CN220604803U - Shell, battery and electric equipment - Google Patents
Shell, battery and electric equipment Download PDFInfo
- Publication number
- CN220604803U CN220604803U CN202322189801.4U CN202322189801U CN220604803U CN 220604803 U CN220604803 U CN 220604803U CN 202322189801 U CN202322189801 U CN 202322189801U CN 220604803 U CN220604803 U CN 220604803U
- Authority
- CN
- China
- Prior art keywords
- inner cavity
- battery
- electrolyte
- shell
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003792 electrolyte Substances 0.000 claims abstract description 47
- 239000012530 fluid Substances 0.000 claims abstract description 20
- 230000001502 supplementing effect Effects 0.000 claims abstract description 18
- 238000001802 infusion Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 abstract description 12
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000007774 positive electrode material Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000006183 anode active material Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 polypropylene Polymers 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
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 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
- 238000007599 discharging Methods 0.000 description 1
- 238000002637 fluid replacement therapy Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 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
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
-
- 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 utility model relates to a shell, a battery and electric equipment, wherein the shell comprises a shell and an inner cavity, the inner cavity is positioned in the shell, a plurality of through holes are formed in the cavity wall of the inner cavity, each through hole is filled with a thermosensitive deformation piece, the thermosensitive deformation piece is provided with a first form and a second form, when the thermosensitive deformation piece is in the first form, the corresponding through hole is in a conducting state, and when the thermosensitive deformation piece is in the second form, the corresponding through hole is in a sealing state; electrolyte is injected into the inner cavity, a fluid supplementing cavity is formed between the shell and the inner cavity, and the electrolyte is also injected into the fluid supplementing cavity. The utility model also discloses a battery and electric equipment. The utility model can effectively ensure the liquid suction uniformity of the battery cell and improve the liquid supplementing quality.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a shell, a battery and electric equipment.
Background
In the cycling process of the lithium ion battery, electrolyte is gradually consumed along with charge and discharge cycles, so that the concentration of the electrolyte is reduced, and the cycling performance of the battery is affected. In order to ensure the cycle performance of the battery, electrolyte can be supplemented to the battery in the later period of battery cycle, and the electrolyte can be supplemented to help maintain the concentration of lithium ions in the electrolyte, so that the reduction rate of the concentration of the electrolyte is slowed down, the reduction rate of the capacity of the battery is slowed down, and the phenomenon of jump-type reduction of the electric quantity of the battery in the later period of battery cycle is delayed.
In the chinese patent with the publication number CN113394490a, the name "a secondary battery", a flexible member is placed in the battery to wrap the electrolyte, and in the later period of battery cycle, the expansion of the battery core will squeeze the flexible member to rupture and achieve the effect of replenishing the electrolyte and releasing pressure, but because the expansion of the battery core usually occurs on the large surface (the large surface is the largest side in the battery core) of the battery core, and the place where the expansion is the most serious is the large surface center position of the battery core, the rupture position of the flexible member in the patent is basically limited at the position close to the large surface center area, and the specific rupture position of the flexible member is limited by the expansion degree of the battery core, therefore, the problem that the liquid absorption of the battery core is uneven is easily caused, the quality of the liquid is not guaranteed well, and the quality of the battery is affected.
Disclosure of Invention
Therefore, the utility model aims to overcome the defect of poor electrolyte replenishing quality in the later battery cycle stage in the prior art.
In order to solve the technical problems, the utility model provides a shell, which comprises,
a housing;
the heat-sensitive deformation device comprises an outer shell, an inner cavity and a heat-sensitive deformation piece, wherein the inner cavity is positioned in the outer shell, a plurality of through holes are formed in the cavity wall of the inner cavity, each through hole is filled with the heat-sensitive deformation piece, the heat-sensitive deformation piece is provided with a first form and a second form, when the heat-sensitive deformation piece is in the first form, the corresponding through hole is in a conducting state, and when the heat-sensitive deformation piece is in the second form, the corresponding through hole is in a sealing state;
electrolyte is injected into the inner cavity, a fluid supplementing cavity is formed between the outer shell and the inner cavity, and electrolyte is also injected into the fluid supplementing cavity.
In one embodiment of the present utility model, the opening directions of at least two of the through holes are different.
In one embodiment of the utility model, the inner cavity is rectangular, and corners of the rectangular inner cavity are arc-shaped.
In one embodiment of the utility model, the mass ratio of the electrolyte in the fluid replacement cavity to the electrolyte in the inner cavity is 0.05-0.2.
A battery comprising a housing as claimed in any preceding claim, the internal cavity housing an electrical cell.
In one embodiment of the utility model, the housing and the inner cavity are each rectangular.
In one embodiment of the utility model, the ratio of the length of the battery cell to the length of the inner cavity is 85% -95%.
In one embodiment of the utility model, the ratio of the width of the battery cell to the width of the inner cavity is 85% -95%.
In one embodiment of the utility model, the ratio of the length of the battery cell to the length of the housing is 80% to 94%.
In one embodiment of the utility model, the ratio of the cell width to the housing width is 85% to 94%.
A powered device comprising a battery as claimed in any one of the preceding claims.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
the shell, the battery and the electric equipment can enable the electrolyte to be uniformly soaked by the battery core, ensure the liquid absorption uniformity of the battery core and improve the liquid supplementing quality.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.
Fig. 1 is a schematic view showing the internal structure of a first battery according to the present utility model;
fig. 2 is a schematic view of the internal structure of a second battery of the present utility model;
fig. 3 is a schematic view of the internal structure of a third battery of the present utility model;
fig. 4 is a schematic view of the internal structure of a fourth battery of the present utility model;
description of the specification reference numerals: 1. a housing; 2. an inner cavity; 21. a through hole; 22. a corner; 3. a thermosensitive deformation member; 4. a fluid supplementing cavity; 5. a partition plate; 6. a battery cell;
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
In the prior art, electrolyte replenishing quality of the battery in the later cycle is poor, battery quality cannot be guaranteed well, and the embodiment provides a shell, a battery and electric equipment. The battery is used for supplying power to the electric equipment.
The electric equipment of the embodiment comprises a battery. The electric equipment can be an automobile, a mobile phone, portable equipment, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The automobile can be a fuel oil automobile, a fuel 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; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric equipment in particular.
The battery of this embodiment includes casing, electric core and top cap, and the opening of top cap sealed casing to be formed with the accommodation space between casing, the electric core sets up in the accommodation space.
The housing of this embodiment may be a hollow structure with one side open, or may be a hollow structure with two sides open.
The battery cell of the embodiment comprises a positive electrode plate, a negative electrode plate and a diaphragm. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector comprises a positive electrode coating area and a positive electrode lug connected to the positive electrode coating area, wherein the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode lug is not coated with the positive electrode active material layer. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, wherein the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The separator may be made of PP (polypropylene) or PE (polyethylene). In order to protect and insulate the battery cell, the battery cell can be coated with an insulating film, and the insulating film can be synthesized by PP, PE, PET, PVC or other high polymer materials.
The housing structure of the present embodiment will be further described with reference to fig. 1 to 4.
Examples
As shown in fig. 1, the present embodiment discloses a housing, which comprises an outer shell 1 and an inner cavity 2, wherein the inner part of the inner cavity 2 is used for placing a battery cell 6;
the inner cavity 2 is positioned in the shell 1, a plurality of through holes 21 are formed in the cavity wall of the inner cavity 2, each through hole 21 is filled with a thermosensitive deformation member 3, the thermosensitive deformation member 3 has a first form and a second form, when the thermosensitive deformation member 3 is in the first form, the corresponding through hole 21 is in a conducting state, and when the thermosensitive deformation member 3 is in the second form, the corresponding through hole 21 is in a sealing state;
electrolyte is injected into the inner cavity 2, a fluid supplementing cavity 4 is formed between the shell 1 and the inner cavity 2, and the electrolyte is also injected into the fluid supplementing cavity 4.
The thermosensitive deforming member 3 may be a member made of a thermosensitive material, and when the temperature is less than the deformation temperature, the thermosensitive deforming member 3 does not deform, and at this time, the thermosensitive deforming member 3 is in the second form, and the corresponding through hole 21 is closed by the thermosensitive deforming member 3 inside; when the temperature is greater than or equal to the deformation temperature, the thermosensitive deformation member 3 deforms, and at this time, the thermosensitive deformation member 3 is in the first form, and the corresponding through hole 21 is conducted.
