Voltage balance repairing circuit and method for lithium battery pack
A technology for voltage balancing and repairing circuits, which is applied in battery circuit devices, secondary battery charging/discharging, secondary battery repair/maintenance, etc.
Pending Publication Date: 2019-05-21
屈海强
View PDF0 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a lithium battery pack voltage balance repair circuit and repair method, which can be used for lithium battery packs whose electrical performance has declined due to cell voltage differences without disassembling and replacing the cell structure. In the case of high-precision automatic repair of pressure difference, the repair process saves time and effort, and does not require too much human intervention
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
[0023] The present invention will be described below in conjunction with the accompanying drawings and specific examples. The schematic examples here are only used to explain the present invention more clearly, and are not intended to limit the application of the present invention.
[0024] attached figure 1 , as a schematic block diagram of the circuit of the present invention, a lithium battery pack voltage balance repair circuit includes a main control MCU unit connected to a digital display screen, control buttons, and a cooling fan. The main control MCU unit is connected to the total voltage measurement circuit of the battery pack, the total voltage measurement circuit is connected to the total voltage measurement switching circuit, the total voltage measurement circuit is connected to the total discharge interface, and the total discharge interface is connected to the battery pack, the voltage gear switching circuit and the discharge The resistor, the discharge resistor ...
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 discloses a voltage balance repairing circuit and method for a lithium battery pack. The repairing circuit comprises a main control MCU unit connected with a digital display screen, a control button and a cooling fan, wherein the main control MCU unit is connected with a total voltage measuring circuit of the battery pack and a single-string battery voltage measuring circuit, the total voltage measuring circuit is connected with a total voltage measuring switching circuit and a total discharge interface, the total discharging interface is connected to the battery pack, a voltagegear switching circuit and a discharge resistor, and the discharge resistor is connected to the total discharge circuit. The single-string battery voltage measuring circuit is connected with a plurality of relay switching circuits, and each relay has a single-string battery discharging circuit in parallel. Each string of discharge circuits is connected with a low voltage detection circuit, and thelow voltage detection circuit and the single-string discharge circuits are connected to a cable socket interface. By the plug connection between the cable socket interface and the cable plug of the battery pack, balance charging is performed after the discharge is completed to achieve balance repair.
Description
technical field [0001] The invention relates to the technical field of circuits related to lithium battery packs, in particular to a lithium battery pack voltage balance repair circuit and a repair method. Background technique [0002] Lithium battery packs are composed of multiple strings of cells connected in series and in parallel, which requires high consistency of the cells. Although the manufacturer has paired the cells, the lithium battery pack cannot be used for a long time. The voltage of each string of batteries will be inconsistent, which will affect the overall charging and discharging capabilities of the battery pack, resulting in a decrease in the output energy to the battery pack, which will also affect the service life of the battery pack. The maintenance methods for the voltage difference of lithium battery packs on the market are to use DC power supply to directly charge the battery cells with low voltage. Such repairs are time-consuming and labor-intensive...
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): H01M10/42H01M10/44H02J7/00
CPCY02E60/10
Inventor 屈海强
Owner 屈海强