CN220382265U - Battery shell structure and cylindrical battery - Google Patents
Battery shell structure and cylindrical battery Download PDFInfo
- Publication number
- CN220382265U CN220382265U CN202321258823.5U CN202321258823U CN220382265U CN 220382265 U CN220382265 U CN 220382265U CN 202321258823 U CN202321258823 U CN 202321258823U CN 220382265 U CN220382265 U CN 220382265U
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- Prior art keywords
- explosion
- battery
- proof valve
- cover plate
- shell
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007788 liquid Substances 0.000 claims abstract description 56
- 238000002347 injection Methods 0.000 claims abstract description 49
- 239000007924 injection Substances 0.000 claims abstract description 49
- 238000004804 winding Methods 0.000 claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 8
- 238000004880 explosion Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910001416 lithium ion 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
- 238000004904 shortening 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 battery shell structure and a cylindrical battery. The battery shell structure comprises a shell, a cover plate, a first explosion-proof valve and a second explosion-proof valve. The cover plate is connected with the shell, an accommodating cavity is formed between the cover plate and the shell, the accommodating cavity is used for accommodating the winding core, a liquid injection hole is formed in the end portion of the shell, the liquid injection hole is communicated with the accommodating cavity, the first explosion-proof valve is arranged in the liquid injection hole and connected with the shell, and the second explosion-proof valve is connected with the cover plate. Specifically, the end part of the shell and the cover plate are both provided with explosion-proof valves, namely, the two ends of the battery are both provided with the explosion-proof valves, so that gas can flow out of the two explosion-proof valves respectively, the exhaust distance of the gas is shortened, and the safety performance of the battery is improved.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery shell structure and a cylindrical battery.
Background
The working principle of charging and discharging of the lithium battery is that lithium ions move back and forth between the anode and the cathode through the electrolyte, so that the electrolyte plays a role of a bridge in a lithium battery system. In the prior art, a liquid injection hole is generally formed in a lithium battery shell, and electrolyte is injected into the battery through the liquid injection hole.
For example, chinese patent application No. CN202210473645.1 discloses a lithium battery case convenient for liquid injection, which comprises a cylindrical tube, a positive electrode cover plate and a negative electrode cover plate, wherein the positive electrode cover plate and the negative electrode cover plate are used for sealing openings at two ends of the cylindrical tube, the positive electrode cover plate and the negative electrode cover plate are sealed to form a containing cavity, and the containing cavity is used for containing a lithium battery cell; the cylindrical tube comprises a diversion channel; the positive electrode cover plate comprises a liquid injection hole, an assembly through hole A is arranged in the center of the positive electrode cover plate, and the liquid injection hole is arranged at the edge of the positive electrode cover plate; the negative electrode cover plate comprises a current collecting channel, and an assembly through hole B is arranged in the center of the negative electrode cover plate. The beneficial effects of the utility model are as follows: the contact area between the electrolyte of the lithium battery injection and the battery core is more uniform when the electrolyte flows into the battery, and the contact time is longer; when the injected electrolyte reaches the required amount, a prompt can be sent out and the liquid injection is stopped, so that the liquid injection process is optimized.
However, the structural design of the lithium battery case has the following problems in use:
the lithium battery shell top cover plate is provided with the explosion-proof valve, however, if the explosion-proof valve is only arranged on the top cover plate of the shell for a battery with a longer winding core, such as a battery with a height larger than 80mm, the gas cannot be discharged in time due to the fact that the distance from bottom gas to the top is longer, and the risk of explosion of the battery exists.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a battery shell structure and a cylindrical battery, wherein the battery shell structure shortens the gas discharge distance and has good safety performance.
The aim of the utility model is realized by the following technical scheme:
a battery case structure comprising:
the cover plate is connected with the shell, and an accommodating cavity is formed by the cover plate and the shell together and is used for accommodating the winding core;
the battery shell structure further comprises a first explosion-proof valve and a second explosion-proof valve, the end part of the shell is provided with a liquid injection hole, the liquid injection hole is communicated with the accommodating cavity, the first explosion-proof valve is arranged in the liquid injection hole and connected with the shell, and the second explosion-proof valve is connected with the cover plate.
