Top cover bracket, battery top cover and square battery

Abstract

The utility model provides a top cover bracket, a battery top cover and a square battery. The top cover support is used for supporting the cover plate and comprises a main body piece and a clamping ring. The main body piece is in a long strip shape, and a first through hole is formed in the main body piece. The clamping ring is connected to the top surface of the main body piece, the clamping ring is arranged around the periphery of the first through hole, the clamping ring is used for being connected with the cover plate, and the inner side of the clamping ring protrudes out of the hole wall of the first through hole. The battery top cover and the square battery comprise the top cover bracket. According to the top cover bracket, the battery top cover and the square battery disclosed by the utility model, the clamping ring is arranged on the top cover bracket and can be clamped with the clamping groove of the cover plate, so that the top cover bracket and the cover plate are stably connected; according to the square battery, the inner side of the clamping ring protrudes out of the hole wall of the first through hole, so that the first through hole can be filled with the limiting ring of the injection molding part, the limiting ring is limited through the clamping ring, the injection molding part is prevented from being disengaged outwards, and the structural stability of the square battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of square batteries, in particular to a top cover bracket, a battery top cover and a square battery. Background Art

[0002] With the development of modern society and the enhancement of people's environmental awareness, more and more devices choose lithium batteries as power sources, such as mobile phones, laptops, power tools and electric vehicles, etc., which provides a broad space for the application and development of lithium batteries. Among them, the lithium batteries used in power tools and electric vehicles are generally called square batteries.

[0003] The square battery in the prior art includes a battery top cover and an outer shell. The battery top cover includes a top cover bracket, a cover plate, a pole and an injection molded part. The top cover bracket and the cover plate are stacked, and the pole is inserted through the top cover bracket and the cover plate. The injection molded part is arranged between the pole and the top cover bracket and the cover plate. During processing, the top cover bracket, the cover plate and the pole are placed in a plastic part mold, and the injection molded part is formed by injecting glue. The top cover bracket lacks a structure connected to the cover plate, and the two are easily displaced relative to each other during injection molding, resulting in abnormal molding of the injection molded part, affecting the sealing of the square battery. Moreover, the structure of the top cover bracket will not form a snap-on structure on the outer ring side of the injection molded part, causing the injection molded part to easily fall out, which also affects the sealing of the square battery.

[0004] Therefore, it is necessary to provide a top cover bracket, a battery top cover and a square battery to solve the above technical problems. Utility Model Content

[0005] The utility model provides a top cover bracket structure of a square battery, a battery top cover and a square battery, which can be stably connected with a cover plate and can also prevent injection molded parts from falling out to the outside, thereby improving the structural stability of the square battery.

[0006] The technical solution of the utility model is:

[0007] A top cover bracket, used for supporting a cover plate, the top cover bracket comprising:

[0008] A main body sheet, which is in a long strip shape and is provided with a first through hole; and

[0009] A snap ring is connected to the top surface of the main body sheet, the snap ring is arranged around the periphery of the first through hole, the snap ring is used to connect with the cover plate, and the inner side of the snap ring protrudes from the hole wall of the first through hole.

[0010] In the top cover bracket described in the utility model, the top cover bracket also includes two supporting structures, and the two supporting structures are respectively connected to the two ends of the bottom surface of the main body piece, and the supporting structure includes a first plate and a plurality of second plates, and the first plate and the plurality of second plates are both vertically connected to the bottom surface of the main body piece, and the first plate is a straight strip, which extends along the width direction of the main body piece, and the plurality of second plates are arranged along the width direction of the main body piece and vertically connected to the first plate.

[0011] In the top cover bracket of the utility model, the support structure is aligned with the edge of the main body piece.

[0012] In the top cover bracket of the utility model, the bottom corner of the second plate away from the first through hole is a chamfered corner.

[0013] In the top cover bracket described in the utility model, a groove is provided on the main body sheet, the main body sheet is convex downward at the groove, and the height of the support structure protruding from the main body sheet is greater than the protruding height of the main body sheet at the groove.

[0014] Another technical solution of the utility model is:

[0015] A battery top cover, comprising:

[0016] the top cover bracket mentioned above;

[0017] A cover plate, which is provided with a pole hole, wherein the pole hole includes a second through hole and a snap-fit ​​groove, wherein the second through hole and the snap-fit ​​groove are arranged and connected along the thickness direction of the cover plate, wherein the snap-fit ​​groove is connected to the bottom surface of the cover plate and is annularly arranged around the second through hole, and the snap-fit ​​ring is arranged in the snap-fit ​​groove;

[0018] A pole, which is inserted through the first through hole, the clamping ring and the pole hole;

[0019] The injection molded part is annular and is injection molded between the pole, the cover plate and the top cover bracket. A limiting ring is provided on the side of the outer ring of the injection molded part and filled in the first through hole. The clamping ring is clamped between the periphery of the first through hole and the limiting ring.

