Electric vehicle power battery equalization circuit
A power battery and balancing circuit technology, applied in charge balancing circuits, battery circuit devices, electric vehicles, etc., can solve problems such as large voltage differences, high voltage of single batteries, endangering property and life safety, etc., and achieve simple and reliable circuits , improve charging and discharging efficiency, and avoid the effect of insufficient power
Inactive Publication Date: 2016-06-22
TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD
View PDF0 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] As the core of electric vehicles, batteries directly affect the driving and safety performance of electric vehicles. At present, the storage capacity and charge and discharge performance of batteries have become the bottleneck of the development of electric vehicles. As the power battery pack for driving electric vehicles, it is usually composed of multiple low-voltage The single cells are connected in series and in parallel. However, due to the differences in the production of the single cells, the voltage between the single cells may be high or low during use. If this imbalance is allowed State use will cause the voltage difference between the single cells to become larger and larger, which will eventually accelerate the capacity decay and exhaustion of the entire battery pack. What is more serious is that the long-term unbalanced use of the battery pack may cause battery damage and burnout. Even explosion, endangering property and life safety
[0003] In order to eliminate the difference between single cells, the commonly used method at present is to use battery balancing, and the method usually used for battery balancing is to connect a resistor in parallel at both ends of the single cell or battery pack, and use the resistance to consume the high voltage cells. The energy of the battery is used to achieve the purpose of battery capacity and voltage balance. Although this method can play a certain role in balancing, it uses a resistor to release the energy of a single battery with high voltage through heat, which wastes battery energy. The single battery needs to be charged additionally, the efficiency is low, and it is more complicated
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The concrete implementation method of the present invention is as follows:
[0022] Such as figure 1 Shown is a schematic structural diagram of the first embodiment of the electric vehicle power battery equalization circuit of the present invention, wherein B1, B2, ..., Bn are n single cells connected in series, and K1, K2, ..., Kn+1 are n+ 1 single-pole single-position switch, B0 is the vehicle power supply, and the single batteries B1, B2, ..., Bn are respectively connected to one end of the voltage converter through the n+1 single-pole single-position switches, and the voltage converter The other end of is connected to the vehicle power supply B0.
[0023] The battery balancing circuit also includes a controller, which is used to detect information such as the voltage and current of the single battery, and to control the connection and disconnection of the switches as a whole. The n+1 single-pole single-position switches can be electronic switches, etc. A switch ca...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
An electric vehicle power battery equalization circuit. The invention discloses a simple and efficient battery equalization circuit. The vehicle-mounted low-voltage power supply is used to store the energy of a single battery with a high voltage, to charge a single battery with a low voltage, and to use voltage conversion The device can effectively control the charging and discharging current of the single battery, and ensure the consistency of the voltage of the single battery after equalization.
Description
technical field [0001] The invention relates to a battery management circuit, in particular to an electric vehicle power battery equalization circuit. Background technique [0002] As the core of electric vehicles, batteries directly affect the driving and safety performance of electric vehicles. At present, the storage capacity and charge and discharge performance of batteries have become the bottleneck of the development of electric vehicles. As the power battery pack for driving electric vehicles, it is usually composed of multiple low-voltage The single cells are connected in series and in parallel. However, due to the differences in the production of the single cells, the voltage between the single cells may be high or low during use. If this imbalance is allowed State use will cause the voltage difference between the single cells to become larger and larger, which will eventually accelerate the capacity decay and exhaustion of the entire battery pack. What is more seri...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H02J7/00
CPCH02J7/0019
Inventor 张德星
Owner TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD