CN112864545A - Heat self-adaptive module, battery module and battery pack - Google Patents
Heat self-adaptive module, battery module and battery pack Download PDFInfo
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- CN112864545A CN112864545A CN202110287501.2A CN202110287501A CN112864545A CN 112864545 A CN112864545 A CN 112864545A CN 202110287501 A CN202110287501 A CN 202110287501A CN 112864545 A CN112864545 A CN 112864545A
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- 239000007788 liquid Substances 0.000 claims abstract description 70
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000002309 gasification Methods 0.000 claims abstract description 8
- 230000003044 adaptive effect Effects 0.000 claims description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 7
- 238000013021 overheating Methods 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 4
- 238000002955 isolation Methods 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
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- 239000004332 silver Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 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
- 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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- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention belongs to the technical field of batteries, and discloses a heat self-adaptive module, a battery module and a battery pack. This heat adaptability module includes the casing, first connection piece and second connection piece, be provided with first cavity in the casing, fill into conducting liquid in the first cavity, the one end at the casing is worn to establish by first connection piece, and the one end of first connection piece stretches into in the first cavity, the second connection piece sets up with first connection piece relatively, the other end at the casing is worn to establish by the second connection piece, and the one end of second connection piece stretches into in the first cavity, first connection piece is connected with the second connection piece electricity through conducting liquid, when the temperature in the first cavity is higher than predetermineeing the temperature, the gasification reaction takes place for the conducting liquid, the liquid level height decline of conducting liquid, first connection piece disconnection is connected with the electricity of second connection piece. The heat self-adaptive module realizes recycling and electric connection isolation, reduces cost, enhances controllability of over-current, overheating and thermal runaway risks, and improves capacity of allowing over-current and over-voltage.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a heat self-adaptive module, a battery module and a battery pack.
Background
With the wide-range application of new energy automobiles, the safety performance (especially the thermal safety performance during charging and discharging) of the new energy automobiles becomes the focus of public attention, and therefore, the over-current overheating and thermal runaway prevention of the battery cells, the battery modules and the battery system become one of the cores of the safety of the new energy application. In the prior art, overcurrent of a single battery cell and a single module is prevented by adopting the effect of local overheating fusing caused by reducing the cross sectional areas of tabs and busbars, and overcurrent and thermal protection of a battery pack are usually realized by adopting relays such as IGBT/MOSFET (insulated gate bipolar transistor/metal-oxide-semiconductor field effect transistor).
However, the above preventive measures have slow response of circuit breaking, and cannot effectively inhibit heat generation side reactions of the cell module and the single cell; the on-off of the battery pack relay is often limited by the inherent overcurrent capacity of less than 5A, and the battery pack relay cannot directly act on and cut off the electrical connection between modules in a system and between single electric cores, so that the overcurrent, overheat and thermal runaway risks of the battery pack and the battery module are uncontrollable; and the scheme of realizing circuit disconnection by local overheating fusing of the lug and the bus has the defects of incapability of recycling and high cost.
Disclosure of Invention
The invention aims to provide a heat self-adaptive module which can be recycled, has controllable risks of overcurrent, overheating and thermal runaway and allows higher overcurrent and overvoltage capacity.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a heat self-adaptability module, includes casing, first connection piece and second connection piece, be provided with first cavity in the casing, fill into conducting liquid in the first cavity, first connection piece is worn to establish the one end of casing, just the one end of first connection piece stretches into in the first cavity, the second connection piece with first connection piece sets up relatively, the second connection piece is worn to establish the other end of casing, just the one end of second connection piece stretches into in the first cavity, first connection piece passes through conducting liquid with second connection piece electricity is connected, works as when temperature in the first cavity is higher than predetermineeing the temperature, the conducting liquid takes place gasification reaction, the liquid level height decline of conducting liquid connection piece, first connection piece disconnection with the electricity of second connection piece is connected.
Preferably, the shell comprises an inner shell and an outer shell, a second cavity is formed between the inner shell and the outer shell, the second cavity is filled with the conductive liquid, a first through hole is formed in one end, close to the first connecting piece, of the inner shell, a second through hole is formed in one end, close to the second connecting piece, of the inner shell, and the first through hole and the second through hole are communicated with the first cavity and the second cavity.
Preferably, a first check valve is embedded in the first through hole, and a second check valve is embedded in the second through hole.
Preferably, a sealing film is attached to the inner wall of the first chamber.
Preferably, the first connecting sheet and the second connecting sheet are aluminum sheets or copper sheets, the structure surface of the first connecting sheet extending into the first cavity is plated with nickel, and the structure surface of the second connecting sheet extending into the first cavity is plated with nickel.
Preferably, the length of the first connecting sheet extending into the first cavity is more than or equal to 20% of the length of the first cavity, and the length of the second connecting sheet extending into the first cavity is more than or equal to 20% of the length of the first cavity.
Another object of the present invention is to provide a battery module.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a battery module, includes module shell, electric core stack, busbar and foretell heat adaptability module, the electric core stack sets up in the module shell, the busbar includes the first row body and the second row body, the utmost point ear of electric core stack with the first row body coupling, the first row body passes through heat adaptability module with the second row body electricity is connected, the first row body with first connection piece is connected, the second row body with the second connection piece is connected.
Preferably, the first row body is provided with a long hole, and the tab of the core stack penetrates through the long hole and is bent and attached to the surface of the first row body.
Preferably, the second row body is provided with fastening and connecting holes.
Another object of the present invention is to provide a battery module.
In order to achieve the purpose, the invention adopts the following technical scheme:
a battery pack comprises a plurality of battery modules, wherein the battery modules are sequentially connected in series or in parallel.
The invention has the beneficial effects that: through a shell provided with a first cavity, a first connecting sheet penetrates through one end of the shell, one end of the first connecting sheet extends into the first cavity, a second connecting sheet is arranged opposite to the first connecting sheet, the second connecting sheet penetrates through the other end of the shell, one end of the second connecting sheet extends into the first cavity, and conductive liquid is filled in the first cavity to realize the electric connection of the first connecting sheet and the second connecting sheet; after the current is cut off, the temperature in the first cavity is reduced, when the temperature in the first cavity is lower than the preset temperature, the conductive liquid which is changed into a gaseous state through gasification reaction is subjected to liquefaction reaction, the liquid level of the conductive liquid is raised, the first connecting sheet is electrically connected with the second connecting sheet again, the recycling and the electric connection isolation are realized, the cost is reduced, the controllability of the over-current overheating and thermal runaway risks is enhanced, and the capacity of allowing over-current and over-voltage is improved.
Drawings
FIG. 1 is a schematic diagram of a thermal adaptive module provided by the present invention;
FIG. 2 is a block diagram of the internal structure of a thermal adaptive module provided by the present invention;
fig. 3 is a schematic view of a battery module according to the present invention;
fig. 4 is a schematic diagram of the heat-adaptive module and the bus bar in the battery module according to the present invention.
In the figure:
100. a housing; 101. a first chamber; 102. an inner shell; 103. a housing; 104. a second chamber; 105. a first through hole; 106. a second through hole; 200. a first connecting piece; 300. a second connecting sheet; 400. a module housing; 500. a tab; 600. a bus bar; 601. a first row body; 6011. a long hole; 602. a second row of bodies; 6021. and fastening the connecting hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. 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 of the structures related to the present invention are shown in the drawings, not all of the structures.
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 being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific 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.
The embodiment provides a heat adaptive module, as shown in fig. 1, which includes a housing 100, a first connecting plate 200 and a second connecting plate 300, wherein a first chamber 101 is disposed in the housing 100, a conductive liquid is filled in the first chamber 101, the first connecting plate 200 is disposed at one end of the housing 100 in a penetrating manner, one end of the first connecting plate 200 extends into the first chamber 101, the second connecting plate 300 is disposed opposite to the first connecting plate 200, the second connecting plate 300 is disposed at the other end of the housing 100 in a penetrating manner, one end of the second connecting plate 300 extends into the first chamber 101, one end of the first connecting plate 200 extending into the first chamber 101 and one end of the second connecting plate 300 extending into the first chamber 101 can extend into the conductive liquid, that is, the first connecting plate 200 can be electrically connected to the second connecting plate 300 through the conductive liquid, when an overcurrent and an overheat occurs, a temperature in the first chamber 101 rises, and when a temperature in the first chamber 101 is higher than a preset temperature, the conductive liquid is subjected to gasification reaction, a part of the conductive liquid is gasified into a gas state, at the moment, the liquid level of the conductive liquid is lowered, the first connecting sheet 200 or the second connecting sheet 300 is separated from the contact with the conductive liquid, namely, the first connecting sheet 200 is disconnected from the second connecting sheet 300; after the overcurrent and overheat is relieved, the temperature in the first chamber 101 is reduced, when the temperature in the first chamber 101 is lower than the preset temperature, the part of the gaseous conductive liquid which is subjected to the gasification reaction is subjected to the liquefaction reaction, the gaseous conductive liquid is liquefied into the liquid conductive liquid, the liquid level of the conductive liquid is increased, the first connecting sheet 200 and the second connecting sheet 300 are both contacted with the conductive liquid, namely the first connecting sheet 200 is electrically connected with the second connecting sheet 300, the recycling use and the electric connection isolation of the heat adaptive module are realized, the controllability of the overcurrent and overheat and thermal runaway risks are enhanced, a relay is not used, the relay is not limited by the inherent overcurrent of the relay, and the capacity of allowing overcurrent and overvoltage is improved.
Alternatively, as shown in fig. 2, the casing 100 in this embodiment includes an inner casing 102 and an outer casing 103, a second chamber 104 is formed between the inner casing 102 and the outer casing 103, a conductive liquid is filled in the second chamber 104, a first through hole 105 is formed at an end of the inner casing 102 close to the first connecting plate 200, the first through hole 105 communicates the first chamber 101 with the second chamber 104, a second through hole 106 is formed at an end of the inner casing 102 close to the second connecting plate 300, the second through hole 106 communicates the first chamber 101 with the second chamber 104, the conductive liquid in the first chamber 101 and the conductive liquid in the second chamber 104 have the same liquid level by using the principle of a communicating vessel, when an overcurrent occurs, the temperature in the first chamber 101 rises, when the temperature in the first chamber 101 is higher than a preset temperature, the conductive liquid undergoes a gasification reaction, a part of the conductive liquid is gasified into a gaseous state, and the gaseous conductive liquid enters the second chamber 104 through the second through hole 106, at this time, the liquid level of the conductive liquid drops, and the second connecting piece 300 is separated from the contact with the conductive liquid, that is, the first connecting piece 200 is disconnected from the second connecting piece 300; after the overcurrent and overheat are relieved, the temperature in the first chamber 101 and the second chamber 104 is reduced, when the temperature in the first chamber 101 and the temperature in the second chamber 104 are lower than the preset temperature, the part of the gaseous conductive liquid in the second chamber 104, which is subjected to the gasification reaction, is subjected to the liquefaction reaction, the gaseous conductive liquid is liquefied into the liquid conductive liquid, the liquid level of the conductive liquid in the second chamber 104 is raised and higher than the liquid level of the conductive liquid in the first chamber 101, the conductive liquid in the second chamber 104 flows into the first chamber 101 through the first through hole 105, the liquid level of the conductive liquid in the first chamber 101 is raised, the first connecting piece 200 and the second connecting piece 300 are both in contact with the conductive liquid, namely, the first connecting piece 200 is electrically connected with the second connecting piece 300. The on-off, the thermal adaptability and the thermal runaway protection of the thermal adaptive module are realized through the communicating vessel principle of the first chamber 101 and the second chamber 104. Optionally, the second chamber 104 may be divided into a plurality of relatively independent chambers, each independent chamber is provided with a first through hole 105 and a second through hole 106 in a matching manner, which communicate the independent chambers with the first chamber 101, and the plurality of relatively independent chambers and the first chamber 101 are also based on the communicating principle, which is not described herein again.
Further, a first check valve is embedded in the first through hole 105, a second check valve is embedded in the second through hole 106, the flow direction of the first check valve is from the second chamber 104 to the first chamber 101, the flow direction of the second check valve is from the first chamber 101 to the second chamber 104, so that the conductive liquid in the first chamber 101 is heated and gasified into a gaseous state, the conductive liquid enters the second chamber 104 through the second check valve, the liquid level of the conductive liquid in the first chamber 101 drops, the second connecting sheet 300 is separated from the conductive liquid to break the heat adaptive module circuit, and meanwhile, the gaseous conductive liquid entering the second chamber 104 can be prevented from flowing back to the first chamber 101.
Optionally, a sealing film is attached to the inner wall of the first chamber 101, so that the conductive liquid can be prevented from corroding the inner wall of the first chamber 101 by the sealing film, and meanwhile, the sealing film can play an insulating role; preferably, a sealing film is also attached to the inner wall of the second chamber 104 to prevent the conductive liquid from corroding the inner wall of the second chamber 104 and performing insulation; the sealing film may be made of, but not limited to, PI or PET.
The first connection sheet 200 and the second connection sheet 300 in this embodiment may be aluminum sheets, copper sheets, nickel sheets, or silver sheets, when the first connection sheet 200 and the second connection sheet 300 are aluminum sheets or copper sheets, the surface of the part of the structure of the first connection sheet 200 extending into the first cavity 101 is plated with nickel, the surface of the part of the structure of the second connection sheet 300 extending into the first cavity 101 is plated with nickel, and the nickel plating is performed on the part of the structure of the first connection sheet 200 and the part of the structure of the second connection sheet 300 extending into the first cavity 101, so that the corrosion resistance of the first connection sheet 200 and the second connection sheet 300 can be improved, and the heat adaptive module failure caused by corrosion of the first connection sheet 200 and the second connection sheet 300 can be prevented.
Optionally, the length of the first connecting sheet 200 extending into the first cavity 101 is greater than or equal to 20% of the length of the first cavity 101, and the length of the second connecting sheet 300 extending into the first cavity 101 is greater than or equal to 20% of the length of the first cavity 101, so as to ensure the working stability of the heat adaptive module; as a preferable technical scheme, the length of the second connecting sheet 300 extending into the conductive liquid is more than or equal to 50% of the total length of the second connecting sheet 300. Further, the first connecting sheet 200 and the second connecting sheet 300 extend into the first cavity 101 in a bending manner, the part of the structure of the first connecting sheet 200 and the second connecting sheet 300 extending into the first cavity 101 is tightly attached to the inner wall of the first cavity 101, and the first connecting sheet 200 and the second connecting sheet 300 are tightly attached to the same side of the inner wall, when the heat adaptive module is horizontally placed with the inner wall as a bottom surface, the thickness of the first connecting sheet 200 soaked in the conductive liquid is more than or equal to 50% of the total thickness of the first connecting sheet 200, and the thickness of the second connecting sheet 300 soaked in the conductive liquid is more than or equal to 50% of the total thickness of the second connecting sheet 300. The conductive liquid in this embodiment may be formed by mixing an organic solvent, a solid conductive agent, and an ionic conductive agent, wherein the organic solvent preferably has a boiling point temperature of 70 ℃ or lower.
The present embodiment also provides a battery module, as shown in fig. 3 and 4, including a module housing 400, a cell stack (not shown), a bus bar 600 and the heat adaptive module provided in the above embodiments, wherein the cell stack is arranged in the module case 400, the busbar 600 comprises a first row body 601 and a second row body 602, the tab 500 of the cell stack is connected with the first row body 601, the first row body 601 is electrically connected with the second row body 602 through the heat adaptive module, the first row body 601 is connected with the first connecting piece 200, the second row body 602 is connected with the second connecting piece 300, that is, in this embodiment, the first bank 601, the heat adaptive module, and the second bank 602 are sequentially connected in series, when overcurrent and overheat, the heat adaptive module disconnects the electrical connection between the first connection piece 200 and the second connection piece 300, and at the same time, the first row body 601 disconnects the electrical connection between the first row body 602 and the second row body, so that overheat protection of the battery module is realized.
Optionally, the first row body 601 is provided with an elongated hole 6011, and the tab 500 of the electric core stack passes through the elongated hole 6011 and is bent and attached to the surface of the first row body 601, so that on one hand, the tightness between the tab 500 of the electric core stack and the first row body 601 can be realized, on the other hand, the structural stability between the tab 500 of the electric core stack and the first row body 601 can be ensured, and the tab 500 of the electric core stack and the first row body 601 are prevented from falling off. Preferably, the first row body 601 is provided with a plurality of heat-melting holes, and the first row body 601 can be fixed on one end of the module housing 100 through the heat-melting holes to fix the bus bar 600.
Alternatively, the second row body 602 is provided with the fastening connection hole 6021, by which series/parallel connection between a plurality of battery modules can be achieved, and two battery modules connected in series/parallel with each other are connected by the fastening connection hole 6021 provided on the second row body 602; preferably, the second row body 602 may be, but is not limited to, in an L-shaped structure, and the fastening connection hole 6021 is disposed at an end of the second row body 602 away from the second connection piece 300, so that the second row body 602 in the L-shaped structure is more convenient to install.
Further, the thickness of the first connection piece 200 is > 50% of the thickness of the first row body 601, and the width of the first connection piece 200 is > 40% of the width of the first row body 601; preferably, the thickness of the second connecting piece 300 is more than 50% of the thickness of the second row body 602, and the width of the second connecting piece 300 is more than 40% of the width of the second row body 602; further, the thickness of the first row body 601 is the same as that of the second row body 602, and the width of the first row body 601 is the same as that of the second row body 602, so as to meet the requirement of overcurrent of the total output of the battery module.
Furthermore, the first row body 601 is provided with a first connecting groove, the first connecting sheet 200 extends into the first connecting groove, the first connecting sheet 200 and the first connecting groove are fixedly connected through brazing, the second row body 602 can also be provided with a second connecting groove, the second connecting sheet 300 extends into the second connecting groove, and the second connecting sheet 300 and the second connecting groove are fixedly connected through brazing, so that the reliability of connection between the busbar 600 and the heat adaptive module is realized; preferably, the solder for soldering adopts a solder containing indium, tin and silver components to ensure that the temperature of the melting point of soldering is less than or equal to 220 ℃, the first connecting sheet 200 can be separated from the first row body 601 during infrared laser and resistance heating, and similarly, the second connecting sheet 300 can be separated from the second row body 602 during infrared laser and resistance heating to realize the disassembly and assembly of the heat adaptive module.
The present embodiment further provides a battery pack, which includes a plurality of battery modules provided in the above embodiments, and the plurality of battery modules are connected in series or in parallel in sequence, wherein two adjacent battery modules are connected through a fastening connection hole 6021 disposed on the second row body 602.
Compared with the conventional mode of adding one-time fusing fuses to a single battery cell, a battery cell stack and a battery module, the heat self-adaptive module, the battery module and the battery pack provided by the invention can realize heat self-adaptation, have self-recovery characteristics and are low in comprehensive cost; compared with the existing and researched PNP semiconductor material IGBT/MOSFET relay, the heat self-adaptive module, the battery module and the battery pack provided by the invention can take current and voltage resistance into consideration, the ranges of the current and voltage resistance are larger than those of the current and voltage resistance, the upper limit of overcurrent and overheat temperature is further reduced, and the electric connection disconnection, overheat protection and thermal runaway protection below 70 ℃ can be reduced; the thermal adaptive module, the battery module and the battery pack provided by the invention have higher application value in the lithium ion battery in terms of electric connection disconnection below 70 ℃, overheating protection and thermal runaway protection, and the optimal working temperature of the lithium ion battery is 20-40 ℃, and the SEI failure temperature is about 80 ℃, so that the lithium ion module and the battery pack are more favorable for protecting lithium ions from a lithium ion core material and a monomer layer and ensuring thermal safety; the heat self-adaptability module that this embodiment provided adopts the linker principle to fill the blank of electric power, electric transmission and transformation fields such as battery overcurrent/overheat protection, and can recycle, has reduced production and later maintenance cost, provides new thinking for solving the electricity transmission, electricity and connects.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A heat adaptability module is characterized by comprising a shell (100), a first connecting piece (200) and a second connecting piece (300), wherein a first cavity (101) is arranged in the shell (100), conductive liquid is filled in the first cavity (101), the first connecting piece (200) penetrates through one end of the shell (100), one end of the first connecting piece (200) extends into the first cavity (101), the second connecting piece (300) is opposite to the first connecting piece (200), the second connecting piece (300) penetrates through the other end of the shell (100), one end of the second connecting piece (300) extends into the first cavity (101), the first connecting piece (200) is electrically connected with the second connecting piece (300) through the conductive liquid, when the temperature in the first cavity (101) is higher than a preset temperature, the conductive liquid is subjected to gasification reaction, the liquid level of the conductive liquid is lowered, and the first connecting sheet (200) is disconnected from the second connecting sheet (300).
2. The heat adaptability module according to claim 1, wherein the housing (100) comprises an inner shell (102) and an outer shell (103), a second chamber (104) is formed between the inner shell (102) and the outer shell (103), the second chamber (104) is filled with the conductive liquid, a first through hole (105) is formed at one end of the inner shell (102) close to the first connecting piece (200), a second through hole (106) is formed at one end of the inner shell (102) close to the second connecting piece (300), and the first through hole (105) and the second through hole (106) are communicated with the first chamber (101) and the second chamber (104).
3. The thermal adaptivity module according to claim 2, wherein a first one-way valve is embedded in the first through hole (105) and a second one-way valve is embedded in the second through hole (106).
4. The thermally adaptive module according to claim 1, characterized in that the inner wall of the first chamber (101) is provided with a sealing membrane in abutment.
5. The heat adaptive module according to claim 1, characterized in that the first connection tab (200) and the second connection tab (300) are aluminum or copper sheets, the structural surface of the first connection tab (200) protruding into the first chamber (101) is nickel plated, and the structural surface of the second connection tab (300) protruding into the first chamber (101) is nickel plated.
6. The heat adaptivity module according to claim 1, wherein the first connection tab (200) protrudes into the first chamber (101) for a length of more than 20% of the length of the first chamber (101), and the second connection tab (300) protrudes into the first chamber (101) for a length of more than 20% of the length of the first chamber (101).
7. A battery module comprising a module case (400), a core stack disposed in the module case (400), a bus bar (600), and the heat adaptive module of any one of claims 1 to 6, the bus bar (600) comprising a first bank (601) and a second bank (602), a tab (500) of the core stack being connected to the first bank (601), the first bank (601) being electrically connected to the second bank (602) through the heat adaptive module, the first bank (601) being connected to the first connecting plate (200), and the second bank (602) being connected to the second connecting plate (300).
8. The battery module according to claim 7, wherein the first row body (601) is provided with an elongated hole (6011), and the tab (500) of the core stack penetrates through the elongated hole (6011) and is bent to fit on the surface of the first row body (601).
9. The battery module according to claim 7, wherein the second row body (602) is provided with fastening connection holes (6021).
10. A battery pack comprising a plurality of battery modules according to any one of claims 7 to 9, wherein the plurality of battery modules are connected in series or in parallel in this order.
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| CN202110287501.2A CN112864545A (en) | 2021-03-17 | 2021-03-17 | Heat self-adaptive module, battery module and battery pack |
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| CN202110287501.2A CN112864545A (en) | 2021-03-17 | 2021-03-17 | Heat self-adaptive module, battery module and battery pack |
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