JPH06310179A - Loading device and charging device for battery, and battery pack - Google Patents

Abstract

PURPOSE:To learn the usable time of a battery within a battery pack in response to load current. CONSTITUTION:The loading device 8 is equipped with a battery 2 capable of being charged, and with a battery pack 1 provided with a non-volatile memory 3 storing the nominal charge capacity value and a remaining charge capacity value of the battery 2. The loading device includes a current detector 14 detecting the loading current of the battery 2, a current integrating means 15 integrating current detected by the current detector 14, outputting the present remaining charge capacity value of the battery 2 based on the result of aforesaid integration, the initial remaining charge capacity value and the nominal charge capacity value read out of the memory 3, an operation means 16 computing the usable time of the battery 2 based on the present remaining charge capacity value from the current integrating means 15 and load current, and includes a display means 17 displaying the usable time of the battery 2 computed by the operating means 16. This battery loading device allows remaining charge capacity value stored in the memory 3 to be rewritten into a present remaining charge capacity value from the current integrating means 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery load device for a battery pack having a rechargeable battery, a charging device for charging a battery pack having a rechargeable battery, and a battery pack having a rechargeable battery. .

[0002]

2. Description of the Related Art Conventionally, a battery pack having a rechargeable battery is provided with a non-volatile memory for storing a nominal charge capacity value and a residual charge capacity value of the battery, and a camera-integrated VTR in which the battery pack is mounted. The load device is equipped with a display device for displaying the remaining charge capacity value stored in the non-volatile memory of the battery pack so that the remaining charge capacity value of the rechargeable battery of the battery pack can be known. ing.

[0003]

However, since the load current of the load device to which the battery pack is mounted, that is, the consumption current, changes depending on the type of the load device, the usage condition, etc., the chargeable battery of the battery pack is Only knowing the value of the remaining charge capacity does not tell how long the battery will last. Therefore, you lose the opportunity to replace or charge the battery pack, and, for example,
There is a risk of losing the opportunity to capture and record a desired subject with the camera-integrated television camera.

In view of the above points, an object of the present invention is to provide a load device equipped with a battery pack equipped with a rechargeable battery and a non-volatile memory for storing the nominal charge capacity value and the residual charge capacity value of the battery. It is to propose a device that can know the usage time of the battery of the battery pack according to the current.

Another object of the present invention is to provide a charging device for charging a battery pack comprising a rechargeable battery and a non-volatile memory for storing the nominal charge capacity value and the residual charge capacity value of the battery. It is intended to propose a nonvolatile memory capable of storing the residual charge capacity value of the battery.

Still another object of the present invention is to propose a battery pack having a rechargeable battery, which can be used for a battery load device and a charging device according to the present invention.

[0007]

According to a first aspect of the present invention, a battery pack 1 having a rechargeable battery 2 and a non-volatile memory 3 for storing a nominal charge capacity value and a residual charge capacity value of the battery 2 is mounted. Which is a load device 8 for detecting the load current of the battery 2, and the current detector 14
A current accumulating means 15 for accumulating the currents detected by, and outputting the current residual charge capacity value of the battery 2 from the accumulation result and the initial residual charge capacity value and the nominal charge capacity value read from the memory 3, A calculation unit 16 for calculating the usable time of the battery 2 from the current remaining charge capacity value and the load current from the current integration unit 15, and a display for displaying the usable time of the battery 2 calculated by the calculating unit 16. And a device 17, which is a battery load device configured to rewrite the remaining charge capacity value stored in the memory 3 with the current remaining charge capacity value from the current accumulating means 15.

The second aspect of the present invention is a charging device 18 for charging a battery pack 1 having a rechargeable battery 2 and a non-volatile memory 3 for storing the nominal charge capacity value and the remaining charge capacity value of the battery 2. Therefore, the current detector 24 for detecting the charging current of the battery 2 and the currents detected by the current detector 24 are integrated, and the integrated result and the initial residual charge capacity value and the nominal charge read from the memory 3 are accumulated. A current accumulating means 25 for outputting the current remaining charge capacity value of the battery 2 from the capacity value, and the remaining charge capacity value stored in the memory 3 is expressed by the current remaining charge capacity value from the current accumulating means 25. It is a rechargeable charging device.

The third aspect of the present invention comprises a rechargeable battery 2 and a non-volatile memory 3 for storing the nominal charge capacity value and the residual charge capacity value of the battery 2, and the battery 2 has a power supply terminal 4,
5 is a battery pack in which the memory terminals 6 and 7 are derived from the non-volatile memory 3 as well as 5.

[0010]

According to the first aspect of the present invention, the load current of the battery 2 is detected by the current detector 14, the detected currents are integrated by the current integrating means 15, and the integrated result and the memory 3 are read. The present remaining charge capacity value of the battery 2 is output from the obtained initial remaining charge capacity value and the nominal charge capacity value, and the operating time of the battery 2 is calculated from the present remaining charge capacity value and the load current by the calculating means 16. Is calculated, the calculated usable time is displayed on the display device 17, and the remaining charge capacity value stored in the memory 3 is
It is rewritten with the current remaining charge capacity value from the current accumulating means 15.

According to the second aspect of the present invention, the charging current of the battery 2 is detected by the current detector 24, the detected current is integrated by the current integrating means 25, and the integrated result and the read result from the memory 3 are obtained. The present remaining charge capacity value of the battery 2 is output from the calculated initial remaining charge capacity value and the nominal charge capacity value, and the remaining charge capacity value stored in the memory 3 is calculated from the current remaining charge value from the current integrating means 25. Rewrite with the capacitance value.

According to the third aspect of the present invention, the battery pack 1 is connected to the load device 8 to supply power to the load device 8 and the residual charge capacity value from the load device 8 is stored in the nonvolatile memory 3. The battery pack 1 is stored, or the battery pack 1 is connected to the charging device 18 to charge the battery pack 1, and the remaining charge stored in the non-volatile memory 3 at the current remaining charge capacity value from the charging device 18. Rewrite the capacitance value.

[0013]

EXAMPLE An example (1) (battery load device) of the present invention will be described below with reference to FIG. First, the battery pack 1 used by being mounted on the load device 8 will be described. The battery pack 1 includes a non-volatile memory (for example, EEPRO) that stores one or more rechargeable batteries 2 and a nominal charge capacity value and a residual charge capacity value of the battery 2.
M: Electocali Erasable Read Only
Memory) 3. Positive and negative power supply terminals 4, 5 from the battery 2
And the memory terminals 6 and 7 are derived from the non-volatile memory 3.

Next, the load device 8 will be described. The load device 8 can be various electric and electronic devices, but here it is, for example, a camera-integrated VTR. 10 and 11 are positive and negative power supply terminals, which are the positive and negative power supply terminals 4 of the battery pack 1,
5 are connected respectively. 12 and 13 are memory terminals,
It is connected to the memory terminals 6 and 7 of the battery pack 1. The memory terminals 4, 5 and 12, 13 are composed of terminals for write and read data and terminals for write / read control signals, respectively.

Next, the battery remaining capacity display device 9 of the load device 8 will be described. The positive and negative power supply terminals 10 and 11 are
Through the current detector 14, power is supplied to each circuit, motor, etc. to be supplied. The current integration circuit 15 controls writing / reading of the memory 3 of the battery pack 1 via the control bus, integrates the current detected by the current detector 14, and reads the integrated result and the data from the memory 3 to obtain the data. The current remaining charge capacity value of the battery 2 is output from the initial remaining charge capacity value and the nominal charge capacity value obtained via the bus, and is supplied to the available time calculating circuit 16.
Also, every time the current remaining charge capacity value changes by, for example, 5% of the nominal charge capacity, the remaining charge capacity value stored in the memory 3 is rewritten with the current remaining charge capacity value.

The available time calculating circuit 16 calculates the remaining charge capacity value and the load current from the current integrating circuit 15,
The usable time of the battery 2 is calculated. The output of the available time calculating circuit 16 is supplied to the display device 17 and displayed. The display device 17 can be a liquid crystal display device, an LED display device, a CRT display device, or the like, but when the load device 8 is a camera-integrated VTR, the viewfinder CRT can be used.

Next, an embodiment (2) (charging device) will be described with reference to FIG. Since the battery pack 1 is the same as that shown in FIG. 1, its explanation is omitted. The positive and negative power supply terminals 20 and 21 are
Through the current detector 24, it is connected to a DC power supply circuit (not shown). This DC power supply circuit is composed of a circuit or the like for rectifying an AC voltage from a commercial AC power supply. Two
Memory terminals 2 and 23 are connected to the memory terminals 6 and 7 of the battery pack 1. The memory terminals 22 and 23 are composed of write and read data terminals and write / read control signal terminals, respectively.

