JP2019017163A - Storage battery unit and connector - Google Patents

Abstract

To provide a technique for simplifying installation of a storage battery unit.SOLUTION: A storage battery unit 20 includes storage battery. In addition, a first unit power terminal 46a to a third unit power terminal 46c inputs and outputs DC power of the storage battery. An attachment port 54 is provided with a first connector 32a that electrically connects the first unit power terminal 46a to the third unit power terminal 46c and an external power conversion device that performs conversion between the DC power and the AC power includes a first connector power terminal 50a to a third connector power terminal 50c respectively connected to the first unit power terminal 46a to the third unit power terminal 46c.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a storage battery unit and a connector, and more particularly to a storage battery unit and a connector that can be connected to each other.

  A storage battery unit installed in a facility such as a house is connected to a power conditioner, and the power conditioner is connected to a commercial power source. The power conditioner uses electric power supplied from a commercial power source to control charging and discharging of a storage battery provided in the storage battery unit (see, for example, Patent Document 1).

International Publication No. 16/157740

  When installing a storage battery unit, it was necessary for an electrician to visit the facility and to electrically connect the storage battery unit and the power conditioner by electrical work such as terminal processing.

  This invention is made | formed in view of such a condition, The objective is to provide the technique which simplifies installation of a storage battery unit.

  In order to solve the above problems, a storage battery unit according to an aspect of the present invention is a storage battery unit, which is a storage battery, a unit power terminal that inputs and outputs DC power of the storage battery, a unit power terminal, and DC power. A connector for electrically connecting an external power conversion device that performs conversion between AC power and a connector having a connector power terminal connected to a unit power terminal; .

  According to the present invention, installation of a storage battery unit can be simplified.

1 is a diagram illustrating a configuration of a power distribution system according to a first embodiment. It is a figure which shows the wiring in the storage battery unit of FIG. 1, a connector, and a power converter device. FIGS. 3A to 3C are views showing the structure of the storage battery unit and connector of FIG. 4 (a)-(b) are perspective views showing the structure of the storage battery unit and the first connector of FIGS. 3 (a)-(c). FIGS. 5A and 5B are exploded top views showing attachment and removal of the first connector to the storage battery unit of FIGS. 4A and 4B. 6 (a)-(b) are other exploded top views showing attachment and removal of the first connector to / from the storage battery unit of FIGS. 4 (a)-(b). It is a decomposition | disassembly top view which shows attachment and removal of the 1st connector from the storage battery unit which concerns on Example 2. FIG. It is another exploded top view which shows attachment and removal of the 1st connector from the storage battery unit which concerns on Example 2. FIG. It is a decomposition | disassembly top view which shows attachment and detachment | attachment of the connector to the storage battery unit which concerns on Example 3, and a power converter device. It is a figure which shows the wiring in the storage battery unit which concerns on Example 3, a connector, an electrical outlet, and a power converter device. It is a figure which shows the structure of the storage battery unit of FIG. 10, a connector, and an outlet socket.

Example 1
Before specifically describing the embodiments of the present invention, the knowledge that forms the basis of the embodiments will be described. A present Example is related with the power distribution system which can supply electric power to loads, such as household appliances in a facility, while being connected to the electric power grid | system which is a commercial power source. The power distribution system includes a power conditioner connected to the storage battery unit, that is, a power conversion device. Until now, when a storage battery unit is installed in a facility and the storage battery unit and the power conversion device are electrically connected, an electrician who has visited the facility has performed electrical work such as terminal processing.

  For this reason, it is desirable for residents, managers, and the like of facilities to make it easy to connect the storage battery unit and the power conversion device without requiring a visit by an electrician. In addition, the lid of the storage battery unit can be opened in electrical work such as terminal processing. However, in consideration of the guarantee of the storage battery unit, it is desirable that the storage battery unit and the power converter be easily connected without opening the lid. . In order to easily connect the storage battery unit and the power conversion device, for example, connection by a connector when supplying electric power to a home appliance can be considered. However, unlike home appliances that are supplied with AC power, DC power is input and output between the storage battery unit and the power converter, so safety should be ensured even when using connectors. is there. In addition, since direct-current power is input / output between the storage battery unit and the power converter, if a spark is blown between these terminals during connection, the direction of movement of the electrons is a single direction, and the terminals are likely to deteriorate. Become. Even if this is taken into consideration, safety should be ensured.

In order to ensure such safety, the following structure or configuration is required between the storage battery unit and the connector.
(1) When the connector is not attached to the storage battery unit, the circuit of the storage battery unit is cut off, that is, DC power cannot be input / output.
(2) A connector is attached to the storage battery unit, and the circuit of the storage battery unit is connected for the first time, that is, direct-current power can be input and output.
(3) When DC power is input / output in the storage battery unit, the connector cannot be removed from the storage battery unit.
(4) The connector can be removed from the storage battery unit when DC power is not input / output in the storage battery unit.

  In the following description, “parallel” and “vertical” include not only perfect parallel and vertical, but also include cases in which they deviate from parallel and vertical within an error range. Further, “substantially” means that they are the same in an approximate range.

  FIG. 1 shows a configuration of the power distribution system 100. The power distribution system 100 includes a solar cell module 10, a power conversion device 12, a power system 14, a load 16, a distribution line 18, and a storage battery unit 20. A cable 30 is disposed between the power converter 12 and the storage battery unit 20.

