JP2016110912A - Power storage system, power management device, and temperature management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform temperature management for electric devices other than a power conditioner. A power storage system 10 includes a storage battery 11, a power conditioner 12, a transmission fan 15, a temperature sensor 13, and a control unit 18. The transmission fan 15 generates an airflow between the storage battery 11 and the power conditioner 12. The temperature sensor 13 detects the temperature of the storage battery 11. The control unit 18 controls the transmission fan 15 to generate an airflow from the power conditioner 12 side to the storage battery 11 side when the temperature of the storage battery 11 is equal to or lower than the first set temperature. [Selection diagram] Figure 1

Description

  The present invention relates to a power storage system that performs appropriate temperature management, a power management apparatus, and a temperature management method.

  A power conditioner is used to convert DC power from a power generator that generates DC power, such as a solar power generator, into AC power. In order to reduce deterioration of electronic components used in the power conditioner, it has been proposed to cool the power conditioner in the housing (see Patent Document 1).

JP 2006-066819 A

  In recent years, it has been studied to commercialize a system in which a power conditioner and other electric devices are accommodated in a single casing. In such a system, temperature management has been demanded for electric devices other than the power conditioner.

  Accordingly, an object of the present invention made in view of such circumstances is to provide a power storage system, a power management apparatus, and a temperature management method capable of performing temperature management on other electrical devices other than the power conditioner. .

In order to solve the problems described above, the power storage system according to the first aspect is
A storage battery,
With the inverter,
A transmission fan for generating an air flow between the storage battery and the power conditioner;
A temperature sensor for detecting the temperature of the storage battery;
A controller that controls the transmission fan to generate an air flow from the power conditioner side to the storage battery side when the temperature of the storage battery detected by the temperature sensor is equal to or lower than a first set temperature. It is a feature.

The power management device according to the ninth aspect is
An acquisition unit for acquiring the temperature of the storage battery;
When the temperature of the storage battery acquired by the acquisition unit is equal to or lower than a first set temperature, an air flow is generated between the storage battery and the power conditioner so that an air flow is generated from the power conditioner side to the storage battery side. And a control unit for controlling the transmission fan to be operated.

  As described above, the solution of the present invention has been described as an apparatus. However, the present invention can be realized as a method, a program, and a storage medium storing the program, which are substantially equivalent thereto, and the scope of the present invention. It should be understood that these are also included.

For example, a temperature management method that realizes the tenth aspect of the present invention as a method,
A detection step for detecting the temperature of the storage battery;
Transmission that generates airflow between the storage battery and the power conditioner so that an airflow is generated from the power conditioner side to the stored value side when the temperature of the storage battery detected in the detection step is equal to or lower than a first set temperature. And a control step for controlling the fan.

  According to the power storage system, the power management apparatus, and the temperature management method according to the present invention configured as described above, temperature management can be performed for other electrical devices other than the power conditioner.

It is a functional block diagram which shows schematic structure of the electrical storage system which concerns on one Embodiment of this invention. It is a partial cutting figure of the housing | casing which accommodates the storage battery and power conditioner of FIG. It is a flowchart for demonstrating the temperature management process which the control part of FIG. 1 performs.

  Hereinafter, embodiments of an imaging apparatus to which the present invention is applied will be described with reference to the drawings.

  FIG. 1 is a functional block diagram schematically showing the configuration of a power storage system according to an embodiment of the present invention. The power storage system 10 includes a storage battery 11, a power conditioner 12, a first temperature sensor 13, a second temperature sensor 14, a transmission fan 15, a ventilation fan 16, an acquisition unit 17, and a control unit 18. In FIG. 1, a broken line is a signal line that transmits information, a signal, and the like, and a solid line indicates a wiring through which a current flows.

  The storage battery 11 is, for example, a lithium ion secondary battery, a nickel / hydrogen storage battery, a nickel / cadmium storage battery, a lead storage battery, or the like, and charges and discharges DC power. For example, as shown in FIG. 2, the storage battery 11 is disposed in the lower stage in the normal posture of the housing 19.

  The power conditioner 12 (see FIG. 1) converts at least DC power into AC power. Further, the power conditioner 12 may convert AC power into DC power. In the present embodiment, the power conditioner 12 converts the AC power supplied from the commercial system through the distribution board into DC power, and charges the storage battery 11. Moreover, in this embodiment, the power conditioner 12 converts the direct-current power charged in the storage battery 11 into alternating current power, and supplies it to load equipment via a distribution board. The power conditioner 12 may convert DC power generated by another power generator such as a solar battery power generator into AC power. The power conditioner 12 is disposed in the upper stage, that is, above the storage battery 11 in the normal posture of the casing 19 (see FIG. 2).

  The first temperature sensor 13 (see FIG. 1) is provided adjacent to the storage battery 11 and detects the temperature of the storage battery 11. The second temperature sensor 14 is provided adjacent to the power conditioner 12 and detects the temperature of the power conditioner 12.

  The transmission fan 15 includes a first fan 20 and a second fan 21 and is installed so as to generate an airflow between the storage battery 11 and the power conditioner 12. For example, as shown in FIG. 2, the first fan 20 and the second fan 21 are provided between the storage battery 11 and the power conditioner 12 in the housing 19.

  One of the first fan 20 and the second fan 21 generates an air flow from the power conditioner 12 side to the storage battery 11 side, and the other generates an air flow from the storage battery 11 side to the power conditioner 12 side. In order to generate such an airflow, for example, the first fan 20 and the second fan 21 have a rotation axis that is spaced apart from each other and parallel. Further, both the first fan 20 and the second fan 21 are configured to rotate in opposite directions when the blades have the same inclination direction with respect to the rotation direction. Or both the 1st fan 20 and the 2nd fan 21 are comprised so that both may rotate to the same direction, when the inclination direction of the blade | wing with respect to the rotation direction is reverse.

  The ventilation fan 16 ventilates the housing 19 that houses the storage battery 11 and the power conditioner 12. For example, the ventilation fan 16 is provided in the outermost shell on the upper side of the housing 19 and is configured to generate an air flow from the inside to the outside or from the outside to the inside. The casing 19 may be provided with a vent in the outer shell opposite to the outer shell where the ventilation fan 16 is provided. In this case, the air flow is prevented from staying in the casing 19 and efficiently. Can be ventilated. In addition, the housing 19 has a sufficient gap between the storage battery 11 and the power conditioner 12 inside, and the ventilation fan 16 drives the ventilation fan 16 regardless of whether the transmission fan 15 is driven or not. The inside of the housing 19 can be ventilated up to the ventilation fan 16.

  For example, in the present embodiment, the acquisition unit 17 and the control unit 18 are provided in the power storage system 10 and control the operation of each device constituting the power storage system 10 so as to exhibit various functions of the power storage system 10. For example, the acquisition unit 17 and the control unit 18 perform temperature management of the power storage location 11 and the power conditioner 12. In the present embodiment, the case where the income unit 21 and the control unit 18 are provided in the power storage system 10 has been described, but may be provided outside the power storage system 10. When the acquisition unit 17 and the control unit 18 are provided outside the power storage system 10, for example, a power management device such as a HEMS (Home Energy Management System) may have the function.

  The acquisition unit 17 acquires the temperatures of the storage battery 11 and the power conditioner 12 detected by the first temperature sensor 13 and the second temperature sensor 14, respectively.

  The control unit 18 is, for example, a dedicated microprocessor or a general-purpose CPU that executes a specific function by reading a specific program. When the temperature of the storage battery 11 is equal to or lower than the first set temperature, the control unit 18 drives the transmission fan 15 so as to generate an airflow from the power conditioner 12 side to the storage battery 11 side. In addition, the control unit 18 drives the transmission fan 15 so as to generate an air flow from the storage battery 11 side to the power conditioner 12 side when the temperature of the storage battery 11 is equal to or higher than a second set temperature higher than the first set temperature. Then, the ventilation fan 16 is driven. For example, the first set temperature is preset to 10 ° C. as the peak temperature of the increase rate of the internal resistance of the storage battery 11. In addition, the second set temperature is set to 40 ° C. in advance as a temperature at which an extreme decrease in the life of the storage battery 11 occurs, for example.

