Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, the battery device comprises a plurality of battery monomers, a confluence component, a first end plate and an isolation plate, the plurality of battery monomers are arranged along a first direction, and one side of each battery monomer along a second direction is provided with an end cover and an electrode terminal arranged on the end cover; the confluence component is electrically connected with the electrode terminal; the first end plate is arranged on the outermost side of the plurality of single batteries along the first direction, the first end plate is provided with a first end surface on one side of the end cover, and the first end surface is lower than the end cover in the second direction; the isolation plate comprises a body part and a first extension part, the body part is arranged on one side of the plurality of single batteries along the second direction, the confluence component is arranged on the body part, and the first extension part is arranged on one side of the first end plate along the second direction and is connected to the body part and the first end plate. Therefore, the creepage distance among the confluence component, the end cover of the battery monomer and the first end plate along the isolation plate is prolonged, and the safety of the battery device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery device and an electrical device using the same. Background Art

[0002] In the related art, a battery device fixes a group of battery cells through end plates, and an isolation plate is arranged above the battery cells to carry busbars. When a certain battery cell undergoes thermal runaway, the released electrolyte and other thermal runaway products are likely to condense and accumulate on the surface of the isolation plate to form a conductive layer, and it is not easy to volatilize, resulting in a shortening of the creepage distance between the busbar on the isolation plate and the end plate, which is likely to cause insulation failure and affect the safety of the battery device. Summary of the Utility Model

[0003] In view of the above problems, the present application provides a battery device and an electrical device using the same, which extends the creepage distance along the isolation plate between the busbar component, the end cover of the battery cell and the first end plate, and improves the safety of the battery device.

[0004] In a first aspect, the present application provides a battery device, including: a plurality of battery cells arranged in a first direction; each of the battery cells has an end cover and an electrode terminal arranged on the end cover on one side in a second direction, and the second direction intersects with the first direction; a busbar component electrically connected to the electrode terminal; a first end plate arranged on the outermost side of the plurality of battery cells in the first direction and insulated from the battery cells, the first end plate has a first end face on the side where the end cover is located, and the first end face is lower than the end cover in the second direction; an isolation plate including a main body portion and a first extension portion, the main body portion is arranged on one side of the plurality of battery cells in the second direction, and the busbar component is arranged on the main body portion, the first extension portion is arranged on one side of the first end plate in the second direction and is connected to the main body portion and the first end plate.

[0005] In the battery device provided by the present application, the first end face is lower than the end cover of the battery cell in the second direction. The isolation plate carries the busbar component through the main body portion and is connected to the first end plate through the first extension portion to play a role in supporting the isolation plate, so that the first end face can be spaced from the end cover of the battery cell in the second direction, thereby extending the creepage distance along the isolation plate between the busbar component, the end cover of the battery cell and the first end plate, and further reducing the possibility of insulation failure between the busbar component, the end cover of the battery cell and the first end plate, and improving the safety of the battery device.

[0006] Optionally, the distance between the first end face and the end cover in the second direction is H1, and the dimension of the battery cell in the second direction is H2, where 1 / 10 ≤ H1 / H2 ≤ 1 / 5. In this way, there is sufficient creepage distance from the busbar component and the end cover of the battery cell to the first end plate, further reducing the possibility of insulation failure between the busbar component, the end cover of the battery cell and the first end plate, and the first end face has sufficient supporting area for the battery cell, and can firmly fix a plurality of battery cells together.

[0007] Optionally, the first extension portion includes a first sub-extension portion and a second sub-extension portion. The first sub-extension portion extends along the first direction, the second sub-extension portion extends along the second direction, the first sub-extension portion is connected between the second sub-extension portion and the body portion, and one end of the second sub-extension portion away from the first sub-extension portion is connected to the first end plate, and the second sub-extension portion is spaced from the battery cell. In this way, the condensation and enrichment of the thermal runaway products of the battery cell between the second sub-extension portion and the battery cell are reduced, and further the possibility of insulation failure between the busbar component and the first end plate is reduced.

[0008] Optionally, at least a part of the first sub-extension portion protrudes in a direction away from the battery cell and / or is recessed in a direction towards the battery cell. In this way, the creepage distance along the separator between the busbar component, the end cover of the battery cell and the first end plate is extended.

[0009] Optionally, at least a part of the cross-section of the first sub-extension portion perpendicular to the third direction is serrated or wavy, where the first direction, the second direction and the third direction are perpendicular to each other in pairs. In this way, the creepage distance along the separator between the busbar component, the end cover of the battery cell and the first end plate is further extended.

[0010] Optionally, one of the first extension portion and the first end plate is provided with a limiting post, and the other is provided with a limiting hole, and the limiting post is inserted into the limiting hole. In this way, the separator can be fixed on the first end plate by plugging, improving the assembly convenience of the separator.

