CN220585428U - Battery monomer and battery - Google Patents
Battery monomer and battery Download PDFInfo
- Publication number
- CN220585428U CN220585428U CN202322146918.4U CN202322146918U CN220585428U CN 220585428 U CN220585428 U CN 220585428U CN 202322146918 U CN202322146918 U CN 202322146918U CN 220585428 U CN220585428 U CN 220585428U
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- CN
- China
- Prior art keywords
- explosion
- proof valve
- main
- battery
- auxiliary
- 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.)
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- 239000000178 monomer Substances 0.000 title claims abstract description 12
- 238000004880 explosion Methods 0.000 abstract description 15
- 238000005336 cracking Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000241 respiratory effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 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 utility model discloses a battery monomer and a battery, and belongs to the technical field of batteries. The anti-explosion device comprises a shell and a cover plate, wherein a pole is arranged on the cover plate, a main anti-explosion valve and an auxiliary anti-explosion valve are respectively arranged on the shell and the cover plate, the opening pressure of the main anti-explosion valve is smaller than that of the auxiliary anti-explosion valve, and the opening pressure of the auxiliary anti-explosion valve is smaller than the pressure limit bearable by the shell. According to the utility model, the main explosion-proof valve arranged on the shell and the auxiliary explosion-proof valve arranged on the cover plate are arranged, and the opening pressure of the main explosion-proof valve is smaller than that of the auxiliary explosion-proof valve, so that the main explosion-proof valve is preferentially utilized for exhausting and releasing pressure, when the main explosion-proof valve is blocked, the auxiliary explosion-proof valve is opened and participates in releasing pressure after the internal pressure of the battery unit is increased to the opening pressure of the auxiliary explosion-proof valve, the safety of the battery unit is improved, and explosion is prevented.
Description
Technical Field
The utility model belongs to the technical field of lithium batteries, and particularly relates to a battery monomer and a battery.
Background
The square shell power battery is widely applied in the field of new energy at present, and a large number of square shell structures are adopted in the NCM ternary or LFP iron lithium batteries. The shell of the square shell battery cell is usually of an aluminum alloy or steel structure, and an explosion-proof valve is usually arranged on the shell or the cover plate to ensure the safety of the square shell battery cell.
In the traditional battery structure, the explosion-proof valve needs to be arranged on a cover plate assembly with better rigidity. The problem with this kind of structure lies in that the explosion-proof valve is set up in the homonymy with utmost point post and copper bar, when the security risk of electric core level takes place, and the explosion-proof valve needs to open, the plasma jet of blowout easily causes the short circuit of system level, and then probably causes the thermal runaway of battery package system level.
An alternative is therefore to provide the explosion protection valve on the housing. However, because the battery core in the casing is easy to expand in the use process, once the expanded battery core is used for plugging the explosion-proof valve, the normal opening of the explosion-proof valve is directly influenced, so that the explosion-proof valve cannot exert the functions of quick exhaust and pressure relief, and larger potential safety hazards can be brought.
Disclosure of Invention
1. Problems to be solved
Aiming at the problems that in the prior art, an explosion-proof valve is arranged on a shell, and the explosion-proof valve is easy to block after an electric core expands, so that the explosion-proof valve cannot normally function, and potential safety hazards are brought, the utility model provides a battery cell and a battery.
2. Technical proposal
In order to solve the problems, the utility model adopts the following technical scheme.
The utility model provides a battery monomer, includes casing and apron, be provided with the utmost point post on the apron, be provided with main explosion-proof valve and auxiliary explosion-proof valve on casing and the apron respectively, the cracking pressure of main explosion-proof valve is less than the cracking pressure of auxiliary explosion-proof valve, the cracking pressure of auxiliary explosion-proof valve is less than the pressure limit that the casing can bear. Through setting up main explosion-proof valve and the auxiliary explosion-proof valve of two different positions, and put auxiliary explosion-proof valve on being difficult for being out of shape and be difficult for by the apron of electric core shutoff, can realize by the preferential pressure release of exhausting of main explosion-proof valve, if main explosion-proof valve is shutoff or exhaust rate is slower than the gas production rate in the casing, then casing internal pressure increases, auxiliary explosion-proof valve reaches the cracking pressure to explode and participate in exhausting, improve the free security of battery, prevent the potential safety hazard of explosion.
