Battery cover plate structure with high-torsion pole
By introducing an anti-rotation mechanism and a groove design into the battery cover structure, the problems of poor torsional performance of the terminal post and easy deformation of the riveting are solved, achieving a stable connection and improved sealing of the terminal post, and ensuring the strength and sealing of the battery cover.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-03-03
AI Technical Summary
In existing battery cover structures, the constraint force of the terminals in the circumferential direction is insufficient, resulting in poor torsional performance, easy rotation of the terminals, poor sealing effect, and easy damage to the product appearance due to the riveting process.
The first and second anti-rotation mechanisms are adopted, which restrict the rotation of the pole post and the inner insulating ring through the cooperation of dovetail groove and protrusion; a groove is set on the outer wall of the gland edge, and the material accumulates in the groove during riveting to avoid deformation; the outer insulating ring is engaged with the inner insulating ring through the insert to enhance the connection stability.
It improves the circumferential limiting ability of the terminal post, enhances the sealing and structural strength, prevents the terminal post from rotating, avoids deformation and leakage during riveting, and ensures the overall compactness and sealing of the battery cover.
Smart Images
Figure CN223967267U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cover technology, specifically to a battery cover structure with strong torsional strength of the terminal post. Background Technology
[0002] Currently, battery cover structures have been widely used in the new energy field. However, with market competition, the market requirements for battery cover structures are getting higher and higher. In particular, in order to ensure production efficiency, the original battery cover was mostly fixed by press riveting. However, in order to ensure that the press connection points are more firm and reliable and the surface of the riveting is smooth, spin riveting is often used instead.
[0003] However, in existing battery cover structures, if the battery cover is simply riveted to the inner insulation, sealing ring, and terminal post using a riveting process, the terminal post is only subject to axial constraint and will not detach from the battery cover. However, the constraint force in the circumferential direction is insufficient, resulting in defects in the anti-rotation effect of the terminal post, poor torsional performance, and the terminal post is very easy to rotate. The sealing effect between the terminal post and the sealing ring is inevitably leaking, and the electrolyte inside the battery may leak out, posing a safety hazard. Secondly, although the spin riveting process can effectively ensure the product's firmness and stability, the riveted end of the product subjected to the force of the riveting head often wrinkles, which has a significant impact on the product's appearance.
[0004] In conclusion, the existing battery cover structure still needs further improvement to meet practical usage requirements. Utility Model Content
[0005] This utility model provides a battery cover structure with strong torsional strength for battery terminals, mainly solving the problems of poor torsional strength and easy wrinkling during riveting of existing battery terminals. The main technical solution adopted is as follows:
[0006] A battery cover structure with strong torsional strength for the terminal post includes a cover plate, an inner insulating ring, a sealing ring, a pressure cap edge, and a terminal post. The cover plate has a through hole and an annular groove offset radially from the through hole for placing the sealing ring. The terminal post is disposed on the sealing ring and is fixedly connected to the inner insulating ring, which is fitted onto its stepped surface, via a first anti-rotation mechanism. The pressure cap edge extends along the height of the cover plate and can be folded towards the annular groove under force to press the inner insulating ring against the sealing ring. The pressure cap edge is located on the outer periphery of the annular groove, and its inner sidewall is fitted with the outer sidewall of the inner insulating ring via a second anti-rotation mechanism to restrict the rotational movement of the inner insulating ring. The pressure cap edge has several radially opening grooves on its outer sidewall, the depth of which is less than the thickness of the pressure cap edge.
[0007] Preferably, each of the grooves is perpendicular or inclined to the end face of the cover plate, and the grooves are spaced apart in the circumferential direction of the cover edge.
[0008] Preferably, the groove extends from the end face of the cover plate to the top face of the pressing edge. Preferably, the groove is offset from and corresponds to the second anti-rotation mechanism.
[0009] Preferably, the second anti-rotation mechanism includes at least one stop block located on the outer periphery of the inner insulating ring and at least one stop groove located on the inner sidewall of the pressure cap edge, wherein the stop block and the stop groove are engaged and installed; wherein the stop groove and the groove are misaligned and corresponding.
[0010] Preferably, the stop groove extends from the bottom to the top of the cap edge; the stop block is arc-shaped and its curvature matches the curvature of the cap edge when it is folded and deformed.
