CN115152082A - Battery case, battery and power consumption device - Google Patents
Battery case, battery and power consumption device Download PDFInfo
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- CN115152082A CN115152082A CN202180015025.7A CN202180015025A CN115152082A CN 115152082 A CN115152082 A CN 115152082A CN 202180015025 A CN202180015025 A CN 202180015025A CN 115152082 A CN115152082 A CN 115152082A
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- battery
- casing
- bottom wall
- case
- reinforcement
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- 230000002787 reinforcement Effects 0.000 claims abstract description 47
- 230000003014 reinforcing effect Effects 0.000 claims description 80
- 239000003351 stiffener Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 11
- 239000000243 solution Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M50/134—Hardness
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The application provides a battery case, battery and power consumption device relates to energy storage technical field, and this battery case includes casing and closing cap at the open-ended top cap of casing, is used for placing electric core in the casing, is provided with the reinforcement on the diapire of casing, and the reinforcement deviates from the one end and the top cap connection of the diapire of casing. This application is through setting up the reinforcement in the casing, the one end of reinforcement is connected with one of them in the diapire of casing and the top cap, the other end of reinforcement passes electric core and the diapire of casing and another in the top cap is connected, when the battery case receives the gaseous impact of the electric core release that is located in the battery case like this, be located the reinforcement between the diapire of casing and the top cap, can apply opposite effort for the diapire of casing and top cap, prevent that the casing from taking place to warp, with the intensity that improves the casing, and then improve the security performance of battery.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to a battery shell, a battery and an electric device.
Background
The battery is a device that turns into chemical energy electric energy, by fields such as wide application in new energy automobile, energy storage power station, and the battery includes the battery case usually and sets up the electric core in the battery case, and electric core can release a large amount of heats and gas at the in-process of charging and discharging, if this gas can not in time discharge the battery case, can cause the impact to the battery case, causes the battery case to take place the bulging deformation, reduces the security performance of battery.
Disclosure of Invention
In view of the above problems, embodiments of the present application provide a battery case, a battery and an electric device, which are used for improving the strength of the battery case and further improving the safety performance of the battery.
In order to achieve the above object, the embodiments of the present application provide the following technical solutions:
a first aspect of the embodiments of the present application provides a battery case, including a casing and a top cover covering an opening of the casing, be used for placing electric core in the casing, be provided with a reinforcement in the casing, one end of reinforcement with the diapire of casing with one of the top cover is connected, the other end of reinforcement passes electric core and with the diapire of casing with another one of the top cover is connected.
In this embodiment, the reinforcement that is located between the diapire of casing and top cap can apply opposite effort for the diapire of casing and top cap, prevents that the casing from taking place to be out of shape to improve the intensity of casing, and then improve the security performance of battery.
In some embodiments, one end of the stiffener is disposed in a central region of the bottom wall of the housing.
In some embodiments, the number of stiffeners is at least one.
In some embodiments, the stiffener is one and is disposed at a center of a bottom wall of the housing.
In some embodiments, one of the stiffeners is disposed at the center of the bottom wall of the housing, and the remaining stiffeners are spaced apart along a first annular track having a center coincident with the center of the bottom wall of the housing.
In some embodiments, a plurality of the stiffeners are spaced along a second annular track, the center of the second annular track coinciding with the center of the bottom wall of the shell;
the plurality of the reinforcing parts are arranged at intervals along a third annular track, the center of the third annular track is superposed with the center of the second annular track, and the diameter of the third annular track is larger than that of the second annular track.
In some embodiments, the cross-sectional shape of the stiffener is polygonal in a cross-section taken in a plane parallel to the bottom wall of the housing.
In some embodiments, the cross-sectional shape of the stiffener is annular.
In some embodiments, the stiffener has a diameter of 0.5mm to 3mm.
In some embodiments, the material of the stiffener comprises stainless steel or aluminum.
In some embodiments, an insulating layer is disposed on an outer surface of the stiffener.
A second aspect of the embodiments of the present application provides a battery, including a battery core and the battery case in the above embodiments, where the battery core is disposed in the battery case.
In some embodiments, a through hole corresponding to the reinforcing member is provided in the battery cell, and the through hole facilitates the penetration of the reinforcing member.
In some embodiments, one end of the reinforcing member is fixedly connected to the bottom wall of the housing, and the other end of the reinforcing member passes through the through hole and is fixedly connected to the top cover.