[0011] Optionally, the battery device further includes an output terminal disposed on the body portion. One end of the output terminal is electrically connected to the electrode terminal, and the other end extends to one side of the first end plate along the second direction and is spaced apart from the first end plate. One end of the output terminal extends to one side of the first end plate along the second direction, increasing the current-carrying area of the output terminal and facilitating the connection of the output terminal. The output terminal is disposed on the body portion and is spaced apart from the first end plate. Since the body portion is connected to the first end plate through the first extension portion, the creepage distance of the output terminal from the separator plate to the first end plate is also increased, reducing the possibility of insulation failure between the output terminal and the first end plate.

[0012] Optionally, the battery device further includes a first insulating cover disposed between the first end plate and the battery cell and surrounding the outer periphery of the battery cell. In this way, the insulation between the battery cell and the first end plate can be ensured, and the insulation performance of the battery device can be improved.

[0013] Optionally, the battery device further includes a second end plate disposed on the other outermost side of the plurality of battery cells relative to the first end plate and insulated from the battery cells. The second end plate has a second end face on the side where the end cover is located, and the second end face is lower than the end cover in the second direction; the separator plate further includes a second extension portion disposed on one side of the second end plate along the second direction and connected to the body portion and the second end plate respectively. The second end face is lower than the end cover of the battery cell, and the body portion of the separator plate is connected to the second end plate through the second extension portion, increasing the creepage distance of the current collecting component and the end cover of the battery cell from the separator plate to the second end plate, reducing the possibility of insulation failure between the current collecting component, the end cover of the battery cell and the second end plate, and improving the safety of the battery device.

[0014] Optionally, the battery device further includes a second insulating cover disposed between the second end plate and the battery cell and surrounding the outer periphery of the battery cell. In this way, the insulation between the battery cell and the second end plate can be ensured, and the insulation performance of the battery device can be improved.

[0015] In a second aspect, the present application provides an electrical device including the battery device according to the first aspect, and the battery device is used to provide electrical energy. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic structural view of a vehicle disclosed in an embodiment of the present application;

[0018] Figure 2 is an exploded structural view of a battery device disclosed in an embodiment of the present application;

[0019] Figure 3 is a schematic structural view of a battery cell disclosed in an embodiment of the present application;

[0020] Figure 4 is a schematic structural view of a battery device disclosed in an embodiment of the present application;

[0021] Figure 5 is a partial schematic structural view of a battery device disclosed in an embodiment of the present application;

[0022] Figure 6 is Figure 4 an enlarged view of the battery device shown in the disclosed embodiment at A;

[0023] Figure 7 is a partial schematic structural view of a separator disclosed in another embodiment of the present application;

[0024] Figure 8 is a partial schematic structural view of a separator disclosed in still another embodiment of the present application;

[0025] Figure 9 is a partial schematic structural view of a separator disclosed in yet another embodiment of the present application;

[0026] Figure 10 is Figure 4 a partial schematic structural view of the battery device shown in the disclosed embodiment.

[0027] In the drawings, the drawings are not drawn to actual scale.

[0028] Marking description:

[0029] 1000, vehicle;

[0030] 100, Battery device; 200, Vehicle body main body; 300, Box body; 310, First part; 320, Second part; 400, Battery cell; 410, End cover; 420, Outer shell; 430, Electrode terminal; 440, Pressure relief mechanism; 510, First end plate; 511, First end face; 600, Separator plate; 610, Body part; 620, First extension part; 621, First sub-extension part; 622, Second sub-extension part; 700, Busbar component; 630, Limit post; 640, Limit hole; 710, Output pole; 810, First insulating cover; 520, Second end plate; 521, Second end face; 650, Second extension part; 820, Second insulating cover; 900, Binding strap;

[0031] X, First direction; Z, Second direction; Y, Third direction. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0034] Referring to "embodiments" in this application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0035] In the description of this application, the term "plurality" means two or more (including two).

[0036] In the description of the present application, the orientation or positional relationship indicated by technical terms such as "thickness", "bottom", "side", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0037] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0038] In the related art, a battery device fixes a group of battery cells through an end plate, and a separator is arranged above the battery cells to carry a bus bar. When a certain battery cell undergoes thermal runaway, the released electrolyte and other thermal runaway products are likely to condense and accumulate on the surface of the separator to form a conductive layer, and it is not easy to volatilize, resulting in a shortened creepage distance between the bus bar on the separator and the end plate, which is likely to cause insulation failure and affect the safety of the battery device.

[0039] Based on the above considerations, an embodiment of the present application provides a battery device, including a plurality of battery cells, a bus bar component, a first end plate, and a separator. The plurality of battery cells are arranged along a first direction. One side of the battery cell along a second direction has an end cap and electrode terminals arranged on the end cap. The second direction intersects with the first direction; the bus bar component is electrically connected to the battery cell; the first end plate is arranged on the outermost side of the plurality of battery cells along the first direction and is insulated from the battery cells. The first end plate has a first end face on the side where the end cap of the battery cell is located, and the first end face is lower than the end cap of the battery cell in the second direction; the separator includes a body part and a first extension part. The body part is arranged on one side of the plurality of battery cells along the second direction, and the bus bar component is arranged on the body part. The first extension part is arranged on one side of the first end plate along the second direction and is connected to the body part and the first end plate.

