Power distribution method and device for power battery of electric vehicle, and electric vehicle

A power battery and distribution method technology, which is applied in battery/fuel cell control devices, electrical devices, electric vehicles, etc., can solve problems such as being difficult to be detected, so as to prolong the service life, extend the cruising range and service life, and ensure The effect of continuing to work normally

Inactive Publication Date: 2019-06-14
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that it is difficult to be detected when a single battery in the power battery fails in the prior art, so as to provide a system that can be detected in time when a single battery fails. An electric vehicle power battery, and a power distribution method and device for the electric vehicle power battery, and the electric vehicle

Method used

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  • Power distribution method and device for power battery of electric vehicle, and electric vehicle
  • Power distribution method and device for power battery of electric vehicle, and electric vehicle
  • Power distribution method and device for power battery of electric vehicle, and electric vehicle

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Embodiment 1

[0068] This embodiment provides a power distribution method for the power battery of an electric vehicle, wherein the structure of the power battery of the electric vehicle is as follows: figure 2 As shown, it includes: at least two series-connected battery packs, each series-connected battery pack includes a plurality of single cells and at least one controllable switch, the plurality of single cells are connected in series with the at least one controllable switch; the series battery packs are connected in parallel .

[0069] Specifically, the controllable switch can be a high-voltage contactor, which can accurately and conveniently realize the above-mentioned functions of the controllable switch. The electric vehicle power battery in this embodiment is connected in series and then in parallel. Therefore, when a single battery in a series battery pack fails, the current corresponding to the series battery pack is collected and the single battery in the series battery pack is co...

Embodiment 2

[0089] This embodiment provides a power distribution device for an electric vehicle power battery, wherein the structure of the electric vehicle power battery is as figure 2 As shown, it includes: at least two series-connected battery packs, each series-connected battery pack includes a plurality of single cells and at least one controllable switch, the plurality of single cells are connected in series with the at least one controllable switch; the series battery packs are connected in parallel .

[0090] Power distribution devices such as Figure 7 As shown, it includes: a number determination unit 1, a first current determination unit 2, a second current determination unit 3, a total output power determination unit 4, an overrun determination unit 5, and a protection unit 6. among them:

[0091] The number judging unit 1 is used to judge the number of series battery packs currently in working state.

[0092] The first current determining unit 2 is connected to the number judging ...

Embodiment 3

[0099] This embodiment provides an electric vehicle, including an electric vehicle power battery. The electric vehicle power battery includes: at least two series-connected battery packs, each of the series-connected battery packs includes a plurality of single cells and at least one controllable switch, The plurality of single cells are connected in series with the at least one controllable switch, and the series battery packs are connected in parallel.

[0100] The electric vehicle also includes the power distribution device in Embodiment 2 for power distribution to the power battery of the electric vehicle.

[0101] In the electric vehicle in this embodiment, the output power of the power battery of the electric vehicle is controlled through a power distribution device. The corresponding power allocation method is determined according to the actual working state of the electric vehicle power battery during the operation of the vehicle, and the output power of the electric vehicl...

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Abstract

The invention provides a power distribution method and device of an electric vehicle power battery and an electric vehicle. The electric vehicle power battery comprises at least two serially connected battery packs mutually connected in parallel. The power distribution method comprises the steps that the number of the serially connected battery packs in a working state currently is judged; if the number of the serially connected battery packs in the working state currently is one, the total maximum discharging current of the electric vehicle power battery is determined according to the maximum discharging current of the serially connected battery pack in the working state currently; if the number of the serially connected battery packs in the working state currently is at least two, the total maximum discharging current of the electric vehicle power battery is determined according to the discharging balance situation of the serially connected battery packs in the working state currently and total maximum discharging currents of the serially connected battery packs; the total output power of the electric vehicle power battery is determined according to the total maximum discharging current. The output power of the electric vehicle power battery can be reasonably allocated and effectively utilized.

Description

Technical field [0001] The present invention relates to the technical field of power batteries, in particular to a power distribution method and device for power batteries of electric vehicles, and electric vehicles. Background technique [0002] There are various ills in the currently commonly used fuel vehicles. Statistics show that under road conditions that account for more than 80%, a fuel vehicle uses only 40% of its power potential. In urban areas, it will drop to 25%, which is more serious. It is polluting the environment with exhaust gas. Since the 1990s, there have been increasing calls for improving the environment in countries around the world, and various electric vehicles have come to the fore, such as electric cars, electric trains, and electric bicycles. Although people generally believe that the future is the world of electric vehicles, battery technology issues hinder the application of electric vehicles. [0003] The structure of the battery management system i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00B60L58/10
CPCY02T10/70
Inventor 赵祥日闫丽娟
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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