Preheating charging loss optimization battery pack charging method in low-temperature environment

A low-temperature environment and charging method technology, which is applied in the direction of secondary battery charging/discharging, secondary battery, electrochemical generator, etc., can solve the problem of not realizing the optimal management and control of loss, thermal runaway, and not considering energy loss and time consumption, etc. question

Active Publication Date: 2015-03-11
HARBIN INST OF TECH
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Problems solved by technology

In the prior art, when charging a battery pack in a low-temperature environment, the energy loss during the warm-up charging process and the time consumption of the entire warm-up charging process are not considered, so the energy consumption and time consumption during the warm-up

Method used

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  • Preheating charging loss optimization battery pack charging method in low-temperature environment
  • Preheating charging loss optimization battery pack charging method in low-temperature environment
  • Preheating charging loss optimization battery pack charging method in low-temperature environment

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specific Embodiment approach 1

[0077] Specific implementation mode one: as Figure 1~3 As shown, the realization process of a battery pack charging method for optimizing charging loss in a low-temperature environment described in this embodiment is as follows:

[0078] A battery pack charging method for optimizing preheating charging loss in a low temperature environment, the realization process of the method is as follows:

[0079] Step 1. Preheat the battery pack and determine the warm-up target temperature T of the battery pack 1 and warm-up time t heat Relationship:

[0080] Considering that part of the preheating energy is used to heat the battery pack, and the other part is transferred to the air, the energy balance equation of the battery pack preheating stage is given as:

[0081] Pdt heat =nC battery m battery dT+C air m air dT (1-1)

[0082] Where P is the power to preheat the battery pack, n is the number of batteries in the battery pack, C battery is the specific heat capacity of a sin...

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Abstract

The invention relates to a preheating charging loss optimization battery pack charging method in the low-temperature environment and in particular relates to a battery pack charging method. The preheating charging loss optimization battery pack charging method aims to optimize energy consumption of preheating process of the charging process and energy loss of charging process of a battery pack in the low-temperature environment. The preheating charging loss optimization battery pack charging method is characterized by comprising the following steps: preheating the battery pack in the low-temperature environment, so that the charging performance of the battery pack is recovered, and determining preheating target temperature and battery pack constant current charging current by utilizing a modern data optimization algorithm, taking battery preheating target temperature and battery charging current as solving quantity and taking minimum energy consumption of preheating and charging processes as a target according to the charging current and the working temperature range provided by a battery manufacturer. By utilizing the preheating charging loss optimization battery pack charging method, the low temperature service ability of the battery pack can be effectively improved.

Description

technical field [0001] The invention relates to a method for charging a battery pack. Background technique [0002] In a low-temperature environment, the charging performance of the battery pack will decrease, affecting the low-temperature operation capability of the battery pack. When the temperature is too low, charging cannot even be performed. Therefore, it is often necessary to preheat the battery pack in a low temperature environment to restore the charging performance of the battery pack. In the prior art, when charging a battery pack in a low-temperature environment, the energy loss during the warm-up charging process and the time consumption of the entire warm-up charging process are not considered, so the energy consumption and time consumption during the warm-up charging process are not controlled, and there is no Realizing the optimal management and control of loss will lead to the overheating of a single cell in the battery pack, resulting in thermal runaway du...

Claims

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Application Information

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IPC IPC(8): H01M10/44
CPCH01M10/446Y02E60/10
Inventor 朱春波孙金磊杨鹏胡宸宋凯魏国逯仁贵
Owner HARBIN INST OF TECH
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