Battery cell bottom supporting plate and battery device

Abstract

The utility model discloses a battery cell bottom supporting plate and a battery device, and relates to the technical field of batteries, the battery device comprises a battery cell bottom supporting plate and at least two battery cells, and the battery cell bottom supporting plate is provided with a first partition plate; the battery cell bottom supporting plate is configured to support the battery cells, and the first partition plate is configured to separate two adjacent battery cells. According to the technical scheme provided by the utility model, the problem of black spots or lithium precipitation caused by unsmooth gas production of formation, aging, circulation, storage and the like is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a bottom support plate of battery cell and battery device. BACKGROUND

[0002] The bottom support plate of battery cell is the component part of battery device, and the battery device mainly includes a battery shell, battery cells located in the battery shell, and a bottom support plate of battery cell arranged at the bottom of the battery shell.

[0003] In the related art, the battery cells are tightly attached to each other in the battery shell, and the battery cells produce gas during the charging and lithium embedding process such as formation, aging, cycling, and storage. Since the battery cells expand and the battery cells are close to each other, the gas is difficult to discharge, and the problem of black spots or lithium precipitation caused by poor gas production during formation, aging, cycling, and storage may occur. SUMMARY

[0004] In view of the above problems, the present application provides a bottom support plate of battery cell and a battery device, which aims to solve the problem of black spots or lithium precipitation caused by poor gas production during formation, aging, cycling, and storage.

[0005] The present application provides a battery device, which includes a bottom support plate of battery cell and at least two battery cells. The bottom support plate of battery cell is provided with a first partition plate. The bottom support plate of battery cell is configured to support the battery cells, and the first partition plate is configured to separate two adjacent battery cells.

[0006] In the technical solution of the present application, the technical solution of the utility model uses the bottom support plate of battery cell to support the battery cells, so that the battery cells maintain a certain gap with the bottom wall of the battery shell. The first partition plate is used to separate two adjacent battery cells to increase the gap between the two adjacent battery cells, so that a wider exhaust passage is maintained between the two adjacent battery cells. The gas produced by the battery cells during the charging and lithium embedding process such as formation, aging, cycling, and storage can be smoothly discharged outward through the exhaust passage, thereby effectively solving the problem of black spots or lithium precipitation caused by poor gas production during formation, aging, cycling, and storage. At the same time, the problem of safety thermal runaway gas trapped inside the battery shell, which causes the top cover to be lifted and fly, can also be solved, so that the battery device can pass the national standard test.

[0007] In some embodiments, the first partition plate is provided with a pressing space. With such a design, during the charging process, the adjacent battery cells will move closer to each other, and due to the first partition plate being provided with a pressing space, the first partition plate can be pressed upward, so that the electrolyte at the bottom of the cell bottom plate is pressed to the battery cell, which can improve the back suction effect of the electrolyte by the battery cell; and during the discharging process, the adjacent battery cells will move away from each other, which can make the first partition plate be pressed downward, so that the electrolyte at the battery cell flows back to the bottom of the cell bottom plate, which can improve the backflow effect of the electrolyte. Therefore, the design of the pressing space can solve the problem of difficult electrolyte back suction or backflow between battery cells, so as to avoid the problem of interface black spots caused by insufficient electrolyte between battery cells.

[0008] In some embodiments, the first partition plate includes a plurality of partition plates, and the plurality of partition plates enclose the pressing space. With such a design, a plurality of partition plates are used to enclose the pressing space, which has a simple structure design and can effectively improve the back suction effect of the electrolyte by the battery cell and the backflow effect of the electrolyte.

[0009] In some embodiments, the first partition plate includes two partition plates, and the two partition plates enclose the pressing space, and the opening of the pressing space faces away from the battery cell. With such a design, the two partition plates can form a first partition plate in the shape of an inverted "V", which can make the first partition plate be better pressed upward or downward, which can further improve the back suction effect of the electrolyte by the battery cell and further improve the backflow effect of the electrolyte.

[0010] In some embodiments, the first partition plate is bent to form the pressing space. With such a design, only one complete first partition plate can be bent to form the pressing space, which simplifies the subsequent assembly process of multiple plates.

