CN215527840U - Lithium battery protection device - Google Patents
Lithium battery protection device Download PDFInfo
- Publication number
- CN215527840U CN215527840U CN202121633977.9U CN202121633977U CN215527840U CN 215527840 U CN215527840 U CN 215527840U CN 202121633977 U CN202121633977 U CN 202121633977U CN 215527840 U CN215527840 U CN 215527840U
- Authority
- CN
- China
- Prior art keywords
- shell
- lithium battery
- explosion
- protection device
- battery protection
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 49
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000006073 displacement reaction Methods 0.000 claims abstract description 9
- 238000005192 partition Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000004880 explosion Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 description 19
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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 invention discloses a lithium battery protection device which comprises a first shell for accommodating a lithium battery, wherein the top of the first shell is hollow, a notch is formed in the side wall of the first shell, an explosion-proof film is arranged at the notch, a positioning piece which is transversely arranged is arranged on the inner side of the side wall of the first shell and abuts against the lithium battery accommodated in the first shell, a second shell is further arranged on the periphery of the first shell, a displacement sensor is arranged on the side wall of the second shell and faces the explosion-proof film, an air pressure sensor is arranged between the first shell and the second shell, and a cover plate is arranged above the first shell and the second shell. The invention is provided with the multilayer shell, and the sensor is arranged on the multilayer shell, so that the monitoring of air expansion and pressure change in the shell is realized, the explosion of the lithium battery in the shell is prevented, and meanwhile, the arrangement of the explosion-proof film arranged on the first shell and the second explosion-proof film arranged on the protruding cavity of the cover plate realizes the function of step-by-step alarm, and the explosion prevention effect is better.
Description
Technical Field
The invention relates to the technical field of lithium battery protection, in particular to a lithium battery protection device.
Background
A lithium battery is a type of battery using a nonaqueous electrolyte solution, using lithium metal or a lithium alloy as a positive/negative electrode material. However, the existing lithium battery also has a certain explosion risk, and one of the main reasons includes that the pole piece absorbs water and reacts with the electrolyte to generate air bubbles, the lithium battery expands before explosion, and the exploded lithium battery can damage people or objects around.
Disclosure of Invention
The invention aims to provide a lithium battery protection device which has a simple structure and carries out explosion protection on a lithium battery aiming at the defects in the prior art.
In order to achieve the purpose, the invention provides a lithium battery protection device, which adopts the following technical scheme:
the utility model provides a lithium battery protection device, includes the first casing of holding lithium cell, first casing top is empty, seted up the breach on the lateral wall of first casing, breach department is provided with the rupture membrane, the lateral wall inboard of first casing is provided with transversely lays the setting element, the setting element supports the lithium cell of holding in the first casing, first casing periphery still is provided with the second casing, be provided with displacement sensor on the lateral wall of second casing, displacement sensor faces to the rupture membrane, first casing is provided with baroceptor between the second casing, first casing and second casing top are provided with the apron.
The lithium battery protection device is further improved in that the positioning piece comprises a first rod section fixed on the side wall of the first shell, a second rod section is inserted into the first rod section, the first rod section is provided with an insertion hole, and a positioning pin is arranged at the insertion hole.
The lithium battery protection device is further improved in that a protruding cavity is formed in the middle of the cover plate in an upward protruding mode, a second explosion-proof film is arranged on the lower portion of the protruding cavity, an arc-shaped elastic piece is arranged in the protruding cavity, the protruding end of the elastic piece is close to the second explosion-proof film, and a pressure sensor is arranged on the elastic piece.
The lithium battery protection device is further improved in that the protruding cavity is provided with an air release hole, the cover plate is provided with a second air release hole, and the second air release hole is positioned between the first shell and the second shell.
The lithium battery protection device is further improved in that a partition plate is arranged at the lower part of the second shell, and water is filled between the partition plate and the bottom of the second shell.
The lithium battery protection device is further improved in that a third shell is arranged on the periphery of the second shell, and the third shell is an explosion-proof plate.
Compared with the prior art, the invention has the beneficial effects that:
the invention is provided with the multilayer shell, and the sensor is arranged on the multilayer shell, so that the monitoring of air expansion and pressure change in the shell is realized, the explosion of the lithium battery in the shell is prevented, and meanwhile, the arrangement of the explosion-proof film arranged on the first shell and the second explosion-proof film arranged on the protruding cavity of the cover plate realizes the function of step-by-step alarm, and the explosion prevention effect is better.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: the explosion-proof device comprises a first shell, a notch 2, an explosion-proof membrane 3, a positioning piece 4, a second shell 5, a displacement sensor 6, an air pressure sensor 7, a cover plate 8, a protruding cavity 9, a second explosion-proof membrane 10, an elastic piece 11, a pressure sensor 12, a partition plate 13 and a third shell 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a lithium battery protection device includes a first casing 1 for accommodating a lithium battery, the top of the first casing 1 is hollow, a notch 2 is formed in a side wall of the first casing 1, an explosion-proof membrane 3 is arranged at the notch 2, a positioning member 4 transversely arranged is arranged on an inner side of the side wall of the first casing 1, the positioning member 4 abuts against the lithium battery accommodated in the first casing, a second casing 5 is further arranged on the periphery of the first casing 1, a displacement sensor 6 is arranged on a side wall of the second casing 5, the displacement sensor 6 faces the explosion-proof membrane 3, an air pressure sensor 7 is arranged between the first casing 1 and the second casing 5, and a cover plate 8 is arranged above the first casing and the second casing.
