CN220474837U - Lower plastic part, cover plate assembly and power battery - Google Patents
Lower plastic part, cover plate assembly and power battery Download PDFInfo
- Publication number
- CN220474837U CN220474837U CN202321711024.9U CN202321711024U CN220474837U CN 220474837 U CN220474837 U CN 220474837U CN 202321711024 U CN202321711024 U CN 202321711024U CN 220474837 U CN220474837 U CN 220474837U
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- China
- Prior art keywords
- plastic part
- lower plastic
- part body
- hole
- mounting hole
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- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000004880 explosion Methods 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 238000009795 derivation Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
In order to solve the problem that when a large amount of accumulated gas is generated in the battery in the prior art, the explosion-proof valve on the lower plastic part is not used for exhausting and releasing pressure to timely generate battery explosion, the utility model provides the lower plastic part, the cover plate assembly and the power battery; the lower plastic part comprises a lower plastic part body, a middle groove is formed in the lower plastic part body and is used for being correspondingly arranged at the explosion-proof valve position of the cover plate, the middle groove is recessed from one surface of the lower plastic part body to the other surface of the lower plastic part body, a first protruding portion is formed on the other surface of the lower plastic part body, a first through hole is formed in the bottom surface of the middle groove, and a second through hole is formed in the side wall of the middle groove. The lower plastic frame is provided with the middle groove, the first protruding part is formed on the other surface of the lower plastic part body and is abutted against the battery cell, so that the loose displacement of the battery cell in the shell is improved; when a large amount of gas in the battery gathers, the first through hole guides the gas to be discharged from the explosion-proof valve, and simultaneously, the second through hole is arranged on the side wall of the middle groove, so that the gas drainage passage in the battery is increased, and the explosion of the battery caused by the overhigh gas pressure in the battery is avoided.
Description
Technical Field
The utility model belongs to the technical field of lithium batteries, and particularly relates to a lower plastic part, a cover plate assembly and a power battery.
Background
In the use process of the power battery, when the battery is excessively charged and discharged and used in a high-low temperature environment, the internal temperature of the power battery rises and generates a large amount of gas, so that the internal pressure of the battery is increased, if the gas is led out or discharged untimely, the explosion of the battery can be possibly caused, in order to solve the problems, an explosion-proof valve hole is generally arranged on a plastic part of a cover plate component of the power battery for exhausting and decompressing, however, structural parts such as a liquid injection hole and a pole mounting hole are further arranged on a lower plastic part in specific assembly, the setting space of the explosion-proof valve hole is limited in limited lower plastic part space, and therefore, when a large amount of gas is generated and accumulated in the battery, the explosion-proof valve hole on the lower plastic part is easy to generate the condition that the explosion-proof valve hole is not timely, the use of the battery is influenced and the potential safety hazard is increased.
Disclosure of Invention
The utility model aims to solve the technical problem that in the prior art, explosion valves on plastic parts are not timely in venting and pressure relief to generate a large amount of accumulated gas in batteries, and battery explosion is generated.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the utility model provides a plastic part down, including lower plastic part body, be equipped with the intermediate tank on the lower plastic part body, the intermediate tank is used for corresponding the explosion-proof valve position that sets up in the apron, the intermediate tank by the direction of one side to the another side of lower plastic part body is sunken, so that the another side of lower plastic part body forms first bulge, first through-hole has been seted up to the bottom surface of intermediate tank, the second through-hole has been seted up on the lateral wall of intermediate tank.
Optionally, a plurality of baffles are arranged in the middle groove, a plurality of baffle plates divide the middle groove into a plurality of sub grooves, and a plurality of sub grooves are arranged at the bottoms of the first through holes.
Optionally, the first through hole is a bar hole, and the first through hole extends along the length direction of the lower plastic part body.
Optionally, the second through holes are formed in the side walls of two sides of the middle groove, the second through holes are rectangular, and the second through holes are perpendicular to the bottom surface of the middle groove.
Optionally, the lower plastic part body is further provided with 2 grooves, the 2 grooves are respectively arranged at two ends of the lower plastic part body, and the grooves are recessed from one surface of the lower plastic part body to the direction of the other surface, so that a second protruding portion is formed on the other surface of the lower plastic part body.
Optionally, the lower plastic part body further comprises a first positive pole mounting hole, a first negative pole mounting hole and a liquid injection hole, wherein the first positive pole mounting hole and the first negative pole mounting hole are symmetrically arranged on two sides of the lower plastic part body.
Optionally, the angular position of the lower plastic part body is a round angle setting.
The utility model provides a cover plate assembly, which comprises a cover plate, a positive pole, a negative pole and a lower plastic part, wherein the cover plate covers one surface of the lower plastic part body, the cover plate seals the middle groove, an explosion-proof valve is arranged at a position corresponding to the middle groove, the cover plate is provided with a second positive pole mounting hole and a second negative pole mounting hole, the positive pole penetrates through the first positive pole mounting hole and the second positive pole mounting hole, and the negative pole penetrates through the first negative pole mounting hole and the second negative pole mounting hole.
Optionally, a power battery is characterized by comprising the cover plate assembly.
According to the lower plastic frame, the middle groove is formed in the middle of the lower plastic part body, and the first protruding part formed on the other surface of the lower plastic part body by the middle groove has the function of abutting against the battery cell, so that the loosening and displacement conditions generated after the battery cell enters the shell are improved; when a large amount of gas in the battery gathers, first through-hole is used for guiding gas to discharge from the explosion-proof valve, avoids taking place the too big problem of explosion of atmospheric pressure, simultaneously, because first through-hole is located towards electric core position, exists by electric core jam risk for avoiding this problem the lateral wall in intermediate tank is provided with the second through-hole, the second through-hole can guide the mediation and excrete the inside gathering gas that produces of battery, has increased the inside gaseous drainage passageway of battery, accelerates gaseous derivation to reduce the inside pressure of battery, improve or avoid the battery explosion scheduling problem because of the inside atmospheric pressure of battery is too high.
Drawings
FIG. 1 is a schematic view of a lower plastic part in a three-dimensional structure according to the present utility model;
FIG. 2 is a schematic view of another perspective structure of the lower plastic part provided by the utility model;
FIG. 3 is a schematic view of a cover plate structure provided by the present utility model;
fig. 4 is an assembly view of a cover plate assembly provided by the present utility model.
Reference numerals in the drawings of the specification are as follows:
1. a lower plastic part body; 2. a middle groove; 21. a first through hole; 22. a second through hole; 3. a first projection; 4. a baffle; 5. dividing grooves; 6. a groove; 7. a second projection; 8. a first positive post mounting hole; 9. a first negative post mounting hole; 10. a liquid injection hole; 11. a cover plate; 12. a positive electrode post; 13. a negative electrode column; 14. a second positive post mounting hole; 15. a second negative electrode post mounting hole; 100. a lower plastic part; 200. and a cover plate assembly.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-2, an embodiment of the present utility model provides a lower plastic part 100, which includes a lower plastic part body 1, a middle groove 2 is provided on the lower plastic part body 1, the middle groove 2 is used for being correspondingly disposed at an explosion-proof valve position of a cover plate 11, the middle groove 2 is recessed from one surface of the lower plastic part body 1 toward the direction of the other surface, so as to form a first protruding portion 3 on the other surface of the lower plastic part body 1, a first through hole 21 is provided on the bottom surface of the middle groove 2, and a second through hole 22 is provided on the side wall of the middle groove 2.
The middle position of the lower plastic part body 1 is provided with a middle groove 2, and a first protruding part 3 formed on the other surface of the lower plastic part body 1 by the middle groove 2 plays a role of abutting against the battery cell, so that the loosening and displacement of the battery cell in the shell are improved; when a large amount of gas in the battery gathers, first through-hole 21 is used for guiding the gas to discharge from the explosion-proof valve, avoids taking place the too big problem of explosion of atmospheric pressure, simultaneously, because first through-hole 21 is located towards the electric core position, exists by electric core jam risk, for avoiding this problem the lateral wall of intermediate tank 2 is provided with second through-hole 22, second through-hole 22 can guide the mediation and excrete the inside gathering gas that produces of battery, has increased the inside gaseous drainage passageway of battery, accelerates gaseous derivation to reduce the inside pressure of battery, improve or avoid the battery explosion scheduling problem because of the inside atmospheric pressure of battery is too high.
In an embodiment, a plurality of baffles 4 are disposed inside the middle tank 2, a plurality of sub-tanks 5 are formed by separating the middle tank 2 by a plurality of baffles 4, and the bottoms of the sub-tanks 5 are all provided with the first through holes 21.
Specifically, the first through hole 21 is used for guiding the gas to be discharged from the explosion-proof valve, so as to avoid the problem of explosion caused by excessive air pressure, and plays a role in conducting the gas in the drain battery.
In an embodiment, the first through hole 21 is a bar-shaped hole, and the first through hole 21 extends along the length direction of the lower plastic body 1.
In an embodiment, the second through holes 22 are formed on two side walls of the middle groove 2, the second through holes 22 are rectangular, and the second through holes 22 are perpendicular to the bottom surface of the middle groove 2.
Specifically, the second through hole 22 formed on the side wall of the middle groove 2 can guide and dredge the accumulated gas generated in the battery, increase the gas drainage path in the battery, accelerate the gas guiding out, and reduce the internal pressure of the battery.
In an embodiment, the lower plastic body 1 is further provided with 2 grooves 6,2 grooves 6 are respectively disposed at two ends of the lower plastic body 1, and the grooves 6 are recessed from one surface of the lower plastic body 1 toward the direction of the other surface, so that a second protruding portion 7 is formed on the other surface of the lower plastic body 1.
