Lithium battery cover plate structure convenient to position

Abstract

The utility model discloses a lithium battery cover plate structure convenient to position, including cover plate main part, pole post bottom plate and explosion -proof valve protection patch, be equipped with the installation groove for installing pole post bottom plate on cover plate main part still including positioning structure, positioning structure includes the R angle / C angle positioning unit for positioning four corners of pole post bottom plate, R angle / C angle positioning unit is equipped with the arc -shaped recess or inclined protruding piece in four corners of installation groove, and the shape of arc -shaped recess or inclined protruding piece is compatible with four corners of pole post bottom plate, the side of explosion -proof valve protection patch is equipped with at least one gap. Like this, only for pole post bottom plate four corners positioning, need not set up convex rib, release the stop frame space, increase pole post area, improve the over -current capacity, and the side of explosion -proof valve protection patch is with the gap, can improve the air permeability, prevent the intumescent with electrolyte residue, guarantee explosion -proof valve function, reduce the security hidden danger caused by the protection failure, prolong the service life of lithium battery.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a lithium battery cover structure that is easy to position. Background Technology

[0002] In lithium battery manufacturing, cover plate positioning and explosion-proof valve protection are crucial to battery performance and safety.

[0003] Traditional cover plate stop frames have a mounting groove at the bottom for installing the pole post assembly. The pole post assembly includes a pole post base plate 01 and pole posts vertically connected to the upper surface of the pole post base plate 01. For positioning the pole post base plate 01, a raised rib 02 is typically provided around the mounting groove to form a positioning structure (e.g., Figure 1 As shown), the periphery of the base plate 01 of the terminal post is used for positioning. The entire battery terminal structure is riveted by a riveting mold. Due to the height difference between the ribs and the base plate of the terminal post, a corresponding clearance groove is opened on the riveting mold. One end of the base plate of the terminal post is positioned by a ring of ribs, and the other end is sunk into the clearance groove to achieve positioning. The above positioning method relies on the cooperation of the protruding ribs around the terminal post and the clearance groove of the mold, which has the problem of limited space utilization of the stop frame 03.

[0004] On the other hand, the current explosion-proof valve protective patch 04 uses a PET material with a cutout design 05 to achieve a breathable and waterproof effect (such as...). Figure 2 As shown, to prevent the battery from breathing during formation, the patch may become too sealed and detach, or the waterproof effect may be poor during battery filling, causing the electrolyte to flow into the cavity between the patch and the explosion-proof valve and crystallize. The above methods are prone to detachment and electrolyte residue crystallization, and cannot solve both waterproof and breathable problems.

[0005] Therefore, a new type of cover plate structure is urgently needed to solve the problems of positioning and protection. Utility Model Content

[0006] To address the technical problems existing in the background art, this utility model proposes a lithium battery cover structure that is easy to position.

[0007] This utility model proposes a lithium battery cover structure for easy positioning, including a cover body, a terminal base plate, and an explosion-proof valve protective patch. The cover body is provided with a mounting groove for mounting the terminal base plate, and also includes a positioning structure. The positioning structure includes R-angle / C-angle positioning units for positioning the four corners of the terminal base plate. The R-angle / C-angle positioning units are set as arc-shaped grooves or oblique protrusions located at the four corners of the mounting groove, and the arc-shaped grooves or oblique protrusions are adapted to the shape of the four corners of the terminal base plate. The explosion-proof valve protective patch has at least one notch on its side.

[0008] Preferably, when there is a protrusion on the side of the pole base plate, the positioning structure further includes a rib notch positioning unit. The rib notch positioning unit includes a side rib disposed on the side of the cover plate body. The side rib is provided with a through rib notch, and the rib notch is adapted to the protrusion.

[0009] Preferably, the number of rib notches is the same as the number of protrusions on the side of the pole base plate, and their positions correspond one-to-one; the depth of the rib notches is greater than or equal to the height of the protrusions.

