Measurement system

Patent metadata

Field	Value
Publication number	US-9606188-B2
Application number	US-201313939485-A
Country	US
Kind code	B2
Filing date	Jul 11, 2013
Priority date	Jul 12, 2012
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A measurement system according to one aspect of the present invention includes a battery pack and at least one type of connected device to which the pack is connected. The pack includes a first detection device detecting a predetermined physical quantity in the pack and having a predetermined measurement range. The connected device includes a second detection device detecting a physical quantity the same as the predetermined physical quantity and having a measurement range different from the range of the first detection device. One of the pack and the connected device includes a receiving device and a measurement processing device that performs a predetermined measurement process by using one of: a detection-value-related information received by the receiving device; and a detection result by one device of the first detection device and the second detection device, the one device being provided in one of the pack and the connected device.

First claim

What is claimed is:

1. A measurement system comprising:
a battery pack containing a battery; and
at least one type of connected device to which the battery pack is to be connected,
wherein the battery pack comprises a first detection device that is configured to detect a predetermined physical quantity in the battery pack and that has a predetermined measurement range,
wherein the at least one type of connected device comprises a second detection device that is configured to detect a physical quantity and that has a measurement range different from the measurement range of the first detection device, wherein the physical quantity is the same as the predetermined physical quantity,
wherein one of the battery pack and the at least one type of connected device is a first device, and the other of the battery pack and the at least one type of connected device is a second device, the first device comprising:
a receiving device configured to receive a detection-value-related information that is transmitted from the second device and that directly or indirectly indicates a detection result by one of the first detection device and the second detection device; and
a measurement processing device configured to (i) perform a predetermined measurement process by using the detection-value-related information received by the receiving device in a case where the receiving device receives the detection-value-related information and (ii) to perform the measurement process by using a detection result by one device of the first detection device and the second detection device in a case where the receiving device does not receive the detection-value-related information, the measurement process comprising calculation of a remaining battery capacity of the battery, and the one device being provided in the first device, and

wherein the second device comprises a transmission device configured to transmit the detection-value-related information to the first device.

2. The measurement system according to claim 1 ,
wherein the first detection device and the second detection device are configured to detect an electric current to be discharged from the battery or to be charged to the battery, as the physical quantity.

3. The measurement system according to claim 2 ,
wherein the first detection device is configured to detect a value of the electric current in a predetermined first measurement range, and
wherein the second detection device is configured to detect a value of the electric current in a predetermined second measurement range lower than the first measurement range.

4. The measurement system according to claim 3 ,
wherein the at least one type of connected device comprises a battery charger that is configured to charge the battery, and
wherein the measurement processing device is further configured (i) to perform the measurement process by using a detection result by the first detection device in a case where discharging of the battery is performed (ii) to perform the measurement process by using a detection result by the second detection device in a case where charging of the battery by the battery charger is performed.

5. The measurement system according to claim 4 ,
wherein the battery pack comprises the receiving device and the measurement processing device, and
wherein the battery charger comprises the transmission device.

6. The measurement system according to claim 2 ,
wherein the at least one type of connected device comprises an electric device to be operated by an electric power of the battery,
wherein the battery pack comprises the receiving device and the measurement processing device,
wherein the electric device comprises the transmission device.

7. The measurement system according to claim 2 ,
wherein the second device comprises an electric-current integration device configured to calculate an electric-current integration value by performing a time-integration of a value of an electric current detected by one of the first detection device and the second detection device, the one being provided in the second device, and
wherein the transmission device is configured to transmit the electric-current integration value calculated by the electric-current integration device, as the detection-value-related information.

Assignees

• Makita Corp

Inventors

• Noda Masafumi
• Suzuki Hitoshi
• Fukumoto Masaaki
• Umemura Takuya

Classifications

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J7/44

  between battery management systems and power sources · CPC title

• H02J7/485 Primary

  with provisions for charging different types of batteries · CPC title