CN115832456B - Battery pack and electric automobile - Google Patents
Battery pack and electric automobile Download PDFInfo
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- CN115832456B CN115832456B CN202211396097.3A CN202211396097A CN115832456B CN 115832456 B CN115832456 B CN 115832456B CN 202211396097 A CN202211396097 A CN 202211396097A CN 115832456 B CN115832456 B CN 115832456B
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- 238000001816 cooling Methods 0.000 claims description 52
- 239000011800 void material Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 description 6
- 239000000110 cooling liquid Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 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
- 238000005266 casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 239000000077 insect repellent Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 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 relates to the technical field of batteries, and discloses a battery pack and an electric automobile, wherein the battery pack comprises: the battery comprises a shell, an electric core and a pole column, wherein the shell is provided with at least one spiral channel which is spiral, and each spiral channel spirally extends outwards around the inside Zhou Xiangyou of an axis; the battery cells are arranged in a one-to-one correspondence manner with the spiral channels, are positioned in the spiral channels and extend along the extending directions of the spiral channels, and are provided with a plurality of pairs of lugs distributed along the extending directions of the spirals at the top sides, wherein each pair of lugs comprises a positive lug and a negative lug; the plurality of pole posts are positioned on the top side of the shell and correspond to the plurality of pole lugs one by one, and each pair of pole posts and the pole lugs which correspond to each other are electrically connected. The shell in the battery pack is of an integrated structure, the single battery is of a long battery core design, the single battery can form a module, the shell structure is simplified, the shell weight is reduced, the capacity of the single battery is improved, and the energy density of the battery pack is improved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery pack and an electric automobile.
Background
With the development of battery technology, high power, high energy, high safety and low cost batteries are the targets pursued by those skilled in the battery art. At present, batteries are widely applied, some batteries are required to be different in size, and some batteries are larger in size, for example, electric vehicles, and especially electric vehicles; in the present conventional battery, a plurality of unit cells are generally assembled into a battery module, and the plurality of battery modules are assembled into a battery pack, or the plurality of unit cells are assembled together according to a certain arrangement mode to form a battery pack, for example, a battery pack disclosed in chinese patent 20181011020445. X, and the battery pack is a conventional battery pack formed by arranging a plurality of unit cells. Each battery cell is formed by assembling one electric core by one shell, a plurality of battery cells are combined together, and because the battery pack is relatively large in size and needs overall stability, a plurality of connecting members are required to be connected stably, the current battery pack is relatively complex in structure, the weight of the battery shell and the connecting members for assembling the battery cells still occupies a large part of the weight of the battery pack, a certain influence on the energy density of the battery still exists, and the energy density of the battery is still limited. Therefore, how to increase the energy density of the battery pack is still a subject that current developers need to actively study.
Disclosure of Invention
The invention aims to provide a battery pack and an electric automobile, wherein a shell in the battery pack is of an integrated structure, a single battery is of a long battery core design, the single battery can be formed into a module, the shell structure is simplified, the shell weight is reduced, the capacity of the single battery is improved, and the energy density of the battery pack is improved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a battery pack, comprising:
a housing having a unitary structure, said housing having at least one helical channel therein, each said helical channel extending helically outward about an axis within Zhou Xiangyou;
the battery cells are positioned in the spiral channels and extend along the extending direction of the spiral channels, the top side of each battery cell is opposite to the top wall of the spiral channel, a plurality of pairs of lugs distributed along the extending direction of the spiral are arranged on the top side of each battery cell, and each pair of lugs comprises a positive lug and a negative lug;
the pole posts are located on the top side of the shell and correspond to the pole lugs one by one, and each pair of pole posts and the corresponding pole lugs are electrically connected.
In the battery pack, the cavity for accommodating the battery cell is in a spiral shape and is a spiral channel, the spiral channel extends spirally from inside to outside around an axis, wherein the spiral channel is in a multi-turn spiral structure, at least one spiral channel is spirally wound in a radial direction of a spiral single turn, a structure with a plurality of stacked channels is formed, the plurality of channels are in a multi-turn spiral repeated stacked structure of the same spiral channel, or the plurality of channels are in different spiral channels and are simultaneously in a multi-turn spiral repeated stacked structure, two adjacent channels share one side wall in the radial direction of the spiral single turn, the utilization ratio of the side wall is improved, the weight of the shell can be effectively reduced, the energy density of the battery pack is improved, the shell is in an integrated structure, the spiral channel is directly formed in the shell, the spiral channel extends in a longer length, one end of the battery cell can extend into the other end of the spiral channel, the battery cell is a long battery cell with a longer length, therefore, the single battery capacity of the long battery cell is improved, the single battery cell can be directly assembled into at least one shell module, and at least one shell module is not required to be directly assembled in the integrated structure, the at least one shell is not required to be assembled, and the assembly is further improved; on the other hand, the single battery with the long battery core is favorable for improving the capacity of the battery, thereby being favorable for realizing the design of improving the high energy density of the battery pack. Therefore, the shell in the battery pack has an integrated structure, the single battery has a long battery core design, the single battery can form a module, the shell structure is simplified, the shell weight is reduced, the capacity of the single battery is improved, and the energy density of the battery pack is improved.
Optionally, the tabs on each of the electric cores are uniformly distributed along the spiral extending direction of the electric core, and the positive tabs and the negative tabs are sequentially and alternately arranged along the spiral extending direction of the electric core.
Optionally, the shell comprises two or three spiral channels, the two or three spiral channels are arranged in parallel along the spiral extending direction, and each two adjacent spiral channels share one side wall along the radial direction of a single spiral turn of the spiral channels.
Optionally, a side of the pole facing the spiral channel is provided with a chute extending along the spiral extending direction, the tab corresponding to the pole is connected with a connecting sheet, and the connecting sheet at least partially stretches into the chute and is connected with the side wall of the chute in a matching way.
Optionally, along the radial direction of the spiral single turn of the spiral channel, the cross section of the chute is triangular, one side edge of the triangle is positioned at the bottom of the chute, the angle opposite to the side edge faces the spiral channel, and the part of the connecting sheet extending into the chute forms a triangular connecting part matched with the chute; or,
along the radial direction of the spiral single circle of the spiral channel, the section of the chute is circular, and the part of the connecting sheet extending into the chute forms a circular connecting part matched with the chute.
Optionally, a void is formed at the spiral center of the housing; the battery pack further includes a cooling module including a first cooling portion located in the void, the first cooling portion including a first cooling channel for circulation of a cooling fluid, the first cooling channel being adjacent to a side wall around the void.
Optionally, the cooling module further includes a second cooling channel located at the top side of the housing for circulating the cooling liquid, the second cooling channel being in communication with the first cooling channel, the second cooling channel being disposed spirally extending around the circumference of the axis.
Optionally, two adjacent poles do not overlap along the radial direction of the spiral single turn of the spiral channel.
Optionally, each spiral channel is provided with at least one liquid injection hole; at least one explosion-proof valve is connected with each spiral channel.
Based on the same inventive concept, the invention also provides an electric automobile, which comprises any battery pack provided by the technical scheme.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. Wherein:
fig. 1 is a schematic structural diagram of a housing according to an embodiment of the present invention;
FIG. 2 is a schematic view of the top side of a housing according to an embodiment of the present invention;
FIG. 3 is a schematic view of a part of a radial cross section of a spiral single turn of a housing according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a battery cell according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a pole according to an embodiment of the present invention.
Icon: 1-a housing; 2-an electric core; 3-pole; 4-a cooling module; 5-a liquid injection hole; 6-explosion-proof valve; 7-a sealing ring; 11-helical channels; 12-slotting; 21-electrode lugs; 21 a-positive tab; 21 b-negative electrode ear; 3 a-positive electrode posts; 3 b-a negative electrode column; 31-a chute; 41-a first cooling channel; 42-second cooling channels.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments. The examples are provided by way of explanation of the invention and not limitation of the invention. Indeed, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. Accordingly, it is intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.
In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. The terms "coupled," "connected," and "configured" as used herein are to be construed broadly and may be, for example, fixedly connected or detachably connected; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.
Referring to fig. 1, 2, 3 and 4, an embodiment of the present invention provides a battery pack in which an extending direction of an axis around which a spiral of a spiral path is wound is a vertical direction, a top side of a case is an upper side, and a bottom side of the case opposite to the top side is a lower side for convenience of description. Specifically, the battery pack includes: the shell 1, the shell 1 has an integral structure, at least one spiral channel 11 in spiral shape is arranged in the shell 1, the shape is similar to mosquito-repellent incense shape, each spiral channel 11 extends outwards in a Zhou Xiangyou around an axis, each spiral channel 11 is a spiral channel 11 which extends spirally around the axis in a plane, each spiral channel 11 comprises a plurality of spiral single turns, channels which are arranged in a stacked mode are formed in the radial direction of the spiral single turns of the spiral channel 11 and are used for accommodating the battery cells 2, and one side wall is shared between two channels which are adjacent in the radial direction of the spiral single turns, wherein in the whole shell 1, the side wall of the spiral channel 11 is except the side wall at the innermost side of the spiral center and the side wall at the outermost side of the spiral, and the two sides of the side wall at the spiral middle are respectively provided with a channel for accommodating the battery cells 2, so that the utilization rate of the side wall at the part of the spiral middle is improved, the weight of the shell 1 is reduced, the length of the battery cells 2 in the spiral channel 11 is longer, and the long battery cells 2 are placed in the spiral channel 11; each spiral channel 11 is internally provided with a laminated cell 2, each spiral channel 11 is also filled with electrolyte, in each pair of corresponding cell 2 and spiral channel 11, the cell 2 extends and distributes along the extending direction of the spiral channel 11, the top side of the cell 2 is opposite to the top wall of the spiral channel 11, the top side of each cell 2 is provided with a plurality of pairs of lugs 21 distributed along the extending direction of the spiral, each pair of lugs 21 comprises a plurality of lugs 21, and the lugs 21 are sequentially arranged at intervals along the extending direction of the spiral of the cell 2, wherein each pair of lugs 21 comprises a positive lug 21a and a negative lug 21b; in addition, the top side of the housing 1 is provided with a plurality of poles 3 corresponding to the plurality of lugs 21 one by one, each pair of mutually corresponding poles 3 and lugs 21 are electrically connected, preferably, a plurality of grooves 12 can be arranged on the top side of the housing 1 along the spiral extending direction of each spiral channel 11, the plurality of grooves 12 are arranged on the top wall of each spiral channel 11, the grooves 12 are communicated with the corresponding spiral channels 11, the grooves 12 are opposite to the lugs 21 on the battery core 2, the poles 3 are arranged at the grooves 12 on the top side of the housing 1, and the poles 3 are in sealing connection with the periphery of the grooves 12 of the housing 1, so that the poles 3 and the corresponding lugs 21 can be connected, and in order to ensure the connection tightness, sealing rings 7 can be arranged between the periphery of the poles 3 and the grooves 12, so that electrolyte leakage is avoided.
In the battery pack, the cavity in the shell 1 for accommodating the battery cell 2 is in a spiral shape and is a spiral channel 11, the spiral channel 11 extends spirally from inside to outside around an axis, wherein the spiral channel 11 is in a multi-turn spiral structure, at least one spiral channel 11 is spirally wound, a structure with a plurality of stacked channels is formed in the radial direction of a single spiral turn, the plurality of channels are in a multi-turn spiral overlapped structure of the same spiral channel 11, or the plurality of channels are in different spiral channels 11 and are simultaneously in a multi-turn spiral overlapped structure, one side wall is shared by two adjacent channels in the radial direction of a single spiral turn, the utilization ratio of the side wall is improved, the weight of the shell 1 can be effectively reduced, the energy density of the battery pack is improved, the shell 1 is in an integrated structure, the spiral channel 11 is directly formed in the shell 1, the spiral extending length of the spiral channel 11 is longer, one end of the battery cell 2 can extend into the other end of the spiral channel 11 from one port of the spiral channel 11, the battery cell 2 is in a long length of the battery cell 2, and therefore, the battery cell 2 can be formed into a single battery module with a long length, the single battery module can be directly assembled in the shell 1, the at least one side wall is not required to be assembled, the single battery module is directly assembled in the shell 1, and the complex structure is not required to be assembled, and the combined with at least one battery module 1 is further improved, and the structure is formed; on the other hand, the single battery of long electric core 2 is favorable to improving the capacity of battery to be favorable to realizing improving the high energy density design of battery package, in addition, set up in the utmost point post 3 that utmost point ear 21 connects in casing 1 topside, compare the structure setting of being connected with utmost point ear 21 in the top cap of battery among the prior art, the structure has been simplified in the increase, be favorable to reducing the weight of battery, be favorable to improving the energy density of battery package. Therefore, the shell in the battery pack has an integrated structure, the single battery has a long battery core design, the single battery can form a module, the shell structure is simplified, the shell weight is reduced, the capacity of the single battery is improved, and the energy density of the battery pack is improved.
In one possible implementation manner, the tabs 21 on each cell 2 are uniformly distributed along the spiral extending direction of the cell 2, the intervals between every two adjacent tabs 21 on the same cell 2 in the spiral extending direction are the same, the tabs 21 are uniformly arranged, and the positive tabs and the negative tabs are sequentially and alternately arranged along the spiral extending direction of the cell 2, so that heat is uniformly generated when the cell 2 works.
In one possible implementation, two or three spiral channels 11 may be provided in the housing 1, where the two or three spiral channels 11 extend in parallel along the direction of extension of the spiral, and each adjacent two spiral channels 11 share a side wall along the radial direction of a single turn of the spiral channels 11. The battery core 2 is arranged in each spiral channel 11 of the two or three spiral channels 11, so that two or three batteries are directly formed, and the poles between the two or three batteries are connected in series, parallel or series-parallel or parallel-series mode to realize high working voltage, thereby meeting the application requirements of battery packs. And two or three spiral channels are arranged in parallel, so that connection is convenient when the batteries are connected, and the connection structure is facilitated to be simplified. For convenience of description, the two spiral channels 11 are arranged in the shell 1 to form a battery pack formed by two single batteries, the two spiral channels 11 extend in parallel in a spiral extending direction, the length of each positive electrode column is greater than or equal to the length of a corresponding positive electrode lug, the length of each negative electrode column is greater than or equal to the length of a corresponding negative electrode lug, the two batteries can be called as a first battery and a second battery for convenience of description, the electrode columns 3 of the two batteries are all positioned at the top side of the shell 1, the electrode lugs 21 of the two batteries 2 are divided into positive electrode lugs and negative electrode lugs which are sequentially and alternately arranged, the electrode columns 3 of the same battery are also divided into positive electrode columns 3a and negative electrode columns 3b which are sequentially and alternately arranged, and in the spiral extending direction, the length of each positive electrode column is greater than or equal to the length of a corresponding negative electrode lug, wherein the first battery and the second battery can be connected in series through the electrode columns of the two batteries, or the first battery and the second battery can be connected in parallel through the electrode columns of the two batteries, or the two batteries can be divided into two spiral extending regions in the serial connection regions according to the serial connection direction, and each part is divided into two partial serial connection regions, and each serial connection region is divided into two partial serial connection regions; or the two batteries are divided according to the spiral extending direction, the two batteries are divided into a plurality of areas, the first battery and the second battery in each area are connected in parallel through the pole, the part of each area of the two batteries, which is connected in parallel, is called a local parallel part, and then all the local parallel parts of the two batteries are connected in parallel, so that the parallel connection of the two batteries is realized. It should be noted that, for the serial-parallel connection of the two batteries, the connection relationship of the serial connection portion of the two batteries may be formed by connecting the other first portions of the two batteries in series, and then connecting the serial connection portion of the two batteries in parallel, and the parallel connection relationship of the parallel connection portion of the two batteries may be formed by connecting the other first portions of the two batteries in parallel, and then connecting the parallel connection portion of the two batteries in series.
In the specific implementation, as shown in fig. 3 and 5, a side of the pole 3 facing the spiral channel 11 is provided with a chute 31 extending along the spiral extending direction, and the tab 21 corresponding to the pole 3 is connected with a connecting piece, and the connecting piece at least partially extends into the chute 31 and is connected with the side wall of the chute 31 in a matching manner. The material of connection piece can be copper, the connection piece can slide in spout 31 along the extending direction of spout 31, also can be connected with spout 31 cooperation, wherein, when carrying out electric core 2 and assembling in toward casing 1, stretch into the port of the one end of electric core 2's the outside of spiral passageway 11, stretch into the one end of spiral passageway 11 earlier with electric core 2, the one end that makes electric core 2 go into earlier is called the head end, make the tab 21 on the electric core 2 towards the top side of casing 1, wherein connection piece can cooperate with spout 31 below terminal 3, can insert the connection piece in spout 31 along spout 31 hard, push away electric core 2 inwards spiral passageway 11, then electric core 2 can slowly follow spiral passageway 11 and inject in the spiral passageway 11. Preferably, the sliding groove 31 below the pole 3 may be formed by two connection blocks, wherein the side of the pole facing the spiral channel is provided with two connection blocks, the two connection blocks are arranged at intervals along the radial direction of the spiral single turn of the spiral channel, and the interval between the two connection blocks forms the sliding groove 31.
Specifically, referring to fig. 3, along the radial direction of a single spiral turn of the spiral channel 11, the cross section of the chute 31 is triangular, one side of the triangle is located at the bottom of the chute 31, the angle opposite to the side faces the spiral channel 11, the part of the connecting piece extending into the chute 31 forms a triangular connecting part matched with the chute 31, wherein the chute 31 is in a inverted triangle shape, and the connecting piece is arranged in the inverted triangle shape, so that the connecting piece is inserted into the chute 31 to be matched with the chute 31 with good stability; alternatively, referring to fig. 4, along the radial direction of the spiral single turn of the spiral channel 11, the cross section of the sliding groove 31 is circular, the part of the connecting piece extending into the sliding groove 31 forms a circular connecting part matched with the sliding groove 31, the connecting piece is stably matched with the sliding groove 31 after being inserted into the sliding groove 31, and the connection stability of the tab 21 and the pole 3 is ensured.
More specifically, the pole 3 can form an integral structure with the housing 1 through integral casting, thereby omitting a complex welding process and reducing the production cost.
In one possible implementation, as shown in fig. 1 and 2, a void is formed at the spiral center of the housing 1; the battery pack further includes the cooling module 4, the cooling module 4 includes a first cooling part located in the void, the first cooling part includes a first cooling passage 41 for circulation of a cooling liquid, the first cooling passage 41 is adjacent to a side wall around the void, specifically, the first cooling passage 41 may be provided along the side wall around the void, and the first cooling passage 41 shares the same side wall with the innermost portion of the spiral passage 11 at the center of the spiral, so that the first cooling passage 41 and the innermost portion of the spiral passage 11 have only one wall therebetween, which is advantageous for enhancing the cooling effect. Preferably, the first cooling channel 41 may be configured as two comma-shaped cavities fastened to each other, and the two cavities are communicated, where the first cooling portion further includes a circulation pump disposed in the hollow space, the circulation pump is connected to the first cooling channel 41, and the circulation pump can circulate the cooling liquid, so as to facilitate cooling of the battery.
Preferably, as shown in fig. 2, the cooling module further comprises a second cooling channel 42 for circulation of a cooling liquid at the top side of the housing 1, the second cooling channel 42 being in communication with the first cooling channel 41, the second cooling channel 42 being spirally distributed around the axis. The second cooling channel 42 is arranged along the spiral extending direction in a spiral manner, so that the pole 3 is prevented from being damaged, the second cooling channel 42 is fully distributed on the top side of the shell 1 as much as possible, the second cooling channel 42 is arranged on the top side of the shell 1 and around the pole 3, the temperature of the periphery of the pole 3 is reduced, and the temperature reducing effect of the battery pack is improved.
The second cooling channel comprises branch cooling channels, and the branch cooling channels are arranged on the top side of the shell in one-to-one correspondence with the spiral channels, so that each battery is correspondingly provided with the branch cooling channels, and the cooling effect of the battery pack is improved.
Specifically, the cooling liquid may be water, and the first cooling channel and the second cooling channel are water-cooled pipes.
Referring to fig. 2, in order to increase structural strength stability of the housing, adjacent two poles 3 are not overlapped in a radial direction of a spiral single turn of the spiral passage 11. That is, in the radial direction of the spiral single turn of the spiral channel 11, two adjacent polar posts 3 are arranged in a staggered manner, so that two adjacent polar posts 3 in the radial direction of the spiral single turn of the spiral channel 11 are not arranged in parallel, the structural stability of the housing 1 can be effectively increased, and the polar posts 3 are conveniently connected with other polar posts 3 or connection structures.
In one possible implementation, the material of the housing may be aluminum, stainless steel, or plastic.
In one possible implementation, as shown in fig. 2, each spiral channel 11 is provided with at least one liquid injection hole, the liquid injection holes may be disposed on the top side of the casing, each spiral channel 11 may be provided with two liquid injection holes, and the two liquid injection holes are disposed at intervals, so that electrolyte can be conveniently injected into the spiral channel 11, where the number of the liquid injection holes may also be three, four or other numbers, and the embodiment is not limited; each spiral channel 11 is connected with at least one explosion-proof valve 6, and explosion-proof valve 6 can be installed in the top side of casing 1, specifically, two explosion-proof valves 6 can be connected to each spiral channel 11, and two explosion-proof valves 6 interval sets up, and the gas in the spiral channel 11 of being convenient for discharges, guarantees the safe handling of battery package, and wherein, explosion-proof valve 6 hole's number also can be three, four or other quantity, and this embodiment is not limited.
Based on the same inventive concept, the embodiment also provides an electric vehicle, which includes any one of the battery packs provided in the above embodiment, and the battery pack may be a lithium battery pack, and the electric vehicle includes an engine, and the battery pack is used for providing electric energy to the engine.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A battery pack, comprising:
the shell is provided with two or three spiral channels in an integrated structure, each spiral channel extends outwards in a spiral mode around the Zhou Xiangyou axis, the two or three spiral channels extend in parallel along the spiral extending direction, and each two adjacent spiral channels share one side wall along the radial direction of a single spiral turn of the spiral channel;
the battery cells are positioned in the spiral channels and extend along the extending direction of the spiral channels, the top side of each battery cell is opposite to the top wall of the spiral channel, a plurality of pairs of lugs distributed along the extending direction of the spiral are arranged on the top side of each battery cell, and each pair of lugs comprises a positive lug and a negative lug;
the pole posts are positioned on the top side of the shell and correspond to the pole lugs one by one, and each pair of pole posts and the corresponding pole lug are electrically connected;
the side, facing the spiral channel, of the pole is provided with a sliding groove extending along the spiral extending direction, the pole lug corresponding to the pole is connected with a connecting sheet, and at least part of the connecting sheet extends into the sliding groove and is connected with the side wall of the sliding groove in a matching way;
the cross section of the sliding groove is triangular along the radial direction of the spiral single ring of the spiral channel, one side edge of the triangle is positioned at the bottom of the sliding groove, the angle opposite to the side edge faces the spiral channel, and the part of the connecting piece extending into the sliding groove forms a triangular connecting part matched with the sliding groove; or,
along the radial direction of the spiral single circle of the spiral channel, the section of the chute is circular, and the part of the connecting sheet extending into the chute forms a circular connecting part matched with the chute.
2. The battery pack according to claim 1, wherein the tabs on each of the cells are uniformly distributed along the spiral extension direction of the cell, and the positive tabs and the negative tabs are sequentially alternately arranged along the spiral extension direction of the cell.
3. The battery pack according to any one of claims 1 to 2, wherein a void is formed at a spiral center of the case; the battery pack further includes a cooling module including a first cooling portion located in the void, the first cooling portion including a first cooling channel for circulation of a cooling fluid, the first cooling channel being adjacent to a side wall around the void.
4. The battery pack of claim 3, wherein the cooling module further comprises a second cooling channel on the top side of the housing for circulation of the cooling fluid, the second cooling channel in communication with the first cooling channel, the second cooling channel extending helically around the circumference of the axis.
5. The battery pack according to any one of claims 1-2, wherein adjacent two of the poles do not overlap in the radial direction of the spiral single turn of the spiral channel.
6. The battery pack according to any one of claims 1-2, wherein each of the spiral channels is provided with at least one liquid injection hole; at least one explosion-proof valve is connected with each spiral channel.
7. An electric vehicle comprising the battery pack according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211396097.3A CN115832456B (en) | 2022-11-08 | 2022-11-08 | Battery pack and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211396097.3A CN115832456B (en) | 2022-11-08 | 2022-11-08 | Battery pack and electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115832456A CN115832456A (en) | 2023-03-21 |
| CN115832456B true CN115832456B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211396097.3A Active CN115832456B (en) | 2022-11-08 | 2022-11-08 | Battery pack and electric automobile |
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| CN (1) | CN115832456B (en) |
Citations (7)
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| KR20190090956A (en) * | 2018-01-26 | 2019-08-05 | 주식회사 엘지화학 | Cylindrical Battery Case with Adjustable Length |
| CN113437410A (en) * | 2020-08-04 | 2021-09-24 | 珠海冠宇电池股份有限公司 | Button cell and preparation method thereof |
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2022
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| US6287719B1 (en) * | 1998-06-15 | 2001-09-11 | Eveready Battery Company, Inc. | Battery including a non-aqueous multi-cell spiral-wound electrode assembly |
| JP2001160384A (en) * | 1999-12-01 | 2001-06-12 | Japan Storage Battery Co Ltd | Cylindrical secondary battery |
| CN102035040A (en) * | 2009-09-28 | 2011-04-27 | 清华大学 | Method for manufacturing combined battery and combined battery |
| CN105900261A (en) * | 2014-01-09 | 2016-08-24 | A123系统有限责任公司 | Electrochemical multi-cell and method therefor |
| CN106785094A (en) * | 2017-04-15 | 2017-05-31 | 陈学琴 | Continuous lug spirally wound lead acid battery |
| KR20190090956A (en) * | 2018-01-26 | 2019-08-05 | 주식회사 엘지화학 | Cylindrical Battery Case with Adjustable Length |
| CN113437410A (en) * | 2020-08-04 | 2021-09-24 | 珠海冠宇电池股份有限公司 | Button cell and preparation method thereof |
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| CN115832456A (en) | 2023-03-21 |
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