  Moreover, the control part 18 drives the ventilation fan 16 when the temperature of the power conditioner 12 is more than 3rd setting temperature. In addition, when the temperature of the power conditioner 12 is equal to or higher than a fourth set temperature that is higher than the third set temperature, the control unit 18 causes the transmission fan 15 to generate an air flow from the storage battery 11 side to the power conditioner 12 side. The ventilation fan 16 is driven. The third set temperature is preset to 30 ° C. as a temperature at which it is preferable to start cooling for the life of the power conditioner 12, for example. For example, the fourth set temperature is set to 40 ° C. in advance as a temperature at which the life of the power conditioner 12 is extremely reduced.

  Further, the control unit 18 controls the transmission fan 15 based on the temperature of the storage battery 11 when charging / discharging the storage battery 11. The control unit 18 determines whether or not the storage battery 11 is charged / discharged based on, for example, the current value detected by the ammeter in the storage battery 11 or stores the time when charging / discharging preliminarily estimated by statistical data or the like is performed. It is possible to discriminate by acquiring from the above.

  In addition, when the temperature difference between the storage battery 11 and the power conditioner 12 is less than a predetermined temperature difference, the control unit 18 stops driving the transmission fan 15 that generates an air flow from the power conditioner 12 side to the storage battery 11 side. To do.

  Moreover, the control part 18 stops the transmission fan 15 which produces this airflow, when the temperature of the storage battery 11 exceeds 1st setting temperature in the state which is generating the airflow from the power conditioner 12 side to the storage battery 11 side. . Further, the control unit 18 generates an air flow from the storage battery 11 side to the power conditioner 12 side and drives the ventilation fan 16 so that the temperature of the storage battery 11 is lower than the second set temperature and the temperature of the power conditioner 12. When is lower than the third set temperature, the ventilation fan 16 is stopped.

  Next, temperature management processing executed by the control unit 18 in the present embodiment will be described with reference to the flowchart of FIG. The control unit 18 periodically starts the temperature management process.

  In step S100, the control unit 18 determines whether or not the transmission fan 15 that drives the ventilation fan 16 and generates airflow from the storage battery 11 side to the power conditioner 12 side is driven. When the ventilation fan 16 and the transmission fan 15 are operating, the process proceeds to step S101. When at least one of the fans is not driven, the process proceeds to step S102.

  In step S101, the control unit 18 determines whether or not the temperature of the storage battery 11 is less than the second set temperature and the temperature of the power conditioner 12 is less than the third set temperature. When the temperature of the storage battery 11 is equal to or higher than the second set temperature, or when the temperature of the power conditioner 12 is equal to or higher than the third set temperature, the temperature management process is terminated. When the temperature of the storage battery 11 is less than the second set temperature and the temperature of the power conditioner 12 is less than the third set temperature, the process proceeds to step S105.

  In step S102, the control unit 18 determines whether or not the temperature of the storage battery 11 is equal to or higher than the second set temperature, or whether the temperature of the power conditioner 12 is equal to or higher than the fourth set temperature. When the temperature of the storage battery 11 is equal to or higher than the second set temperature, or when the temperature of the power conditioner 12 is equal to or higher than the fourth set temperature, the process proceeds to step S103. When the temperature of the storage battery 11 is lower than the second set temperature and the temperature of the power conditioner 12 is lower than the fourth set temperature, the process proceeds to step S104.

  In step S103, the control unit 18 drives the ventilation fan 16 and drives the transmission fan 15 so as to generate an air flow from the storage battery 11 side to the power conditioner 12 side. After the ventilation fan 16 and the transmission fan 15 are driven, the temperature management process is terminated.

  In step S104, the control unit 18 determines whether or not the temperature of the power conditioner 12 is equal to or higher than a third set temperature. When the temperature of the inverter 12 is lower than the third set temperature, the process proceeds to step S105. When the temperature of the inverter 12 is equal to or higher than the third set temperature, the process proceeds to step S106.

  In step S105 that proceeds when at least the temperature of the power conditioner 12 is lower than the third set temperature in step S101 or step S104, the control unit 18 stops driving the ventilation fan 16. Stopping the drive of the ventilation fan 16 includes maintaining the stopped state of the ventilation fan 16 that is stopped. When the driving of the ventilation fan 16 is stopped, the process proceeds to step S107.

  In step S106, the control unit 18 drives the ventilation fan 16. When the ventilation fan 16 is driven, the process proceeds to step S107.

  In step S107, the control unit 18 determines whether or not the temperature of the storage battery 11 is equal to or lower than the first set temperature. When the temperature of the storage battery 11 is equal to or lower than the first set temperature, the process proceeds to step S108. When the temperature of the storage battery 11 exceeds the first set temperature, the process proceeds to step S109.

  In step S108, the control unit 18 determines whether or not a difference obtained by subtracting the temperature of the storage battery 11 from the temperature of the power conditioner 12 is equal to or greater than a predetermined temperature difference. When the temperature difference is less than the predetermined temperature difference, the process proceeds to step S109. When the temperature difference exceeds the predetermined temperature difference, the process proceeds to step S109.

  In step S109, the control unit 18 stops driving the transmission fan 15 that generates an airflow from the storage battery 11 side to the power conditioner 12 side or an airflow from the power conditioner 12 side to the storage battery 11 side. Stopping the driving of the transmission fan 15 includes maintaining the stopped state of the transmission fan 15 that is stopped. When driving of the transmission fan 15 is stopped, the temperature management process is terminated.

  In step S110, the control unit 18 drives the transmission fan 15 so as to cause an air flow from the power conditioner 12 side to the storage battery 11 side. Driving the transmission fan 15 includes maintaining the driving state of the transmission fan 15 being driven. When driving of the transmission fan 15 is started, the temperature management process is ended.

  According to the power storage system of the present embodiment configured as described above, when the temperature of the storage battery 11 is equal to or lower than the first set temperature, the transmission fan 15 is configured to generate an air flow from the power conditioner 12 side to the storage battery 11 side. To control. Therefore, the storage battery 11 is heated using the heat generated by the power conditioner 12. Therefore, a voltage increase due to an increase in internal resistance that occurs when the storage battery 11 is at a low temperature can be reduced. In order to reduce the deterioration of the storage battery 11 with respect to the voltage increase of the storage battery 11, it is conceivable to lower the charge / discharge current. However, the decrease in the charge / discharge current decreases the efficiency of use of the storage battery 11. However, in the power storage system of the present embodiment, it is possible to reduce the deterioration of the battery without lowering the charge / discharge current, and temperature management can be performed for other electrical devices other than the power conditioner 12.

  Further, according to the power storage system of the present embodiment, when the temperature of the storage battery 11 is equal to or higher than the second set temperature, the transmission fan 15 is controlled so as to generate an air flow from the storage battery 11 side to the power conditioner 12 side. Therefore, by driving the transmission fan 15, outside air is taken in from the vent of the housing 19, and deterioration of the storage battery 11 due to high temperature can be reduced.

  Further, according to the power storage system of this embodiment, when the temperature of the storage battery 11 is equal to or higher than the second set temperature, the inside of the housing 19 is ventilated, so that outside air is further taken in from the vent of the housing 19 and the The deterioration of the storage battery 11 due to can be further reduced.

  Further, according to the power storage system of the present embodiment, when charging / discharging the storage battery 11, the transmission fan 15 is controlled based on the temperature of the storage battery 11, so the storage battery 11 is unused and temperature management is unnecessary. In this case, unnecessary control of the transmission fan 15 is reduced.

  Further, according to the power storage system of the present embodiment, when the temperature difference between the storage battery 11 and the power conditioner 12 is less than the predetermined temperature difference, the driving of the transmission fan 15 is stopped. Therefore, when there is no temperature difference sufficient to heat the storage battery 11, it is possible to reduce power consumption by performing control for driving the transmission fan 15.

