CN219144347U - High-capacity battery shell and high-capacity battery - Google Patents
High-capacity battery shell and high-capacity battery Download PDFInfo
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- CN219144347U CN219144347U CN202223068420.2U CN202223068420U CN219144347U CN 219144347 U CN219144347 U CN 219144347U CN 202223068420 U CN202223068420 U CN 202223068420U CN 219144347 U CN219144347 U CN 219144347U
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- 238000001816 cooling Methods 0.000 claims abstract description 183
- 239000007788 liquid Substances 0.000 claims abstract description 155
- 238000005192 partition Methods 0.000 claims abstract description 57
- 238000000926 separation method Methods 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 230000007423 decrease Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 239000000110 cooling liquid Substances 0.000 description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a high-capacity battery shell and a high-capacity battery, which mainly solve the problems of complex structure and complicated assembly and disassembly of the cooling device of the traditional battery. The high-capacity battery shell comprises a battery upper cover, a battery lower cover and a battery box body; the battery upper cover and the battery lower cover are arranged at the open ends of the two sides of the battery box body in a sealing and insulating way, and are respectively a positive pole column and a negative pole column of the high-capacity battery; n separation plates are arranged in the battery box body, and divide the inner cavity of the battery box body into a plurality of battery core accommodating bins; at least one first liquid cooling channel is arranged on at least one partition plate, and an inlet and an outlet of the first liquid cooling channel are positioned on the same side wall or different side walls of the battery box body. The first liquid cooling channel is arranged on the high-capacity battery shell, so that the structure in the high-capacity battery shell is relatively simple, and the installation and disassembly processes of each liquid cooling assembly can be omitted.
Description
Technical Field
The utility model belongs to the field of batteries, and particularly relates to a high-capacity battery shell and a high-capacity battery.
Background
The application field of the lithium ion battery is very wide, and the lithium ion battery can be applied to the fields of energy storage, power batteries and the like. With the further development of lithium ion batteries in recent years, the safe use of lithium ion batteries has also been attracting attention. Because the principle and the structural characteristic of lithium ion battery can produce great heat in charge and discharge process, the heat can increase gradually in addition, if the heat of production can not effectively release, the heat will accumulate in single battery, causes battery temperature inhomogeneous to reduce battery life, the heat balance of battery can be destroyed when serious, causes a series of self-heating side reaction, causes the incident of battery.
To avoid thermal runaway as much as possible, the heat generated by the battery needs to be treated in time. For example, chinese patent CN110890494B discloses a battery module and a battery box with a liquid cooling device, where the battery module and the battery box with the liquid cooling device include a casing, a plurality of electric cores and a liquid cooling device, the electric cores are sequentially and transversely arranged in the casing, the liquid cooling device includes a liquid inlet pipeline, a liquid return pipeline and a plurality of liquid cooling plates arranged on the casing, the liquid cooling plates are arranged between two adjacent electric cores, and a main liquid inlet flow channel is arranged in the liquid cooling plates. In the liquid cooling structure, the liquid cooling plate is tightly attached to the battery cell, so that each part of the battery cell can uniformly dissipate heat, the temperature consistency of the battery cell is good, the reliability of the battery cell in use is improved, and the service life of the battery cell is prolonged. In the battery module, the liquid cooling device realizes cooling of the battery module through the combination of a plurality of parts such as a liquid inlet pipeline, a liquid return pipeline, a plurality of liquid cooling plates and the like.
Chinese patent CN114566771a discloses a high-capacity battery, which comprises a casing, a battery cell group disposed in the casing, and cover plates disposed on two opposite sides of the casing, wherein the cover plates are the positive and negative electrodes of the battery. The battery cell group is formed by connecting a plurality of battery cells which are grouped according to capacity, voltage, internal resistance, self-discharge and the like and have similar performances in parallel. The lug of electric core group is connected with the apron, and the apron is insulating with the casing, sealing connection. The cover plate is used as the pole, so that the material can be saved, the energy density of the battery can be increased, the heat dissipation effect of the battery can be improved, the conductive area between two batteries can be increased when the batteries are connected in series, and the energy density and the safety of the battery can be improved. This casing and apron of large capacity battery form a confined cavity, if set up the liquid cooling device in the above-mentioned battery module in the box, then make the structure in the box comparatively complicated, simultaneously, the setting of liquid cooling board and liquid cooling pipe for the installation and the dismantlement of whole large capacity battery are comparatively loaded down with trivial details.
