Battery and cover plate arrangement for it

Abstract

Cover plate arrangement of a battery, characterized in that it comprises: a cover plate body which has a mounting hole; a bearing section provided around the edge of the mounting hole, wherein the bearing section is formed with a through hole, and the bearing section also has a projecting section on one side of the surface in the thickness direction of the cover plate body; a limiting section connected to the edge of the mounting hole, wherein at least a part of the limiting section lies on the side of the body that is away from the projection section in the thickness direction of the cover plate body, and is provided in such a way that it is spaced apart from the bearing section; a connecting pole, at least part of which is located between the bearing section and the boundary section; a sealing element provided around the connection pole, wherein at least a part of the sealing element is located between the bearing section and the connection pole, at least a part of the sealing element is arranged in the through-hole, the sealing element is pressed against the bearing section, and the projection of the sealing element on the cover plate body and the projection of the projection section on the cover plate body overlap at least partially.

Description

TECHNICAL AREA

[0001] The present utility model relates to the technical field of batteries for new energies, in particular to a battery and a cover plate arrangement therefor. BACKGROUND

[0002] The battery cover plate typically has a terminal post to establish an electrical connection between the outside and the cell inside the battery. The terminal post passes through a terminal hole in the cover plate, and a sealing ring is located between the cover plate and the terminal post to insulate the inside and outside of the battery. To ensure the sealing ring's effectiveness, it rests against the cover plate next to the terminal hole. This can easily lead to deformation of this part of the cover plate, resulting in a poor seal. SUMMARY OF THE USAGE SAMPLE

[0003] The purpose of the present utility model is to provide a battery and a cover plate arrangement for it that can ensure the strength of the cover plate and improve the sealing effect.

[0004] To achieve the above task, the present utility model provides a cover plate arrangement for a battery which includes: a cover plate body which has a mounting hole; a bearing section provided around the edge of the mounting hole, wherein the bearing section is formed with a through hole, and the bearing section also has a projecting section on one side of the surface in the thickness direction of the cover plate body; a limiting section connected to the edge of the mounting hole, wherein at least a part of the limiting section lies on the side of the body that is away from the projection section in the thickness direction of the cover plate body, and is provided in such a way that it is spaced apart from the bearing section; a connecting pole, at least part of which is located between the bearing section and the boundary section; a sealing element provided around the connection pole, wherein at least a part of the sealing element is located between the bearing section and the connection pole, at least a part of the sealing element is arranged in the through-hole, the sealing element is pressed against the bearing section, and the projection of the sealing element on the cover plate body and the projection of the projection section on the cover plate body overlap at least partially.

[0005] The present utility model also provides a battery which features: a housing with an opening that connects to the inside of the housing; a cell provided inside the housing; a cover plate arrangement as described above, which covers the opening.

[0006] The present utility model provides a battery and a cover plate arrangement therefor which has the following advantageous effects compared to the prior art: The cover plate arrangement of the battery of the present utility model comprises a cover plate body, a bearing section, a limiting section, a terminal post, and a sealing element, wherein a projecting section is provided on the bearing section, and the projection of the sealing element on the cover plate body and the projection of the projecting section on the cover plate body overlap at least partially, that is, the projecting section is provided at the position of the bearing section corresponding to the sealing element. This improves the strength of the bearing section at the position of the projecting section, thereby preventing the bearing section from deforming due to the pressure of the sealing element, thus ensuring the strength of the cover plate and improving the sealing effect.

[0007] The battery of the present utility model comprises the cover plate arrangement described above, which can improve the strength of the bearing section at the position of the projection section, thereby preventing the bearing section from being deformed due to the pressure of the sealing element, thus ensuring the strength of the cover plate and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a schematic diagram of the structure of the cover plate arrangement according to an embodiment of the present utility model. Fig. Figure 2 is an enlarged schematic diagram of B in Fig. 1. Fig. Figure 3 is a schematic partial diagram of the structure of the cover plate arrangement according to an embodiment of the present utility model. Fig. Figure 4 is an enlarged schematic diagram of C in Fig. 3. Fig. 5 is a cross-sectional view of AA in Fig. 1. Fig. Figure 6 is an enlarged schematic diagram of D in Fig. 5. Fig. Figure 7 is a schematic diagram of the structure of the sealing element according to an embodiment of the present utility model.

[0008] In the characters: 1. Cover plate body; 2. Bearing section; 3. Limiting section; 4. Connection pole; 5. Sealing element; 11. Mounting hole; 12. Groove; 21. Through hole; 22. Projection section; 31. Connecting section; 32. Flange section. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0009] The specific implementation of this utility model is described in more detail below, in conjunction with the drawings and examples. The following examples serve to illustrate this utility model but are not intended to limit its scope of protection.