  The power system 14 is a commercial power supply and supplies AC power. The solar cell module 10 is a renewable energy power generation device. The solar cell module 10 directly converts light energy into electric power using the photovoltaic effect. As the solar cell, a silicon solar cell, a solar cell made of a compound semiconductor, a dye-sensitized type (organic solar cell), or the like is used. Instead of the solar cell module 10, another renewable energy power generation device may be used, and a fuel cell system may be used. The solar cell module 10 is connected to the power converter 12 and outputs the generated DC power to the power converter 12. The storage battery unit 20 includes a storage battery capable of charging and discharging electric power, and the storage battery includes a lithium ion storage battery, a nickel hydride storage battery, a lead storage battery, an electric double layer capacitor, a lithium ion capacitor, and the like. The storage battery unit 20 is connected to the power converter 12 via the cable 30.

  The power conversion device 12 is connected to the power system 14 via the distribution line 18, and is also connected to the solar cell module 10 and the storage battery unit 20. The power conversion device 12 is a bidirectional DC / AC inverter, converts AC power from the distribution line 18, that is, AC power from the power system 14 into DC power, and outputs the converted DC power to the storage battery unit 20. Further, the power conversion device 12 converts the DC power from the storage battery unit 20 into AC power, and outputs the converted AC power to the distribution line 18. That is, the storage battery unit 20 is charged and discharged by the power converter 12. Further, the power conversion device 12 converts the DC power from the solar cell module 10 into AC power, and outputs the converted AC power to the distribution line 18. In particular, the power converter 12 outputs AC power having a frequency synchronized with the frequency of AC power in the power system 14. In this way, the power conversion device 12 performs conversion between DC power and AC power.

  The distribution line 18 connects the power conversion device 12 and the power system 14 and branches from the intersection P between them to connect the load 16. For example, a distribution board is installed at the intersection P, and the AC power from the power system 14 is configured to be distributed to each device. The load 16 is a device that consumes power supplied via the distribution line 18. The load 16 includes devices such as a refrigerator, an air conditioner, and lighting. Here, one load 16 is connected, but a plurality of loads 16 may be connected.

  FIG. 2 shows wiring in the storage battery unit 20, the connector 32, and the power conversion device 12. The storage battery unit 20 includes a storage battery 40, a protection circuit 42, a switch 44, a first unit power terminal 46a, a second unit power terminal 46b, a third unit power terminal 46c, and a unit power terminal 46. A first unit communication terminal 48a and a second unit communication terminal 48b, which are collectively referred to as a communication terminal 48, are included. The connector 32 includes a first connector 32a, a second connector 32b, and a cable 30. The cable 30 includes a first power line 34a, a second power line 34b, a third power line 34c, and a communication line 36, which are collectively referred to as a power line 34, and a first communication line 36a and a second communication line 36b. The first connector 32a is collectively referred to as a first connector power terminal 50a, a second connector power terminal 50b, a third connector power terminal 50c, and a connector communication terminal 52, which are collectively referred to as a connector power terminal 50. It includes a first connector communication terminal 52a and a second connector communication terminal 52b.

  The storage battery 40 is composed of a plurality of cells connected in series, for example. The cell is, for example, a lithium ion battery. The total value of the voltages at both ends of the plurality of cells is the voltage value of DC power that can be output from the storage battery 40. The protection circuit 42 is a circuit for protecting the storage battery 40. Specifically, the protection circuit 42 outputs the temperature, voltage value, and current value of the storage battery 40 to the power conversion device 12 via the unit communication terminal 48, or from the storage battery 40 when an abnormality occurs. Cut off the supplied current. The unit power terminal 46 is a terminal capable of inputting and outputting DC power of the storage battery 40. The first unit power terminal 46a is a “+” terminal, the second unit power terminal 46b is a “−” terminal, and the third unit power terminal 46c is a “ground” terminal.

  The first unit power terminal 46 a is connected to the storage battery 40 via the switch 44. The switch 44 is a component for switching between the case where DC power input / output to / from the storage battery 40 is enabled and the case where DC power input / output is disabled, and corresponds to a breaker switch. Here, DC power can be input / output when the switch 44 is on, and DC power cannot be input / output when the switch 44 is off. The second unit power terminal 46b is connected to the protection circuit 42, and the third unit power terminal 46c is connected to the ground. The first unit communication terminal 48a and the second unit communication terminal 48b are terminals to which signals in communication with the power converter 12 are input / output. The first unit communication terminal 48 a and the second unit communication terminal 48 b are connected to the protection circuit 42.

  A first connector 32a is disposed on one end side of the cable 30, and a second connector 32b is disposed on the other end side. Below, the direction which should be connected to the storage battery unit 20 is set as the 1st connector 32a, and the direction which should be connected other than the storage battery unit 20, for example, the power converter device 12, is set as the 2nd connector 32b. The first connector power terminal 50a is connectable to the first unit power terminal 46a, the second connector power terminal 50b is connectable to the second unit power terminal 46b, and the third connector power terminal 50c is It can be connected to the third unit power terminal 46c. The first connector communication terminal 52a can be connected to the first unit communication terminal 48a, and the second connector communication terminal 52b can be connected to the second unit communication terminal 48b.

  The second connector 32b also includes the same terminals as the connector power terminal 50 and the connector communication terminal 52, but the description thereof is omitted here. Note that these terminals can be connected to the terminals of the power converter 12. The first power line 34a is connected to the first connector power terminal 50a, the second power line 34b is connected to the second connector power terminal 50b, and the third power line 34c is connected to the third connector power terminal 50c. The power line 34 electrically connects the storage battery unit 20 and the power conversion device 12 to transmit DC power. The first communication line 36a is connected to the first connector communication terminal 52a, the second communication line 36b is connected to the second connector communication terminal 52b, and the communication line 36 is connected to the storage battery unit 20 and the power converter. A signal is transmitted to and from 12.

  3A to 3C show the structure of the storage battery unit 20 and the connector 32. FIG. 3A is a front perspective view of the storage battery unit 20, FIG. 3B is a rear perspective view of the storage battery unit 20, and FIG. 3C shows the structure of the connector 32. As shown in FIGS. 3A to 3B, an orthogonal coordinate system including an x-axis, a y-axis, and a z-axis is defined. The x axis and the y axis are orthogonal to each other in the top surface or the bottom surface of the storage battery unit 20. The z axis is perpendicular to the x axis and the y axis, and extends in the height (vertical) direction of the storage battery unit 20. Further, the positive directions of the x-axis, y-axis, and z-axis are each defined in the direction of the arrow in FIGS. 3A to 3B, and the negative direction is defined in the direction opposite to the arrow. . Also, the positive direction side of the x axis is “front side” or “front side”, the negative direction side of the x axis is “rear side” or “rear side”, and the positive direction side of the z axis is “upper side” or “top side” The negative direction side of the z-axis is sometimes referred to as “lower side” or “bottom side”. Furthermore, the y-axis direction may be referred to as “side surface side”.

  The storage battery unit 20 has a box shape that is long in the height direction. On the rear surface of the storage battery unit 20 and the surface on the positive direction side of the y-axis, an attachment port 54 having a recessed shape is formed near the uppermost side. An attachment port first surface 62 facing the rear side and an attachment port second surface 64 facing the positive direction side of the y-axis are continuously arranged in the attachment port 54. The unit power terminal 46 and the unit communication terminal 48 are disposed on the attachment port first surface 62.

  The first connector 32a disposed on one end side of the cable 30 has a box shape. The first connector 32a can also be referred to as a housing, and houses the connector power terminal 50 and the connector communication terminal 52 on one surface thereof. The first connector 32 a is attached to the attachment port 54 with the surface on which the connector power terminal 50 and the connector communication terminal 52 are disposed facing the attachment port first surface 62. Therefore, the size of the first connector 32a is set to be equal to or smaller than the size of the attachment port 54. As described above, when the attachment port 54 attaches the first connector 32a, the unit power terminal 46 and the connector power terminal 50 are electrically connected.

  FIGS. 4A and 4B are perspective views showing structures of the storage battery unit 20 and the first connector 32a. FIG. 4A is a front perspective view of the storage battery unit 20, and shows the top surface through to show the internal structure. FIG. 4B is a rear perspective view of the storage battery unit 20. These indicate immediately before the first connector 32a is attached to the attachment port 54 or immediately after the first connector 32a is removed from the attachment port 54. A connector first surface 56 is disposed on the front side of the first connector 32a. On the connector first surface 56, the connector power terminal 50 and the connector communication terminal 52 are arranged side by side in the y-axis direction. A connector second surface 58 is disposed on the side surface on the negative direction side of the y-axis with respect to the connector first surface 56.

  The storage battery unit 20 is provided with a mounting port first surface 62 and a mounting port second surface 64 as in FIG. That is, the attachment port first surface 62 faces the connector first surface 56, and the attachment port second surface 64 faces the connector second surface 58. The unit power terminal 46 and the unit communication terminal 48 are arranged in the y-axis direction on the attachment port first surface 62. Two first holes 66 are provided in the attachment port first surface 62 so as to sandwich them from both sides in the y-axis direction. A first moving piece 70 extending in the y-axis direction is disposed on the front side of the attachment port first surface 62, and first moving piece convex portions 72 protrude rearward from both ends of the first moving piece 70. The first moving piece convex portion 72 can project toward the attachment port 54 through the first hole portion 66.

  A second hole 68 is provided in the attachment port second surface 64. From the second hole 68, the second movable piece convex portion 76 can protrude toward the attachment port 54. The second moving piece convex portion 76 projects to the positive direction side of the y axis in the second moving piece 74 disposed on the negative direction side of the y axis of the attachment port second surface 64. The second moving piece 74 is provided with a second moving piece opening 78, and the switch 44 is disposed in the second moving piece opening 78. Here, FIGS. 5 (a)-(b) and 6 (a)-(b) are used to describe the structure and operation of the first moving piece 70, the second moving piece 74, and the switch 44 in detail. To do.

  FIGS. 5A and 5B are exploded top views showing attachment and detachment of the first connector 32 a to the storage battery unit 20. FIG. 5A shows a state before the first connector 32 a is attached to the attachment port 54. The first moving piece 70 is supported by a spring 90 from the front side. When the first connector 32 a is detached from the attachment port 54, a rearward force by the spring 90 is applied to the first moving piece 70. Therefore, the first moving piece convex portion 72 of the first moving piece 70 is exposed to the attachment port 54 through the first hole 66 of the attachment port first surface 62. That is, the first moving piece convex portion 72 protrudes rearward from the attachment port first surface 62. In that case, the 1st movement piece convex part 72 of the one near the attachment port 2nd surface 64 is arrange | positioned so that the 2nd hole 68 provided in the attachment port 2nd surface 64 may be plugged up.

  As a result, even when trying to move the second moving piece 74 to the positive direction side of the y-axis, the tip of the second moving piece convex portion 76 provided so as to protrude to the positive direction side of the y-axis of the second moving piece 74 Interferes with the first moving piece convex portion 72. Accordingly, the second movable piece convex portion 76 cannot be exposed to the attachment port 54 through the second hole 68. That is, the second moving piece convex portion 76 cannot protrude from the attachment port second surface 64 to the positive direction side of the y axis by the first moving piece convex portion 72. On the other hand, the switch 44 is arranged at either the position on the negative direction side of the y-axis or the position on the positive direction side of the y-axis. Here, the switch 44 is turned off when it is arranged at a position on the negative direction side of the y-axis, and the switch 44 is turned on when it is arranged at a position on the positive direction side of the y-axis.

  When the second moving piece convex portion 76 is arranged as described above, the second moving piece opening 78 provided in the second moving piece 74 is such that the switch 44 is positioned on the negative direction side of the y axis. Placed in. Therefore, the switch 44 is turned off, and DC power in the storage battery 40 (not shown) is not input / output. That is, the unit power terminal 46 does not input / output DC power when the second movable piece convex portion 76 does not protrude from the attachment port second surface 64. In summary, when the first connector 32 a is removed from the attachment port 54, the second moving piece 74 cannot move so that the second moving piece convex portion 76 protrudes from the attachment port 54. Will not be able to turn on. As a result, the unit power terminal 46 cannot input or output DC power.

  FIG. 5B shows a state in which a part of the first connector 32 a is inserted into the attachment port 54, but the first connector 32 a is not yet attached to the attachment port 54. Even in this state, the connector first surface 56 of the first connector 32 a is not in contact with the first moving piece convex portion 72. Therefore, a rearward force by the spring 90 is applied to the first moving piece 70, and the first moving piece convex portion 72 is disposed at the same position as in FIG. As a result, the unit power terminal 46 does not input / output DC power.

  FIGS. 6A and 6B are other exploded top views showing attachment and detachment of the first connector 32 a to the storage battery unit 20. FIG. 6A shows a case where the first connector 32 a is attached to the attachment port 54. Since the first moving piece convex portion 72 is pushed by the connector first surface 56 by the attachment, the first moving piece 70 moves in the front direction. Thereby, the tip of the first moving piece convex portion 72 returns to the attachment port first surface 62. Moreover, the connector recessed part 60 formed in the connector 2nd surface 58 of the 1st connector 32a is arrange | positioned in the position which opposes the 2nd hole 68 of the attachment port 2nd surface 64 by attachment. Furthermore, the unit power terminal 46 and the connector power terminal 50 are connected by attachment, and the unit communication terminal 48 and the connector communication terminal 52 are connected. However, in FIG. 6A, since the switch 44 is OFF, the unit power terminal 46 does not input / output DC power.

  FIG. 6B shows a case where the switch 44 is moved in the positive direction of the y-axis from FIG. By this movement, the second moving piece opening 78 and the second moving piece 74 are also moved in the same direction. As shown in FIG. 6A, since the second hole 68 and the connector recess 60 are connected, the second moving piece convex portion 76 that has moved in the positive direction of the y-axis moves the second hole 68 through the second hole 68. And is inserted into the connector recess 60. That is, the second movable piece convex portion 76 can project in the positive direction of the y-axis from the mounting port second surface 64 until it is fitted into the connector concave portion 60 when the first connector 32a is mounted in the mounting port 54. At that time, since the switch 44 is disposed at the position on the positive direction side of the y-axis, the switch 44 is turned on. As a result, the unit power terminal 46 inputs and outputs DC power.

  When the first connector 32a is attached to the attachment port 54 as shown in FIG. 6B and the switch 44 is turned on, the second moving piece convex portion 76 is fitted in the connector concave portion 60. 1 The connector 32a cannot be moved rearward. That is, the first connector 32 a cannot be removed from the attachment port 54 when the unit power terminal 46 inputs and outputs DC power. On the other hand, as shown in FIG. 6 (b) to FIG. 6 (a), by turning off the switch 44, the second moving piece convex portion 76 is not fitted into the connector concave portion 60. It can be moved in the direction. That is, the first connector 32a can be removed from the attachment port 54 when the unit power terminal 46 does not input / output DC power.

  According to the present embodiment, since the first connector 32a for electrically connecting the unit power terminal 46 and the power converter 12 is attached to the attachment port 54, the installation of the storage battery unit 20 can be simplified. Moreover, since the unit power terminal 46 and the connector power terminal 50 are connected by attaching the first connector 32a to the attachment port 54, electrical work can be eliminated. In addition, DC power cannot be input / output when the first connector 32a is removed from the attachment port 54, and DC power can be input / output when the first connector 32a is attached to the attachment port 54. Therefore, safety can be ensured. Moreover, since direct-current power cannot be input / output when the first connector 32a is removed from the attachment port 54, it is possible to suppress the occurrence of a situation in which sparks fly when the attachment port 54 is attached to the first connector 32a. Moreover, since the occurrence of a situation where the sparks fly is suppressed, the deterioration of the terminal can be suppressed.

  In addition, when the first connector 32a is attached to the attachment port 54, the first connector 32a cannot be removed from the attachment port 54 when the unit power terminal 46 inputs / outputs DC power. Therefore, safety can be ensured. Further, when the first connector 32a is attached to the attachment port 54, the first connector 32a can be removed from the attachment port 54 when the unit power terminal 46 does not input / output DC power. The first connector 32a can be safely removed.

  Further, when the first connector 32a is detached from the attachment port 54, the first moving piece 70 protrudes from the attachment port first surface 62, and the second moving piece 74 is attached to the attachment port second surface by the first moving piece 70. Since it is impossible to protrude from 64, it is possible to make DC power input / output impossible. Further, when the first connector 32 a is attached to the attachment port 54. Since the first moving piece 70 can return from the attachment port second surface 64 until it returns to the attachment port first surface 62 and is fitted into the connector recess 60, input / output of DC power can be enabled. Moreover, since the housing | casing of the 1st connector 32a is attached to the attachment port 54, installation of the storage battery unit 20 can be simplified.