[0040] In the above battery device, the first end face is lower than the end cap of the battery cell in the second direction. The separator bears the bus bar component through the body part and is connected to the first end plate through the first extension part to play a role in supporting the separator, so that the first end face can be spaced from the end cap of the battery cell in the second direction, thereby extending the creepage distance along the separator between the bus bar component, the end cap of the battery cell, and the first end plate, reducing the possibility of insulation failure between the bus bar component, the end cap of the battery cell, and the first end plate, and improving the safety of the battery device.

[0041] The battery device 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.

[0042] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; 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 may be formed by bundling a plurality of battery cells with cable ties.

[0043] In some embodiments, the battery device 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.

[0044] The battery device and the electrical equipment disclosed in the embodiments of the present application can be used in electrical equipment that uses the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. The electrical equipment may be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys may include stationary or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc., and the spacecraft may include airplanes, rockets, space shuttles, and spaceships, etc.

[0045] For the convenience of description in the following embodiments, a vehicle as an electrical equipment in an embodiment of the present application is taken as an example for description.

[0046] Figure 1 The structural schematic diagram of the vehicle provided for some embodiments of the present application is shown in Figure 1 , the vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, an extended-range electric vehicle, etc. The vehicle 1000 includes a battery device 100 and a vehicle body main body 200, and the battery device 100 is arranged on the vehicle body main body 200. The battery device 100 may be arranged at the bottom, head, or tail of the vehicle body main body 200. 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.

[0047] 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.

[0048] Figure 2 The explosion structural schematic diagram of the battery device provided for some embodiments of the present application is shown inFigure 2 , the battery device 100 includes a box body 300 and a plurality of battery cells 400. The box body 300 may include a first part 310 and a second part 320, and the first part 310 and the second part 320 cover each other to accommodate the battery cells 400. The first part 310 may be a hollow structure with an opening on one side, and the second part 320 may be a plate-like structure. The second part 320 covers the opening side of the first part 310. The first part 310 and the second part 320 may also both be hollow structures with an opening on one side, and the opening side of the second part 320 covers the opening side of the first part 310. Of course, the box body formed by the first part 310 and the second part 320 can be of various shapes, such as a cylinder, a cuboid, etc.

[0049] Inside the box body 300, the plurality of battery cells 400 are arranged in an array. The plurality of battery cells 400 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the plurality of battery cells 400. The plurality of battery cells 400 can be directly connected in series, in parallel, or in a mixed connection together, and then the battery cell assembly formed by the plurality of battery cells 400 is accommodated in the box body 300. Of course, the battery device 100 can also be in the form that a plurality of battery cells 400 are first connected in series, in parallel, or in a mixed connection to form battery cell assemblies, and then the plurality of battery cell assemblies are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the box body 300. The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component 700 for realizing the electrical connection among the plurality of battery cells 400.

[0050] Among them, each battery cell 400 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell 400 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0051] Figure 3 For the structural schematic diagram of the battery cell provided in an embodiment of the present application, please refer to Figure 3 , the battery cell 400 refers to the smallest unit that makes up the battery device 100. The battery cell 400 includes an end cap 410, a housing 420, an electrode assembly, and other functional components.

[0052] The housing 420 is a hollow structure with an opening on one side. The end cap 410 refers to a component that covers the opening of the housing 420 to isolate the internal environment of the battery cell 400 from the external environment. Without limitation, the shape of the end cap 410 can be adapted to the shape of the housing 420 to cooperate with the housing 420. Optionally, the end cap 410 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 410 is not easily deformed when being squeezed or collided, enabling the battery cell 400 to have higher structural strength and improved safety performance.

[0053] An electrode terminal 430 is provided on the end cap 410. The electrode terminal 430 can be used to electrically connect to an electrode assembly for outputting or inputting electrical energy of the battery cell 400. In some embodiments, a pressure relief mechanism 440 for relieving the internal pressure when the internal pressure or temperature of the battery cell 400 reaches a threshold value may also be provided on the end cap 410.

[0054] As an example, it is actuated to relieve the internal pressure or temperature when the internal pressure or temperature of the battery cell 400 reaches a predetermined threshold value. When the internal pressure or temperature of the battery cell 400 reaches a predetermined threshold value, the pressure relief mechanism 440 performs an action or a weak structure provided in the pressure relief mechanism 440 is damaged, thereby forming an opening or a channel for relieving the internal pressure or temperature. This threshold design varies according to different design requirements. The threshold value may depend on one or several materials among the positive electrode plate, negative electrode plate, electrolyte, and separator membrane in the battery cell 400.

[0055] As an example, the pressure relief mechanism 440 can be integrally formed with the end cap 410. For example, a notch is formed on the end cap 410 to form a weak structure, and this weak structure serves as the pressure relief mechanism 440.

[0056] The pressure relief mechanism 440 can also be separately provided and connected to the end cap 410. For example, the pressure relief mechanism 440 is welded to the end cap 410 or connected through other components. As an example, a notch is provided on the pressure relief mechanism 440 to form a weak structure.

[0057] As an example, the pressure relief mechanism 440 can take forms such as an explosion-proof valve, a balance valve, a gas valve, a pressure relief valve, or a safety valve.

[0058] The "actuation" mentioned in this application means that the pressure relief mechanism 440 generates an action or is activated to a certain state, so that the internal pressure and temperature of the battery cell 400 can be relieved. The actions generated by the pressure relief mechanism 440 may include but are not limited to: the components in the pressure relief mechanism 440 move to form an exhaust passage, at least a part of the pressure relief mechanism 440 ruptures, breaks, is torn, or opened, and so on. When the pressure relief mechanism 440 is actuated, the high-temperature and high-pressure substances inside the battery cell 400 will be discharged outward from the actuated part as emissions. In this way, the battery cell 400 can be relieved of pressure and temperature under a controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0059] The emissions from the battery cell 400 mentioned in this application include but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the separator membrane, high-temperature and high-pressure gases generated by reactions, flames, and so on. Among them, the electrolyte, dissolved or split positive electrode plates, conductive additives, etc. are all conductive substances.

[0060] The housing 420 is a component for cooperating with the end cap 410 to form the internal environment of the battery cell 400. Among them, the formed internal environment can be used to accommodate the electrode assembly, the insulating film, the electrolyte, and other components. The housing 420 and the end cap 410 can be independent components. An opening can be provided on the housing 420, and the end cap 410 is covered at the opening to form the internal environment of the battery cell 400. Without limitation, the end cap 410 and the housing 420 can also be integrated. Specifically, the end cap 410 and the housing 420 can first form a common connection surface before other components are put into the housing. When it is necessary to encapsulate the inside of the housing 420, the end cap 410 is then covered on the housing 420. The housing 420 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 420 can be determined according to the specific shape and size of the electrode assembly. The material of the housing 420 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this.

[0061] Refer to Figures 3 to 6 In some embodiments, the battery device 100 includes a plurality of battery cells 400, a first end plate 510, a separator 600, and a current collecting member 700. The plurality of battery cells 400 are arranged along the first direction X. One side of the battery cell 400 along the second direction Z has an end cap 410 and an electrode terminal 430 provided on the end cap 410, wherein the second direction Z intersects the first direction X.

[0062] The first end plate 510 is arranged on the outermost side of the plurality of battery cells 400 along the first direction X and is insulated from the battery cells 400. One side of the first end plate 510 along the second direction Z has a first end face 511, and the first end face 511 is spaced apart from the end cap 410 in the second direction Z. The separator 600 includes a main body portion 610 and a first extension portion 620. The main body portion 610 is arranged on one side of the plurality of battery cells 400 along the second direction Z. The first extension portion 620 is arranged on one side of the first end plate 510 along the second direction Z and is connected to the main body portion 610 and the first end plate 510. The current collecting member 700 is arranged on the main body portion 610 and is electrically connected to the electrode terminal 430 of the battery cell 400.

[0063] ​A pressure relief mechanism 440 and two electrode terminals 430 are provided on the end cap 410 of the battery cell 400. The two electrode terminals 430 are arranged at intervals along the third direction Y, and the pressure relief mechanism 440 is located between the two electrode terminals 430. The separator 600 is an insulating member. The main body portion 610 of the separator 600 is a plate-like structure extending along the first direction X, and the first extension portion 620 is connected to one end of the main body portion 610 along the first direction X. The busbar component 700 can be a busbar sheet. There are multiple busbar components 700. A plurality of busbar components 700 are respectively connected to both sides of the main body portion 610 along the third direction Y, and the busbar components 700 on each side are arranged at intervals along the first direction X. Each busbar component 700 is electrically connected to the electrode terminals 430 of two adjacent battery cells 400 respectively to connect the multiple battery cells 400 in series. Among them, the first direction X, the second direction Z, and the third direction Y are perpendicular to each other in pairs.

[0064] The first end plate 510 is a metal member. The first end face 511 of the first end plate 510 is substantially a plane, and the height of the first end face 511 in the second direction Z is lower than that of the end cap 410 of the battery cell 400, that is, the first end face 511 is located on the side of the end cap 410 away from the main body portion 610. The first extension portion 620 is substantially L-shaped. By connecting the first extension portion 620 to the first end plate 510, one end of the separator 600 can be fixed on the first end plate 510.

[0065] In the above battery device 100, the first end face 511 is lower than the end cap 410 of the battery cell 400 in the second direction Z. The separator 600 bears the busbar component 700 through the main body portion 610 and is connected to the first end plate 510 through the first extension portion 620 to support the separator 600, so that the first end face 511 and the end cap 410 of the battery cell 400 are spaced apart in the second direction Z, thereby extending the creepage distance along the separator 600 between the busbar component 700, the end cap 410 of the battery cell 400, and the first end plate 510, and thus reducing the possibility of insulation failure between the busbar component 700, the end cap 410 of the battery cell 400, and the first end plate 510, and improving the safety of the battery device 100.