In the above structure, the conduction or the sealing between the shell 1 and the inner cavity 2 is realized through the deformation of the thermosensitive deformation member 3, at the later stage of the battery cycle, the internal resistance is increased due to the increase of the battery polarization, the battery releases more and more heat in the discharging process, and when the temperature is increased to the deformation temperature of the thermosensitive deformation member 3, the thermosensitive deformation member 3 in the through hole 21 deforms, so that the corresponding through hole 21 is conducted, and the electrolyte in the electrolyte supplementing cavity 4 flows into the inner cavity 2, thereby realizing the electrolyte supplementing.
Because the position of the through hole 21 is the fluid infusion inlet, the liquid inlet position during fluid infusion can be accurately controlled by controlling the position of the through hole 21, the fluid infusion quality is improved, and the electrolyte can be evenly infiltrated by the battery cell 6; and through the arrangement of a plurality of through holes 21, electrolyte in the electrolyte supplementing cavity 4 can enter the inner cavity 2 from different inlets, so that the liquid absorption uniformity of the battery cells in the inner cavity 2 is better ensured.
In addition, the liquid supplementing is realized through the mode of the through holes 21, so that the damage degree to the original battery structure is reduced to the greatest extent, and the processing and arrangement are facilitated.
The type of the thermosensitive material may be selected according to actual needs, and an appropriate deformation temperature may be selected, which is not limited in the present utility model.
Further, the outer casing 1 and the inner cavity 2 are both made of metal, for example, the outer casing 1 is made of aluminum, and the inner cavity 2 is made of aluminum.
In one embodiment, the plurality of through holes 21 in the cavity wall of the inner cavity 2 may be uniformly arranged.
In one embodiment, the opening directions of at least two through holes 21 are different, so as to facilitate fluid infusion from different directions, thereby further facilitating the assurance of fluid infusion uniformity of the battery cell 6. For example, a plurality of through holes 21 may be provided in sequence in the longitudinal direction of the chamber wall while a plurality of through holes 21 are provided in sequence in the width direction of the chamber wall, with the axis of the through holes 21 arranged in the longitudinal direction and the axis of the through holes 21 arranged in the width direction being perpendicular to each other.
Wherein the inner cavity 2 may take a variety of forms: as shown in fig. 3 and 4, a partition board 5 may be disposed inside the casing 1, the partition board 5 divides the casing 1 into a fluid-supplementing cavity 4 and an inner cavity 2, and the partition board 5 itself serves as a cavity wall of the inner cavity 2; or as shown in fig. 1 and 2, the inner cavity 2 is arranged inside the shell 1 in an integral closed-loop structure, and a fluid supplementing cavity 4 is formed between the peripheral cavity walls of the inner cavity 2 and the shell 1.
Further, as shown in fig. 2, the inner cavity 2 is in an integral closed-loop structure and is arranged inside the outer shell 1, the inner cavity 2 is rectangular, and the corners 22 of the rectangular inner cavity 2 are arc-shaped, i.e. the corners 22 can be rounded.
Compared with a square inner shell with the same size, through the arc-shaped design at the corner 22, when electrolyte with the same capacity is filled into the inner cavity 2, the electrolyte liquid level position in the inner cavity 2 with the round corners is higher, and the infiltration of the electrolyte is facilitated. In addition, the fillet of interior cavity 2 can with the fillet equiproportion size setting of electric core 6, the shape of the corner 22 of electric core 6 and the corner 22 of inner shell suits promptly to when making battery loading use, can guarantee that electric core 6 corner 22 atress is more even, thereby help improving battery performance.
In one of the embodiments, in order to more facilitate the flow of the electrolyte, the through hole 21 may be provided near the bottom of the inner chamber 2.
In one embodiment, the mass ratio of the electrolyte in the electrolyte replenishing cavity 4 to the electrolyte in the inner cavity 2 is 0.05-0.2, so that the electrolyte is not wasted while the electrolyte replenishing effect is ensured, and the problem that the weight of the battery is excessive due to excessive electrolyte in the electrolyte replenishing cavity 4 is avoided.
The embodiment also discloses a battery, which comprises the shell of any one of the above, and the inner cavity 2 is internally provided with an electric core 6.
In one embodiment, the housing 1 and the inner cavity 2 are each rectangular.