[0011] Preferably, the first anti-rotation mechanism includes a first mating part disposed on the stepped surface of the pole post and a second mating part disposed on the inner insulating ring. The first mating part is configured as at least one dovetail groove disposed on the stepped surface, and the second mating part is configured as at least one protrusion disposed on the inner circumference of the inner insulating ring. The protrusion and the dovetail groove are mutually adapted and engaged.
[0012] Preferably, it further includes an outer insulating ring sleeved on the outer periphery of the cap edge, the outer insulating ring having at least one insert at its inner periphery; the top surface of the inner insulating ring has at least two gap-set blocks, and when the outer insulating ring is sleeved on the outer periphery of the cap edge, the inner insulating ring engages with the insert through the gap between each of the blocks.
[0013] Preferably, there are two stop grooves arranged symmetrically to each other, and the stop grooves extend from the bottom to the top of the cover edge; there are two stop blocks arranged symmetrically to each other, the stop blocks are arc-shaped, and their arc is adapted to the arc of the cover edge folding and deforming.
[0014] Preferably, it also includes a lower plastic piece, which is installed on the lower end of the cover plate by a fastening mechanism; the fastening mechanism includes a fastening groove recessed on the annular groove and a fastening part provided on the end face of the lower plastic piece, the fastening groove being located on the outer periphery of the through hole; the fastening part is engaged in the fastening groove to fit and install the lower plastic piece with the cover plate.
[0015] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:
[0016] (1) This utility model provides a battery cover structure with strong torsional performance of the terminal post, which solves the problem of poor torsional performance of existing battery terminals and easy wrinkling during riveting. The technical solution of this utility model, through the setting of the first anti-rotation mechanism and the second anti-rotation mechanism, can not only perform the overall installation of the terminal post and the battery cover, ensuring the compactness of the battery cover structure, but also ensure the circumferential positioning of the terminal post, the sealing performance of the terminal post and the sealing ring is excellent, the electrolyte is not easy to seep out from the through hole, and it is not easy to rotate under torsional force in the later stage, with extremely strong torsional performance; and in the battery cover structure of this utility model, several grooves are set on the outer wall of the cover edge, so when the riveting head of the riveting machine acts on the cover edge and drives it to fold, the cover edge can accumulate material into the groove, and the entire cover edge will not deform and wrinkle. Secondly, the groove depth is less than the thickness of the cover edge, rather than a through slot, so the strength of the cover edge is guaranteed to a certain extent, and it is not easy to deform on its own under impact force, thus affecting the sealing performance of the battery cover.
[0017] (2) In this technical solution, the groove is set vertically or inclined so as to adapt to the rotational force generated during riveting, so that the material of the cover edge can be deformed and accumulated into the groove; at the same time, the multiple grooves are set at intervals on the cover edge, which helps the entire cover edge to deform and accumulate into the groove under force, without local wrinkling, and the anti-wrinkling effect is obvious.
[0018] (3) In this technical solution, the groove and the stop groove in the second anti-rotation mechanism are misaligned and corresponding. In this way, the overall thickness of the cover edge will not be restricted to be very thin, which will result in the cover edge being too thin and the structural strength being insufficient. Thus, through the misaligned and corresponding design, the thickness of the cover edge can be effectively guaranteed, so that the cover edge is not easily deformed automatically under force, and the structural strength is guaranteed.
[0019] (4) In this technical solution, the stop block is set in an arc shape, and its arc design is compatible with the arc of the cover edge folding and deforming. In this way, when the cover edge flips and deforms and presses down onto the stop block, the gap between the two can be filled and the contact area between the two is greater, thus further ensuring the sealing performance and structural strength.
[0020] (5) The first and second mating parts in the first anti-rotation mechanism are mainly designed with dovetail grooves and protrusions, which can further improve the stability of anti-rotation and improve the anti-rotation capability of the pole.
[0021] (6) The outer insulating ring is inserted into the cavity between the inner insulating ring and the pressure cover edge through the barb part, so that the outer insulating ring is less likely to fall off, ensuring the sealing of the battery cover.
