CN112002854B - Explosion-proof battery - Google Patents
Explosion-proof battery Download PDFInfo
- Publication number
- CN112002854B CN112002854B CN202010676685.7A CN202010676685A CN112002854B CN 112002854 B CN112002854 B CN 112002854B CN 202010676685 A CN202010676685 A CN 202010676685A CN 112002854 B CN112002854 B CN 112002854B
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- Prior art keywords
- box body
- explosion
- pressure
- battery module
- pouring layer
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- 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
Abstract
The application provides an explosion-proof battery, includes: a first box and a second box; the battery module is arranged in the first box body and comprises a first area and a second area, the first area comprises all electrodes in the battery module, and the second area comprises all pressure relief valves in the battery module; the power supply control module is arranged in the second box body; the first pressure relief device is arranged between the first box body and the second box body and used for relieving the pressure in the first box body to the second box body; and the second pressure relief device is arranged in the second box body and used for releasing the pressure in the second box body to the outside so as to realize the explosion-proof protection of the battery module.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to an explosion-proof battery.
Background
With the increasing demand for the capacity of storage batteries and the decreasing demand for the volume of various electronic and electrical devices used in explosive mixture environments, the current industrial production tends to select lithium ion batteries with higher energy density. However, the higher the energy density of the battery, the more factors affecting the safety of use thereof, and thus, the explosion protection requirements for lithium ion batteries used in explosive mixture environments are also more stringent.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention provides an explosion-proof battery to realize explosion-proof protection of a battery module.
To achieve the above object, the present invention provides an explosion-proof battery, including: a first box and a second box;
the battery module is arranged in the first box body and comprises a first area and a second area, the first area comprises all electrodes in the battery module, and the second area comprises all pressure relief valves in the battery module;
the power supply control module is arranged in the second box body;
the first pressure relief device is arranged between the first box body and the second box body and used for relieving the pressure in the first box body to the second box body;
the second pressure relief device is arranged in the second box body and used for relieving the pressure in the second box body to the outside;
the first pouring layer covers the first area of the battery module, and is provided with a first opening corresponding to the pressure release valve, so that the pressure release valve can exhaust gas through the first opening;
the second pouring layer at least covers the second area of the battery module, wherein the impact strength of the second pouring layer is smaller than that of the pressure relief valve when the pressure relief valve is opened, so that the pressure relief valve breaks through the second pouring layer when the pressure relief valve is opened, the second pouring layer also covers the first area, and the impact strength of the second pouring layer is smaller than that of the first pouring layer;
a third pouring layer covering the second pouring layer, wherein the third pouring layer is provided with a second opening at the position of the pressure release valve, the second opening corresponds to the pressure release valve so that the pressure release valve can exhaust gas through the second opening, the impact strength of the third pouring layer is greater than that of the first pouring layer, and the first pouring layer, the second pouring layer and the third pouring layer are made of silica gel or epoxy resin;
a free space exists between the pouring layer covering the battery module and the explosion-proof cover;
a first pressure sensor disposed in the first tank;
a second pressure sensor disposed within the second tank, wherein a pressure threshold of the second pressure sensor is less than a pressure threshold of the first pressure sensor;
the first supporting piece is arranged in the first box body and used for supporting and fixing the battery module;
and the second supporting piece is arranged in the second box body and is used for supporting and fixing the power supply control module.
In some embodiments, the first and/or second enclosure is an explosion-proof enclosure, the explosion-proof enclosure comprising:
a box body;
the explosion-proof cover is arranged on the box body, and the explosion-proof cover is connected with the box body through a bolt.
In some embodiments, the first box body and the second box body are electrically connected through a first lead device, so that the battery module and the power supply control module are electrically connected;
and a second lead device is arranged on the second box body so that the power supply control module is electrically connected with an external circuit.
In some embodiments, a free space exists between the potting layer covering the battery module and the explosion-proof cover.
In some embodiments, the first potting layer, the second potting layer, and the third potting layer fill the space between the battery module and the side walls and the bottom of the first case to closely fit the first case and fix the battery module.
This application can form the second grade and release through setting up pressure relief device between first box and second box and on the second box respectively to take place the pressure that faults such as thermal runaway lead to the relief valve to open through releasing step by step and effectively reduce battery module gas outgoing and produce when the battery, prevent to destroy the casing of last one deck level, more can not lead to the fact explosive extreme harm to the external environment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of an explosion-proof battery according to a first embodiment of the present invention;
fig. 2 is a schematic structural view of an explosion-proof battery according to a second embodiment of the present invention;
fig. 3 is a schematic structural view of an explosion-proof battery according to a third embodiment of the present invention;
fig. 4 is a schematic structural view of an explosion-proof battery according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural view of an explosion-proof battery according to a fifth embodiment of the present invention;
fig. 6 is a schematic structural view of an explosion-proof battery according to a sixth embodiment of the present invention;
fig. 7 is a schematic structural view of an explosion-proof battery according to a seventh embodiment of the present invention;
reference numerals:
the explosion-proof battery 1, the box body 101 and the explosion-proof cover 102;
the battery module comprises a first box body 10, a first pouring seal layer 11, a second pouring seal layer 12, a third pouring seal layer 13, a battery module 30, an electrode 31, a pressure release valve 32, a first support 33 and a first pressure sensor 71;
the power supply control module 40 comprises a second box 20, a first lead device 21, a second lead device 22, a power supply control module 40, a second support 41, a first pressure relief device 50, a second pressure relief device 60 and a second pressure sensor 72.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An explosion-proof battery according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of an explosion-proof battery according to a first embodiment of the present invention. As shown in fig. 1, an explosion-proof battery 1 in the embodiment of the present invention includes: the battery pack includes a first case 10, a second case 20, a battery module 30 power control module 40, a first pressure relief device 50, and a second pressure relief device 60.
The battery modules 30 are disposed in the first casing 10, the battery modules 30 include a first region and a second region, the first region includes all the electrodes 31 in the battery modules 30, and the second region includes all the pressure relief valves 32 in the battery modules 30.
It should be understood that the battery module 30 may be formed by connecting single lithium batteries in series or in parallel, each single lithium battery has a positive electrode 31 and a negative electrode 31, when N single lithium batteries are disposed in the battery module 30, N is an integer greater than 1, and in this case, the first region includes all the electrodes 31 in the battery module 30. Similarly, the second region includes all the pressure relief valves 32 in the battery module 30.
In general, explosion of a battery means that a lithium battery undergoes a failure such as thermal runaway, and the internal pressure of the battery rapidly increases until the battery breaks through a case covering the battery and explodes. Consequently, can have the relief valve on the large capacity lithium cell usually, when can making the inside gas pressure of battery reach the predetermined threshold value of relief valve, can effectively avoid the battery to explode through opening the relief valve with the inside gas of battery to the battery outside.
The power control module 40 is disposed in the second housing 20.
The power control module 40 is electrically connected to the battery module 30, and the battery control module 40 is used for controlling and monitoring the charging and discharging states of the battery module 30.
Specifically, as shown in fig. 2, the first casing 10 and the second casing 20 are electrically connected to each other through the first lead wire device 21 so that the battery module 30 is electrically connected to the power control module 40. For example, the electric control wire between the power control module 40 and the battery module 30 passes through the case between the first case 10 and the second case 20 through the first lead device 21.
It should be understood that the second casing 20 may be further provided with a second lead device 22 communicating with the outside so as to electrically connect the power control module 40 with an external circuit, wherein the external circuit may be a control circuit of the electric equipment, so that the power control module 40 can control the charging and discharging of the battery module 30 according to the demand of the electric power.
Wherein the first and second lead means 21, 22 may consist of one or more glan heads.
The first pressure relief device 50 is provided between the first tank 10 and the second tank 20, and is used to relieve the pressure in the first tank 10 to the second tank 20.
The second pressure relief device 60 is provided on the second tank 20 for relieving pressure in the second tank 20 to the outside.
Further, although the battery module 30 discharges the gas generated inside to the outside of the battery module 30 through the relief valve 32, since the first case 10 is a sealed structure, the gas pressure inside the first case 10 gradually increases as the gas of the battery module 30 continuously increases, which may cause an explosion risk. Therefore, the first pressure relief device 50 is further arranged between the first box 10 and the second box 20 in the embodiment of the application, so that the pressure in the first box 10 can be relieved into the second box 20, and the risk of explosion of the first box 10 is effectively reduced. Meanwhile, the buffer space formed by the second box body 20 effectively reduces the pressure of the gas to be discharged and reduces the overall explosion danger of the explosion-proof battery.
Further, this application still sets up second pressure relief device 60 among second box 20 for the gas that battery module 30 produced can finally be released to the outside of explosion-proof battery 1 through second relief valve 60, promptly, makes the gas that battery module 30 produced loop through pressure relief valve 32, first pressure relief device 50 and the outside that explosion-proof battery finally discharged to second pressure relief device 60, effectively prevents explosion-proof battery.
From this, this application forms the second grade through setting up pressure relief device between first box and second box and on the second box respectively and releases to through releasing effectively reducing the casing of battery module 30 gas outgoing's pressure destruction last level step by step, can not cause explosive extreme harm to the external environment more.
Wherein, in the present embodiment, the first pressure relief device 50 and the second pressure relief device 60 may be a valve block consisting of one or more check valves and/or flame arresters.
Further, as shown in fig. 3, the explosion-proof battery 1 further includes a first potting layer 11 and a second potting layer 12.
The first potting layer 11 is used to cover a first area of the battery module 30, and the first potting layer 11 has a first opening corresponding to the pressure release valve 32, so that the pressure release valve 32 can release air through the first opening.
It should be noted that, since a potential ignition source in the battery is an electrified component, that is, the electrode 31 in the battery module 30, the first potting layer 11 covers the first area of the battery module 30, that is, all the electrodes 31 in the battery module 30 are isolated from the gas outside the battery module 30 by the first potting layer 11, so as to effectively prevent the electrode 31 in the battery module 30 from generating electric sparks and further igniting explosive gas in the surrounding environment, thereby causing an explosive hazard.
The second potting layer 12 covers at least a second region of the battery module 30, wherein the impact strength of the second potting layer 12 is smaller than the impact strength of the pressure release valve when the pressure release valve is opened, so that the pressure release valve 32 breaks the second potting layer when the pressure release valve is opened.
That is to say, this application still protects all relief valves 32 in battery module 30 through second encapsulation layer 12 to prevent that relief valve 32 from being broken through by the outside power that comes from battery module 30, thereby influence the pressure environment of battery module 30 inside, cause the battery blasting, effectively improve battery module's reliability.
Simultaneously, the second is watered and is sealed layer 12 and relief valve 32 can be broken by the inside gaseous burst that produces of battery module 30, promptly, and second is watered and is sealed layer 12 and relief valve 32 and can break when battery module 30 internal pressure sharply increases to let out the inside gas of battery module 30 to the battery module 30 outside, avoid the inside gas of battery module 30 to continuously increase, cause the explosion.
Alternatively, the second potting layer 12 may cover the first region in order to further isolate the electrodes 31 in the battery module 30.
The impact strength of the second potting layer 12 is less than that of the first potting layer 11, so that the second potting layer 12 can be easily broken by gas inside the battery module 30, and the purpose of gas release is achieved.
In some embodiments, as shown in fig. 3, the explosion-proof battery 1 further comprises a third potting layer 13, wherein the third potting layer 13 covers the second potting layer 12.
The third pouring layer 13 is provided with a second opening at the pressure release valve 32, the second opening corresponds to the pressure release valve 32, so that the pressure release valve 32 can exhaust gas through the second opening, the impact strength of the third pouring layer 13 is greater than that of the first pouring layer 11, and the first pouring layer 11, the second pouring layer 12 and the third pouring layer 13 are made of silica gel or epoxy resin.
That is to say, this application can effectively limit the destruction degree to second encapsulation layer 12 when relief valve 32 opens through set up third encapsulation layer 13 in the outside of second encapsulation layer 12, promptly, makes the destruction part can be restricted in relief valve department by the at utmost, effectively reduces the destruction influence to first encapsulation layer 11, has improved the reliability of encapsulation protection. Moreover, the manufacturing process of the pouring layer can be simplified by adopting silica gel or epoxy resin, a better pouring protection effect can be ensured, and the method has better practicability and applicability.
Further, the first potting layer 11, the second potting layer 12 and the third potting layer 13 fill the space between the battery module 30 and the side wall and the bottom of the first case 10 to be closely attached to the explosion-proof case body and fix the battery module 30, thereby preventing the battery module from colliding when the explosion-proof battery 1 is moved and causing unnecessary reactions inside the battery module 30.
Further, as shown in fig. 4, the explosion-proof battery 1 further includes a first pressure sensor 71 and a second pressure sensor 72.
Wherein the first pressure sensor 71 is disposed in the first tank 10, the second pressure sensor 72 is disposed in the second tank 30, and a pressure threshold of the second pressure sensor 72 is smaller than that of the first pressure sensor 71.
Specifically, because the pressure threshold value of second pressure sensor 72 is less than the pressure threshold value of first pressure sensor 71, consequently, make gas enter into second box 20 through first pressure relief device 50, receive the pressure after the buffering decompression of second box 20, still can reach the pressure threshold value that triggers second pressure sensor 72, improve pressure detection's accuracy nature, when guaranteeing that box internal pressure risees, power control module group can in time cut off the connection between explosion-proof battery and the external circuit, in time relieve pressure to box internal pressure simultaneously, reduce explosion potential hazard of explosion-proof battery in the at utmost.
In some embodiments, as shown in fig. 5, the first case 10 and/or the second case 20 is an explosion-proof case including: a case body 101 and an explosion-proof cover 102.
Wherein, explosion-proof cover 102 sets up on box body 101, and explosion-proof cover 102 links to each other with box body 101 through the bolt to in time change and maintain battery module 30, practice thrift manufacturing cost.
