Collecting plate and battery monomer with same
By forming an inclined flow guide surface and flow guide groove on the side where the collecting disk is facing away from the electrode assembly, the residual problem of electrolyte is solved, and the full utilization of the electrolyte is achieved and the electrode assembly is better immersed.
Patent Information
- Application Number
- CN202323243988.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-29
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-11-29
AI Technical Summary
After the battery is injected, the electrolyte remains on the current collecting plate, making it difficult to fully utilize it.
A current collecting disk is designed, which forms a flow guide surface opposite to the electrode assembly, and the flow guide surface extends downward toward the circumference of the current collecting disk to prevent electrolyte from remaining, and further enhance the flow guide effect through the flow guide groove. Enable the electrolyte to better infiltrate the electrode assembly.
Effectively prevent the electrolyte from remaining on the current collecting plate, ensure that the electrolyte is fully utilized, and improve the wetting efficiency of the electrolyte.
Smart Images
Figure CN222214313U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a current collecting plate and a battery monomer having the same. Background Art
[0002] Full and ultimate utilization of resources is an effective way to maximize benefits. In the context of a market economy driven entirely by monetary value, all industries and sectors are doing their utmost to improve the efficient use of various resources.
[0003] After the battery is filled, part of the electrolyte injected into the battery will remain on the current collecting plate of the battery and cannot be used, making it difficult to fully utilize the electrolyte. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a current collecting plate, which can well prevent the electrolyte from remaining thereon, so that the electrolyte in the battery can be fully utilized.
[0005] The utility model also provides a battery monomer having the current collecting plate.
[0006] According to the first aspect of the present invention, the current collecting plate is used for a battery cell, and has a guide surface formed on a side of the current collecting plate away from the electrode assembly of the battery cell, and is formed as an inclined surface extending downwardly toward the periphery of the current collecting plate.
[0007] According to the current collecting plate of the utility model, a guide surface is formed on the side of the current collecting plate away from the electrode assembly, and the guide surface extends downwardly toward the circumference of the current collecting plate, so that the electrolyte injected into the battery cell is not easy to remain on the current collecting plate, so that the electrolyte can be more fully utilized and the electrolyte can better infiltrate the electrode assembly.
[0008] In some embodiments of the present invention, the angle between the guide surface and the horizontal direction is greater than 0° and less than or equal to 20°.
[0009] In an embodiment of the present invention, the angle between the guide surface and the horizontal direction is 10°-20°.
[0010] In some embodiments of the present invention, a surface of the current collecting plate facing away from the electrode assembly is a first surface, and at least a portion of the first surface is formed as the guide surface.
[0011] In one embodiment of the present invention, the first surface further comprises: a connection surface for connecting a pole, the connection surface is formed in the middle of the collecting plate, the guide surface is connected to the connection surface and extends in a ring shape along the circumference of the connection surface.
[0012] In some examples of the present invention, the connection surface is a plane perpendicular to the thickness direction of the collecting plate.
[0013] In some embodiments of the present invention, a guide groove is formed on the side of the current collecting disk facing away from the electrode assembly, and the guide groove extends radially outward of the current collecting disk. In the radial outward direction of the current collecting disk, the bottom wall of the guide groove extends downwardly inclined to form at least part of the guide surface.
[0014] In one embodiment of the present invention, the number of the guide grooves is one or more. When the number of the guide grooves is plural, the guide grooves are arranged at intervals along the circumference of the collecting plate.
[0015] In some embodiments of the present invention, the thickness of the collecting plate is 2 mm-3 mm.
[0016] A battery cell according to a second aspect of the present invention comprises the current collecting plate according to the first aspect of the present invention, and the battery cell is a cylindrical battery.
[0017] According to the battery cell of the utility model, by setting the current collecting plate of the first aspect mentioned above, a guide surface is formed on the side of the current collecting plate away from the electrode assembly, and the guide surface extends downwardly and obliquely toward the circumference of the current collecting plate, so that the electrolyte injected into the battery cell is not easy to remain on the current collecting plate, so that the electrolyte can be more fully utilized and the electrolyte can better infiltrate the electrode assembly.
