Battery pack and method of controlling charge-and-discharge of battery pack by its thermoelectric property

A battery pack and controller technology, applied in secondary battery charging/discharging, battery continuous discharge, battery circuit devices, etc., can solve problems such as increasing costs

Active Publication Date: 2013-05-29
KYMCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of controlling battery temperature starts with the temperature control method of heat dissipation, which requires active thermal management, so it needs to increase the cost of making a heat dissipation system

Method used

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  • Battery pack and method of controlling charge-and-discharge of battery pack by its thermoelectric property
  • Battery pack and method of controlling charge-and-discharge of battery pack by its thermoelectric property
  • Battery pack and method of controlling charge-and-discharge of battery pack by its thermoelectric property

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Embodiment Construction

[0038] The battery pack is composed of many single cells. When the ambient temperature and the heat dissipation of the battery pack are different due to the installation location and operating conditions of the battery pack, the batteries inside the battery pack will face unequal environmental heat flow conditions, resulting in uneven warm situation occurs, such as figure 1 shown. suppose figure 1 The battery pack 100 has operating temperatures in three temperature ranges 102a, 102b and 102c when discharging. The total temperature difference in all temperature range zones 102a-c is, for example, within 20°C; and the temperature difference in each temperature range zone 102a-c is, for example, within 5°C. Even if the characteristics of the batteries inside the battery pack 100 are similar, they will change due to different temperatures, for example, the internal resistance of the batteries will be different.

[0039] The above-mentioned uneven temperature effect of the batte...

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PUM

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Abstract

A battery pack and a method for controlling charge-and-discharge of the battery pack by its thermoelectric property are provided, in which the battery pack has a plurality of thermal regions divided by different ranges of temperature. The battery pack includes a plurality of parallel-connected battery groups and a plurality of variable resistances. The parallel-connected battery groups are located in the thermal regions respectively, and each of the parallel-connected battery groups includes batteries connected in parallel. The variable resistances are disposed between two parallel-connected battery groups.

Description

technical field [0001] The present invention relates to a battery pack control method (control algorithm), and in particular to a battery pack and a pseudo-isothermal design (Pseudo-isothermal Design) control method for the battery pack. Background technique [0002] Batteries are welded in series and parallel to form a battery pack. With different assembly methods and different heat dissipation environments, the temperature uniformity of the batteries will be poorer due to the greater number of batteries. If this phenomenon cannot be suppressed, the slightly damaged battery will age faster, and the original good battery cells will also be damaged early due to the damaged battery, which is why the life of the battery pack is much longer than that of a single battery. The reason why the battery life is poor, especially the battery pack with larger capacity is more likely to encounter this risk of damage. [0003] Therefore, allowing individual batteries in the battery pack t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/50H01M10/44H02J7/00
CPCY02E60/12H02J7/00H02J2007/0067H01M10/5008H02J7/0016H01M10/443H02J7/0091H01M10/5036H01M10/617H01M10/651H02J7/0025Y02E60/10H02J7/007192
Inventor 梁世豪彭裕民凌守弘周崇仁孙建中戴椿河
Owner KYMCO
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