Battery cell

Abstract

The utility model provides a battery cell, a top patch is arranged on a cover plate of the battery cell, and the top patch comprises a top patch body and a polarity identifier arranged on the top patch body; one side of the top patch body is connected with the cover plate, the polarity identifier is arranged on the other side of the top patch body, a first through hole is formed in the top patch body, and a pole of the battery cell is arranged in the first through hole in a penetrating manner; a preset distance is formed between the edge of the top patch body and the edge of the cover plate, a preset gap is formed between the pole and the edge of the first through hole, and the preset distance is the same as the preset gap. According to the battery cell disclosed by the utility model, the polarity identifier is arranged on the other side of the side, connected with the cover plate, of the top patch body, so that the insulation performance of the top patch is ensured while the positive electrode and the negative electrode of a battery are conveniently distinguished, and the edge of the top patch and the edge of the cover plate are kept at a preset distance.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, in particular to a battery core. Background Art

[0002] In the prior art, a top patch is often provided on the cell cover plate to provide insulation protection for the cell cover plate. However, due to the limitation of the existing setting method of the top patch, the insulation protection effect is limited and it is not conducive to the assembly of the cell. In order to distinguish the positive and negative poles of the battery, a polarity mark showing the polarity of the pole is often provided on the top patch to facilitate subsequent wiring operations. However, after the polarity mark is set, it is easy to cause the blue film wrapped around the side of the cell to be exposed, thereby affecting the appearance of the battery, and the setting of the positive and negative pole marks also has the risk of causing insulation failure of the cover plate. Utility Model Content

[0003] In view of this, the utility model aims to provide a battery cell to optimize the structure of the top patch.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A battery cell, wherein a top patch is provided on a cover plate of the battery cell, wherein the top patch comprises a top patch body and a polarity mark provided on the top patch body;

[0006] One side of the top patch body is connected to the cover plate, the polarity mark is arranged on the other side of the top patch body, a first through hole is arranged on the top patch body, and the pole of the battery cell is passed through the first through hole;

[0007] There is a preset distance between the edge of the top patch body and the edge of the cover plate, and there is a preset gap between the pole and the edge of the first through hole.

[0008] Furthermore, the preset distance is the same as the preset gap.

[0009] Furthermore, the preset distance and the preset gap are both between 0.3 mm and 1.5 mm.

[0010] Furthermore, the polarity mark is formed on the top patch body by a printing process;

[0011] And / or, the thickness of the top patch body is between 1mm-2mm, the depression depth of the polarity mark relative to the top patch body is not greater than 0.9mm, or the protrusion height of the polarity mark relative to the top patch body is not greater than 0.5mm.

[0012] Furthermore, the top of the polarity mark is flush with the top patch body, and the thickness of the top patch body is between 0.1 mm and 1 mm.

[0013] Furthermore, the top patch body and the polarity mark have different colors.

[0014] Furthermore, the distance between the polarity mark and the edge of the first through hole is not less than 1 mm.

[0015] Furthermore, the top patch is provided with a second through hole and / or a third through hole, the second through hole is arranged corresponding to the QR code on the cover plate, and the third through hole is for the explosion-proof valve of the battery cell to pass through;

[0016] The distances between the polarity mark and the edges of the second through hole and the third through hole are not less than 1 mm.

[0017] Furthermore, the top patch is provided with an avoidance hole, the avoidance hole is used to avoid the sensor of the battery cell, and the distance between the polarity mark and the edge of the avoidance hole is not less than 1 mm.

[0018] Furthermore, the top patch is made of PC, PP or PET.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The battery cell of the utility model is convenient for distinguishing the positive and negative poles of the battery by arranging the polarity mark on the other side of the top patch body connected to the cover plate, which is conducive to ensuring the insulation performance of the top patch and has good practicality. In addition, by making the edge of the top patch have a preset distance with the edge of the cover plate, and making the pole and the edge of the first through hole have a preset gap, it is convenient for assembling the battery and is conducive to achieving coverage of a larger area on the cover plate, and has good insulation protection performance.

[0021] In addition, by setting the preset distance and the preset gap between 0.3mm-1.5mm, it is convenient to assemble the top patch on the cover plate, and it is also beneficial for the top patch to cover a larger area of ​​the cover plate, thereby having better insulation protection performance.

[0022] In addition, the top patch body and the polarity mark are made different in color, so that the top patch body and the polarity mark can be easily distinguished. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 It is a structural schematic diagram of one form of the top patch described in an embodiment of the utility model;

[0025] Figure 2 It is a schematic structural diagram of another form of the top patch according to an embodiment of the utility model;

[0026] Figure 3 It is a structural schematic diagram of another form of the top patch described in the embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 1. Top patch body; 2. Polarity mark; 3. First through hole; 4. Second through hole; 5. Third through hole; 6. Avoidance hole. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" 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 or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0033] This embodiment relates to a battery cell, such as Figure 1As shown in the figure, a top patch is provided on the cover plate of the battery cell, and the top patch includes a top patch body 1 and a polarity mark 2 provided on the top patch body 1. One side of the top patch body 1 is connected to the cover plate, and the polarity mark 2 is provided on the other side of the top patch body 1. A first through hole 3 is provided on the top patch body 1, and the pole of the battery cell is passed through the first through hole 3. There is a preset distance between the edge of the top patch body 1 and the edge of the cover plate, and there is a preset gap between the pole and the edge of the first through hole 3.

[0034] It can be understood that by arranging the polarity mark 2 on the other side of the top patch body 1 connected to the cover plate, it is convenient to distinguish the positive and negative poles of the battery, and it is beneficial to ensure the insulation performance of the top patch, which has good practicality. And by making the edge of the top patch have a preset distance with the edge of the cover plate, and making the pole and the edge of the first through hole 3 have a preset gap, it is convenient to assemble the battery and it is beneficial to achieve a larger area coverage on the cover plate.

[0035] Based on the above overall introduction, as a preferred implementation, in this embodiment, the preset distance and the preset gap are the same size, so that it is convenient to assemble the top patch on the cover plate. In addition, it is preferred that the preset distance and the preset gap are both between 0.3mm-1.5mm, which can be specifically 0.3mm, 0.5mm, 0.8mm, 1mm and 1.5mm. By setting the preset distance and the preset gap within the above-mentioned size range, it is convenient to assemble the top patch on the cover plate, and it is conducive to the top patch covering a larger area of ​​the cover plate, so as to have better insulation protection performance.

[0036] Preferably, in this embodiment, the polarity mark 2 is formed on the top patch body 1 by a printing process. The thickness of the top patch body 1 is between 1 mm and 2 mm, and the depression depth of the polarity mark 2 relative to the top patch body 1 is not greater than 0.9 mm, or the protrusion height of the polarity mark 2 relative to the top patch body 1 is not greater than 0.5 mm.

[0037] Specifically, when the polarity mark 2 is formed on the top patch body 1 by a laser engraving process in a printing process, the polarity mark 2 can be recessed relative to the top patch body 1. When the polarity mark 2 is formed on the top patch body 1 by a printing process that requires a coating, the polarity mark 2 can be protruded relative to the top patch body 1. Of course, the polarity mark 2 is not limited to the forming method of laser engraving or printing process. In addition, the polarity mark 2 can also be set on the surface of the top patch body 1 by other methods commonly used in the prior art, such as using a separately set polarity mark 2 directly set on the top patch body 1. In addition, in other embodiments, the thickness of the top patch body 1 can also be selected to be set at other sizes. In this case, the recessed depth or protruding height of the polarity mark 2 relative to the top patch body 1 can also be adaptively adjusted.

[0038] In addition, the thickness of the top patch can be specifically 1mm, 1.3mm, 1.5mm, 1.8mm, 2mm, etc. In addition, if the polarity mark 2 is recessed relative to the top patch body 1, the recessed depth can be specifically 0.9mm, 0.7mm, 0.3mm, 0.1mm, etc. And, when the polarity mark 2 is protruding relative to the top patch body 1, the protruding height can be 0.1mm, 0.25mm, 0.3mm, 0.4mm, 0.5mm, etc. And when the polarity mark 2 is protruding relative to the top patch body 1, the bottom of the polarity mark 2 can be flush with the surface of the top patch body 1, or it can be set lower than the surface of the top patch body 1.

[0039] As a preferred implementation, the top of the polarity mark 2 can be flush with the top patch body 1, and the thickness of the top patch body 1 is between 0.1mm and 1mm, and the thickness of the top patch body 1 can be specifically 0.1mm, 0.3mm, 0.5mm, 0.7mm and 1mm, etc., so that the thickness of the top patch is thinner and the cost is lower. In specific implementation, a groove can be first processed on the top patch body 1, and then the polarity mark 2 is set in the groove.

[0040] Preferably, in this embodiment, the top patch body 1 and the polarity mark 2 have different colors. This arrangement facilitates the distinction between the top patch body 1 and the polarity mark 2. In specific implementation, the color of the top patch body 1 can be set to black, and the color of the polarity mark 2 can be set to white. Of course, in other embodiments, the top patch body 1 and the polarity mark 2 can also be set to other colors, so that the colors of the top patch body 1 and the polarity mark 2 are different.

[0041] As a preferred implementation, in this embodiment, the distance between the polarity mark 2 and the edge of the first through hole 3 is not less than 1 mm, and the distance between the polarity mark 2 and the edge of the first through hole 3 can be 1 mm, 1.5 mm, 2 mm, etc. By making the distance between the polarity mark 2 and the edge of the first through hole 3 not less than 1 mm, it is helpful to prevent the polarity mark 2 from being connected to the edge of the first through hole 3 during the use of the top patch body, thereby affecting the normal use of the top patch.