[0066] In some embodiments, the distance between the first end face 511 and the end cap 410 of the battery cell 400 in the second direction Z is H1, and the size of the battery cell 400 in the second direction Z is H2, where 1 / 10 ≤ H1 / H2 ≤ 1 / 5.

[0067] H1 is the distance between the first end face 511 and the surface of the end cover 410 facing the body portion 610, and H2 is the height of the battery cell 400. Exemplarily, if the height H2 of the battery cell 400 is 150 mm, then 15 mm ≤ H1 ≤ 30 mm, and the value of H can be 15 mm, 17 mm, 18 mm, 20 mm, 25 mm, 30 mm, etc.

[0068] In this way, there is a sufficient creepage distance along the separator 600 between the bus bar component 700, the end cover 410 of the battery cell 400 and the first end plate 510, further reducing the possibility of insulation failure between the bus bar component 700, the end cover 410 of the battery cell 400 and the first end plate 510. At the same time, the first end face 511 has a sufficient supporting area for the battery cell 400, and can firmly fix a plurality of battery cells 400 together.

[0069] Please refer to Figure 4 、 Figure 6 and Figure 7 In some embodiments, the first extension portion 620 includes a first sub-extension portion 621 and a second sub-extension portion 622. The first sub-extension portion 621 extends along the first direction X, and the second sub-extension portion 622 extends along the second direction Z. The first sub-extension portion 621 is connected between the second sub-extension portion 622 and the body portion 610. One end of the second sub-extension portion 622 away from the first sub-extension portion 621 is connected to the first end plate 510, and the second sub-extension portion 622 is spaced apart from the battery cell 400.

[0070] The first sub-extension portion 621 is connected to one end of the body portion 610 along the first direction X, and the first sub-extension portion 621 is substantially flush with the body portion 610. The first extension portion 620 extends beyond the outermost battery cell 400 in the first direction X. The first sub-extension portion 621 can be insulated from or spaced apart from the battery cell 400 in the second direction Z to increase the creepage distance from the bus bar component 700, the end cover 410 of the battery cell 400 to the first end plate 510.

[0071] The second sub-extension portion 622 is substantially perpendicular to the first sub-extension portion 621, and the second sub-extension portion 622 is spaced apart from the battery cell 400 as a whole in the first direction X, reducing the occurrence of condensation and enrichment of the thermal runaway products of the battery cell 400 between the second sub-extension portion 622 and the battery cell 400, increasing the creepage distance from the bus bar component 700, the end cover 410 of the battery cell 400 to the first end plate 510, and further reducing the possibility of insulation failure between the bus bar component 700 and the first end plate 510.

[0072] In some embodiments, at least a portion of the first sub-extension 621 is convexly disposed in a direction away from the battery cell 400. Alternatively, at least a portion of the first sub-extension 621 is concavely disposed in a direction toward the battery cell 400. Alternatively, a portion of the first sub-extension 621 is convexly disposed in a direction away from the battery cell 400, and a portion of the first sub-extension 621 is concavely disposed in a direction toward the battery cell 400.

[0073] The first sub-extension 621 may include a convex structure formed by protruding in a direction away from the battery cell 400. The cross-section of the convex structure perpendicular to the third direction Y may be arc-shaped, triangular, quadrilateral, etc. Figure 7 As shown, the cross-section of the convex structure perpendicular to the third direction Y may be arc-shaped, which can increase the creepage distance from the bus bar component 700 and the end cap 410 of the battery cell 400 along the surface of the first sub-extension 621 to the first end plate 510, and is convenient for processing and manufacturing.

[0074] As shown in Figure 8 The cross-section of the convex structure perpendicular to the third direction Y may be quadrilateral. Wherein, the first sub-extension 621 may include a first wall, a second wall, and a third wall sequentially connected in a direction away from the body portion 610. The first wall and the third wall are inclined in a direction away from the battery cell 400, and the second wall is connected between the first wall and the third wall and is farther from the battery cell 400 than the first wall and the third wall, which can increase the creepage distance from the bus bar component 700 and the end cap 410 of the battery cell 400 along the surface of the first sub-extension 621 to the first end plate 510, and is convenient for processing and manufacturing.

[0075] The first sub-extension 621 may also include a concave structure formed by recessing in a direction toward the battery cell 400. The cross-section of the concave structure perpendicular to the third direction Y may be arc-shaped, triangular, quadrilateral, etc. Alternatively, the first sub-extension 621 includes a convex structure formed by protruding in a direction away from the battery cell 400 and a concave structure formed by recessing in a direction toward the battery cell 400. The cross-section of the first sub-extension 621 perpendicular to the third direction Y may be serrated or wavy, etc.

