High-frequency pulse type balance charger for power battery pack
A power battery pack and balanced charging technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of single cell undercharging, single cell overcharging, and failure to reach this voltage.
Inactive Publication Date: 2014-02-19
HARBIN ZHIMU TECH
View PDF5 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] At present, the conventional battery pack charger generally uses a charger to charge the battery pack in series. Since the battery pack is composed of multiple single cells in series, there are inevitably individual differences between the single cells, and the way of series charging Although it is simple and fast, as the charging proceeds, some single cells must reach the highest charging voltage, while other single cells have not reached this voltage. If you continue to charge the battery pack, it will inevitably cause some single cells to charge. If the battery cells are overcharged, if the total voltage reaches the rated charging voltage, and some of the single cells have not reached the maximum charging voltage, the charger will stop working, which will inevitably lead to undercharging of individual single cells. Therefore, Individual cells in the battery pack are overcharged or undercharged for a long time, resulting in severe polarization of the individual cells, which affects the performance and service life of the battery pack
[0003] Recently, people have paid more and more attention to the research on the balanced charging of battery packs, and some methods of balanced charging have been proposed one after another. However, the methods proposed so far are all based on constant current power supply or constant voltage power supply. The electrochemical behavior in the electrolyte is different, and the influence of the power wave type on various electrochemical reaction processes is also different. The current commonly used DC charging mode has not the best influence on the electrochemical reaction process. Through practical summary, The invention proposes a high-frequency pulse type power battery pack equalization charger
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
[0018] Reference attached figure 1 ;
[0019] 1. The switch control module (2) is realized by IR2153 chip and its typical circuit, and the output rectifier diode pair tube 1 (8-1A, 8-1B) ~ output rectifier diode pair tube N (8-nA, 8-nB) adopts MBR2045 Schottky diode, single cell 1 (9-1) ~ single cell N (9-n) adopt lithium iron phosphate battery;
[0020] 2. The AC input terminal (1) is connected to the AC power supply, and the 310V DC power supply is output after the rectification diode (7) and the filter capacitor (5);
[0021] 3. The 310V DC power supply provides working power for the IR2153 chip through the current limiting resistor (6), and the IR2153 chip outputs a 60KHz PWM switching signal to control the operation of the switching tube (4);
[0022] 4. The primary coil of the switching transformer (3) is connected to the control switch tube (4), and the pulsating current flowing through the primary coil of the switching transformer (3) is transmitted to the secondar...
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
The invention relates to a high-frequency pulse type balance charger for a power battery pack. According to different battery materials and different electrolytes, different frequencies of pulse power supplies are selected to carry out balance charging on the battery pack; and a high-frequency pulse power supply which matches the electrochemical reaction process of batteries charges the batteries. Balance charging is completed, while the electrochemical performance of each single electric core is improved in a consistent manner, thereby enabling the consistency of the battery pack to be better.
Description
technical field [0001] The invention relates to an equalizing charger for a high-frequency pulse type power battery pack, which belongs to the field of battery chargers. Background technique [0002] At present, the conventional battery pack charger generally uses a charger to charge the battery pack in series. Since the battery pack is composed of multiple single cells in series, there are inevitably individual differences between the single cells, and the way of series charging Although it is simple and fast, as the charging proceeds, some single cells must reach the highest charging voltage, while other single cells have not reached this voltage. If you continue to charge the battery pack, it will inevitably cause some single cells to charge. If the battery cells are overcharged, if the total voltage reaches the rated charging voltage, and some of the single cells have not reached the maximum charging voltage, the charger will stop working, which will inevitably lead to ...
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
Inventor 李金录范金荣
Owner HARBIN ZHIMU TECH