CN221551943U - Secondary battery, battery pack, and vehicle - Google Patents
Secondary battery, battery pack, and vehicle Download PDFInfo
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- CN221551943U CN221551943U CN202323197939.5U CN202323197939U CN221551943U CN 221551943 U CN221551943 U CN 221551943U CN 202323197939 U CN202323197939 U CN 202323197939U CN 221551943 U CN221551943 U CN 221551943U
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- secondary battery
- battery cell
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- 238000009826 distribution Methods 0.000 abstract description 9
- 239000003792 electrolyte Substances 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 2
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 description 2
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- 229910010710 LiFePO Inorganic materials 0.000 description 1
- 229910015014 LiNiCoAlO Inorganic materials 0.000 description 1
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
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- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 description 1
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- Battery Mounting, Suspending (AREA)
Abstract
The application relates to a secondary battery, a battery pack and a carrier, wherein the secondary battery comprises a battery core and a shell, and the battery core comprises a positive plate, a diaphragm and a negative plate which are stacked along a third direction; the shell comprises two first cover plates and two second cover plates, the two first parallel sides of the battery cell are arranged along the first cover plates, and the two second parallel sides of the battery cell are arranged along the second cover plates; wherein the length of the secondary battery in the first direction is L, the width of the secondary battery in the second direction is W, the thickness of the secondary battery in the third direction is H, L/H is more than or equal to 20, and W/H is more than or equal to 15. In the secondary battery, the length and the thickness of the secondary battery meet the relation of L/H more than or equal to 20, and the width and the thickness of the secondary battery meet the relation of W/H more than or equal to 15, namely the secondary battery is arranged into a flat large flat plate structure, the volume energy density of the battery pack can be greatly improved, the current distribution is optimized, the temperature rise of the battery core is restrained, the temperature distribution of the battery core is uniform, and the power output capability is improved.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a secondary battery, a battery pack and a carrier.
Background
The lithium ion battery is used as a novel secondary battery, has the advantages of high energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large energy storage, transportation, power supply and the like. Lithium ion batteries are being developed towards a high lifetime, high safety, high magnification and low cost as green and environment-friendly new energy sources.
In the related art, the lithium ion battery needs to meet the needling requirement in the structural and system design, namely, a steel nail with a certain diameter is used for vertically piercing the center of the battery core, and the needling requirement is met without firing or explosion. Therefore, the blade battery appears, and the thin and long blade battery has been widely put into the market, and the blade battery has the advantages of good heat radiation capability, high safety performance, no open flame or smoke during needling, and difficult thermal runaway; the space is also saved, the modules can be skipped when the modules are grouped, the volume utilization rate is greatly improved, and more battery cells are arranged in the same space. Compared with the traditional battery pack, the volume utilization rate of the blade battery is improved by more than 50%, and the endurance mileage of the blade battery is greatly improved.
However, the heat transfer of the battery cells cannot effectively control the temperature difference of the blade battery, and thus the battery temperature distribution is uneven.
Disclosure of utility model
Based on this, it is necessary to provide a secondary battery, a battery pack and a vehicle, which solve the problem that the temperature difference of the blade battery cannot be effectively controlled due to heat transfer of the battery cell, resulting in uneven temperature distribution of the battery.
The first aspect of the application provides a secondary battery, which comprises a battery cell and a shell, wherein the battery cell comprises a positive plate, a diaphragm and a negative plate which are stacked; the shell comprises two first cover plates which are oppositely arranged along a first direction, two second cover plates which are oppositely arranged along a second direction, two first parallel sides of the battery cell are arranged along the first cover plates, two second parallel sides of the battery cell are arranged along the second cover plates, and the positive plate, the diaphragm and the negative plate are stacked along a third direction; wherein the length of the secondary battery in the first direction is L, the width of the secondary battery in the second direction is W, the thickness of the secondary battery in the third direction is H, L/H is more than or equal to 20, and W/H is more than or equal to 15; the first direction, the second direction and the third direction are perpendicular to each other.