[0010] In the description of this utility model, it should be noted that the terms "middle," "longitudinal," "lateral," "top," "bottom," "front," "rear," "left," "right," "vertical," "horizontal," "upper," "lower," "inner," "outer," and the like indicate the orientation or positional relationship based on the orientation or positional relationship in the drawings and serve only to provide a useful description of this utility model and to simplify the description. They do not indicate or suggest that the device or element in question must have a specific orientation or be designed and operated in a specific orientation and should therefore not be interpreted as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and cannot be understood as indicating or suggesting a relative meaning.

[0011] It should be noted that in the description of this utility model, the terms "installation," "mutual connection," and "connection" are to be understood in a broad sense, unless expressly stated otherwise and limited. For example, it may refer to a permanent connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection, or it may refer to an indirect connection via an intermediate element, or it may refer to the internal connection between two components. Those skilled in the art will understand the specific meanings of the foregoing terms in this utility model according to specific situations.

[0012] Furthermore, unless otherwise stated, in the description of this utility model, “several” means two or more.

[0013] Experts will understand the specific meanings of the above terms in the present utility model according to specific situations.

[0014] With regard to the Fig. 1-2, as shown, comprises a battery cover plate arrangement according to an embodiment of the present utility model: a cover plate body 1, a bearing section 2, a limiting section 3, a terminal pole 4 and a sealing element 5.

[0015] The cover plate body 1 has a mounting hole 11.

[0016] The cover plate is a component used to cover the opening of the battery housing, and the cover plate and the battery housing together form a space for the placement of the battery cell.

[0017] The mounting hole 11 serves to provide a mounting space for the connection pole 4.

[0018] With regard to the Fig. 3 and Fig. 4 the bearing section 2 is provided around the edge of the mounting hole 11, wherein the bearing section 2 is formed with a through hole 21, and the bearing section 2 also has a projecting section 22 on a side surface of the bearing section 2 in the thickness direction of the cover plate body 1.

[0019] The bearing section 2 can play a role in supporting the terminal 4, and the through-hole 21 formed by the bearing section 2 can be used to connect the terminal 4 to the cell inside the battery housing. The arrangement of the protruding section 22 can improve the strength of the bearing section 2, i.e., increase the strength near the mounting hole 11.

[0020] In the present embodiment, the thickness direction of the cover plate body 1 is the height direction of the battery.

[0021] The limiting section 3 is connected to the edge of the mounting hole 11 and at least a part of the limiting section 3 lies on the side of the body that is away from the projecting section 22 in the thickness direction of the cover plate body 1 and is provided such that it is spaced apart from the bearing section 2.

[0022] The limiting section 3 limits the connection pole 4.

[0023] At least part of the connection pole 4 is arranged between the bearing section 2 and the limiting section 3.

[0024] Terminal 4 is used for an electrical connection between the battery and external devices. Terminal 4 is divided into a positive terminal 4 and a negative terminal 4 with opposite polarities. Each battery may have multiple positive or negative terminals 4. In the present embodiment, each battery is equipped with one positive terminal 4 and one negative terminal 4. During specific production implementation, the number and position of terminal 4 can be customized as needed.

[0025] The limiting section 3 and the bearing section 2 are used together to clamp the connecting pole 4.

[0026] With regard to the Fig.In sections 5 to 7, the sealing element 5 is positioned around the terminal pole 4 and is at least partially located between the bearing section 2 and the terminal pole 4. At least a portion of the sealing element 5 is located within the through-hole 21. The sealing element 5 presses against the bearing section 2. The projection of the sealing element 5 on the cover plate body 1 and the projection of the projection section 22 on the cover plate body 1 overlap at least partially.

[0027] The arrangement of the sealing element 5 can seal the terminal 4 in such a way that the gap between the inside and outside of the battery is closed by the sealing element 5.

[0028] To ensure a seal, the terminal 4 and the bearing section 2 will jointly press against the sealing element 5. Similarly, the sealing element 5 also exerts pressure on the terminal 4 and the bearing section 2.

[0029] The projection of the sealing element 5 on the cover plate body 1 and the projection of the projection section 22 on the cover plate body 1 overlap at least partially, i.e., the projection section 22 is positioned at the bearing section 2 corresponding to the sealing element 5. This improves the strength of the bearing section 2 at the position of the projection section 22, preventing deformation of the bearing section 2 due to the pressure of the sealing element 5, thus ensuring the strength of the cover plate and improving the sealing effect.

