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Accumulator charger based on high frequency bus

A battery and charger technology, which is applied to battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as high cost, electric sparks, and inconvenient mechanical switching, and achieve high work efficiency and improved life.

Inactive Publication Date: 2007-10-10
杭州迪源电气科技有限公司
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Problems solved by technology

The problem is that the realization of this mechanical switching is not convenient: there is an electric spark, the reliability is not good, and the cost is high
[0007] 3) Each battery cell is charged independently and powered in series, but there is no balance control for discharge
Since this solution requires multiple independent power converters corresponding to the battery cells, the cost is quite high

Method used

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  • Accumulator charger based on high frequency bus
  • Accumulator charger based on high frequency bus
  • Accumulator charger based on high frequency bus

Examples

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Embodiment Construction

[0025] Embodiments are described with reference to the drawings

[0026] As shown in FIG. 1 , the schematic structure of the charger based on the high-frequency bus of the present invention is shown. Figure 2-4 is a schematic diagram of various common potential isolation schemes. The commonly used one is the transformer coupling scheme, but for high-frequency lines, capacitive isolation and piezoelectric isolation schemes in power electronics technology are also realistic and feasible options. Here, the high-frequency bus is usually single-phase, but multi-phase is not excluded. Sometimes multi-phase can transmit higher and more stable power; The module circuits are changed accordingly, using conventional multi-phase inverter and multi-phase rectifier circuits. It can be seen that the present invention integrates the primary side circuits of each charging power supply module, which greatly simplifies the circuit structure and reduces the cost. Usually one secondary side modu...

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Abstract

The charging device is in use for charging accumulator (accu) adapted to mobile electric apparatus, emergency power supply, and light-volt energy sources. The charging device is capable of carrying out independent charging management for single accu in series connected accu pack, prolonging service life remarkably. The invention is hopeful to reduce cost of charger for charging single accu independently or series connected accu. Characters of structure are that high frequency (Hf) AC switch inverter adopted by module at primary side (PS) converts DC or AC in low frequency to output Hf AC. Module at secondary side (SS) includes isolation-coupled circuit (ICC), rectification / adjustment module. Being in one from transformer, piezoelectric, or condenser couplings, ICC outputs adjustable DC suitable for charge. Through AC bus in Hf, modules at PS and SS are connected. Inputted in parallel, multiple modules at SS charge accu respectively by outputted DC potentials insulated each other.

Description

technical field [0001] The invention belongs to storage battery charging equipment, and relates to a battery charger applied to mobile electrical equipment (such as electric vehicles, electric tools, etc.), emergency power supplies, photovoltaic energy sources, and the like. Background technique [0002] The performance of batteries has always been the technical bottleneck of various mobile electrical equipment, emergency power supplies, photovoltaic power supplies and other equipment. Among them, the life of charge and discharge cycles is a key issue, which is closely related to product costs. [0003] The output voltage of the battery cells is too low, and in many cases it cannot directly meet the application requirements, and can only be connected in series to work as a battery pack. After a lot of research, it has been shown that the life of the battery pack is far lower than the life of the battery cells. The reason is that the parameters of the individual cells in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/04H02J7/00
Inventor 吕征宇
Owner 杭州迪源电气科技有限公司
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