Further, the area of the opening area of the main explosion-proof valve is 200-1000 mm 2 The area of the opening area of the auxiliary explosion-proof valve is 5-100 mm 2 . The opening pressure of the main explosion-proof valve is smaller than that of the auxiliary explosion-proof valve, so that when the internal pressure of the battery unit rises, the main explosion-proof valve is firstly opened for pressure relief, and most of electrolyte and gas are rapidly discharged by the main explosion-proof valve due to the large area of the opening area of the main explosion-proof valve. Because auxiliary explosion-proof valve sets up on the apron, the pressure release can bring the potential safety hazard to the electric connection spare in the battery package from here, therefore the design purpose of this scheme is the explosion-proof valve on the preferential opening casing when the pressure release, let gaseous follow the battery package on correspond the exhaust passage exhaust of main explosion-proof valve and not get into the battery package inside, only when main explosion-proof valve is plugged, the pressure release is not rapid enough, battery monomer internal pressure further risees and reaches auxiliary explosion-proof valve's opening pressure, auxiliary explosion-proof valve just opens and participates in the pressure release, improve battery monomer security, prevent explosion.
Further, the opening pressure of the main explosion-proof valve is 0.6-0.9 Mpa, and the opening pressure of the auxiliary explosion-proof valve is 0.1-0.5 Mpa higher than that of the main explosion-proof valve.
Further, the area of the opening area of the main explosion-proof valve is smaller than 200mm 2 . In view of the fact that the main explosion-proof valve is arranged on the shell, respiratory effect can be generated in the use process of charging and discharging of the battery, and further fatigue strength of the notch of the explosion-proof valve is easily reduced, the valve is easily opened in advance, and the service life of the battery is influenced. The area of the main explosion-proof valve is set to be smaller than 200mm 2 The influence of the deformation of the shell on the fatigue strength of the notch of the main explosion-proof valve is reduced.
Further, the casing is square and both ends opening, the apron is two, and seals the both ends of casing respectively, main explosion-proof valve sets up on the narrow lateral wall of casing lower extreme, supplementary explosion-proof valve sets up on one of them apron at least. The structural strength of the narrow side wall of the shell is larger than that of the wide side surface, and the influence of the deformation of the shell on the explosion-proof valve is reduced. When the battery is used on an automobile, the main explosion-proof valve is arranged on the bottom surface of the shell, so that the influence on the automobile cabin when the main explosion-proof valve is depressurized can be reduced; in addition, the bottom of the battery pack is convenient to set an exhaust channel, the main explosion-proof valve is arranged on the bottom surface of the shell, the exhaust channel is convenient to be utilized for pressure relief, and the influence on the inside of the battery pack is reduced.
Further, the main explosion-proof valve is arranged close to the cover plate. The expansion degree of the battery cell is smaller than that of the battery cell in the middle of the battery cell, so that the risk that the main explosion-proof valve is blocked by the expansion of the battery cell can be reduced.
Further, the top side of the shell is opened, the cover plate seals the opening of the shell, and the main explosion-proof valve is arranged on the narrow side walls at the two ends of the shell.
Further, the main explosion-proof valve and the auxiliary explosion-proof valve are round or racetrack in shape.
The application also provides a battery, which comprises the battery monomer.
3. Advantageous effects
Compared with the prior art, the utility model has the beneficial effects that:
(1) According to the utility model, the main explosion-proof valve arranged on the shell and the auxiliary explosion-proof valve arranged on the cover plate are arranged, and the opening pressure of the main explosion-proof valve is smaller than that of the auxiliary explosion-proof valve, so that the main explosion-proof valve is preferentially utilized for exhausting and releasing pressure, when the main explosion-proof valve is blocked, the auxiliary explosion-proof valve is opened and participates in releasing pressure after the internal pressure of the battery unit is increased to the opening pressure of the auxiliary explosion-proof valve, the safety of the battery unit is improved, and explosion is prevented;
(2) The area of the main explosion-proof valve is smaller than 200mm 2 The structural strength of the main explosion-proof valve can be improved, and the fatigue strength of the shell deformation to the notch of the main explosion-proof valve can be reducedIs a function of (1);
(3) According to the utility model, the main explosion-proof valve is arranged close to the cover plate, so that the risk that the main explosion-proof valve is blocked by the expansion of the battery cell can be reduced.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of a battery cell according to the present utility model;
fig. 2 is a schematic structural view of a second embodiment of a battery cell according to the present utility model;
fig. 3 is a schematic structural view of a third embodiment of a battery cell according to the present utility model.
