Battery module and battery pack

Abstract

The utility model provides a battery module and battery pack, wherein the battery module comprises an end plate and an upper cover, the end plate is provided with an abutting surface and a hoisting surface which are oppositely arranged, the top surface of the end plate is integrally formed with an output pole base, the top surface of the output pole base is provided with two first bosses which are arranged at an interval, and the upper cover is provided with a plurality of second bosses; a second boss is arranged on the side face, close to the hoisting face, of the output pole base, a first clamping part is arranged on the first boss, and a second clamping part is arranged on the second boss; the upper cover covers the end plate, the upper cover is provided with first clamping arms in one-to-one correspondence with the two first bosses, the first clamping arms are configured to be clamped and matched with the corresponding first clamping parts, the upper cover is further provided with second clamping arms, and the second clamping arms are configured to be clamped and matched with the second clamping parts. According to the battery module disclosed by the utility model, the connection strength between the output electrode base and the end plate is ensured, the connection strength between the output electrode base and the upper cover is improved, and the risk of insulation protection failure is reduced.

Description

Technical Field

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

[0002] The battery module is the most important component of the energy storage battery. The battery module currently used usually includes a plurality of stacked single cells, end plates installed at both ends of the plurality of stacked single cells, and fixing belts that bind the plurality of stacked single cells and the end plates together. An output pole base for connecting the output pole connecting piece is usually installed on the end plate, and an upper cover is connected to the output pole base. The output pole base and the upper cover cooperate to provide insulation protection for the output pole connecting piece. However, the existing output pole base will be unstable after installation, and the output pole base is easily separated from the end plate, and / or the output pole base is separated from the upper cover, resulting in the failure of insulation protection. Utility Model Content

[0003] One object of the utility model is to provide a battery module which can ensure the connection strength between the output pole base and the end plate and improve the connection strength between the output pole base and the upper cover.

[0004] Another object of the present invention is to provide a battery pack containing the above-mentioned battery module.

[0005] In order to achieve the above object, the utility model provides a battery module, which includes:

[0006] An end plate having an abutment surface and a lifting surface arranged opposite to each other, an output pole base being integrally formed on the top surface of the end plate, two first bosses arranged at intervals being arranged on the top surface of the output pole base, a second boss being arranged on the side surface of the output pole base adjacent to the lifting surface, the second boss being located between the two first bosses, a first clamping portion being arranged on the first boss, and a second clamping portion being arranged on the second boss;

[0007] An upper cover is mounted on the end plate, and is provided with first clamping arms corresponding to the two first bosses one by one, and the first clamping arms are configured to be clamped and matched with the corresponding first clamping parts. The upper cover is also provided with a second clamping arm, and the second clamping arm is configured to be clamped and matched with the second clamping part.

[0008] In the battery module as described above, the first clamping portion is a clamping hole provided on the first boss, and the first clamping arm is provided with a buckle that is clamped and matched with the clamping hole.

[0009] In the battery module as described above, the second clamping portion is a clamping groove arranged on the bottom surface of the second boss, and the second clamping arm is provided with a clamping hook that is clamped and matched with the clamping groove.

[0010] In the battery module as described above, the top surface of the output pole base is rectangular, and the two first bosses are respectively arranged at two ends of the output pole base.

[0011] In the battery module as described above, the first clamping portion is disposed at an end of the first boss adjacent to the abutting surface.

[0012] In the battery module as described above, the second boss is provided with at least two second clamping portions arranged at intervals, and the upper cover is provided with at least two second clamping arms arranged at intervals.

[0013] The battery module as described above, wherein the hoisting surface is provided with a plurality of heat dissipation grooves arranged at intervals.

[0014] The battery module as described above, wherein the lifting surface is provided with a lifting hole.

[0015] In the battery module as described above, the end plate is an end plate made of a non-metallic composite material.

[0016] In the battery module as described above, the upper cover is made of a non-metallic composite material.

[0017] The utility model also provides a battery pack, which includes the above-mentioned battery module.

[0018] Compared with the prior art, the above technical solution has the following advantages:

[0019] The battery module of the utility model effectively ensures the reliability of the connection between the output pole base and the end plate by integrally forming the output pole base on the end plate, and forms three connections between the upper cover and the output pole base through the clamping cooperation between the first clamping arm and the first boss, and the clamping cooperation between the second clamping arm and the second boss, which effectively improves the connection strength between the upper cover and the output pole base, thereby improving the stability of the installation space, and further greatly reducing the risk of failure of insulation protection of the installation space;

[0020] The battery module of the utility model, the end plate and the upper cover are all made of non-metal composite materials, which have good insulation performance and pressure resistance performance. Compared with metal materials, non-metal composite materials are lighter, cheaper, and easier to process and manufacture.

[0021] The battery pack of the utility model includes the above-mentioned battery module, so the battery pack has all the advantages of the above-mentioned battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the battery module of the utility model;

[0024] Figure 2 yes Figure 1 A schematic diagram of the side structure of the battery module shown;

[0025] Figure 3 yes Figure 1 The schematic diagram of the exploded structure of the battery module shown;

[0026] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the end plate in the battery module shown;

[0027] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of the upper cover in the battery module is shown.

[0028] Description of Figure Numbers:

[0029] 10. End plate;

[0030] 101, abutment surface;

[0031] 102, hoisting surface; 1021, heat dissipation groove; 1022, hoisting hole;

[0032] 11. Output pole base;

[0033] 111, first boss; 1111, first clamping portion;

[0034] 112, second boss; 1121, second clamping portion;

[0035] 113, mounting hole; 1131, rivet nut;

[0036] 12. Install through holes;

[0037] 13. Steel belt positioning groove;

[0038] 20. Upper cover;

[0039] 21. First clamping arm;

[0040] 22. second clamping arm; 221. clamping hook;

[0041] 30. Output pole connecting piece. DETAILED DESCRIPTION

[0042] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0043] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0044] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, the utility model provides a battery module, which includes an end plate 10 and an upper cover 20, wherein:

[0046] The end plate 10 has an abutting surface 101 and a lifting surface 102 which are arranged opposite to each other. The abutting surface 101 is used to abut against the stacked single cells. The top surface of the end plate 10 is integrally formed with an output pole base 11. The number of output pole bases 11 can be set according to actual use needs. For example, Figure 1 In the battery module shown, the top surface of the end plate 10 is integrally formed with two output pole bases 11 arranged at intervals, and a wiring harness connection fixing base is provided between the two output pole bases 11. The top surface of the output pole base 11 is provided with two first bosses 111 arranged at intervals, and the first boss 111 extends vertically upward. A second boss 112 is provided on the side of the output pole base 11 adjacent to the lifting surface 102, and the second boss 112 is located between the first bosses 111, that is, the projections of the first boss 111 and the second boss 112 on the top surface of the end plate 10 are not parallel, so that three eccentric connections can be formed between the output pole base 11 and the upper cover 20, thereby improving the reliability of the connection. For example, in Figure 1 In the battery module shown, the width of the output pole base 11 is equal to the width of the end plate 10, and the second boss 112 protrudes from the lifting surface 102 to facilitate matching with the upper cover 20. Preferably, the first boss 111, the second boss 112 and the output pole base 11 are an integral structure of injection molding to ensure the reliability of the connection between the output pole base 11 and the first boss 111 and the second boss 112. The first boss 111 is provided with a first clamping portion 1111, and the second boss 112 is provided with a second clamping portion 1121;

[0047] The upper cover 20 is mounted on the end plate 10. The upper cover 20 and the output pole base 11 can be enclosed to form an installation space. The output pole connecting piece 30 is connected to the installation space. The installation space can provide insulation protection for the output pole connecting piece 30. Specifically, a mounting hole 113 is provided on the top surface of the output pole base 11. The two first bosses 111 are respectively located on both sides of the mounting hole 113. A rivet nut 1131 for connecting the output pole connecting piece 30 is pre-embedded in the mounting hole 113; the upper cover 20 is provided with a first clamping arm 21 corresponding to the two first bosses 111 one by one, that is, a first clamping arm 21 is respectively provided on the side surfaces of the upper cover 20 corresponding to the two first bosses 111, and the first clamping arm 21 extends vertically downward. The first clamping arm 21 is configured to be clamped and matched with the corresponding first clamping portion 1111 A second clamping arm 22 is also provided on the upper cover 20. The second clamping arm 22 is located on the side of the upper cover 20 corresponding to the second boss 112. The second clamping arm 22 also extends vertically downward. The second clamping arm 22 is configured to be clamped with the second clamping portion 1121. Preferably, the first clamping arm 21, the second clamping arm 22 and the upper cover 20 are an integral structure of injection molding to ensure the reliability of the connection between the upper cover 20 and the first clamping arm 21 and the second clamping arm 22. Through the clamping cooperation of the first clamping arm 21 and the first boss 111, and the clamping cooperation of the second clamping arm 22 and the second boss 112, three connections are formed between the upper cover 20 and the output pole base 11, which effectively limits the relative movement of the upper cover 20 relative to the output pole base 11, thereby improving the connection strength between the upper cover 20 and the output pole base 11.

[0048] The battery module of the present invention effectively ensures the reliability of the connection between the output pole base 11 and the end plate 10 by integrally forming the output pole base 11 on the end plate 10, and forms three connections between the upper cover 20 and the output pole base 11 through the snap-fitting of the first snap-fit ​​arm 21 and the first boss 111, and the snap-fitting of the second snap-fit ​​arm 22 and the second boss 112, thereby effectively improving the connection strength between the upper cover 20 and the output pole base 11, thereby improving the stability of the installation space, and further greatly reducing the risk of failure of insulation protection of the installation space.

[0049] In one embodiment of the present invention, Figure 3 , Figure 4 and Figure 5 As shown, the first clamping portion 1111 is a clamping hole set on the first boss 111, and the first clamping arm 21 is provided with a buckle that is engaged with the clamping hole. During installation, the buckle is inserted into the clamping hole to complete the connection between the first clamping arm 21 and the first clamping portion 1111. This connection method can limit the rotation of the upper cover 20 relative to the output pole base 11, and limit the movement of the upper cover 20 in the vertical direction relative to the output pole base 11.

[0050] In one embodiment of the utility model, the second clamping portion 1121 is a clamping groove arranged on the bottom surface of the second boss 112, and the second clamping arm 22 is provided with a clamping hook 221 that is engaged with the clamping groove. During installation, the clamping hook 221 is inserted into the clamping groove to complete the connection between the second clamping arm 22 and the second clamping portion 1121. This connection method can further limit the vertical movement of the upper cover 20 relative to the output pole base 11, and limit the movement of the upper cover 20 relative to the output pole base 11 along the length direction of the end plate 10, and strengthen the connection strength between the upper cover 20 and the output pole base 11.

[0051] Of course, the first clamping portion 1111 can also be a clamping slot set on the first boss 111, and the first clamping arm 21 is provided with a clamping hook that is engaged with the clamping slot. The second clamping portion 1121 can also be a clamping hole set on the second boss 112, and the second clamping arm 22 is provided with a clamping buckle that is engaged with the clamping hole.

[0052] Alternatively, the first clamping portion 1111 and the second clamping portion 1121 are both clamping holes, and the first clamping arm 21 and the second clamping arm 22 are both provided with buckles that match the corresponding clamping holes.

[0053] Alternatively, the first clamping portion 1111 and the second clamping portion 1121 are both clamping slots, and the first clamping arm 21 and the second clamping arm 22 are both provided with clamping hooks that match the corresponding clamping slots.

[0054] In one embodiment of the present invention, Figure 1 , Figure 3 and Figure 4 As shown, the top surface of the output pole base 11 is rectangular, and the two first bosses 111 are respectively arranged at the two ends of the output pole base 11, that is, the top surface of the output pole base 11 includes two oppositely arranged long sides and two oppositely arranged short sides, the two first bosses 111 are respectively arranged at the two short sides, and the second boss 112 is arranged on the side of the long side adjacent to the lifting surface 102. Such a structure can maximize the installation space and facilitate the installation of the output pole connecting plate 30.

[0055] Further, if Figure 4 As shown, the first clamping portion 1111 is arranged at one end of the adjacent abutting surface 101 of the first boss 111, so that the vertical distance between the first clamping portion 1111 and the second clamping portion 1121 is maximized, thereby increasing the connection area between the output pole base 11 and the upper cover 20, and further increasing the connection strength between the output pole base 11 and the upper cover 20.

[0056] Going further, Figure 5As shown, at least two second clamping portions 1121 arranged at intervals are provided on the second boss 112, and at least two second clamping arms 22 arranged at intervals are provided on the upper cover 20. Preferably, the number of the second clamping portions 1121 and the second clamping arms 22 are equal, and each second clamping portion 1121 is arranged one-to-one with each second clamping arm 22, that is, along the length direction of the output pole base 11, the output pole base 11 and the upper cover 20 are connected by at least two clamping structures, which further increases the connection strength between the output pole base 11 and the upper cover 20.

[0057] In one embodiment of the present invention, Figure 4 As shown, a plurality of heat dissipation grooves 1021 are arranged at intervals on the lifting surface 102 to improve the heat dissipation effect of the end plate 10, and reinforcing ribs are formed on the groove walls between two adjacent heat dissipation grooves 1021, which can ensure the use strength of the end plate 10 and will not be twisted or deformed.

[0058] Furthermore, a hoisting hole 1022 is provided on the hoisting surface 102 to facilitate the connection of a tooling positioning fixture with the end plate 10 for hoisting operations.

[0059] Furthermore, the end plate 10 also has two relatively arranged connecting surfaces. The abutting surface 101, the lifting surface 102 and the two connecting surfaces together form the outer peripheral surface of the end plate 10. A mounting through hole 12 for fixing the end plate 10 is provided at the top of the end plate 10 adjacent to the connecting surface. A steel belt positioning groove 13 for installing a positioning steel belt is provided on the connecting surface. The number of heat dissipation grooves 1021 corresponding to the steel belt coverage area on the lifting surface 102 is denser, so that the number of reinforcing ribs is increased, which plays a role of local reinforcement to prevent the end plate 10 from twisting and deforming under the force exerted by the steel belt.

[0060] In one embodiment of the utility model, the end plate 10 is an end plate 10 made of a non-metallic composite material. Specifically, the non-metallic composite material is at least one of glass fiber reinforced epoxy resin, glass fiber reinforced polyester, carbon fiber reinforced epoxy resin, carbon fiber reinforced polyester and polyadiohexylenediamine (Nylon-66, Polyamide-66, PA66, Polyadiohexylenediamine Nylon-66). The non-metallic composite material has good insulation and pressure resistance properties. Compared with the end plate 10 made of metal material, the end plate 10 made of non-metallic composite material is lighter and has lower cost.

[0061] The upper cover 20 is an upper cover 20 made of a non-metallic composite material. Similarly, the non-metallic composite material is at least one of glass fiber reinforced epoxy resin, glass fiber reinforced polyester, carbon fiber reinforced epoxy resin, carbon fiber reinforced polyester and polyhexamethylene adipamide. That is, the upper cover 20 and the output pole base 11 are made of the same material to make the processing and manufacturing of the battery module simpler and more convenient.

[0062] The utility model also provides a battery pack, which includes the above-mentioned battery module.

[0063] In summary, the battery module of the utility model effectively ensures the reliability of the connection between the output pole base and the end plate by integrally forming the output pole base on the end plate, and forms three connections between the upper cover and the output pole base through the clamping fit of the first clamping arm and the first boss, and the clamping fit of the second clamping arm and the second boss, which effectively improves the connection strength between the upper cover and the output pole base, thereby improving the stability of the installation space, and further greatly reducing the risk of failure of insulation protection of the installation space;

[0064] The battery module of the utility model, the end plate and the upper cover are all made of non-metal composite materials, which have good insulation performance and pressure resistance performance. Compared with metal materials, non-metal composite materials are lighter, cheaper, and easier to process and manufacture.

[0065] The battery pack of the utility model includes the above-mentioned battery module, so the battery pack has all the advantages of the above-mentioned battery module.

[0066] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate positions or positional relationships based on the working state of the present application, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0067] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] The present application has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, various replacements and improvements may be made to the present application, all of which fall within the scope of protection of the present application.

Claims

1. A battery module, characterized in that: The battery module comprises: An end plate having an abutment surface and a lifting surface arranged opposite to each other, an output pole base being integrally formed on the top surface of the end plate, two first bosses arranged at intervals being arranged on the top surface of the output pole base, a second boss being arranged on the side surface of the output pole base adjacent to the lifting surface, the second boss being located between the two first bosses, a first clamping portion being arranged on the first boss, and a second clamping portion being arranged on the second boss; An upper cover is mounted on the end plate, and is provided with first clamping arms corresponding to the two first bosses one by one, and the first clamping arms are configured to be clamped and matched with the corresponding first clamping parts. The upper cover is also provided with a second clamping arm, and the second clamping arm is configured to be clamped and matched with the second clamping part.

2. The battery module according to claim 1, characterized in that: The first clamping portion is a clamping hole arranged on the first boss, and the first clamping arm is provided with a buckle that is clamped and matched with the clamping hole.

3. The battery module according to claim 1, characterized in that: The second clamping portion is a clamping groove arranged on the bottom surface of the second boss, and the second clamping arm is provided with a clamping hook that is clamped and matched with the clamping groove.

4. The battery module according to claim 1, characterized in that: The top surface of the output pole base is rectangular, and the two first bosses are respectively arranged at two ends of the output pole base.

5. The battery module according to claim 4, characterized in that: The first clamping portion is disposed at one end of the first boss adjacent to the abutting surface.

6. The battery module according to claim 4, characterized in that: At least two second clamping parts arranged at intervals are arranged on the second boss, and at least two second clamping arms arranged at intervals are arranged on the upper cover.

7. The battery module according to claim 1, characterized in that: The hoisting surface is provided with a plurality of heat dissipation grooves arranged at intervals.

8. The battery module according to claim 7, characterized in that: The lifting surface is provided with lifting holes.

9. The battery module according to any one of claims 1 to 8, characterized in that: The end plate is made of a non-metal composite material.

10. The battery module according to claim 9, characterized in that: The upper cover is made of a non-metallic composite material.

11. A battery pack, characterized in that: The battery pack comprises the battery module according to any one of claims 1 to 10.

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