Battery cell and power device
By setting positive and negative pole columns on both sides of the thickness direction of the battery cell, the problem of high production costs of existing battery cells is solved, and the number of parts and production costs is reduced, and the overall performance and safety performance are improved.
Patent Information
- Application Number
- CN202421974746.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The production cost of existing battery cells is high, resulting in high production cost of the whole vehicle or low configuration of the whole vehicle.
By setting positive and negative electrode columns on both sides of the thickness direction of the battery cell, the number of parts is reduced, the production process flow is reduced, and material costs and labor costs are reduced.
The number of battery cell parts has been reduced, production costs have been reduced, overall performance and safety performance have been improved, and the production costs of the whole vehicle have been reduced.
Smart Images
Figure CN223006953U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery manufacturing, and in particular to a battery cell and a power device. Background Art
[0002] It is pointed out in the related art that the development of new energy vehicles is changing with each passing day. Since the cost of battery cells accounts for 40%-60% of the total vehicle cost, the cost of battery cells lies in the cost of components themselves and labor costs. The high production cost of battery cells leads to high production cost of the whole vehicle or low vehicle configuration. Content of the Utility Model
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides a battery cell with fewer components and lower production cost.
[0004] The utility model also provides a power device with the above battery cell.
[0005] The battery cell according to the first aspect of the utility model includes: a housing, an accommodation cavity is formed in the housing; a pole group, the pole group is arranged in the accommodation cavity; a positive pole column and a negative pole column, the positive pole column and the negative pole column are respectively arranged on both sides of the battery cell in the thickness direction, and both the positive pole column and the negative pole column are electrically connected to the pole group.
[0006] According to the battery cell of the utility model, by arranging pole columns on both sides of the battery cell in the thickness direction, there is no need to arrange a bus bar, the number of components of the battery cell is reduced, the weight of the battery cell is reduced, and there is no need for other assembly production processes, so the production process is reduced, thereby reducing the material cost and labor cost of the battery cell.
[0007] In some embodiments, the positive pole column is connected to the positive pole tab of the pole group through a first welding piece, or the negative pole column is connected to the negative pole tab of the pole group through a second welding piece.
[0008] In some embodiments, the positive pole column is welded to the housing, and / or the negative pole column is welded to the housing.
[0009] In some embodiments, the first welding piece is a copper piece, and / or the second welding piece is an aluminum piece.
[0010] In some embodiments, the battery cell further includes: a support member, the support member is oppositely arranged with the positive pole column and the negative pole column in the thickness direction of the battery cell, and the support member is spaced apart from the pole column on the same side.
[0011] In some embodiments, the battery cell further includes a buffer assembly disposed on both side surfaces of the battery cell in the thickness direction. The buffer assembly includes: a first buffer member and a second buffer member. The first buffer member extends circumferentially around one side surface of the battery cell where it is located, and the second buffer member is disposed inside the circumferential direction of the first buffer member. In some embodiments, the first buffer member is a foam, and / or the second buffer member is an aerogel.
[0012] In some embodiments, the thickness of the positive electrode post is 1 mm - 2 mm, and / or the thickness of the negative electrode post is 1 mm - 2 mm, and / or the thickness of the support member is 1 mm - 2 mm.
[0013] In some embodiments, the battery cell further includes: an explosion-proof valve disposed on at least one side in the height direction of the battery cell.
[0014] The power device according to the second aspect of the present invention includes the battery cell according to the first aspect of the present invention above.
[0015] By providing the battery cell according to the first aspect, the overall performance of the power device is improved, the safety performance of the power device is enhanced, and the cost of the power device is reduced.
[0016] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of a battery cell according to an embodiment of the present invention;
[0018] Figure 2 is Figure 1 a schematic diagram of the battery cell shown in another angle;
[0019] Figure 3 is Figure 2 a schematic diagram of the battery cell shown in yet another angle;
[0020] Figure 4 is Figure 3 a schematic diagram of the battery cell shown in, where the buffer assembly is disposed on the battery cell.
[0021] REFERENCE SIGNS:
[0022] 100, battery cell; 1, housing; 2, positive electrode post; 3, negative electrode post; 4, support member; 5, buffer assembly; 51, first buffer member; 52, second buffer member; 6, explosion-proof valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, but should not be construed as limiting the present utility model.
[0024] Reference will be made below to Figures 1 - 4 describe the battery cell 100 according to an embodiment of the first aspect of the present utility model.
[0025] As Figures 1 - 4 shown, the battery cell 100 according to an embodiment of the first aspect of the present utility model includes: a housing 1, a pole group, a positive electrode terminal 2, and a negative electrode terminal 3.
[0026] Specifically, a receiving cavity is formed in the housing 1, the pole group is disposed in the receiving cavity, the positive electrode terminal 2 and the negative electrode terminal 3 are respectively disposed on both sides in the thickness direction of the battery cell 100, and both the positive electrode terminal 2 and the negative electrode terminal 3 are electrically connected to the pole group. Thus, the structure of the battery cell 100 is simple and ingeniously designed, reducing the number of components of the battery cell 100.
[0027] For the battery cell according to an embodiment of the present utility model, by disposing the electrode terminals on both sides in the thickness direction of the battery cell 100, there is no need to provide a bus bar, reducing the number of components of the battery cell 100, reducing the weight of the battery cell 100, and there is no need for other assembly production processes, reducing the production process flow, thereby reducing the material cost and labor cost of the battery cell 100.
[0028] In some embodiments of the present utility model, the positive electrode terminal 2 is connected to the positive electrode tab of the pole group through a first welding piece, or the negative electrode terminal 3 is connected to the negative electrode tab of the pole group through a second welding piece. That is to say, the first welding piece and the second welding piece not only play a connecting role, but also can serve as conductors for current transmission to ensure that current can smoothly be transmitted from the pole group to the positive electrode terminal 2 or the negative electrode terminal 3 of the battery cell 100.
[0029] In some embodiments of the present utility model, the housing 1 may be a neutral housing 1, and there is no electrical conductivity between the electrode terminal and the housing 1. The housing 1 may also be electrically conductive with the electrode terminal. Then, the positive electrode terminal 2 is welded to the housing 1, and / or the negative electrode terminal 3 is welded to the housing 1.
[0030] Preferably, the first welding piece is a copper part, and the second welding piece is an aluminum part.
[0031] In some embodiments of the present utility model, as Figure 1As shown, the battery cell 100 further includes: a support member 4. The support member 4 is disposed opposite to the positive electrode terminal 2 and the negative electrode terminal 3 respectively in the thickness direction of the battery cell 100, and the support member 4 is spaced apart from the electrode terminal on the same side. That is to say, the support member 4 cooperates with the electrode terminal to ensure the structural stability of the battery cell 100 and prevent contact or impact between the battery cells 100.
[0032] In some embodiments of the present utility model, as Figure 4 shown, the battery cell 100 further includes a buffer assembly 5. The buffer assembly 5 is disposed on both surface sides in the thickness direction of the battery cell 100. The buffer assembly 5 includes: a first buffer member 51 and a second buffer member 52. The first buffer member 51 extends circumferentially around one surface side of the battery cell 100 where it is located, and the second buffer member 52 is disposed inside the circumference of the first buffer member 51. Thus, the buffer assembly 5 can meet the requirements of the pole group cyclic expansion, and the buffer assembly 5 absorbs vibrations and impact forces, reducing the physical contact between the battery cells 100, thereby reducing the risk of damage caused by collision or vibration.
[0033] Preferably, the first buffer member 51 is a foam, and / or the second buffer member 52 is an aerogel.
[0034] In some embodiments of the present utility model, the thickness of the positive electrode terminal 2 is 1 mm - 2 mm, and / or the thickness of the negative electrode terminal 3 is 1 mm - 2 mm, and / or the thickness of the support member 4 is 1 mm - 2 mm. For example, the thickness of the positive electrode terminal 221 can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc.; the thickness of the negative electrode terminal 322 can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc.; the thickness of the support member 43 can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc.
[0035] In some embodiments of the present utility model, the battery cell 100 further includes: an explosion-proof valve 6. The explosion-proof valve 6 is disposed on at least one side in the height direction of the battery cell 100. Thus, the structure of the battery cell 100 is simplified, and the safety performance of the battery cell 100 is improved.
[0036] The power device according to the second aspect embodiment of the present utility model includes the battery cell 100 according to the first aspect embodiment of the present utility model above.
[0037] According to the power device of the embodiment of the present utility model, by providing the battery cell 100 of the embodiment of the first aspect above, the overall performance of the power device is improved, the safety performance of the power device is enhanced, and the cost of the power device is reduced.
[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.
[0040] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0041] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0042] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.
Claims
1. A battery cell, characterized in that: include: A housing having a receiving cavity formed therein; A pole group, the pole group is arranged in the accommodating cavity; A positive electrode column and a negative electrode column, wherein the positive electrode column and the negative electrode column are respectively arranged on both sides of the battery cell in the thickness direction, and the positive electrode column and the negative electrode column are both electrically connected to the electrode group.
2. The battery cell according to claim 1, characterized in that: The positive electrode column is connected to the positive electrode tab of the electrode group via a first welding sheet, and / or the negative electrode column is connected to the negative electrode tab of the electrode group via a second welding sheet.
3. The battery cell according to claim 2, characterized in that: The positive electrode column is connected to the shell by welding, or the negative electrode column is connected to the shell by welding.
4. The battery cell according to claim 2, characterized in that: The first welding plate is a copper part, and / or the second welding plate is an aluminum part.
5. The battery cell according to any one of claims 1 to 4, characterized in that: Also includes: A support member is disposed opposite to the positive electrode column and the negative electrode column in the thickness direction of the battery cell, and the support member is spaced apart from the electrode column on the same side.
6. The battery cell according to any one of claims 1 to 4, characterized in that: It also includes a buffer component, which is arranged on both side surfaces of the battery cell in the thickness direction. The buffer component includes: a first buffer part and a second buffer part, the first buffer part extends circumferentially around the side surface of the battery cell where it is located, and the second buffer part is arranged on the circumferential inner side of the first buffer part.
7. The battery cell according to claim 6, characterized in that: The first buffer component is foam, and / or the second buffer component is aerogel.
8. The battery cell according to claim 5, characterized in that: The thickness of the positive electrode column is 1 mm-2 mm, and / or the thickness of the negative electrode column is 1 mm-2 mm, and / or the thickness of the support member is 1 mm-2 mm.
9. The battery cell according to any one of claims 1 to 4, characterized in that: Also includes: An explosion-proof valve is provided on at least one side of the battery cell in a height direction.
10. A power device, characterized in that: A battery cell comprising the battery cell according to any one of claims 1 to 9.