JP3239273U - storage system - Google Patents

Abstract

A power storage system capable of efficiently charging a storage battery according to the type of power source is provided. Kind Code: A1 A power storage system (1) including a plurality of conversion units (9) and a storage battery (5). In the case of the power supply 2A, the first conversion section 9A converts AC to DC, in the case of the DC high voltage power supply 2B, the second conversion section 9B steps down the DC as it is, and in the case of the DC low voltage power supply 2C, the third conversion section. 9C converts it into a stepped-up direct current, and the storage battery 5 is charged with the electricity converted by this converter 9 . [Selection drawing] Fig. 2

Description

TECHNICAL FIELD The present invention relates to an electric storage system that charges a storage battery with electricity supplied from a power supply, and more particularly to an electric storage system that can efficiently charge a storage battery according to the type of power supply.

Various power storage systems for charging storage batteries have been proposed (see Patent Document 1, for example). The power storage system described in Patent Literature 1 has a configuration in which a storage battery is charged with electricity supplied from a solar battery. Since the power storage system is configured with circuits that are specialized for charging from solar cells, it was not possible to support charging from a different type of power source. In the first place, the conventional power storage system did not assume charging with a different type of power supply.

Japanese Patent Application Laid-Open No. 2014-100050

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a power storage system capable of efficiently charging a storage battery according to the type of power source.

An electric storage system for achieving the above object comprises an input section connected to a power source, a storage battery connected to the input section and charged with electricity supplied from the power source, and the input section and the storage battery. A power storage system comprising a control mechanism for controlling electricity supplied to the storage battery connected between the power storage system, a type determination unit for determining the type of the power supply connected to the input unit, and the type determination unit The control mechanism includes a plurality of conversion units that convert at least one of voltage or current of electricity supplied from the power source based on the determination result and perform different processing according to the type of the power source. , as the plurality of conversion units, a first conversion unit for converting the electricity supplied from the AC power supply from AC to DC when the power supply is an AC power supply that generates AC electricity; a second conversion unit for stepping down the direct current electricity supplied from the direct current high voltage power supply when the direct current high voltage power supply generates electricity with a voltage equal to or higher than the predetermined value; and a third converter for converting the electricity supplied from the DC low-voltage power supply into a stepped-up DC when the power supply is a DC low-voltage power supply for generating electricity.

According to the present invention, the type of power supply can be determined, which is advantageous in efficiently charging the storage battery according to the type of power supply.

1 is an explanatory diagram illustrating an outline of a configuration of a power storage system; FIG. FIG. 2 is an explanatory diagram illustrating a modification of the power storage system of FIG. 1; FIG. 2 is an explanatory diagram illustrating a modification of the power storage system of FIG. 1; FIG. 2 is an explanatory diagram illustrating a modification of the power storage system of FIG. 1;

Hereinafter, an electric storage system will be described based on an embodiment shown in the drawings.

As illustrated in FIG. 1, the power storage system 1 includes an input section 3 connected to a power source 2, a control mechanism 4 connected to the input section 3, a storage battery 5 connected to the control mechanism 4, and a storage battery 5 connected to the control mechanism 4. and an output 6 connected to 5 . The output unit 6 is connected to an external device 7 that receives electricity from the storage battery 5 . The above configurations are connected to each other by electric wires or the like. In FIG. 1, arrows indicate directions in which electricity flows for explanation.

In this embodiment, the control mechanism 4 has a type determination section 8 connected to the input section 3 and a conversion section 9 connected between the type determination section 8 and the storage battery 5 . The type determination unit 8 has a configuration for determining the type of the power source 2 connected to the input unit 3 . The type determination unit 8 has a configuration for determining whether the power source 2 is an AC power source or a DC power source. Further, the type determination unit 8 has a configuration for determining the type of the power source 2 from the voltage value and current value of the electricity supplied from the power source 2 .

The conversion unit 9 has a configuration for converting the electricity supplied from the power source 2 by an appropriate method based on the determination result of the type determination unit 8 and charging the storage battery 5 . Specifically, for example, if the electricity supplied from the power supply 2 is alternating current, the conversion unit 9 has a configuration that converts alternating current into direct current, and if it is direct current, converts it into a voltage suitable for charging. .

The storage battery 5 can be composed of, for example, a lithium ion battery. The storage battery 5 is not limited to a lithium ion battery as long as it has a structure capable of storing electricity. For example, the storage battery 5 may be composed of a lead-acid battery, an electric double layer, or the like.