In one embodiment, the cover plate is provided with a through hole, the through hole is communicated with the accommodating cavity, and the second explosion-proof valve is arranged in the through hole and connected with the cover plate; and/or the number of the groups of groups,
the liquid injection hole is formed in the middle of the end part of the shell.
In one embodiment, the casing is provided with an embedded groove, the embedded groove is communicated with the liquid injection hole, and the first explosion-proof valve is located in the embedded groove and connected with the casing.
In one embodiment, the first explosion-proof valve comprises a connecting part and a plugging part, wherein the connecting part and the plugging part are connected, the plugging part penetrates through the liquid injection hole, and the connecting part is positioned in the embedded groove and is connected with the shell.
In one embodiment, the cross section of the first explosion-proof valve is T-shaped.
In one embodiment, the battery case structure further includes a top cap assembly connected to the cap plate, the top cap assembly being spaced apart from the second explosion-proof valve.
In one embodiment, the cover plate is provided with a mounting hole, and the top cover assembly is arranged in the mounting hole in a penetrating manner and is connected with the cover plate.
A cylindrical battery comprises a winding core, a current collecting disc and the battery shell structure according to any embodiment, wherein the winding core is positioned in the accommodating cavity, the winding core is connected with the current collecting disc, and the current collecting disc is connected with the shell.
In one embodiment, the collecting tray is provided with a connecting hole, the connecting hole is respectively communicated with the accommodating cavity and the liquid injection hole, and the first explosion-proof valve sequentially penetrates through the liquid injection hole and the connecting hole.
In one embodiment, a liquid inlet channel is formed in the middle of the winding core, and the liquid inlet channel is arranged corresponding to the connecting hole and the liquid injection hole.
Compared with the prior art, the utility model has at least the following advantages:
foretell battery housing structure, annotate the liquid hole has been seted up to the tip of casing, and first explosion-proof valve sets up in annotating the liquid downthehole and is connected with the casing, and the explosion-proof valve of second sets up on the apron for the inside gaseous that produces of battery can flow from first explosion-proof valve and explosion-proof valve of second respectively, has shortened gaseous transmission distance, has avoided the risk of battery burst, has improved the security performance of battery.
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 structural view of a battery case structure according to an embodiment;
FIG. 2 is another schematic view of the battery case structure shown in FIG. 1;
FIG. 3 is a schematic view of a further construction of the battery housing structure shown in FIG. 1;
fig. 4 is a structural cross-sectional view of the battery case structure shown in fig. 1;
fig. 5 is a partially enlarged schematic view at a of the battery case structure shown in fig. 4.
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 battery shell structure, which comprises a shell and a cover plate, wherein the cover plate is connected with the shell, an accommodating cavity is formed by the cover plate and the shell together, and the accommodating cavity is used for accommodating a winding core; the battery shell structure further comprises a first explosion-proof valve and a second explosion-proof valve, the end part of the shell is provided with a liquid injection hole, the liquid injection hole is communicated with the accommodating cavity, the first explosion-proof valve is arranged in the liquid injection hole and connected with the shell, and the second explosion-proof valve is connected with the cover plate.
Foretell battery housing structure, annotate the liquid hole has been seted up to the tip of casing, and first explosion-proof valve sets up in annotating the liquid downthehole and is connected with the casing, and the explosion-proof valve of second sets up on the apron for the inside gaseous that produces of battery can flow from first explosion-proof valve and explosion-proof valve of second respectively, has shortened gaseous transmission distance, has avoided the risk of battery burst, has improved the security performance of battery.
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 4, the battery housing structure 10 of an embodiment includes a housing 100, a cover plate 200, a first explosion-proof valve 400 and a second explosion-proof valve 500, the cover plate 200 is connected with the housing 100, the cover plate 200 and the housing 100 together form a containing cavity 130, the containing cavity 130 is used for containing a winding core 700, a liquid injection hole 110 is formed at an end of the housing 100, the liquid injection hole 110 is communicated with the containing cavity 130, the first explosion-proof valve 400 is disposed in the liquid injection hole 110 and connected with the housing 100, and the second explosion-proof valve 500 is connected with the cover plate 200.
In this embodiment, after the electrolyte is injected through the injection hole 110, the first explosion-proof valve 400 is welded into the injection hole 110, that is, the injection hole 110 and the first explosion-proof valve 400 are integrally designed, so that the cost of the structural component is lower. Further, the second explosion-proof valve 500 is disposed on the cover 200, so that the explosion-proof valves are disposed at both ends of the battery, thereby shortening the gas transmission distance and further improving the safety performance of the winding core 700.