Further, as shown in fig. 6, a free space 14 exists between the pouring layer covering the battery module 30 and the explosion-proof cover to provide a buffer area for the generated gas after the pressure release valve 32 is opened, thereby avoiding an explosive accident and the like of the explosion-proof box body.
Further, as shown in fig. 7, the explosion-proof battery 1 further includes a first support member 33 provided in the first case 10, the first support member 33 being used to support and fix the battery module 30, a second support member 41 provided in the second case 20, the second support member 41 being used to support and fix the power control module 40.
To sum up, the explosion-proof battery of this application embodiment, this application can cover the electrode of battery module through first seal and the second seal of watering, effectively realize the isolation to the electrode, avoid battery module electrode and ambient gas to produce the electric spark and take place the spontaneous combustion, simultaneously, this application is through setting up pressure relief device between first box and second box and on the second box respectively, form the second grade and release, in order to destroy the casing of last level through the pressure that releases effectively reducing battery module 30 gas outgoing step by step, can more not cause explosive extreme harm to the external environment.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Claims (4)
1. An explosion-proof battery, comprising:
a first box and a second box;
the battery module is arranged in the first box body and comprises a first area and a second area, the first area comprises all electrodes in the battery module, and the second area comprises all pressure relief valves in the battery module;
the power supply control module is arranged in the second box body;
the first pressure relief device is arranged between the first box body and the second box body and used for relieving the pressure in the first box body to the second box body;
the second pressure relief device is arranged in the second box body and used for relieving the pressure in the second box body to the outside;
the first pouring layer covers the first area of the battery module, and is provided with a first opening corresponding to the pressure release valve, so that the pressure release valve can exhaust air through the first opening;
the second pouring layer at least covers the second area of the battery module, wherein the impact strength of the second pouring layer is smaller than that of the pressure relief valve when the pressure relief valve is opened, so that the pressure relief valve breaks through the second pouring layer when the pressure relief valve is opened, the second pouring layer also covers the first area, and the impact strength of the second pouring layer is smaller than that of the first pouring layer;
a third pouring layer covering the second pouring layer, wherein the third pouring layer is provided with a second opening at the position of the pressure release valve, the second opening corresponds to the pressure release valve so that the pressure release valve can exhaust gas through the second opening, the impact strength of the third pouring layer is greater than that of the first pouring layer, and the first pouring layer, the second pouring layer and the third pouring layer are made of silica gel or epoxy resin;
a free space is formed between the pouring layer covering the battery module and the explosion-proof cover;
a first pressure sensor disposed in the first tank;
a second pressure sensor disposed within the second tank, wherein a pressure threshold of the second pressure sensor is less than a pressure threshold of the first pressure sensor;
the first supporting piece is arranged in the first box body and used for supporting and fixing the battery module;
and the second supporting piece is arranged in the second box body and is used for supporting and fixing the power supply control module.
2. The explosion-proof battery as defined in claim 1, wherein the first case and/or the second case is an explosion-proof case, the explosion-proof case comprising:
a box body;
the explosion-proof cover is arranged on the box body, and the explosion-proof cover is connected with the box body through a bolt.
3. The explosion-proof battery as defined in claim 1, further comprising:
the first box body and the second box body are electrically connected with each other through a first lead device, so that the battery module is electrically connected with the power supply control module;
and a second lead device is arranged on the second box body so that the power supply control module is electrically connected with an external circuit.
4. The explosion-proof battery as set forth in claim 1, wherein the first potting layer, the second potting layer and the third potting layer fill the space between the battery module and the side wall and the bottom of the first case so as to be closely attached to the first case and fix the battery module.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676685.7A CN112002854B (en) | 2020-07-14 | 2020-07-14 | Explosion-proof battery |
| PCT/CN2021/104755 WO2022012377A1 (en) | 2020-07-14 | 2021-07-06 | Explosion-proof battery |
| AU2021310148A AU2021310148A1 (en) | 2020-07-14 | 2021-07-06 | Explosion-proof battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676685.7A CN112002854B (en) | 2020-07-14 | 2020-07-14 | Explosion-proof battery |
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| CN112002854A CN112002854A (en) | 2020-11-27 |
| CN112002854B true CN112002854B (en) | 2022-11-25 |
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| CN202010676685.7A Active CN112002854B (en) | 2020-07-14 | 2020-07-14 | Explosion-proof battery |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2021310148A1 (en) * | 2020-07-14 | 2023-03-16 | Azure Mining Technology Pty Ltd | Explosion-proof battery pack |
| WO2022141032A1 (en) * | 2020-12-29 | 2022-07-07 | 烟台创为新能源科技股份有限公司 | Pressure relief explosion-proof channel for battery pack |
| CN117044018A (en) * | 2022-01-14 | 2023-11-10 | 宁德时代新能源科技股份有限公司 | Energy storage container, method and device for preparing energy storage container |
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