[0042] As a preferred example, Figure 1As shown in, in this embodiment, a second through hole 4 and a third through hole 5 are provided on the top patch, the second through hole 4 corresponds to the QR code setting on the cover plate, and the third through hole 5 allows the explosion-proof valve of the power core to pass through. The distance between the polarity mark 2 and the edges of the second through hole 4 and the third through hole 5 is not less than 1 mm. By providing the second through hole 4 and the third through hole 5, it is convenient to reveal the QR code on the cover plate. And in the specific implementation, relevant information of the battery can be stored on the QR code to facilitate the staff to obtain the battery information. By making the distance between the polarity mark 2 and the edges of the second through hole 4 and the third through hole 5 not less than 1 mm, it is convenient to prevent the second through hole 4 or the third through hole 5 from being connected to the polarity mark 2, thereby affecting the normal use of the top patch.

[0043] It is worth noting that in this embodiment, the second through hole 4 and the third through hole 5 are provided at the same time, which is only a preferred implementation mode. In addition, in other embodiments, only the second through hole 4 or only the third through hole 5 can be provided according to design requirements.

[0044] As a preferred embodiment, a avoidance hole 6 is provided on the top patch, and the avoidance hole 6 is used to avoid the sensor of the battery cell, and the distance between the polarity mark 2 and the edge of the avoidance hole 6 is not less than 1 mm. It should be noted that the above-mentioned sensor can be a temperature sensor commonly installed on existing batteries. By making the distance between the polarity mark 2 and the edge of the avoidance hole 6 not less than 1 mm, it is helpful to prevent the avoidance hole 6 from being connected to the polarity mark 2.

[0045] Preferably, in this embodiment, the top patch is made of PC, PP or PET, which is easy to obtain and has low cost. It is worth noting that the overall shape of the top patch can be set according to the shape of the cover plate, such as Figure 1 As shown in , when the cover plate is provided with positive and negative poles at the same time, the top patch body 1 may be provided with first through holes 3 for the positive pole and the negative pole to pass through. Figure 2 and Figure 3 As shown in FIG, when only the positive electrode column or the negative electrode column is provided on the cover plate, only the first through hole 3 for the positive electrode column or the negative electrode column to pass through may be provided on the top patch body 1.

[0046] The battery cell of this embodiment, by setting the polarity mark 2 on the other side of the top patch body 1 connected to the cover plate, is convenient for distinguishing the positive and negative poles of the battery, and is conducive to ensuring the insulation performance of the top patch, and has good practicality. And by making the edge of the top patch and the edge of the cover plate have a preset distance, it is convenient for assembling the battery and covering a larger area on the cover plate. And making the preset distance the same as the preset gap facilitates the assembly of the top patch on the cover plate.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cell, characterized in that: A top patch is provided on the cover plate of the battery cell, and the top patch includes a top patch body and a polarity mark provided on the top patch body; One side of the top patch body is connected to the cover plate, the polarity mark is arranged on the other side of the top patch body, a first through hole is arranged on the top patch body, and the pole of the battery cell is passed through the first through hole; There is a preset distance between the edge of the top patch body and the edge of the cover plate, and there is a preset gap between the pole and the edge of the first through hole.

2. The battery cell according to claim 1, characterized in that: The preset distance is the same as the preset gap.

3. The battery cell according to claim 1, characterized in that: The preset distance and the preset gap are both between 0.3 mm and 1.5 mm.

4. The battery cell according to claim 1, characterized in that: The polarity mark is formed on the top patch body by a printing process; And / or, the thickness of the top patch body is between 1mm-2mm, the depression depth of the polarity mark relative to the top patch body is not greater than 0.9mm, or the protrusion height of the polarity mark relative to the top patch body is not greater than 0.5mm.

5. The battery cell according to claim 1, characterized in that: The top of the polarity mark is flush with the top patch body, and the thickness of the top patch body is between 0.1 mm and 1 mm.

6. The battery cell according to claim 1, characterized in that: The top patch body and the polarity mark have different colors.

7. The battery cell according to claim 1, characterized in that: The distance between the polarity mark and the edge of the first through hole is not less than 1 mm.

8. The battery cell according to claim 1, characterized in that: The top patch is provided with a second through hole and / or a third through hole, the second through hole corresponds to the QR code on the cover plate, and the third through hole is for the explosion-proof valve of the battery cell to pass through; The distances between the polarity mark and the edges of the second through hole and the third through hole are not less than 1 mm.

9. The battery cell according to claim 1, characterized in that: The top patch is provided with an avoidance hole, the avoidance hole is used to avoid the sensor of the battery cell, and the distance between the polarity mark and the edge of the avoidance hole is not less than 1 mm.

10. The battery cell according to any one of claims 1 to 9, characterized in that: The top patch is made of PC, PP or PET.

Images