CN220456584U - Lower plastic component and power battery - Google Patents
Lower plastic component and power battery Download PDFInfo
- Publication number
- CN220456584U CN220456584U CN202321038325.XU CN202321038325U CN220456584U CN 220456584 U CN220456584 U CN 220456584U CN 202321038325 U CN202321038325 U CN 202321038325U CN 220456584 U CN220456584 U CN 220456584U
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- Prior art keywords
- explosion
- proof
- lower plastic
- band
- pole mounting
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- 230000009172 bursting Effects 0.000 claims abstract description 29
- 238000004880 explosion Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000002349 favourable effect Effects 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
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The application provides a lower plastic component and a power battery. The plastic assembly comprises a first pole mounting part, an explosion-proof air outlet part and a second pole mounting part which are sequentially connected, wherein the first pole mounting part is provided with a first pole hole, the second pole mounting part is provided with a second pole hole, the explosion-proof air outlet part is provided with a plurality of explosion-proof holes arranged at intervals, the explosion-proof holes are used for gas passing through the battery cell, the explosion-proof air outlet part is provided with an explosion-proof bursting belt, and the explosion-proof bursting belt is used for bursting when the pressure of the battery cell reaches a critical value so as to increase the area through which the gas of the battery cell passes. Specifically, under the combined action of explosion-proof hole and explosion-proof burst area for the pressure release area of plastic is great down, and then makes pressure release efficiency higher.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a lower plastic component and a power battery.
Background
The battery generally includes a battery cell, a case for accommodating the battery cell, and a top cover, and a lower plastic is generally disposed between the battery cell and the top cover of the battery cell to prevent a short circuit between the electrode assembly and the top cover.
For example, chinese patent with application number of cn2020236373. X discloses a lower plastic, battery top cover and power battery, wherein the lower plastic is flat plate structure, be equipped with a plurality of reference columns around the upper side of lower plastic, lower plastic one end is equipped with lower plastic positive explosion-proof hole, the lower plastic other end is equipped with the protruding lower plastic negative pole of upwards protruding, be equipped with lower plastic negative pole explosion-proof hole on the protruding lower plastic negative pole, the upper side of lower plastic is equipped with lower plastic explosion-proof valve recess, be equipped with explosion-proof hole on the lower plastic explosion-proof valve recess, still be equipped with annotating liquid explosion-proof hole on the lower plastic. The lower plastic adopts a sheet structure, reduces the protruding area of the lower plastic in the battery shell, greatly lightens the weight of the lower plastic, is favorable for increasing the energy density of the battery cell, simultaneously reduces the cost of the lower plastic, and improves the air leakage or liquid leakage condition caused by loosening of the sealing ring due to deformation of the lower plastic.
However, the following problems exist in the structural design of the above lower plastic in the use process:
when a large amount of gas is sprayed out of the thermal runaway of the battery cell, the lower plastic is used for exhausting the gas through the explosion-proof hole, however, the area of the explosion-proof hole is smaller, namely the pressure release area is smaller, and the gas cannot be timely exhausted, namely the pressure release efficiency is lower.
Therefore, a lower plastic structure with a larger pressure relief area and higher pressure relief efficiency is needed.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a lower plastic component and a power battery, which have larger pressure relief area and higher pressure relief efficiency.
The aim of the utility model is realized by the following technical scheme:
a lower plastic assembly, comprising:
the explosion-proof battery cell comprises a first pole mounting part, an explosion-proof air outlet part and a second pole mounting part which are sequentially connected, wherein a first pole hole is formed in the first pole mounting part, a second pole hole is formed in the second pole mounting part, a plurality of explosion-proof holes arranged at intervals are formed in the explosion-proof air outlet part, an explosion-proof bursting belt is arranged on the explosion-proof air outlet part, the explosion-proof bursting belt is used for bursting when the pressure of the battery cell reaches a critical value, and the explosion-proof bursting belt is adjacent to the explosion-proof holes.
