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Electric energy transfer method and electric energy bus

A technology of electric energy transfer and electric energy, which is applied in battery circuit devices, secondary battery charging/discharging, collectors, etc., can solve the problems of electric energy loss, inconsistent discharge depth, increased weight, volume and cost, etc., to prolong life and avoid The effect of the fire hazard

Inactive Publication Date: 2015-12-23
BEIJING SAMEVOLT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Overcharging seriously affects the cycle life of the battery, and even causes a fire accident. Due to the inconsistency of the battery, the traditional series charging technology will cause some batteries to be in an overcharged state when charging the battery pack.
[0003] Excessive discharge seriously affects the cycle life of the battery. Due to the inconsistency of the battery, when the discharge of the series battery pack is terminated, the discharge depth of each single battery is inconsistent. Some of the batteries will be in an over-discharge state, and some of the batteries will still have some The available remaining power is not used, which leads to the premature scrapping of some batteries in the battery pack, and the replacement of the whole set causes the scrapping of other batteries that are still in use, resulting in waste
[0004] The system powered by the electric energy of the battery pack is increasingly equipped with various power generation equipment to increase the life time of the battery pack, such as solar power generation equipment, braking energy recovery equipment, shock absorption energy recovery equipment, etc., while in use When these power generation equipment charges the battery pack, they must first convert the output voltage of the power generation equipment to the voltage level of the battery pack and then charge the battery pack, which will cause loss of electric energy during the conversion.
[0005] For the system powered by the electric energy of the battery pack, its control part and part of the load are powered by low voltage, and an additional DC-DC converter is required to convert the high voltage of the battery pack into the low voltage required by the control system, DC-DC conversion In some low-cost systems such as electric bicycles, in order to reduce costs, the DC-DC converter is omitted, and the output voltage of the power battery pack is directly used as the speaker , lights and other auxiliary electrical equipment power supply, in which the voltage of the power battery pack is generally 36V, 48V, 60V or even 72V, far exceeding the safe voltage of the human body, and these auxiliary electrical equipment are scattered around the handlebars and the body, increasing the Electric shock risk for cyclists
[0006] The Chinese patent No. ZL201520115163.4 discloses a power transfer bus system. The patent proposes the concept of power transfer bus, but the batteries that realize power transfer are all smart batteries with their own control units. There are high requirements for weight and cost, which are limited in promotion and application

Method used

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  • Electric energy transfer method and electric energy bus
  • Electric energy transfer method and electric energy bus
  • Electric energy transfer method and electric energy bus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1, electric energy transfer between electric storage devices with potential relationship——a single cell in the same series battery pack transfers electric energy to another single cell, such as Figure 4 Shown:

[0057] The battery pack of electric vehicles, 1#~5# batteries are grouped in series, which is a mixed group of batteries with different capacities, of which 1# battery not only participates in the power supply output of the entire battery pack, but also provides additional power to the outside world through 403 and 404, of which 1# ~5# battery and DC-DC charger are respectively connected to power bus 401 and 402 through switches, and all switches are independently controlled by the superior control system;

[0058] When power transfer occurs: the control switches 405~410 are turned on, all other switches are turned off, the 1# battery is connected to the power bus 402 through the switches 405 and 406, and the input terminal of the DC-DC charger is co...

Embodiment 2

[0060] Embodiment 2, the transfer of electric energy between electric storage devices without potential relationship—two single cells connected in series transfer electric energy to two single cells connected in series in another battery pack, such as Figure 5 Shown:

[0061] The battery pack of the electric vehicle is divided into two independent battery packs, of which 1#~5# batteries are grouped in series for powering the power system, 6# and 7# batteries are grouped in series for powering the air conditioner; 1#~7# The batteries are respectively connected to the electric energy bus 501 and 502 through switches, and all switches are independently controlled by the superior control system;

[0062] When power transfer occurs: the control switches 503~508 are turned on, and all other switches are turned off. After the 6# and 7# batteries are connected in series, they are connected to the power bus 502 through the switches 503 and 504, and the input terminal of the DC-DC char...

Embodiment 3

[0064] Embodiment 3, the power generation equipment transfers electric energy to the power storage equipment, and the power generation equipment supplies power to the electrical load, such as Image 6 Shown:

[0065] The battery pack of the electric vehicle is divided into two independent battery packs, of which 1#~5# batteries are grouped in series, 6# and 7# batteries are grouped in series, 1#~7# batteries, DC-DC charger, DC load 1 and 2, and the solar battery are respectively connected to the electric energy bus 601 and 602 through switches, and all switches are independently controlled by the superior control system;

[0066] When power transfer occurs, the control switches 603~607 are turned on, and all other switches are turned off, the 4# battery is connected to the power bus 601 through switches 605 and 606, the output terminal of the solar battery is connected to the power bus 601 through the switch 603, and the solar battery The other output end is connected to the ...

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Abstract

The invention discloses an electric energy transfer method and an electric energy bus. A plurality of power supply devices and power receiving devices are respectively connected with the electric energy bus through a unified control switch, thereby achieving the controllable conversion of electric energy between the power supply devices and the power receiving devices.

Description

technical field [0001] The invention relates to the technical field of electric energy transfer. Background technique [0002] Overcharging seriously affects the cycle life of the battery, and even causes a fire accident. Due to the inconsistency of the battery, the traditional series charging technology will cause some batteries to be in an overcharged state when charging the battery pack. [0003] Excessive discharge seriously affects the cycle life of the battery. Due to the inconsistency of the battery, when the discharge of the series battery pack is terminated, the discharge depth of each single battery is inconsistent. Some of the batteries will be in an over-discharge state, and some of the batteries will still have some The available remaining power is not used, which causes some batteries in the battery pack to be scrapped prematurely, and the replacement of the whole set will cause other batteries that are still in a usable state to be scrapped together, resulting...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/44
CPCY02E60/10
Inventor 刘光辰
Owner BEIJING SAMEVOLT CO LTD
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