Energy balance circuit for battery system
An energy balance, battery system technology, applied in charge balance circuit, battery circuit device, arrangement of multiple synchronous batteries, etc., can solve the problems of battery life damage, low energy balance efficiency, energy dissipation, etc.
Active Publication Date: 2021-07-23
河北电立方新能源科技有限公司
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Problems solved by technology
[0004] Regardless of the above-mentioned equalization circuit, it can only achieve a limited amount of energy balance, and dissipate part of the energy, which will cause certain damage to the service life of the battery, resulting in low energy balance efficiency
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[0074] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.
[0075] figure 1 It is a schematic structural diagram of an energy balance circuit of a battery system provided by an embodiment of the present invention.
[0076] Such as figure 1 As shown, an energy balance circuit of a battery system in this embodiment includes: a control module 01, a battery selection module 02, and a balance module 03, wherein the balance module 03 includes a switch unit 031 and an energy storage unit 032, and the energy storage unit 032 ...
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The invention relates to an energy balance circuit of a battery system, comprising: a control module, a battery selection module and a balance module, the balance module includes an energy storage unit and a switch unit, the enabling end of the energy storage unit is connected to the control module through the switch unit, and the battery One end of the selection module is connected to the control module, and the other end of the battery selection module is respectively connected to the energy transmission end of the energy storage unit and the switch unit. The control module obtains the voltage value of each battery in the battery system and compares the voltage of any two batteries. When the voltage difference is greater than the preset threshold, it is determined that the two batteries corresponding to the voltage difference greater than the preset threshold are balanced batteries, and the control module will balance the battery corresponding to the high voltage in the battery. The balanced energy is stored in the energy storage unit, and then the energy of the energy storage unit is distributed to the battery corresponding to the low voltage in the balanced battery, so as to realize the bidirectional balance of energy and improve the efficiency of energy balance.
Description
technical field [0001] The invention relates to the technical field of battery energy balance, in particular to an energy balance circuit of a battery system. Background technique [0002] Lithium-ion batteries have the characteristics of high energy density, light weight, and environmental protection, and their applications in the fields of new energy vehicles and electric energy storage are rapidly expanding. In a battery system, a large number of single cells are integrated in series and parallel. However, lithium-ion batteries still have some weaknesses, such as overcharge, overdischarge, and low-temperature application restrictions. The discreteness of the internal parameters of the battery and the inconsistency of the state of charge when the battery pack is composed will pose potential hazards to the use of the battery system. The battery management system is to collect, manage, and control the voltage, temperature, and charge and discharge status of all single batte...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0016
Inventor 陈冀生李计福郭蕊
Owner 河北电立方新能源科技有限公司