JP3395355B2 - Charging device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for charging a storage battery.

[0002]

2. Description of the Related Art A conventional charging device will be described below with reference to the drawings. FIG. 4 is a block diagram of a conventional charging device. In FIG. 4, 1 is a storage battery composed of a nickel-hydrogen storage battery, 2 is a voltage signal line for detecting the terminal voltage of the storage battery 1, 3 is a temperature sensor for detecting the temperature of the storage battery 1, and 4 is a signal detected by the temperature sensor 3. A temperature signal line 5 is a charge determination means for determining whether to set the quick charge mode or the supplementary charge mode based on the detected terminal voltage and temperature of the storage battery 1, and 6 is a quick charge circuit that supplies a quick charge current in the quick charge mode. , 7 is a supplementary charging circuit for supplying a supplementary charging current smaller than the quick charging current in the supplementary charging mode, 8 is a charging circuit switching control means for switching between the rapid charging circuit 6 and the supplementary charging circuit 7, and 9 is power to the device. It is a power supply circuit to supply. Here, this quick charge mode is
The terminal voltage is less than the voltage setting value Vs and the temperature is the temperature setting value θ.
e It is in the area below and can be charged rapidly. The supplementary charging mode is a case where the terminal voltage is in the range of the voltage setting value Vs or more and the temperature is in the temperature setting value θe or less, and the supplementary charging can be performed.

The operation of the conventional charging device configured as described above will be described below with reference to FIGS. 4 and 5. FIG. 5 is a diagram showing changes in terminal voltage, charging current, and battery temperature when a nickel-hydrogen storage battery is charged by a conventional charging device. In FIG. 5, te is a time point at which the supply of the rapid charging current in the rapid charging mode is terminated, Vs is a voltage setting value of the terminal voltage at which the supply of the auxiliary charging current in the auxiliary charging mode is started, and θe is a temperature setting of the temperature of the storage battery 1. The value, i ₁ is the current value of the quick charging current in the quick charging mode, and i ₂ is the current value of the auxiliary charging current in the auxiliary charging mode.

First, when the power supply circuit 9 is turned on, the charge determination means 5 reads the terminal voltage of the storage battery 1 through the voltage signal line 2 and the signal of the temperature of the storage battery 1 detected by the temperature sensor 3 through the temperature signal line 4. , Determine what kind of charging is possible. In this determination, if the terminal voltage is less than or equal to the voltage setting value Vs and the temperature is less than or equal to the temperature setting value θe, it is determined to be the quick charge mode. If the terminal voltage is more than or equal to the voltage setting value Vs and the temperature is less than or equal to the temperature setting value θe, the supplement This is to determine the charging mode. By this determination, when the normal power source is turned on, the normal rapid charging mode is determined, and the charging determination circuit 5
Is switched by the charging circuit switching control means 8 to the side of the rapid charging circuit 6 in the rapid charging mode, and the current value i _{1 of the} rapid charging current is changed.
The storage battery 1 is charged with.

While the rapid charging circuit 6 continues to supply the rapid charging current in the rapid charging mode, the terminal voltage of the storage battery 1 becomes equal to or higher than the voltage setting value Vs, and at this time, the temperature of the storage battery 1 is equal to or lower than the temperature setting value θe. For example, the charge determination means 5 determines the auxiliary charge mode. By this determination, the supply of the rapid charging current of the rapid charging circuit 6 in the rapid charging mode is completed. This point is te. Then, based on the judgment of the charge judging means 5, the charging circuit switching control means 8 switches from the quick charging circuit 6 to the side of the auxiliary charging circuit 7 in the auxiliary charging mode, and the storage battery 1 is supplied from the auxiliary charging circuit 7 with the current value of the auxiliary charging current. i
It will be charged by ₂ .

[0006]

In such a conventional charging device as described above, although the charging characteristics differ depending on the type of the storage battery 1, the constant charging current value i ₂ of the auxiliary charging current in the auxiliary charging mode is used. Since it is continuously performed, overcharging is likely to occur depending on the storage battery 1, and if the current value i ₂ of the supplementary charging current is reduced, the supplementary charging current is wastedly used as a reactive current to raise the temperature of the storage battery 1 and the self-discharge rate is high. Is prone to over-discharge. Further, when continuously performed at the current value i ₂ of the supplementary charging current to the extent that the supplementary charging mode can be effectively performed, the temperature of the storage battery 1 is at the time te at which the supply of the rapid charging current in the rapid charging mode is finished as shown in FIG. Is the temperature set value θe, the temperature further rises with the passage of time, which not only leads to deterioration of the performance of the storage battery 1, but also the storage battery may be destroyed and explode. There was a problem that there is.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a charging device which suppresses the temperature rise of the storage battery in the auxiliary charging mode and improves the safety regardless of the type of the storage battery. To do.

[0008]

In order to achieve this object, a charging device of the present invention is provided with a detecting means for detecting a terminal voltage and a temperature of a storage battery, and a rapid charging device based on the detected terminal voltage of the storage battery and the temperature of the storage battery. A charge determination unit that determines the charging mode or the supplementary charging mode, a charging circuit that supplies the rapid charging current or the supplemental charging current, and a clocking unit that measures time so that the supply of the supplemental charging current can be stopped when a predetermined time has elapsed,
It comprises a switching control means for switching between rapid charging and auxiliary charging based on the judgment of the charging judgment means, and when the auxiliary charging mode is judged, starts supplying auxiliary charging current and operates the clocking means, and Start supplying supplementary charging current and
When the time means is activated, the temperature of the storage battery is
The auxiliary charging current, the auxiliary charging current is stopped.
Set the value of the time measuring means when stopped as the predetermined time thereafter
However, the terminal voltage of the storage battery detected by the detection means is
When the voltage drops below a certain voltage, supply and measure the supplementary charging current.
The operation of the time means is started, and the time means is set to the predetermined time.
Is replenished when the time is measured or when the temperature exceeds the specified temperature.
The supply of electric current is stopped .

[0009]

Further, the charging device of the present invention has a structure in which the auxiliary charging current is constantly supplied continuously when the auxiliary charging current supply mode is a nickel-cadmium storage battery.

[0011]

The function of the present invention is to detect the terminal voltage and storage of the storage battery.
From fast charge mode to supplementary charge mode based on pond temperature
Can be switched, supplementary charging in supplementary charging mode
When the current supply is started, the timekeeping means starts timekeeping
Since the supply of the supplementary charging current is stopped when the time has elapsed , the temperature rise of the storage battery can be reliably prevented.

[0012]

Further, according to the present invention, when the auxiliary charging current supply mode is the nickel-cadmium storage battery, the auxiliary charging current is constantly supplied and continuously supplied, so that the charging can be reliably performed according to the storage battery.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a charging device according to an embodiment of the present invention. In FIG. 1, the same reference numerals as those in the conventional example are basically the same, and thus the detailed description is omitted. 1 is a storage battery composed of a nickel-hydrogen storage battery, 2 is a voltage signal line for detecting the terminal voltage of the storage battery 1, 3
Is a temperature sensor for detecting the temperature of the storage battery 1, 4 is a temperature signal line for transmitting a signal detected by the temperature sensor 3, and 5 is a quick charge mode or a supplementary charge mode based on the detected terminal voltage and temperature of the storage battery 1. Is a charge determining unit that determines the auxiliary charging current supply mode for each type of the storage battery 1 in the case of the auxiliary charging mode. The supplemental charging current supply mode for each type of the storage battery 1 is set in advance for each type of the storage battery 1 as to how to supply the supplemental charging current.

