CN115764066B - Cylindrical battery liquid cooling module - Google Patents
Cylindrical battery liquid cooling module Download PDFInfo
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- CN115764066B CN115764066B CN202211492542.6A CN202211492542A CN115764066B CN 115764066 B CN115764066 B CN 115764066B CN 202211492542 A CN202211492542 A CN 202211492542A CN 115764066 B CN115764066 B CN 115764066B
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- liquid inlet
- battery cell
- cylindrical battery
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- 239000007788 liquid Substances 0.000 title claims abstract description 363
- 238000001816 cooling Methods 0.000 title claims abstract description 166
- 238000007789 sealing Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 20
- 230000000694 effects Effects 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 6
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 5
- 239000000306 component Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000009471 action 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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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- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a cylindrical battery liquid cooling module which comprises a battery module, wherein the battery module comprises a plurality of rows of battery cell groups which are stacked and arranged, each row of battery cell groups comprises a plurality of cylindrical battery cells, and the battery module further comprises a liquid cooling sleeve connected with the cylindrical battery cells; the liquid cooling sleeve is provided with a mounting cavity with an opening at one end, and the cylindrical battery cell is arranged in the mounting cavity; the liquid cooling sleeve is internally provided with a liquid cooling chamber for flowing a heat exchange medium, the liquid cooling chamber surrounds the mounting cavity, two side surfaces of the liquid cooling sleeve along the radial direction of the mounting cavity are respectively provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively communicated with the liquid cooling chamber; two adjacent liquid cooling sleeves on the battery cell group are connected with each other through a liquid inlet and a liquid outlet. According to the invention, through the arrangement of the liquid cooling sleeve, the outer surface of the cylindrical battery cell can be comprehensively contacted, so that the high-efficiency heat dissipation of the cylindrical battery cell is realized; the liquid cooling chambers on the liquid cooling sleeves on the battery cell group are sequentially connected in series, so that efficient heat dissipation of all cylindrical battery cells in the whole battery module can be realized.
Description
Technical Field
The invention relates to the technical field of cylindrical batteries, in particular to a liquid cooling module of a cylindrical battery.
Background
For the heat dissipation scheme of the cylindrical battery cell, the common form is generally to conduct heat in a bottom cold plate flat-laid mode or a coiled pipe winding mode. The flat cold plate structure exchanges heat through contacting with the bottom end of the battery cell, and the temperature difference between battery monomers is large, so that the effect is poor. Utilize snakelike liquid cooling pipe winding to carry out heat conduction in the battery module, need let the snakelike liquid cooling pipe paste the side that heat conduction silica gel hugged closely cylindrical electric core again to alternate in the clearance between each electric core side, this kind of heat dissipation mode can not guarantee that the outer peripheral face of snakelike liquid cooling pipe and cylindrical electric core all contacts, and the contact area of snakelike liquid cooling pipe and every cylindrical electric core is limited, leads to the radiating effect not ideal.
The Chinese patent with the patent number of CN106711547A discloses a heat management device and a power supply device, which are used for carrying out heat dissipation management on a single battery by adopting double heat dissipation guarantee, firstly absorbing heat emitted by the single battery in a power battery module through a liquid cooling flat tube, secondly transmitting at least part of residual heat which is not absorbed by the liquid cooling flat tube to the liquid cooling flat tube through a heat conduction sleeve sleeved on the single battery, and finally taking the heat out of the power battery module together by cooling liquid, thereby improving the heat dissipation efficiency of a cylindrical battery.
The heat dissipation efficiency of the cylindrical battery can be improved to a certain extent, but the liquid cooling flat tube is still wound in the battery module, heat exchange is carried out between the liquid cooling flat tube and the cylindrical battery cell indirectly through the heat conduction sleeve, the contact area of the liquid cooling flat tube and the cylindrical battery cell is limited, although the heat of the area, which is contacted with the cylindrical battery cell, of the liquid cooling flat tube can be timely taken away, the heat generated in the area of the cylindrical battery cell, which is not contacted with the liquid cooling flat tube, is slowly conducted through the heat conduction sleeve in the process of transferring the heat to the liquid cooling flat tube, the heat on the periphery of the cylindrical battery cell cannot be timely taken away, and the problem that the heat dissipation effect of the cylindrical battery module is poor still caused. In addition, the heat conduction sleeve is sleeved on the cylindrical battery core and is matched with the liquid cooling flat tube, so that more heat dissipation components exist in the whole battery module and are connected with the cylindrical battery core, the space utilization rate of the battery module is reduced, and the energy density of the cylindrical battery is reduced.
Disclosure of Invention
In view of this, the invention provides a liquid cooling module for a cylindrical battery, which solves the problem that the existing liquid cooling structure has a limited contact area with a cylindrical battery core, resulting in an unsatisfactory heat dissipation effect.
The technical scheme of the invention is realized as follows:
the invention provides a cylindrical battery liquid cooling module which comprises a battery module, wherein the battery module comprises a plurality of rows of battery cell groups which are stacked and arranged, each row of battery cell groups comprises a plurality of cylindrical battery cells, and the battery module further comprises a liquid cooling sleeve connected with the cylindrical battery cells; wherein,,
the liquid cooling sleeve is provided with an installation cavity with an opening at one end, and the cylindrical battery cell is arranged in the installation cavity;
the liquid cooling sleeve is internally provided with a liquid cooling chamber for flowing a heat exchange medium, the liquid cooling chamber surrounds the installation cavity, two side surfaces of the liquid cooling sleeve along the radial direction of the installation cavity are respectively provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively communicated with the liquid cooling chamber;
two adjacent liquid cooling sleeves on the battery cell group are connected with each other through the liquid inlet and the liquid outlet.
Based on the technical scheme, preferably, the cylindrical cells on the two adjacent rows of the cell groups are staggered.
Further, preferably, the liquid cooling sleeve has two first connecting portions and two second connecting portions which are oppositely arranged, the liquid inlet and the liquid outlet are respectively arranged on the two first connecting portions, the liquid cooling sleeves on the battery cell group are connected through the first connecting portions, and the liquid cooling sleeves between the adjacent two rows of battery cell groups are connected through the second connecting portions.
On the basis of the technical scheme, preferably, the second connecting portion comprises a protruding portion and a recessed portion which are matched with each other, the protruding portion is located at the center of the side wall of the liquid cooling jacket, the two recessed portions are symmetrically arranged and located on two sides of the protruding portion respectively, one end of each recessed portion is in arc transition connection with the protruding portion, and the other end of each recessed portion is connected with the first connecting portion.
On the basis of the technical scheme, the first connecting part is a vertical side face, the liquid inlet is arranged on at least one first connecting part along the axis direction of the mounting cavity, a sealing element is arranged on the liquid inlet, and a sealing groove connected with the sealing element is arranged on the liquid outlet.
On the basis of the technical scheme, the battery pack also comprises a liquid inlet assembly and a liquid outlet assembly, wherein the liquid inlet assembly is positioned at one end of the battery module, and the liquid inlet assembly is connected with a liquid inlet on a liquid cooling sleeve at the starting end of each row of the battery cell group in parallel; the liquid outlet assembly is positioned at the other end of the battery module, and the liquid outlet assembly is connected with a liquid outlet on the liquid cooling sleeve at the tail end of each row of the battery cell group in parallel.
Further, preferably, the liquid inlet assembly comprises a liquid inlet plate, a liquid separating plate and a liquid inlet header pipe, wherein the liquid inlet plate is horizontally positioned at one end of the battery module, the liquid separating plates are fixedly arranged in a plurality along the length direction of the liquid inlet plate at equal intervals, a first space for inserting a liquid supply jacket is formed between two adjacent liquid separating plates, first interfaces connected with liquid inlets on the liquid cooling jacket are respectively arranged on the liquid separating plates and the liquid inlet plates corresponding to the first space, liquid inlet chambers which are mutually communicated are respectively arranged in the liquid inlet plate and the liquid separating plate, the liquid inlet chambers are communicated with the first interfaces, and the liquid inlet header pipe is fixedly arranged on the liquid inlet plate and is communicated with the liquid inlet chambers;
the liquid outlet assembly comprises a liquid outlet plate, a bus plate and a liquid outlet header pipe, wherein the liquid outlet plate is horizontally arranged at the other end of the battery module, the bus plates are fixedly arranged at equal intervals along the length direction of the liquid inlet plate, a second space for the liquid supply jacket to be inserted is formed between two adjacent bus plates, second interfaces connected with liquid outlets on the liquid cooling jacket are arranged on the liquid outlet plates corresponding to the bus plates and the second space, liquid outlet cavities communicated with each other are arranged in the liquid outlet plate and the bus plates, the liquid outlet cavities are communicated with the second interfaces, and the liquid outlet header pipe is fixedly arranged on the liquid outlet plate and communicated with the liquid outlet cavities.
On the basis of the technical scheme, the battery module comprises a battery module, and is characterized by further comprising a first fixing plate and a second fixing plate, wherein the first fixing plate is horizontally arranged on the top surface of the battery module, the second fixing plate is horizontally arranged on the bottom surface of the battery module, the first fixing plate is provided with a mounting hole for extending a pole column of a cylindrical battery cell, the top end and the bottom end of the liquid cooling sleeve are respectively provided with a first positioning hole, and the first fixing plate and the second fixing plate are respectively provided with a second positioning hole connected with the first positioning holes.
On the basis of the technical scheme, preferably, an explosion-proof valve is arranged at one end, far away from the pole of the cylindrical battery cell, a through hole corresponding to the explosion-proof valve is arranged on the bottom surface of the liquid cooling sleeve, and a pressure relief hole corresponding to the through hole is arranged on the second fixing plate.
Further, preferably, the battery module further comprises a lower box body, the battery module is arranged in the lower box body, and a pressure relief channel corresponding to the pressure relief hole is formed in the ground in the lower box body.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the cylindrical battery liquid cooling module disclosed by the invention, the liquid cooling sleeves are sleeved on the cylindrical battery cores in the battery module, the liquid cooling chambers are arranged in the liquid cooling sleeves, the liquid cooling chambers encircle the outer peripheral sides of the cylindrical battery cores, and heat exchange media flowing in the liquid cooling chambers can fully contact with the outer surfaces of the cylindrical battery cores, so that the cylindrical battery cores can dissipate heat efficiently; meanwhile, all the cylindrical electric cores on the electric core group are connected with each other through the liquid cooling sleeves, and meanwhile, the liquid cooling sleeves are connected with each other through the liquid inlet and the liquid outlet, and the liquid cooling chambers on the plurality of liquid cooling sleeves on the electric core group are sequentially connected in series, so that the efficient heat dissipation of all the cylindrical electric cores in the whole battery module can be realized;
(2) The cylindrical cells on the adjacent two rows of the cell groups are staggered, so that gaps among the cylindrical cells can be reduced, the space utilization rate of the cylindrical cells is improved, and the energy density of the battery module is further improved;
(3) The second connecting parts are provided with the mutually matched protruding parts and the concave parts, so that the liquid cooling sleeves between two adjacent rows of battery cell groups are mutually attached and connected through the second connecting parts, on one hand, the space utilization rate of the battery module is increased, on the other hand, the liquid cooling sleeves are in seamless connection, so that heat exchange is carried out between the adjacent liquid cooling sleeves, and the liquid cooling effect of the battery module can be further increased;
(4) Through the liquid inlet assembly and the liquid outlet assembly, on one hand, the heat exchange medium can be respectively provided for the multiple rows of electric core components, and on the other hand, the two ends of the battery module can be positioned;
(5) The first positioning holes are formed in the top end and the bottom end of the liquid cooling sleeve, the second positioning holes connected with the first positioning holes are formed in the first fixing plate and the second fixing plate, so that all the cylindrical battery cells can be fixed in groups in the horizontal direction, the cylindrical battery cells are integrally bound and fastened, and the overall structural strength of the battery module is improved;
(6) Through seting up explosion-proof valve in cylinder electricity core bottom surface to set up the through-hole in liquid cooling cover bottom surface, seted up the pressure release hole corresponding with the through-hole on the second fixed plate, set up the pressure release passageway corresponding with the pressure release hole on the lower box body internal ground, can be when cylinder electricity core thermal runaway takes place, release thermal runaway energy through the pressure release passageway on the lower box body, avoid causing the damage to the electrical components of cylinder electricity core top surface.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic plan view of a battery module according to the present disclosure;
FIG. 2 is a schematic diagram of an assembly structure of a cylindrical battery cell and a liquid cooling jacket according to the present disclosure;
FIG. 3 is a schematic view of a front perspective view of a liquid cooling jacket of the present disclosure;
FIG. 4 is a plan cross-sectional view of A-A of a liquid cooling jacket of the present disclosure;
FIG. 5 is an enlarged view of a portion of FIG. 1 at A;
FIG. 6 is an exploded view of a liquid cooling module for a cylindrical battery according to the present disclosure;
FIG. 7 is an enlarged view of a portion of FIG. 6 at B;
FIG. 8 is a schematic view of a bottom perspective structure of a liquid cooling jacket of the present disclosure;
FIG. 9 is a schematic perspective view of a liquid inlet assembly according to the present disclosure;
FIG. 10 is a schematic perspective view of a liquid discharge assembly according to the present disclosure;
FIG. 11 is a schematic diagram of a three-dimensional structure of a liquid cooling module for a cylindrical battery according to the present invention;
reference numerals:
1. a battery module; 10. a cell group; 110. a cylindrical cell; 2. a liquid cooling jacket; 21. a mounting cavity; 22. a liquid cooling chamber; 23. a liquid inlet; 24. a liquid outlet; 25. a first connection portion; 26. a second connecting portion; 261. a boss; 262. a recessed portion; 231. a seal; 241. sealing grooves; 3. a liquid inlet assembly; 4. a liquid outlet assembly; 31. a liquid inlet plate; 32. a liquid separation plate; 33. a liquid inlet main pipe; 300. a first space; 301. a first interface; 41. a liquid outlet plate; 42. a bus plate; 43. a liquid outlet main pipe; 400. a second space; 401. a second interface; 5. a first fixing plate; 6. a second fixing plate; 51. a mounting hole; 27. a first positioning hole; s, a second positioning hole; 1101. an explosion-proof valve; 28. a through hole; 61. a pressure relief hole; 7. and a lower box body.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
As shown in fig. 1, referring to fig. 2-4, the embodiment of the invention discloses a cylindrical battery liquid cooling module, which comprises a battery module 1, wherein the battery module 1 comprises a plurality of rows of battery cell groups 10 which are stacked and arranged, each row of battery cell groups 10 comprises a plurality of cylindrical battery cells 110, and in the embodiment, the cylindrical battery cells 110 in the battery module 1 are vertically arranged.
In the prior art, in order to realize the heat dissipation of the cylindrical battery cells 110 summarized by the battery module 1, a serpentine liquid cooling tube is mostly adopted to attach heat conducting silica gel to the side surfaces of the cylindrical battery cells 110 and is inserted into gaps between the side surfaces of the cylindrical battery cells 110, and the heat dissipation mode cannot ensure that the serpentine liquid cooling tube is in contact with the outer peripheral surfaces of the cylindrical battery cells 110, so that the contact area between the serpentine liquid cooling tube and each cylindrical battery cell 110 is limited, and the heat dissipation effect is not ideal.
In order to solve the above problems, the present embodiment adopts the following technical solutions.
Specifically, the battery module 1 of the present embodiment further includes a liquid cooling jacket 2 connected to the cylindrical battery cell 110.
In this embodiment, referring to fig. 3 and 4, the liquid cooling jacket 2 has a mounting cavity 21 with an opening at one end, the inner diameter of the mounting cavity 21 is adapted to the diameter of the cylindrical battery cell 110, and the cylindrical battery cell 110 is inserted into the mounting cavity 21, so that the outer peripheral surface of the cylindrical battery cell 110 contacts with the inner peripheral surface of the mounting cavity 21, and as some embodiments, the cylindrical battery cell 110 may be tightly fitted with the mounting cavity 21, or clearance fit. The depth of the mounting cavity 21 is adapted to the height of the cylindrical battery cell 110, so that the mounting cavity 21 can completely wrap the outer circumferential surface of the cylindrical battery cell 110.
The liquid cooling chamber 22 for the heat exchange medium to flow is arranged in the liquid cooling sleeve 2, the liquid cooling chamber 22 surrounds the mounting cavity 21, the liquid inlet 23 and the liquid outlet 24 are respectively formed in the two side surfaces of the liquid cooling sleeve 2 along the radial direction of the mounting cavity 21, the liquid inlet 23 and the liquid outlet 24 are respectively communicated with the liquid cooling chamber 22, and therefore, the heat exchange medium is introduced through the liquid inlet 23 and flows into the liquid outlet 24 through the liquid cooling chamber 22 to be reserved, the heat exchange medium in the liquid cooling chamber 22 surrounds the cylindrical battery cell 110, and the heat exchange medium flowing in the liquid cooling chamber 22 can fully contact with the outer surface of the cylindrical battery cell 110, so that high-efficiency heat dissipation of the cylindrical battery cell 110 is realized. It should be noted that the heat exchange medium flows to the liquid cooling chambers 22 at two sides of the central longitudinal section of the installation cavity 21 respectively, so that the flow rate of the heat exchange medium in the liquid cooling chambers 22 at two sides can be ensured to be the same, and uniform heat exchange of the outer peripheral surface of the cylindrical battery cell 110 can be realized.
In this embodiment, the liquid cooling jacket 2 is made of a heat-dissipating metal, preferably aluminum. The heat exchange medium is preferably water, a cooling liquid or other solution which can be cooled.
In order to realize that all the cylindrical battery cells 110 in the battery module 1 can realize high-efficiency heat dissipation, the embodiment connects two adjacent liquid cooling jackets 2 on the battery cell group 10 with each other through the liquid inlet 23 and the liquid outlet 24. From this setting, each cylinder electric core 110 on the electric core group 10 is through liquid cold cover 2 interconnect, simultaneously through inlet 23 and liquid outlet 24 interconnect between the liquid cold cover 2, on the one hand, guaranteed that a plurality of cylinder electric cores 110 on the electric core group 10 are arranged in order along length direction, on the other hand, liquid cooling cavity 22 on a plurality of liquid cold covers 2 on the electric core group 10 are established ties in order to can realize that all cylinder electric cores 110 in whole battery module 1 can obtain high-efficient heat dissipation.
As a preferred embodiment, referring to fig. 5, the cylindrical cells 110 on two adjacent rows of the cell groups 10 are staggered. By the arrangement, the cylindrical battery cells 110 in the battery module 1 adopt the arrangement mode, so that gaps among the cylindrical battery cells 110 can be reduced, the space utilization rate of the cylindrical battery cells 110 is improved, and the energy density of the battery module 1 is further improved.
In this embodiment, the liquid cooling jacket 2 has two first connecting portions 25 and two second connecting portions 26 that are oppositely disposed, it is understood that the outer contour of the liquid cooling jacket 2 has four surfaces, one set of opposite surfaces is defined as the first connecting portions 25, the other set of opposite surfaces is defined as the second connecting portions 26, the liquid inlet 23 and the liquid outlet 24 are respectively disposed on the two first connecting portions 25, the liquid cooling jackets 2 on the electric core set 10 are connected through the first connecting portions 25, specifically, the first connecting portions 25 of the two adjacent liquid cooling jackets 2 on the electric core set 10 are mutually attached, so as to realize connection between the liquid cooling jackets 2. The liquid cooling jackets 2 between two adjacent rows of the battery cell groups 10 are connected through the second connecting parts 26. Specifically, the second connection portions 26 of the liquid cooling jackets 2 facing each other between the adjacent two rows of the cell groups 10 are bonded to each other. From this setting, liquid cooling cover 2 on the electric core group 10 is through first connecting portion 25 interconnect, can avoid having the clearance between the cylinder electric core 110 on the electric core group 10, and liquid cooling cover 2 on the adjacent electric core group 10 is through second connecting portion 26 interconnect, can avoid having the clearance between the cylinder electric core 110 between the electric core group 10, on the one hand, increased battery module 1 space utilization, on the other hand, through the seamless connection between the liquid cooling cover 2, make and carry out heat exchange each other between the adjacent liquid cooling cover 2, can further increase battery module 1's liquid cooling effect.
As some preferred embodiments, referring to fig. 2, the second connecting portion 26 includes a protruding portion 261 and a recessed portion 262 that are matched with each other, the protruding portion 261 is located at the center of the side wall of the liquid cooling jacket 2, two recessed portions 262 are symmetrically disposed on two sides of the protruding portion 261, one end of the recessed portion 262 is in arc transition connection with the protruding portion 261, and the other end of the recessed portion 262 is connected with the first connecting portion 25. In this embodiment, the protruding portion 261 is in a semicircular arc shape, the recessed portion 262 is in a 1/4 arc shape, and the radii of the protruding portion 261 and the recessed portion 262 are the same, so that the liquid cooling jackets 2 on two adjacent rows of the battery cell groups 10 are arranged, when the liquid cooling jackets 2 on one row of the battery cell groups 10 are connected with each other, the protruding portion 261 of the liquid cooling jacket 2 on one row of the battery cell groups 10 can be completely attached to the recessed portion 262 on two adjacent liquid cooling jackets 2 on the other row of the battery cell groups 10, so that the liquid cooling jackets 2 between the multiple rows of the battery cell groups 10 are seamlessly connected, the heat conduction between the liquid cooling jackets 2 can be performed while the gaps between the cylindrical battery cells 110 are avoided, thereby realizing heat complementary heat exchange, and greatly improving the liquid cooling effect in the battery module 1. In addition, it is worth noting that the above structure is provided, so that after the cylindrical battery cells are grouped, the cylindrical battery cells can be kept in a vertical state under the action of the liquid cooling sleeve 2, and compared with a traditional serpentine liquid cooling pipe, the cylindrical battery cells can be prevented from being offset after being grouped.
In addition, compared with the prior art, by sticking the heat-conducting glue on the serpentine radiating pipe and winding the side surfaces of the cylindrical battery cells 110, the liquid-cooled jacket 2 wraps the cylindrical battery cells 110, and all the cylindrical battery cells 110 are connected with each other through the liquid-cooled jacket 2, so that on one hand, the use of radiating components is reduced, on the other hand, the radiating efficiency of the battery module 1 is improved, on the other hand, no gap exists between the cylindrical battery cells 110, and the energy density of the battery module 1 is greatly improved.
As some preferred embodiments, the first connecting portion 25 is a vertical side, so that connection between two adjacent liquid cooling jackets 2 on the battery cell group 10 is facilitated, and at least one liquid inlet 23 is arranged on the first connecting portion 25 along the axial direction of the mounting cavity 21, in this embodiment, two liquid inlets 23 are arranged on the first connecting portion 25 at intervals up and down, so that heat exchange media can be simultaneously introduced into the upper section and the lower section of the liquid cooling cavity 22, thereby ensuring that the upper section and the lower section of the cylindrical battery cell 110 can simultaneously and uniformly obtain heat exchange, and improving heat exchange efficiency.
The liquid inlet 23 is provided with a sealing member 231, and the liquid outlet 24 is provided with a sealing groove 241 connected with the sealing member 231. By adopting the above technical scheme, when two adjacent liquid cooling jackets 2 on the battery cell group 10 are connected through the first connecting portion 25, the liquid cooling jackets 2 are inserted into the liquid outlet 24 through the liquid inlet 23 and are matched with the sealing groove 241 through the sealing piece 231, so that the liquid cooling chamber 22 between the two adjacent liquid cooling jackets 2 is prevented from leaking when heat exchange medium flows.
In order to realize the purpose of introducing heat exchange medium into each liquid cooling jacket 2 in the battery module 1, the embodiment is further provided with a liquid inlet assembly 3 and a liquid outlet assembly 4, and referring to fig. 6, the liquid inlet assembly 3 is positioned at one end of the battery module 1, and the liquid inlet assembly 3 is connected in parallel with the liquid inlets 23 on the liquid cooling jackets 2 at the starting ends of each row of the battery cell groups 10; the liquid outlet assembly 4 is positioned at the other end of the battery module 1, and the liquid outlet assembly 4 is connected with the liquid outlet 24 on the liquid cooling sleeve 2 at the tail end of each row of the battery cell groups 10 in parallel. Through the arrangement of the liquid inlet assembly 3 and the liquid outlet assembly 4, heat exchange media can be respectively provided for the multiple rows of the battery cell groups 10, and the uniform heat dissipation of the cylindrical battery cells 110 among the multiple rows of the battery cell groups 10 is ensured.
As some preferred embodiments, referring to fig. 9 and 10, the liquid inlet assembly 3 of this embodiment includes a liquid inlet plate 31, a liquid separating plate 32 and a liquid inlet manifold 33, the liquid inlet plate 31 is horizontally located at one end of the battery module 1, the liquid separating plate 32 is fixedly arranged in a plurality along the length direction of the liquid inlet plate 31, a first space 300 for inserting the liquid cooling jacket 2 is formed between two adjacent liquid separating plates 32, so that the end of a row of battery cells 10 in the battery module 1 is inserted into the first space 300 and connected with the liquid inlet plate 31, the end of the adjacent battery cells 10 is connected with the liquid separating plate 32, the liquid inlet plates 31 corresponding to the liquid separating plate 32 and the first space 300 are respectively provided with a first interface 301 connected with the liquid inlet 23 on the liquid cooling jacket 2, the liquid inlet plate 31 and the liquid separating plate 32 are respectively internally provided with liquid inlet chambers which are mutually communicated, and the liquid inlet manifold 33 is fixedly arranged on the liquid inlet plate 31 and is communicated with the liquid inlet chambers.
By adopting the above technical scheme, the heat exchange medium can be introduced into the liquid inlet chamber of the liquid inlet plate 31 through the liquid inlet header pipe 33 and is respectively connected with the liquid inlet 23 on the liquid cooling sleeve 2 at the starting end of the electric core group 10 through the first interface 301, so that the heat exchange medium is introduced into the liquid cooling sleeves 2 at the starting end of each electric core group 10, and sequentially flows through the liquid cooling chambers 22 on the liquid cooling sleeves 2, so that all the liquid cooling sleeves 2 of the electric core group 10 are sequentially filled with the heat exchange medium, and all the cylindrical electric cores 110 on the electric core group 10 are subjected to heat exchange cooling.
In order to circularly introduce the heat exchange medium, the liquid outlet assembly 4 comprises a liquid outlet plate 41, a bus plate 42 and a liquid outlet header pipe 43, wherein the liquid outlet plate 41 is horizontally positioned at the other end of the battery module 1, the bus plate 42 is fixedly arranged in a plurality along the length direction of the liquid inlet plate 31 at equal intervals, a second space 400 for inserting the liquid cooling jacket 2 is formed between two adjacent bus plates 42, and therefore, the tail end of a row of battery cell groups 10 in the battery module 1 is inserted into the second space 400 and connected with the liquid outlet plate 41, and the tail end of the battery cell group 10 adjacent to the liquid outlet plate is connected with the bus plate 42. The liquid outlet plates 41 corresponding to the bus plate 42 and the second space 400 are respectively provided with a second interface 401 connected with the liquid outlet 24 on the liquid cooling sleeve 2, liquid outlet cavities which are mutually communicated are arranged in the liquid outlet plates 41 and the bus plate 42, the liquid outlet cavities are communicated with the second interface 401, and a liquid outlet main pipe is fixedly arranged on the liquid outlet plates 41 and communicated with the liquid outlet cavities.
By adopting the technical scheme, the heat exchange medium in the liquid cooling sleeve 2 on the battery cell group 10 flows into the bus plate 42 and the liquid outlet plate 41 through the second interface 401 and is discharged through the liquid outlet main pipe, so that the heat exchange medium circularly flows, and continuous heat dissipation and cooling of the battery module 1 are realized.
It is worth noting that, through the equidistant fixed setting of dividing the liquid board 32 along liquid board 31 length direction a plurality of, the equidistant fixed setting of busbar 42 along liquid board 31 length direction a plurality of, can fix a position multirow electric core group 10 in the width direction, avoid electric core group 10 to take place the displacement in the width direction, guarantee battery module 1 at horizontal direction stable in structure.
Although the liquid inlet assembly 3 and the liquid outlet assembly 4 at two ends of the battery module 1 can horizontally position the battery module 1 to a certain extent, the cylindrical battery cell 110 still has a problem of horizontal offset. Referring to fig. 6 and 7, for this purpose, the present embodiment further provides a first fixing plate 5 and a second fixing plate 6, where the first fixing plate 5 is horizontally located on the top surface of the battery module 1, the second fixing plate 6 is horizontally located on the bottom surface of the battery module 1, the first fixing plate 5 is provided with a mounting hole 51 for extending the pole of the cylindrical battery cell 110, the top end and the bottom end of the liquid cooling jacket 2 are provided with first positioning holes 27, and the first fixing plate 5 and the second fixing plate 6 are provided with second positioning holes S connected with the first positioning holes 27. From this setting, after battery module 1 is in groups, with first fixed plate 5 and second fixed plate 6 level setting respectively in battery module 1 top and bottom, can carry out the bolt-up with the first locating hole 27 on the liquid cooling cover 2 through the second locating hole S on first fixed plate 5 and the second fixed plate 6, perhaps connect through the locating pin to the realization can be realized making groups to all cylinder electric core 110 fixed in the horizontal direction, makes wholly bind the fastening between cylinder electric core 110 and the cylinder electric core 110, improves battery module 1' S overall structure intensity.
In this embodiment, the opening of the liquid cooling jacket 2 is upward, so after the cylindrical battery cell 110 is inserted into the liquid cooling jacket 2, the post of the cylindrical battery cell 110 is upward, after the battery module 1 is fixed in groups, the post of the cylindrical battery cell 110 needs to be connected in series and parallel through the point connection assembly, because the cylindrical battery module 1 belongs to a high-density power battery, the cylindrical battery may have thermal runaway condition when being charged and discharged, in order to enable the cylindrical battery cell 110 to release the thermal runaway in time, referring to fig. 8, in this embodiment, an explosion-proof valve 1101 is provided at one end of the cylindrical battery cell 110 far away from the post, a through hole 28 corresponding to the explosion-proof valve 1101 is provided at the bottom surface of the liquid cooling jacket 2, and a pressure release hole 61 corresponding to the through hole 28 is provided on the second fixing plate 6. By arranging the explosion-proof valve 1101 on the bottom surface of the cylindrical battery, when thermal runaway occurs, the energy in the cylindrical battery cell 110 breaks through the explosion-proof valve 1101 and is discharged from the through hole 28 on the bottom surface of the liquid cooling sleeve 2 and the pressure relief hole 61 on the second fixing plate 6, so that damage to the point connection assembly on the top surface of the battery module 1 is avoided.
In order to fix the battery modules 1 in groups, the embodiment further provides a lower box 7, referring to fig. 11, the battery modules 1 are disposed in the lower box 7, a pressure release channel (not shown in the figure) corresponding to the pressure release hole 61 is provided on the ground in the lower box 7, and when the thermal runaway of the cylindrical battery cell 110 occurs, the thermal runaway energy is released through the pressure release channel on the lower box 7, so as to avoid damaging electrical components on the top surface of the cylindrical battery cell 110.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. The utility model provides a cylinder battery liquid cooling module, its includes battery module (1), battery module (1) include electric core group (10) of multirow range upon range of arrangement, and every electric core group (10) include several cylinder electric core (110), its characterized in that: the battery module (1) further comprises a liquid cooling sleeve (2) connected with the cylindrical battery cell (110); wherein,,
the liquid cooling sleeve (2) is provided with a mounting cavity (21) with an opening at one end, and the cylindrical battery cell (110) is arranged in the mounting cavity (21);
the liquid cooling sleeve (2) is internally provided with a liquid cooling chamber (22) for flowing of a heat exchange medium, the liquid cooling chamber (22) surrounds the installation cavity (21), two side surfaces of the liquid cooling sleeve (2) along the radial direction of the installation cavity (21) are respectively provided with a liquid inlet (23) and a liquid outlet (24), and the liquid inlet (23) and the liquid outlet (24) are respectively communicated with the liquid cooling chamber (22);
two adjacent liquid cooling sleeves (2) on the battery cell group (10) are connected with each other through the liquid inlet (23) and the liquid outlet (24);
cylindrical cells (110) on two adjacent rows of the cell groups (10) are staggered;
the liquid cooling sleeve (2) is provided with two first connecting parts (25) and two second connecting parts (26) which are oppositely arranged, the liquid inlet (23) and the liquid outlet (24) are respectively arranged on the two first connecting parts (25), the liquid cooling sleeves (2) on the battery cell groups (10) are connected through the first connecting parts (25), and the liquid cooling sleeves (2) between two adjacent rows of the battery cell groups (10) are connected through the second connecting parts (26);
the first connecting part (25) is a vertical side surface, the liquid inlet (23) is at least arranged on the first connecting part (25) along the axial direction of the mounting cavity (21), a sealing element (231) is arranged on the liquid inlet (23), and a sealing groove (241) connected with the sealing element (231) is arranged on the liquid outlet (24);
the battery pack also comprises a liquid inlet assembly (3) and a liquid outlet assembly (4), wherein the liquid inlet assembly (3) is positioned at one end of the battery module (1), and the liquid inlet assembly (3) is connected with liquid inlets (23) on the liquid cooling sleeves (2) at the starting end of each row of the battery cell groups (10) in parallel; the liquid outlet assembly (4) is positioned at the other end of the battery module (1), and the liquid outlet assembly (4) is connected with a liquid outlet (24) on the liquid cooling sleeve (2) at the tail end of each row of the battery cell group (10) in parallel;
the liquid inlet assembly (3) comprises a liquid inlet plate (31), a liquid separation plate (32) and a liquid inlet header pipe (33), wherein the liquid inlet plate (31) is horizontally positioned at one end of the battery module (1), the liquid separation plates (32) are fixedly arranged at equal intervals along the length direction of the liquid inlet plate (31), a first space (300) for inserting a liquid cooling jacket (2) is formed between two adjacent liquid separation plates (32), first interfaces (301) connected with liquid inlets (23) on the liquid cooling jacket (2) are respectively arranged on the liquid inlet plate (31) corresponding to the liquid separation plates (32), liquid inlet chambers which are mutually communicated are respectively arranged in the liquid inlet plate (31) and the liquid separation plates (32), the liquid inlet chambers are communicated with the first interfaces (301), and the liquid inlet header pipe (33) is fixedly arranged on the liquid inlet plate (31) and is communicated with the liquid inlet chambers;
the utility model provides a liquid assembly (4) is including play liquid board (41), busbar board (42) and play liquid house steward (43), play liquid board (41) level is located the battery module (1) other end, busbar board (42) are along equidistant fixed setting a plurality of feed liquor board (31) length direction, are formed with between two adjacent busbar boards (42) and supply liquid cold jacket (2) male second space (400), all be provided with on play liquid board (41) that busbar board (42) and second space (400) correspond and go out liquid interface (401) that liquid outlet (24) are connected on liquid cooling jacket (2), be provided with the play liquid cavity of mutual intercommunication in play liquid board (41) and the busbar board (42), play liquid cavity is linked together with second interface (401), play liquid house steward (43) are fixed to be set up on play liquid board (41) and are linked together with play liquid cavity.
2. The cylindrical battery liquid cooling module according to claim 1, wherein: the second connecting portion (26) comprises protruding portions (261) and recessed portions (262) which are matched with each other, the protruding portions (261) are located in the center of the side wall of the liquid cooling jacket (2), the recessed portions (262) are symmetrically arranged in two, the protruding portions (261) are located on two sides of the protruding portions respectively, one ends of the recessed portions (262) are in arc transition connection with the protruding portions (261), and the other ends of the recessed portions (262) are connected with the first connecting portion (25).
3. The cylindrical battery liquid cooling module according to claim 1, wherein: still include first fixed plate (5) and second fixed plate (6), first fixed plate (5) level is located battery module (1) top surface, second fixed plate (6) level is located the bottom surface of battery module (1), set up mounting hole (51) that supply the utmost point post of cylinder electricity core (110) to stretch out on first fixed plate (5), first locating hole (27) have all been seted up on liquid cooling cover (2) top and bottom, second locating hole (S) that are connected with first locating hole (27) have all been seted up on first fixed plate (5) and the second fixed plate (6).
4. A cylindrical battery liquid cooling module as claimed in claim 3, wherein: an explosion-proof valve (1101) is arranged at one end, far away from the polar column, of the cylindrical battery cell (110), a through hole (28) corresponding to the explosion-proof valve (1101) is arranged on the bottom surface of the liquid cooling sleeve (2), and a pressure relief hole (61) corresponding to the through hole (28) is arranged on the second fixing plate (6).
5. The cylindrical battery liquid cooling module according to claim 4, wherein: the battery module (1) is arranged in the lower box body (7), and a pressure relief channel corresponding to the pressure relief hole (61) is formed in the ground in the lower box body (7).
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| CN202211492542.6A CN115764066B (en) | 2022-11-25 | 2022-11-25 | Cylindrical battery liquid cooling module |
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| CN202211492542.6A CN115764066B (en) | 2022-11-25 | 2022-11-25 | Cylindrical battery liquid cooling module |
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| CN115764066B true CN115764066B (en) | 2023-10-10 |
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| CN106654440A (en) * | 2016-10-18 | 2017-05-10 | 华霆（合肥）动力技术有限公司 | Cell cooling device and power supply device |
| CN110739502A (en) * | 2019-09-08 | 2020-01-31 | 南京金龙新能源汽车研究院有限公司 | thin-wall cavity liquid cooling structure battery module |
| CN112652846A (en) * | 2021-01-19 | 2021-04-13 | 中国第一汽车股份有限公司 | Battery core, battery assembly and automobile |
| CN114824574A (en) * | 2022-06-15 | 2022-07-29 | 重庆交通大学 | Large-size cylindrical lithium battery pack |
| CN217589107U (en) * | 2022-04-25 | 2022-10-14 | 广州小鹏汽车科技有限公司 | Battery core cooling structure, battery core module and power battery pack |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654440A (en) * | 2016-10-18 | 2017-05-10 | 华霆（合肥）动力技术有限公司 | Cell cooling device and power supply device |
| CN110739502A (en) * | 2019-09-08 | 2020-01-31 | 南京金龙新能源汽车研究院有限公司 | thin-wall cavity liquid cooling structure battery module |
| CN112652846A (en) * | 2021-01-19 | 2021-04-13 | 中国第一汽车股份有限公司 | Battery core, battery assembly and automobile |
| WO2022156700A1 (en) * | 2021-01-19 | 2022-07-28 | 中国第一汽车股份有限公司 | Battery cell, battery assembly, and automobile |
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| CN114824574A (en) * | 2022-06-15 | 2022-07-29 | 重庆交通大学 | Large-size cylindrical lithium battery pack |
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