Pole group end plate and battery

Abstract

The utility model provides a pole group end plate and a battery, the structure of the pole group end plate comprises an end plate main body, and the end plate main body is arranged in a shell of the battery; the elastic buckling part is arranged at the end part of the end plate main body, and the end plate main body is fixed on a shell of the battery through the elastic buckling part. The pole group end plate and the battery can solve the problem that the positioning mode of the existing pole group end plate is relatively low in strength.

Description

Technical Field

[0001] The present application relates to the technical field of blade batteries, and in particular to a pole group end plate and a battery. Background Art

[0002] Lithium-ion batteries have the characteristics of high energy density, long service life, high rated voltage, low self-discharge and high charging efficiency. They are now widely used in various fields such as power, energy storage, smart home, etc.

[0003] The structure of lithium-ion battery includes cover plate, shell, pole group end plate, side plate, bare cell insulation sheet, pole group, etc. After the cover plate and shell are welded, a closed space with certain mechanical strength can be formed to protect the pole group. The pole group end plate is arranged inside the shell. The pole group end plate is an important part of the battery structure, which can protect the pole ear of the battery.

[0004] The existing terminal plate of the pole group is mainly positioned in the shell by hot melting with the Mylar film, and its fixing strength is low. When subjected to severe vibration, the terminal plate of the pole group will shake inside the battery. There is a risk of tearing the pole ear, and the bending protection of the pole ear is limited, resulting in a high probability of thermal runaway and other risks in the product. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide a pole group end plate and a battery, so as to solve the problem of low strength of the existing pole group end plate positioning method.

[0006] According to the first aspect of the utility model, a pole group end plate is provided, wherein the pole group end plate comprises: an end plate body, which is arranged in the shell of the battery; and an elastic snap portion, which is arranged at the end of the end plate body, and the end plate body is fixed to the shell of the battery through the elastic snap portion.

[0007] Preferably, the elastic buckle parts are arranged at two ends of the end plate body in the length direction, and the elastic buckle parts abut against the inner wall of the shell.

[0008] Preferably, the elastic snap-on portion includes: an elastic rib plate, the bottom of which is connected to the bottom of the end plate body, the elastic rib plate being formed with a guide surface and a mating surface, the guide surface being inclined from bottom to top in a direction away from the end plate body, the mating surface being arranged at the upper part of the guide surface, the mating surface being used to abut against the inner wall of the shell; and a connecting rib plate, which is arranged between the elastic rib plate and the end of the end plate body, the two ends of the connecting rib plate respectively connecting the elastic rib plate and the end of the end plate body.

[0009] Preferably, at least a portion of the end plate body is formed as a groove, and a partition is further provided in the end plate body, wherein the partition divides the end plate body into a first groove portion and a second groove portion.

[0010] Preferably, a strip-shaped opening for allowing a tab of the battery to pass through is formed at the bottom of the first groove portion.

[0011] Preferably, a first bottom plate is further provided at the bottom of the first groove portion, and the first bottom plate is inclined downward from the middle portion in the width direction of the end plate body to the side edge in the width direction.

[0012] Preferably, the end of the first groove portion connected to the elastic buckle portion is provided with a first vent, and the first vent is provided at an upper edge of the first groove portion.

[0013] Preferably, a second bottom plate is disposed at the bottom of the second groove portion, a plurality of through holes are formed on the second bottom plate, and the position of the second groove portion corresponds to the position of the explosion-proof valve of the battery.

[0014] Preferably, a second vent and a third vent are respectively provided at both sides of the second groove portion in the width direction, and the second vent and the third vent are provided at an upper edge of the second groove portion.

[0015] According to a second aspect of the present invention, a battery is provided, wherein the battery comprises a housing and the pole group end plate as described above, and the pole group end plate is arranged in the housing.

[0016] The pole group end plate and battery of the embodiment of the utility model, the end plate body is arranged in the battery housing. An elastic buckle portion is arranged at the end of the end plate body. The end plate body can be fixed to the battery housing through the elastic buckle portion. This prevents the pole group end plate from shaking inside the battery when the battery is subjected to severe vibrations, etc., which can effectively solve the problem of low strength of the existing pole group end plate positioning method.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1It is a schematic diagram of the pole group end plate according to the utility model.

[0020] Figure 2 It is a cross-sectional view of the pole group end plate according to the utility model.

[0021] Figure 3 It is a schematic diagram of the pole group end plate according to another angle of the utility model.

[0022] Figure 4 It is a cross-sectional view of a partial structure of a battery according to the utility model.

[0023] Figure 5 It is a schematic diagram of a battery according to the utility model.

[0024] Figure markings: 1-end plate body; 10-partition; 101-first air vent; 102-second air vent; 103-third air vent; 11-first groove portion; 110-strip opening; 111-first bottom plate; 12-second groove portion; 120-second bottom plate; 121-through hole; 2-elastic snap portion; 21-elastic rib plate; 210-guide surface; 211-matching surface; 22-connecting rib plate; 3-battery; 30-housing; 31-cover plate; 310-explosion-proof valve. DETAILED DESCRIPTION

[0025] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0026] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0027] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0028] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0029] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0030] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0031] The terms used herein are only used to describe various examples and are not used to limit the examples. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprising" and "having" list the existence of the stated features, quantities, operations, components, elements and / or their combinations, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0032] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0033] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0034] like Figures 1 to 5 As shown, according to a first aspect of the present invention, a pole group end plate is provided, the pole group end plate comprising an end plate body 1 and an elastic buckle portion 2 .

[0035] In the following description, reference will be made to Figures 1 to 5 The specific structure of the above components of the pole group end plate and the connection relationship of the above components are described in detail.

[0036] like Figures 1 to 4 As shown, in the embodiment, the end plate body 1 can be arranged in the housing 30 of the battery 3. An elastic buckle portion 2 can be arranged at the end of the end plate body 1, so that the end plate body 1 can be fixed to the housing 30 of the battery 3 through the elastic buckle portion 2. In this way, when the battery 3 is affected by vibration, the pole group end plate is prevented from shaking in the housing 30, so as to effectively protect the pole lug of the battery 3.

[0037] Preferably, Figures 1 to 4 As shown, in the embodiment, the end plate body 1 can be approximately strip-shaped. The elastic buckle portion 2 can be arranged at both ends of the length direction of the end plate body 1. The elastic buckle portion 2 can abut against the inner wall of the housing 30, thereby limiting the end plate body 1 to limit the movement of the pole group end plate in the housing 30.

[0038] Preferably, Figures 1 to 4As shown, in an embodiment, the elastic buckle portion 2 may include an elastic rib 21 and a connecting rib 22. The bottom of the elastic rib 21 may be connected to the bottom of the end plate body 1. Specifically, the elastic rib 21 may be integrally formed with the end plate body 1. The plate surface of the elastic rib 21 may be parallel to the width direction of the end plate body 1. Preferably, the elastic rib 21 may be formed with a guide surface 210 and a mating surface 211. The guide surface 210 may be formed at the lower part of the elastic rib 21, and the guide surface 210 is connected to the bottom surface of the end of the end plate body 1. The guide surface 210 may be inclined from bottom to top in a direction away from the end plate body 1 to play a guiding role, so that the end plate body 1 is easily placed in the shell 30. The mating surface 211 may be arranged at the upper part of the guide surface 210. The bottom of the mating surface 211 may be connected to the top of the guide surface 210. The mating surface 211 is used to abut against the inner wall of the shell 30. The connecting rib plate 22 can be arranged between the elastic rib plate 21 and the end of the end plate body 1. The two ends of the connecting rib plate 22 can respectively connect the lower part of the elastic rib plate 21 and the end of the end plate body 1. Preferably, the elastic rib plate 21 can be integrally formed with the connecting rib plate 22 and the end plate body 1.

