Battery module

Abstract

A battery module, comprising: battery cells, a non-metallic case having an accommodating cavity, a plastic partition plate, and a first fastening mechanism, wherein the plastic partition plate is arranged in the accommodating cavity and divides the accommodating cavity into a plurality of battery compartments; the plastic partition plate is detachably fixed on an inner wall of the accommodating cavity via the first fastening mechanism; and each battery compartment has a battery cell arranged therein.

Description

Battery module

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202422281684.9, filed on September 18, 2024, and entitled "A battery module", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the technical field of battery modules, and more specifically, relates to a battery module. BACKGROUND

[0004] The battery pack is the core energy source of new energy vehicles, providing driving power for the whole vehicle. It mainly constitutes the battery pack main body through the shell envelope. The battery pack mainly includes battery cells, a shell, and an electrical system. The battery pack shell, referred to as the battery shell, is the carrier of the battery module, and plays a key role in the safety and protection of the battery. In the design, the material, surface corrosion resistance, insulation treatment, strength and rigidity, etc. are considered for the service life of the battery in the later period and the shell collision prevention. The traditional new energy battery shell end plate and side plate material adopts steel material, which can cause poor welding reliability between the end plate and the side plate, poor connection reliability between the side plate and the battery cell, and high cost. SUMMARY

[0005] The present application aims to provide a battery module to solve the technical problem that it is difficult to weld when the aluminum alloy battery shell is spliced in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is to provide a battery module, comprising: a plurality of battery cells, a non-metallic shell having a containing cavity, a plastic partition plate, and a first fastening mechanism; the plastic partition plate is arranged in the containing cavity and divides the containing cavity into a plurality of battery compartments; the plastic partition plate is detachably connected to the inner wall of the containing cavity through the first fastening mechanism; at least one of the plurality of battery cells is arranged in each of the plurality of battery compartments.

[0007] Further, the outer side wall of the plastic partition plate is recessed to form a groove; the groove is filled with glue, and the plastic partition plate and the plurality of battery cells are bonded by the glue.

[0008] Further, a first bonding layer for bonding the plurality of battery cells in the plurality of battery compartments is arranged on the outer side wall of the plastic partition plate.

[0009] Further, a first reinforcing rib is arranged on the second outer surface of the plastic partition plate.

[0010] Further, the battery module further comprises a second fastening mechanism; the non-metallic shell comprises a first side plate, a first end plate, a second side plate, and a second end plate; the first side plate, the first end plate, the second side plate, and the second end plate are sequentially fixedly connected in a head-tail manner through the second fastening mechanism and enclose the accommodating cavity.

[0011] Further, one end of the plastic partition plate has a first bent edge and / or a first protrusion fixed on the inner wall of the first end plate, and the other end of the plastic partition plate has a second bent edge and / or a second protrusion fixed on the inner wall of the second end plate.

[0012] Further, the second fastening mechanism is a first screw; the first side plate, the first end plate, the second side plate, and the second end plate are sequentially fixedly connected in a head-tail manner through the first screw.

[0013] Further, the first side plate is located between the first support and the second support, and the second side plate is located between the first support and the second support.

[0014] Further, the first support is in the form of a plate body perpendicular to the first side plate; the second support is in the form of a plate body perpendicular to the second side plate; the structure formed by the first support and the first side plate is in the form of L or T, and the structure formed by the second support and the second side plate is in the form of L or T.

[0015] Further, the surface of the first support is provided with a plurality of second reinforcing ribs arranged in a crisscross manner; the surface of the second support is provided with a plurality of third reinforcing ribs arranged in a crisscross manner.

[0016] Further, the outer surface of the first end plate is provided with a plurality of fourth reinforcing ribs arranged in a crisscross manner, the plurality of fourth reinforcing ribs are crisscrossed to form a first intersection part, and a first screw hole is formed in the first intersection part; the outer surface of the second end plate is provided with a plurality of fifth reinforcing ribs arranged in a crisscross manner, the plurality of fifth reinforcing ribs are crisscrossed to form a second intersection part, and a second screw hole is formed in the second intersection part.

[0017] The first fastening mechanism comprises a second screw and a third screw; the second screw passes through the first screw hole and fixedly connects the plastic partition plate and the first end plate; the third screw passes through the second screw hole and fixedly connects the plastic partition plate and the second end plate.

[0018] Further, the first intersection part is in a cylindrical shape; the first screw hole extends along the axial direction of the first intersection part, and the diameter of the first intersection part is greater than the width of each of the plurality of fourth reinforcing ribs.

[0019] Further, the second intersection part is in a cylindrical shape; the second screw hole extends along the axial direction of the second intersection part, and the diameter of the second intersection part is greater than the width of each of the plurality of fifth reinforcing ribs.

[0020] Further, the inner wall of the accommodating cavity is provided with a plurality of second adhesive layers for adhering the plurality of battery cells in the plurality of battery compartments.

[0021] Further, the plurality of second adhesive layers are UV glue; and the first adhesive layer is structural glue.

[0022] The battery module provided by the application has the following beneficial effects: compared with the prior art, the battery module provided by the application has a non-metallic shell with an accommodating cavity; a plastic partition plate is arranged in the accommodating cavity, and the plastic partition plate divides the accommodating cavity into a plurality of battery compartments for storing battery cells, and the battery cells can be arranged in the battery compartments; the plastic partition plate and the inner wall of the accommodating cavity are fixedly connected in a detachable manner through a first fastening mechanism, so that the plastic partition plate and the non-metallic shell can be fixed or separated; when a user detaches the plastic partition plate, the plastic partition plate can be detached and separated from the non-metallic shell, which is very convenient; in addition, the non-metallic shell is made of non-metal, and the non-metal has good heat insulation and insulation effects; the plastic partition plate is made of plastic; the plastic material is easy to be adhered by glue, so that the battery cells can be adhered to the plastic partition plate or the non-metallic shell, and the plastic has good heat insulation and insulation effects. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Fig. 1 is an exploded perspective view of the battery module provided by the application;

[0025] Fig. 2 is a perspective view of the battery module provided by the application;

[0026] Fig. 3 is an enlarged view of A in Fig. 2;

[0027] Fig. 4 is a perspective view of the battery module provided by the application;

[0028] Fig. 5 is a top view of the battery module provided by the application;

[0029] Fig. 6 is an assembled view of the first side plate and the first support according to an embodiment of the present application;

[0030] Fig. 7 is an assembled view of the second side plate and the second support according to an embodiment of the present application;

[0031] Fig. 8 is a front view of the first end plate according to an embodiment of the present application;

[0032] Fig. 9 is a front view of the second end plate according to an embodiment of the present application.

[0033] In the drawings: 1 - non-metallic shell; 11 - first side plate; 12 - second side plate; 13 - first end plate; 131 - fourth reinforcing rib; 1311 - first intersection; 132 - first screw hole; 14 - second end plate; 141 - fifth reinforcing rib; 1411 - second intersection; 142 - second screw hole; 15 - accommodating cavity; 151 - battery compartment; 16 - first fastening mechanism; 17 - second fastening mechanism; 2 - plastic partition plate; 21 - groove; 22 - second bent edge; 23 - second protrusion; 24 - first bent edge; 251 - first outer surface; 252 - second outer surface; 26 - first reinforcing rib; 27 - outer side wall; 28 - first protrusion; 31 - first support; 311 - second reinforcing rib; 32 - second support; 321 - third reinforcing rib; 41 - second adhesive layer; 42 - first adhesive layer; 5 - battery cell; 6 - cover plate. DETAILED DESCRIPTION

[0034] In order to make the technical problems solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be noted that in the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B; "and / or" herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. Wherein, A, B can be singular or plural.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate directions or positions based on the directions or positions shown in the drawings and are used for convenience in describing the present application and simplifying the description, and thus cannot be construed as indicating or implying that a device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0039] Please refer to FIGS. 1-8, the battery module provided by the present application will be described. The battery module comprises: a plurality of battery cells 5, a non-metallic shell 1 having a receiving cavity 15, a plastic partition plate 2, and a first fastening mechanism 16; the plastic partition plate 2 is arranged in the receiving cavity 15 and divides the receiving cavity 15 into a plurality of battery compartments 151; the plastic partition plate 2 is detachably connected to the inner wall of the receiving cavity 15 by the first fastening mechanism 16; each of the plurality of battery compartments 151 is provided with at least one of the plurality of battery cells 5.

[0040] In this way, the non-metallic shell 1 has a receiving cavity 15; the plastic partition plate 2 is arranged in the receiving cavity 15, and the plastic partition plate 2 divides the receiving cavity 15 into a plurality of battery compartments 151 for storing battery cells 5, and the battery cells 5 can be arranged in the battery compartments 151; the plastic partition plate 2 and the inner wall of the receiving cavity 15 are detachably fixedly connected by the first fastening mechanism 16, which facilitates the fixing or separation between the plastic partition plate 2 and the non-metallic shell 1; when the user disassembles the plastic partition plate 2, the plastic partition plate 2 is detached and separated from the non-metallic shell 1, which is very convenient.

[0041] In addition, the non-metallic shell 1 is made of non-metal, which has good heat insulation and insulation effects; the plastic partition plate 2 is made of plastic; the plastic material is easy to bond with glue, which facilitates the bonding of the battery cells 5 on the plastic partition plate 2 or the non-metallic shell 1, and the plastic has good heat insulation and insulation effects.

[0042] In one embodiment, the battery cells 5 are covered with a cover plate 6. In this way, the dust above is reduced to affect the battery cells 5.

[0043] In one embodiment, the battery cells 5 are lithium batteries.

[0044] In one embodiment, the non-metallic shell 1 is preferably made of plastic.

[0045] In one embodiment, the plastic can be any of the following materials: polyethylene, polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polyvinyl chloride, general-purpose polystyrene, polystyrene foam, impact-resistant polystyrene, styrene-acrylonitrile copolymer, acrylonitrile-butadiene-styrene copolymer, polymethacrylate, ethylene-vinyl acetate copolymer, polyethylene terephthalate, polybutylene terephthalate, polyamide, polycarbonate, polyformaldehyde ester, polyphenylene ether, polyphenylene sulfide, polyurethane, polystyrene, polytetrafluoroethylene.

[0046] Further, referring to FIGS. 1-8, as a specific embodiment of the battery module provided in the present application, the outer side wall 27 of the plastic partition plate 2 is recessed to form a groove 21; the groove 21 is filled with glue, and the plastic partition plate 2 and the plurality of battery cells 5 are bonded by the glue. In this way, the battery cells 5 are very firmly bonded to the plastic partition plate 2 by the glue.

[0047] In one embodiment, the outer side wall 27 of the plastic partition plate 2 is provided with a first bonding layer 41 for bonding the plurality of battery cells 5 in the plurality of battery compartments 151. In this way, the battery cells 5 can be fixed to the plastic partition plate 2 by the first bonding layer 41.

[0048] Further, referring to FIGS. 1-8, as a specific embodiment of the battery module provided in the present application, the second outer surface 252 of the plastic partition plate 2 is provided with a first reinforcing rib 26. In this way, the first reinforcing rib 26 can improve the bending resistance of the plastic partition plate 2.

[0049] Further, referring to FIGS. 1-8, as a specific embodiment of the battery module provided in the present application, the battery module further comprises: a second fastening mechanism 17; the non-metallic shell 1 comprises: a first side plate 11, a first end plate 13, a second side plate 12, and a second end plate 14; the first side plate 11, the first end plate 13, the second side plate 12, and the second end plate 14 are sequentially and fixedly connected end to end by the second fastening mechanism 17 to form a containing cavity 15. In this way, the first side plate 11, the first end plate 13, the second side plate 12, and the second end plate 14 are sequentially and fixedly connected end to end, and the positions of the connection between any two adjacent plates among the first side plate 11, the first end plate 13, the second side plate 12, and the second end plate 14 are fixed by the second fastening mechanism 17; when splicing the non-metallic shell 1, only the first side plate 11, the first end plate 13, the second side plate 12, and the second end plate 14 need to be connected end to end, making it very convenient to splice the non-metallic shell 1.

[0050] Further, please refer to FIG. 1 to FIG. 8, as a specific embodiment of the battery module provided by the present application, one end of the plastic separator 2 has a first bent edge 24 and / or a first protrusion 28 fixed on the inner wall of the first end plate 13, and the other end of the plastic separator 2 has a second bent edge 22 and / or a second protrusion 23 fixed on the inner wall of the second end plate 14. In this way, the plastic separator 2 can distribute stress to the first end plate 13 through the first bent edge 24 and / or the first protrusion 28; and the plastic separator 2 can distribute stress to the second end plate 14 through the second bent edge 22 and / or the second protrusion 23.

[0051] Further, please refer to FIG. 1 to FIG. 8, as a specific embodiment of the battery module provided by the present application, the second fastening mechanism 17 is a first screw; the first side plate 11, the first end plate 13, the second side plate 12, and the second end plate 14 are sequentially and respectively fixed and connected through the first screw. In this way, one end of the first side plate 11 is connected with one end of the first end plate 13 through the first screw, the other end of the first end plate 13 is connected with one end of the second side plate 12 through the first screw, the other end of the second side plate 12 is connected with one end of the second end plate 14 through the first screw, and the other end of the second end plate 14 is connected with the other end of the first side plate 11 through the first screw; so that the first side plate 11, the first end plate 13, the second side plate 12, and the second end plate 14 are fixed very firmly between the first end plate 13 and the second end plate 14.

[0052] In one embodiment, the first side plate 11, the first end plate 13, the second side plate 12, and the second end plate 14 are sequentially and respectively fixed and connected through three second screws. In this way, the first side plate 11, the first end plate 13, the second side plate 12, and the second end plate 14 are fixed very firmly between the first end plate 13 and the second end plate 14.

[0053] Among them, the first screw, the second screw and the third screw can adopt the same type of screw, or can adopt different types of screws.

[0054] Further, please refer to FIG. 1 to FIG. 8, as a specific embodiment of the battery module provided by the present application, the first side plate 11 has a first support 31 fixedly connected on the outer surface, and the second side plate 12 has a second support 32 fixedly connected on the outer surface; the first side plate 11 is located between the first support 31 and the second support 32, and the second side plate 12 is located between the first support 31 and the second support 32. In this way, the first support 31 and the second support 32 can support the non-metallic shell 1 from both sides.

[0055] In one embodiment, the first support 31 is integrally formed with the first side plate 11; and the second support 32 is integrally formed with the second side plate 12. In this way, the first side plate 11 and the first support 31 are very firm. The second side plate 12 and the second support 32 are very firm.

[0056] Further, referring to FIGS. 1-8, as a specific embodiment of the battery module provided by the present application, the first support 31 is in the form of a plate body arranged perpendicularly to the first side plate 11; the second support 32 is in the form of a plate body arranged perpendicularly to the second side plate 12; the structure formed by the first support 31 and the first side plate 11 is in the form of L or T; the structure formed by the second support 32 and the second side plate 12 is in the form of L or T. In this way, the structure in the form of L or T is not easy to bend under the action of external force, reducing the bending of the first support 31 and the first side plate 11 caused by the action of external force; the structure in the form of L or T is not easy to bend under the action of external force, reducing the bending of the second support 32 and the second side plate 12 caused by the action of external force.

[0057] In one embodiment, the surface of the first support 31 is provided with a plurality of second reinforcing ribs 311 arranged in cross; the surface of the second support 32 is provided with a plurality of third reinforcing ribs 321 arranged in cross. In this way, the second reinforcing ribs 311 arranged in cross can improve the bending resistance of the first support 31; the third reinforcing ribs 321 arranged in cross can improve the bending resistance of the second support 32.

[0058] Further, referring to FIGS. 1-8, as a specific embodiment of the battery module provided by the present application, the outer surface of the first end plate 13 is provided with a plurality of fourth reinforcing ribs 131 arranged in cross, the fourth reinforcing ribs 131 arranged in cross form a first cross portion 1311, the first cross portion 1311 is provided with a first screw hole 132; the outer surface of the second end plate 14 is provided with a plurality of fifth reinforcing ribs 141 arranged in cross, the fifth reinforcing ribs 141 arranged in cross form a second cross portion 1411, the second cross portion 1411 is provided with a second screw hole 142; the first fastening mechanism 16 includes: a second screw and a third screw; the second screw passes through the first screw hole 132 and fixedly connects the plastic partition plate 2 and the first end plate 13; the third screw passes through the second screw hole 142 and fixedly connects the plastic partition plate 2 and the second end plate 14. In this way, the fourth reinforcing ribs 131 arranged in cross can improve the bending resistance of the first end plate 13; the fourth reinforcing ribs 131 arranged in cross form the first cross portion 1311, the stress on the first cross portion 1311 can be distributed to the plurality of fourth reinforcing ribs 131; the second screw can fixedly connect the plastic partition plate 2 and the first end plate 13 after passing through the first screw hole 132, which is very convenient; the fifth reinforcing ribs 141 arranged in cross can improve the bending resistance of the second end plate 14; the fifth reinforcing ribs 141 arranged in cross form the second cross portion 1411, the stress on the second cross portion 1411 can be distributed to the plurality of fifth reinforcing ribs 141; the third screw can fixedly connect the plastic partition plate 2 and the second end plate 14 after passing through the second screw hole 142, which is very convenient.

[0059] Further, referring to FIGS. 1-8, as a specific embodiment of the battery module provided in the present application, the first cross section 1311 is in a cylindrical shape; the first screw hole 132 extends along the axial direction of the first cross section 1311, and the diameter of the first cross section 1311 is greater than the width of each of the plurality of fourth reinforcing ribs 131. In this way, the stress on the first cross section 1311 can be distributed to the plurality of fourth reinforcing ribs 131; the diameter of the first cross section 1311 is greater than the width of the fourth reinforcing rib 131, so that the first cross section 1311 has stronger mechanical bending resistance relative to the fourth reinforcing rib 131; the first screw hole 132 extends along the axial direction of the first cross section 1311, so as to facilitate the stress on the inner wall of the first screw hole 132 to be distributed along the extension direction of the first cross section 1311.

[0060] In one embodiment, the second cross section 1411 is in a cylindrical shape; the second screw hole 142 extends along the axial direction of the second cross section 1411, and the diameter of the second cross section 1411 is greater than the width of the fifth reinforcing rib 141. In this way, the stress on the second cross section 1411 can be distributed to the plurality of fifth reinforcing ribs 141; the diameter of the second cross section 1411 is greater than the width of each of the plurality of fifth reinforcing ribs 141, so that the second cross section 1411 has stronger mechanical bending resistance relative to the fifth reinforcing rib 141; the second screw hole 142 extends along the axial direction of the second cross section 1411, so as to facilitate the stress on the inner wall of the second screw hole 142 to be distributed along the extension direction of the second cross section 1411.

[0061] Further, referring to FIGS. 1-8, as a specific embodiment of the battery module provided in the present application, the inner wall of the accommodation cavity 15 is provided with a second adhesive layer 42 for adhering at least one of the plurality of battery cells 5 in the plurality of battery compartments 151. In this way, the battery cell 5 can be fixed to the inner wall of the accommodation cavity 15 through the second adhesive layer 42.

[0062] In one embodiment, the second adhesive layer 42 is located on the first side plate 11 and / or the second side plate 12.

[0063] Further, referring to FIGS. 1-8, as a specific embodiment of the battery module provided in the present application, the second adhesive layer 42 is UV glue; and the first adhesive layer 41 is structural glue.

[0064] Regarding UV glue: also known as photosensitive glue, ultraviolet light curing glue; UV glue is a kind of adhesive that can be cured by ultraviolet light irradiation, which can be used as an adhesive.

[0065] Regarding structural adhesive: structural adhesive refers to the adhesive with high strength (compressive strength > 65 MPa, steel-steel tensile bonding strength > 30 MPa, shear strength > 18 MPa), which can bear larger load, and is resistant to aging, fatigue and corrosion, and stable in performance within the expected service life, and is suitable for bonding of structural parts subjected to strong force.

[0066] The above only describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, which should also be considered as the protection scope of the present application.

Claims

1. A battery module comprising: A plurality of battery cells (5), a non-metallic shell (1) having a containing cavity (15), a plastic partition plate (2), and a first fastening mechanism (16); the plastic partition plate (2) is arranged in the containing cavity (15) and separates the containing cavity (15) into a plurality of battery compartments (151); the plastic partition plate (2) is detachably connected to the inner wall of the containing cavity (15) through the first fastening mechanism (16); at least one of the plurality of battery cells (5) is arranged in each of the plurality of battery compartments (151).

2. The battery module of claim 1, wherein, The outer side wall (27) of the plastic partition plate (2) is recessed to form a groove (21); the groove (21) is filled with glue, and the plastic partition plate (2) and the plurality of battery cells (5) are bonded by the glue.

3. The battery module of claim 1, wherein, The outer side wall (27) of the plastic partition plate (2) is provided with a first bonding layer (42) for bonding the plurality of battery cells (5) in the plurality of battery compartments (151).

4. The battery module of claim 1, wherein, The second outer surface (252) of the plastic partition plate (2) is provided with a first reinforcing rib (26).

5. The battery module of claim 1, wherein, The battery module further comprises a second fastening mechanism (17); the non-metallic shell (1) comprises a first side plate (11), a first end plate (13), a second side plate (12), and a second end plate (14); the first side plate (11), the first end plate (13), the second side plate (12), and the second end plate (14) are sequentially and fixedly connected end to end through the second fastening mechanism (17) to form the containing cavity (15).

6. The battery module of claim 5, wherein, One end of the plastic partition plate (2) has a first bent edge (24) and / or a first protrusion (28) fixed to the inner wall of the first end plate (13), and the other end of the plastic partition plate (2) has a second bent edge (22) and / or a second protrusion (22) fixed to the inner wall of the second end plate (14).

7. The battery module of claim 5, wherein, The second fastening mechanism (17) is a first screw; the first side plate (11), the first end plate (13), the second side plate (12), and the second end plate (14) are sequentially and fixedly connected end to end through the first screw.

8. The battery module of claim 7, wherein, The first side plate (11) is fixedly connected with a first bracket (31) on the outer surface, and the second side plate (12) is fixedly connected with a second bracket (32) on the outer surface; the first side plate (11) is located between the first bracket (31) and the second bracket (32), and the second side plate (12) is located between the first bracket (31) and the second bracket (32).

9. The battery module of claim 8, wherein, The first bracket (31) is in the form of a plate body perpendicular to the first side plate (11); the second bracket (32) is in the form of a plate body perpendicular to the second side plate (12); the structure formed by the first bracket (31) and the first side plate (11) is in the form of L or T, and the structure formed by the second bracket (32) and the second side plate (12) is in the form of L or T.

10. The battery module of claim 8, wherein, The surface of the first support (31) is provided with a plurality of second reinforcing ribs (311) arranged in cross with each other; the surface of the second support (32) is provided with a plurality of third reinforcing ribs (321) arranged in cross with each other.

11. The battery module of claim 5, wherein, The outer surface of the first end plate (13) is provided with a plurality of fourth reinforcing ribs (131) arranged in cross with each other, the plurality of fourth reinforcing ribs (131) are arranged in cross with each other to form a first cross portion (1311), the first cross portion (1311) is provided with a first screw hole (132); the outer surface of the second end plate (14) is provided with a plurality of fifth reinforcing ribs (141) arranged in cross with each other, the plurality of fifth reinforcing ribs (141) are arranged in cross with each other to form a second cross portion (1411), the second cross portion (1411) is provided with a second screw hole (142). The first fastening mechanism (16) comprises a second screw and a third screw; the second screw passes through the first screw hole (132) and fixedly connects the plastic partition plate (2) and the first end plate (13); the third screw passes through the second screw hole (142) and fixedly connects the plastic partition plate (2) and the second end plate (14).

12. The battery module of claim 11, wherein, The first cross portion (1311) is in a cylindrical shape; the first screw hole (132) extends along the axial direction of the first cross portion (1311), and the diameter of the first cross portion (1311) is greater than the width of each of the plurality of fourth reinforcing ribs (131).

13. The battery module of claim 11, wherein, The second cross portion (1411) is in a cylindrical shape; the second screw hole (142) extends along the axial direction of the second cross portion (1411), and the diameter of the second cross portion (1411) is greater than the width of each of the plurality of fifth reinforcing ribs (141).

14. The battery module of any one of claims 1 to 13, wherein, The inner wall of the accommodating cavity (15) is provided with a plurality of second adhesive layers (41) for adhering the plurality of battery cells (5) in the plurality of battery compartments (151).

15. The battery module of claim 14, wherein, The plurality of second adhesive layers (41) are UV glue; and the first adhesive layer (42) is structural glue.

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