CN201054018Y

CN201054018Y - Intelligent accumulator capacity test instrument

Info

Publication number: CN201054018Y
Application number: CNU2007200126908U
Authority: CN
Inventors: 王树华
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-12
Filing date: 2007-06-12
Publication date: 2008-04-30
Anticipated expiration: 2017-06-12

Abstract

The utility model relates to an intelligent instrument for testing battery capacity and consists of detecting voltage signal input ends, load ends, a power circuit, a difference amplifying circuit, a filter circuit, an A/D converting circuit and a singlechip computer. A voice prompt circuit, a printer and a display screen are respectively connected with the output port of the singlechip computer. A memory of the internal resistance-capacity curve, the memory of which is based on the type and the specification of the storage battery, and a keyboard used for inputting the type and the specification of the storage battery are additionally connected with the input port of the singlechip computer. The utility model is characterized in that a signal sensor composed of an idle/load converting switch and a fixed load is connected between the two load ends, the fixed load is of a milliohm grade, and an idle/load deciding circuit is connected between the voltage signal detecting input ends. The utility model has the advantages that the structure is simple, the operation is convenient, the bulk is small, the weight is light, the carrying is convenient, the measuring precision is high and the performance is reliable. The utility model is suitable for an AC-free on-site measurement, testing the capacity of various types of storage batteries and preventing the storage battery from being discarded as useless ahead of time.

Description

The intelligent battery capacity tester

Technical field

The utility model is particularly related to a kind of intelligent battery capacity tester.

Background technology

Accumulator has been widely used in each sciemtifec and technical sphere of the national economic development such as military affairs, industry, agricultural because of its low cost of manufacture, big, the cheap inherent characteristic of capacity.The electric weight that accumulator can be exported is called accumulator capacity, and capacity is an important parameter of weighing accumulator quality.Accumulator adopts " electric discharge " measuring capacity mostly when maintenance at present." electric discharge " is to shift reciprocity principle according to storage battery energy, will put in order group storage battery serial connection " tunable load " electric weight has been put, and then the electric weight of emitting all is used for accumulator is charged.Accumulator can return to the state before the discharge fully.At this moment the calculating accumulator electric weight of emitting is accumulator capacity, and this measuring method has following problem:

1, Measuring Time is long: time of every measurement promptly is the charge and discharge time, about more than 20 hours.

2, measurement is inaccurate, can't determine whether to be full of electricity and the state that returns to fully before discharging through the accumulator after measuring, so it is inaccurate that method is measured, make the repair quality of accumulator low, do not reach the accumulator in serviceable life in a large number and scrap, seriously jeopardize the safe operation that accumulator is the various device of power supply.

3, measure inconvenience, during measurement, must carry out charge and discharge to whole group storage battery, charge and discharge equipment is huge, therefore can not measure easily whenever and wherever possible.

The utility model content

The purpose of this utility model is to solve the problems referred to above that prior art exists, provide a kind of simple in structure, volume is little, easy to operate, dependable performance, the fast accurate intelligent battery capacity tester of measurement.

Technical solution of the present utility model is: comprise detectable voltage signals input end and load end, and power circuit, differential amplifier circuit, filtering circuit, A/D change-over circuit and single-chip microcomputer, on the delivery outlet of single-chip microcomputer, be connected to voice warning circuit respectively, printer, display screen, be connected to the keyboard that is used for importing accumulator model and specification in the input port of single-chip microcomputer, its special character is: be connected to the signal transducer that is made of sky/load transfer switch and dead load between two load ends, described dead load is the milliohm level, between the detectable voltage signals input end, be connected to sky/load judgment circuit, also be connected to the memory of internal memory in the input port of single-chip microcomputer according to the internal resistance-capacity curve of accumulator model and specification foundation.

Above-mentioned intelligent battery capacity tester, described power circuit are to be made of automatic charger, direct supply and power shortage holding circuit, to realize power shortage monitoring and protection, constant current, the automatic charge function of pressure limiting.

Above-mentioned intelligent battery capacity tester, described A/D converter are seniority ∑-Δ A/D converter, with number of significant digit and the precision of further guaranteeing accumulator internal resistance.

Above-mentioned intelligent battery capacity tester, described signal transducer is by handle, copper skeleton, polyamide skeleton, is arranged on the switch lower substrate on the polyamide skeleton, the middle part is provided with matrix on the switch insulation body of through hole and the switch, with the sensor probe of switch insulation body by being threaded, be fixed on dead load on the switch lower substrate, be connected the load wire formation on the copper skeleton, so that processing, easy to operate, make between sensor probe and ShiShimonoseki lower substrate to face contacts, guarantee safe and reliable.