[0076] In the above embodiments, at least a portion of the first sub-extension 621 is convexly disposed in a direction away from the battery cell 400 and / or concavely disposed in a direction toward the battery cell 400, which can increase the creepage distance from the bus bar component 700 and the end cap 410 of the battery cell 400 along the surface of the first sub-extension 621 to the first end plate 510.

[0077] Please refer to Figure 9, in some embodiments, at least a part of the cross-section of the first sub-extension portion 621 perpendicular to the third direction Y is serrated or wavy. Thus, the area of the first sub-extension portion 621 can be greatly increased, thereby increasing the creepage distance from the surface of the current collecting member 700 and the end cover 410 of the battery cell 400 along the first sub-extension portion 621 to the first end plate 510.

[0078] Please refer to Figure 6 and Figure 10 , in some embodiments, one of the first extension portion 620 and the first end plate 510 is provided with a positioning post 630, and the other is provided with a positioning hole 640, and the positioning post 630 is inserted into the positioning hole 640.

[0079] Exemplarily, a positioning post 630 is provided on a side of the second sub-extension portion 622 away from the first sub-extension portion 621, and the first end plate 510 is provided with a positioning hole 640. By inserting the positioning post 630 into the positioning hole 640, the first extension portion 620 is fixed on the first end plate 510. Alternatively, a positioning hole is provided on a side of the second sub-extension portion 622 away from the first sub-extension portion 621, and the first end plate 510 is provided with a positioning post. By inserting the positioning post into the positioning hole, the first extension portion 620 can also be fixed on the first end plate 510.

[0080] The cross-section of the positioning post 630 perpendicular to the second direction Z can be circular, elliptical, rhombic, etc., and the cross-section shape of the positioning hole 640 perpendicular to the second direction Z can be consistent with that of the positioning post 630. Among them, the positioning post 630 and the positioning hole 640 can be in interference fit or clearance fit, and the distance between the outer peripheral wall of the positioning post 630 and the inner wall of the positioning hole 640 can be in the range of 0.25 mm - 1 mm to facilitate aligning and inserting the positioning post 630 into the positioning hole 640 and ensure the assembly convenience.

[0081] Still please refer to Figure 6 , in some embodiments, the battery device 100 further includes an output electrode 710, the output electrode 710 is disposed on the body portion 610, one end of the output electrode 710 is electrically connected to the electrode terminal 430, and the other end of the output electrode 710 extends to one side of the first end plate 510 along the second direction Z and is spaced from the first end plate 510.

[0082] The output electrode 710 is a conductive sheet-like structure for outputting the current of the battery device 100. One end of the output electrode 710 can be directly welded to the electrode terminal 430, the other end is disposed opposite to the first end face 511 of the first end plate 510, and the distance between the output electrode 710 and the first end face 511 of the first end plate 510 is greater than the distance H1.

[0083] One end of the output terminal 710 extends to one side of the first end plate 510 along the second direction Z, increasing the current-carrying area of the output terminal 710 and facilitating the connection of the output terminal 710. At the same time, the output terminal 710 is disposed on the body portion 610 and is spaced apart from the first end plate 510. Since the body portion 610 is connected to the first end plate 510 through the first extension portion 620, the creepage distance of the output terminal 710 from the isolation plate 600 to the first end plate 510 is also increased, reducing the possibility of insulation failure between the output terminal 710 and the first end plate 510.

[0084] In some embodiments, the battery device 100 may further include a mounting seat (not shown in the figure). The mounting seat is an insulating block structure. The mounting seat is disposed between the output terminal 710 and the first end plate 510 and can be connected to the side of the first end plate 510 facing the output terminal 710 in a plug-in fit or other manner. The output terminal 710 is connected to the mounting seat. The mounting seat serves to connect and fix the output terminal 710, thereby reducing the probability of the mounting seat shaking relative to the first end plate 510 and enabling the output terminal 710 to output current more stably and continuously.

[0085] Please refer to Figure 5 and Figure 6 , in some embodiments, the battery device 100 further includes a first insulating cover 810. The first insulating cover 810 is disposed between the first end plate 510 and the battery cell 400 and surrounds the outer periphery of the battery cell 400.

[0086] The first insulating cover 810 may include a flat plate portion and a surrounding frame portion. The surrounding frame portion is connected to the outer periphery of the flat plate portion. The flat plate portion is stacked between the battery cell 400 and the first end plate 510, and the surrounding frame portion surrounds the outer periphery of the battery cell 400 to cover the outside of the battery cell 400. In this way, the insulation between the battery cell 400 and the first end plate 510 is ensured, and the insulation performance of the battery device 100 is improved.

[0087] In some embodiments, the battery device 100 further includes a second end plate 520. The second end plate 520 is disposed on the other outermost side of the plurality of battery cells 400 along the first direction X relative to the first end plate 510 and is insulated from the battery cells 400. The second end plate 520 has a second end face 521 on the side where the end cover 410 is located, and the second end face 521 is lower than the end cover 410 in the second direction Z. The isolation plate 600 further includes a second extension portion 650. The second extension portion 650 is disposed on one side of the second end plate 520 along the second direction Z and is respectively connected to the body portion 610 and the second end plate 520.