[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a schematic diagram of a current collecting plate according to an embodiment of the utility model;
[0020] Figure 2 It is a cross-sectional view of a current collecting plate according to an embodiment of the utility model.
[0021] Reference numerals:
[0022] 10. first surface; 11. flow guide surface; 12. connection surface;
[0023] 20. second surface;
[0024] 100. Collecting plate. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0026] First, refer to Figure 1 and Figure 2 A battery cell according to an embodiment of the second aspect of the present invention is briefly described. A current collecting plate 100 is provided in the battery cell. The current collecting plate 100 is provided in the battery cell for electrically connecting with a pole and a plurality of pole ears of an electrode assembly.
[0027] Reference below Figure 1 and Figure 2 The current collecting plate 100 according to the first embodiment of the present invention is described.
[0028] like Figure 1 and Figure 2 As shown, according to the current collecting plate 100 of the first embodiment of the utility model, the current collecting plate 100 is used for a battery cell, and the current collecting plate 100 has a guide surface 11, which is formed on the side of the current collecting plate 100 away from the electrode assembly of the battery cell, and the guide surface 11 is formed toward the periphery of the current collecting plate 100 and downward (such as Figure 2 An inclined surface extending obliquely (in the up and down directions shown).
[0029] In the present embodiment, a guide surface 11 is formed on the side of the current collecting plate 100 facing away from the electrode assembly. The guide surface 11 is inclined downward toward the circumference of the current collecting plate 100, so that the electrolyte can flow along the guide surface 11 of the current collecting plate 100 to the electrode assembly to infiltrate the electrode assembly. The guide surface 11 is an inclined surface, which makes it difficult for the electrolyte to accumulate and remain on the current collecting plate 100, so that the electrolyte injected into the battery cell can be more fully utilized and the electrolyte can better infiltrate the electrode assembly.
[0030] According to the current collecting plate 100 of the embodiment of the utility model, a guide surface 11 is formed on the side of the current collecting plate 100 away from the electrode assembly, and the guide surface 11 extends downwardly and obliquely toward the circumference of the current collecting plate 100, so that the electrolyte injected into the battery cell is not easy to remain on the current collecting plate 100, so that the electrolyte can be more fully utilized and the electrolyte can better infiltrate the electrode assembly.
[0031] In one embodiment of the present invention, reference Figure 2 As shown, the guide surface 11 is in the thickness direction of the collecting plate 100 (eg Figure 2The cross section in the vertical direction shown in the figure can be a straight line. This makes the guide surface 11 of the collecting plate 100 easier to process.
[0032] In one embodiment of the present invention, reference Figure 2 As shown, the cross section of the guide surface 11 in the thickness direction of the collector plate 100 can be an arc. Specifically, the arc can be convex or concave. This can reduce the use of materials of the collector plate 100 to a certain extent, thereby reducing the material cost of the collector plate 100.
[0033] In some embodiments of the present invention, reference Figure 2 As shown, the angle between the guide surface 11 and the horizontal direction can be greater than 0° and less than or equal to 20°.
[0034] In this embodiment, the angle between the guide surface 11 and the horizontal direction is limited to greater than 0°, so that the guide surface 11 can form a good inclined surface so that the electrolyte can smoothly flow along the guide surface 11 to the electrode assembly. It can be understood that the angle between the guide surface 11 and the horizontal direction is limited by the thickness and size of the collector plate 100. In this embodiment, the angle between the guide surface 11 and the horizontal direction is limited to less than or equal to 20°, which can well meet the processing and manufacturing requirements of the collector plate 100, so that the collector plate 100 can perform electrical connection operations well. For example, Figure 2 As shown, the angle α in the figure represents the angle between the guide surface 11 and the horizontal direction, and the angle α can be 5°, 10°, 15°, 20°, etc.
[0035] In one embodiment of the present invention, reference Figure 2 As shown, the angle between the guide surface 11 and the horizontal direction can be 10°-20°.
[0036] In this embodiment, the angle between the guide surface 11 and the horizontal direction is further limited to between 10° and 20°, so that the guide surface 11 has a good inclination angle to stably and reliably guide the electrolyte to the electrode assembly, thereby well avoiding the electrolyte residue on the collector plate 100, so that the electrolyte is fully utilized. For example, the angle between the guide surface 11 and the horizontal direction can be 10°, 12°, 14°, 16°, 18°, 20°, etc. Preferably, the angle between the guide surface 11 and the horizontal direction is 15°.
[0037] In some embodiments of the present invention, Figure 2 As shown, a surface of the current collecting plate 100 facing away from the electrode assembly may be a first surface 10 , and at least a portion of the first surface 10 is formed as a flow guiding surface 11 .
[0038] In this embodiment, at least part of the first surface 10 is formed as the guide surface 11, that is, the first surface 10 can be partially or entirely formed as the guide surface 11. In this embodiment, the guide surface 11 is at least partially formed on the surface of the side of the current collecting plate 100 away from the electrode assembly, which has a simple structure and can well play the role of guiding the electrolyte.
[0039] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the first surface 10 may further include: a connection surface 12 for connecting a pole, the connection surface 12 is formed in the middle of the collecting plate 100 , and the guide surface 11 is connected to the connection surface 12 and extends in a ring shape along the circumference of the connection surface 12 .
[0040] In this embodiment, a connection surface 12 is formed in the middle of the current collecting plate 100, so that the current collecting plate 100 and the pole are conveniently connected by welding. The guide surface 11 is connected to the connection surface 12 and extends in a ring shape along the circumference of the connection surface 12, so that the guide surface 11 can always play a good guiding role in the circumference of the current collecting plate 100, reliably avoiding the accumulation and residue of the electrolyte on the current collecting plate 100, so that the electrolyte can be better utilized.
[0041] In some examples of the present invention, Figure 2 As shown, the connection surface 12 may be a plane perpendicular to the thickness direction of the current collecting plate 100. This makes it easier to weld and fix with the pole.
[0042] In some examples of the present invention, Figure 2 As shown, the surface of the current collecting plate 100 facing the electrode assembly can be formed as a second surface 20, and the second surface 20 is a plane perpendicular to the thickness direction of the current collecting plate 100. This makes it easier to weld the current collecting plate 100 to the multiple tabs of the electrode assembly.
[0043] In some embodiments of the present invention, reference Figure 2 As shown, a guide groove may be formed on the side of the current collecting plate 100 facing away from the electrode assembly, and the guide groove extends radially outward of the current collecting plate 100. In the radial outward direction of the current collecting plate 100, the bottom wall of the guide groove extends downwardly inclined to form at least a portion of the guide surface 11.
[0044] In this embodiment, a guide groove is formed on the side of the current collecting plate 100 facing away from the electrode assembly, which can further enhance the guide effect of the current collecting plate 100. The electrolyte can flow from the guide surface 11 to the electrode assembly or flow from the guide surface 11 into the guide groove and then flow along the guide groove to the electrode assembly, thereby better preventing the electrolyte from accumulating and remaining on the current collecting plate 100, so that the electrolyte can be more fully utilized. Optionally, the angle between the bottom wall of the guide groove and the horizontal direction can be greater than the angle between the guide surface 11 and the horizontal direction, so that the guide groove has a better guide effect. Furthermore, the groove width of the guide groove can be set to be equal in width in the radial direction of the current collecting plate 100 or can be enlarged piece by piece, so that the guide groove can be flexibly set as needed.
[0045] In one embodiment of the present invention, reference Figure 2 As shown, the number of the guide grooves may be one or more. When the number of the guide grooves is plural, the guide grooves are arranged at intervals along the circumference of the current collecting plate 100 .
[0046] In the present embodiment, a plurality of guide grooves are provided, which can further enhance the guiding effect of the guide grooves on the electrolyte, and better avoid the accumulation and residue of the electrolyte on the collecting plate 100, so that the electrolyte can be better and fully utilized.
[0047] In some embodiments of the present invention, the thickness of the collecting plate 100 is 2 mm-3 mm.
[0048] In this way, the collector plate 100 has sufficient structural strength to be welded and fixed with the pole lugs and poles, and the collector plate 100 has a smaller thickness so that a larger arrangement space for the electrode assembly is provided in the battery cell, and the battery cell has a good energy density. For example, the collector plate 100 may have a thickness of 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, and the like.