[0022] (7) The lower plastic is installed on the cover plate by snapping on the snap-fit mechanism, which can ensure the insulation of the pole and prevent leakage. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of the battery cover plate according to an embodiment of the present utility model;
[0025] Figure 2 This is an exploded view of the battery cover plate according to an embodiment of the present invention;
[0026] Figure 3 This is an exploded cross-sectional view of the battery cover plate according to an embodiment of the present utility model;
[0027] Figure 4 This is a schematic diagram of the structure of the outer insulating ring and the inner insulating ring in an embodiment of the present invention;
[0028] Figure 5 This is a schematic cross-sectional view of the battery cover plate according to an embodiment of the present utility model. Figure 1 ;
[0029] Figure 6 for Figure 5 A magnified view of a portion of the image;
[0030] Figure 7 This is a schematic cross-sectional view of the battery cover plate according to an embodiment of the present utility model. Figure 2 .
[0031] The annotations in the attached figures are explained as follows:
[0032] 1. Cover plate; 11. Through hole; 12. Annular groove; 2. Inner insulating ring; 21. Stop block; 3. Pressing edge; 31. Groove; 4. Pole post; 5. Sealing ring; 61. Dovetail groove; 62. Protrusion; 71. Stop block; 72. Stop groove; 8. Outer insulating ring; 81. Insert; 811. Barb; 9. Lower plastic; 101. Snap-fit groove; 102. Snap-fit part; A. Cavity. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0034] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.
[0035] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does 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, and therefore should not be construed as limiting the specific protection scope of this utility model.
[0036] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.
[0037] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".
[0038] Please see Figures 1 to 7 .
[0039] This embodiment provides a battery cover structure with strong torsional performance for the terminal post 4, aiming to solve the problems of poor torsional performance and easy wrinkling during riveting of existing battery terminal posts 4; the battery cover structure mainly includes a cover plate 1, an inner insulating ring 2, a sealing ring 5, a cover edge 3, and the terminal post 4; wherein...
[0040] The cover plate 1 has a through hole 11 and an annular groove 12 recessed radially in the through hole 11 for placing the sealing ring 5. The pole post 4 is disposed on the sealing ring 5 and is fixedly connected to the inner insulating ring 2 sleeved on its stepped surface by a first anti-rotation mechanism. In this embodiment, the inner insulating ring 2 can be annular or rectangular, and is installed on the stepped surface of the pole post 4, and is placed above the sealing ring 5 inside the annular groove 12 together with the pole post 4. The first anti-rotation mechanism includes a first mating part disposed on the stepped surface of the pole post 4 and a second mating part disposed on the inner insulating ring 2. The first mating part is configured to be at least one of the parts disposed on the stepped surface. The dovetail groove 61 and the second mating part are configured as at least one protrusion 62 located on the inner circumference of the inner insulating ring 2. The protrusion 62 and the dovetail groove 61 are mutually adapted and engaged. The more dovetail grooves 61 and protrusions 62 are provided, the stronger the connection and locking effect between the pole post 4 and the inner insulating ring 2. That is, the pole post 4 and the inner insulating ring 2 will be connected as one unit. If the pole post 4 or the inner insulating ring 2 is limited to rotation, neither of them can rotate. In other embodiments, the second mating part can also be a protrusion 62 and the first mating part can also be a dovetail groove 61. The structural shape of the first mating part and the second mating part is not limited, as long as it can be connected as one unit.
[0041] The pressure edge 3 extends in the height direction of the cover plate 1 and is annular in structure with a relatively thin thickness; see also Figure 6 When the gland edge 3 is subjected to the vertical downward pressure of the riveting head of the riveting machine, it can fold towards the annular groove 12 to press the inner insulating ring 2 against the sealing ring 5. At this time, the stepped surface of the inner insulating ring 2 and the pole post 4 is limited in the axial direction, and the inner insulating ring 2 will be limited and fixed to the stepped surface and cannot be separated. The gap between the two will also be compressed to the extreme, and the sealing performance will be strengthened. In this embodiment, the gland edge 3 is mainly located on the outer periphery of the annular groove 12, and its inner side wall is installed in cooperation with the outer side wall of the inner insulating ring 2 through the second anti-rotation mechanism to restrict the rotational movement of the inner insulating ring 2. In this way, the circumferential rotation of the inner insulating ring 2 and the pole post 4 will be restricted.
[0042] In this embodiment, the second anti-rotation mechanism includes at least one stop block 71 located on the outer periphery of the inner insulating ring 2 and at least one stop groove 72 located on the inner sidewall of the pressure cap edge 3. The stop blocks 71 and stop grooves 72 are interlocked. The more stop blocks 71 and stop grooves 72 are provided, the stronger the locking effect between the inner insulating ring 2 and the inner sidewall of the pressure cap edge 3, and the less likely the inner insulating ring 2 will rotate. Thus, the pole post 4 will not rotate. Therefore, in this embodiment, the anti-rotation principle of the pole post 4 and the inner insulating ring 2 is as follows: the pole post 4 and the inner insulating ring 2 are locked together by the first anti-rotation mechanism, and then the rotation of the inner insulating ring 2 is restricted by the second anti-rotation mechanism, thereby achieving the purpose of preventing the pole post 4 and the inner insulating ring 2 from rotating.
[0043] In this embodiment, the outer wall of the capping edge 3 has a plurality of radially opening grooves 31. The groove depth of the grooves 31 is less than the thickness of the capping edge 3. If the groove depth of the grooves 31 is equal to the thickness of the capping edge 3, the grooves 31 will penetrate the entire wall surface of the capping edge 3 to form a through opening groove. However, in this embodiment, the groove depth is set to be smaller than the thickness of the capping edge 3, so the grooves 31 will only be recessed a certain distance and will not penetrate the entire capping edge 3.
[0044] In this embodiment, the grooves 31 on the outer wall of the cover edge 3 are mainly perpendicular or inclined to the end face of the cover plate 1, and the grooves 31 are spaced apart in the circumferential direction of the cover edge 3. The grooves 31 are arranged vertically or inclined so that when the rotational force generated during riveting is generated, the rotational force can act perpendicularly on the circumferential direction of the cover edge 3. That is, the rotational force will cause the cover edge 3 to accumulate and deform in the grooves 31, and the rotational force is compatible with the grooves 31. At the same time, the multiple grooves 31 are spaced apart on the cover edge 3, which helps the entire cover edge 3 to deform and accumulate in the grooves 31 when subjected to force, without local wrinkling.
[0045] In this embodiment, the groove 31 extends from the end face of the cover plate 1 to the top face of the pressing edge 3. When the pressing edge 3 is deformed and deposited under rotational force, the pressing edge 3 can be intermittently divided into several modules for material deposition. Conversely, if the groove 31 only needs to extend from the end face of the cover plate 1 to half the height of the pressing edge 3, the extended part will have material deposition, while the unextended part will still have wrinkles. Therefore, the structural design of the groove 31 in this embodiment has a better material deposition effect and a better anti-wrinkle effect.
[0046] In this embodiment, the groove 31 and the stop groove 72 in the second anti-rotation mechanism are misaligned and correspondingly set; in this way, when the groove 31 and the stop groove 72 are recessed on the cover edge 3, the thickness of the cover edge 3 will not be reduced too much, which can effectively ensure the thickness of the cover edge 3, so that the cover edge 3 is not easily deformed automatically under force, and the structural strength is guaranteed.
[0047] In this embodiment, the stop groove 72 extends from the bottom to the top of the cover edge 3; the stop block 71 is arc-shaped and its curvature matches the curvature of the cover edge 3 when it is folded and deformed; when the cover edge 3 is subjected to force and folded and deformed and pressed down onto the stop block 71, the stop groove 72 will also fold and press against the stop block 71 of the inner insulating ring 2, so that the gap between the cover edge 3 and the inner insulating ring 2 can be filled and the contact area between the two is greater.
[0048] In this embodiment, there are two stop grooves 72 arranged symmetrically to each other, and two stop blocks 71 arranged symmetrically to each other; thus, during installation, only one stop block 71 needs to be placed in the stop groove 72 to cooperate with it, and the installation can be completed quickly.
[0049] In this embodiment, see Figure 4 and Figure 6 It also includes an outer insulating ring 8 fitted around the outer periphery of the cap edge 3, with at least one insert 81 located on the inner periphery of the outer insulating ring 8; the top surface of the inner insulating ring 2 has at least two gapped stops 21. When the outer insulating ring 8 is fitted around the outer periphery of the cap edge 3, the inner insulating ring 2 engages with the insert 81 through the gaps between the stops 21; the more inserts 81 and stops 21 there are, the tighter the locking between the outer insulating ring 8 and the inner insulating ring 2. The insert 81 extends radially toward the outer insulating ring 8 to form a barb portion 811, see [reference]. Figure 6 The inner insulating ring 2 forms a cavity A corresponding to the folded part of the cover edge 3. That is, the cavity A is also located between the inner insulating ring 2 and the cover edge 3. When the outer insulating ring 8 is sleeved on the outer periphery of the cover edge 3, the barb part 811 is embedded in the cavity A, so that the outer insulating ring 8 is less likely to fall off.
