CN220138455U - Battery pack and electric automobile - Google Patents
Battery pack and electric automobile Download PDFInfo
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- CN220138455U CN220138455U CN202321638970.5U CN202321638970U CN220138455U CN 220138455 U CN220138455 U CN 220138455U CN 202321638970 U CN202321638970 U CN 202321638970U CN 220138455 U CN220138455 U CN 220138455U
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- battery cell
- side wall
- battery pack
- cell
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- 239000007788 liquid Substances 0.000 claims abstract description 115
- 238000001816 cooling Methods 0.000 claims abstract description 86
- 239000000178 monomer Substances 0.000 claims description 27
- 239000000945 filler Substances 0.000 claims description 19
- 230000004308 accommodation Effects 0.000 claims 2
- 230000003014 reinforcing effect Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003892 spreading 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
Abstract
The application discloses a battery pack and an electric automobile, wherein the battery pack is provided with a plurality of liquid cooling plates at intervals along a first direction, each liquid cooling plate comprises a sub-plate which is arranged along a second direction, a containing cavity is defined between two sub-plates which are oppositely arranged along the first direction, single batteries are connected with adjacent sub-plates, a containing space is defined between two adjacent single batteries along the second direction, and a second single battery is arranged in the containing space, so that the containing space between two first single batteries is utilized, the space utilization rate of the battery pack is improved, and the energy density of the battery pack is further improved.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery pack and an electric automobile.
Background
In the existing battery pack, the single battery is clamped between two liquid cooling plates which are parallel to each other, so that the fixing effect of the single battery is guaranteed, the liquid cooling plates are designed into a folded line shape, the clamping force of the single battery is improved, but due to the folded line shape design of the liquid cooling plates, gaps are formed between two adjacent single batteries, and the space utilization rate in the battery pack is low.
Disclosure of Invention
The utility model aims to provide a battery pack and an electric automobile, which are used for solving the problem of low space utilization rate in the battery pack at present.
A first aspect of an embodiment of the present utility model provides a battery pack including: a plurality of first battery cells; a plurality of second battery cells; the liquid cooling plates are arranged at intervals along the first direction, each liquid cooling plate comprises a plurality of sub-plates which are arranged along the second direction and connected with each other, and in two adjacent liquid cooling plates, the sub-plate of one liquid cooling plate and the sub-plate of the other liquid cooling plate are arranged oppositely and define a containing cavity, and at least one first battery monomer is arranged in the containing cavity; the first battery monomer is connected with the daughter board; along the second direction, a containing space is arranged between two adjacent first battery monomers, at least one second battery monomer is arranged in the containing space, and the volume of the first battery monomer is larger than that of the second battery monomer.
Optionally, along said first direction,
the first battery cells comprise oppositely arranged side walls, the adjacent side walls of the first battery cells define the accommodating space, the first battery cells have a thickness direction, and the first battery cells have opposite first ends and second ends along the thickness direction; in the second direction, the dimension between the second ends of adjacent first cells is greater than the dimension between the first ends; the second battery cell is disposed adjacent the second end.
Optionally, along the second direction, an included angle α is formed between at least two sub-boards that are adjacently disposed, and an radian of the included angle α is θrad, which satisfies: 0 < theta < pi.
Optionally, the first battery unit includes a first side wall and a second side wall which are oppositely arranged, and a third side wall and a fourth side wall which are oppositely arranged, and the first side wall and/or the second side wall is/are the surface with the largest surface area; at least one of the first side wall and the second side wall meets the adjacent daughter board.
Optionally, the first battery cell further includes a third side wall and a fourth side wall disposed opposite to each other, and the second battery cell is connected to at least one of the fourth side wall and the third side wall; the outer wall surface of the second battery monomer, which is contacted with the third side wall, is a cambered surface; and/or the outer wall surface of the second battery monomer, which is contacted with the fourth side wall, is an arc surface.
Optionally, a filler is further disposed in the accommodating space, and the filler is connected with at least one of the first battery cell and the second battery cell; the heat conductivity of the filler is 0.012W/mK-0.07W/mK. Optionally, the second battery unit is a cylindrical battery; the first battery cell is a square battery.
Optionally, the first electricityThe maximum dimension of the pool monomer in the third direction is H 1 mm, the maximum dimension of the second battery cell in the third direction is H 2 mm, satisfy: h is more than or equal to 0.9 2 /H 1 The third direction is less than or equal to 1.1, and the third direction is intersected with the first direction and the second direction in pairs.
Optionally, the battery pack further includes a connection piece, and the first battery cell and the second battery cell are electrically connected through the connection piece, and the electrical connection includes at least one of series connection and parallel connection.
Optionally, the battery pack further includes a connection piece, a plurality of the first battery cells are electrically connected through the connection piece, a plurality of the second battery cells are electrically connected through the connection piece, and the electrical connection includes at least one of series connection and parallel connection.
Optionally, the battery pack further includes a connection piece, one first battery unit and one second battery unit are connected in series through the connection piece to form a battery module, and a plurality of battery modules are electrically connected through the connection piece, and the electrical connection includes at least one of series connection and parallel connection.
Optionally, the liquid cooling plate is of a harmonica tube structure.
A second aspect of the embodiments of the present application provides an electric vehicle, including a battery pack as described above.
In summary, an embodiment of the application provides a battery pack and an electric vehicle with the battery pack, wherein the battery pack is provided with a plurality of liquid cooling plates at intervals along a first direction, each liquid cooling plate comprises a sub-plate which is arranged along a second direction, a containing cavity is defined between two sub-plates which are oppositely arranged along the first direction, a first side wall and a second side wall of a single battery are respectively connected with adjacent sub-plates, a containing space is defined between two adjacent single batteries along the second direction, and a second single battery is arranged in the containing space, so that the space between the two first single battery is utilized, the space utilization rate of the battery pack is improved, and the energy density of the battery pack is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, 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 battery pack according to an embodiment of the present application;
Fig. 2 is an exploded view of a battery pack according to an embodiment of the present application;
fig. 3 is a partially exploded view of a battery pack according to an embodiment of the present application;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is an enlarged schematic view of the structure at A of FIG. 4;
FIG. 6 is a schematic view of the structure of FIG. 5 with the first and second connecting tabs removed;
fig. 7 is a schematic diagram of a connection structure between a first battery cell and a second battery cell in a battery pack according to an embodiment of the present application;
fig. 8 is a schematic diagram of a combination structure of a liquid cooling plate and a first battery cell in a battery pack according to an embodiment of the present application;
FIG. 9 is a B-B cross-sectional view of FIG. 8;
FIG. 10 is an enlarged schematic view of the structure of FIG. 9 at C;
fig. 11 is a schematic structural diagram of a liquid cooling plate in a battery pack according to an embodiment of the present application;
fig. 12 is a schematic view showing a partial structure of a liquid cooling plate in a battery pack according to an embodiment of the present application;
fig. 13 is a schematic structural diagram of a first battery cell in a battery pack according to an embodiment of the present application;
fig. 14 is a schematic structural diagram of a second battery cell in the battery pack according to the embodiment of the application.
The main reference numerals illustrate:
1. a battery pack;
10. the battery comprises a first battery cell, 11, a first side wall, 12, a second side wall, 13, a third side wall, 131, an accommodating space, 1311, a first end, 1312, a second end, 14, a fourth side wall, 15, a bottom wall, 16, a top wall, 161 and a pole;
20. A second battery cell 21, a main body 22 and a connecting end;
30. the liquid cooling plates 30a, the first liquid cooling plate 30b, the second liquid cooling plate 31, the daughter board 311, the first surface 312, the second surface 32, the connecting part 33, the runner 34, the reinforcing rib 35, the liquid inlet 36 and the liquid outlet;
41. a first connecting piece 42, a second connecting piece 43 and a third connecting piece;
50. a case;
60. a liquid inlet pipe 61 and a liquid supply port;
70. a liquid outlet pipe 71 and a liquid return port;
x, first direction, Y, second direction, Z, third direction, W, fourth direction, alpha and included angle.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is intended to illustrate the application, and not to limit the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "plurality" means two or more, unless specifically defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.
The term "parallel" in the present application includes not only the case of absolute parallelism but also the case of general parallelism as conventionally recognized in engineering, for example, "parallel" refers to a state in which straight lines form an angle of-1 ° to 1 ° with straight lines, straight lines form a plane, or plane form a plane; meanwhile, "vertical" includes not only the case of absolute vertical but also the case of substantially vertical as conventionally recognized in engineering, for example, vertical "refers to a state in which an angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89 ° to 91 °. The distances are equal or the angles are equal, not only the absolute equal condition is included, but also the general equal condition of the conventional cognition in engineering is included, and certain errors can exist, such as a state that the tolerance range is between-1% and 1%.
In some embodiments of the present application, an electric vehicle is provided that includes a battery pack.
In some embodiments of the present application, there is provided a battery pack, referring to fig. 1 to 14, the battery pack 1 including: a first battery cell 10, a second battery cell 20, and a liquid cooling plate 30.
Referring to fig. 13, the first battery cell 10 includes a first side wall 11 and a second side wall 12 that are disposed opposite to each other, and referring to fig. 1 to 4, among the two liquid cooling plates 30 that are adjacent in the first direction X, the sub-plate 31 of one liquid cooling plate 30 is disposed opposite to the sub-plate 31 of the other liquid cooling plate 30 and defines a receiving chamber, and it should be noted that the two sub-plates 31 may be disposed opposite to each other along a direction intersecting the first direction X; specifically, referring to fig. 3, two adjacent liquid cooling plates 30 in the first direction X include a first liquid cooling plate 30a and a second liquid cooling plate 30b, at least a portion of the sub-plates 31 in the first liquid cooling plate 30a and at least a portion of the sub-plates 31 in the second liquid cooling plate 30b are in one-to-one correspondence, a receiving cavity is defined between the two sub-plates 31, and in the embodiment shown in fig. 3, one first battery cell 10 is disposed in each receiving cavity, a first side wall 11 of the first battery cell 10 is connected to the sub-plate 31 in the first liquid cooling plate 30a, and a second side wall 12 is connected to the sub-plate 31 in the second liquid cooling plate 30 b.
In some embodiments of the present application, referring to fig. 1 to 4, the number of liquid cooling plates 30 is plural, the plurality of liquid cooling plates 30 are arranged at intervals along the first direction X, each liquid cooling plate 30 includes a plurality of sub-plates 31 arranged and connected along the second direction Y, at least part of two sub-plates 31 adjacent to each other along the second direction Y have an included angle α, and the radian of the included angle α is θrad, which satisfies the following conditions: referring to fig. 12, the openings of two adjacent included angles α along the second direction Y are opposite in direction, i.e., the two adjacent included angles α along the second direction Y are alternately distributed on two sides of the liquid cooling plate 30 along the first direction X, so that the liquid cooling plate 30 presents a fold line structure.
Due to the design of the structure of the included angle alpha between the two sub-boards 31 adjacently arranged along the second direction Y, the first battery cell 10 is obliquely arranged between the two liquid cooling plates 30, so that the first battery cell 10 is limited and fixed in the first direction X and the second direction Y, and the connection reliability between the two adjacent first battery cells 10 is improved. According to the change of the radian theta of the included angle alpha, the integral length and width of the battery pack formed by the liquid cooling plate 30 and the first battery cell 10 can be adjusted, the compatibility of different battery pack sizes is realized, the corresponding liquid cooling plate 30 only needs to be adjusted to the angle of the corresponding lamination of the sub-plate 31 and the first battery cell 10, and the battery pack adaptability is realized. The plurality of first battery cells 10 are connected into a whole through the liquid cooling plate 30, in this case, the side plates can be omitted in the battery pack 1, structures such as inner beams can be omitted, the space utilization rate in the battery pack 1 can be greatly improved, the structural strength and the energy density of the battery pack 1 are improved, and therefore the performance of the battery pack 1 is improved.
Because the liquid cooling plates 30 have a fold-line structure, the accommodating cavities are also communicated and form the fold-line structure, the first battery cells 10 arranged in the accommodating cavities can be limited and fixed in the first direction X and the second direction Y, the first battery cells 10 are prevented from moving in the second direction Y, the two liquid cooling plates 30 are arranged at intervals along the first direction X, the first battery cells 10 can be limited and fixed in the first direction X, the first battery cells 10 cannot move at the positions, the first battery cells 10 are fixed in the horizontal direction, the loss of other parts and materials required for fixing the first battery cells 10 is reduced, the connection reliability between the first battery cells 10 and the liquid cooling plates 30 is ensured, and the overall reliability of the battery pack 1 is further improved. In addition, the liquid cooling plate 30 can replace an inner beam structure of the battery pack 1, plays a role in guiding and supporting the first battery cell 10, reduces the types and the number of components in the battery pack 1, realizes integration of functions, reduces the cost of the battery pack 1, and realizes the effect of light weight of the battery pack 1.
However, due to the design of the fold-line structure of the liquid cooling plate 30, referring to fig. 2 to 3 and fig. 5 to 7, a receiving space 131 is formed between two adjacent first battery cells 10 in the second direction Y, specifically, the first battery cells 10 include a third side wall 13 and a fourth side wall 14 opposite to each other, and a maximum space virtually defined between the outer contour lines of the third side wall 13 and the fourth side wall 14 of one of the two adjacent first battery cells 10 in the second direction Y may be the receiving space 131, and the presence of the receiving space 131 may result in a decrease in the space utilization rate in the battery pack 1, thereby affecting the energy density of the battery pack 1, as in the embodiment shown in fig. 6 and 7, one second battery cell 20 is disposed in the receiving space 131. The second battery cells 20 are arranged in the accommodating space 131, so that the space in the accommodating space 131 can be utilized, the space utilization rate of the whole battery pack 1 is improved, and the energy density of the battery pack 1 is improved.
In some embodiments of the present application, in the accommodating space 131 defined by two adjacent first battery cells 10 in the second direction Y, two or more second battery cells 20 are disposed, and the two or more second battery cells 20 form a battery unit, which can separate the two adjacent first battery cells 10 to avoid the two adjacent first battery cells 10 from directly pressing each other. The second battery cells 20 may be shaped batteries, gaps are formed between adjacent second battery cells 20, and at this time, the gaps between the plurality of second battery cells 20 in the battery unit may provide space for expansion of each first battery cell 10, thereby improving cycle performance of the first battery cell 10 and prolonging life of the first battery cell 10.
In some embodiments of the present application, the first battery cell 10 is provided with battery cells at both outer sides of the ends in the second direction Y, and the battery cells may protect the first battery cell 10 from both ends to reduce the risk of failure of the first battery cell 10.
In some embodiments of the present application, at least one end of the first battery cell 10 in the second direction Y is provided with a battery cell. When one side of the first battery cell 10 in the second direction Y is externally impacted, the gaps of the battery cells may act to disperse stress to reduce the risk of failure of the first battery cell 10.
In this embodiment, the volume of the first battery cell 10 is larger than the volume of the second battery cell 20, and when the dimensions of the first battery cell 10 and the second battery cell 20 in the third direction Z are the same, the projected area of the first battery cell 10 in the third direction Z on the plane perpendicular to the third direction Z is larger than the corresponding projected area of the second battery cell 20. In some embodiments, the projections of the first cell 10 and the second cell 20 may be the same shape and different areas; in the embodiments shown in fig. 1 to 9 and fig. 13 to 14, the first battery cell 10 is a square battery, the shape of the orthographic projection of the first battery cell 10 in the third direction Z is square, the second battery cell 20 is a cylindrical battery, and the shape of the orthographic projection of the second battery cell 20 in the third direction Z is circular. In other implementations of the present application, the second battery cell 20 may be a special-shaped battery, for example, the shape of the orthographic projection of the second battery cell 20 in the third direction Z is an ellipse, triangle, pentagon or irregular pattern, as long as the shape of the orthographic projection of the second battery cell 20 in the third direction Z is different from the shape of the orthographic projection of the first battery cell 10 in the third direction Z, so that the volumes of the first battery cell 10 and the second battery cell 20 are different, and the second battery cell 20 may fill the gap between the adjacent first battery cells 10.
In some embodiments of the present application, referring to fig. 13, the first battery cell 10 includes a third side wall 13 and a fourth side wall 14 disposed opposite to each other, and the first side wall 11, the third side wall 13, the second side wall 12, and the fourth side wall 14 are sequentially connected end to form a hollow cube with two open ends, and referring to fig. 3 and fig. 5 to fig. 7, two first battery cells 10 disposed adjacently along the second direction Y define a receiving space 131 between the third side wall 13 and the fourth side wall 14 of one of the two first battery cells. It should be understood that, in the present embodiment, the third side wall 13 and the fourth side wall 14 are defined only for convenience of describing the relationship between the first battery cells 10, and it should not be understood that the definition of the sequence of the respective faces in the first battery cells 10, that is, two first battery cells 10 disposed adjacently along the second direction Y may be adopted, where a receiving space 131 is provided between the third side wall 13 of one and the third side wall 13 of the other.
The first battery cell 10 includes opposite side walls, the adjacent side walls of the first battery cell 10 define an accommodating space 131, the first battery cell 10 has a thickness direction, and the first battery cell 10 has opposite first and second ends 1311 and 1312 along the thickness direction; in the second direction Y, the dimension between the second ends 1312 of adjacent first battery cells 10 is greater than the dimension between the first ends 1311; the second cell 20 is disposed adjacent the second end 1312. In this way, the size of the second battery cell 20 in the receiving space 131 may be as large as possible to maximize the volume utilization of the battery pack. It will be appreciated that in some embodiments, the third side wall 13 of one of the adjacent first battery cells 10 and the fourth side wall 14 of the other are disposed adjacent, and the third side wall 13 and the fourth side wall 14 define the accommodating space 131.
In some embodiments of the present application, referring to fig. 5 to 7, an included angle is formed between the third side wall 13 of one first battery cell 10 and the plane where the fourth side wall 14 of another first battery cell 10 is located, so that a receiving space 131 with a cross-section of a transverse triangle or a transverse trapezoid structure is formed between the third side wall 13 and the fourth side wall 14.
In some embodiments of the present application, referring to fig. 3 and fig. 6, the opening direction of the included angle α between two sub-boards 31 disposed adjacently along the second direction Y faces the second end 1312 of the accommodating space 131, so that an accommodating space is defined between the third sidewall 13, the fourth sidewall 14 and the adjacent liquid cooling plate 30, and the accommodating space is the accommodating space 131. The first battery cell 10 can be detached or installed through the accommodating space 131, and the second battery cell 20 can be placed in the accommodating space 131, so that the utilization rate of the space occupied by the accommodating space 131 is improved. In an application scenario, when a certain first battery cell 10 is damaged, it can be removed through the accommodating space 131 nearby, and the second battery cell 20 can also be taken out from the accommodating space 131. In another application scenario, after the first battery cells 10 are used for a long time, the first battery cells 10 can be aged, and when the first battery cells cannot continue to work in a normal state, each first battery cell 10 can be disassembled through the accommodating space so as to be utilized in a gradient manner. The first battery cell 10 after being disassembled can be applied to some charging and discharging fields with low requirements. To improve the maintenance economy of the battery pack.
In the embodiments shown in fig. 1 to 9 and fig. 13 to 14, the first direction X and the second direction Y are perpendicular to the third direction Z.
In some embodiments of the present application, the first battery cell 10 further includes a bottom wall 15 and a top wall 16 that are disposed opposite to each other, where the bottom wall and the top wall respectively cover the first side wall 11, the third side wall 13, the second side wall 12, and the fourth side wall 14, and are sequentially connected end to enclose two open ends of the hollow cube, so as to form a hexahedral structure together, where the first side wall 11 and/or the second side wall 12 are walls with the largest surface area in the hexahedral structure, the two walls with the largest surface area of the first battery cell 10 are connected with the sub-board 31 of the liquid cooling board 30, the first battery cell 10 generates heat during charging and discharging operations, and the two walls with the largest surface area of the first battery cell 10 are connected with the sub-board 31, so that the heat exchange of the first battery cell 10 can be realized to a greater extent, and the thermal management effect is improved.
In some embodiments of the present application, a heat-conducting structural adhesive is disposed between the first side wall 11 and the second side wall 12 and the connected sub-board 31, and the heat-conducting adhesive can serve to connect the first battery cell 10 and the liquid cooling plate 30, so as to enhance the overall connection strength, and meanwhile, not to affect the temperature management of the liquid cooling plate 30 on the first battery cell 10.
In some embodiments of the present application, the third side wall 13 and the fourth side wall 14 of the first battery cell 10 are respectively connected to the adjacent sub-board 31, that is, two sides of the first battery cell 10 with relatively smaller surface area are connected to the sub-board 31, so that more first battery cells 10 can be sandwiched between the liquid cooling plates 30, so as to increase the capacity of the battery pack 1, which can be specifically selected according to practical use requirements.
In some embodiments of the present application, the second battery cell 20 interfaces with at least one of the third sidewall 13 and the fourth sidewall 14. In the embodiment shown in fig. 6 and 7, the outer wall surface of the second battery cell 20 is connected to the third and fourth side walls 13 and 14, respectively.
In some embodiments of the present application, the second cell 20 is attached to the third sidewall 13.
In some embodiments of the present application, the second battery cell 20 is connected to the fourth side wall 14.
The outer wall surface of the second battery monomer 20 contacts with the side wall of the first battery monomer 10, so that the heat transfer area between the first battery monomer 10 and the second battery monomer 20 can be reduced, the heat transfer rate between the first battery monomer 10 and the second battery monomer 20 is reduced, when a certain battery cell is out of control, the risk of heat diffusion is reduced, and the safety of the battery pack 1 is improved.
In some embodiments of the present application, the outer wall surface of the second battery cell 20 contacting the third side wall 13 is an arc surface, the wall surface of the third side wall 13 is a plane, the outer wall surface of the second battery cell 20 may directly abut against the third side wall 13, or other structures may be provided to connect to the third side wall 13, for example, the outer wall surface of the second battery cell 20 may be adhered to the third side wall 13 by a glue, so as to improve the stability of the connection between the second battery cell 20 and the first battery cell 10.
In some embodiments of the present application, the outer wall surface of the second battery cell 20 contacting the fourth side wall 14 is an arc surface, the wall surface of the fourth side wall 14 is a plane, the outer wall surface of the second battery cell 20 may directly abut against the fourth side wall 14, or other structures may be provided to connect to the fourth side wall 14, for example, the outer wall surface of the second battery cell 20 may be adhered to the fourth side wall 14 by a glue, so as to improve the stability of the connection between the second battery cell 20 and the first battery cell 10.
The arc surface of the outer wall surface of the second battery unit 20 contacting the third sidewall 13 and/or the fourth sidewall 14 may be an elliptical arc surface, a cylindrical surface, a spherical surface or other arc surfaces, which may be specifically selected according to practical use requirements.
In some embodiments of the present application, the liquid cooling plate 30 further includes a connection portion 32, two sub-plates 31 disposed adjacently along the second direction Y are connected by the connection portion 32, the connection portion 32 and the second battery cell 20 are disposed along the first direction X, a surface of the connection portion 32 facing the second battery cell 20 in the first direction X is a cambered surface, and correspondingly, an outer wall surface of the second battery cell 20 facing the connection portion 32 in the first direction X is a cambered surface, so that the second battery cell 20 is attached to the connection portion 32, and the two sub-plates 31 disposed adjacently along the second direction Y can form a clamping and fixing of the second battery cell 20 in the second direction Y.
In some embodiments of the present application, a heat-conducting structural adhesive is disposed between the second battery unit 20 and the connection portion 32, and the heat-conducting adhesive can serve to connect the second battery unit with the liquid cooling plate 30, so as to enhance the overall connection strength, and meanwhile, not to affect the temperature management of the liquid cooling plate 30 on the second battery unit 20.
In some embodiments of the present application, referring to fig. 12, two sub-boards 31 of the liquid cooling plate 30 disposed adjacent to each other in the second direction Y are sequentially connected, specifically, two sub-boards 31 disposed adjacent to each other in the second direction Y are directly connected to each other.
In some embodiments of the present application, referring to fig. 6 and 7, the outer wall surface of the second battery cell 20 is connected to the third side wall 13 and the fourth side wall 14, respectively, the second battery cell 20 is disposed at the second end 1312 of the accommodating space 131, a filling cavity (not shown in the drawings) is defined between the second battery cell 20 and the first end 1311 in the accommodating space 131, a filler is disposed in the filling cavity, one end of the filler in the first direction X abuts against the second battery cell 20, the filler is a heat insulation material, and the heat insulation material is filled in the filling cavity of the accommodating space 131, so that the heat spreading can be slowed down or even blocked when any one of the first battery cell 10 and the second battery cell 20 is in thermal runaway, and the potential safety hazard caused by the thermal runaway in a large range can be prevented.
In some embodiments of the present application, the filler is connected to the first battery cell 10.
In some embodiments of the present application, the filler is connected to the first battery cell 10 and the second battery cell 20, respectively.
In some embodiments of the application, the thermal conductivity of the filler is 0.012W/m.K to 0.07W/m.K, specifically, the thermal conductivity of the filler may be 0.012W/m.K, 0.013W/m.K, 0.015W/m.K, 0.018W/m.K, 0.019W/m.K, 0.020W/m.K, 0.021W/m.K, 0.022W/m.K, 0.023W/m.K, 0.024W/m.K, 0.03W/m.K, 0.04W/m.K, 0.05W/m.K, 0.06W/m.K, 0.07W/m.K, or a range of values consisting of any two of these. When the coefficient of thermal conductivity of the filler is in the above range, the filler can be made to have good heat insulating performance, and the cost of the filler can be reduced, thereby reducing the manufacturing cost of the battery pack 1. When the thermal conductivity of the filler is lower than 0.012W/m·k, the thermal conductivity is too small and the heat insulating performance is naturally excellent, but the required cost thereof is quite expensive, the manufacturing cost of the battery pack 1 is increased, and when the thermal conductivity of the filler is higher than 0.07W/m·k, the heat insulating effect is weak, and the requirement of blocking the conduction path of heat generated by the out-of-control unit cell when at least one of the first battery cell 10 and the second battery cell 20 is out of heat is not satisfied.
In some embodiments of the application, the filler is an aerogel.
In some embodiments of the present application, the maximum size spacing of the second battery cells 20 along the first direction X is D 1 In mm, referring to FIG. 3, the sub-plate 31 includes a first surface 311 and a second surface 312 opposite to each other in the fourth direction W, and the first surface 311 and the second surface 312 opposite to each other are spaced apart from each other by a distance D between the two sub-plates 31 opposite to each other in the adjacent two liquid cooling plates 30 2 mm, satisfy: d (D) 1 ＜D 2 . Wherein, the maximum size distance D of the second battery cells 20 along the first direction X 1 The second battery cell 20 is clamped relative to the outer wall surface in the first direction X by a vernier caliper to measure the distance between the outer wall surface in the first direction X, and the maximum distance D of the second battery cell 20 along the first direction X is the maximum distance between the measured distances 1 。
Wherein the fourth direction W intersects the plane of the first side wall 11 of the first battery cell 10. In the embodiment shown in fig. 3, the fourth direction W is orthogonal to the plane in which the first side wall 11 of the first battery cell 10 lies. In other embodiments of the present application, the first sidewall 11 is an irregular plane, resulting in a plurality of different planes on the first sidewall 11, the planes being oriented differently, each plane on the first sidewall 11 having a fourth direction W intersecting the plane, i.e., the fourth direction W may be a plurality of different directions.
In some embodiments of the present application, the second battery cell 20 is a cylindrical battery, D 1 For the diameter of the second battery cell 20, when the diameter of the second battery cell 20 is too large, the space between the first battery cell 10 and the second battery cell 20 cannot be effectively utilized due to configuration, and the diameter of the second battery cell 20 is too large, so that the trend of gathering the first battery cell 10 and the second battery cell 20 by the liquid cooling plate 30 is hindered, a plurality of spaces are wasted, the volume utilization rate of the whole battery pack 1 is reduced, the space is effectively utilized, the energy density loss of the battery pack 1 is reduced, and when D 1 And D 2 When the connection is in the above-mentioned relation, a second battery cell 20 can be placed in each accommodating space 131, so that the space occupied by the accommodating space 131 can be better utilized, and the first battery cell 10 and the second battery cell 20 can be firmly connected, so that the volume utilization rate and the safety of the battery pack are both considered.
In some embodiments, 10 < D 1 ＜50，20＜D 2 ＜160。
In other embodiments, 20 < D 1 ＜40，30＜D 2 ＜120。
In some embodiments of the present application, referring to fig. 13, the maximum size of the first battery cell 10 in the third direction Z is H 1 mm, in particular, the first battery cell 10 further comprises a post 161 protruding from the top wall 16, the largest dimension H 1 Is the distance in the third direction Z between the plane of the bottom wall 15 of the first cell 10 and the plane of the face of the post 161 facing away from the top wall 16. Referring to fig. 14, the second battery cell 20 has a size H in the third direction Z 2 mm, satisfy: h is more than or equal to 0.9 2 /H 1 Less than or equal to 1.1, in particular H 2 And H is 1 The ratio of (2) may be 0.92, 0.97, 1.01, 1.05, 1.08 or any two of these. H 2 And H is 1 Is low in ratio ofAt 0.9, or H 2 And H is 1 If the ratio of the first battery cell 10 to the second battery cell 20 is higher than 1.1, the height difference between the first battery cell 10 and the second battery cell 20 is too different, the bus bar for electrically connecting the adjacent battery cells is too large, the difficulty in arrangement and electrical connection between the first battery cell 10 and the second battery cell 20 in the battery pack 1 is increased, and electrical connection failure is easy to occur. H 2 And H is 1 When the ratio of the first battery monomer 10 to the second battery monomer 20 is in the above range, the arrangement difficulty and the electric connection difficulty of the first battery monomer 10 and the second battery monomer 20 are effectively reduced, the assembly convenience of the battery pack 1 is improved, and the electric safety of the battery pack is improved.
In some embodiments of the application, H 2 And H is 1 The ratio of (2) is 1, i.e. the first battery cell 10 is equal to the second battery cell 20, so that the arrangement and the electrical connection of the first battery cell 10 and the second battery cell 20 are facilitated.
In some embodiments, 60.ltoreq.H 1 ≤150，60≤H 2 ≤150。
In some embodiments of the present application, referring to fig. 14, the second battery cell 20 includes a body portion 21 and a connection terminal 22, the body portion 21 extending in the third direction Z, the connection terminal 22 being convexly disposed on a top surface of the body portion 21 in the third direction Z.
In some embodiments, H 2 And H is 1 Including the height of the connecting end 22. Wherein, the distance between the top surface and the bottom surface of the battery unit in the height direction can be measured for a plurality of times by adopting a vernier caliper, and the average value is taken to obtain H 2 Or H 1 。
In some embodiments of the present application, referring to fig. 1 to 5 and 7, two first battery cells 10 adjacent in the second direction Y and a second battery cell 20 between the two first battery cells 10 are connected in series, referring to fig. 5 and 7, one first battery cell 10 is electrically connected to the connection end 22 of the second battery cell 20 through a first connection piece 41, the other first battery cell 10 is electrically connected to the connection end 22 of the second battery cell 20 through a second connection piece 42, and thus a series connection of the three is achieved, and two first battery cells 10 adjacent in the first direction X are connected in series through a third connection piece 43, thereby a series connection between the first battery cell 10 and the second battery cell 20 in the battery pack 1 is achieved.
In some embodiments of the present application, the parallel connection between the first battery cell 10 and the second battery cell 20 may be achieved by changing the connection mode of the connection sheet according to the output voltage requirement of the battery pack 1.
In some embodiments of the present application, a part of the first battery cells 10 and the second battery cells 20 are connected in series, and the other part of the first battery cells 10 and the second battery cells 20 are connected in parallel by changing the connection mode of the connection sheet according to the output voltage requirement of the battery pack 1.
In some embodiments of the present application, the plurality of first battery cells 10 are electrically connected, the electrical connection includes at least one of a series connection and a parallel connection, the plurality of second battery cells 20 are electrically connected, the electrical connection includes at least one of a series connection and a parallel connection, and a specific connection manner of the electrical connection can be specifically selected according to the output voltage requirement of the battery pack 1.
In some embodiments of the present application, a first battery cell 10 and a second battery cell 20 are connected in series to form a battery module, and a plurality of battery modules are electrically connected, wherein the electrical connection includes at least one of a series connection and a parallel connection, and a specific connection manner of the electrical connection can be specifically selected according to an output voltage requirement of the battery pack 1.
In some embodiments of the present application, both the first cell 10 and the second cell 20 are lithium ion batteries.
In some embodiments of the present application, the first battery cell 10 is a lithium ion battery cell and the second battery cell 20 is a sodium ion battery cell.
In some embodiments of the present application, the first battery cell 10 is a ternary lithium battery cell and the second battery cell 20 is a sodium ion battery cell or a lithium iron phosphate battery cell.
In some embodiments of the present application, referring to fig. 9 and 10, a flow channel 33 through which a heat transfer fluid flows is provided in the liquid cooling plate 30, the flow channel 33 penetrating at least a part of the sub-plate 31 in the arrangement direction of the sub-plate 31, and the flow channel 33 penetrating the connection portion 32. The inner flow channel 33 of the liquid cooling plate 30 is opened, heat-conducting fluid can be injected into the liquid cooling plate 30, the liquid cooling plate 30 is in contact with the first side wall 11 or the second side wall 12 of the first battery cell 10, the connecting portion 32 of the liquid cooling plate 30 is in contact with the second battery cell 20, and the liquid cooling plate 30 can regulate the temperature of the first battery cell 10 and the second battery cell 20 (heating up or cooling down) through the heat-conducting fluid in the liquid cooling plate 30, so that the first battery cell 10 and the second battery cell 20 are kept in a proper working temperature range.
In some embodiments of the present application, the inner wall surface of the part of the flow channel 33 penetrating through the connecting portion 32 is arc-shaped, so as to realize smooth connection of the flow channel 33 structures in two adjacent sub-boards 31, so that the flow resistance of the heat conduction fluid flowing in the flow channel 33 is reduced when flowing through the flow channel, the heat exchange rate between the heat conduction fluid and the first battery cell 10 and the second battery cell 20 is improved, and the heat management effect is enhanced.
In some embodiments of the present application, referring to fig. 9 and 10, the liquid cooling plate 30 includes a body and reinforcing ribs 34 disposed on the body, the reinforcing ribs 34 are disposed in the flow channel 33, the flow channel 33 has two inner sidewalls disposed opposite to each other in a direction perpendicular to the first sidewall 11 or the second sidewall 12, and two ends of the reinforcing ribs 34 are connected to the two inner sidewalls of the flow channel 33, respectively. Specifically, the reinforcing ribs 34 are disposed in at least a portion of the sub-boards 31 of each liquid cooling plate 30, the reinforcing ribs 34 are disposed in the sub-boards 31 along the extending direction of the sub-boards 31 in which the reinforcing ribs 34 are disposed, opposite ends of the reinforcing ribs 34 in the first direction X are respectively connected with two inner side walls of the flow channels 33, and the reinforcing ribs 34 in two sub-boards 31 disposed adjacently along the second direction Y may or may not be connected, and are selected according to actual use requirements. The reinforcing ribs 34 play a role in supporting the structure of the liquid cooling plate 30, and the strength of the liquid cooling plate 30 is improved, meanwhile, the space of the flow channel 33 inside the liquid cooling plate 30 is not excessively occupied, and enough space is provided for circulation of heat conduction fluid, so that the strength of the liquid cooling plate and the heat management effect of a battery pack are both considered.
In some embodiments of the present application, referring to fig. 1 to 4, the battery pack 1 further includes: a tank 50, a liquid inlet pipe 60 and a liquid outlet pipe 70.
The plurality of first battery cells 10 and the plurality of second battery cells 20 are accommodated in the box 50 and are carried on the inner bottom wall of the box 50. The first direction X in the present embodiment is parallel to the width direction of the case 50, and the second direction Y is parallel to the length direction of the case 50, so that the internal space of the case 50 can be fully utilized, the internal space utilization rate of the case 50 is improved, and under the condition that the internal space of the case 50 is determined, more first battery cells 10 are installed in the case 50, so that the capacity of the battery pack 1 is improved. In other embodiments, the first direction X may form an angle with the width direction of the case 50, and the second direction Y may form an angle with the length direction of the case 50.
The shape of the case 50 is not limited. The case 50 is not necessary, and in some embodiments, taking a vehicle as an example, that is, the battery pack 1 is installed in a vehicle, the liquid cooling plate 30, the first battery cell 10 and the second battery cell 20 may also be directly installed on a body of the vehicle. In this embodiment, the box 50 is configured to be mounted on a vehicle body of a vehicle, and a length direction or a width direction of the box 50 is parallel to the length direction or the width direction of the vehicle body, where the length direction of the vehicle body is a traveling direction, so that an accommodating space in the length direction of the vehicle body can be fully utilized, an excessive space in the width direction of the vehicle body is avoided, the assembly and the assembly of other components on the vehicle body are facilitated, and the space utilization is improved. It will be appreciated that in other embodiments, the length of the housing 50 may intersect the length or width of the vehicle body, as not limited herein.
The liquid inlet pipe 60 extends along the first direction X, the liquid inlets 35 of the liquid cooling plates 30 are respectively communicated with the liquid inlet pipe 60, one end of the liquid inlet pipe 60 in the first direction X is provided with a liquid supply port 61, the liquid supply port 61 is located outside the box 50, the liquid outlet pipe 70 extends along the first direction X, the liquid inlet pipe 60 and the liquid outlet pipe 70 are arranged at intervals along the second direction Y, the liquid outlets 36 of the liquid cooling plates 30 are respectively communicated with the liquid outlet pipe 70, the liquid inlet pipe 60 and the liquid outlet pipe 70 are respectively communicated through the flow channels 33 in the liquid cooling plates 30, one end of the liquid outlet pipe 70 in the first direction X is provided with a liquid return port 71, and the liquid return port 71 is located outside the box 50. The design of the liquid inlet pipe 60 can be respectively connected with the liquid inlets 35 of the liquid cooling plates 30, heat conduction fluid can be simultaneously injected into the liquid cooling plates 30 through one liquid supply port 61, the liquid outlet pipe 70 is arranged and can be respectively connected with the liquid outlets 36 of the liquid cooling plates 30, and the recovery of the heat conduction fluid in the liquid cooling plates 30 can be realized through one liquid return port 71, so that the circulation of the heat conduction fluid is realized, the utilization rate of the heat conduction fluid is improved, the occupation of excessive space in the box 50 can be avoided, the utilization rate of the space is improved, and the thermal management of the first battery cells 10 and the second battery cells 20 in the battery pack 1 can be realized.
Examples 1 to 4 are as follows:
a battery pack, comprising:
the box 50, the box 50 is provided with a containing cavity, 88 first battery monomers 10, 77 second battery monomers 20 and 12 liquid cooling plates 30 which are arranged at intervals along a first direction X in the containing cavity of the box 50, each liquid cooling plate 30 comprises 8 sub-plates 31 which are arranged along a second direction Y and connected, the sub-plates 31 of one liquid cooling plate 30 and the sub-plates 31 of the other liquid cooling plate 30 are oppositely arranged and define the containing cavity, and one first battery monomer 10 is arranged in the containing cavity; wherein the first battery cell 10 is connected with the adjacent sub-board 31; along the second direction Y, an accommodating space 131 is formed between two adjacent first battery cells 10, a second battery cell 20 is disposed in the accommodating space 131, and the volume of the first battery cell 10 is larger than that of the second battery cell 20.
