CN111341970B - Battery explosion-proof structure, single battery and battery module - Google Patents
Battery explosion-proof structure, single battery and battery module Download PDFInfo
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- CN111341970B CN111341970B CN202010245006.0A CN202010245006A CN111341970B CN 111341970 B CN111341970 B CN 111341970B CN 202010245006 A CN202010245006 A CN 202010245006A CN 111341970 B CN111341970 B CN 111341970B
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- 230000000903 blocking effect Effects 0.000 claims abstract description 66
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 3
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000000178 monomer Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000007306 turnover Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
- H01M50/333—Spring-loaded vent valves
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery explosion-proof structure, a single battery and a battery module, belonging to the technical field of batteries, wherein the battery explosion-proof structure comprises a closed shell and a top cover connected with the single battery, the top cover is provided with a through hole capable of communicating the inner cavity of the single battery with the inner cavity of the closed shell, and one end of the closed shell, which is far away from the through hole, is provided with a detection assembly; the blocking piece and the elastic piece are both located in the sealed shell, the blocking piece is provided with a first position and a second position, when the blocking piece is located at the first position, the blocking piece can abut against the top cover and block the through hole, when the blocking piece is pushed by gas in the inner cavity and moves from the first position to the second position, the detection assembly can send a signal to the BMS to cut off charging or discharging of the single battery, and the elastic piece is configured to be capable of removing the blocking piece and moves from the second position to the first position. The plugging piece can return to the first position, and if the single battery can work, the single battery can continue to be in service, so that the rejection rate of the single battery is reduced.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a soft package single battery, a battery module, a battery pack and a vehicle.
Background
With the development of modern society and the enhancement of environmental protection consciousness of people, more and more devices select lithium batteries as power supplies, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, and a wide space is provided for the application and development of the lithium batteries. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called power batteries.
In order to meet the use standard and meet the use requirements of people, the power battery has high capacity, good safety performance and long cycle life. The safety of the power battery is mainly embodied in how to avoid fire or explosion caused by overcharge of the lithium battery. When the power battery is overcharged or is abnormal, gas is generated inside the power battery, the internal gas pressure of the power battery is increased, the working performance of the power battery is affected, and even explosion is caused.
In order to avoid the problem, the conventional power battery top cover is often provided with a turnover piece, the turnover piece is connected with the positive electrode and the negative electrode after the air pressure in the power is increased so as to enable the power battery to be in short circuit, but the turnover piece cannot be recovered after being turned over, so that the power battery is scrapped and cannot be reused, and the scrappage of the power battery is increased.
Disclosure of Invention
The invention aims to provide a battery explosion-proof structure, a single battery and a battery module, which solve the problems that in the prior art, a turnover sheet cannot be recovered after being turned over, so that a power battery is scrapped, the power battery cannot be detected again to judge whether the power battery can be reused, and the scrappage of the power battery is increased.
As the conception, the technical scheme adopted by the invention is as follows:
a battery explosion-proof structure comprising:
the detection device comprises a closed shell, a detection component and a detection component, wherein the closed shell is connected to a top cover of a single battery, the top cover is provided with a through hole capable of communicating an inner cavity of the single battery with an inner cavity of the closed shell, and the detection component is arranged at one end, far away from the through hole, in the closed shell;
blocking piece and elastic component, the blocking piece with the elastic component all is located in the airtight shell, the blocking piece has first position and second position, works as the blocking piece is located during the first position, the blocking piece can support press in top cap and shutoff the through-hole, works as the blocking piece is in gaseous promotion in the inner chamber of cell by the first position to during the motion of second position, detecting element can send the signal to BMS in order to cut off the charging or discharging of cell, the elastic component is configured and can be driven the blocking piece by the motion of second position extremely the first position.
Further, the battery explosion-proof structure still includes the permanent magnet, the permanent magnet set up in on the shutoff piece, the detection subassembly includes the electromagnetic component, the electromagnetic component is configured to can be in the shutoff piece drives the permanent magnet to the direction motion that is close to the electromagnetic component when producing the electromagnetic wave of default frequency.