[0011] In some embodiments, the cell bottom plate further includes a first extension plate, and the top of the first partition plate is provided with an upwardly extending first extension plate. With such a design, not only can the first partition plate separate the position close to the bottom between the adjacent two battery cells, but also the first extension plate can separate other positions between the adjacent two battery cells, which can improve the separation effect between the adjacent two battery cells, so that the adjacent two battery cells can better maintain a wider exhaust passage. In addition, the design of the first extension plate can also play a role in guiding the gas to be quickly discharged outward.

[0012] In some embodiments, the cell bottom support plate comprises a bottom support plate body, the bottom support plate body comprises support plates and first partition plates arranged alternately, the support plates are configured to support the cells. Such a design can enable each cell to be supported by a support plate, improve the insulation effect between the cells and the bottom wall of the battery case, and enable each adjacent two cells to be separated by a first partition plate, so that the gas generated by the cells during charging, embedding lithium, formation, aging, cycling, storage and the like can be more smoothly discharged outward.

[0013] In some embodiments, the battery device further comprises a battery case, the cell bottom support plate and the cells are arranged in the battery case; the outer side edge of the cell bottom support plate is provided with a second partition plate, the second partition plate is configured to separate the cells and the battery case. Such a design can effectively separate the cells and the battery case by the design of the second partition plate, increase the gap between the cells and the battery case, effectively insulate the cells and the battery case, and also keep a relatively wide exhaust passage between the cells and the battery case, so that the gas generated by the cells during charging, embedding lithium, formation, aging, cycling, storage and the like can be more smoothly discharged outward, improving the exhaust effect.

[0014] In some embodiments, one side of the second partition plate is configured to be inclined toward the direction of the battery case. Such a design can form a squeezed space between the second partition plate, the battery case and the cells. During charging, the cells and the battery case will approach each other, and the second partition plate can be squeezed upward to squeeze the electrolyte at the bottom of the cell bottom support plate to the cells, thereby improving the back suction effect of the cells on the electrolyte. During discharging, the cells and the battery case will move away from each other, and the second partition plate can be squeezed downward to make the electrolyte at the cells flow back to the bottom of the cell bottom support plate, thereby improving the backflow effect of the electrolyte.

[0015] In some embodiments, the cell bottom support plate further comprises a second extension plate, the top of the second partition plate is provided with an upwardly extending second extension plate. Such a design can separate the cells and the battery case at the position close to the bottom by the second partition plate, and separate the cells and the battery case at other positions by the second extension plate, thereby improving the separation effect between the cells and the battery case, and keeping better insulation effect between the cells and the battery case. In addition, the design of the second extension plate can also play a role in guiding the gas to be discharged outward quickly.

[0016] In some embodiments, the cell bottom support plate is provided with a through hole. Such a design can make the electrolyte flow between the bottom of the cell bottom support plate and the cells, thereby improving the wettability of the electrolyte.

[0017] The application further provides an electric cell bottom supporting plate, which is used in the above battery device.

[0018] The above description is only a summary of the technical scheme of the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor.

[0020] FIG. 1 FIG. 1 is a structural schematic diagram of an embodiment of the electric cell bottom supporting plate of the present application;

[0021] FIG. 2 FIG. 2 is a structural schematic diagram of another embodiment of the electric cell bottom supporting plate of the present application;

[0022] FIG. 3 FIG. 3 is a sectional view of an embodiment of the battery device of the present application;

[0023] FIG. 4 FIG. 4 is a sectional view of another embodiment of the battery device of the present application.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] Reference numerals Names Reference numerals Names 1000 Battery device 13 Second partition plate 100 Battery cell bottom support plate 10a Through hole 10 Bottom support plate body 20 First extension plate 11 Support plate 30 Second extension plate 12 First partition plate 200 Battery case 12a Extrusion space 210 Exhaust hole 121 Partition plate 300 Battery cell

[0026] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0027] The embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of the present application, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0030] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various locations in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing", and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two components or interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] Battery devices referred to in the art are also called batteries, and can be classified into primary batteries and secondary batteries depending on whether they are rechargeable. Currently common types of rechargeable batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. Lithium-ion batteries used for such purposes have relatively low capacity, but have large output, charging current, and long service life, but are relatively expensive.

[0035] The batteries described in the embodiments of the present application refer to secondary batteries. In the following, embodiments disclosed in the present application will be described mainly with lithium-ion batteries as examples. It should be understood that embodiments disclosed in the present application are applicable to any other appropriate type of secondary battery. Batteries referred to in embodiments disclosed in the present application can be directly or indirectly applied to appropriate devices to power the devices.

