Tab bracket, battery monomer and battery
By designing a movable extreme ear bracket, the problem of low versatility of the existing bracket is solved, flexible adjustment of bracket size is achieved, and battery cells of different specifications is adapted to improve versatility and avoid the risk of short circuit.
Patent Information
- Application Number
- CN202421945585.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The existing extreme ear brackets have single size and low versatility, and cannot be used for electrode assembly of multiple sizes.
An extreme ear bracket is designed, which includes a first and second bracket that is movable, by moving the first and second rods, the size of the bracket can be varied in the first direction to accommodate different specifications of battery cells.
It realizes the versatility of the extreme ear bracket, can be suitable for battery cells of various specifications, improves the versatility of the bracket, and avoids the risk of short circuit caused by the insertion of the extreme ear into the core.
Smart Images
Figure CN222980545U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of batteries, and particularly to an ear tab bracket, a battery cell, and a battery. Background Art
[0002] In a blade battery cell, when welding the top cover and the aluminum shell, the ear tabs in the electrode assembly may be pressed and inserted into the inside of the winding core, causing a short circuit inside the battery cell.
[0003] Based on this, in the related art, an ear tab bracket is added between the top cover and the electrode assembly to support the ear tabs through the ear tab bracket, so as to prevent the ear tabs from being inserted into the winding core of the electrode assembly.
[0004] However, the existing ear tab brackets have a single size specification and low versatility, and cannot be applied to electrode assemblies of various size specifications. Utility Model Content
[0005] This application provides an ear tab bracket, a battery cell, and a battery to solve the problem of low versatility of the existing ear tab brackets.
[0006] In a first aspect, an embodiment of this application provides an ear tab bracket for supporting the ear tabs in a battery cell. The ear tab bracket includes a first bracket and a second bracket. The first bracket includes a plurality of first rods, which are sequentially connected and can move relative to each other in a first direction to change the size of the first bracket in the first direction. Both ends of the second bracket are correspondingly connected to both ends of the first bracket. The second bracket includes a plurality of second rods, which are sequentially connected and can move relative to each other in the first direction, so that the size of the second bracket in the first direction can change with the size of the first bracket.
[0007] Considering the technical problem of the single size specification and low versatility of the existing ear tab brackets in the prior art, the embodiment of this application can change the size of the first bracket in the first direction by moving one or more first rods, and change the size of the second bracket in the first direction by moving one or more second rods, so that the ear tab bracket can meet the application requirements of battery cells of various specifications.
[0008] In some possible designs, the plurality of first rods and the plurality of second rods are both configured as hollow tubular structures, and two adjacent first rods are sleeved, and two adjacent second rods are sleeved.
[0009] By the above solution, moving at least one of two adjacent first rods can change the area of the sleeved area of the two adjacent first rods, and further change the total dimension of the multiple first rods in the first direction, so as to change the dimension of the first bracket in the first direction. Similarly, moving at least one of two adjacent second rods can change the area of the sleeved area of the two adjacent second rods, and further change the total dimension of the multiple second rods in the first direction, so as to change the dimension of the second bracket in the first direction.
[0010] In some possible designs, the multiple first rods and the multiple second rods are both configured as strip structures, and two adjacent first rods are slidably connected, and two adjacent second rods are slidably connected.
[0011] By the above solution, sliding at least one of two adjacent first rods can change the area of the slidably connected area of the two adjacent first rods, and further change the total dimension of the multiple first rods in the first direction, so as to change the dimension of the first bracket in the first direction. Similarly, sliding at least one of two adjacent second rods can change the area of the slidably connected area of the two adjacent second rods, and further change the total dimension of the multiple second rods in the first direction, so as to change the dimension of the second bracket in the first direction.
[0012] In some possible designs, when two adjacent first rods are sleeved and two adjacent second rods are sleeved: the dimensions of each first rod in the second direction are different, and the multiple first rods are sleeved in sequence with the increase or decrease of the dimension; the dimensions of each second rod in the second direction are different, and the multiple second rods are sleeved in sequence with the increase or decrease of the dimension. Wherein, the second direction is perpendicular to the first direction.
[0013] By the above solution, in the first direction, the multiple first rods and the multiple second rods can both retract or extend in sequence according to the increasing or decreasing of the dimensions in the second direction. Compared with other sleeved methods, in this sleeved method, when the multiple first rods and the multiple second rods can both retract in sequence according to the increasing or decreasing of the dimensions in the second direction, in the first direction, the dimensions of the first bracket and the second bracket can reach the minimum, the dimension range of the first bracket and the second bracket is the largest, and the versatility of the tab bracket is the highest.
[0014] In some possible designs, when two adjacent first rods are sleeved and two adjacent second rods are sleeved: the multiple first rods and the multiple second rods both include a first part and a second part; in the second direction, the dimension of the first part of the first rod is different from the dimension of the second part of the first rod, and the second part of the first rod is sleeved at both ends of the first part of the first rod; the dimension of the first part of the second rod is different from the dimension of the second part of the second rod, and the second part of the second rod is sleeved at both ends of the first part of the second rod. Wherein, the second direction is perpendicular to the first direction.
