Circuit capable of achieving safe and free parallel connection of high-capacity battery pack

Abstract

The invention provides a circuit capable of achieving safe and free parallel connection of a high-capacity battery pack. The circuit comprises a positive electrode of an external charge-discharge interface, a negative electrode of the external charge-discharge interface and at least one UPS battery pack module, each UPS battery pack module comprises a battery pack and a DC-UPS module, the positiveelectrode of each battery pack is connected with the positive electrode of the external charge-discharge interface, the negative electrode of each battery pack is connected with one end of the DC-UPSmodule, the other end of the DC-UPS module is connected with the negative electrode of the external charge-discharge interface, the DC-UPS module comprises a diode, a constant-pressure constant-current module and a diode pack, the diode and the constant-pressure constant-current module are in series connection with each other and then in parallel connection with the diode pack, and the diode packis composed of a plurality of diodes in parallel connection with one another in a same direction. The circuit capable of achieving the safe and free parallel connection of the high-capacity battery pack has the advantages that the problem that each battery pack is not safe due to inconsistent initial voltages is solved, then the technical problem of high-capacity battery pack parallel connectioncapacity expansion is solved, thereby the modularization and standardization of the high-capacity battery pack are achieved, and the free replacement or capacity expansion of the new-energy electrombile battery pack is greatly promoted in technology.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a circuit of a large-capacity safe free parallel battery pack, which can realize the large-capacity safe free parallel connection of the battery pack. Background technique [0002] In today's era, the pollution of the environment by traditional cars and the exploitation of the earth's oil resources have made human beings worry about the future. Environmental protection has risen to a high degree of global and national attention. New energy vehicles have become a major development trend. Recently, Volkswagen, Mercedes-Benz, BMW, Volvo, etc. have all released development plans for new energy vehicles. At the same time, Germany, the Netherlands, the United Kingdom and France have all officially announced timetables for ending the sale of internal combustion engine vehicles. The Ministry of Industry and Information Technology of my country has begun to study and formula...

AI Technical Summary

Problems solved by technology

[0004] 1) The battery life is low. At present, most new energy vehicles can only be loaded with a capacity of about 20 degrees, and the battery life is about 200 kilometers;

[0005] 2) The construction cost of charging stations is too high, and a charging station country needs to invest tens of millions;

[0007] 4) The land occupation cost of the charging station is too high, and the throughput rate is very low; the construction of a charging station requires a large area for cars to park, and it takes at least 2-10 hours to be fully charged; there is no doubt that although the cost of electricity is low, the land, high time cost

[0008] 5) The production cost of new energy vehicles is too high. A new energy vehicle generally costs about 200,000 yuan, which is twice the cost of ordinary cars

Universal promotion is obviously not feasible, and state subsidies are too heavy to bear

[0009] 6) The aging of the battery life, generally about 3 years of operation, it is necessary to consider replacing the battery

[0010] 7) Technical difficulties:

[0044] Of course, with the increase of the power of the No. 2 and No. 3 batteries and the reduction of the No. 1 battery, the voltage difference between the two is getting smaller and smaller, and the mutual balance charging current is getting smaller and smaller, but the harmfulness of the instantaneous current above 500A is obvious. may cause security issues

Such possible situations: 1. The protection circuit produces protection, 2. The protection circuit may be damaged and the battery will be heated and damaged due to continuous charging; 3. The battery or line is overloaded and directly ignites and burns

[0045] Conclusion: It is not feasible to directly connect battery packs in parallel, which will bring inestimable serious consequences

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