Battery cover plate and battery monomer
By designing anti-rotation and reinforcing structures on the battery cover, the deformation problem caused by high injection molding temperature was solved, improving the structural strength and product performance of the battery cover.
Patent Information
- Application Number
- CN202422041876.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-08-22
AI Technical Summary
Existing battery covers deform due to high temperatures during injection molding, resulting in a decrease in structural strength and product performance, which affects battery performance.
A battery cover plate is designed, including a cover plate body, terminal posts and a rubber-coated ring. The cover plate body is provided with an anti-rotation structure and a reinforcing structure. The rubber-coated ring is formed by injection molding and is snapped into the anti-rotation structure to restrict rotation. When the injection molding temperature is high, the reinforcing structure is connected to the top surface of the cover plate body to increase the structural strength.
It improves the structural stability and product performance of the battery cover, reduces deformation, and enhances the overall strength of the battery cover.
Smart Images
Figure CN223471669U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field especially relates to a battery cover plate and battery monomer. BACKGROUND
[0002] The core power source of electric vehicle is power battery, so the performance of power battery is particularly important. Generally, the battery is mainly composed of cover plate, aluminum shell and battery core. The structure of the cover plate is the most complex, including cover body (aluminum sheet), pole and encapsulation etc. The current encapsulation is to put the aluminum sheet in cold state and the pole into hot mold (mold temperature is 130 DEG C). In the forming process, the mold is combined to inject glue. In the glue injection process, the mold is extruded sealing ring and lower plastic through the aluminum sheet and the pole to fix and compress the parts. However, in the compression process, due to the high temperature of injection molding, the aluminum sheet will deform. The deformed aluminum sheet seriously affects the structural strength of the battery cover plate and the product performance, and further affects the performance of the battery. To illustrate with specific numerical values, the high temperature in the injection molding process includes mold temperature 120 DEG C, 350 DEG C molten plastic in the mold closing process. The plastic is injected into the aluminum sheet, the aluminum sheet conducts heat quickly, and the temperature rises rapidly (the temperature taken out of the mold is more than 100 DEG C). The thermal expansion coefficient of aluminum is (2.36x10 -5 ), and the expansion coefficient of steel is (1.65x10 -5 ). Taking the aluminum sheet with a length greater than 200mm as an example, the length will deform (2.36x10 -5 x120x250=0.71mm).
[0003] Therefore, it is urgent to provide a battery cover plate and battery monomer to solve the above problems. INVENTION CONTENTS
[0004] The first purpose of the utility model is to provide a battery cover plate with high structural strength and good product performance.
[0005] To achieve this purpose, the utility model adopts the following technical scheme:
[0006] A battery cover plate comprises:
[0007] A cover plate body is provided with a through hole, a rotation stopping structure is arranged along the outer periphery of the through hole, a reinforcing structure is arranged along the inner side wall of the rotation stopping structure, and the reinforcing structure connects the side wall of the rotation stopping structure and the top surface of the cover plate body;
[0008] A pole is arranged in the through hole from the bottom of the cover plate body;
[0009] The encapsulation ring is formed by injection molding, the bottom of the encapsulation ring is provided with a rotation stopping groove, the shape of the rotation stopping groove is matched with the shape of the rotation stopping structure, the encapsulation ring is sleeved on the outer periphery of the pole column and buckled on the top surface of the cover plate body, the rotation stopping structure is clamped in the rotation stopping groove, and the rotation of the encapsulation ring is limited.
[0010] As an optional technical solution of the battery cover plate, the rotation stopping structure is an irregular polygonal boss ring which is not a cylinder.
[0011] As an optional technical solution of the battery cover plate, the rotation stopping structure comprises a plurality of boss segments which are spaced apart along the outer periphery of the through hole, and the rotation stopping groove comprises a plurality of groove segments which are spaced apart, the groove segments correspond to the boss segments one by one, and the shape of the groove segment is matched with the shape of the boss segment.
[0012] As an optional technical solution of the battery cover plate, the reinforcing structure comprises a plurality of reinforcing ribs, and the reinforcing ribs are spaced apart along the inner side wall of the rotation stopping structure.
[0013] As an optional technical solution of the battery cover plate, the bottom of the encapsulation ring is provided with a plurality of air avoidance grooves, the air avoidance grooves correspond to the reinforcing ribs one by one, and the shape of the air avoidance groove is matched with the shape of the reinforcing rib.