[0050] In this embodiment, a lower plastic piece 9 is also included. The lower plastic piece 9 is installed on the lower end of the cover plate 1 through a fastening mechanism. The fastening mechanism includes a fastening groove 101 recessed in the annular groove 12 and a fastening part 102 provided on the end face of the lower plastic piece 9. The fastening groove 101 is located on the outer periphery of the through hole 11. The fastening part 102 is engaged in the fastening groove 101 to fit and install the lower plastic piece 9 with the cover plate 1. This ensures the insulation of the pole post 4 and prevents leakage.
[0051] Working principle and usage process of this utility model:
[0052] This utility model illustrates one method of installing a battery cover structure. In the initial state, the pressure edge 3 on the battery cover extends vertically perpendicular to the end face; during assembly:
[0053] First, the sealing ring 5 is placed inside the annular groove 12;
[0054] Second, connect the inner insulating ring 2 to the pole post 4, that is, align each protrusion 62 of the inner insulating ring 2 with each dovetail groove 61 on the stepped surface of the pole post 4, so that the protrusion 62 is correspondingly inserted into the dovetail groove 61 for locking and fitting, thus completing the connection of the inner insulating ring 2 and the pole post 4 into one piece.
[0055] Third, place the pole post 4 together with the inner insulating ring 2 on the upper end of the sealing ring 5, that is, both are located on the inner circumference of the gland edge 3. At the same time, each stop block 71 on the outer circumference of the inner insulating ring 2 corresponds to each stop groove 72 on the inner side wall of the gland edge 3, so as to lock the stop block 71 and the stop groove 72 in a corresponding manner, so that the inner insulating ring 2 and the inner side wall of the gland edge 3 are locked together as one, thus completing the anti-rotation of the inner insulating ring 2 and the pole post 4.
[0056] Fourth, the battery cover can be placed on top of the lower plastic 9 and then fastened and fitted by the fastening groove 101 on the lower plastic 9 and the fastening part 102 on the end face of the lower plastic 9.
[0057] Fifth, the riveting head on the riveting machine can be controlled to move downward. The riveting head acts on the upright pressure plate edge 3, causing the upper part of the pressure plate edge 3 to rotate and deform towards the inner circumference of the annular groove 12. During the deformation process, the pressure plate edge 3 will accumulate circumferentially into the groove 31 on its outer wall. At the same time, the stop groove 72 on the inner wall of the pressure plate edge 3 will also deform and further lock with the stop block 71, resulting in a greater locking force. At this time, the inner insulating ring 2 is less likely to loosen relative to the inner wall of the pressure plate edge 3.
[0058] Sixth, after completing the above assembly, the outer insulating ring 8 can be plastic-coated and placed on the outer periphery of the pressure cover edge 3. During the plastic coating process, the insert 81 formed by the outer insulating ring 8 will be engaged with the inner insulating ring 2 through the gap between each stop 21, and the barb 811 on the insert 81 will enter the cavity A formed by the inner insulating ring 2 and the flipped part of the pressure cover edge 3 for engagement and fixation. At the same time, since the outer insulating ring 8 is plastic-coated, its molten material will also adhere to the inner insulating ring 2 (of the same material) when in contact, further improving the connection and fixation strength between the two and ensuring the sealing performance. Therefore, this utility model, through the setting of the first anti-rotation mechanism and the second anti-rotation mechanism, not only can the integral installation of the terminal post 4 and the battery cover be carried out, ensuring the compactness of the battery cover structure, but also can ensure the circumferential positioning of the terminal post 4. The sealing performance between the terminal post 4 and the sealing ring 5 is excellent, the electrolyte is not easy to seep out from the through hole 11, and it is not easy to rotate under torque in the later stage, with extremely strong torque performance. In addition, in the battery cover structure of this utility model, several grooves 31 are set on the outer wall of the cover edge 3. When the riveting head of the riveting machine acts on the cover edge 3 and drives it to fold, the cover edge 3 can accumulate material into the groove 31, without the entire cover edge 3 deforming and wrinkling. Secondly, the groove depth of the groove 31 is less than the thickness of the cover edge 3, rather than a through slot. In this way, the strength of the cover edge 3 is guaranteed to a certain extent, and it is not easy to deform on its own under impact, thus affecting the sealing performance of the battery cover.