The output unit 6 can be configured to include a DC/AC converter that converts direct-current electricity output from the storage battery 5 into alternating current. At this time, the output unit 6 has a configuration for supplying AC electricity of 100 V to the external device 7, for example. In addition, the output unit 6 may have a configuration in which the DC electricity output from the storage battery 5 is supplied to the external device 7 as it is. When the rated output of the storage battery 5 is 12 V, electricity of 11 V to 14 V, for example, is supplied to the external device 7 via the output section 6 . When the rated output of the storage battery 5 is 24 V, electricity of 22 V to 28 V, for example, is supplied to the external device 7 via the output section 6 . The output unit 6 may have a configuration for supplying at least one of AC or DC electricity to the external device 7 .

When the power source 2 is connected to the power storage system 1 , the type of the power source 2 is determined by the type determination unit 8 . Based on the determination result of the type determination unit 8, the conversion unit 9 converts at least one of the voltage value and the current value to charge the storage battery 5. FIG.

As illustrated in FIG. 2, the types of the power supply 2 are assumed to be, for example, an AC power supply 2A, a DC high voltage power supply 2B, and a DC low voltage power supply 2C. The AC power supply 2A corresponds to, for example, a commercial power supply or a generator that outputs 100V or 200V AC electricity. The AC power supply 2A may be composed of a generator that outputs AC electricity of 200V or higher. The DC high-voltage power supply 2B corresponds to, for example, a solar panel or a wind power generator that outputs DC electricity of 100V to 400V. The DC low-voltage power supply 2C corresponds to, for example, an alternator for vehicles that outputs DC electricity of 5 to 64 V, a small solar panel, or the like.

The DC high-voltage power supply 2B and the DC low-voltage power supply 2C can be distinguished from each other by using the voltage at which the storage battery 5 can be charged as a boundary. For example, if the storage battery 5 is composed of a lithium ion battery with a rated output of 12V, the chargeable voltage is about 15V, which is higher than the rated output. When the storage battery 5 is composed of a lithium ion battery with a rated output of 24V, the chargeable voltage is about 30V. When the storage battery 5 is composed of a lead-acid battery with a rated output of 12V, the chargeable voltage is about 14.5V. A power supply that generates electricity at a voltage higher than the chargeable voltage can be distinguished as a DC high voltage power supply 2B, and a power supply that generates electricity at a voltage lower than the chargeable voltage can be distinguished as a DC low voltage power supply 2C.

The value of the voltage at the boundary between DC high-voltage power supply 2B and DC low-voltage power supply 2C is not limited to the above. It can be appropriately determined according to the chargeable voltage of the storage battery 5 . Alternatively, a value higher than the chargeable voltage, such as 90 V, may be set in advance, and the DC high-voltage power supply 2B and the DC low-voltage power supply 2C may be distinguished by using this value as a boundary. Depending on the storage battery 5 installed in the power storage system 1, the value of the voltage at the boundary between the DC high-voltage power supply 2B and the DC low-voltage power supply 2C is set in advance.

The input unit 3 has a connection port for connecting each power supply 2, respectively. Each connection port is connected to the type determination unit 8 via each route formed independently. The type determination unit 8 can determine from which power source 2 electricity is supplied. The input unit 3 or the type determination unit 8 may be provided with a detection sensor 10 that detects which connection port the power supply is connected to or through which connection port electricity is supplied. The connection port for the AC power supply can be composed of, for example, an AC inlet to which a cable extending from the AC power supply is connected, or a terminal block. The connection port for the DC power supply can be composed of, for example, a DC power connector or a terminal block to which a cable extending from the DC power supply is connected. The type determining unit 8 may determine whether the power source 2 is an AC power source 2A, a DC high voltage power source 2B, or a DC low voltage power source 2C based on a signal from a detection sensor 10 installed in the input unit 3. At this time, the detection sensor 10 and the type determination unit 8 may be connected by the signal line L1. In FIG. 2, the signal line L1 is indicated by a one-dot chain line for explanation. The signal line L1 may be wired or wireless.

As illustrated in FIG. 2, a DC/AC converter 11 for converting electricity supplied from a DC low-voltage power supply 2C into AC may be connected between the input section 3 and the type determining section 8. FIG. This DC/AC converter 11 sends alternating current electricity of 100 V, for example, to the type determining section 8 .

