CN115663332A - Battery module - Google Patents
Battery module Download PDFInfo
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- CN115663332A CN115663332A CN202211106237.9A CN202211106237A CN115663332A CN 115663332 A CN115663332 A CN 115663332A CN 202211106237 A CN202211106237 A CN 202211106237A CN 115663332 A CN115663332 A CN 115663332A
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- exhaust
- plate
- liquid cooling
- battery module
- heat dissipation
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- 239000007788 liquid Substances 0.000 claims abstract description 109
- 238000001816 cooling Methods 0.000 claims abstract description 106
- 230000017525 heat dissipation Effects 0.000 claims abstract description 50
- 239000003292 glue Substances 0.000 claims abstract description 31
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 239000000110 cooling liquid Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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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- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The application provides a battery module, relates to battery technical field. The battery module comprises an electric core and a heat dissipation exhaust assembly, the heat dissipation exhaust assembly comprises a liquid cooling plate and an exhaust plate which are arranged side by side, the electric core is arranged on the liquid cooling plate and the exhaust plate, a liquid cooling channel is arranged in the liquid cooling plate, an exhaust channel is arranged in the exhaust plate, the surface of the liquid cooling plate is bonded with the surface of the electric core through heat conduction glue or heat conduction structure glue, an exhaust through hole is formed in the exhaust plate, the exhaust through hole is communicated with the exhaust channel, a pressure relief hole is formed in the electric core, and the exhaust through hole is opposite to the pressure relief hole to receive gas released from the pressure relief hole. In this application, heat dissipation exhaust subassembly includes mutually independent liquid cooling passageway and exhaust passage, consequently can compromise heat dissipation and pressure release. Through set up heat-conducting glue or heat conduction structure glue on the liquid cooling plate surface, can enough play the fixed to electric core, also can strengthen the heat dissipation of electric core simultaneously, consequently have better radiating effect.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery module.
Background
The lithium ion battery has the advantages of small volume, high energy density, long cycle service life, long storage time and the like, and is widely applied to the fields of some electronic equipment, electric vehicles, electric toys and the like. In the design of the existing battery pack, a pressure relief hole is formed in a battery core so as to release internal pressure when the battery core is out of control due to heat. And still need set up radiator unit among the battery module and carry out the thermal management to electric core. However, in the existing battery module, the matching structure of the related components for pressure relief and heat dissipation of the battery core is not reasonable enough, so that the discharged materials released by the battery core can not be well accommodated after being sprayed out, and the sprayed materials easily influence other functional structures such as the heat dissipation component.
Disclosure of Invention
The utility model provides a purpose includes provides a heat dissipation exhaust subassembly and battery module, and it can dispel the heat well and accept the combustion gas and other materials of electric core when thermal runaway to electric core.
The embodiment of the application can be realized as follows:
the application provides a battery module, which comprises a battery core and a heat dissipation exhaust assembly;
the heat dissipation and exhaust assembly comprises a liquid cooling plate and an exhaust plate which are arranged side by side, and the battery cell is arranged on the liquid cooling plate and the exhaust plate;
a liquid cooling channel is arranged in the liquid cooling plate, and the surface of the liquid cooling plate is bonded with the surface of the battery cell through heat conducting glue or heat conducting structural glue;
an exhaust channel is arranged in the exhaust plate, an exhaust through hole is formed in the exhaust plate, and the exhaust through hole is communicated with the exhaust channel;
the battery core is provided with a pressure relief hole, and the exhaust through hole is opposite to the pressure relief hole so as to receive gas released from the pressure relief hole.
In an optional embodiment, a limit groove is formed in the liquid cooling plate, and the heat-conducting glue or the heat-conducting structural glue is laid in the limit groove.
In an optional embodiment, the heat dissipation and exhaust assembly further includes a limiting member, the limiting member is disposed between the liquid cooling plate and the exhaust plate to separate the liquid cooling plate from the exhaust plate, and the limiting member forms one of the sidewalls of the limiting groove.
In an alternative embodiment, the liquid cooled panel is integrally formed with the vent panel.
In an optional embodiment, the heat dissipation exhaust assembly further includes at least one pair of limiting members, the limiting members are disposed on a surface of the liquid cooling plate, and a limiting groove is formed between the two limiting members in the pair.
In an optional embodiment, the liquid cooling plate and the exhaust plate are both strip-shaped plate-shaped, the limiting groove is a strip-shaped groove, the extending directions of the liquid cooling plate, the exhaust plate and the limiting groove are consistent, and the liquid cooling plate and the exhaust plate are arranged in the width direction of the liquid cooling plate and the exhaust plate.
In an optional embodiment, the heat dissipation and exhaust assembly includes an exhaust plate and two liquid cooling plates, the two liquid cooling plates are respectively arranged on two opposite sides of the exhaust plate, and the heat dissipation and exhaust assembly further includes a connecting pipe, and the connecting pipe connects the liquid cooling channels of the two liquid cooling plates.
In an optional embodiment, the two liquid cooling plates are respectively provided with a first opening, and the first openings are communicated with the liquid cooling channel and the outside of the liquid cooling plate.
In an alternative embodiment, the connecting tube has a second opening formed in a side wall thereof, and the second opening communicates between the inside and the outside of the connecting tube.
In an optional embodiment, the battery module includes a plurality of battery cells, a plurality of exhaust through holes are opened on the exhaust plate, and the pressure relief hole of each battery cell corresponds to each exhaust through hole one to one.
The beneficial effects of the embodiment of the application include:
the battery module of this application embodiment includes electric core and heat dissipation exhaust assembly, heat dissipation exhaust assembly is including the liquid cooling board and the air discharge plate that set up side by side, electric core sets up on liquid cooling board and air discharge plate, be provided with the liquid cooling passageway in the liquid cooling board, be provided with exhaust passage in the air discharge plate, the surface bonding of liquid cooling board surface through heat conduction glue or heat conduction structure glue and electric core, the exhaust through hole has been seted up on the air discharge plate, exhaust through hole and exhaust passage intercommunication, be provided with the pressure release hole on the electric core, the exhaust through hole is relative with the pressure release hole in order to receive the gas from the pressure release hole release. In this application, heat dissipation exhaust subassembly includes mutually independent liquid cooling passageway and exhaust passage, consequently can compromise heat dissipation and pressure release. When the cell is subjected to pressure relief Kong Xieya due to thermal runaway, the jet in the cell can be accommodated by the exhaust channel without dissipating everywhere and affecting other components. And, through set up heat conduction glue or heat conduction structure glue on the liquid cooling plate surface, can enough play the fixed to electric core, also can strengthen the heat dissipation of electric core simultaneously, consequently have better radiating effect.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic view of a battery module according to an embodiment of the present disclosure;
fig. 2 is a schematic assembly diagram of a battery cell and a heat dissipation vent assembly according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a battery cell at a first viewing angle in an embodiment of the present application;
fig. 4 is a schematic diagram of a cell at a second viewing angle according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of a heat dissipation exhaust assembly according to an embodiment of the present application;
fig. 6 is a cross-sectional view of a battery module according to an embodiment of the present application;
FIG. 7 is an enlarged view of section VII of FIG. 6;
FIG. 8 is a schematic view of a heat dissipating exhaust assembly according to another embodiment of the present application;
fig. 9 is a schematic view of a battery module according to another embodiment of the present disclosure;
fig. 10 is an enlarged view of a portion X in fig. 9.
Icon: 010-a battery module; 100-electric core; 110-a housing; 120-pole; 130-pressure relief holes; 200-a heat dissipation exhaust assembly; 210-liquid cooling plate; 211-liquid cooling channels; 212-a limiting groove; 213-a limit stop; 214-thermally conductive glue; 215-a first opening; 220-an exhaust plate; 221-an exhaust channel; 222-a vent through hole; 230-connecting pipe; 231-a second opening; 240-a catheter; 300-a box body; 400-aluminum row; 500-flexible circuit board.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the present invention product is usually put into use, it is only for convenience of describing the present application and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
The lithium ion battery has the advantages of small volume, high energy density, long cycle service life, long storage time and the like, and is widely applied to the fields of electronic equipment, electric vehicles, electric toys and the like. In some battery pack designs, the battery cell pressure relief valve is positioned at the bottom of the battery cell and is different from the pole column for electric-heat separation. Therefore, in the thermal management design of the power battery system, the liquid cooling plate is installed in the box body, or the liquid cooling plate, the bottom protection plate and the box body are installed, and the middle part of the liquid cooling plate forms an accommodating cavity. The discharge is discharged after entering the containing cavity through the pressure release valve and destroying the liquid cooling plate. In this design, the discharged material from the cell cannot be stored well and is difficult to discharge. Therefore, the embodiment of the application designs a battery module, which comprises an electric core and an exhaust heat dissipation assembly, wherein an exhaust channel and a liquid cooling channel are independently arranged, and a liquid cooling plate is connected with the electric core through heat conduction glue or heat conduction structure glue so as to increase the heat dissipation effect; the exhaust passage is communicated with the pressure relief hole through the exhaust through hole, so that the ejecta of the battery cell can directly enter the exhaust passage to be accommodated, and the ejecta is also convenient to discharge.
Fig. 1 is a schematic diagram of a battery module 010 according to an embodiment of the present disclosure; fig. 2 is a schematic view illustrating an assembly of the battery cell 100 and the heat dissipation vent assembly 200 according to an embodiment of the present disclosure. As shown in fig. 1 and fig. 2, the battery module 010 provided in the embodiment of the present application includes a case 300, a heat dissipation exhaust assembly 200, and a battery cell 100, where the battery cell 100 is disposed on the heat dissipation exhaust assembly 200, and the heat dissipation exhaust assembly 200 is configured to dissipate heat from the battery cell 100, and receive an ejection from the battery cell 100 when the battery cell 100 is thermally out of control and is depressurized. The battery module 010 includes a plurality of battery cells 100, and the plurality of battery cells 100 are arranged in the first direction. The case 300 covers the exterior of the battery cell 100 to protect the battery cell 100.
As shown in fig. 2, the battery module 010 provided in the embodiment of the present application further includes an aluminum row 400, a Flexible Printed Circuit (FPC), and the like, where the aluminum row 400 connects (in series or in parallel) the battery cells 100, and the FPC 500 is connected to the aluminum row 400 through a conductive component. In this embodiment, the battery module 010 may further include a sensor (not shown in the figure), and the sensor is electrically connected to the flexible printed circuit 500, so that the usage status (for example, the temperature status) of the battery cell 100 may be collected and monitored, and thus, the battery module 010 is managed and abnormal situations are prevented.
Fig. 3 is a schematic diagram of a battery cell 100 under a first viewing angle in an embodiment of the present disclosure; fig. 4 is a schematic diagram of the battery cell 100 under a second viewing angle in an embodiment of the present application. As shown in fig. 3 and 4, the battery cell 100 of the embodiment of the present application has a terminal post 120 and a pressure relief hole 130, and the terminal post 120 and the pressure relief hole 130 are respectively disposed at two opposite ends of the battery cell 100. The battery cell 100 includes a casing 110, and a winding core and an electrolyte are disposed in the casing 110. The housing 110 is a rectangular parallelepiped in this embodiment. The number of the poles 120 is two, and the two poles correspond to the positive electrode and the negative electrode, respectively, and the poles 120 are disposed on the top end of the battery cell 100. The pressure relief hole 130 is disposed at the bottom end of the battery cell 100 casing 110 and is located at the center of the bottom. In this embodiment, a pressure relief valve may be disposed at the pressure relief hole 130, and the pressure relief valve normally blocks the pressure relief hole 130, but when the internal pressure of the battery cell 100 rises to a threshold value due to thermal runaway, the pressure relief valve may be damaged or separated from the casing 110, so as to open the pressure relief hole 130 to release the pressure. This directional pressure relief ensures that the battery cell 100 is not susceptible to explosion due to thermal runaway. In addition, in the embodiment, the pressure relief hole 130 and the terminal post 120 are disposed on different two sides of the battery cell, so that short circuit of the terminal post 120 or arc discharge caused by the jet of the battery cell 100 is avoided, and safety is improved.
In this embodiment, the pressure relief hole 130 is disposed in the center of the bottom and is a waist-shaped hole, in other optional embodiments, the shape of the pressure relief hole 130 may be circular, rectangular, or other shapes, and the disposition position of the bottom of the battery cell 100 may also be adjusted as needed.
FIG. 5 is a schematic view of a heat dissipating exhaust assembly 200 according to an embodiment of the present application; fig. 6 is a cross-sectional view of a battery module 010 according to an embodiment of the present application. As shown in fig. 5 and fig. 6, the heat dissipation exhaust assembly 200 includes a liquid cooling plate 210 and an exhaust plate 220 arranged side by side, the battery cell 100 is arranged on the liquid cooling plate 210 and the exhaust plate 220, a liquid cooling channel 211 is arranged in the liquid cooling plate 210, an exhaust channel 221 is arranged in the exhaust plate 220, the surface of the liquid cooling plate 210 is bonded to the surface of the battery cell 100 through a heat conducting adhesive 214, an exhaust through hole 222 is formed in the exhaust plate 220, the exhaust through hole 222 is communicated with the exhaust channel 221, the heat conducting adhesive 214 and the exhaust through hole 222 are located on the same side of the heat dissipation exhaust assembly 200, a pressure relief hole 130 is formed in the battery cell 100, and the exhaust through hole 222 is opposite to the pressure relief hole 130 to receive the gas released from the pressure relief hole 130. In alternative embodiments, the thermally conductive adhesive 214 may be replaced by a thermally conductive structural adhesive.
As shown in fig. 5, the liquid cooling plate 210 and the exhaust plate 220 are arranged side by side and have a plate shape as a whole, so that the battery cells 100 can be carried together. In this embodiment, the liquid cooling plate 210 and the exhaust plate 220 are both strip-shaped plate-shaped and extend along a first direction (the same as the arrangement direction of the battery cells 100), and the liquid cooling plate 210 and the exhaust plate 220 are arranged in a second direction, where the second direction is perpendicular to the first direction and is the width direction of the liquid cooling plate 210 and the exhaust plate 220. The extending direction of the liquid cooling channels 211 in the liquid cooling plate 210 is the same as the extending direction of the liquid cooling plate 210 (both along the first direction), and the extending direction of the exhaust channels 221 in the exhaust plate 220 is the same as the extending direction of the exhaust plate 220 (both along the first direction).
In this embodiment, the heat dissipation and exhaust assembly 200 includes an exhaust plate 220 and two liquid-cooled plates 210, the two liquid-cooled plates 210 are respectively arranged on two opposite sides of the exhaust plate 220, and the battery cell 100 is supported by the exhaust plate 220 and the two liquid-cooled plates 210 together. The heat dissipation and exhaust assembly 200 further comprises a connecting pipe 230, the connecting pipe 230 connects the liquid cooling passages 211 of the two liquid cooling plates 210, the two liquid cooling plates 210 are respectively provided with a first opening 215, and the first opening 215 connects the liquid cooling passages 211 and the outside of the liquid cooling plates 210. In this embodiment, a second opening 231 is formed on a sidewall of the connection pipe 230, and the second opening 231 communicates the inside and the outside of the connection pipe 230. The first opening 215 is opened at one end of the liquid-cooled plate 210 in the longitudinal direction, and the connection pipe 230 is connected to the other end of the liquid-cooled plate 210 in the longitudinal direction, so that the liquid-cooled passage 211 is as long as possible. As shown in fig. 5, the second opening 231 can be used as an inlet of the cooling liquid, the two first openings 215 can be used as outlets of the cooling liquid, and the liquid cooling channels 211 of the two liquid cooling plates 210 are designed in parallel. Of course, the first opening 215 may be an inlet of the coolant and the second opening 231 may be an outlet of the coolant. In some alternative embodiments, the second opening 231 may not be disposed on the connecting pipe 230, so that the liquid cooling channels 211 of the two liquid cooling plates 210 are connected in series, in which case one of the two first openings 215 serves as an inlet and the other serves as an outlet of the cooling liquid (as in the embodiment of fig. 8).
In the present embodiment, a duct 240 is provided at each of the first opening 215 and the second opening 231 so as to communicate with the outside.
Fig. 7 is an enlarged view of a portion VII in fig. 6. Referring to fig. 5 and fig. 7, in the embodiment, a limiting groove 212 is disposed on the liquid cooling plate 210, the heat conducting glue 214 is laid in the limiting groove 212, and the thickness of the heat conducting glue 214 is greater than or equal to the depth of the limiting groove 212, so that the battery cell 100 can contact the heat conducting glue 214. The depth of the limiting groove 212 can be selected according to actual needs, such as 0.3-5 mm. In this embodiment, the liquid cooling plate 210 and the exhaust plate 220 are independent of each other, and the material of the liquid cooling plate 210 and the material of the exhaust plate 220 may be selected independently, for example, the material of the liquid cooling plate 210 and the material of the exhaust plate 220 are selected from different metals. As shown in fig. 5 and 7, the heat dissipation and exhaust assembly 200 further includes a limiting member 213, the limiting member 213 is disposed between the liquid-cooled plate 210 and the exhaust plate 220 to separate the liquid-cooled plate 210 from the exhaust plate 220, and the limiting member 213 forms one sidewall of the limiting groove 212. Specifically, the position-limiting member 213 protrudes from the bottom of the position-limiting groove 212 and forms a sidewall of one long side of the position-limiting groove 212. And the other opposite side wall of the restriction groove 212 is formed by a step surface of the liquid cooling plate 210 itself. The limiting member 213 is used to form a limiting groove 212 to limit the overflow of the thermal conductive adhesive 214 to the exhaust plate 220, and also isolate the area of the exhaust through hole 222 from the area of the thermal conductive adhesive 214, so that the exhaust is not easily dissipated above the liquid cooling plate 210 during the pressure relief of the battery cell 100, thereby affecting the thermal conductive adhesive 214. The heat-conducting glue 214 can be bonded to the battery cell 100, so that the battery cell 100 is fixed relative to the heat dissipation exhaust assembly 200, and meanwhile, the heat-conducting glue 214 can reduce an air gap between the liquid cooling plate 210 and the battery cell 100, so that better heat-conducting performance is provided, and heat of the battery cell 100 can be better taken away by cooling liquid in the liquid cooling channel 211.
In the present embodiment, the thermal conductive paste 214 may be selected from silicon-based thermal conductive pastes 214; the material of the stopper 213 may be selected from ceramic material, silicon dioxide, and metal processed by insulation. The metal subjected to the insulation treatment may be a metal surface coated with an insulating material so that the limiting member 213 is electrically isolated from the exhaust plate 220 and the liquid cooling plate 210. The limiting member 213 is located between the liquid cooling plate 210 and the exhaust plate 220, and prevents the eruption from being sprayed to the region outside the exhaust plate 220 when the battery cell 100 is out of control due to thermal runaway, so as to ensure the sealing property of the exhaust channel 221 and prevent the heat-conducting adhesive 214 from overflowing and entering the exhaust channel 221. The limiting member 213 may be connected to the exhaust plate 220 and the liquid cooling plate 210 by adhesion, so as to ensure stability.
As shown in fig. 7, the exhaust channel 221 corresponds to the pressure relief hole 130 at the bottom of the battery cell 100 through the exhaust through hole 222, when the battery cell 100 is depressurized from the pressure relief hole 130 due to thermal runaway, the gas and the ejecta inside the battery cell 100 enter the exhaust channel 221 through the exhaust through hole 222, and the exhaust channel 221 can contain the exhausted gas and the exhausted material, so as to prevent the other components of the battery module 010 from being affected by the dissipated gas. In this embodiment, the number of the exhaust through holes 222 on the exhaust plate 220 is multiple, and the number of the exhaust through holes corresponds to that of the battery cells 100, so that the pressure relief holes 130 of each battery cell 100 can correspond to the exhaust through holes 222 one to implement pressure relief. The plurality of exhaust through holes 222 are arranged at intervals in the first direction (i.e., the length direction of the exhaust plate 220). In addition, the exhaust channel 221 may be provided with an outlet to exhaust the effluent of the battery cell 100 out of the battery module 010. In this embodiment, the exhaust channel 221 is a flat cavity, and in other embodiments, the shape of the exhaust channel 221 may be adjusted, for example, the exhaust channel is designed as a channel with a circular cross section.
As shown in fig. 7, the liquid cooling passage 211 of the liquid cooling plate 210 includes a plurality of parallel spaced sub-passages, each sub-passage being parallel to the liquid cooling plate 210 and extending along the length of the liquid cooling plate 210. Each sub-channel is arranged in parallel, so that the whole liquid cooling channel 211 can be uniformly distributed in the liquid cooling plate 210, and the heat dissipation effect is more uniform. One end of each sub-channel opens into the connecting tube 230 and the other end into the first opening 215. Of course, in alternative embodiments, the specific structure of the liquid cooling channel 211 may also be adjusted, for example, the liquid cooling plate 210 is in the shape of a flat tube, and the interior of the flat liquid cooling channel 211 is formed as a whole; alternatively, the liquid cooling passages 211 are arranged in the liquid cooling plate 210 in a winding manner, so that uniform heat dissipation can be realized. In the embodiment of the present application, the cooling liquid circulating in the liquid cooling channel 211 may be water, which has the characteristics of large specific heat capacity and low cost, and in alternative embodiments, other types of liquid may be selected as the cooling liquid.
FIG. 8 is a schematic view of a heat sink exhaust assembly 200 according to another embodiment of the present application; fig. 9 is a schematic view of a battery module 010 according to another embodiment of the present application; fig. 10 is an enlarged view of a portion X in fig. 9. As shown in fig. 8 to 10, in an alternative embodiment, the liquid cooling plate 210 and the exhaust plate 220 may be a single-piece structure, that is, they may be integrally formed by using the same material, for example, using a high melting point metal. The liquid cooling plate 210 and the exhaust plate 220 are designed in an integrated manner, so that the overall stability of the heat dissipation and exhaust assembly 200 is better, and the problem of cracking and the like caused by different thermal expansion coefficients of different plate bodies is solved.
In the embodiment of fig. 8 to 10, two liquid-cooled plates 210 are also arranged on two sides of the exhaust plate 220, and because of the integral structure, the strip-shaped limiting members 213 are disposed on the surfaces of the liquid-cooled plates 210 to form the limiting grooves 212 for accommodating the heat conducting adhesive 214. In the present embodiment, each liquid cooling plate 210 is provided with a pair of limiting members 213, and the limiting members 213 are strip-shaped and extend along the length direction of the liquid cooling plate 210. A limiting groove 212 is formed between the two limiting members 213 in a pair to limit the heat conducting glue 214 from overflowing laterally. In the embodiment, the height of the limiting member 213 can be selected from 0.3 to 5mm, and the thickness is selected according to the compression rate of the thermal conductive adhesive 214 and the height design of the thermal conductive adhesive 214.
In the embodiment of fig. 8, the connecting pipe 230 connecting the two liquid-cooled plates 210 is not opened with the second opening 231, so that in this embodiment, the two liquid-cooled channels 211 are arranged in series, and one of the two first openings 215 is used as a seat cooling liquid inlet and the other is used as a cooling liquid outlet.
To sum up, the embodiment of the present application provides a battery module 010, including electric core 100 and heat dissipation exhaust assembly 200, heat dissipation exhaust assembly 200 is including liquid-cooled plate 210 and the exhaust plate 220 that sets up side by side, electric core 100 sets up on liquid-cooled plate 210 and exhaust plate 220, be provided with liquid cooling channel 211 in the liquid-cooled plate 210, be provided with exhaust passage 221 in the exhaust plate 220, liquid-cooled plate 210 surface bonds with electric core 100's surface through heat-conducting glue 214 or heat-conducting structure glue, exhaust through-hole 222 has been seted up on the exhaust plate 220, exhaust through-hole 222 communicates with exhaust passage 221, heat-conducting glue 214 or heat-conducting structure glue are located the same one side of heat dissipation exhaust assembly 200 with exhaust through-hole 222, be provided with pressure release hole 130 on electric core 100, exhaust through-hole 222 is relative with pressure release hole 130 in order to receive the gas from pressure release hole 130 release. In the present application, the heat dissipation and exhaust assembly 200 includes the liquid cooling channel 211 and the exhaust channel 221 which are independent of each other, so that both heat dissipation and pressure relief can be achieved. When the battery cell 100 is discharged from the pressure discharge hole 130 due to thermal runaway, the ejecta in the battery cell 100 can be accommodated by the air discharge channel 221 without dissipating everywhere and affecting other components. Moreover, the heat-conducting glue 214 or the heat-conducting structural glue is disposed on the surface of the liquid cooling plate 210, so that the battery cell 100 can be fixed, and the heat dissipation of the battery cell 100 can be enhanced, thereby achieving a better heat dissipation effect.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A battery module is characterized by comprising a battery core and a heat dissipation exhaust assembly;
the heat dissipation exhaust assembly comprises a liquid cooling plate and an exhaust plate which are arranged side by side, and the battery cell is arranged on the liquid cooling plate and the exhaust plate;
a liquid cooling channel is arranged in the liquid cooling plate, and the surface of the liquid cooling plate is bonded with the surface of the battery cell through heat conducting glue or heat conducting structural glue;
an exhaust channel is arranged in the exhaust plate, an exhaust through hole is formed in the exhaust plate, and the exhaust through hole is communicated with the exhaust channel;
the battery core is provided with a pressure relief hole, and the exhaust through hole is opposite to the pressure relief hole so as to receive gas released from the pressure relief hole.
2. The battery module according to claim 1, wherein the liquid cooling plate is provided with a limiting groove, and the heat conducting glue or the heat conducting structural glue is laid in the limiting groove.
3. The battery module according to claim 2, wherein the heat dissipation and exhaust assembly further comprises a limiting member disposed between the liquid cooling plate and the exhaust plate to separate the liquid cooling plate from the exhaust plate, the limiting member forming one of the sidewalls of the limiting groove.
4. The battery module according to claim 2, wherein the liquid cold plate is integrally formed with the gas discharge plate.
5. The battery module according to claim 4, wherein the heat dissipation and exhaust assembly further comprises at least one pair of limiting members disposed on the surface of the liquid cooling plate, and the limiting grooves are formed between the two limiting members in the pair.
6. The battery module according to claim 2, wherein the liquid-cooled plate and the gas discharge plate are both strip-shaped plate-shaped, the limiting groove is a strip-shaped groove, the liquid-cooled plate, the gas discharge plate and the limiting groove extend in the same direction, and the liquid-cooled plate and the gas discharge plate are arranged in the width direction thereof.
7. The battery module of claim 1, wherein the heat dissipation and exhaust assembly comprises one of the exhaust plate and two of the liquid cooling plates, the two of the liquid cooling plates are respectively disposed on opposite sides of the exhaust plate, and the heat dissipation and exhaust assembly further comprises a connecting pipe, the connecting pipe connects the liquid cooling channels of the two of the liquid cooling plates.
8. The battery module according to claim 7, wherein the two liquid-cooled plates are respectively provided with a first opening, and the first openings communicate the liquid-cooled channel and the outside of the liquid-cooled plates.
9. The battery module according to claim 7, wherein a second opening is formed in a side wall of the connection pipe, and the second opening communicates between the inside and the outside of the connection pipe.
10. The battery module according to claim 1, wherein the battery module comprises a plurality of the battery cells, the exhaust plate is provided with a plurality of the exhaust through holes, and the pressure relief holes of the battery cells correspond to the exhaust through holes one to one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211106237.9A CN115663332B (en) | 2022-09-09 | 2022-09-09 | Battery module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211106237.9A CN115663332B (en) | 2022-09-09 | 2022-09-09 | Battery module |
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| CN115663332A true CN115663332A (en) | 2023-01-31 |
| CN115663332B CN115663332B (en) | 2024-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024082285A1 (en) * | 2022-10-21 | 2024-04-25 | 宁德时代新能源科技股份有限公司 | Heat exchange assembly, battery module, battery and electrical device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212587577U (en) * | 2020-08-21 | 2021-02-23 | 中车时代电动汽车股份有限公司 | Power battery and liquid cooling battery module thereof |
| CN212967942U (en) * | 2020-09-18 | 2021-04-13 | 北京车和家信息技术有限公司 | Battery module |
| CN114566741A (en) * | 2022-03-04 | 2022-05-31 | 杰锋汽车动力系统股份有限公司 | New energy automobile power battery thermal management structure |
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2022
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212587577U (en) * | 2020-08-21 | 2021-02-23 | 中车时代电动汽车股份有限公司 | Power battery and liquid cooling battery module thereof |
| CN212967942U (en) * | 2020-09-18 | 2021-04-13 | 北京车和家信息技术有限公司 | Battery module |
| CN114566741A (en) * | 2022-03-04 | 2022-05-31 | 杰锋汽车动力系统股份有限公司 | New energy automobile power battery thermal management structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024082285A1 (en) * | 2022-10-21 | 2024-04-25 | 宁德时代新能源科技股份有限公司 | Heat exchange assembly, battery module, battery and electrical device |
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| Publication number | Publication date |
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| CN115663332B (en) | 2024-08-30 |
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