Sealing cover, battery and energy storage equipment
By using the alignment boss positioning seal ring and positioning ring limit pole design in the battery cover, the problem of the seal ring displacement and the pole position of the pole is easily solved, and higher sealing and safety are achieved.
Patent Information
- Application Number
- CN202421404585.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-06-18
AI Technical Summary
In traditional battery packaging methods, the sealing ring is easily displaced and the pole column is easily positioned poorly, resulting in seal failure, electrolyte leakage, short circuit risk and low voltage breakdown performance, affecting battery performance and safety.
The sealing design is adopted that includes a cover assembly, a conductive assembly and a protective positioning assembly. The sealing ring is positioned by the alignment boss and the positioning ring limit the pole column to ensure the position and compression of the sealing ring, fix the pole column position, and avoid the risk of seal failure and short circuit.
Effectively prevent sealing ring displacement and poor position of the pole column, improve sealing, prevent electrolyte leakage, enhance battery safety factor, and improve voltage breakdown performance.
Smart Images
Figure CN222953203U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of batteries, in particular to a sealing cover, a battery and an energy storage device. Background Art
[0002] In recent years, the rapid development of the battery industry has driven the urgent need for innovation in battery packaging technology. Traditional battery packaging methods mostly rely on a single sealing element and a simple structural design, such as using a sealing ring for simple compression sealing. Although this method is low-cost, it is prone to sealing failure under complex working conditions, especially under high temperature, high pressure or long-term vibration environments. The sealing ring is prone to displacement, resulting in electrolyte leakage, affecting battery performance and safety.
[0003] Furthermore, the poles are prone to misalignment or tilt during processing, and misalignment may lead to incomplete sealing, allowing the electrolyte to penetrate into areas that should not contact the electrodes, causing short circuit risks and reducing the safety factor of the battery. In addition, poor positioning of the poles may also cause part of the pole to be too close to the position where insulation should be maintained, resulting in too low voltage breakdown performance at the position where the gap is too narrow, seriously affecting the safety factor of the product. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a sealing cover, a battery and an energy storage device, which can solve the problems of easy displacement of the sealing ring and poor positioning of the pole.
[0005] The first aspect of the utility model provides a sealing cover, which comprises:
[0006] A cover assembly, the cover assembly comprising a cover body and a bracket, the cover body is provided with a mounting groove, the bottom of the mounting groove is provided with an alignment boss and a first mounting hole, the bracket is provided with a second mounting hole, the bracket is connected to the cover body, and the first mounting hole is aligned and communicated with the second mounting hole;
[0007] A conductive component, the conductive component comprising a pole, the pole being disposed in the mounting groove; and
[0008] The protective positioning component includes a positioning ring and a sealing ring. The positioning ring and the sealing ring are respectively arranged in the installation groove. The positioning ring is sleeved on the bottom outer peripheral edge of the pole. The sealing ring is inserted into the alignment boss, and the sealing ring is supported on the pole.
[0009] Preferably, the cover also includes a fixing component, which includes a pull ring and an injection molded part. The pull ring is arranged in the installation groove, and the injection molded part is arranged on the cover body. The injection molded part is respectively connected to the pull ring and the pole, and the injection molded part is supported on the pole.
[0010] Preferably, the pull ring, the pole and the positioning ring jointly define a molding interval, and at least a portion of the injection-molded part is injection-molded in the molding interval.
[0011] Preferably, a avoidance groove is further provided on the cover body, the pull ring is arranged in the avoidance groove, the bottom of the pull ring extends outward and fits the groove wall of the avoidance groove, and a transverse bending portion is provided on the top of the pull ring, and the transverse bending portion is located in the injection molded part.
[0012] Preferably, at least one limiting groove is provided on the periphery of the pole, at least one limiting column is integrally formed on the injection molded part, the limiting column is correspondingly inserted into the limiting groove, and the limiting column is adapted to the limiting groove; and / or
[0013] A positioning hole is formed on the pull ring, and a positioning protrusion is integrally formed on the injection molded part, and the positioning protrusion is inserted into the positioning hole.
[0014] Preferably, the sealing ring is provided with an alignment groove, and the alignment boss is inserted into the alignment groove, so that the alignment boss abuts against the inner wall surface of the alignment groove; and / or
[0015] The inner peripheral edge of the alignment boss is aligned with the hole wall of the first mounting hole.
[0016] Preferably, a clamping boss is provided on the hole wall of the first mounting hole, and a buckle is provided on the bracket. The buckle is inserted into the first mounting hole and clamped on the clamping boss.
[0017] Preferably, a reinforcing boss is provided on the cover body, and the reinforcing boss extends and is exposed in the alignment boss to form the clamping boss;
[0018] The bracket is provided with an installation avoidance groove, and the reinforcing boss is inserted into the installation avoidance groove.
[0019] The second aspect of the utility model provides a battery, which includes a shell, a battery cell, a connecting piece and the cover described in any one of the above technical solutions, wherein the cover is arranged on the shell, the battery cell and the connecting piece are arranged in the shell, and the connecting piece is respectively connected to the battery cell and the pole.
[0020] The third aspect of the utility model provides an energy storage device, which includes a cabinet and a plurality of energy storage boxes. The batteries in the above technical solution are arranged in the energy storage boxes, and each of the energy storage boxes is arranged in the cabinet.
[0021] The implementation of this utility model has the following beneficial effects:
[0022] The utility model relates to a sealing cover, a battery and an energy storage device, wherein the energy storage device is provided with a battery, and the battery is provided with a sealing cover. On the sealing cover, on the one hand, the sealing ring is positioned by an alignment boss, so as to accurately position and fix the sealing ring, and on the other hand, the pole is limited and fixed by a positioning ring to avoid excessive compression of the sealing ring; in this way, the position and compression amount of the sealing ring are effectively limited, thereby ensuring the sealing performance of the sealing ring, thereby effectively preventing leakage and improving the safety factor of the product;
[0023] In addition, the positioning ring is positioned through the installation groove, and then the pole is positioned through the positioning ring, so that the relative position of the pole and the cover can be fixed, so that each position of the pole can maintain a sufficient distance from the position that needs to be isolated, thereby ensuring the voltage breakdown resistance performance of each position, and further improving the safety factor of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.
[0025] Figure 1 It is a schematic diagram of the structure of the cover in some embodiments of the utility model;
[0026] Figure 2 yes Figure 1 an exploded view of the cover shown;
[0027] Figure 3 From another perspective Figure 2 an exploded view of the cover shown;
[0028] Figure 4 It is a schematic diagram of the internal structure of the cover in some embodiments of the utility model;
[0029] Figure 5 yes Figure 4 Enlarged view at A.
[0030] Figure ID:
[0031] 10-Capping;
[0032] 1-cover assembly; 11-cover body; 111-mounting groove; 112-aligning boss; 113-first mounting hole; 116-clamping boss; 114-avoiding groove; 115-reinforcement boss; 12-bracket; 121-second mounting hole; 122-buckle; 123-mounting avoidance groove;
[0033] 2-conductive component; 21-pole; 211-limiting groove;
[0034] 3-protection positioning assembly; 31-positioning ring; 32-sealing ring; 321-alignment groove;
[0035] 4-fixing assembly; 41-pull ring; 411-lateral bending portion; 412-positioning hole; 42-injection molded part; 421-limiting column; 422-positioning protrusion;
[0036] 5-Molding interval. DETAILED DESCRIPTION
[0037] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.
[0038] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0039] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0040] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integrated 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 this utility model can be understood according to specific circumstances.
[0041] Figure 1 The cover 10 in some embodiments of the present invention is shown, and the cover 10 plays a role of packaging.
[0042] like Figure 1 and Figure 2 As shown, the cover 10 includes a covering component 1 , a conductive component 2 and a protective positioning component 3 , and the conductive component 2 and the protective positioning component 3 are both disposed on the cover body 11 .
[0043] It can be understood that the covering component 1 plays a role of packaging, and also plays a role of installing the conductive component 2 and the protective positioning component 3. The conductive component 2 is used to transfer electrical energy. The protective positioning component 3 plays a protective role.
