High-safety battery module

Abstract

The utility model discloses a high-safety battery module. The battery module comprises a module shell, a module frame, a busbar, a heating sheet, a heat insulation fire extinguishing sheet, an FPC (Flexible Printed Circuit) acquisition board, a single battery and heat insulation glue, a plurality of single batteries are connected in series and in parallel to form a battery module, each single battery is wound with a heating sheet and then is mounted in a module shell, and a heat-insulating fire-extinguishing sheet is arranged between every two single batteries; gaps in the module shell are filled with polyurethane foaming heat insulation glue, and the heat insulation fire extinguishing pieces and the heat insulation glue form a plurality of independent battery bin bodies; the busbar and the FPC sampling plate are arranged at the top of the battery module and are placed at the upper ends of positive and negative electrode lugs of the battery; and the single battery is adhered to the bottom of the module shell through a high-heat-conductivity-coefficient structural adhesive. According to the utility model, heat is isolated through the battery compartment, heat transferred to the adjacent single batteries is slowed down, fire and explosion of the battery module caused by heat accumulation are avoided, and the safety is high.

Description

Technical Field

[0001] The utility model relates to the field of lithium-ion batteries, and more specifically, to a high-safety battery module. Background Art

[0002] With the widespread adoption of new energy vehicles in various sectors, including family cars, buses, taxis, logistics vehicles, and specialized vehicles, new energy vehicles are gradually becoming mainstream products. The adoption of lithium batteries in low-speed electric vehicles and electric bicycles is also accelerating, and the lithium battery market for energy storage is also growing rapidly. As the application of lithium-ion batteries expands, fires caused by thermal runaway are increasing, attracting increasing attention and placing greater demands on battery safety to fully ensure safety in various scenarios. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a high-safety battery module.

[0004] The utility model discloses a high-safety battery module, which is realized by the following technical scheme, wherein the battery module comprises a module shell, a module frame, a bus, a heating plate, a heat-insulating fire-extinguishing plate, an FPC collection board, a single cell, and a heat-insulating adhesive; a battery module is formed by connecting a plurality of single cells in series and parallel, and each single cell is installed in the module shell after being wrapped with a heating plate, and a heat-insulating fire-extinguishing plate is arranged between each single cell; the internal gap of the module shell is filled with polyurethane foam heat-insulating adhesive, and the heat-insulating fire-extinguishing plate and the heat-insulating adhesive form a plurality of separate battery compartments; a bus and an FPC sampling board are arranged on the top of the battery module, and the bus and the FPC sampling board are placed on the upper ends of the positive and negative pole ears of the battery, and the series-parallel connection and sampling connection between the single cells are completed by laser welding, and the single cells are bonded to the bottom of the module shell by a high thermal conductivity structural adhesive; wherein the module frame is arranged on the upper ends of the positive and negative pole ears of the battery.

[0005] The heat-insulating fire-extinguishing sheet is a composite structure, with a heat-insulating sheet in the middle and fire-extinguishing sheets on both sides. It uses microcapsule technology to encapsulate pollution-free green fire extinguishing agent in microcapsules and uses adhesive to make sheets. When the temperature of the single battery rises to a certain temperature, the fire extinguishing agent is automatically released.

[0006] The thermal insulation fire extinguishing sheet has two functions. One is that when the temperature of the single battery rises to a certain level, the microcapsules in the fire extinguishing sheet release fire extinguishing gas to prevent the further spread of thermal runaway. The other is its excellent thermal insulation effect.

[0007] The heating, insulation, and temperature balance of battery modules are closely related to the battery structure design. The rational arrangement of the internal components of the battery module and the bonding of the individual cells to the bottom of the module shell with a high-thermal-conductivity structural adhesive ensure rapid heat conduction, reduce thermal resistance, accelerate heat transfer, minimize temperature differences between cells in different locations, and improve temperature uniformity.

[0008] The module housing adopts a lightweight design and has the characteristics of light weight and high strength.

[0009] The heating plate adopts a variable power design, arranging heating wires of different powers at different heating positions. Finally, these heating wires of different powers are encapsulated in the same heating film. Different heating powers are set according to different heating positions inside the module to ensure uniform heating of the battery module.

[0010] The FPC sampling board integrates voltage and temperature sampling functions. It is laser welded to the series copper bus through the sampling board and thermistor structure on the FPC, and also has a fuse to play a protective role.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The high-safety battery module disclosed in this utility model isolates heat through the battery compartment in the event of thermal runaway of a single cell, slowing the transfer of heat to adjacent cells and preventing heat accumulation that could cause the battery module to catch fire or explode, thus offering high safety. Combined with the use of high-safety single cells and the module assembly structure of this utility model, the battery module is capable of withstanding needle puncture and gunshot. This utility model has a simple and compact structure, a high module specific energy, and flexible dimensions, allowing for easy deployment in spaces of varying sizes, thus possessing broad practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the module framework of the present utility model. DETAILED DESCRIPTION

[0015] In order to be able to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of this application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention. The embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0016] like Figure 1-2 As shown, a high-safety battery module comprises a module housing 1, a module frame 2, a busbar 3, a heating plate 4, an insulating fire extinguishing plate 5, an FPC collection board 6, a single cell 7, and an insulating adhesive 8. Each single cell 7 is wrapped around a heating plate 4 and then placed in the module housing 1. Insulating fire extinguishing plates 5 are arranged between each string of single cells. After assembly, the internal gaps of the module housing 1 are filled with polyurethane foam insulating adhesive 8. The insulating fire extinguishing plates and the insulating adhesive form multiple separate battery compartments. A busbar and an FPC sampling board are arranged at the top of the module, and the series and parallel connections and sampling connections between the single cells are completed by laser welding. At the same time, the single cells are bonded to the bottom of the module housing with a high thermal conductivity structural adhesive to ensure rapid heat conduction, reduce thermal resistance, accelerate heat transfer, reduce temperature differences between batteries in different positions, and improve temperature uniformity.

[0017] It should be noted that in the event of thermal runaway of a single cell, the battery compartment isolates the heat, slowing down the heat transfer to adjacent single cells, avoiding heat accumulation and causing the battery module to catch fire and explode, thus ensuring high safety.

[0018] It should also be noted that, in combination with the use of high-safety single cells and the module combination structure of the present invention, the battery module has the ability to withstand needle puncture and gunshot, greatly improving the safety of the battery system.

[0019] In summary, the utility model has a simple and compact structure, a high module specific energy, and a flexible size. It can be conveniently arranged within spaces of different sizes and has broad practical significance for promotion.

[0020] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A high-safety battery module, characterized in that: The battery module includes a module shell, a module frame, a bus, a heating plate, an insulating fire extinguishing plate, an FPC collection board, a single cell, and insulating glue; the battery module is composed of multiple single cells connected in series and parallel, each single cell is installed in the module shell after being wrapped with a heating plate, and an insulating fire extinguishing plate is arranged between each single cell; the internal gap of the module shell is filled with polyurethane foam insulating glue, and the insulating fire extinguishing plate and the insulating glue form multiple separate battery compartments; a bus and an FPC sampling board are arranged on the top of the battery module, and the bus and FPC sampling board are placed on the upper end of the positive and negative pole ears of the battery, and the series and parallel connection and sampling connection between the single cells are completed by laser welding, and the single cell and the bottom of the module shell are bonded by a high thermal conductivity structural glue; the module frame is arranged on the upper end of the positive and negative pole ears of the battery.

2. The high-safety battery module according to claim 1, characterized in that: The heat-insulating fire-extinguishing plate is a composite structure, with a heat-insulating plate in the middle and fire-extinguishing plates on both sides.

3. The high-safety battery module according to claim 1, characterized in that: The heating plate adopts a variable power design, and heating wires of different powers are arranged at different heating positions. Finally, these heating wires of different powers are encapsulated in the same heating film.

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