Disclosure of Invention
The utility model provides a high-capacity battery shell and a high-capacity battery, which are used for solving the problems that the existing battery cooling device is complex in structure and complicated in installation and disassembly.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model provides a high-capacity battery shell, which comprises a battery upper cover, a battery lower cover and a battery box body; the battery upper cover and the battery lower cover are arranged at the open ends of the two sides of the battery box body in a sealing and insulating manner, and are respectively a positive pole column and a negative pole column of the high-capacity battery; n separation plates are arranged in the battery box body, the N separation plates divide the inner cavity of the battery box body into a plurality of battery cell accommodating bins for accommodating battery cells, and N is an integer greater than or equal to 1; at least one first liquid cooling channel is arranged on at least one partition plate, and an inlet and an outlet of the first liquid cooling channel are positioned on the same side wall or different side walls of the battery box body.
Due to the first
The temperature near each separator is the highest point of the temperature of the entire large-capacity battery, so the following settings are made: first->
The area of the flow cross section of the first liquid cooling channel on each partition plate is larger than that of the first liquid cooling channels on other partition plates, and the arrangement can timely treat heat at the highest temperature position in the battery box body, so that the influence of heat concentration on the normal operation of a high-capacity battery is avoided; wherein (1)>
Representing an upward rounding.
Further, the N separation plates are respectively provided with a first liquid cooling channel, and the first liquid cooling channel
The flow cross-section area of the first liquid cooling channel on each partition plate gradually decreases from the flow cross-section area of the first liquid cooling channel on the 1 st partition plate and the flow cross-section area of the first liquid cooling channel on the N th partition plate, and specifically, the method can be realized by adopting the following technical means, the 1 st part>
The number of the first liquid cooling channels on each partition plate is gradually reduced from the number of the first liquid cooling channels on the 1 st partition plate to the number of the first liquid cooling channels on the N th partition plate. Through the reasonable layout of the first liquid cooling channels on the N separation plates in the above mode, the layout can not only conduct targeted treatment on the heat in the whole battery box body and ensure that the temperature consistency of each position of the battery box body is better, but also reduce the arrangement of the first liquid cooling channels on the premise of ensuring cooling,thereby simplifying the structure of the battery case and reducing costs.
For making the integrated level higher, the cooling is more abundant, be provided with at least one second liquid cooling passageway on a lateral wall of battery box or two lateral walls that set up relatively, second liquid cooling passageway and the first liquid cooling passageway on the division board establish ties and form the cooling passageway, perhaps second liquid cooling passageway and the parallelly connected cooling passageway that forms of first liquid cooling passageway on the division board for hold a plurality of battery electric cores in the storehouse to the electric core and cool off.
For the speed that makes the coolant liquid pass through improves, guarantees the relative uniformity of cooling temperature around the battery box simultaneously, all be provided with the second liquid cooling passageway on the relative both sides wall of battery box, the import of all first liquid cooling passageways all communicates with the second liquid cooling passageway on one lateral wall, and the export all communicates with the second liquid cooling passageway on the relative another lateral wall to form parallelly connected cooling passageway. Compared with the cooling channels connected in series, the cooling channels connected in parallel not only can enable the cooling liquid to pass through the battery box body more quickly and cool in time, but also can avoid the influence of the cooling liquid which is subjected to heat exchange and has the temperature rising on the subsequent cooling.
The second liquid cooling channel can be formed in the side wall of the battery box body through casting, 3D printing or other mechanical processing methods, preferably, the second liquid cooling channel is formed by a cooling groove arranged on the side wall of the battery box body and a sealing cover plate for sealing the cooling groove, and the mode enables the processing and the manufacturing of the battery box body to be simple, and the processing can be completed by adopting a conventional processing mode, so that the cost is lower.
Further, the cross section of the cooling groove is set to be arc-shaped, semicircular or runway-shaped, and the inner wall of the cooling groove is set to be a smooth curved surface, so that local loss and edge loss of cooling liquid during passing are reduced, the flow resistance of the cooling liquid during passing is reduced, the flow speed is improved, the cooling efficiency is improved, the energy consumption is effectively reduced, and the economic benefit is further obtained.
The height of division board is less than the height of battery box for a plurality of electric cores that are separated hold the storehouse and communicate each other, and a plurality of electric cores after the intercommunication hold the pressure in the storehouse the same, also make a plurality of battery electric cores can share electrolyte system behind the casing opening, simultaneously, N division boards parallel and equidistance set up for a plurality of electric cores hold the storehouse volume the same, and at this moment, this kind of setting is convenient for modularization's installation and dismantlement.
The utility model also provides a high-capacity battery, which comprises a plurality of battery cells and the high-capacity battery shell; at least one battery cell is arranged in each cell accommodating bin, and the positive electrode lug and the negative electrode lug of each battery cell are respectively and electrically connected with the battery upper cover and the battery lower cover through the conductive connecting device.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
the first liquid cooling channel is arranged on the partition plate of the high-capacity battery shell, so that the high-capacity battery shell can realize liquid cooling through the battery box body, a plurality of liquid cooling components are prevented from being adopted in the battery box body, the number of parts in the battery shell is further reduced, the structure of the high-capacity battery is simplified, the weight of the high-capacity battery is reduced, and the cost is reduced. Meanwhile, the liquid cooling channel and the high-capacity battery shell are integrally arranged, and the installation and disassembly processes of the high-capacity battery can be omitted and simplified.
The liquid cooling channel on the high-capacity battery shell can timely and effectively treat heat generated by the battery cell, the cooling effect is higher, the high-capacity battery can be ensured to work in a better temperature range, and the safety accident of the high-capacity battery is avoided.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
In order to more clearly illustrate the embodiments of the utility model 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 utility model, 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 view of a high-capacity battery case according to embodiment 1 of the present utility model;
fig. 2 is a schematic diagram of a high-capacity battery case according to embodiment 1 of the present utility model;
fig. 3 is a second schematic structural view of the high-capacity battery case according to embodiment 1 of the present utility model;
fig. 4 is a schematic temperature diagram of a large-capacity battery in example 2 of the present utility model;
fig. 5 is a schematic structural view of a high-capacity battery case according to embodiment 2 of the present utility model;
fig. 6 is a schematic diagram showing the structure of a high-capacity battery case according to embodiment 3 of the present utility model;
fig. 7 is a second schematic structural view of the high-capacity battery case according to embodiment 3 of the present utility model;
FIG. 8 is a schematic diagram of a first liquid cooling channel and a second liquid cooling channel connected in series in embodiment 3 of the present utility model;
fig. 9 is a schematic structural view of a large-capacity battery in embodiment 4 of the present utility model.
Reference numerals: the battery comprises a 1-battery box body, a 2-battery upper cover, a 3-battery lower cover, a 4-battery cell, a 5-partition plate, a 6-first liquid cooling channel, a 7-second liquid cooling channel, an 11-first side wall, a 12-second side wall, a 71-cooling groove and a 72-sealing cover plate.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the detailed description. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.
Example 1
As shown in fig. 1 to 3 and 9, the large-capacity battery case in the present embodiment includes a battery upper cover 2, a battery lower cover 3, and a battery case 1; the battery box body 1 is formed by surrounding four side walls and is of a structure with an upper opening and a lower opening; the battery upper cover 2 and the battery lower cover 3 are arranged at the open ends of two sides of the battery box body 1, the battery upper cover 2 and the battery lower cover 3 are respectively a positive pole column and a negative pole column of the high-capacity battery, and the battery upper cover 2 and the battery lower cover 3 are in insulating sealing connection with the battery box body 1. Be provided with 5 division boards 5 in the battery box 1, separate the inner chamber of battery box 1 into 6 electric core holding cabins of placing battery electric core, the height of this division board 5 is less than the height of battery box 1 for a plurality of electric core holding cabins that are separated communicate each other, and the pressure in the storage cabin is held to a plurality of electric cores after the intercommunication is the same, also can pour into electrolyte in the high-capacity battery casing after the casing opening of a plurality of battery electric core 4 into, makes a plurality of battery electric core common electrolyte system.
As shown in fig. 3, the above 5 partition boards 5 are all provided with first liquid cooling channels 6, the inlets of the first liquid cooling channels 6 on all partition boards 5 are located on the first side wall 11 of the battery box 1, the outlets are located on the second side wall 12 of the battery box 1, the first side wall 11 and the second side wall 12 are two side walls of the battery box 1 which are oppositely arranged, at this time, the first side wall 11 and the second side wall 12 are all provided with second liquid cooling channels 7, the inlets of all the first liquid cooling channels 6 are all communicated with the second liquid cooling channels 7 located on the first side wall 11, and the outlets of all the first liquid cooling channels 6 are all communicated with the second liquid cooling channels 7 located on the second side wall 12, so as to form parallel cooling channels.
The second liquid cooling channel 7 may be formed by casting, 3D printing or other machining methods, preferably, the liquid cooling channel is formed by a cooling groove 71 formed on the side wall of the battery box 1 and a sealing cover plate 72 sealing the cooling groove 71, which makes the processing and manufacturing of the battery box 1 simple, and the processing can be completed by adopting a conventional processing method, so that the cost is low. Meanwhile, the first side wall 11 is provided with a liquid inlet communicated with the cooling groove 71, the second side wall 12 is provided with a liquid outlet communicated with the cooling groove 71, preferably, the shape of the sealing cover plate 72 is matched with that of the cooling groove 71, the surface of the sealing cover plate 72 for sealing the liquid cooling channel is a plane, reliable sealing of the liquid cooling channel is realized, the length of the second liquid cooling channel 7 can be set to be 85% -90% of the lengths of the first side wall and the second side wall, and the area of the cooling flow passage flowing through is enlarged as much as possible, so that heat generated by a battery cell can be taken away quickly and effectively.
The cross section of the cooling groove 71 in this embodiment is arc-shaped, semicircular or racetrack, the inner wall of the cooling groove 71 is set to be a smooth curved surface, so that the local loss and the edge loss of the cooling liquid during passing are reduced, the flow resistance of the cooling liquid during passing is small, the flow speed is improved, the cooling efficiency is improved, and the energy consumption is effectively reduced.
For the convenience to realize being connected with outside liquid cooling device fast, can be provided with the feed liquor pipe in the feed liquor mouth department of first lateral wall 11, the leakage fluid mouth department of second lateral wall 12 is provided with the leakage fluid pipe, and feed liquor pipe and leakage fluid pipe can set up in the same side of battery box 1, make things convenient for the arrangement and the installation of outside liquid cooling device. In addition, valves can be arranged on the liquid inlet pipe and the liquid outlet pipe, so that the cooling liquid of a single large-capacity battery can be conveniently controlled.
Of course, the liquid inlet and the liquid outlet of the first liquid cooling passage 6 may be directly connected to the liquid cooling device through a pipe to cool the large-capacity battery case without providing the second liquid cooling passage 7.
Example 2
In this embodiment, the first liquid cooling channels 6 are respectively disposed on the 5 separation plates 5, the 5 separation plates 5 divide the battery box into 6 battery accommodating cavities, that is, into 6 blocks, as shown in fig. 4 and table 1, and when the battery cells in the battery box normally work, the temperatures of the respective parts are different, especially, the temperatures near the 3 rd separation plate 5 are highest, the temperatures near the 2 nd separation plate 5 and the 4 th separation plate 5 are the next lowest, and the temperatures near the 1 st separation plate 5 and the 5 th separation plate 5 are relatively lowest, as shown in table 1, based on this, in the embodiment, the flow cross-sectional area of the first liquid cooling channel 6 on the 3 rd separation plate 5 is set to be larger than the flow cross-sectional area of the first liquid cooling channel 6 on the other separation plates 5, specifically, the flow cross-sectional area of the first liquid cooling channel 6 gradually decreases from the 3 rd separation plate to the 1 st separation plate, at this time, the flow cross-sectional area of the first liquid cooling channel 6 on the 3 rd separation plate 5 is larger than the flow cross-sectional area of the first liquid cooling channel 6 on the first separation plate 5 by the first separation plate 1, and the flow cross-sectional area of the first liquid cooling channel 6 on the 3 th separation plate 5 is larger than the first cross-sectional area of the first liquid cooling channel 6 on the first separation plate 5. The above-mentioned preferred embodiments can be achieved by enlarging the flow area of a single first liquid cooling channel 6 or increasing the number of first liquid cooling channels 6, as shown in fig. 5, the number of first liquid cooling channels 6 on the 3 rd partition plate 5 is 5, the number of first liquid cooling channels 6 on the 2 nd partition plate 5 and the 4 th partition plate 5 is 3, and the number of first liquid cooling channels 6 on the 1 st and 5 th partition plates 5 is 2.
In this embodiment, the outer stiffening ribs are disposed on the outer surface of the side wall of the battery box 1, where the liquid cooling channel is not disposed, and the inner stiffening ribs are disposed on the inner surface of the side wall of the battery box 1, so as to increase the bearing capacity of the high-capacity battery case. The sealing cover plate 72 is integrally connected with the high-capacity battery case: friction welding is preferred, other means being gluing, interference fit, etc.
TABLE 1 actual measurement of temperature at the center of cell between respective separators when liquid cooling is not being performed
Example 3
As shown in fig. 6 to 8, the large-capacity battery case in the present embodiment includes a battery upper cover 2, a battery lower cover 3, and a battery case 1; the battery upper cover 2 and the battery lower cover 3 are arranged at the open ends of the two sides of the battery box body 1 in a sealing and insulating way, and the battery upper cover 2 and the battery lower cover 3 are respectively a positive pole column and a negative pole column of the high-capacity battery; the battery case 1 includes 5 partition plates 5; the 5 partition plates 5 are arranged in the battery box body 1 and divide the inner cavity of the battery box body 1 into 6 battery cell accommodating bins for accommodating battery cells; the height of the partition plate is smaller than that of the battery accommodating cavity, so that the separated cavities are communicated with each other, the pressure in the communicated cavities is the same, and the battery cells can share the electrolyte system after the shell is opened. The first side wall and the second side wall of the battery box 1 are provided with a second liquid cooling channel 7, and the second liquid cooling channel 7 is formed by a cooling groove 71 and a sealing cover plate 72 for sealing the cooling groove 71. The cooling groove 71 has an arc-shaped, semicircular or racetrack cross section.
If only a single first liquid cooling channel 6 is provided on each partition plate 5, the inlets and outlets of the first liquid cooling channels 6 on the adjacent partition plates 5 are staggered, that is, the inlet of the first liquid cooling channel 6 on the 1 st partition plate 5 is located on the first side wall 11, the outlet is located on the second side wall 12, the inlet of the first liquid cooling channel 6 on the 2 nd partition plate 5 is located on the second side wall 12, the outlet is located on the first side wall 11, the inlet of the first liquid cooling channel 6 on the 3 rd partition plate 5 is located on the first side wall 11, the outlet is located on the second side wall 12, the inlet of the first liquid cooling channel 6 on the 4 th partition plate 5 is located on the second side wall 12, the outlet is located on the first side wall 11, and the inlet of the first liquid cooling channel 6 on the 5 th partition plate 5 is located on the first side wall 11, and the outlet is located on the second side wall 12. Meanwhile, a plurality of second liquid cooling channels 7 are respectively arranged on two side walls of the battery box body 1 which are oppositely arranged, namely a plurality of second liquid cooling channels 7 are arranged on the first side wall 11 and the second side wall 12 of the battery box body 1.
At this time, the outlet of the first liquid cooling channel 6 of the 1 st partition plate 5 on the second side wall 12 is communicated with the inlet of the first liquid cooling channel 6 of the 2 nd partition plate 5 through the second liquid cooling channel 7, the outlet of the first liquid cooling channel 6 of the 2 nd partition plate 5 on the first side wall is communicated with the inlet of the first liquid cooling channel 6 of the 3 rd partition plate 5 on the second side wall through the second liquid cooling channel 7, the outlet of the first liquid cooling channel 6 of the 3 rd partition plate 5 on the second side wall is communicated with the inlet of the first liquid cooling channel 6 of the 4 th partition plate 5 through the second liquid cooling channel 7, and the outlet of the first liquid cooling channel 6 of the 4 th partition plate 5 on the first side wall is communicated with the inlet of the first liquid cooling channel 6 of the 5 th partition plate 5 through the second liquid cooling channel 7, so as to form a serial liquid cooling loop, so that the cooling liquid sequentially cools the battery cells 4 in the battery case through the partition plates 5.
If a plurality of first liquid cooling channels 6 are disposed on each partition plate 5, the second liquid cooling channels 7 may connect the plurality of first liquid cooling channels 6 on the single partition plate 5 in series, and then connect the plurality of first liquid cooling channels 6 on the partition plates 5 in series through the second liquid cooling channels 7. For example, as shown in fig. 8, two first liquid cooling passages 6 are provided on each partition plate 5, the first liquid cooling passages 6 on the same partition plate 5 are connected in series by the second liquid cooling passages 7 on the second side wall 12, and then, the first liquid cooling passages 6 on adjacent partition plates 5 are connected in series by the second liquid cooling passages 7 provided on the first side wall 11. By providing a plurality of first liquid cooling passages 6 on a single partition plate 5, heat can be sufficiently handled in the large-capacity battery case 1.
Example 4
As shown in fig. 9, the large-capacity battery provided in this embodiment mainly includes a large-capacity battery case, at least one battery cell 4, and a conductive connection device: the high-capacity battery case in example 1, example 2 or example 3 is mainly formed by enclosing a battery upper cover 2, a battery lower cover 3 and a battery case 1, and the battery upper cover 2 and the battery lower cover 3 are respectively a positive electrode column and a negative electrode column of the high-capacity battery. The positive lug of each battery cell 4 is electrically connected with the upper cover plate (positive plate) through a conductive connecting device, and the negative lug is electrically connected with the lower cover plate (negative plate) through a conductive connecting device, so that the current of a plurality of battery cells 4 is led out through the upper cover plate and the lower cover plate. The conductive connection device may be a conductive connection piece, for example, an aluminum sheet, a copper sheet, or the like. The structure of the battery upper cover 2 and the battery lower cover 3 which are pole columns greatly reduces the material cost of the battery, saves the internal space of the battery and improves the energy density of the battery; when a plurality of batteries are connected in series, the contact area between the polar posts is enlarged, so that the effectiveness of battery connection is improved, the generation of heat is reduced, and the safety and the service life of the batteries are improved.
In this embodiment, insulating gaskets or insulating glue are disposed on the contact surfaces of the battery upper cover 2, the battery lower cover 3 and the battery box 1, so as to insulate the battery upper cover 2, the battery lower cover 3 and the battery box 1.
In the battery charging and discharging process, the battery cell 4 can generate more heat, and the heat can be gradually increased, at this time, because the battery cell is closely placed in the battery shell, the heat can be transferred to the high-capacity battery shell, and then the heat is transferred to the liquid cooling channel, and the heat exchange is carried out with the cooling liquid in the liquid cooling channel, so that the problems of heat concentration and uneven temperature inside the high-capacity battery shell are avoided, the safety accident rate of the battery is reduced, and the service life and the safety of the battery are improved.
