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Heat preservation method and heat preservation device for lithium battery at low temperature

A heat preservation device and lithium battery technology, which is applied in the field of battery charging and discharging, can solve the problems of lithium-ion battery low-temperature charging difficulties, etc., and achieve the effects of solving low-temperature charging difficulties, good conductivity, and high heating efficiency

Pending Publication Date: 2017-05-10
天津宝坻紫荆创新研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a method for heat preservation of lithium batteries at low temperatures to solve the problem of difficulty in charging lithium-ion batteries at low temperatures

Method used

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  • Heat preservation method and heat preservation device for lithium battery at low temperature
  • Heat preservation method and heat preservation device for lithium battery at low temperature
  • Heat preservation method and heat preservation device for lithium battery at low temperature

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Embodiment Construction

[0029] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0030] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be interpreted...

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Abstract

The invention provides a heat preservation method and heat preservation device for a lithium battery at a low temperature. An intelligent temperature control system detects an environmental temperature of the lithium battery and sets an upper limit value and a lower limit value of the temperature; when the environmental temperature of the lithium battery is lower than the lower limit value, the intelligent temperature control system heats a heating layer of the lithium battery in an electric heating manner; and when the environmental temperature of the lithium battery reaches the upper limit value, the intelligent temperature control system stops heating the heating layer of the lithium battery, so that the temperature of the lithium battery is kept in a set range, and normal charging and discharging in an external environment at the low temperature are achieved. According to the heat preservation method and the heat preservation device for the lithium battery at the low temperature, the internal environmental temperature of the lithium battery can be detected and regulated in real time, so that the lithium battery can achieve normal charging and discharging functions in the external environment at the relatively low temperature, the application range is expanded and the enterprise competitiveness is strengthened.

Description

technical field [0001] The invention belongs to the field of battery charge and discharge, and in particular relates to a method and a heat preservation device for a lithium battery at low temperature. Background technique [0002] Lithium-ion battery is a kind of secondary battery (rechargeable battery), which is widely used in the power supply of daily electronic products due to its excellent performance. Its applicable temperature is -20℃~40℃. The actual discharge performance of lithium batteries at low temperatures is far lower than that at room temperature, and it decreases as the temperature drops. Generally, at -20°C, the discharge capacity is only 10% to 20% of that at room temperature, and at -30°C, the discharge capacity is only about 2%. At the same time, the low-temperature charging process of lithium batteries can easily lead to the precipitation of lithium ions on the negative electrode, resulting in lithium metal crystallization, that is, the phenomenon of "...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/63H01M10/615H01M10/052
CPCH01M10/052H01M10/615H01M10/63Y02E60/10
Inventor 易汉平韩永明张志刚
Owner 天津宝坻紫荆创新研究院
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