[0088] The second end plate 520 and the first end plate 510 are respectively disposed at two ends of the plurality of battery cells 400 along the first direction X to play a role in clamping and fixing the plurality of battery cells 400. The second end plate 520 is a metal part. The second end face 521 of the second end plate 520 is substantially a plane, and the second end face 521 is lower than the end cover 410 in the second direction Z. That is, the second end face 521 is located on the side of the end cover 410 away from the body part 610 and is spaced apart from the end cover 410. The distance between the second end face 521 and the end cover 410 in the second direction Z may be equal to the distance H1 between the first end face 511 and the end cover 410 in the second direction Z.

[0089] The second extension part 650 is connected to the other end of the body part 610 opposite to the first extension part 620. By connecting the second extension part 650 to the second end plate 520, one end of the separator 600 can be fixed on the second end plate 520. The structure of the second extension part 650 and the first extension part 620 may be the same. The second extension part 650 is substantially L-shaped. The second extension part 650 includes a third sub-extension part and a fourth sub-extension part. The third sub-extension part extends along the first direction X. The fourth sub-extension part extends along the second direction Z. The third sub-extension part is connected between the fourth sub-extension part and the body part 610. One end of the fourth sub-extension part away from the third sub-extension part is connected to the first end plate 510. The fourth sub-extension part is spaced apart from the battery cell 400, reducing the occurrence of condensation and enrichment of the thermal runaway products of the battery cell 400 between the fourth sub-extension part and the battery cell 400.

[0090] The second end face 521 is lower than the end cover 410 of the battery cell 400. The body part 610 of the separator 600 is connected to the second end plate 520 through the second extension part 650, increasing the creepage distance of the busbar component 700 and the end cover 410 of the battery cell 400 along the separator 600 to the second end plate 520, reducing the possibility of insulation failure between the busbar component 700, the end cover 410 of the battery cell 400 and the second end plate 520, and improving the safety of the battery device 100.

[0091] In some embodiments, the battery device 100 further includes a second insulating cover 820. The second insulating cover 820 is disposed between the first end plate 510 and the battery cell 400 and covers the battery cell 400.

[0092] The structure of the second insulating cover 820 may be the same as that of the first insulating cover 810. The second insulating cover 820 may also include a flat plate part and a surrounding frame part. The surrounding frame part is connected to the outer periphery of the flat plate part. The flat plate part is stacked between the battery cell 400 and the second end plate 520. The surrounding frame part surrounds the outer periphery of the battery cell 400 to cover the outside of the battery cell 400. In this way, the insulation between the battery cell 400 and the second end plate 520 is ensured, and the insulation performance of the battery device 100 is improved.

[0093] In some embodiments, the battery device 100 may further include a strap 900 that surrounds the outer perimeters of the first end plate 510, the second end plate 520, and the plurality of battery cells 400 to fix the first end plate 510, the second end plate 520, and the plurality of battery cells 400. The strap 900 may include one or more straps, and the plurality of straps 900 may be arranged at intervals along the second direction Z to more firmly fix the first end plate 510, the second end plate 520, and the plurality of battery cells 400 together.

[0094] An embodiment of the present application also provides an electrical device, including the battery device 100 of the above embodiment, and the battery device 100 is used to provide electrical energy.

[0095] Please refer to Figures 4 to 6 , an embodiment of the present application provides a battery device 100, including a first end plate 510, a second end plate 520, a strap 900, a separator 600, and a plurality of battery cells 400. The plurality of battery cells 400 are arranged along the first direction X. The first end plate 510 and the second end plate 520 are respectively disposed at two ends of the plurality of battery cells 400 along the first direction X. The strap 900 surrounds the outer perimeters of the first end plate 510, the second end plate 520, and the plurality of battery cells 400 to fix the first end plate 510, the second end plate 520, and the plurality of battery cells 400 together.

[0096] One side of the battery cell 400 along the second direction Z has an end cap 410 and an electrode terminal 430 disposed on the end cap 410, wherein the second direction Z is perpendicular to the first direction X. The first end plate 510 has a first end face 511 on the side where the end cap 410 is located, the second end plate 520 has a second end face 521 on the side where the end cap 410 is located, and both the first end face 511 and the second end face 521 are lower than the end cap 410 in the second direction Z. The distance between the first end face 511 and the end cap 410 in the second direction Z is H1, and the dimension of the battery cell 400 in the second direction Z is H2, where 1 / 10 ≤ H1 / H2 ≤ 1 / 5. The distance between the second end face 521 and the end cap 410 in the second direction Z may be equal to the distance H1 between the first end face 511 and the end cap 410 in the second direction Z.

[0097] The separator plate 600 includes a main body portion 610, a first extension portion 620, and a second extension portion 650. The main body portion 610 is disposed on one side of a plurality of battery cells 400 along the second direction Z. The first extension portion 620 and the second extension portion 650 are respectively connected to two ends of the main body portion 610 along the first direction X. At least a part of the first extension portion 620 is disposed on one side of the first end plate 510 along the first direction X, and is inserted and cooperated with the first end plate 510. And the first extension portion 620 is spaced from the adjacent battery cell 400 in the first direction X. At least a part of the second extension portion 650 is disposed on one side of the second end plate 520 along the second direction Z, and is inserted and cooperated with the second end plate 520. And the second extension portion 650 is spaced from the adjacent battery cell 400 in the second direction Z. The battery device 100 further includes an output terminal 710 and a plurality of busbar components 700. A plurality of busbar components 700 are respectively connected to both sides of the main body portion 610 along the second direction Z, and the busbar components 700 on each side are arranged at intervals along the first direction X. Each busbar component 700 is electrically connected to the electrode terminals 430 of two adjacent battery cells 400. The output terminal 710 is disposed on the side of the main body portion 610 facing the first end plate 510. One end of the output terminal 710 is electrically connected to the electrode terminal 430, and the other end extends to one side of the first end plate 510 along the second direction Z and is spaced from the first end plate 510.

[0098] In the above-mentioned battery device 100, the heights of the first end face 511 and the second end face 521 in the second direction Z are reduced, so that the first end face 511 and the second end face 521 are respectively spaced from the end caps 410 of the battery cells 400, extending the creepage distances along the separator plate 600 between the output terminal 710, the busbar components 700, the end caps 410 of the battery cells 400 and the first end plate 510, and the creepage distances along the separator plate 600 between the output terminal 710, the busbar components 700, the end caps 410 of the battery cells 400 and the second end plate 520. Furthermore, the possibility of insulation failure between the output terminal 710, the busbar components 700, the end caps 410 of the battery cells 400 and the first end plate 510 and the second end plate 520 is reduced, improving the safety of the battery device 100.

[0099] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A plurality of battery cells, the plurality of battery cells are arranged along a first direction, one side of the battery cell along a second direction has an end cap and electrode terminals provided on the end cap, and the second direction intersects the first direction; A busbar component, electrically connected to the electrode terminals; A first end plate, disposed on the outermost side of the plurality of battery cells along the first direction and insulated from the battery cells, the first end plate has a first end face on the side where the end cap is located, and the first end face is lower than the end cap in the second direction; A separator plate, including a body portion and a first extension portion, the body portion is disposed on one side of the plurality of battery cells along the second direction, and the busbar component is disposed on the body portion, the first extension portion is disposed on one side of the first end plate along the second direction and is connected to the body portion and the first end plate.

2. The battery device according to claim 1, wherein The distance between the first end face and the end cap in the second direction is H1, the dimension of the battery cell in the second direction is H2, and 1 / 10 ≤ H1 / H2 ≤ 1 / 5.

3. The battery device according to claim 1, characterized in that The first extension portion includes a first sub-extension portion and a second sub-extension portion, the first sub-extension portion extends along the first direction, the second sub-extension portion extends along the second direction, the first sub-extension portion is connected between the second sub-extension portion and the body portion, one end of the second sub-extension portion away from the first sub-extension portion is connected to the first end plate, and the second sub-extension portion is spaced from the battery cell.

4. The battery device according to claim 3, characterized in that, At least a part of the first sub-extension portion protrudes in a direction away from the battery cell and / or is recessed in a direction towards the battery cell.

5. The battery device according to claim 4, characterized in that, The cross-section of the first sub-extension portion perpendicular to a third direction is at least partially serrated or wavy, wherein the first direction, the second direction and the third direction are perpendicular to each other in pairs.

6. The battery device according to any one of claims 1 to 5, characterized in that, One of the first extension portion and the first end plate is provided with a limiting post, and the other is provided with a limiting hole, and the limiting post is inserted into the limiting hole.

7. The battery device according to any one of claims 1 to 5, characterized in that, The battery device further includes an output pole, the output pole is disposed on the body portion, one end of the output pole is electrically connected to the electrode terminal, and the other end extends to one side of the first end plate along the second direction and is spaced from the first end plate.

8. The battery device according to any one of claims 1 to 5, characterized in that, The battery device further includes a first insulating cover, the first insulating cover is disposed between the first end plate and the battery cell and surrounds the outer periphery of the battery cell.

9. The battery device according to any one of claims 1 to 5, characterized in that, The battery device further includes a second end plate, the second end plate is disposed on the other outermost side of the plurality of battery cells relative to the first end plate and is insulated from the battery cells, the second end plate has a second end face on the side where the end cap is located, and the second end face is lower than the end cap in the second direction, the separator plate further includes a second extension portion, the second extension portion is disposed on one side of the second end plate along the second direction and is respectively connected to the body portion and the second end plate.

10. The battery device according to claim 9, characterized in that, The battery device further includes a second insulating cover, the second insulating cover is disposed between the second end plate and the battery cell and surrounds the outer periphery of the battery cell.

11. An electrical device, characterized in that, Comprising a battery device as described in any one of claims 1 to 10, the battery device being used to provide electrical energy.

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