[0014] As an optional technical solution of the battery cover plate, the reinforcing structure is a reinforcing rib ring.
[0015] As an optional technical solution of the battery cover plate, the pole column comprises a column body and a bottom support, the column body is connected to the bottom support, the column body is arranged in the through hole from the bottom of the cover plate body, and the battery cover plate further comprises a sealing ring, the sealing ring is sleeved on the pole column, the inner side wall of the sealing ring abuts against the side wall of the pole column, the bottom of the sealing ring abuts against the top of the bottom support, and the top of the sealing ring at least partially abuts against the bottom of the cover plate body.
[0016] As an optional technical solution of the battery cover plate, the top end surface of the sealing ring is provided with a ring-shaped first inclined surface and a ring-shaped second inclined surface which are connected by steps, the first inclined surface and the second inclined surface are located between the hole wall of the through hole and the side wall of the column body, and the distance between the first inclined surface and the second inclined surface and the encapsulation ring in the vertical direction gradually increases from the hole wall of the through hole to the side wall of the column body in the length direction of the cover plate body.
[0017] As an optional technical solution of the battery cover plate, the movable elastic block is arranged at the end of the processing mold in the length direction, the movable elastic block can be popped out in the length direction of the processing mold, and the end of the processing mold is in an open state.
[0018] The second purpose of the utility model is to provide a battery monomer with good performance.
[0019] To achieve the purpose, the utility model adopts the following technical scheme:
[0020] The battery monomer comprises a battery shell, a battery cell and the battery cover plate, the battery cell is located in the battery shell, and the battery cover plate is blocked at the opening of the battery shell.
[0021] The utility model has the advantages of:
[0022] The battery cover plate comprises a cover plate body, a pole and a rubber-coated ring. The cover plate body is provided with a through hole, and the pole is arranged in the through hole from the bottom of the cover plate body. The cover plate body is provided with a rotation stopping structure; the rubber-coated ring is provided with a rotation stopping groove at the bottom, the shape of the rotation stopping groove is matched with the shape of the rotation stopping structure, the rubber-coated ring is sleeved on the outer periphery of the pole and buckled on the top surface of the cover plate body, the rotation stopping structure is clamped in the rotation stopping groove, the rotation of the rubber-coated ring is limited, the structural stability of the battery cover plate is improved. The rubber-coated ring is formed by injection molding, the high temperature of injection molding makes the cover plate body prone to extrusion deformation, the reinforcing structure is arranged along the inner side wall of the rotation stopping structure in the circumferential direction, the reinforcing structure is connected with the side wall of the rotation stopping structure and the top surface of the cover plate body, the structural strength of the cover plate body is increased, the deformation of the cover plate body is reduced, and the structural strength and performance of the battery cover plate are improved.
[0023] The battery monomer comprises a battery shell, a battery cell and the battery cover plate, the cover plate body in the battery cover plate is provided with a reinforcing structure to improve the structural strength of the cover plate body, and the structural strength of the battery cover plate is high, and the performance of the product is good. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a partial sectional view of the battery cover plate provided by the utility model embodiment;
[0025] Figure 2 It is a partial schematic view of the cover plate body in the battery cover plate provided by the utility model embodiment;
[0026] Figure 3 It is a structure schematic of the rubber-coated ring in the battery cover plate provided by the utility model embodiment Figure 1 ;
[0027] Figure 4 It is a structure schematic of the rubber-coated ring in the battery cover plate provided by the utility model embodiment Figure 2 ;
[0028] Figure 5 It is a structure schematic view of the sealing ring in the battery cover plate provided by the utility model embodiment;
[0029] Figure 6 It isFigure 5 Enlarged view at A;
[0030] Figure 7 The utility model discloses a battery cover plate and processing mould structure schematic diagram.
[0031] In the drawing:
[0032] 10, processing mould; 11, movable elastic block;
[0033] 100, cover plate body; 110, rotation stopping structure; 120, reinforcing structure; 101, through hole; 200, pole; 210, column body; 220, bottom support; 300, glue ring; 301, rotation stopping groove; 302, empty slot; 400, sealing ring; 410, first inclined plane; 420, second inclined plane. DETAILED DESCRIPTION
[0034] The utility model will be further explained in detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limit the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all structures.