Claims (10)
1. The high-capacity battery shell is characterized by comprising a battery upper cover, a battery lower cover and a battery box body;
the battery upper cover and the battery lower cover are arranged at the open ends of the two sides of the battery box body in a sealing and insulating manner, and are respectively a positive pole column and a negative pole column of the high-capacity battery;
n separation plates are arranged in the battery box body, the N separation plates divide the inner cavity of the battery box body into a plurality of battery cell accommodating bins for accommodating battery cells, and N is an integer greater than or equal to 1;
at least one first liquid cooling channel is arranged on at least one partition plate, and an inlet and an outlet of the first liquid cooling channel are positioned on the same side wall or different side walls of the battery box body.
2. The high-capacity battery case according to claim 1, wherein the first
The flow cross-sectional area of the first liquid cooling channel on each partition plate is larger than that of the first liquid cooling channels on other partition plates; wherein->
Representing an upward rounding.
3. The high-capacity battery case according to claim 2, wherein the N partition plates are each provided with a first liquid cooling passage, and the N partition plates are each provided with a second liquid cooling passage
The flow cross-sectional area of the first liquid cooling channel on each partition plate gradually decreases from the flow cross-sectional area of the first liquid cooling channel on the 1 st partition plate to the flow cross-sectional area of the first liquid cooling channel on the N th partition plate.
4. The high-capacity battery case according to claim 2, wherein the first
The number of the first liquid cooling channels on each partition plate is gradually reduced from the number of the first liquid cooling channels on the 1 st partition plate to the number of the first liquid cooling channels on the N th partition plate.
5. The high-capacity battery case according to any one of claims 1 to 4, wherein a second liquid cooling channel is provided on one side wall or two side walls arranged opposite to each other of the battery case, and the second liquid cooling channel is connected in series with the first liquid cooling channel on the partition plate to form a cooling channel, or the second liquid cooling channel is connected in parallel with the first liquid cooling channel on the partition plate to form a cooling channel for cooling the plurality of battery cells in the cell accommodating compartment.
6. The high capacity battery housing of claim 5, wherein the battery housing has second liquid cooling channels disposed on opposite side walls thereof, inlets of all first liquid cooling channels being in communication with the second liquid cooling channels on one side wall, and outlets being in communication with the second liquid cooling channels on the opposite side wall, thereby forming parallel cooling channels.
7. The high-capacity battery case as claimed in claim 6, wherein the second liquid cooling passage is formed by a cooling groove provided on a side wall of the battery case and a sealing cover plate sealing the cooling groove, and a shape of the sealing cover plate is matched with a shape of the cooling groove.
8. The high-capacity battery case as claimed in claim 7, wherein the cooling groove has an arc-shaped or semicircular cross section.
9. The high capacity battery housing of claim 8, wherein the separator plate has a height less than a height of the battery case such that the separated plurality of cell receiving compartments communicate with each other, and at the same time, the N separator plates are disposed in parallel and equidistant such that the plurality of cell receiving compartments have the same volume.
10. A high-capacity battery comprising a plurality of battery cells and the high-capacity battery case according to any one of claims 1 to 9; at least one battery cell is arranged in each cell accommodating bin, and the positive electrode lug and the negative electrode lug of each battery cell are respectively and electrically connected with the battery upper cover and the battery lower cover through the conductive connecting device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223068420.2U CN219144347U (en) | 2022-11-19 | 2022-11-19 | High-capacity battery shell and high-capacity battery |
| PCT/CN2022/143710 WO2023125886A1 (en) | 2021-12-31 | 2022-12-30 | High-capacity battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223068420.2U CN219144347U (en) | 2022-11-19 | 2022-11-19 | High-capacity battery shell and high-capacity battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117134034A (en) * | 2023-10-26 | 2023-11-28 | 江苏正力新能电池技术有限公司 | Battery shell, battery pack and electric equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117134034A (en) * | 2023-10-26 | 2023-11-28 | 江苏正力新能电池技术有限公司 | Battery shell, battery pack and electric equipment |
| CN117134034B (en) * | 2023-10-26 | 2024-05-10 | 江苏正力新能电池技术有限公司 | Battery shell, battery pack and electric equipment |
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