Battery cover plate and battery

Abstract

The utility model discloses a battery cover plate and a battery, the battery cover plate comprises a cover plate body and a positioning ring, and the cover plate body is provided with a pole hole; the positioning ring is arranged on one side of the cover plate body and surrounds the peripheral side of the pole hole, and part of the positioning ring extends to the pole hole in the radial direction of the pole hole, so that a limiting step is formed by the positioning ring and the pole hole. According to the battery cover plate disclosed by the utility model, the battery cover plate comprises the cover plate body and the positioning ring connected to one side of the cover plate body, part of the positioning ring extends to the pole hole along the radial direction of the pole hole so as to form a limiting step with the pole hole, and the pole penetrates through the pole hole, is matched with the limiting step and is used for limiting the mounting position of the pole; therefore, the accuracy of the pole mounting position is improved.

Description

Technical Field

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

[0002] As lithium-ion battery technology matures, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the performance and safety of lithium-ion batteries are increasing. In related technologies, the pole is inserted into the battery cover. When installing the pole, the pole is prone to displacement, resulting in inaccurate installation position of the pole. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cover plate, the battery cover plate is provided with a limiting step for limiting the installation position of the pole to improve the accuracy of the installation position of the pole.

[0004] The utility model also provides a battery with the battery cover plate.

[0005] According to the battery cover plate of the first aspect of the utility model, the cover plate includes: a cover plate body, the cover plate body has a pole hole; a positioning ring, the positioning ring is arranged on one side of the cover plate body, the positioning ring surrounds the outer peripheral side of the pole hole, and partially extends to the pole hole along the radial direction of the pole hole to construct a limiting step with the pole hole.

[0006] According to the battery cover of the embodiment of the utility model, the battery cover includes a cover body and a positioning ring connected to one side of the cover body, a portion of the positioning ring extends to the pole hole along the radial direction of the pole hole to construct a limiting step with the pole hole, the pole is passed through the pole hole and cooperates with the limiting step to limit the installation position of the pole to improve the accuracy of the pole installation position.

[0007] According to some embodiments of the present invention, in the axial direction of the pole hole, the thickness of the cover plate body is equal to the thickness of the positioning ring.

[0008] According to some embodiments of the present invention, the cover plate body and the positioning ring are an integrally formed part.

[0009] According to some embodiments of the present utility model, a positioning hole connected to the pole hole is defined in the positioning ring, and a cross-sectional area of ​​the positioning hole is larger than 1 / 2 of a cross-sectional area of ​​the pole hole.

[0010] According to some embodiments of the present invention, the positioning ring is located on a side of the cover body facing the pole group, or the positioning ring is located on a side of the cover body facing away from the pole group.

[0011] According to some embodiments of the utility model, the pole hole is a circular hole, and the positioning ring is a circular ring surrounding the pole hole; or, the pole hole is a square hole, and the positioning ring is a square ring surrounding the pole hole.

[0012] According to some embodiments of the present utility model, the positioning ring is a square ring surrounding the pole hole, and the corners of the square ring are arc transitions.

[0013] According to some embodiments of the utility model, the cover body is further provided with an explosion-proof hole, which is an elliptical hole, and the long axis of the explosion-proof hole extends along the width direction of the cover body, or the short axis of the explosion-proof hole extends along the width direction of the cover body.

[0014] According to some embodiments of the utility model, a groove is punched on the cover plate body, the opening of the groove is away from the side of the electrode group, and a liquid injection hole is provided on the bottom surface of the groove.

[0015] A battery according to an embodiment of the second aspect of the utility model includes: a battery cover according to an embodiment of the first aspect of the utility model.

[0016] According to the battery of the embodiment of the utility model, the battery cover is provided to limit the installation position of the pole, so as to improve the accuracy of the installation position of the pole; and the shapes of the pole hole and the positioning ring are limited, so that the position of the pole hole and the positioning ring on the battery cover can be reasonably arranged.

[0017] 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

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a battery cover according to a first embodiment of the utility model;

[0020] Figure 2 yes Figure 1 A top view of the middle battery cover;

[0021] Figure 3 yes Figure 2 Sectional view along line AA;

[0022] Figure 4 is a schematic diagram of a battery cover according to a second embodiment of the utility model;

[0023] Figure 5 yes Figure 4 A top view of the middle battery cover;

[0024] Figure 6 yes Figure 5 Sectional view along the midline BB;

[0025] Figure 7 is a schematic diagram of a battery cover according to a third embodiment of the utility model;

[0026] Figure 8 is a schematic diagram of a battery cover according to a fourth embodiment of the utility model;

[0027] Fig. 9 Schematic diagram of a battery cover according to a fifth embodiment of the present invention.

[0028] Reference numerals:

[0029] 10. Battery cover;

[0030] 1. Cover plate body; 11. Pole hole; 12. Explosion-proof hole; 13. Groove; 131. Liquid injection hole;

[0031] 2. Positioning ring; 21. Positioning hole; 22. Limiting step. DETAILED DESCRIPTION

[0032] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 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 utility model can be understood according to specific circumstances.

[0035] Reference below Figure 1-Figure 9 A battery cover 10 according to an embodiment of the present invention is described.

[0036] According to the battery cover 10 of the first embodiment of the utility model, the battery cover 10 includes a cover body 1, the cover body 1 has a pole hole 11, the pole hole 11 penetrates the cover body 1 along the thickness direction of the cover body 1, and the pole is penetrated through the pole hole 11 for electrically connecting with the pole ear of the pole group.

[0037] The battery cover 10 further includes a positioning ring 2, which is disposed on one side of the cover body 1. For example, the positioning ring 2 can be disposed on the side of the cover body 1 close to the pole group, or on the side of the battery cover 10 away from the pole group. The positioning ring 2 surrounds the outer peripheral side of the pole hole 11, and a portion of the positioning ring 2 extends to the pole hole 11 along the radial direction of the pole hole 11 to form a limiting step 22 with the pole hole 11. The positioning ring 2 can be a wall plate of the pole hole 11. A positioning hole 21 can be defined in the positioning ring 2, and the positioning hole 21 is connected with the pole hole 11. The pole can be inserted into the pole hole 11 and the positioning hole 21, and the pole can cooperate with the pole hole 11 and the positioning hole 21. A limiting step 22 between the pole hole 11 and the positioning hole 21 can limit the installation position of the pole. The limiting step 22 can limit the depth of the pole installed into the shell, which can improve the accuracy of the pole installation; and the limiting step 22 can also provide additional mechanical support for the pole when the battery is subjected to external force impact or vibration, thereby reducing the risk of poor contact or breakage caused by vibration.

[0038] For example, two pole holes 11 are provided on the cover body 1, and the two pole holes 11 are spaced apart along the length direction of the cover body 1. Two positioning rings 2 are provided, and the two positioning rings 2 respectively surround the outer circumference of the corresponding pole holes 11. One pole hole 11 is used to install the positive pole, and the other pole hole 11 is used to install the negative pole.

[0039] According to the battery cover 10 of the embodiment of the utility model, the battery cover 10 includes a cover body 1 and a positioning ring 2 connected to one side of the cover body 1, and a portion of the positioning ring 2 extends to the pole hole 11 along the radial direction of the pole hole 11 to construct a limiting step 22 with the pole hole 11, and the pole is penetrated through the pole hole 11 and cooperates with the limiting step 22 to limit the installation position of the pole to improve the accuracy of the pole installation position.

[0040] According to some embodiments of the present invention, referring to Figure 1-Figure 9 In the axial direction of the pole hole 11, the thickness of the cover body 1 is equal to the thickness of the positioning ring 2, which evenly distributes the external force on the battery cover 10 to a certain extent, enhances the overall rigidity and stability of the battery cover 10, and can more effectively disperse the stress and prevent local deformation of the battery cover 10, especially when the pole is subjected to pressure or torsional force.

[0041] According to some embodiments of the present invention, referring to Figure 1-Figure 9 The cover body 1 and the positioning ring 2 are integrally formed, which can save the process of installing the positioning ring 2 on the cover body 1, simplify the production process and improve production efficiency; and there is no seam or welding point between the cover body 1 and the positioning ring 2, which can increase the overall structural strength of the battery cover 10.

[0042] According to some embodiments of the present invention, referring to Figure 1-Figure 9 The positioning ring 2 defines a positioning hole 21 in communication with the pole hole 11. The cross-sectional area of ​​the positioning hole 21 is greater than 1 / 2 of the cross-sectional area of ​​the pole hole 11, which defines the size of the positioning hole 21. The positioning hole 21 with a larger cross-sectional area can provide the pole with sufficient installation space and reduce assembly resistance. For example, the cross-sectional area of ​​the positioning hole 21 can be 2 / 3, 4 / 5 or 5 / 6 of the cross-sectional area of ​​the pole hole 11.

[0043] According to some embodiments of the present invention, referring to Figure 4-Figure 6 The positioning ring 2 is located on the side of the cover body 1 facing the pole group, and the limiting step 22 is located on the side of the cover body 1 close to the pole group. The pole can be installed on the limiting step 22. The limiting step 22 can support and limit the installation of the pole, which can improve the stability of the installed pole.

[0044] Reference Figure 1-Figure 3 Alternatively, the positioning ring 2 is located on the side of the cover body 1 away from the pole group, and the limiting step 22 is located on the side of the cover body 1 away from the pole group. The limiting step 22 can limit the installation of the pole and improve the accuracy of the pole installation position.

[0045] According to some embodiments of the present invention, referring to Figure 1-Figure 9, the pole hole 11 is a circular hole, and the positioning ring 2 is a circular ring surrounding the pole hole 11; or, the pole hole 11 is a square hole, and the positioning ring 2 is a square ring surrounding the pole hole 11. The circular hole and the square hole are both for matching poles of different shapes, so that the pole can be installed in the pole hole 11. The circular ring and the square ring are both for matching pole holes 11 of different shapes, so that the positioning ring 2 can better surround the outer peripheral side of the pole hole 11.

[0046] For example, the pole hole 11 may be an elliptical hole, and the positioning ring 2 may be an elliptical ring surrounding the pole hole 11. For another example, the pole hole 11 may be a rectangular hole or a square hole, and correspondingly, the positioning ring 2 may be a rectangular ring or a square ring surrounding the pole hole 11.

[0047] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The positioning ring 2 is a square ring surrounding the pole hole 11, and the corners of the square ring are arc-shaped, which avoids stress concentration at the corners of the square ring and prevents the corners of the square ring from scratching the assembly workers.

[0048] According to some embodiments of the present invention, referring to Figure 1-Figure 9 The cover body 1 is also provided with an explosion-proof hole 12, which is an elliptical hole. The long axis of the explosion-proof hole 12 extends along the width direction of the cover body 1, or the short axis of the explosion-proof hole 12 extends along the width direction of the cover body 1. According to the structure of the battery cover 10, the arrangement direction of the explosion-proof hole 12 on the cover body 1 can be adjusted.

[0049] When the battery is out of control, the high-temperature gas in the battery can be discharged through the explosion-proof hole 12. Compared with the circular or other shaped explosion-proof holes 12, the elliptical hole 12 can ensure sufficient pressure relief area.

[0050] According to some embodiments of the present invention, referring to Figure 1-Figure 9 A groove 13 is punched on the cover body 1. The opening of the groove 13 is away from the side of the electrode group. The bottom surface of the groove 13 is provided with an injection hole 131. The injection hole 131 penetrates the bottom surface of the groove 13, so that the electrolyte can be injected into the shell through the injection hole 131. After the battery cover 10 is installed on the shell, the electrolyte is injected into the shell through the opening of the groove 13 and the injection hole 131. When the electrolyte is injected, the groove 13 can play a buffering role for the injection of the electrolyte. Stamping the groove 13 on the cover body 1 and setting the injection hole 131 in the groove 13 can make the method of setting the injection hole 131 simple, and the cross-sectional area of ​​the opening of the groove 13 is larger than the cross-sectional area of ​​the injection hole 131, which can facilitate the injection of the electrolyte.

[0051] The battery according to the embodiment of the second aspect of the utility model includes: the battery cover 10 according to the embodiment of the first aspect of the utility model.

[0052] According to the battery of the embodiment of the utility model, the battery cover 10 is provided to limit the installation position of the pole so as to improve the accuracy of the installation position of the pole; and the shapes of the pole hole 11 and the positioning ring 2 are limited, so that the positions of the pole hole 11 and the positioning ring 2 on the battery cover 10 can be reasonably arranged.

[0053] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] 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 battery cover, characterized in that: include: A cover plate body, wherein the cover plate body has a pole hole; A positioning ring is arranged on one side of the cover plate body, surrounds the outer circumference of the pole hole, and partially extends to the pole hole along the radial direction of the pole hole to form a limiting step with the pole hole.

2. The battery cover according to claim 1, characterized in that: In the axial direction of the pole hole, the thickness of the cover plate body is equal to the thickness of the positioning ring.

3. The battery cover according to claim 1, characterized in that: The cover plate body and the positioning ring are integrally formed.

4. The battery cover according to claim 1, characterized in that: A positioning hole connected to the pole hole is defined in the positioning ring, and a cross-sectional area of ​​the positioning hole is greater than 1 / 2 of a cross-sectional area of ​​the pole hole.

5. The battery cover according to claim 1, characterized in that: The positioning ring is located on a side of the cover plate body facing the pole group, or the positioning ring is located on a side of the cover plate body facing away from the pole group.

6. The battery cover according to claim 1, characterized in that: The pole hole is a circular hole, and the positioning ring is a circular ring surrounding the pole hole; or, the pole hole is a square hole, and the positioning ring is a square ring surrounding the pole hole.

7. The battery cover according to claim 6, characterized in that: The positioning ring is a square ring surrounding the pole hole, and the corners of the square ring are arc transitions.

8. The battery cover according to claim 1, characterized in that: The cover body is further provided with an explosion-proof hole, which is an elliptical hole, and the major axis of the explosion-proof hole extends along the width direction of the cover body, or the minor axis of the explosion-proof hole extends along the width direction of the cover body.

9. The battery cover according to claim 1, characterized in that: A groove is punched on the cover plate body, the opening of the groove is on a side away from the electrode group, and a liquid injection hole is arranged on the bottom surface of the groove.

10. A battery, characterized in that: include: A battery cover according to any one of claims 1 to 9.

Images