CN106784567B - Power supply and power supply system for preventing battery thermal runaway - Google Patents
Power supply and power supply system for preventing battery thermal runaway Download PDFInfo
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- CN106784567B CN106784567B CN201710033075.3A CN201710033075A CN106784567B CN 106784567 B CN106784567 B CN 106784567B CN 201710033075 A CN201710033075 A CN 201710033075A CN 106784567 B CN106784567 B CN 106784567B
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Classifications
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- 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
-
- 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
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/103—Fuse
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a power supply and a power supply system for preventing battery thermal runaway. The power supply includes a plurality of battery cells and a current collector assembly. The current collecting plate assembly comprises a positive current collecting plate and a negative current collecting plate, wherein a plurality of battery monomers are arranged between the negative current collecting plate and the positive current collecting plate in parallel, and insulating pieces are respectively arranged on the positive current collecting plate and the negative current collecting plate. The negative current collecting plate is electrically connected with the cathodes of the battery monomers through a negative electrode connecting plate. The positive current collecting plate is electrically connected with the positive electrodes of the battery monomers through a plurality of positive electrode connecting pieces. Therefore, even when a certain battery monomer is thermally unstable, the thermally unstable battery monomer cannot be conducted with peripheral battery monomers and positive and negative current collecting plates, so that secondary short circuit is avoided, and the propagation of thermal runaway is fundamentally inhibited.
Description
Technical Field
The invention relates to the field of lithium ion battery protection, in particular to a power supply and a power supply system for preventing battery thermal runaway.
Background
Automobile use is becoming more popular, and global environmental pollution and oil shortage problems are also becoming more prominent. The lithium battery has the advantages of small environmental pollution, no noise, high energy and the like, is widely applied to the electric automobile, and particularly applied to the electric automobile in recent years.
Under the use of charging and discharging, the electrochemical reaction inside the battery can generate heat, and when the battery monomer is extruded by external force, punctured and internal short circuit occurs, the internal heating of the lithium battery can be increased, high-temperature gas is generated, and accidents such as explosion and ignition are easy to occur. If proper measures are not taken, when one of the battery cells is thermally unstable, other adjacent battery cells are affected, so that thermal runaway is propagated, and larger accidents are caused.
The battery pack used in daily life consists of a plurality of rows and a plurality of columns of battery cells, and a short-circuit protection device is not arranged on the battery cells generally, so that the safety and the reliability are poor. When the electrolyte and the high-temperature gas in a certain battery cell are exploded and sprayed, the battery cell is conducted with the positive and negative electrode current collecting plates due to the deformation of the battery cell, so that the whole battery pack is in short circuit, and the continuous short circuit can lead the temperature of the thermally unstable battery cell and the temperature of the surrounding battery cells to rise sharply, thereby causing thermal runaway to spread.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a power supply and a power supply system for preventing thermal runaway of a battery, which can prevent the thermal unstably connected battery cells from conducting with peripheral battery cells and positive and negative current collecting plates through short-circuit protection when a certain battery cell is thermally unstably connected, thereby avoiding secondary short-circuit and fundamentally inhibiting the propagation of the thermal runaway.
The preferred embodiment of the present invention provides a power supply for preventing thermal runaway of a battery, the power supply comprising a plurality of battery cells and a current collecting plate assembly, wherein:
the current collecting plate assembly comprises a positive current collecting plate and a negative current collecting plate, the plurality of battery monomers are arranged between the negative current collecting plate and the positive current collecting plate in parallel, and insulating pieces are respectively arranged on the positive current collecting plate and the negative current collecting plate;
the negative current collecting plate is electrically connected with the cathodes of the battery monomers through a negative electrode connecting plate;
the positive current collecting plate is electrically connected with the positive electrodes of the battery monomers through a plurality of positive electrode connecting pieces.
In a preferred embodiment of the present invention, the insulating member includes insulating layers respectively disposed on the positive current collecting plate and the negative current collecting plate, wherein:
the insulating layer of the positive current collecting plate is arranged on the surface of one side, close to the battery cell, of the positive current collecting plate;
the insulating layer of the negative current collecting plate is arranged on the surface of one side of the negative current collecting plate far away from the battery cell or the insulating layers are arranged on the surfaces of two sides of the negative current collecting plate.
In a preferred embodiment of the present invention, the insulating member further includes an insulating fixing member for reinforcing the insulating layer and the positive current collecting plate, and the insulating layer and the negative current collecting plate, respectively, wherein:
a plurality of first convex holes for exposing the positive electrodes of the battery cells are formed in the insulating fixing piece for reinforcing the positive current collecting plate and the insulating layer, and the number of the first convex holes is the same as that of the battery cells;
the insulating fixing piece used for reinforcing the negative current collecting plate and the insulating layer is provided with a plurality of second convex holes used for exposing the negative electrodes of the battery cells, and the number of the second convex holes is the same as that of the battery cells.
In a preferred embodiment of the present invention, the positive current collecting plate is provided with a plurality of first through holes for exposing the positive electrodes of the plurality of battery cells, and the number and positions of the first through holes are matched with those of the first protruding holes.
In a preferred embodiment of the present invention, the negative current collecting plate is provided with a plurality of second through holes for exposing the negative electrodes of the plurality of battery cells, and the number and positions of the second through holes are matched with those of the second protruding holes.
In a preferred embodiment of the present invention, the negative electrode connection plate includes a plurality of negative electrode connection members, and the number and positions of the plurality of negative electrode connection members are matched with the number and positions of the plurality of second through holes formed in the negative current collecting plate.
In a preferred embodiment of the present invention, the negative electrode connecting member includes a negative electrode body, a negative electrode tab, and a fuse element for connecting the negative electrode body and the negative electrode tab, wherein the negative electrode tab is electrically connected with a negative electrode of the battery cell, and the negative electrode body is fixedly connected with the negative current collecting plate.
In a preferred embodiment of the present invention, the negative electrode connection member has a planar spiral structure.
In a preferred embodiment of the present invention, the positive electrode connecting member is in a sheet structure, and the positive electrode connecting member includes a positive electrode body, a positive electrode tab, and a fuse piece for connecting the positive electrode body and the positive electrode tab, where the positive electrode tab is electrically connected to the positive electrode of the battery cell, and the positive electrode body is fixedly connected to the positive current collecting plate.
The preferred embodiment of the present invention also provides a power supply system including the battery thermal runaway prevention power supply of any one of the above.
Compared with the prior art, the power supply and the power supply system for preventing the battery from thermal runaway have the following beneficial effects:
the power supply includes a plurality of battery cells and a current collector assembly. The current collecting plate assembly comprises a positive current collecting plate and a negative current collecting plate, wherein a plurality of battery monomers are arranged between the negative current collecting plate and the positive current collecting plate in parallel, and insulating pieces are respectively arranged on the positive current collecting plate and the negative current collecting plate. The negative current collecting plate is electrically connected with the cathodes of the battery monomers through a negative electrode connecting plate. The positive current collecting plate is electrically connected with the positive electrodes of the battery monomers through a plurality of positive electrode connecting pieces. Therefore, even when a certain battery monomer is thermally unstable, the thermally unstable battery monomer cannot be conducted with peripheral battery monomers and positive and negative current collecting plates, so that secondary short circuit is avoided, and the propagation of thermal runaway is fundamentally inhibited.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a power supply for preventing thermal runaway of a battery according to a preferred embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the single battery cell shown in fig. 1 according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the negative electrode connection plate shown in fig. 1 according to a preferred embodiment of the present invention.
Fig. 4 is a schematic structural view of the negative electrode connection member shown in fig. 3 according to a preferred embodiment of the present invention.
Fig. 5 is a schematic structural diagram of the positive electrode connecting member shown in fig. 1 according to a preferred embodiment of the present invention.
Icon: 100-battery cells; 110-positive electrode; 120-negative electrode; 200-a current collecting plate assembly; 210-positive current collector plate; 212-a first via; 220-a negative current collector plate; 222-a second through hole; 300-insulating member; 310-an insulating layer; 320-insulating fixtures; 321-a first convex hole; 323-second protruding holes; 400-negative electrode connecting plates; 410-a negative electrode connection; 412-a negative electrode body; 414-negative electrode ear; 416-fuse; 500-positive electrode connection; 510-a positive electrode body; 512-positive electrode lug; 514-fuse link.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the power source or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power supply for preventing thermal runaway of a battery according to a preferred embodiment of the invention. The power supply for preventing thermal runaway of a battery includes a plurality of battery cells 100, a current collecting plate assembly 200, an insulator 300, a negative electrode connection plate 400, and a positive electrode connection member 500.
In this embodiment, the current collecting plate assembly 200 includes a positive current collecting plate 210 and a negative current collecting plate 220, the plurality of battery cells 100 are disposed in parallel between the negative current collecting plate 220 and the positive current collecting plate 210, and the positive current collecting plate 210 and the negative current collecting plate 220 are respectively provided with an insulating member 300. The negative current collecting plate 220 is electrically connected with the plurality of battery cells 100 through a negative electrode connection plate 400. The positive current collecting plate 210 is electrically connected to the plurality of battery cells 100 through a plurality of positive electrode connectors 500.
Referring to fig. 1 and 2, fig. 2 is a schematic structural diagram of a single battery cell 100 shown in fig. 1 according to a preferred embodiment of the present invention. In the present embodiment, the battery cell 100 includes a positive electrode 110 and a negative electrode 120. Specifically, the negative current collecting plate 220 is electrically connected to the negative electrodes 120 of the plurality of battery cells 100 through a negative electrode connection plate 400. The positive current collecting plate 210 is electrically connected to the positive electrodes 110 of the plurality of battery cells 100 through a plurality of positive electrode connectors 500.
Referring to fig. 2 again, in the present embodiment, the insulating member 300 includes an insulating layer 310, the insulating layer 310 is disposed on the positive current collecting plate 210 and the negative current collecting plate 220, respectively, wherein:
the insulating layer 310 of the positive current collector plate 210 may be disposed on a surface of the positive current collector plate 210 adjacent to one side of the battery cell 100.
The insulating layer 310 of the negative current collecting plate 220 may be disposed on a surface of the negative current collecting plate 220 on a side away from the battery cell 100 or the insulating layer 310 may be disposed on both surfaces of the negative current collecting plate 220. The insulating layer 310 is preferably disposed on both side surfaces of the negative current collecting plate 220.
In this embodiment, the insulating layer 310 may be disposed by, but not limited to, applying an insulating material to a corresponding position of the current collecting plate assembly 200 where the insulating layer 310 is disposed, and adhering the insulating layer 310 to a corresponding position of the current collecting plate assembly 200 where the insulating layer 310 is disposed by using an adhesive member.
The insulating materials are of various kinds and can be classified into three kinds of gas, liquid and solid. Common gas insulating materials include air, nitrogen, sulfur hexafluoride, and the like. The liquid insulating material mainly comprises mineral insulating oil and synthetic insulating oil (silicone oil, dodecylbenzene, polyisobutylene, isopropyl biphenyl, diarylethane, etc.). Solid insulating materials can be classified into organic and inorganic materials. In the present embodiment, the insulating material for manufacturing the insulating layer 310 is preferably an inorganic solid insulating material, which may be, but is not limited to, an inorganic solid insulating material made of mica, glass, ceramic, and a mixture thereof, an inorganic solid insulating material made of silicon, boron, and various metal oxides. The inorganic solid insulating material mainly takes an ionic structure as a main material, has high heat resistance and good stability, and has better atmospheric aging resistance, chemical resistance and long-term corrosion resistance under the action of an electric field.
In this embodiment, the insulating member 300 further includes an insulating fixing member 320 for reinforcing the insulating layer 310 and the positive current collecting plate 210, and the insulating layer 310 and the negative current collecting plate 220, respectively, wherein:
the insulating fixing member 320 for reinforcing the positive current collecting plate 210 and the insulating layer 310 is provided with a plurality of first protruding holes 321 for exposing the positive electrodes 110 of the battery cells 100, and the number of the first protruding holes 321 is the same as the number of the battery cells 100.
The insulating fixing member 320 for reinforcing the negative current collecting plate 220 and the insulating layer 310 is provided with a plurality of second protruding holes 323 for exposing the negative electrodes 120 of the battery cells 100, and the number of the second protruding holes 323 is the same as the number of the battery cells 100.
In this embodiment, the insulating holder 320 is preferably made of ABS plastic (Acrylonitrile Butadiene Styrene plastic), which is a terpolymer of acrylonitrile, butadiene and styrene, and has a chemical name of acrylonitrile-butadiene-styrene copolymer (Acrylonitrile Butadiene Styrene copolymer, ABS). ABS is typically a pale yellow or milky pellet amorphous resin, one of the most widely used engineering plastics. ABS resin is one of five synthetic resins, has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical property, has the characteristics of easy processing, stable product size, good surface glossiness and the like, is easy to coat and color, can be used for secondary processing such as surface spraying metal, electroplating, welding, hot pressing, bonding and the like, and is widely applied to industrial fields such as machinery, automobiles, electronic appliances, instruments and meters, textile, building and the like, and extremely wide application range of thermoplastic engineering plastics.