[0020] In the battery top cover of the utility model, the periphery of the cover plate protrudes from the periphery of the main body sheet.

[0021] Another technical solution of the utility model is:

[0022] A square battery, comprising:

[0023] The battery cover as described above; and

[0024] The outer shell is provided with the battery top cover at the opening of the outer shell.

[0025] In the square battery described in the utility model, the edge of the cover plate is provided with an L-shaped first stop groove, and / or the open end of the shell is provided with an L-shaped second stop groove, and the edge of the cover plate is mated with the open end of the shell.

[0026] In the square battery described in the utility model, the edge of the cover plate is provided with an L-shaped third stop groove and the open end of the shell is provided with an L-shaped fourth stop groove, and the edge of the cover plate is mated with the open end of the shell.

[0027] Compared with the prior art, the utility model has the following beneficial effects: the top cover bracket, battery top cover and square battery of the utility model can be engaged with the engaging groove of the cover plate by arranging a snap ring on the top cover bracket, thereby making the connection between the top cover bracket and the cover plate stable; by arranging the inner side of the snap ring to protrude from the hole wall of the first through hole, the limiting ring of the injection molded part can be filled in the first through hole, thereby limiting the limiting ring by the snap ring to prevent the injection molded part from falling out to the outside, thereby improving the structural stability of the square battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the utility model.

[0029] Figure 1 A schematic diagram of a partial cross-sectional structure of a square battery provided in the first preferred embodiment of the utility model.

[0030] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A.

[0031] Figure 3 A schematic diagram of the front structure of the top cover bracket of a square battery provided in the first preferred embodiment of the utility model.

[0032] Figure 4 A schematic diagram of the reverse structure of the top cover bracket of a square battery provided in the first preferred embodiment of the utility model.

[0033] Figure 5 A schematic diagram of the reverse structure of the cover plate of a square battery provided in the first preferred embodiment of the utility model.

[0034] Figure 6 A partial cross-sectional structural schematic diagram of a square battery provided in the second preferred embodiment of the utility model.

[0035] Figure 7A partial cross-sectional structural schematic diagram of a square battery provided in the third preferred embodiment of the utility model.

[0036] in,

[0037] Figure 1-Figure 5 The logo is as follows:

[0038] 11. Battery cover,

[0039] 111. Top cover bracket,

[0040] 1111, main body sheet, 11111, first through hole, 11112, groove,

[0041] 1112, snap ring,

[0042] 1113. Support structure, 11131. First plate, 11132. Second plate,

[0043] 112, cover plate, 1121, pole hole, 11211, second through hole, 11212, snap-fit ​​groove, 1122, first stop groove,

[0044] 113. Pole,

[0045] 114, injection molded parts, 1141, limit ring,

[0046] 12. Shell.

[0047] Figure 6 The logo is as follows:

[0048] 21. Cover plate,

[0049] 22. Shell.

[0050] Figure 7 The logo is as follows:

[0051] 31. Cover plate,

[0052] 32. Shell.

[0053] In the figures, structurally similar elements are denoted by the same reference numerals. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0055] Directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used for reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, and are not used to limit the present invention.

[0056] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The square battery in the prior art includes a battery top cover and an outer shell. The battery top cover includes a top cover bracket, a cover plate, a pole and an injection molded part. The top cover bracket and the cover plate are stacked, and the pole is inserted through the top cover bracket and the cover plate. The injection molded part is arranged between the pole and the top cover bracket and the cover plate. During processing, the top cover bracket, the cover plate and the pole are placed in a plastic part mold for injection molding. The top cover bracket lacks a structure connected to the cover plate, and the two are easily displaced relative to each other during injection molding, resulting in abnormal molding of the injection molded part, affecting the sealing of the square battery. Moreover, the structure of the top cover bracket will not form a snap-on structure on the outer ring side of the injection molded part, causing the injection molded part to easily fall out, which also affects the sealing of the square battery.

[0059] The following is a preferred embodiment of a square battery provided by the present invention that can solve the above technical problems.

[0060] Please refer to Figure 1-Figure 5 The first preferred embodiment of the utility model provides a square battery, which includes a battery cover 11 and a shell 12. The battery cover 11 is arranged at the opening of the shell 12. The shell 12 is preferably made of aluminum alloy or other hardware materials.

[0061] The battery top cover 11 includes a top cover bracket 111, a cover plate 112, a pole 113 and an injection molded part 114. The top cover bracket 111 is preferably made of plastic material such as PP or PE. The top cover bracket 111 is used to support the cover plate 112, and the top cover bracket 111 includes a main body sheet 1111 and a snap ring 1112. The main body sheet 1111 is in an elongated strip shape, and a first through hole 11111 is provided on the main body sheet 1111. The snap ring 1112 is connected to the top surface of the main body sheet 1111, and the snap ring 1112 is arranged around the periphery of the first through hole 11111. The snap ring 1112 is used to connect with the cover plate 112, and the inner side of the snap ring 1112 protrudes from the hole wall of the first through hole 11111.

