CN215816085U - Battery cell and energy storage device - Google Patents
Battery cell and energy storage device Download PDFInfo
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- CN215816085U CN215816085U CN202121481762.XU CN202121481762U CN215816085U CN 215816085 U CN215816085 U CN 215816085U CN 202121481762 U CN202121481762 U CN 202121481762U CN 215816085 U CN215816085 U CN 215816085U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses an electric core and an energy storage device, wherein the electric core comprises a shell, a winding core, a bonding pad, a top cover assembly and a switching sheet, the winding core is arranged in the shell, and one end of the winding core is provided with a negative pole lug; the bonding pad is attached to one end of the winding core and connected with the negative pole lug; the top cover assembly is arranged at the end part of the shell and is provided with a cathode pole and an insulating cover plate, the adapter plate is connected with the bonding pad, and the adapter plate is connected with the cathode pole in an adapter way; the adaptor piece includes the bending segment, and electric core still includes the reinforcement, and the reinforcement cladding is in the bending segment, and the width of adaptor piece is D1, and the width of reinforcement is D2, and insulating cover plate's periphery diameter is D3, satisfies: d3 is more than or equal to D2 is more than or equal to D1/2. According to the battery cell, the bending section can facilitate the connection of the negative pole post and the negative pole lug, and the reliability of the electric conduction of the negative pole post and the negative pole lug is ensured. Meanwhile, the reinforcing piece is coated on the bending section, so that the fatigue fracture of the bending section can be prevented, the service life of the adapter piece is prolonged, and the structural reliability and stability of the battery cell are ensured.
Description
Technical Field
The utility model relates to the technical field of energy storage devices, in particular to a battery cell and an energy storage device.
Background
Under the pressure of energy crisis and environmental pollution problems, safety, environmental protection, and energy conservation are becoming more and more important in the current social development. Therefore, the energy storage device is more and more widely applied due to the characteristics of energy conservation, environmental protection and no pollution, and for example, the energy storage device can be applied to a plurality of application fields such as electric vehicles and electronic equipment.
In the correlation technique, energy memory's electric core includes negative pole post and negative pole utmost point ear, and negative pole post and negative pole utmost point ear link to each other and the electric conductance leads through the switching piece, and when how to guarantee the structural reliability of switching piece, the stability of guaranteeing the electric conductance of negative pole post and negative pole utmost point ear has become the problem that awaits a urgent solution.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the battery cell which is good in structural reliability and stable in electric conduction.
The utility model also provides an energy storage device which comprises the battery cell.
The battery cell according to the embodiment of the utility model comprises: a housing; the winding core is arranged in the shell, one end of the winding core is provided with a negative pole lug and an insulating cover plate, and the negative pole lug penetrates through the insulating cover plate; (ii) a The bonding pad is attached to one end of the winding core and connected with the negative pole lug; the top cover assembly is arranged at the end part of the shell and is provided with a cathode pole; one end of the adapter sheet is connected with the bonding pad, and the other end of the adapter sheet is connected with the negative pole post so as to enable the negative pole post and the negative pole tab to be electrically conducted; wherein, the adaptor piece includes the bending segment, electric core still includes the reinforcement, the reinforcement cladding in the bending segment the width of adaptor piece is D1, the width of reinforcement is D2, insulating cover plate's periphery diameter is D3, satisfies: d3 is more than or equal to D2 is more than or equal to D1/2.
According to the battery cell provided by the embodiment of the utility model, the bending section is arranged, so that the connection between the negative pole post and the negative pole lug can be facilitated, and the reliability of electric conduction between the negative pole post and the negative pole lug is ensured. Meanwhile, the reinforcing piece is coated on the bending section, so that the fatigue fracture of the bending section can be prevented, the service life of the adapter piece is prolonged, and the structural reliability and stability of the battery cell are ensured.
In some embodiments, the interposer further includes a first connection section connected to the negative electrode post and a second connection section connected to the negative electrode tab, the first connection section and the second connection section are disposed opposite to each other, a first transition section is connected between the first connection section and the bending section, and a second transition section is connected between the second connection section and the bending section.
In some embodiments, a segment of the stiffener is wrapped around the first transition segment and/or the second transition segment.
In some embodiments, the thickness of the bending section is smaller than that of the first connecting section, or the thickness of the bending section is smaller than that of the second connecting section.
In some embodiments, the stiffener surrounds a perimeter wall of the bend.
In some embodiments, the interposer is configured as a resilient metal member.
In some embodiments, the other end of the winding core is further provided with a positive electrode tab and a positive electrode adapter sheet, and the positive electrode adapter sheet covers the positive electrode tab and is welded with the positive electrode tab so as to connect the positive electrode adapter sheet and the winding core into a whole.
In some embodiments, the reinforcement is a tape or a glue layer.
In some embodiments, the reinforcement is a layer of mastic.
An energy storage device according to the present invention includes the battery cell described above. According to the energy storage device, the energy storage device can facilitate the connection of the negative pole post and the negative pole lug by arranging the bending section, and the connection reliability of the negative pole post and the negative pole lug is ensured. Meanwhile, the reinforcing piece is coated on the bending section, so that the fatigue fracture of the bending section can be prevented, the service life of the energy storage device is prolonged, and the structural reliability and stability of the energy storage device are ensured.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an energy storage device according to an embodiment of the utility model;
fig. 2 is a schematic structural diagram of a cell according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cell according to an embodiment of the present invention;
fig. 4 is a perspective view of a cell according to an embodiment of the utility model;
FIG. 5 is a schematic structural diagram of a bonding pad and an interposer according to an embodiment of the utility model;
fig. 6 is an exploded view of a portion of the structure of a cell according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an interposer and an insulating cover plate according to an embodiment of the present invention.
Reference numerals:
an electric core 100; an energy storage device 200; a case 210; a first half-shell 211; a second half-shell 212;
a housing 10; a core 20; a pad 30; a cap assembly 40; a negative electrode post 41; an insulating cover plate 42;
an interposer 50; a bending section 51; a first connecting section 52; the second connection section 53; a first transition section 54; a second transition section 55;
a reinforcing member 60; and a positive electrode interposer 70.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A battery cell 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 7, and the battery cell 100 includes a casing 10, a winding core 20, a bonding pad 30, a top cover assembly 40, and an interposer 50. It should be noted that the battery cells 100 may be used as a single battery cell in the energy storage device 200, for example, as shown in fig. 1, the energy storage device 200 includes a box body 210, the box body 210 includes a plurality of battery cells 100 therein, the box body 210 includes a first half shell 211 and a second half shell 212, and the first half shell 211 and the second half shell 212 are fastened to construct a receiving space of the plurality of battery cells 100. The energy storage device 200 may include a plurality of battery cells 100, and the plurality of battery cells 100 may be connected in series, in parallel, or in series-parallel. Of course, a single battery cell 100 may also be used as an independent charging and discharging element, and is not limited herein.
Specifically, as shown in fig. 1 to 7, the winding core 20 is provided in the case 10, and one end of the winding core 20 has a negative electrode tab. The bonding pad 30 is attached to one end of the winding core 20 and connected with the negative electrode tab. The top cover assembly 40 is disposed at an end of the housing 10, the top cover assembly 40 has a negative electrode post 41 and an insulating cover plate 42, and the negative electrode post 41 is disposed through the insulating cover plate 42. One end of the interposer 50 is connected to the bonding pad 30, and the other end of the interposer 50 is connected to the negative electrode post 41 so that the negative electrode post 41 and the negative electrode tab are electrically connected. The adaptor piece 50 includes a bending section 51, where the bending section 51 may mean that the adaptor piece 50 has at least two portions that are not in the same plane to construct a bending structure, so as to facilitate connection between the negative electrode post 41 and the negative electrode tab, and ensure reliability of connection between the negative electrode post 41 and the negative electrode tab. For example, the bending section 51 may be configured in a C-shaped structure, and the bending section 51 may be a plurality of which are directly connected or indirectly connected.
