Reverse riveting battery module with top-mounted sealing ring

Abstract

The utility model relates to the technical field of battery modules, in particular to a reverse riveting battery module with an upper sealing ring, which comprises a plurality of battery units, an outer frame is integrally mounted outside the battery units, an inner top cover covers the top of the outer frame, an outer top cover is arranged at the top of the inner top cover, and a sealing ring is arranged on the outer top cover. A plurality of groups of symmetrically distributed movable openings are formed in the inner top cover, pressing blocks are arranged in the movable openings, rubber rings corresponding to the positions of pole columns at the tops of the battery units are arranged at the bottoms of the pressing blocks, and first rivets are symmetrically inserted in the positions, corresponding to the movable openings, of the outer top cover in a penetrating mode; an inner boss is arranged on the edge of the top end of the outer frame, and outer bosses connected with the inner boss in a clamped mode are arranged on the two sides of the inner top cover. According to the reverse riveting battery module arranged on the sealing ring, the sealing reliability is effectively improved, pollutants such as moisture and dust are prevented from entering, and safe and long-term operation of a battery under complex working conditions is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a reverse-rivet battery module with a sealing ring disposed on it. Background Art

[0002] A battery module refers to a battery module containing several battery cells. It is essentially a bracket system consisting of a casing, a battery cell, a terminal cover and other parts. They are combined together to form an integral battery pack, providing a modular and scalable solution for the battery system. It is widely used in electric vehicles, energy storage systems, portable electronic devices and other fields.

[0003] During the packaging process of existing battery modules, the sealing method mostly adopts a bottom sealing ring. This method has the problem of insufficient sealing reliability when facing complex working conditions, such as high temperature, high pressure, vibration or long-term outdoor exposure. Poor sealing can easily lead to moisture and dust intrusion into the battery, causing short circuits, corrosion of electrode materials, reduced battery performance, and even safety problems such as battery swelling, leakage or thermal runaway, which seriously affect the safety and service life of the battery. Utility Model Content

[0004] The purpose of the utility model is to provide a reverse-rivet battery module with an upper sealing ring, so as to solve the problem of a lower sealing ring design commonly used in current battery module packaging proposed in the above-mentioned background technology. This method has the problem of insufficient sealing reliability under complex working conditions, and further allows moisture and dust to invade the interior of the battery, affecting the safety and service life of the battery.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reverse-rivet battery module with a sealing ring on top, comprising a battery cell, wherein the battery cell is evenly provided with a plurality of outer frames installed as a whole on the outside, the top of the outer frame is covered with an inner top cover, the top of the inner top cover is provided with an outer top cover, and the inner top cover is provided with a plurality of groups of symmetrically distributed movable openings, a pressure block is provided inside the movable opening, a rubber ring corresponding to the position of the top pole of the battery cell is provided at the bottom of the pressure block, and the first rivets are symmetrically inserted at the positions of the outer top cover corresponding to the movable openings, and the top edge of the outer frame is provided with an inner boss, and both sides of the inner top cover are provided with outer bosses that are clamped with the inner bosses.

[0006] Preferably, both sides of the top of the pressing block are provided with rivet interfaces, and the rivet interfaces correspond to the positions of the first rivets.

[0007] Preferably, a plurality of groups of elastic blocks are provided on the inner wall of the outer top cover, and the positions of the elastic blocks and the pressing blocks correspond one to one.

[0008] Preferably, both sides of the outer top cover are connected with second rivets, and both the inner boss and the outer boss are provided with positioning holes matching with the second rivets.

[0009] Preferably, an inner sealing gasket is bonded and fixed to the inner wall of the outer boss, and an embedding groove matching the structure of the inner sealing gasket is provided on the outer wall of the inner boss.