[0010] Preferably, when the four corners of the pole base plate are beveled, the R-angle / C-angle positioning unit is configured as the beveled protrusions located at the four corners of the mounting groove and adapted to the beveled angles; when the four corners of the pole base plate are rounded, the R-angle / C-angle positioning unit is configured as the arc-shaped grooves located at the four corners of the mounting groove and adapted to the rounded corners.

[0011] Preferably, the notch shape of the explosion-proof valve protective patch is rectangular, triangular, or trapezoidal.

[0012] Preferably, when the side of the pole base plate has a protrusion, the R-angle / C-angle positioning unit and the rib notch positioning unit are used for positioning; when the side of the pole base plate does not have a protrusion, only the R-angle / C-angle positioning unit is used for positioning.

[0013] In summary, this utility model has the following beneficial effects: The use of R-angle / C-angle positioning units only requires positioning at the four corners of the electrode base plate, eliminating the need for raised ribs surrounding the electrode base plate within the mounting groove. This frees up space in the stop bracket, increases the electrode area, improves current carrying capacity, makes the lithium battery more efficient in conducting electricity, adapts to high power requirements, optimizes the internal layout, and maximizes the utilization of the internal space of the stop bracket. The explosion-proof valve protection patch has a notch on the side, replacing the traditional PET cut-out design, which improves breathability, prevents indentation and electrolyte residue, ensures the explosion-proof valve function, reduces safety hazards caused by protection failure, and extends the lifespan of the lithium battery.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] Figure 1 A schematic diagram showing how to position the pole post base plate by adding a raised rib ring inside the existing mounting groove;

[0016] Figure 2 A schematic diagram of the structure of the cutout on the surface of an existing PET explosion-proof valve protective patch;

[0017] Figure 3This is an exploded view of the lithium battery cover structure for easy positioning according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the mounting slot with R-angle / C-angle positioning unit in an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the rib notch positioning unit according to an embodiment of the present utility model;

[0020] Figure 6 This is a schematic diagram of the explosion-proof valve protective patch with a notch on the side, according to an embodiment of the present invention.

[0021] Figure 3-6 middle:

[0022] 1. Stop bracket; 2. Pole post base plate; 21. Protrusion; 3. Explosion-proof valve protective patch; 31. Notch; 4. Angled protrusion; 5. Arc-shaped groove; 6. Side rib; 61. Rib notch. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] like Figure 3-6 As shown in the figure, this embodiment proposes a lithium battery cover structure that facilitates positioning, including a cover body, a terminal base plate 2, and an explosion-proof valve protection patch 3. The cover body is provided with a mounting groove for mounting the terminal base plate 2 (the cover body includes a base plate, a stop frame 1, etc.), and also includes a positioning structure. The positioning structure includes R-corner / C-corner positioning units for positioning the four corners of the terminal base plate 2. The R-corner / C-corner positioning units are set as arc-shaped grooves 5 or oblique protrusions 4 located at the four corners of the mounting groove. The arc-shaped grooves 5 or oblique protrusions 4 are adapted to the shapes of the four corners of the terminal base plate 2. The explosion-proof valve protection patch 3 has at least one notch 31 on its side. This notch 31 can improve air permeability and prevent excessive sealing. At the same time, when the battery is left to age, the electrolyte that has seeped in can also flow out directly through the side notch 31, so as not to accumulate in the cavity.

[0025] Specifically, the notch 31 of the explosion-proof valve protection patch 3 is designed to be rectangular, triangular, or trapezoidal, depending on the specific situation.

[0026] Specifically, when the four corners of the pole base plate 2 are beveled, the R-angle / C-angle positioning unit is set as an oblique protrusion 4 that matches the beveled angle and located at the four corners of the mounting groove; when the four corners of the pole base plate 2 are rounded, the R-angle / C-angle positioning unit is set as an arc-shaped groove 5 that matches the rounded corner and located at the four corners of the mounting groove.

[0027] Place the pole base plate 2 in the mounting groove of the cover plate body, so that the four corners of the pole base plate 2 cooperate with the R-corner / C-corner positioning units at the four corners of the mounting groove. The corners are used to cooperate with the oblique protrusions 4 or the arc-shaped grooves 5 for positioning. No rib groove is needed, which increases the pole area and completes the initial positioning.

