Battery case assembly

Abstract

The utility model relates to the technical field of batteries, and provides a battery shell component, a shell comprises an end cover and a shell main body, the end cover is arranged at an opening of the shell main body and is sealed with the shell main body along the circumferential direction, and the end cover is provided with a first avoiding hole and a first tab through hole; the first plastic part is arranged on one side, back to the shell main body, of the end cover and is provided with a second tab through hole; the second plastic part is arranged in the shell and is close to the end cover, the second plastic part is provided with a shaping structure, and the plurality of tabs sequentially penetrate through the first tab through hole and the second tab through hole after being gathered together through the shaping structure; the riveting column penetrates through the first receding hole and is connected with the first plastic part and the second plastic part, and the end cover is clamped between the first plastic part and the second plastic part. Therefore, on one hand, the processing technology of the battery shell assembly is simple, and the riveting column can limit the relative movement of the first plastic part, the second plastic part and the end cover, so that the relative movement of the three parts is reduced, and the tab can be protected from being extruded to deform or damaged by any one of the three parts.

Description

Technical Field

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

[0002] Generally, a battery consists of two parts: a shell and a stage group. The stage group is placed in the shell. The stage group includes multiple stacked pole pieces, each of which is connected to a pole ear. The pole ear needs to extend out of the shell and connect to the pole column. However, multiple pole ears are not easy to sort out and integrate, which makes the sorting work cumbersome when assembling the battery.

[0003] Moreover, the tab needs to pass through the second plastic part, the end cover and the first plastic part in sequence. During the assembly process of the battery or when the vehicle equipped with the battery vibrates, it is easy to cause relative movement of the second plastic part, the end cover and the first plastic part. If the tab is squeezed by any of them, it is easy to deform or break, or the connection between the tab and the electrode sheet may fail. The above situations will lead to poor contact inside the battery and unstable power supply.

[0004] Therefore, there is an urgent need for a battery shell assembly to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a battery shell assembly that can simplify the processing technology of the battery and protect the tabs to avoid the problem of poor contact of the battery due to the above reasons.

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

[0007] A battery housing assembly, comprising:

[0008] A housing, the housing comprising an end cover and a housing body, the end cover being mounted on an open portion of the housing body and being circumferentially sealed with the housing body, the end cover being provided with a first avoidance hole and a first tab through-hole;

[0009] A first plastic part, the first plastic part is arranged on a side of the end cover facing away from the shell body and is provided with a second tab through hole;

[0010] A second plastic part, the second plastic part is arranged in the housing and close to the end cover, the second plastic part is provided with a shaping structure, and a plurality of tabs are gathered by the shaping structure and then sequentially pass through the first tab through-hole and the second tab through-hole;

[0011] A rivet post is passed through the first avoidance hole, the rivet post connects the first plastic part and the second plastic part, and the end cover is clamped between the first plastic part and the second plastic part.

[0012] As a preferred technical solution for the above-mentioned battery shell assembly, one end of the above-mentioned rivet column is fixed to the above-mentioned second plastic part, the above-mentioned first plastic part is provided with a second avoidance hole, the other end of the above-mentioned rivet column passes through the above-mentioned first avoidance hole and the above-mentioned second avoidance hole in sequence to form a rivet cap, and the above-mentioned first plastic part is clamped between the above-mentioned end cover and the above-mentioned rivet cap.

[0013] As a preferred technical solution for the above-mentioned battery shell assembly, there are n first avoidance holes, m second avoidance holes, k rivet posts, and k rivet posts can connect the first avoidance holes and the second avoidance holes, satisfying n≥k≥2, m≥k≥2.

[0014] As a preferred technical solution for the above-mentioned battery shell assembly, a receiving groove is provided on the side of the above-mentioned end cover facing away from the above-mentioned shell body, and the above-mentioned first plastic part is placed in the above-mentioned receiving groove. In the depth direction of the above-mentioned receiving groove and with the side facing away from the above-mentioned shell body as the positive direction, the lower end face of the above-mentioned first plastic part is adjacent to the bottom wall of the above-mentioned receiving groove, and the distance between the upper end face of the above-mentioned first plastic part and the open side end face of the above-mentioned receiving groove is -0.5H to 1H, where H is the thickness of the above-mentioned end cover.

[0015] As a preferred technical solution of the above-mentioned battery shell assembly, the above-mentioned first tab through hole is formed on the bottom wall of the above-mentioned accommodating groove.

[0016] As a preferred technical solution of the above-mentioned battery shell assembly, a flange edge is provided on the peripheral edge of the above-mentioned first plastic part.

[0017] As a preferred technical solution of the above-mentioned battery shell assembly, in the radial direction of the above-mentioned accommodating groove, the length dimension of the above-mentioned flange edge is between 0 and 10 mm.

[0018] As a preferred technical solution of the above-mentioned battery shell assembly, the above-mentioned end cover is installed with an explosion-proof valve, and the above-mentioned explosion-proof valve is used to adjust the air pressure in the above-mentioned shell.

[0019] As a preferred technical solution of the above-mentioned battery shell assembly, the above-mentioned end cover is provided with a liquid injection hole, and the above-mentioned liquid injection hole can connect the indoor and outdoor environments of the above-mentioned shell.

[0020] As a preferred technical solution for the above-mentioned battery shell assembly, the above-mentioned shaping structure is a shaping hole, and the width of the opening of the above-mentioned shaping hole on the side facing away from the above-mentioned shell body is A, satisfying A<B, B is the width of the opening of the above-mentioned shaping hole toward the side of the above-mentioned shell body, and the width direction of the above-mentioned shaping hole is parallel to the stacking direction of the electrode sheets.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a battery shell assembly, comprising a shell, a first plastic part, a second plastic part, and a rivet stud. The shell comprises an end cap and a shell body, wherein the end cap is mounted on the open portion of the shell body and is circumferentially sealed therewith, and has a first avoidance hole and a first tab through-hole defined therein; the first plastic part is disposed on the side of the end cap facing away from the shell body and has a second tab through-hole defined therein; the second plastic part is disposed within the shell and adjacent to the end cap, and has a shaping structure defined therein, through which multiple tabs are gathered and sequentially passed through the first tab through-hole and the second tab through-hole; the rivet stud extends through the first avoidance hole, connecting the first plastic part and the second plastic part, and the end cap is sandwiched between the first plastic part and the second plastic part.

[0023] Specifically, the shell body includes a bottom wall and a peripheral side wall, which are fixed to form an accommodating space with an opening on one side, and the stage group is placed in the accommodating space; the end cover is buckled into the opening of the shell body and sealed with the shell body along the circumferential direction, so that the accommodating space is a relatively sealed space, and a first plastic part and a second plastic part are respectively installed on opposite sides of the end cover, wherein the first plastic part is located outside the accommodating space, and the second pole ear through hole opened in the first plastic part corresponds to the first pole ear through hole opened in the end cover, and the second plastic part is located between the stage group and the end cover, and the second plastic part is provided with a shaping structure, and the stage group includes multiple pole pieces, each pole piece is connected to a pole ear, and the multiple pole ears are gathered by the shaping structure, concentratedly pass through the first pole ear through hole and the second pole ear through hole and extend out of the shell for connection with the pole. Furthermore, the first plastic part and the second plastic part are fixed by hot melting or hot riveting through a rivet post, one end of the rivet post is connected to the first plastic part, and the other end passes through the first avoidance hole and is fixed to the second plastic part. On the one hand, the processing technology is simple, and on the other hand, the rivet post can limit the relative movement of the first plastic part, the second plastic part and the end cover, reduce the relative movement of the three, and protect the tab from being squeezed, deformed or damaged by any of the three. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0025] Figure 1 This is an exploded schematic diagram of a battery housing assembly provided by an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the assembly of a battery housing assembly provided by an embodiment of the present utility model;

[0027] Figure 3 1 is a top view of a battery housing assembly provided by an embodiment of the present utility model;

[0028] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle;

[0029] Figure 5 yes Figure 4 Cross-sectional view at the middle BB;

[0030] Figure 6 yes Figure 5 A partial enlarged view of point C in the middle.

[0031] In the picture:

[0032] X, first direction; Y, second direction;

[0033] 100, housing; 110, end cover; 111, first avoidance hole; 112, accommodating groove; 113, liquid injection hole; 114, first tab through hole; 120, housing body;

[0034] 200, second plastic part; 210, shaping hole;

[0035] 300, first plastic part; 310, second tab through hole; 320, second avoidance hole; 330, flange edge;

[0036] 400, rivet stud;

[0037] 500. Explosion-proof valve. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] like Figures 1 to 6 As shown, the present invention provides a battery housing assembly, including a housing 100 , a first plastic part 300 , a second plastic part 200 and a rivet post 400 . Among them, the shell 100 includes an end cover 110 and a shell body 120, the end cover 110 is installed at the open part of the shell body 120 and is sealed with the shell body 120 along the circumferential direction, and the end cover 110 has a first avoidance hole 111 and a first pole ear through hole 114; the first plastic part 300 is arranged on the side of the end cover 110 facing away from the shell body 120, and has a second pole ear through hole 310; the second plastic part 200 is arranged in the shell 100 and is close to the end cover 110, and the second plastic part 200 is provided with a shaping structure, and multiple pole ears are gathered through the shaping structure and pass through the first pole ear through hole 114 and the second pole ear through hole 310 in sequence; the rivet column 400 passes through the first avoidance hole 111, the rivet column 400 connects the first plastic part 300 and the second plastic part 200, and the end cover 110 is clamped between the first plastic part 300 and the second plastic part 200.

[0043] Specifically, the shell body 120 includes a bottom wall and a peripheral side wall, which are fixed to form an accommodating space with an opening on one side, and the stage group is placed in the accommodating space; the end cover 110 is snapped on the opening of the shell body 120 and sealed with the shell body 120 along the circumferential direction, so that the accommodating space is a relatively sealed space, and the first plastic part 300 and the second plastic part 200 are respectively installed on the opposite sides of the end cover 110, wherein the first plastic part 300 is located outside the accommodating space, and the second pole ear through hole 310 opened in the first plastic part 300 corresponds to the first pole ear through hole 114 opened in the end cover 110, and the second plastic part 200 is located between the stage group and the end cover 110, and the second plastic part 200 is provided with a plastic structure, and the stage group includes multiple pole pieces, each of which is connected to a pole ear, and the multiple pole ears are gathered by the plastic structure, concentratedly pass through the first pole ear through hole 114 and the second pole ear through hole 310 and extend out of the shell 100 for connection with the pole. Furthermore, the first plastic part 300 and the second plastic part 200 are fixed by hot melting or hot riveting through a rivet post 400. One end of the rivet post 400 is connected to the first plastic part 300, and the other end passes through the end cover 110 through the first avoidance hole 111 and is fixed to the second plastic part 200. On the one hand, the processing technology is simple, and on the other hand, the rivet post 400 can limit the relative movement of the first plastic part 300, the second plastic part 200 and the end cover 110, reducing the relative movement of the three, thereby protecting the tab from being squeezed, deformed or damaged by any of the three.

[0044] Specifically, the end cover 110 is a plain aluminum plate.

[0045] Optionally, one end of the rivet column 400 is fixed to the second plastic part 200, and the first plastic part 300 is provided with a second avoidance hole 320. The other end of the rivet column 400 passes through the first avoidance hole 111 and the second avoidance hole 320 in sequence to form a rivet cap, and the first plastic part 300 is clamped between the end cover 110 and the rivet cap.

[0046] Exemplarily, one end of the rivet column 400 is fixedly connected to the second plastic part 200. During assembly, the end cover 110 can be first stacked on the second plastic part 200 so that the other end of the rivet column 400 extends from the first avoidance hole 111, and then the first plastic part 300 is stacked on the end cover 110. The other end of the rivet column 400 can pass through the second avoidance hole 320. After the end of the other end of the rivet column 400 is heated and softened, the die head is used to extrude the end of the rivet column 400 toward the side of the end cover 110, so that the end is deformed to form a rivet cap. The maximum radial dimension of the rivet cap is larger than the maximum aperture of the second avoidance hole 320, and the rivet cap abuts against the end face of the first plastic part 300 facing away from the end cover 110. In this way, the first plastic part 300 is clamped between the rivet cap and the end cover 110.

[0047] Optionally, the rivet stud 400 and the second plastic part 200 are integrally formed, or fixed by other means such as gluing.

[0048] In other embodiments, during assembly, the first plastic part 300 and the end cover 110 are assembled first, so that the first avoidance hole 111 and the second avoidance hole 320 are aligned, and then they are mounted on the rivet 400 of the second plastic part 200 .

[0049] In other embodiments, one end of the rivet stud 400 is pre-fixed to the first plastic part 300 , and the other end sequentially passes through the end cover 110 and the second plastic part 200 to form a rivet cap on the side of the second plastic part 200 facing away from the end cover 110 .

[0050] Optionally, n first avoidance holes 111 are provided, m second avoidance holes 320 are provided, and k rivet studs 400 are provided. These k rivet studs 400 can connect the first avoidance holes 111 and the second avoidance holes 320, satisfying n ≥ k ≥ 2 and m ≥ k ≥ 2. In this manner, at least two rivet studs 400 can connect the first plastic part 300 and the second plastic part 200. The distribution of the at least two rivet studs 400 restricts axial rotation of the first plastic part 300 relative to the end cap 110.

[0051] In other embodiments, among the first avoidance hole 111 and the second avoidance hole 320, at least the radial cross-section of the second avoidance hole 320 is a polygon, and the radial cross-section of the plug-in portion of the rivet stud 400 and the second avoidance hole 320 is a corresponding polygon. In this way, the setting of the radial cross-sections of the rivet stud 400 and the second avoidance hole 320 can prevent the first plastic part 300 from rotating around the rivet stud 400 relative to the end cover 110.

[0052] Optionally, a receiving groove 112 is provided on the side of the end cover 110 facing away from the shell body 120, and the first plastic part 300 is placed in the receiving groove 112. In the depth direction of the receiving groove 112 and with the side facing away from the shell body 120 as the positive direction, the lower end face of the first plastic part 300 is adjacent to the bottom wall of the receiving groove 112, and the distance between the upper end face of the first plastic part 300 and the open side end face of the receiving groove 112 is -0.5H to 1H, where H is the thickness of the end cover 110.

[0053] Thus, by providing a receiving groove 112 on the end cap 110 for accommodating the first plastic part 300, at least a portion of the first plastic part 300 is located within the receiving groove 112. The groove extends beyond the end face of the end cap 110 but is smaller than the original size of the first plastic part 300. This effectively utilizes the space and reduces the external space occupied. However, if the receiving groove 112 is too deep, the structural strength of the housing 100 will be affected. If it is too shallow, the space utilization of the housing 100 will be detrimental.

[0054] Optionally, the first tab through hole 114 is formed on the bottom wall of the accommodating groove 112 .

[0055] Optionally, a flange 330 is provided on the peripheral edge of the first plastic part 300. Specifically, the peripheral edge of the first plastic part 300 is connected to the end cover 110 and / or the second plastic part 200 via the flange structure to prevent the first plastic part 300 from flanging.

[0056] Preferably, the length of the flange edge 330 in the radial direction of the receiving groove 112 is between 0 and 10 mm. In this way, the flange size is controlled within a certain range, thereby limiting the weight and manufacturing cost of the first plastic part 300 and the size of the end cap 110.

[0057] Optionally, the end cover 110 is equipped with an explosion-proof valve 500, which is used to regulate the air pressure in the shell 100. The stage group is placed in the shell 100. When the stage group malfunctions, the stage group generates a large amount of gas, causing the air pressure in the shell 100 to rise. If the pressure cannot be relieved in time, it is easy to cause the shell 100 to explode. In this embodiment, the end cover 110 is provided with an air vent that can connect the indoor and outdoor environments of the shell 100. The explosion-proof valve 500 is installed at the air vent. When the air pressure in the shell 100 is greater than the preset pressure threshold of the explosion-proof valve 500, the explosion-proof valve 500 opens, and the air vent connects the indoor and outdoor environments of the shell 100 to quickly relieve the pressure.

[0058] Optionally, the end cap 110 is provided with a liquid injection hole 113 , which can connect the indoor environment and the outdoor environment of the housing 100 . The electrolyte can be introduced into or discharged from the housing 100 through the liquid injection hole 113 .

[0059] Optionally, the shaping structure is a shaping hole 210, the width of the opening of the shaping hole 210 on the side facing away from the shell body 120 is A, satisfying A<B, B is the width of the opening of the shaping hole 210 on the side facing the shell body 120, and the width direction of the shaping hole 210 is parallel to the stacking direction of the pole pieces. Specifically, a stage group is installed in the shell 100, the stage group consists of a plurality of pole pieces stacked along a first direction X, and the pole pieces are connected to pole tabs, which are used to electrically connect to the poles. The stage group is inserted into the shell body 120 along a second direction Y, and the end cover 110 is buckled with the shell body 120 along the second direction Y. The depth direction of the shaping hole 210 of the second plastic part 200 is parallel to the second direction Y, and the width direction of the shaping hole 210 is parallel to the first direction X. In this way, through the closing design of the shaping hole 210, the pole tabs connected to the multiple pole pieces are gathered and extended in a concentrated manner.

[0060] Furthermore, the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery housing assembly, characterized in that: include: A housing (100), the housing (100) comprising an end cover (110) and a housing body (120), the end cover (110) being mounted on an open portion of the housing body (120) and being circumferentially sealed with the housing body (120), the end cover (110) being provided with a first avoidance hole (111) and a first tab through hole (114); A first plastic part (300), the first plastic part (300) being arranged on a side of the end cover (110) facing away from the shell body (120) and having a second tab through hole (310); A second plastic part (200), the second plastic part (200) being arranged in the housing (100) and close to the end cover (110), the second plastic part (200) being provided with a shaping structure, and a plurality of tabs being gathered by the shaping structure and then sequentially passing through the first tab through-hole (114) and the second tab through-hole (310); A rivet post (400) is passed through the first avoidance hole (111), the rivet post (400) connects the first plastic part (300) and the second plastic part (200), and the end cover (110) is sandwiched between the first plastic part (300) and the second plastic part (200).

2. The battery housing assembly according to claim 1, wherein: One end of the rivet column (400) is fixed to the second plastic part (200), the first plastic part (300) is provided with a second avoidance hole (320), the other end of the rivet column (400) passes through the first avoidance hole (111) and the second avoidance hole (320) in sequence to form a rivet cap, and the first plastic part (300) is clamped between the end cover (110) and the rivet cap.

3. The battery housing assembly according to claim 2, wherein: The first avoidance holes (111) are provided with n numbers, the second avoidance holes (320) are provided with m numbers, and the rivet posts (400) are provided with k numbers. The k rivet posts (400) can connect the first avoidance holes (111) and the second avoidance holes (320), and n≥k≥2 and m≥k≥2 are satisfied.

4. The battery housing assembly according to claim 1, wherein: The end cover (110) is provided with a receiving groove (112) on the side facing away from the shell body (120), and the first plastic part (300) is placed in the receiving groove (112). In the depth direction of the receiving groove (112) and with the side facing away from the shell body (120) as the positive direction, the lower end surface of the first plastic part (300) is adjacent to the bottom wall of the receiving groove (112), and the distance between the upper end surface of the first plastic part (300) and the end surface of the opening side of the receiving groove (112) is -0.5H to 1H, where H is the thickness of the end cover (110).

5. The battery housing assembly according to claim 4, wherein: The first tab through hole (114) is formed on the bottom wall of the accommodating groove (112).

6. The battery housing assembly according to claim 4, wherein: A flange (330) is provided on the peripheral edge of the first plastic part (300).

7. The battery housing assembly according to claim 6, wherein: In the radial direction of the accommodating groove (112), the length dimension of the flange edge (330) is between 0 and 10 mm.

8. The battery housing assembly according to claim 1, wherein: The end cover (110) is equipped with an explosion-proof valve (500), and the explosion-proof valve (500) is used to adjust the air pressure in the housing (100).

9. The battery housing assembly according to claim 1, wherein: The end cover (110) is provided with a liquid injection hole (113), and the liquid injection hole (113) can connect the indoor environment and the outdoor environment of the housing (100).

10. The battery housing assembly according to any one of claims 1 to 9, characterized in that: The shaping structure is a shaping hole (210), the width of the opening of the shaping hole (210) on the side facing away from the shell body (120) is A, and A<B is satisfied, B is the width of the opening of the shaping hole (210) on the side facing the shell body (120), and the width direction of the shaping hole (210) is parallel to the stacking direction of the pole pieces.

Images