  Moreover, since the terminal processing at the time of construction is unnecessary and the installation of the storage battery unit 20 is simplified, the reliability of construction can be improved. Moreover, since the terminal processing at the time of construction is unnecessary and the installation of the storage battery unit 20 is simplified, the working time can be shortened. Moreover, since the terminal processing at the time of construction is unnecessary and the installation of the storage battery unit 20 is simplified, it is possible to prevent foreign matter from being mixed when the storage battery unit 20 is opened. Moreover, since it is comprised so that electric power may not be supplied to the unit power terminal 46 in the state which the 1st connector 32a removed, the safety | security of a builder and a user can be ensured. In addition, it is possible to suppress a decrease in terminal durability due to arc discharge between the unit power terminal 46 and the connector power terminal 50.

  The outline of one embodiment of the present invention is as follows. A storage battery unit 20 according to an aspect of the present invention is a storage battery unit 20, which includes a storage battery 40, a unit power terminal 46 that inputs and outputs DC power of the storage battery 40, a unit power terminal 46, DC power, and AC power. A first connector 32a for electrically connecting an external power conversion device 12 that performs conversion between and a connector power terminal 50 connected to a unit power terminal 46. And an attachment port 54 for attaching the connector 32a.

  The unit power terminal 46 cannot input / output DC power when the first connector 32 a is removed from the attachment port 54, and receives DC power when the first connector 32 a is attached to the attachment port 54. Input / output may be possible.

  In the state where the first connector 32a is attached to the attachment port 54, when the unit power terminal 46 inputs and outputs DC power, the first connector 32a cannot be removed from the attachment port 54, and the unit The first connector 32a may be detachable from the attachment port 54 when the power terminal 46 does not input / output DC power.

  The first connector 32 a may include a connector first surface 56 on which the connector power terminals 50 are arranged, and a connector second surface 58 that is a side surface of the connector first surface 56 and has a connector recess 60. The mounting port 54 includes a mounting port first surface 62 that faces the connector first surface 56 and on which the unit power terminal 46 is disposed, and a mounting port second surface 64 that faces the connector second surface 58. Good. The storage battery unit 20 protrudes from the attachment port first surface 62 when the first connector 32 a is removed from the attachment port 54, and the attachment port first surface when the first connector 32 a is attached to the attachment port 54. When the first connector 32a is attached to the first moving piece 70 returning to 62 and the attachment port 54, it can protrude from the attachment port second surface 64 until it is fitted into the connector recess 60, and the first through the attachment port 54. You may further provide the 2nd moving piece 74 which cannot protrude from the attachment port 2nd surface 64 by the 1st moving piece 70, when the connector 32a is removed. The unit power terminal 46 inputs / outputs DC power when the second moving piece 74 protrudes from the attachment port second surface 64 until the second moving piece 74 is fitted into the connector recess 60, and the second moving piece 74 is connected to the attachment port second surface 64. In the case of non-protruding from DC, the DC power may be non-input / output.

  The first connector 32a is a first connector 32a for electrically connecting the storage battery unit 20 and an external power conversion device 12 that performs conversion between direct current power and alternating current power. A connector power terminal 50 connected to the terminal 46; and a housing that houses the connector power terminal 50 and is attached to the attachment port 54.

(Example 2)
Next, Example 2 will be described. The second embodiment relates to the attachment and detachment of the connector with respect to the storage battery unit, as in the first embodiment. In Example 1, in order to ensure the safety in attachment and detachment of a connector, the mechanism of the 1st moving piece and the 2nd moving piece was utilized. On the other hand, in Example 2, the safety in the attachment and removal of the connector is ensured by the circuit configuration. Here, it demonstrates centering on the difference from before.

  FIG. 7 is an exploded top view showing attachment and detachment of the first connector 32 a to the storage battery unit 20. The storage battery unit 20 includes a switch 44, a first unit power terminal 46 a collectively referred to as a unit power terminal 46, a second unit power terminal 46 b, a mounting port 54, and a first unit collectively referred to as a unit non-power terminal 110. Non-power terminal 110a, second unit non-power terminal 110b, unit control board 114, OR circuit 116, AND circuit 118, and circuit switching device 120, mounting port 54 is mounting port first surface 62, mounting port first 2 sides 64 are included. A first connector 32 a is connected to one end of the cable 30. The first connector 32 a includes a connector first surface 56, a connector second surface 58, a first connector power terminal 50 a collectively called a connector power terminal 50, a second connector power terminal 50 b, and a connector non-power terminal 112. The first connector non-power terminal 112a and the second connector non-power terminal 112b are collectively referred to.

  The first connector 32a has a box shape as before. The first connector power terminal 50a and the second connector power terminal 50b are disposed on the connector first surface 56 of the first connector 32a. Note that the third connector power terminal 50c may be arranged in the same manner as before. Further, the first connector non-power terminal 112 a and the second connector non-power terminal 112 b are also arranged on the connector first surface 56. The first connector non-power terminal 112a and the second connector non-power terminal 112b are electrically connected. That is, they are short-circuited.

  An attachment port 54 is formed on the rear surface of the storage battery unit 20 and the surface on the positive direction side of the y-axis as before. The first unit power terminal 46a and the second unit power terminal 46b are connectable to the first connector power terminal 50a and the second connector power terminal 50b on the mounting port first surface 62 of the mounting port 54. Be placed. The third unit power terminal 46c may be arranged in the same manner as before. Further, the first unit non-power terminal 110a and the second unit non-power terminal 110b are connected to the first connector non-power terminal 112a and the second connector non-power terminal 112b on the attachment port first surface 62. Arranged as possible.

  The switch 44 is the same as before, but outputs “1” when turned on and outputs “0” when turned off. The unit control board 114 is a board for controlling the storage battery unit 20, and outputs “1” when turned on and outputs “0” when turned off. The OR circuit 116 performs an OR operation between the output from the switch 44 and the output from the unit control board 114. Therefore, “1” is output when at least one of the output from the switch 44 and the output from the unit control board 114 is “1”, and “0” is output when both are “0”. To do.

  When the first connector 32 a is removed from the attachment port 54, the connector non-power terminal 112 is not connected to the unit non-power terminal 110. Therefore, since the first unit non-power terminal 110 a and the second unit non-power terminal 110 b are opened, the unit non-power terminal 110 outputs “0” to the AND circuit 118. On the other hand, when the first connector 32 a is attached to the attachment port 54, the connector non-power terminal 112 is connected to the unit non-power terminal 110. Therefore, since the first unit non-power terminal 110 a and the second unit non-power terminal 110 b are short-circuited, the unit non-power terminal 110 outputs “1” to the AND circuit 118.

  The AND circuit 118 outputs “1” when both the output from the OR circuit 116 and the output from the unit non-power terminal 110 are “1”, and outputs “0” otherwise. . The circuit switching device 120 controls the input / output of DC power in the storage battery 40 (not shown) according to the input from the AND circuit 118. More specifically, when the input from the AND circuit 118 is “1”, the circuit switching device 120 inputs / outputs DC power in the storage battery 40. On the other hand, the circuit switching device 120 does not input / output DC power in the storage battery 40 when the input from the AND circuit 118 is “0”. Therefore, the unit power terminal 46 inputs and outputs DC power when the connector non-power terminal 112 is connected to the unit non-power terminal 110, but the connector non-power terminal 112 connects to the unit non-power terminal 110. Does not input / output DC power when is not connected.

  The structure of the unit power terminal 46 and the unit non-power terminal 110 may be as follows. FIG. 8 is another exploded top view showing attachment and detachment of the first connector 32 a to the storage battery unit 20. This corresponds to an enlarged view of the vicinity of the attachment port 54 and the first connector 32a in FIG. The unit power terminal 46 projects rearward from the attachment port first surface 62. The unit non-power terminal 110 also protrudes rearward from the attachment port first surface 62. Here, the unit non-power terminal 110 is shorter than the unit power terminal 46. On the other hand, the connector power terminal 50 and the connector non-power terminal 112 in the first connector 32a have the same structure as before.

  When the first connector 32a is attached to the attachment port 54 from the state in which the first connector 32a is removed from the attachment port 54 with the switch 44 turned on, the attachment port first surface 62 and the connector first surface 56 are You can get closer. Since the unit power terminal 46 is longer than the unit non-power terminal 110, even if the unit power terminal 46 and the connector power terminal 50 are connected, the unit non-power terminal 110 and the connector non-power terminal 112 are not connected. Not connected. In this state, the unit power terminal 46 does not input / output DC power. Thereafter, the attachment port first surface 62 and the connector first surface 56 are brought closer to each other, and the unit non-power terminal 110 and the connector non-power terminal 112 are connected. In this state, the unit power terminal 46 inputs and outputs DC power.

  On the other hand, when the first connector 32a is removed from the attachment port 54 in a state where the unit power terminal 46 inputs and outputs DC power, the attachment port first surface 62 and the connector first surface 56 are separated. As described above, since the unit power terminal 46 is longer than the unit non-power terminal 110, the unit non-power terminal 110 and the connector non-terminal are connected while the unit power terminal 46 and the connector power terminal 50 are connected. The power terminal 112 is released. In this state, the unit power terminal 46 does not input / output DC power. Thereafter, the attachment port first surface 62 and the connector first surface 56 are further separated, and the unit non-power terminal 110 and the connector non-power terminal 112 are separated.

  According to the present embodiment, DC power is input / output when the connector non-power terminal 112 is connected to the unit non-power terminal 110, and therefore when the first connector 32 a is attached to the attachment port 54. DC power can be input / output. Further, when the connector non-power terminal 112 is not connected to the unit non-power terminal 110, DC power is not input / output. Therefore, when the first connector 32a is removed from the attachment port 54, the DC power input is not performed. Output can be disabled. Further, since the connector non-power terminal 112 connected to the unit non-power terminal 110 is provided in the first connector 32a, the control using the unit non-power terminal 110 and the connector non-power terminal 112 can be executed.

  Further, since the unit non-power terminal 110 is made shorter than the unit power terminal 46, the unit non-power terminal 110 and the connector non-power terminal 112 are connected after the unit power terminal 46 and the connector power terminal 50 are connected. Can connect. Further, since the unit non-power terminal 110 and the connector non-power terminal 112 are connected later, when the unit power terminal 46 and the connector power terminal 50 are connected, it becomes impossible to input / output DC power. it can.

  Also, since the unit non-power terminal 110 is made shorter than the unit power terminal 46, the unit non-power terminal 110 and the connector non-power terminal 112 are disconnected before the unit power terminal 46 and the connector power terminal 50 are disconnected. And can be disconnected. Further, since the unit non-power terminal 110 and the connector non-power terminal 112 are disconnected first, DC power cannot be input / output when the unit power terminal 46 and the connector power terminal 50 are disconnected. Can be.

  The outline of one embodiment of the present invention is as follows. The first connector 32a may include a connector non-power terminal 112. The present storage battery unit 20 may further include a unit non-power terminal 110. The unit power terminal 46 inputs and outputs DC power when the connector non-power terminal 112 is connected to the unit non-power terminal 110, and the connector non-power terminal 112 is not connected to the unit non-power terminal 110. In this case, the DC power may be non-input / output.

  The unit power terminal 46 projects, the unit non-power terminal 110 projects, and the unit non-power terminal 110 is shorter than the unit power terminal 46.

  A connector non-power terminal 112 connected to the unit non-power terminal 110 may be further provided.

(Example 3)
Next, Example 3 will be described. The third embodiment relates to the attachment and detachment of the connector with respect to the storage battery unit as before. So far, only the relationship between the storage battery unit and the connector has been described. On the other hand, in the third embodiment, a relationship including other devices such as a power conversion device will be described. Here, it demonstrates centering on the difference from before.

  FIG. 9 is an exploded top view showing attachment and detachment of the connector 32 to the storage battery unit 20 and the power conversion device 12. This includes the second connector 32b, the power line 34, the communication line 36, and the power converter 12 in addition to FIG. The second connector 32b includes a first connector non-power terminal 122a and a second connector non-power terminal 122b, which are collectively referred to as a connector non-power terminal 122, and the power conversion device 12 includes an outlet non-power terminal 124. And a first outlet non-power terminal 124a and a second outlet non-power terminal 124b.

  The power line 34 is the same as that in FIG. 2, and electrically connects the storage battery unit 20 and the power conversion device 12. On the other hand, the first connector non-power terminal 112a of the first connector 32a and the first connector non-power terminal 122a of the second connector 32b are connected by the first communication line 36a. In addition, the second connector non-power terminal 112b of the first connector 32a and the second connector non-power terminal 122b of the second connector 32b are connected by the second communication line 36b. Further, the first connector non-power terminal 122 a can be connected to the first outlet non-power terminal 124 a of the power converter 12, and the second connector non-power terminal 122 b is used for the second outlet of the power converter 12. It can be connected to the non-power terminal 124b. Moreover, the non-power terminal 124a for the first outlet and the non-power terminal 124b for the second outlet are short-circuited.

  With this configuration, when the first connector 32a is attached to the storage battery unit 20, the unit non-power terminal 110 and the connector non-power terminal 112 are connected. When the second connector 32b is attached to the power converter 12, the connector non-power terminal 122 and the outlet non-power terminal 124 are connected. When both are connected, the first unit non-power terminal 110 a and the second unit non-power terminal 110 b are short-circuited, so that the unit non-power terminal 110 outputs “1” to the AND circuit 118. On the other hand, if either one is not connected, the first unit non-power terminal 110 a and the second unit non-power terminal 110 b are opened, so that the unit non-power terminal 110 outputs “0” to the AND circuit 118. .

  That is, the unit power terminal 46 can input and output DC power when the second connector 32 b is connected to the power converter 12. On the other hand, the unit power terminal 46 does not input / output DC power when the second connector 32 b is not connected to the power converter 12.

  FIG. 10 shows wiring in the storage battery unit 20, the connector 32, the outlet 38, and the power conversion device 12. This includes an outlet 38 in addition to FIG. The outlet 38 is generally referred to as a switch 80, a first outlet power terminal 82 a collectively referred to as an outlet power terminal 82, a second outlet power terminal 82 b, a third outlet power terminal 82 c, and an outlet communication terminal 84. It includes a one outlet communication terminal 84a and a second outlet communication terminal 84b. The second connector 32b is collectively referred to as a first connector power terminal 92a, a second connector power terminal 92b, a third connector power terminal 92c, and a connector communication terminal 94, which are collectively referred to as a connector power terminal 92. It includes a first connector communication terminal 94a and a second connector communication terminal 94b.

  The outlet 38 is disposed between the second connector 32 b and the power conversion device 12. For example, the outlet 38 is provided on the wall of a room where the storage battery unit 20 is installed in a facility. When the second connector 32 b is attached to the outlet 38, the first connector power terminal 92 a of the second connector 32 b is connected to the first outlet power terminal 82 a of the outlet 38. Similarly, the second connector power terminal 92b is connected to the second outlet power terminal 82b, and the third connector power terminal 92c is connected to the third outlet power terminal 82c. Further, the first connector communication terminal 94a is connected to the first outlet communication terminal 84a, and the second connector communication terminal 94b is connected to the second outlet communication terminal 84b. As described above, the second connector 32 b can be connected to the power conversion device 12 through the outlet 38.

  The structure related to the connection between the outlet power terminal 82 of the outlet 38 and the connector power terminal 92 of the second connector 32b is the same as the unit power terminal 46 of the storage battery unit 20 and the connector power terminal 50 of the first connector 32a. It is the same as the structure regarding connection. In addition, the structure related to the connection between the outlet communication terminal 84 of the outlet 38 and the connector communication terminal 94 of the second connector 32b includes the unit communication terminal 48 of the storage battery unit 20 and the connector communication terminal 52 of the first connector 32a. This is similar to the structure related to the connection. Further, the switch 80 of the outlet 38 is the same as the switch 44 of the storage battery unit 20.

  Therefore, the unit power terminal 46 can input and output DC power when the second connector 32 b is connected to the outlet power terminal 82 and the outlet communication terminal 84 of the outlet 38. On the other hand, the unit power terminal 46 cannot input / output DC power when the second connector 32 b is not connected to the outlet power terminal 82 and the outlet communication terminal 84 of the outlet 38.

  FIG. 11 shows the structure of the storage battery unit 20, the connector 32, and the outlet 38. As shown in the figure, the second connector 32b can be attached to the outlet 38, and the outlet power terminal 82, the outlet communication terminal 84, the outlet moving piece convex portion 86, and the like are arranged in the attachment portion. A switch 80 is disposed beside the attachment portion. The structure of the outlet 38 may be provided in the power conversion device 12. Further, an outlet 38 disposed between the second connector 32b and the power converter 12 may be provided in the case of FIG.