  Further, according to the power storage system of the present embodiment, when the power conditioner 12 is equal to or higher than the third set temperature, the ventilation fan 16 is driven. Deterioration of the inverter 12 can be reduced.

  In addition, according to the power storage system of the present embodiment, when the power conditioner 12 is equal to or higher than the fourth set temperature, an air flow is generated not only from the ventilation fan 16 but also from the storage battery 11 side to the power conditioner 12 side. Since the transmission fan 15 is driven, the deterioration of the power conditioner 12 due to a high temperature can be further reduced.

  Further, according to the power storage system of the present embodiment, since the transmission fan 15 and the ventilation fan 16 that are being driven are stopped based on the temperature of the storage battery 11 and the temperature of the power conditioner 12, the transmission fan 15 and the ventilation fan are unnecessary. The power consumption by driving 16 can be reduced.

Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention.

  For example, in the present embodiment, one of the transmission fans 15 generates airflow from the storage battery 11 side to the power conditioner 12 side and the other generates airflow from the power conditioner 12 side to the storage battery 11 side. It is not limited to such a structure. For example, the direction in which the airflow flows can be changed by configuring the transmission fan 15 as a single fan and reversing the rotation direction of the fan.

DESCRIPTION OF SYMBOLS 10 Power storage system 11 Storage battery 12 Power conditioner 13 1st temperature sensor 14 2nd temperature sensor 15 Transmission fan 16 Ventilation fan 17 Acquisition part 18 Control part 19 Case 20 1st fan 21 2nd fan

Claims (10)

A storage battery,
With the inverter,
A transmission fan for generating an air flow between the storage battery and the power conditioner;
A temperature sensor for detecting the temperature of the storage battery;
A controller that controls the transmission fan to generate an air flow from the power conditioner side to the storage battery side when the temperature of the storage battery detected by the temperature sensor is equal to or lower than a first set temperature. A featured power storage system. The power storage system according to claim 1,
When the temperature of the storage battery detected by the temperature sensor is equal to or higher than a second set temperature higher than the first set temperature, the control unit transmits the air flow from the storage battery side to the power conditioner side. A power storage system characterized by controlling a fan. The power storage system according to claim 2,
A ventilation fan that ventilates a housing that houses the storage battery and the power conditioner;
The said control part drives the said ventilation fan when the temperature of the said storage battery which the said temperature sensor detected is more than 2nd setting temperature. The electrical storage system characterized by the above-mentioned. It is an electrical storage system of any one of Claim 1 to 3, Comprising: The said transmission fan is arrange | positioned between the said storage battery and the said power conditioner. The electrical storage system characterized by the above-mentioned. The power storage system according to any one of claims 1 to 4,
The power transmission system, wherein the transmission fan includes a first fan and a second fan. The power storage system according to claim 5,
In the first fan and the second fan, the blades have the same inclination direction with respect to the rotation direction and rotate in opposite directions. The power storage system according to claim 5,
The power storage system, wherein the first fan and the second fan rotate in the same direction with the blades inclined in directions opposite to the rotation direction. The power storage system according to any one of claims 1 to 7,
The said control part performs control of the said transmission fan based on the temperature of the said storage battery, when charging / discharging the said storage battery. The electrical storage system characterized by the above-mentioned. An acquisition unit for acquiring the temperature of the storage battery;
When the temperature of the storage battery acquired by the acquisition unit is equal to or lower than a first set temperature, an air flow is generated between the storage battery and the power conditioner so that an air flow is generated from the power conditioner side to the storage battery side. A power management apparatus comprising: a control unit that controls the transmission fan to be operated. A detection step for detecting the temperature of the storage battery;
Transmission that generates airflow between the storage battery and the power conditioner so that an airflow is generated from the power conditioner side to the stored value side when the temperature of the storage battery detected in the detection step is equal to or lower than a first set temperature. And a control step for controlling the fan.

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