In some embodiments, one end of the reinforcement is welded to the bottom wall of the housing, and the other end of the reinforcement passes through the through hole and is welded to the top cover.
A third aspect of the embodiments of the present application provides an electric device, which includes the battery in the above embodiments.
The embodiment of the application provides a battery case, among battery and the power consumption device, through set up the reinforcement in the casing, the one end of reinforcement is connected with one of them in the diapire of casing and the top cap, the other end of reinforcement passes electric core and is connected with another in the diapire of casing and the top cap, when the battery case receives the impact of the gas that electric core that is located the battery case released like this, be located the reinforcement between the diapire of casing and the top cap, can apply opposite effort for the diapire of casing and top cap, prevent that the casing from taking place to warp, with the intensity that improves the casing, and then improve the security performance of battery.
Drawings
Fig. 1 is a perspective view of a battery case provided in an embodiment of the present application;
fig. 2 is an exploded view of a battery case provided in an embodiment of the present application;
FIG. 3 is a first layout view of a stiffener according to an embodiment of the present disclosure;
FIG. 4 is a second layout view of a stiffener according to an embodiment of the present disclosure;
fig. 5 is a layout view three of the reinforcing member provided in the embodiment of the present application;
fig. 6 is a perspective view of a battery provided in an embodiment of the present application;
fig. 7 is an exploded view of a battery provided in an embodiment of the present application;
fig. 8 is a top view of a battery provided in an embodiment of the present application;
FIG. 9 isbase:Sub>A sectional view taken along the line A-A in FIG. 8
Fig. 10 is an enlarged schematic view of region B in fig. 9.
Wherein the reference numerals are as follows:
100: a battery;
10: battery case:
11: a housing;
111: a bottom wall;
112: a side wall;
113: a pole structure;
114: a liquid injection port;
115: filling a liquid plug;
12: a top cover;
13: a reinforcement;
14: a first circular track;
15: a second circular track;
16: a third circular track;
20: an electric core;
21: a through hole;
22: a sub-cell;
221: a first pole piece;
222: a second pole piece;
223: an isolation film;
23: a reinforcing plate;
24: and (7) a tab.
Detailed Description
As described in the background art, the battery case has a problem of thermal expansion deformation in the related art, and the inventor finds that the problem is caused by that the battery case is usually made of a thin aluminum material, which results in low strength of the battery case, and a large amount of heat and gas are generated during charging or discharging of a battery cell located in the battery case, and the heat and gas may impact the battery case, which causes deformation of the battery case and reduces safety performance of the battery.
In order to solve the technical problem, an embodiment of the present application provides a battery case, a battery and an electric device, where a reinforcement is disposed in the case, one end of the reinforcement is connected to one of the bottom wall and the top cover of the case, and the other end of the reinforcement penetrates through the battery cell and is connected to the other of the bottom wall and the top cover of the case, so that when the battery case is impacted by gas released by the battery cell located in the battery case, the reinforcement located between the bottom wall and the top cover of the case can apply opposite acting forces to the bottom wall and the top cover of the case, thereby preventing the case from deforming, improving the strength of the case, and further improving the safety performance of the battery.
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments.
The embodiment of the present application provides an electric device, which may include a battery 100, where the battery 100 is used to provide electric energy for the electric device, and the electric device in the embodiment of the present application may be a vehicle, for example: the vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like.
In addition, the power utilization device can also be other energy storage devices, such as a mobile phone, a portable device, a notebook computer, an electric toy, an electric tool, a ship, a spacecraft and the like, wherein the spacecraft can comprise an airplane, a rocket, a space shuttle or a spacecraft.
The battery described in the embodiments of the present invention is not limited to be applied to the above-described electric device, but for brevity of description, the following embodiments are all described by taking a mobile phone as an example.
The mobile phone may include a mobile phone body and a battery disposed in the mobile phone body, wherein the battery is electrically connected to a circuit board of the mobile phone body for providing power to the circuit board to ensure normal use of the mobile phone.
The battery 100 may include a battery case 10 and a battery cell 20 disposed in the battery case 10, wherein a through hole 21 is disposed in the battery cell 20 along a thickness direction thereof, and the through hole 21 facilitates the penetration of the reinforcement 13 located in the battery case 10.
As shown in fig. 1 and 2, the battery case 10 includes a case 11 and a top cover 12 covering an opening of the case 11, and the case 11 is used for placing the battery cell 20 therein, wherein the case 11 may be an integral structure or a separate structure, and when the case 11 is an integral structure, the manufacturing process of the case 11 may be simplified, and the assembly difficulty may be reduced.