As exemplified in FIG. 2, the converter 9 is composed of a plurality of converters corresponding to the types of the power source 2 respectively. A first conversion unit 9A that converts the electricity supplied from the AC power supply 2A from AC to DC, a second conversion unit 9B that steps down the electricity supplied from the DC high voltage power supply 2B as it is, and a DC low voltage power supply 2C. The conversion unit 9 includes a third conversion unit 9C that converts the generated electricity into a boosted direct current.

The first conversion section 9A can be composed of an AC/DC converter. The first conversion unit 9A converts the AC supplied from the AC power supply 2A to a voltage in a range that is equal to or higher than the chargeable voltage of the storage battery 5 and is equal to or lower than the upper limit of the voltage that can safely charge the storage battery 5 (hereinafter referred to as the appropriate charging voltage ) and supplies it to the storage battery 5 .

The second conversion section 9B can be composed of a DC/DC converter. The second converter 9</b>B steps down the direct current, which has a voltage higher than the voltage that can safely charge the storage battery 5 , to an appropriate charging voltage as it is, and supplies it to the storage battery 5 .

The third conversion section 9C can be composed of an AC/DC converter. The third converter 9C converts the electricity supplied from the DC low-voltage power supply 2C and converted into AC by the DC/AC converter 11 into DC of appropriate charging voltage and supplies it to the storage battery 5 . When the DC/AC converter 11 is not connected, the third converter 9C is composed of a DC/AC converter and an AC/DC converter. The third converter 9C converts the direct current supplied from the low-voltage DC power supply 2C into alternating current, and then converts it back into direct current to boost it to an appropriate charging voltage. The third conversion section 9 may be configured by a DC/DC converter that boosts the direct current supplied from the low voltage DC power supply 2C as it is.

When the DC/AC converter 11 is provided, the current value can be reduced by converting relatively low voltage electricity such as 13V into 100V alternating current. Along with this, the thickness of the electric wires and the like that constitute the power storage system 1 can be significantly reduced. This is advantageous for downsizing the power storage system 1 .

The power storage system 1 includes a type determination unit 8 that determines the type of the power source 2 and a plurality of conversion units 9 that perform different processes depending on the type of the power source 2 . Since the corresponding conversion unit 9 converts the voltage or the like according to the determination result of the type determination unit 8, it is advantageous for charging the storage battery 5 efficiently.

In the case of a power supply 2 that supplies a relatively large amount of power, such as an AC power supply 2A or a DC high-voltage power supply 2B, the storage battery 5 can be efficiently charged in a relatively short time. In the case of a power source 2 with a relatively low voltage, such as a DC low-voltage power source 2C, the storage battery 5 can be charged by increasing the voltage. Even if the storage battery 5 is composed of a lithium-ion battery with a relatively high appropriate charging voltage, the voltage can be boosted by the third conversion unit 9C and charged, so that the storage battery 5 can be charged up to 100% of its capacity. Charging becomes possible. Therefore, the storage battery 5 can be charged up to 100% of its capacity even when the DC low-voltage power supply 2C is composed of, for example, an alternator for a vehicle and the vehicle is running.

As illustrated in FIG. 3 , the control mechanism 4 may be configured to include a charge control section 12 connected between the type determination section 8 and the conversion section 9 . The charge control unit 12 is not an essential requirement of the power storage system 1 . The charging control unit 12 may have a configuration that controls charging of the storage battery 5 based on the determination result of the type determination unit 8 .

For example, the charging control unit 12 determines whether or not the electricity supplied from the power source 2 satisfies the chargeable condition, charges the storage battery 5 when the condition is satisfied, and charges the storage battery 5 when the condition is not satisfied. It can be configured to perform control to stop charging to the storage battery 5 . At this time, chargeable conditions are set in advance for each power source 2 . Charging control unit 12 and type determination unit 8 may be connected by signal line L2. In FIG. 2, the signal line L2 is indicated by a dashed line for explanation.

The charging condition of the AC power supply 2A is set such that the voltage is AC 85V or more and 265V or less, for example. A chargeable condition of the DC high-voltage power supply 2B is set such that the voltage is, for example, DC 120V or more and 350V or less. The chargeable condition of the DC low-voltage power supply 2C is set within a range that satisfies the amount of electric power that can be charged to the storage battery 5 . Chargeable conditions for each power supply 2 can be stored in the charging control unit 12, for example. The chargeable condition may be stored in the memory of the control mechanism 4 or the like.

The charging control unit 12 has a configuration for monitoring the voltage and current of the electricity supplied from the power source 2, and based on this voltage and the determination result of the type determination unit 8, the charge control unit 12 satisfies a preset charging condition. Determine whether or not With this configuration, when the DC low-voltage power supply 2C is composed of a device such as an alternator that generates a relatively small amount of power and the amount of power generation is not sufficient, the charge control unit 12 can stop charging assuming that the chargeable condition is not satisfied. This is advantageous in avoiding problems such as failures due to excessive output of the alternator or the like.

The charge control unit 12 can be configured to control the amount of electricity to be sent to the conversion unit 9 based on, for example, an appropriate charge amount predetermined for each type of the power source 2 and the determination result of the type determination unit 8 . The proper amount of charge is defined for each type of power source 2, for example, in the range of electric energy. The charging control unit 12 controls the charging amount of the storage battery 5 within the range of this amount of electric power. The appropriate charging amount can be stored in the memory of the control mechanism 4 or the charging control section 12, for example. With this configuration of the charge control unit 12 , the storage battery 5 can be charged with an appropriate amount of charge according to the type of the power supply 2 . Specifically, when the power supplied from the power supply 2 is relatively small, the charging control unit 12 performs control to suppress the charging amount of the storage battery 5 . When the power supplied from the power supply 2 is relatively large, the charge control unit 12 performs control to increase the charge amount of the storage battery 5 .

For example, when electricity is supplied from a DC low-voltage power supply 2C configured by a 300 W alternator or the like that generates a relatively small amount of power, the charging control unit 12 sends electricity to the third conversion unit 9C within a range in which the charge amount is 300 W or less. . On the other hand, when electricity is supplied from an AC power supply 2A configured by a commercial power supply with an electric energy of 1500 W or a generator with a power of 3000 W, the charging control unit 12 sets the charging amount to about 500 W to 1500 W and sets the first conversion unit 9A. send electricity to

If the power supply 2 is a DC low-voltage power supply 2C that generates a small amount of power, the charging amount can be suppressed, which is advantageous for avoiding the problem of excessive output of the DC low-voltage power supply 2C. It is possible to avoid the trouble that the alternator or the like that constitutes the DC low-voltage power supply 2C becomes overpowered and breaks down. When the power supply 2 is composed of an AC power supply 2A that supplies a large amount of power, the amount of charge can be increased, so the power storage system 1 can efficiently charge the storage battery 5 in a relatively short time.

The charging control unit 12 may be configured to stop charging the storage battery 5 when electricity cannot be supplied to the storage battery 5 within the range defined by the appropriate charging amount. Moreover, when charging of the storage battery 5 is completed, the charging control unit 12 may have a configuration to stop charging. That is, the charging control unit 12 can have a configuration for controlling charging according to the electricity supplied from the power supply 2 or a configuration for controlling charging according to the remaining amount of the storage battery 5 .

As illustrated in FIG. 3 , the power storage system 1 may be configured to include a state acquisition unit 13 connected between the type determination unit 8 and the charging control unit 12 . The state acquisition unit 13 is not an essential requirement of the power storage system 1 . In FIG. 3, the state acquisition unit 13 is indicated by a dashed line for explanation. When the state acquisition unit 13 is incorporated in the power storage system 1, the charge control unit 12 is also incorporated. The state acquisition unit 13 is configured to acquire the state of the power supply 2 . Also, the state acquisition unit 13 is connected to the charging control unit 12 via a signal line L3.

The state of the power supply 2 acquired by the state acquisition unit 13 means information including the state of operation or stop of the power supply 2 configured by a generator, an alternator, etc., the amount of electric power supplied by the power supply 2, and the like. The state acquisition unit 13 may have a configuration for estimating the state of the power source 2 from the voltage value and current value of electricity supplied from the power source 2 . Alternatively, the state acquisition unit 13 and the power source 2 may be connected by a signal line L4 so that the state acquisition unit 13 acquires the state directly from the power source 2 .

When the DC low-voltage power supply 2C is configured by a vehicle alternator, the alternator and the state acquisition unit 13 may be connected by a signal line L4 to directly acquire the power generation state of the alternator. Alternatively, the control computer of the vehicle and the state obtaining unit 13 may be connected by a signal line to obtain the state of the alternator from the control computer. The state acquisition unit 13 acquires information such as the power generation amount and rotation speed of the alternator as the state of the power supply 2 .

When the vehicle engine is idling, the alternator generates relatively little power. When the state acquisition unit 13 acquires the state of the power source 2 , the charging control unit 12 controls the charging amount or stops charging based on the information acquired by the state acquisition unit 13 . This is advantageous in suppressing the problem that the amount of charge in the storage battery 5 exceeds the amount of power generated by the alternator, causing the alternator to output excessively. This is advantageous for avoiding the problem of the alternator failing due to excessive output.

The configuration may be such that the state acquisition unit 13 acquires the on/off state of the accessory power supply (ACC power supply) of the vehicle. When the ACC power supply is off, the charging control unit 12 can be configured to stop charging based on this signal. When the vehicle is stopped, it is possible to prevent electricity from flowing from the lead battery mounted on the vehicle and connected to the alternator to the storage battery 5 of the power storage system 1 . This is advantageous in avoiding the problem that the vehicle cannot be started due to the lead battery remaining too low.

When the AC power supply 2A is composed of a generator, the generator and the state acquisition unit 13 may be connected by a signal line L4 to directly acquire the power generation state of the generator. The state acquisition unit 13 acquires information such as the state of starting or stopping of the generator and the amount of power generation as the state of the power supply 2 . If the power generation amount is large, the charge amount is increased, and if the power generation amount is low or the generator is stopped, the charge amount is decreased or charging is stopped based on the information of the state acquisition unit 13. The control unit 12 performs this.

Since the power storage system 1 includes a plurality of conversion units 9A to 9C corresponding to the respective power sources 2, even in a state where a plurality of power sources 2 are connected and electricity is supplied at the same time, the storage battery 5 can be charged. becomes possible. For example, as illustrated in FIG. 4, a generator can be connected as the AC power supply 2A, and a solar battery can be connected as the DC high voltage power supply 2B. Electricity supplied from the power source 2 is sent to the storage battery 5 via each conversion unit 9 corresponding to the charging control unit 12 of the control mechanism 4 . In FIG. 4, the type determination unit 8 and the like provided in the control mechanism 4 are omitted for explanation.

At this time, the control mechanism 4 may have a configuration in which, for example, electricity supplied from two or more power sources 2 is combined and sent to the storage battery 5 . For example, when electricity is supplied simultaneously from the AC power supply 2A and the DC high-voltage power supply 2B, the respective electricity can be converted into appropriate charging voltages, combined, and sent to the storage battery 5 . For example, when electricity is supplied simultaneously from the AC power supply 2A and the DC low-voltage power supply 2C, it is possible to match the phases and synthesize the electricity, convert it to DC, and send it to the storage battery 5 . Further, the control mechanism 4 has a configuration in which, when electricity is supplied from two or more power sources 2, the storage battery 5 is preferentially charged only with electricity supplied from some of the plurality of power sources 2. may

The control mechanism 4 may include a monitoring unit 14 that monitors the remaining amount of the storage battery 5 . The monitoring unit 14 has a configuration for estimating the remaining amount from the voltage of the storage battery 5 . The configuration of the monitoring unit 14 is not limited to this, as long as it can acquire the remaining amount of the storage battery 5 . For example, the remaining amount of the storage battery 5 may be estimated from the difference between the power input from the conversion unit 9 to the storage battery 5 and the power output from the storage battery 5 to the external device 7 .

In the embodiment illustrated in FIG. 4, the state acquisition unit 13 of the control mechanism 4 is configured to send a control signal for controlling the starting and stopping of the generator to the AC power supply 2A via the signal line L4.

The control mechanism 4 determines whether or not the amount of charge in the storage battery 5 is sufficient from the amount of change in the remaining amount. When the remaining amount of the storage battery 5 is greater than or equal to a predetermined amount, or when the remaining amount tends to increase, a control signal from the state acquisition unit 13 can be used to stop the generator. Also, when the remaining amount of the storage battery 5 is less than a predetermined amount or when the remaining amount tends to decrease, the state acquisition unit 13 can start the generator. At this time, the storage battery 5 is charged by the AC power supply 2A in parallel with the charging of the storage battery 5 by the DC high voltage power supply 2B.

When charging the storage battery 5, priority is given to charging from the solar battery, and the power storage system 1 can control the start and stop of the generator according to the situation. It can be charged. Since the power storage system 1 can control the generator, the capacity of the storage battery 5 can be automatically kept constant.