In the figure: 1. a housing; 2. a cover plate; 3. a pole; 4. a main explosion-proof valve; 5. an auxiliary explosion-proof valve.
Detailed Description
Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.
The utility model is described in detail below with reference to fig. 1-3.
Example 1
Referring to fig. 1, a battery unit includes a casing 1 and a cover plate 2, a pole 3 is disposed on the cover plate 2, a main explosion-proof valve 4 and an auxiliary explosion-proof valve 5 are disposed on the casing 1 and the cover plate 2 respectively, the opening pressure of the main explosion-proof valve 4 is smaller than the opening pressure of the auxiliary explosion-proof valve 5, and the opening pressure of the auxiliary explosion-proof valve 5 is smaller than the pressure limit bearable by the casing 1. Through setting up main explosion-proof valve 4 and auxiliary explosion-proof valve 5 of two different positions, and put auxiliary explosion-proof valve 5 on be difficult for being out of shape and be difficult for by the apron 2 of electric core shutoff, can realize by main explosion-proof valve 4 preferential exhaust pressure release, if main explosion-proof valve 4 is shutoff or exhaust rate is slower than the gas production rate in the casing 1, then casing 1 internal pressure increases, auxiliary explosion-proof valve 5 reaches the cracking pressure to explode and participate in the exhaust, improve the free security of battery, reduce the potential safety hazard of explosion.
The area of the opening area of the main explosion-proof valve 4 is 100-1000 mm 2 The area of the opening area of the auxiliary explosion-proof valve 5 is 5-100 mm 2 . Because the opening pressure of the main explosion-proof valve 4 is smaller than that of the auxiliary explosion-proof valve 5, when the internal pressure of the battery cell rises, the main explosion-proof valve 4 is firstly opened for pressure relief, and because the area of the opening area of the main explosion-proof valve 4 is larger, most of electrolyte and gas are rapidly discharged by the main explosion-proof valve 4. Because auxiliary explosion-proof valve 5 sets up on apron 2, this place pressure release can bring the potential safety hazard to the electric connection spare in the battery package, therefore the main explosion-proof valve 4 on the casing 1 is opened to priority when the pressure release to the design purpose of this scheme, let gaseous follow the battery package on correspond the exhaust passage of main explosion-proof valve 4 discharge and not get into the battery package inside, only main explosion-proof valve 4 is shutoff, the pressure release is not rapid enough, when the inside pressure of battery monomer further risees and reaches auxiliary explosion-proof valve 5's opening pressure, auxiliary explosion-proof valve 5 just opens and participate in the pressure release, improve the free security of battery, prevent to explode.
The two ends of the shell 1 are opened, the two cover plates 2 are respectively used for sealing the two ends of the shell 1, the main explosion-proof valve 4 is arranged on the narrow side wall of the lower end of the shell 1, namely on the bottom surface of the shell 1, and the auxiliary explosion-proof valve 5 is at least arranged on one of the cover plates 2. The structural strength of the narrow side wall of the shell 1 is larger than that of the wide side surface, and the influence of the deformation of the shell 1 on the explosion-proof valve is reduced. When the battery is used on an automobile, the main explosion-proof valve 4 is arranged on the bottom surface of the shell, so that the influence on the automobile cabin when the main explosion-proof valve 4 is depressurized can be reduced; in addition, the bottom of the battery pack is convenient to set an exhaust channel, the main explosion-proof valve 4 is arranged on the bottom surface of the shell 1, pressure relief is convenient to conduct through the exhaust channel, and influences on the inside of the battery pack are reduced.