[0039] More preferably, Figures 1 to 4 As shown, in the embodiment, when the pole group end plate is placed inside the shell 30, the mating surface 211 is parallel to the inner wall surface of the shell 30. This arrangement allows the elastic buckle portion 2 to better contact the inner wall of the shell 30. The connecting rib plate 22 can be arranged parallel to the length direction of the end plate body 1. The end of the connecting rib plate 22 can be connected to the middle of the plate surface of the elastic rib plate 21 to provide support for the elastic rib plate 21. The height of the connecting rib plate 22 can be less than the height of the elastic rib plate 21, so that the upper part of the elastic rib plate 21 can be deformed to a certain extent to provide elastic force for abutment, so that the pole group end plate can be better fixed in the shell 30. In addition, preferably, the end plate body 1 can also be provided with inwardly bent baffles on both sides of the elastic buckle portion 2, and the baffles are used to protect the elastic buckle portion 2 on the side.

[0040] In addition, preferably, Figures 1 to 5 As shown, in the embodiment, the middle part of the end plate body 1 can be formed into a groove, and the notch of the groove can be arranged toward the cover plate 31 of the battery 3. A partition 10 can also be arranged in the groove of the end plate body 1. The partition 10 can be arranged along the width direction of the end plate body 1, thereby separating the end plate body 1 into a first groove portion 11 and a second groove portion 12. While the partition 10 plays a separation function, it can also increase the strength of the end plate body 1.

[0041] Preferably, Figures 1 to 4As shown, in the embodiment, the bottom of the first groove portion 11 may be formed with a strip opening 110 for the tab of the battery 3 to pass through. Specifically, the bottom of the first groove portion 11 may be provided with a first bottom plate 111 at some positions, and the position where the first bottom plate 111 is not provided is formed as the strip opening 110. The length of the strip opening 110 may be equal to the length of the first groove portion 11, and the width of the strip opening 110 may be smaller than the width of the first bottom plate 111, so that the tab can be gathered and shaped while passing through the strip opening 110.

[0042] Further, preferably, Figures 1 to 4 As shown, in the embodiment, the first bottom plate 111 and the strip-shaped opening 110 can be respectively arranged on both sides of the width direction of the first groove portion 11, that is, the pole lug is gathered on one side of the inside of the first groove portion 11. The first bottom plate 111 can be arranged to be inclined downward from the middle part in the width direction of the end plate body 1 to the side in the width direction. The pole lug of the battery 3 can be better gathered when passing through the strip-shaped opening 110. In addition, the inclined first bottom plate 111 can better fit the shape of the pole lug.

[0043] Preferably, Figures 1 to 4 As shown, in the embodiment, a first vent 101 may be further provided at the end of the first groove portion 11 connected to the elastic buckle portion 2. The first vent 101 may be provided at the upper edge of the first groove portion 11. Specifically, the first vent 101 may be formed at the upper end of the side wall of the first groove portion 11, and the first vent 101 may be formed as a notch with a cross section approximately in the shape of a trapezoid. The first vent 101 is used to enable the first groove portion 11 to communicate with the outside for gas when the upper portion of the first groove portion 11 is in close contact with other components.

[0044] In addition, preferably, Figures 1 to 5 As shown, in an embodiment, the length of the second groove portion 12 may be less than the length of the first groove portion 11. A second bottom plate 120 may be provided at the bottom of the second groove portion 12, and a plurality of through holes 121 may be provided on the second bottom plate 120. The through holes 121 are used for gas circulation. Preferably, the through holes 121 may be waist-shaped holes. A plurality of through holes 121 may be arranged in an array. The position of the second groove portion 12 may correspond to the position of the explosion-proof valve 310 of the battery 3 to better achieve the exhaust function.

