 203 caused by the contact between the pressure relief substance and the pressure relief parts 203 of the remaining battery cells 20, thereby reducing the risk of chain thermal runaway and improving the use reliability of the battery device 100.

[0151] According to some embodiments of the present invention, reference can be made to Figure 4 As shown, the support member 40 has a communication channel 403. One end of the communication channel 403 communicates with the through hole 401, and the support member 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.

[0152] For example, the support member 40 includes a support ring 402. The support ring 402 is arranged around the pressure relief part 203 to define the through hole 401. The communication channel 403 is provided 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.

[0153] By providing the communication channel 403 and the opening 404 on the support member 40, it is beneficial to guide the pressure relief substance generated by the pressure relief part 203 to be discharged from the preset path, so as to reduce the risk of contact between the pressure relief substance and other components inside the battery device 100 and damage to other components inside the battery device 100.

[0154] According to some embodiments of the present invention, reference can be made to Figure 5 As shown, the support member 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.

[0155] For example, reference can be made to Figure 5As shown, two support blocks 405 may be provided, and each support block 405 is disposed between the pressure relief portion 203 and the terminal post 202. Alternatively, three, four, five, etc. support blocks 405 may also be provided. The support block 405 may also not be disposed between the pressure relief portion 203 and the terminal post 202. The pressure relief portion 203 is disposed between the two support blocks 405, so that the support block 405 is not likely to block the pressure relief portion 203, enabling the pressure relief portion 203 to have better pressure relief capacity.

[0156] By providing a plurality of support blocks 405 arranged at intervals, multi-point support for the separator 301 can be achieved, which is beneficial to reducing the weight of the support member 40 while improving the support effect.

[0157] According to some embodiments of the present invention, the battery cell 20 further includes an insulating member 50. The insulating member 50 covers the side wall 204. The insulating member 50 has an avoidance hole 501, and the terminal post 202 passes through the avoidance hole 501. The support member 40 is supported between the insulating member 50 and the separator 301.

[0158] According to some embodiments of the present invention, the battery cell 20 further includes an insulating member 50. The insulating member 50 covers the side wall 204. The insulating member 50 has an avoidance hole 501, and the terminal post 202 passes through the avoidance hole 501. The support member 40 is supported between the housing 201 and the insulating member 50.

[0159] According to some embodiments of the present invention, the battery cell 20 further includes an insulating member 50. The insulating member 50 covers the side wall 204. The insulating member 50 has an avoidance hole 501, and the terminal post 202 passes through the avoidance hole 501. A support member 40 is provided between the insulating member 50 and the separator 301, and a support member 40 is also provided between the housing 201 and the insulating member 50.

[0160] It can be referred to Figure 4 As shown, the battery device 100 further includes an insulating member 50. The insulating member 50 covers the side wall 204. The insulating member 50 is provided to increase the creepage distance between the housing 201 and an external conductor, for example, the creepage distance between the busbar component and the housing 201; in some cases, the insulating member 50 can also enhance the sealing performance of the battery cell 20 and reduce the possibility of moisture or other liquids penetrating into the interior of the battery cell 20.

[0161] The insulating member 50 has an avoidance hole 501, and the terminal post 202 passes through the avoidance hole 501, so that the insulating member 50 can be attached to the side wall 204 to ensure a good connection effect between the insulating member 50 and the housing 201.

[0162] For an embodiment in which the support member 40 is supported between the insulating member 50 and the partition plate 301, the arrangement of the support member 40 does not change the original connection relationship between the insulating member 50 and the housing 201, or rather, does not change the structural form of the insulating member 50. In this way, it is beneficial to reduce the arrangement cost of the support member 40.

[0163] For an embodiment in which the support member 40 is supported between the housing 201 and the insulating member 50, that is to say, the support member 40 is used to support the insulating member 50 so that the insulating member 50 supports the partition plate 301. In this way, the support area for the partition plate 301 is larger.

[0164] For an embodiment in which the support member 40 is provided both between the insulating member 50 and the partition plate 301 and between the housing 201 and the insulating member 50. For example, the support member 40 includes a first support unit and a second support unit. The first support unit is integrally formed with a part of the insulating member 50. The second support unit is provided between the housing 201 and the insulating member 50. The second support unit can support the first support unit so that the first support unit has higher support strength and is not prone to collapse and deformation, thereby achieving a better support effect on the partition plate 301.

[0165] According to some embodiments of the present invention, reference may be made to Figure 4 As shown, the insulating member 50 and the support member 40 are integrally formed. For example, the support member 40 can be a convex block that protrudes from or away from the side wall 204 relative to the insulating member 50 in the first direction F1, and the convex block is integrally formed with the insulating member 50. Or, reference may be made to Figure 4 As shown, the insulating member 50 includes a first part 502, the support member 40 includes a second part 503 and a 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 provided on the side of the first part 502 away from the side wall 204.

[0166] For example, the support member 40 and the insulating member 50 are integrally formed by stamping.

[0167] For the integral molding of the insulating member 50 and the support member 40, the installation steps between the insulating member 50 and the support member 40 can be saved, which is beneficial to reducing the assembly process of the battery device 100 and lowering the production cost of the battery device 100;

[0168] According to some embodiments of the present invention, the insulating member 50 and the support member 40 are separately provided and connected. That is to say, the support member 40 and the insulating member 50 can be two separately formed parts that are connected together later. For the separate setting and connection of the insulating member 50 and the support member 40, in this way, the structure of the insulating member 50 is relatively simple and convenient for processing.

[0169] Further, the free edges of the second part 503 and the third part 504 define an opening 404, and the second part 503 and the third part 504 define a communication channel 403. The communication channel 403 communicates the pressure relief part 203 and the opening 404, so that the pressure relief material discharged by the pressure relief part 203 can be discharged through the communication channel 403 and the opening 404.

[0170] According to some embodiments of the present invention, the support member 40 includes an insulating material member, and the melting point of the insulating material member is less than 300 °C. The support member 40 includes an insulating material member to help increase the creepage distance between the housing 201 and the bus bar component 302.

[0171] Exemplarily, the support member 40 can be a plastic part to have a good insulating effect; at the same time, the plastic part has a low melting point and can be melted by the pressure relief material. For example, the melting point of the plastic part is below 200 degrees Celsius, but it is not limited thereto. According to the temperature of the pressure relief material discharged by different types of battery devices, the melting point of the corresponding plastic part can also be different.

[0172] For example, the support ring 402 can be a plastic part, so that the pressure relief material entering the through hole 401 can melt the circumferential side wall 204 of the support ring 402 to form a pressure relief channel for the pressure relief material to be discharged. In addition, it can be understood that the support member 40 arranged non-surrounding the pressure relief part 203 can also be a plastic part to have good insulating performance and a light weight.

[0173] In some embodiments, the support member 40 includes a porous material member.

[0174] Exemplarily, the support member 40 can be a foam part, a porous plastic part, a porous ceramic part, etc.

[0175] The support member 40 made of a porous material has a light weight, which is beneficial to reducing the weight of the battery device 100. At the same time, the support member 40 made of a porous material can also absorb the electrolyte ejected by the pressure relief part 203 during thermal runaway, reduce the pollution of the electrolyte to other components, and improve the insulation ability of the battery device 100 during thermal runaway.

[0176] In some other embodiments, the support member 40 can also be a hard material part, a hollow part, a bracket part, etc., which are not specifically limited herein.

[0177] In some embodiments, the support member 40 can include a deformable member.

[0178] Exemplarily, for example, the support member 40 can be a foam, an elastic member, a sponge, a rubber, etc.

[0179] That is to say, the support member 40 has a certain deformability and will deform when being squeezed. Due to the existence of machining errors, the sizes of the support members provided on multiple battery cells 20 may be different. By using a deformable member as the support member 40, when the size of the support member 40 is large, the support member 40 can be compressed, thereby reducing the possibility that the assembly of the separator 301 is affected due to the excessive size of the support member 40 in the first direction F1. Therefore, the support member 40 being a deformable member can reduce the possibility that the assembly of the separator 301 on the battery cell 20 is affected by the manufacturing error of the support member 40, and improve the assembly reliability of the battery device 100.

[0180] According to some embodiments of the present utility model, the separator 301 has an opening area, and the battery cell 20 has a pressure relief portion 203, and the opening area is in communication with the pressure relief portion 203.

[0181] For example, the pressure relief portion 203 is directly disposed opposite to the opening area in the first direction F1 so that the opening area is in communication with the pressure relief portion 203. Alternatively, the opening area and the through hole 401 are disposed opposite to each other in the first direction F1 so that the opening area is in communication with the pressure relief portion 203 through the through hole 401.

[0182] By providing an opening area on the separator 301 and the opening area being in communication with the pressure relief portion 203, the pressure relief substance discharged from the pressure relief portion 203 can be directly discharged from the opening area, which is beneficial to reducing the discharge resistance of the pressure relief substance, increasing the discharge speed of the pressure relief substance, and reducing the possibility that the pressure relief substance diffuses to the surroundings and contacts the surrounding battery cells 20.

