Battery cover structure and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery cover structure and a battery. The battery cover structure comprises a cover plate body, a first plastic part and a connecting piece, and the cover plate body and the first plastic part are in interference insertion along a directional direction. And the tabs of the pole group can sequentially penetrate through the first plastic part and the cover plate body along the direction and are electrically connected with the connecting sheet. The connecting sheet is also used for being electrically connected with an external electric device. And the pole group, the first plastic part, the cover plate body and the connecting sheet are sequentially distributed along the orientation direction. The orientation is parallel to the thickness direction of the cover plate body. The battery cover structure has the advantages of few parts and high assembly efficiency, and can effectively enlarge the internal space of the battery box structure.

Description

Technical Field

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

[0002] With the continuous development of the battery industry, batteries, owing to their high energy density and other advantages, are widely used in vehicles, mobile electrical devices, and other fields. A battery primarily consists of a battery box, a battery cover that covers the battery box, and an electrode assembly housed within the battery box. The battery cover not only forms a protective housing for the electrode assembly with the battery box but also serves as an electrical connection between the electrode assembly and external electrical devices. Therefore, the battery cover is a critical component of a battery.

[0003] The battery cover mainly consists of a cover body, a pole, and a connecting piece. At present, in the prior art, the pole is usually arranged to pass through the cover body along the thickness direction of the cover, and one end of the pole located in the protective shell is electrically connected to the pole ear of the pole group through the connecting piece, and the other end of the pole extends out of the protective shell for electrical connection with the external electrical equipment, so that the pole can electrically connect the pole group with the external electrical equipment. However, the pole extending into the protective shell will occupy the internal space of the protective shell, and the connecting piece distributed in the protective shell will also occupy the internal space of the protective shell. In addition, the above-mentioned arrangement will also result in the need to set a thicker plastic layer on the end face of the cover body close to the pole group, which will also occupy the internal space of the protective shell. Secondly, the cover and the plastic layer are connected by riveting or other methods, which leads to a large number of parts, high production costs, and low assembly efficiency. Utility Model Content

[0004] The purpose of the present utility model is to provide a battery cover structure and a battery to solve the above-mentioned problems existing in the battery cover of the prior art.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The battery cover structure comprises a cover body, a first plastic part and a connecting piece; the cover body and the first plastic part are plugged in along a directional interference fit;

[0007] The tabs of the electrode group can pass through the first plastic part and the cover body in sequence along a certain direction and be electrically connected to the connecting piece, and the connecting piece is also used to be electrically connected to an external electrical device;

[0008] Along the orientation, the electrode group, the first plastic part, the cover body and the connecting piece are distributed in sequence; the orientation is parallel to the thickness direction of the cover body.

[0009] As a preferred solution of the above battery cover structure, one of the cover body and the first plastic part is provided with a plug-in portion, and the other is provided with a socket. The plug-in portion is inserted into the socket along the directional interference fit.

[0010] As a preferred solution of the above-mentioned battery cover structure, the outer peripheral wall of the plug-in portion is provided with an interference rib, and the interference rib is inserted into the insertion hole and has an interference fit with the inner peripheral wall of the insertion hole; and / or,

[0011] The inner peripheral wall of the insertion hole is provided with an interference rib. When the plug-in portion is plugged into the insertion hole along the orientation, the interference rib is interference-fitted with the outer peripheral wall of the plug-in portion.

[0012] As a preferred solution of the above battery cover structure, the interference range of the interference rib is: 0.05mm~0.3mm.

[0013] As a preferred solution of the above-mentioned battery cover structure, the interference rib is provided with a guide surface, and the guide surface is used to guide the insertion of the plug-in portion and the plug-in hole.

[0014] As a preferred solution of the above battery cover structure, the interference rib extends along the direction and is rectangular.

[0015] As a preferred embodiment of the battery cover structure, the battery cover structure further includes a first mounting hole, the first mounting hole penetrating the first plastic part and the cover body along the direction, and the tab can be electrically connected to the connecting piece through the first mounting hole; or

[0016] The battery cover structure further includes a first mounting hole, which passes through the first plastic part, the plug-in portion and the cover body along the direction, and the tab can pass through the first mounting hole to be electrically connected to the connecting piece.

[0017] As a preferred solution of the above battery cover structure, the first plastic part is a plastic plate.

[0018] As a preferred embodiment of the battery cover structure, the battery cover structure further comprises a second plastic part fixedly disposed on the cover body, the first plastic part and the second plastic part being respectively located on both sides of the cover body along the orientation; the connecting piece being fixedly disposed on the second plastic part;

[0019] The tab can sequentially pass through the first plastic part, the cover body, and the second plastic part along the orientation and be electrically connected to the connecting piece.

[0020] The battery comprises a battery shell and an electrode group, and also comprises the above-mentioned battery cover structure, wherein the cover body is fixedly connected to the battery shell to form a battery box structure, and the electrode group is arranged in the battery box structure.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a battery cover structure and a battery. The battery cover structure includes a cover body, a first plastic part, and a connecting piece. The cover body and the first plastic part are interlocked in a directional manner. The electrode tabs of the electrode assembly can sequentially pass through the first plastic part and the cover body along the directional direction and be electrically connected to the connecting piece. The connecting piece is also used for electrical connection to external electrical components. The electrode assembly, the first plastic part, the cover body, and the connecting piece are sequentially arranged along the directional direction. The directional direction is parallel to the thickness direction of the cover body.

[0023] The battery cover structure connects the cover body and the first plastic part in a directional interference fit, which effectively reduces the number of parts and improves the assembly efficiency of the cover body and the first plastic part compared to the prior art.

[0024] Secondly, by arranging the electrode group, the first plastic part, the cover body, and the connecting piece to be distributed in sequence along the orientation, it can be understood that the connecting piece is located outside the battery box structure. The electrode tabs of the electrode group are arranged to pass through the first plastic part and the cover body in sequence along the orientation and be electrically connected to the connecting piece, and the connecting piece is also used to be electrically connected to an external electrical device. This enables the electrode group to be electrically connected to the external electrical device, and can effectively avoid the problem of occupying the internal space of the protective shell caused by arranging the connecting piece in the protective shell in the prior art. Furthermore, since the connecting piece is located outside the battery box structure, the thickness of the first plastic part can be effectively thinned compared to the prior art, thereby effectively reducing the problem of occupying the internal space of the protective shell caused by the thick plastic layer in the prior art.

[0025] Therefore, the battery cover structure has a small number of parts, high assembly efficiency, and can effectively increase the internal space of the battery box structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an assembly diagram of a battery provided by a specific embodiment of the present utility model;

[0027] Figure 2 It is a top view of the battery cover structure provided by a specific embodiment of the utility model;

[0028] Figure 3 It is a bottom view of the battery cover structure provided by a specific embodiment of the utility model;

[0029] Figure 4 This is an exploded view of the battery cover structure provided by a specific embodiment of the present utility model;

[0030] Figure 5 yes Figure 2 Sectional view along AA;

[0031] Figure 6 yes Figure 2 Partial cross-sectional view along BB;

[0032] Figure 7 yes Figure 5 Partial view at C.

[0033] In the picture:

[0034] 1. Cover plate body; 11. Insertion hole; 12. First receiving groove; 13. Second mounting hole;

[0035] 2. First plastic part; 21. Connecting portion; 22. Interference rib; 221. Guide surface; 23. Connecting hole;

[0036] 3. First mounting hole;

[0037] 4. Second plastic part; 41. Annular positioning portion; 42. Second accommodating groove;

[0038] 5. Battery housing;

[0039] 6. Liquid injection hole. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] The utility model provides a battery cover structure, such as Figure 1-6 As shown, the battery cover structure includes a cover body 1, a first plastic part 2, and a connecting piece. The cover body 1 and the first plastic part 2 are interlocked in a directional manner. The electrode assembly tabs can sequentially pass through the first plastic part 2 and the cover body 1 along the directional direction and electrically connect to the connecting piece. The connecting piece 2 is also used for electrical connection to external electrical components. Along the directional direction, the electrode assembly, the first plastic part 2, the cover body 1, and the connecting piece are arranged in sequence. The directional direction is parallel to the thickness direction of the cover body 1.

[0045] The battery cover structure connects the cover body 1 and the first plastic part 2 in a directional interference fit, which effectively reduces the number of parts and improves the assembly efficiency of the cover body 1 and the first plastic part 2 compared to the prior art.

[0046] Secondly, by arranging the electrode group, the first plastic part 2, the cover body 1 and the connecting piece to be distributed in sequence along the orientation, it can be understood that the connecting piece is located outside the battery box structure. The electrode tabs of the electrode group are arranged to pass through the first plastic part 2 and the cover body 1 in sequence along the orientation and be electrically connected to the connecting piece, and the connecting piece is also used to be electrically connected to an external electrical device. This enables the electrode group to be electrically connected to the external electrical device, and can effectively avoid the problem of occupying the internal space of the protective shell caused by arranging the connecting piece in the protective shell in the prior art. Furthermore, since the connecting piece is located outside the battery box structure, the thickness of the first plastic part 2 can be effectively thinned compared to the prior art, thereby effectively reducing the problem of occupying the internal space of the protective shell caused by the thick plastic layer in the prior art.

[0047] Therefore, the battery cover structure has a small number of parts, high assembly efficiency, and can effectively increase the internal space of the battery box structure.

[0048] Specifically, a pole is fixedly provided on the connecting piece, and the pole is used for electrically connecting to an external electrical device.

[0049] Specifically, in this embodiment, the cover body 1 is exemplarily configured to be an aluminum plate, which has the characteristics of good strength, good rigidity, light weight, and high temperature resistance.

[0050] Among them, such as Figure 4 、 Figure 5 and Figure 7As shown, one of the cover body 1 and the first plastic part 2 is provided with an inserting portion 21, and the other is provided with an inserting hole 11, and the inserting portion 21 is inserted into the inserting hole 11 along the directional interference fit, so as to achieve the directional interference fit between the cover body 1 and the first plastic part 2.

[0051] Specifically, in this embodiment, Figure 4 、 Figure 5 and Figure 7 As shown, the plug-in portion 21 is provided on the first plastic part 2, and the socket 11 is provided on the cover body 1. Preferably, the socket 11 extends through the cover body 1 along the direction. As an alternative, the socket 11 is a blind hole extending along the direction of the cover body 1. Further preferably, the plug-in portion 21 is integrally molded into the first plastic part 2, further reducing the number of parts.

[0052] As an alternative, the plug-in portion 21 is provided on the cover body 1, and the insertion hole 11 is provided on the first plastic part 2. Preferably, the insertion hole 11 extends through the first plastic part 2 along a direction. As an alternative, the insertion hole 11 is a blind hole extending along the direction of the first plastic part 2. Further preferably, the plug-in portion 21 is integrally molded with the cover body 1, further reducing the number of parts.

[0053] Specifically, in this embodiment, Figure 4 、 Figure 5 and Figure 7 As shown, the outer peripheral wall of the plug-in portion 21 is provided with interference ribs 22, which are inserted into the insertion hole 11 and have interference fit with the inner peripheral wall of the insertion hole 11, so as to realize interference insertion of the cover body 1 and the first plastic part 2 in a directional manner.

[0054] As an alternative, the inner peripheral wall of the insertion hole 11 is provided with an interference rib 22 . When the plug-in portion 21 is inserted into the insertion hole 11 along a direction, the interference rib 22 is interference-fitted with the outer peripheral wall of the plug-in portion 21 .

[0055] As another alternative, an interference rib 22 is provided on the outer peripheral wall of the plug-in portion 21 , and an interference rib 22 is provided on the inner peripheral wall of the insertion hole 11 .

[0056] Preferably, in this embodiment, the plug-in portion 21 and the interference rib 22 are integrally formed on the first plastic part 2, which can further reduce the number of parts and improve assembly efficiency.

[0057] Specifically, setting the interference margin too large increases the weight of the battery cover structure, while setting it too small can affect the connection reliability between the cover body 1 and the first plastic part 2. Therefore, in this embodiment, the interference margin of the interference rib 22 is set within a range of 0.05mm to 0.3mm. It is understood that the interference margin of the interference rib 22 can be adaptively set to 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, or 0.5mm, etc., depending on actual working conditions.

[0058] Alternatively, as Figure 7 As shown, the interference rib 22 is provided with a guide surface 221, and the guide surface 221 is used to guide the plug-in portion 21 and the plug-in hole 11. This can further improve the assembly efficiency of the cover body 1 and the first plastic part 2 as a whole.

[0059] Preferably, if Figure 7 As shown, the interference rib 22 extends in a directional manner and is rectangular, which facilitates processing.

[0060] As an alternative, the interference rib 22 extends in a certain direction and is wavy in shape.

[0061] As another alternative, the interference rib 22 extends in a directional manner, and the interference rib 22 is spirally wound around the outer circumference of the plug-in portion 21 .

[0062] As another alternative, the interference rib 22 is arc-shaped and surrounds the outer circumference of the inserting portion 21 .

[0063] As another alternative, the interference rib 22 is annularly surrounding the outer circumference of the inserting portion 21 .

[0064] More preferably, there are multiple interference ribs 22, and the multiple interference ribs 22 are spaced apart and distributed around the outer periphery of the plug-in portion 21. This arrangement can further improve the reliability of connecting the cover body 1 and the first plastic part 2.

[0065] Specifically, when the interference ribs 22 are rectangular, wavy, spiral, or arc-shaped, the plurality of interference ribs 22 are spaced apart along the circumference and / or orientation of the plug-in portion 21. When the interference ribs 22 are annular, the plurality of interference ribs 22 are spaced apart along the orientation. It is understood that the axial direction of the plug-in portion 21 is parallel to the orientation.

[0066] The battery cover structure further includes a first mounting hole 3, which directionally passes through the first plastic part 2 and the cover body 1. The tab can pass through the first mounting hole 3 to electrically connect with the connecting piece. This allows the tab to directionally pass through the first plastic part 2 and the cover body 1 in sequence to electrically connect with the connecting piece.

[0067] As an alternative, Figure 1-3 、 Figure 5 and Figure 7 As shown, the battery cover structure also includes a first mounting hole 3, which directionally passes through the first plastic part 2, the plug-in portion 21, and the cover body 1. The tab can pass through the first mounting hole 3 to electrically connect with the connecting piece. This also allows the tab to directionally pass through the first plastic part 2 and the cover body 1 in sequence to electrically connect with the connecting piece.

[0068] In this embodiment, if Figure 1-3 、 Figure 5 and Figure 7 As shown, the first mounting hole 3 preferably passes through the first plastic part 2, the plug-in portion 21 and the cover body 1 in a directional manner, and the tab can be electrically connected to the connecting piece through the first mounting hole 3. It can be understood that the portion of the first mounting hole 3 located on the cover body 1 is a portion of the plug-in hole 11. This arrangement allows the portion of the first mounting hole 3 located on the cover body 1 to be directly formed when the plug-in hole 11 is processed. Secondly, when the first plastic part 2 is formed, the portion of the first mounting hole 3 located on the first plastic part 2 can be directly formed. This can not only further reduce the weight of the battery cover structure, but also improve the processing efficiency of the battery cover structure.

[0069] Preferably, the first plastic part 2 is a plastic plate, which is convenient for processing and can effectively increase the contact area with the cover body 1. Specifically, when the plug-in portion 21 is plugged into the plug hole 11, the first plastic part 2 is in contact with the cover body 1.

[0070] Further preferably, the first plastic part 2 is an integrally formed plastic plate to reduce the number of parts.

[0071] It can be understood that the first plastic part 2 is an insulating plastic plate.

[0072] Among them, Figure 1 、 Figure 2 and Figure 4-7 As shown, the battery cover structure further includes a second plastic part 4 fixedly disposed on the cover body 1, and the first plastic part 2 and the second plastic part 4 are respectively located on both sides of the cover body 1. It can be understood that the second plastic part 4 is also located outside the battery box structure.

[0073] Preferably, the connection method between the second plastic part 4 and the cover body 1 is the same as the connection direction between the first plastic part 2 and the cover body 1. This can further reduce the number of parts and improve the assembly efficiency of the battery cover structure. The connection method between the second plastic part 4 and the cover body 1 is not further described here.

[0074] It is understandable that if Figure 4-7 As shown, along the orientation, the top surface of the first plastic part 2 contacts the inner bottom wall of the cover body 1. Along the orientation, the bottom surface of the second plastic part 4 contacts the outer top wall of the cover body 1.

[0075] Specifically, the connecting piece is fixedly mounted on the second plastic part 4. The tab can be sequentially passed through the first plastic part 2, the cover body 1, and the second plastic part 4 in a directional manner and electrically connected to the connecting piece. This fixes the position of the connecting piece, separates the connecting piece from the cover body 1, and electrically connects the tab to the connecting piece.

[0076] Furthermore, the first mounting hole 3 passes through the first plastic part 2, the cover body 1 and the second plastic part 4 in a directional manner. Figure 1-3 and Figure 5-7As shown, the first mounting hole 3 passes through the first plastic part 2, the plug-in portion 21, the cover body 1 and the second plastic part 4 in a directional manner.

[0077] In this embodiment, if Figure 1-3 and Figure 5-7 As shown, the first mounting hole 3 preferably passes through the first plastic part 2 , the plug-in portion 21 , the cover body 1 and the second plastic part 4 in a directional manner.

[0078] Preferably, along the orientation, the connecting piece is fixedly arranged on the top surface of the second plastic part 4. This facilitates the arrangement of the pole on the connecting piece and facilitates the electrical connection of the pole with an external electrical device.

[0079] Preferably, the second plastic part 4 is also a plastic plate, which is convenient for processing and can effectively increase the contact area with the outer top wall of the cover body 1.

[0080] Further preferably, the second plastic part 4 is an integrally formed plastic plate to reduce the number of parts.

[0081] It can be understood that the second plastic part 4 is an insulating plastic plate.

[0082] Alternatively, as Figure 1 、 Figure 2 and Figure 4-6 As shown, along the orientation, the outer top wall of the cover body 1 is recessed with a first accommodating groove 12, and the second plastic part 4 is fixedly disposed in the first accommodating groove 12 to improve the volume utilization rate of the cover body 1.

[0083] Specifically, in the orientation, setting the thickness of the second plastic part 4 too large will increase the weight of the battery cover structure and be detrimental to the strength of the battery cover structure. Setting the thickness of the second plastic part 4 too small will be detrimental to the provision of the first receiving groove 12 and will be detrimental to the volume utilization of the cover body 1. Therefore, in this embodiment, if Figure 5 As shown, along the orientation, the top surface of the second plastic part 4 is positioned below the outer top wall of the cover body 1, and the spacing L1 between the top surface of the second plastic part 4 and the outer top wall of the cover body 1 ranges from 0 mm to 0.5 mm. As an alternative, along the orientation, the top surface of the second plastic part 4 is positioned above the outer top wall of the cover body 1, and the spacing between the top surface of the second plastic part 4 and the outer top wall of the cover body 1 ranges from 0 mm to 1 mm.

[0084] Preferably, if Figure 2 and Figure 4-7 As shown, an annular positioning portion 41 is convexly provided on the top surface of the second plastic part 4, and a second accommodating groove 42 is formed between the annular positioning portion 41 and the top surface of the second plastic part 4. The connecting piece is located in the second accommodating groove 42 to define the setting position of the connecting piece.

[0085] Further preferably, in this embodiment, if Figure 1-3 and Figure 5-7 As shown, the first mounting hole 3 also extends through the annular positioning portion 41 in the directional direction. Specifically, the first mounting hole 3 extends through the first plastic component 2, the plug portion 21, the cover body 1, the second plastic component 4, and the annular positioning portion 41 in the directional direction. This facilitates electrical connection between the tab and the connecting piece in the second receiving groove 42. Specifically, the tab extends out of the first mounting hole 3 and folds over to electrically connect with the connecting piece in the second receiving groove 42.

[0086] Further preferably, the annular positioning portion 41 is integrally formed with the second plastic part 4 to further reduce the number of parts.

[0087] Specifically, if the distance between the outer peripheral wall of the annular positioning portion 41 and the outer peripheral wall of the second plastic part 4 is too large, the weight of the battery cover structure will increase and the strength of the battery cover structure will be detrimental. Figure 6 As shown, the spacing range L2 between the outer peripheral wall of the annular positioning portion 41 and the outer peripheral wall of the second plastic part 4 is 0 mm to 10 mm.

[0088] Specifically, if Figure 1 、 Figure 2 and Figure 4 As shown, there are two second plastic parts 4, two connecting pieces, and two tabs. The two second plastic parts 4, the two connecting pieces, and the two tabs are all arranged in a one-to-one correspondence. Specifically, one of the two tabs is a positive tab, and the other is a negative tab.

[0089] In this embodiment, each second plastic part 4 has a corresponding first mounting hole 3 .

[0090] Optionally, each second plastic part 4 corresponds to a plurality of first mounting holes 3. The positive electrode tab includes a plurality of positive electrode tab portions. The negative electrode tab includes a plurality of negative electrode tab portions. The plurality of positive electrode tab portions are provided in a one-to-one correspondence with the plurality of first mounting holes 3 corresponding to one of the second plastic parts 4. The plurality of negative electrode tab portions are provided in a one-to-one correspondence with the plurality of first mounting holes 3 corresponding to another second plastic part 4.

[0091] In this embodiment, if Figure 1-5 As shown, in an exemplary arrangement, each second plastic part 4 corresponds to two first mounting holes 3. The positive electrode tab includes two positive electrode tab portions. The negative electrode tab includes two negative electrode tab portions. The two positive electrode tab portions are arranged in a one-to-one correspondence with the two first mounting holes 3 corresponding to one of the second plastic parts 4. The two negative electrode tab portions are arranged in a one-to-one correspondence with the two first mounting holes 3 corresponding to the other second plastic part 4.

[0092] In this embodiment, if Figure 1 、 Figure 2 and Figure 4 As shown, for each second plastic part 4 , the second accommodating groove 42 is located between the two first mounting holes 3 .

[0093] Among them, Figure 1-3 As shown, the battery cover structure further includes a liquid injection hole 6, which passes through the cover body 1 and the first plastic part 2. In this embodiment, the liquid injection hole 6 is exemplarily arranged to be located between the two second plastic parts 4.

[0094] Among them, Figure 1-4 As shown, the cover body 1 also has a second mounting hole 13 for mounting an explosion-proof valve. Specifically, the first plastic component 2 also has a connecting hole 23, which connects to the second mounting hole 13 and to the interior of the battery compartment structure. The specific structure of the explosion-proof valve is known from the prior art and will not be further described here.

[0095] like Figure 1 As shown, the present invention also provides a battery, including a battery shell 5 and a pole group, and also includes the above-mentioned battery cover structure, the cover body 1 is fixedly connected to the battery shell 5 to form a battery box structure, and the pole group is arranged inside the battery box structure.

[0096] By adopting the above-mentioned battery cover structure, the number of parts is reduced and the assembly efficiency is improved; secondly, the internal space of the battery box structure can be effectively increased, so that the volume of the electrode group can be correspondingly increased, thereby effectively improving the working performance of the battery.

[0097] The specific structures of the battery housing 5 and the electrode group belong to the prior art and will not be described in detail here.

[0098] 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 battery cover structure comprising a cover body (1), a first plastic part (2) and a connecting piece; characterized in that: The cover plate body (1) and the first plastic part (2) are plugged in along a directional interference fit; The tabs of the electrode group can pass through the first plastic part (2) and the cover plate body (1) in sequence along a certain direction and be electrically connected to the connecting piece, and the connecting piece is also used for electrically connecting to an external electrical device; Along the orientation, the pole group, the first plastic part (2), the cover plate body (1) and the connecting piece are distributed in sequence; the orientation is parallel to the thickness direction of the cover plate body (1).

2. The battery cover structure according to claim 1, characterized in that: One of the cover plate body (1) and the first plastic part (2) is provided with a plug-in portion (21), and the other is provided with a plug-in hole (11), and the plug-in portion (21) is plugged into the plug-in hole (11) along the directional interference fit.

3. The battery cover structure according to claim 2, wherein: The outer peripheral wall of the plug-in portion (21) is provided with an interference rib (22), and the interference rib (22) is plugged into the plug hole (11) and has an interference fit with the inner peripheral wall of the plug hole (11); and / or, The inner peripheral wall of the insertion hole (11) is provided with an interference rib (22). When the plug-in portion (21) is plugged into the insertion hole (11) along the orientation, the interference rib (22) is interference-fitted with the outer peripheral wall of the plug-in portion (21).

4. The battery cover structure according to claim 3, characterized in that: The interference range of the interference rib (22) is 0.05mm to 0.3mm.

5. The battery cover structure according to claim 3, characterized in that: The interference rib (22) is provided with a guide surface (221), and the guide surface (221) is used to guide the plug-in connection between the plug-in portion (21) and the plug-in hole (11).

6. The battery cover structure according to claim 3, characterized in that: The interference rib (22) extends along the direction, and the interference rib (22) is rectangular.

7. The battery cover structure according to any one of claims 2 to 6, characterized in that: The battery cover structure further comprises a first mounting hole (3), the first mounting hole (3) passing through the first plastic part (2) and the cover body (1) along the direction, and the tab can pass through the first mounting hole (3) to be electrically connected to the connecting piece; or, The battery cover structure further comprises a first mounting hole (3), the first mounting hole (3) passing through the first plastic part (2), the plug-in portion (21) and the cover body (1) along the direction, and the tab can pass through the first mounting hole (3) to be electrically connected to the connecting piece.

8. The battery cover structure according to any one of claims 1 to 6, characterized in that: The first plastic part (2) is a plastic plate.

9. The battery cover structure according to any one of claims 1 to 6, characterized in that: The battery cover structure further comprises a second plastic part (4) fixedly arranged on the cover body (1), the first plastic part (2) and the second plastic part (4) being respectively located on both sides of the cover body (1) along the orientation; the connecting piece is fixedly arranged on the second plastic part (4); The tab can sequentially pass through the first plastic part (2), the cover plate body (1) and the second plastic part (4) along the orientation and be electrically connected to the connecting piece.

10. A battery comprising a battery housing (5) and a pole group, characterized in that: It also includes the battery cover structure according to any one of claims 1 to 9, wherein the cover body (1) is fixedly connected to the battery shell (5) to form a battery box structure, and the electrode group is arranged in the battery box structure.

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