Lithium battery group for new energy automobile

Abstract

The invention relates to the technical field of new energy power auxiliary devices, in particular relates to a lithium battery group for a new energy automobile, and aims to achieve uniform heat radiation of multiple groups of batteries, prolong the service lives of the batteries, in addition prevent connecting part loosening caused by external collision of the multiple groups of the batteries, and improve use reliability. The lithium battery group comprises a protection shell, a first charge head, a first protection circuit board as well as a plurality groups of heat conduction pieces, two groups of heat radiation fans, a transverse pull rod, an upper top plate, a lower top plate, an upper bottom plate, a lower bottom plate, two groups of first threaded rods, two groups of second threadedrods, two groups of first screw nuts and two groups of second screw nuts, wherein a plurality groups of batteries are serially connected; an upper air outlet and a lower air outlet are respectively formed in the upper end and the lower end of the outer wall of the right side of the protection shell; input ends of the two groups of the heat radiation fans are both communicated with the upper air outlet and the lower air outlet; first damping springs are mounted; rubber damping pads are arranged between both the upper top plate and the lower bottom plate and the upper bottom plate and the lowerbottom plate.

Description

technical field [0001] The invention relates to the technical field of power accessories of new energy vehicles, in particular to a lithium battery pack for new energy vehicles. Background technique [0002] As we all know, the form of energy and environmental protection is becoming increasingly tense, and batteries are becoming more and more popular as power sources. Lithium batteries for new energy vehicles have gradually become new due to their significant advantages such as high energy density, small size, light weight, environmental protection, no pollution, and no memory effect. The first choice in the energy field, the lithium battery for new energy vehicles is an accessory device used in electric vehicles for electric energy transmission to better realize vehicle power transmission. It is used in the fields of electric energy storage and new energy vehicle power supply It has been widely used; the existing lithium battery pack for new energy vehicles includes a prote...

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Problems solved by technology

[0002] As we all know, the form of energy and environmental protection is becoming increasingly tense, and batteries are becoming more and more popular as power sources. Lithium batteries for new energy vehicles have gradually become new due to their significant advantages such as high energy density, small size, light weight, environmental protection, no pollution, and no memory effect. The first choice in the energy field, the lithium battery for new energy vehicles is an accessory device used in electric vehicles for electric energy transmission to better realize vehicle power transmission. It is used in the fields of electric energy storage and new energy vehicle power supply It has been widely used; the existing lithium battery pack for new energy vehicles includes a protective case, a first charging head and a first protective circuit board, a working chamber is arranged in the protective case, and multiple groups of batteries are arranged in sequence in the working chamber. And multiple sets of batteries are connected in series, multiple sets of batteries are provided with a first thermal switch and a first alarm indicator light, and multiple sets of batteries are electrically connected to the first protection circuit board through the first thermal switch, the first The charging head is installed on the left end side wall of the protective case, and the first charging head is electrically connected to the input ends of multiple sets of batteries through a transformer, and a first discharge port is also provided on the right side outer wall of the protective case, and the first discharge port is connected to the multiple battery packs. The output terminal of the battery pack is electrically connected; when the existing lithium battery pack for new energy vehicles is used, firstly, the multiple battery packs are charged through the first charging head, and then the power input line of the automobile motor is inserted into the first discharge port and the multiple battery packs. The battery packs are connected, and the electric power stored in the multiple sets of batteries can be supplied to the motor for use; the existing lithium battery packs for new energy vehicles are found to have poor heat dissipation performance. When multiple sets of batteries are working, each battery The difference in temperature will lead to inconsistency among the batteries, which will affect the service life of the battery pack; and when multiple sets of batteries are impacted by external forces, it will easily lead to loosening of the connection parts, which will affect the output performance of the battery pack and reduce the reliability of use.

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