[0015] Through the above solution, in the first direction, at both ends of the first rod of the second part, they can approach each other towards the first rod of the first part to shorten the size of the first bracket, or, at both ends of the first rod of the second part, they can move away from each other to increase the size of the first bracket. Similarly, in the first direction, at both ends of the second rod of the second part, they can approach each other towards the second rod of the first part to shorten the size of the second bracket, or, at both ends of the second rod of the second part, they can move away from each other to increase the size of the second bracket.
[0016] In some possible designs, when two adjacent first rods are slidably connected and two adjacent second rods are slidably connected: one of the two adjacent first rods is provided with a first chute, and the other is provided with a first slider adapted to the first chute, and the two adjacent first rods are slidably connected through the first chute and the first slider. One of the two adjacent second rods is provided with a second chute, and the other is provided with a second slider adapted to the second chute, and the two adjacent second rods are slidably connected through the second chute and the second slider.
[0017] Through the above solution, sliding at least one of the two adjacent first rods can change the position of the first slider in the first chute, and further change the area of the sliding connection region of the two adjacent first rods. Similarly, sliding at least one of the two adjacent second rods can change the position of the second slider in the second chute, and further change the area of the sliding connection region of the two adjacent second rods.
[0018] In some possible designs, the first bracket further includes a first connecting rod, and the first connecting rod is connected to the first rod; the second bracket further includes a second connecting rod, and the second connecting rod is connected to the second rod; both ends of the second bracket are correspondingly connected to both ends of the first bracket through the second connecting rod and the first connecting rod.
[0019] Through the above solution, the first bracket and the second bracket can be limited by each other through the first connecting rod and the second connecting rod, so as to prevent the two from being misaligned with each other, resulting in a change in the size of the tab bracket and affecting the support of the tab by the tab bracket.
[0020] In some possible designs, the first connecting rod includes a plurality of third rods, and in the second direction, the plurality of third rods are connected in sequence and can move relative to each other to change the size of the first bracket in the second direction. The second connecting rod includes a plurality of fourth rods, and in the second direction, the plurality of fourth rods are connected in sequence and can move relative to each other, so that the size of the second bracket in the second direction can change with the size of the first bracket. Wherein, the second direction is perpendicular to the first direction.
[0021] With the above solution, moving one or more third rods can change the size of the first bracket in the second direction, and moving one or more fourth rods can change the size of the second bracket in the second direction, so that the size of the tab bracket in the second direction can also be changed, facilitating the tab bracket to be applicable to more specifications of battery cells.
[0022] In some possible designs, the tab bracket further includes a matching positioning hole and a positioning protrusion. The positioning hole is provided on one of two adjacent first rods, and the positioning protrusion is provided on the other. The positioning hole is provided on one of two adjacent second rods, and the positioning protrusion is provided on the other. The positioning hole is provided on one of two adjacent third rods, and the positioning protrusion is provided on the other. The positioning hole is provided on one of two adjacent fourth rods, and the positioning protrusion is provided on the other.
[0023] With the above solution, after at least one of the plurality of first rods moves a predetermined distance, the positioning protrusion can be embedded in the positioning hole to limit the position of the moving first rod and prevent the moving first rod from moving again under the influence of an external force. Similarly, the positioning hole and the positioning protrusion can also limit the positions of the moving second rod, the moving third rod, and the moving fourth rod. That is to say, when the tab bracket is in a certain size specification, the positioning hole and the positioning protrusion can keep the tab bracket in that size specification, preventing the tab bracket from changing its size due to external factors, which is beneficial to ensuring the support of the tab bracket for the tab.
[0024] In a second aspect, an embodiment of the present application further provides a battery cell. The battery cell includes an electrode assembly, an insulating film, and the tab bracket of the first aspect. The electrode assembly includes a wound core and tabs, and the tabs are connected to the end sides of the wound core. The insulating film wraps around the outer periphery of the electrode assembly, and an opening is provided on the side of the insulating film close to the tabs, through which the tabs can pass through. The part of the tab passing through the opening can be supported by the first bracket and the second bracket.
[0025] In a third aspect, an embodiment of the present application further provides a battery. The battery includes one or more battery cells of the second aspect.
[0026] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to be able to understand the technical means of the embodiments of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features, and advantages of the embodiments of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. Description of the Drawings
[0027] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0028] Figure 1 Schematic diagram of a vehicle in some embodiments of the present application.
[0029] Figure 2 Schematic diagram of a battery in some embodiments of the present application.
[0030] Figure 3 Schematic diagram of a battery cell in some embodiments of the present application.
[0031] Figure 4 Exploded view of an ear bracket in some embodiments of the present application.
[0032] Figure 5 First socketing schematic diagram of multiple first rods in some embodiments of the present application.
[0033] Figure 6 Second socketing schematic diagram of multiple first rods in some embodiments of the present application.
[0034] Figure 7 Schematic diagram of the first sliding connection between two adjacent first rods in some embodiments of the present application.
[0035] Figure 8 Schematic diagram of the second sliding connection between two adjacent first rods in some embodiments of the present application.
[0036] Explanation of reference numerals:
[0037] Vehicle 1; Battery 11; Controller 12; Motor 13; Battery cell 111; Box 112; Electrode assembly 1111; Ear bracket 1112; Housing 1113; End cover assembly 1114; First bracket Z1; First rod G1; First connecting rod L1; Third rod G3; Second bracket Z2; Second rod G2; Second connecting rod L2; Fourth rod G4; First slider HK; First chute HC; First card slot KC; Positioning hole K; Positioning protrusion T;
[0038] First direction X; Second direction Y. Detailed implementation manners
[0039] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application 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 making creative efforts shall fall within the protection scope of this application.