[0036] The batteries referred to in embodiments disclosed in the present application refer to single physical modules including one or more cells to provide predetermined voltage and capacity. A cell is a basic unit in a battery, and can be classified into cylindrical cells, cuboid cells, and pouch cells in a packaging manner. In the following, embodiments described below will be mainly developed around cuboid cells. It should be understood that embodiments described below are also applicable to cylindrical cells or pouch cells in some aspects.

[0037] A cell includes a positive electrode tab, a negative electrode tab, an electrolyte, and a separator. A lithium-ion cell mainly works by moving lithium ions between a positive electrode tab and a negative electrode tab. In a cylindrical cell, a thin film structure of three layers is wound into a cylindrical electrode assembly, while in a cuboid cell, the thin film structure is wound or stacked into an electrode assembly having a substantially cuboid shape.

[0038] In a general cell structure, a cell includes a housing, an electrode assembly, and an electrolyte. The electrode assembly is accommodated in the housing of the cell, and the electrode assembly includes a positive electrode tab, a negative electrode tab, and a separator. The housing includes a housing body and an opening. The end cap is arranged at the opening to close the accommodation cavity. In addition to the electrode assembly, the accommodation cavity also accommodates the electrolyte. The positive electrode tab and the negative electrode tab in the electrode assembly include tabs. In order to avoid fusing caused by a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The tabs are electrically connected to electrode terminals located outside the cell through connecting members. The electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For a cuboid cell, the electrode terminals are generally provided in the end cap portion. A plurality of cells are connected in series and / or parallel together via the electrode terminals to be applied to various application occasions.

[0039] The battery device provided by the embodiments of the present application can be a power source for an electric device. The electric device can be a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game machine, an electric automobile toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer.

[0040] To facilitate understanding of the cell bottom supporting plate and the battery device provided by the embodiments of the present application, first, the application scenario of the cell bottom supporting plate and the battery device is introduced. The cell bottom supporting plate is a component of the battery device. The battery device mainly includes a battery shell, a cell located in the battery shell, and a cell bottom supporting plate arranged at the bottom of the battery shell. The cell bottom supporting plate is used to support the cell, so that the cell maintains a certain gap with the inner wall of the battery shell. At the same time, the cell bottom supporting plate is provided with through holes corresponding to the openings on the mylar film outside the cell. The electrolyte in the battery shell passes through the through holes on the cell bottom supporting plate and the openings on the mylar film to enter between the cell and the mylar film, so that the cell is in a state of electrolyte immersion.

[0041] The cell bottom supporting plate is a component of the battery device. The battery device mainly includes a battery shell, a cell located in the battery shell, and a cell bottom supporting plate arranged at the bottom of the battery shell. The cell bottom supporting plate is used to support the cell, so that the cell maintains a certain gap with the inner wall of the battery shell. In the assembly process of the battery device, the battery shell can include a bottom shell and an upper cover. First, the cell bottom supporting plate and the cell are sequentially placed in the bottom shell, and then the upper cover is arranged on the bottom shell, so that the cell and the cell bottom supporting plate are located in the battery shell.

[0042] In the related art, the adjacent cells in the battery shell are tightly attached together. The cells generate gas in the charging and lithium embedding process such as formation, aging, cycling, and storage. Since the cells swell and the cells are close to each other, the gas is difficult to discharge, which can cause the problem of black spots or lithium precipitation due to poor gas production in formation, aging, cycling, and storage.

[0043] Based on the above problems, the utility model provides a battery device 1000, aims at solving the problem of black spot or lithium precipitation caused by poor gas production of formation, aging, cycle, storage and the like. The battery device 1000 includes the electric core bottom support plate 100, the battery device 1000 still includes the battery shell 200 and the at least two electric cores 300 arranged in the battery shell 200, the electric core bottom support plate 100 is arranged in the battery shell 200 and is located at the bottom of the electric core 300, is used for supporting the electric core 300. The specific drawings and examples are combined below to be described in detail.

[0044] Please refer to FIG. 1 to FIG. 4 In an embodiment of the utility model, the battery device 1000 includes the electric core bottom support plate 100 and the at least two electric cores 300, and the electric core bottom support plate 100 is provided with the first partition plate 12; the electric core bottom support plate 100 is configured to support the electric core 300, and the first partition plate 12 is configured to separate the two adjacent electric cores 300.