Reference numeral 6 is a quick charge circuit for supplying a quick charge current in the quick charge mode, and reference numeral 7 is a supplement charge current smaller than the quick charge current based on the determination of the supplement charge current supply mode of the charge discrimination means 5 in the supplement charge mode. A supplementary charging circuit to be supplied, 8 is a charging circuit switching control means for switching between the quick charging circuit 6 and the supplementary charging circuit 7, 9 is a power supply circuit for supplying electric power to the apparatus, and 10 is a storage battery 1 and a temperature sensor 3. A nickel-hydrogen storage battery pack, 11 is a nickel-cadmium storage battery pack, and 12 is a type detection terminal for detecting the type of the nickel-hydrogen storage battery pack 10 or the nickel-cadmium storage battery pack 11. The type detection terminal 12 is used in the nickel-hydrogen storage battery pack 10. It is connected to GND and is open in the nickel-cadmium storage battery pack 11.

Reference numeral 13 is a charge discrimination means 5 and a type detection terminal 12
, A type signal line for connecting between the auxiliary charging circuit 7 and the charging circuit switching control means 8, and an opening / closing section including a switch for opening and closing the supply of the auxiliary charging current of the auxiliary charging circuit 7 and 15 an auxiliary charging According to the determination that the mode is the mode, the auxiliary charging circuit 7 starts counting the time when the supply of the auxiliary charging current according to the type of the storage battery 1 is started according to the auxiliary charging current supply mode set for each type of the storage battery 1, and the predetermined time elapses. Then, 16 is a time-measuring means including a timer for stopping the supply of the current when the current is still being supplied, and 16 is a time-measuring means after the time-measuring means 15 has measured a predetermined time or when the temperature is equal to or higher than the temperature set value θe. A reset input for resetting the means 15. Here, in the supplementary charging current supply mode, since the method of supplying the supplementary charging current differs depending on the type of the storage battery 1, it is preset how to supply the supplementary charging current for each type. When done, the supplementary charging current according to the type of the storage battery 1 is supplied.

The operation of the charging apparatus according to the embodiment of the present invention constructed as above will be described with reference to FIGS. 1, 2 and 3. FIG. 2 is a diagram showing changes in terminal voltage, charging current and battery temperature when a nickel-hydrogen storage battery is charged by the charging device according to the embodiment of the present invention. FIG. 3 is a diagram showing changes in terminal voltage, charging current and battery temperature when a nickel-cadmium rechargeable battery is charged by the charging device according to the embodiment of the present invention. 2 and 3, te is a time point at which the supply of the quick charge current in the quick charge mode is terminated, Vs is a voltage setting value of the terminal voltage at which the supply of the supplement charge current in the supplement charge mode is started, and θe is the temperature of the storage battery. The temperature setting value, i ₁ is the current value of the quick charging current in the quick charging mode, and i ₂ is the current value of the auxiliary charging current in the auxiliary charging mode. In FIG. 2, tf is a time point when the supply of the auxiliary charge current in the auxiliary charge mode is started, and tg is a time point when the supply of the auxiliary charge current in the auxiliary charge mode is ended.

First, when the power supply circuit 9 is turned on, it is determined whether or not the power supply is charged.
The means 5 supplies the terminal voltage of the storage battery 1 through the voltage signal line 2.
Read and detect the temperature of the storage battery 1 with the temperature sensor 3.
Then, the detected temperature is read through the temperature signal line 4. So
Then, the charge determination means 5 makes a quick determination from the detected values.
The voltage of the terminal voltage that can supply the charging in the charging mode.
Pressure setting value Ve or less and temperature is temperature setting value θe or less
Whether or not the terminal voltage in auxiliary charging mode is set
Whether the temperature is above the constant value Ve and below the temperature set value θe
Or otherwise. Usually power
Since the conditions for the quick charge mode are satisfied at the time of charging,
The charge discriminating means 5 is rapidly charged by the charging circuit switching control means 8.
Switch to the circuit 6 side to change the charging current in the quick charging mode.
Current value i ₁ Then, the storage battery 1 is charged.

Next, while the rapid charging circuit 6 continues to supply the rapid charging current in the rapid charging mode, the terminal voltage of the storage battery 1 becomes the voltage set value Vs or more, and at this time, the storage battery 1
If the temperature is less than or equal to the temperature set value θe, the charge determination means 5 determines the auxiliary charge mode. By this determination, the supply of the rapid charging current of the rapid charging circuit 6 in the rapid charging mode is completed. This point is te. Further, at this time, since the type of the storage battery 1 is read into the charging determination means 5 from the type signal line 13 of the level of the setting type signal of the type detecting terminal 12, the storage battery 1 is detected by the setting type signal of the type detecting terminal 12. The charging determination means 5 determines the auxiliary charging current supply mode for each type under the auxiliary charging mode. In the supplementary charging current supply mode, the method of supplying the supplemental charging current differs depending on the type of the storage battery 1, and therefore, how to supply the supplemental charging current for each type of the storage battery 1 is preset.

For example, as a setting type signal of the type detecting terminal 12, an "L" level (corresponding to the one connected to the GND) or an "H" level (corresponding to the above-mentioned opened one).
This is given to the nickel-hydrogen storage battery pack 10 and the nickel-cadmium storage battery pack 11, and by detecting this, it is determined whether it is the nickel-hydrogen storage battery pack 10 or the nickel-cadmium storage battery pack 11.
Of course, the level of the setting type signal of the type detection terminal 12 and the combination of the nickel-hydrogen storage battery pack 10 and the nickel-cadmium storage battery pack 11 are arbitrary. Further, if the number of type detection terminals 12 is increased, it is possible to cope with the increase in the types of the storage battery 1. In the present embodiment, the setting type signal of the type detection terminal 12 will be described assuming that the “L” level is the nickel hydrogen storage battery pack 10. Also, the type detection terminal 12
The setting type signal of “H” level will be described as the nickel cadmium storage battery pack 11.

In this way, the charging discriminating means 5 discriminates that the set type signal of the type detecting terminal 12 is the "L" level nickel-hydrogen storage battery pack 10, and gives the supplementary charging current corresponding to the nickel-hydrogen storage battery pack 10. Is determined, the charging circuit switching control means 8 switches the charging circuit from the quick charging circuit 6 to the side of the auxiliary charging circuit 7 in the auxiliary charging mode. This is the time point te in FIG. At this point in time, the terminal voltage of the storage battery 1 of the nickel-hydrogen storage battery pack 10 is equal to or higher than the voltage setting value Vs and the temperature is equal to or lower than the temperature setting value θe. Therefore, the supplementary charging current supply mode of the nickel-hydrogen storage battery determined by the charge determination means 5 is determined. Accordingly, the storage battery 1 is charged with the current value i ₂ of the supplementary charging current when the opening / closing unit 14 of the supplementary charging circuit 7 is closed and in the ON state.

When the supply of the supplementary charging current is started, the time measuring means 15 starts the time counting by the timer. When the temperature of the storage battery 1 reaches the temperature set value θe in the supplementary charging current supply mode of the nickel-hydrogen storage battery while the time keeping and the supply of the supplementary charging current are continued, the charging determination means 5 detects this temperature and the charging determination means 5 measures the time.
The timer is reset by the reset input 16. This time is the time point of the first tg in FIG. At this point, when the timer of the timekeeping means 15 is reset, the opening / closing unit 14 of the auxiliary charging circuit 7 is opened and turned off, and the supply of the auxiliary charging current from the auxiliary charging circuit 7 is stopped.