Furthermore, a groove is formed in one end, close to the electromagnetic assembly, of the plugging piece, the permanent magnet is arranged on the groove wall of the groove, one end of the elastic piece abuts against the bottom surface of the groove, and the other end of the elastic piece abuts against the electromagnetic assembly.
Further, the shutoff piece includes shutoff piece and connecting piece, connecting piece one end connect in the shutoff piece, the other end is provided with the permanent magnet, the elastic component cover is located the connecting piece, and both ends support respectively press in the shutoff piece with the electromagnetic component, work as the shutoff piece is located when the primary importance, shutoff piece level sets up, works as the shutoff piece is located when the second place, the shutoff piece orientation the electromagnetic component is bloated.
Further, the thickness of the plugging sheet is smaller than that of the battery shell of the single battery.
Further, when the blocking piece is located at the first position, the permanent magnet and the electromagnetic assembly have a preset gap, and when the blocking piece is located at the second position, the permanent magnet abuts against the electromagnetic assembly.
Further, the electromagnetic assembly includes an induction coil and a yoke, the induction coil and the yoke being connected to form a magnetic circuit.
Further, the airtight casing is including connecting casing and protection casing, connect the casing connect in the top cap, just connect the casing with form between the top cap and can have and hold the first chamber of shutoff piece, the protection casing is located connect on the casing, the protection casing has the second chamber, detection component set up in the second intracavity.
In order to achieve the purpose, the invention further provides a single battery, which comprises the battery explosion-proof structure in any scheme.
In order to achieve the above object, the present invention further provides a battery module, which comprises a BMS and the above single battery, wherein the BMS is configured to cut off the charging or discharging of the single battery when receiving a signal sent by the detection component.
The invention has the beneficial effects that:
compared with the prior art, the battery explosion-proof structure provided by the invention has the advantages that the airtight shell, the detection assembly, the blocking piece and the elastic piece are arranged, the blocking piece can move from the first position to the second position under the pushing of the gas in the inner cavity when the gas pressure in the inner cavity of the single battery exceeds the preset gas pressure, the detection assembly sends a signal to the BMS to cut off the charging or discharging of the single battery, the single battery is protected, and the continuous increase of the gas pressure is avoided. When the temperature of the gas in the inner cavity of the single battery is reduced or the gas is absorbed, and the gas pressure is lower than the preset gas pressure, the plugging piece returns to the first position from the second position under the action of the elastic piece, if the single battery can still work, namely the situation that the plugging piece is pushed again does not occur, the single battery can continue to be in service, the service life of the single battery is prolonged, and the rejection rate of the single battery is reduced.
Drawings
Fig. 1 is a first cross-sectional view (with a blocking member in a first position) of a battery explosion-proof structure according to a first embodiment of the present invention;
fig. 2 is a second cross-sectional view of the explosion-proof structure of the battery according to the first embodiment of the present invention (the blocking member is located at the second position);
fig. 3 is a sectional view of a battery explosion-proof structure according to a second embodiment of the present invention.
In the figure:
1. sealing the shell; 11. connecting the shell; 12. a protective cover; 2. a detection component; 21. an induction coil; 22. a yoke iron; 3. a blocking piece; 31. a groove; 32. a plugging sheet; 33. a connecting member; 4. an elastic member; 5. a permanent magnet; 10. a top cover; 101. and a through hole.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
Fig. 1 is a first cross-sectional view of the explosion-proof structure of the battery provided in this embodiment (the blocking member 3 is located at the first position); fig. 2 is a second cross-sectional view of the explosion-proof structure of the battery provided in this embodiment (the blocking member 3 is located at the second position). As shown in fig. 1 and 2, the present embodiment provides a battery explosion-proof structure including a hermetic case 1, a blocking member 3, and an elastic member 4. Wherein, airtight casing 1 is connected in battery cell's top cap 10, sets up the through-hole 101 that can communicate battery cell's inner chamber and airtight casing 1's inner chamber on the top cap 10, and the one end of keeping away from through-hole 101 in airtight casing 1 is provided with determine module 2. The plugging piece 3 and the elastic piece 4 are both located in the closed shell 1, the plugging piece 3 is provided with a first position and a second position, when the plugging piece 3 is located at the first position, the plugging piece 3 can be pressed against the top cover 10 and plug the through hole 101, when the plugging piece 3 moves from the first position to the second position under the pushing of gas in the inner cavity of the single BATTERY, the detection component 2 can send a signal to a BATTERY MANAGEMENT SYSTEM (BMS) to cut off the charging or discharging of the single BATTERY, and the elastic piece 4 is used for driving the plugging piece 3 to move from the second position to the first position.
Specifically, the battery explosion-proof structure further comprises a permanent magnet 5, and the permanent magnet 5 is arranged on the blocking piece 3. In this embodiment, the detecting component 2 includes the electromagnetic component, and the electromagnetic component can drive the electromagnetic wave that produces preset frequency when permanent magnet 5 removes to the direction that is close to the electromagnetic component at shutoff piece 3, and the electromagnetic wave of production can be received by BMS, and BMS cuts off the charging process or the discharge process of battery cell after receiving the electromagnetic wave, and BMS's structure and theory of operation are ripe prior art, do not describe here any more. It can be understood that, when the sealing member 3 is located at the first position, the elastic member 4 applies pressure to the sealing member 3 to enable the sealing member 3 to seal the through hole 101, and when the pressure of the gas in the inner cavity of the single battery rises and exceeds the preset gas pressure, the gas in the inner cavity of the single battery pushes the sealing member 3 to overcome the elastic force of the elastic member 4 to move from the first position to the second position, and in the process, the electromagnetic assembly is influenced by the permanent magnet 5 to generate electromagnetic waves with preset frequency.
It should be noted that, when the pressure of the gas in the inner cavity of the single battery rises to exceed the preset pressure, the process of moving the blocking member 3 from the first position to the first position is short, and the electromagnetic assembly reaches saturation in a short time, so that the electromagnetic assembly can be ensured to generate electromagnetic waves with preset frequency. In addition, above-mentioned predetermined atmospheric pressure can set up according to actual need, for example when predetermineeing atmospheric pressure relatively less, can in time cut off the charging process or the discharge process of monomer battery, protect monomer battery to also be convenient for after the monomer battery temperature reduces, the atmospheric pressure of monomer battery inner chamber reduces, makes blocking piece 3 can get back to first position under the effect of elastic component 4, is favorable to monomer battery's reuse.
Specifically, the electromagnetic assembly includes an induction coil 21 and a yoke 22, and the induction coil 21 and the yoke 22 are connected to form a magnetic circuit. Of course, in other embodiments, the sensing member 2 may further include a displacement sensor, a pressure sensor, etc. which sends a signal to the BMS by sensing the displacement of the block piece 3. And the pressure sensor sends a signal to the BMS by detecting the received pressure, it can be understood that, when the pressure sensor is selected, the blocking member 3 is pressed against the pressure sensor when the blocking member 3 is at the second position.
Further, in this embodiment, a groove 31 is formed at one end of the blocking member 3 close to the electromagnetic assembly, a permanent magnet 5 is disposed on a wall of the groove 31, one end of the elastic member 4 abuts against a bottom surface of the groove 31, and the other end abuts against the electromagnetic assembly. Further, alternatively, in the present embodiment, the permanent magnet 5 is provided on the end surface of the groove wall of the recess 31. As shown in fig. 1, when the blocking piece 3 is located at the first position, a preset gap is formed between the permanent magnet 5 and the electromagnetic assembly; as shown in fig. 2, when the blocking member 3 is located at the second position, the permanent magnet 5 abuts against the electromagnetic assembly. Wherein, predetermine the clearance and can set up according to actual need.
Further, as shown in fig. 1, the hermetic shell 1 includes a connecting shell 11 and a protective cover 12, the connecting shell 11 is connected to the top cover 10, a first cavity capable of accommodating the plugging member 3 is formed between the connecting shell 11 and the top cover 10, the protective cover 12 is covered on the connecting shell 11, the protective cover 12 has a second cavity, and the electromagnetic assembly is disposed in the second cavity. Specifically, in this embodiment, a central hole is formed in the connecting housing 11, an edge of the central hole is turned upwards to form a folded edge, the blocking member 3 abuts against the folded edge and can slide relative to the folded edge, and the protective cover 12 is hermetically connected to the connecting housing 11. In addition, in the present embodiment, the connection housing 11 is connected to the top cover 10 by welding, and the protection mask 12 is connected to the connection housing 11 by welding.
