WO2010082564A1 - フューエルゲージ回路及びバッテリパック - Google Patents
フューエルゲージ回路及びバッテリパック Download PDFInfo
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- WO2010082564A1 WO2010082564A1 PCT/JP2010/050223 JP2010050223W WO2010082564A1 WO 2010082564 A1 WO2010082564 A1 WO 2010082564A1 JP 2010050223 W JP2010050223 W JP 2010050223W WO 2010082564 A1 WO2010082564 A1 WO 2010082564A1
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- Prior art keywords
- circuit
- terminal
- fuel gauge
- protection
- communication
- Prior art date
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- 239000000446 fuel Substances 0.000 title claims abstract description 71
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 230000006854 communication Effects 0.000 claims description 59
- 238000004891 communication Methods 0.000 claims description 59
- 238000007599 discharging Methods 0.000 claims description 7
- 230000007175 bidirectional communication Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 description 38
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 20
- 229910001416 lithium ion Inorganic materials 0.000 description 20
- 230000010355 oscillation Effects 0.000 description 15
- 238000012360 testing method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48135—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip
- H01L2224/48137—Connecting between different semiconductor or solid-state bodies, i.e. chip-to-chip the bodies being arranged next to each other, e.g. on a common substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
- H01L2224/491—Disposition
- H01L2224/4912—Layout
- H01L2224/49175—Parallel arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1304—Transistor
- H01L2924/1306—Field-effect transistor [FET]
- H01L2924/13091—Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/14—Integrated circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/19—Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
- H01L2924/1901—Structure
- H01L2924/1904—Component type
- H01L2924/19043—Component type being a resistor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a fuel gauge circuit and a battery pack, and more particularly, to a fuel gauge circuit for detecting a remaining battery level and a battery pack equipped with the fuel gauge circuit.
- a fuel gauge IC semiconductor integrated circuit that detects the remaining battery level by integrating the charge / discharge current of the lithium ion battery is:
- a battery pack is provided by being mounted on a printed circuit board together with a protection IC having a regulator function and housed in a case together with a lithium ion battery.
- FIG. 4 is a perspective view showing an appearance of an example of a battery pack
- FIG. 5 is a plan view showing an example of a circuit portion of a conventional battery pack.
- a printed circuit board 2 is fixed to the upper surface of a rectangular lithium ion battery 1.
- a fuel gauge IC 3 for detecting the remaining battery level and a protection IC 4 having a regulator function are fixed to the central portion of the printed circuit board 2.
- positive and negative power supply terminals 5 and 6 and a communication terminal 7 are provided at the end of the printed circuit board 2.
- the power terminals 5 and 6 are connected to the positive and negative electrodes of the lithium ion battery 1 through the through holes of the printed circuit board 2, and the power terminals 5 and 6 are connected to the positive and negative power terminals of a portable device (not shown).
- the communication terminal 7 is connected to the communication terminal of the portable device, and transmits and receives information such as the remaining battery level between the fuel gauge IC 3 and the portable device.
- Patent Document 1 discloses a circuit module provided with a protection circuit for protecting a lithium ion battery and a charge / discharge circuit for controlling charge / discharge of the lithium ion battery.
- the positive and negative power supply terminals 5 and 6 of the printed circuit board 2 are connected to the positive and negative power supply terminals of the fuel gauge IC 3 and the protection IC 4 through the through holes. Each is connected. Further, in the fuel gauge IC 3 and the protection IC 4, it is necessary to provide wiring for monitoring the power supply voltage (voltage at the terminal 5) of the lithium ion battery 1.
- wiring 8 is provided on the printed circuit board 2 in order to monitor the power supply voltage in the fuel gauge IC 3 and the protection IC 4.
- the wiring 8 connects the power supply terminal 5 on the printed circuit board 2, the power supply voltage monitoring terminal of the fuel gauge IC 3, and the power supply voltage monitoring terminal of the protection IC 4.
- the power supply terminal 5 extending in the X direction on the printed circuit board 2
- the power supply terminal 5 the power supply voltage monitoring terminal of the fuel gauge IC 3 and the power supply voltage monitoring terminal of the protection IC 4 are connected. Therefore, in the conventional battery pack, the width (dimension in the Y direction) of the printed circuit board 2 is increased.
- the width (dimension in the Y direction) of the printed circuit board 2 is increased.
- the present invention has been made in view of the above points, and an object of the present invention is to provide a fuel gauge circuit and a battery pack that can reduce the size of the substrate and can be used for thinning the battery.
- a fuel gauge circuit is a fuel gauge circuit that is disposed on a substrate together with a protection circuit that protects charging and discharging of a battery, and detects the remaining amount of the battery, A voltage monitor terminal provided on one side of the substrate facing the positive power supply terminal and connected to the positive power supply terminal of the substrate and connected to a voltage sensor in the circuit, and one side of the substrate facing the positive power supply terminal And a voltage through terminal connected to the voltage monitor terminal of the protection circuit provided on one side opposite to the protection circuit on the opposite side, and a connection between the voltage monitor terminal of the fuel gauge circuit and the voltage through terminal within the circuit Wiring.
- the size of the substrate can be reduced and the battery can be made thinner.
- FIG. 1 is a plan view showing a circuit portion of a battery pack according to an embodiment of the present invention.
- a printed circuit board 20 shown in FIG. 1 is used by being fixed to the upper surface of the rectangular lithium ion battery 1 shown in FIG.
- a fuel gauge IC 30 for detecting the remaining battery level and a protection IC 40 having a regulator function are arranged at the center of the printed circuit board 20 to form a circuit portion of a COB (Chip On Board) structure. is doing. Further, positive and negative power supply terminals 21 and 22 and a communication terminal 23 are provided at the end of the printed circuit board 20.
- COB Chip On Board
- the power terminals 21 and 22 are respectively connected to positive and negative electrodes of the lithium ion battery 1 through through holes (TH) of the printed circuit board 20, and the power terminals 21 and 22 are connected to positive and negative power terminals of the portable device.
- the communication terminal 23 is connected to the communication terminal of the mobile device.
- the terminals T1 to T5 are provided on one side of the fuel gauge IC 30 facing the power supply terminal 21, and the terminals T6 to T10 are provided on the opposite side of the fuel gauge IC 30 facing the protection IC 40.
- the terminal T1 is a voltage monitor terminal, and the terminal T1 is connected to the power supply terminal 21 of the printed circuit board 20 through the resistor R11.
- the terminal T1 is connected to the voltage sensor 31 in the fuel gauge IC 30 and connected to the terminal T6 by a wiring (for example, metal wiring) 32.
- the terminal T2 is a positive power supply terminal, and is connected to the terminal T22 of the protection IC 40 through the through holes 25a and 25b of the printed circuit board 20.
- the fuel gauge IC 30 is supplied with an operating current via the protection IC 40.
- Terminals T3 and T4 are current monitoring terminals and are connected to a current sensor in the fuel gauge IC 30.
- the terminal T5 is a negative power supply terminal, and is connected to the negative power supply terminal T16 of the protection IC 40 and the power supply terminal 22 of the printed circuit board 20 through the through holes 25c, 25d, and 25e of the printed circuit board 20.
- the terminal T6 is a voltage through terminal, connected to the wiring 32, and connected to the terminal T11 of the protection IC 40 facing each other by a wiring 26a such as a bonding wire.
- Terminals T7, T8, and T9 are communication terminals, and are connected to opposing terminals T12, T13, and T14 of the protective IC 40 that face each other by wirings 26b, 26c, and 26d such as bonding wires, for example.
- the fuel gauge IC 30 and the protection IC 40 communicate signals with each other using the wirings 26b, 26c, and 26d.
- the wiring 26b is for transmission / reception of a signal instructing to stop discharging
- the wiring 26c is for transmission / reception of a signal instructing to stop charging
- the wiring 26b is for transmission / reception of a control signal (enable).
- the terminal T10 is a communication terminal between portable devices, and is connected to the communication unit 33 in the fuel gauge IC 30 and is connected to the facing terminal T15 of the protection IC 40 facing each other by a wiring 26e such as a bonding wire.
- the protective IC 40 is provided with terminals T11 to T16 on one side facing the fuel gauge IC 30 and terminals T17 to T22 on one side facing the communication terminal 23 on the opposite side.
- a terminal T11 is a voltage monitor terminal and is connected to a terminal T6 of the fuel gauge IC 30 facing each other by a wiring 26a.
- Terminals T12, T13, and T14 are communication terminals, and are connected to opposing terminals T7, T8, and T9 of the opposing fuel gauge IC 30 by wirings 26b, 26c, and 26d.
- the terminal T15 is a communication terminal between portable devices, and is connected to a terminal T10 of the fuel gauge IC 30 facing each other by a wiring 26e and to a level shift circuit (L / S) 41 in the protection IC 40.
- the level shift circuit 41 level-shifts (steps down) the communication signal from the fuel gauge IC 30 and supplies it to the terminal T21 that is a communication terminal between portable devices.
- the terminal T21 is connected to the communication terminal 23 of the printed circuit board 20.
- the terminal T21 is provided with a protective element for preventing electrostatic breakdown.
- the terminal T16 is a negative power supply terminal and is connected to the power supply terminal 22 of the printed circuit board 20 through the through holes 25d and 25e of the printed circuit board 20.
- the terminal T17 is a positive power supply terminal, and is connected to the positive power supply terminal 21 through the through holes 25f and 25g of the printed circuit board 20 and the resistor R12 (R11 >> R12).
- the terminal T17 is connected to a regulator (REG) 42 in the protection IC 40.
- Terminal T18 is a short-circuit detection terminal and is connected to a resistor (305) not shown in FIG.
- Terminals T19 and T20 are control terminals for discharge control and charge control, respectively, and are connected to gates of MOS transistors (M11 and M12) for discharge control and charge control not shown in FIG.
- the stabilized power supply voltage output from the regulator 42 is supplied from the terminal T22 which is a positive power supply terminal to the terminal T2 of the fuel gauge IC 30 through the through holes 25b and 25a of the printed circuit board 20.
- FIG. 2 is a block diagram showing the configuration of the fuel gauge circuit of one embodiment of the present invention.
- FIG. 2 is a diagram showing a circuit configuration of the fuel gauge IC of the present embodiment, and is not a diagram showing the positional relationship between the components.
- the fuel gauge IC 200 shown in FIG. 2 corresponds to the fuel gauge IC 30 shown in FIG.
- the fuel gauge IC 200 includes a digital part 210 and an analog part 250.
- CPU 211, ROM 212, RAM 213, EEPROM 214, interrupt control unit 215, bus control unit 216, communication unit 217, serial communication unit 218, timer unit 219, power-on reset unit 220, register 221, test port state A setting circuit 222, a test control circuit 223, and a filter circuit 290 are provided in the digital unit 210.
- the CPU 211, ROM 212, RAM 213, EEPROM 214, interrupt control unit 215, bus control unit 216, communication unit 217, serial communication unit 218, timer unit 219, and register 221 are connected to each other via an internal bus.
- the CPU 211 executes a program stored in the ROM 212 to control the fuel gauge IC 200 as a whole, and executes processing for calculating the remaining battery level by integrating the charge / discharge current of the battery.
- the RAM 213 is used as a work area.
- the EEPROM 214 stores trimming information and the like.
- the interrupt control unit 215 is supplied with an interrupt request from each unit of the fuel gauge IC 200, generates an interrupt according to the priority of each interrupt request, and notifies the CPU 211.
- the bus control unit 216 performs arbitration control to determine which circuit unit preferentially uses the internal bus so that no competition occurs between the circuit units.
- the communication unit 217 communicates with the protection IC 304 via the ports 230, 231, and 232.
- the serial communication unit 218 is connected to the protection IC 304 via the port 233, and communicates with the mobile device via the protection IC 304.
- the protection IC 304 corresponds to the protection IC 40 in FIG. 1
- the ports 230, 231, and 232 correspond to the terminals T7, T8, and T9 in FIG. 1, respectively
- the serial communication unit 218 and the port 233 1 corresponds to the communication unit 33 and the terminal T10.