The current integrating circuit 25 controls writing / reading of the memory 3 of the battery pack 1 via the control bus, and integrates the current detected by the current detector 24,
The current remaining charge capacity value of the battery 2 is output from the integration result and the initial remaining charge capacity value and the nominal charge capacity value read from the memory 3 and obtained via the data bus. The remaining charge capacity value from the current integration circuit 25 is supplied to a display device (LCD display device, LED display device, CRT display device, etc.) 27, and the remaining charge capacity value is a standard remaining time or battery voltage. Etc. are displayed. Also, every time the current remaining charge capacity value changes by, for example, 5% of the nominal charge capacity, the remaining charge capacity value stored in the memory 3 is rewritten with the current remaining charge capacity value.

A voltage detector 26 is connected between the power terminals 20 and 21. Then, the detection output of the voltage detector 26 and the residual charge capacity value from the current integration circuit 25 are
It is supplied to the life determining device 28, and the abnormality, the life, etc. of the battery 2 are determined. The determination result from the battery abnormality / life determination device 28 is supplied to the display device 27 and displayed.

The parts 15, 16 and 2 shown in FIGS.
5 and 28 can also be realized by the functions of different computers.

[0021]

According to the battery load device of the present invention described above, a load in which a rechargeable battery and a battery pack having a non-volatile memory for storing a nominal charge capacity value and a residual charge capacity value of the battery are mounted. In the device, it is possible to know the usage time of the battery of the battery pack according to the load current.

According to the charging device of the present invention described above, in a charging device for charging a rechargeable battery and a battery pack having a non-volatile memory for storing the nominal charge capacity value and the remaining charge capacity value of the battery, The remaining charge capacity value of the battery can be stored in the non-volatile memory of the battery pack. As a result, the initial value of the accurate remaining charge capacity value after charging can be stored in the nonvolatile memory of the battery pack mounted in the battery load device according to the present invention.

According to the above-described battery pack of the present invention, the battery pack including a rechargeable battery can be used by being adapted to the battery load device and charging device according to the present invention.

[Brief description of drawings]

FIG. 1 is a block diagram showing a load device according to an embodiment (1) of the present invention.

FIG. 2 is a block diagram showing a charging device according to an embodiment (2) of the present invention.

[Explanation of symbols]

 1 Battery Pack 2 Battery 3 Memory 4 Power Supply Terminal 5 Power Supply Terminal 6 Memory Terminal 7 Memory Terminal 7 Memory Device 8 Battery Remaining Capacity Display 10 Power Supply Terminal 11 Power Supply Terminal 12 Memory Terminal 13 Memory Terminal 14 Current Detector 15 Current Accumulation Circuit 16 Usable time calculation circuit 17 Display device 20 Power supply terminal 21 Power supply terminal 22 Memory terminal 23 Memory terminal 24 Current detector 25 Current integration circuit 27 Display device 28 Battery abnormality / life determination device

Claims (4)

[Claims] 1. A load device equipped with a battery pack comprising a rechargeable battery and a non-volatile memory for storing a nominal charge capacity value and a residual charge capacity value of the battery, the load device detecting the load current of the battery. The current remaining charge capacity value of the battery is calculated from the current detector and the current detected by the current detector, and the integrated result, the initial remaining charge capacity value read from the memory, and the nominal charge capacity value. A current accumulating means for outputting, a calculating means for calculating a usable time of the battery from the current remaining charge capacity value from the current accumulating means and the load current, and use of the battery calculated by the calculating means. A display device for displaying the available time, and rewrites the remaining charge capacity value stored in the memory with the current remaining charge capacity value from the current accumulating means. Battery loading device, characterized in that had Unishi. 2. A charging device for charging a battery pack comprising a rechargeable battery and a non-volatile memory for storing a nominal charge capacity value and a residual charge capacity value of the battery, wherein a charging current of the battery is detected. Current detector and a current detector which integrates the currents detected by the current detector, and based on the accumulated result and the initial residual charge capacity value and the nominal charge capacity value read from the memory, the current residual charge capacity of the battery. And a current accumulating means for outputting a value, wherein the remaining charge capacity value stored in the memory is rewritten with the current remaining charge capacity value from the current accumulating means. apparatus. 3. The charging device according to claim 2, further comprising a display device for displaying the current remaining charge capacity value output from the current integrating means. 4. A rechargeable battery and a non-volatile memory for storing a nominal charge capacity value and a remaining charge capacity value of the battery, wherein a power supply terminal is derived from the battery and a memory terminal is connected from the non-volatile memory. A battery pack characterized by being derived.