The battery cell 100 further includes a reinforcing member 60, and the reinforcing member 60 is wrapped on the bending section 51. Compared with other parts of the interposer 50, the bending section 51 of the interposer 50 is more easily broken due to the bending property thereof, so that the reinforcing member 60 is coated on the bending section 51 to enhance the toughness, prevent the bending section 51 from fatigue fracture, prolong the service life of the interposer 50, and ensure the structural reliability and stability of the battery cell 100. The poor contact between the tab and the adapter sheet 50 is avoided, the fitting degree between the adapter sheet 50 and the bonding pad 30 is higher, the power storage capacity and the discharge capacity of the energy storage device 200 are improved, and the service life of the energy storage device is prolonged. The width (e.g., the left-right direction shown in fig. 7) of the interposer 50 is D1, the width (e.g., the left-right direction shown in fig. 7) of the stiffener 60 is D2, the outer peripheral diameter of the insulating cover plate 42 is D3, the outer peripheral diameter of the insulating cover plate 42 may mean that the cross section of the insulating cover plate is circular, and the diameter of the outer contour of the insulating cover plate is D3, and the following requirements are satisfied: d3 is more than or equal to D2 is more than or equal to D1/2. For example, the cross section of the insulating cover plate 42 is cylindrical, so that the reinforcing member 60 can prevent fatigue fracture of the bending section 51 of the interposer 50, improve the service life of the interposer 50, occupy no space, reduce cost, and facilitate the miniaturization design of the battery cell 100. For example, the width of the interposer 50 is equal to the width of the stiffener 60, or the width of the stiffener 60 is equal to the width of the insulating cover 42 where it is located.
According to the battery cell 100 provided by the embodiment of the utility model, the bending section 51 is arranged to facilitate the connection between the negative electrode post 41 and the negative electrode tab, so that the reliability of the electrical conduction between the negative electrode post 41 and the negative electrode tab is ensured. Meanwhile, the reinforcing piece 60 is coated on the bending section 51, the width of the reinforcing piece 60 is at least larger than half of the width of the adapter sheet 50, and the width of the reinforcing piece 60 is smaller than the peripheral diameter of the insulating cover plate 42, so that the bending section 51 can be prevented from fatigue fracture, the service life of the adapter sheet 50 is prolonged, the structural reliability and stability of the battery cell 100 are ensured, the occupied space is avoided, the cost is reduced, and the miniaturization design of the battery cell 100 is facilitated.
In some embodiments, as shown in fig. 3, the interposer 50 further includes a first connection section 52 connected to the negative electrode post 41 and a second connection section 53 connected to the negative electrode tab, wherein the first connection section 52 and the second connection section 53 are oppositely disposed to facilitate connection of the first connection section 52 and the negative electrode post 41 and connection of the second connection section 53 and the negative electrode tab. A first transition section 54 is connected between the first connection section 52 and the bending section 51, and the first transition section 54 can improve the structural stability of the bending section 51 and the first connection section 52. A second transition section 55 is connected between the second connecting section 53 and the bending section 51, and the second transition section 55 can improve the structural stability of the bending section 51 and the second connecting section 53. For example, the first transition section 54 and the second transition section 55 may be arcuate sections having a greater curvature than the bend section 51.
Further, a partial section of the reinforcement 60 is wrapped around the first transition section 54 and/or the second transition section 55. For example, the reinforcement member 60 is clad to the first transition section 54 and the second transition section 55. Therefore, the toughness of the adapter plate 50 can be further improved, and the service life of the adapter plate 50 is conveniently prolonged.
In some embodiments, the thickness of the bending section 51 is smaller than the thickness of the first connecting section 52, or the thickness of the bending section 51 is smaller than the thickness of the second connecting section 53. Therefore, the toughness and fatigue strength of the bent section 51 can be improved, which is beneficial to improving the service life of the battery cell 100. For example, the thickness of the bending section 51 is smaller than the thickness of the first connecting section 52, and the thickness of the bending section 51 is smaller than the thickness of the second connecting section 53, that is, the thickness of the bending section 51 is thinned, so as to improve the toughness of the bending section 51.