The utility model has the advantages that simple in structure, volume is little, easy to operate, dependable performance, the measuring accuracy height, adopt " internal resistance-capacity curve method " and high precision milliohm level dead load, guarantee the number of significant digit and the precision of accumulator internal resistance, be input to internal resistance-capacity curve in the memory in advance, pass through no-load voltage, load voltage and discharge current, and potential circuit and current return are separately, thereby accurately gather closed circuit voltage, guarantee the precision of internal resistance measurement, by the single-chip microcomputer logic determines, data processing and computation of table lookup, calculate the internal resistance of accumulator accurately, parameters such as capacity are judged the accumulator quality state accurately; This accumulator capacity tester has sky/load transfer, judgement, and voice, text prompt function improve measuring accuracy; Be adapted at not having the in-site measurement of interchange, adapt to dissimilar battery capacity measurings, revise " internal resistance-capacity curve " and change dead load by keyboard, adapt to the open type of acidity, alkalescence of different model, specification and the measurement of non-maintaining enclosed accumulator, can prevent that accumulator from scrapping in advance.

Description of drawings

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is a signal transducer structural representation among Fig. 1.

Embodiment

As shown in the figure, this intelligent battery capacity tester has two detectable voltage signals input end A1, A and load end B1, B2, and power circuit 11, differential amplifier circuit 2, filtering circuit 3, seniority ∑-Δ A/D converter 4 and single-chip microcomputer 5, on the delivery outlet of single-chip microcomputer 5, be connected to voice warning circuit 6 respectively, printer 9, LCD display 8, also be connected to the memory 7 of internal memory according to the internal resistance-capacity curve of accumulator model and specification foundation in the input port of single-chip microcomputer 5, be used to import the keyboard 10 of accumulator model and specification, at two load end B1, be connected to the signal transducer 1 that constitutes by sky/load transfer K switch and dead load 105 between the B2, described dead load 105 is the milliohm level, at detectable voltage signals input end A1, be connected between the A2 current-limiting resistance and by single-chip microcomputer 5 provide+sky/load judgment circuit 12 that the 5V power supply constitutes.Described power circuit 11 is to be made of automatic charger 1101, direct supply 1102 and power shortage holding circuit 1103, to realize power shortage monitoring and protection, constant current, the automatic charge function of pressure limiting.Described signal transducer 1 is by handle 101, copper skeleton 107, be connected the load wire 108 on the copper skeleton 107, polyamide skeleton 106, be arranged on the switch lower substrate 104 on the polyamide skeleton 106, the middle part is provided with matrix 102 on the switch insulation body 103 of through hole and the switch, constitute by sensor probe 101 that is threaded and the dead load 105 that is fixed on the switch lower substrate 104 with switch insulation body 103, wherein between handle 101 and the copper skeleton 107, between polyamide skeleton 106 and the copper skeleton 107, between switch lower substrate 104 and the polyamide skeleton 106, between switch insulation body 103 and the switch lower substrate 104, on the switch between matrix 102 and the switch insulation body 103 respectively by being threaded, so that processing, and easy to operate, make between sensor probe 101 and ShiShimonoseki lower substrate 104 to contact for face.

During use, sensor probe 101 and load wire 109 are connected to the both positive and negative polarity of tested accumulator, gather every measured signal, sensor probe 101 is screwed out or screws in, make it to disconnect or closure with switch lower substrate 104, dead load 105 is disconnected or closure, sky/load judgment circuit 12 output high level or low level judgement signals, make detectable voltage signals input end A1, A2 output no-load voltage or load voltage and discharge current, the measured signal of gathering is through difference discharge circuit 2, filtering circuit 3, A/D change-over circuit 4, carry out logic determines by single-chip microcomputer 5 then, data processing and tabling look-up, accurately calculate the internal resistance of accumulator, parameters such as capacity, judge the accumulator quality state exactly, show and print every measured parameter by LCD 8 and mini-printer 9.According to different batteries model, specification, replaceable dead load 105, and by the corresponding accumulator model of keyboard 10 inputs, specification, test again.

Claims

1. intelligent battery capacity tester, comprise detectable voltage signals input end and load end, and power circuit, differential amplifier circuit, filtering circuit, A/D change-over circuit and single-chip microcomputer, on the delivery outlet of single-chip microcomputer, be connected to voice warning circuit respectively, printer, display screen, be connected to the keyboard that is used for importing accumulator model and specification in the input port of single-chip microcomputer, its special character is: be connected to the signal transducer that is made of sky/load transfer switch and dead load between two load ends, described dead load is the milliohm level, between the detectable voltage signals input end, be connected to sky/load judgment circuit, also be connected to the memory of internal memory in the input port of single-chip microcomputer according to the internal resistance-capacity curve of accumulator model and specification foundation.

2. intelligent battery capacity tester according to claim 1 is characterized in that: described power circuit is to be made of automatic charger, direct supply and power shortage holding circuit.

3. intelligent battery capacity tester according to claim 1, it is characterized in that: described signal transducer is by handle, copper skeleton, polyamide skeleton, is arranged on the switch lower substrate on the polyamide skeleton, the middle part is provided with matrix on the switch insulation body of through hole and the switch, with the sensor probe of switch insulation body by being threaded, be fixed on the dead load on the switch lower substrate, the load wire that is connected on the copper skeleton constitutes.