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Battery pack equalization system and equalization method for electric vehicles

An electric vehicle and equalization system technology, applied in the field of vehicles, can solve the problems of uncontrollable module-to-module consistency, undesigned module balance, etc., to ensure consistency and maintainability, reduce technical costs, and reduce costs Effect

Active Publication Date: 2017-10-20
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For active equalization, if the balance between the monomer and the module is only achieved, and the balance between the modules is not designed, the consistency between the modules will be uncontrollable under certain circumstances.

Method used

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  • Battery pack equalization system and equalization method for electric vehicles
  • Battery pack equalization system and equalization method for electric vehicles
  • Battery pack equalization system and equalization method for electric vehicles

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0037] A battery pack equalization system and a battery pack equalization method for an electric vehicle according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0038] First, a battery pack balancing system for an electric vehicle according to an embodiment of the present invention will be described.

[0039] figure 1 is a schematic diagram of a battery pack balancing system for an electric vehicle according to an embodiment of the present invention, such as figur...

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Abstract

The invention discloses a battery pack balance system of an electric automobile. The system comprises a battery pack, an external auxiliary balance module, a voltage collection module, m balance modules and a control module. The battery pack comprises m battery modules, and each battery module comprises n single batteries, wherein m is larger than or equal to 2, and n is larger than or equal to 2. The voltage collection module collects the voltage of the single batteries of each battery module. Each balance control module comprises a first control switch, a DC / DC conversion unit and a second control switch. The control module obtains the voltage of each battery module according to the voltage of the single batteries in the corresponding battery module and controls the external auxiliary balance module, the first control switch and the second control switch to balance a battery pack according to the voltage of the battery modules and the voltage of the single batteries. The battery pack balance system can ensure uniformity and maintainability of the battery pack, and is low in cost. The invention further discloses a battery pack balance method.

Description

technical field [0001] The invention belongs to the technical field of vehicles, and in particular relates to a battery pack equalization system for an electric vehicle and a battery pack equalization method for an electric vehicle. Background technique [0002] In pure electric vehicles, the consistency of the battery pack, that is, the balance, is closely related to the performance and service life of the battery, and is one of the end-point concerns in this field. In order to ensure the balance of the battery, at present, the following measures can generally be taken to achieve: [0003] 1. Manual maintenance through regular unpacking; [0004] 2. Adopt online battery system passive equalization technology; [0005] 3. Adopt online battery system active balancing technology. [0006] Among them, for the active equalization technology, there are mainly active equalization technology from monomer to monomer, active equalization technology from monomer to module (one-way / ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18
CPCY02T10/70Y02T10/72
Inventor 胡凡郭志强秦兴权
Owner BEIJING ELECTRIC VEHICLE
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