[0062] The cover plate 112 is provided with a pole hole 1121, and the pole hole 1121 includes a second through hole 11211 and a snap-on groove 11212. The second through hole 11211 and the snap-on groove 11212 are arranged and connected along the thickness direction of the cover plate 112. The snap-on groove 11212 is connected to the bottom surface of the cover plate 112 and is annularly arranged around the second through hole 11211. The snap-on ring 1112 is arranged in the snap-on groove 11212. The cover plate 112 is preferably made of aluminum alloy or other hardware materials. The pole 113 is penetrated by the first through hole 11111, the snap-on ring 1112 and the pole hole 1121. The pole 113 is preferably made of aluminum alloy or other hardware materials. The pole 113 is arranged as one positive and one negative. The injection molded part 114 is annular and is injection molded between the pole 113, the cover plate 112 and the top cover bracket 111. A limit ring 1141 is provided on the outer ring side of the injection molded part 114, which is filled in the first through hole 11111. The clamping ring 1112 is clamped between the periphery of the first through hole 11111 and the limit ring 1141. The injection molded part 114 is preferably made of plastic material such as PP or PE.

[0063] The top cover bracket 111, the battery top cover 11 and the square battery of the utility model can be engaged with the engaging groove 11212 of the cover plate 112 by arranging a snap ring 1112 on the top cover bracket 111, thereby making the connection between the top cover bracket 111 and the cover plate 112 stable; by arranging the inner side of the snap ring 1112 to protrude from the hole wall of the first through hole 11111, the limiting ring 1141 of the injection molded part 114 can be filled in the first through hole 11111, thereby limiting the limiting ring 1141 by the snap ring 1112, so as to prevent the injection molded part 114 from falling out to the outside, thereby improving the structural stability of the square battery.

[0064] Please refer to Figure 4The top cover bracket 111 also includes two support structures 1113, and the two support structures 1113 are respectively connected to the two ends of the bottom surface of the main body sheet 1111. The support structure 1113 includes a first plate 11131 and a plurality of second plates 11132, and the first plate 11131 and the plurality of second plates 11132 are both vertically connected to the bottom surface of the main body sheet 1111. The first plate 11131 is a straight strip, which extends along the width direction of the main body sheet 1111. The plurality of second plates 11132 are arranged along the width direction of the main body sheet 1111 and are vertically connected to the first plate 11131. In the above structure, the two support structures 1113 can limit the cells of the square battery to prevent the cells from moving. The support structure 1113 is connected to a first plate 11131 and a plurality of second plates 11132 to form a cross-shaped structure. Compared with a solid support structure 1113, the weight of the support structure 1113 can be reduced and materials can be saved while ensuring that the structural strength of the support structure 1113 is high.

[0065] Please continue to refer to Figure 4 , the support structure 1113 is aligned with the edge of the main body sheet 1111. With this structure, it is convenient to accurately determine the position of the support structure 1113 during processing.

[0066] Please continue to refer to Figure 4 , please also refer to Figure 1 The bottom corner of the second plate 11132 away from the first through hole 11111 is rounded. With this structure, when the battery top cover 11 is assembled to the housing 12, it is convenient for the support structure 1113 to smoothly enter the housing 12.

[0067] Please refer to Figure 1 and Figure 3 The main sheet 1111 is provided with a groove 11112, the main sheet 1111 is convex downward at the groove 11112, and the height of the support structure 1113 protruding from the main sheet 1111 is greater than the protruding height of the main sheet 1111 at the groove 11112. In the above structure, the main sheet 1111 is convex downward at the groove 11112, which can prevent the main sheet 1111 from damaging the explosion-proof valve above it, and the height of the support structure 1113 protruding from the main sheet 1111 is greater than the protruding height of the main sheet 1111 at the groove 11112, so that the support structure 1113 can abut against the battery cell.

[0068] Please refer to Figure 1 , the periphery of the cover plate 112 protrudes from the periphery of the main body sheet 1111. With this structure, the outer shell 12 can be supported below the periphery of the cover plate 112, and when the battery top cover 11 is assembled with the outer shell 12, the battery top cover 11 will not shift downward.

[0069] Please refer to Figure 1 and Figure 5The edge of the cover plate 112 is provided with an L-shaped first stop groove 1122 , and the edge of the cover plate 112 is mated with the opening end of the shell 12 .

[0070] The second preferred embodiment of the utility model provides a square battery, which is different from the square battery of the first preferred embodiment in that an L-shaped second stop groove is provided at the open end of the shell 22, and the edge of the cover plate 21 is mated with the open end of the shell 22.

