Forklift lithium battery pack parallel topological structure and charging and discharging control method
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A lithium battery pack and topological structure technology, applied in the field of forklift lithium battery pack parallel topology, can solve problems such as poor use effect, increased battery pack differences, and unbalanced charge and discharge, etc., to achieve convenient group matching and battery charge and discharge Balanced, low production cost effect
Active Publication Date: 2021-03-16
安徽和鼎机电设备有限公司
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[0003] The purpose of the present invention is to solve the difference in capacity, internal resistance, voltage, etc. between batteries in the prior art, the difference between battery packs will gradually increase during parallel use, and the effect of traditional battery charge and discharge control Not good, can not balance the shortcomings of charge and discharge, and proposed a parallel topology of forklift lithium battery pack and charge and discharge control method
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[0039]Next, the technical solutions in the embodiments of the present invention will be apparent from the embodiment of the present invention, and it is clearly described, and it is understood that the described embodiments are merely embodiments of the present invention, not all of the embodiments.
[0040]ReferFigure 1-3A parallel structure of a forklift lithium battery pack, including high pressure box, one battery box, 2 battery box, high pressure box with two battery positive interfaces, two battery negative interface, two charging positive interface, two parallel connection Charging negative interface, two charging communication ports, a discharge positive interface, a discharge negative interface, a single vehicle communication port, two parallel connected discharge relays, two parallel connection charging relays, two parallel connection fuses, DCDC The module, the first battery box is connected to one of the battery positive interface, the first battery box negative electrode i...
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Abstract
The invention relates to the technical field of forklift lithium batteries, particularly to a forklift lithium battery pack parallel topological structure, which comprises a high-voltage box, a firstbattery box and a second battery box, wherein the high-voltage box is provided with two battery positive interfaces, two battery negative interfaces, two charging positive interfaces, two charging negative interfaces connected in parallel, two charging communication ports, a discharging negative interface, a whole vehicle communication port, two discharging relays connected in parallel, two charging relays connected in parallel, two fuses connected in parallel and a DCDC module. According to the invention, a mode of first parallel connection, then series connection and then parallel connectionis adopted, and the control logic is adopted, so that forklift battery charging and discharging are more balanced, the difference between battery packs is reduced, only one set of management system is needed, the production cost is low, the system control logic is relatively simple, wiring is safe, the unbalanced sparking phenomenon does not exist, use is flexible and convenient, and large-current charging can be achieved; and by adopting the control method, the charging and discharging of the battery are more balanced.
Description
Technical field[0001]The present invention relates to the technical field of forklium cells, and more particularly to a forklium lithium battery pack parallel topologies.Background technique[0002]During the development of industrial vehicles, the battery capacity requires more and more diverse, and the monomer battery capacity is 1 or 2 and cannot meet the operating requirements, so it is necessary to use a parallel structure to increase the battery pack capacity. However, due to the difference in capacity, internal resistance, voltage, etc. between the batteries, the difference between the battery packs during parallel use will gradually increase. At the same time, the traditional battery charge and discharge control is not good, and it is not possible to equal the charge.Inventive content[0003]It is an object of the present invention to solve differences in the prior art due to capacity, internal resistance, and voltages, etc., during parallel use, during which the battery packs w...
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