CN114374020B - Battery pack and vehicle with same - Google Patents
Battery pack and vehicle with same Download PDFInfo
- Publication number
- CN114374020B CN114374020B CN202111663775.3A CN202111663775A CN114374020B CN 114374020 B CN114374020 B CN 114374020B CN 202111663775 A CN202111663775 A CN 202111663775A CN 114374020 B CN114374020 B CN 114374020B
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- liquid
- bottom plate
- cooling
- battery
- cooling pipe
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- 239000007788 liquid Substances 0.000 claims abstract description 154
- 238000001816 cooling Methods 0.000 claims abstract description 130
- 239000002826 coolant Substances 0.000 claims abstract description 20
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 230000001070 adhesive effect Effects 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims description 49
- 238000005086 pumping Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 13
- 238000009423 ventilation Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000004308 accommodation Effects 0.000 claims 2
- 239000007789 gas Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring 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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- 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
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery pack and a vehicle with the battery pack, wherein a box body of the battery pack comprises a box body frame and a box body bottom plate, and a containing cavity is formed in the periphery of the box body frame and the box body bottom plate; the battery part is arranged in the accommodating cavity and is a single battery cell or a battery module comprising a plurality of battery cells; the battery pack is adhered to the inner surface of the bottom plate of the box body through heat conduction structural adhesive so as to realize heat conduction connection; the liquid inlet component and the liquid outlet component are arranged in the accommodating cavity; the cooling flow channel is arranged on the bottom plate of the box body and is provided with a bottom plate liquid inlet and a bottom plate liquid outlet, the bottom plate liquid inlet is communicated with the liquid inlet assembly, the bottom plate liquid outlet is communicated with the liquid outlet assembly, the liquid inlet assembly is communicated with the liquid outlet assembly and the outside of the box body, and the cooling medium dissipates heat of the battery part through the liquid inlet assembly, the cooling flow channel and the liquid outlet assembly; the liquid-proof air-permeable valves are arranged in the accommodating cavity and are communicated with the cooling flow channels; the battery pack provided by the invention can be disassembled in a nondestructive way, and the thermal runaway control is actively carried out during the thermal runaway.
Description
Technical Field
The invention relates to the technical field of batteries of electric vehicles, in particular to a battery pack and a vehicle with the battery pack.
Background
With the increasing severity of global energy crisis and environmental pollution problems, electric vehicles are rapidly developed, the electric vehicles use electric power as a power source, and a large amount of fossil fuel can be saved by replacing a fuel engine with an electric motor. With the rapid development of electric vehicles, the performance requirements on power batteries are also higher and higher, wherein the improvement of the energy density is a target pursued by all host factories and battery suppliers, an effective way to improve the energy density is to improve the integration level of a battery pack system, and the use of gluing instead of screwing is an effective means to improve the integration level.
Due to the improvement of energy density, the probability of thermal runaway of a battery is also improved, and the system integration level is improved by an adhesive technology, and meanwhile, due to the adhesive characteristic, the disassembly performance is not high after the adhesion is firm, so that the disassembly mode is mainly destructive disassembly aiming at the adhesive technology, and the mode is very unfriendly to echelon utilization, so that the problems are needed to be solved.
Disclosure of Invention
The invention aims to provide a battery pack and a vehicle with the battery pack, so as to solve the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a battery pack, comprising:
the box body comprises a box body frame and a box body bottom plate, and a containing cavity is formed in the periphery of the box body frame and the box body bottom plate;
the battery part is arranged in the accommodating cavity and is a single battery cell or a battery module comprising a plurality of battery cells;
the battery pack is glued on the inner surface of the bottom plate of the box body through the heat-conducting structure glue so as to realize heat-conducting connection;
The liquid inlet component and the liquid outlet component are arranged in the accommodating cavity;
the cooling flow channel is arranged on the bottom plate of the box body and is provided with a bottom plate liquid inlet and a bottom plate liquid outlet, the bottom plate liquid inlet is communicated with the liquid inlet assembly, the bottom plate liquid outlet is communicated with the liquid outlet assembly, the liquid inlet assembly is communicated with the liquid outlet assembly and the outside of the box body, and cooling medium dissipates heat of the battery part through the liquid inlet assembly, the cooling flow channel and the liquid outlet assembly;
The liquid-proof ventilation valves are arranged in the accommodating cavities and are communicated with the cooling flow channels.
Further, the box frame includes the long frame that the interval set up and the wide frame that the interval set up, wherein, wide frame includes preceding wide frame and back wide frame, hold the chamber by long frame with wide frame with the box bottom plate enclose and establish and form, preceding wide frame is provided with the cooling tube via hole, battery part with long frame and wide frame interval set up.
Further, the liquid inlet assembly comprises a first cooling pipe, a second cooling pipe and a liquid storage tank, wherein the first cooling pipe is respectively communicated with the liquid inlet of the bottom plate, the second cooling pipe and the liquid storage tank, the second cooling pipe penetrates through the cooling pipe through hole to be communicated with the outside, external cooling medium flows in through the second cooling pipe, and the second cooling pipe is a unidirectional pipe; the liquid storage tank comprises an electromagnetic valve, and the release or the blocking of liquid in the liquid storage tank can be realized by controlling the electromagnetic valve.
Further, go out the liquid subassembly and include third cooling tube, fourth cooling tube, fifth cooling tube and play liquid three-way valve, third cooling tube, fourth cooling tube and fifth cooling tube's one end respectively with go out liquid three-way valve intercommunication, the third cooling tube other end with the bottom plate liquid outlet intercommunication, the fourth cooling tube other end wear to establish the cooling tube via hole with outside intercommunication, the fifth cooling tube other end with hold the inside intercommunication in chamber.
Further, the method further comprises the following steps:
The battery controller sends an action instruction to the electromagnetic valve;
the temperature detection module is used for detecting the temperature of the battery part, the temperature of the battery part reaches a threshold value, the temperature detection module outputs a protection signal to the battery controller, the protection signal instructs the battery controller to send a protection action instruction to the electromagnetic valve, the protection action instruction is used for instructing the electromagnetic valve to execute a protection action, and the protection action is used for instructing the electromagnetic valve to open the liquid storage tank and release liquid in the liquid storage tank;
The switch module outputs a switch signal to the battery controller, the switch signal instructs the battery controller to send a switch action instruction to the electromagnetic valve, the switch action instruction is used for instructing the electromagnetic valve to execute a switch action, and the switch action is used for instructing the electromagnetic valve to open or close the liquid storage tank so as to release or stop releasing the liquid in the liquid storage tank.
Still further, the cooling circulation pump is further included, before the temperature detection module outputs the protection signal to the battery controller, the liquid pumping signal is used for indicating the battery controller to send out a liquid pumping action command to the cooling circulation pump, the liquid pumping action command is used for indicating the cooling circulation pump to execute the liquid pumping action, the liquid pumping action command is used for indicating the cooling circulation pump to pump out cooling medium in the cooling flow channel, after the cooling medium is pumped out of the cooling flow channel, the battery controller sends out a conversion action command to the liquid outlet three-way valve, the conversion action command is used for indicating the action of the liquid outlet three-way valve conversion pipeline, and the conversion pipeline action is used for converting the communication between the third cooling pipe and the fourth cooling pipe into the communication between the third cooling pipe and the fifth cooling pipe.
Further, the box bottom plate is close to the surface of the accommodating cavity and is provided with a connecting hole, the cooling flow channel is communicated with the liquid-proof ventilation valve through the connecting hole, the liquid-proof ventilation valve is arranged between the battery part and the side wall of the accommodating cavity, the liquid-proof ventilation valves are multiple, gas can pass through the liquid-proof ventilation valves, and liquid cannot pass through the liquid-proof ventilation valves.
Further, the box bottom plate is of an integrated structure, the cooling flow channel is located in the box bottom plate, and the surface, close to the accommodating cavity, of the box bottom plate is in heat conduction connection with the battery part through the heat conduction structural adhesive.
Further, the box bottom plate is split structure, the box bottom plate includes:
The surface, close to the accommodating cavity, of the heat conducting plate is in heat conducting connection with the battery part through the heat conducting structural adhesive;
The runner plate is provided with an accommodating space, and the accommodating space is formed by enclosing two runner long walls arranged at intervals, two runner wide walls arranged at intervals and a runner bottom plate;
The two long ends of the flow guide sheet are respectively connected with the heat conducting plate and the flow channel bottom plate, one wide end of the flow guide sheet is connected with one wide wall of the flow channel plate, the other wide end of the flow guide sheet is arranged at intervals with the other wide wall of the flow channel plate, and a plurality of flow guide sheets are arranged at intervals;
the areas between two adjacent guide plates, the heat conducting plates and the runner plates form a plurality of cooling runners, and cooling medium is circulated in the cooling runners.
According to another aspect of the present invention, there is provided a vehicle including a battery pack, the battery pack being the battery pack described above.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a battery pack which can be disassembled in a non-destructive manner and actively performs thermal runaway control when in thermal runaway.
Drawings
FIG. 1 is an exploded view of a battery pack according to the present invention;
FIG. 2 is a schematic view of a battery pack according to the present invention;
FIG. 3 is a schematic view of the structure of the case in the present invention;
FIG. 4 is an enlarged schematic view of the portion A in FIG. 3;
FIG. 5 is a schematic view of the installation of the liquid outlet and liquid inlet assemblies of the present invention;
FIG. 6 is a schematic view of a liquid inlet assembly;
FIG. 7 is a schematic diagram of a liquid outlet assembly;
FIG. 8 is a schematic diagram of the structure of the bottom plate of the case;
fig. 9 is a schematic diagram showing the connection of electrical components in the present invention.
In the figure: 100. a case; 200. a battery section; 300. a heat conducting structural adhesive; 400. a battery controller; 500. a temperature detection module; 600. a switch module; 700. a cooling circulation pump; 110. a frame of the box body; 120. a bottom plate of the box body; 130. a liquid inlet component; 140. a liquid outlet component; 150. a liquid-proof ventilation valve; 111. a cooling tube via; 121. a cooling flow passage; 131. a first cooling tube; 132. a second cooling tube; 133. a liquid storage tank; 141. a liquid outlet three-way valve; 142. a fourth cooling tube; 143. a third cooling tube; 144. a fifth cooling pipe; 151. a connection hole; 1211. a liquid inlet of the bottom plate; 1212. a bottom plate liquid outlet; 1331. a solenoid valve.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. 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 the drawings from the specification 1 to 9, the present invention provides a technical scheme: a battery pack, comprising: the battery pack comprises a box body 100, a battery part 200, a heat conduction structural adhesive 300, a cooling flow passage 121, a liquid-proof ventilation valve 150, a liquid inlet assembly 130 and a liquid outlet assembly 140; the box body 100 comprises a box body frame 110 and a box body bottom plate 120, and a containing cavity is formed by surrounding the box body frame 110 and the box body bottom plate 120; the battery part 200 is arranged in the accommodating cavity, and the battery part 200 is a single battery cell or a battery module comprising a plurality of battery cells; the battery part 200 is adhered to the inner surface of the bottom plate 120 of the case body through the heat-conducting structural adhesive 300 to realize heat-conducting connection; the liquid inlet assembly 130 and the liquid outlet assembly 140 are disposed in the accommodating cavity; the cooling flow channel 121 is disposed on the bottom plate 120 of the case, the cooling flow channel 121 has a bottom plate liquid inlet 1211 and a bottom plate liquid outlet 1212, the bottom plate liquid inlet 1211 is communicated with the liquid inlet assembly 130, the bottom plate liquid outlet 1212 is communicated with the liquid outlet assembly 140, the liquid inlet assembly 130 and the liquid outlet assembly 140 are communicated with the outside of the case 100, wherein the cooling flow channel 121 is used for cooling medium circulation, and the cooling medium dissipates heat to the battery part 200 through the liquid inlet assembly 130, the cooling flow channel 121 and the liquid outlet assembly 140; the liquid-proof and air-permeable valves 150 are disposed in the accommodating chambers, and the liquid-proof and air-permeable valves 150 are communicated with the cooling flow channels 121.
In this embodiment, the box frame 110 and the box bottom plate 120 are connected by welding or bonding to form the accommodating cavity of the battery portion 200, and the box frame 110 is preferably made of an aluminum profile material, so that the weight can be reduced on the premise of ensuring the strength.
Preferably, as shown in fig. 3, the box frame 110 includes a long frame and a wide frame, wherein the long frame is arranged at intervals, the wide frame includes a front wide frame and a rear wide frame, the accommodating cavity is formed by enclosing the long frame with the wide frame and the box bottom plate 120, the front wide frame is provided with a cooling tube via hole 111, and the battery part 200 is arranged at intervals with the long frame and the wide frame.
Preferably, as shown in fig. 4 and 6, the liquid inlet assembly 130 includes a first cooling pipe 131, a second cooling pipe 132 and a liquid storage tank 133, the first cooling pipe 131 is respectively communicated with the bottom plate liquid inlet 1211, the second cooling pipe 132 and the liquid storage tank 133, the second cooling pipe 132 is connected with the outside of the box 100 through the cooling pipe through hole 111, the external cooling medium flows in through the second cooling pipe 132, and the second cooling pipe 132 is a unidirectional pipe; the liquid storage tank 133 includes a solenoid valve 1331, and the release or stop of the liquid in the liquid storage tank 133 can be achieved by controlling the solenoid valve 1331.
In this embodiment, the liquid in the liquid storage tank 133 is preferably liquid nitrogen.
Preferably, as shown in fig. 7, the liquid outlet assembly 140 includes a third cooling pipe 143, a fourth cooling pipe 142, a fifth cooling pipe 144 and a liquid outlet three-way valve 141, one ends of the third cooling pipe 143, the fourth cooling pipe 142 and the fifth cooling pipe 144 are respectively communicated with the liquid outlet three-way valve 141, the other end of the third cooling pipe 143 is communicated with the bottom plate liquid outlet 1212, the other end of the fourth cooling pipe 142 is communicated with the outside of the box 100 through the cooling pipe via hole 111, and the other end of the fifth cooling pipe 144 is communicated with the inside of the accommodating cavity.
Preferably, as shown in fig. 9, the battery controller 400, the temperature detection module 500, and the switching module 600 are further included; the battery controller 400 transmits an operation command to the solenoid valve 1331; the temperature detection module 500 is configured to detect a temperature of the battery unit 200, where the temperature of the battery unit 200 reaches a threshold value, and the temperature detection module 500 outputs a protection signal to the battery controller 400, where the protection signal instructs the battery controller 400 to send a protection action instruction to the solenoid valve 1331, where the protection action instruction is configured to instruct the solenoid valve 1331 to perform a protection action, and where the protection action is configured to instruct the solenoid valve 1331 to open the liquid storage tank 133 and release the liquid in the liquid storage tank 133; the switching module 600 outputs a switching signal to the battery controller 400, the switching signal instructing the battery controller 400 to send a switching action command to the solenoid valve 1331, the switching action command instructing the solenoid valve 1331 to perform a switching action for instructing the solenoid valve 1331 to open or close the liquid storage tank 133 to release or stop releasing the liquid in the liquid storage tank 133.
Preferably, as shown in fig. 9, a cooling circulation pump 700 is further included; the temperature detection module 500 further sends a liquid pumping signal to the battery controller 400 before outputting a protection signal to the battery controller 400, where the liquid pumping signal is used to instruct the battery controller 400 to send a liquid pumping command to the cooling circulation pump 700, the liquid pumping command is used to instruct the cooling circulation pump 700 to perform a liquid pumping action, the liquid pumping action is used to instruct the cooling circulation pump 700 to pump cooling medium in the cooling flow channel 121 away, after the cooling medium is pumped away from the cooling flow channel 121, the battery controller 400 sends a switching action command to the liquid outlet three-way valve 141, the switching action command is used to instruct the liquid outlet three-way valve 141 to switch the action of a pipeline, and the switching pipeline action is used to switch the communication between the third cooling pipe 143 and the fourth cooling pipe 142 to the communication between the third cooling pipe 143 and the fifth cooling pipe 144.
Preferably, as shown in fig. 2,3 and 4, a connection hole 151 is formed on a surface of the bottom plate 120 of the case close to the accommodating cavity, the connection hole 151 communicates the cooling flow channel 121 with the liquid-proof air-permeable valve 150, and the liquid-proof air-permeable valve 150 is disposed between the battery part 200 and a sidewall of the accommodating cavity.
Preferably, the gas can pass through the liquid-proof air-permeable valve 150, and the liquid cannot pass through the liquid-proof air-permeable valve 150, and in this embodiment, a metal threaded air-permeable valve or a plastic buckle air-permeable valve can be selected.
In this embodiment, when the temperature detection module 500 detects that the temperature of the battery portion 200 in the battery pack exceeds the threshold, the battery pack is in a thermal runaway state, at this time, the temperature detection module 500 outputs a protection signal to the battery controller 400, the protection signal instructs the battery controller 400 to send a protection action instruction to the solenoid valve 1331, the protection action instruction is used to instruct the solenoid valve 1331 to execute a protection action, and the protection action is used to instruct the solenoid valve 1331 to open the liquid storage tank 133 and release the liquid in the liquid storage tank 133, thereby realizing automatic protection of the battery pack in thermal runaway, and reducing larger loss caused to the vehicle.
In this embodiment, when the battery pack needs to be disassembled or the thermal runaway needs to be actively controlled, the switch module 600 may release the low-temperature liquid in the liquid storage tank 133, and the liquid enters the cooling flow channel 121 through the first cooling tube 131 to circulate, and the second cooling tube 132 is a unidirectional flow tube, so as to ensure that the low-temperature liquid does not flow back; the temperature in the battery pack can be quickly reduced to reduce the adhesive force of the heat conduction structural adhesive 300 or to inhibit the thermal runaway of the battery part 200; meanwhile, the low-temperature liquid can be evaporated into low-temperature gas in the circulation process, the low-temperature gas enters the accommodating cavity of the battery pack through the liquid-proof ventilation valve 150, and liquid nitrogen is selected as the low-temperature gas to cool the battery part 200 in the accommodating cavity in the embodiment, so that the cooling effect is enhanced, and the flame-retardant effect is achieved. The number of the liquid-proof and air-permeable valves 150 may be increased or decreased according to the effect of the practical application. Before the low-temperature liquid is released, the cooling medium in the cooling flow passage 121 is pumped back to the cooling medium tank of the whole vehicle, and then the liquid outlet three-way valve 141 of the liquid outlet assembly 140 is controlled, so that the liquid flowing out of the tank body 100 through the fourth cooling pipe 142 is changed into the liquid flowing into the accommodating cavity through the fifth cooling pipe 144.
Preferably, the bottom plate 120 is an integrally formed structure, the cooling flow channel 121 is located in the bottom plate 120, and a surface of the bottom plate 120 near the accommodating cavity is thermally connected to the battery portion 200 through the thermal conductive structural adhesive 300.
Preferably, as shown in fig. 8, the case bottom plate 120 is a split structure, and the case bottom plate 120 includes: a heat conductive plate 122, a flow path plate 123 and a flow guide 124; the surface of the heat conducting plate 122 close to the accommodating cavity is in heat conducting connection with the battery part 200 through the heat conducting structural adhesive 300; the runner plate 123 is provided with an accommodating space, and the accommodating space is formed by two runner long walls arranged at intervals, two runner wide walls arranged at intervals and a runner bottom plate in a surrounding manner; the two long ends of the flow deflector 124 are respectively connected with the heat conducting plate 122 and the runner bottom plate, one wide end of the flow deflector 124 is connected with one wide wall of the runner plate 123, the other wide end of the flow deflector 124 is arranged at intervals with the other wide wall of the runner plate 123, the number of the flow deflectors 124 is plural, and the number of the flow deflectors 124 is arranged at intervals; the cooling flow channels 121 are formed in the regions between the adjacent two guide fins 124, the heat-conducting plate 122, and the flow channel plate 123, and the plurality of cooling flow channels 121 are formed, and the cooling medium in the plurality of cooling flow channels 121 flows in the arrow direction.
According to another aspect of the present invention, there is provided a vehicle including a battery pack, the battery pack being the battery pack described above.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A battery pack, comprising:
the box body comprises a box body frame and a box body bottom plate, and a containing cavity is formed in the periphery of the box body frame and the box body bottom plate;
the battery part is arranged in the accommodating cavity and is a single battery cell or a battery module comprising a plurality of battery cells;
the battery pack is glued on the inner surface of the bottom plate of the box body through the heat-conducting structure glue so as to realize heat-conducting connection;
The liquid inlet component and the liquid outlet component are arranged in the accommodating cavity;
the cooling flow channel is arranged on the bottom plate of the box body and is provided with a bottom plate liquid inlet and a bottom plate liquid outlet, the bottom plate liquid inlet is communicated with the liquid inlet assembly, the bottom plate liquid outlet is communicated with the liquid outlet assembly, the liquid inlet assembly is communicated with the liquid outlet assembly and the outside of the box body, and cooling medium dissipates heat of the battery part through the liquid inlet assembly, the cooling flow channel and the liquid outlet assembly;
The liquid-proof ventilation valves are arranged in the accommodating cavities, the liquid-proof ventilation valves are communicated with the cooling flow channels, cooling medium is evaporated into low-temperature gas in the circulation process, the low-temperature gas enters the accommodating cavities of the battery packs through the liquid-proof ventilation valves, and the low-temperature gas cools and is flame-retardant to the battery parts in the accommodating cavities.
2. The battery pack according to claim 1, wherein the case frame comprises a long frame and a wide frame, the long frame and the wide frame are arranged at intervals, the wide frame comprises a front wide frame and a rear wide frame, the accommodating cavity is formed by surrounding the long frame, the wide frame and the case bottom plate, the front wide frame is provided with cooling pipe through holes, and the battery part and the long frame and the wide frame are arranged at intervals.
3. The battery pack according to claim 2, wherein the liquid inlet assembly comprises a first cooling pipe, a second cooling pipe and a liquid storage tank, the first cooling pipe is respectively communicated with the liquid inlet of the bottom plate, the second cooling pipe and the liquid storage tank, the second cooling pipe penetrates through the cooling pipe through hole to be communicated with the outside, external cooling medium flows in through the second cooling pipe, and the second cooling pipe is a unidirectional pipe; the liquid storage tank comprises an electromagnetic valve, and the release or the blocking of liquid in the liquid storage tank can be realized by controlling the electromagnetic valve.
4. A battery pack according to claim 3, wherein the liquid outlet assembly comprises a third cooling pipe, a fourth cooling pipe, a fifth cooling pipe and a liquid outlet three-way valve, one ends of the third cooling pipe, the fourth cooling pipe and the fifth cooling pipe are respectively communicated with the liquid outlet three-way valve, the other ends of the third cooling pipe are communicated with the liquid outlet of the bottom plate, the other ends of the fourth cooling pipe penetrate through the cooling pipe through holes to be communicated with the outside, and the other ends of the fifth cooling pipe are communicated with the inside of the accommodating cavity.
5. The battery pack of claim 4, further comprising:
The battery controller sends an action instruction to the electromagnetic valve;
the temperature detection module is used for detecting the temperature of the battery part, the temperature of the battery part reaches a threshold value, the temperature detection module outputs a protection signal to the battery controller, the protection signal instructs the battery controller to send a protection action instruction to the electromagnetic valve, the protection action instruction is used for instructing the electromagnetic valve to execute a protection action, and the protection action is used for instructing the electromagnetic valve to open the liquid storage tank and release liquid in the liquid storage tank;
The switch module outputs a switch signal to the battery controller, the switch signal instructs the battery controller to send a switch action instruction to the electromagnetic valve, the switch action instruction is used for instructing the electromagnetic valve to execute a switch action, and the switch action is used for instructing the electromagnetic valve to open or close the liquid storage tank so as to release or stop releasing the liquid in the liquid storage tank.
6. The battery pack of claim 5, further comprising a cooling circulation pump; the temperature detection module is used for sending a liquid pumping signal to the battery controller before outputting a protection signal to the battery controller, the liquid pumping signal is used for indicating the battery controller to send a liquid pumping command to the cooling circulation pump, the liquid pumping command is used for indicating the cooling circulation pump to execute liquid pumping action, the liquid pumping action is used for indicating the cooling circulation pump to pump cooling medium in the cooling flow channel away, after the cooling medium is pumped away from the cooling flow channel, the battery controller sends a conversion action command to the liquid outlet three-way valve, the conversion action command is used for indicating the action of the liquid outlet three-way valve conversion pipeline, and the conversion pipeline action is used for converting communication between the third cooling pipe and the fourth cooling pipe into communication between the third cooling pipe and the fifth cooling pipe.
7. The battery pack according to any one of claims 1to 6, wherein a connection hole is provided in a surface of the bottom plate of the case body near the accommodation chamber, the connection hole communicates the cooling flow passage with the liquid-proof air-permeable valve provided between the battery part and the side wall of the accommodation chamber, and gas can pass through the liquid-proof air-permeable valve, and liquid cannot pass through the liquid-proof air-permeable valve.
8. The battery pack according to claim 1, wherein the bottom plate of the case is of an integrally formed structure, the cooling flow channel is located in the bottom plate of the case, and a surface of the bottom plate of the case, which is close to the accommodating cavity, is thermally connected with the battery part through the thermal conductive structural adhesive.
9. The battery pack of claim 1, wherein the case bottom plate is of a split structure, and the case bottom plate comprises:
The surface, close to the accommodating cavity, of the heat conducting plate is in heat conducting connection with the battery part through the heat conducting structural adhesive;
The runner plate is provided with an accommodating space, and the accommodating space is formed by enclosing two runner long walls arranged at intervals, two runner wide walls arranged at intervals and a runner bottom plate;
The two long ends of the flow guide sheet are respectively connected with the heat conducting plate and the flow channel bottom plate, one wide end of the flow guide sheet is connected with one wide wall of the flow channel plate, the other wide end of the flow guide sheet is arranged at intervals with the other wide wall of the flow channel plate, and a plurality of flow guide sheets are arranged at intervals;
the areas between two adjacent guide plates, the heat conducting plates and the runner plates form a plurality of cooling runners, and cooling medium is circulated in the cooling runners.
10. A vehicle comprising a battery pack according to any one of claims 1 to 9.
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| CN202111663775.3A CN114374020B (en) | 2021-12-31 | 2021-12-31 | Battery pack and vehicle with same |
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| CN202111663775.3A CN114374020B (en) | 2021-12-31 | 2021-12-31 | Battery pack and vehicle with same |
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