Mixedly marshaled battery pack and mixed marshaling method of battery pack

Abstract

The invention discloses a mixedly marshaled battery pack and a mixed marshaling method of the battery pack. According to the mixedly marshaled battery pack, batteries of different capacities are connected in series or in series and in parallel in a mixed marshaling manner, or multiple batteries of same capacity are connected in series and in parallel in a mixed marshaling manner, the rated capacities of corresponding batteries (packs) of unit voltage in the whole marshaled battery pack are not completely same, and power supply leads are arranged at two ends of the batteries (packs) with relatively high capacities and are capable of supplying power outsides, so that a group of battery packs with integrated voltage can be provided for supplying power outsides, and one or multiple groups of auxiliary power supplies with voltages lower than the voltage of the battery packs are further provided for supplying power outsides. The mixedly marshaled battery pack has the beneficial effects that a DC-DC converter matched with the battery pack can be omitted, so that the electric energy loss in a voltage conversion process is avoided, meanwhile, the weight, the size and the cost of a system is reduced, and the reliability of the system is improved; the mixedly marshaled battery pack is convenient to maintain and safe to use.

Description

technical field [0001] The invention relates to the technical field of battery packs, in particular to a series or series-parallel hybrid battery pack and a battery pack grouping method. Background technique [0002] When grouping traditional battery packs, whether it is a battery pack grouped in series or mixed in series and parallel, in order to minimize the impact of inconsistency between batteries on the life of the battery pack, the manufacturer recommends using the same brand, same model, same batch, capacity The same battery group is used, that is, the battery (group) capacity corresponding to the unit voltage in the entire battery group is the same after grouping. Moreover, after the traditional battery packs are grouped, they only provide a set of power sources whose power supply voltage is the voltage of the battery packs to supply power to the outside world. [0003] High voltage is one of the characteristics of battery packs. In some applications such as electri...

AI Technical Summary

Problems solved by technology

In the entire system that the battery pack is responsible for power supply, there are often electrical equipment with different rated voltages, such as the motor and motor controller of the power system on an electric vehicle with a rated voltage of several hundred volts, while the peripheral auxiliary electronic equipment such as instruments / headlights The rated voltage of / turn signal / horn / ECU / air conditioner / electric window / sunroof / wiper / power steering pump / ABS / airbag is only 12V, which requires the installation of a DC-DC converter to convert the high The voltage is converted into the low voltage required by the auxiliary electrical equipment, and the DC-DC converter not only increases the size, weight, and cost, but also has low conversion efficiency, which also causes additional loss of precious battery pack power, and one more possible failure point, reducing system reliability

[0004] In some other applications such as electric bicycles or electric tricycles, the voltage of the power battery pack has voltage levels of 36 volts, 48 ​​volts, and 60 volts. For the sake of cost saving and other factors, the auxiliary power of these electric bicycles or electric tricycles Electrical equipment such as instruments / horns / car lights / central locks often do not use DC-DC converters but directly use the output voltage of the power battery pack to supply power. The output voltage of the power battery pack has exceeded the safe voltage of the human body, and these The peripheral auxiliary electrical equipment is scattered around the handlebars and the body, which increases the risk of electric shock for the rider and may endanger the personal safety of the rider

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