CN2170516Y

CN2170516Y - Wall-through welding spot detector for battery

Info

Publication number: CN2170516Y
Application number: CN 93237288
Authority: CN
Inventors: 洪逸鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-19
Filing date: 1993-07-19
Publication date: 1994-06-29
Anticipated expiration: 2003-07-19

Abstract

The utility model relates to a wall-through welding spot detector for accumulators, which can detect the quality of the wall-through welding spots of a plastic shell lead-acid accumulator. The wall-through welding spot detector is composed of a power supply circuit, a measuring circuit, an acoustic-optic warning circuit and a test clamp specially designed, wherein, the power supply circuit not only is mutually connected with the test clamp for outputting test current, but also is mutually connected with the measuring circuit and the acoustic-optic warning circuit for providing operating current. The test current and the signal input end of the measuring circuit are loaded at the two ends of a measured welding spot through one test clamp. Because direct correlation exists between the shearing intensity of the welding spot and the resistance of the welding spot, the welding quality can be judged by the device. The device has the characteristics of convenient operation and reliable performance.

Description

Wall-through welding spot detector for battery

The utility model relates to a kind of device that can detect starting lead acid battery through-wall welding quality of welding spot.

Present domestic starting lead acid battery has replaced traditional rubber jar battery by the plastic housing battery, yet the quality of plastic housing battery through-wall welding is determining the reliability and the life-span of accumulator, and through-wall welding inferior can cause battery initial failure.Therefore require in accumulator production process, to adopt the strict quality program.Common way is to utilize mechanical shearing strength detection welding quality at present, adopts this method need do destructive control test, exists many drawbacks.

The purpose of this utility model is, utilizes the characteristic that exists direct mutual relationship between the resistance of shear resistance and solder joint, and a kind of pick-up unit that detects the through-wall welding quality that reaches by measuring resistance is provided.

For achieving the above object, the utility model is by power circuit, detect clamp, metering circuit and sound light alarming circuit are formed, power circuit had both been exported the DC experiment electric current, it is again metering circuit, sound light alarming circuit provides working current, the signal input part of test current and metering circuit all is carried in tested solder joint two ends by a detection clamp, when invariable test current passes through the solder joint two ends, metering circuit is measured the size that the solder joint both end voltage is fallen, judge the quality of through-wall welding point and sound light alarming circuit is exported in this pressure drop with this, sound light alarming circuit is reported to the police under the defective situation of quality of welding spot.

The quality that the utility model is simple in structure, easy to operate, dependable performance, the size by changing test current and switching electricity time can be detected different model specification accumulator through-wall welding solder joint.

Accompanying drawing 1 is the utility model embodiment electrical schematic diagram.

Accompanying drawing 2 is test clip wrench structure synoptic diagram among the utility model embodiment.

Below in conjunction with accompanying drawing, introduce a most preferred embodiment of the present utility model.

In the present embodiment, power circuit by fuse (RD), switch (K), contactor (C1) (C2), voltage stabilizer (WL), pressure regulator (TY), transformer (KB), transformer (ZLB), rectifier (ZL), voltage table (V), reometer (A) form (referring to accompanying drawing 1); Metering circuit is made up of milivoltmeter (mV), millivolt amplifier (MVF), and sound light alarming circuit (FM) is made up of bulb and loudspeaker; Test clamp (referring to accompanying drawing 2) has the grip fulcrum of two bakelite handles (1) handle to be connect by a bolt (3), a metal spring (2) is equipped with at the handle rear portion, the anterior inboard of two handles respectively have a metal contact (9) this to metal contact and couple of conductor (5) by pair of screws (6) fixed connection on handle, the anterior front and back of two handles is fixed a pair of tube seat (8) respectively by screw, a copper probe (10) is installed in each tube seat but these probes easy on and off in tube seat moves, and certain pressure is arranged, copper probe tail end is connected with lead (7) and is connected to metering circuit, one Metallic rod (4) is arranged between metal contact and pivot bolt, one of this bar embeds in the one handle, the other end is inserted in another handle of certain depth hole slot, this bar is to be used for the tension force of balancing spring, and the metal contact of avoiding testing clamp is not being collided under the user mode.

The working power of present embodiment is 50Hz, 220V, and the output test electric current can steplessly be adjusted in 50～1000A scope.In accompanying drawing 1, contactor C1 is subjected to the control by normally open push button switch (play button) and normally closed push button switch institute's built-up circuits such as (stop buttons), contactor C2 is subjected to the control of another state selecting switch circuit (manual, automatic), when being in auto state, this circuit C2 that can automatically switch, and the time interval of switching is adjustable as required.The concrete use operation steps of present embodiment is: energized, turn on the power switch (K), state selecting switch is pushed manual position, the power supply capstan is transferred to minimum position, be about to pressure regulator (TY) sliding contact and transfer to minimum point, to export soldering turret and clamp a lead bullion welding rod, form the short circuit of output contact, press play button, connect C1 and regulate the electric current capstan, make short-circuit current reach desirable value A, press stop button, disconnect C1.At this moment a pair of copper probe touching on the pole plate bus-bar of tested solder joint two ends tightly respectively arranged before and after the clamp.This moment, press play button again, the electric current indication reaches the A value, the voltage drop value of the voltage table indication this moment solder joint of surveying.As the voltage drop value of measuring exceeds setting value, be that solder joint is defective, millivolt amplifier is with the test signal conversion and control actuating of relay in addition, make light and sound equipment send warning simultaneously, can avoid the testing staff should operate clamp like this, range estimation is indicated and the indicated voltage drop value of milivoltmeter again, like this, be easy to generate on the one hand mistake, on the other hand also fatiguability of eyes.

Claims

1, a kind of accumulator through-wall welding solder joint detector, it is characterized in that: it is made up of power circuit, detection clamp, metering circuit and sound light alarming circuit, power circuit both was connected with the detection clamp, the output test electric current, be connected with metering circuit, sound light alarming circuit again, working current is provided, and the signal input part of test current and metering circuit all is carried in the solder joint two ends of surveying by a detection clamp.

2, accumulator through-wall welding solder joint detector according to claim 1, it is characterized in that: the test clamp has two bakelite handles, the grip fulcrum of two handles is by a bolted on connection, a metal spring is equipped with at the handle rear portion, respectively there is a metal contact two anterior inboards of handle, this is connected with a pair of lead that flows through test current by screw to metal contact, the anterior front and back of two handles also is separately installed with a pair of tube seat by screw, each plug-in mounting is gone into a metal probe in each tube seat, but these probes easy on and off in tube seat moves, and certain pressure is arranged, these probe tail ends are connected with lead, this is connected to the metering circuit input end to lead, at two handles middle part is that a metallic carrier rod is arranged between metal contact and the pivot bolt, and one of this push rod is mounted in the one handle, and the other end of this push rod can be inserted in the hole slot of another handle, this push rod is to be used for balancing spring tension force, avoids metal contact not colliding under the user mode.