The maximum dimension of the first battery cell 10 in the third direction Z is H 1 mm, the maximum dimension of the second battery cell 20 in the third direction Z is H 2 mm. The above examples were subjected to vibration testing according to GB38031 2020.
The test results were as follows:
| examples | H 1 | H 2 | H 2 /H 1 | Test results |
| Example 1 | 82 | 82 | 1.000 | By passing through |
| Example 2 | 62 | 68 | 1.097 | By passing through |
| Example 3 | 140 | 136 | 0.971 | By passing through |
| Example 4 | 75 | 68 | 0.907 | By passing through |
From the above results, all examples were able to pass after vibration testing.
The foregoing has outlined the detailed description of the embodiments of the present application, and the detailed description of the principles and embodiments of the present application is provided herein by way of example only to facilitate the understanding of the method and core concepts of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (13)
1. A battery pack, comprising:
a plurality of first battery cells (10);
a plurality of second battery cells (20);
the liquid cooling plates (30) are arranged at intervals along the first direction (X), each liquid cooling plate (30) comprises a plurality of sub-plates (31) which are arranged along the second direction (Y) and are connected with each other, and the sub-plates (31) of one liquid cooling plate (30) and the sub-plates (31) of the other liquid cooling plate (30) are arranged oppositely to define a containing cavity, and at least one first battery cell (10) is arranged in the containing cavity;
The first battery unit (10) is connected with the daughter board (31);
along second direction (Y), have accommodation space (131) between two adjacent first battery monomer (10), be provided with in accommodation space (131) at least one second battery monomer (20), the volume of first battery monomer (10) is greater than the volume of second battery monomer (20).
2. The battery pack according to claim 1, wherein the first battery cells (10) include oppositely disposed side walls, adjacent ones of the side walls of the first battery cells (10) defining the receiving space (131), the first battery cells (10) having a thickness direction along which the first battery cells (10) have opposite first (1311) and second ends (1312); -in the second direction (Y), the dimension between the second ends (1312) of adjacent first cells (10) is greater than the dimension between the first ends (1311);
the second cell (20) is disposed adjacent the second end (1312).
3. A battery pack according to claim 2, wherein, along said second direction (Y), at least part of two of said sub-plates (31) arranged adjacently have an angle α therebetween, said angle α having an arc of θrad satisfying: 0 < theta < pi.
4. The battery pack according to claim 1, wherein the first battery cell (10) includes a first side wall (11) and a second side wall (12) disposed opposite to each other, and the first side wall (11) and/or the second side wall (12) are/is a surface having a largest surface area;
at least one of the first side wall (11) and the second side wall (12) is connected with the adjacent daughter board (31).
5. The battery pack according to claim 1, wherein the first battery cell (10) further comprises a third side wall (13) and a fourth side wall (14) disposed opposite to each other, and the second battery cell (20) is connected to at least one of the fourth side wall (14) and the third side wall (13); the outer wall surface of the second battery monomer (20) contacted with the third side wall (13) is a cambered surface;
and/or the outer wall surface of the second battery unit (20) contacted with the fourth side wall (14) is an arc surface.
6. The battery pack according to claim 1, wherein a filler is further provided in the accommodating space (131), the filler being connected to at least one of the first battery cell (10) and the second battery cell (20);
the heat conductivity of the filler is 0.012W/mK-0.07W/mK.
7. The battery pack according to claim 1, wherein the second battery cell (20) has a maximum dimension D in the first direction (X) 1 mm；
The sub-board (31) comprises a first surface (311) and a second surface (312) which are opposite to each other in the fourth direction (W), and in two of the sub-boards (31) which are opposite to each other in two adjacent liquid cooling boards (30), the distance between the first surface (311) and the second surface (312) which are opposite to each other in the fourth direction (W) is D 2 mm, satisfy: d (D) 1 ＜D 2 ；
The fourth direction (W) intersects a plane in which the first side wall (11) is located.
8. The battery pack according to claim 1, wherein the second battery cell (20) is a cylindrical battery;
the first battery unit (10) is a square battery.
9. The battery pack according to claim 1, wherein the first battery cell (10) has a maximum dimension H in the third direction (Z) 1 mm, the maximum dimension of the second battery cell (20) in the third direction (Z) is H 2 mm, satisfy: h is more than or equal to 0.9 2 /H 1 And the third direction (Z) is intersected with the first direction (X) and the second direction (Y) in pairs which are less than or equal to 1.1.
10. The battery pack of claim 1, further comprising a connection tab through which the first cell (10) and the second cell (20) are electrically connected, the electrical connection comprising at least one of series and parallel.
11. The battery pack according to claim 1, further comprising a connection tab through which a plurality of the first battery cells (10) are electrically connected, and a plurality of the second battery cells (20) are electrically connected through which the electrical connection includes at least one of series connection and parallel connection.
12. The battery pack according to claim 1, further comprising a connection sheet through which one of the first battery cells (10) and one of the second battery cells (20) are connected in series to form one battery module, a plurality of the battery modules being electrically connected through the connection sheet, the electrical connection including at least one of series connection and parallel connection.
13. An electric vehicle comprising the battery pack according to any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321638970.5U CN220138455U (en) | 2023-06-26 | 2023-06-26 | Battery pack and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321638970.5U CN220138455U (en) | 2023-06-26 | 2023-06-26 | Battery pack and electric automobile |
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| Publication Number | Publication Date |
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| CN220138455U true CN220138455U (en) | 2023-12-05 |
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| CN202321638970.5U Active CN220138455U (en) | 2023-06-26 | 2023-06-26 | Battery pack and electric automobile |
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| CN (1) | CN220138455U (en) |
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