It can be understood that, through setting up first chamber, when gaseous in the inner chamber of battery cell will promote shutoff piece 3 and remove to the second position by the primary importance, gaseous in the inner chamber of battery cell can get into first intracavity to can reduce the gaseous pressure of battery cell inner chamber to a certain extent, avoid the gaseous pressure of battery cell inner chamber too high.
The operation of the explosion-proof structure of the battery will be described in detail below.
As shown in fig. 1, initially the closing member 3 is in the first position, in which the closing member 3 closes the through hole 101 in the top cover 10. When the pressure of the gas in the inner cavity of the single battery exceeds the preset air pressure, the gas in the inner cavity of the single battery pushes the plugging piece 3 to move from the first position to the second position, in the process, under the action of the permanent magnet 5, electromagnetic waves with preset frequency are generated in the electromagnetic assembly, and when the BMS receives the electromagnetic waves, the charging or discharging of the single battery is cut off, so that the single battery is protected.
After the temperature of the gas in the inner cavity of the single battery is reduced, the gas pressure in the inner cavity is lower than the preset gas pressure, the blocking piece 3 returns to the first position again from the second position under the action of the elastic piece 4, at the moment, the single battery can be charged or discharged again, if the pressure of the gas in the inner cavity of the single battery exceeds the preset gas pressure to push the blocking piece 3 to the second position, the single battery can be considered to be damaged, at the moment, the single battery can be replaced, if the single battery can still work, namely, the situation that the blocking piece 3 is pushed again does not occur, the single battery can continue to be in service, the service life of the single battery is prolonged, and the rejection rate of the single battery is reduced.
To sum up, the battery explosion-proof structure that this embodiment provided, through setting up airtight casing 1, determine module 2, shutoff piece 3 and elastic component 4, compare in prior art, when the inner chamber internal gas pressure of battery cell surpassed preset atmospheric pressure, shutoff piece 3 can be moved to the second position by first position under the gaseous promotion of inner chamber, send signal to BMS through determine module 2 and cut off the charging or discharging of battery cell, protect battery cell, avoid atmospheric pressure to continuously increase. When the temperature of the gas in the inner cavity of the single battery is reduced or the gas is absorbed, and the gas pressure is lower than the preset gas pressure, the blocking piece 3 returns to the first position again from the second position under the action of the elastic piece 4, if the single battery can still work, namely the situation that the blocking piece 3 is pushed again does not occur, the single battery can continue to be in service, the service life of the single battery is prolonged, and the rejection rate of the single battery is reduced.
In addition, through the battery explosion-proof structure that this embodiment provided, can avoid the outside electrolyte that exhausts of battery cell and take out to other battery cells or the circuit of being connected with battery cell production influence to improve battery module's security performance.
The embodiment also provides a single battery, which comprises the battery explosion-proof structure.
The embodiment also provides a battery module, and the battery module includes BMS and a plurality of above-mentioned battery cell, and accessible BMS is to every battery cell control.
Example two
The battery explosion-proof structure provided by the present embodiment is basically the same as the battery explosion-proof structure in the first embodiment, except that: as shown in fig. 3, the blocking piece of the battery explosion-proof structure provided by this embodiment includes a blocking piece 32 and a connecting piece 33, one end of the connecting piece 33 is connected to the blocking piece 32, the other end is provided with a permanent magnet 5, the connecting piece 33 is sleeved with an elastic piece 4, and two ends of the connecting piece respectively abut against the blocking piece 32 and the electromagnetic assembly, when the blocking piece 32 is located at the first position, the blocking piece 32 is horizontally arranged, and when the blocking piece 32 is located at the second position, the blocking piece 32 bulges towards the electromagnetic assembly. It can be understood that, when the pressure of the gas in the inner cavity of the single battery rises and exceeds the preset gas pressure, the gas in the inner cavity of the single battery pushes the plugging sheet 32 to bulge toward the direction of the electromagnetic assembly, that is, the gas is subjected to bending elastic deformation, so that the permanent magnet 5 is driven to move toward the direction close to the electromagnetic assembly by pushing the connecting member 33. Specifically, in this embodiment, the plugging piece 32 is formed by opening the groove 31 on the plugging member 3 in the first embodiment, but in other embodiments, the plugging piece 32 may also be separately disposed on the top cover 10.
