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Lithium -ion battery small heat pump thermal management system and its application

A technology of lithium ion battery and thermal management system, applied in the field of small heat pump thermal management system of lithium ion battery, can solve the problems of low temperature and high temperature performance degradation of lithium battery, and achieve the effect of prolonging service life, light weight and small volume

Active Publication Date: 2016-10-05
张宇擎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low-temperature and high-temperature performance degradation of lithium batteries in the background art, and in order to ensure the stable operation of lithium batteries within the operating temperature range,

Method used

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  • Lithium -ion battery small heat pump thermal management system and its application
  • Lithium -ion battery small heat pump thermal management system and its application
  • Lithium -ion battery small heat pump thermal management system and its application

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0024] attached figure 1 Shown is a schematic diagram of the connection structure of the thermal management system for summer cooling.

[0025] The thermal management system of the small lithium-ion battery heat pump consists of a small heat pump, a lithium-ion battery box 6, and a fan 3. The lithium-ion battery 8 is placed in the lithium-ion battery box 7. The small heat pump is mainly composed of a condenser 1, an evaporator 4, and a small compressor. 2. The expansion valve is composed of 5 components, figure 1 It is a refrigeration cycle system composed according to the demand for cooling in summer. The connection structure of the refrigeration cycle system is: the condenser 1 is connected to the expansion valve 5, the other end of the expansion valve 5 is connected to the evaporator 4, and the evaporator 4 is connected to the small compressor 2 , the small compressor 2 is connected with the condenser 1 to form a summer refrigeration system, and the summer refrigeration sy...

Embodiment 1

[0034] Example 1: Thermal management of energy storage batteries for small solar and wind power generation systems:

[0035] Lithium batteries are used as energy storage devices for small solar and wind power generation systems. During the application process, the charge and discharge controller issues instructions according to the state of the system. When the power generation is less than the power consumption, the power is converted into alternating current through the inverter All the power is supplied to the load, and the insufficient part is provided by the discharge of the battery pack. The electric energy in the battery pack is supplied to the load through the charge-discharge controller and the inverter. Load, the remaining electric energy is supplied to the battery pack, and when the battery is fully charged, the excess electric energy is consumed through the unloader. During the operation of the power generation system, a small heat pump system is used to control th...

Embodiment 2

[0036] Example 2: Thermal management of batteries in electric vehicle power battery charging and discharging system:

[0037] Pure electric vehicles and hybrid vehicles driven by lithium-ion batteries 8 use a small heat pump system to manage the heat of the lithium battery pack 8 during charging and discharging in low-temperature and high-temperature environments. The heating cycle is used in winter and the cooling cycle is used in summer to achieve the best working range of the lithium battery's working temperature between 20°C and 45°C.

[0038] The device of the small heat pump of the present invention and the lithium battery pack are commercially available products.

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Abstract

A thermal management system for a small lithium-ion battery heat pump and its application, including a small heat pump, a lithium-ion battery box, and a fan. The lithium-ion battery is placed in the lithium-ion battery box. The machine is connected with the condenser and the evaporator, and the condenser and the evaporator are respectively connected with the expansion valve to form a complete refrigeration or heating circulation system, and the circulation system is connected with the lithium-ion battery box. This system is applied to the summer heat dissipation and winter heat preservation system of lithium-ion batteries. The small heat pump system only consumes a small amount of electricity, and obtains about 3 to 4 times the heat and cooling capacity of the input power, ensuring that the lithium battery can reach the best state in the working temperature range. The system is applied to wind energy, solar power generation systems and electric vehicle power battery systems, which can achieve multiple effects such as prolonging the service life of batteries, reducing environmental pollution, and improving system operating efficiency, and has high promotion and application value.

Description

technical field [0001] The invention relates to the fields of lithium ion batteries and small heat pumps. Specifically, it is a thermal management system of a lithium-ion battery small heat pump and its application. Background technique [0002] At present, energy shortage and environmental pollution are bottlenecks restricting the rapid development of the national economy. The development and utilization of new energy is an important measure to deal with energy shortages, environmental pollution, climate change and other issues. It is also conducive to improving my country's energy structure and enhancing the international competitiveness of my country's energy industry. Power battery is one of the core components of new energy power generation, and lithium-ion battery has better comprehensive performance compared with other secondary batteries. Lithium-ion battery has a broad application prospect as an energy storage battery. [0003] At present, the operating temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/613H01M10/615H01M10/6564
CPCH01M2220/20Y02E60/10
Inventor 张宇擎李海英贾永丽赵冬梅张丹王洪利张贵杰姬爱民史建慧
Owner 张宇擎