Battery pack preheating method and system thereof

A battery pack and preheating technology, which is applied in the field of power electronics, can solve the problems of reducing the mass/volume ratio energy and mass/volume ratio power of the battery pack, local temperature fine-tuning, and complex design, etc., so as to be beneficial to engineering and product The effects of modernization, reliable and practical use value, and shortened heating time

Active Publication Date: 2016-02-24
SAIC GENERAL MOTORS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the design of this technical solution is complicated, and it is impossible to fine-tune the local temperature according to the temperature distribution of the battery pack, resulting in a large temperature difference between the single cells
On the other hand, this technical solution has high cost and poor versatility, and the heat conduction efficiency of medium heat transfer is low, resulting in low energy utilization rate
Another technical solution uses a resonant circuit to improve the energy utilization efficiency of the battery. However, this technical solution will reduce the mass / volume ratio energy and mass / volume ratio power of the entire battery pack, and at resonance, the current and voltage will be compared. Large ripples will affect the stable operation of the circuit, and will shorten the service life of the battery pack when recharging with a large pulse current

Method used

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  • Battery pack preheating method and system thereof
  • Battery pack preheating method and system thereof

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Embodiment Construction

[0011] The drawings show by way of illustrations specific details in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. These embodiments may be practiced with a lesser degree of these specific details, and structural, logical, and functional changes may be made in these embodiments without departing from the scope of the present invention. These embodiments are not necessarily mutually exclusive, as, depending on the particular application, features of one embodiment can be combined with features of another embodiment to form new embodiments. In the following description, for the sake of brevity, only elements / components closely related to the present invention are described.

[0012] figure 1 is a schematic diagram of a system for preheating a battery pack according to an embodiment of the present invention. As shown in the figure, the battery pack is composed of single c...

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Abstract

The invention provides a batter pack preheating method and a system thereof. According to an embodiment of the invention, the battery pack preheating method comprises the following steps: one or more single cells of a battery pack is/are selected to form a discharging module; the discharging module is coupled to an input end of a DC/DC module; and an output end of the DC/DC module is coupled to a charging module of the battery pack, and the charging module preheats the battery pack through discharging.

Description

technical field [0001] The invention belongs to the field of power electronics, in particular to a method and system for preheating a battery pack. Background technique [0002] In order to allow hybrid electric vehicles or pure electric vehicles using rechargeable batteries to work normally in low temperature environments, it is usually necessary to preheat the rechargeable batteries so that the volume / mass ratio power and volume of the rechargeable batteries in low temperature environments / Mass specific energy, charging performance and other parameters meet the requirements of the vehicle. [0003] In the prior art, the preheating of the rechargeable battery is usually achieved by means of heater heating and medium heat transfer. However, the design of this technical solution is complicated, and local temperature fine-tuning cannot be performed according to the temperature distribution of the battery pack, resulting in a larger temperature difference between the single c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/615H01M10/44H01M10/625H02J7/00
CPCY02E60/10
Inventor 杨建军
Owner SAIC GENERAL MOTORS
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