It should be noted that, the thickness of the blocking piece 32 is smaller than the thickness of the battery shell of the single battery, so the strength of the blocking piece 32 is smaller than the strength of the battery shell, and when the air pressure in the battery shell rises to exceed the preset air pressure, the blocking piece 32 can be pushed by the air in the battery shell to bulge toward the electromagnetic assembly, thereby ensuring that the explosion-proof structure of the battery can achieve an explosion-proof effect.
The rest of the structure of the battery explosion-proof structure provided in this embodiment is the same as that of the battery explosion-proof structure in the first embodiment, and is not described herein again.
The embodiment also provides a single battery, which comprises the battery explosion-proof structure.
The embodiment also provides a battery module, and the battery module includes BMS and a plurality of above-mentioned battery cell, and accessible BMS is to every battery cell control.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A battery explosion-proof structure, comprising:
the device comprises a closed shell (1) connected to a top cover (10) of a single battery, wherein a through hole (101) capable of communicating an inner cavity of the single battery with an inner cavity of the closed shell (1) is formed in the top cover (10), and a detection assembly (2) is arranged at one end, far away from the through hole (101), in the closed shell (1);
a blocking piece (3) and an elastic piece (4), wherein the blocking piece (3) and the elastic piece (4) are both positioned in the closed shell (1), the blocking piece (3) is provided with a first position and a second position, when the blocking piece (3) is positioned at the first position, the blocking piece (3) can be pressed against the top cover (10) and block the through hole (101), when the blocking piece (3) moves from the first position to the second position under the pushing of gas in the inner cavity of the single battery, the detection component (2) can send a signal to the BMS to cut off the charging or discharging of the single battery, and the elastic piece (4) is configured to drive the blocking piece (3) to move from the second position to the first position;
still include permanent magnet (5), permanent magnet (5) set up in on shutoff piece (3), detection components (2) include electromagnetic assembly, electromagnetic assembly is configured to can shutoff piece (3) drive permanent magnet (5) are to being close to the electromagnetic wave of frequency is predetermine in the direction motion of electromagnetic assembly the production.
2. The battery explosion-proof structure according to claim 1, characterized in that a groove (31) is formed at one end of the blocking piece (3) close to the electromagnetic assembly, the permanent magnet (5) is arranged on the groove wall of the groove (31), one end of the elastic piece (4) is pressed against the bottom surface of the groove (31), and the other end is pressed against the electromagnetic assembly.
3. The battery explosion-proof structure according to claim 1, characterized in that the blocking piece (3) comprises a blocking piece (32) and a connecting piece (33), one end of the connecting piece (33) is connected to the blocking piece (32), the other end is provided with the permanent magnet (5), the elastic piece (4) is sleeved on the connecting piece (33), and the two ends are respectively abutted against the blocking piece (32) and the electromagnetic assembly, when the blocking piece (32) is located at the first position, the blocking piece (32) is horizontally arranged, and when the blocking piece (32) is located at the second position, the blocking piece (32) bulges towards the electromagnetic assembly.
4. The battery explosion-proof structure according to claim 3, wherein the thickness of the blocking sheet (32) is smaller than that of a battery case of the unit battery.
5. The battery explosion-proof structure according to any one of claims 1 to 4, wherein the permanent magnet (5) has a predetermined clearance from the electromagnetic assembly when the closure (3) is in the first position, and the permanent magnet (5) abuts against the electromagnetic assembly when the closure (3) is in the second position.
6. The battery explosion-proof structure according to claim 1, wherein the electromagnetic assembly includes an induction coil (21) and a yoke (22), and the induction coil (21) and the yoke (22) are connected to form a magnetic circuit.