Next, as time elapses, the storage battery 1 self-discharges and the terminal voltage decreases, and at time tf in FIG.
When the terminal voltage reaches the voltage setting value Vs at which the supply of current is started according to the supplementary charging current supply mode of the nickel-hydrogen storage battery, the charge determining means 5 determines the voltage setting value Vs and cancels the reset of the timer of the clock means 15. At this time, the time counting means 15 starts the time counting by the timer. Further, while the timekeeping means 15 is being timed by the timer, the signal from the timekeeping means 15 closes the opening / closing part 14 of the auxiliary charging circuit 7 to be in the ON state, and the auxiliary charging current supply mode of the nickel-hydrogen storage battery is followed. The storage battery 1 is charged by the current value i ₂ of the supplementary charging current of the charging circuit 7.

After that, the timer of the time measuring means 15 sets a predetermined time (a time measured from the time t when the supply of the quick charge is finished to the first tg when the supply of the supplementary charging current is stopped, as a predetermined time thereafter. ) Has passed and the timing ends. When the time counting is completed, the time counting means 15 automatically resets the timer again by the reset input 16, and the signal of the time counting means 15 opens and closes the opening / closing part 14 of the auxiliary charging circuit 7 to turn off the auxiliary charging circuit 7 and the storage battery 1 The supply of supplemental charging current to the battery is stopped.

On the other hand, on the other hand, when a predetermined time has passed, the time measuring means 15
Even while the timer is being timed, when the temperature of the storage battery 1 reaches the temperature set value θe in the supplementary charging current supply mode of the nickel-hydrogen storage battery, this temperature is detected and the charge determination means 5 resets the timer of the timekeeping means 15. The state is reset by the input 16. This time is the time point of the second tg in FIG. When the timer of the clock means 15 is reset, the opening / closing part 14 of the auxiliary charging circuit 7 is opened and turned off, and the supply of the auxiliary charging current from the auxiliary charging circuit 7 is stopped. Thus, tg is determined by either the temperature set value or the reset of the timer.

When time elapses in this state, the storage battery 1 continues self-discharging again and the terminal voltage decreases, and the terminal voltage is set to a voltage setting at which the terminal voltage starts to supply current in accordance with the supplementary charging current supply mode of the nickel-hydrogen storage battery. When the value becomes Vs,
The above-mentioned charge determination means 5 determines the voltage setting value Vs, cancels the reset of the timer of the time measurement means 15, and the time measurement means 15 is released.
Restarts the time counting by the timer, closes the opening / closing part 14 of the auxiliary charging circuit 7 by the signal from the time measuring means 15, and sets the current value of the auxiliary charging current of the auxiliary charging circuit 7 according to the auxiliary charging current supply mode of the nickel-hydrogen storage battery. The operation of charging the storage battery 1 with i ₂ is repeated. In this way, the terminal voltage of the nickel-hydrogen storage battery pack 10 is maintained, and the temperature rise of the storage battery can be reliably prevented.

Next, the nickel-cadmium storage battery pack 1
The case of charging 1 will be described. First, the power supply circuit 9
When the power is turned on, the charge determination means 5 reads the terminal voltage of the nickel-cadmium storage battery pack 11 through the voltage signal line 2 and the temperature of the nickel-cadmium storage battery pack 11 through the temperature signal line 4. Then, whether or not the temperature is equal to or lower than the voltage set value Ve of the terminal voltage and the temperature equal to or lower than the temperature set value θe at which the charging determination unit 5 can supply the charge in the quick charge mode based on the respective detected values, or
It is determined whether or not the terminal voltage in the auxiliary charging mode is equal to or higher than the voltage setting value Ve and the temperature is equal to or lower than the temperature setting value θe, or is other than that. Normally, when the power is turned on, the conditions for the quick charge mode are satisfied, so the charge determination means 5 is switched to the quick charge circuit 6 side by the charge circuit switching control means 8 to set the current value of the quick charge current in the quick charge mode. The storage battery 1 is charged at i ₁ . This time point is the left end of FIG.

Next, while the rapid charging circuit 6 continues to supply the rapid charging current in the rapid charging mode, the terminal voltage of the storage battery 1 becomes the voltage set value Vs or more, and at this time, the storage battery 1
If the temperature is less than or equal to the temperature setting value θe, the charge determination means 5
Discriminates the auxiliary charging mode. By this determination, in the quick charge mode, the supply of the quick charge current of the quick charge circuit 6 is completed. This point is te. Further, at this time, the level of the set type signal of the type detection terminal 12 of the nickel-cadmium storage battery pack 11 is set in the charge determination means 5 by the type signal line 13.
Since it is read from the charging detection means 5, the charging discrimination means 5 determines the auxiliary charging current supply mode for each type under the auxiliary charging mode of the storage battery 1 by the setting type signal of the “H” level of the nickel-cadmium storage battery pack 11 of the type detection terminal 12. decide. When the supplemental charging current supply mode of the nickel-cadmium storage battery, which indicates how to provide the supplemental charging current corresponding to the nickel-cadmium storage battery pack 11, is determined, the charging circuit switching control means 8 causes the quick-charging circuit 6 to supplement the supplement-charging circuit in the supplemental charging mode. Switch the charging circuit to the 7 side.

At this point, the timekeeping means 1 is operated according to the determined supplementary charging current supply mode of the nickel-cadmium storage battery.
The open / close part 14 is closed by the signal of 5 and turned on.
When the opening / closing part 14 is closed, a constant current value i ₂ is supplied from the auxiliary charging circuit 7 as an auxiliary charging current corresponding to the auxiliary charging current mode of the nickel-cadmium storage battery, and the nickel-cadmium storage battery is charged. This point is te in FIG.
Is.

Thus, in the case of the nickel-cadmium storage battery pack 11, the constant current value i ₂ is supplied.
Unlike the nickel-metal hydride storage battery pack 10, if the current value i _{2 of} the auxiliary charging current is appropriate from the auxiliary charging circuit 7 even immediately after the rapid charging mode is supplied, the nickel-cadmium battery pack 11 is continuously supplied with the auxiliary charging mode. This is because the supplementary charging current can be supplied. The reason is as follows. If the supply of the supplementary charging current in the supplementary charging mode is constantly continued, even if oxygen starts to be generated in the positive electrode, hydrogen is not generated in the cadmium negative electrode having a large hydrogen overvoltage. Moreover,
Cadmium easily reacts with oxygen, reacts with oxygen generated in the positive electrode to become cadmium hydroxide, and since the negative electrode maintains a state where it can be continuously charged, the temperature of the nickel-cadmium storage battery pack 11 does not continue to rise. The performance can be sufficiently maintained by maintaining a constant temperature.

By the way, the nickel-hydrogen storage battery pack 10
Alternatively, when the power supply circuit 9 is turned off from the state of supplying the supplementary charging current in the supplementary charging mode of the nickel-cadmium storage battery pack 11, or when the nickel-hydrogen storage battery pack 10 or the nickel-cadmium storage battery pack 11 is removed, The charging circuit switching control means 8 is the auxiliary charging circuit 7.
, And the opening / closing part 14 of the auxiliary charging circuit 7 returns to the open and off state.

In the present embodiment, the charging device for the nickel-hydrogen storage battery pack 10 and the nickel-cadmium storage battery pack 11 has been described, but other storage batteries such as a metal lithium storage battery, a lithium-ion storage battery, a nickel-zinc storage battery, a nickel-iron storage battery, Of course, it can be applied to lead-acid batteries and the like.

[0033]

As described above, in the charging device of the present invention, the charging device based on the detected terminal voltage of the storage battery and the temperature of the storage battery is detected.
Since the charging determination means for determining the fast charging mode or the supplementary charging mode is provided, any storage battery can be supported regardless of the type of storage battery, and the temperature rise can be suppressed.

