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Mixedly marshaled battery pack and mixed marshaling method of battery pack

A technology of battery packs and batteries, which is applied in secondary battery manufacturing, secondary battery repair/maintenance, sustainable manufacturing/processing, etc. It can solve the problems of increasing the risk of electric shock for cyclists, power loss of battery packs, and low conversion efficiency. To achieve the effect of prolonging the discharge capacity and the overall life, avoiding power loss, and increasing the discharge capacity

Inactive Publication Date: 2015-05-20
BEIJING SAMEVOLT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Mixedly marshaled battery pack and mixed marshaling method of battery pack
  • Mixedly marshaled battery pack and mixed marshaling method of battery pack
  • Mixedly marshaled battery pack and mixed marshaling method of battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1, simulating the application of hybrid marshalling battery packs on electric bicycles, batteries of different capacities are marshalling in series, such as Figure 4 Shown:

[0067] The whole battery pack consists of three 12V12AH batteries and one 12V20AH battery in series, 8 is the main power supply battery pack, with a rated voltage and capacity of 36V12AH; 9 is an auxiliary power supply battery, with a rated voltage and capacity of 12V20AH;

[0068] 1, 2 are the power supply output terminals of the entire battery pack, which are used to supply power to the motor / motor controller; 1, 7 are auxiliary power supply outputs, which can be used to supply power to auxiliary electrical equipment such as instruments, speakers, cars, etc., etc.;

[0069] After marshalling, the rated voltage and capacity of the entire battery pack output are 48V12AH, and the rated voltage and capacity of the auxiliary power supply output are 12V8AH, which will supply the power supp...

Embodiment 2

[0070] Example 2, simulating the application of mixed marshalling battery packs on low-speed electric vehicles, batteries with different capacities are marshalled in series, and there are 2 groups of auxiliary power supply outputs after marshalling, such as Figure 5 Shown:

[0071] The whole battery pack is composed of 4 12V120AH batteries, 1 12V150AH battery and 1 12V180AH battery, a total of 6 batteries connected in series, 12 is the main power supply battery pack, the rated voltage and capacity are 48V120AH; 13 is the auxiliary power supply for the first group Battery pack, rated voltage and capacity is 24V150AH; 14 is the second set of auxiliary power supply battery, rated voltage and capacity is 12V180AH;

[0072] 1, 2 are the power supply output terminals of the entire battery pack, which are used to supply power to the motor / motor controller; 1, 11 are 24V auxiliary power supply outputs, which are used to supply power to the air conditioner; 1, 10 are 12V auxiliary pow...

Embodiment 3

[0074] Embodiment 3, simulating the application of hybrid marshalling battery packs in electric vehicles, batteries of the same capacity are connected in series and parallel in mixed marshalling, but the capacity of the whole battery pack is different on unit voltage, such as Image 6 Shown:

[0075] The whole battery pack is composed of 208 3.7V40AH batteries connected in series and parallel. 16 batteries are used as the main power supply battery pack. The 192 batteries are divided into two groups of 96 batteries connected in series and then connected in parallel. The rated voltage and capacity are 355.2V80AH; 17 are The auxiliary power supply battery pack is composed of 16 batteries divided into 4 groups of 4 batteries connected in series and then connected in parallel. The rated voltage and capacity are 14.8V160AH;

[0076] Although the entire battery pack is composed of batteries of the same capacity in this grouping method, the auxiliary power supply battery pack is conne...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/42
CPCY02E60/10Y02P70/50
Inventor 刘光辰
Owner BEIJING SAMEVOLT CO LTD
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