Battery cover plate for increasing torsion of pole injection molding part
By designing injection-molded gripping holes, ridge-shaped reinforcing ribs, and notch structures in the lithium battery cover, combined with electrode positioning, the problem of loosening of the lithium battery cover under torque is solved, achieving higher mechanical strength and sealing reliability, and preventing electrolyte leakage.
Patent Information
- Application Number
- CN202423229493.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing lithium battery covers are prone to loosening when subjected to torque, leading to loss of mechanical strength and seal failure, which may result in electrolyte leakage.
A battery cover plate comprising a metal substrate, a base, a terminal post, a sealing ring, and a sealing gasket is designed. By setting injection-molded gripping holes, ridge-shaped reinforcing ribs, and notches on the base, and combining them with the injection-molded shell to form an injection-molded part, the contact area and torsional resistance are increased. The positioning post and sealing ring of the terminal post are used to improve the connection stability.
It effectively improves the anti-torsion ability of injection molded parts, prevents loosening, avoids seal failure and electrolyte leakage, and enhances mechanical strength and sealing performance.
Smart Images
Figure CN223858260U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to battery cover plate technical field especially relates to the battery cover plate of increasing pole post injection molding spare torsion. BACKGROUND
[0002] At present, lithium battery cover plate basically needs to adopt injection molding as basic structure, its function is to realize mechanical strength, cover internal connecting piece and the like, especially the cover plate of integral injection molding structure, because using the integral cover plate of injection molding structure, is only through injection molding to realize mechanical seal, does not set up other sealing mode.
[0003] Lithium battery in the PACK use process, it is very easy to produce the torsion of vertical pole post, under the premise of receiving torsion, if loose, will cause the mechanical strength of cover plate to disappear, simultaneously to the integral injection molding cover plate, will easily cause sealing failure and then cause electrolyte leakage and the like risk. INVENTION CONTENTS
[0004] The utility model discloses to the deficiency of prior art, provide the battery cover plate of increasing pole post injection molding spare torsion, to solve the technical problem that the mechanical strength of cover plate will disappear under the premise of integral injection molding cover plate receiving torsion if loose, simultaneously to the integral injection molding cover plate, will easily cause sealing failure and then cause electrolyte leakage and the like risk.
[0005] The purpose of the utility model can be realized through the following technical scheme:
[0006] The battery cover plate of increasing pole post injection molding spare torsion, including metal base plate, base, pole post, sealing ring and sealing gasket, the cover plate still includes:
[0007] Injection molding grab hole, the base is provided with a plurality of injection molding grab holes, and a part of the injection molding grab holes is located in the metal base plate.
[0008] Ridge type reinforcing rib, the base is provided with a plurality of ridge type reinforcing ribs, and the plurality of ridge type reinforcing ribs are arranged in a ring array.
[0009] Notch, the notch is formed between the adjacent two ridge type reinforcing ribs.
[0010] Injection molding shell, the base is provided with an injection molding shell, and the gap between the injection molding shell and the surface of the base forms an injection molding space.
[0011] As the preferred technical scheme, a plurality of annular grooves are formed in the base, and the annular grooves are located in the middle section of the injection molding grab holes.
[0012] As the preferred technical scheme of the above, the notch is long below and short above, and the ridge-shaped reinforcing rib is inverted trapezoidal.
[0013] As the preferred technical scheme of the above, the pole is provided with a plurality of injection holes on the periphery, and the injection holes are coincided with the notches when the pole passes through the base.
[0014] As the preferred technical scheme of the above, the bottom end of the pole is provided with a base, the base is provided with a plurality of positioning columns, and the bottom of the metal substrate is provided with a plurality of positioning holes, and the positioning columns are sleeved in the positioning holes.
[0015] As the preferred technical scheme of the above, the injection housing is provided with a through hole, and a stepped sealing ring is sleeved on the through hole, the sealing ring is abutted with the top end of the pole, and the sealing ring is completely coincided with the top end of the pole.
[0016] The utility model discloses the beneficial effect is:
[0017] 1. In the utility model, the injection part is firmly held in the injection hole after forming, the contact area between the injection part and the ridge-shaped reinforcing rib and the notch is increased, thereby increasing the strength of the injection part, the injection hole, the ridge-shaped reinforcing rib and the notch are arranged on the surface of the base, which can effectively improve the anti-twist ability of the injection part, prevent the loosening caused by excessive torsion during the use of the battery cell, prevent the sealing failure and the risk of electrolyte leakage, etc.