[0045] It can be understood that the electric core bottom support plate 100 is used to support the electric core 300, so that the electric core 300 and the bottom wall of the battery shell 200 maintain a certain gap, which plays an insulating effect between the electric core 300 and the battery shell 200, and the first partition plate 12 of the electric core bottom support plate 100 is used to separate the two adjacent electric cores 300, which can effectively increase the gap between the two adjacent electric cores 300, and the electric core 300 will not block the gas discharge when swelling during the charging process.

[0046] In actual application, the number of the first partition plate 12 can be one, two, three and the like, which can be determined according to the number of the electric core 300.

[0047] As some examples, when the number of the electric core 300 is two, the number of the first partition plate 12 is one, so as to separate the two electric cores 300 through the first partition plate 12; when the number of the electric core 300 is three, the number of the first partition plate 12 is two, so as to separate the two adjacent electric cores 300 through the two first partition plates 12, and so on.

[0048] In actual application, the first partition plate 12 can be a flat plate, or a bent plate, an arc-shaped plate and the like, as long as it can effectively separate the two adjacent electric cores 300.

[0049] In summary, in the technical scheme of the embodiment of the application, the technical scheme of the utility model discloses a bottom support plate 100 for supporting the battery cell 300, so that the battery cell 300 and the bottom wall of the battery shell 200 have a certain gap, and a first partition plate 12 is used to separate the two adjacent battery cells 300, so as to increase the gap between the two adjacent battery cells 300, so that the two adjacent battery cells 300 have a wider exhaust passage, and the gas generated in the charging and lithium embedding process of the battery cell 300 can be smoothly discharged outward through the exhaust passage, thereby effectively solving the problem of black spots or lithium precipitation caused by poor gas production in formation, aging, cycling, storage and the like, and also solving the problem of the safety thermal runaway gas being trapped in the inside of the battery shell 200, causing the top cover to be lifted and flown, so that the battery device 1000 passes the national standard test.

[0050] Referring to FIG. 4 , the first partition plate 12 can be used to separate the larger area front or back surface of the two adjacent battery cells 300, of course, the first partition plate 12 can also be used to separate the smaller area side surface of the two adjacent battery cells 300, or the larger area front or back surface and the smaller area side surface of the two adjacent battery cells 300 are both separated by the first partition plate 12.

[0051] In actual application, the height of the first partition plate 12 can be 10cm-100cm.

[0052] As some examples, the height of the first partition plate 12 can be 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm, 90cm, 100cm and the like.

[0053] Please refer to FIG. 1 , FIG. 3 In an embodiment of the utility model, the first partition plate 12 is provided with an extrusion space 12a.

[0054] Such design, in the charging process, the adjacent battery cells 300 will be close to each other, because the first partition plate 12 is provided with the extrusion space 12a, the first partition plate 12 can be extruded upward, so that the electrolyte at the bottom of the battery cell bottom support plate 100 is extruded to the battery cell 300, which can improve the back suction effect of the electrolyte of the battery cell 300, and in the discharging process, the adjacent battery cells 300 will be away from each other, which can make the first partition plate 12 be extruded downward, so that the electrolyte at the battery cell 300 flows back to the bottom of the battery cell bottom support plate 100, which can improve the backflow effect of the electrolyte. Therefore, the design of the extrusion space 12a can solve the problem of difficult electrolyte back suction or backflow between the battery cells 300, so as to avoid the problem of interface black spots caused by insufficient electrolyte of the battery cell 300.

[0055] It should be noted that the extrusion space 12a refers to a space capable of extruding the first partition plate 12 upward or downward.

[0056] In actual application, the first partition plate 12 can be a bent plate or a wave-shaped plate, as long as the extrusion space 12a is provided.

[0057] In an embodiment of the utility model, the first partition plate 12 includes a plurality of partition plates 121, and the plurality of partition plates 121 enclose the extrusion space 12a.

[0058] Such design, using a plurality of partition plates 121 to enclose the extrusion space 12a, the structure design is simple, and can effectively improve the back suction effect of the battery cell 300 on the electrolyte and the backflow effect of the electrolyte.

[0059] In actual application, the first partition plate 12 can include three, four, five or more continuous or intermittent partition plates 121.