- the timer unit 219 counts the system clock, and the count value is referred to the CPU 211.
- the power-on reset unit 220 detects that the power supply voltage Vdd supplied to the port 235 connected via the filter circuit 290 has risen, generates a reset signal, and supplies the reset signal to each unit of the fuel gauge IC 200.
- the test port state setting circuit 222 short-circuits between the test ports 237 and 238 and the test control circuit 223 according to the information held in the register 221, and also connects the test control circuit 223 connected to the test ports 237 and 238. Set the input to a predetermined level.
- test control circuit 223 When the test control circuit 223 is supplied with the input of the test ports 237 and 238, the test control circuit 223 changes the state of the internal circuit in accordance with the input and can test the internal circuit of the fuel gauge IC 200.
- an oscillation circuit 251 In the analog unit 250, an oscillation circuit 251, a crystal oscillation circuit 252, a selection control circuit 253, a frequency divider 254, a voltage sensor 255, a temperature sensor 256, a current sensor 257, a multiplexer 258, and a delta-sigma modulator 259 are provided. ing.
- the oscillation circuit 251 is an oscillator having a PLL and outputs an oscillation signal having a frequency of several MHz.
- the crystal oscillation circuit 252 oscillates with a crystal resonator externally attached to the ports 271 and 272, and outputs an oscillation signal having a frequency of several MHz.
- the oscillation frequency of the crystal oscillation circuit 252 is highly accurate with respect to the oscillation frequency of the oscillation circuit 251.
- the selection control circuit 253 selects an oscillation frequency signal output from either the oscillation circuit 251 or the crystal oscillation circuit 252 based on the selection signal supplied from the port 273, and supplies it as a system clock to each part of the fuel gauge IC 200.
- the selection control circuit 253 generates a reset signal RST and a control signal CNT. By the way, when the selection signal is not supplied from the port 273, the selection control circuit 253 selects, for example, the oscillation frequency signal output from the oscillation circuit 251.
- the frequency divider 254 divides the system clock to generate various clocks and supplies them to each part of the fuel gauge IC 200.
- the voltage sensor 255 detects the power supply voltage of the battery 301 externally attached to the port 274 and supplies the analog detection voltage to the multiplexer 258.
- the temperature sensor 256 detects the environmental temperature of the fuel gauge IC 200 and supplies an analog detected temperature to the multiplexer 258.
- Both ends of a current detection resistor 303 are connected to the ports 276 and 277, and the current sensor 257 detects the current flowing through the resistor 303 from the potential difference between the ports 276 and 277 and supplies an analog detection current to the multiplexer 258. .
- voltage sensor 255 and port 274 correspond to voltage sensor 31 and terminal T1 in FIG. 1, respectively, and ports 276 and 277 correspond to terminals T3 and T4 in FIG. 1, respectively.
- the multiplexer 258 sequentially selects an analog detection voltage, an analog detection temperature, and an analog detection current and supplies them to the delta-sigma modulator 259.
- the delta sigma modulator 259 supplies the pulse density modulation data to the CPU 211 via the internal bus by performing delta sigma conversion on each detected value.
- the CPU 211 performs digital filter processing to digitize the detected voltage, detected temperature, and detected current. Further, the CPU 211 calculates the remaining battery level by integrating the charging / discharging current of the battery. At this time, the detected temperature is used for temperature correction.
- the fuel gauge IC 200 described above is housed in a housing 310 together with a battery 301, a current detection resistor 303, a protection IC 304, a resistor 305, and a switch 306 to form a battery pack 300.
- the protection IC 304 in FIG. 2 corresponds to the protection IC 40 in FIG.
- the positive electrode of the battery 301 and the power supply input terminal of the protection IC 304 are connected to the terminal 311 of the battery pack 300, and the power supply output terminal of the protection IC 304 is connected to the port 235 of the power supply voltage Vdd of the fuel gauge IC200.
- the terminal 312 is connected to the ground terminal of the protection IC 304 through the resistor 305 and is connected to a connection point with the port 277 of the current detection resistor 303 through the switch 306.