The above-mentioned battery housing structure 10, annotate liquid hole 110 has been seted up to the tip of casing 100, and first explosion-proof valve 400 sets up in annotating liquid hole 110 and is connected with casing 100, and second explosion-proof valve 500 sets up on apron 200, so make the inside gaseous that produces of battery can follow first explosion-proof valve 400 and second explosion-proof valve 500 respectively flow, shortened gaseous transmission distance, avoided the risk of battery burst, improved the security performance of battery.
As shown in fig. 1, in one embodiment, the cover plate 200 is provided with a through hole 210, the through hole 210 communicates with the accommodating chamber 130, and the second explosion-proof valve 500 is disposed in the through hole 210 and connected with the cover plate 200. It can be appreciated that the second explosion-proof valve 500 is disposed in the through hole 210, and when gas is generated inside the battery, the gas can flow out of the first explosion-proof valve 400 and the second explosion-proof valve 500 at both ends, respectively, avoiding the risk of explosion of the battery.
As shown in fig. 2 and 3, in one embodiment, the housing 100 is provided with an embedded groove 120, the embedded groove 120 communicates with the liquid injection hole 110, and the first explosion-proof valve 400 is located in the embedded groove 120 and is connected with the housing 100. It will be appreciated that the first explosion proof valve 400 is located within the embedded groove 120, and that the first explosion proof valve 400 is welded to the housing 100.
As shown in fig. 2 and 3, in one embodiment, the filling hole 110 is formed in the middle of the end of the housing 100. It can be understood that the liquid injection hole is located in the middle of the end of the casing 100, when the electrolyte is injected into the winding core from the liquid injection hole 110, the electrolyte starts to infiltrate from the middle of the winding core until the electrolyte infiltrates around the winding core 700, so that the electrolyte infiltration effect is better.
As shown in fig. 5, in one embodiment, the first explosion-proof valve 400 includes a connecting portion 410 and a plug portion 420, wherein the connecting portion 410 is connected with the housing 100, and the plug portion 420 is disposed through the injection hole 110, and the connecting portion 410 is disposed in the embedded groove 120. It can be understood that the insertion portion 420 is inserted into the liquid injection hole 110, that is, the liquid injection hole 110 is blocked by the insertion portion 420, so as to perform a sealing function, and the connecting portion 410 is welded to the housing 100.
As shown in fig. 5, in one embodiment, the first explosion proof valve 400 has a T-shaped cross section. It will be appreciated that the first explosion proof valve 400 is disposed through the filler neck 110, and the periphery of the first explosion proof valve 400 is welded to the housing 100.
As shown in fig. 1, in one embodiment, the battery case structure 10 further includes a top cap assembly 600, the top cap assembly 600 is connected to the cap plate 200, and the top cap assembly 600 is spaced apart from the second explosion-proof valve 500. It is understood that the top cap assembly 600 is disposed on the cap plate 200, and the top cap assembly 600 is connected with the winding core 700 to realize the conductive function of the battery.
In one embodiment, as shown in fig. 5, the cover plate 200 is provided with a mounting hole 220, and the top cover assembly 600 is inserted through the mounting hole 220 and connected with the cover plate 200. It will be appreciated that the top cap assembly 600 is penetrated through the mounting hole 220, and the top cap assembly 600 is connected with the winding core 700 within the receiving chamber 130 to make the battery conductive.
As shown in fig. 4 and 5, the present application further provides a cylindrical battery, which includes a winding core 700, a current collecting disc 800, and the battery housing structure 10 according to any of the foregoing embodiments, where the winding core 700 is located in the accommodating cavity 130, the winding core 700 is connected to the current collecting disc 800, and the current collecting disc 800 is connected to the housing 100. It will be appreciated that the winding core 700 is positioned within the receiving chamber 130 and is connected to the current collecting plate 800 and the top cap assembly 600, respectively, to make the battery conductive.