[0060] Please refer to FIG. 1 In another embodiment of the utility model, the first partition plate 12 includes two partition plates 121, and the two partition plates 121 enclose the extrusion space 12a, and the opening of the extrusion space 12a faces away from the battery cell 300.

[0061] Such design can make the two partition plates 121 form a first partition plate 12 in the shape of inverted "V", which can make the first partition plate 12 be better extruded upward or downward, and can further improve the back suction effect of the battery cell 300 on the electrolyte, and can further improve the backflow effect of the electrolyte.

[0062] Of course, in other embodiments, the opening of the extrusion space 12a enclosed by the two partition plates 121 can also face the side close to the battery cell 300 to form a first partition plate 12 in the shape of "V".

[0063] In actual application, the length of the partition plate 121 can be 10cm-100cm. And the length of each partition plate 121 can be the same or different.

[0064] As some examples, the length of the partition plate 121 can be 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm, 90cm, 100cm, etc.

[0065] In actual application, the included angle between the two partition plates 121 can be 0-180°.

[0066] As some examples, the included angle between the two partitions 121 can be 5°, 10°, 30°, 60°, 90°, 110°, 120°, 135°, 160°, 175°, etc.

[0067] In another embodiment of the present invention, the first partition plate 12 is bent to form a compression space 12a.

[0068] This design allows for the formation of the compression space 12a by bending a single complete first partition plate 12, simplifying the subsequent assembly process of multiple plates.

[0069] In practical applications, the first partition plate 12 can be bent once, twice, or multiple times, as long as it can form a compression space 12a.

[0070] Please see FIG. 2 , FIG. 4 In one embodiment of the present invention, the cell base plate 100 further includes a first extension plate 20, and the top of the first partition plate 12 is provided with an upwardly extending first extension plate 20.

[0071] This design not only separates the bottom portion of two adjacent cells 300 using the first partition plate 12, but also separates other portions of two adjacent cells 300 using the first extension portion. This improves the separation effect between adjacent cells 300, allowing for a wider exhaust passage between them. Furthermore, the first extension plate 20 also serves as a venting guide, enabling gases to be quickly expelled.

[0072] In practical applications, the first partition plate 12 and the first extension plate 20 can be an integral structure or separate structures. When the first partition plate 12 and the first extension plate 20 are separate structures, the first partition plate 12 and the first extension plate 20 can be connected by welding, bonding, screw connection, plug-in connection, snap-fit ​​connection, etc.

[0073] Optionally, the first extension plate 20 can be connected to the junction of the two partitions 121.

[0074] This design allows the first extension plate 20 to be located in the middle between two adjacent cells 300, so that the gap between the two sides of the first extension plate 20 and the cells 300 is consistent, so that exhaust passages of consistent width are formed on both sides of the first extension plate 20, allowing gas to be smoothly discharged outward through the exhaust passages.

[0075] Please see FIG. 1 , FIG. 3In an embodiment of the utility model, the electric core bottom support plate 100 includes a bottom support plate main body 10, the bottom support plate main body 10 includes alternately arranged support plate 11 and first partition plate 12, and the support plate 11 is configured to support the electric core 300.

[0076] Such design can make each electric core 300 be supported by a support plate 11, improve the insulation effect between the electric core 300 and the bottom wall of the battery shell 200, and make each adjacent two electric cores 300 be separated by the first partition plate 12, so that the gas generated in the charging lithium embedding process of the electric core 300 in formation, aging, circulation, storage and the like can be more smoothly discharged outward.

[0077] In actual application, the support plate 11 and the first partition plate 12 can be an integral structure or a split structure. When the support plate 11 and the first partition plate 12 are a split structure, the support plate 11 and the first partition plate 12 can be connected by welding, bonding, screw connection, plug-in connection, clamping and the like.

[0078] In actual application, the support plate 11 can also be a flat plate, a flat plate provided with a protrusion, or a plate body with an arc shape, as long as it can effectively support the electric core 300.

[0079] In actual application, the thickness of the support plate 11 and the first partition plate 12 can be 0.1cm-10cm. Moreover, the thickness of the support plate 11 and the thickness of the first partition plate 12 can be the same or different.

[0080] As some examples, the thickness of the support plate 11 and the first partition plate 12 can be 0.1cm, 1cm, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, 9cm, 10cm and the like.