[0071] The third preferred embodiment of the utility model provides a square battery, which is different from the square battery of the first preferred embodiment in that an L-shaped third stop groove is provided at the edge of the cover plate 31, and an L-shaped fourth stop groove is provided at the open end of the shell 32, and the edge of the cover plate 31 is mated with the open end of the shell 32.

[0072] The processing process of the square battery of the first preferred embodiment of the utility model is as follows:

[0073] 1. Assemble the snap ring 1112 into the snap groove 11212, so that the top cover bracket 111 and the cover plate 112 are connected together;

[0074] 2. Insert the pole 113 into the first through hole 11111, the clamping ring 1112 and the pole hole 1121, and place the top cover bracket 111, the cover plate 112 and the pole 113 on the injection mold jig. The injection mold jig, the top cover bracket 111, the cover plate 112 and the pole 113 together form a closed injection molding cavity, and inject glue into the injection molding cavity to form an injection molded part, thereby forming an integrated battery top cover 11;

[0075] 3. Install the battery top cover 11 at the opening of the outer shell 12 so that the open end of the outer shell 12 is assembled in the first stop groove 1122, and weld the connection between the two.

[0076] This completes the processing of the square battery of this preferred embodiment.

[0077] The top cover bracket, battery top cover and square battery of the utility model can be engaged with the engaging groove of the cover plate by arranging a snap ring on the top cover bracket, thereby making the connection between the top cover bracket and the cover plate stable; by arranging the inner side of the snap ring to protrude from the hole wall of the first through hole, the limiting ring of the injection molded part can be filled in the first through hole, so that the limiting ring is limited by the snap ring to prevent the injection molded part from falling out to the outside, thereby improving the structural stability of the square battery.

[0078] To sum up, although the present invention has been disclosed as above in the form of preferred embodiments, the protection scope of the present invention is not limited thereto, and any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the concept of the technical solution of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A top cover bracket, used to support a cover plate, characterized in that: The top cover bracket comprises: A main body sheet, which is in a long strip shape and is provided with a first through hole; and A snap ring is connected to the top surface of the main body sheet, the snap ring is arranged around the periphery of the first through hole, the snap ring is used to connect with the cover plate, and the inner side of the snap ring protrudes from the hole wall of the first through hole.

2. The top cover bracket according to claim 1, characterized in that: The top cover bracket also includes two supporting structures, which are respectively connected to the two ends of the bottom surface of the main body piece. The supporting structure includes a first plate and a plurality of second plates, and the first plate and the plurality of second plates are both vertically connected to the bottom surface of the main body piece. The first plate is a straight strip extending along the width direction of the main body piece, and the plurality of second plates are arranged along the width direction of the main body piece and vertically connected to the first plate.

3. The top cover bracket according to claim 2, characterized in that: The support structure is aligned with an edge of the body sheet.

4. The top cover bracket according to claim 3, characterized in that: A bottom corner of the second plate away from the first through hole is rounded.

5. The top cover bracket according to claim 2, characterized in that: The main body sheet is provided with a groove, the main body sheet is convex downward at the groove, and the height of the support structure protruding from the main body sheet is greater than the protruding height of the main body sheet at the groove.

6. A battery top cover, characterized in that: include: The top cover bracket according to any one of claims 1 to 5; A cover plate, which is provided with a pole hole, wherein the pole hole includes a second through hole and a snap-fit ​​groove, wherein the second through hole and the snap-fit ​​groove are arranged and connected along the thickness direction of the cover plate, wherein the snap-fit ​​groove is connected to the bottom surface of the cover plate and is annularly arranged around the second through hole, and the snap-fit ​​ring is arranged in the snap-fit ​​groove; A pole, which is inserted through the first through hole, the clamping ring and the pole hole; The injection molded part is annular and is injection molded between the pole, the cover plate and the top cover bracket. A limiting ring is provided on the side of the outer ring of the injection molded part and filled in the first through hole. The clamping ring is clamped between the periphery of the first through hole and the limiting ring.

7. The battery top cover according to claim 6, characterized in that: The periphery of the cover plate protrudes from the periphery of the main body sheet.

8. A square battery, characterized in that: include: The battery top cover according to any one of claims 6 to 7; as well as, The outer shell is provided with the battery top cover at the opening of the outer shell.

9. The square battery according to claim 8, characterized in that: The edge of the cover plate is provided with an L-shaped first stop groove, and / or the open end of the shell is provided with an L-shaped second stop groove, and the edge of the cover plate is matingly connected with the open end of the shell.

10. The square battery according to claim 8, characterized in that: The edge of the cover plate is provided with an L-shaped third stop groove and the open end of the shell is provided with an L-shaped fourth stop groove, and the edge of the cover plate is mated with the open end of the shell.

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