WO1994007278A1

WO1994007278A1 - Method for inspecting battery and apparatus therefor

Info

Publication number: WO1994007278A1
Application number: PCT/JP1992/001574
Authority: WO
Inventors: Kenkichi Shimomoto
Original assignee: M & C Co., Ltd.
Priority date: 1992-09-14
Filing date: 1992-11-30
Publication date: 1994-03-31
Also published as: JP2727149B2; JPH0694809A; CN1042766C; CN1084281A; AU2956792A

Abstract

A method for inspecting the deterioration of a battery and its residual capacity, and the apparatus therefor. In the method, a load (2) is connected with a battery (1) to be inspected, and the current corresponding to its capacity is made to flow through it. Then, by monitoring the change of the terminal voltage (V) of the battery (1) for a predetermined time, judged is the deterioration of the battery (1) according to the change. From the terminal voltage (V) of the battery (1), judged is the residual capacity of the battery (1). Further, the results of the judgement thereof are displayed on a displaying means. Thereby, the deterioration of the battery and its residual capacity can be grasped easily and surely, and they can be confirmed with the display immediately.

Description

Akira Itoda

Battery one inspection method and its device

The present invention relates to a battery inspection method and an apparatus for inspecting the degree of deterioration and remaining capacity of a battery. Background technology

Normally, the capacity of a battery is defined by the ampere-hour capacity (Ah) and the hourly rate. For example, a battery with a capacity of 1 OAh / 10 hourly rate only requires a constant current of 1 A to flow for 10 hours. Have the ability.

FIG. 6 shows an ideal discharge characteristic curve 30 for a 12 V battery. According to the figure, the terminal voltage of carbonochloridate Tteri is 1 2. fully charged when T of 6V, holds a substantially flat state space to the state at the time T ₂ of the more 1 0. 6V, the time empty state T ₂ After that, it descends sharply.

The discharge characteristic curve 30 shown in the figure is obtained when the battery is discharged in compliance with the above-mentioned time rate. For example, when a battery of 1 OAh / l 0 hour rate is discharged at a current of 10 A, the usable time is 1 hour. Rather, the battery becomes empty in about 30 minutes, and the discharge characteristic curve becomes irregular.

It is possible to know the remaining capacity of the battery from the terminal voltage of the battery, but since the terminal voltage does not decrease under no load, even if the terminal voltage of the battery is measured in such a state, the battery Can not know the remaining capacity.

Although the battery deteriorates due to long-term use, if the battery deteriorates, a flat discharge characteristic curve 30 as shown in the figure cannot be obtained, and it is necessary to replace the battery with a new one.

At present, the degree of deterioration of this battery cannot be judged without intuitively judging from the usable time of the actual use of the battery, but the usable time varies depending on the magnitude of the discharge current. It is not possible to judge the degree of deterioration of the battery correctly using an intuitive method. The present invention has been made in view of the above problems, and has as its object to provide a battery inspection method and a battery inspection method capable of accurately and easily grasping the degree of deterioration and remaining capacity of a battery. Disclosure of the invention

The invention according to claim 1 is a battery inspection method for inspecting the degree of deterioration of a battery, comprising connecting a load to the battery to be inspected, flowing a current corresponding to the capacity of the battery, and It is characterized by monitoring the change in the terminal voltage of the battery within time and judging the degree of deterioration of the battery from the state of the change.

The invention according to claim 2 is a battery-inspection method for inspecting the degree of deterioration and remaining capacity of a battery, wherein a load is connected to the battery to be inspected, a current corresponding to the battery capacity is passed, and a predetermined current is supplied. It monitors the change in battery terminal voltage over time, determines the degree of deterioration of the battery based on the change, and measures the battery terminal voltage to determine the remaining battery capacity. I do.

The invention according to claim 3 is a battery inspection apparatus for inspecting the degree of deterioration of a battery, which is for connecting a load to the battery to be inspected and flowing a current corresponding to the capacity of the battery. An energizing circuit; a time elapse measuring means for measuring an elapse of time after the energization of the energizing circuit is started; and a determination reference value for setting a determination reference value for each different set time for determining the degree of deterioration of the battery. Each time the value measured by the time measuring means coincides with each of the set times, the terminal voltage of the battery is compared with a reference value corresponding to the set time, and the state of the change in the terminal voltage of the battery. And a display means for displaying a result of the determination by the determination means.

The invention according to claim 4 is a battery-inspection device for inspecting the degree of deterioration and remaining capacity of a battery, wherein a load is connected to a battery to be inspected and a current for flowing a current corresponding to the battery capacity is supplied. A circuit; a time lapse measuring means for measuring a lapse of time after the power supply to the power supply circuit is started; and a battery deterioration degree. Determination reference value setting means for setting a first determination reference value for each different set time for determining a match and a second determination reference value of a different size for determining the remaining capacity of the battery; Each time the value measured by the time measuring means coincides with each of the set times, the terminal voltage of the battery is compared with a first judgment reference value corresponding to the set time to determine the state of change in the terminal voltage of the battery. First determining means for comparing the terminal voltage of the battery with each of the second determination reference values to determine the remaining capacity of the battery, and first and second determining means. Display means for displaying the determination result by the means.

According to the battery one inspection method of the present invention, a load is connected to a battery to be inspected, a current corresponding to the battery one capacity is supplied, and a change in a terminal voltage of the battery within a predetermined time is monitored. Since the degree of battery deterioration is determined from the state, and the remaining capacity of the battery is determined from the terminal voltage of the battery, the degree of deterioration and remaining capacity of the battery can be grasped easily and reliably. Further, in the battery inspection device according to the third and fourth aspects, since the judgment result is displayed, there is an effect that the degree of deterioration of the battery ゃ the remaining capacity can be immediately confirmed by looking at the displayed content. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a block diagram showing a configuration of a battery inspection apparatus according to one embodiment of the present invention,

FIG. 2 is an explanatory diagram showing a method of setting a first determination reference value,

FIG. 3 is an explanatory diagram showing a method of setting a second determination reference value,

FIG. 4 is a flowchart showing the control procedure of the control unit.

FIG. 5 is a flowchart showing details of step 9 in FIG. 4,

FIG. 6 is an explanatory diagram showing a discharge characteristic curve of a battery. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 shows a configuration of a battery inspection apparatus according to one embodiment of the present invention. This battery inspection device connects the load 2 to the battery 1 to be inspected and Power supply circuit 3 for supplying power, a timer 4 for measuring the time elapsed after the power supply circuit 3 starts to supply power, and a first determination reference value V for determining the degree of deterioration and remaining capacity of the battery 1. , ~V ₃ and the second determination reference value E, to E,. And a first determination unit that monitors the state of change of the terminal voltage V of the battery 1 and determines the degree of deterioration using the first determination reference values V 1 to V _3. 6, the first table radical 113 8 lighting display by four emitters 1 0 the discrimination results of the first determination unit 6, the second determination reference value E, the battery 1 using a to E _{l fl} A second determining unit 7 for measuring the terminal voltage to determine the remaining capacity, and a second display unit 9 for lighting and displaying the determination result of the second determining unit 7 using one illuminant 11. It has.

The load 2 is connected to supply a current corresponding to the battery capacity of the battery 1 to the energizing circuit 3.For example, if the battery capacity is 1 OAhZ10 hourly rate, the load 2 is constant at 1 A. One having a size that allows current to flow is used.

The energizing circuit 3 is provided with a switching contact 12 which is closed when the set button switch 13 is pressed, and opened when the reset button switch 14 is pressed. Operate.

A plurality of set times t1 to t4 described later are set in the timer 4, and when a start signal is input from the first discriminating unit 6, a time counting operation is started, and the time of each set time t1 to t3 is measured. A time-up signal is output each time it is performed.

The criterion value setting unit 5 is composed of, for example, by the reference voltage generating circuit, the first determination reference value V in FIG. 2, setting method of ~V ₃ is, the second determination reference value E in FIG. 3, ~ E]. The setting method of each is shown.

In FIG. 2, a to d are discharge characteristic curves of batteries having different degrees of deterioration, in which the horizontal axis represents time, and the vertical axis represents terminal voltage. a is an example of an ideal non-deteriorated battery discharge characteristic curve, b is an example of a good non-deteriorated battery discharge characteristic curve, and c is a discharge of a degraded battery. D shows an example of a characteristic curve, and d shows an example of a discharge characteristic curve of a battery that has deteriorated and needs to be replaced.

T0 on the horizontal axis indicates the inspection start time, and t4 indicates the inspection end time. The time width from the inspection start time t0 to the inspection end time t4 corresponds to the inspection time T. Previous The test start time t 0 is the time when the power supply to the power supply circuit 3 is started, and the test end time is the time when the power supply is stopped.

Tl～t 3 on the horizontal axis set time that is set Bok to the timer 4, the vertical axis V, is ~ V ₃ a first criterion value set in the criterion value setting unit 5, the first 1 5 judgment reference value V, ~V ₃ is determined experimentally slope of discharge characteristic curves of the battery by paying attention to the response in different to the degree of deterioration.

For example after power, at the time of the lapse of the set time t 1, t 2, t 3, when the terminal voltage V of the battery is inspection target is the first determination reference value V, ~V ₃ or more on each time point , that is, if the discharge characteristic curve is like a, the battery, it is determined that an ideal battery that is not _{inferior] 0} turned into give an evaluation of "excellent".

