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Automobile battery pack capable of enhancing thermal management safety based on nested lithium ion batteries

A lithium-ion battery, battery pack technology, applied in battery/fuel cell control devices, electric vehicles, battery pack components, etc., can solve the problems of low safety performance, low single energy, difficult thermal management, etc., to achieve protection and safety , High heating efficiency, uniform heating effect

Active Publication Date: 2021-02-19
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a battery pack with enhanced thermal management safety based on nested lithium-ion batteries, which solves the problems of low energy, difficult thermal management, complex systems and low safety performance of existing automotive lithium-ion battery packs question

Method used

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  • Automobile battery pack capable of enhancing thermal management safety based on nested lithium ion batteries
  • Automobile battery pack capable of enhancing thermal management safety based on nested lithium ion batteries
  • Automobile battery pack capable of enhancing thermal management safety based on nested lithium ion batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Such as Figure 1-8 As shown, the battery pack based on the enhanced thermal management safety of nested lithium-ion batteries includes an insulating casing 200, and K insulating positioning connecting plates 300 are arranged in the insulating casing along the vertical direction, and the adjacent positioning connecting plates are equally spaced, and Arranged in parallel; M rows and N columns of nested lithium-ion batteries 100 are arranged on each positioning connection plate 300 to form a lithium-ion battery matrix, and M×N lithium-ion batteries in the matrix are connected in series or in parallel to form battery pack units; each The battery pack units of the first layer can be output individually, or can be connected in series or in parallel to form a battery pack output; wherein, K, M and N are all positive integers greater than or equal to 2;

[0065] In this embodiment, four layers of positioning connecting plates are arranged in the insulating casing 200 , and a t...

Embodiment 2

[0088] In this embodiment, the electrodes of the upper pole piece 702 of the outer cell and the upper pole piece 701 of the inner core of the nested lithium-ion battery 100 are the same and are positive electrodes at the same time; the lower pole piece 801 of the inner battery core and the lower pole piece 802 of the outer battery Conducted with the shell, both are negative poles, the outer cell and the inner cell are connected in parallel through the shell.

[0089] In other embodiments, the upper pole piece of the outer cell and the upper pole piece of the inner core have the same electrode, and can be negative electrodes at the same time; the lower pole piece of the inner battery cell and the lower pole piece of the outer battery cell are connected to the outer shell, and both are positive electrodes.

[0090] In this embodiment, the inner cell electrode caps of all nested lithium-ion batteries in each battery pack unit are connected together through a current bus, and the o...

Embodiment 3

[0099] In this example, if Figure 16-18 As shown, the gap 3 between the side wall of the inner cylinder of the nested lithium-ion battery and the secondary outer wall of the outer cylinder is filled with a thermally conductive material 9 . The purpose of filling the heat-conducting material 9 is to enable the heat conduction between the cells in the outer cell box. This kind of battery is not suitable for assembly in a battery pack that often works in a high temperature environment, but is very suitable for assembly in a battery pack that often works in a low temperature environment. environment in the battery pack.

[0100] In a low temperature environment, the temperature of the battery is too low when it is used, which will easily lead to a significant decline in battery performance, and it will easily shorten the battery life and reduce battery stability in the long run. Ion batteries are different. When it is first started, only the inner battery cell 201 is used for w...

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Abstract

The invention discloses an automobile battery pack capable of enhancing thermal management safety based on nested lithium ion batteries. The battery pack comprises an insulating shell, K insulating positioning connecting plates are arranged in the insulating shell along the vertical direction, and M rows and N columns of nested lithium ion batteries are arranged on each layer of positioning connecting plate to form battery pack units; each battery pack unit can independently output and can also be connected in series or in parallel to form a battery pack for output; the nested lithium ion battery comprises a metal shell and a battery cell filling the shell, the shell comprises an inner cylinder and an outer cylinder, the inner cylinder is located in a through hole in the center of the outer cylinder, and a gap exists between the side wall of the inner cylinder and the secondary outer wall of the outer cylinder. The battery cell comprises an outer battery cell and an inner battery cell.Based on the characteristics of the nested lithium ion battery, through reasonable heat pipe design, air duct design and grouping scheme, the internal thermal management performance of the battery pack is enhanced, the temperature of each battery can be detected on the premise of controlling the number of temperature sensors as much as possible, and the reliability and fineness of temperature monitoring are improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery packs, and in particular relates to an automotive battery pack with enhanced thermal management safety based on nested lithium-ion batteries. Background technique [0002] Due to its own properties, lithium-ion batteries are prone to heat accumulation during charging, discharging and use. These heat will cause the temperature of the battery to rise during operation, which will reduce the working performance and safety of the battery, especially when the lithium-ion battery is used for electric When the power source of the car, due to the dense stacking of batteries and the difficulty of heat conduction, it is more likely to cause the temperature inside the battery pack to continue to rise and the temperature to be uneven. The continuous rise in temperature will lead to a decrease in the stability of the battery, which in turn will cause the battery to experience thermal runaway. lead t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/058H01M50/244H01M50/242H01M50/213H01M50/249H01M50/258H01M50/507H01M10/613H01M10/615H01M10/617H01M10/625H01M10/635H01M10/6556H01M10/6557H01M10/6563H01M10/6567H01M10/6568B60L50/64
CPCH01M10/0525H01M10/058H01M10/613H01M10/615H01M10/617H01M10/625H01M10/635H01M10/6556H01M10/6557H01M10/6563H01M10/6567H01M10/6568B60L50/64H01M2220/20Y02T10/70Y02E60/10Y02P70/50B60L58/26B60L2240/545H01M10/658H01M50/209H01M10/486H01M50/502H01M50/507H01M50/509
Inventor 王志荣白金龙
Owner NANJING TECH UNIV
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