CN116995330A - Battery device with thermal protection mechanism - Google Patents
Battery device with thermal protection mechanism Download PDFInfo
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- CN116995330A CN116995330A CN202210450495.2A CN202210450495A CN116995330A CN 116995330 A CN116995330 A CN 116995330A CN 202210450495 A CN202210450495 A CN 202210450495A CN 116995330 A CN116995330 A CN 116995330A
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- battery
- frame
- battery cells
- protection mechanism
- thermal protection
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- 230000007246 mechanism Effects 0.000 title claims abstract description 38
- 230000017525 heat dissipation Effects 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000007864 aqueous solution Substances 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000010408 film Substances 0.000 description 53
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- 238000012546 transfer Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 239000002390 adhesive tape Substances 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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Classifications
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery device with a heat protection mechanism, which comprises a plurality of battery cells and at least one heat dissipation container. The heat dissipation container comprises a frame and two films. The frame comprises at least one perforation part. The film is connected with the frame and covers the perforated part on the frame, so that the perforated part becomes a closed space. The liquid is disposed in the enclosed space, wherein the liquid may be water or an aqueous solution. The bottom of the battery core is adjacent to the film of the heat dissipation container, and when the temperature of the battery core is too high, the film of the heat dissipation container is damaged. The liquid may be sprayed out of the heat sink and contact the battery cells to reduce the temperature of the battery cells. The battery equipment can reduce the setting cost of the battery device and simultaneously achieve the aim of preventing the battery device from thermal runaway.
Description
Technical Field
The invention relates to a battery device with a thermal protection mechanism, which can quickly reduce the temperature of a battery core in thermal runaway and can effectively avoid the thermal runaway of other battery cores caused by the battery core in thermal runaway.
Background
The rechargeable battery (Rechargeable battery) is widely referred to as a battery that can be recharged and reused, and mainly includes a nickel-hydrogen battery, a nickel-cadmium battery, a lithium ion battery, etc., and is widely used in electronic products, home electric appliances, and vehicles.
In addition, with the development of industry and the rising of environmental awareness, the problems of air pollution and global warming are increasingly emphasized. At present, the countries in the world gradually prescribe related regulations to popularize and develop the industry of electric vehicles, and research and design that the vending of fuel vehicles is forbidden after a certain time so as to reduce the air pollution caused by vehicles to all areas.
The rechargeable battery is one of the key technologies for developing the electric vehicle industry, and how to increase the charge amount of the rechargeable battery, shorten the charging time of the rechargeable battery, and improve the safety of the rechargeable battery is the key point for popularizing and developing the electric vehicle industry. The lithium ion battery has the advantages of high energy density, high output power, no memory effect, low self-discharge, wide working temperature range, high charge and discharge speed and the like, and is a rechargeable battery mainly used for electric vehicles.
Typically, a plurality of cells (cells) are connected to form a battery pack, and the series connection and/or parallel connection of the cells are adjusted so that the battery pack can output the voltage and current required by the product. However, when one of the battery cells in the battery pack fails to cause a short circuit, other normal battery cells charge the short-circuited battery cells with a large current, which in turn causes an abnormal rise in the temperature of the short-circuited battery cells. When the temperature exceeds the temperature which can be born by the isolating layer inside the battery core, the isolating layer is dissolved, so that the anode material and the cathode material of the battery core are short-circuited, and the situation of burning or explosion of the battery core is caused.
The high temperature or the sprayed electrolyte generated by the failed battery cells is transferred to other battery cells or conductive sheets, so that the temperature of the conductive sheets and the connected battery cells is abnormally increased, and other normal battery cells can be damaged, so that the battery pack is in thermal runaway.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a battery device with a thermal protection mechanism, which mainly comprises a plurality of battery cells and at least one heat dissipation container. The heat dissipation container comprises a frame and at least one film, wherein the frame comprises a perforation part or a concave part. The film is connected with the frame and covers the perforation part or the concave part so as to form a closed accommodating space between the frame and the film.
When the temperature of the battery cell is too high or thermal runaway occurs, for example, the temperature of the battery cell exceeds 160 to 200 degrees celsius, the bottom or positive electrode of the battery cell faces the film of the heat dissipation container, which may cause the film of the heat dissipation container to be broken. The liquid is arranged in the accommodating space, for example, the liquid can be water or aqueous solution, wherein the liquid can flow out through the broken film and is sprayed on the battery core with overhigh temperature or thermal runaway so as to reduce the temperature of the battery core and prevent other normal battery cores from generating thermal runaway chain reactions.
The main component of the liquid in the closed space of the heat dissipation container is water, and the water has quite high thermal stability and specific heat, so that the water or aqueous solution sprayed out of the heat dissipation container can effectively reduce the temperature of the battery core in thermal runaway. The heat of vaporization of the water was 40.8 kj/mol, corresponding to 2266 kj/kg, which was about 5.4 times the energy required to heat the water from 0 to 100 ℃. Therefore, when the water is heated to be boiling point by the battery cell in thermal runaway and evaporated from liquid state to gas state, the water can absorb a great amount of heat generated by the battery cell in thermal runaway, and the temperature of the battery cell in thermal runaway is greatly reduced.
In addition, when the film of the heat dissipating container is broken, some water is sprayed out of the container, and some water remains in the heat dissipating container. The liquid or vaporized water sprayed out of the heat sink can directly and rapidly reduce the temperature of the thermal runaway battery cells, while the water left in the heat sink can continuously absorb the temperature of the thermal runaway battery cells. When the water temperature remained in the heat-dissipating container is greater than the boiling point, the water is gasified, and a great amount of heat is absorbed by the thermal runaway battery cell, so that the temperature of the thermal runaway battery cell is continuously reduced until the water remained in the heat-dissipating container is consumed.
An objective of the present invention is to provide a battery device with a thermal protection mechanism, which does not need to additionally provide a detector and a complicated control circuit to measure the temperature of the battery cell and determine whether the battery cell is out of control. In particular, the present invention may be used to place the membrane on the frame through an adhesive or welding, such as brazing or soldering, to form a closed space between the membrane and the frame, and to place water within the closed space. Therefore, the invention can provide a battery device with a heat protection mechanism, which is low in cost, safe and stable, and can achieve the purpose of preventing the thermal runaway of the battery device while reducing the setting cost of the battery device.
In addition, the plurality of conductive layers may connect a plurality of battery cells in series or in parallel to form a battery module. During use, for example, charging and discharging, the temperature at both sides of the battery module will be different, wherein one side is a hot side (hot side) and the other side is a cold side (cool side). The battery modules at the high temperature side and the low temperature side transfer heat to the heat dissipation container in a heat conduction manner, so that temperature differences are generated at two sides of the heat dissipation container. The liquid in the closed space of the heat dissipation container can generate convection due to temperature difference and can be used for balancing the temperature of the high-temperature side and the low-temperature side of the battery module.
In order to achieve the above object, the present invention provides a battery device with a thermal protection mechanism, comprising: the battery comprises a plurality of battery cells, wherein each battery cell comprises two bottom surfaces and a side surface, and the side surface is positioned between the two bottom surfaces; at least one heat dissipation container, adjacent to a plurality of battery cells, includes: a frame including at least a perforated portion or a recessed portion; at least one film connected to the frame and covering the through hole or the notch to form sealed space between the film and the frame, wherein the film is adjacent to at least one bottom surface of the battery cells; and a liquid placed in the closed space of the heat dissipation container, wherein the liquid is water or an aqueous solution.
The invention provides another battery device with a thermal protection mechanism, which comprises: the battery comprises a plurality of battery cells, wherein each battery cell comprises two bottom surfaces and a side surface, and the side surface is positioned between the two bottom surfaces; at least one heat dissipation container, adjacent to a plurality of battery cells, includes: a frame including at least a perforated portion; two films connected to the frame and covering the perforated portions, and forming a closed space between the two films and the frame, wherein the films contact the sides of the plurality of battery cells; and a liquid placed in the closed space of the heat dissipation container, wherein the liquid is water or an aqueous solution.
In at least one embodiment, the frame includes a first surface, a second surface, and a side surface, the side surface connects the first surface and the second surface, and the film is two and connects the first surface and the second surface respectively.
In at least one embodiment, the battery device with the thermal protection mechanism further includes at least one connecting bracket, wherein the connecting bracket is used for connecting the frame and dividing the closed space between the frame and the film into a plurality of accommodating spaces.
In at least one embodiment, the connecting bracket is provided with a concave part or a connecting hole, and the concave part or the connecting hole is connected with the accommodating spaces at two sides of the connecting bracket.
In at least one embodiment, the battery device with the thermal protection mechanism further includes at least one heat conducting unit located between the sides of the adjacent battery cells, the heat conducting unit faces the connection bracket, and the battery cells face the accommodating space.
In at least one embodiment, the battery device with the thermal protection mechanism further includes a plurality of conductive plates connected in series or in parallel with the plurality of battery cells, and the plurality of conductive plates are located between the bottom surface of the battery cells and the film of the heat dissipation container.
In at least one embodiment, the film comprises at least one metal layer and at least one plastic layer.
In at least one embodiment, the battery device with the thermal protection mechanism further includes a plurality of protrusions disposed on the first surface and the second surface of the frame, and a recess is formed between the adjacent protrusions, wherein one of the films connects the first surface and the protrusion on the first surface, and the other film connects the second surface and the protrusion on the second surface.
In at least one embodiment, the battery cells are positioned in the concave portions of the heat dissipation container, and the convex portions of the heat dissipation container are positioned between adjacent battery cells.
Drawings
Fig. 1 is an exploded perspective view of an embodiment of a battery device with a thermal protection mechanism of the present invention.
Fig. 2 is a schematic side exploded view of an embodiment of a battery device with a thermal protection mechanism of the present invention.
Fig. 3 is an exploded perspective view of an embodiment of a heat sink container of a battery device with a thermal protection mechanism of the present invention.
Fig. 4 is a perspective view of an embodiment of a heat sink container of a battery device with a thermal protection mechanism of the present invention.
Fig. 5 is an exploded perspective view of yet another embodiment of a battery device with a thermal protection mechanism of the present invention.
Fig. 6 is an exploded perspective view of an embodiment of a heat sink container of a battery device with a thermal protection mechanism of the present invention.
Fig. 7 is an exploded perspective view of a heat sink container of a battery device with a thermal protection mechanism according to another embodiment of the present invention.
Fig. 8 is an exploded perspective view of a heat sink container of a battery device with a thermal protection mechanism according to another embodiment of the present invention.
Fig. 9 is an exploded perspective view of yet another embodiment of a battery device with a thermal protection mechanism of the present invention.
Reference numerals illustrate: 10-a battery device having a thermal protection mechanism; 11-a heat sink container; 111-frame; 1111—a first surface; 1113-a second surface; 1115-side surface; 1117-connecting a stent; 1119-a recess; 112-a perforated portion; 113-a film; 114-closing the space; 115-a boss; 116-a depression; 118-accommodation space; 12-conducting strips; 13-battery cells; 130-battery module; 131-bottom side; 133-side; 15-liquid; 17-a heat conducting unit.
Detailed Description
Please refer to fig. 1 and 2, which are a schematic exploded perspective view and a schematic exploded side view of a battery device with a thermal protection mechanism according to an embodiment of the present invention. Fig. 3 and 4 are an exploded perspective view and a perspective view, respectively, of an embodiment of a heat sink container for a battery device with a thermal protection mechanism according to the present invention. As shown in the figure, the battery device 10 with the heat protection mechanism mainly includes at least one heat dissipation container 11 and a plurality of battery cells 13, wherein the heat dissipation container 11 is adjacent to the battery cells 13, for example, at two ends of the battery cells 13.
As shown in fig. 3 and 4, the heat dissipation container 11 includes a frame 111 and two films 113, the frame 111 includes a perforated portion 112, the two films 113 are respectively disposed on two surfaces of the frame 111, and the two films 113 cover the perforated portion 112 on the frame 111 to form a closed space 114 between the frame 111 and the films 113.
The enclosed space 114 is provided with a liquid 15, wherein the liquid 15 may be water or an aqueous solution. In one embodiment of the present invention, the liquid 15 occupies only a portion of the enclosed space 114, while the other enclosed spaces 114 do not hold the liquid 15. The liquid 15 may flow in the enclosed space 114 and be under the action of gravity and located at the bottom of the enclosed space 114, and the enclosed space 114 where the liquid 15 is located may have gas or water vapor. In various embodiments, the enclosed space 114 may be filled with the liquid 15.
Specifically, the frame 111 may include a first surface 1111, a second surface 1113, and a side surface 1115. Side surface 1115 connects first surface 1111 and second surface 1113. The two films 113 are respectively connected to the first surface 1111 and the second surface 1113 of the frame 111, and the films 113 are disposed on the first surface 1111 and the second surface 1113 of the square frame 111 by, for example, adhesive, brazing (bonding) or soldering (welding), so as to form a rectangular parallelepiped heat dissipation container 11. In various embodiments, the film 113 may also be an adhesive tape and is attached to the first surface 1111, the second surface 1113 and the side surface 1115 of the frame 111.
In another embodiment of the present invention, the perforated portion 112 of the frame 111 may be a recess, and the number of the films 113 is one, and the perforated portion is used to cover the recess of the frame 111, so that the recess forms a closed space 114. The frame 111 may be made of a metal material with high thermal conductivity, such as aluminum or copper, wherein the frame 111 may be connected to the battery cells 13 via the film 113, so as to facilitate the heat transfer from the battery cells 13 to the frame 111 and the solution 15, and reduce the temperature of the battery cells 13.
As shown in fig. 2, the battery cell 13 includes two bottom surfaces 131 and a side surface 133, wherein the side surface 133 is located between the two bottom surfaces 131, so that the appearance of the battery cell 13 approximates to a column, such as a cylinder. One of the bottom surfaces 131 of the battery cells 13 may be a positive electrode, while the other bottom surface 131 and/or the side surface 133 are negative electrodes.
The plurality of conductive sheets 12 are used to connect a plurality of battery cells 13 in series and/or parallel to form the battery module 130. In an embodiment of the present invention, the number of the heat dissipation containers 11 may be two and adjacent to the two bottom surfaces 131 of the battery cells 13, respectively. In another embodiment of the present invention, the number of heat dissipation containers 11 may be one and adjacent to one of the bottom surfaces 131 of the battery cells 13.
Specifically, the film 113 of the heat dissipation container 11 is adjacent to at least one bottom surface 131 of the battery cell 13, or a conductive sheet 12 is disposed between the bottom surface 131 of the battery cell 13 and the film 113 of the heat dissipation container 11, for example, the positive electrode and/or the negative electrode of the battery cell 13 may directly contact the film 113 of the heat dissipation container 11, or contact the film 113 of the heat dissipation container 11 via the conductive sheet 12. When Thermal runaway (Thermal runaway) occurs in the battery cell 13, the high temperature gas is typically ejected from the battery cell 13 through a valve in the bottom surface 131 (e.g., positive electrode) and contacts the film 113 of the heat dissipating container 11.
When the film 113 is contacted with a high-temperature gas, the film 113 is broken, so that the liquid 15 in the closed space 114 of the heat radiation container 11 is ejected or flows out of the heat radiation container 11 through the broken holes in the film 113. The liquid 15 ejected from the heat radiation container 11 contacts the thermal runaway battery cells 13 and lowers the temperature of the thermal runaway battery cells 13.
In an embodiment of the present invention, a water-absorbing layer, such as porous metal or porous ceramic, may be disposed in the enclosed space 114, and the liquid 15 is absorbed through the water-absorbing layer. When the film 113 is broken, part of the liquid 15 is ejected or flows out of the heat dissipation container 11 through the broken holes on the film 113 and directly contacts the thermal runaway battery cells 13, and part of the liquid 15 is absorbed by the water absorption layer.
The liquid 15 adsorbed by the water absorbing layer continuously absorbs heat from the thermal runaway battery cells 13 and changes from a liquid state to a gas state to absorb a large amount of heat from the thermal runaway battery cells 13. The vaporization heat of water is 40.8 kj/mol, which is equivalent to 2266 kj/kg, and a large amount of heat can be absorbed by the thermal runaway battery cell 13 when water is converted into steam, so that the liquid 15 installed in the heat dissipating container 11 of the present invention is preferably water or an aqueous solution.
Generally, the temperature of the thermal runaway battery cell 13 is typically between 160 and 240 degrees celsius, and in one embodiment of the present invention, the thickness, material, and other factors of the thin film 113 may be adjusted such that the thin film 113 breaks between 160 and 240 degrees celsius. In one embodiment of the present invention, the film 113 may be a metal film or a plastic film, wherein the metal film includes a laminate of at least one metal layer and at least one plastic layer, such as an aluminum foil and polyethylene, and the film 113 and the frame 111 may be connected by hot pressing.
In addition, when the battery module 130 includes a plurality of battery cells 13 connected in series, the battery cells 13 at both sides of the battery module 130 may generate a temperature difference during the charge and discharge processes. As shown in fig. 2, the temperature of the battery cells 13 located on the left side may be lower than the temperature of the battery cells 13 located on the right side, and the battery cells 13 on the right side may age faster than the battery cells 13 on the left side after a plurality of charge and discharge.
In the embodiment of the present invention, the high-temperature battery cell 13 may transfer heat to the low-temperature battery cell 13 through the frame 111, and may also transfer heat to the liquid 15 in the sealed space 114 through the frame 111 and/or the film 113. Specifically, the temperature of the liquid 15 at the right side of the enclosed space 114 is higher than the temperature of the liquid 15 at the left side, so that the liquid 15 in the enclosed space 114 generates convection, and the temperature of each battery cell 13 is balanced, so as to prolong the service life of the battery module 130.
As shown in fig. 5, the frame 111 of the heat dissipating container 11 may include at least one connecting bracket 1117, wherein the connecting bracket 1117 is located in the through hole 112 or the recess of the frame 111, and divides the closed space 114 between the frame 111 and the film 113 into a plurality of accommodating spaces 118, and the film 113 connects the frame 111 and the connecting bracket 1117.
In an embodiment of the present invention, the plurality of battery cells 13 are arranged in a matrix, and the heat conducting unit 17 may be disposed between the side surfaces 133 of the adjacent battery cells 13, wherein the heat conducting unit 17 faces the connection bracket 1117, and the battery cells 13 face the accommodating space 118. For example, the heat conducting unit 17 may be a circular, quadrangular or polygonal column made of metal, and one or both ends of the heat conducting unit 17 may be connected to the connection bracket 1117 of the frame 111 via the film 113. The heat generated from the battery cells 13 may be transferred to the heat conductive unit 17 via the side 133 and transferred to the connection brackets 1117 of the frame 111 via one or both ends of the heat conductive unit 17.
As shown in fig. 6, at least a recess 1119 or a connection hole may be formed in the connection bracket 1117 of the frame 111, and the receiving spaces 118 located at both sides of the connection bracket 1117 may be connected through the recess 1119 or the connection hole.
As shown in fig. 7, the frame 111 may include a plurality of protrusions 115, and a recess 116 is formed between adjacent protrusions 115. In an embodiment of the present invention, the first surface 1111 and the second surface 1113 of the frame 111 may have the protrusions 115, wherein the protrusions 115 disposed on the first surface 1111 and the protrusions 115 disposed on the second surface 1113 may be staggered. As shown in fig. 8, the protruding portions 115 provided on both sides of the frame 111 may extend across the perforated portion 112 in the frame 111, and columnar protruding portions 115 may be formed on both sides of the perforated portion 112.
The two films 113 are respectively connected to the first surface 1111 and the second surface 1113 of the frame 111 and cover the perforated portion 112, so as to form a closed space 114 between the two films 113 and the frame 111. In practice, one of the films 113 connects the first surface 1111 and the protrusion 115 on the first surface 1111, and the other film 113 connects the second surface 1113 and the protrusion 115 on the second surface 1113.
In the above-described embodiment of the present invention, the heat dissipation container 11 is mainly disposed at the bottom surface 131 of the battery cell 13 such that the film 113 of the heat dissipation container 11 is adjacent to the bottom surface 131 of the battery cell 13. In another embodiment of the present invention, as shown in fig. 9, the heat dissipation container 11 may be disposed between two adjacent battery cells 13, wherein the film 113 of the heat dissipation container 11 may contact the sides 133 of the plurality of battery cells 13. The battery cells 13 may be placed in the recess 116 of the heat dissipation container 11 such that the sides 133 of the battery cells 13 are positioned within the recess 116 and the protrusions 115 of the heat dissipation container 11 are positioned between adjacent battery cells 13. In this way, the contact area between the side 133 of the battery cell 13 and the heat dissipation container 11 can be increased, and the efficiency of transferring heat from the battery cell 13 to the heat dissipation container 11 can be improved.
In practical applications, the battery module 130 may include a plurality of battery cells 13 and a plurality of heat dissipation containers 11, wherein the heat dissipation containers 11 may fill up gaps between adjacent battery cells 13 as much as possible, and the side 133 of each battery cell 13 contacts at least one heat dissipation container 11 to enhance heat dissipation effect.
The foregoing description is only one preferred embodiment of the present invention and is not intended to limit the scope of the invention, i.e., the equivalents and modifications of the shape, construction, characteristics and spirit of the invention as defined in the claims should be construed as being included in the scope of the invention.
Claims (12)
1. A battery device having a thermal protection mechanism, comprising:
the battery comprises a plurality of battery cells, wherein each battery cell comprises two bottom surfaces and a side surface, and the side surface is positioned between the two bottom surfaces;
at least one heat dissipation container, adjacent to the battery cells, comprises:
a frame including at least a perforated portion or a recessed portion; and
at least one film connected to the frame and covering the perforated portion or the groove, and forming a closed space between the film and the frame, wherein the film is adjacent to at least one of the bottom surfaces of the plurality of battery cells; and
And the liquid is placed in the closed space of the heat dissipation container, wherein the liquid is water or aqueous solution.
2. The battery device with thermal protection mechanism of claim 1, wherein the frame comprises a first surface, a second surface, and side surfaces, the side surfaces connecting the first surface and the second surface, and the membrane is two, connecting the first surface and the second surface, respectively.
3. The battery device with thermal protection mechanism according to claim 1, comprising at least one connecting bracket connected to the frame and dividing the enclosed space between the frame and the membrane into a plurality of receiving spaces.
4. The battery device with a heat protection mechanism according to claim 3, wherein a recess or a connection hole is provided on the connection bracket, and the receiving spaces located at both sides of the connection bracket are connected via the recess or the connection hole.
5. The battery device with thermal protection mechanism of claim 4, further comprising at least one heat conducting unit located between the sides of adjacent battery cells, the heat conducting unit facing the connection bracket and the battery cells facing the receiving space.
6. The battery device with thermal protection mechanism of claim 1, further comprising a plurality of conductive sheets connected in series or parallel to the plurality of battery cells and positioned between the bottom surface of the battery cells and the film of the heat sink.
7. The battery device with thermal protection mechanism of claim 1, wherein the film comprises at least one metal layer and at least one plastic layer.
8. A battery device having a thermal protection mechanism, comprising:
the battery comprises a plurality of battery cells, wherein each battery cell comprises two bottom surfaces and a side surface, and the side surface is positioned between the two bottom surfaces;
at least one heat dissipation container, adjacent to the battery cells, comprises:
a frame including at least a perforated portion; and
two films that connect the frame and cover the perforated portions, and form a closed space between the two films and the frame, wherein the films contact the side surfaces of the plurality of battery cells; and
And the liquid is placed in the closed space of the heat dissipation container, wherein the liquid is water or aqueous solution.
9. The battery device with thermal protection mechanism of claim 8, wherein the frame comprises a first surface, a second surface, and a side surface, the side surface connecting the first surface and the second surface, and the two membranes connecting the first surface and the second surface, respectively.
10. The battery device with thermal protection mechanism of claim 9, comprising a plurality of protrusions disposed on the first and second surfaces of the frame with recesses between adjacent ones of the protrusions, wherein one of the films connects the first surface and the protrusion on the first surface and the other of the films connects the second surface and the protrusion on the second surface.
11. The battery device with thermal protection mechanism of claim 10, wherein the battery cells are positioned within recesses of the heat sink, and wherein the protrusions of the heat sink are positioned between adjacent battery cells.
12. The battery device with thermal protection mechanism of claim 8, wherein the film comprises at least one metal layer and at least one plastic layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210450495.2A CN116995330A (en) | 2022-04-26 | 2022-04-26 | Battery device with thermal protection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210450495.2A CN116995330A (en) | 2022-04-26 | 2022-04-26 | Battery device with thermal protection mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116995330A true CN116995330A (en) | 2023-11-03 |
Family
ID=88532643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210450495.2A Pending CN116995330A (en) | 2022-04-26 | 2022-04-26 | Battery device with thermal protection mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116995330A (en) |
-
2022
- 2022-04-26 CN CN202210450495.2A patent/CN116995330A/en active Pending
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