[0010] Preferably, an outer sealing gasket is bonded and fixed to the inner wall of the bottom end of the outer top cover, and the outer sealing gasket is located below the second rivet.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the reverse-rivet battery module with the sealing ring on top effectively improves the sealing reliability, prevents the entry of pollutants such as moisture and dust, and ensures the safety and long-term operation of the battery under complex working conditions. The reverse-rivet battery module with the sealing ring on top is provided with a double-layer inner top cover and an outer top cover on the top of the battery unit. The outer top cover can drive the pressing block to move vertically under the action of the first rivet and make the rubber ring press-fit and sleeve on the outside of the top pole of the battery unit. When the inner top cover is covered on the top of the outer frame, the inner boss and the outer boss can cooperate to form a dislocation snap fit, and then the second rivet is used to position the whole, so as to achieve a good sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a reverse-rivet battery module with a sealing ring placed on top of the utility model;

[0013] Figure 2 The utility model is a reverse riveted battery module with a sealing ring placed on the top Figure 1 The enlarged structural diagram at A in the middle;

[0014] Figure 3 The utility model is a schematic diagram of the assembly structure of an outer frame, an inner top cover and an outer top cover of a reverse-rivet battery module with a sealing ring placed on it.

[0015] In the figure: 1. battery cell; 2. outer frame; 3. inner top cover; 4. outer top cover; 5. movable opening; 6. pressure block; 7. rubber ring; 8. first rivet; 9. rivet interface; 10. elastic block; 11. inner boss; 12. outer boss; 13. second rivet; 14. inner sealing gasket; 15. outer sealing gasket. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-3The utility model provides a technical solution: a reverse riveted battery module with a sealing ring on top, comprising a battery cell 1, wherein the battery cell 1 is evenly provided with a plurality of outer frames 2 installed on the outside as a whole, the top of the outer frame 2 is covered with an inner top cover 3, the top of the inner top cover 3 is provided with an outer top cover 4, and the inner top cover 3 is provided with a plurality of groups of symmetrically distributed movable openings 5, the inside of the movable opening 5 is provided with a pressing block 6, the outer edge of the pressing block 6 is slidably connected with the inner wall of the movable opening 5, the bottom of the pressing block 6 is provided with a rubber ring 7 corresponding to the position of the top pole of the battery cell 1, and the positions corresponding to the outer top cover 4 and the movable opening 5 are symmetrically interspersed with first rivets 8, and the top edge of the outer frame 2 is provided with an inner boss 11, the inner boss 11 is an integral structure with the outer frame 2, and both sides of the inner top cover 3 are provided with a boss 1 1-phase snap-fitted outer boss 12, the outer boss 12 and the inner top cover 3 are an integrated structure. When the battery unit 1 of this structure is placed inside the outer frame 2, the inner top cover 3 and the outer top cover 4 can be installed on the top respectively, and the outer top cover 4 can be connected to a plurality of first rivets 8 to press the pressure block 6. When the pressure block 6 is subjected to force, it can move vertically inside the movable opening 5 to drive the rubber ring 7 to be pressed and sleeved on the outside of the top pole of the battery unit 1. At the same time, when the inner top cover 3 is covered on the top of the outer frame 2, the inner boss 11 can cooperate with the outer boss 12 to form a staggered snap fit to achieve a good sealing effect. This structural design of the upper sealing ring combined with the reverse riveting technology can overcome the limitations of the lower sealing ring of the traditional battery module, improve the sealing reliability of the battery module, and prevent pollutants such as moisture and dust. Enter, to ensure the safety and long-term operation of the battery under complex working conditions, both sides of the top of the pressure block 6 are provided with rivet interfaces 9, and the rivet interfaces 9 correspond to the position of the first rivet 8. The inner end of the first rivet 8 of this structure can be extended into the inside of the rivet interface 9 for positioning, so as to ensure the accuracy of the position of the first rivet 8 during the riveting process and keep it stable. Several groups of elastic blocks 10 are bonded and fixed to the inner wall of the outer top cover 4, and the positions of the elastic blocks 10 and the pressure blocks 6 correspond one by one. The outer top cover 4 of this structure can synchronously drive the elastic blocks 10 to squeeze on the pressure block 6 when covering, which is conducive to improving the stability of the pressure block 6 when driving the rubber ring 7 to press together. Second rivets 13 are connected to both sides of the outer top cover 4, and the inner boss 11 and the outer boss 12 are provided with Positioning hole, the second rivet 13 of this structure can be riveted by extending into the positioning holes of the inner boss 11 and the outer boss 12 to quickly complete the overall positioning of the inner top cover 3 and the outer top cover 4, the inner wall of the outer boss 12 is bonded and fixed with an inner sealing gasket 14, and the outer wall of the inner boss 11 is provided with an embedding groove that matches the structure of the inner sealing gasket 14, the outer boss 12 of this structure can further ensure the sealing of the inner top cover 3 on the top of the outer frame 2 by squeezing the inner sealing gasket 14 into the embedding groove on the outer wall of the inner boss 11, the outer sealing gasket 15 is bonded and fixed on the inner wall of the bottom end of the outer top cover 4, and the outer sealing gasket 15 is located below the second rivet 13, the outer top cover 4 of this structure can be covered by fitting the outer sealing gasket 15 to the corresponding positions of the outer boss 12 and the outer frame 2 when covering,This forms a double-layer seal with the inner sealing gasket 14, so that the top sealing effect of the battery module is better.