- the protection IC 304 stabilizes the voltage between the terminals 311 and 312 and performs protection by blocking the switch 306 when the voltage is out of a predetermined range.
- connection point between the current detection resistor 303 and the port 276 is connected to the port 236 of the power supply voltage Vss of the fuel gauge IC 200.
- the port of the protection IC 304 is connected to the terminal 313 of the battery pack 300. Note that the terminals 311, 312, and 313 in FIG. 2 correspond to the power terminals 21 and 22 and the communication terminal 23 in FIG. 1, respectively.
- FIG. 3 is a block diagram showing the configuration of the protection circuit according to the embodiment of the present invention.
- the protection IC 400 shown in FIG. 3 corresponds to the protection IC 40 shown in FIG.
- the protection IC 400 is provided with ports 401 to 403, ports 405 to 408, and ports 410 to 414.
- the level shift circuit 415 in FIG. 3 corresponds to the level shift circuit 41 in FIG. 1, and the other input / output terminal of the level shift circuit 415 is connected to a port 411 corresponding to the inter-portable-device communication terminal T21 in FIG. .
- the port 411 is provided with a protective element for preventing electrostatic breakdown.
- the regulator 416 stabilizes the power supply voltage supplied from the port 402 and supplies it to each part of the protection IC 400. Further, in order to supply the stabilized power supply voltage to the fuel gauge IC 30, the output terminal of the regulator 416 is connected to the port 410 corresponding to the positive power supply terminal T22 of FIG.
- 3 corresponds to the voltage monitor terminal T11 in FIG. 1, and is connected to the overcharge detection circuit 421 and the overdischarge detection circuit 422 in the protection IC 400.
- the port 405 in FIG. 3 corresponds to the negative power supply terminal T16 in FIG.
- Ports 406 and 407 in FIG. 3 correspond to the control terminal T19 for discharge control and the control terminal T20 for charge control in FIG. 1, respectively, and are connected to the gates of external MOS transistors M11 and M12, respectively.
- FIG. 3 corresponds to the short-circuit detection terminal T18 of FIG. 1, and is connected to an external resistor R20.
- the MOS transistors M11 and M12 in FIG. 3 correspond to the switch 306 in FIG. 2, and the resistor R20 in FIG. 3 corresponds to the resistor 305 in FIG.
- the communication circuit 417 performs communication with the communication unit 217 in FIG.
- the protection IC 400 includes an overcharge detection circuit 421, an overdischarge detection circuit 422, a charge overcurrent detection circuit 423, a discharge overcurrent detection circuit 424, and a short circuit detection circuit 604.
- the overcharge detection circuit 421 detects overcharge of the lithium ion battery 1 from the voltage at the port 403 and supplies a detection signal to the oscillator 426 and the logic circuit 428.
- the overdischarge detection circuit 422 detects overdischarge of the lithium ion battery 1 from the voltage at the port 403 and supplies a detection signal to the oscillator 426 and the logic circuit 430.
- the charge overcurrent detection circuit 423 detects an overcurrent in which the current flowing through the MOS transistor M11 and the MOS transistor M12 becomes excessive from the voltage of the port 408, and supplies a detection signal to the oscillator 426 and the logic circuit 428.
- the discharge overcurrent detection circuit 424 detects an overcurrent in which the currents flowing through the MOS transistors M11 and M12 are excessive from the voltage at the port 408, and supplies a detection signal to the oscillator 426 and the logic circuit 430.
- the short circuit detection circuit 604 detects a short circuit between the ports 402 and 408 from the voltage of the port 408 and supplies a detection signal from the delay circuit 431 to the logic circuit 430.
- the counter circuit 427 counts the clock signal supplied from the oscillator 426, and the signal output from the counter circuit 427 is supplied to the logic circuits 428 and 430.
- the overcharge detection circuit 421 or the charge overcurrent detection circuit 423 outputs a detection signal during charging (the MOS transistors M11 and M12 are on)
- the oscillator 426 oscillates and outputs a clock signal
- the counter circuit 427 When the clock signal is counted by a predetermined value, a high level output is supplied to the logic circuit 428.
- the logic circuit 428 When the logic circuit 428 is supplied with the high level output of the counter circuit 427 after being supplied with the detection signal, the logic circuit 428 sets the control signal to be supplied to the gate of the MOS transistor M12 to stop charging, and this control signal. Is shifted by a predetermined value by the level shift circuit 429 and supplied from the port 407 to the gate of the MOS transistor M12. Thereby, charge of the lithium ion battery 1 stops. This level shift is performed with respect to the port 405 because the other end of the resistor R20 having one end connected to the port 408 has a lower potential.
- the oscillator 426 oscillates and outputs a clock signal.
- the clock signal is counted by a predetermined value, a high level output is supplied to the logic circuit 430.
- the logic circuit 430 sets the control signal supplied to the gate of the MOS transistor M11 to stop discharging, and this control signal Is supplied from the port 406 to the gate of the MOS transistor M11.
- the detection signal of the short circuit detection circuit 604 is delayed by the delay circuit 431 in the same manner as the delay by the counter circuit 427 and supplied to the logic circuit 430.
- the logic circuit 430 is supplied to the gate of the MOS transistor M11 to stop discharging.
- the signal is set to low level, and this control signal is supplied from the port 406 to the gate of the MOS transistor M11. Thereby, the discharge of the lithium ion battery 1 is stopped.
- the logic circuits 428 and 430 are connected to the communication circuit 417, and the charge stop or discharge stop signal output from the logic circuits 428 and 430 is supplied from the communication circuit 417 to the communication unit 217 of the fuel gauge IC 200. Conversely, a charge stop or discharge stop signal may be supplied from the communication unit 217 of the fuel gauge IC 200 to the logic circuits 428 and 430 via the communication circuit 417.
- the voltage monitor terminal T1 and the voltage through terminal T6 are connected by the wiring 32 in the fuel gauge IC 30, it is necessary to provide a wiring extending in the X direction on the printed circuit board 20.
- the width dimension (dimension in the Y direction) of the printed circuit board 20 can be reduced, and the lithium ion battery 1 can be made thinner.
- the communication terminals T7, T8, T9 of the fuel gauge IC 30 and the communication terminals T12, T13, T14 of the protection IC 40 are provided on the opposing sides of the fuel gauge IC 30 and the protection IC 40, respectively, and the communication terminals T7, T8, T9 are provided. Since the communication terminals T12, T13, and T14 face each other, the wiring lengths of the wirings 26b, 26c, and 26d that connect the communication terminals T7, T8, and T9 and the communication terminals T12, T13, and T14, respectively, are minimized. be able to.
- the inter-portable device communication terminal T10 of the fuel gauge IC 30 and the inter-portable device communication terminal T15 of the protection IC 40 are respectively provided on opposite sides of the fuel gauge IC 30 and the protection IC 40. Since the inter-device communication terminal T15 is opposed, the wiring length of the wiring 26e connecting the inter-mobile device communication terminal T10 and the inter-mobile device communication terminal T15 can be minimized.
- level shift circuit 41 in the protection IC 40 bidirectional communication can be performed between the fuel gauge IC 30 having a different signal voltage and the portable device. Furthermore, electrostatic breakdown of the fuel gauge IC 30 can be prevented by providing a protection element for preventing electrostatic breakdown at the communication terminal T21 between portable devices of the protection IC 40.
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Abstract
Description
図1は、本発明の一実施形態のバッテリパックの回路部を示す平面図である。図1に示すプリント基板20は、図4に示す角形のリチウムイオン電池1の上面に固定されて使用される。
図2は、本発明の一実施形態のフューエルゲージ回路の構成を示すブロック図である。図2は本実施形態のフューエルゲージICの回路構成を示す図であり、各構成部分同士の位置関係を正確に示す図ではない。図2に示すフューエルゲージIC200は、図1に示すフューエルゲージIC30に相当する。概略すると、フューエルゲージIC200はデジタル部210とアナログ部250とから構成される。
図3は、本発明の一実施形態の保護回路の構成を示すブロック図である。図3に示す保護IC400は図1に示す保護IC40に相当する。図3に示すように、保護IC400にはポート401~403、ポート405~408、ポート410~414が設けられている。
21、22 電源端子
23 通信端子
25a~25g スルーホール
26a~26e 配線
30 フューエルゲージIC
31 電圧センサ
32 配線
33 通信部
40 保護IC
41 レベルシフト回路
T1~T22 端子
Claims (4)
- 電池の充放電を保護する保護回路と共に基板上に配設され、前記電池の残量を検出するフューエルゲージ回路であって、
前記基板の正の電源端子に対向する一辺に設けられ前記基板の正の電源端子に接続されると共に回路内部の電圧センサに接続される電圧モニタ端子と、
前記基板の正の電源端子に対向する一辺とは逆側の前記保護回路に対向する一辺に設けられ前記保護回路の電圧モニタ端子に接続される電圧スルー端子と、
前記フューエルゲージ回路の電圧モニタ端子と前記電圧スルー端子間を回路内部で接続する配線と、
を有することを特徴とするフューエルゲージ回路。 - 請求項1記載のフューエルゲージ回路において、
前記保護回路に対向する一辺に設けられ、前記保護回路の通信端子と接続されて双方向通信を行う通信端子を有することを特徴とするフューエルゲージ回路。 - 請求項2記載のフューエルゲージ回路において、
前記保護回路に対向する一辺に設けられ前記保護回路の携帯機器間通信端子と接続される携帯機器間通信端子を有し、
前記保護回路を介して前記回路内部の通信部と前記電池が搭載される携帯機器の通信部との間で双方向通信を行うことを特徴とするフューエルゲージ回路。 - 電池の一面に、前記電池の充放電を保護する保護回路と前記電池の残量を検出する請求項3記載のフューエルゲージ回路を有する基板を配設したバッテリパックであって、
前記保護回路は、前記フューエルゲージ回路の通信部と前記携帯機器の通信部との間で通信される通信信号のレベルシフトを行うレベルシフト回路を有することを特徴とするバッテリパック。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/143,949 US8658300B2 (en) | 2009-01-14 | 2010-01-12 | Fuel gauge circuit and battery pack |
KR1020117011466A KR101660814B1 (ko) | 2009-01-14 | 2010-01-12 | 연료 게이지 회로 및 배터리팩 |
CN201080004531.8A CN102282717B (zh) | 2009-01-14 | 2010-01-12 | 燃料仪电路以及电池组 |
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JP2009006161A JP5316008B2 (ja) | 2009-01-14 | 2009-01-14 | フューエルゲージ回路及びバッテリパック |
JP2009-006161 | 2009-01-14 |
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WO2010082564A1 true WO2010082564A1 (ja) | 2010-07-22 |
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PCT/JP2010/050223 WO2010082564A1 (ja) | 2009-01-14 | 2010-01-12 | フューエルゲージ回路及びバッテリパック |
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US (1) | US8658300B2 (ja) |
JP (1) | JP5316008B2 (ja) |
KR (1) | KR101660814B1 (ja) |
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JP2013211974A (ja) * | 2012-03-30 | 2013-10-10 | Renesas Electronics Corp | 電池制御用半導体装置及び電池パック |
US20140244193A1 (en) * | 2013-02-24 | 2014-08-28 | Fairchild Semiconductor Corporation | Battery state of charge tracking, equivalent circuit selection and benchmarking |
KR101450221B1 (ko) | 2013-04-17 | 2014-10-15 | 주식회사 아이티엠반도체 | 배터리 보호회로 모듈 패키지 |
DE102014212247A1 (de) | 2014-06-26 | 2015-12-31 | Robert Bosch Gmbh | Elektrischer Verbinder für ein Batteriemodul |
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KR101660814B1 (ko) | 2016-09-28 |
US20110274952A1 (en) | 2011-11-10 |
JP5316008B2 (ja) | 2013-10-16 |
KR20110111363A (ko) | 2011-10-11 |
CN102282717B (zh) | 2014-03-26 |
US8658300B2 (en) | 2014-02-25 |
JP2010165532A (ja) | 2010-07-29 |
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