A lithium battery cell module with integrated thermal runaway protection structure
By introducing an integrated structure of cell insulation heat layer and pressure relief valve fireproof sticker into the lithium battery cell module, the problems of heat spread and spark generation during thermal runaway are solved, achieving efficient fire protection and improved energy density.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU JINYUAN HUANYU POWER TECHNOLOGY CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-06-30
AI Technical Summary
Existing lithium battery modules cannot effectively prevent heat spread, reduce the temperature of the pressure relief airflow, and eliminate sparks in the event of thermal runaway. They also have complex structures, increased weight, and fireproof layers that hinder heat dissipation and high density of filler between cells that reduce energy density.
The device employs an integrated structure of a battery cell thermal insulation layer and a pressure relief valve fireproof sticker. The battery cell thermal insulation layer is made of aerogel, light-blocking agent, and reinforcing fiber material, with a thickness of 1.5–3.5 mm, and is used to block heat transfer. The pressure relief valve fireproof sticker consists of a polymorphic silicon material board and an insulating encapsulation layer, and is used to melt and extinguish sparks.
It delays heat spread for more than 99 seconds, reduces the temperature of the depressurized airflow, eliminates sparks, prevents fires, has a simple structure, is easy to operate, and improves safety and energy density.
Smart Images
Figure CN224437710U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium battery cell module technology, specifically to a lithium battery cell module with an integrated thermal runaway protection structure. Background Technology
[0002] In the field of new energy power batteries, factors such as overcharging, over-discharging, short circuits, external heat sources, and mechanical damage can lead to uncontrolled chemical reactions within the battery, resulting in heat accumulation and temperature increases, ultimately causing thermal runaway. The high temperatures caused by thermal runaway can ignite flammable materials inside the battery, causing fires and explosions, posing a serious threat to people, property, and the environment. Existing lithium battery cell modules have complex structures, and the overall encapsulated fireproof layer hinders heat dissipation from the cells, leading to abnormal temperature rises. They cannot accurately protect the pressure relief valves, and the high density of rock wool filling between cells reduces energy density. They also fail when corroded by electrolytes, and the external fire extinguishing agent spray response of the lithium battery cell module is delayed, resulting in a high re-ignition rate. Furthermore, they increase system complexity and weight. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a lithium battery cell module with an integrated thermal runaway protection structure. This not only prevents the cell from transferring heat and delays the spread of heat, but also reduces the temperature of the pressure relief airflow and eliminates sparks, thus effectively solving the problems in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery cell module with an integrated thermal runaway protection structure, comprising a battery cell, electrode posts respectively disposed at both ends of the upper surface of the battery cell, a pressure relief valve disposed at the center of the upper surface of the battery cell, the battery cells being arranged sequentially from left to right to form a battery cell module, a battery cell spacer heat layer disposed between two adjacent battery cells, a pressure relief valve fireproof sticker affixed to the center of the upper surface of the battery cell module, the pressure relief valve on the battery cell being covered by the pressure relief valve fireproof sticker, a fixed protective frame fixed to the outside of the battery cell module, and protective plates disposed on the front and rear sides of the battery cell module.
[0005] Furthermore, the thickness of the cell heat insulation layer is 1.5–3.5 mm, and double-sided adhesive is provided on both sides of the cell heat insulation layer to bond the cell heat insulation layer to the cell.
[0006] Furthermore, the pressure relief valve fireproof sticker includes a polymorphic silicon material board, the outer side of which is wrapped with an insulating encapsulation layer, and the lower surface of the insulating encapsulation layer is pasted to the upper surface of the battery cell module.
[0007] Compared with the prior art, the beneficial effects of this utility model are that the heat-insulating layer between the battery cells can block the heat transfer between the cells and delay the spread of heat by more than 99 seconds. The fireproof sticker of the pressure relief valve can reduce the temperature of the pressure relief gas flow and eliminate the sparks generated when the pressure relief valve releases gas. When the pressure relief valve generates sparks, it first melts the polymorphic silicon material plate on the fireproof sticker of the pressure relief valve. The molten liquid will extinguish the sparks generated when the pressure relief valve releases gas. In this way, fire is prevented and fire is prevented. This lithium battery cell module with integrated thermal runaway protection structure has a simple structure and is easy to operate. It can not only prevent the cells from transferring heat and delay the spread of heat, but also reduce the temperature of the pressure relief gas flow and eliminate sparks. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the structure of this utility model;
[0009] Figure 2 This is a schematic diagram of the battery cell module structure of this utility model;
[0010] Figure 3 This is a schematic diagram of the structure of the battery cell and the battery cell heat-insulating layer of this utility model;
[0011] Figure 4 This is a schematic diagram of the fireproof sticker structure of the pressure relief valve of this utility model.
[0012] In the diagram: 1. Battery cell thermal insulation layer, 2. Electrode post, 3. Pressure relief valve, 4. Battery cell, 5. Pressure relief valve fireproof sticker, 51. Polymorphic silicon material board, 52. Insulating encapsulation layer, 6. Protective plate, 7. Fixed protective frame, 8. Double-sided adhesive. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0014] Please see Figure 1-4This utility model provides a technical solution: a lithium battery cell module with an integrated thermal runaway protection structure, including a battery cell 4, electrode posts 2 respectively disposed at both ends of the upper surface of the battery cell 4, a pressure relief valve 3 disposed at the center of the upper surface of the battery cell 4, the battery cells 4 arranged sequentially from left to right to form a battery cell module, a battery cell heat insulation layer 1 disposed between two adjacent battery cells 4, a pressure relief valve fireproof sticker 5 affixed to the center of the upper surface of the battery cell module, the pressure relief valve fireproof sticker 5 covering the pressure relief valve 3 on the battery cell 4, a fixed protective frame 7 fixed to the outside of the battery cell module, and protective plates 6 disposed on the front and rear sides of the battery cell module, the thickness of the battery cell heat insulation layer 1 is 1.5–3.5 mm, double-sided adhesive 8 is provided on both sides of the battery cell heat insulation layer 1, the battery cell heat insulation layer 1 and the battery cell 4 are attached by the double-sided adhesive 8, and the battery cell heat insulation layer 1 is made of aerogel, light-shielding agent and reinforcing fiber material, and the pressure relief valve fireproof sticker 5 includes polymorphic silicon material. The polymorphic silicon material board 51 is wrapped with an insulating encapsulation layer 52 on its outer side. The lower surface of the insulating encapsulation layer 52 is attached to the upper surface of the battery cell module. The polymorphic silicon material board 51 is made of aerogel, alumina fiber and silica sol. The heat insulation layer 1 of the battery cell can block the heat transfer between the battery cells 4 and delay the spread time by more than 99 seconds. The fireproof sticker 5 of the pressure relief valve can reduce the temperature of the pressure relief gas flow of the pressure relief valve 3 and eliminate the sparks generated when the pressure relief valve 3 releases pressure. When the pressure relief valve 3 generates sparks, it first melts the polymorphic silicon material board 51 on the fireproof sticker 5 of the pressure relief valve. The molten liquid will extinguish the sparks generated when the pressure relief valve 3 releases pressure. In this way, fire is prevented and fire is prevented. The lithium battery cell module with integrated thermal runaway protection structure has a simple structure and is easy to operate. It can not only prevent the battery cells 4 from transferring heat and delay the spread of heat, but also reduce the temperature of the pressure relief gas flow and eliminate sparks.
[0015] In use: The heat-insulating layer 1 between the battery cells can block the heat transfer between the battery cells 4, delaying the spread of heat by more than 99 seconds. The fireproof sticker 5 of the pressure relief valve can reduce the temperature of the airflow during the pressure relief valve 3 and eliminate the sparks generated when the pressure relief valve 3 releases pressure. When the pressure relief valve 3 generates sparks, it first melts the polymorphic silicon material plate 51 on the fireproof sticker 5 of the pressure relief valve. The molten liquid will extinguish the sparks generated when the pressure relief valve 3 releases pressure. In this way, fire can be prevented and fire can be prevented.
[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.
Claims
1. A lithium battery cell module with an integrated thermal runaway protection structure, comprising a battery cell (4), characterized in that: Electrode posts (2) are respectively provided at both ends of the upper surface of the battery cell (4). A pressure relief valve (3) is provided at the center of the upper surface of the battery cell (4). The battery cells (4) are arranged in sequence from left to right to form a battery cell module. A battery cell heat-insulating layer (1) is provided between two adjacent battery cells (4). A pressure relief valve fireproof sticker (5) is pasted at the center of the upper surface of the battery cell module. The pressure relief valve (3) on the battery cell (4) is covered by the pressure relief valve fireproof sticker (5). A fixed protective frame (7) is fixed on the outside of the battery cell module. Protective plates (6) are provided on the front and rear sides of the battery cell module.
2. The lithium battery cell module with an integrated thermal runaway protection structure according to claim 1, characterized in that: The thickness of the cell heat insulation layer (1) is 1.5–3.5 mm. Double-sided adhesive (8) is provided on both sides of the cell heat insulation layer (1) to bond the cell heat insulation layer (1) to the cell (4).
3. A lithium battery cell module with an integrated thermal runaway protection structure according to claim 1, characterized in that: The pressure relief valve fireproof sticker (5) includes a polymorphic silicon material plate (51), and an insulating encapsulation layer (52) is wrapped around the outside of the polymorphic silicon material plate (51). The lower surface of the insulating encapsulation layer (52) is pasted to the upper surface of the battery cell module.