[0018] 2. In the utility model, the contact area between the injection part and the metal substrate in the injection hole is increased by the annular groove, thereby increasing the strength of the injection part in the injection hole and improving the anti-twist ability of the injection part, the injection part is filled in the notch and wrapped around the ridge-shaped reinforcing rib, the edge of the notch and the edge of the ridge-shaped reinforcing rib are inclined, thereby increasing the tensile strength of the injection part in the vertical direction, and the ridge-shaped reinforcing rib and the notch are annular arrays, thereby improving the anti-twist ability of the injection part.
[0019] 3. In the utility model, the injection part is connected with the pole, the position of the pole is always unchanged, and the connection between the injection part and the pole limits the movement and rotation of the injection part in the vertical direction, thereby further improving the anti-twist ability of the injection part. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is an explosion structure schematic view of the utility model;
[0021] Figure 2 It is a base structure schematic view;
[0022] Figure 3 It is a base cross section structure schematic view;
[0023] Figure 4 Figure 2 is a schematic view of the structure of the base after mounting the pole post thereon.
[0024] Figure 1 is a schematic view of the structure of the battery cover plate.
[0025] 1, metal base plate; 2, base; 21, injection hole; 211, annular groove; 22, ridge type reinforcing rib; 23, notch; 3, pole post; 31, base; 32, injection hole; 33, positioning column; 4, injection shell; 5, sealing ring; 6, sealing gasket; 7, sealing ring. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0027] As shown in Figure 1, the battery cover plate for increasing the torsion of the pole post injection part comprises a metal base plate 1, a base 2, a pole post 3, a sealing ring 5 and a sealing gasket 6, and further comprises: Figures 1-4
[0028] Injection hole 21, a plurality of injection holes 21 are formed on the base 2, and a part of the injection hole 21 is located in the metal base plate 1. The injection hole 21 is conical, and the larger end of the injection hole 21 is located in the metal base plate 1.
[0029] Ridge type reinforcing rib 22, a plurality of ridge type reinforcing ribs 22 are arranged on the base 2, and the plurality of ridge type reinforcing ribs 22 are arranged in an annular array.
[0030] Notch 23, the notch 23 is formed between the adjacent two ridge type reinforcing ribs 22.
[0031] Injection shell 4, the injection shell 4 is sleeved on the base 2, and the gap between the injection shell 4 and the surface of the base 2 forms an injection space. After injection into the injection space, the injection part is obtained.
[0032] In practical application, the injection-molded shell 4 is placed on the base 2. Plastic is injected into the injection-molded shell 4, which enters the injection-molding gripper hole 21, wraps around the ridge reinforcing rib 22, seals the notch 23, and fills the gap between the injection-molded shell 4 and the surface of the base 2 to form an injection space, thereby obtaining an injection-molded part. At this time, the injection-molded part located inside the injection-molding gripper hole 21 firmly grips the metal substrate 1. The contact area between the injection-molded part and the ridge reinforcing rib 22 and the notch 23 increases the contact area with the injection-molded part, thereby increasing the strength of the injection-molded part. By setting the injection-molding gripper hole 21, ridge reinforcing rib 22 and notch 23 at intervals on the surface of the base 2, the anti-torsion ability of the injection-molded part can be effectively improved, preventing loosening caused by excessive torque during the use of the battery cell, and preventing sealing failure and the risk of electrolyte leakage.
[0033] Furthermore, the base 2 has several annular grooves 211, which are located in the middle section of the injection molding gripper hole 21.
[0034] In practical applications, the annular groove 211 can increase the contact area between the injection molded part and the metal substrate 1 within the injection clamping hole 21, thereby increasing the strength of the injection molded part within the injection clamping hole 21 and further improving the anti-torsion capability of the injection molded part.
[0035] Furthermore, the notch 23 is longer at the bottom and shorter at the top, forming a trapezoidal shape, while the ridge-type reinforcing rib 22 is an inverted trapezoidal shape.