In the present embodiment, the insulation layer 310 and the insulation fixing member 320 are disposed on the surface of the current collecting plate assembly 200, thereby achieving double protection of the battery cell 100 and the current collecting plate assembly 200 and enhancing insulation and impact resistance. Even if the thermal instability is caused by the internal short circuit of the battery cell 100, the thermal instability battery cell 100 will not be conducted with the peripheral battery cell 100 and the current collecting plate assembly 200, and the occurrence of secondary short circuit and thermal runaway diffusion is avoided.
Referring to fig. 1 and 2 again, in the present embodiment, a plurality of first through holes 212 for exposing the positive electrodes 110 of the plurality of battery cells 100 are formed on the positive current collecting plate 210, and the number and positions of the first through holes 212 are matched with those of the first protruding holes 321.
The negative current collecting plate 220 is provided with a plurality of second through holes 222 for exposing the negative electrodes 120 of the plurality of battery cells 100, and the number and positions of the second through holes 222 are matched with those of the second protruding holes 323.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the negative electrode connection plate 400 shown in fig. 1 according to a preferred embodiment of the invention. In this embodiment, the negative electrode connection plate 400 includes a plurality of negative electrode connection members 410 and a plurality of ventilation holes for ventilation. The number and positions of the negative electrode connectors 410 are matched with the number and positions of the second through holes 222 formed in the negative current collecting plate 220.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the negative electrode connecting member 410 shown in fig. 3 according to a preferred embodiment of the present invention. In this embodiment, the negative electrode connector 410 includes a negative electrode body 412, a negative electrode tab 414, and a fuse 416 for connecting the negative electrode body 412 and the negative electrode tab 414. The negative electrode tab 414 is electrically connected to the negative electrode 120 of the battery cell 100, and the negative electrode body 412 is fixedly connected to the negative current collecting plate 220.
In the present embodiment, the material of which the fuse 416 is made may be, but is not limited to, a material having a fusible property such as an aluminum material, a nickel plating material, or the like. The negative electrode body 412 and the negative current collecting plate 220 may be preferably fixedly connected by welding.
In this embodiment, the negative electrode connection member 410 preferably adopts a planar spiral structure.
Referring to fig. 5, fig. 5 is a schematic structural diagram of the positive electrode connection member 500 shown in fig. 1 according to a preferred embodiment of the invention. In this embodiment, the positive electrode connecting member 500 has a sheet structure, and the positive electrode connecting member 500 includes a positive electrode body 510, a positive electrode tab 512, and a fuse piece 514 for connecting the positive electrode body 510 and the positive electrode tab 512. The positive electrode tab 512 is electrically connected to the positive electrode 110 of the battery cell 100, and the positive electrode body 510 is fixedly connected to the positive current collecting plate 210.
In this embodiment, the fuse link 514 is preferably made of aluminum foil. The positive electrode body 510 and the positive current collecting plate 210 may be preferably fixedly connected by welding.
In this embodiment, the fuse 416 provided on the negative electrode connector 410 and the fuse 514 provided on the positive electrode connector 500 correspond to fuse functions. When the current exceeds the designed maximum current carrying or the temperature of the battery cell 100 is too high and exceeds the set temperature, the fuse element 416 and the fuse element 514 can be instantaneously fused, so that the lithium battery is protected and dangerous situations such as ignition, explosion and the like are avoided. The fuse element 416 and the fuse piece 514 can play a role of flexible connection, so that the device is safer and more reliable; on the other hand, the design can be combined with the conversion relation between rated current and the cross section of the material, and the fuse can be timely fused to play a role in protection.
The embodiment of the invention also provides a power supply system which comprises the power supply for preventing the battery from thermal runaway.
In summary, the present invention provides a power supply and a power supply system for preventing thermal runaway of a battery. The power supply includes a plurality of battery cells and a current collector assembly. The current collecting plate assembly comprises a positive current collecting plate and a negative current collecting plate, wherein a plurality of battery monomers are arranged between the negative current collecting plate and the positive current collecting plate in parallel, and insulating pieces are respectively arranged on the positive current collecting plate and the negative current collecting plate. The negative current collecting plate is electrically connected with the cathodes of the battery monomers through a negative electrode connecting plate. The positive current collecting plate is electrically connected with the positive electrodes of the battery monomers through a plurality of positive electrode connecting pieces. Therefore, through the double insulation protection of the insulation layer and the insulation fixing piece, and the fusing protection of the fusing piece and the fusing piece, when the internal short circuit, the overlarge current, the overhigh temperature and other thermal instability conditions occur in the battery monomer, the thermally unstable battery monomer can not be conducted with the peripheral battery monomer and the positive and negative electrode current collecting plates, so that the occurrence of secondary short circuit is avoided, the propagation of thermal runaway is fundamentally restrained, the influence on the performance of the lithium battery is avoided, and the occurrence of dangerous conditions such as high temperature or combustion is prevented.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A power supply for preventing thermal runaway of a battery, the power supply comprising a plurality of cells and a current collector plate assembly, characterized by:
the current collecting plate assembly comprises a positive current collecting plate and a negative current collecting plate, the plurality of battery monomers are arranged between the negative current collecting plate and the positive current collecting plate in parallel, and insulating pieces are respectively arranged on the positive current collecting plate and the negative current collecting plate;
the negative current collecting plate is electrically connected with the cathodes of the battery monomers through a negative electrode connecting plate;
the positive current collecting plate is electrically connected with the positive electrodes of the battery monomers through a plurality of positive electrode connecting pieces;
the insulating piece includes the insulating layer, the insulating layer set up respectively in on positive current collector and the negative current collector, wherein:
the insulating layer of the positive current collecting plate is arranged on the surface of one side, close to the battery cell, of the positive current collecting plate;
the insulating layer of the negative current collecting plate is arranged on the surface of the negative current collecting plate, which is far away from one side of the battery cell, or the insulating layers are arranged on the surfaces of the two sides of the negative current collecting plate;
the insulating member further includes an insulating fixing member for reinforcing the insulating layer and the positive current collecting plate, and the insulating layer and the negative current collecting plate, respectively, wherein:
a plurality of first convex holes for exposing the positive electrodes of the battery cells are formed in the insulating fixing piece for reinforcing the positive current collecting plate and the insulating layer, and the number of the first convex holes is the same as that of the battery cells;
a plurality of second convex holes for exposing the cathodes of the battery cells are formed in the insulating fixing piece for reinforcing the negative current collecting plate and the insulating layer, and the number of the second convex holes is the same as that of the battery cells;
the positive current collecting plate is provided with a plurality of first through holes for exposing positive electrodes of the plurality of battery cells, and the number and the positions of the first through holes are matched with those of the first convex holes; the negative current collecting plate is provided with a plurality of second through holes for exposing the cathodes of the battery cells, and the number and the positions of the second through holes are matched with those of the second convex holes;
the negative electrode connecting plate comprises a plurality of negative electrode connecting pieces, and the number and the positions of the plurality of negative electrode connecting pieces are matched with those of the plurality of second through holes formed in the negative current collecting plate;
the negative electrode connecting piece comprises a negative electrode body, a negative electrode lug and a fusing piece for connecting the negative electrode body and the negative electrode lug, wherein the negative electrode lug is electrically connected with a negative electrode of the battery cell, and the negative electrode body is fixedly connected with the negative current collecting plate.
2. The power supply of claim 1, wherein the negative electrode connection member is a planar spiral structure.
3. The power supply according to claim 1, wherein the positive electrode connecting member has a sheet structure, the positive electrode connecting member includes a positive electrode body, a positive electrode tab, and a fuse piece for connecting the positive electrode body and the positive electrode tab, the positive electrode tab is electrically connected with the positive electrode of the battery cell, and the positive electrode body is fixedly connected with the positive current collecting plate.
4. A power supply system characterized in that it comprises the battery thermal runaway prevention power supply according to any one of claims 1 to 3.
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| CN201710033075.3A CN106784567B (en) | 2017-01-18 | 2017-01-18 | Power supply and power supply system for preventing battery thermal runaway |
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| CN106784567B true CN106784567B (en) | 2024-03-12 |
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| CN106784492A (en) * | 2017-01-23 | 2017-05-31 | 华霆（合肥）动力技术有限公司 | A kind of laminated type safeguard structure and battery modules |
| CN110203072A (en) * | 2019-06-18 | 2019-09-06 | 华霆（合肥）动力技术有限公司 | Thermal runaway protective device, power supply device and thermal runaway means of defence |
| CN111952525B (en) * | 2020-08-20 | 2023-06-20 | 华霆（合肥）动力技术有限公司 | Same-side current collecting device, battery module and electric vehicle |
| CN114335802A (en) * | 2021-12-30 | 2022-04-12 | 重庆跃达电力设备有限公司 | Intelligent energy storage battery pack for 5G communication |
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| CN106784567A (en) | 2017-05-31 |
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