CN202840545U

CN202840545U - All-day real-time active energy equalization system

Info

Publication number: CN202840545U
Application number: CN 201220168345
Authority: CN
Inventors: 孙勇
Original assignee: SHANGHAI FOUNDING NEW ENERGY TECHNOLOGY Co Ltd
Current assignee: SHANGHAI FOUNDING NEW ENERGY TECHNOLOGY Co Ltd
Priority date: 2012-04-19
Filing date: 2012-04-19
Publication date: 2013-03-27
Anticipated expiration: 2022-04-19

Abstract

The utility model discloses an all-day real-time active energy equalization system, which is composed of a battery voltage detecting circuit, equalization switches, equalization resistors, a battery group and a central processor. The processor can communicate with the voltage detecting circuit. The voltage detecting circuit is connected with each equalization switch, and the equalization switch is connected with one equalization resistor and the battery group. When the central processor detects that the voltage difference between a certain battery and the battery in a lowest voltage among the batteries reaches a certain value, and the voltage of the battery is higher than an equalization starting voltage, an equalization circuit of the battery is started, so that superfluous electricity of the battery is released via the equalization resistor; and when the voltage difference between the battery and the battery in the lowest voltage is less than the equalization closing voltage difference, the equalization circuit of the battery is switched off, and equalization is stopped. According to the utility model, equalization on the battery group can be carried out in all day, thereby reducing the inconformity of the battery group.

Description

A kind of round-the-clock real-time active energy equalizing system

Technical field

The utility model belongs to the battery management system field, relates to a kind of round-the-clock real-time active energy equalizing system.

Background technology

Along with the development of society, use lithium battery more and more extensive as the application of power, the employing lithium batteries such as electric automobile, electric motorcycle, electronic vista car, back power supply occur in succession as the product of its power output.In numerous application, all need lithium battery to use in groups, rather than realized by a single batteries.The configurable like this battery pack that goes out different voltages, different capabilities, different output power is to satisfy various applied environment demand.

After lithium battery uses in groups, just unavoidably can run into the inconsistent problem of each batteries capacity in the battery pack, this problem is the difference by the material in the battery production process, production technology, and the difference of battery pack environment for use produces.When the lithium battery group was used, the situations such as over-charging of battery, mistake are put in order to avoid, excess temperature occured, and usually understand the matching battery baffle and use together.The effect of baffle is all cell voltages of monitoring, when a certain batteries voltage is lower than set point, closes battery power discharge; When certain batteries voltage is higher than set point, close batteries charging.Also has a very important function in the baffle; be exactly balanced, after certain batteries voltage is higher than balanced cut-in voltage, will open the equalizer switch of this batteries; discharge the part energy of this batteries by equalizing resistance, thereby make all battery capacities consistent as far as possible.There is following shortcoming in this balanced way: (1) can only be in charging, and charging is about to complete the time, balanced just unlatching, and the time is very short.(2) because time for balance is short, reach good portfolio effect, just need very large euqalizing current, discharge as soon as possible the unnecessary capacity of this batteries.Larger euqalizing current can produce larger heat, and the common radiating condition of battery pack environment for use is bad, has so just limited the size of euqalizing current, can't obtain good portfolio effect for the application scenario of the larger equalizing circuit of needs.

The utility model content

The utility model provides a kind of round-the-clock real-time active energy equalizing system.

The utility model provides a kind of round-the-clock real-time active energy equalizing system, described system by equalizer switch, equalizing resistance, battery pack, can detect the voltage detecting circuit of battery voltage information and open or close equalizer switch and realize the central processor CPU of the balanced control of each batteries of battery pack is formed;

Described middle central processing unit links to each other with battery voltage detection circuit;

Described battery voltage detection circuit links to each other with equalizer switch, equalizing resistance and battery pack.

Described round-the-clock real-time active energy equalizing system, the voltage difference that is detected between the battery that voltage is minimum in certain batteries voltage and all batteries by central processing unit reaches some values, and this batteries voltage is higher than balanced starting resistor, then open the equalizing circuit of this batteries, discharge the electric weight of this batteries by equalizing resistance, close voltage difference when this batteries voltage and lowest section cell voltage difference less than equilibrium, then close the equalizing circuit of this batteries, stop equilibrium.Because the central processing unit round-the-clock running, therefore, can realize round-the-clock battery pack being carried out equilibrium in 24 hours, with less euqalizing current, obtain to be equivalent to the effect of large current balance.

Use round-the-clock real-time active energy equalizing system of the present utility model, can round-the-clockly carry out equilibrium to battery pack, reach the effect of large current balance with less euqalizing current, the heating problem of having avoided large current balance to follow has improved balanced range of application greatly.Especially for the application of the large current balance of needs, has great advantage.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, does not consist of to improper restriction of the present utility model, in the accompanying drawings:

A kind of round-the-clock real-time active energy equalizing system structure chart that Fig. 1 provides for the utility model.

Embodiment

Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to restriction of the present utility model.

Embodiment 1:

A kind of round-the-clock real-time active energy equalizing system that Fig. 1 provides for the utility model, this system by equalizer switch, equalizing resistance, battery pack, can detect the voltage detecting circuit of battery voltage information and open or close equalizer switch and realize the central processor CPU of the balanced control of each batteries of battery pack is formed;

As can be seen from Figure 1, resistance R is equalizing resistance, and K is equalizer switch, and battery pack links to each other with resistance R, and equalizer switch links to each other with voltage detecting circuit, and voltage detecting circuit links to each other with central processing unit.Central processing unit is by communicating by letter with voltage detecting circuit, can obtain each batteries voltage, the economize on electricity pressure reduction that voltage is minimum in certain batteries voltage and all batteries reaches the poor V1 of balanced cut-in voltage, and this batteries voltage is higher than balanced starting resistor Von, then central processing unit is notified voltage detecting circuit, open the equalizer switch of this batteries, make this batteries discharge electric energy by equalizing resistance R.Close voltage difference V2 when this batteries voltage and lowest section voltage difference less than equilibrium, then close the equalizer switch of this batteries, stop the equilibrium of this batteries.Therefore each batteries information of voltage of the round-the-clock monitoring of central processing unit, can realize round-the-clock balancing energy.

The round-the-clock real-time active energy equalizing system of the utility model has following characteristics: (1) 24 hour round-the-clock balancing energy, time for balance are longer than the balanced way in the present baffle greatly.(2) reached the effect of large current balance with less euqalizing current, heating is few, and is simple in structure, and dependable performance is with low cost.

More than technical scheme that the utility model embodiment is provided be described in detail, used specific case herein principle and the execution mode of the utility model embodiment are set forth, the explanation of above embodiment is only applicable to help to understand the principle of the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, all will change on embodiment and range of application, in sum, this description should not be construed as restriction of the present utility model.

Claims

1. round-the-clock real-time active energy equalizing system is characterized in that: described system by equalizer switch, equalizing resistance, battery pack, can detect the voltage detecting circuit of battery voltage information and open or close equalizer switch and realize the central processor CPU of the balanced control of each batteries of battery pack is formed;