CN2408576Y

CN2408576Y - Maintenance device for accumulator group

Info

Publication number: CN2408576Y
Application number: CN 00203932
Authority: CN
Inventors: 曹海波
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-02-16
Filing date: 2000-02-16
Publication date: 2000-11-29
Anticipated expiration: 2010-02-16

Abstract

The utility model provides a maintenance device for an accumulator group, which is provided with a charging circuit, wherein, the anode and the cathode of the charging circuit are respectively connected with the anode and the cathode of each accumulator in the accumulator group via a connecting switch; the work of the connecting switch is controlled by a computer which is provided with a voltage detecting interface for an accumulator and an output interface for a charging demand; the voltage detecting interface for the accumulator is connected with each accumulator via the connecting switch; the output interface for the charging demand is connected with a starter of a controlling switch of the charging circuit. The utility model breaks through the shortage that each accumulator in the accumulator group can not be respectively maintained; the utility model can carry out voltage adjustment on each accumulator in the accumulator group to maintain the balance of terminal voltage between accumulators to improve the operating performance of the accumulator group and to extend the life time of the accumulator group.

Description

The attending device of batteries

The utility model relates to a kind of attending device of batteries, is a kind of device of terminal voltage between each storage battery in the balance batteries.

The terminal voltage of storage battery is lower because of the restriction that is subjected to electrochemical principle, a plurality of storage batterys must be together in series to satisfy the requirement of power consumption equipment to voltage in actual applications.Because the inhomogeneities that discreteness that exists in the storage battery manufacture process and storage battery in use exist can make and produce the unbalanced phenomenon of terminal voltage, battery capacity and internal resistance between each storage battery in the batteries.This can cause in the batteries terminal voltage of indivedual storage batterys too to be lower than the terminal voltage of other storage batterys, or indivedual storage battery lost efficacy prior to whole group storage battery group, thereby can badly influence the work quality and the useful life of whole batteries.

For addressing the above problem, a kind of way is to make regular check on the terminal voltage of each storage battery in the batteries, when the terminal voltage of finding each storage battery is inhomogeneous, just adopts balanced charging method that batteries is charged.Though but this method has improved the terminal voltage of low-voltage storage battery, and normal storage battery is seriously overcharged.Simultaneously, the raising of the operating voltage of batteries can influence the operate as normal of power consumption equipment.Another kind of way is to have the storage battery of independent effect to be equipped with special-purpose charging device in the batteries certain, but it can not act on whole batteries.

At above-mentioned deficiency, the purpose of this utility model is exactly to provide a kind of terminal voltage that can make each storage battery in the batteries attending device of the batteries that can both obtain safeguarding when unusual to occur.

The attending device of batteries provided by the utility model has charging circuit, respectively has one to be connected switch and to connect between the anode of each storage battery in the positive pole of charging circuit and the batteries.Respectively there is one to be connected switch and to connect between the negative electrode of each storage battery in the negative pole of charging circuit and the batteries.Have a control charging circuit whether the control switch of path connect with charging circuit.Have and detect the control computer, the starting drive that the connection switch motion instruction output interface identical with the batteries number is arranged and be connected switch with each links.The control of maintenance computer is arranged, and its battery tension detection signal input interface links through connecting switch and each storage battery, and the starting drive of the control switch of its charging instruction output interface and charging circuit links.Connection switch that the positive and negative of same storage battery is extremely gone up is the starting drive effect that is subjected to same connection switch.

The attending device of batteries provided by the utility model, its each connection switch motion instruction output interface that detects the control computer sends action command by the formula circulation, receives the connection switch motion closure of instruction.The battery tension detection signal input interface of safeguarding the control computer is communicated with this storage battery because of connecting switch closure, safeguards that the control computer obtains the voltage signal of this storage battery.After safeguarding that the control computer compares calculating to the voltage signal that obtained and standard value, as find the terminal voltage deficiency of this storage battery, then send instruction by the charging instruction output interface to the charging circuit control switch and make its closure, charging circuit charges to this storage battery.Guarantee so to accomplish that the storage battery to each the terminal voltage deficiency in the batteries in time charges and the service behaviour of maintenance free cell group.Cause batteries to open circuit or the accumulator pole sex reversal for preventing that accumulator internal resistance is too high, the attending device of batteries provided by the utility model also has a low resistance resistance in parallel with charging circuit, and be associated with its control switch of path whether of a control with the low resistance resistance string, safeguarding has the starting drive of the control switch of path instruction output interface and low resistance resistance to link on the control computer.Like this after safeguarding that the control computer compares calculating to the voltage signal that obtained and standard value, as the terminal voltage of finding this storage battery is zero or during for negative value, just send instruction to low resistance resistance control switch and make its closure, make interim this inoperable storage battery of getting rid of from batteries by path instruction output interface.One of the little percentage that is not less than battery capacity 20 hour rates to its operating current of resistance of setting low resistance resistance (0.01C20 (subscript)), safeguard that path instruction output interface on the control computer is then regularly to the starting drive transmission path instruction of the control switch of low resistance resistance, discharge process by low resistance resistance, safeguard that the control computer calculates the internal resistance of this storage battery according to the terminal voltage situation of change of the battery discharging process that obtains from the voltage detection signal input interface, as find that the internal resistance of this storage battery unusually just instructs charging circuit that this storage battery is carried out charge maintenance.

In sum, the attending device of batteries provided by the utility model, one by one the voltage signal that obtains storage battery is analyzed by safeguarding the control computer, as the voltage of finding certain storage battery just sends maintenance instruction when undesired, by charging circuit or low resistance resistance this storage battery safeguarded.Like this, the attending device of batteries provided by the utility model can carry out the voltage adjustment to each storage battery in the batteries to keep the terminal voltage balance between each storage battery, can also reject inoperable storage battery that can damage batteries work simultaneously temporarily.

Accompanying drawing is the circuit diagram of an embodiment of the present utility model.

Further describe the attending device of batteries provided by the utility model below in conjunction with accompanying drawing.As shown in drawings, batteries A is made of 16 storage battery series connection, have one by 16 relay J 201, J202 ..., the connection switches set B that constitutes of J215, J216, each relay is a connection switch, and the fixed contact in two normally opened contacts of 16 relays is connected with the anode and cathode of 16 storage batterys respectively.Connect 16 of switches set with normally opened contact that the negative electrode of storage battery is connected in moving contact be connected to the positive pole that connects switches set with a lead, 16 of the connection switches set with normally opened contact that the anode of storage battery is connected in moving contact be connected to the negative pole of connection switches set with a lead.Connecting be connected in parallel between the both positive and negative polarity of switches set a charging circuit C and a low resistance resistance D, but having the normally opened contact of a relay J 3 to connect, having the normally opened contact of a relay J 4 to connect with low resistance resistance with charging circuit.Select for use the combination of single-chip microcomputer E (PIC16C74), F (74LS154) to finish the function that detects the control computer and safeguard the control computer.Between the both positive and negative polarity that connects switches set, connected a bleeder circuit G, safeguarded that the voltage signal input interface (No. 2 pin on the single-chip microcomputer E) of control computer links to each other with this bleeder circuit, made the voltage signal that enters computer unlikely too high.The charging instruction output interface (No. 9 pin on the single-chip microcomputer E) of safeguarding the control computer links to each other with the line bag of relay J 3 through a signal amplification circuit, safeguards that the path instruction output interface (No. 8 pin on the single-chip microcomputer 5) of control computer links to each other with the line bag of relay J 4 through a signal amplification circuit.Single-chip microcomputer F is a 4-16 decoder, and its 16 connect switch motions instruction output interfaces, promptly the 1st to No. 16 pin respectively through a signal amplification circuit and relay J 201, J202 ..., J215, J216 the line bag link to each other.4 signal input interfaces of single-chip microcomputer F link to each other with the 15th, 16,17, No. 18 pin of single-chip microcomputer E respectively.Detect 4 interfaces of control program on single-chip microcomputer E and send different signal combination to single-chip microcomputer F, single-chip microcomputer F then sends instruction according to different input signal combinations through a certain connection switch motion instruction output interface and makes the connection switch motion that is connected with this interface.A manual inspection instruction loader H and batteries status displays I on single-chip microcomputer E, have also been connected.

Claims

1, a kind of attending device of batteries has charging circuit, it is characterized in that

I. respectively there is one to be connected switch and to connect between the anode of each storage battery in the positive pole of charging circuit and the batteries;

Ii. respectively there is one to be connected switch and to connect between the negative electrode of each storage battery in the negative pole of charging circuit and the batteries;

Iii. have a control charging circuit whether the control switch of path connect with charging circuit;

Iv. have and detect the control computer, the starting drive that the connection switch motion instruction output interface identical with the batteries number is arranged and be connected switch with each links;

V., the control of maintenance computer is arranged, and its battery tension detection signal input interface links through connecting switch and each storage battery, and the starting drive of the control switch of its charging instruction output interface and charging circuit links.

2, the attending device of batteries as claimed in claim 1 is characterized in that described detection control computer and safeguards that the control computer is made of same set of computer.

3, the attending device of batteries as claimed in claim 1, it is characterized in that a low resistance resistance is in parallel with charging circuit in addition, and be associated with its control switch of path whether of a control with the low resistance resistance string, safeguarding has the starting drive of the control switch of path instruction output interface and low resistance resistance to link on the control computer.