[0044] like Figures 2 to 5 As shown, the cover assembly 1 includes a cover body 11 and a bracket 12. The cover body 11 is provided with a mounting groove 111. The bottom of the mounting groove 111 is provided with a positioning boss 112 and a first mounting hole 113. The bracket 12 is provided with a second mounting hole 121 (as shown in FIG. Figure 2 As shown), the bracket 12 is connected to the cover body 11, and the first mounting hole 113 is aligned and connected with the second mounting hole 121.
[0045] like Figures 2 to 5 As shown, the conductive component 2 includes a pole 21, which is disposed in the mounting groove 111. The protective positioning component 3 includes a positioning ring 31 and a sealing ring 32, which are respectively disposed in the mounting groove 111, the positioning ring 31 is sleeved on the bottom outer peripheral edge of the pole 21, the alignment boss 112 is inserted with the sealing ring 32, and the sealing ring 32 is held against the pole 21.
[0046] It can be understood that the cover 11 and the bracket 12 play a role of packaging protection together. The mounting groove 111 is used to mount the pole 21 and the sealing ring 32. The alignment and communication of the first mounting hole 113 and the second mounting hole 121 enable the pole 21 to be connected and conducted with the connecting piece, so that the pole 21 can transmit current. The alignment boss 112 is used to insert and position the sealing ring 32, thereby fixing the position of the sealing ring 32 in the mounting groove 111.
[0047] The positioning ring 31 is used to position the pole 21, thereby fixing the position of the pole 21 in the mounting groove 111. The sealing ring 32 is used to seal the matching gap between the pole 21 and the cover 11 to prevent liquid from passing through the matching gap and ensure sealing.
[0048] It should be noted that, for the sealing ring 32, the setting position of the sealing ring 32 is fixed by inserting the alignment boss 112, preventing the sealing ring 32 from being offset in the installation groove 111, and ensuring the sealing performance of the sealing ring 32; the compression of the sealing ring 32 is generated by the pressure of the pole 32, so that the compressed sealing ring 32 can be sealed. At the same time, the setting of the positioning ring 31 can also limit the downward pressure of the pole 21, preventing the pole 21 from over-compressing the sealing ring 32, resulting in sealing failure or even damage to the sealing ring 32. In this way, the sealing ring 32 can be effectively and long-term sealed.
[0049] For the pole 21, the setting position of the pole 21 is fixed by the positioning ring 31, and the positioning ring 31 is fixed by being set in the installation groove 111, so that the position of the pole 21 in the installation groove 111 is also fixed, thereby ensuring that the distance between the conductive pole 21 and the parts that need to be insulated is constant, ensuring that the distance can ensure sufficient distance required for voltage breakdown resistance.
[0050] like Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments of the cover 10, the cover 10 also includes a fixing component 4, the fixing component 4 includes a pull ring 41 and an injection molded part 42, the pull ring 41 is arranged in the installation groove 111, the injection molded part 42 is arranged on the cover body 11, the injection molded part 42 is respectively connected to the pull ring 41 and the pole 21, and the injection molded part 42 is supported on the pole 21.
[0051] It can be understood that the fixing assembly 4 is used to fix the pole 21. The pull ring 41 is arranged in the mounting groove 111, and the injection molded part 42 is connected to the pull ring 41, the pole 21 and the cover 11 at the same time, so that the pull ring 41 fixes the position of the injection molded part 42, so that the injection molded part 42 can maintain the support of the pole 21, thereby ensuring the sealing performance.
[0052] like Figure 5 As shown, in some embodiments of the cover 10 , the pull ring 41 , the pole 21 and the positioning ring 31 together define a molding interval 5 , and at least a portion of the injection molded part 42 is injection molded in the molding interval 5 .
[0053] It can be understood that the injection molded part 42 is directly injected into the molding interval 5 by injection molding. In this way, the injection molded part 42 can make sufficiently close contact with the pole 21 and the pull ring 41, greatly reducing the fitting clearance between the injection molded part 42 and the pull ring 41 and between the injection molded part 42 and the pole 21, thereby avoiding the position displacement of the pole 21 due to excessive fitting clearance.