[0036] In practical application, after the plastic fills the notch 23 and wraps the ridge reinforcement 22, the edges of the notch 23 and the ridge reinforcement 22 are inclined, which increases the tensile strength of the injection molded part in the vertical direction. Furthermore, since the ridge reinforcement 22 and the notch 23 are both in a ring array, the anti-torsion ability of the injection molded part is improved.
[0037] like Figure 3 and Figure 4 As shown, the pole post 3 has several injection holes 32 around its periphery. When the pole post 3 passes through the base 2, the injection holes 32 coincide with the notches 23.
[0038] In practical application, the plastic will pass through the notch 23 and enter the injection hole 32, so that the injection molded part is connected to the pole 3 after molding. Since the position of the pole 3 remains unchanged, the injection molded part is connected to the pole 3, and the connection part restricts the vertical movement and rotation of the injection molded part, thereby further improving the anti-torsion capability of the injection molded part.
[0039] Furthermore, the bottom end of the pole post 3 is provided with a base 31, and a number of positioning posts 33 are provided on the base 31. A number of positioning holes are correspondingly opened at the bottom of the metal substrate 1, and the positioning posts 33 are fitted into the positioning holes.
[0040] In actual application, the positioning column 33 is sleeved in the positioning hole when the pole column 3 is installed, so that the position of the pole column 3 is fixed and always unchanged. Since the injection molding part is connected with the pole column 3, the injection molding part is not easy to move after being formed, and the anti-twist capability of the injection molding part is improved.
[0041] As shown in Figure 1 The injection molding shell 4 is provided with a through hole, and a stepped sealing ring 7 is sleeved at the through hole. The sealing ring 7 abuts against the top end of the pole column 3, and the sealing ring 7 is completely coincident with the top end of the pole column 3.
[0042] In actual application, the sealing ring 7 covers the top end of the pole column 3 during injection molding, so that the pole column 3 can be exposed when the injection molding shell 4 is removed after the injection molding is completed.
[0043] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model.
Claims
1. A battery cover plate for increasing the torsion of a pole post injection molded part, comprising a metal base plate (1), a pedestal (2), a pole post (3), a sealing ring (5) and a sealing gasket (6), characterized in that, The cover plate further comprises: Injection molded perforations (21), a plurality of injection molded perforations (21) are formed on the base (2), a part of the injection molded perforations (21) are located in the metal base plate (1), the injection molded perforations (21) are conical, and a larger end of the injection molded perforations (21) is located in the metal base plate (1); Ridge-shaped reinforcing ribs (22), a plurality of ridge-shaped reinforcing ribs (22) are arranged on the base (2), and the plurality of ridge-shaped reinforcing ribs (22) are arranged in a ring array; Notches (23), the notches (23) are formed between adjacent two ridge-shaped reinforcing ribs (22); Injection molded shells (4), the injection molded shells (4) are sleeved on the base (2), and a gap between the injection molded shells (4) and the surface of the base (2) forms an injection molding space, and an injection molded part is obtained after injection molding into the injection molding space.
2. The battery cover plate increasing the torsion of the pole post injection molded piece of claim 1, wherein, A plurality of annular grooves (211) are formed in the base (2), and the annular grooves (211) are located at the middle sections of the injection molded perforations (21).
3. The battery cover plate increasing the torsion of the pole post injection molded part of claim 2, wherein, The notches (23) are long at the bottom and short at the top, and are trapezoidal in shape, and the ridge-shaped reinforcing ribs (22) are inverted trapezoidal in shape.
4. The battery cover plate increasing the torsion of the pole post injection molded piece of claim 3, wherein, A plurality of injection holes (32) are formed around the pole (3), and when the pole (3) passes through the base (2), the plurality of injection holes (32) coincide with the plurality of notches (23).
5. The battery cover plate increasing the torsion of the pole post injection molded piece of claim 1, wherein, The pole (3) is provided with a base (31) at the bottom end, a plurality of positioning columns (33) are arranged on the base (31), a plurality of positioning holes are formed in the bottom of the metal base plate (1), and the positioning columns (33) are sleeved in the positioning holes.
6. The battery cover plate increasing the torsion of the pole post injection molded piece of claim 1, wherein, A through hole is formed in the injection molded shell (4), a stepped sealing ring (7) is sleeved at the through hole, the sealing ring (7) abuts against the top end of the pole (3), and the sealing ring (7) completely coincides with the top end of the pole (3).