In one embodiment, the length of the secondary battery is in the range of 400 mm.ltoreq.L.ltoreq.3000 mm, and the width of the secondary battery is in the range of 300 mm.ltoreq.W.ltoreq.2000 mm.
In one embodiment, the side edge of the positive plate is provided with a positive electrode lug, the length range of the positive electrode lug is L/4-L, the width range of the positive electrode lug is W/4-W, the side edge of the negative plate is provided with a negative electrode lug, the length range of the negative electrode lug is L/4-L, the width range of the positive electrode lug is W/4-W, and the side edge of the battery cell corresponding to the positive electrode lug is different from the side edge of the battery cell corresponding to the negative electrode lug.
In one embodiment, the positive electrode tab is connected to the first cover plate or the second cover plate corresponding to the side edge where the positive electrode tab is located, and the negative electrode tab is connected to the first cover plate or the second cover plate corresponding to the side edge where the negative electrode tab is located.
In one embodiment, the housing further comprises two sealing plates arranged on two sides of the battery cell along the third direction, and at least one of the first cover plate, the second cover plate and the sealing plates is provided with a liquid injection hole.
A second aspect of the present application provides a battery pack including a battery cell, which is the secondary battery of any one of the above embodiments, and a case; the shell comprises a bearing bottom plate, two first frames extending along a first direction and two second frames extending along a second direction; wherein, the single battery bears on bearing bottom plate, and the single battery's length direction is arranged along first frame, and single battery's width direction is arranged along the second frame, and single battery's direction of height is arranged along the third direction.
In one embodiment, the number of stacks of battery cells in the third direction is 4-10.
In one embodiment, the sum of the volumes of the battery cells is V1, the volume of the battery pack is V0, and V1/V0 is more than or equal to 0.7.
A third aspect of the present application provides a vehicle on which the battery pack according to any one of the above embodiments is mounted, wherein the first frame of the battery pack is disposed parallel or perpendicular to the longitudinal direction of the vehicle, and the second frame of the battery pack is disposed parallel or perpendicular to the longitudinal direction of the vehicle.
In one embodiment, the number of battery packs mounted on the vehicle is 1 or more.
In the secondary battery, the length and the thickness of the secondary battery meet the relation of L/H more than or equal to 20, and the width and the thickness of the secondary battery meet the relation of W/H more than or equal to 15, namely the secondary battery is arranged into a flat large flat plate structure, the volume energy density of the battery pack can be greatly improved, the current distribution is optimized, the temperature rise of the battery core is restrained, the temperature distribution of the battery core is uniform, and the power output capability is improved.
Drawings
Fig. 1 is a schematic view of a battery pack mounted on a mounting surface according to an embodiment of the present application.
Fig. 2 is a schematic diagram of connection between a battery cell and a first cover plate and a second cover plate according to an embodiment of the application.
Fig. 3 is a schematic view of a housing according to an embodiment of the application.
Fig. 4 is a schematic diagram of a stacked cell according to an embodiment of the application.
Fig. 5 is a schematic diagram of a stacked cell according to another embodiment of the present application.
Fig. 6 is a schematic diagram of connection between a battery cell and a first cover plate and a second cover plate according to another embodiment of the application.
The reference numerals are: the battery pack 1, the mounting surface 2, the housing 10, the battery cell 20, the battery cell 21, the positive electrode plate 211, the positive electrode tab 211a, the separator 212, the negative electrode plate 213, the negative electrode tab 213a, the case 22, the first cover plate 221, the second cover plate 222, and the liquid filling hole 223.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, if any, 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 at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. 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, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
An embodiment of the present application provides a vehicle for carrying a person or object, for example, the vehicle may be a vehicle. The vehicle is provided with a battery pack 1, and the battery pack 1 is used for supplying power to the vehicle. In some embodiments, the number of battery packs 1 mounted on the vehicle is 1 or more.
Referring to fig. 1, a battery pack 1 includes a case 10 and battery cells 20. The battery cell 20 is accommodated inside the case 10, and the case 22 serves to protect the battery cell 20 from external force. The housing 10 includes a load floor, two first rims, and two second rims. The battery cell 20 is disposed on a carrying base plate, and the carrying base plate is used for carrying the battery cell 20. The first frame extends along a first direction, the two first frames are parallel to each other and are arranged oppositely, the second frame extends along a second direction, and the two second frames are parallel to each other and are arranged oppositely. Further, the length direction of the battery cells 20 is arranged along the first frame, the width direction of the battery cells 20 is arranged along the second frame, the height direction of the battery cells 20 is arranged along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.
The vehicle includes a mounting surface 2, the mounting surface 2 being for mounting the battery pack 1. Specifically, the first frame setting direction is parallel or perpendicular to the length direction of the carrier, the second frame setting direction of the battery pack 1 is parallel or perpendicular to the length direction of the carrier, and the load-bearing bottom plate is used for being connected with the mounting surface 2 so as to realize the mounting of the battery pack 1 and the carrier.
When the number of the battery packs 1 is 1, the size of the carrying floor of the battery pack 1 matches the size of the mounting surface 2 on the vehicle. In the disclosed embodiment of the application, "the load floor matches the mounting surface 2" can be interpreted as: the area of the load floor is equal to or slightly smaller than the area of the mounting surface 2.
In some embodiments, the battery cells 20 are provided in plurality, for example, the battery cells 20 may be provided in 4 to 10, and 4 to 10 battery cells 20 are sequentially stacked in the third direction. In the embodiment disclosed by the application, each of the battery cells 20 is parallel to each other and to the mounting surface 2, and the battery cells 20 are arranged parallel to the mounting surface 2 of the carrier, namely, the battery cells 20 are arranged on the carrier in a lying manner, when the foreign matters horizontally penetrate into the battery cells 21 along the advancing direction of the vehicle, the foreign matters are relatively parallel to the battery cells 20, so that heat accumulation is not easy to cause, and the risk of short circuit caused by the penetration of the foreign matters by the battery cells 20 can be effectively reduced.
In some embodiments, the sum of the volumes of the plurality of battery cells 20 is V1, the volume of the battery pack 1 is V0, and the relationship between the sum of the volumes of the battery cells 20 and the volume of the battery pack 1 is satisfied: V1/V0.gtoreq.0.7, for example, V1/V0 may be 0.7, 0.75, 0.8, 0.85, 0.9, etc., preferably V1/V0.gtoreq.0.8.
An embodiment of the present application further provides a secondary battery, and it is understood that in the embodiment disclosed in the present application, the secondary battery is the battery cell 20, and for the sake of uniform reference, the secondary battery will be described below by the name of the battery cell 20. The length of the battery cell 20 in the first direction is L, the width in the second direction is W, the thickness in the third direction is H, and the relationship between the length and thickness of the battery cell 20 is satisfied: L/H is more than or equal to 20, and the width and the thickness of the secondary battery satisfy the relation: W/H is more than or equal to 15. Through the size limitation, the battery unit 20 can be arranged to be in a flat large flat plate structure, the volume energy density of the battery pack 1 can be greatly improved, the current distribution is optimized, the temperature rise of the battery cell 21 is restrained, the temperature distribution of the battery cell 21 is uniform, and the power output capability is improved.
In some embodiments, it is preferred that the length of the battery cell 20 ranges from 400 mm.ltoreq.L.ltoreq.3000 mm, and the width of the battery cell 20 ranges from 300 mm.ltoreq.W.ltoreq.2000 mm.
Specifically, referring to fig. 2 and 3, the battery cell 20 includes a cell 21 and a case 22. The battery cell 21 is disposed inside the housing 22, and in some embodiments, an aluminum case may be used as the housing 22 of the battery cell 21, and the housing 22 is used to protect the battery cell 21 from external force. The housing 22 includes two first cover plates 221 and two second cover plates 222, the two first cover plates 221 are parallel to each other and are oppositely arranged along the first direction, the two second cover plates 222 are parallel to each other and are oppositely arranged along the second direction, the two first parallel sides of the battery cell 21 are arranged along the first cover plates 221, and the two second parallel sides of the battery cell 21 are arranged along the second cover plates 222.
Referring to fig. 4 and 5, the battery cell 21 includes a positive electrode tab 211, a separator 212, and a negative electrode tab 213, and the positive electrode tab 211, the separator 212, and the negative electrode tab 213 are stacked in the third direction. The side edge of the positive plate 211 is provided with a positive electrode lug 211a, the length range of the positive electrode lug 211a is L/4-L, and the width range of the positive electrode lug 211a is W/4-W; the side edge of the negative electrode plate 213 is provided with a negative electrode lug 213a, the length range of the negative electrode lug 213a is L/4-L, and the width range of the negative electrode lug 213a is W/4-W; the size of the tab reaches 1/4 or more of the side size of the pole piece, namely, the positive tab 211a and the negative tab 213a are ultra-long tabs, and the arrangement can improve the volume energy density of the secondary battery and optimize the current distribution.
The side of the battery cell 21 corresponding to the positive electrode tab 211a is different from the side of the battery cell 21 corresponding to the negative electrode tab 213a, and in the embodiment disclosed in the present application, the scheme can be understood as follows: the positive electrode tab 211a and the negative electrode tab 213a respectively correspond to different sides of the battery cell 21, or the positive electrode tab 211a and the negative electrode tab 213a correspond to different positions of the same battery cell 21 side. Further, the sides defining the positive electrode tab 211 and the negative electrode tab 213 describe the positive electrode tab 211a and the negative electrode tab 213 a. Specifically, the positive electrode tab 211 includes a first side, a second side, a third side, and a fourth side that are sequentially connected end to end, the negative electrode tab 213 includes a fifth side, a sixth side, a seventh side, and an eighth side that are sequentially connected end to end, the first side and the fifth side correspond to the same side of the cell 21, the second side and the sixth side correspond to the same side of the cell 21, the third side and the seventh side correspond to the same side of the cell 21, and the fourth side and the eighth side correspond to the same side of the cell 21.
As shown in fig. 4, in some embodiments, the positive electrode tab 211a may be formed at the first and second sides, and the negative electrode tab 213a may be formed at the seventh and eighth sides. In this embodiment, after the positive electrode tab 211 and the negative electrode tab 213 are laminated, the positive electrode tab 211a located on the first side and the second side of the positive electrode tab 211 and the negative electrode tab 213a located on the seventh side and the seventh side of the negative electrode tab 213a are not overlapped, i.e. the side of the battery cell 21 corresponding to the tab is different from the side of the battery cell 21 corresponding to the negative electrode tab 213a.
As shown in fig. 5, in other embodiments, the positive electrode tab 211a may be formed at each of the first, second, third, and fourth sides, and the negative electrode tab 213a may be formed at each of the fifth, sixth, seventh, and eighth sides. In this embodiment, after the positive electrode tab 211 and the negative electrode tab 213 are laminated, the positive electrode tab 211a of the first side and the negative electrode tab 213a of the fifth side correspond to the same side of the battery cell 21, the positive electrode tab 211a of the second side and the negative electrode tab 213a of the sixth side correspond to the same side of the battery cell 21, the positive electrode tab 211a of the third side and the negative electrode tab 213a of the seventh side correspond to the same side of the battery cell 21, and the positive electrode tab 211a of the fourth side and the negative electrode tab 213a of the eighth side correspond to the same side of the battery cell 21. Meanwhile, the positive electrode tab 211a and the negative electrode tab 213a on the same side of the battery cell 21 are spaced apart, so that the positive electrode tab 211a and the negative electrode tab 213a on the same side of the battery cell 21 are not overlapped with each other, i.e., the positive electrode tab 211a and the negative electrode tab 213a correspond to different positions on the same side of the battery cell 21.
The positive electrode tab 211a is connected to the first cover plate 221 or the second cover plate 222 corresponding to the side edge where the positive electrode tab 213a is connected to the first cover plate 221 or the second cover plate 222 corresponding to the side edge where the negative electrode tab 213a is located. Specifically, in the embodiment shown in fig. 4, after the positive electrode tab 211 and the negative electrode tab 213 are laminated, the positive electrode tabs 211a of the first side and the second side are respectively connected to the first cover plate 221 and the second cover plate 222, and the negative electrode tabs 213a of the seventh side and the eighth side are respectively connected to the other first cover plate 221 and the other second cover plate 222 (see fig. 2). In the embodiment shown in fig. 5, after the positive electrode tab 211 and the negative electrode tab 213 are laminated, the positive electrode tab 211a on the first side and the negative electrode tab 213a on the fifth side are connected to the first cover plate 221, the positive electrode tab 211a on the second side and the negative electrode tab 213a on the sixth side are connected to the second cover plate 222, the positive electrode tab 211a on the third side and the negative electrode tab 213a on the seventh side are connected to the other first cover plate 221, and the positive electrode tab 211a on the fourth side and the negative electrode tab 213a on the eighth side are connected to the other second cover plate 222 (as shown in fig. 6).
For the battery cell 21 with the tab arranged on only one side, current is concentrated and distributed on one side of the battery cell 21 in the use process, so that the temperature of one side of the battery cell 21 is higher than that of other parts, and long-term use of the battery cell 21 is not facilitated. In the case of the application, the single battery is set to be in a large flat plate flat structure, the single-side lugs can cause more heat aggregation of the battery cell 21, and the four sides of the battery cell 21 are formed into the lugs, so that the current can be uniformly distributed, thereby avoiding overhigh temperature of the single side of the battery cell 21 and prolonging the service life of the battery cell 21.
In the embodiment disclosed in the present application, the positive electrode tab 211a and the negative electrode tab 213a may be connected to the first cover plate 221 and the second cover plate 222 by ultrasonic or laser roll welding.
The first cover plate 221 and the second cover plate 222 are respectively provided with a pole, and each pole comprises a positive pole and a negative pole, the positive pole is connected with the positive pole lug 211a, the negative pole is connected with the negative pole lug 213a, and the positive pole and the negative pole are used for conducting currents outside and inside the single battery so as to supply power for an external carrier.
The first cover plate 221 and the second cover plate 222 are provided with explosion-proof components. The explosion-proof assembly comprises an explosion-proof valve and a protection piece, and can ensure the tightness of the first cover plate 221, the second cover plate 222 and the battery cell 21, and meanwhile, the explosion-proof assembly also plays an explosion-proof role. Taking the first cover plate 221 as an example, explosion-proof holes are formed in the first cover plate 221, the explosion-proof holes are located between the positive pole and the negative pole, and the explosion-proof valves and the protection pieces are arranged in the explosion-proof holes at intervals. Specifically, the explosion-proof valve is arranged on the side surface of the explosion-proof hole, which is close to the battery cell 21, and can be naturally opened for pressure relief under the condition that the internal pressure of the battery cell 20 is overlarge, so that the explosion of the battery cell 21 is prevented, and the use safety of the battery cell 20 is ensured; further, the explosion-proof valve is configured to be able to be exploded, when the temperature of the gas inside the battery cell 20 is overheated or the gas pressure is too high, the explosion-proof valve is able to be exploded, an exhaust port is formed at the explosion-proof hole, and the inside of the battery cell 20 is timely subjected to air discharge and pressure relief. Further, the explosion-proof valve can also prevent electrolyte from overflowing from the explosion-proof hole. The protection piece is arranged on the side surface of the explosion-proof hole away from the battery core 21, and can prevent foreign objects from extruding the explosion-proof valve and prevent the explosion-proof valve from being polluted by external environment.
