CN103344904B - A kind of for checking simulation lithium battery method of testing and the circuit of product charging circuit - Google Patents

A kind of for checking simulation lithium battery method of testing and the circuit of product charging circuit Download PDF

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CN103344904B
CN103344904B CN201310236106.7A CN201310236106A CN103344904B CN 103344904 B CN103344904 B CN 103344904B CN 201310236106 A CN201310236106 A CN 201310236106A CN 103344904 B CN103344904 B CN 103344904B
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circuit
test
lithium battery
voltage
current
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CN103344904A (en
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施锦才
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Fujian Landi Commercial Equipment Co Ltd
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Fujian Landi Commercial Equipment Co Ltd
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Abstract

The present invention proposes that a kind of described test circuit is made up of following structure: single chip machine controlling circuit for checking simulation lithium battery test circuit and the method for product charging circuit, control voltage configuration network and current arrangements network respectively; Voltage configuration network, it exports termination constant voltage electronic load; Current arrangements network, it connects constant voltage electronic load by constant-current circuit; Reference voltage circuit, its output terminal connects constant voltage electronic load; Circuit-under-test, its two ends, respectively by channel isolation, connect constant voltage electronic load.The present invention is improved lithium battery testing efficiency targetedly by amendment testing scheme, design test circuit etc., reduce test fittings cost, is increased battery testing reliability and stability.Meanwhile, by optimal inspection circuit, increase the compatibility of measurement system interface, reduce operator's human failure factor, improve test macro overall space utilization rate.