[0030] In some embodiments, the limiting section 3 comprises a connecting section 31 and a flange section 32, the flange section 32 being connected to the edge of the mounting hole 11 by the connecting section 31, and the flange section 32 extending to the terminal pole 4 in a direction parallel to the surface of the cover plate body 1.

[0031] The dimension of the projecting section 22 in the thickness direction of the cover plate body 1 is “c” mm, and the dimension of the flange section 32 in the thickness direction of the cover plate body 1 is “b” mm, where: 0.2 ≤ c / b ≤ 0.7. Preferably, c / b can be 0.3, 0.45, 0.57, 0.62, etc.

[0032] When the above-mentioned area is reached, the strength of bearing section 2 can be ensured, deformation due to the pressure of the sealing element 5 can be prevented, and the sealing performance can be improved. Furthermore, the overall weight of the cover plate assembly and the space occupied by the projecting section 22 are not excessively increased, thus ensuring the energy density of the battery.If the ratio is too small, the effect of the protruding section 22 on the strength increase of the bearing section 2 is small, and the bearing section 2 is still prone to deformation, leading to seal failure; if the ratio is too large, the overall weight of the cover plate assembly is increased, and the ratio of the portion 22 to the interior of the housing after installation will increase, causing the protruding section 22 to take up too much space and, in turn, causing insufficient energy density of the battery.

[0033] When measuring dimensions “c” and “b”, a general length measuring device can be used, e.g. a ruler, a tape measure and other measuring tools.

[0034] When measuring “c”, an end face of the projecting section 22 in the thickness direction of the cover plate body 1 is used as a reference plane, and the distance between the surface of the bearing section 2 and the reference plane is measured along the thickness direction of the cover plate body 1 using the length measuring tool. Five times this measurement is taken, and the mean value is calculated to obtain the dimension “c” mm of the projecting section 22 in the thickness direction of the cover plate body 1.

[0035] When measuring “b”, an end face of the flange section 32 in the thickness direction of the cover plate body 1 is used as a reference plane, and the distance between the other end face of the flange section 32 and the reference plane along the thickness direction of the cover plate body 1 is measured with a length measuring tool. Five times this measurement is taken, and the mean value is calculated to obtain the dimension “b” mm of the flange section 32 in the thickness direction of the cover plate body 1.

[0036] In the present embodiment, the following conditions are also met: 0.2 ≤ c ≤ 1, 0.5 ≤ b ≤ 1.2, in order to adapt to various specifications of batteries currently available. Preferably, “c” can also take values ​​such as 0.3, 0.42, 0.52, 0.68, 0.74, 0.9, and “b” can also take values ​​such as 0.58, 0.67, 0.72, 0.94, 1.05, 1.16.

[0037] The dimension of the flange section 32 in the direction parallel to the surface of the cover plate body 1 is “a” mm, which corresponds to: 0.5 ≤ a ≤ 3, 0.2 ≤ c / b ≤ 0.5. Preferably, “a” can be 0.7, 1, 1.2, 1.5, 1.9, 2.2, 2.6, 2.8, etc., and c / b can be 0.25, 0.3, 0.35, 0.4, 0.45, etc.

[0038] Once the above-mentioned range is reached, the balance between the limiting effect of bearing section 2 and limiting section 3 on the terminal pole 4 can be ensured. This is because the limiting effect on the terminal pole 4 will be more effective the longer the length of flange section 32, i.e., the larger the dimension 'a'. During the forming and use process, the flange section 32 exerts a greater pressure on bearing section 2 through the sealing element 5. Therefore, if 'a' is larger, the thickness 'b' must also be greater to provide better reinforcement.

[0039] When measuring the dimension “a”, a general length measuring device can be used, e.g. a ruler, a tape measure and other measuring tools.

[0040] When measuring “a”, the distance between the outer contour and the inner contour of the flange section 32 is measured with a length measuring tool in the direction parallel to the surface of the cover plate body 1. Multiple measurements are taken and the average value is calculated to obtain the dimension “a” mm of the flange section 32 in the direction parallel to the surface of the cover plate body 1.

[0041] In the case where the connecting pole 4 passes through a through-hole 21, the dimension “c” mm of the projecting section 22 in the thickness direction of the cover plate body 1 and the dimension “b” mm of the flange section 32 in the thickness direction of the cover plate body 1 further satisfy: 0.2 ≤ c / b ≤ 0.55. Preferably, c / b can be 0.28, 0.35, 0.46, 0.51, etc.

[0042] If the terminal 4 passes through the through-hole 21, the pressure of the terminal 4 on the bearing section 2 will be less than if it does not pass through the through-hole 21, so that the thickness of the protruding section 22 can be appropriately reduced to reduce the cost and the occupancy of the interior of the battery.

[0043] In the thickness direction of the cover plate body 1, the distance by which the end of the connecting pole 4 protrudes from the surface of the bearing section 2 near the bearing section 2 is “d” mm, where: c < d.

[0044] The size of the projecting section 22 in the thickness direction of the cover plate body 1 is “c” mm, and the size of the flange section 32 in the thickness direction of the cover plate body 1 is “b” mm, further satisfying that: 0.2 ≤ c / b ≤ 0.5. Preferably, c / b can be 0.21, 0.29, 0.34, 0.37, 0.41, 0.47, etc.

[0045] Since the terminal pole 4 protrudes from the surface of the bearing section 2 and the surface of the projection section on the bearing section 2 in the thickness direction of the cover plate body 1, it can, when the alignment described above is achieved, facilitate the subsequent installation of insulating parts and prevent the terminal pole 4 from overlapping with the cover plate body 1, thus also avoiding the risk of short circuit or corrosion.

[0046] If the connecting pole 4 does not pass through the through-hole 21 in the thickness direction of the cover plate body 1, the end of the connecting pole 4 is located near the bearing section 2 on the side of the bearing section 2 facing the limiting section 3. The size of the projecting section 22 in the thickness direction of the cover plate body 1 is 'c' mm, and the size of the flange section 32 in the thickness direction of the cover plate body 1 is 'b' mm, further satisfying that: 0.3 ≤ c / b ≤ 0.7. Preferably, c / b can be 0.32, 0.43, 0.5, 0.57, 0.63, etc.

[0047] In this case, the pressure of the terminal pole 4 on the bearing section 2 will be greater, so it is necessary to ensure the strength-enhancing effect of the projection section 22 on the bearing section 2 in order to prevent the bearing section 2 from deforming and causing a failure of the seal.

[0048] In some embodiments, the limiting section 3 and the cover plate body 1 are in a split structure, and the limiting section 3 is welded to the cover plate body 1.

[0049] The dimension “c” mm of the projecting section 22 in the thickness direction of the cover plate body 1 and the dimension “b” mm of the flange section 32 in the thickness direction of the cover plate body 1 further satisfy: 0.25 ≤ c / b ≤ 0.7. Preferably, c / b can be 0.28, 0.35, 0.4, 0.48, 0.52, 0.63, etc.

[0050] For this split structure, the thickness of the projection section 22 is arranged to be greater, thereby increasing the heat dissipation capacity of the weld between the boundary section 3 and the cover plate body 1 and reducing the influence of the welding heat on the sealing element 5.

[0051] In some embodiments, the limiting section 3 comprises a connecting section 31 and a flange section 32, the flange section 32 being connected to the edge of the mounting hole 11 by the connecting section 31, and the flange section 32 extending to the terminal pole 4 in a direction parallel to the surface of the cover plate body 1.

[0052] In some embodiments, the limiting section 3, the bearing section 2 and the cover plate body 1 are formed in one piece, and a groove 12 is provided on the surface of the cover plate body 1 or the bearing section 2 on one side away from the limiting section 3.

[0053] In the case of boundary section 3, where bearing section 2 and cover plate body 1 are formed in one piece, boundary section 3 and bearing section 2 are extruded from the material originally belonging to cover plate body 1. Since the material is limited, a portion of it is distributed evenly across cover plate body 1. If bearing section 2 is extruded first and then boundary section 3, a portion of the material may be distributed evenly across bearing section 2, or a portion of the material may be distributed evenly across both bearing section 2 and cover plate body 1 simultaneously.

[0054] In other words, the groove 12 is arranged on the cover plate body 1 and is positioned so that it is spaced apart from the projecting section 22. This creates a gap between the groove 12 and the projecting section 22, which can reduce the impact on the strength of the bearing section 2 near the sealing element 5. Alternatively, the groove 12 can be located on the projecting section or at the position of the non-projecting section of the bearing section 2.

[0055] The present embodiment also provides a battery comprising a housing, a cell, and the cover plate arrangement as described above. The housing has an opening connected to the inside of the housing, the cell is provided inside the housing, and the cover plate arrangement covers the opening. With such a structure, the strength of the bearing section 2 at the position of the projecting section 22 can be improved, thereby preventing the bearing section 2 from deforming due to the pressure of the sealing element 5, thus ensuring the strength of the cover plate and improving the sealing effect.