[0035] In the description of the utility model, unless there is explicit definition and limitation, the terms "connect", "connection", "fix" should be understood broadly, for example, can be fixed connection, can be detachable connection, or be integrated, can be mechanical connection, can be electrical connection, can be direct connection, can be indirect connection through intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0036] In the utility model, unless there is explicit definition and limitation, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through other features between them. Moreover, the first feature "on", "above" and "on the surface of" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0037] In the description of the embodiments, the terms "upper", "lower", "right", "left", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.
[0038] The battery cover plate provided by the embodiment has high structural strength and good product performance.
[0039] Specifically, as shown in Figure 1 , Figure 2 and Figure 3 , the battery cover plate comprises a cover plate body 100, a pole 200 and a rubber-coated ring 300. The cover plate body 100 is provided with a through hole 101, and a rotation stopping structure 110 is arranged along the outer periphery of the through hole 101 on the cover plate body 100. A reinforcing structure 120 is arranged along the inner side wall of the rotation stopping structure 110 in the circumferential direction. The reinforcing structure 120 connects the side wall of the rotation stopping structure 110 and the top surface of the cover plate body 100. The pole 200 is arranged in the through hole 101 from the bottom of the cover plate body 100. The rubber-coated ring 300 is formed by injection molding. The rubber-coated ring 300 is provided with a rotation stopping groove 301 at the bottom. The shape of the rotation stopping groove 301 is matched with the shape of the rotation stopping structure 110. The rubber-coated ring 300 is sleeved on the outer periphery of the pole 200 and buckled on the top surface of the cover plate body 100, so that the rotation stopping structure 110 is clamped in the rotation stopping groove 301 to limit the rotation of the rubber-coated ring 300.
[0040] It should be noted that the position opposite to the reinforcing structure 120 at the bottom of the rubber-coated ring 300 is provided with a void.
[0041] Based on the above design, the through hole 101 is arranged on the cover plate body 100, and the pole 200 is arranged in the through hole 101, so that the pole 200 is pressed to connect the cover plate body 100 and other components. The rotation stopping structure 110 is arranged on the cover plate body 100. The rotation stopping groove 301 is arranged at the bottom of the rubber-coated ring 300. The shape of the rotation stopping groove 301 is matched with the shape of the rotation stopping structure 110. The rubber-coated ring 300 is sleeved on the outer periphery of the pole 200 and buckled on the top surface of the cover plate body 100, so that the rotation stopping structure 110 is clamped in the rotation stopping groove 301 to limit the rotation of the rubber-coated ring 300, thereby improving the structural stability of the battery cover plate. The rubber-coated ring 300 is formed by injection molding. The high temperature of injection molding makes the cover plate body 100 easy to be pressed and deformed. The reinforcing structure 120 is arranged along the inner side wall of the rotation stopping structure 110 in the circumferential direction. The reinforcing structure 120 connects the side wall of the rotation stopping structure 110 and the top surface of the cover plate body 100, thereby increasing the structural strength of the cover plate body 100, reducing the deformation of the cover plate body 100, and further improving the structural strength and product performance of the battery cover plate.
[0042] In some embodiments, the rotation-stopping structure 110 comprises a plurality of boss segments arranged along the outer periphery of the through hole 101, the rotation-stopping groove 301 comprises a plurality of groove segments arranged at intervals, the groove segments correspond to the boss segments one by one, and the shape of the groove segments is adapted to the shape of the boss segments. By clamping the boss segments in the groove segments, the relative rotation between the encapsulation ring 300 and the cover plate body 100 is limited.
[0043] In other embodiments, as shown in Figure 2 the rotation-stopping structure 110 is an irregular polygonal boss ring. By the irregular polygonal boss ring and the irregular non-circular rotation-stopping groove 301, the polygonal boss ring cannot rotate in the rotation-stopping groove 301, thereby limiting the relative rotation between the encapsulation ring 300 and the cover plate body 100. The polygonal boss ring arranged continuously along the outer periphery of the through hole 101 is simple to process, and the rotation-stopping groove 301 corresponding to the boss ring is also simple to process.
[0044] In the present embodiment, the boss ring is a quadrilateral boss ring.
[0045] Further, the structure of the reinforcing structure 120 can be various.
[0046] In some embodiments, the reinforcing structure 120 is a reinforcing rib ring, and the reinforcing rib ring is continuously arranged around the outer periphery of the through hole 101, thereby having a good reinforcing effect.
[0047] From the economic point of view, in other embodiments, the reinforcing structure 120 comprises a plurality of reinforcing rib blocks arranged at intervals along the inner side wall of the rotation-stopping structure 110. In order to further save materials, the reinforcing rib blocks are wedge-shaped blocks.
[0048] In the present embodiment, the number of reinforcing rib blocks is four. Of course, the number of reinforcing rib blocks can also be three, five, seven, eight, etc., and the present application does not specifically limit the number of reinforcing rib blocks.
[0049] As can be seen from the above, the reinforcing rib blocks will be located in the air-avoiding portion at the bottom of the encapsulation ring 300.
[0050] Optionally, the air-avoiding portion is an annular groove.
[0051] As shown in Figure 3 and Figure 4 In the present embodiment, the air-avoiding portion is an air-avoiding groove 302 arranged at intervals. Specifically, a plurality of air-avoiding grooves 302 are arranged near the side of the cover plate body 100, the air-avoiding grooves 302 correspond to the reinforcing rib blocks one by one, and the shape of the air-avoiding grooves 302 is adapted to the shape of the reinforcing rib blocks, so that the reinforcing rib blocks can be clamped in the air-avoiding grooves 302, the rotation of the reinforcing rib blocks is limited, and the relative rotation between the cover plate body 100 and the encapsulation ring 300 is further limited.
[0052] As shown in Figure 1 , Figure 5 and Figure 6 , in order to increase the sealing performance of the battery cover plate, the pole 200 includes a pole body 210 and a bottom support 220, the pole body 210 is connected to the bottom support 220, the pole body 210 is arranged in the through hole 101 from the bottom of the cover plate body 100, the battery cover plate further includes a sealing ring 400, the sealing ring 400 is sleeved on the pole 200, the inner side wall of the sealing ring 400 abuts against the side wall of the pole 200, the bottom of the sealing ring 400 abuts against the top of the bottom support 220, and the top of the sealing ring 400 at least partially abuts against the bottom of the cover plate body 100.
[0053] During the injection molding process, the sealing ring 400 extrudes the pole 200 and the cover plate body 100, and increases the deformation of the cover plate body 100. In the embodiment, the top end surface of the sealing ring 400 is provided with a stepped annular first inclined surface 410 and a second inclined surface 420, the first inclined surface 410 and the second inclined surface 420 are both located between the hole wall of the through hole 101 and the side wall of the pole body 210, and the distance of the first inclined surface 410 and the second inclined surface 420 from the rubber-coated ring 300 in the vertical direction gradually increases along the length direction of the cover plate body 100 from the hole wall of the through hole 101 to the side wall of the pole body 210. The first inclined surface 410 and the second inclined surface 420 are both located between the hole wall of the through hole 101 and the side wall of the pole body 210, so that a certain gap is left between the hole wall of the through hole 101 and the pole body 210, space is left for the deformation of the part of the sealing ring 400 that does not contact the cover plate body 100, and the deformation of the contact position of the sealing ring 400 and the cover plate body 100 is reduced. The distance of the first inclined surface 410 and the second inclined surface 420 from the rubber-coated ring 300 in the vertical direction gradually increases along the length direction of the cover plate body 100 from the hole wall of the through hole 101 to the side wall of the pole body 210, which also leaves space for the deformation of the sealing ring 400, and further reduces the deformation of the contact position of the sealing ring 400 and the cover plate body 100. That is, by reducing the extrusion of the sealing ring 400 on the cover plate body 100, the deformation of the cover plate body 100 is reduced, and the structural strength of the battery cover plate is increased. The battery cover plate further includes a lower plastic, the lower plastic is attached to the bottom of the cover plate body 100, and the pole 200 is sequentially arranged and connected to the lower plastic and the cover plate body 100.
[0054] It should be noted that the bottom of the rubber-coated ring 300 is arranged in the through hole 101, so that the bottom end surface of the rubber-coated ring 300 is flush with the non-first inclined surface 410 and the non-second inclined surface 420 of the top end surface of the sealing ring 400.
[0055] As shown in Figure 7As shown, the movable elastic block 11 is arranged at the length direction end of the battery cover plate processing die 10, and the movable elastic block 11 can be popped out along the length direction of the processing die 10, so that the end of the processing die 10 is in an open state, and plastic deformation of the cover plate body 100 is avoided when the cover plate body 100 is deformed and comes out of the processing die 10.
[0056] It should be noted that the pole 200 of the battery cover plate includes a positive pole and a negative pole, and two symmetrical through holes 101 are arranged along the length direction of the cover plate body 100, and the positive pole and the negative pole are arranged in the corresponding through holes 101.