With continued reference to fig. 2, when the casing 11 is a separate structure, the casing 11 may include a bottom wall 111 and a side wall 112 disposed on the bottom wall 111, where the side wall 112 may be fixedly connected to the bottom wall 111 by welding or adhesion, and in this embodiment, by configuring the casing 11 as a separate structure, an area enclosed between the side wall 112 and the bottom wall 111 may be actually adjusted according to the size of the battery cell 20, so as to improve application flexibility of the casing 11.
It should be understood that, in the present embodiment, the sidewall 112 may be an integral annular structure, or may be a separate structure, and the present embodiment is not limited in detail herein.
The casing 11 has a reinforcing member 13 therein, one end of the reinforcing member 13 is connected to one of the bottom wall 111 and the top cover 12 of the casing 11, and the other end of the reinforcing member 13 passes through the through hole 21 of the cell 20 and then is connected to the other of the bottom wall 111 and the top cover 12 of the casing 11, for example, in the orientation shown in fig. 7, after one end of the reinforcing member 13 is connected to the bottom wall 111 of the casing 11, the other end of the reinforcing member 13 may pass through the through hole 21 of the cell 20 from bottom to top and then be connected to the top cover 12; for another example, after one end of the reinforcing member 13 is connected to the top cover 12, the other end of the reinforcing member 13 passes through the through hole 21 of the battery cell 20 from top to bottom and is then connected to the bottom wall of the casing 11.
It should be noted that the through hole 21 of the battery cell 20 may also facilitate the electrolyte to infiltrate the pole pieces of the battery cell 20, so as to improve the performance of the battery 100.
The positions and the numbers of the through holes 21 are respectively matched with the positions and the numbers of the reinforcing members 13, for example, when the number of the reinforcing members 13 is one, and the reinforcing members 13 are disposed at the center of the bottom wall 111 of the casing 11, the through holes 21 need to be disposed at the center of the battery cell 20.
In the present embodiment, by disposing the reinforcing member 13 in the casing 11, one end of the reinforcing member 13 is connected to one of the bottom wall 111 and the top cover 12 of the casing 11, and the other end of the reinforcing member 13 passes through the battery cell 20 and is connected to the other of the bottom wall 111 and the top cover 12 of the casing 11, so that when the battery case 10 is impacted by the gas released from the battery cell 20 located in the battery case 10, the reinforcing member 13 located between the bottom wall 111 and the top cover 12 of the casing 11 can apply opposite acting forces to the bottom wall 111 and the top cover 12 of the casing 11, so as to prevent the casing 11 from deforming, thereby improving the strength of the casing 11 and further improving the safety performance of the battery 100.
In some embodiments, one end of the reinforcement 13 is fixedly connected to the bottom wall 111 of the casing 11, and the other end of the reinforcement 13 passes through the through hole 21 and then is fixedly connected to the top cover 12, that is, one end of the reinforcement 13 may be fixedly connected to the bottom wall 111 of the casing 11, then the battery cell 20 is placed in the casing 11, and the other end of the reinforcement 13 passes through the through hole 21 of the battery cell 20 and then is fixedly connected to the top cover 12, for example, one end of the reinforcement 13 may be fixedly connected to the bottom wall 111 of the casing 11 by welding, and the other end of the reinforcement 13 may pass through the through hole 21 of the battery cell 20 and then be fixedly connected to the top cover 12 by welding, and the edge of the top cover 12 and the top edge of the casing 11 are fixedly connected together, thereby assembling the battery cell 20 and the battery case 10.
When the other end of the reinforcement 13 is fixedly connected to the top cover 12 by welding, a receiving hole may be formed in the area of the top cover 12 and the reinforcement 13, so that the reinforcement 13 is welded in the receiving hole by welding after the other end of the reinforcement 13 is located in the receiving hole.
The reinforcement 13 may also be fixedly connected to the bottom wall 111 of the casing 11 and the top cover 12 by other connection manners, for example, one end of the reinforcement 13 may be bonded to the bottom wall 111 of the casing 11, and the other end of the reinforcement 13 penetrates through the battery cell 20 and is then welded to the top cover 12, or for example, one end of the reinforcement 13 may be welded to the bottom wall 111 of the casing 11, and the other end of the reinforcement 13 may penetrate through the battery cell 20 and is then bonded to the top cover 12, and for example, two ends of the reinforcement 13 are respectively bonded to the bottom wall 111 and the top cover 12.
In this embodiment, the two ends of the reinforcing member 13 are respectively fixed to the bottom wall 111 of the housing 11 and the top cover 12, so that the connection strength between the reinforcing member 13 and the housing 11 can be increased, the housing 11 is prevented from being deformed by stress, the strength of the housing 11 is improved, and the safety performance of the battery 100 is improved.
In some embodiments, the reinforcing member 13 may be disposed in the central region of the bottom wall 111 of the casing 11, and in view of the large amount of heat or gas generated by the battery cells 20 located in the central position of the battery case 10, the heat or gas is not easily released out of the battery case 10, so that the region where the battery case 10 is easily deformed is mainly located in the central position, and therefore, the reinforcing member 13 is disposed in the central region of the bottom wall 111, which can increase the strength of the central region where the casing 11 is deformed and can also ensure the volumetric energy density of the battery 100.
In the present embodiment, the volumetric energy density of the battery refers to: the volumetric ratio of charged energy to energy storage medium for a given electrochemical energy storage device. When the volume of the battery becomes large, the volumetric energy density of the battery is reduced, and the energy of the battery is reduced.
It should be noted that, when the battery cell 20 includes a plurality of sub-battery cells 22, in this case, the central area may be understood as an area with a certain radius and centered on the middle-most sub-battery cell 22. When the battery cell is a laminated battery cell, the central region can be understood as a region with a certain radius by taking the center of the laminated battery cell as an original point, and if the distance between the center of the battery cell and the edge of the battery cell is H, the certain radius can be understood as 1/3-1/2H.
The number of the reinforcing members 13 is at least one, and for example, as shown in fig. 3, the number of the reinforcing members 13 may be one, and the reinforcing member 13 is provided at the center of the bottom wall 111 of the housing 11. For another example, the number of the reinforcing members 13 may be plural, wherein the arrangement of the plural reinforcing members 13 may be described by two embodiments described below, and it should be noted that the two embodiments described below are only exemplary and are not intended to limit the arrangement of the reinforcing members.
As a possible embodiment of the reinforcing members, one of the reinforcing members 13 is disposed at the center of the bottom wall 111 of the housing 11, and the remaining reinforcing members 13 are disposed at intervals along the first annular locus 14, the center of the first annular locus 14 coinciding with the center of the bottom wall 111 of the housing 11.
Illustratively, as shown in fig. 4, the number of the reinforcing members 13 is five, one reinforcing member 13 is disposed at the center of the bottom wall 111 of the housing 11, and the remaining four reinforcing members 13 are disposed at intervals along the first annular track 14.
The first annular track 14 may be a circular track or a rectangular track, and this embodiment is not limited in this respect.
This embodiment is through making several reinforcement 13 be annular distribution, can furthest improve the intensity of casing 11, prevents that casing 11 from taking place the bulge and warp, and then has improved the security performance of battery 100.
As another possible embodiment of the reinforcement, several reinforcements 13 are arranged at intervals along the second annular trajectory 15, the center of the second annular trajectory 15 coinciding with the center of the bottom wall 111 of the casing 11.
The plurality of stiffeners 13 are arranged at intervals along a third annular track 16, the center of the third annular track 16 coincides with the center of the second annular track 15, and the diameter of the third annular track 16 is larger than that of the second annular track 15.
Illustratively, as shown in fig. 5, the number of stiffeners 13 is eight, four stiffeners 13 being spaced apart along the second annular track 15, and four stiffeners 13 being spaced apart along the third annular track 16, so that the plurality of stiffeners 13 are arranged in two annular configurations.
In the present embodiment, the plurality of reinforcing members 13 are distributed on the circular tracks with different diameters, so that the strength of the case 11 can be sufficiently increased, the case 11 is prevented from swelling and deforming, and the safety and reliability of the battery 100 are improved.
It should be noted that the number of the reinforcing elements 13 distributed along the second annular track 15 may be different from the number of the reinforcing elements 13 distributed along the third annular track 16, for example, the number of the reinforcing elements 13 on the second annular track 15 may be three, and the number of the reinforcing elements 13 on the third annular track 16 may be five.
In addition, the distances between adjacent stiffeners 13 on the same circular track may be equal or different, and this embodiment is not limited in this respect.
In some embodiments, the cross-sectional shape of the reinforcement 13 is polygonal or circular in cross-section taken in a plane parallel to the bottom wall 111 of the housing 11, for example, the cross-sectional shape of the reinforcement 13 is rectangular or circular.
In the embodiment, the cross section of the reinforcing member 13 is formed into a regular shape, so that the manufacturing of the reinforcing member can be facilitated, and the production cost can be reduced.
In addition, the reinforcing member 13 may have an irregular shape, and may be designed according to actual needs.
Note that, the reinforcement 13 may be provided separately from the bottom wall 111 of the housing 11 as described in the above embodiment, or may be a projection directly formed integrally with the housing 11.
In some embodiments, the material of the reinforcing member 13 may include aluminum or stainless steel, which may reduce the weight of the reinforcing member 13 compared to iron, thereby improving the mass energy density of the battery and the performance of the battery.
In some embodiments, if the diameter of the reinforcing member 13 is less than 0.5mm, on one hand, the manufacturing difficulty of the reinforcing member 13 may be increased, and on the other hand, the strength of the reinforcing member 13 may be reduced, and in the using process, the reinforcing member is easily deformed and is difficult to support; if the diameter of the reinforcing member 13 is larger than 3mm, the mass and volume of the reinforcing member 13 are increased, and the energy density of the battery is reduced, so that the present embodiment sets the diameter of the reinforcing member 13 between 0.5mm and 3mm, which can increase the strength of the case 11 and also avoid reducing the energy density of the battery.
In some embodiments, as shown in fig. 6, a pole structure 113 may be further disposed on the side wall 112 of the casing 11, and the pole structure 113 is configured to be connected to a pole tab of the battery cell 20, so as to transmit electric energy of the battery cell 20 to an electric device.
Further, as shown in fig. 7, a liquid filling port 114 and a liquid filling plug 115 detachably connected to the liquid filling port 114 are further provided on the side wall 112 of the case 11, so that the electrolyte can be filled into the case through the liquid filling port 114 to realize the function of the battery.
The liquid filling plug 115 is used for plugging the liquid filling port 114 to prevent the electrolyte in the case 11 from leaking out of the case 11, thereby ensuring the safety and the service life of the battery 100.
The liquid filling plug 115 may be screwed to the liquid filling port 114, or may be connected to the liquid filling port 114 by being engaged therewith.
In some embodiments, since the reinforcing member 13 needs to penetrate through the battery cell 20, an insulating layer is disposed on the outer surface of the reinforcing member 13, and the insulating layer may be an insulating coating or a protective glue coated on the outer surface of the reinforcing member 13, and by disposing the insulating coating and the protective layer, the reinforcing member 13 can be protected, so as to prevent the electrolyte from corroding the reinforcing member 13, and improve the service life of the reinforcing member 13.
In some embodiments, as shown in fig. 9 and 10, the battery cell 20 may include a laminated structure, for example, the battery cell 20 may include a plurality of laminated sub-battery cells 22, where each sub-battery cell 22 includes a first pole piece 221, a separation film 223, and a second pole piece 222.
The isolation film 223 is disposed between the first pole piece 221 and the second pole piece 222 adjacent to each other, and is used for realizing the insulating arrangement between the first pole piece 221 and the second pole piece 222, wherein the isolation film 223 may be made of PP, PE, or the like.
It should be noted that, in the present embodiment, the polarities of the first pole piece 221 and the second pole piece 222 are opposite, the first pole piece 221 may be an anode pole piece, and may also be a cathode pole piece, and for convenience of description, the following embodiments all use the first pole piece as the anode pole piece, the second pole piece as the cathode pole piece, and the battery as the lithium battery as an example for description.
The second pole piece 222 includes a second current collector and two second diaphragms, wherein the number of the second diaphragms may be two, the two second diaphragms may be respectively disposed on the upper surface and the lower surface of the second current collector, the second current collector is made of copper, and the second diaphragm is made of carbon or silicon.
With continued reference to fig. 7, the battery cell 20 further includes a tab 24, one end of the tab 24 is used for connecting with the current collectors of the first pole piece 221 and the second pole piece 222, and the other end of the tab 24 is used for connecting with the pole structure 113, so as to implement the charging and discharging functions of the battery cell.
In some embodiments, as shown in fig. 9, the battery cell 20 is further provided with a reinforcing plate 23, and one end of the reinforcing plate 23 is flush with the upper top surface of the battery cell 20 and the other end of the reinforcing plate 23 is flush with the lower bottom surface of the battery cell 20 in a direction perpendicular to the bottom wall 111 of the casing 11.