[0081] Please refer to FIG. 1 、 FIG. 3 In an embodiment of the utility model, the battery device 1000 further includes a battery shell 200, and the electric core bottom support plate 100 and the electric core 300 are arranged in the battery shell 200; the outer side edge of the electric core bottom support plate 100 is provided with a second partition plate 13, and the second partition plate 13 is configured to separate the electric core 300 and the battery shell 200.

[0082] The design of the second partition plate 13 can effectively separate the battery cell 300 and the battery shell 200, increase the gap between the battery cell 300 and the battery shell 200, effectively insulate the battery cell 300 and the battery shell 200, and keep a wide exhaust passage between the battery cell 300 and the battery shell 200, so that the gas generated in the lithium embedding process of the battery cell 300 in formation, aging, circulation, storage and the like can be smoothly discharged outward through the exhaust passage, and the exhaust effect is improved.

[0083] In actual application, the second partition plate 13 can be a flat plate, a bent plate or an arc-shaped plate, as long as it can effectively separate the battery cell 300 and the battery shell 200.

[0084] In actual application, the height of the second partition plate 13 can be 10cm-100cm.

[0085] As some examples, the height of the second partition plate 13 can be 10cm, 20cm, 30cm, 40cm, 50cm, 60cm, 70cm, 80cm, 90cm, 100cm and the like.

[0086] Please refer to FIG. 1 , FIG. 3 In an embodiment of the utility model, one side of the second partition plate 13 is configured to be inclined towards the direction of the battery shell 200.

[0087] The inclined second partition plate 13 can form a space to be extruded between the battery shell 200 and the battery cell 300, and in the charging process, the battery cell 300 and the battery shell 200 can be close to each other, and the second partition plate 13 can be extruded upwards to extrude the electrolyte at the bottom of the battery cell bottom plate 100 to the battery cell 300, so as to improve the back suction effect of the electrolyte on the battery cell 300.

[0088] Please refer to FIG. 2 , FIG. 4 In an embodiment of the utility model, the battery cell bottom plate 100 further comprises a second extension plate 30, and the top of the second partition plate 13 is provided with the second extension plate 30 extending upwards.

[0089] The design can not only separate the position close to the bottom between the battery cell 300 and the battery shell 200 through the second partition plate 13, but also separate other positions between the battery cell 300 and the battery shell 200 through the second extension plate 30, so that the separation effect between the battery cell 300 and the battery shell 200 can be improved, and better insulation effect between the battery cell 300 and the battery shell 200 can be maintained. In addition, the design of the second extension plate 30 can also play a role in guiding gas, so that the gas can be quickly discharged outward.

[0090] In actual application, the second partition plate 13 and the second extension plate 30 can be an integral structure or a split structure. When the second partition plate 13 and the second extension plate 30 are a split structure, the second partition plate 13 and the second extension plate 30 can be connected by welding, bonding, screw connection, plug-in connection, clamping, or the like.

[0091] Please refer to FIG. 1 、 FIG. 2 In an embodiment of the utility model, the battery cell bottom supporting plate 100 is provided with a through hole 10a.

[0092] The design of the through hole 10a can make the electrolyte flow between the bottom of the battery cell bottom supporting plate 100 and the battery cell 300, so that the soaking effect of the electrolyte can be improved.

[0093] Optionally, when the battery cell bottom supporting plate 100 includes the supporting plate 11, the first partition plate 12, the second partition plate 13, the first extension plate 20, and the second extension plate 30, the supporting plate 11, the first partition plate 12, the second partition plate 13, the first extension plate 20, and the second extension plate 30 can all be provided with the through hole 10a.

[0094] In actual application, the radius R of the through hole 10a can be 1cm-50cm.

[0095] As some examples, the radius R of the through hole 10a can be 1cm, 10cm, 15cm, 20cm, 25cm, 30cm, 35cm, 40cm, 45cm, 50cm, or the like.

