Charging and discharging apparatus and method of battery
A technology of charging and discharging device and power supply device, which is applied in battery circuit device, secondary battery charging/discharging, battery/fuel cell control device, etc., can solve problems such as unbalanced charging of battery cells, deviation of battery cell capacity, and heat generation. , to achieve the effect of reducing cost and size, and minimizing power loss
Pending Publication Date: 2021-09-24
GREEN POWER
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, due to the capacity deviation between battery cells, there is a problem of unbalanced charging between battery cells
In order to solve the above problems, there is a method of connecting a discharge circuit consisting of a resistor and a switch to each battery cell to achieve equalization among the battery cells, but this method has the disadvantage of power loss and heat generation due to resistance
It is also proposed to equip each battery unit with a charging switch connected in series and a bypass switch that short-circuits the charging switch and the battery unit to adjust the charging time and bypass time of each battery unit to balance the battery unit. It is difficult to control the problem in the constant voltage charging mode, so it has not been practical
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
[0064] The preferred embodiments of the present invention will be described in detail as follows according to the accompanying drawings. The following detailed description is exemplary only, showing only the preferred embodiment of the invention.
[0065] figure 1 It is a figure which shows the conventional secondary battery charging and discharging apparatus. If each individual battery unit is equipped with a power supply device for charging and discharging, the constant current and constant voltage of each battery unit can be controlled separately, so no additional balancing circuit is required, and in order to simultaneously charge multiple battery units The device for discharging has the following problems: since each individual battery unit is equipped with a power supply unit, a connecting cable, etc., the installation cost increases and takes up a lot of space.
[0066] As an alternative, research is under way such as image 3 Shown is a method of charging and discha...
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 present invention relates to a charging and discharging apparatus of a battery, and more particularly, to a charging and discharging apparatus of a battery capable of evenly charging respective battery cells whose charging and discharging characteristics are different from each other because capacities and internal resistances of the respective battery cells connected to each other in series do not completely coincide with each other, in an apparatus of charging and discharging a battery in which a plurality of battery cells are connected to each other in series. The charging and discharging apparatus of a battery includes: charging switches connected to respective battery cells in series; bypass switches short-circuiting both ends of the respective battery cells and the charging switches; a voltage sensor sensing voltages of the respective battery cells; a current sensor measuring a charging and discharging current; a power source providing the charging and discharging current; and a controller, and appropriately operates the charging switches and the bypass switches in a state in which a plurality of battery cells are connected to each other in series to balance the battery cells, such that a cost and loss may be reduced and rapid charging and discharging may be performed.
Description
technical field [0001] The present invention relates to a battery charge and discharge device, in particular to a device for charging and discharging a plurality of battery cells connected in series, the capacity and internal resistance of each battery cell connected in series are not completely the same, resulting in different charging and discharging performance. The characteristic battery unit can realize the battery charging and discharging device of balanced charging. Background technique [0002] Secondary batteries are used in a variety of ways such as portable electronic devices, electric vehicles, energy storage devices, and more. Recently, due to the explosive growth of electric vehicles, the demand for secondary batteries is rapidly increasing, and in order to overcome problems such as resource depletion and global environmental damage caused by fossil fuels, the demand for secondary batteries is expected to increase further in the future. Along with the increase...
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 Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/0016H02J7/0019H01M10/441Y02T10/70Y02E60/10B60L58/22H01M2010/4271H02J7/00714H02J7/007184H02J7/0024
Inventor 赵贞九姜载凤
Owner GREEN POWER