[0054] like Figure 2 As shown, in some embodiments of the cover 10, a avoidance groove 114 is further provided on the cover body 11, and the pull ring 41 is arranged in the avoidance groove 114, the bottom of the pull ring 41 extends outward and fits the groove wall of the avoidance groove 114, and a transverse bending portion 411 is provided on the top of the pull ring 41, and the transverse bending portion 411 is located in the injection molded part 42.
[0055] It can be understood that the avoidance groove 114 provides a special space for the installation of the pull ring 41, ensuring that the pull ring 41 can be firmly set on the cover body 11 without interfering with the normal installation and operation of other components or parts. The bottom of the pull ring 41 is designed to extend outward and fit closely to the groove wall of the avoidance groove 114, which strengthens the fixing effect of the pull ring, prevents the pull ring 41 from moving or falling off during use, and thus improves the position stability of the pole 21.
[0056] The provision of the transverse bending portion 411 increases the contact area between the pull ring 41 and the injection molded part 42, and improves the connection strength between the two. At the same time, the transverse extension direction of the transverse bending portion 411 cooperates with the injection molded part 42 to bear the force in the longitudinal direction, that is, the force in the longitudinal direction can be supported by the transverse bending portion 411, thereby improving the durability of the product.
[0057] It should be noted that in this type of implementation, the pull ring 41 and the groove wall of the avoidance groove 114 can be configured to be welded, bonded or various connection methods in related technologies.
[0058] like Figure 2 and Figure 3 As shown, in some embodiments of the cover 10, at least one limiting groove 211 is opened on the periphery of the pole 21, and at least one limiting column 421 is integrally formed on the injection molded part 42. The limiting column 421 is correspondingly inserted into the limiting groove 211, and the limiting column 421 is adapted to the limiting groove 211.
[0059] It is understandable that the limiting post 421 can be configured to be directly formed on the injection molded part 42 during the injection molding process. In this way, if the injection molded part 42 is directly injection molded on the pole 21 , the limiting post 421 will also be directly injection molded in the limiting groove 211 .
[0060] It should be noted that, since the limiting column 421 is correspondingly inserted into the limiting groove 211 , the position of the pole 21 is further confirmed, thereby preventing the pole 21 from accidentally rotating and improving the setting stability of the pole 21 .
[0061] like Figure 3 As shown, in some embodiments of the cover 10 , a positioning hole 412 is formed on the pull ring 41 , and a positioning protrusion 422 is integrally formed on the injection molded part 42 , and the positioning protrusion 422 is inserted into the positioning hole 412 .
[0062] It can be understood that the insertion and cooperation between the positioning protrusion 422 and the positioning hole 412 can locate the relative positions of the pull ring 41 and the injection molded part 42, increase the connection stability between the two, and further prevent the occurrence of positional deviation.
[0063] like Figure 2 and Figure 3 As shown, in some embodiments of the cover 10 , an alignment groove 321 is formed on the sealing ring 32 , and the alignment boss 112 is inserted into the alignment groove 321 , so that the alignment boss 112 abuts against the inner wall surface of the alignment groove 321 .
[0064] It can be understood that by providing the alignment groove 321 on the sealing ring 32 to cooperate with the alignment boss 112 on the cover body 11, the sealing ring is accurately positioned and securely installed. The size and shape of the alignment groove 32 match the alignment boss 112. When assembling the cover 10, the alignment boss 112 can be accurately inserted into the alignment groove 321 of the sealing ring 32, ensuring that the sealing ring will not be offset during the installation process, and the tight fit between the boss and the groove wall provides additional support force to prevent the sealing ring from excessively deforming or moving when under pressure.
[0065] It should be noted that the mutual abutment between the alignment boss 112 and the alignment groove 321 can also extend the liquid seepage path, that is, seal over a longer stroke to prevent liquid seepage.
[0066] like Figure 5 As shown, in some embodiments of the cover 10 , the inner peripheral edge of the alignment boss 112 is aligned with the hole wall of the first mounting hole 113 .
[0067] It can be understood from the contents of this embodiment that after the sealing ring 32 is disposed on the alignment boss 112 , the sealing ring 32 can extend linearly to the hole wall of the first mounting hole 113 , thereby extending the effective sealing distance of the sealing ring 32 .
[0068] like Figure 2 and Figure 5As shown, in some embodiments of the cover 10 , a clamping boss 116 is provided on the hole wall of the first mounting hole 113 , and a buckle 122 is provided on the bracket 12 . The buckle 122 is inserted into the first mounting hole 113 and clamped on the clamping boss 116 .
[0069] It can be understood that the clamping boss 116, as a fixed reinforcement structure, can form a stable interlocking structure with the buckle 122 on the bracket 12. During the assembly process, the buckle 122 is inserted into the first mounting hole 113 and precisely docked with the clamping boss 116 through its outer contour. Once the buckle 122 is fully in place, it will be clamped to the clamping boss to form a strong and non-loose connection, and no additional fasteners such as screws are required to ensure a stable connection between the bracket 12 and the cover body 11. The assembly production efficiency is greatly accelerated.
[0070] It should be noted that if the sealing ring 32 is configured to be partially in close contact with the hole wall of the first mounting hole 113, the correctly assembled sealing ring 32 and the aligned buckle 122 are configured to be non-contacting with each other to prevent the buckle 122 from holding the sealing ring 32 and causing sealing failure.
[0071] like Figure 3 and Figure 5 As shown, in some embodiments of the cover 10, a reinforcing boss 115 is provided on the cover body 11, and the reinforcing boss 115 extends and is exposed in the alignment boss 112 to form a clamping boss 116; an installation avoidance groove 123 is opened on the bracket 12, and the reinforcing boss 115 is inserted into the installation avoidance groove 123.
[0072] It can be understood that the provision of the reinforcing boss 115 reinforces the clamping boss 116, prevents the clamping boss 116 from being directly dropped due to excessive force, and increases the connection strength between the clamping boss 116 and the cover body 11 as much as possible.
[0073] The battery of the utility model can be various batteries in the related art. The battery includes a shell, a battery cell, a connecting piece and a cover 10, the cover 11 is covered on the shell, the battery cell and the connecting piece are arranged in the shell, and the connecting piece connects the battery cell and the pole 21 respectively. It can be understood that the shell and the cover 11 play the role of accommodating the battery cell together. The connecting piece is made of a conductive material, and the connecting piece is used to conduct the battery cell and the pole 21.
[0074] The energy storage device of the utility model includes a cabinet and a plurality of energy storage boxes, wherein batteries are arranged in the energy storage boxes, and each energy storage box is arranged in the cabinet. It can be understood that the number of batteries in the energy storage box can be flexibly set, and the energy storage device can be applied to various scenes or fields with energy storage requirements.
[0075] The implementation of this utility model has the following beneficial effects:
[0076] The utility model relates to a sealing cover, a battery and an energy storage device, wherein the energy storage device is provided with a battery, and the battery is provided with a sealing cover. On the sealing cover, on the one hand, the sealing ring is positioned by an alignment boss, so as to accurately position and fix the sealing ring, and on the other hand, the pole is limited and fixed by a positioning ring to avoid excessive compression of the sealing ring; in this way, the position and compression amount of the sealing ring are effectively limited, thereby ensuring the sealing performance of the sealing ring, thereby effectively preventing leakage and improving the safety factor of the product;
[0077] In addition, the positioning ring is positioned through the installation groove, and then the pole is positioned through the positioning ring, so that the relative position of the pole and the cover can be fixed, so that each position of the pole can maintain a sufficient distance from the position that needs to be isolated, thereby ensuring the voltage breakdown resistance performance of each position, and further improving the safety factor of the product.
[0078] The scheme of the utility model has been described in detail above with reference to the accompanying drawings. In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. Those skilled in the art should also know that the actions and modules involved in the specification are not necessarily required for the utility model. In addition, it can be understood that the steps in the method of the embodiment of the utility model can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the utility model can be merged, divided and deleted according to actual needs.
[0079] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A cover, characterized in that: include: A cover assembly (1) comprises a cover body (11) and a bracket (12); the cover body (11) is provided with a mounting groove (111); the bottom of the mounting groove (111) is provided with an alignment boss (112) and a first mounting hole (113); the bracket (12) is provided with a second mounting hole (121); the bracket (12) is connected to the cover body (11); the first mounting hole (113) is aligned and communicated with the second mounting hole (121); A conductive component (2) comprising a pole (21), wherein the pole (21) is arranged in the mounting groove (111); and The protective positioning assembly (3) comprises a positioning ring (31) and a sealing ring (32), wherein the positioning ring (31) and the sealing ring (32) are respectively arranged in the mounting groove (111), the positioning ring (31) is sleeved on the bottom outer peripheral edge of the pole (21), the sealing ring (32) is inserted into the alignment boss (112), and the sealing ring (32) is held against the pole (21).
2. The cover according to claim 1, characterized in that The cover also includes a fixing assembly (4), the fixing assembly (4) including a pull ring (41) and an injection molded part (42), the pull ring (41) being arranged in the mounting groove (111), the injection molded part (42) being arranged on the cover body (11), the injection molded part (42) being respectively connected to the pull ring (41) and the pole (21), and the injection molded part (42) being supported on the pole (21).
3. The cover according to claim 2, characterized in that: The pull ring (41), the pole (21) and the positioning ring (31) jointly define a molding interval (5), and at least a portion of the injection molded part (42) is injection molded in the molding interval (5).
4. The closure according to claim 2 or 3, characterized in that: The cover body (11) is also provided with a position-avoiding groove (114), the pull ring (41) is arranged in the position-avoiding groove (114), the bottom of the pull ring (41) extends outward and fits the groove wall of the position-avoiding groove (114), and the top of the pull ring (41) is provided with a transverse bending portion (411), and the transverse bending portion (411) is located in the injection molded part (42).
5. The closure according to claim 2 or 3, characterized in that: At least one limiting groove (211) is provided on the periphery of the pole (21), at least one limiting column (421) is integrally formed on the injection molded part (42), the limiting column (421) is correspondingly inserted into the limiting groove (211), and the limiting column (421) is adapted to the limiting groove (211); and / or The pull ring (41) is provided with a positioning hole (412), and the injection molded part (42) is integrally formed with a positioning protrusion (422), and the positioning protrusion (422) is inserted into the positioning hole (412).
6. The cover according to claim 1, characterized in that The sealing ring (32) is provided with an alignment groove (321), and the alignment boss (112) is inserted into the alignment groove (321), so that the alignment boss (112) abuts against the inner wall surface of the alignment groove (321); and / or The inner peripheral edge of the alignment boss (112) is aligned with the hole wall of the first mounting hole (113).
7. The cover according to claim 1, characterized in that A clamping boss (116) is provided on the hole wall of the first mounting hole (113), and a buckle (122) is provided on the bracket (12); the buckle (122) is inserted into the first mounting hole (113) and clamped on the clamping boss (116).
8. The cover according to claim 7, characterized in that The cover body (11) is provided with a reinforcing boss (115), and the reinforcing boss (115) extends and is exposed in the alignment boss (112) to form the clamping boss (116); The bracket (12) is provided with an installation avoidance groove (123), and the reinforcing boss (115) is inserted into the installation avoidance groove.
9. A battery, characterized in that: The battery comprises a shell, a battery cell, a connecting piece and a cover as claimed in any one of claims 1 to 8, wherein the cover (11) is covered on the shell, the battery cell and the connecting piece are arranged in the shell, and the connecting piece is respectively connected to the battery cell and the pole (21).
10. An energy storage device, characterized in that: The energy storage device includes a cabinet and a plurality of energy storage boxes, wherein the batteries according to claim 9 are arranged in the energy storage boxes, and each of the energy storage boxes is arranged in the cabinet.