In one embodiment, the thickness of the burst strip is between one half and one third of the thickness of the burst vent.
In one embodiment, a plurality of said explosion proof apertures are disposed around said burst strip.
In one embodiment, the explosion-proof bursting strap comprises a first arc-shaped strap body, a second arc-shaped strap body and a linear strap body, wherein two ends of the linear strap body are respectively connected with the first arc-shaped strap body and the second arc-shaped strap body.
In one embodiment, the second arc-shaped belt body comprises a second left arc-shaped belt, a second left straight line belt, a second middle arc-shaped belt, a second right straight line belt and a second right arc-shaped belt which are sequentially connected, and the second middle arc-shaped belt is connected to the other end of the straight line belt body.
In one embodiment, the explosion-proof vent is connected to the first pole mounting portion and the second pole mounting portion in a protruding manner.
In one embodiment, each explosion protection hole is rectangular; and/or the number of the groups of groups,
the first pole mounting part is also provided with a liquid injection hole, and the liquid injection hole and the first pole hole are arranged at intervals.
In one embodiment, a plurality of first limiting holes are further formed in one end, far away from the explosion-proof air outlet part, of the first pole mounting part, and the first limiting holes are arranged at intervals; and/or the number of the groups of groups,
and one end of the second pole mounting part, which is far away from the explosion-proof air outlet part, is also provided with a plurality of second limiting holes, and a plurality of second limiting holes are arranged at intervals.
A power cell comprising a top cover and a lower plastic component as described in any of the embodiments, the top cover being connected to the lower plastic component.
Compared with the prior art, the utility model has at least the following advantages:
according to the lower plastic component, the explosion-proof air outlet part is provided with the plurality of explosion-proof holes which are arranged at intervals, when the battery cell is out of control and generates gas, the gas is discharged through the explosion-proof holes, and the explosion-proof valve is broken firstly; further, the explosion-proof air outlet part is provided with an explosion-proof bursting belt, when more gas is generated by the battery cell, and the explosion-proof hole and the explosion-proof valve can not timely exhaust the gas, the gas generates air pressure in the shell, and when the air pressure reaches a certain value, the explosion-proof bursting belt is destroyed, so that the gas passing area is increased, namely the pressure release area of the lower plastic component is increased, the pressure release efficiency is improved, and further, the expansion or even explosion of the battery is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a lower plastic component according to an embodiment;
FIG. 2 is a schematic view of another structure of the lower plastic component shown in FIG. 1;
FIG. 3 is a schematic view of a lower plastic assembly shown in FIG. 1;
FIG. 4 is a schematic view of the connection between the lower plastic component and the battery top cover shown in FIG. 1;
FIG. 5 is a schematic view of another structure of the lower plastic component shown in FIG. 1;
FIG. 6 is a structural cross-sectional view taken along A-A of the lower plastic assembly shown in FIG. 5;
fig. 7 is an enlarged partial schematic view of the lower plastic component at B of fig. 6.
Detailed Description
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The application provides a plastic subassembly down, including the first utmost point post installation department, explosion-proof portion of giving vent to anger and second utmost point post installation department that connect gradually, first utmost point post hole has been seted up to first utmost point post installation department, the second utmost point post hole has been seted up to second utmost point post installation department, explosion-proof portion of giving vent to anger has been seted up the explosion-proof hole that a plurality of intervals set up, and is a plurality of explosion-proof hole is used for the gaseous passing through of electric core, explosion-proof portion of giving vent to anger is equipped with explosion-proof burst area, explosion-proof burst area is used for break when electric core atmospheric pressure reaches the critical value, explosion-proof burst area is adjacent a plurality of explosion-proof hole sets up.
According to the lower plastic component, the explosion-proof air outlet part is provided with the plurality of explosion-proof holes which are arranged at intervals, when the battery cell is out of control and generates gas, the gas is discharged through the explosion-proof holes, and the explosion-proof valve is broken firstly; further, the explosion-proof air outlet part is provided with an explosion-proof bursting belt, when more gas is generated by the battery cell, and the explosion-proof hole and the explosion-proof valve can not timely exhaust the gas, the gas generates air pressure in the shell, and when the air pressure reaches a certain value, the explosion-proof bursting belt is destroyed, so that the gas passing area is increased, namely the pressure release area of the lower plastic component is increased, the pressure release efficiency is improved, and further, the expansion or even explosion of the battery is avoided.
For better understanding of the technical solutions and advantageous effects of the present application, the following details are further described with reference to specific embodiments:
as shown in fig. 1 to 3, the lower plastic component 10a of an embodiment includes a first pole mounting portion 100, an explosion-proof air outlet portion 200 and a second pole mounting portion 300 connected in sequence, wherein the first pole mounting portion 100 is provided with a first pole hole 110, the second pole mounting portion 300 is provided with a second pole hole 310, and the first pole hole 110 and the second pole hole 310 are respectively used for embedding a positive pole and a negative pole of a battery. The explosion-proof air outlet part 200 is provided with a plurality of explosion-proof holes 210 which are arranged at intervals, and the explosion-proof holes 210 are used for the gas passing through the battery cell; further, the explosion-proof air outlet 200 is provided with an explosion-proof bursting band 220, and the explosion-proof bursting band 220 is used for bursting when the air pressure of the battery cell reaches a critical value, so that the pressure release area of the explosion-proof air outlet 200 is increased, the explosion-proof bursting band 220 is arranged adjacent to the explosion-proof holes 210, namely, under the combined action of the explosion-proof holes 210 and the explosion-proof bursting band 220, the gas generated by the battery cell is discharged. It will be appreciated that the gas pressure threshold is 0.3-0.5mpa, i.e. when the gas pressure reaches 0.3-0.5mpa, the gas breaks the burst valve before striking the burst strip.
In one embodiment, when the air pressure of the battery cell reaches 0.3mpa, a large amount of air in the battery cell rushes out of the explosion-proof hole at this time, so that the explosion-proof valve is broken, and then the explosion-proof bursting belt is impacted, so that the pressure relief area of the lower plastic component 10a is increased.
In one embodiment, the lower plastic component 10a is an insulating plastic part, the explosion-proof air outlet 200 is provided with a plurality of explosion-proof holes 210, and when the battery cell is out of control, i.e. the temperature of the battery cell increases to generate a large amount of air, the air is collected into the explosion-proof air outlet 200 at this time, and the plurality of explosion-proof holes 210 perform the first step of air discharge. When the temperature of the battery cell is continuously increased and gas is continuously generated, the explosion-proof hole 210 cannot timely discharge all the gas, at this time, the gas is compressed inside the shell and generates pressure, when the pressure reaches 0.3-0.5mpa, the explosion-proof valve is broken by the gas, and then the explosion-proof breaking belt 220 is broken by the gas, so that the gas can pass through the explosion-proof breaking belt 220, namely the pressure relief area of the lower plastic component 10a is increased.
In the lower plastic component 10a, the explosion-proof air outlet 200 is provided with a plurality of explosion-proof holes 210 arranged at intervals, and when the battery cell is out of control and generates air, the air is discharged through the explosion-proof holes 210, so that the explosion-proof valve is ruptured; further, the explosion-proof air outlet 200 is provided with an explosion-proof bursting belt 220, when more gas is generated by the battery cell, the explosion-proof hole 210 and the explosion-proof valve can not timely exhaust the gas, the gas generates air pressure in the shell, and when the air pressure reaches a certain value, the explosion-proof bursting belt 220 is destroyed, so that the gas passing area is increased, namely the pressure release area of the lower plastic component 10a is increased, the pressure release efficiency is improved, and further, the expansion and even explosion of the battery are avoided.
As shown in fig. 5-7, in one embodiment, the thickness of the burst strip 220 is between one half and one third of the thickness of the burst vent 200. It will be appreciated that the explosion proof burst strap 220 is thinner than the explosion proof vent 200, and when the gas generated from the cell reaches a certain value, the explosion proof burst strap 220 is broken by the gas burst, so that the gas can pass through the explosion proof burst strap 220.
As shown in fig. 1 and 2, in one embodiment, a plurality of blast holes 210 are disposed around the blast belt 220. It can be understood that the gas generated by the battery core passes through the explosion-proof holes 210, when the explosion-proof holes 210 cannot timely exhaust the gas, the gas generates pressure inside the housing, and when the pressure reaches a critical value, the explosion-proof burst belt 220 is burst and damaged by the gas, so that the gas can pass through the explosion-proof burst belt 220.
As shown in fig. 2, in one embodiment, the explosion-proof bursting strap 220 includes a first arc-shaped strap 221, a second arc-shaped strap 223 and a linear strap 222, and two ends of the linear strap 222 are respectively connected with the first arc-shaped strap 221 and the second arc-shaped strap 223. It is understood that the first arc-shaped band 221, the second arc-shaped band 223 and the straight line band 222 can be broken by the gas.
As shown in fig. 2, in one embodiment, the first arcuate band 221 includes a first left arcuate band 2211, a first left straight band 2212, a first middle arcuate band 2213, a first right straight band 2214, and a first right arcuate band 2215 connected in sequence, and the first middle arcuate band 2213 is connected to one end of the straight band 222.
As shown in fig. 2, in one embodiment, the second arc-shaped band 223 includes a second left arc-shaped band 2231, a second left straight line band 2232, a second middle arc-shaped band 2233, a second right straight line band 2234, and a second right arc-shaped band 2235, which are sequentially connected, and the second middle arc-shaped band 2233 is connected to the other end of the straight line band 222.
As shown in fig. 1 and 2, in one embodiment, the explosion vent 200 is convexly connected to the first pole mounting portion 100 and the second pole mounting portion 300. It can be understood that the explosion-proof air outlet portion 200 is convexly disposed on the first pole mounting portion 100 and the second pole mounting portion 300, and when the lower plastic component 10a is connected with the top cover 10b, a gap exists between the explosion-proof air outlet portion 200 and the top cover 10b, so that a gap exists between the explosion-proof bursting belt 220 and the top cover 10b, and further the explosion-proof bursting belt 220 can be burst under the action of air pressure.
As shown in fig. 1 and 2, in one embodiment, each blast hole 210 is rectangular in shape. It is understood that the explosion proof hole 210 may have other shapes such as arc shape or circular shape.
As shown in fig. 1, in one embodiment, the first pole mounting portion 100 is further provided with a filling hole 120, and the filling hole 120 is spaced from the first pole hole 110. It can be understood that the liquid injection hole 120 of the first pole mounting part 100 is matched with the liquid injection hole 120 of the battery top cover 10b, and when the battery is assembled, the electrolyte is injected through the liquid injection hole 120 to conduct the battery.
As shown in fig. 1, in one embodiment, the end of the first pole mounting portion 100 away from the explosion-proof air outlet portion 200 is further provided with a plurality of first limiting holes 130, and the plurality of first limiting holes 130 are disposed at intervals. It will be appreciated that the first limiting aperture 130 is connected to the housing of the battery such that the lower plastic is connected to the housing.
As shown in fig. 1, in one embodiment, the end of the second post installation portion 300, which is far away from the explosion-proof air outlet portion 200, is further provided with a plurality of second limiting holes 320, and the plurality of second limiting holes 320 are disposed at intervals. It can be appreciated that the second limiting hole 320 is connected with the housing of the battery, that is, the lower plastic is connected with the housing through the first limiting hole 130 and the second limiting hole 320.
As shown in fig. 4, the present application further provides a power battery 10, which includes a top cover 10b and a lower plastic component 10a according to any embodiment, wherein the top cover 10b is connected with the lower plastic component 10 a.