The housing 22 further includes two sealing plates that are parallel to each other and are disposed opposite each other in the third direction. It will be appreciated that the two sealing plates, the two first cover plates 221 and the two second cover plates 222 form a receiving space therebetween for receiving the battery cells 2. Further, at least one of the first cover plate 221, the second cover plate 222, and the sealing plate is provided with a filling hole 223, as shown in fig. 3, in the embodiment of the disclosure, the filling hole 223 is disposed on the sealing plate, and the filling hole 223 is used for filling the electrolyte into the housing 22. The electrolyte infiltration is difficult because the size of the secondary battery is great, and the electrolyte injection efficiency of the electric core 21 and the electrolyte infiltration efficiency can be improved by providing a plurality of electrolyte injection holes 223 on the sealing plate.
The positive electrode tab 211 includes a positive electrode active material and a positive electrode current collector, and the negative electrode tab 213 includes a negative electrode active material and a negative electrode current collector.
The placement of the positive electrode active material is not limited, and in some embodiments, the positive electrode active material includes, but is not limited to: one or more of lithium cobalt oxide (LiCoO), lithium nickel cobalt manganese oxide (LiNixMnyCo-x-yO, abbreviated as NMC), lithium nickel cobalt aluminate (LiNiCoAlO, abbreviated as NCA), lithium manganese oxide (LiMnO), lithium manganese iron phosphate (LiMnxFe-xPO, abbreviated as LMFP), lithium vanadium phosphate (LiV (PO)), lithium vanadyl phosphate (LiVOPO), lithium iron phosphate (LiFePO), lithium titanate (LiTiO), and lithium-rich manganese-based materials.
The placement of the anode active material is not limited, and in some embodiments, the anode active material includes one or more of graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate.
In some embodiments, the metal foil employed for the positive current collector may be aluminum foil.
In some embodiments, the metal foil employed for the negative electrode current collector may be copper foil.
In some embodiments, the septum 212 includes, but is not limited to: polyethylene films, polypropylene films, polyvinylidene fluoride films, and multilayer composite films composed of the above materials.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A secondary battery, characterized by comprising:
The battery cell comprises a positive plate, a diaphragm and a negative plate which are stacked; and
The battery pack comprises a shell, a battery cell and a separator, wherein the shell comprises two first cover plates which are oppositely arranged along a first direction and two second cover plates which are oppositely arranged along a second direction, the two first parallel sides of the battery cell are arranged along the first cover plates, the two second parallel sides of the battery cell are arranged along the second cover plates, and the positive plate, the separator and the negative plate are stacked along a third direction;
The length of the secondary battery in the first direction is L, the width of the secondary battery in the second direction is W, the thickness of the secondary battery in the third direction is H, L/H is more than or equal to 20, and W/H is more than or equal to 15; the first direction, the second direction and the third direction are perpendicular to each other.
2. The secondary battery according to claim 1, wherein the length of the secondary battery ranges from 400mm to L to 3000mm, and the width of the secondary battery ranges from 300mm to W to 2000mm.
3. The secondary battery according to claim 1, wherein a positive tab is formed on a side of the positive electrode tab, a length of the positive tab ranges from L/4 to L, a width of the positive tab ranges from W/4 to W, a negative tab is formed on a side of the negative electrode tab, a length of the negative tab ranges from L/4 to L, a width of the negative tab ranges from W/4 to W, and a side of the battery cell corresponding to the positive tab is different from a side of the battery cell corresponding to the negative tab.
4. The secondary battery according to claim 3, wherein the positive tab is connected to the first cover plate or the second cover plate corresponding to the side thereof, and the negative tab is connected to the first cover plate or the second cover plate corresponding to the side thereof.
5. The secondary battery according to any one of claims 1 to 4, wherein the case further includes two sealing plates disposed on both sides of the battery cell in the third direction, and at least one of the first cover plate, the second cover plate, and the sealing plates is provided with a liquid injection hole.
6. A battery pack, comprising:
A battery cell, which is the secondary battery according to any one of claims 1 to 5; and
The shell comprises a bearing bottom plate, two first frames and two second frames, wherein the two first frames are arranged along the first direction in an extending mode, and the two second frames are arranged along the second direction in an extending mode;
The battery unit is borne on the bearing bottom plate, the length direction of the battery unit is arranged along the first frame, the width direction of the battery unit is arranged along the second frame, and the height direction of the battery unit is arranged along the third direction.
7. The battery pack according to claim 6, wherein the number of stacks of the battery cells in the third direction is 4-10.
8. The battery pack according to claim 6, wherein the sum of volumes of the battery cells is V1, the volume of the battery pack is V0, and V1/V0 is not less than 0.7.
9. A vehicle on which the battery pack according to any one of claims 6 to 8 is mounted, wherein a first frame of the battery pack is disposed parallel or perpendicular to a longitudinal direction of the vehicle, and a second frame of the battery pack is disposed parallel or perpendicular to the longitudinal direction of the vehicle.
10. The vehicle of claim 9, wherein the number of battery packs mounted on the vehicle is 1 or more.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323197939.5U CN221551943U (en) | 2023-11-27 | 2023-11-27 | Secondary battery, battery pack, and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323197939.5U CN221551943U (en) | 2023-11-27 | 2023-11-27 | Secondary battery, battery pack, and vehicle |
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| CN221551943U true CN221551943U (en) | 2024-08-16 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120341388A (en) * | 2025-06-09 | 2025-07-18 | 杭州华宇新能源研究院有限公司 | A lead-acid battery with uniform acidity |
| CN120357051A (en) * | 2025-06-09 | 2025-07-22 | 杭州华宇新能源研究院有限公司 | Lead-acid storage battery with thin polar plate |
| CN120376774A (en) * | 2025-06-09 | 2025-07-25 | 杭州华宇新能源研究院有限公司 | Single lead-acid storage battery |
| CN120389128A (en) * | 2025-06-09 | 2025-07-29 | 杭州华宇新能源研究院有限公司 | A pole group head of a single lead-acid battery |
| CN120389127A (en) * | 2025-06-09 | 2025-07-29 | 杭州华宇新能源研究院有限公司 | Lead-acid battery with polymer membrane |
| CN120389125A (en) * | 2025-06-09 | 2025-07-29 | 杭州华宇新能源研究院有限公司 | A combined single lead-acid battery |
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- 2023-11-27 CN CN202323197939.5U patent/CN221551943U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120341388A (en) * | 2025-06-09 | 2025-07-18 | 杭州华宇新能源研究院有限公司 | A lead-acid battery with uniform acidity |
| CN120357051A (en) * | 2025-06-09 | 2025-07-22 | 杭州华宇新能源研究院有限公司 | Lead-acid storage battery with thin polar plate |
| CN120376774A (en) * | 2025-06-09 | 2025-07-25 | 杭州华宇新能源研究院有限公司 | Single lead-acid storage battery |
| CN120389128A (en) * | 2025-06-09 | 2025-07-29 | 杭州华宇新能源研究院有限公司 | A pole group head of a single lead-acid battery |
| CN120389127A (en) * | 2025-06-09 | 2025-07-29 | 杭州华宇新能源研究院有限公司 | Lead-acid battery with polymer membrane |
| CN120389125A (en) * | 2025-06-09 | 2025-07-29 | 杭州华宇新能源研究院有限公司 | A combined single lead-acid battery |
| CN120389125B (en) * | 2025-06-09 | 2025-09-05 | 杭州华宇新能源研究院有限公司 | Combined single lead-acid storage battery |
| CN120389128B (en) * | 2025-06-09 | 2025-09-09 | 杭州华宇新能源研究院有限公司 | Pole group head of single lead-acid storage battery |
| CN120389127B (en) * | 2025-06-09 | 2025-09-09 | 杭州华宇新能源研究院有限公司 | Lead-acid battery with polymer membrane |
| CN120357051B (en) * | 2025-06-09 | 2025-09-26 | 杭州华宇新能源研究院有限公司 | A lead-acid battery with thin plates |
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