Description

A kind of for checking simulation lithium battery method of testing and the circuit of product charging circuit
Technical field
The present invention relates to a kind of for checking simulation lithium battery method of testing and the circuit of product charging circuit, belonging to lithium battery charging circuit application.
Background technology
At present, business machine product major part all attaches lithium battery, keeps product normally to use under being convenient to hand-held or improper power down; Accordingly, all fall to having lithium battery charging circuit in its product board, the exploitation of current product test equipment, also carries out functional test to verify its circuit correctness, reliability to this partial circuit.
In prior art: adopt external introducing lithium battery testing scheme, lithium battery specification by particular demands is inserted in the interface of test fixture (ATB), by the test thimble of signal adapting device (AB), it is docked to tested board (EUT) corresponding test circuit, tested board (EUT) system own analysis charging circuit duty, thus in order to judge charging circuit functional completeness.Test operation schematic diagram as shown in Figure 1.
The shortcoming of the scheme of prior art:
A different product configuration different model lithium battery, then need extra accessory inventory;
B different model lithium battery interface is scarcely compatible, to cause on frock test macro reserved external tapping also cannot be compatible;
The external lithium battery of C is positioned over by test macro equipment, increases unnecessary testing apparatus space, and increases lead-in wire undesirable element;
D because of lithium battery serviceable life, limit the use of condition etc., need tester to regularly replace, check or place connection error.
Summary of the invention
The invention provides a kind of for checking simulation lithium battery method of testing and the circuit of product charging circuit.
Wherein: to be a kind ofly made up of following structure: single chip machine controlling circuit for checking the simulation lithium battery test circuit of product charging circuit, control voltage configuration network and current arrangements network respectively; Constant voltage electronic load; Voltage configuration network, it exports termination constant voltage electronic load; Current arrangements network, it connects constant voltage electronic load by constant-current circuit; Reference voltage circuit, its output terminal connects constant voltage electronic load; Channel isolation; Circuit-under-test, its two ends, respectively by channel isolation, connect constant voltage electronic load.
Described constant voltage electronic load, binary channels low power consumption comparator is used to drive rear class P channel MOS power switching tube, the switching load of charging circuit is served as in simulation, comparer power supply, LDO power supply are provided by test macro, LDO stable output magnitude of voltage is as comparer positive benchmark comparative voltage, and negative is gone between to simulated battery voltage (VCC_Battery) by resistance proportion by subtraction network; When negative dividing potential drop is higher than positive benchmark, comparer exports low amplitude value, and drive the conducting of rear class MOS switching tube, otherwise then make it end, constant voltage electronic load finally makes simulated battery voltage be placed in fixed value thus, and value depends on negative potential-divider network.
Simulated battery voltage (VCC_Battery)=Vref*(1+R1/R2), wherein Vref is reference voltage value, and R1, R2 are respectively upper and lower two of dividing potential drop networking.
Described voltage configuration network is by amplifier, discrete component or both combinations or use the mode of special voltage-stabilizing device to build constant-current circuit.Q95, Q96 triode forms described current arrangements network, and current value is determined by the BE junction voltage of Q96 and R472 resistance value, that is: IO=VBE/R472, IO are the current value flowing through MOS switching tube, the charging current of simulation lithium battery; Rear class, is separated by two metal-oxide-semiconductors between simulated battery circuit and tested board charging circuit.
A kind of for checking the method for testing of the simulation lithium battery test circuit of product charging circuit, on the basis of the existing frock test macro of compatibility, test condition, cancel the people of external introducing lithium battery for manual operation, simulation lithium battery test circuit is integrated in test macro, the duty of test circuit stimulated replacement lithium battery, lithium battery circuit interface will be simulated be combined with tested board charging circuit, detect charged state by tested board charging circuit self and gather charging voltage, being shown test results by PC end.
Shortcoming according to existing scheme, the present invention is improved lithium battery testing efficiency targetedly by amendment testing scheme, design test circuit etc., reduce test fittings cost, is increased battery testing reliability and stability.
Meanwhile, by optimal inspection circuit, increase the compatibility of measurement system interface, reduce operator's human failure factor, improve test macro overall space utilization rate.
Accompanying drawing explanation
Describe exemplary embodiment of the present invention in more detail by referring to accompanying drawing, above and other aspect of the present invention and advantage will become and more be readily clear of, in the accompanying drawings:
Fig. 1: lithium battery test operation schematic diagram of the prior art;
Fig. 2: testing scheme framework of the present invention changes schematic diagram;
Fig. 3: test circuit design framework schematic diagram of the present invention;
Fig. 4: constant voltage electronic load circuit design circuit figure of the present invention;
Fig. 5: simulated battery Voltage Cortrol design circuit figure of the present invention;
Fig. 6: constant current current-limiting circuit design circuit figure of the present invention;
Fig. 7: the circuit theory diagrams of specific embodiments of the invention.
Embodiment
Hereinafter, more fully the present invention is described now with reference to accompanying drawing, various embodiment shown in the drawings.But the present invention can implement in many different forms, and should not be interpreted as being confined to embodiment set forth herein.On the contrary, provide these embodiments to make the disclosure will be thoroughly with completely, and scope of the present invention is conveyed to those skilled in the art fully.
Hereinafter, with reference to the accompanying drawings exemplary embodiment of the present invention is described in more detail.
On the basis of the existing frock test macro of compatibility, test condition, cancel the people of external introducing lithium battery for manual operation, simulation lithium battery test circuit is integrated in test macro, the duty of test circuit stimulated replacement lithium battery, adopt the detection mode identical with existing scheme, be about to simulation lithium battery circuit interface be combined with tested board charging circuit, detect charged state by tested board charging circuit self and gather charging voltage, being shown test results by PC end.Testing scheme framework changes schematic diagram as shown in Figure 2.
The integrated testing circuit of the present invention's design, in conjunction with the actual performance demand (containing operating voltage, charging and discharging currents etc.) of tested board charging circuit, simulation lithium battery principle of work, make its reliably by charging circuit identification and Absorbable organic halogens serve as its tested load.
Test circuit design framework schematic diagram as shown in Figure 3.
Detailed protocol design of the present invention is described below:
1 examination & verification lithium battery actual charge/discharge operation principle, namely after first constant-current charge to nominal voltage again constant-voltage charge to rated capacity;
2 cancel external introducing lithium battery, then test circuit answers alternative lithium battery in kind, and has its specific electrical property;
3 consider the stimulated replacement being convenient to different voltage specification lithium batteries, and design and the constant voltage electronic load circuit of its compatibility, simulate lithium battery constant voltage charging phase;
The actual electric property of 4 test constant voltage electronic load circuits under product charging circuit, and in conjunction with on existing Company material basis, increase current limliting constant-current circuit, make it can accept the charging current of demand, make it possess the characteristic of constant-current charge simultaneously;
5, in conjunction with constant voltage and constant-current circuit design, can increase real-time switching selecting circuit or switch according to the virtual voltage of tested board charging circuit, current needs pointedly, realize the Semi-intelligent Modular of testing apparatus;
Scheme Choice and design realize general introduction:
1 constant voltage electronic load circuit design
By realizations such as amplifier, discrete component or special voltage-stabilizing devices, the present invention gets comparer and metal-oxide-semiconductor has combined, then consider that it easily realizes, precision is high, routine of selecting materials, and can meet POS product charging voltage demand;
Be illustrated in fig. 4 shown below, this circuit uses a binary channels low power consumption comparator (LM393) to drive rear class P channel MOS power switching tube, the switching load of charging circuit is served as in simulation, comparer power supply, LDO power supply are provided by test macro, LDO exports (1.5V) stable voltage as comparer positive benchmark comparative voltage, and negative is gone between to simulated battery voltage (VCC_Battery) by resistance proportion by subtraction network; When negative dividing potential drop is higher than positive benchmark, comparer exports low amplitude value, and drive the conducting of rear class MOS switching tube, otherwise then make it end, this circuit final effect makes simulated battery voltage be placed in fixed value thus, and value depends on negative potential-divider network.CD1, D11 are for the protection of metal-oxide-semiconductor.LDO selects based on the conventional material of company, also can select voltage stabilizing diode, accurate reference voltage etc.
Wherein, VCC_Battery=Vref*(1+R1/R2), wherein Vref is reference voltage value, and R1, R2 are respectively upper and lower two of dividing potential drop networking (being R133/R134 in diagram).
2 simulated battery Voltage Cortrol designs, as shown in Figure 5.
By amplifier, discrete component or both combine or use the mode of special voltage-stabilizing device to build constant-current circuit, the design gets discrete component composition, consider that it easily realizes, pliotron load current range is large, follow-uply suitably can accept or reject scheme according to the stable accuracy sexual demand in practical application.
The basis of circuit 1 increases J34 bridle wire apparatus, and this circuit design selects two kinds of lithium battery voltage conventional in Products, i.e. 3.7V, 7.4V nominal value.Design circuit can meet the demand in actual production test and can true-time operation switch.
Other designs: this part can consider that being designed to hyperchannel switches and by test macro single-chip microcomputer Based Intelligent Control according to demand, cancel human users in addition.
3 constant current current-limiting circuit designs, as shown in Figure 6.
Q12, R123 and amplifier form constant current current limliting network, and current value is determined by R123 resistance and amplifier comparative voltage, that is:
IO=V-/R123, IO are the current value flowing through MOS switching tube, arrange the charging load size of current of lithium battery.
Rear class, is separated by two metal-oxide-semiconductors between simulated battery circuit and tested board charging circuit.
Other designs: this partial circuit also can be designed to hyperchannel in addition and switches and have Intelligent Single-Chip Based to control, to adapt to tested board charging circuit for the duty simulation under different charging current.Comprehensive above circuit can carry out the analog demenstration of the step condition changes such as constant-voltage charge, constant-current charge, invariable power simultaneously.
4 technical parameters
Selected by the configuration of potential-divider network, constant-current network, MOS switching tube and PNP triode, this circuit can meet the electrical specification demand of product charging chip, that is:
Single lithium battery charging voltage, 2.9V-4.2V;
Binodal lithium cell charging voltage, 5.7V-8.4V;
Lithium cell charging range of current, 150mA-1000mA;
The detailed schematic diagram that shown in accompanying drawing 7, the present invention finally realizes, selects network, reference voltage generating circuit, metal-oxide-semiconductor buffer circuit containing constant voltage circuit, constant-current circuit, dividing potential drop, remains for the lithium battery interface socket of compatible old scheme in advance.
Abbreviation in the present invention and Key Term are defined as follows:
ATB:AutomaticTestBoard, refers in particular to the ATE for testing Products;
EUT:EquipmentunderTest, refers in particular to the board detected by ATE;
AB:Adapterboard, refers in particular to the signal adapting device be connected with tested board by ATE.
The foregoing is only embodiments of the invention, be not limited to the present invention.The present invention can have various suitable change and change.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (6)