[0040] Unless otherwise defined, all technical and scientific terms used herein 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 description and claims of this application and the drawings are intended to cover non-exclusive inclusion.
[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase "embodiments" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0042] The orientation terms appearing in the following description are all the directions shown in the drawings and do not limit the specific structure of this application. For example, in the description of this application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. 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 this 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, and thus cannot be construed as a limitation of this application.
[0043] In addition, expressions indicating directions such as the X direction and the Y direction for explaining the operations and structures of the components in this embodiment are not absolute but relative. Although these indications are appropriate when the components are in the positions shown in the drawings, when these positions change, these directions should have different interpretations to correspond to the changes.
[0044] In addition, in the description of this application, the terms "first", "second", etc. in the specification and claims of this application or in the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.
[0045] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of a mechanical structure may refer to a physical connection. For example, a physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a screw, bolt, or other fixing member; a physical connection may also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection may also be an integral connection, such as a welded, bonded, or integrally formed connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0046] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand for them is also constantly increasing.
[0047] The inventors noticed that in conventional power batteries, for a blade battery cell, especially a battery cell with relatively long positive and negative electrode tabs, due to the long tabs, the tabs are prone to bending and deformation due to accidental or vibration factors, and insert into the inside of the battery cell, resulting in an internal short circuit of the battery cell and posing a large safety risk.
[0048] The solutions to the above problems in the related art are: adding a tab support to support the tabs to prevent the tabs from bending and deforming due to accidental or vibration factors. However, the specifications of the tab supports in the related art are constant. However, the specifications of the battery cells are not single. Therefore, the tab supports with constant specifications cannot be used in battery cells of different specifications, and the versatility of the tab supports is low.
[0049] Based on the above considerations, in order to solve the problem of low versatility of the existing tab supports, the inventors conducted in-depth research and designed a tab support whose size can be changed so as to be applied to battery cells of different specifications.
[0050] The battery cell to which the tab holder disclosed in the embodiments of the present application is applied can be, but is not limited to, used in power-consuming devices such as vehicles, ships, or aircraft as a power source. The power-consuming device can be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, and so on. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.
[0051] For the convenience of description in the following embodiments, a power-consuming device of an embodiment of the present application is taken as an example of a vehicle 1 for illustration.
[0052] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle 1 provided by some embodiments of the present application. The vehicle 1 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc. A battery 11 is arranged inside the vehicle 1, and the battery 11 can be arranged at the bottom, head, or tail of the vehicle 1. The battery 11 can be used for power supply of the vehicle 1. For example, the battery 11 can be used as an operating power source of the vehicle 1 and can also be used as a driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1. The vehicle 1 can also include a controller 12 and a motor 13. The controller 12 is used to control the battery 11 to supply power to the motor 13. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1.
[0053] Please refer to Figure 2 , Figure 2 which is an exploded view of the battery 11 provided by some embodiments of the present application. The battery 11 includes a battery cell 111 and a box body 112, and the battery cell 111 is accommodated in the box body 112. Among them, the box body 112 is used to provide an accommodation space for the battery cell 111, and the box body 112 can adopt various structures, such as a cuboid structure or a cube structure, etc. The battery cells 111 can be multiple, and the multiple battery cells 111 can be connected in series, parallel, or in a mixed connection. The mixed connection means that there are both series and parallel connections among the multiple battery cells 111. Each battery cell 111 can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto.
[0054] Please refer to Figure 3 , Figure 3 which is a schematic diagram of the battery cell 111 provided by some embodiments of the present application. The battery cell 111 refers to the smallest unit that makes up the battery 11. The battery cell 111 includes an electrode assembly 1111, a tab holder 1112, a housing 1113, and an end cap assembly 1114.
[0055] The housing 1113 is a component used to cooperate with the end cap assembly 1114 to form the internal environment of the battery cell 111. Among them, the formed internal environment can be used to accommodate the electrode assembly 1111, the electrolyte, and other components. The housing 1113 and the end cap assembly 1114 can be independent components. An opening can be provided on the housing 1113, and the end cap assembly 1114 is covered at the opening to form the internal environment of the battery cell 111. Without limitation, the end cap assembly 1114 and the housing 1113 can also be integrated. Specifically, the end cap assembly 1114 and the housing 1113 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 1113, the end cap assembly 1114 is then covered on the housing 1113.
[0056] The end cap assembly 1114 refers to a component that covers the opening of the housing 1113 to isolate the internal environment of the battery cell 111 from the external environment. Without limitation, the shape of the end cap assembly 1114 can be adapted to the shape of the housing 1113 to cooperate with the housing 1113. Optionally, the end cap assembly 1114 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap assembly 1114 is not easily deformed when being squeezed and collided, enabling the battery cell 111 to have higher structural strength and improved safety performance.
[0057] The electrode assembly 1111 is a component in the battery cell 111 where electrochemical reactions occur. The housing 1113 can contain one or more electrode assemblies 1111. The electrode assembly 1111 is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and usually a separator is provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active substances constitute the main body of the electrode assembly 1111, and the parts of the positive electrode sheet and the negative electrode sheet without active substances respectively constitute the electrode tabs. The positive electrode tab and the negative electrode tab can be located at both ends of the main body respectively. During the charging and discharging process of the battery, the positive electrode active substance and the negative electrode active substance react with the electrolyte, and the electrode tabs are connected to the electrode terminals to form a current loop.
[0058] Please refer to Figure 4 , Figure 4 is an exploded view of the electrode tab bracket 1112 provided in some embodiments of the present application. The electrode tab bracket 1112 includes a first bracket Z1 and a second bracket Z2. Among them, the first bracket Z1 includes a plurality of first rods G1. In the first direction X, the plurality of first rods G1 are connected in sequence and can move relative to each other to change the size of the first bracket Z1 in the first direction X. The two ends of the second bracket Z2 are correspondingly connected to the two ends of the first bracket Z1. The second bracket Z2 includes a plurality of second rods G2. In the first direction X, the plurality of second rods G2 are connected in sequence and can move relative to each other, so that the size of the second bracket Z2 in the first direction X can change with the size of the first bracket Z1.
[0059] It should be noted that: Please continue to refer to Figure 3 , since the blade battery cell 111 is in a cuboid shape and the tab is located at one end of the battery cell 111 along the length direction, therefore, the tab holder 1112 needs to be arranged at one end of the battery cell 111 along the length direction. On this basis, in this embodiment, the first direction X can be the same as the width direction of the battery cell 111 or the same as the thickness direction of the battery cell 111.
[0060] Based on this, when the tab holder 1112 needs to be applied to multiple battery cells 111 with different widths or thicknesses, one or more first rods G1 can be moved to change the size of the first bracket Z1 in the first direction X, so that the size of the first bracket Z1 in the first direction X can adapt to the widths or thicknesses of the multiple battery cells 111. And one or more second rods G2 are moved to change the size of the second bracket Z2 in the first direction X, so that the size of the second bracket Z2 in the first direction X can be correspondingly the same as the size of the first bracket Z1 in the first direction X, thereby enabling the tab holder 1112 to meet the application requirements of the multiple battery cells 111.
[0061] For example, when the tab holder 1112 needs to be applied to a battery cell 111 with a smaller width, but the current tab holder 1112 has a larger size in the width direction of the battery cell 111, one or more first rods G1 can be moved to reduce the size of the first bracket Z1 in the width direction of the battery cell 111, so that the size of the first bracket Z1 in the width direction of the battery can adapt to the width of the battery cell 111. And one or more second rods G2 are moved so that the size of the second bracket Z2 in the width direction of the battery cell 111 is the same as the size of the first bracket Z1 in the width direction of the battery cell 111. In this way, the size of the tab holder 1112 in the width direction of the battery cell 111 can adapt to the width of the battery cell 111 to better support the tab at the end side of the battery cell 111.
[0062] Also for example, when the tab holder 1112 needs to be applied to a battery cell 111 with a smaller thickness, but the current tab holder 1112 has a smaller size in the thickness direction of the battery cell 111, one or more first rods G1 can be moved to increase the size of the first bracket Z1 in the thickness direction of the battery cell 111, so that the size of the first bracket Z1 in the thickness direction of the battery can adapt to the thickness of the battery cell 111. And one or more second rods G2 are moved so that the size of the second bracket Z2 in the thickness direction of the battery cell 111 is the same as the size of the first bracket Z1 in the thickness direction of the battery cell 111. In this way, the size of the tab holder 1112 in the thickness direction of the battery cell 111 can adapt to the thickness of the battery cell 111 to better support the tab at the end side of the battery cell 111.
[0063] Based on the above statements, the specific steps for the first bracket Z1 and the second bracket Z2 to support the tab in the battery cell 111 are as follows: The two ends of the first bracket Z1 are correspondingly connected to the two ends of the second bracket Z2, so that an ear passage is formed between the first bracket Z1 and the second bracket Z2 (multiple first rods G1 and multiple second rods G2); the end of the tab away from the electrode tab passes through the ear passage, and the opposite faces of the first bracket Z1 and the second bracket Z2 clamp the tab, and the faces of the first bracket Z1 and the second bracket Z2 facing away from the electrode tab support the tab. In this way, when the tab is affected by factors such as accidents or vibrations, the faces of the first bracket Z1 and the second bracket Z2 facing away from the electrode tab can prevent the tab from being bent and inserted into the winding core, causing an internal short circuit in the battery cell 111.
[0064] Among them, both the first bracket Z1 and the second bracket Z2 are made of insulating materials. In this way, the tab bracket 1112 can insulate the tab from other components (for example, the housing 120) to avoid short circuits.
[0065] In the above embodiments, the multiple first rods G1 and the multiple second rods G2 can both be set in various structural forms, and based on the different setting forms of the multiple first rods G1 and the multiple second rods G2, the relative movement modes of the multiple first rods G1 are different, and the relative movement modes of the multiple second rods G2 are different. For the convenience of understanding, the following will be exemplarily described with reference to the accompanying drawings.
[0066] In some examples, please refer to Figure 5 and Figure 6 , the multiple first rods G1 are configured as hollow tubular structures, and two adjacent first rods G1 are sleeved. The multiple second rods G2 are also configured as hollow tubular structures, and two adjacent second rods G2 are sleeved (the same as Figure 5 and Figure 6 , so the drawings are not shown).
[0067] In this example, moving at least one of two adjacent first rods G1 can change the area of the sleeved area of the two adjacent first rods G1, and further change the total dimension of the multiple first rods G1 in the first direction X, realizing the change of the dimension of the first bracket Z1 in the first direction X. Similarly, moving at least one of two adjacent second rods G2 can change the area of the sleeved area of the two adjacent second rods G2, and further change the total dimension of the multiple second rods G2 in the first direction X, realizing the change of the dimension of the second bracket Z2 in the first direction X.
[0068] Among them, the multiple first rods G1 and the multiple second rods G2 can both be configured as hollow cylindrical tubes or hollow prismatic tubes, etc., and the embodiments of the present application do not make special limitations in this regard. It should be noted that when the multiple first rods G1 and the multiple second rods G2 are both configured as hollow prismatic tubes, arc chamfers can be provided at the edges of the prismatic tubes. In this way, during the process of the tab holder 1112 supporting the tab, the edge parts can contact the tab through the arc surface and will not scratch or damage the tab.
[0069] In the above example, when two adjacent first rods G1 are sleeved and two adjacent second rods G2 are sleeved, there can be various specific sleeving methods. For the convenience of understanding, an exemplary description will be given below with reference to the accompanying drawings.
[0070] In one sleeving method, please continue to refer to Figure 5 , Figure 5 which is the first sleeving schematic diagram of the multiple first rods G1 in some embodiments of the present application. The sizes of each first rod G1 in the second direction Y are different, and the multiple first rods G1 are sleeved in sequence as the size increases or decreases. The sizes of each second rod G2 in the second direction Y are different, and the multiple second rods G2 are sleeved in sequence as the size increases or decreases (the same as the Figure 5 way, so it is not shown in the figure). Among them, the second direction Y is perpendicular to the first direction X.
[0071] In this way, "multiple" can refer to two or more. In the first direction X, the multiple first rods G1 and the multiple second rods G2 can both retract or extend in sequence according to the increasing or decreasing sizes in the second direction Y. Compared with other sleeving methods, in this sleeving method, when the multiple first rods G1 and the multiple second rods G2 can both retract in sequence according to the increasing or decreasing sizes in the second direction Y, in the first direction X, the sizes of the first bracket Z1 and the second bracket Z2 can reach the minimum, the size range of the first bracket Z1 and the second bracket Z2 is the largest, and the versatility of the tab holder 1112 is the highest.
[0072] In another sleeving method, please continue to refer to Figure 6 , Figure 6 which is the second sleeving schematic diagram of the multiple first rods G1 in some embodiments of the present application. The multiple first rods G1 include a first part and a second part. In the second direction Y, the size of the first part of the first rod G1 is different from the size of the second part of the first rod G1, and the second part of the first rod G1 is sleeved at both ends of the first part of the first rod G1. The multiple second rods G2 all include a first part and a second part. The size of the first part of the second rod G2 is different from the size of the second part of the second rod G2, and the second part of the second rod G2 is sleeved at both ends of the first part of the second rod G2 (the same as the Figure 6In the same manner as described above (not shown in the figures). Herein, the second direction Y is perpendicular to the first direction X.
[0073] In this embodiment, "a plurality" may refer to three or more. In the first direction X, at both ends of the first rod G1 of the first part, the second part of the first rod G1 can move closer to each other to reduce the size of the first bracket Z1, or at both ends of the first rod G1 of the first part, the second part of the first rod G1 can move away from each other to increase the size of the first bracket Z1. Similarly, in the first direction X, at both ends of the second rod G2 of the first part, the second part of the second rod G2 can move closer to each other to reduce the size of the second bracket Z2, or at both ends of the second rod G2 of the first part, the second part of the second rod G2 can move away from each other to increase the size of the second bracket Z2.
[0074] Exemplarily, as Figure 6 , when there are three first rods G1, the first part of the first rod G1 can refer to the middle one of the three nested first rods G1, and the second part of the first rod G1 can refer to the two first rods G1 at both ends of the middle first rod G1. Based on this, in the first direction X, the two first rods G1 at both ends of the middle first rod G1 can move closer to each other at both ends of the middle first rod G1 to reduce the size of the first bracket Z1, or the two first rods G1 at both ends of the middle first rod G1 can move away from each other at both ends of the middle first rod G1 to increase the size of the first bracket Z1. Similarly, in the first direction X, the two second rods G2 at both ends of the middle second rod G2 can move closer to each other at both ends of the middle second rod G2 to reduce the size of the second bracket Z2, or the two second rods G2 at both ends of the middle second rod G2 can move away from each other at both ends of the middle second rod G2 to increase the size of the second bracket Z2.
[0075] It should be noted that in the above two nested manners, the second direction Y being perpendicular to the first direction X can be understood in the following multiple situations: First, when the first direction X is the same as the width direction of the battery cell 111, the second direction Y is a plurality of directions perpendicular to the width direction of the battery cell 111; second, when the first direction X is the same as the thickness direction of the battery cell 111, the second direction Y is a plurality of directions perpendicular to the thickness direction of the battery cell 111.
[0076] In addition, in the above two nested manners, the sizes of the plurality of first rods G1 and the plurality of second rods G2 in the second direction Y can both be set to be relatively small to avoid affecting the assembly of other components by the tab holder 1112. Exemplarily, in the second direction Y, the sizes of the plurality of first rods G1 and the plurality of second rods G2 can both be set to be about 2 millimeters.
[0077] In some other examples, please refer toFigure 7 and Figure 8 ,a plurality of first rods G1 are configured as strip structures, and two adjacent first rods G1 are slidably connected. A plurality of second rods G2 are configured as strip structures, and two adjacent second rods G2 are slidably connected (the same as Figure 7 and Figure 8 , so it is not shown in the drawings).
[0078] In this example, sliding at least one of two adjacent first rods G1 can change the area of the sliding connection region between two adjacent first rods G1, and further change the total dimension of the plurality of first rods G1 in the first direction X, so as to realize the change of the dimension of the first bracket Z1 in the first direction X. Similarly, sliding at least one of two adjacent second rods G2 can change the area of the sliding connection region between two adjacent second rods G2, and further change the total dimension of the plurality of second rods G2 in the first direction X, so as to realize the change of the dimension of the second bracket Z2 in the first direction X.
[0079] Among them, the plurality of first rods G1 and the plurality of second rods G2 can both be configured as cylindrical bars or polygonal prism bars, etc. It should be noted that when the plurality of first rods G1 and the plurality of second rods G2 are both configured as polygonal prism bars, arc chamfers can be provided at the edges of the polygonal prism bars. In this way, during the process of the tab holder 1112 supporting the tab, the edge part can contact the tab through an arc and will not scratch or damage the tab.
[0080] In the above example, when two adjacent first rods G1 are slidably connected and two adjacent second rods G2 are slidably connected, there can be various specific connection methods. For the convenience of understanding, an exemplary description will be given below with reference to the drawings.
[0081] In one connection method, please continue to refer to Figure 7 , Figure 7 is a schematic diagram of the first sliding connection between two adjacent first rods G1 in some embodiments of the present application. One of two adjacent first rods G1 is provided with a first sliding groove HC, and the other is provided with a first sliding block HK adapted to the first sliding groove HC. Two adjacent first rods G1 are slidably connected through the first sliding groove HC and the first sliding block HK. One of two adjacent second rods G2 is provided with a second sliding groove, and the other is provided with a second sliding block adapted to the second sliding groove. Two adjacent second rods G2 are slidably connected through the second sliding groove and the second sliding block (the same as Figure 7 , so it is not shown in the figure).
[0082] In this connection method, sliding at least one of two adjacent first rods G1 can change the position of the first slider HK in the first chute HC, and further change the area of the sliding connection region of two adjacent first rods G1. Similarly, sliding at least one of two adjacent second rods G2 can change the position of the second slider in the second chute, and further change the area of the sliding connection region of two adjacent second rods G2.
[0083] Among them, both the first slider HK and the second slider can be set as multi-prismatic blocks, cylindrical blocks, spherical blocks, etc. Correspondingly, both the first chute HC and the second chute can be correspondingly set as C-shaped chutes or U-shaped chutes adapted to multi-prismatic blocks, cylindrical blocks, and spherical blocks. The embodiments of the present application do not specifically limit the forms of the first slider HK and the first chute HC, the second slider and the second chute.
[0084] In another connection method, please continue to refer to Figure 8 , Figure 8 which is a schematic diagram of the second sliding connection of two adjacent first rods G1 in some embodiments of the present application. One of two adjacent first rods G1 is provided with a first card slot KC adapted to the other, and a part of the other is embedded in the first card slot KC. One of two adjacent second rods G2 is provided with a second card slot adapted to the other, and a part of the other is embedded in the second card slot (the same as Figure 8 the way, so it is not shown in the figure).
[0085] In this connection method, sliding at least one of two adjacent first rods G1 can change the position of the first rod G1 in the first sliding card slot, and further change the area of the sliding connection region of two adjacent first rods G1. Similarly, sliding at least one of two adjacent second rods G2 can change the position of the second rod G2 in the second sliding card slot, and further change the area of the sliding connection region of two adjacent second rods G2.
[0086] Among them, based on the shapes of the first rod G1 and the second rod G2, both the first card slot KC and the second card slot can be set as C-shaped chutes or U-shaped chutes.
[0087] On the basis of the above embodiments, please continue to refer to Figure 4 , the first bracket Z1 further includes a first connecting rod L1, and the first connecting rod L1 is connected to the first rod G1; the second bracket Z2 further includes a second connecting rod L2, and the second connecting rod L2 is connected to the second rod G2; both ends of the second bracket Z2 are correspondingly connected to both ends of the first bracket Z1 through the second connecting rod L2 and the first connecting rod L1.
[0088] In this embodiment, the first connecting rod L1 can be connected to the second connecting rod L2 to realize the connection between the first bracket Z1 and the second bracket Z2. After the first bracket Z1 and the second bracket Z2 are connected, the first bracket Z1 and the second bracket Z2 can be mutually limited by the first connecting rod L1 and the second connecting rod L2 to prevent the two from being misaligned with each other, resulting in a change in the size of the tab holder 1112 and affecting the support of the tab by the tab holder 1112.
[0089] Among them, the forms of the first connecting rod L1 and the second connecting rod L2 can be various. For the convenience of understanding, the following will be described in detail with reference to the accompanying drawings.
[0090] In one form, both the first connecting rod L1 and the second connecting rod L2 can be set as rods with a constant size in the second direction Y (not shown in the figure). One of the first connecting rod L1 and the second connecting rod L2 can be provided with a buckle, and the other can be provided with a buckle groove adapted to the buckle. The first connecting rod L1 can be connected to the second connecting rod L2 through the buckle and the buckle groove.
[0091] In this form, the first connecting rod L1 and the second connecting rod L2 can be mutually limited by the buckle and the buckle groove to prevent the first bracket Z1 and the second bracket Z2 from being misaligned with each other, thereby avoiding a change in the size of the tab holder 1112 and affecting the support of the tab by the tab holder 1112.
[0092] In another form, as Figure 4 shown, the first connecting rod L1 includes a plurality of third rods G3. In the second direction Y, the plurality of third rods G3 are connected in sequence and can move relative to each other to change the size of the first bracket Z1 in the second direction Y. The second connecting rod L2 includes a plurality of fourth rods G4. In the second direction Y, the plurality of fourth rods G4 are connected in sequence and can move relative to each other so that the size of the second bracket Z2 in the second direction Y can change with the size of the first bracket Z1. Among them, the second direction Y is perpendicular to the first direction X.
[0093] It should be noted that: based on the foregoing description, the fact that the second direction Y is perpendicular to the first direction X can be understood as the following various situations: First, when the first direction X is the same as the width direction of the battery cell 111, the second direction Y is a plurality of directions perpendicular to the width direction of the battery cell 111; Second, when the first direction X is the same as the thickness direction of the battery cell 111, the second direction Y is a plurality of directions perpendicular to the thickness direction of the battery cell 111.
[0094] Based on this, for this embodiment, when the first direction X is the same as the width direction of the battery cell 111, the second direction Y can be the same as the thickness direction of the battery cell 111; when the first direction X is the same as the thickness direction of the battery cell 111, the second direction Y is the same as the width direction of the battery cell 111.
[0095] Therefore, in this form, moving one or more third rods G3 can change the dimension of the first bracket Z1 in the second direction Y, and moving one or more fourth rods G4 can change the dimension of the second bracket Z2 in the second direction Y, so that the dimension of the tab bracket 1112 in the second direction Y can also be changed, facilitating the tab bracket 1112 to be applicable to more specifications of battery cells 111.
[0096] Combined with the foregoing embodiments, it can be seen that the dimensions of the first bracket Z1 in the first direction X and the second direction Y can both be changed, and the dimensions of the second bracket Z2 in the first direction X and the second direction Y can both be changed. That is to say, the dimensions of the tab bracket 1112 in the width direction and the thickness direction of the battery cell 111 can both be changed, which is more conducive to improving the versatility of the tab bracket 1112.
[0097] Wherein, the connection modes of the multiple third rods G3 and the multiple fourth rods G4 can both be the same as the connection mode of the multiple first rods G1, which will not be elaborated here.
[0098] In some embodiments, please continue to refer to Figures 5 to 8 , the tab bracket 1112 further includes a matching positioning hole K and a positioning protrusion T. The positioning hole K is provided on one of the adjacent two first rods G1, and the positioning protrusion T is provided on the other. The positioning hole K is provided on one of the adjacent two second rods G2, and the positioning protrusion T is provided on the other. The positioning hole K is provided on one of the adjacent two third rods G3, and the positioning protrusion T is provided on the other. The positioning hole K is provided on one of the adjacent two fourth rods G4, and the positioning protrusion T is provided on the other.
[0099] In this embodiment, after at least one of the multiple first rods G1 moves a predetermined distance, the positioning protrusion T can be embedded in the positioning hole K to limit the position of the moved first rod G1 and prevent the moved first rod G1 from moving again under the influence of external force. Similarly, the positioning hole K and the positioning protrusion T can also limit the positions of the moved second rod G2, the moved third rod G3, and the moved fourth rod G4. That is to say, when the tab bracket 1112 is in a certain dimension specification, the positioning hole K and the positioning protrusion T can keep the tab bracket 1112 in this dimension specification and prevent the tab bracket 1112 from changing its dimensions due to external factors, which is beneficial to ensuring the support of the tab bracket 1112 for the tabs.
[0100] It should be noted that the positioning holes K and the positioning protrusions T can be concealed. For example, when two adjacent first rods G1 are sleeved, the positioning protrusion T can be arranged on the inner wall of the hollow tubular structure, and the positioning hole K can be arranged on the peripheral wall of the hollow tubular structure. The first rod G1 provided with the positioning hole K can be sleeved inside the first rod G1 provided with the positioning protrusion T. In this way, when the first rod G1 provided with the positioning hole K is removed from the first rod G1 provided with the positioning protrusion T, no indentation will be caused on the tab, which is beneficial to reducing the damage of the tab support 1112 to the tab.
[0101] Among them, multiple positioning holes K can be provided, and the multiple positioning holes K can be arranged in the first direction X or the second direction Y according to the specific application position. The positioning protrusion T can be embedded in different positioning holes K so that the tab support 1112 can be maintained in multiple specification sizes.
[0102] The embodiment of the present application also provides a battery cell. This battery cell is the same as Figure 3 the battery cell 111 shown. This battery cell further includes an insulating film, which is wrapped around the outer periphery of the electrode assembly, and an opening is provided on the side of the insulating film close to the tab, and the tab can pass through the opening. The part of the tab passing through the opening can be supported by the first bracket Z1 and the second bracket Z2.
[0103] In this embodiment, since the tab support 1112 has the above effects, the tab support 1112 can be adapted to different specifications of battery cells, support the tabs in different specifications of battery cells, so as to prevent the tabs from being inserted into the winding core under the influence of the external environment, resulting in an internal short circuit of the battery cell.
[0104] Among them, the shape, structure and function of the insulating film are the same as those in the prior art and will not be elaborated here.
[0105] The first bracket Z1 and the second bracket Z2 can clamp on both sides of the opening part of the insulating film, and clamp and support the tab at the opening part and the tab passing through the opening, so as to prevent the tab from being inserted into the winding core under the influence of the external environment.
[0106] The embodiment of the present application also provides a battery. This battery is the same as Figure 2 the battery 11 shown, and this battery includes one or more of the aforementioned battery cells 111.
[0107] Since the tab support 1112 and its beneficial effects have been elaborated in detail in the foregoing embodiments, the tab support 1112 can be adapted to the battery. Among them, the battery can be of multiple specifications, and the specifications of the battery are different based on the different specifications of the internal battery cells.
[0108] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.
Claims
1. A tab support for supporting a tab in a battery cell, characterized in that: The pole lug support comprises: A first bracket comprises a plurality of first rods, wherein the plurality of first rods are sequentially connected and relatively movable in a first direction to change a size of the first bracket in the first direction; A second bracket, two ends of the second bracket are correspondingly connected to two ends of the first bracket; the second bracket includes a plurality of second rods, and in the first direction, the plurality of second rods are sequentially connected and can move relatively, so that the size of the second bracket in the first direction can change with the size of the first bracket.
2. The pole lug support according to claim 1, characterized in that: The plurality of first rods and the plurality of second rods are all configured as hollow tubular structures, two adjacent first rods are sleeved together, and two adjacent second rods are sleeved together; or, The plurality of first rods and the plurality of second rods are all configured as a strip structure, two adjacent first rods are slidably connected, and two adjacent second rods are slidably connected.
3. The pole lug support according to claim 2, characterized in that: When two adjacent first rods are connected in sleeves, and two adjacent second rods are connected in sleeves: In the second direction, the size of each first rod in the second direction is different, and multiple first rods are sequentially socketed with increasing or decreasing sizes; the size of each second rod in the second direction is different, and multiple second rods are sequentially socketed with increasing or decreasing sizes; wherein, the second direction is perpendicular to the first direction.
4. The pole lug support according to claim 2, characterized in that: When two adjacent first rods are connected in sleeves, and two adjacent second rods are connected in sleeves: Multiple first rods and multiple second rods all include a first part and a second part. In the second direction, the size of the first rod of the first part is different from the size of the first rod of the second part. The first rod of the second part is sleeved on both ends of the first rod of the first part. The size of the second rod of the first part is different from the size of the second rod of the second part. The second rod of the second part is sleeved on both ends of the second rod of the first part. The second direction is perpendicular to the first direction.
5. The pole lug support according to claim 2, characterized in that: When two adjacent first rods are slidably connected, and two adjacent second rods are slidably connected: One of two adjacent first rods is provided with a first slide groove, and the other is provided with a first slider adapted to the first slide groove, and the two adjacent first rods are slidably connected via the first slide groove and the first slider; one of two adjacent second rods is provided with a second slide groove, and the other is provided with a second slider adapted to the second slide groove, and the two adjacent second rods are slidably connected via the second slide groove and the second slider.
6. The pole lug support according to claim 2, characterized in that: The first bracket further includes a first connecting rod connected to the first rod; the second bracket further includes a second connecting rod connected to the second rod; the two ends of the second bracket are correspondingly connected to the two ends of the first bracket through the second connecting rod and the first connecting rod.
7. The pole lug support according to claim 6, characterized in that: The first connecting rod comprises a plurality of third rods, and in the second direction, the plurality of third rods are sequentially connected and can move relatively to each other, so as to change the size of the first bracket in the second direction; The second connecting rod comprises a plurality of fourth rods, and in the second direction, the plurality of fourth rods are sequentially connected and relatively movable, so that the size of the second bracket in the second direction can be changed along with the size of the first bracket; The second direction is perpendicular to the first direction.
8. The pole lug support according to claim 7, characterized in that: Also includes matching positioning holes and positioning protrusions; The positioning hole is provided on one of the two adjacent first rods, and the positioning protrusion is provided on the other one; the positioning hole is provided on one of the two adjacent second rods, and the positioning protrusion is provided on the other one; The positioning hole is provided in one of the two adjacent third rods, and the positioning protrusion is provided in the other one; the positioning hole is provided in one of the two adjacent fourth rods, and the positioning protrusion is provided in the other one.
9. A battery cell, characterized in that: include: An electrode assembly, comprising a winding core and a pole tab, wherein the pole tab is connected to an end side of the winding core; An insulating film is wrapped around the outer periphery of the electrode assembly, and an opening is provided on a side of the insulating film close to the electrode tab, and the electrode tab can pass through the opening; as well as According to the pole tab support as described in any one of claims 1 to 8, the portion of the pole tab passing through the opening can be supported by the first bracket and the second bracket.
10. A battery, characterized in that: Comprising one or more battery cells as claimed in claim 9.