  According to the present embodiment, when the second connector 32b is not connected to the power converter 12, DC power cannot be input / output, and thus safety can be ensured. In addition, when the second connector 32b is connected to the power conversion device 12, DC power can be input and output, so that safety can be ensured. In addition, when the second connector 32b is not connected to the outlet 38, DC power cannot be input / output, so that safety can be ensured. Further, since the DC power can be input / output when the second connector 32b is connected to the outlet 38, safety can be ensured. Moreover, since the storage battery unit 20 and the electrical outlet 38 are connected by the connector 32, the storage battery unit 20 and the power converter device 12 can be installed in another room. Moreover, since the storage battery unit 20 and the power converter device 12 can be installed in different rooms, the degree of freedom in layout can be improved.

  The outline of one embodiment of the present invention is as follows. The unit power terminal 46 cannot input / output DC power when the second connector 32 b is not connected to the power converter 12, and DC when the second connector 32 b is connected to the power converter 12. Power may be input / output.

  The second connector 32b can be connected to the power conversion device 12 via the outlet 38, and the unit power terminal 46 cannot input / output DC power when the second connector 32b is not connected to the outlet 38. Yes, DC power may be input / output when the second connector 32 b is connected to the outlet 38.

  In the above, this invention was demonstrated based on the Example. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to each of those constituent elements or combinations of processing processes, and such modifications are also within the scope of the present invention. .

  Any combination of Examples 1 to 3 is also effective. According to this modification, it is possible to obtain the effect of any combination of the first to third embodiments.

  For example, although the connector 32 has shown the example containing the 1st connector 32a, the 2nd connector 32b, and the cable 30, the cable 30 does not necessarily need to be provided.

  Also, finger protection may be applied to various terminals. According to this modification, safety can be further improved.

  DESCRIPTION OF SYMBOLS 10 Solar cell module, 12 Power converter, 14 Power system, 16 Load, 18 Distribution line, 20 Storage battery unit, 30 Cable, 32 Connector, 34 Power line, 36 Communication line, 38 Outlet, 40 Storage battery, 42 Protection circuit, 44 Switch , 46 Unit power terminal, 48 Unit communication terminal, 50 Connector power terminal, 52 Connector communication terminal, 54 Mounting port, 56 Connector first surface, 58 Connector second surface, 60 Connector recess, 62 Mounting port first Surface, 64 mounting port second surface, 66 first hole portion, 68 second hole portion, 70 first moving piece, 72 first moving piece convex portion, 74 second moving piece, 76 second moving piece convex portion, 78 Second moving piece opening, 90 spring, 100 power distribution system.

Claims (10)

A storage battery unit,
A storage battery,
A power terminal for a unit that inputs and outputs DC power of the storage battery;
A connector for electrically connecting the unit power terminal and an external power converter that performs conversion between DC power and AC power, and is connected to the unit power terminal A mounting opening for attaching a connector having a power terminal for use,
A storage battery unit comprising:   The unit power terminal cannot input / output DC power when the connector is removed from the attachment port, and can input / output DC power when the connector is attached to the attachment port. The storage battery unit according to claim 1, wherein the storage battery unit is provided.   In the state where the connector is attached to the attachment port, when the unit power terminal inputs and outputs DC power, the connector cannot be removed from the attachment port, and the unit power terminal 3. The storage battery unit according to claim 1, wherein the connector is detachable from the attachment port when DC power is not input / output. 4. The connector includes a connector first surface on which the connector power terminals are arranged, and a connector second surface that is a side surface of the connector first surface and has a connector recess,
The mounting opening is
An attachment port first surface facing the connector first surface and disposing the unit power terminals;
An attachment port second surface facing the connector second surface;
This storage battery unit
A first moving piece that protrudes from the first surface of the attachment port when the connector is removed from the attachment port, and returns to the first surface of the attachment port when the connector is attached to the attachment port;
When the connector is attached to the attachment port, it can project from the second surface of the attachment port until it is fitted into the connector recess, and the first moving piece when the connector is removed from the attachment port And a second moving piece that cannot protrude from the second surface of the attachment port by
The unit power terminal inputs and outputs direct-current power when the second moving piece protrudes from the attachment port second surface until the second moving piece is fitted in the connector recess, and the second moving piece is connected to the attachment port second surface. 2. The storage battery unit according to claim 1, wherein DC power is not input / output when it is not protruding from the battery. The connector includes a non-power terminal for a connector,
This storage battery unit
Further equipped with a non-power terminal for the unit,
The unit power terminal inputs / outputs DC power when the connector non-power terminal is connected to the unit non-power terminal, and the connector non-power terminal is not connected to the unit non-power terminal. The storage battery unit according to claim 1, wherein DC power is not input / output when The unit power terminal protrudes,
The non-power terminal for the unit protrudes,
The storage battery unit according to claim 5, wherein the unit non-power terminal is shorter than the unit power terminal.   The unit power terminal cannot input / output DC power when the connector is not connected to the power converter, and inputs / outputs DC power when the connector is connected to the power converter. The storage battery unit according to claim 2, which is possible. The connector is connectable to the power conversion device through an outlet,
The unit power terminal cannot input / output DC power when the connector is not connected to the outlet, and can input / output DC power when the other end of the connector is connected to the outlet. The storage battery unit according to claim 2, wherein: A connector for electrically connecting the storage battery unit according to any one of claims 1 to 8 and an external power converter that performs conversion between DC power and AC power,
A connector power terminal connected to the unit power terminal;
A housing that houses the connector power terminal and is attached to the attachment port;
A connector comprising:   The connector according to claim 9, further comprising a connector non-power terminal connected to the unit non-power terminal.

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