In one embodiment, the ratio of the length of the battery cell 6 to the length of the inner cavity 2 is 85% -95%, so that a sufficient gap for accommodating electrolyte is formed between the battery cell 6 and the inner cavity 2 in the length direction, and the installation of the battery cell 6 is facilitated.
In one embodiment, the ratio of the width of the battery cell 6 to the width of the inner cavity 2 is 85% -95%, so that a sufficient gap for accommodating the electrolyte is provided between the battery cell 6 and the inner cavity 2 in the width direction, and the installation of the battery cell 6 is facilitated.
In one embodiment, the ratio of the length of the battery core 6 to the length of the housing 1 is 80% -94%, so that the fluid infusion chamber 4 is ensured to have a certain length space to accommodate enough electrolyte, and meanwhile, the arrangement and layout of the fluid infusion chamber 4 are facilitated.
In one embodiment, the ratio of the width of the battery core 6 to the width of the housing 1 is 85% -94%, so that the fluid infusion chamber 4 is ensured to have a certain width space to accommodate enough electrolyte, and meanwhile, the arrangement and layout of the fluid infusion chamber 4 are facilitated.
According to the battery structure, electrolyte can be effectively supplemented at the later period of battery circulation, the liquid supplementing position can be accurately controlled, the liquid supplementing quality of the battery core is guaranteed well, the reduction rate of lithium ion concentration in the electrolyte in the inner cavity can be effectively slowed down through the supplemented electrolyte, the reduction rate of battery capacity is slowed down, and the service life of the battery is guaranteed.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (11)
1. A housing, characterized in that: comprising the steps of (a) a step of,
a housing (1);
the heat-sensitive deformation device comprises an outer shell, an inner cavity (2), a plurality of through holes (21) and a heat-sensitive deformation member (3), wherein the inner cavity (2) is positioned in the outer shell, the cavity wall of the inner cavity (2) is provided with the plurality of through holes (21), each through hole (21) is internally filled with the heat-sensitive deformation member (3), the heat-sensitive deformation member (3) has a first form and a second form, when the heat-sensitive deformation member (3) is in the first form, the corresponding through hole (21) is in a conducting state, and when the heat-sensitive deformation member (3) is in the second form, the corresponding through hole (21) is in a closed state;
electrolyte is injected into the inner cavity (2), a fluid supplementing cavity (4) is formed between the shell (1) and the inner cavity (2), and the electrolyte is also injected into the fluid supplementing cavity (4).
2. The housing according to claim 1, wherein: the opening directions of at least two of the through holes (21) are different.
3. The housing according to claim 1, wherein: the inner cavity (2) is rectangular, and corners (22) of the rectangular inner cavity (2) are arc-shaped.
4. The housing according to claim 1, wherein: the mass ratio of the electrolyte in the fluid infusion cavity (4) to the electrolyte in the inner cavity (2) is 0.05-0.2.
5. A battery, characterized in that: comprising a housing according to any one of claims 1-4, the inner cavity (2) housing a battery cell (6).
6. The battery according to claim 5, wherein: the shell (1) and the inner cavity (2) are rectangular.
7. The battery according to claim 6, wherein: the ratio of the length of the battery cell (6) to the length of the inner cavity (2) is 85% -95%.
8. The battery according to claim 6, wherein: the ratio of the width of the battery cell (6) to the width of the inner cavity (2) is 85% -95%.
9. The battery according to claim 6, wherein: the ratio of the length of the battery cell (6) to the length of the shell (1) is 80% -94%.
10. The battery according to claim 6, wherein: the ratio of the width of the battery cell (6) to the width of the shell (1) is 85% -94%.
11. An electrical consumer, characterized in that: a battery comprising a battery according to any one of claims 5-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322189801.4U CN220604803U (en) | 2023-08-15 | 2023-08-15 | Shell, battery and electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322189801.4U CN220604803U (en) | 2023-08-15 | 2023-08-15 | Shell, battery and electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220604803U true CN220604803U (en) | 2024-03-15 |
Family
ID=90166229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322189801.4U Active CN220604803U (en) | 2023-08-15 | 2023-08-15 | Shell, battery and electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220604803U (en) |
-
2023
- 2023-08-15 CN CN202322189801.4U patent/CN220604803U/en active Active
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