Series-parallel connection switching device, battery pack and vehicle

A switching device and parallel connection technology, which is applied to battery pack components, secondary battery repair/maintenance, secondary battery charging/discharging, etc., can solve the problems of poor switching effect of series-parallel switching devices

Pending Publication Date: 2022-07-29
DONGFENG MOTOR GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to provide series-parallel switching of solid-state lithium batteries in two different modes of charging and working to match the voltages in two different modes of charging and working. The current series-parallel switching device has a poor switching effect

Method used

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  • Series-parallel connection switching device, battery pack and vehicle
  • Series-parallel connection switching device, battery pack and vehicle
  • Series-parallel connection switching device, battery pack and vehicle

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Embodiment Construction

[0033] In order to make the application more clearly understood by those skilled in the technical field to which the application belongs, the technical solutions of the application are described in detail below with reference to the accompanying drawings and through specific embodiments.

[0034] The solid-state lithium battery realizes the series-parallel switching of multiple battery modules in two different modes of charging and working through the series-parallel switching device to match the voltages in the two different modes of charging and working. The rotating body fits and rotates, and friction will occur between the pole lugs and the rotating body, which will lead to the wear of the pole lugs. The electrical connection between the resistor and the electrical connection position is unstable before and after switching, and there may be an open circuit problem in severe cases, resulting in the battery module not being able to be charged in the charging mode, unable to w...

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Abstract

The invention discloses a series-parallel connection switching device, a battery pack and a vehicle, and aims to solve the problem that a plurality of battery modules cannot be normally used after series-parallel connection switching, the series-parallel connection switching device comprises a rotating body and a fixed seat, and the rotating body is provided with a plurality of limiting grooves and an electric path; the plurality of limiting grooves and the electric connection positions of the electric paths are distributed at intervals along the rotating direction of the rotating body; the fixed seat is rotationally connected with the rotating body, the fixed seat is provided with a plurality of tab extending holes and a plurality of bulges, the bulges are provided with lifting surfaces, and the lifting surfaces have projection components in the axial direction of a rotating shaft of the rotating body and the rotating direction of the rotating body; and when the rotating body and the fixed seat rotate relatively, the rotating body is guided by the lifting surface to be far away from or close to the fixed seat, so that the electric connection position is separated from or electrically connected with the tab of the battery module. According to the series-parallel connection switching device provided by the invention, the service life of the tabs is prolonged, and stable electric connection of the battery module in a working mode and a charging mode is ensured.

Description

technical field [0001] The invention belongs to the technical field of battery series-parallel switching, and in particular relates to a series-parallel switching device, a battery pack and a vehicle. Background technique [0002] Solid-state lithium batteries have the characteristics of high energy density and good safety performance, and are widely used in the power source of automobiles or electric bicycles. Solid-state lithium batteries need a higher voltage platform to provide better power performance in the process of powering cars or electric bicycles; during charging, solid-state lithium batteries need to be adapted to a lower voltage (not higher than 36V) to prevent Overcharging and reducing the natural possibility of vehicle charging provide customers with safety assurance. Therefore, it is necessary to provide series-parallel switching of solid-state lithium batteries in two different modes of charging and operation to match the voltages in the two different mode...

Claims

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Application Information

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IPC IPC(8): H01M50/503H01M50/509H01M50/588H01M10/44
CPCH01M50/503H01M50/509H01M50/588H01M10/441H01M2220/20
Inventor 王彦刘敏龚钰端木凡昌胡远森
Owner DONGFENG MOTOR GRP
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