Cover plate assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a cover plate assembly and a battery, the cover plate assembly comprises a cover plate body, upper plastic, an aluminum block and a limiting piece, and two pole columns are arranged on the cover plate body; the upper plastic is connected with the poles in a one-to-one correspondence manner, and one side, deviating from the cover plate body, of the upper plastic is provided with an accommodating groove; the aluminum blocks are connected with the upper plastic cement in a one-to-one correspondence manner, the pole columns penetrate through the upper plastic cement and the aluminum blocks, the aluminum blocks are arranged in the accommodating grooves, and the shapes of the accommodating grooves are matched with those of the aluminum blocks; the upper plastic is provided with at least one limiting piece, and the limiting piece is connected with one of the upper plastic and the aluminum block and can abut against the other one of the upper plastic and the aluminum block so as to limit the relative position of the aluminum block and the upper plastic. Thus, the containing groove can limit the position of the aluminum block, the aluminum block can be conveniently assembled with the upper plastic, the limiting piece can further limit the relative position of the aluminum block and the upper plastic, and the situation that the aluminum block deviates in the assembling, riveting and welding processes, and the assembling effect is affected is avoided.

Description

Technical Field

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

[0002] A battery is a device that can convert chemical energy into electrical energy. It is widely used in various electronic products, vehicles and other occasions that require power supply.

[0003] The battery includes a cover, a shell and a battery cell. The battery cell is arranged inside the shell. The cover and the shell are connected by welding. The cover is provided with a pole electrically connected to the battery cell. The aluminum block is electrically connected to the pole to conduct the current generated inside the battery to the external circuit. In order to avoid short circuits and other situations, plastic is usually set between the aluminum block and the cover body to make the aluminum block electrically connected to the battery cell through the pole.

[0004] The aluminum block and the upper plastic are placed in contact with each other and then riveted and welded to the pole, so that the aluminum block and the upper plastic can be assembled to the cover. However, during the assembly process, the aluminum block may be skewed or misaligned or not properly contacted with the upper plastic due to improper operation, inaccurate positioning, etc., resulting in unqualified dimensional position and affecting the assembly effect of the aluminum block and the upper plastic. Moreover, after the aluminum block is riveted to the pole, the edge of the aluminum block may warp because the aluminum block material is soft and easily deformed, which deteriorates the fit between the aluminum block and the upper plastic, thereby affecting the welding effect with the pole. Utility Model Content

[0005] The purpose of the utility model is to provide a cover plate assembly and a battery to solve the problem of poor assembly effect between the aluminum block and the upper plastic.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] On the one hand, a cover assembly includes: a cover body, on which two poles are provided; an upper plastic, which is connected to the poles in a one-to-one manner, and a receiving groove is provided on the side of the upper plastic facing away from the cover body; an aluminum block, which is connected to the upper plastic in a one-to-one manner, and the poles are provided through the upper plastic and the aluminum block, and the aluminum block is provided in the receiving groove, and the shape of the receiving groove is adapted to the aluminum block; a limiter, which is connected to one of the upper plastic and the aluminum block and can abut against the other to limit the relative position of the aluminum block and the upper plastic.

[0008] Preferably, the depth of the accommodating groove is less than the thickness of the aluminum block.

[0009] Preferably, one of the upper plastic connections has two of the limiting members, which are respectively provided at both ends of the aluminum block and connected to the aluminum block for limiting the positions of the two ends of the aluminum block.

[0010] Preferably, the limiting member is a limiting buckle, which is fixedly connected to the upper plastic and buckled with the aluminum block to limit the relative position of the aluminum block and the upper plastic.

[0011] Preferably, the limiting buckle includes a first part and a second part, the two ends of the second part are respectively fixedly connected to the first part and the upper plastic, the first part and the second part are arranged at an angle, and the end of the first part away from the second part is arranged toward the accommodating groove.

[0012] Preferably, a limiting groove is provided on the aluminum block at a position corresponding to the first portion, so that the first portion is inserted into the limiting groove and limits the movement of the aluminum block in a direction away from the upper plastic.

[0013] Preferably, the side surface of the first portion facing away from the second portion extends smoothly in a direction toward the bottom surface of the accommodating groove.

[0014] Preferably, the cover assembly further includes pins, which are arranged in a one-to-one correspondence with the poles. The pins are arranged on a side of the cover body away from the upper plastic, and the pins are electrically connected to the corresponding poles.

[0015] Preferably, the pole passes through the aluminum block, the upper plastic, the cover body, and the pin in sequence and is fixedly connected to the aluminum block, the upper plastic, the cover body, and the pin.

[0016] A battery comprises a shell, a battery cell and the cover assembly as described above, wherein the battery cell is arranged inside the shell, the cover body is connected to the shell, and the upper plastic and the aluminum block are both arranged on the side of the cover body facing away from the shell.

[0017] Beneficial effects of the utility model:

[0018] The cover assembly includes a cover body, an upper plastic, an aluminum block and a limiter. Two poles are provided on the cover body. The upper plastic is connected to the poles in a one-to-one correspondence, and a receiving groove is provided on the side of the upper plastic facing away from the cover body. The aluminum block is connected to the upper plastic in a one-to-one correspondence. The poles pass through the upper plastic and the aluminum block. The aluminum block is set in the receiving groove, and the shape of the receiving groove is adapted to the aluminum block. One upper plastic is provided with at least one limiter, which is connected to one of the upper plastic and the aluminum block and can abut against the other to limit the relative position of the aluminum block and the upper plastic.

[0019] In this way, the receiving groove can initially limit the position of the aluminum block on the upper plastic. The limiter is connected to the aluminum block, which can further limit the relative position of the aluminum block and the upper plastic, making it less likely for the aluminum block to tilt or even fall off from the receiving groove, thereby improving the assembly effect of the aluminum block and the upper plastic, and enabling the aluminum block and the upper plastic to maintain good contact, thereby avoiding deformation of the aluminum block during riveting and welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of a cover plate assembly in one embodiment of the present invention;

[0021] Figure 2 This is a partial structural diagram of a cover plate assembly in one embodiment of the present utility model;

[0022] Figure 3 This is a schematic structural diagram of the upper plastic in one embodiment of the present utility model;

[0023] Figure 4 It is a partial cross-sectional view of a cover plate assembly in one embodiment of the present utility model.

[0024] In the picture:

[0025] 1. Cover plate body; 11. Pole; 12. Liquid injection hole; 13. Explosion-proof disk; 2. Upper plastic; 21. Accommodation groove; 3. Aluminum block; 31. Limiting groove; 4. Limiting member; 41. First part; 42. Second part; 5. Pin; 51. Insulation member. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0027] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0030] See Figure 1 The present invention provides a cover assembly, comprising a cover body 1, an upper plastic 2, an aluminum block 3, and a stopper 4. The cover body 1 is provided with two poles 11; the upper plastic 2 is connected to the poles 11 in a one-to-one correspondence, and a receiving groove 21 is formed on the side of the upper plastic 2 facing away from the cover body 1; the aluminum block 3 is connected to the upper plastic 2 in a one-to-one correspondence, that is, one pole 11 is connected to one upper plastic 2 and one aluminum block 3, and the pole 11 is provided through the upper plastic 2 and the aluminum block 3, and the aluminum block 3 is provided in the receiving groove 21, the shape of which is adapted to the aluminum block 3; the stopper 4 is connected to one of the upper plastic 2 and the aluminum block 3, and can abut against the other to limit the relative position of the aluminum block 3 and the upper plastic 2. In this embodiment, the cover body 1 is a rectangular plate structure made of aluminum material, a liquid injection hole 12 is opened on the cover body 1, and the cover body 1 is connected to a burst-proof plate 13, two poles 11 are respectively arranged at both ends of the cover body 1, and the liquid injection hole 12 and the burst-proof plate 13 are arranged between the two poles 11; the upper plastic 2 is a square plate structure made of insulating material, the cross-sectional area of ​​the aluminum block 3 is equal to the cross-sectional area of ​​the accommodating groove 21, so that when the aluminum block 3 is placed in the accommodating groove 21, the side wall of the aluminum block 3 abuts the inner wall of the accommodating groove 21, and the limiter 4 is fixedly connected to the upper plastic 2, and one upper plastic 2 is provided with at least one limiter 4, which is arranged on the side of the upper plastic 2 away from the cover body 1, and the limiter 4 abuts the edge of the aluminum block 3, and the length direction of the aluminum block 3 and the length direction of the upper plastic 2 are both parallel to the length direction of the cover body 1.

[0031] In this way, placing the aluminum block 3 in the accommodating groove 21 can preliminarily limit the position of the aluminum block 3, making it easier to assemble the aluminum block 3 to the upper plastic 2. The limiting member 4 can further limit the relative position of the aluminum block 3 and the upper plastic 2, making it less likely to tilt or deviate during assembly, riveting and welding, and keeping the aluminum block 3 in good contact with the upper plastic 2, thereby improving the connection stability and assembly effect with the upper plastic 2. The limiting member 4 can limit the edge of the aluminum block 3 to prevent it from deforming during the riveting process.

[0032] It is understandable that the shapes of the upper plastic 2 and the aluminum block 3 can be adjusted according to the actual design requirements of the battery, as long as the aluminum block 3 and the upper plastic 2 are kept stably connected. No further examples are given here.

[0033] See Figure 1 and Figure 2 In some embodiments, the depth of the accommodating groove 21 is less than the thickness of the aluminum block 3. That is, the side of the aluminum block 3 facing away from the cover body 1 is higher than the side of the upper plastic 2 facing away from the cover body 1. In this embodiment, the side of the pole 11 facing away from the cover body 1 is flush with the side of the aluminum block 3 facing away from the cover body 1.

[0034] In this way, when the aluminum block 3 is assembled into the accommodating groove 21, the side of the aluminum block 3 facing away from the cover body 1 is set higher than the upper plastic 2, which can facilitate the connection of the aluminum block 3 with the external circuit, and the upper plastic 2 can effectively insulate the bottom and side of the aluminum block 3 to avoid short circuit caused by connection with the cover body 1. While the limiter 4 limits the aluminum block 3, the aluminum block 3 and the upper plastic 2 can be stably connected to the cover body 1, and the aluminum block 3 is only electrically connected to the pole 11, thereby improving the assembly effect of the aluminum block 3 and the upper plastic 2 and the safety performance of the cover assembly.

[0035] It can be understood that the depth of the accommodating groove 21 can also be equal to the thickness of the aluminum block 3. In this embodiment, the depth of the accommodating groove 21 is less than the thickness of the aluminum block 3 in order to facilitate the top surface of the aluminum block 3 (that is, the side facing away from the cover body 1) and the side wall to be well connected to the external circuit.

[0036] See Figure 2 In some embodiments, one upper plastic 2 is connected to two limiters 4, which are respectively disposed at both ends of the aluminum block 3 and connected to the aluminum block 3 to limit the positions of the two ends of the aluminum block 3. When the aluminum block 3 is located in the receiving groove 21, both limiters 4 abut against the aluminum block 3.

[0037] In this way, the two limit members 4 respectively limit the positions of the two ends of the aluminum block 3, which can prevent the two ends of the aluminum block 3 from being easily tilted and deformed, and further enable the aluminum block 3 to maintain continuous contact with the upper plastic 2, thereby improving the welding effect of the aluminum block 3 and the pole 11, and avoiding the aluminum block 3 from tilting and shifting during the assembly, riveting, and welding process, thereby avoiding the aluminum block 3 from not being in contact with the upper plastic 2, reducing the occurrence of unqualified dimensional position, and improving the assembly effect of the aluminum block 3 and the upper plastic 2.

[0038] It is understandable that one limiter 4 can also be provided so that the limiter 4 only abuts against one end of the aluminum block 3. The limiter 4 can also be provided on both sides in the width direction of the aluminum block 3. The number and setting position of the limiter 4 can be adjusted according to actual needs, and it is sufficient to prevent the edge of the aluminum block 3 from warping. No further details will be given here.

[0039] See Figure 2 In some embodiments, the limiting member 4 is a limiting buckle made of elastic material, which is fixedly connected to the upper plastic 2 and buckled with the aluminum block 3 to limit the relative position of the aluminum block 3 and the upper plastic 2. The limiting buckle and the upper plastic 2 are integrally formed.

[0040] In this way, after the aluminum block 3 and the upper plastic 2 are assembled, the movement of the aluminum block 3 can be limited by buckling the limiting buckle with the aluminum block 3, so that the aluminum block 3 and the upper plastic 2 are stably connected, avoiding the aluminum block 3 from being offset or skewed due to external forces during subsequent riveting and welding work, thereby improving the assembly effect of the aluminum block 3 and the upper plastic 2; the limiting buckle is made of elastic material, which can keep the limiting buckle and the aluminum block 3 in continuous contact to limit the relative position of the aluminum block 3 and the upper plastic 2.

[0041] It can be understood that the limit buckle can also be detachably connected to the upper plastic 2 through the form of an insert slot. In this embodiment, the limit buckle is fixedly connected to the upper plastic 2 in order to enhance the connection strength between the limit buckle and the upper plastic 2, so as to improve the limiting effect on the aluminum block 3.

[0042] See Figure 2 and Figure 3 In some embodiments, the retaining buckle includes a first portion 41 and a second portion 42. The second portion 42 is fixedly connected to the first portion 41 and the upper plastic 2 at both ends. The first portion 41 and the second portion 42 are arranged at an angle, with the end of the first portion 41 facing away from the second portion 42 facing the receiving groove 21. In this embodiment, the first portion 41 and the second portion 42 are arranged perpendicularly to form a hook-shaped structure. The distance between the two first portions 41 on the same upper plastic 2 is less than the length of the aluminum block 3.

[0043] It should be noted that when the aluminum block 3 moves into the accommodating groove 21, the first part 41 moves in the direction away from each other due to the force of the aluminum block 3. After the aluminum block 3 is completely located in the accommodating groove 21, the first part 41 resets and clamps the aluminum block 3 under the action of its own elastic force, thereby limiting the aluminum block 3.

[0044] In this way, the first part 41 is clamped with the aluminum block 3, which not only makes it easier to assemble the aluminum block 3 into the accommodating groove 21, but also makes it difficult for the aluminum block 3 to fall off from the accommodating groove 21, thereby avoiding unqualified dimensional position due to changes in the relative position of the aluminum block 3 and the upper plastic 2, thereby improving the assembly effect of the aluminum block 3 and the upper plastic 2, and in the subsequent riveting and welding process, the first part 41 can continue to abut against the edge of the aluminum block 3, thereby avoiding deformation of the edge of the aluminum block 3 and improving the welding effect.

[0045] It is understandable that the angle between the first portion 41 and the second portion 42 can also be an acute angle or an obtuse angle, as long as the limit buckle is elastically engaged with the aluminum block 3, and no further examples are given here.

[0046] See Figure 2 In some embodiments, a limiting groove 31 is provided on the aluminum block 3 at a position corresponding to the first portion 41 , so that the first portion 41 is inserted into the limiting groove 31 and limits the movement of the aluminum block 3 in a direction away from the upper plastic 2 .

[0047] In this embodiment, the length direction of the limiting groove 31 is parallel to the moving direction of the aluminum block 3 when assembled to the upper plastic 2, that is, the limiting groove 31 is vertically arranged, and the first part 41 extends into the limiting groove 31 and realizes the clamping connection with the aluminum block 3.

[0048] In this way, compared with the first part 41 being clamped with the top surface of the aluminum block 3, the first part 41 being clamped into the limiting groove 31 can reduce the length required for the second part 42, making the structure of the upper plastic 2 and the limiting buckle more compact, saving the vertical space of the cover body 1, and facilitating the stable combination of the aluminum block 3 and the upper plastic 2, thereby fixing the relative position of the aluminum block 3 and the upper plastic 2, and avoiding the aluminum block 3 from being skewed and offset during the assembly, riveting, and welding process, thereby affecting the assembly effect of the aluminum block 3 and the upper plastic 2.

[0049] See Figure 3 In some embodiments, the side of the first portion 41 facing away from the second portion 42 extends smoothly toward the bottom surface of the receiving groove 21. The portion of the first portion 41 protruding from the second portion 42 is located in the receiving groove 21.

[0050] In this way, the aluminum block 3 is not easily scratched by the first part 41 when it abuts against the side of the first part 41 facing away from the second part 42. At the same time, it is convenient to assemble the aluminum block 3 to the upper plastic 2, so that the first part 41 can be quickly snapped into the aluminum block 3, and the aluminum block 3 can maintain a good connection with the external circuit, thereby improving the assembly effect of the aluminum block 3 and the upper plastic 2.

[0051] It is understandable that the side of the first part 41 facing away from the second part 42 can also be parallel to the side of the first part 41 facing the second part 42, that is, the first part 41 is horizontally arranged, and the shape of the first part 41 can be adjusted according to actual needs, which will not be elaborated here.

[0052] See Figure 1 and Figure 4 In some embodiments, the cover assembly further includes pins 5, which are arranged in a one-to-one correspondence with the poles 11, that is, one pole 11 is connected to a corresponding pin 5, and the pins 5 are arranged on the side of the cover body 1 away from the upper plastic 2, and the pins 5 are electrically connected to the corresponding poles 11.

[0053] In this embodiment, the pin 5 is an L-shaped plate structure made of conductive material, one end of the pin 5 is connected to the pole 11, and the other end is bent downward and arranged below the end of the cover body 1; the pin 5 is connected to the insulating part 51, and the insulating part 51 is arranged between the pin 5 and the cover body 1.