[0059] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.
Claims
1. A battery cover structure with strong torsional performance for the terminal post, characterized in that: The battery cover structure includes a cover plate, an inner insulating ring, a sealing ring, a cover edge, and a terminal post; wherein, the cover plate has a through hole and an annular groove offset radially from the through hole for placing the sealing ring; the terminal post is disposed on the sealing ring and is fixedly connected to the inner insulating ring sleeved on its stepped surface through a first anti-rotation mechanism. The pressure cap edge extends in the height direction of the cover plate and can be folded towards the annular groove under force to press the inner insulating ring against the sealing ring; the pressure cap edge is located on the outer periphery of the annular groove, and its inner sidewall is fitted with the outer sidewall of the inner insulating ring through a second anti-rotation mechanism to restrict the rotational movement of the inner insulating ring; the pressure cap edge has a plurality of radially opening grooves on its outer sidewall, and the depth of the grooves is less than the thickness of the pressure cap edge.
2. The battery cover structure with strong torsional performance of the electrode post as described in claim 1, characterized in that: Each of the grooves is perpendicular or inclined to the end face of the cover plate, and the grooves are spaced apart in the circumferential direction of the cover edge.
3. The battery cover structure with strong torsional performance of the electrode post as described in claim 2, characterized in that: The groove extends from the end face of the cover plate to the top face of the pressure plate edge.
4. The battery cover structure with strong torsional performance of the electrode post as described in claim 2, characterized in that: The groove is offset from and corresponds to the second anti-rotation mechanism.
5. The battery cover structure with strong torsional performance of the electrode post as described in claim 4, characterized in that: The second anti-rotation mechanism includes at least one stop block located on the outer periphery of the inner insulating ring and at least one stop groove located on the inner sidewall of the pressure cap edge. The stop block and the stop groove are engaged and installed; wherein the stop groove and the groove are misaligned and corresponding.
6. The battery cover structure with strong torsional performance of the electrode post as described in claim 5, characterized in that: The stop groove is provided in two symmetrical positions, and the stop groove extends from the bottom to the top of the cover edge; the stop block is provided in two symmetrical positions, the stop block is arc-shaped, and its arc is adapted to the arc of the cover edge folding and deforming.
7. A battery cover structure with strong torsional performance for electrode posts as described in any one of claims 1 to 6, characterized in that: The first anti-rotation mechanism includes a first mating part disposed on the stepped surface of the pole post and a second mating part disposed on the inner insulating ring. The first mating part is configured as at least one dovetail groove disposed on the stepped surface, and the second mating part is configured as at least one protrusion disposed on the inner circumference of the inner insulating ring. The protrusion and the dovetail groove are mutually adapted and engaged.
8. A battery cover structure with strong torsional performance for electrode posts as described in any one of claims 1 to 6, characterized in that: It also includes an outer insulating ring fitted around the outer periphery of the cap edge, the outer insulating ring having at least one insert at its inner periphery; the top surface of the inner insulating ring has at least two gap-set blocks, and when the outer insulating ring is fitted around the outer periphery of the cap edge, the inner insulating ring engages with the insert through the gap between each of the blocks.
9. The battery cover structure with strong torsional performance of the electrode post as described in claim 8, characterized in that: The insert extends radially toward the outer insulating ring to form a barb portion, and the inner insulating ring forms a cavity corresponding to the folded portion of the pressure cap edge. When the outer insulating ring is fitted onto the outer periphery of the pressure cap edge, the barb portion is engaged in the cavity.
10. The battery cover structure with strong torsional performance of the electrode post as described in claim 1, characterized in that: It also includes a lower plastic piece, which is installed on the lower end of the cover plate by a fastening mechanism; the fastening mechanism includes a fastening groove recessed on the annular groove and a fastening part provided on the end face of the lower plastic piece, the fastening groove being located on the outer periphery of the through hole; the fastening part is engaged in the fastening groove to fit and install the lower plastic piece with the cover plate.