Specifically, the positioning element 4 comprises a first rod section fixed on the side wall of the first shell, a second rod section is inserted into the first rod section, an insertion hole is formed in the first rod section, and a positioning pin is arranged at the insertion hole. The setting element realizes spacing of lithium cell or lithium cell group, and the setting element that can adjust can be applicable to the lithium cell of equidimension not, and the suitability is stronger.
Specifically, 8 middle parts of apron upwards bulge and are formed with protrusion chamber 9, protrusion chamber 9 lower part is equipped with second rupture membrane 10, be provided with in the protrusion chamber 9 and be curved elastic component 11, the protrusion end of elastic component is close to second rupture membrane 10, be equipped with pressure sensor 12 on the elastic component, the rupture membrane is more excellent than second rupture membrane. The second explosion-proof membrane 10 on the bulge cavity 9 is matched with the explosion-proof membrane 3 on the first shell 1, so that the air expansion grading treatment of the lithium battery is realized, and a better treatment effect is ensured. Furthermore, be provided with the disappointing hole on the protruding chamber, be provided with the disappointing hole of second on the apron, the disappointing hole of second is located between first casing and the second casing. The air release hole can be provided with a valve.
Further, a partition plate 13 is arranged at the lower part of the second shell, and water is filled between the partition plate 13 and the bottom of the second shell 5. The partition plate 13 is made of a material with a good heat conduction effect, further heat dissipation of air in the second shell is achieved through water, and explosion of the lithium battery is effectively prevented. Further, a third shell 14 is arranged on the periphery of the second shell, and the third shell is an explosion-proof plate. And the last protection process is carried out on the lithium battery, so that the influence of the explosion of the lithium battery on the outside is reduced.
The displacement sensor, the air pressure sensor and the pressure sensor are electrically connected with different alarm bells.
The working principle of the invention is as follows: the lithium battery works to generate heat, the heat can enable air to expand, a certain distance is reserved between the lithium battery and the first shell to play a certain buffering role, if the heat is continuously increased, the air is continuously expanded, the explosion-proof membrane and the second explosion-proof membrane are extruded by the expansion of the air, the second explosion-proof membrane is pressed to abut against the elastic piece, the pressure sensor on the elastic piece monitors the pressure and then sends out a first alarm, because the second explosion-proof membrane has poor explosion-proof effect, the second explosion-proof membrane is firstly broken, the air in the protruding cavity can be buffered again, the valve on the air leakage hole is controlled to be opened at the moment, the safety of the lithium battery is ensured, if the air is continuously re-expanded, the explosion-proof membrane can be broken, and when the displacement sensor monitors that the explosion-proof membrane reaches an extreme value, a second alarm is sent out, at the moment, the lithium battery is controlled to stop working, and the second air leakage hole on the cover plate is controlled to be opened, when the air continues to expand and the pressure reaches the alarm value monitored by the air pressure sensor, the air pressure sensor sends out three-time alarm to remind people of keeping away from the lithium battery, and effective explosion-proof prevention is carried out.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a lithium battery protection device which characterized in that: the lithium battery explosion-proof device comprises a first shell for accommodating a lithium battery, wherein the top of the first shell is hollow, a notch is formed in the side wall of the first shell, an explosion-proof film is arranged at the notch, a positioning piece transversely arranged is arranged on the inner side of the side wall of the first shell and abuts against the lithium battery accommodated in the first shell, a second shell is further arranged on the periphery of the first shell, a displacement sensor is arranged on the side wall of the second shell and faces the explosion-proof film, a pressure sensor is arranged between the first shell and the second shell, and cover plates are arranged above the first shell and the second shell.
2. A lithium battery protection device according to claim 1, characterized in that: the locating piece is including being fixed in the first pole section of first casing lateral wall, first pole section interpolation is equipped with the second pole section, be equipped with the jack on the first pole section, jack department is provided with the locating pin.
3. A lithium battery protection device according to claim 1, characterized in that: the cover plate is characterized in that a protruding cavity is formed in the middle of the cover plate in an upward protruding mode, a second explosion-proof film is arranged on the lower portion of the protruding cavity, an arc-shaped elastic piece is arranged in the protruding cavity, the protruding end of the elastic piece is close to the second explosion-proof film, and a pressure sensor is arranged on the elastic piece.
4. A lithium battery protection device according to claim 3, characterized in that: the protruding cavity is provided with an air leakage hole, the cover plate is provided with a second air leakage hole, and the second air leakage hole is located between the first shell and the second shell.
5. A lithium battery protection device according to claim 1, characterized in that: and a partition plate is arranged at the lower part of the second shell, and water is filled between the partition plate and the bottom of the second shell.
6. A lithium battery protection device according to claim 1, characterized in that: and a third shell is arranged on the periphery of the second shell and is an explosion-proof plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121633977.9U CN215527840U (en) | 2021-07-16 | 2021-07-16 | Lithium battery protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121633977.9U CN215527840U (en) | 2021-07-16 | 2021-07-16 | Lithium battery protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215527840U true CN215527840U (en) | 2022-01-14 |
Family
ID=79813825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121633977.9U Expired - Fee Related CN215527840U (en) | 2021-07-16 | 2021-07-16 | Lithium battery protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215527840U (en) |
-
2021
- 2021-07-16 CN CN202121633977.9U patent/CN215527840U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |