WO2007145240A1 - 2次電池充電回路 - Google Patents
2次電池充電回路 Download PDFInfo
- Publication number
- WO2007145240A1 WO2007145240A1 PCT/JP2007/061880 JP2007061880W WO2007145240A1 WO 2007145240 A1 WO2007145240 A1 WO 2007145240A1 JP 2007061880 W JP2007061880 W JP 2007061880W WO 2007145240 A1 WO2007145240 A1 WO 2007145240A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- secondary battery
- current
- charging
- circuit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0045—Converters combining the concepts of switch-mode regulation and linear regulation, e.g. linear pre-regulator to switching converter, linear and switching converter in parallel, same converter or same transistor operating either in linear or switching mode
Definitions
- the present invention relates to a secondary battery charging circuit that charges a secondary battery such as a lithium ion battery, for example.
- a battery pack has a built-in protection circuit so that charging voltage and charging current do not become excessive.
- Patent Document 1 discloses a charging circuit which controls a charging voltage in a step-up circuit so that a charging current becomes constant in order to reduce power loss during charging.
- Patent Document 2 discloses a storage battery charging device having a circuit that raises the charging voltage as the battery voltage of the storage battery rises.
- Patent Document 1 Japanese Patent Application Laid-Open No. 07-143683
- Patent Document 2 Japanese Utility Model Application Publication No. 57-183029
- the present inventors limit the input voltage and input current from the power supply and convert them into the specified charging voltage and charging current.
- the neupolar transistor or the field effect transistor is damaged or the protection circuit does not operate normally. It was examined whether it could not completely eliminate the problem that high power supply voltage was directly input to the secondary battery and charging could be continued at a voltage higher than the specified full charge voltage. [0005] As a result of examination, the inventors considered that the above situation could be almost completely eliminated by setting the power supply voltage to the full charge voltage or less. In this case, the charging method and the method of providing the protection circuit Unlike the case where the power supply voltage is high, it was necessary to take new measures.
- the object of the present invention is to ensure that the secondary battery can not be overcharged even if a transistor or the like that controls the charging voltage or charging current is damaged or the protection circuit does not operate normally. High, to provide a charging circuit.
- the present invention charges a secondary battery with an input power supply voltage.
- the power supply voltage is lower than the full charge voltage of the secondary battery. It was set, and it was set to go!
- the power supply voltage detection circuit (3: FIG. 5) for detecting the power supply voltage is provided, and the power supply voltage detection circuit activates the charging operation when the power supply voltage is detected to be lower than the full charge voltage.
- the current path connecting the power supply voltage and the secondary battery includes a first switch element (FETO: FIG. 5) for opening and closing the current path, and the power supply voltage detection circuit has the power supply voltage higher than the full charge voltage. It is preferable that the first switch element be configured to be turned off when it is detected.
- the power supply voltage temporarily becomes high if, for example, the power supply voltage is input erroneously, such as when AC adapters having different output voltages are connected, or the power supply voltage is erroneously input. Even if it becomes, it is possible to prevent overcharging by them.
- the secondary battery includes a current circuit (20) for controlling a current supplied from the power supply voltage to the secondary battery, and a booster circuit (30) for boosting the power supply voltage.
- the current circuit When the voltage is lower than the power supply voltage, the current circuit operates to perform constant current charging without boosting, and when the voltage of the secondary battery is higher than the power supply voltage and lower than the full charge voltage, the voltage boosting circuit It is good if it is configured to operate and perform constant current charging with boosting.
- the secondary battery can be fully charged using a power supply voltage lower than the full charge voltage.
- the switching element that generates the booster action is broken, the output voltage is lowered, and other failure factors that cause the output voltage to rise can be made extremely small. Therefore, the safety is greatly improved in the case of using the booster circuit as compared with the case of inputting a high power supply voltage.
- a differential voltage detection circuit (60: FIG. 9) for detecting a differential voltage between the power supply voltage and the voltage of the secondary battery is provided, and during the period of constant current charging without the step-up, It is preferable that the voltage boosting circuit is started to shift to the constant current charging accompanied with the voltage boosting on the basis of the fact that the voltage differential detecting circuit detects that the voltage difference becomes equal to or less than a reference value.
- a current drop detection circuit (52: FIG. 10) for detecting a drop in charge current is provided, and the charging current is a predetermined amount by the current detection circuit during the period of constant current charging. It is preferable that the booster circuit is configured to start the constant-current charging accompanied with the boosting based on the detection of the decrease.
- the booster circuit can be started at an appropriate timing.
- the battery voltage detection circuit (40: FIG. 12) for detecting the voltage of the secondary battery is provided, and the current circuit is based on the voltage value of the secondary battery. It is good to be configured to switch.
- the current circuit sets the charging current to the first current value.
- the control may be configured to control the charging current to a current value smaller than the first current value when the voltage of the secondary battery is lower than the minimum operating voltage.
- the system includes a control terminal (tl: FIG. 15) to which a signal representing an operation mode of a system power system operated by voltage supply of a secondary battery is input, and the current circuit is based on the signal of the control terminal.
- a control terminal to which a signal representing an operation mode of a system power system operated by voltage supply of a secondary battery is input, and the current circuit is based on the signal of the control terminal.
- the size of the charging current may be switched.
- the power supply voltage for charging is the system drive power supply while the secondary battery is charging. May be shared.
- the system may be interrupted by the power supply voltage. Therefore, as in the above configuration, by switching the charging current to a smaller value depending on whether the voltage of the secondary battery is low or the system startup status, the power supplied by the power supply can be used to charge the secondary battery and drive the system. You can share well with both.
- a fuse (82: FIGS. 16 and 17) provided on a current path connecting the power supply voltage and the secondary battery, and a voltage / current detection for detecting the power supply voltage and the input current.
- the fuse may be configured to be cut.
- a rectifying element capable of blocking the current from the secondary battery so that the current from the secondary battery does not flow to the second switching element when the second switch element is turned on D1: Good if equipped with Fig. 16) or third switch element (FET2: Fig. 17).
- FIG. 1 is a block diagram showing a basic configuration of a charging system according to a first embodiment of the present invention.
- FIG. 2 is a developed block diagram of a charging circuit of the charging system of FIG. 1;
- FIG. 3 is a configuration diagram showing an example of a circuit configuration of the charging system of the first embodiment.
- FIG. 4 is a configuration diagram showing an example of a circuit configuration of the charging system of the first embodiment.
- FIG. 5 is a charge characteristic graph illustrating the operation content of the charge system of the first embodiment.
- FIG. 6 is a block diagram showing a basic configuration of a charging system according to a second embodiment.
- FIG. 7 is a configuration diagram showing an example of a circuit configuration of a charging system according to a second embodiment.
- FIG. 8 A flow chart showing an example of the operation procedure of the charging system of the second embodiment.
- FIG. 9 is a circuit diagram showing a charging system according to a third embodiment.
- FIG. 10 is a circuit diagram showing a charging system according to a fourth embodiment.
- FIG. 11 is a charge characteristic diagram showing the operation of the charge system of the fourth embodiment.
- FIG. 12 is a circuit diagram showing a charging system according to a fifth embodiment.
- FIG. 13 is a charge characteristic diagram showing the operation of the charge system of the fifth embodiment.
- FIG. 14 is a charge characteristic diagram showing a modification of the operation of the charge system of the fifth embodiment.
- FIG. 15 is a circuit diagram showing a charging system according to a sixth embodiment.
- FIG. 16 is a circuit diagram showing a charging system according to a seventh embodiment.
- FIG. 17 A circuit configuration diagram showing a modification of the configuration for cutting a fuse.
- FIG. 18 is a circuit diagram showing a charging system according to an eighth embodiment.
- FIG. 19 is a circuit diagram showing a first modified example in which power can be supplied to the secondary battery power system circuit via the charging circuit.
- FIG. 20 is a circuit diagram showing a second modified example in which power can be supplied to the secondary battery power system circuit via the charging circuit.
- FIG. 1 is a block diagram showing a basic configuration of a charging system according to a first embodiment of the present invention.
- Fig. 2 is a block diagram showing the configuration of the charging circuit
- Figs. 3 and 4 are configuration diagrams showing an example of the circuit configuration of this charging circuit
- Fig. 5 shows a charging characteristic graph that explains the operation content of this charging system.
- the charging system of this embodiment charges a secondary battery E2, such as a lithium ion battery, with a power supply voltage supplied from a power supply device 2, such as an AC adapter, for example.
- a charging circuit 4 is provided to input a power supply voltage and output a charging voltage to the secondary battery E2.
- a general charging method such as a lithium ion battery is as follows. That is, when the charging rate is small, the lithium ion battery starts charging by applying a voltage slightly higher than the battery voltage in this state where the voltage between terminals is low. Then, as the charging rate increases, the voltage between the terminals increases, and a prescribed full charge voltage (for example, 4) is prevented to prevent structural deterioration of the battery. Up to IV and 4.2V). When the full charge voltage is reached, constant voltage charging is performed by continuing to apply the full charge voltage, and the charge current becomes smaller as the charge rate progresses. Then, when the charging current becomes sufficiently small, the charging is completed.
- the power supply voltage input from the power supply device 2 is set to a voltage lower than the full charge voltage of the secondary battery E 2!
- the power supply voltage is not particularly limited, but can be set to, for example, 3.5 V to 4. OV.
- charging circuit 4 includes constant current circuits 20 and 20B for controlling the current output to the side of secondary battery E2, and voltage regulator 30 capable of performing a boosting operation by switching control.
- a voltage detection circuit 40 for detecting the charging voltage applied to the secondary battery E2, and a switching control circuit 50 for switching the operation of the constant current circuits 20 and 20B and the voltage regulator 30 based on the detection value of the voltage To prepare.
- FIG. 2 is a diagram showing a circuit configuration that does not include the dashed-dotted line portion
- FIG. 4 is a diagram that shows the circuit configuration that includes the dashed-dotted line portion.
- constant current circuit 20 includes a transistor (bipolar transistor) Q1 that controls the output current by changing the on resistance in the operation of the non-saturation region or switching operation, a resistor R1, etc. And a constant current control circuit 21 for detecting the input current to control the transistor Q1.
- the constant current circuit 20 performs constant current operation to keep the output current constant, and turns on the transistor Q1 based on a signal from the switching control circuit 50 to directly output the power supply voltage to the circuit in the subsequent stage. And a protection operation state that shuts off the input of the power supply voltage by turning off the transistor Q1.
- voltage regulator 30 stores energy by flowing current, transistor L1 which flows energy to transistor L1 by switching operation (field effect transistor) FET1, and transistor FET1.
- a rectifier element D1 that prevents reverse current flow from the output side when it is on, and a SW control circuit that performs on / off control of the transistor FET1 3 It consists of 1 and.
- the voltage regulator 30 smoothes the current output from the constant current circuit 20 with the reactor L1, and supplies the smoothed current to the secondary battery E2.
- the transistor FET is operated at a predetermined frequency and a predetermined duty ratio to perform a boosting operation, and when the output voltage reaches a full charge voltage, this voltage is maintained.
- a power supply voltage (for example, 4.0 V) lower than the full charge voltage (for example, 4.2 V) is supplied from the power supply device 2 when normal.
- the operating state of charging circuit 4 is, as shown in FIG. 5, the state of constant current charging without boosting in which only constant current circuit 20 operates, and boosting in which constant current circuit 20 and voltage regulator 30 operate. There are three states: a state of constant current charge and a state of constant voltage charge in which only the voltage regulator 30 operates.
- the switching of the operation state is performed by outputting a stop signal or an operation signal from the switching control circuit 50 to the constant current control circuit 21 and the SW control circuit 31 based on the detection of the battery voltage.
- Switch control circuit 50 operates constant current circuit 20 when the battery voltage during charging is lower than the full charge voltage, and outputs a stop signal to constant current control circuit 21 when the full charge voltage is reached, and transistor Q1. Turn on. Further, the voltage regulator 30 is not operated until the battery voltage being charged reaches near the power supply voltage, and when it reaches near the power supply voltage, an operation signal is output to the SW control circuit 31 to start the boosting operation.
- the operation timing of the voltage regulator 30 is, for example, approximately equal to or slightly lower than the power supply voltage, and a reference voltage of the voltage is set, and this reference voltage is compared with the battery voltage. Can be generated by If the power supply voltage is 4. OV, the reference voltage can be set to, for example, 3.9 V to 4. OV.
- constant current circuit 20 outputs a constant current (eg, 1 C: a current value for charging the battery capacity in one hour), passes through voltage regulator 30, and It is input to the battery. As a result, constant current charging of 1 C is performed.
- the constant voltage charging of 1 C is maintained by the voltage regulator 30 performing a boosting operation to supply the current to the secondary battery E 1.
- the current detection resistor R1 of the constant current circuit 20 when the voltage regulator 30 operates, the current detection resistor R1 of the constant current circuit 20 also supplies the charging current, and the switching current of the voltage regulator 30 also flows.
- the constant current control circuit 21 is configured to convert the output current and the detected current so that a constant current of 1 C is output to the secondary battery excluding the addition of this current. Do. As shown in FIG. 3, the current detection is performed at the front stage of the voltage regulator 30. By providing a current detection resistor at the rear stage of the voltage regulator 30 and performing it at the rear stage, the above conversion process can be omitted. Again.
- constant current circuit 20 is stopped and only voltage regulator 30 operates, transistor Q1 of the constant current circuit is turned on, and voltage regulator 30 performs a constant voltage control operation to fully charge. Maintain voltage output of voltage. Then, this voltage is applied to the secondary battery E2 to perform constant voltage charging.
- the secondary battery E2 is fully charged using a power supply voltage lower than the full charge voltage.
- switching control circuit 50 sends a constant error signal to constant current control circuit 21 for a predetermined period of time. It is acceptable that the output is made, the transistor Q1 is turned off by this abnormal signal, and the supply of the power supply voltage from the power supply unit 2 is cut off for a predetermined time.
- This charging circuit is provided with a second constant current circuit 20 B that directly outputs a current to the secondary battery E 2 without passing through the voltage regulator 30 in addition to the configuration similar to FIG. 3. That is, as shown in FIG. 4, the second constant current circuit 20B has a transistor Q2 connected between the power supply voltage terminal and the terminal of the secondary battery E2 without a relay or the like.
- the circuit that controls the operation of the transistor Q2 is expressed in one block together with the control of the transistor Q1 by the constant current control circuit 21. However, it may be a separate control circuit!
- the second constant current circuit 20 B is stopped to turn off the transistor Q 2, and the first constant current circuit 20 and the voltage regulator 30 operate to boost the voltage. Perform constant current charge accompanying.
- the subsequent operation is similar to the charging circuit of FIG.
- a rectifying element D2 in which an anode capable of continuing to supply current to the reset L1 even when the input of the voltage regulator 30 is disconnected to the voltage regulator 30 is connected to the ground terminal. Is provided.
- the charging system of this embodiment since the power supply voltage is set lower than the full charge voltage, the case where the transistor for controlling the charge current or the charge voltage is broken or the like is broken. However, it is possible to avoid overcharging in which no voltage higher than the full charge voltage is applied to the secondary battery E2.
- FIG. 6 is a block diagram showing the basic configuration of the charging system of the second embodiment
- FIG. 7 is a configuration diagram showing an example of its circuit configuration.
- the charging system of the second embodiment is characterized in that the power supply voltage is set to a voltage lower than the full charging voltage, constant current charging without boosting according to the battery voltage at the time of charging, and constant current charging with boosting.
- the point of performing constant voltage charging with a full charge voltage is substantially the same as the charging system of the first embodiment.
- the charging system of the second embodiment has a power supply voltage detection circuit 3 for detecting the input voltage from the power supply device 2 in addition to the above configuration, and the power supply voltage is less than or equal to the full charge voltage. Power is also made possible to operate the charge processing circuit (constant current circuit or voltage regulator). Also, when the power supply voltage is equal to or higher than the full charge voltage, the input of the power supply voltage is shut off. As shown in FIG. 7, power supply voltage detection circuit 3 turns off transistor FETO of the constant current circuit based on divided resistors R 2 and R 3 that output a detection voltage, and based on this detection voltage, the voltage regulator 30 The detection control & constant current control circuit 25 performs detection control such as outputting a start signal to the SW control circuit 31. The detection control & constant current control circuit 25 doubles as a control circuit of a constant current circuit which controls the transistor FETO at the time of constant current charging to output a constant current.
- detection control & constant current control circuit 25 supplies a start signal to SW control circuit 31 only when the power supply voltage is less than or equal to the full charge voltage, and controls the voltage regulator to be operable. And performs control to turn off the transistor FETO that performs constant current control when the power supply voltage is equal to or higher than the full charge voltage, and to cut off the current to the secondary battery E2 side.
- the transistor FET 2 for performing synchronous rectification as a rectifying element of the voltage regulator 30 is applied, thereby reducing loss in the voltage regulator 30.
- a field effect transistor FET1 as a control transistor of a constant current circuit to achieve high withstand voltage and low loss, even when a high voltage is applied as a power supply voltage, current input can be cut off.
- FIG. 8 shows a flowchart representing an example of the operation procedure of this charging system.
- the power supply voltage detection circuit 3 detects the voltage of the power supply voltage (step S2). Then, check whether the voltage is below the full charge voltage (Step S3). If it is higher than the full charge voltage, the control of the detection control & constant current control circuit 25 turns off the transistor FETO of the constant current circuit. The start signal of is left negated.
- Step S4 the detection control & constant current control circuit 25 outputs a start signal to the SW control circuit 31 and the voltage regulator 30 becomes operable.
- step S5 the constant current circuit and the voltage regulator 30 cooperate to perform the charging operation according to the battery voltage.
- step S6 the start signal to the SW control circuit 31 is negated.
- a high power supply voltage is accidentally input due to a power supply apparatus having a high output voltage being connected or a failure of the power supply apparatus. Even if this happens, it can be shut off to prevent the secondary battery E2 from overcharging.
- FIG. 9 shows a circuit configuration diagram of the charging system of the third embodiment.
- the charging system of the third embodiment has substantially the same configuration as the charging system of the first embodiment, and only the configuration for generating the operation timing of the voltage regulator 30 is changed.
- the difference voltage detection circuit 60 detects the difference voltage between the power supply voltage and the battery voltage as the timing of switching operation of the transistor FET1 to start the boosting operation, and this difference voltage is The timing at which the voltage is reached, for example, the timing at which the supply voltage EO—battery voltage El ⁇ reference voltage “0.5 to 0. 2 V” is detected. Then, at this timing, a detection signal is output from the differential voltage detection circuit 60, and the switching control circuit 50 outputs an operation signal to the SW control circuit 31 based on this detection signal. As a result, it is possible to shift to constant current charging with constant current charge power boosting without boosting at appropriate timing.
- the voltage detection circuit 40 for detecting the battery voltage of the secondary battery E2 is necessary for stopping the control operation of the constant current circuit 20 when the battery voltage reaches the full charge voltage, and is omitted. It is not done.
- the optimum operation control can be realized.
- FIG. 10 shows a circuit configuration diagram of the charging system of the fourth embodiment
- FIG. 11 shows a charging characteristic diagram of the charging system.
- the configuration for generating the operation timing of the voltage regulator 30 is changed from the charging system of the first embodiment.
- the current value is monitored at the time of constant current charge without the step-up operation, and the operation of the voltage regulator 30 is started based on the current value decreasing by the reference amount. It is
- the detection voltage of the charging current is input to switching control circuit 52, and the current value of constant current charging is monitored by switching control circuit 52, and a certain amount of this current value is determined.
- An operation signal is output from the switching control circuit 52 to the SW control circuit 31 of the voltage regulator 30 based on the decrease of the voltage.
- switching control circuit 52 outputs an operation signal to SW control circuit 31 to start voltage regulator 30, and a constant current accompanied with a step-up operation. Transfer to charging.
- the constant current circuit 20 is stopped and constant voltage charging is performed by the operation of the voltage regulator 30, and the battery is fully charged. It can continue to charge.
- the voltage regulator 30 at the time of constant current charging can be used. Operation control can be performed.
- FIG. 12 shows a configuration diagram of the charging system of the fifth embodiment.
- FIG. 13 is an operating characteristic diagram showing the operation of this charging system.
- the charging system of this embodiment performs charging while the secondary battery E2 is mounted on a system operated by the power supply from the secondary battery E2, and for charging while the secondary battery E2 is charging. It is useful to apply power to the system circuit 100 by supplying power from the power supply device 2 to the system circuit 100 as well, to a system (for example, a cellular phone) enabled.
- the charging current is reduced so that the power supply from the power supply unit 2 to the system circuit 100 does not run short.
- this charging system performs the control operation of the constant current circuit 20 based on the battery voltage of the secondary battery E2, in order to realize the above functions.
- a current switching control circuit 70 is provided to perform switching.
- current switching control circuit 70 sends a control signal of small charging current to constant current control circuit 21. Output.
- the constant current circuit 20 is set to a value (for example, 0.1 to 0.3 C) whose output current is one step lower.
- the current switching control circuit 70 negates the control signal of small charging current. Thereby, the constant current circuit 20 returns the current value to a predetermined value (for example, 1 C).
- constant current circuit 20 When a switching signal with a small current is input, constant current circuit 20 is not controlled so that the output current becomes a small constant current, as shown in FIG. 14, according to the battery voltage.
- the power supply voltage supplied from the power supply unit 2 to the system circuit 100 may be controlled to be constant by changing the magnitude of the output current.
- the charging system of this embodiment when the power supply voltage is used for both the charging of secondary battery E 2 and the driving of the system, the charging power load becomes large. It is possible to avoid the inconvenience that the driving of the vehicle can not be performed.
- FIG. 15 shows a circuit configuration diagram of the charging system of the sixth embodiment.
- the charging system of this embodiment only charges the secondary battery E2 when charging of the secondary battery E2 and driving of the system are both performed by the power supply voltage.
- the power load is biased to prevent an insufficient power supply from the power supply 2 to the system circuit 100 side.
- the charging system includes an input terminal tl for inputting a signal representing an operation mode of the system from the system circuit 100. Then, when the system is in the normal operation mode or the high load operation mode by the signal of the input terminal tl, the output current of the constant current circuit 20 is reduced and the power supply 2 supplies the system circuit 100 side. Control to increase available power.
- FIG. 16 shows a circuit configuration diagram of the charging system of the seventh embodiment.
- the charging system of this embodiment has the same configuration as that of the charging system of the first embodiment, and disconnects fuse 82 when an excessive voltage or an excessive current is input to the power supply terminal. It has a function to block the input from.
- This charging system has a fuse 82 connected to the power supply terminal side of the current path connecting the power supply terminal and the secondary battery E2, and the input voltage and input current of the power supply terminal to monitor the excessive input. And an abnormality detection circuit 80 for outputting a cutting signal for cutting the fuse 82 in the event of a failure.
- the fuse 82 may be a normal fuse that is cut at a rated current or higher, or a resistive fuse that includes a resistance component and is cut at a predetermined power or higher.
- the abnormality detection circuit 80 outputs a disconnection signal to the control circuit 21 of the SW control circuit 31 of the voltage regulator 30 and the control circuit 21 of the constant current circuit 20 when an abnormality is detected.
- the control circuits 21 and 31 turn on the transistor Q1 and the transistor FET1 based on the disconnection signal, and the fuse 82
- the power supply terminals are short-circuited in the current path separated from the secondary battery E2, and the fuse 82 is cut.
- FIG. 17 shows a modification of the configuration for cutting the fuse in the circuit configuration of the charging system.
- transistor FET2 for synchronous rectification As shown in FIG. 17, when transistor FET2 for synchronous rectification is employed as the rectifying element of voltage regulator 30, when transistor FET1 is turned on to cut fuse 82, the secondary battery is turned on. It is conceivable that discharge is performed from E2 through this transistor FET1. Therefore, in the case where the voltage regulator 30 of the synchronous rectification system is adopted as described above, it is preferable to control the transistor FET2 to be turned off when the disconnection signal is input to interrupt the discharge of the secondary battery E2.
- the abnormality detection circuit 80 does not perform on / off control of the transistors FET1 and FET2 via the SW control circuit 31 of the voltage regulator 30. These transistors FET1 and FET2 may be driven directly to realize the same operation.
- a switch element for cutting the fuse or a current path may be prepared exclusively for that, and the switch element may be turned on / off to cut the fuse 82.
- the switch element may be turned on / off to cut the fuse 82.
- FIG. 18 shows a circuit configuration example of the charging system of the eighth embodiment.
- the charging system of this embodiment uses the charging circuit when the power supply terminal is open.
- Power can be supplied from the secondary battery E2 to the system circuit 100.
- the voltage regulator 30 of the synchronous rectification system using the transistor FET 2 as the rectifying element of the voltage regulator 30 is adopted.
- the voltage output to the system circuit 100 can be adjusted by operating the voltage regulator 30 as a step-down switching regulator with a reverse output.
- FIGS. 19 and 20 show modifications of the charging system that can supply power from the secondary battery E2 to the system circuit via the charging circuit.
- Various configurations can be applied as a configuration for supplying current from secondary battery E 2 to system circuit 100 while bypassing constant current circuit 20.
- a field effect transistor FET 3 having a body diode whose input side is force-sworded as a current control transistor of the constant current circuit 20, the same operation as that of FIG. You can get it. That is, current can flow to the system circuit side through the body diode of the transistor FET3.
- a field effect transistor FET 4 is connected in parallel with the current control transistor Q 1 and the voltage regulator L 1, and the discharge control circuit 90 turns on the transistor FET 4. It may be configured to be able to perform off control. Then, in the discharge mode, the discharge control circuit 90 can drive the transistor FET 4 ON to supply current from the secondary battery E 2 to the system circuit 100.
- discharging the secondary battery E2 from the secondary battery E2 to the system circuit 100 is also possible by connecting the system circuit 100 in parallel to the power supply terminal.
- the present invention has been described based on the embodiments.
- the present invention is not limited to the above-described embodiments.
- a lithium ion battery is illustrated as a secondary battery
- Other secondary batteries may be applied as long as they have similar charging characteristics.
- the circuit configuration and the operation contents specifically shown in the embodiment can be appropriately changed without departing from the scope of the invention.
- the present invention is applicable to, for example, a secondary battery charging circuit that charges a secondary battery such as a lithium ion battery.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/308,283 US20100188051A1 (en) | 2006-06-14 | 2007-06-13 | Secondary battery charging circuit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006164458A JP2007336664A (ja) | 2006-06-14 | 2006-06-14 | 2次電池充電回路 |
JP2006-164458 | 2006-06-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007145240A1 true WO2007145240A1 (ja) | 2007-12-21 |
Family
ID=38831754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/061880 WO2007145240A1 (ja) | 2006-06-14 | 2007-06-13 | 2次電池充電回路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100188051A1 (ja) |
JP (1) | JP2007336664A (ja) |
CN (1) | CN101467329A (ja) |
WO (1) | WO2007145240A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015082882A (ja) * | 2013-10-22 | 2015-04-27 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
JP2015222228A (ja) * | 2014-05-23 | 2015-12-10 | 株式会社ノーリツ | 制御装置 |
CN105375600A (zh) * | 2015-10-28 | 2016-03-02 | 邹小辉 | 一种锂电池充电电路 |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101557118B (zh) * | 2008-04-09 | 2012-05-30 | 鹏智科技(深圳)有限公司 | 二次电池的充电控制电路 |
CN101557119B (zh) * | 2008-04-09 | 2012-11-21 | 鹏智科技(深圳)有限公司 | 二次电池的充电控制电路 |
US8421416B2 (en) * | 2008-04-16 | 2013-04-16 | Texas Instruments Incorporated | Battery charge compensation |
JP2010200580A (ja) * | 2009-02-27 | 2010-09-09 | Nec Tokin Corp | 二次電池電源装置 |
US9614389B2 (en) * | 2009-04-14 | 2017-04-04 | Ford Global Technologies, Llc | Method and system for controlling current flow through a power distribution circuit |
US8030884B2 (en) * | 2009-08-31 | 2011-10-04 | General Electric Company | Apparatus for transferring energy using onboard power electronics and method of manufacturing same |
US9132741B2 (en) * | 2009-10-08 | 2015-09-15 | Ford Global Technologies, Llc | Method and system for controlling current flow through a power distribution circuit |
US8855951B2 (en) * | 2010-04-13 | 2014-10-07 | Ford Global Technologies, Llc | Power distribution circuit diagnostic system and method |
JP5618359B2 (ja) * | 2010-08-02 | 2014-11-05 | Necエナジーデバイス株式会社 | 二次電池パック接続制御方法、および、蓄電システム |
CN102545276A (zh) * | 2010-12-08 | 2012-07-04 | 深圳富泰宏精密工业有限公司 | 充电电路 |
JP2012175736A (ja) * | 2011-02-17 | 2012-09-10 | Ricoh Co Ltd | 携帯機器、画像記録装置 |
JP5801605B2 (ja) * | 2011-05-16 | 2015-10-28 | ラピスセミコンダクタ株式会社 | 比較回路、半導体装置、電池監視システム、充電禁止方法、及び充電禁止プログラム |
JP5880105B2 (ja) * | 2012-02-14 | 2016-03-08 | ミツミ電機株式会社 | 充電回路 |
JP5958067B2 (ja) * | 2012-05-11 | 2016-07-27 | ソニー株式会社 | 電源装置、電源制御方法および電動車両 |
US9048679B2 (en) | 2012-06-28 | 2015-06-02 | Blackberry Limited | Maximized battery capacity charge based on equilibrium charging |
JP5720660B2 (ja) * | 2012-11-29 | 2015-05-20 | コニカミノルタ株式会社 | 画像形成装置および二次電池の充電方法 |
JP2014204541A (ja) * | 2013-04-03 | 2014-10-27 | 株式会社オートネットワーク技術研究所 | 制御装置 |
EP2983270A4 (en) * | 2013-04-03 | 2016-07-27 | Autonetworks Technologies Ltd | CONTROL DEVICE, POWER SUPPLY CONTROL DEVICE, CHARGE CONTROL METHOD, CHARGE CONTROL DEVICE, AND POWER SUPPLY DEVICE FOR VEHICLE |
TWI497796B (zh) * | 2013-07-29 | 2015-08-21 | Leadtrend Tech Corp | 對一可充電式電池的充電方法 |
KR102063209B1 (ko) * | 2013-09-16 | 2020-01-07 | 엘지전자 주식회사 | 이동 단말기와 그의 배터리 충전방법 |
CN105515073B (zh) * | 2014-09-24 | 2018-07-27 | 华邦电子股份有限公司 | 充电结构 |
JP2016184510A (ja) * | 2015-03-26 | 2016-10-20 | Necプラットフォームズ株式会社 | 蓄電装置、充放電方法および蓄電装置制御プログラム |
CN104993564B (zh) * | 2015-07-10 | 2018-02-13 | 常州东村电子有限公司 | 新能源超级电容充电电路 |
CN105140995A (zh) * | 2015-09-02 | 2015-12-09 | 刘云腾 | 一种安全可靠移动电源 |
CN204915554U (zh) * | 2015-09-18 | 2015-12-30 | 泰科电子(上海)有限公司 | 感应电路、混合驱动电路及感应器组件 |
US10372542B2 (en) * | 2015-09-28 | 2019-08-06 | Ca, Inc. | Fault tolerant event management system |
CN205123326U (zh) * | 2015-10-27 | 2016-03-30 | 无锡中感微电子股份有限公司 | 快速充电电路 |
CN105515101A (zh) * | 2015-12-11 | 2016-04-20 | 上海中兴派能能源科技有限公司 | 锂电池组用双向电源 |
KR102458732B1 (ko) * | 2016-06-09 | 2022-10-24 | 폴라륨 에너지 솔루션스 에이비 | 배터리 모듈 및 그 작동 방법 |
CN107947252B (zh) | 2016-10-12 | 2020-09-22 | Oppo广东移动通信有限公司 | 终端和设备 |
WO2018068243A1 (zh) * | 2016-10-12 | 2018-04-19 | 广东欧珀移动通信有限公司 | 移动终端 |
US10992144B2 (en) * | 2017-05-17 | 2021-04-27 | Galley Power LLC | Battery balancing and current control with bypass circuit for load switch |
CN109980703A (zh) * | 2017-12-27 | 2019-07-05 | 立锜科技股份有限公司 | 充电控制方法与充电装置及其中的充电电路 |
JP6756754B2 (ja) * | 2018-02-09 | 2020-09-16 | ミツミ電機株式会社 | 充電制御装置、充電システム及び充電制御方法 |
DE102018105273A1 (de) * | 2018-03-07 | 2019-09-12 | Minebea Mitsumi Inc. | Elektronische Ultra-Low-Leakage Schaltung zur Schnellladung |
CN111884277B (zh) * | 2020-04-20 | 2022-05-17 | 珠海市杰理科技股份有限公司 | 充电控制方法及装置、控制芯片、移动充电装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001327086A (ja) * | 2000-05-18 | 2001-11-22 | Sony Corp | 充電回路 |
JP3104747U (ja) * | 2004-04-08 | 2004-10-14 | ファイラックインターナショナル株式会社 | 太陽電池式充電装置 |
JP2004320914A (ja) * | 2003-04-17 | 2004-11-11 | Fuji Photo Film Co Ltd | 充電制御装置及び充電制御方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE516507C2 (sv) * | 1996-12-23 | 2002-01-22 | Ericsson Telefon Ab L M | Uppladdningsbart batteri med inbyggd säkerhetskrets för en portabel elektrisk apparat |
JP3926699B2 (ja) * | 2002-07-30 | 2007-06-06 | 株式会社リコー | 二次電池の充電装置及びその充電方法 |
US20040164711A1 (en) * | 2003-02-25 | 2004-08-26 | Isao Hayashi | Battery charger and method therefor |
US7266000B2 (en) * | 2004-09-09 | 2007-09-04 | Rockwell Automation Technologies, Incl | Controlled inrush current limiter |
-
2006
- 2006-06-14 JP JP2006164458A patent/JP2007336664A/ja not_active Withdrawn
-
2007
- 2007-06-13 US US12/308,283 patent/US20100188051A1/en not_active Abandoned
- 2007-06-13 CN CNA2007800219943A patent/CN101467329A/zh active Pending
- 2007-06-13 WO PCT/JP2007/061880 patent/WO2007145240A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001327086A (ja) * | 2000-05-18 | 2001-11-22 | Sony Corp | 充電回路 |
JP2004320914A (ja) * | 2003-04-17 | 2004-11-11 | Fuji Photo Film Co Ltd | 充電制御装置及び充電制御方法 |
JP3104747U (ja) * | 2004-04-08 | 2004-10-14 | ファイラックインターナショナル株式会社 | 太陽電池式充電装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015082882A (ja) * | 2013-10-22 | 2015-04-27 | 東芝三菱電機産業システム株式会社 | 電力変換装置 |
JP2015222228A (ja) * | 2014-05-23 | 2015-12-10 | 株式会社ノーリツ | 制御装置 |
CN105375600A (zh) * | 2015-10-28 | 2016-03-02 | 邹小辉 | 一种锂电池充电电路 |
Also Published As
Publication number | Publication date |
---|---|
JP2007336664A (ja) | 2007-12-27 |
US20100188051A1 (en) | 2010-07-29 |
CN101467329A (zh) | 2009-06-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2007145240A1 (ja) | 2次電池充電回路 | |
JP5050415B2 (ja) | 2次電池の充放電回路および電池パック | |
US7659699B2 (en) | Battery | |
US7990108B2 (en) | Charge detector | |
EP2272722B1 (en) | Power source apparatus for vehicle | |
JP5715502B2 (ja) | 充放電制御回路及びバッテリ装置 | |
TWI410019B (zh) | 用於電池管理之方法及設備及充電及放電ㄧ電池系統的方法 | |
US20110001456A1 (en) | Apparatus and method for managing a plurality of secondary batteries | |
US10017138B2 (en) | Power supply management system and power supply management method | |
JP2012191838A (ja) | 電池パック、電動工具、電池パックと電動工具とを接続するアダプタ、及び、電動工具システム | |
JP2011254650A (ja) | 電源装置 | |
TW200533032A (en) | Battery state monitoring circuit and battery device | |
US10199844B2 (en) | Power-supplying device | |
JP2011045230A (ja) | 二次電池 | |
JP2006060883A (ja) | 2バッテリ型車両用電源装置 | |
CN102624371B (zh) | 输出电路、温度开关ic以及电池组 | |
JP4406655B2 (ja) | 電源システム | |
EP3059831A1 (en) | Secondary lithium battery for vehicle use | |
JP2000069689A (ja) | 電池パック装置 | |
CN116937736A (zh) | 电池、充电器及电池的管理电路 | |
US20230099799A1 (en) | Electric power supply system for battery assembly control circuit of electricity storage device, and electricity storage device | |
US20040251877A1 (en) | Voltage adapter circuit for a lithium ion rechargeable battery | |
KR20150050125A (ko) | 전동카트의 배터리 방전 방지장치 및 방법 | |
TW200415836A (en) | Battery state monitoring circuit and battery device | |
KR100459423B1 (ko) | 이동통신단말기의 배터리 보호회로 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200780021994.3 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07767106 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12308283 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 07767106 Country of ref document: EP Kind code of ref document: A1 |