[0054] In this way, the aluminum block 3 and the pin 5 can both lead the current inside the battery and connect it to the external circuit, thereby improving the flexibility of the battery. The insulating member 51 can prevent the pin 5 from directly contacting the cover body 1 and causing a short circuit, thereby improving the safety performance of the pin 5.

[0055] See Figure 4 In some embodiments, the terminal 11 is sequentially arranged through the aluminum block 3, the upper plastic 2, the cover body 1, and the pin 5 and is fixedly connected to the aluminum block 3, the upper plastic 2, the cover body 1, and the pin 5. In this embodiment, the aluminum block 3, the upper plastic 2, the cover body 1, and the pin 5 are riveted together through the terminal 11.

[0056] In this way, the pole 11 can fix the aluminum block 3, the upper plastic 2, and the pin 5 on the cover body 1, avoiding deviation, skewness, deformation, etc., improving the assembly effect of the aluminum block 3 and the upper plastic 2, and enabling the aluminum block 3 to stably transmit current to the external circuit.

[0057] See Figure 1 The present invention also provides a battery comprising a housing (not shown), a battery cell (not shown), and a cover assembly. The battery cell is disposed within the housing, a cover body 1 is connected to the housing, and an upper plastic 2 and an aluminum block 3 are both disposed on the side of the cover body 1 facing away from the housing. In this embodiment, two pins 5 are symmetrically disposed on two poles 11, with the ends of the pins 5 facing away from the poles 11 connected to the outer wall of the housing.

[0058] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A cover plate assembly, characterized in that: include: A cover plate body (1), wherein two poles (11) are provided on the cover plate body (1); An upper plastic (2), the upper plastic (2) being connected to the pole (11) in a one-to-one correspondence, and a receiving groove (21) being provided on a side of the upper plastic (2) facing away from the cover body (1); An aluminum block (3), the aluminum block (3) is connected to the upper plastic (2) in a one-to-one correspondence, the pole (11) passes through the upper plastic (2) and the aluminum block (3), the aluminum block (3) is arranged in the receiving groove (21), and the shape of the receiving groove (21) is adapted to the aluminum block (3); A limiting member (4) is connected to one of the upper plastic (2) and the aluminum block (3) and can abut against the other to limit the relative position of the aluminum block (3) and the upper plastic (2).

2. The cover plate assembly according to claim 1, wherein: The depth of the accommodating groove (21) is less than the thickness of the aluminum block (3).

3. The cover plate assembly according to claim 1, wherein: One of the upper plastics (2) is connected to two of the limiting members (4), and the two limiting members (4) are respectively arranged at both ends of the aluminum block (3) and connected to the aluminum block (3) for limiting the positions of the two ends of the aluminum block (3).

4. The cover plate assembly according to claim 1, wherein: The limiting member (4) is a limiting buckle, which is fixedly connected to the upper plastic (2) and buckled with the aluminum block (3) to limit the relative position of the aluminum block (3) and the upper plastic (2).

5. The cover plate assembly according to claim 4, wherein: The limiting buckle comprises a first part (41) and a second part (42), the two ends of the second part (42) are fixedly connected to the first part (41) and the upper plastic (2), the first part (41) and the second part (42) are arranged at an angle, and the end of the first part (41) away from the second part (42) is arranged toward the receiving groove (21).

6. The cover plate assembly according to claim 5, wherein: The aluminum block (3) is provided with a limiting groove (31) at a position corresponding to the first part (41), so that the first part (41) is inserted into the limiting groove (31) and limits the movement of the aluminum block (3) in a direction away from the upper plastic (2).

7. The cover plate assembly according to claim 5, wherein: The side surface of the first portion (41) facing away from the second portion (42) extends smoothly in a direction toward the bottom surface of the accommodating groove (21).

8. The cover plate assembly according to any one of claims 1 to 7, characterized in that: The cover assembly further comprises pins (5), the pins (5) being arranged in one-to-one correspondence with the poles (11), the pins (5) being arranged on a side of the cover body (1) facing away from the upper plastic (2), and the pins (5) being electrically connected to the corresponding poles (11).

9. The cover plate assembly according to claim 8, wherein: The pole (11) is sequentially arranged through the aluminum block (3), the upper plastic (2), the cover body (1), and the pin (5) and is fixedly connected to the aluminum block (3), the upper plastic (2), the cover body (1), and the pin (5).

10. A battery, characterized in that: It comprises a shell, a battery cell and a cover assembly as described in any one of claims 1 to 9, wherein the battery cell is arranged inside the shell, the cover body (1) is connected to the shell, and the upper plastic (2) and the aluminum block (3) are both arranged on the side of the cover body (1) facing away from the shell.

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