[0057] The battery cover plate also includes two sealing rings 400 and two rubber-coated parts. In this embodiment, the structure and assembly mode of the positive pole and the negative pole are the same, and will not be described here. In other embodiments, the structure and assembly mode of the positive pole and the negative pole can also be different, and can be set according to the use requirement.
[0058] The battery cover plate also includes an explosion-proof valve and a liquid injection hole. The explosion-proof valve and the liquid injection hole are located between the positive pole and the negative pole.
[0059] The battery monomer provided in the embodiment has good product performance.
[0060] Specifically, the battery monomer includes a battery shell, a battery cell and the above-mentioned battery cover plate, the battery cell is located in the battery shell, and the battery cover plate is blocked at the opening of the battery shell. Since the battery cover plate has high structural strength, the battery monomer has good product performance.
[0061] Obviously, the above-mentioned embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A battery cover plate, characterized by, The application relates to a battery cover plate. The battery cover plate comprises a cover plate body (100) provided with a through hole (101), a rotation-stopping structure (110) arranged along the outer periphery of the through hole (101) on the cover plate body (100), a reinforcing structure (120) arranged along the inner side wall of the rotation-stopping structure (110) in a circumferential direction, and a rubber-coated ring (300) formed by injection molding. The bottom of the rubber-coated ring (300) is provided with a rotation-stopping groove (301) which is matched with the shape of the rotation-stopping structure (110). The rubber-coated ring (300) is arranged on the outer periphery of the pole column (200) and is buckled on the top surface of the cover plate body (100), so that the rotation-stopping structure (110) is clamped in the rotation-stopping groove (301) to limit the rotation of the rubber-coated ring (300).
2. The battery cover plate of claim 1, wherein, The rotation-stopping structure (110) is an irregular polygonal boss ring which is not a cylinder.
3. The battery cover plate of claim 1, wherein, The rotation-stopping structure (110) comprises a plurality of boss segments arranged along the outer periphery of the through hole (101) in a circumferential direction, and the rotation-stopping groove (301) comprises a plurality of groove segments arranged in a spaced manner, the groove segments are one-to-one corresponding to the boss segments, and the shape of the groove segments is matched with the shape of the boss segments.
4. The battery cover plate of claim 1, wherein, The reinforcing structure (120) comprises a plurality of reinforcing rib blocks arranged in a spaced manner along the inner side wall of the rotation-stopping structure (110) in a circumferential direction.
5. The battery cover plate of claim 4, wherein, The bottom of the rubber-coated ring (300) is provided with a plurality of air-avoiding grooves (302) which are one-to-one corresponding to the reinforcing rib blocks and matched with the shape of the reinforcing rib blocks.
6. The battery cover plate of claim 1, wherein, The reinforcing structure (120) is a reinforcing rib ring.
7. The battery cover plate of claim 1, wherein, The pole column (200) comprises a column body (210) and a bottom support (220), the column body (210) is connected to the bottom support (220), the column body (210) is arranged in the through hole (101) from the bottom of the cover plate body (100), the battery cover plate further comprises a sealing ring (400) arranged on the pole column (200), the inner side wall of the sealing ring (400) abuts against the side wall of the pole column (200), the bottom of the sealing ring (400) abuts against the top of the bottom support (220), and the top of the sealing ring (400) at least partially abuts against the bottom of the cover plate body (100).
8. The battery cover plate of claim 7, wherein, The top end surface of the sealing ring (400) is provided with a ring-shaped first inclined surface (410) and a ring-shaped second inclined surface (420) connected by steps, the first inclined surface (410) and the second inclined surface (420) are located between the hole wall of the through hole (101) and the side wall of the column (210), and the distance of the first inclined surface (410) and the second inclined surface (420) from the encapsulation ring (300) in the vertical direction gradually increases along the length direction of the cover plate body (100) from the hole wall of the through hole (101) to the side wall of the column (210).
9. The battery cover plate of claim 1, wherein, The length direction end of the battery cover plate processing die (10) is provided with a movable elastic block (11), the movable elastic block (11) can be ejected along the length direction of the processing die (10), so that the end of the processing die (10) is in an open state.
10. A battery cell, characterized by The battery cover plate is used for a battery, and the battery comprises a battery shell, a battery cell and the battery cover plate, the battery cell is located in the battery shell, and the battery cover plate is sealed at an opening of the battery shell.