In some embodiments, as shown in fig. 4, the reinforcing member 60 may surround the peripheral wall of the bending section 51 to ensure that the sidewalls of the bending section 51 in the circumferential direction have good toughness, which is beneficial to improving the structural reliability of the interposer 50. Of course, in other embodiments, the reinforcing member 60 may be disposed at any position of the peripheral wall of the bending section 51 according to actual requirements, and is not limited herein.
In some embodiments, interposer 50 is configured as a resilient metal member. For example, interposer 50 may be a sheet-like copper layer. And further, the adaptor sheet 50 can be adapted to the internal structure of the battery cell 100, so as to facilitate the reliability of the electrical conduction between the negative electrode tab and the negative electrode post 41. The copper layer has good ductility and high thermal and electrical conductivity, and can prevent the bending section 51 from being broken, thereby prolonging the service life of the adapter plate 50.
In some embodiments, referring to fig. 1, the other end of the winding core 20 further has a positive electrode tab, and a positive electrode adaptor sheet 70 is provided, and the positive electrode adaptor sheet 70 covers and is welded to the positive electrode tab to connect the positive electrode adaptor sheet 70 and the winding core 20 into a whole. The one end of the core 20 that rolls up that so sets up is equipped with the negative pole utmost point ear, and the other end of rolling up core 20 is equipped with anodal utmost point ear, and the both ends of rolling up core 20 are connected with anodal switching piece 70, switching piece 50 through anodal utmost point ear, negative pole utmost point ear respectively, form the electric current path and realize charging and discharging of electric core 100. The positive adapter plate 70 and the adapter plate 50 can be directly and fixedly connected to the winding core 20 to form a whole, which is helpful for current circulation, reduces conversion loss, and improves the utilization rate and conversion rate of the battery core 100 to current.
In some embodiments, the stiffener 60 may be a tape or a glue layer. Therefore, on one hand, the texture of the adhesive tape or the adhesive water layer is soft, so that the reinforcing piece 60 can be conveniently arranged to be attached to the outline of the adapter sheet 50, and the structure of the adapter sheet 50 is firmer; on the other hand, the reinforcing member 60 thus provided is easy to machine and install, can improve the assembly efficiency, and is low in cost.
For example, the stiffener 60 may be a layer of epoxy. The yellow glue has the characteristics of long service life, easiness in processing, high strength, environmental friendliness and the like. Therefore, the reinforcing member 60 can effectively ensure the reinforced toughness of the bent section 51, so that the connection between the negative electrode post 41 and the negative electrode tab is more secure.
According to the energy storage device 200 of the embodiment of the utility model, including the battery core 100, the energy storage device 200 can facilitate connection between the negative pole post 41 and the negative pole tab by arranging the bending section 51, so as to ensure the reliability of electrical conduction between the negative pole post 41 and the negative pole tab. Meanwhile, the reinforcing member 60 is wrapped on the bending section 51, so that fatigue fracture of the bending section 51 can be prevented, the service life of the energy storage device 200 is prolonged, and the structural reliability and stability of the energy storage device 200 are ensured. The width (for example, the left-right direction shown in fig. 5) of the interposer 50 is D1, the width (for example, the width direction shown in fig. 5) of the stiffener 60 is D2, and the outer peripheral diameter of the insulating cover plate is D3, which satisfies: d3 is more than or equal to D2 is more than or equal to D1/2. From this, can guarantee that the reinforcement can more prevent the fatigue fracture of bending segment 51 to the switching piece, improve the life of switching piece, and can not occupation space, reduce cost does benefit to the miniaturized design of electric core.
Other constructions, etc. and operations of the battery cell 100 according to an embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means two or more.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A battery cell, comprising:
a housing;
the winding core is arranged in the shell, and one end of the winding core is provided with a negative pole lug;
the bonding pad is attached to one end of the winding core and connected with the negative pole lug;
the top cover assembly is arranged at the end part of the shell and is provided with a cathode pole and an insulating cover plate, and the cathode pole penetrates through the insulating cover plate;
one end of the adapter sheet is connected with the bonding pad, and the other end of the adapter sheet is connected with the negative pole post so as to enable the negative pole post and the negative pole tab to be electrically conducted;
wherein, the adaptor piece includes the bending segment, electric core still includes the reinforcement, the reinforcement cladding in the bending segment, the width of adaptor piece is D1, the width of reinforcement is D2, the periphery diameter of insulating cover plate is D3, satisfies: d3 is more than or equal to D2 is more than or equal to D1/2.
2. The electric core of claim 1, wherein the interposer further comprises a first connecting section connected to the negative electrode post and a second connecting section connected to the negative electrode tab, the first connecting section and the second connecting section are arranged oppositely, a first transition section is connected between the first connecting section and the bending section, and a second transition section is connected between the second connecting section and the bending section.
3. The electrical core of claim 2, wherein a segment of the reinforcement is wrapped around the first transition segment and/or the second transition segment.
4. The cell of claim 2, wherein the thickness of the bend section is less than the thickness of the first connection section, or the thickness of the bend section is less than the thickness of the second connection section.
5. The cell of claim 2, wherein the reinforcement surrounds a peripheral wall of the bend segment.
6. The electrical core of claim 1, wherein the interposer is configured as a resilient metal member.
7. The battery core according to claim 1, wherein the other end of the winding core further has a positive electrode tab and a positive electrode adapter sheet, and the positive electrode adapter sheet covers the positive electrode tab and is welded to the positive electrode tab, so as to connect the positive electrode adapter sheet and the winding core into a whole.
8. The cell of claim 1, wherein the reinforcement is a tape or a glue layer.
9. The cell of claim 1, wherein the reinforcement is a layer of mastic.
10. An energy storage device, comprising the cell of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121481762.XU CN215816085U (en) | 2021-06-30 | 2021-06-30 | Battery cell and energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121481762.XU CN215816085U (en) | 2021-06-30 | 2021-06-30 | Battery cell and energy storage device |
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| Publication Number | Publication Date |
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| CN215816085U true CN215816085U (en) | 2022-02-11 |
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| CN202121481762.XU Active CN215816085U (en) | 2021-06-30 | 2021-06-30 | Battery cell and energy storage device |
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| CN (1) | CN215816085U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023245431A1 (en) * | 2022-06-21 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electric device |
| WO2023246227A1 (en) * | 2022-06-21 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and electric device |
| WO2023246098A1 (en) * | 2022-06-21 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical device |
| US11894571B1 (en) | 2023-02-09 | 2024-02-06 | Shenzhen Hithium Energy Storage Technology Co., Ltd. | Adapter assembly, energy storage device, and power consuming apparatus |
-
2021
- 2021-06-30 CN CN202121481762.XU patent/CN215816085U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023245431A1 (en) * | 2022-06-21 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electric device |
| WO2023246227A1 (en) * | 2022-06-21 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and electric device |
| WO2023246098A1 (en) * | 2022-06-21 | 2023-12-28 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical device |
| US11894571B1 (en) | 2023-02-09 | 2024-02-06 | Shenzhen Hithium Energy Storage Technology Co., Ltd. | Adapter assembly, energy storage device, and power consuming apparatus |
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Address after: 361100 201-1, complex building 5, No. 11, Butang Middle Road, torch high tech Zone (Tongxiang) industrial base, Xiamen, Fujian Province Patentee after: Xiamen Haichen Energy Storage Technology Co.,Ltd. Address before: Room 201-2, Comprehensive Building 5#, No. 11, Butang Middle Road, Industrial Base, Xiamen Torch High-tech Zone (Tongxiang), Xiamen City, Fujian Province, 361012 Patentee before: Xiamen Haichen New Energy Technology Co.,Ltd. |