As shown in fig. 5, in one embodiment, the collecting tray 800 is provided with a connection hole 810, the connection hole 810 is respectively communicated with the accommodating cavity 130 and the filling hole 110, and the first explosion-proof valve 400 sequentially penetrates through the filling hole 110 and the connection hole 810. It can be understood that the electrolyte enters the winding core 700 through the injection hole 110 and the connection hole 810, and after the injection is completed, the first explosion-proof valve 400 is plugged into the injection hole 110 and the connection hole 810 to perform a sealing function, and the first explosion-proof valve 400 is welded with the housing 100.
As shown in fig. 4 and 5, in one embodiment, a liquid inlet channel 710 is formed in the middle of the winding core 700, and the liquid inlet channel 710 is disposed corresponding to the connection hole 810 and the liquid injection hole 110. It can be appreciated that the electrolyte sequentially passes through the injection hole 110 and the connection hole 810, then enters the liquid inlet channel 710, and then infiltrates from the liquid inlet channel 710 to the periphery of the winding core 700.
Compared with the prior art, the utility model has at least the following advantages:
foretell battery housing structure, annotate the liquid hole has been seted up to the tip of casing, and first explosion-proof valve sets up in annotating the liquid downthehole and is connected with the casing, and the explosion-proof valve of second sets up on the apron for the inside gaseous that produces of battery can flow from first explosion-proof valve and explosion-proof valve of second respectively, has shortened gaseous transmission distance, has avoided the risk of battery burst, has improved the security performance of battery.
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 battery shell structure comprises a cover plate and a shell, wherein the cover plate is connected with the shell, the cover plate and the shell form a containing cavity together, the containing cavity is used for containing the winding core,
the battery shell structure further comprises a first explosion-proof valve and a second explosion-proof valve, the end part of the shell is provided with a liquid injection hole, the liquid injection hole is communicated with the accommodating cavity, the first explosion-proof valve is arranged in the liquid injection hole and connected with the shell, and the second explosion-proof valve is connected with the cover plate.
2. The battery case structure according to claim 1, wherein the cover plate is provided with a through hole, the through hole is communicated with the accommodating cavity, and the second explosion-proof valve is arranged in the through hole and connected with the cover plate; and/or the number of the groups of groups,
the liquid injection hole is formed in the middle of the end part of the shell.
3. The battery housing structure according to claim 1, wherein the housing is provided with an embedded groove, the embedded groove is communicated with the liquid injection hole, and the first explosion-proof valve is located in the embedded groove and connected with the housing.
4. The battery housing structure according to claim 3, wherein the first explosion-proof valve comprises a connecting portion and a plugging portion, the connecting portion is arranged in the liquid injection hole in a penetrating manner, and the connecting portion is arranged in the embedded groove and connected with the housing.
5. The battery housing structure of claim 1, wherein the first explosion-proof valve has a T-shaped cross section.
6. The battery housing structure of claim 1, further comprising a cap assembly connected to the cover plate, the cap assembly being spaced from the second explosion-proof valve.
7. The battery case structure according to claim 6, wherein the cover plate is provided with a mounting hole, and the top cap assembly is penetrated through the mounting hole and connected with the cover plate.
8. A cylindrical battery, characterized by comprising a winding core, a current collecting disc and a battery shell structure according to any one of claims 1 to 7, wherein the winding core is positioned in the accommodating cavity, the winding core is connected with the current collecting disc, and the current collecting disc is connected with the shell.
9. The cylindrical battery of claim 8, wherein the current collecting plate is provided with a connecting hole, the connecting hole is respectively communicated with the accommodating cavity and the liquid injection hole, and the first explosion-proof valve sequentially penetrates through the liquid injection hole and the connecting hole.
10. The cylindrical battery according to claim 9, wherein a liquid inlet channel is formed in the middle of the winding core, and the liquid inlet channel is arranged corresponding to the connecting hole and the liquid injection hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321258823.5U CN220382265U (en) | 2023-05-22 | 2023-05-22 | Battery shell structure and cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321258823.5U CN220382265U (en) | 2023-05-22 | 2023-05-22 | Battery shell structure and cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220382265U true CN220382265U (en) | 2024-01-23 |
Family
ID=89564701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321258823.5U Active CN220382265U (en) | 2023-05-22 | 2023-05-22 | Battery shell structure and cylindrical battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220382265U (en) |
-
2023
- 2023-05-22 CN CN202321258823.5U patent/CN220382265U/en active Active
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