Battery shell assembly and battery module

Abstract

The utility model discloses a battery shell assembly and a battery module, and belongs to the technical field of batteries. The battery shell assembly comprises a shell, an accommodating cavity is formed in the shell, a battery cell is mounted in the accommodating cavity, a first tab through hole is formed in the top wall of the shell, and the first tab through hole is communicated with the accommodating cavity; the plastic part comprises a first plastic part with a second tab through hole, the first plastic part is arranged on the outer side of the top wall, and the second tab through hole is opposite to the first tab through hole; the connecting piece is arranged on one side, far away from the shell, of the first plastic part, the connecting piece is clamped with the first plastic part, and the tab of the battery cell in the accommodating cavity can sequentially penetrate through the first tab through hole and the second tab through hole and is electrically connected with the connecting piece. According to the utility model, the utilization rate of the internal space of the battery shell can be improved, and the energy density of the battery module can be increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery shell subassembly and battery module. BACKGROUND

[0002] With the rapid development of new energy vehicles, electric vehicles and electric tools and each field, the battery module for providing stable power supply has been widely applied.

[0003] In prior art, the shell assembly of battery module includes cover plate and protective shell with assembly port, the battery cell is put into the protective shell from the assembly port, then the cover plate is covered on the protective shell to ensure sealed assembly.

[0004] Since the connecting piece and the pole bottom are both located in the protective shell, it is not conducive to improve the utilization rate of the internal space of the battery shell.

[0005] Therefore, it is urgent to provide a battery shell subassembly and battery module to solve the above problems. SUMMARY

[0006] The utility model discloses a battery shell subassembly and battery module can improve the utilization rate of the internal space of the battery shell, help to increase the energy density of the battery module.

[0007] To achieve the above object, the following technical scheme is provided:

[0008] The battery shell subassembly comprises:

[0009] The shell is internally provided with a containing cavity, the containing cavity is used for installing the battery cell, the top wall of the shell is provided with a first tab through hole, and the first tab through hole is communicated with the containing cavity.

[0010] The plastic part comprises a first plastic part provided with a second tab through hole, the first plastic part is arranged on the outer side of the top wall, and the second tab through hole is arranged opposite to the first tab through hole.

[0011] The connecting piece is arranged on the side, away from the shell, of the first plastic part, the connecting piece is clamped with the first plastic part, and the tab of the battery cell in the containing cavity can pass through the first tab through hole and the second tab through hole in sequence and be electrically connected with the connecting piece.

[0012] As an optional scheme of the battery shell subassembly, at least two first buckles are arranged on the first plastic part at intervals, and the first buckles are clamped with the end face, away from the shell, of the connecting piece.

[0013] As an optional solution of the battery shell assembly, the first plastic part is concave with a positioning groove, at least two first buckles are respectively located at opposite sides of the positioning groove, and the connecting sheet is arranged in the positioning groove.

[0014] As an optional solution of the battery shell assembly, at least two first buckles are arranged at intervals in a first direction, and / or

[0015] At least two first buckles are arranged at intervals in a second direction.

[0016] As an optional solution of the battery shell assembly, at least two second buckles are arranged at intervals on the connecting sheet, and the second buckles are clamped with corresponding first buckles.

[0017] As an optional solution of the battery shell assembly, the plastic part further comprises a second plastic part, the second plastic part is arranged on the inner side of the top wall, and the tab can pass through the third tab through hole, the first tab through hole and the second tab through hole in sequence and be electrically connected with the connecting sheet.

[0018] As an optional solution of the battery shell assembly, the plastic part further comprises an intermediate connecting sleeve, the first plastic part, the intermediate connecting sleeve and the second plastic part are integrated structures, and the second tab through hole of the first plastic part and the third tab through hole of the second plastic part are communicated with each other through the intermediate connecting sleeve.

[0019] As an optional solution of the battery shell assembly, the battery shell assembly further comprises an explosion-proof valve protection film, the top wall is provided with an explosion-proof valve, the explosion-proof valve protection film is arranged on the explosion-proof valve, and the second plastic part is provided with a plurality of air holes, each air hole is arranged opposite to the explosion-proof valve.

[0020] As an optional solution of the battery shell assembly, the top wall is provided with a liquid injection port, the second plastic part is provided with a liquid adding through hole, and the liquid injection port and the liquid adding through hole are arranged opposite to each other.

[0021] A battery module comprises a battery cell and the above-mentioned battery shell assembly, and the battery cell is arranged in the shell of the battery shell assembly.

[0022] Compared with the prior art, the battery shell assembly has the following beneficial effects:

[0023] The battery shell assembly provided by the utility model, first tab through holes are arranged on the top wall of the shell body, the first plastic part of the plastic part is arranged on the outer side of the top wall, and the connecting piece made of conductive material is installed on the side of the first plastic part away from the shell body, the connecting piece and the first plastic part are connected in a clamping and matching mode, the stability of the connection between the connecting piece and the first plastic part is ensured, and the assembly difficulty of the connecting piece and the first plastic part is reduced. Since the second tab through hole of the first plastic part is arranged opposite to the first tab through hole of the shell body, the tab of the battery cell in the accommodating cavity of the shell body can pass through the first tab through hole and the second tab through hole in sequence and be electrically connected to the connecting piece after being bent. By arranging the connecting piece on the outer side of the shell body, the utilization rate of the internal space of the battery shell body can be improved, and the energy density of the battery module can be increased.

[0024] The battery module provided by the utility model comprises a battery cell and the battery shell assembly mentioned above, the tab of the battery cell in the shell body is electrically connected to the connecting piece by passing through the top wall and the first plastic part of the shell body and being bent, the utilization rate of the internal space of the battery shell body can be improved, and the energy density of the battery module can be increased. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and the drawings by those skilled in the art without creating labor.

[0026] Figure 1 It is the assembly schematic view of the battery shell assembly in the first perspective of the embodiments of the utility model.

[0027] Figure 2 It is the explosion schematic view of the battery shell assembly in the embodiments of the utility model.

[0028] Figure 3 It is Figure 2 It is the local enlarged view of position A in the middle.

[0029] Figure 4 It is the assembly schematic view of the battery shell assembly in the second perspective of the embodiments of the utility model.

[0030] Figure 5 It is the schematic view of the single clamping type structure of the first buckle in the embodiments of the utility model.

[0031] Figure 6 It is the schematic view of the double clamping type structure of the first buckle in the embodiments of the utility model.

[0032] Figure 7Structure schematic view of the second clamping hook in the embodiment of the present utility model;

[0033] Figure 8 Explosion schematic view of the plastic part in the embodiment of the present utility model;

[0034] Figure 9 Sectional view of the battery shell assembly in the embodiment of the present utility model;

[0035] Figure 10 For Figure 9 Local enlarged view of B in the middle;

[0036] Figure 11 For Figure 9 Local enlarged view of C in the middle;

[0037] Figure 12 For Figure 9 Sectional view of D-D in the middle.

[0038] Reference signs:

[0039] 1, shell; 2, plastic part; 3, connecting sheet; 4, explosion-proof valve protection film;

[0040] 11, accommodating cavity; 12, top wall; 121, explosion-proof valve; 122, liquid injection hole; 123, mounting groove; 124, first pole lug through hole;

[0041] 21, first plastic part; 211, first clasp; 2111, first clamping hook part; 212, positioning groove; 213, second pole lug through hole; 214, flange edge; 22, second plastic part; 221, third pole lug through hole; 222, air hole; 223, liquid adding through hole; 23, intermediate connecting sleeve;

[0042] 31, second clasp; 311, second clamping hook part; DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present utility model clearer, the technical scheme in the embodiments of the present utility model will be described clearly and completely below in combination with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. The components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] In the description of the utility model, it is necessary to explain that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] In the description of the utility model, it is also necessary to explain that, unless otherwise specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, and it can be mechanically connected or electrically connected. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0046] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model and cannot be understood as limiting the utility model.

[0047] In order to improve the utilization rate of the internal space of the battery shell, increase the energy density of the battery module, the embodiment provides a battery shell assembly and a battery module, which are described below in combination with Figures 1 to 12 The specific content of the embodiment is described in detail. It should be noted that the first direction mentioned in the embodiment is the X direction in Figure 1 The second direction mentioned in the embodiment is the Y direction in Figure 1 .

[0048] As shown in Figures 1 to 4As shown, the battery shell assembly in the embodiment includes a shell 1, a plastic part 2 and a connecting piece 3. The shell 1 is provided with a containing cavity 11 for accommodating an electric core, and the top wall 12 of the shell 1 is provided with a first tab through hole 124 which is in communication with the containing cavity 11. The plastic part 2 includes a first plastic part 21 provided with a second tab through hole 213, and the first plastic part 21 is arranged on the outer side of the top wall 12, and the second tab through hole 213 is arranged opposite to the first tab through hole 124. The connecting piece 3 is arranged on the side of the first plastic part 21 away from the shell 1, and the connecting piece 3 is clamped with the first plastic part 21, and the tab of the electric core arranged in the containing cavity 11 can pass through the first tab through hole 124 and the second tab through hole 213 in sequence and be electrically connected with the connecting piece 3. Exemplarily, the shell 1 and the connecting piece 3 can be made of metal.

[0049] Briefly, the battery shell assembly provided by the utility model is provided with the first tab through hole 124 on the top wall 12 of the shell 1, the first plastic part 21 of the plastic part 2 is arranged on the outer side of the top wall 12, and the connecting piece 3 made of conductive material is arranged on the side of the first plastic part 21 away from the shell 1, and the connecting piece 3 is clamped with the first plastic part 21 in a matching mode, thereby ensuring the connection stability of the connecting piece 3 and the first plastic part 21 and reducing the assembly difficulty of the connecting piece 3 and the first plastic part 21. Since the second tab through hole 213 of the first plastic part 21 is arranged opposite to the first tab through hole 124 of the shell 1, the tab of the electric core arranged in the containing cavity 11 of the shell 1 can pass through the first tab through hole 124 and the second tab through hole 213 in sequence and be electrically connected with the connecting piece 3 after being bent. By arranging the connecting piece 3 on the outer side of the shell 1, the utilization rate of the internal space of the battery shell 1 can be improved, and the energy density of the battery module can be increased.

[0050] Further, as shown in the drawings, Figure 2 In combination Figure 3 As shown, the first plastic part 21 is provided with at least two first buckles 211 arranged at intervals, and the first buckles 211 are clamped with the end face of the connecting piece 3 away from the shell 1. By arranging the first buckles 211 on the left and right sides of the first plastic part 21, the connecting piece 3 can be pressed on the upper surface of the first plastic part 21 by the first buckles 211.

[0051] Further, the first plastic part 21 is recessed with a positioning groove 212, and the at least two first buckles 211 are respectively arranged on the opposite sides of the positioning groove 212, and the connecting piece 3 is arranged in the positioning groove 212. By adding the positioning groove 212, the position of the connecting piece 3 on the first plastic part 21 is limited, so that the connecting piece 3 is prevented from falling off. The sum of the depth of the positioning groove 212 and the height of the first buckle 211 is not more than the thickness of the connecting piece 3. When the thickness of the top wall 12 of the shell 1 is H, the distance L1 between the surface of the first plastic part 21 and the upper surface of the shell 1 is-1H to 0.5H (negative is beyond the surface of the shell 1).

[0052] Further, the at least two first buckles 211 are arranged at intervals in the first direction, and / or the at least two first buckles 211 are arranged at intervals in the second direction. By arranging the first buckles 211 around the connection piece 3, the mounting firmness of the connection piece 3 and the first plastic part 21 is further ensured. Optionally, as shown in Figure 5 and Figure 6 shown, the first buckle 211 can be a single buckle or a double buckle structure. When the first buckle 211 is a double buckle structure, the two first buckle hooks 2111 of the first buckle 211 are both arranged outward.

[0053] Further, at least two second buckles 31 are arranged at intervals on the connection piece 3, and the second buckles 31 and the corresponding first buckles 211 are mutually buckled, so that the connection piece 3 and the first plastic part 21 are mutually buckled. As shown in Figure 7 shown, the second buckle 31 can be a double buckle structure, and the two second buckle hooks 311 of the second buckle 31 are both arranged inward.

[0054] Further, the plastic part 2 further comprises a second plastic part 22, and the second plastic part 22 is provided with a third tab through hole 221, and the second plastic part 22 is arranged on the inner side of the top wall 12. The tab can pass through the third tab through hole 221, the first tab through hole 124 and the second tab through hole 213 in sequence and be electrically connected with the connection piece 3. The first plastic part 21 and the second plastic part 22 in the embodiment can be a split type, and by installing the second plastic part 22 between the top wall 12 of the shell 1 and the battery cell, the direct contact between the battery cell and the shell 1 is isolated, and the risk of the shell 1 conducting electricity is avoided.

[0055] In some application scenarios, as shown in Figures 2 to 12 shown, the first plastic part 21 and the second plastic part 22 in the plastic part 2 in the embodiment can also be a one-piece type. The plastic part 2 further comprises an intermediate connecting sleeve 23, and the first plastic part 21, the intermediate connecting sleeve 23 and the second plastic part 22 are a one-piece structure, and the second tab through hole 213 of the first plastic part 21 and the third tab through hole 221 of the second plastic part 22 are in communication with each other through the intermediate connecting sleeve 23. The intermediate connecting sleeve 23 is located in the first tab through hole 124, and the tab of the battery cell is electrically connected with the connection piece 3 after passing through the third tab through hole 221, the intermediate connecting sleeve 23 and the second tab through hole 213 in sequence.

[0056] Further, the battery shell assembly further comprises an explosion-proof valve protection film 4, the top wall 12 is provided with an explosion-proof valve 121, the explosion-proof valve protection film 4 is arranged on the explosion-proof valve 121, and the second plastic part 22 is provided with a plurality of air holes 222, each air hole 222 is arranged opposite to the explosion-proof valve 121. By additionally arranging the explosion-proof valve 121 and the explosion-proof valve protection film 4, when high-pressure gas is generated in the shell 1 of the battery module due to a fault, the high-pressure gas can be quickly discharged. Optionally, the notch on the explosion-proof valve 121 can face the inside of the shell 1 or the outside of the shell 1.

[0057] Further, the top wall 12 is provided with a liquid injection port, and the second plastic part 22 is provided with a liquid injection through hole 223, and the liquid injection port is arranged opposite to the liquid injection through hole 223. By additionally arranging the liquid injection port, the electrolyte can be conveniently injected into the battery shell assembly. The electrolyte can transmit ions between the positive and negative electrodes of the battery, thereby ensuring that the battery can work normally. Optionally, the liquid injection port can be arranged near the positive electrode side of the shell 1, or near the negative electrode side of the shell 1 or between the positive and negative electrodes, which is not limited here.

[0058] Further, the flange edge 214 is circumferentially arranged on the outer edge of the first plastic part 21. By arranging the flange edge 214 in abutment with the top wall 12 of the shell 1, the contact area of the first plastic part 21 and the shell 1 is increased. Exemplarily, the width L2 of the flange edge 214 is 1mm-10mm.

[0059] Further, the top wall 12 is concavely provided with a mounting groove 123, and the first plastic part 21 is arranged in the mounting groove 123. By additionally arranging the mounting groove 123, the first plastic part 21 can be accommodated outside the shell 1.

[0060] The embodiment also provides a battery module, which comprises a battery shell assembly mentioned above and a battery cell, and the battery cell is arranged in the shell 1 of the battery shell assembly. The tab of the battery cell arranged in the shell 1 is electrically connected with the connecting piece 3 by penetrating the top wall 12 of the shell 1 and the first plastic part 21 and being bent, which not only can improve the utilization rate of the internal space of the battery shell 1, but also can help to increase the energy density of the battery module.

[0061] It should be noted that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A battery housing assembly, characterized in that: include: A housing (1) is provided with a housing cavity (11) therein, wherein the housing cavity (11) is used to install a battery cell, and a first tab through-hole (124) is provided on a top wall (12) of the housing (1), wherein the first tab through-hole (124) is in communication with the housing cavity (11); A plastic part (2) comprising a first plastic part (21) having a second tab through hole (213), wherein the first plastic part (21) is arranged on the outside of the top wall (12), the second tab through hole (213) is arranged opposite to the first tab through hole (124), and at least two first buckles (211) are arranged on the first plastic part (21); A connecting piece (3) is provided on a side of the first plastic part (21) away from the shell (1); the first clip (211) is snap-fitted to an end face of the connecting piece (3) away from the shell (1); the tabs of the battery cell located in the accommodating cavity (11) can sequentially pass through the first tab through-hole (124) and the second tab through-hole (213) and be electrically connected to the connecting piece (3).

2. The battery housing assembly according to claim 1, wherein: The first plastic part (21) is recessed with a positioning groove (212), at least two of the first buckles (211) are respectively located on opposite sides of the positioning groove (212), and the connecting piece (3) is arranged in the positioning groove (212).

3. The battery housing assembly according to claim 1, wherein: At least two of the first buckles (211) are spaced apart along the first direction, and / or At least two of the first buckles (211) are spaced apart along the second direction.

4. The battery housing assembly according to claim 1, wherein: At least two second buckles (31) are spaced apart on the connecting piece (3), and the second buckles (31) are mutually engaged with the corresponding first buckles (211).

5. The battery housing assembly according to any one of claims 1 to 4, characterized in that: The plastic part (2) further includes a second plastic part (22), the second plastic part (22) being provided with a third pole lug through hole (221), the second plastic part (22) being provided on the inner side of the top wall (12), and the pole lug being capable of sequentially passing through the third pole lug through hole (221), the first pole lug through hole (124) and the second pole lug through hole (213) and being electrically connected to the connecting piece (3).

6. The battery housing assembly according to claim 5, wherein: The plastic part (2) further includes an intermediate connecting sleeve (23); the first plastic part (21), the intermediate connecting sleeve (23) and the second plastic part (22) are an integrated structure; the second tab through hole (213) of the first plastic part (21) and the third tab through hole (221) of the second plastic part (22) are connected to each other via the intermediate connecting sleeve (23).

7. The battery housing assembly according to claim 5, wherein: The battery shell assembly further includes an explosion-proof valve protective film (4), an explosion-proof valve (121) is provided on the top wall (12), the explosion-proof valve protective film (4) is covered on the explosion-proof valve (121), and a plurality of air holes (222) are provided on the second plastic part (22), and each of the air holes (222) is arranged opposite to the explosion-proof valve (121).

8. The battery housing assembly according to claim 5, wherein: A liquid injection port is provided on the top wall (12), and a liquid adding through hole (223) is provided on the second plastic part (22), wherein the liquid injection port and the liquid adding through hole (223) are arranged opposite to each other.

9. A battery module, characterized in that: It comprises a battery core and a battery shell assembly according to any one of claims 1 to 8, wherein the battery core is arranged in a shell (1) of the battery shell assembly.

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