Electricity supplied from the power supply 2 may bypass the storage battery 5 and be directly supplied from the output unit 6 to the external device 7 . A configuration having a bypass cable 15 that directly connects the control mechanism 4 and the output section 6 as illustrated in FIG. 4 is possible. In this embodiment, the output section 6 has a DC/AC converter 16 as well as a relay 17 composed of a solid state relay or a mechanical relay. By configuring the relay 17 with a solid state relay, the electricity supplied from the AC power supply 2A through the bypass cable 15 and the electricity supplied from the storage battery 5 can be switched without interruption and supplied to the external device 7. can be done. This relay 17 can also supply the electricity supplied via the bypass cable 15 and the electricity supplied from the storage battery 5 to the external device 7 at the same time.

The charging control unit 12 of the control mechanism 4 supplies the necessary power to the external device 7 via the bypass cable 15 and the output unit 6, and supplies the storage battery 5 with the surplus power not used by the external device 7 via the conversion unit 9. may be configured to send For example, electricity supplied from a solar battery can be preferentially supplied to the external device 7 . When the power required by the external device 7 is large, the insufficient power can be supplied from the storage battery 5, and when the required power is small, the storage battery 5 can be charged with the surplus power.

The signal lines L1 to L4 described in this specification may be wired or wireless. Although the power storage system 1 connectable to the power supply 2 composed of the AC power supply 2A, the DC high voltage power supply 2B, and the DC low voltage power supply 2C has been described as an example, the present invention is not limited to this. The power storage system 1 may have a configuration connectable to at least two power sources 2 out of the AC power source 2A, the DC high voltage power source 2B, and the DC low voltage power source 2C.

1 power storage system 2 power supply 2A AC power supply 2B DC high voltage power supply 2C DC low voltage power supply 3 Input unit 4 Control mechanism 5 Storage battery 6 Output unit 7 External device 8 Type determination unit 9 Conversion unit 9A First conversion unit 9B Second conversion unit 9C Third Conversion unit 10 Detection sensor 11 DC/AC converter 12 Charging control unit 13 State acquisition unit 14 Monitoring unit 15 Bypass cable 16 DC/AC converter 17 Relays L1 to L4 Signal line

Claims (5)

an input unit connected to a power supply, a storage battery connected to the input unit and charged with electricity supplied from the power supply, and electricity connected between the input unit and the storage battery and supplied to the storage battery In a power storage system comprising a control mechanism that controls
a type determination unit that determines the type of the power source connected to the input unit; and a conversion unit that converts at least one of voltage and current of electricity supplied from the power source based on the determination result of the type determination unit. the control mechanism includes a plurality of conversion units that perform different processing according to the type of the power source,
As the plurality of conversion units,
a first conversion unit for converting the electricity supplied from the AC power supply from AC to DC when the power supply is an AC power supply that generates AC electricity;
a second conversion unit for stepping down the direct-current electricity supplied from the direct-current high-voltage power source when the power source is a direct-current high-voltage power source that generates electricity with a voltage equal to or higher than a predetermined value;
and a third conversion unit for converting the electricity supplied from the DC low-voltage power supply into a boosted DC when the power supply is a DC power supply and is a DC low-voltage power supply that generates electricity with a voltage lower than the predetermined value. storage system. The control mechanism has a charge control unit that controls charging of the storage battery based on the determination result of the type determination unit,
The charging control unit determines whether or not the electricity supplied from the power source satisfies a chargeable condition predetermined for each type of the power source, and controls charging of the storage battery based on the determination result. is equipped with
2 . The power storage system according to claim 1 , wherein when the power supply is the DC low-voltage power supply, the charge control unit has a configuration for setting the charging amount to a range equal to or lower than the output of the DC low-voltage power supply. The control mechanism has a state acquisition unit that is arranged between the type determination unit and the charging control unit and acquires the state of the power supply,
3. The power storage system according to claim 2, wherein the charging control unit suppresses the charging amount or stops charging based on the information acquired by the state acquisition unit. The AC power supply configured by a generator and the state acquisition unit are connected by a signal line,
4. The power storage system according to claim 3, wherein the signal line is configured to send a control signal for controlling starting and stopping of the generator from the state acquiring unit to the generator. A bypass cable that connects an output unit that outputs electricity from the power storage system to an external device and the control mechanism,
The power storage system according to any one of claims 1 to 4, wherein said output section has a relay connected to said bypass cable, and a DC/AC converter connected between said relay and said storage battery.

Images