Example 2
Referring to fig. 2, the present embodiment is different from the first embodiment in that the area of the opening area of the main explosion-proof valve is less than 200mm 2 . In view of the fact that the main explosion-proof valve 4 is arranged on the shell 1, respiratory effect can be generated during the use process of charging and discharging of the battery, so that fatigue strength of the notch of the explosion-proof valve on the main explosion-proof valve is easily reduced, the valve is easily opened in advance, and the battery is influencedAnd the service life is prolonged. The area of the main explosion valve 4 is set to be less than 200mm 2 To reduce the effect of the deformation of the housing on the fatigue strength of the main explosion valve 4 score.
The opening pressure of the main explosion-proof valve 4 is 0.6-0.9 Mpa, and the opening pressure of the auxiliary explosion-proof valve 5 is 0.1-0.5 Mpa higher than that of the main explosion-proof valve 4.
The main explosion valve 4 is arranged close to the cover plate 2. Because the cell in the battery cell can expand in the use process, the expansion part is important to be the middle part of the cell, and the end part close to the cover plate 2 is not easy to expand, so that the main explosion-proof valve 4 is arranged at the position close to the cover plate 2, and the influence of the expansion of the cell on the main explosion-proof valve 4 can be reduced. The appearance of main explosion-proof valve and supplementary explosion-proof valve is circular or runway formula, and when the appearance of main explosion-proof valve 4 was circular, the effect was good, because circular explosion-proof valve receives battery monomer respiratory effect influence little, stable in structure, and the fatigue strength of nick on it is better.
Example 3
Referring to fig. 3, this embodiment is different from the above embodiment in that the top side of the housing 1 is opened, the cover plate 2 closes the opening of the housing 1, the main explosion-proof valve 4 is provided on the narrow side walls of both ends of the housing 1, and the auxiliary explosion-proof valve 5 is provided on the cover plate 2.
The utility model also provides a battery, which comprises the battery monomer.
The above examples are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the present utility model.
Claims (9)
1. The utility model provides a battery monomer, includes casing and apron, its characterized in that: the explosion-proof device is characterized in that a main explosion-proof valve and an auxiliary explosion-proof valve are respectively arranged on the shell and the cover plate, the opening pressure of the main explosion-proof valve is smaller than that of the auxiliary explosion-proof valve, and the opening pressure of the auxiliary explosion-proof valve is smaller than the pressure limit bearable by the shell.
2. The battery cell of claim 1, wherein: the area of the opening area of the main explosion-proof valve is 100-1000 mm 2 The area of the opening area of the auxiliary explosion-proof valve is 5-100 mm 2 。
3. The battery cell of claim 2, wherein: the area of the opening area of the main explosion-proof valve is smaller than 200mm 2 。
4. The battery cell according to claim 2, wherein the opening pressure of the main explosion-proof valve is 0.6 to 0.9Mpa, and the opening pressure of the auxiliary explosion-proof valve is 0.1 to 0.5Mpa higher than the main explosion-proof valve.
5. The battery cell of claim 4, wherein: the casing is square and both ends opening, the apron is two, and seals the both ends of casing respectively, main explosion-proof valve sets up on the narrow lateral wall of casing lower extreme, supplementary explosion-proof valve sets up on one of them apron at least.
6. The battery cell of claim 1, wherein: the main explosion-proof valve is arranged close to the cover plate.
7. The battery cell of claim 4, wherein: the top of casing one side opening, the apron seals the casing opening, main explosion-proof valve sets up on the narrow lateral wall at the both ends of casing.
8. The battery cell of claim 4, wherein: the main explosion-proof valve and the auxiliary explosion-proof valve are round or racetrack in shape.
9. A battery, characterized in that: comprising a battery cell according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322146918.4U CN220585428U (en) | 2023-08-08 | 2023-08-08 | Battery monomer and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322146918.4U CN220585428U (en) | 2023-08-08 | 2023-08-08 | Battery monomer and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220585428U true CN220585428U (en) | 2024-03-12 |
Family
ID=90121488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322146918.4U Active CN220585428U (en) | 2023-08-08 | 2023-08-08 | Battery monomer and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220585428U (en) |
-
2023
- 2023-08-08 CN CN202322146918.4U patent/CN220585428U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |