CN115663332B - Battery module - Google Patents
Battery module Download PDFInfo
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- CN115663332B CN115663332B CN202211106237.9A CN202211106237A CN115663332B CN 115663332 B CN115663332 B CN 115663332B CN 202211106237 A CN202211106237 A CN 202211106237A CN 115663332 B CN115663332 B CN 115663332B
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- liquid cooling
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- cooling plate
- heat
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- 239000007788 liquid Substances 0.000 claims abstract description 129
- 238000001816 cooling Methods 0.000 claims abstract description 128
- 230000017525 heat dissipation Effects 0.000 claims abstract description 42
- 239000003292 glue Substances 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000110 cooling liquid Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 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
- 229910001416 lithium ion Inorganic materials 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
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking 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
- 238000009413 insulation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003870 refractory metal Substances 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
- 239000000126 substance Substances 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
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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, and relates to the technical field of batteries. The battery module comprises a battery cell and a heat dissipation exhaust assembly, wherein the heat dissipation exhaust assembly comprises a liquid cooling plate and an exhaust plate which are arranged side by side, 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, the exhaust plate is internally provided with the exhaust channel, the surface of the liquid cooling plate is adhered to the surface of the battery cell through heat conducting glue or heat conducting structural glue, an exhaust through hole is formed in the exhaust plate and communicated with the exhaust channel, a pressure release hole is formed in the battery cell, and the exhaust through hole is opposite to the pressure release hole so as to receive gas released from the pressure release hole. In the application, the heat dissipation and exhaust assembly comprises the liquid cooling channel and the exhaust channel which are mutually independent, so that heat dissipation and pressure relief can be achieved. Through set up heat conduction glue or heat conduction structural adhesive at the liquid cooling plate surface, can play the fixed to the 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 electronic equipment, electric vehicles, electric toys and the like. In the existing battery pack design, a pressure relief hole is formed in the battery cell to release internal pressure when the battery cell is out of control. And, still need set up the radiator unit in the battery module and carry out thermal management to the electric core. However, in the conventional battery module, the matching structure of the related components for releasing pressure and dissipating heat of the battery cells is not reasonable enough, so that the discharged materials released by the battery cells cannot be well contained after being ejected, and the ejected materials easily affect other functional structures such as the heat dissipating components.
Disclosure of Invention
The application aims to provide a heat dissipation and exhaust assembly and a battery module, which can well dissipate heat of a battery cell and contain exhausted gas and other substances of the battery cell in case of thermal runaway.
Embodiments of the application may be implemented as follows:
the application provides a battery module, which comprises a battery cell and a heat dissipation and 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 adhered to 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 cell 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 alternative embodiment, the liquid cooling plate is provided with a limit groove, and the heat-conducting glue or the heat-conducting structural glue is paved in the limit groove.
In an alternative embodiment, the heat dissipation exhaust assembly further includes a limiting member 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 side walls of the limiting groove.
In an alternative embodiment, the liquid cooling plate is integrally formed with the exhaust plate.
In an alternative embodiment, the heat dissipation exhaust assembly further comprises at least one pair of limiting pieces, wherein the limiting pieces are arranged on the surface of the liquid cooling plate, and a limiting groove is formed between the two limiting pieces in pair.
In an alternative embodiment, the liquid cooling plate and the air exhaust plate are both bar-shaped plates, the limit groove is a bar-shaped groove, the extending directions of the liquid cooling plate, the air exhaust plate and the limit groove are consistent, and the liquid cooling plate and the air exhaust plate are arranged in the width direction.
In an alternative embodiment, the heat dissipation exhaust assembly comprises an exhaust plate and two liquid cooling plates, wherein the two liquid cooling plates are respectively arranged on two opposite sides of the exhaust plate, the heat dissipation exhaust assembly further comprises a connecting pipe, and the connecting pipe is used for communicating liquid cooling channels of the two liquid cooling plates.
In an alternative 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 plates.
In an alternative embodiment, a second opening is provided in the side wall of the connecting tube, the second opening communicating the interior and exterior of the connecting tube.
In an alternative embodiment, the battery module comprises a plurality of electric cores, a plurality of exhaust through holes are formed in the exhaust plate, and the pressure release holes of the electric cores are in one-to-one correspondence with the exhaust through holes.
The beneficial effects of the embodiment of the application include:
The battery module comprises a battery cell and a heat dissipation and exhaust assembly, wherein the heat dissipation and exhaust assembly comprises a liquid cooling plate and an exhaust plate which are arranged side by side, 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, the exhaust plate is internally provided with the exhaust channel, the surface of the liquid cooling plate is adhered to the surface of the battery cell through heat-conducting glue or heat-conducting structural glue, the exhaust plate is provided with an exhaust through hole, the exhaust through hole is communicated with the exhaust channel, the battery cell is provided with a pressure release hole, and the exhaust through hole is opposite to the pressure release hole so as to receive gas released from the pressure release hole. In the application, the heat dissipation and exhaust assembly comprises the liquid cooling channel and the exhaust channel which are mutually independent, so that heat dissipation and pressure relief can be achieved. When the battery cell is depressurized from the pressure release hole due to thermal runaway, the ejection in the battery cell can be accommodated by the exhaust channel without affecting other components by dissipation everywhere. And through setting up heat conduction glue or heat conduction structure glue on the liquid cooling board surface, can play the fixed to the electric core, also can strengthen the heat dissipation of electric core simultaneously, consequently have better radiating effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a battery module according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating an assembly of a battery cell and a heat dissipating exhaust assembly according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a battery cell according to an embodiment of the present application at a first viewing angle;
FIG. 4 is a schematic diagram of a battery cell according to an embodiment of the present application at a second viewing angle;
FIG. 5 is a schematic diagram of a heat dissipating exhaust assembly according to an embodiment of the present application;
fig. 6 is a sectional view of a battery module according to an embodiment of the present application;
FIG. 7 is an enlarged view of part VII of FIG. 6;
FIG. 8 is a schematic diagram 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 application;
Fig. 10 is an enlarged view of a portion X in fig. 9.
Icon: 010-battery module; 100-cell; 110-a housing; 120-pole; 130-a pressure relief vent; 200-a heat dissipation exhaust assembly; 210-a liquid cooling plate; 211-a liquid cooling channel; 212-a limit groove; 213-limiting piece; 214-heat-conducting glue; 215-a first opening; 220-exhaust plate; 221-an exhaust passage; 222-exhaust through holes; 230-connecting pipes; 231-a second opening; 240-catheter; 300-a box body; 400-aluminum bars; 500-flexible circuit board.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present application and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a 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 cell unit pressure release valve is positioned at the bottom of the cell and is positioned at the side different from the pole to perform electrothermal separation. In the thermal management design of the power battery system, the liquid cooling plate is mounted in the case, or the liquid cooling plate and the bottom guard plate are mounted with the case, and a receiving cavity is formed in the middle. The discharged matter is discharged after passing through the pressure release valve to destroy the liquid cooling plate and entering the containing cavity. In this design, the ejection material discharged from the battery cells cannot be well contained, and is also difficult to discharge. Therefore, the embodiment of the application designs a battery module which comprises a battery 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 battery core through heat conduction glue or heat conduction structural 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 ejected matters of the battery cell can directly enter the exhaust passage to be accommodated, and the battery cell is also convenient to discharge.
Fig. 1 is a schematic view of a battery module 010 according to an embodiment of the present application; fig. 2 is a schematic diagram illustrating an assembly of a battery cell 100 and a heat dissipating exhaust assembly 200 according to an embodiment of the present application. As shown in fig. 1 and 2, a battery module 010 provided by an embodiment of the application includes a case 300, a heat dissipation and exhaust assembly 200, and a battery cell 100, wherein the battery cell 100 is disposed on the heat dissipation and exhaust assembly 200, and the heat dissipation and exhaust assembly 200 is used for dissipating heat of the battery cell 100 and receiving an ejection of the battery cell 100 when the battery cell 100 is in thermal runaway and depressurized. The battery module 010 includes a plurality of battery cells 100, and the plurality of battery cells 100 are arranged in a first direction. The case 300 is covered outside the battery cell 100 to protect the battery cell 100.
As shown in fig. 2, the battery module 010 provided by the embodiment of the present application further includes structures such as an aluminum row 400, a flexible circuit board (FPC), etc., the aluminum row 400 connects (in series or in parallel) the respective battery cells 100, and the flexible circuit board 500 is connected with the aluminum row 400 through conductive members. In the embodiment of the present application, the battery module 010 may further include a sensor (not shown in the drawing), and the sensor is electrically connected with the flexible circuit board 500, so that the use state (such as a temperature state) of the battery cell 100 may be collected and monitored, thereby facilitating management of the battery module 010 and preventing occurrence of abnormal situations.
Fig. 3 is a schematic diagram of a battery cell 100 according to an embodiment of the application at a first viewing angle; fig. 4 is a schematic diagram of the battery cell 100 under a second view angle according to an embodiment of the application. As shown in fig. 3 and 4, the battery cell 100 according to the embodiment of the present application has a terminal 120 and a pressure relief hole 130, and the terminal 120 and the pressure relief hole 130 are respectively disposed at opposite ends of the battery cell 100. The battery cell 100 comprises a shell 110, and a winding core and electrolyte are arranged in the shell 110. The housing 110 in this embodiment is a rectangular parallelepiped. The number of the poles 120 is two, corresponding to the positive electrode and the negative electrode respectively, and the poles 120 are arranged at the top end of the battery cell 100. The pressure release hole 130 is disposed at the bottom end of the housing 110 of the battery cell 100 and is located at the center of the bottom. In this embodiment, a relief valve may be disposed at the relief hole 130, where the relief valve normally seals the relief hole 130, but when the internal pressure of the battery cell 100 rises to a threshold value due to thermal runaway, the relief valve is destroyed or separated from the housing 110, so as to open the relief hole 130 to release the pressure. This directional pressure relief ensures that the cell 100 is not prone to explosion due to thermal runaway. In addition, in this embodiment, the pressure relief holes 130 and the pole 120 are disposed on different sides of the battery cell, so as to avoid the phenomenon of short circuit or arcing of the pole 120 caused by the ejectors of the battery cell 100, and improve the safety.
In this embodiment, the pressure relief hole 130 is disposed at the bottom center and is a waist-shaped hole, and in alternative other embodiments, the pressure relief hole 130 may have a circular shape, a rectangular shape, or other shapes, and the disposed position of the bottom of the cell 100 may be adjusted as required.
FIG. 5 is a schematic diagram of a heat dissipating exhaust assembly 200 according to an embodiment of the present application; fig. 6 is a sectional view of a battery module 010 in an embodiment of the present application. As shown in fig. 5 and 6, the heat dissipation and 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 adhered to the surface of the battery cell 100 through a heat conducting adhesive 214, an exhaust through hole 222 is arranged on 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 and exhaust assembly 200, a pressure release hole 130 is arranged on the battery cell 100, and the exhaust through hole 222 is opposite to the pressure release hole 130 to receive gas released from the pressure release hole 130. In alternative other embodiments, the thermally conductive paste 214 may be replaced with a thermally conductive structural paste.