Further, in the charging device of the present invention, when the charging circuit switching control means starts the supply of the supplementary charging current, the clocking is started, and the supply of the supplementary charging current can be stopped when a predetermined time has elapsed.
Since the timekeeping means for timing is provided so that the temperature rise of the storage battery can be reliably prevented, the safety is improved.

Further, in the charging device of the present invention, when the auxiliary charging current supply mode is the nickel-cadmium storage battery, the auxiliary charging current is constantly supplied and is continuously supplied, so that the battery can be surely charged according to the storage battery.

As described above, it is possible to realize an excellent charging device which can be applied to any storage battery regardless of the type of the storage battery and whose temperature rise is suppressed and safety is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a charging device according to an embodiment of the present invention.

FIG. 2 is a diagram showing changes in terminal voltage, charging current, and battery temperature when a nickel-hydrogen storage battery is charged by the charging device according to the embodiment of the present invention.

FIG. 3 is a diagram showing changes in terminal voltage, charging current, and battery temperature when a nickel-cadmium storage battery is charged by the charging device according to the embodiment of the present invention.

FIG. 4 is a block diagram of a conventional charging device.

FIG. 5 is a diagram showing changes in terminal voltage, charging current and battery temperature when a nickel-hydrogen storage battery is charged by a conventional charging device.

[Explanation of symbols]

1 storage battery 2 voltage signal line 3 temperature sensor 4 Temperature signal line 5 Charge discrimination means 6 Rapid charging circuit 7 Auxiliary charging circuit 8 Charging circuit switching control means 9 power supply circuit 10 Nickel-metal hydride storage battery pack 11 Nickel cadmium storage battery pack 12 types of detection terminals 13 types of signal line 14 Opening and closing part 15 Timekeeping means 16 Reset input

Claims (3)

(57) [Claims] 1. A detection means for detecting a terminal voltage and a temperature of a storage battery, a charge determination means for determining a quick charge mode or a supplementary charge mode based on the detected terminal voltage of the storage battery and the temperature of the storage battery, and a quick charge current or A charging circuit for supplying an auxiliary charging current, a timing means for timing so that the supply of the auxiliary charging current can be stopped when a predetermined time has elapsed, and a switching control for switching between rapid charging and auxiliary charging based on the judgment of the charging judging means. When the charge determination means determines the auxiliary charging mode, the switching control means starts the supply of the auxiliary charging current and operates the time measuring means to start the supply of the auxiliary charging current first. When the timekeeping means is operated, the auxiliary charging current is stopped when the temperature of the storage battery reaches a predetermined temperature, and the value of the timekeeping means at the time when the auxiliary charging current is stopped is set to the following value. When set as time, when the terminal voltage of the storage battery detected by the detection means drops below a predetermined voltage, supply of supplemental charging current and operation of the timekeeping means are started, and the timekeeping means measures the predetermined time. Alternatively, the charging device is characterized in that the supply of the supplementary charging current is stopped when the temperature exceeds a predetermined temperature. 2. A detection means for respectively detecting a terminal voltage and a temperature of a storage battery and a setting type signal, and determining a supplementary charging current supply mode set for each type of the storage battery by the setting type signal, When the charging current supply mode is a nickel-hydrogen storage battery, when the supply of the supplementary charging current is first started and the timekeeping means is operated, the supplemental charging current is stopped when the temperature of the storage battery reaches a predetermined temperature, The value of the time measuring means when the supplementary charging current is stopped is set as a predetermined time thereafter, and when the terminal voltage of the storage battery detected by the detecting means falls below a predetermined voltage, the supply of the supplementary charging current and the time measuring means 2. The charging device according to claim 1, further comprising: starting an operation, and stopping the supply of the supplementary charging current when the time measuring means measures the predetermined time or exceeds a predetermined temperature. Place If wherein supplemental charging current supply mode is nickel flaps Miu arm battery charging apparatus according to claim 2, wherein the replenishing DENDEN stream is fed into the continuous constant.