7. The battery explosion-proof structure according to claim 1, characterized in that the hermetic shell (1) comprises a connecting shell (11) and a protective cover (12), the connecting shell (11) is connected to the top cover (10), a first cavity capable of accommodating the blocking piece (3) is formed between the connecting shell (11) and the top cover (10), the protective cover (12) is covered on the connecting shell (11), the protective cover (12) is provided with a second cavity, and the detection assembly (2) is arranged in the second cavity.
8. A unit cell, characterized by comprising the battery explosion-proof structure according to any one of claims 1 to 7.
9. A battery module, characterized by comprising a BMS and the single battery according to claim 8, the BMS being configured to be able to cut off the charging or discharging of the single battery upon receiving a signal sent by the detection assembly (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245006.0A CN111341970B (en) | 2020-03-31 | 2020-03-31 | Battery explosion-proof structure, single battery and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245006.0A CN111341970B (en) | 2020-03-31 | 2020-03-31 | Battery explosion-proof structure, single battery and battery module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111341970A CN111341970A (en) | 2020-06-26 |
| CN111341970B true CN111341970B (en) | 2023-03-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637259B (en) * | 2020-07-03 | 2023-04-07 | 东莞蒲微防水透气膜材料有限公司 | Explosion-proof valve |
| JP2023551710A (en) * | 2021-07-21 | 2023-12-12 | エルジー エナジー ソリューション リミテッド | Vent device and battery pack assembly including the same, and automobile including the battery pack assembly |
| CN117178427A (en) * | 2022-01-25 | 2023-12-05 | 宁德时代新能源科技股份有限公司 | Battery monomer, battery, electric equipment and manufacturing method and equipment of battery monomer |
| CN115020880A (en) * | 2022-06-23 | 2022-09-06 | 江苏正力新能电池技术有限公司 | Battery top cap and battery |
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| JPH09106803A (en) * | 1995-10-09 | 1997-04-22 | Wako Denshi Kk | Safety apparatus for battery |
| WO2017143748A1 (en) * | 2016-02-25 | 2017-08-31 | 比亚迪股份有限公司 | Power battery, protection system thereof, and electric vehicle |
| CN108428827A (en) * | 2018-03-08 | 2018-08-21 | 中航锂电（洛阳）有限公司 | A kind of battery cover board and battery, vehicle using the battery cover board |
| CN108461837A (en) * | 2018-02-28 | 2018-08-28 | 北京国能电池科技股份有限公司 | Anti-explosion battery manages system and power battery power-supply system |
| CN208460850U (en) * | 2018-07-16 | 2019-02-01 | 东莞纳普能源科技有限公司 | A kind of battery open circuit explosion-proof valve and its anti-explosion battery |
| CN109904366A (en) * | 2019-03-08 | 2019-06-18 | 合肥聚驰科技有限公司 | It is a kind of to provide the method and battery system of thermal runaway signal by explosion-proof relief valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202042536U (en) * | 2010-04-23 | 2011-11-16 | 比亚迪股份有限公司 | Explosion-proof battery structure and power battery adopting same |
| WO2014178650A1 (en) * | 2013-04-30 | 2014-11-06 | 한국철도기술연구원 | Energy harvester and wireless sensor device including same |
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2020
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09106803A (en) * | 1995-10-09 | 1997-04-22 | Wako Denshi Kk | Safety apparatus for battery |
| WO2017143748A1 (en) * | 2016-02-25 | 2017-08-31 | 比亚迪股份有限公司 | Power battery, protection system thereof, and electric vehicle |
| CN108461837A (en) * | 2018-02-28 | 2018-08-28 | 北京国能电池科技股份有限公司 | Anti-explosion battery manages system and power battery power-supply system |
| CN108428827A (en) * | 2018-03-08 | 2018-08-21 | 中航锂电（洛阳）有限公司 | A kind of battery cover board and battery, vehicle using the battery cover board |
| CN208460850U (en) * | 2018-07-16 | 2019-02-01 | 东莞纳普能源科技有限公司 | A kind of battery open circuit explosion-proof valve and its anti-explosion battery |
| CN109904366A (en) * | 2019-03-08 | 2019-06-18 | 合肥聚驰科技有限公司 | It is a kind of to provide the method and battery system of thermal runaway signal by explosion-proof relief valve |
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| CN111341970A (en) | 2020-06-26 |
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