In an embodiment, the lower plastic part body 1 further includes a first positive pole mounting hole 8, a first negative pole mounting hole 9 and a liquid injection hole 10, where the first positive pole mounting hole 8 and the first negative pole mounting hole 9 are symmetrically disposed on two sides of the lower plastic part body 1.
In an embodiment, the angular position of the lower plastic part body 1 is a rounded corner.
Specifically, the angular position of the lower plastic part body 1 is set to be a round angle, so that extrusion and puncture abrasion of other components by sharp angles during assembly of the battery cell into the shell can be avoided.
Referring to fig. 3 to 4, an embodiment of the present utility model provides a cover plate assembly 200, which includes a cover plate 11, a positive electrode post 12, a negative electrode post 13, and the lower plastic member 100, wherein the cover plate 11 covers one surface of the lower plastic member body 1, the cover plate 11 seals the middle groove 2, an explosion-proof valve is disposed at a position corresponding to the middle groove 2 on the cover plate 11, the cover plate 11 is provided with a second positive electrode post mounting hole 14 and a second negative electrode post mounting hole 15, the positive electrode post 12 passes through the first positive electrode post mounting hole 8 and the second positive electrode post mounting hole 14, and the negative electrode post 13 passes through the first negative electrode post mounting hole 9 and the second negative electrode post mounting hole 15.
The positive pole 12 sequentially passes through the first positive pole mounting hole 8 on the lower plastic part 100 and the second positive pole mounting hole 14 on the cover plate 11, the negative pole 13 sequentially passes through the first negative pole mounting hole 9 on the lower plastic part 100 and the second negative pole mounting hole 15 on the cover plate 11, and the cover plate 11 is combined with the lower plastic part 100 to form the battery cover plate assembly 200 through the connection of the positive pole 12 and the negative pole 13.
Another embodiment of the present utility model provides a power cell including the cover assembly 200.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (7)
1. The utility model provides a plastic part down, its characterized in that, includes the plastic part body down, be equipped with the intermediate tank on the plastic part body down, the intermediate tank is used for corresponding the explosion-proof valve position that sets up in the apron, the intermediate tank by the one side of plastic part body down is sunken to the direction of another side, in order to the another side of plastic part body forms first bulge down, first through-hole has been seted up to the bottom surface of intermediate tank, the second through-hole has been seted up on the lateral wall of intermediate tank, the intermediate tank is inside to be provided with a plurality of baffles, will by a plurality of the baffle divide the intermediate tank to separate and form a plurality of branch grooves, a plurality of divide the groove bottom all to be provided with first through-hole.
2. The lower plastic part according to claim 1, wherein the first through hole is a strip-shaped hole, and the first through hole extends along the length direction of the lower plastic part body.
3. The lower plastic part according to claim 1, wherein the second through holes are formed in two side walls of the middle groove, the second through holes are rectangular, and the second through holes are perpendicular to the bottom surface of the middle groove.
4. The lower plastic part according to claim 1, wherein the lower plastic part body is further provided with 2 grooves, 2 grooves are respectively formed at two ends of the lower plastic part body, and the grooves are recessed from one surface of the lower plastic part body toward the other surface, so that a second protruding portion is formed on the other surface of the lower plastic part body.
5. The lower plastic part according to claim 1, wherein the angular position of the lower plastic part body is a rounded corner arrangement.
6. The cover plate assembly is characterized by comprising a cover plate, positive poles, negative poles and a lower plastic part according to any one of claims 1-5, wherein the lower plastic part body further comprises a first positive pole mounting hole, a first negative pole mounting hole and a liquid injection hole, the first positive pole mounting hole and the first negative pole mounting hole are symmetrically arranged on two sides of the lower plastic part body, the cover plate covers one side of the lower plastic part body, the cover plate seals the middle groove, an explosion-proof valve is arranged at the position corresponding to the middle groove, the cover plate is provided with a second positive pole mounting hole and a second negative pole mounting hole, the positive pole penetrates through the first positive pole mounting hole and the second positive pole mounting hole, and the negative pole penetrates through the first negative pole mounting hole and the second negative pole mounting hole.
7. A power cell comprising the cover assembly of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321711024.9U CN220474837U (en) | 2023-06-30 | 2023-06-30 | Lower plastic part, cover plate assembly and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321711024.9U CN220474837U (en) | 2023-06-30 | 2023-06-30 | Lower plastic part, cover plate assembly and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220474837U true CN220474837U (en) | 2024-02-09 |
Family
ID=89797585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321711024.9U Active CN220474837U (en) | 2023-06-30 | 2023-06-30 | Lower plastic part, cover plate assembly and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220474837U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118486880A (en) * | 2024-07-16 | 2024-08-13 | 常州埃美电器科技有限公司 | Battery cover plate discharging and shaping equipment |
-
2023
- 2023-06-30 CN CN202321711024.9U patent/CN220474837U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118486880A (en) * | 2024-07-16 | 2024-08-13 | 常州埃美电器科技有限公司 | Battery cover plate discharging and shaping equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |