A modular battery pack that can be shot through with a needle

Abstract

The utility model provides a kind of modular battery that can be through needle gun hit, including several single batteries, aluminium bar, module end plate, steel band, composite gasket and thermal management integrated board, each single battery is arranged in parallel along horizontal direction, and is completed by aluminium bar to be connected in series and parallel and constitutes battery module, module end plate is equipped at the both ends of battery module, steel band is equipped outside battery module, steel band is used to provide clamping force to battery module, composite gasket is equipped between every two single batteries, thermal management integrated board is equipped in the bottom of battery module;The modular battery has the ability of needle gun hit, with ultrahigh safety, simple structure, compact, module specific energy is high, size is flexible, it can be conveniently arranged in different size space range, with extensive popularization and practice significance.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a modular battery pack that can be pierced by a needle gun. Background Technology

[0002] With the widespread adoption of new energy vehicles in family cars, buses, logistics vehicles, and special-purpose vehicles, they are gradually becoming mainstream products. Simultaneously, the adoption of lithium batteries in low-speed electric vehicles and electric bicycles is accelerating, and the energy storage lithium battery market is growing rapidly. As the application of lithium-ion batteries expands, fires caused by lithium battery thermal runaway are increasing, drawing widespread attention to safety, especially for batteries used in special-purpose vehicles, which require higher safety standards to ensure safety in various demanding operating conditions.

[0003] At present, improving battery safety involves two aspects: firstly, enhancing the inherent safety of individual cells through the application of new technologies such as solid-state batteries; and secondly, improving system safety through battery system combination technology. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a modular battery pack that can be pierced by a needle gun.

[0005] The technical solution adopted in this utility model is: A modular battery pack that can be pierced by a needle gun includes several individual cells 1, aluminum bars 2, module end plates 3, steel strips 4, composite gaskets 5, and a thermal management integrated plate 6. The individual cells 1 are arranged in parallel along the horizontal direction and connected in series and parallel through aluminum bars 2 to form a battery module. Module end plates 3 are provided at both ends of the battery module. The steel strip 4 is provided on the outside of the battery module to provide clamping force to the battery module. A composite gasket 5 is provided between every two individual cells 1. A thermal management integrated plate 6 is provided at the bottom of the battery module.

[0006] Preferably, in the above-mentioned modular battery pack that can be pierced by a needle gun, the aluminum bar 2 and the individual battery 1 are fixedly connected by laser welding.

[0007] Preferably, in the above-mentioned modular battery pack that can be penetrated by a needle gun, the module end plate is made of extruded aluminum alloy profile.

[0008] Preferably, in the aforementioned modular battery pack that can be penetrated by a needle gun, the bottom of the battery module is coated with thermally conductive adhesive, and the bottom of the battery module is fixed to the thermal management integrated plate 6 by bolts. The thermal management integrated plate 6 is both a thermal management plate and a structural support component. Structurally, it enables modular stacking and combination within the battery system. In terms of thermal management, in the event of thermal runaway of a single battery, the single battery comes into contact with the thermal management plate, quickly dissipating the heat generated by the single battery and preventing heat spread.

[0009] Preferably, in the above-mentioned modular battery pack that can be pierced by a needle gun, the steel strip 4 is made by strip welding process, which welds the steel strip into a rectangular ring shape, which has the characteristics of low cost and high reliability.

[0010] Preferably, in the above-mentioned modular battery pack that can be pierced by a needle gun, the number of individual battery cells 1 is 8.

[0011] Preferably, in the above-mentioned modular battery pack that can be pierced by a needle gun, the individual battery 1 is a lithium-ion battery or a sodium-ion battery.

[0012] Preferably, in the above-mentioned modular battery pack that can be pierced by a needle gun, the number of steel strips 4 is 2.

[0013] Preferably, the aforementioned modular battery pack that can be pierced by a needle gun is the smallest modular integrated unit inside the battery system, and can be stacked and combined in the X, Y, and Z directions inside the battery housing to form a battery system.

[0014] Preferably, in the modular battery pack that can be pierced by a needle gun, the composite gasket 5 has a composite structure, with a heat insulation layer made of heat insulation material in the middle and fire extinguishing layers on both sides. The fire extinguishing layers adopt microencapsulation technology to encapsulate a pollution-free green fire extinguishing agent in microcapsules and use an adhesive to make a sheet as the fire extinguishing layer. When the temperature of a single battery cell rises to a certain temperature, the fire extinguishing agent is automatically released, while the heat insulation layer in the middle blocks the heat transfer between the individual cells.

[0015] The beneficial effects of this utility model are: The aforementioned modular battery pack, which can withstand needle and gun punctures, mitigates heat transfer to adjacent cells and prevents heat accumulation when individual cells are damaged by external forces. Combined with a high-efficiency thermal management integrated board at the bottom, it can quickly dissipate heat from failed cells, improving the safety of the battery system. This modular battery pack possesses the ability to withstand needle and gun punctures, exhibiting extremely high safety. It also features a simple and compact structure, high module energy density, and flexible size, allowing for convenient placement in various spatial dimensions, making it widely applicable and practically significant. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the modular battery pack that can be pierced by a needle gun according to the present invention.

[0017] Figure 2 This is a partial structural diagram of the modular battery pack that can be pierced by a needle gun according to the present invention.

[0018] In the diagram: 1-Single cell, 2-Alcohol bar, 3-Module end plate, 4-Steel strip, 5-Composite gasket, 6-Thermal management integrated board. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 like Figure 1-2 As shown, the modular battery pack that can be pierced by a needle gun includes eight lithium-ion individual cells 1, aluminum bars 2, module end plates 3, steel strips 4, composite gaskets 5, and a thermal management integrated plate 6. The individual cells 1 are arranged in parallel along the horizontal direction and are stacked in series and parallel through the aluminum bars 2 to form a battery module. The aluminum bars 2 are fixedly connected to the individual cells 1 by laser welding. Module end plates 3 are provided at both ends of the battery module. The module end plates are made of aluminum alloy extruded profiles. The bottom of the battery module is coated with thermally conductive adhesive. The bottom of the battery module is fixed to the thermal management integrated plate 6 by bolts. The thermal management integrated plate 6 is both a thermal management plate and a structural support component. Structurally, it realizes the modular stacking combination inside the battery system. In terms of thermal management, in the event of thermal runaway of an individual cell, the individual cell contacts the thermal management plate to quickly dissipate the heat generated by the individual cell and avoid heat spread. The battery module is externally equipped with two steel strips 4. These steel strips 4 are welded into rectangular rings using a strip welding process, offering advantages such as low cost and high reliability. The steel strips are clamped using tooling to complete the assembly of the battery module. The steel strips 4 provide clamping force to the battery module. A composite gasket 5 is provided between every two individual battery cells 1. The composite gasket 5 has a composite structure: a heat-insulating layer in the middle and fire-extinguishing layers on both sides. The fire-extinguishing layers utilize microencapsulation technology, encapsulating a pollution-free, green fire-extinguishing agent within microcapsules and using an adhesive to create a sheet as the fire-extinguishing layer. When the temperature of a single battery cell rises to a certain level, the fire-extinguishing agent is automatically released, while the heat-insulating layer in the middle prevents heat transfer between the individual cells. A thermal management integrated plate 6 is located at the bottom of the battery module.

[0021] The aforementioned modular battery pack, which can be pierced by a needle gun, has a thermal management integrated board and battery modules mounted on it. These are the smallest modular integrated units within the battery system and can be stacked and combined in the X, Y, and Z directions inside the battery housing to form the battery system.

[0022] As can be seen, the aforementioned modular battery pack, which can withstand needle and gun puncture tests, slows down heat transfer to adjacent cells in the event of thermal runaway in a single cell by isolating heat between cells through composite gaskets. Combined with a thermal management system for rapid heat dissipation of individual cells, the battery pack can pass needle and gun puncture tests without catching fire or exploding, demonstrating extremely high safety. This utility model adopts a modular design, is highly versatile, and has a simple and compact structure. It can be easily arranged in spaces of different sizes, and has broad practical application significance.

[0023] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A modular battery pack that can be shot by a needle, characterized by: The battery module comprises several individual cells, aluminum busbars, module end plates, steel strips, composite gaskets, and a thermal management integrated plate. The individual cells are arranged in parallel along the horizontal direction and connected in series and parallel by aluminum busbars to form a battery module. Module end plates are provided at both ends of the battery module. A steel strip is provided on the outside of the battery module to provide clamping force. A composite gasket is provided between every two individual cells. A thermal management integrated plate is provided at the bottom of the battery module.

2. The modular battery pack that can be fired by a needle according to claim 1, characterized by: The aluminum bus and the individual battery are fixedly connected by laser welding.

3. The modular battery pack that can be fired by a needle according to claim 1, characterized by: The module end plate is made of extruded aluminum alloy profile.

4. The modular battery pack that can be fired by a needle according to claim 1, characterized by: The bottom of the battery module is coated with thermally conductive adhesive, and the bottom of the battery module is fixed to the thermal management integrated board by bolts.

5. The modular battery pack that can be fired by a needle according to claim 1, characterized by: The steel strip is welded into a rectangular ring shape using a strip welding process.

6. The modular battery pack that can be fired by a needle according to claim 1, wherein: The number of individual batteries is 8.

7. The modular battery pack that can be hit by a needle gun according to claim 1 or 6, characterized in that: The individual battery is a lithium-ion battery or a sodium-ion battery.

8. The modular battery pack that can be fired by a needle according to claim 1, wherein: The number of steel strips is 2.

9. The modular battery pack that can be fired by a needle according to claim 1, characterized by: The composite gasket has a composite structure, with a heat insulation layer made of heat insulation material in the middle and fire extinguishing layers on both sides.

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