[0056] The above is only one preferred embodiment of the present utility model. It should be noted that, for those skilled in the field, several improvements and substitutions can be made without departing from the technical principle of the present utility model, and these improvements and substitutions should also be considered within the scope of protection of the present utility model.

Claims

[1] Cover plate arrangement of a battery, characterized by that it includes: a cover plate body which has a mounting hole; a bearing section provided around the edge of the mounting hole, wherein the bearing section is formed with a through hole, and the bearing section also has a projecting section on one side of the surface in the thickness direction of the cover plate body; a limiting section connected to the edge of the mounting hole, wherein at least a part of the limiting section lies on the side of the body that is away from the projection section in the thickness direction of the cover plate body, and is provided in such a way that it is spaced apart from the bearing section; a connecting pole, at least part of which is located between the bearing section and the boundary section; a sealing element provided around the connection pole, wherein at least a part of the sealing element is located between the bearing section and the connection pole, at least a part of the sealing element is arranged in the through-hole, the sealing element is pressed against the bearing section, and the projection of the sealing element on the cover plate body and the projection of the projection section on the cover plate body overlap at least partially. [2] Cover plate arrangement of a battery according to claim 1, characterized by , that the limiting section comprises a connecting section and a flange section, the flange section is connected to the edge of the mounting hole by the connecting section, and the flange section extends to the connection pole in a direction parallel to the surface of the cover plate body; the dimension of the projection section in the thickness direction of the cover plate body “c” is mm, and the dimension of the flange section in the thickness direction of the cover plate body “b” is mm, where: 0.2 ≤ c / b ≤ 0.

7. [3] Cover plate arrangement of a battery according to claim 2, characterized by , that the dimension of the flange section in the direction parallel to the surface of the cover plate body is “a” mm, where: 0.5 ≤ a ≤ 3, 0.2 ≤ c / b ≤ 0.

5. [4] Cover plate arrangement of a battery according to claim 2 or 3, characterized by , that the connecting pole passes through the through hole; the dimension of the projection section in the thickness direction of the cover plate body “c” is mm, and the dimension of the flange section in the thickness direction of the cover plate body “b” is mm, furthermore satisfying: 0.2 ≤ c / b ≤ 0.

55. [5] Cover plate arrangement of a battery according to any one of claims 2 to 4, characterized by , that in the thickness direction of the cover plate body, one end of the connecting pole is located near the bearing section on the side of the bearing section facing the limiting section; the dimension of the projection section in the thickness direction of the cover plate body is “c” mm, and the dimension of the flange section in the thickness direction of the cover plate body is “b” mm, furthermore satisfying: 0.3 ≤ c / b ≤ 0.

7. [6] Cover plate arrangement of a battery according to any one of claims 2 to 5, characterized by , that the boundary section and the cover plate body are in a split structure, and the boundary section is welded to the cover plate body; the dimension of the projection section in the thickness direction of the cover plate body “c” is mm, and the dimension of the flange section in the thickness direction of the cover plate body “b” is mm, furthermore satisfying: 0.25 ≤ c / b ≤ 0.

7. [7] Cover plate arrangement of a battery according to any one of claims 2 to 6, characterized by , that the limiting section, the bearing section and the cover plate body are formed in one piece, and a groove is provided on the surface of the cover plate body or the bearing section on one side away from the limiting section. [8] Cover plate arrangement of a battery according to any one of claims 4 to 7, characterized by , that in the thickness direction of the cover plate body, the distance by which an end of the connecting pole protrudes from the surface of the bearing section near the bearing section is “d” mm, which satisfies: c < d; the dimension of the projection section in the thickness direction of the cover plate body is “c” mm, and the dimension of the flange section in the thickness direction of the cover plate body is “b” mm, further satisfying: 0.2 ≤ c / b ≤ 0.

5. [9] Cover plate arrangement of a battery according to claim 7 or 8, characterized by , that the groove is provided in such a way that it is spaced away from the projecting section. [10] Cover plate arrangement of a battery according to any one of claims 2 to 9, characterized by , that the dimension “c” mm of the projection section in the thickness direction of the cover plate body further satisfies: 0.2 ≤ c ≤ 1. [11] Cover plate arrangement of a battery according to any one of claims 2 to 10, characterized by , that the dimension “b” mm of the flange section in the thickness direction of the cover plate body further satisfies: 0.5 ≤ b ≤ 1.

2. [12] Battery, characterized by that it includes the following: a housing with an opening that connects to the inside of the housing; a cell provided inside the housing; a cover plate arrangement according to any one of claims 1 to 11, which covers the opening.

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