CN2159030Y

CN2159030Y - Multifunctional electronic load box

Info

Publication number: CN2159030Y
Application number: CN 93208940
Authority: CN
Inventors: 阎春才; 王泽文; 张国才
Original assignee: Communication Station Of Infrastructure Engineering Department Of Jidong Petroleum Exploration And Development Co
Current assignee: Communication Station Of Infrastructure Engineering Department Of Jidong Petroleum Exploration And Development Co
Priority date: 1993-04-14
Filing date: 1993-04-14
Publication date: 1994-03-16
Anticipated expiration: 2003-04-14

Abstract

A multifunctional electronic load box for the discharge load of accumulator set is suitable for 48V, 24V, 12V, 6V, 2V multiple voltages and 0-100A discharge current, and has a discharge lower limit voltage alarm, an overcurrent protector and a fan radiator.

Description

Multifunction electronic loading box

The utility model relates to a kind of discharge load of using when the accumulator testing, especially a kind of electronic load box that can be applicable to the multiple capacity battery group of multiple voltage.

At present, in the communication facilities of oil field, need the battery pack of the multiple capacity of multiple voltage, as 48V, 300AH, 500AH, 800AH; 24V, 300AH; 12V, 800AH; 2V, 195AH, 300AH, 500AH, 800AH etc., when repairing accumulator and full appearance charge-discharge test, discharge load water group load commonly used or the discharge of commercially available load box.The load of water group promptly adds sulfuric acid in water vat, though (for example 4～60V) range of current are wide by (10～100A) greatly to adapt to voltage range, but consumption acid, consumption lead are measured big, when the big electric current (100A) of high pressure (48V) discharges, produce 80～90 ℃ of high temperature in the cylinder, produce acid mist, serious environment pollution and influence operator ' s health, when the big electric current (80A) of low-voltage (2V) discharges,, cause to discharge again because of the acid solution internal resistance is big.At present commercially available load box adopts resistance wire to do load, but only is applicable to a kind of voltage, 12V case for example, and the 24V case, the 48V case if multiple voltage is arranged, then need be purchased many load boxs, not only takes up an area of but also uneconomical.

The purpose of this utility model provides a kind of load box; it can not only adapt to multiple voltage and use (for example 2V, 6V, 12V, 24V, 48V direct current), load current continuous variable (0～100A) and have additional 12V, 48V battery power discharge lower voltage limit alarm device and overcurrent protective device.

The purpose of this utility model is achieved in that for big electric current and adopts by road parallel connection or multi-channel parallel method, the discharge current on every road is limited in about 10A, so that the realization of circuit, adopt high power semi-conductor triode electron discharge circuit simultaneously, so as to have one the road or the discharge current on each road be limited in 0～10A scope adjustable continuously; Adopt the method for transistor conducting again; make when falling to a certain lower voltage limit under the sparking voltage and give the alarm; many places are provided with switch and fuse in the circuit; with each short circuit and certain road triode and puncture short along separate routes of protection; and employing dc fan; make load the temperature inside the box be no more than 60 ℃, this blower fan directly utilizes discharge current, does not need external AC power supply.

Owing to adopt such scheme, it has the technical indicator of following good effect the product (DFX-100 type) of the utility model by an embodiment:

1, working voltage grade: 2V, 6V, 12V, 24V, 48V(direct current);

2, load current ability: 0～100A;

3, ultimate bearing capacity: 5KW;

4, be provided with 12V, 48V battery power discharge lower voltage limit alarm device;

5, has overcurrent protection function;

6, the work temperature rise is no more than 60 ℃ in the case;

7, environment for use temperature-20～40 ℃.

By on it seems that the advanced usefulness more than one of the utility model structure saves floor occupying area, economic benefit is considerable.

Below in conjunction with accompanying drawing the utility model is further specified.

Fig. 1 is the electrical schematic diagram by the road parallel discharge,

Fig. 2 is the electrical schematic diagram of multichannel electronics (transistor) parallel discharge.

Fig. 3 is an embodiment circuit diagram.

Fig. 1 has illustrated that many by-passed resistor silk is by the road parallel connection, additional in addition one road high power semi-conductor triode electron discharge circuit is adjusted the method for discharge current, be example with the 48V battery pack among the figure, be provided with ten road resistance wire RF2, RF3 ... RF11, each resistance wire are 4.8 Ω, 500W, and by be connected on hand switch K2, K3 in each road ... K11 control, every access one tunnel, discharge current increase 10A, make discharge current from 10A, 20A, be increased to 100A always; The purpose that adds triode BG is the discharge current that makes in this shunt, because the adjusting of potentiometer W1 makes and is controlled in 0～10A scope, again when other is worked along separate routes, electric current reduces because accumulator battery voltage descends, recompense to keep discharge current constant with this triode branch road, so just can be controlled at discharge current arbitrarily in 0～100A scope.Because the power of each resistance wire is quite big, the circuit of Fig. 1 is applicable to the discharge load as the 48V battery pack.

Fig. 2 is a multichannel electronic semi-conductor triode parallel discharge circuit, among the figure 11 large power triode BG1, BG2 ... BG11(is the 3DD275 type for example, the peak power of every triode is 300W) the in parallel use as discharge load, every triode is born the 10A electric current at most, they are controlled by potentiometer W2 jointly, changing its conduction angle is adjusted at discharge current in 0～100A scope, each triode enlargement factor β value requires consistent as far as possible, and choose flows resistance RJ1, RJ2 ... RJ11 guarantees that the electric current of each branch road is identical.The circuit of Fig. 2 is if be used for the 48V battery pack, and then the power of each branch road will be 48V * 10A=480W, surpass the high power valve of present domestic production such as the peak power 300W of 3DD275; Certainly the method for also available increase number of branches reduces the electric current in each branch road, but because of high power valve costs an arm and a leg, this can raise the cost greatly, so the circuit of Fig. 2 is suitable as the discharge load of 2V～24V battery pack.

Fig. 3 is the circuit diagram of an embodiment of the utility model, the circuit of Fig. 1 and Fig. 2 combined among the figure, and in each triode branch road; fuse BX has connected; and at the two ends of each fuse BX, in parallel a light emitting diode D and a resistance R D are when certain branch road triode puncture short; the fuse blows on this road; make this road diode displaying, play a protective role, be provided with air master switch K in the circuit simultaneously; when whole line short or overload, can trip protection.

Also be provided with the sparking voltage lower limit alarm device of potentiometer W3, W4 control among Fig. 3, finish by the base potential of potentiometer control triode respectively.When for example scalable W3 makes 48V battery pack sparking voltage fall to lower limit 43.2V, or when regulating W4 and making 12V battery pack sparking voltage fall to lower limit 10.8V, triode BG12 or BG13 conducting, make relay J 1 or J2 action, the control contact is connected, pilot lamp or bell DL are given the alarm, and wherein K switch 12 is selector switch of high pressure group or low pressure group.

Also be provided with fan FG1 and FG2 in order to dispel the heat in the circuit of Fig. 3, K switch 13 also is the selector switch of high pressure group or low pressure group.Because the power supply of fan is taken from battery pack, thus do not need external AC power supply, but because also consumed power of fan, this part electric current counts automatically among total discharge current.

Claims

1; a kind of multifunction electronic load box; the parallel discharge circuit that it is made up of multichannel resistance wire and high power semi-conductor triode; discharge lower voltage limit warning circuit; short-circuit protection circuit and dc fan heat radiation circuit are formed; be applicable to 48V; 24V; 12V; 6V; multiple voltage grade and 0～100A discharge currents such as 2V; it is characterized in that: described load box is for the 48V electric pressure; adopt the multichannel resistance wire by the road in parallel and one road high power semi-conductor triode discharge circuit as discharge load; the access of multichannel resistance wire; control by hand switch; the triode discharge circuit adopts potentiometer to regulate the method for base potential; for 2V～24V electric pressure; adopt multi-path large power transistor parallel discharge circuit as discharge load; be subjected to same potentiometer control to change discharge current after the base stage parallel connection of multichannel triode, described two kinds of load devices are in same case.

2, multifunction electronic load box according to claim 1 is characterized in that: in described triode discharge circuit, each road all is in series with the fuse short-circuit protection circuit in parallel with light emitting diode, and each light emitting diode all is serially connected in current-limiting resistance; And be provided with a master switch and protect.

3, multifunction electronic load box according to claim 1 is characterized in that: for the discharge load of 48V and 2～24V grade, be parallel with sparking voltage lower limit warning circuit respectively, finished by the base potential of potentiometer control triode respectively.

4, multifunction electronic load box according to claim 1, it is characterized in that: the discharge load two ends are parallel with the direct current cooling fan.