[0183] According to the embodiments of the second aspect of the present application, the present application embodiments further provide an electrical device, and the electrical device includes the battery device 100 of any of the above solutions, and the battery device 100 is used to provide electrical energy for the electrical device.

[0184] According to the second embodiment of the utility model, the electric device comprises the battery device 100 according to the first embodiment of the utility model, and the battery device 100 is used to provide electric energy for the electric device. Thus, by adopting the battery device 100, the portion of the isolation plate 301 far from the pole 202 is separated from the side wall 204 to form a suspended portion, and the support member 40 is arranged between the suspended portion and the side wall 204, so that the support member 40 can support the suspended portion of the isolation plate 301, on the one hand, it can reduce the problem of the suspended portion of the isolation plate 301 being prone to collapse or reduce the degree of collapse of the suspended portion of the isolation plate 301, thereby reducing the problem of poor contact of the electrical connector fixed to the suspended portion of the isolation plate 301; on the other hand, due to the supporting effect of the support member 40, the pressure relief portion 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 portion 203, which is conducive to reducing the possibility of pressure relief failure of the battery cell 20. As described above, the battery device 100 according to the embodiment of the present application has better reliability in use.

[0185] According to the third aspect of the present application, the present application also provides an energy storage device 2000, which includes the battery device 100 of any of the above schemes. Thus, by adopting the above battery device 100, the portion of the isolation plate 301 that is far from the pole 202 is separated from the side wall 204 to form a suspended portion, and the support member 40 is arranged between the suspended portion and the side wall 204, so that the support member 40 can support the suspended portion of the isolation plate 301. On the one hand, the problem of the suspended portion of the isolation plate 301 being prone to collapse or the degree of collapse of the suspended portion of the isolation plate 301 can be reduced, thereby reducing the problem of poor contact of the electrical connector fixed to the suspended portion of the isolation plate 301; on the other hand, due to the supporting effect of the support member 40, the pressure relief portion 203 is not easily 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 portion 203, which is conducive to reducing the possibility of pressure relief failure of the battery cell 20. As described above, the energy storage device 2000 according to the embodiment of the present application has better reliability in use.

[0186] The battery device 100 and the vehicle 1000 having the same according to three specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0187] Embodiment 1

[0188] like Figures 1 to 3As shown, the vehicle 1000 includes a battery device 100. The battery device 100 includes battery cells 20, a busbar component 302, a separator 301, and a support 40. The battery cell 20 includes a housing 201, a terminal 202, and a pressure relief portion 203. A pressure relief portion 203 and a terminal 202 are provided on a side wall 204 of the housing 201 on one side in the first direction F1; the busbar component 302 is used to connect the terminals 202 of multiple battery cells 20. The separator 301 is provided on one side of the housing 201 in the first direction F1. The separator 301 supports multiple battery cells 20. The separator 301 is used to mount the busbar component 302 and isolate the busbar component 302 and the side wall 204; the support 40 is provided between the separator 301 and the side wall 204. In the first direction F1, the projection of the support 40 and the projection of the pressure relief portion 203 are staggered.

[0189] There are multiple battery cells 20 provided, and multiple supports 40 are provided. The multiple supports 40 and the multiple battery cells 20 are arranged in one-to-one correspondence.

[0190] The terminal 202 protrudes from the outer surface of the side wall 204. The end of the terminal 202 outside the housing 201 is used to be connected to the busbar component 302. In the first direction F1, the distance between the separator 301 and the side wall 204 is D1, and the size of the support 40 is D2, and |D1 - D2| ≤ 0.5 mm, reducing the possibility of the separator being uneven.

[0191] There are two terminals 202 provided. The two terminals 202 are provided on the same side wall 204 of the housing 201. Part of the support 40 is provided between the two terminals 202, and the pressure relief portion 203 is provided between the two terminals 202. The support 40 includes a support ring 402. The support ring 402 is arranged around the pressure relief portion 203 to define a through hole 401. The through hole 401 and the pressure relief portion 203 are opposite in the first direction F1. The through hole 401 is used to avoid the pressure relief portion 203. The through hole 401 is an avoidance hole penetrating along the first direction F1. The support 40 includes a plastic part.

[0192] Embodiment Two

[0193] It can be referred to Figure 4 As shown, the difference between Embodiment Two and Embodiment One is that: the battery cell 20 further includes an insulating part 50. The insulating part 50 covers the side wall 204. The insulating part 50 has an avoidance hole 501, and the terminal 202 passes through the avoidance hole 501; the support 40 and the insulating part 50 are integrally formed. The support 40 has a communication channel 403. The communication channel 403 is communicated with the through hole 401. The communication channel has an opening 404 on one side perpendicular to the first direction F1.

[0194] Embodiment Three

[0195] It can be referred to Figure 5As shown, the difference between the third embodiment and the first embodiment is that the support member 40 includes two support blocks 405 arranged at intervals. The plurality of support blocks 405 are used to support between the side wall 204 and the partition plate 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 column 202.

[0196] In the structure of the battery device 100, the partition plate 301 is supported on the pole column 202, and the part of the partition plate 301 located between the pole columns 202 is suspended. Due to the insufficient strength of the partition plate 301 itself, the part of the partition plate located between the pole columns 202 will collapse, resulting in the loosening of the functional wiring connected to the partition plate 301 and poor contact.

[0197] In this application, by arranging the support member 40 at the part of the top cover of the housing 201 located between the pole columns 202, the support member 40 supports the partition plate 301, so as to reduce the problem of the partition plate 301 collapsing and causing poor wiring contact. The support member 40 avoids the position of the pressure relief portion 203 to reduce the influence of the support member 40 on the exhaust of the pressure relief portion 203. The support member 40 can be a foam structure. In addition to the support effect, the foam is also lighter in weight. An insulating member 50 is arranged on the top cover, and the insulating member 50 is integrally formed with the support member 40. For example, convex pits can be punched on the plate member to form the integral insulating member 50 and support member 40 to play a supporting role. In this way, the process of pasting the foam can be reduced and the cost can be reduced. At the same time, a support member 40 can be arranged again between the convex pits and the housing 201 to enhance the supporting strength of the support member 40 formed by the insulating member 50.

[0198] It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0199] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery device, characterized in that, include: A plurality of battery cells, each of which comprises a shell, a pole and a pressure relief portion, wherein a side wall of the shell on one side in a first direction is provided with the pressure relief portion and the pole; A busbar component, the busbar component is used to connect the poles of a plurality of the battery cells; An isolation plate, the isolation plate is disposed on one side of the housing in the first direction, the isolation plate is supported by a plurality of the battery cells, and the isolation plate is used to install the current collecting component and isolate the current collecting component from the side wall; A support member is provided between the isolation plate and the side wall, and in the first direction, a projection of the support member and a projection of the pressure relief portion are at least partially offset.

2. The battery device according to claim 1, wherein There are multiple support members, and the multiple support members are arranged in a one-to-one correspondence with the multiple battery cells; or, one support member is arranged in a corresponding correspondence with the multiple battery cells.

3. The battery device according to claim 1, characterized in that, At least one of the isolation plate and the side wall is separately provided with and connected to the support member; or, the side wall or the isolation plate is integrally formed with the support member.

4. The battery device according to claim 1, wherein, A gap is formed between the isolation plate and the support member.

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

6. The battery device according to claim 1, wherein There are two poles, which are arranged on the same side wall of the shell, at least part of the support member is arranged between the two poles, at least part of the pressure relief portion is arranged between the two poles, and at least part of the support member is arranged between the pressure relief portion and the poles.

7. The battery device according to claim 1, wherein The support member and the pressure relief portion are spaced apart from each other in a direction perpendicular to the first direction.

8. The battery device according to claim 1, characterized in that, The support member has a through hole that avoids the pressure relief portion. The through hole penetrates the support member along the first direction and is opposite to the pressure relief portion.

9. The battery device according to claim 8, wherein, The support member includes a support ring, which is arranged around the pressure relief portion to define the through hole.

10. The battery device according to claim 9, characterized in that, The support member has a communication channel, one end of which is communicated 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 communicated with the opening.

11. The battery device according to claim 7, characterized in that, The support member includes a plurality of support blocks arranged at intervals, the plurality of support blocks are used to support between the side wall and the isolation plate, and the pressure relief portion is arranged between two of the support blocks.

12. The battery device according to claim 1, wherein It also includes an insulating member, which is covered on the side wall, and has an avoidance hole, and the pole is passed through the avoidance 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 according to claim 12, wherein, The insulating member and the supporting member are integrally formed; or, the insulating member and the supporting member are separately provided and connected.

14. The battery device according to any one of claims 1 to 13, characterized in that, The support member includes an insulating material member, and the melting point of the insulating material member is less than 300°C.

15. The battery device according to any one of claims 1-13, characterized in that, The support member comprises a porous material member.

16. The battery device according to any one of claims 1-13, characterized in that, The supporting member is a deformable member.

17. The battery device according to claim 1, characterized in that, The separator has an open area, the battery cell has a pressure relief portion, and the open area is in communication with the pressure relief portion.

18. An electrical device, wherein, It comprises a battery device as described in any one of claims 1 to 17, wherein the battery device is used to provide electrical energy to the electrical device.

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

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