[0045] Preferably, Figures 1 to 5As shown, in the embodiment, the second vent 102 and the third vent 103 may be respectively provided on both sides in the width direction of the second groove portion 12. The second vent 102 and the third vent 103 may be provided at the upper edge of the second groove portion 12. Specifically, the second vent 102 and the third vent 103 may be formed at the upper end of the side wall of the second groove portion 12, the second vent 102 and the third vent 103 may be formed as notches with a cross section approximately in the shape of a trapezoid, and the second vent 102 may be symmetrically provided with the third vent 103. The second vent 102 and the third vent 103 are used to enable the second groove portion 12 to circulate gas with the outside when the upper portion of the second groove portion 12 is in close contact with other components.

[0046] In addition, if Figure 4 and Figure 5 As shown, according to the second aspect of the present utility model, a battery 3 is provided, the battery 3 comprises a housing 30 and the pole group end plate as described above, the pole group end plate being arranged in the housing 30 .

[0047] Preferably, Figure 4 and Figure 5 As shown, in an embodiment, the pole group end plate may be arranged at the positive pole of the battery 3. The battery 3 may further include a cover plate 31, which is mounted at the end of the housing 30. The upper end of the pole group end plate may contact the bottom of the cover plate 31. The cover plate 31 may be provided with an explosion-proof valve 310, which corresponds to the position of the second groove portion 12 of the pole group end plate.

[0048] During use, elastic buckle parts 2 are provided at both ends of the electrode group end plate, so that the electrode group end plate can be fixed in the housing 30 of the battery 3 through the elastic buckle parts 2. This prevents the electrode group end plate from shaking in the housing 30 when the battery 3 is affected by vibration, etc., so as to effectively protect the tabs of the battery 3 and prevent the electrode group end plate from tearing the tabs.

[0049] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A pole group end plate, arranged in a battery, characterized in that: The pole group end plate comprises: an end plate body, the end plate body being disposed in a housing of the battery; and An elastic buckle portion is arranged at the end of the end plate body, and the end plate body is fixed to the battery shell through the elastic buckle portion.

2. The pole group end plate according to claim 1, characterized in that: The elastic buckle parts are arranged at two ends of the end plate body in the length direction, and the elastic buckle parts are in contact with the inner wall of the shell.

3. The pole group end plate according to claim 2, characterized in that: The elastic buckle portion comprises: an elastic rib plate, the bottom of which is connected to the bottom of the end plate body, the elastic rib plate being formed with a guide surface and a mating surface, the guide surface being inclined from bottom to top in a direction away from the end plate body, the mating surface being arranged at an upper portion of the guide surface, and the mating surface being used to abut against an inner wall of the shell; and The connecting rib plate is arranged between the elastic rib plate and the end of the end plate body, and the two ends of the connecting rib plate are respectively connected to the end of the elastic rib plate and the end of the end plate body.

4. The pole group end plate according to claim 1, characterized in that: At least a portion of the end plate body is formed as a groove, and a partition is further arranged in the end plate body, and the partition divides the end plate body into a first groove portion and a second groove portion.

5. The pole group end plate according to claim 4, characterized in that: A strip-shaped opening for allowing the tab of the battery to pass through is formed at the bottom of the first groove portion.

6. The pole group end plate according to claim 5, characterized in that: A first bottom plate is further disposed at the bottom of the first groove portion, and the first bottom plate is inclined downward from the middle portion in the width direction of the end plate body to the side edge in the width direction.

7. The pole group end plate according to claim 4, characterized in that: The end of the first groove portion connected to the elastic buckle portion is provided with a first vent, and the first vent is provided at an upper edge of the first groove portion.

8. The pole group end plate according to claim 4, characterized in that: A second bottom plate is disposed at the bottom of the second groove portion, and a plurality of through holes are opened on the second bottom plate. The position of the second groove portion corresponds to the position of the explosion-proof valve of the battery.

9. The pole group end plate according to claim 8, characterized in that: A second vent and a third vent are respectively disposed on both sides of the second groove portion in a width direction, and the second vent and the third vent are disposed on an upper edge of the second groove portion.

10. A battery, characterized in that: The battery comprises a housing and a pole group end plate according to any one of claims 1 to 9, wherein the pole group end plate is disposed in the housing.

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