As shown in fig. 5, the liquid cooling plate 210 and the exhaust plate 220 are arranged side by side to have a plate shape as a whole, and thus can collectively support the battery cell 100. In the present embodiment, the liquid cooling plate 210 and the air discharging plate 220 are each in a bar shape and extend in a first direction (the same direction as the arrangement direction of the battery cells 100), and the liquid cooling plate 210 and the air discharging plate 220 are arranged in a second direction perpendicular to the first direction, and the second direction is the own width direction of the liquid cooling plate 210 and the air discharging plate 220. The extending direction of the liquid cooling passage 211 in the liquid cooling plate 210 coincides with the extending direction of the liquid cooling plate 210 (both along the first direction), and the extending direction of the exhaust passage 221 in the exhaust plate 220 coincides with 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 cooling plates 210, the two liquid cooling plates 210 are respectively arranged on two opposite sides of the exhaust plate 220, and the two liquid cooling plates 210 and the exhaust plate 220 support the battery cell 100 together. The heat dissipation exhaust assembly 200 further includes a connection pipe 230, wherein the connection pipe 230 connects the liquid cooling channels 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 openings 215 are connected with the liquid cooling channels 211 and the outside of the liquid cooling plates 210. In the present embodiment, a second opening 231 is formed in the sidewall of the connection pipe 230, and the second opening 231 communicates with the inside and the outside of the connection pipe 230. The first opening 215 is formed at one end of the liquid cooling plate 210 in the length direction, and the connection pipe 230 is connected to the other end of the liquid cooling plate 210 in the length direction, so that the liquid cooling channel 211 is as long as possible. As shown in fig. 5, the second opening 231 may be used as an inlet of the cooling liquid, and the two first openings 215 are 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 used as an inlet of the cooling liquid, and the second opening 231 may be used as an outlet of the cooling liquid. In some alternative embodiments, the second opening 231 may not be provided on the connection 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 for the cooling liquid, and the other serves as an outlet (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 part VII in fig. 6. Referring to fig. 5 and 7, in the present 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 limit groove 212 can be selected according to practical needs, for example, 0.3-5 mm. In this embodiment, the liquid cooling plate 210 and the air exhaust plate 220 are independent, and the materials of the two plates may be selected independently, for example, the materials of the liquid cooling plate 210 and the air exhaust plate 220 are selected as dissimilar metals. As shown in fig. 5 and 7, the heat dissipation and exhaust assembly 200 further includes a limiting member 213, wherein the limiting member 213 is disposed between the liquid cooling plate 210 and the exhaust plate 220 to separate the liquid cooling plate 210 from the exhaust plate 220, and the limiting member 213 forms one of side walls of the limiting groove 212. Specifically, the limiting member 213 protrudes from the bottom of the limiting groove 212, and forms a side wall of one long side of the limiting groove 212. The other opposite side wall of the limit groove 212 is formed by the step surface of the liquid cooling plate 210. The limiting member 213 is used for forming the limiting groove 212 to limit the heat-conducting glue 214 from overflowing to the air exhaust plate 220, and also isolate the area of the air exhaust through hole 222 from the area of the heat-conducting glue 214, so that the discharged material is not easy to escape to the upper side of the liquid cooling plate 210 to affect the heat-conducting glue 214 when the battery cell 100 is depressurized. The heat-conducting glue 214 can bond the battery cell 100, so that the battery cell 100 is fixed relative to the heat-dissipating exhaust component 200, and meanwhile, the heat-conducting glue 214 can reduce an air gap between the liquid cooling plate 210 and the battery cell 100, provide better heat-conducting performance, and enable the cooling liquid in the liquid cooling channel 211 to better take away heat of the battery cell 100.
In the present embodiment, the heat-conducting glue 214 is selected from silicon-based heat-conducting glue 214; the material of the limiting member 213 may be selected from ceramic material, silicon dioxide, and metal after insulation treatment. The insulated metal may be coated with an insulating material on the surface of the metal so that the limiting member 213 is electrically isolated from the exhaust plate 220 and the liquid cooling plate 210. The limiting piece 213 is located between the liquid cooling plate 210 and the air exhaust plate 220, and is used for preventing the eruption from being sprayed to the area outside the air exhaust plate 220 when the battery cell 100 is out of control, so that the tightness of the air exhaust channel 221 is ensured, and meanwhile, the heat-conducting glue 214 is prevented from overflowing into the air exhaust channel 221. The limiting member 213, the exhaust plate 220 and the liquid cooling plate 210 can be connected in an adhesive manner to ensure stability.
As shown in fig. 7, the exhaust channel 221 corresponds to the pressure release hole 130 at the bottom of the battery cell 100 through the exhaust through hole 222, when the battery cell 100 is released from the pressure release hole 130 due to thermal runaway, the gas and the ejected material inside the battery cell 100 enter the exhaust channel 221 through the exhaust through hole 222, and the exhaust channel 221 can accommodate the exhaust gas and the ejected material, so that the influence of the dissipation of the four parts on other components of the battery module 010 is avoided. In the present embodiment, the number of the exhaust through holes 222 on the exhaust plate 220 is plural and corresponds to the number of the battery cells 100, so that the pressure release holes 130 of each battery cell 100 can be in one-to-one correspondence with each exhaust through hole 222 to realize pressure release. 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 passage 221 may be provided with an outlet to exhaust the exhaust of the battery cell 100 to the outside of the battery module 010. In this embodiment, the exhaust channels 221 are flat cavities, and in other embodiments, the shape of the exhaust channels 221 may be adjusted, such as channels designed to have a circular cross section.
As shown in fig. 7, the liquid cooling passage 211 in the liquid cooling plate 210 includes a plurality of parallel spaced sub-passages, each of which is parallel to the liquid cooling plate 210 and extends along the length direction 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 merges into the connection pipe 230 and the other end merges into the first opening 215. Of course, in alternative embodiments, the specific structure of the liquid cooling channel 211 may be modified, for example, the liquid cooling plate 210 has a flat tube shape, and an integral, flat liquid cooling channel 211 is formed inside the liquid cooling plate; or the liquid cooling passage 211 is formed in a detour in the liquid cooling plate 210, so that uniform heat dissipation can be achieved. In the embodiment of the present application, the cooling liquid flowing in the liquid cooling channel 211 may be water, which has the characteristics of large specific heat capacity and low cost, and in alternative other embodiments, other types of liquid may be selected as the cooling liquid.
FIG. 8 is a schematic diagram of a heat dissipating 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. In an alternative embodiment, as shown in fig. 8 to 10, the liquid cooling plate 210 and the exhaust plate 220 may be integrally formed, i.e. may be integrally formed of the same material, such as a refractory metal. The liquid cooling plate 210 and the exhaust plate 220 are integrally designed, so that the overall stability of the heat dissipation and exhaust assembly 200 is better, and the problems of cracking and the like caused by different thermal expansion coefficients of different plate bodies are not easy to cause.
In the embodiment of fig. 8 to 10, two liquid cooling plates 210 are also arranged on two sides of the exhaust plate 220, and due to the integrated structure, the strip-shaped limiting members 213 are disposed on the surface of the liquid cooling plates 210 to form the limiting grooves 212 for accommodating the heat-conducting glue 214. In this embodiment, a pair of limiting members 213 are disposed on each liquid cooling plate 210, and the limiting members 213 are bar-shaped and extend along the length direction of the liquid cooling plate 210. A limiting groove 212 is formed between the two limiting pieces 213 in pair to limit the heat-conducting glue 214 from overflowing laterally. In this embodiment, the height of the limiting member 213 is selected to be 0.3-5 mm, and the thickness is selected according to the compression rate of the heat-conducting glue 214 and the height design of the heat-conducting glue 214.
In the embodiment of fig. 8, the connection pipe 230 connecting the two liquid cooling plates 210 is not provided with the second opening 231, so in this embodiment, the two liquid cooling passages 211 are arranged in series, 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.
In summary, the embodiment of the application provides a battery module 010, which includes a battery cell 100 and a heat dissipation and exhaust assembly 200, wherein the heat dissipation and 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 adhered to the surface of the battery cell 100 through a heat conducting adhesive 214 or a heat conducting structural adhesive, an exhaust through hole 222 is arranged on the exhaust plate 220, the exhaust through hole 222 is communicated with the exhaust channel 221, the heat conducting adhesive 214 or the heat conducting structural adhesive is located on the same side of the heat dissipation and exhaust assembly 200, a pressure release hole 130 is arranged on the battery cell 100, and the exhaust through hole 222 is opposite to the pressure release hole 130 to receive gas released from the pressure release hole 130. In the present application, the heat dissipation and exhaust assembly 200 includes the liquid cooling passage 211 and the exhaust passage 221 which are independent of each other, and thus both heat dissipation and pressure relief can be achieved. When the cell 100 is depressurized from the pressure release hole 130 due to thermal runaway, the ejection in the cell 100 can be accommodated by the air discharge channel 221 without affecting other components. In addition, the heat conducting glue 214 or the heat conducting structural glue is arranged on the surface of the liquid cooling plate 210, so that the fixing of the battery cell 100 can be realized, and meanwhile, the heat dissipation of the battery cell 100 can be enhanced, and therefore, the heat dissipation effect is good.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. The battery module is characterized by comprising a battery cell and a heat dissipation and 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 adhered to the surface of the battery cell through heat conducting glue or heat conducting structural glue;
an exhaust passage is arranged in the exhaust plate, an exhaust through hole is formed in the exhaust plate, the exhaust through hole is communicated with the exhaust passage, and the exhaust passage is used for accommodating the ejectors of the battery cells;
The battery cell 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;
the battery module comprises a plurality of battery cells which are arranged in a arraying mode, the exhaust plate extends along the arraying direction of the plurality of battery cells, the extending direction of the exhaust channel in the exhaust plate is consistent with the extending direction of the exhaust plate, a plurality of exhaust through holes are formed in the exhaust plate, and the pressure relief holes of the battery cells correspond to the exhaust through holes one by one.
2. The battery module according to claim 1, wherein the liquid cooling plate is provided with a limit groove, and the heat-conducting glue or the heat-conducting structural glue is laid in the limit groove.
3. The battery module of 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 constituting one of side walls of the limiting groove.
4. The battery module of claim 2, wherein the liquid cooling plate is integrally formed with the vent plate.
5. The battery module of claim 4, wherein the heat dissipation and exhaust assembly further comprises at least one pair of limiting members, the limiting members are disposed on the surface of the liquid cooling plate, and the limiting grooves are formed between the pair of limiting members.
6. The battery module according to claim 2, wherein the liquid cooling plate and the air discharging plate are both in a shape of a bar, the limiting groove is a shape of a bar, the extending directions of the liquid cooling plate, the air discharging plate, and the limiting groove are identical, and the liquid cooling plate and the air discharging plate are arranged in the width direction thereof.
7. The battery module according to claim 1, wherein the heat-dissipating exhaust assembly includes one exhaust plate and two liquid cooling plates, the two liquid cooling plates being arranged on opposite sides of the exhaust plate, respectively, and further includes a connection pipe that communicates the liquid cooling passages of the two liquid cooling plates.
8. The battery module according to claim 7, wherein first openings are provided in the two liquid cooling plates, respectively, and the first openings communicate the liquid cooling channels with the outside of the liquid cooling plates.
9. The battery module according to claim 7, wherein a second opening is opened at a side wall of the connection pipe, the second opening communicating the inside and the outside of the connection pipe.
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| CN202211106237.9A CN115663332B (en) | 2022-09-09 | 2022-09-09 | Battery module |
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| CN202211106237.9A CN115663332B (en) | 2022-09-09 | 2022-09-09 | Battery module |
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| CN115663332A CN115663332A (en) | 2023-01-31 |
| CN115663332B true CN115663332B (en) | 2024-08-30 |
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| 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 | 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 |
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| 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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| 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 |
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Country or region after: China Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Applicant after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Address before: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Applicant before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |
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