1., for checking a simulation lithium battery test circuit for product charging circuit, it is characterized in that:
Described test circuit is made up of following structure:
Single chip machine controlling circuit, respectively control voltage configuration network and current arrangements network;
Constant voltage electronic load;
Voltage configuration network, it exports termination constant voltage electronic load;
Current arrangements network, it connects constant voltage electronic load by constant-current circuit;
Reference voltage circuit, its output terminal connects constant voltage electronic load;
Channel isolation;
Circuit-under-test, its two ends, respectively by channel isolation, connect constant voltage electronic load;
Described constant voltage electronic load, binary channels low power consumption comparator is used to drive rear class P channel MOS power switching tube, the switching load of charging circuit is served as in simulation, comparer power supply, LDO power supply are provided by test macro, LDO stable output magnitude of voltage is as comparer positive benchmark comparative voltage, and negative is gone between to simulated battery voltage (VCC_Battery) by resistance proportion by subtraction network; When negative dividing potential drop is higher than positive benchmark, comparer exports low amplitude value, and drive the conducting of rear class MOS switching tube, otherwise then make it end, constant voltage electronic load finally makes simulated battery voltage be placed in fixed value thus, and fixed value depends on negative potential-divider network.
2. a kind of for checking the simulation lithium battery test circuit of product charging circuit as claimed in claim 1, it is characterized in that:
Wherein, simulated battery voltage VCC_Battery=Vref* (1+R1/R2), wherein Vref is comparer positive benchmark comparative voltage, and R1, R2 are respectively upper and lower two of dividing potential drop networking.
3. a kind of for checking the simulation lithium battery test circuit of product charging circuit as described in claim 1-2 any one, is characterized in that:
Described voltage configuration network is by amplifier, discrete component or both combinations or use the mode of special voltage-stabilizing device to build constant-current circuit.
4. a kind of for checking the simulation lithium battery test circuit of product charging circuit as claimed in claim 3, it is characterized in that:
Q12, R123 and amplifier form constant current current limliting network, and current value is determined by R123 resistance and amplifier comparative voltage, that is: IO=V-/R123, IO are the current value flowing through MOS switching tube, arrange the charging load size of current of lithium battery; Described Q12 is P channel MOS tube;
Rear class, is separated by two metal-oxide-semiconductors between simulated battery circuit and tested board charging circuit.
5. a kind of for checking the method for testing of the simulation lithium battery test circuit of product charging circuit according to claim 1,2,4 any one, is characterized in that:
On the basis of the existing frock test macro of compatibility, test condition, cancel the people of external introducing lithium battery for manual operation, simulation lithium battery test circuit is integrated in test macro, the duty of test circuit stimulated replacement lithium battery, lithium battery circuit interface will be simulated be combined with tested board charging circuit, detect charged state by tested board charging circuit self and gather charging voltage, being shown test results by PC end.
6. according to claim 3 a kind of for checking the method for testing of the simulation lithium battery test circuit of product charging circuit, it is characterized in that:
On the basis of the existing frock test macro of compatibility, test condition, cancel the people of external introducing lithium battery for manual operation, simulation lithium battery test circuit is integrated in test macro, the duty of test circuit stimulated replacement lithium battery, lithium battery circuit interface will be simulated be combined with tested board charging circuit, detect charged state by tested board charging circuit self and gather charging voltage, being shown test results by PC end.
CN201310236106.7A 2013-06-13 2013-06-13 A kind of for checking simulation lithium battery method of testing and the circuit of product charging circuit Active CN103344904B (en)

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CN105403825B (en) * 2015-12-31 2018-04-10 福建联迪商用设备有限公司 A kind of rechargeable battery charging circuit intelligence test management system and its method
CN107064776B (en) * 2017-04-20 2019-10-25 北京品驰医疗设备有限公司 A kind of pair of medical device circuitry plate carries out the system and method for reliability test

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CN101232107A (en) * 2007-01-24 2008-07-30 中茂电子(深圳)有限公司 Electronic load simulation charger operating method and apparatus thereof
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CN102539947A (en) * 2010-12-29 2012-07-04 东莞市妙达电动工具制造有限公司 Active voltage negative increase tester for charger testing
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