The present embodiment utilizes the arrangement of the reinforcing plate 23 to support the side surface of the battery cell 20, so as to improve the strength of the battery cell 20.
The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (13)
1. The battery shell is characterized by comprising a shell body and a top cover for covering an opening of the shell body, wherein a battery cell is placed in the shell body;
a reinforcing piece is arranged in the shell, one end of the reinforcing piece is connected with one of the bottom wall of the shell and the top cover, and the other end of the reinforcing piece penetrates through the battery cell and is connected with the other one of the bottom wall of the shell and the top cover.
2. The battery case according to claim 1, wherein one end of the reinforcing member is disposed at a central region of the bottom wall of the case.
3. The battery can of claim 1, wherein the number of the reinforcing members is plural.
4. The battery case according to claim 1, wherein the reinforcing member is one and is provided at the center of the bottom wall of the case.
5. The battery case according to claim 3, wherein one of said reinforcing members is disposed at the center of the bottom wall of said case, and the remaining reinforcing members are disposed at intervals along a first circular locus, the center of said first circular locus coinciding with the center of the bottom wall of said case.
6. The battery case according to claim 3, wherein a plurality of the reinforcing members are arranged at intervals along a second circular locus, the center of the second circular locus coinciding with the center of the bottom wall of the case;
the plurality of the reinforcing parts are arranged at intervals along a third annular track, the center of the third annular track is superposed with the center of the second annular track, and the diameter of the third annular track is larger than that of the second annular track.
7. The battery case according to any one of claims 1 to 6, wherein the reinforcing member has a polygonal cross-sectional shape or a circular cross-sectional shape in a cross-section taken in a plane parallel to the bottom wall of the case.
8. The battery can of claim 7, wherein the stiffener has a diameter of 0.5mm to 3mm;
the material of the reinforcing piece comprises stainless steel or aluminum.
9. The battery can of any of claims 1-6, wherein an insulating layer is disposed on an outer surface of the reinforcement.
10. A battery comprising a cell and the battery case of any one of claims 1-9, the cell disposed within the battery case;
the battery cell is provided with a through hole corresponding to the reinforcing piece along the thickness direction of the battery cell, and the through hole is convenient for the reinforcing piece to penetrate through.
11. The battery of claim 10, wherein one end of the reinforcing member is fixedly connected to the bottom wall of the case, and the other end of the reinforcing member passes through the through hole and is fixedly connected to the top cover.
12. The battery of claim 11, wherein one end of the reinforcement is welded to the bottom wall of the case and the other end of the reinforcement is welded to the top cover.
13. An electric device comprising the battery of claim 12.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2021/121816 WO2023050191A1 (en) | 2021-09-29 | 2021-09-29 | Battery case, battery, and electrical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115152082A true CN115152082A (en) | 2022-10-04 |
Family
ID=83404785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180015025.7A Pending CN115152082A (en) | 2021-09-29 | 2021-09-29 | Battery case, battery and power consumption device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115152082A (en) |
| WO (1) | WO2023050191A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116782542A (en) * | 2023-08-15 | 2023-09-19 | 荣耀终端有限公司 | Shell assembly and terminal equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06150893A (en) * | 1992-11-04 | 1994-05-31 | Sony Corp | Storage battery |
| JP2013101829A (en) * | 2011-11-08 | 2013-05-23 | Panasonic Corp | Tabular secondary battery and electronic apparatus system including the same |
| KR101741123B1 (en) * | 2015-02-04 | 2017-05-29 | 주식회사 엘지화학 | Battery Cell Having Through Hole |
| CN211980804U (en) * | 2020-05-26 | 2020-11-20 | 苏州凌威新能源科技有限公司 | Battery with a battery cell |
| CN112216861A (en) * | 2020-11-05 | 2021-01-12 | 厦门致力金刚石科技股份有限公司 | Lithium battery monomer, lithium battery pack and plate structure |
-
2021
- 2021-09-29 WO PCT/CN2021/121816 patent/WO2023050191A1/en unknown
- 2021-09-29 CN CN202180015025.7A patent/CN115152082A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116782542A (en) * | 2023-08-15 | 2023-09-19 | 荣耀终端有限公司 | Shell assembly and terminal equipment |
| CN116782542B (en) * | 2023-08-15 | 2023-11-07 | 荣耀终端有限公司 | Shell assembly and terminal equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023050191A1 (en) | 2023-04-06 |
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