When the terminal voltage V of the battery to be inspected has passed the set time t1, it is smaller than the first judgment reference value V, but when the set times t2 and t3 have passed, the first judgment is made. If the reference value is equal to or higher than V ₂ or V ₃ , that is, if the discharge characteristic curve is like b, the battery is a good battery with almost no deterioration.

, 5 ree, and give a “good” rating.

Also tested terminal voltage V of the battery set time t 1 is a, t 2 only has passed at time point each of the first determination reference value V,, V ₂ smaller than, at the time of the lapse of set time t 3 ^ ί only the If this is the first determination reference value V ₃ or more, that is, when discharge electric characteristic curve as c, the battery that the battery deterioration has occurred

It is judged to be 20 and the evaluation of "attention" is given.

If also the terminal voltage V of a test object battery, at the time when has elapsed the set time Tl～t 3, the determination reference value V, if ~V ₃ smaller, i.e. discharge electric characteristic curves such as d, The battery is judged to be a battery that requires replacement with advanced deterioration, and is evaluated as “replacement required”.

5 Fig. 3 shows the second criterion values E] to E ,. FIG. 3 shows an ideal discharge characteristic curve 30 for a battery.

In the discharge characteristic curve 30, the full charge time T, the first second determination reference value E in the vicinity of the terminal voltage (1 2 V〗 2. 6 V in battery of), and the empty state when T ₂ Near the terminal voltage (10.6V for a 12V battery) Constant reference value E ,. And divide the interval into nine equal parts to set the second to ninth second judgment reference values E _{2 to} E _9, and the remaining capacity becomes 0 depending on the range of the terminal voltage V. %, 100%, ..., 100%. Thus if the terminal voltage V is E,> if V≥E _2, the remaining capacity is judged to be 90%.

Returning to FIG. 1, the first discriminating section 6 is composed of three voltage comparing sections 15, 16, 17 and 17 and a control section 18. Each voltage comparator 1 5 and 1 7 each first determination reference value V, the terminal voltage V of the battery 1, for the purpose of comparison respectively ~V _3, first determination reference value the terminal voltage V of each V, if the ~V ₃ or more decision data a logic "1", the to a _3, first determination reference value V, and judgment data if smaller logic "0 J from ~V _3, respectively control unit 1 8 Output to

The control section 18 is composed of, for example, a program logic device, and receives switch signals from the set button switch 13 and the reset button switch 14 to control the opening and closing of the switching contacts 12 and the timer 4. Outputs start signal and stop signal for. The control unit 1 8, Taimua-up signal determination data A from the voltage comparator 1 5-1 7 in response to an input of the timer 4, sequentially fetches the to A _3, these decision data A, to A _The degree of deterioration of the battery 1 is determined from ₃ and the result of the determination is output to the first display unit 8. The control procedure of the control unit 18 is shown in FIGS. 4 and 5 (details will be described later).

The first display section 8 has four light-emitting bodies 10 composed of light-emitting diodes, and one of the light-emitting bodies 10 is turned on according to the judgment result of the control section 18, and the battery 1 to be inspected is Degree of deterioration is evaluated as “excellent”, “good”, “caution”, or “replacement required”. In the example of FIG. 1, the second light-emitting body 10 indicated by oblique lines is lit, indicating that the battery 11 is good.

The second determination unit 7 includes a voltage comparison unit 19 and a holding unit 20. The voltage ratio較部1 9 each of the second determination reference value E obtained by the terminal voltage V of the battery 1, to E _{I 0} and intended for comparing each terminal voltage V of the individual second determination reference value E , ~ E ,. If it is more than this, the judgment data B, to B, of logic “1”. The, out smaller Ri by it the judgment data ~B ₁₀ of logic "0", to each holding unit 2 0 Power.

The holding unit 20 is formed of a latch circuit or the like, and the judgment data B,. And outputs it to the second display unit 9.

The second display unit 9 has one illuminant 11 composed of a light emitting diode, the corresponding illuminant 11 is turned on according to the data held in the holding unit 20, and the battery 1 to be inspected is Indicates any of the remaining capacity of “0%” to “100%”. In the example of FIG. 1, 10 light-emitting bodies 11 indicated by oblique lines are turned on, which indicates that the remaining capacity is 90%.

FIG. 4 shows a control procedure by the control unit 18 in steps 1 (indicated by “ST 1” in the figure) to step 11.

In step 1 of the figure, it is determined whether or not the set button switch 13 has been pressed. If the determination is "YES", a timer 4 timer output signal is output to start the timing operation. (Step 2).

In the next step 3, it is determined whether or not the set time t1 has elapsed based on whether or not the first time-up signal has been input from the timer 4. If the determination is “YES”, 1 The determination data A, is taken in from the voltage comparing section 15 and stored in the storage section (not shown) in the control section 18 (step 4).

In the next step 5, it is determined whether or not the set time t2 has elapsed based on whether or not the second time-up signal has been input from the evening timer 4, and if the determination is "YES", , the second voltage comparator 1 6 than Captures the determination data a _2, in the storage unit in the control unit 1 8 (not shown) (step 6). The next step 7 is to determine whether or not the set time t 3 has elapsed based on whether or not the third time-up signal has been input from the timer 14 .If the determination is “YES”, 3 th taken seen write determination data a ₃ from the voltage comparator unit 1 7, in the storage unit in the control unit 1 8 (not shown) (step 8).

Thus three decision data A, when to A ₃ is taken, the control unit 1 8 Step 9 follows to perform the control procedure shown in FIG. 5 (step 9 one 1～9- 1 0) Battery 1 Of the degree of deterioration of the battery.

Step 10 is to check whether the reset button switch 14 has been pressed after the inspection is completed. Is determined, and if the determination is “YES”, the control unit 18 outputs a stop signal to the timer 4 to stop the timing operation (step 11).

In Figure 5, the control unit 1 8 in step 9 one 1, wherein the storage unit than determine Teide Isseki reads A, a to A _3, determines fit deterioration degree 5 of the battery 1 by the data structure.

If determination data A, if to A ₃ are all logic "1", step 9-2 of the determination is "YES", in this case the battery 1 to be inspected is deteriorated though such have ideal battery And turn on the illuminant 10 indicating “excellent” (Step 9-3)

1 ₀ If the determination data A, but a logic "0", if the remaining determination data A _2, A ₃ logical "1", Step 9 4 of the determination is "YES", in this case the examiner It is determined that the battery 11 to be inspected is a good battery which has hardly deteriorated, and the light emitter 10 indicating "good" is turned on (step 9-5).

If determination data A,, also A ₂ are both a logic "0", if the remaining decision data IS A ₃ logical "1", the determination in step 9 one 6 becomes "YES", in this case inspection It is determined that the target battery 11 is a deteriorated battery, and the illuminant 10 indicating "caution" is turned on (step 9-7).

If determination data A, if to A ₃ are all logic "0", the determination becomes "YES" in Step 9 8, the battery 1 in this case is inspected progressed deterioration

20 Judge that the battery needs to be replaced, and turn on the illuminator 10 indicating “replacement required” (steps 9-1 9).

If not true even when if the determination data A, is to A ₃ of any mentioned above, and indeterminate, and informs that effect in this case is operated flashing a predetermined time all the light emitters 1 0 example Runado (Steps 9-11).

Claims

A battery-inspection method for inspecting the degree of deterioration of a battery. A load is connected to the battery to be inspected, and a current corresponding to the capacity of the battery is applied. A battery inspection method comprising: monitoring a change in battery terminal voltage; and determining a degree of deterioration of the battery based on the state of the change.

A battery inspection method for inspecting the degree of deterioration and remaining capacity of a battery,

A load is connected to the battery to be inspected, a current corresponding to the capacity of the battery is applied, and a change in the terminal voltage of the battery within a predetermined time is monitored, and the degree of deterioration of the battery is determined from the state of the change. A battery inspection method comprising: measuring a terminal voltage of a battery to determine a remaining capacity of the battery.

A battery-inspection device for inspecting the degree of deterioration of a battery. An energizing circuit for connecting a load (2) to the battery (1) to be inspected and flowing a current corresponding to the battery capacity (3). When,

A time lapse measuring means for measuring a lapse of time after the start of energization of the energizing circuit (3);

Judgment reference value setting means for setting judgment reference values (V, to V ₃ ) at different set times for judging the degree of deterioration of the battery (1);

Each time the value measured by the time measuring means coincides with each of the set times, the terminal voltage (V) of the battery (1) is compared with the criterion value (V, to V ₃ ) corresponding to the set time. Means for determining the state of change of the terminal voltage (V) of the battery (1)

A battery including a display unit for displaying a result of the determination by the determination unit;

4. A battery inspection device for checking the degree of deterioration and remaining capacity of a battery,

An energizing circuit (3) for connecting a load (2) to the battery (1) to be inspected and passing a current corresponding to the battery capacity;

A time lapse measuring means for measuring a lapse of time after the energization of the energizing circuit (3) is started;

Battery (1) different settings first criterion value per time for determining the degree of deterioration of the (V, ~V ₃₎ and battery (1) second different sizes of order was determined remaining capacity of A criterion value setting means for setting criterion values (E, to E,.);

Each time the value measured by the time measuring means coincides with each of the set times, the terminal voltage (V) of the battery (1) is compared with a first judgment reference value (Vj to V ₃ ) corresponding to the set time. First determining means for determining the state of change of the terminal voltage (V) of the battery (1)

The terminal voltage (V) of the battery (1) is changed to each of the above-mentioned second judgment reference values (E, to E

, ο) to determine the remaining capacity of the battery (1), and display means for displaying the results of the determination by the first and second determination means.