[0028] Thus, by using R-angle / C-angle positioning units, positioning is only required at the four corners of the terminal base plate 2. There is no need to set up raised ribs around the terminal base plate 2 in the mounting groove, which frees up space for the stop bracket 1, increases the terminal area, improves the current carrying capacity, makes the lithium battery conduction more efficient, adapts to high power requirements, optimizes the internal layout, and maximizes the use of the internal space of the stop bracket 1. The explosion-proof valve protection patch 3 has a notch 31 on the side, which replaces the traditional PET cut-out design. It changes the breathable and waterproof path and the residual discharge method, which can improve breathability, prevent indentation and electrolyte residue, ensure the function of the explosion-proof valve, reduce safety hazards caused by protection failure, and extend the service life of the lithium battery.

[0029] Furthermore, when there is a protrusion 21 on the side of the pole post base plate 2, the positioning structure also includes a rib notch positioning unit. The rib notch positioning unit includes a side rib 6 provided on the side of the cover plate body, and a through rib notch 61 is provided on the side rib 6. The rib notch 61 is adapted to the protrusion 21. The protrusion 21 is provided on the side of some pole post base plates 2 for the rib notch 61 positioning scenario, which solves the problem that the height of the protrusion stop bracket is too low, thus making it impossible to use slot positioning riveting.

[0030] Furthermore, the number of rib notches 61 is the same as the number of protrusions 21 on the side of the pole base plate 2, and their positions correspond one-to-one; the depth of the rib notches 61 is greater than or equal to the height of the protrusions 21.

[0031] It should be noted that when the side of the pole base plate 2 has a protrusion 21, the positioning is done by a combination of the R-angle / C-angle positioning unit and the rib notch positioning unit; when the side of the pole base plate 2 does not have a protrusion 21, the positioning is done by only the R-angle / C-angle positioning unit.

[0032] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lithium battery cover structure for easy positioning, comprising a cover body, an electrode post base plate, and an explosion-proof valve protective patch, wherein the cover body is provided with a mounting groove for mounting the electrode post base plate, characterized in that, It also includes a positioning structure, which includes R-angle / C-angle positioning units for positioning the four corners of the pole base plate. The R-angle / C-angle positioning units are set as arc-shaped grooves or oblique protrusions located at the four corners of the mounting groove. The arc-shaped grooves or oblique protrusions are adapted to the shape of the four corners of the pole base plate. The side of the explosion-proof valve protective patch is provided with at least one notch.

2. The lithium battery cover structure for easy positioning according to claim 1, characterized in that, When there is a protrusion on the side of the pole base plate, the positioning structure further includes a rib notch positioning unit. The rib notch positioning unit includes a side rib provided on the side of the cover plate body. The side rib is provided with a through rib notch, and the rib notch is adapted to the protrusion.

3. The lithium battery cover structure for easy positioning according to claim 2, characterized in that, The number of rib notches is the same as the number of protrusions on the side of the pole base plate, and their positions correspond one-to-one; the depth of the rib notches is greater than or equal to the height of the protrusions.

4. The lithium battery cover structure for easy positioning according to claim 1, characterized in that, When the four corners of the pole base plate are beveled, the R-angle / C-angle positioning unit is configured as the beveled protrusions located at the four corners of the mounting groove and adapted to the beveled angles; when the four corners of the pole base plate are rounded, the R-angle / C-angle positioning unit is configured as the arc-shaped grooves located at the four corners of the mounting groove and adapted to the rounded corners.

5. The lithium battery cover structure for easy positioning according to claim 1, characterized in that, The notch shape of the explosion-proof valve protective patch is set to rectangular, triangular or trapezoidal.

6. The lithium battery cover structure for easy positioning according to claim 2, characterized in that, When the side of the pole base plate has a protrusion, the R-angle / C-angle positioning unit and the rib notch positioning unit are used for positioning; when the side of the pole base plate does not have a protrusion, only the R-angle / C-angle positioning unit is used for positioning.

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