CN-122025958-A - Battery module

Abstract

The invention provides a battery module, which comprises a battery cell assembly, an epoxy plate layer and a coating layer, wherein a terminal wire extends out of the middle position of the top of the battery cell assembly, the epoxy plate layer is sleeved on the outer surface of the battery cell assembly, a concave hole part for avoiding the terminal wire is formed in the epoxy plate layer, the coating layer comprises a first coating layer and a second coating layer, the first coating layer is coated on the epoxy plate layer and is positioned on one side of the terminal wire, the second coating layer is coated on the epoxy plate layer and is positioned on the other side of the terminal wire, and a sealing glue layer is coated on a gap between the first coating layer, the second coating layer and the terminal wire. The battery module of this scheme can be used to for the power supply of cleaning robot. Through designing the coating layer into split type first coating layer and second coating layer to combine the shrinkage pool portion on the epoxy sheet layer and the sealing glue layer of terminal line department, solved traditional single thermoplastic film and can't realize even cladding when terminal line is drawn forth from the top centre problem.

Inventors

• CUI BOHU
• PU SHI

Assignees

• 东莞市嘉洋电池有限公司

Dates

Publication Date

20260512

Application Date

20260413

Claims (10)

1. 1. A battery module, comprising: The middle position of the top of the battery cell assembly extends out of the terminal wire; The epoxy plate layer is sleeved on the outer surface of the battery cell assembly, and is provided with a concave hole part avoiding the terminal wire; the coating layer comprises a first coating layer and a second coating layer, wherein the first coating layer is coated on the epoxy plate layer and is positioned on one side of the terminal wire, the second coating layer is coated on the epoxy plate layer and is positioned on the other side of the terminal wire, and a sealing adhesive layer is coated on a gap among the first coating layer, the second coating layer and the terminal wire.
2. 2. The battery module of claim 1, wherein the battery cell assembly comprises a plurality of battery cells, an upper bracket, a lower bracket and a protective plate, the protective plate is positioned on the top surface of the upper bracket, the upper bracket is detachably connected with the lower bracket, the upper bracket is provided with a first positioning groove, the lower bracket is provided with a second positioning groove, and the plurality of battery cells are positioned between the first positioning groove and the second positioning groove.
3. 3. The battery module of claim 2, wherein the upper bracket comprises an upper mounting plate and an upper connecting post, the lower bracket comprises a lower mounting plate and a lower connecting post, the first positioning groove is formed in the lower surface of the upper mounting plate, the second positioning groove is formed in the upper surface of the lower mounting plate, and the upper connecting post is in butt joint detachable connection with the lower connecting post.
4. 4. The battery module of claim 3, wherein the cell assembly further comprises a connecting member, a first through hole is formed in the upper connecting post, a second through hole is formed in the lower connecting post, one end of the connecting member is positioned in the first through hole, and the other end of the connecting member is detachably connected in the second through hole.
5. 5. The battery module according to claim 3, wherein the periphery of the upper connection post is provided with a first reinforcing rib opened along the length direction of the upper connection post, and the periphery of the lower connection post is provided with a second reinforcing rib opened along the length direction of the lower connection post.
6. 6. The battery module according to claim 3, wherein a third positioning groove for positioning the protection plate is formed in the upper surface of the upper mounting plate, a positioning seat is formed in the bottom of the third positioning groove, a positioning hole is formed in the protection plate, and the protection plate is positioned in the positioning seat after being penetrated through the positioning hole by a fastening piece.
7. 7. The battery module of claim 6, wherein the battery cell assembly further comprises a conductive sheet, the conductive sheet is used for connecting a plurality of the rolled battery cells in series or in parallel, conductive grooves attached with the conductive sheet are respectively arranged on the upper surface of the upper mounting plate and the lower surface of the lower mounting plate, and through holes for electrically connecting the conductive sheet with the anode and the cathode of the battery are respectively arranged on the upper mounting plate and the lower mounting plate.
8. 8. The battery module of claim 6, wherein a routing cavity for accommodating an electrical connection wire is provided between the bottom of the third positioning groove and the protection plate.
9. 9. The battery module of claim 1, wherein the epoxy board layer comprises a bottom epoxy board, a side epoxy board and a top epoxy board that are coated outside the cell assembly, and the recess is formed in the top epoxy board.
10. 10. The battery module of claim 2, wherein the cell assembly further comprises a heating film coated on the outer surface of the battery cell for preheating the battery cell in a low temperature environment.

Description

Battery module Technical Field The invention relates to the technical field of battery modules, in particular to a battery module. Background In the production practice of battery modules, conventional encapsulation processes commonly employ a single thermoplastic film to provide integral coverage of the outer surface of the module, with terminal wires typically designed to be routed from the top edge region of the module. Under the layout, the thermoplastic film can completely cover all exposed surfaces of the module to form a continuous and uninterrupted insulating barrier, so that moisture permeation, dust deposition and mechanical impact in the external environment are effectively isolated, and the stability and the safety of battery operation are maintained. However, in certain applications, such as when optimizing the space layout or meeting specific electrical connection requirements, the terminal wires must be directly protruded from the top middle region of the battery module. At this time, the existing integral thermoplastic film structure has the remarkable defects that the film is an indistinct continuous material, and the structural integrity of the film cannot be damaged inevitably due to the fact that a hole is formed in the center of the top to accommodate a terminal wire, so that uniform lamination cannot be realized in the coating process, and further the problems of partial coverage loss, insulation performance reduction and the like are caused, and the risks of moisture invasion, electrical short circuit and battery performance degradation are increased. Disclosure of Invention The present invention is directed to a battery module that solves at least some of the above-mentioned problems. The invention provides a battery module, which comprises a battery cell assembly, an epoxy plate layer and a coating layer, wherein a terminal wire extends out of the middle position of the top of the battery cell assembly, the epoxy plate layer is sleeved on the outer surface of the battery cell assembly, the epoxy plate layer is provided with a concave hole part for avoiding the terminal wire, the coating layer comprises a first coating layer and a second coating layer, the first coating layer is coated on the epoxy plate layer and is positioned on one side of the terminal wire, the second coating layer is coated on the epoxy plate layer and is positioned on the other side of the terminal wire, and a sealing glue layer is coated on a gap among the first coating layer, the second coating layer and the terminal wire. Further, the electric core subassembly includes a plurality of core battery, upper bracket, lower carriage and protection shield, the protection shield is located the top surface of upper bracket, the upper bracket with the lower carriage is dismantled and is connected, the upper bracket is equipped with first constant head tank, the lower carriage is equipped with the second constant head tank, a plurality of core battery location of rolling up is located first constant head tank with between the second constant head tank. Further, the upper bracket comprises an upper mounting plate and an upper connecting column, the lower bracket comprises a lower mounting plate and a lower connecting column, the first positioning groove is formed in the lower surface of the upper mounting plate, the second positioning groove is formed in the upper surface of the lower mounting plate, and the upper connecting column is in butt joint detachable connection with the lower connecting column. Further, the battery cell assembly further comprises a connecting piece, a first through hole is formed in the upper connecting column, a second through hole is formed in the lower connecting column, one end of the connecting piece is positioned in the first through hole, and the other end of the connecting piece is detachably connected in the second through hole. Further, the periphery of the upper connecting column is provided with a first reinforcing rib which is arranged along the length direction of the upper connecting column, and the periphery of the lower connecting column is provided with a second reinforcing rib which is arranged along the length direction of the lower connecting column. Further, the upper surface of the upper mounting plate is provided with a third positioning groove for positioning the protection plate, the bottom of the third positioning groove is provided with a positioning seat, the protection plate is provided with a positioning hole, and the protection plate is positioned in the positioning seat after penetrating through the positioning hole through a fastener. Further, the battery cell assembly further comprises a conductive sheet, wherein the conductive sheet is used for connecting a plurality of battery cells in series or in parallel, conductive grooves for attaching the conductive sheet are respectively formed in the upper surface of the upper mounting plate and the lower surface of