[0049] Reference below Figure 1 and Figure 2 A battery cell according to an embodiment of the second aspect of the utility model is described.
[0050] like Figure 1 and Figure 2 As shown, other structures and operations of the battery cell according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.
[0051] According to the battery cell of the embodiment of the utility model, by setting the collecting plate 100 of the above-mentioned first aspect embodiment, a guide surface 11 is formed on the side of the collecting plate 100 away from the electrode assembly, and the guide surface 11 extends downwardly and obliquely toward the circumference of the collecting plate 100, so that the electrolyte injected into the battery cell is not easy to remain on the collecting plate 100, so that the electrolyte can be more fully utilized and the electrolyte can better infiltrate the electrode assembly.
[0052] The following will refer to Figure 1 and Figure 2 A battery cell according to a specific embodiment of the present invention is described.
[0053] like Figure 1 and Figure 2 As shown, the battery cell is a cylindrical battery. The battery cell includes an electrode assembly, a current collecting plate 100 and a pole. The current collecting plate 100 can be manufactured by processing aluminum. The upper surface of the current collecting plate 100 is set away from the battery cell, and the upper surface forms a guide surface 11 and a connecting surface 12. The connecting surface 12 is located in the middle of the upper surface and is a horizontally arranged plane. The connecting surface 12 is circular to match the bottom surface of the pole. Specifically, the current collecting plate 100 of this embodiment is used to connect to the positive pole of the battery cell, and the bottom of the positive pole is connected to the connecting surface 12; the guide surface 11 is connected to the peripheral edge of the connecting surface 12 as a whole and extends in a ring shape along the circumference of the connecting surface 12. The guide surface 11 extends from the middle to the surroundings and downward to form an inclined surface; the lower surface of the current collecting plate 100 is a horizontally arranged plane.
[0054] According to the battery cell of the embodiment of the utility model, a guide surface 11 is formed on the side of the collecting plate 100 away from the electrode assembly, and the guide surface 11 extends downwardly and obliquely toward the circumference of the collecting plate 100, so that the electrolyte injected into the battery cell is not easy to remain on the collecting plate 100, so that the electrolyte can be more fully utilized and the electrolyte can better infiltrate the electrode assembly.
[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A current collecting plate for a battery cell, characterized in that: The current collecting plate has a guide surface formed on a side of the current collecting plate away from the electrode assembly of the battery cell, and the guide surface is formed as an inclined surface extending downwardly toward the periphery of the current collecting plate.
2. The collecting plate according to claim 1, characterized in that: The included angle between the guide surface and the horizontal direction is greater than 0° and less than or equal to 20°.
3. The collecting plate according to claim 2, characterized in that: The included angle between the guide surface and the horizontal direction is 10°-20°.
4. The collecting plate according to claim 1, characterized in that: A surface of the current collecting plate facing away from the electrode assembly is a first surface, and at least a portion of the first surface is formed as the flow guide surface.
5. The collecting plate according to claim 4, characterized in that: The first surface further comprises: a connection surface for connecting a pole, the connection surface is formed in the middle of the current collecting plate, the flow guiding surface is connected to the connection surface and extends in a ring shape along the circumference of the connection surface.
6. The collecting plate according to claim 5, characterized in that: The connecting surface is a plane perpendicular to the thickness direction of the collecting plate.
7. The collecting plate according to any one of claims 1 to 6, characterized in that: A guide groove is formed on one side of the current collecting disk away from the electrode assembly, and the guide groove extends radially outward of the current collecting disk. In the radial outward direction of the current collecting disk, the bottom wall of the guide groove extends downwardly and obliquely to form at least part of the guide surface.
8. The collecting plate according to claim 7, characterized in that: The number of the guide grooves is one or more. When the number of the guide grooves is plural, the guide grooves are arranged at intervals along the circumferential direction of the current collecting plate.
9. The collecting plate according to claim 1, characterized in that: The thickness of the collecting plate is 2mm-3mm.
10. A battery cell, characterized in that: It comprises the current collecting plate according to any one of claims 1 to 9, wherein the battery cell is a cylindrical battery.