Battery protection shell assembly and battery module

Abstract

The utility model discloses a battery protection shell assembly and a battery module, and belongs to the technical field of batteries. The battery protection shell assembly comprises a shell internally provided with a containing cavity, the interior of the containing cavity is used for installing a 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; 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 sheet is arranged on one side, away from the shell, of the first plastic part; the clamping piece is clamped on the connecting piece and the first plastic piece; and the tab of the battery cell positioned 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 can be increased.

Description

Technical Field

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

[0002] With the rapid development of various fields such as new energy vehicles, electric vehicles and power tools, battery modules used to provide stable power supply have been widely used.

[0003] In the prior art, the housing assembly of a battery module consists of a cover plate and a protective shell with an assembly opening. The battery cell is placed into the protective shell through the assembly opening, and then the cover plate is placed on the protective shell to ensure a sealed assembly. The bottom of the terminal on the cover plate is located in the protective shell, and the battery cell tab is electrically connected to the bottom of the terminal via a connecting piece.

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

[0005] Therefore, it is urgent to provide a battery protection shell assembly and a battery module to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a battery protection shell assembly and a battery module, which can improve the utilization rate of the internal space of the battery shell and help increase the energy density.

[0007] To achieve the above objectives, the following technical solutions are provided:

[0008] Battery protective shell assembly, including:

[0009] A housing is provided with an accommodating cavity therein, wherein the accommodating cavity is used to install the battery cell, and a first tab through-hole is opened on the top wall of the housing, wherein the first tab through-hole is communicated with the accommodating cavity;

[0010] A plastic part, comprising a first plastic part having a second tab through-hole, wherein the first plastic part is disposed on the outer side of the top wall, and the second tab through-hole is disposed opposite to the first tab through-hole;

[0011] a connecting piece, arranged on a side of the first plastic part away from the housing;

[0012] The clamping piece is clamped on the connecting piece and the first plastic part, and the tabs of the battery cell located in the accommodating cavity can pass through the first tab through-hole and the second tab through-hole in sequence and be electrically connected to the connecting piece.

[0013] As an optional solution for the battery protective shell assembly, the plastic part also includes a second plastic part, which is provided with a third pole ear through hole. The second plastic part is arranged on the inner side of the top wall, and the pole ear can pass through the third pole ear through hole, the first pole ear through hole and the second pole ear through hole in sequence and be electrically connected to the connecting piece.

[0014] As an optional solution for the battery protective shell assembly, the plastic part also includes an intermediate connecting sleeve, the first plastic part, the intermediate connecting sleeve and the second plastic part are an integrated structure, and the second pole ear through hole of the first plastic part and the third pole ear through hole of the second plastic part are connected to each other through the intermediate connecting sleeve.

[0015] As an optional solution for the battery protective shell assembly, a mounting groove is provided on the top wall, the first pole ear through hole passes through the bottom of the mounting groove, the first plastic part is located in the mounting groove, and the intermediate connecting sleeve is passed through the first pole ear through hole.

[0016] As an optional solution for the battery protective shell assembly, the clamping member includes a connecting portion and two first clamping portions arranged on opposite sides of the connecting portion, the connecting portion abuts against the connecting piece, and the first clamping portion passes through the second pole ear through hole and is clamped in the middle connecting sleeve.

[0017] As an optional solution for the battery protective shell assembly, the clamping member also includes a second clamping portion, and each first clamping portion is provided with the second clamping portion at one end away from the connecting portion. The connecting portion and the second clamping portion are parallel and spaced apart, and the second clamping portion is clamped on the inner side of the second plastic part.

[0018] As an optional solution for the battery protective shell assembly, the battery protective shell assembly also includes an explosion-proof valve protective film, an explosion-proof valve is provided on the top wall, the explosion-proof valve protective film cover is provided on the explosion-proof valve, and a plurality of air holes are provided on the second plastic part, each of the air holes is arranged opposite to the explosion-proof valve.

[0019] As an optional solution for the battery protective shell assembly, a liquid injection port is provided on the top wall, a liquid adding through hole is provided on the second plastic part, and the liquid injection port is arranged opposite to and connected to the liquid adding through hole.

[0020] As an optional solution for the battery protection shell assembly, a flange edge is provided on the outer edge of the first plastic part, and the flange edge abuts against the top wall, and / or

[0021] A positioning groove is provided on an end surface of the first plastic component away from the housing, and the connecting piece is arranged in the positioning groove.

[0022] The battery module comprises a battery cell and the battery protective shell assembly mentioned above, wherein the battery cell is arranged in the shell of the battery protective shell assembly.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The battery protective shell assembly provided by the present invention is provided with a first tab through-hole on the top wall of the shell, the first plastic part of the plastic part is arranged on the outside of the top wall, the connecting piece made of a conductive material is installed on the side of the first plastic part away from the shell, and the connecting piece is fixed to the first plastic part by a clamping piece, thereby ensuring the connection stability between the connecting piece and the first plastic part and reducing the difficulty of assembling the connecting piece and the first plastic part. Since the second tab through-hole of the first plastic part is arranged relative to the first tab through-hole of the shell, the tabs of the battery cell located in the accommodating cavity of the shell can pass through the first tab through-hole and the second tab through-hole in sequence and be bent to be electrically connected to the connecting piece. By arranging the connecting piece on the outside of the shell, not only the utilization rate of the internal space of the battery shell can be improved, but also the energy density of the battery can be increased.

[0025] The battery module provided by the present invention includes a battery cell and the above-mentioned battery protective shell assembly. The tabs of the battery cell located in the shell are electrically connected to the connecting piece after passing through the top wall of the shell and the first plastic part and being bent. This not only improves the utilization rate of the internal space of the battery shell, but also helps to increase the energy density of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the assembly of the battery protection shell assembly from a first perspective in an embodiment of the present invention;

[0028] Figure 2 This is an exploded schematic diagram of a battery protective shell assembly in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0030] Figure 4 This is a schematic diagram of the assembly of the battery protection shell assembly from a second perspective in an embodiment of the present invention;

[0031] Figure 5This is a schematic diagram of an explosion of a plastic part in an embodiment of the present utility model;

[0032] Figure 6 This is a schematic structural diagram of the clamping member in an embodiment of the present utility model;

[0033] Figure 7 This is a cross-sectional view of a battery protection shell assembly in an embodiment of the present invention;

[0034] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0035] Figure 9 for Figure 7 A partial enlarged view of point C in the middle;

[0036] Figure 10 for Figure 7 Cross-sectional view along the DD direction.

[0037] Reference numerals:

[0038] 1. Shell; 2. Plastic parts; 3. Connecting piece; 4. Clamping piece; 5. Explosion-proof valve protective film;

[0039] 11. Accommodation chamber; 12. Top wall; 121. First tab through hole; 122. Mounting groove; 123. Explosion-proof valve; 124. Liquid filling port;

[0040] 21. First plastic part; 211. Second tab through hole; 212. Positioning groove; 213. Flange edge; 22. Second plastic part; 221. Third tab through hole; 222. Air hole; 223. Liquid adding through hole; 23. Intermediate connecting sleeve; 41. Connecting part; 42. First clamping part; 43. Second clamping part. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0042] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0043] It should also be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0044] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0045] In order to improve the utilization of the internal space of the battery shell and increase the energy density, this embodiment provides a battery protective shell assembly and a battery module. Figures 1 to 10 The specific contents of this embodiment are described in detail.

[0046] The battery protective case assembly in this embodiment includes a housing 1, a plastic component 2, a connecting piece 3, and a clamping member 4. The housing 1 defines a housing cavity 11 for mounting a battery cell. The top wall 12 of the housing 1 defines a first tab through-hole 121, which communicates with the housing cavity 11. The plastic component 2 includes a first plastic component 21 having a second tab through-hole 211. The first plastic component 21 is disposed on the outer side of the top wall 12, with the second tab through-hole 211 positioned opposite the first tab through-hole 121. The connecting piece 3 is disposed on the side of the first plastic component 21 facing away from the housing 1. The clamping member 4 is clamped between the connecting piece 3 and the first plastic component 21. The tabs of the battery cell within the housing cavity 11 can sequentially pass through the first and second tab through-holes 121, 211, and electrically connect to the connecting piece 3. For example, the material of the clamping member 4 may include, but is not limited to, epoxy resin sheet, metal, plastic (such as PP, PET, or PE), or a combination thereof. The clamping member 4 can be of uniform or unequal thickness, with a thickness of 0.1 mm to 2 mm (too small is difficult to process, too large is more expensive). The number of clamping members 4 on the positive electrode side and the number of clamping members 4 on the negative electrode side is ≥1.

[0047] In short, the battery protective shell assembly provided by the present invention has a first tab through-hole 121 provided on the top wall 12 of the shell 1, the first plastic part 21 of the plastic part 2 is disposed on the outside of the top wall 12, a connecting piece 3 made of a conductive material is mounted on the side of the first plastic part 21 away from the shell 1, and the connecting piece 3 is fixed to the first plastic part 21 by a clamping member 4, thereby ensuring the stability of the connection between the connecting piece 3 and the first plastic part 21 and reducing the difficulty of assembling the connecting piece 3 and the first plastic part 21. Because the second tab through-hole 211 of the first plastic part 21 is disposed opposite the first tab through-hole 121 of the shell 1, the tabs of the battery cell located in the accommodating cavity 11 of the shell 1 can pass through the first tab through-hole 121 and the second tab through-hole 211 in sequence and be bent to be electrically connected to the connecting piece 3. By disposing the connecting piece 3 on the outside of the shell 1, not only can the utilization rate of the internal space of the battery shell 1 be improved, but it also helps to increase the energy density of the battery.

[0048] Furthermore, the plastic component 2 includes a second plastic component 22, which is provided with a third tab through-hole 221. The second plastic component 22 is disposed on the inner side of the top wall 12. The tab can sequentially pass through the third tab through-hole 221, the first tab through-hole 121, and the second tab through-hole 211 to electrically connect to the connecting piece 3. In this embodiment, the first and second plastic components 21 and 22 may be separate components. By installing the second plastic component 22 between the battery cell and the top wall 12 of the housing 1, the battery cell and the housing 1 are isolated from direct contact, thereby preventing the risk of electrical conduction of the housing 1. The fixing strap also passes around the third tab through-hole 221, the first tab through-hole 121, and the second tab through-hole 211.

[0049] In some application scenarios, the first plastic part 21 and the second plastic part 22 of the plastic part 2 in this embodiment can also be integrated. The plastic part 2 also includes an intermediate connecting sleeve 23. The first plastic part 21, the intermediate connecting sleeve 23, and the second plastic part 22 form an integrated structure. The second tab through-hole 211 of the first plastic part 21 and the third tab through-hole 221 of the second plastic part 22 are interconnected through the intermediate connecting sleeve 23. The intermediate connecting sleeve 23 is located within the first tab through-hole 121. The tabs of the battery cell pass through the third tab through-hole 221, the intermediate connecting sleeve 23, and the second tab through-hole 211 in sequence, and are bent to be electrically connected to the connecting piece 3. The clamping member 4 is clamped between the connecting piece 3 and the plastic part 2.

[0050] Furthermore, a mounting groove 122 is provided on the top wall 12, a first tab through-hole 121 extends through the bottom of the mounting groove 122, the first plastic part 21 is located in the mounting groove 122, and the intermediate connecting sleeve 23 is passed through the first tab through-hole 121. The addition of the mounting groove 122 facilitates the accommodation of the first plastic part 21 on the outside of the top wall 12 of the housing 1.

[0051] Illustratively, the clamping member 4 includes a connecting portion 41 and two first clamping portions 42 disposed on opposite sides of the connecting portion 41. The connecting portion 41 abuts against the connecting piece 3. The first clamping portions 42 pass through the second tab through-hole 211 and are clamped within the intermediate connecting sleeve 23. The two first clamping portions 42 are clamped within the intermediate connecting sleeve 23, so that the connecting portion 41 abuts against the connecting piece 3, thereby preventing the connecting piece 3 from falling off the first plastic component 21.

[0052] Furthermore, the clamping member 4 also includes a second clamping portion 43. Each first clamping portion 42 is provided with a second clamping portion 43 at one end away from the connecting portion 41. The connecting portion 41 and the second clamping portion 43 are arranged parallel to and spaced apart from each other. The second clamping portion 43 is clamped to the inner side of the second plastic part 22. The addition of the second clamping portion 43 allows the second clamping portion 43 to tightly abut the inner wall of the second plastic part 22, further improving the clamping force of the clamping member 4 on the connecting piece 3 and ensuring that the clamping member 4 does not fall off the plastic part 2.

[0053] Furthermore, the battery protective shell assembly also includes an explosion-proof valve protective film 5, an explosion-proof valve 123 is provided on the top wall 12, the explosion-proof valve protective film 5 is covered on the explosion-proof valve 123, and a plurality of air holes 222 are provided on the second plastic part 22, each of which is arranged opposite to the explosion-proof valve 123. By adding the explosion-proof valve 123 and the explosion-proof valve protective film 5, when high-pressure gas is generated in the shell 1 of the battery module due to a fault, the high-pressure gas is quickly discharged. Optionally, the notch on the explosion-proof valve 123 can be facing the inside of the shell 1 or the outside of the shell 1. By providing multiple air holes 222 on the second plastic part 22, the discharge of high-pressure gas is facilitated, and the problem of the explosion-proof valve 123 not being able to work due to the addition of the second plastic part 22 will not be caused.

[0054] Furthermore, a liquid injection port 124 is provided on the top wall 12, and a liquid filling through-hole 223 is provided on the second plastic part 22. The liquid injection port 124 is arranged opposite to and connected to the liquid filling through-hole 223. By adding the liquid injection port 124, it is convenient to add electrolyte to the battery protective shell assembly. The electrolyte can transfer ions between the positive and negative poles of the battery, thereby ensuring that the battery can operate normally. Optionally, the liquid injection port 124 can be provided near the positive pole side of the shell 1, or near the negative pole side of the shell 1, or between the positive and negative poles, without making too many restrictions here.

[0055] Furthermore, a flange 213 is provided on the circumference of the outer edge of the first plastic part 21, and the flange 213 abuts against the top wall 12, and / or a positioning groove 212 is provided on the end face of the first plastic part 21 away from the shell 1, and the connecting piece 3 is provided in the positioning groove 212. By adding the flange 213, the contact area between the first plastic part 21 and the shell 1 can be further increased. Exemplarily, the width L2 of the flange 213 is 1mm-10mm. By adding the positioning groove 212, it is used to limit the position of the connecting piece 3 on the first plastic part 21 to prevent the connecting piece 3 from falling off. 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 means exceeding the surface of the shell 11).

[0056] This embodiment also provides a battery module, which includes a battery cell and the battery protective shell assembly mentioned above. The battery cell is disposed within the battery protective shell assembly's housing 1. The tabs of the battery cell within the housing 1 pass through the top wall 12 of the housing 1 and the first plastic part 21, and are then bent and electrically connected to the connecting piece 3. This not only improves the utilization of the internal space of the battery housing 1 but also helps increase the energy density of the battery module.

[0057] Note that 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 protective shell 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 (121) is provided on a top wall (12) of the housing (1), wherein the first tab through-hole (121) is in communication with the housing cavity (11); A plastic part (2) comprising a first plastic part (21) having a second tab through hole (211), wherein the first plastic part (21) is arranged on the outside of the top wall (12), and the second tab through hole (211) is arranged opposite to the first tab through hole (121); A connecting piece (3) is arranged on a side of the first plastic part (21) away from the housing (1); A clamping member (4) is clamped on the connecting piece (3) and the first plastic part (21), and the tabs of the battery cell located in the accommodating cavity (11) can pass through the first tab through-hole (121) and the second tab through-hole (211) in sequence and be electrically connected to the connecting piece (3).

2. The battery protective shell assembly according to claim 1, 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 arranged on the inner side of the top wall (12), and the pole lug being able to sequentially pass through the third pole lug through hole (221), the first pole lug through hole (121) and the second pole lug through hole (211) and be electrically connected to the connecting piece (3).

3. The battery protective shell assembly according to claim 2, characterized in that: 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) form an integrated structure; the second tab through hole (211) 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).

4. The battery protective shell assembly according to claim 3, characterized in that: The top wall (12) is provided with a mounting groove (122), the first tab through hole (121) passes through the bottom of the mounting groove (122), the first plastic part (21) is located in the mounting groove (122), and the intermediate connecting sleeve (23) is passed through the first tab through hole (121).

5. The battery protective shell assembly according to claim 3, characterized in that: The clamping member (4) comprises a connecting portion (41) and two first clamping portions (42) arranged on opposite sides of the connecting portion (41); the connecting portion (41) abuts against the connecting sheet (3); and the first clamping portions (42) pass through the second tab through hole (211) and are clamped in the intermediate connecting sleeve (23).

6. The battery protective shell assembly according to claim 5, characterized in that: The clamping member (4) further comprises a second clamping portion (43), and each first clamping portion (42) is provided with the second clamping portion (43) at one end away from the connecting portion (41), the connecting portion (41) and the second clamping portion (43) are parallel and spaced apart, and the second clamping portion (43) is clamped on the inner side of the second plastic part (22).

7. The battery protective shell assembly according to claim 2, characterized in that: The battery protection shell assembly further includes an explosion-proof valve protective film (5), an explosion-proof valve (123) is provided on the top wall (12), the explosion-proof valve protective film (5) is covered on the explosion-proof valve (123), 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 (123).

8. The battery protective shell assembly according to claim 2, wherein: The top wall (12) is provided with a liquid injection port (124), and the second plastic part (22) is provided with a liquid adding through hole (223). The liquid injection port (124) and the liquid adding through hole (223) are arranged opposite to each other and are in communication.

9. The battery protective shell assembly according to any one of claims 1 to 8, characterized in that: A flange edge (213) is provided on the circumference of the outer edge of the first plastic part (21), and the flange edge (213) abuts against the top wall (12), and / or A positioning groove (212) is provided on an end surface of the first plastic part (21) away from the housing (1), and the connecting piece (3) is arranged in the positioning groove (212).

10. A battery module, characterized in that: The invention comprises a battery cell and a battery protective shell assembly according to any one of claims 1 to 9, wherein the battery cell is arranged in a shell (1) of the battery protective shell assembly.

Images