[0096] Please refer to FIG. 3 、 FIG. 4 The utility model also provides a battery cell bottom supporting plate 100, and a battery device 1000 includes the battery cell bottom supporting plate 100, and the specific structure of the battery device 1000 refers to the above-mentioned embodiments, since the battery cell bottom supporting plate 100 adopts all the technical solutions of the above-mentioned embodiments, at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0097] According to some embodiments of the present application, the present application provides a battery device 1000, in combination with FIG. 1 to FIG. 4 The battery device 1000 comprises a battery shell 200, and a cell bottom support plate 100 and at least two cell bodies 300 arranged in the battery shell 200; the cell bottom support plate 100 comprises a bottom support plate body 10, and the bottom support plate body 10 comprises support plates 11 and first partition plates 12 arranged alternately; the support plates 11 are configured to support the cell bodies 300, and the first partition plates 12 are configured to separate two adjacent cell bodies 300. The first partition plate 12 comprises two partition plates 121 arranged at an angle, and the two partition plates 121 form a downward opening extrusion space 12a. The top of the first partition plate 12 is provided with a first extension plate 20 extending upward. The outer side edge of the support plate 11 is provided with a second partition plate 13, and the second partition plate 13 is configured to separate the cell body 300 from the battery shell 200. The cell bottom support plate 100 further comprises a second extension plate 30, and the top of the second partition plate 13 is provided with a second extension plate 30 extending upward.

[0098] In the technical scheme of the present application, the support plates 11 are used to support the cell bodies 300, so that the cell bodies 300 and the bottom wall of the battery shell 200 maintain a certain gap, and the first partition plates 12 are used to separate two adjacent cell bodies 300, so as to increase the gap between the two adjacent cell bodies 300, so that a wider exhaust passage is maintained between the two adjacent cell bodies 300; the first extension part can also be used to separate other positions between the two adjacent cell bodies 300, so as to improve the separation effect between the two adjacent cell bodies 300; and the second partition plate 13 is used to separate the cell body 300 from the battery shell 200, so as to increase the gap between the cell body 300 and the battery shell 200, which not only can effectively insulate the cell body 300 from the battery shell 200, but also can maintain a wider exhaust passage between the cell body 300 and the battery shell 200; the second extension plate 30 can also be used to separate other positions between the cell body 300 and the battery shell 200, so as to improve the separation effect between the cell body 300 and the battery shell 200, so that better insulation effect can be maintained between the cell body 300 and the battery shell 200; therefore, the gas generated in the charging and lithium embedding process of the cell body 300 such as formation, aging, cycling and storage can be smoothly discharged outward through the exhaust passage, so as to effectively solve the problem of black spots or lithium precipitation caused by poor gas production in the formation, aging, cycling and storage.

[0099] In an embodiment, the top of the battery shell 200 can be provided with an exhaust hole 210, and the gas generated in the charging and lithium embedding process of the cell body 300 such as formation, aging, cycling and storage can be smoothly discharged to the exhaust hole 210 through the exhaust passage, and then discharged outward through the exhaust hole 210.

[0100] The above merely illustrates the exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the technical concept of the present application and by using the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises a cell bottom support plate and at least two cells, wherein the cell bottom support plate is provided with a first partition plate; The cell bottom support plate is configured to support the cells, and the first partition plate is configured to separate two adjacent cells.

2. The battery device of claim 1, wherein The first partition plate is provided with a pressing space.

3. The battery device of claim 2, wherein The first partition plate comprises a plurality of partition plates, and the plurality of partition plates enclose the pressing space.

4. The battery device of claim 2, wherein The first partition plate comprises two partition plates, and the two partition plates enclose the pressing space, and an opening of the pressing space is directed away from the cells.

5. The battery device of claim 2, wherein The first partition plate is bent to form the pressing space.

6. The battery device according to any one of claims 1 to 5, wherein The cell bottom support plate further comprises a first extension plate, and a top of the first partition plate is provided with the first extension plate extending upward.

7. The battery device according to any one of claims 1 to 5, wherein The cell bottom support plate comprises a bottom support plate body, and the bottom support plate body comprises alternately arranged support plates and the first partition plates, and the support plates are configured to support the cells.

8. The battery device according to any one of claims 1 to 5, wherein The battery device further comprises a battery shell, and the cell bottom support plate and the cells are arranged in the battery shell. An outer side edge of the cell bottom support plate is provided with a second partition plate, and the second partition plate is configured to separate the cells from the battery shell.

9. The battery device of claim 8, wherein, One side of the second partition plate is configured to be inclined toward the direction of the battery shell.

10. The battery device of claim 8, wherein The cell bottom support plate further comprises a second extension plate, and a top of the second partition plate is provided with the second extension plate extending upward.

11. The battery device of any one of claims 1 to 5, wherein, The cell bottom support plate is provided with a through hole.

12. An electrode base plate, characterized by comprising: The cell bottom support plate is the cell bottom support plate in the battery device according to any one of claims 1 to 11.

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