Compared with the prior art, the utility model has at least the following advantages:
according to the lower plastic component, the explosion-proof air outlet part is provided with the plurality of explosion-proof holes which are arranged at intervals, when the battery cell is out of control and generates gas, the gas is discharged through the explosion-proof holes, and the explosion-proof valve is broken firstly; further, the explosion-proof air outlet part is provided with an explosion-proof bursting belt, when more gas is generated by the battery cell, and the explosion-proof hole and the explosion-proof valve can not timely exhaust the gas, the gas generates air pressure in the shell, and when the air pressure reaches a certain value, the explosion-proof bursting belt is destroyed, so that the gas passing area is increased, namely the pressure release area of the lower plastic component is increased, the pressure release efficiency is improved, and further, the expansion or even explosion of the battery is avoided.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The lower plastic component comprises a first pole mounting part, an explosion-proof air outlet part and a second pole mounting part which are sequentially connected, wherein the first pole mounting part is provided with a first pole hole, the second pole mounting part is provided with a second pole hole, the explosion-proof air outlet part is provided with a plurality of explosion-proof holes which are arranged at intervals,
the explosion-proof air outlet part is provided with an explosion-proof bursting belt, the explosion-proof bursting belt is used for bursting when the air pressure in the battery cell reaches a critical value, and the explosion-proof bursting belt is arranged adjacent to a plurality of explosion-proof holes.
2. The lower plastic assembly of claim 1, wherein the burst strip has a thickness between one half and one third of the thickness of the burst vent.
3. The lower plastic assembly of claim 1, wherein a plurality of said explosion proof apertures are disposed around said burst strip.
4. The lower plastic assembly of claim 1, wherein the burst strip comprises a first arcuate strip, a second arcuate strip, and a linear strip, wherein two ends of the linear strip are connected to the first arcuate strip and the second arcuate strip, respectively.
5. The lower plastic assembly of claim 4, wherein the first arcuate band comprises a first left arcuate band, a first left linear band, a first intermediate arcuate band, a first right linear band, and a first right arcuate band connected in sequence, the first intermediate arcuate band being connected to one end of the linear band.
6. The lower plastic assembly of claim 5, wherein the second arcuate band comprises a second left arcuate band, a second left linear band, a second intermediate arcuate band, a second right linear band, and a second right arcuate band connected in sequence, the second intermediate arcuate band being connected to the other end of the linear band.
7. The lower plastic assembly of claim 1, wherein the explosion proof vent is convexly coupled to the first pole mounting portion and the second pole mounting portion.
8. The lower plastic assembly of claim 1, wherein each of the explosion proof holes is rectangular; and/or the number of the groups of groups,
the first pole mounting part is also provided with a liquid injection hole, and the liquid injection hole and the first pole hole are arranged at intervals.
9. The lower plastic assembly of claim 1, wherein the end of the first pole mounting portion remote from the explosion-proof vent is further provided with a plurality of first limiting holes, and the plurality of first limiting holes are arranged at intervals; and/or the number of the groups of groups,
and one end of the second pole mounting part, which is far away from the explosion-proof air outlet part, is also provided with a plurality of second limiting holes, and a plurality of second limiting holes are arranged at intervals.
10. A power cell comprising a top cover and a lower plastic component according to any one of claims 1 to 9, said top cover being connected to said lower plastic component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321038325.XU CN220456584U (en) | 2023-05-04 | 2023-05-04 | Lower plastic component and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321038325.XU CN220456584U (en) | 2023-05-04 | 2023-05-04 | Lower plastic component and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220456584U true CN220456584U (en) | 2024-02-06 |
Family
ID=89727392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321038325.XU Active CN220456584U (en) | 2023-05-04 | 2023-05-04 | Lower plastic component and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220456584U (en) |
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2023
- 2023-05-04 CN CN202321038325.XU patent/CN220456584U/en active Active
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