[0018] Working principle: When using the reverse-rivet battery module with the sealing ring on top, first, when several battery cells 1 are placed in the inner part of the outer frame 2 and the top needs to be sealed after preliminary positioning, the inner top cover 3 is first covered on the top of the outer frame 2. When the inner top cover 3 is covered, the inner boss 11 and the outer boss 12 can cooperate to form a staggered snap fit, and the outer boss 12 will simultaneously squeeze the inner sealing gasket 14 into the groove on the outer wall of the inner boss 11, and then the outer top cover 4 is covered on the top of the inner top cover 3 as a whole. During the covering process, the outer top cover 4 will drive the elastic block 10 to squeeze the pressing block 6. At the same time, several first rivets 8 are connected to the outer top cover 4. The inner end of the first rivet 8 can be extended into the inside of the rivet interface 9 for positioning. The first rivet 8 During the riveting process, the inner end will press against the pressure block 6. At this time, the pressure block 6 can move vertically inside the movable opening 5 when subjected to force, until it drives the rubber ring 7 to be pressed and sleeved on the outside of the top pole of the battery unit 1. At this time, the second rivet 13 is inserted into the positioning holes of the inner boss 11 and the outer boss 12 for riveting, so as to quickly complete the overall positioning of the inner top cover 3 and the outer top cover 4. After the outer top cover 4 is covered, the outer sealing gasket 15 will be attached to the corresponding positions of the outer boss 12 and the outer frame 2, thereby forming a double-layer seal with the inner sealing gasket 14, thereby completing a series of work.

[0019] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reverse-rivet battery module with a sealing ring on top, comprising a battery unit (1), wherein a plurality of battery units (1) are evenly arranged and an outer frame (2) is integrally mounted on the outside, and wherein: The top of the outer frame (2) is covered with an inner top cover (3), the top of the inner top cover (3) is provided with an outer top cover (4), and the inner top cover (3) is provided with a plurality of groups of symmetrically distributed movable openings (5), the movable openings (5) are provided with a pressing block (6) inside, the bottom of the pressing block (6) is provided with a rubber ring (7) corresponding to the position of the top pole of the battery unit (1), and the positions of the outer top cover (4) corresponding to the movable openings (5) are symmetrically interspersed with first rivets (8), and the top edge of the outer frame (2) is provided with an inner boss (11), and both sides of the inner top cover (3) are provided with outer bosses (12) that are engaged with the inner bosses (11).

2. The reverse-rivet battery module with a sealing ring placed on top according to claim 1, characterized in that: Riveting interfaces (9) are provided on both sides of the top of the pressing block (6), and the riveting interfaces (9) correspond to the positions of the first rivets (8).

3. The reverse-rivet battery module with a sealing ring placed on top according to claim 1, characterized in that: A plurality of groups of elastic blocks (10) are provided on the inner wall of the outer top cover (4), and the positions of the elastic blocks (10) and the pressing blocks (6) correspond one to one.

4. The reverse-rivet battery module with a sealing ring on top according to claim 1, characterized in that: Second rivets (13) are connected to both sides of the outer top cover (4), and positioning holes matching the second rivets (13) are provided on the inner boss (11) and the outer boss (12).

5. The reverse-rivet battery module with a sealing ring on top according to claim 1, characterized in that: An inner sealing gasket (14) is bonded and fixed to the inner wall of the outer boss (12), and an embedding groove matching the structure of the inner sealing gasket (14) is provided on the outer wall of the inner boss (11).

6. The reverse-rivet battery module with a sealing ring placed on top according to claim 4, characterized in that: An outer sealing gasket (15) is bonded and fixed to the inner wall of the bottom end of the outer top cover (4), and the outer sealing gasket (15) is located below the second rivet (13).

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