A battery module

Abstract

The present invention discloses a battery module, comprising a shell, a battery cover and a battery pack arranged in the shell; the shell is divided into a plurality of cavities by a partition, the battery pack comprises a plurality of battery cells correspondingly arranged in the cavities; each of the battery cells is electrically connected via a conductive bar. The battery module of the present invention has a simple overall structure, high integration, light weight, high strength, and low manufacturing cost; the battery shell has good barrier properties, thermal conductivity, and insulation, can prevent electromagnetic interference, and greatly improves the safety of battery use.

Description

Technical Field

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

[0002] Under the dual pressure of increasingly serious resource shortages and worsening environmental pollution, lithium-ion batteries have been favored in many fields due to their high energy density, fast charging speed, high output power, long cycle life, and environmental friendliness. With the development of the lithium-ion battery industry and the introduction of various policies, the improvement of its energy density, how to further reduce the cost of battery modules and improve the safety of batteries during use has become a focus of the industry.

[0003] However, the current battery module assembly has many parts, the assembly process is complicated, and the integration is low, resulting in low battery module energy density and high battery production costs. In view of this, it is urgent to provide a battery module with a simple structure, high integration and energy density. Summary of the invention

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a battery module, including a shell, a battery cover and a battery pack arranged in the shell;

[0005] The shell is divided into a plurality of cavities by partitions, and the battery pack includes a plurality of battery cells correspondingly arranged in the cavities; each of the battery cells is electrically connected via a conductive bus.

[0006] In the above solution, the shell is divided into multiple groups of symmetrically arranged cavities by one / multiple transverse partitions and multiple longitudinal partitions.

[0007] In the above solution, explosion-proof valves and liquid injection holes corresponding to the cavities are respectively arranged on the battery cover.

[0008] In the above solution, the outer side surface and the bottom surface of the shell include an inner cavity layer and a second metal layer coated on the outer side of the inner cavity layer;

[0009] The inner cavity layer is a plastic layer.

[0010] In the above scheme, the transverse partition and the longitudinal partition respectively include an insulating layer of two adjacent cavities and a first metal layer sandwiched between the two insulating layers; the insulating layer is a plastic layer.

[0011] In the above solution, the outer layer of the second metal layer is coated with an outer plastic layer.

[0012] In the above scheme, the inner cavity layer is a PP layer or a PE layer;

[0013] The second metal layer is an aluminum layer, an iron layer, a copper layer, a nickel layer or an alloy layer.

[0014] In the above solution, the outer plastic layer is a PP layer, a PE layer, a PET layer, or an ONy layer.

[0015] In the above scheme, the thickness of the inner cavity layer and the outer plastic layer is 0.1 to 5 mm;

[0016] The second metal layer has a thickness of 0.1 to 2 mm.

[0017] In the above solution, the battery cover includes a lower insulating layer, an intermediate metal layer and an upper protective layer.

[0018] The battery module of the present invention has a simple overall structure, high integration, light weight, high strength, and low manufacturing cost. The battery shell has good barrier properties, thermal conductivity, and insulation properties, can prevent electromagnetic interference, and greatly improves the safety of battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of the module provided by the present invention;

[0020] Figure 2 A schematic diagram of the structure of the electrode row provided by the present invention;

[0021] Figure 3 A schematic diagram of the structure of the intermediate conductive bar provided by the present invention;

[0022] Figure 4 A schematic diagram of the structure of the outer conductive bar provided by the present invention;

[0023] Figure 5 An exploded view of the shell partition composite structure provided by the present invention;

[0024] Figure 6 This is an exploded view of the composite structure of the outer side and bottom of the shell provided by the present invention. DETAILED DESCRIPTION

[0025] The battery module of the present invention has a simple structure, high integration, high energy density, light weight, high strength, and low manufacturing cost. The battery shell has good barrier properties, thermal conductivity, insulation, and strength, can prevent electromagnetic interference, and greatly improve the safety of battery use. It should also be noted that in the present invention, the orientation or position relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does 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 invention; the present invention is described in detail below in conjunction with the specific implementation methods and the drawings in the specification.

[0026] like Figure 1 As shown, the present invention provides a battery module, comprising a housing 1, a battery cover 2 and a battery pack 3 arranged in the housing 1;

[0027] In this embodiment, the shell 1 is divided into multiple cavities 12 by partitions, and the battery pack 3 includes multiple groups of battery cells 31 correspondingly arranged in the cavities 12; each battery cell 31 is electrically connected to a conductive bus arranged on the outer side of the shell 1 and the partition.

[0028] In this embodiment, the shell 1 is divided into multiple groups of symmetrically arranged cavities 12 by multiple transverse partitions 4 and multiple longitudinal partitions 5. Middle conductive rows 6 that are perpendicular to the transverse partitions 4 and extend toward the inner side of the shell 1 are respectively arranged on both sides of the upper edge of each transverse partition 4; the outer side of the shell 1 is also provided with an output electrode row 7 and an outer conductive row 8 for electrically connecting to the battery cell 31.

[0029] like Figure 2 As shown, the pole row 7 is arranged at the outer corner of the shell 1, including a right-angled pole row body 71, and a first conductive foot 72 vertically arranged on the inner side surface of one side of the pole row body 71 and passing through the outer side surface of the shell 1, the first conductive foot 72 is arranged opposite to the middle conductive row, and the pole row body 71 and the first conductive foot 72 are integrally formed.

[0030] like Figure 3 As shown, the middle conductive bar 6 includes a second conductive foot 61 and a third conductive foot 62 , which are passed through and fixed on the transverse partition 4 and arranged in two adjacent cavities 12 in the longitudinal direction.

[0031] like Figure 4 As shown, the outer conductive bar 8 includes a conductive bar body 81, and a third conductive foot 82 and a fourth conductive foot 83 vertically arranged on the side of the conductive bar body 81 and penetrating the shell 1. The third conductive foot 82 and the fourth conductive foot 83 are respectively arranged in two laterally adjacent cavities 12, and are respectively arranged corresponding to the adjacent middle conductive bar 6. The conductive bar body 81 and the third conductive foot 82 and the fourth conductive foot 83 are integrally formed.

[0032] The first conductive pin 72 of the output electrode row 7, the second conductive pin 61 and the third conductive pin 62 of the middle conductive row 6, and the third conductive pin 82 of the outer conductive row 8 are connected to the pole ears set on both sides of the battery unit 31 to realize the series connection of the battery packs in two longitudinally adjacent cavities 12, and then the fourth conductive pin 83 of the outer conductive row 8 is used to realize the series connection with the battery units 31 in the remaining longitudinally adjacent cavities 12 in turn.

[0033] In this embodiment, explosion-proof valves 9 and liquid injection holes 10 corresponding to the cavities 12 are respectively provided on the battery cover 2 .

[0034] like Figure 5As shown, in this embodiment, the shell 1 includes one or more transverse partitions 4 and multiple longitudinal partitions 5. The composite form of the transverse partition 4 and the longitudinal partition 5 is the same, including an insulating layer 41 located in two adjacent cavities 12 and a first metal layer 42 sandwiched between the two insulating layers 41; the insulating layer 41 is a plastic layer, and the insulating layer 41 is a PP layer or a PE layer with a thickness of 0.1 to 5 mm; the first metal layer 42 is an aluminum layer, an iron layer, a copper layer, a nickel layer or an alloy layer with a thickness of 0.1 to 2 mm.

[0035] like Figure 6 As shown, in this embodiment, the outer side surface and the bottom surface of the shell 1 except the transverse partition 4 and the longitudinal partition 5 include an inner cavity layer 111 and a second metal layer 112 coated on the outer side of the inner cavity layer; the inner cavity layer 111 is a plastic layer, and the inner cavity layer 111 is a PP layer or a PE layer;

[0036] The outer layer of the second metal layer 112 is coated with an outer plastic layer 113, and the outer plastic layer 113 is a PP layer, a PE layer, a PET layer, or an ONy layer; the inner cavity layer 111 and the outer plastic layer 113 have a thickness of 0.1 to 5 mm; the second metal layer 112 is an aluminum layer, an iron layer, a copper layer, a nickel layer or an alloy layer, and has a thickness of 0.1 to 2 mm.

[0037] In this embodiment, the composition structure of the battery cover 2 is the same as the composition structure of the outer side of the shell 1, and the lower insulating layer, the middle metal layer and the upper protective layer are arranged from bottom to top corresponding to the inner cavity layer, the second metal layer and the outer plastic layer, and the thickness and material setting of each layer of the battery cover 2 are consistent with the outer side of the shell 1; the battery cover 2 is sealed on the shell 1.

[0038] In this embodiment, the inner cavity layer of the shell 1 and the outer layer of the partition are both insulating layers, which improve the insulation performance of the battery module. The metal layer coated on the outside of the inner cavity greatly improves the water resistance of the battery module, and can improve the strength of the entire structure and enhance the thermal conductivity of the module. The plastic layer on the metal outside of the shell 1 and the battery cover 2 increases the insulation performance of the module. The use of the composite shell combines the good insulation that the metal shell does not have and the good water resistance, thermal conductivity and strength that the plastic shell does not have. The integrated shell reduces the number of module parts, simplifies the module assembly process, and reduces the module cost.

[0039] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention.

Claims

1. A battery module, characterized in that: It comprises a housing (1), a battery cover (2) and a battery pack (3) arranged in the housing (1); The housing (1) is divided into a plurality of cavities (12) by a partition, and the battery pack (3) comprises a plurality of battery cells (31) correspondingly arranged in the cavities (12); the battery cells (31) are electrically connected via a conductive bus; The shell (1) is divided into a plurality of symmetrically arranged cavities (12) by one or more transverse partitions (4) and a plurality of longitudinal partitions (5); The transverse partition (4) and the longitudinal partition (5) respectively comprise an insulating layer (41) of two adjacent cavities and a first metal layer (42) sandwiched between the two insulating layers (41); the insulating layer (41) is a plastic layer; Middle conductive rows (6) perpendicular to the transverse partitions (4) and extending toward the inner side of the shell (1) are respectively arranged on both sides of the upper edge of each transverse partition (4); and an output electrode row (7) and an outer conductive row (8) for electrically connecting to the battery unit (31) are also arranged on the outer side of the shell (1).

2. The battery module according to claim 1, characterized in that: The battery cover (2) is provided with explosion-proof valves (9) and liquid injection holes (10) corresponding to the cavities (12).

3. The battery module according to claim 1, characterized in that: The outer side surface and the bottom surface of the shell (1) include an inner cavity layer (111) and a second metal layer (112) coated on the outer side of the inner cavity layer (111); The inner cavity layer (111) is a plastic layer.

4. The battery module according to claim 3, characterized in that: The outer layer of the second metal layer (112) is coated with an outer plastic layer (113).

5. The battery module according to claim 3, characterized in that: The inner cavity layer (111) is a PP layer or a PE layer; The second metal layer (112) is an aluminum layer, an iron layer, a copper layer, a nickel layer or an alloy layer.

6. The battery module according to claim 4, characterized in that: The outer plastic layer (113) is a PP layer, a PE layer, a PET layer, or an ONy layer.

7. The battery module according to claim 4, characterized in that: The thickness of the inner cavity layer (111) and the outer plastic layer (113) is 0.1 to 5 mm; The second metal layer (112) has a thickness of 0.1 to 2 mm.

8. The battery module according to claim 1, characterized in that: The battery cover (2) comprises a lower insulating layer, a middle metal layer and an upper protective layer.

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