JP2013045593A - Power supply device and temperature detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device capable of precisely obtaining the temperature of a storage battery.SOLUTION: The power supply device of the present invention includes: a box shaped body 2 having an opening 2a formed at one end thereof; a lid 4 provided in the body 2 so that the opening 2a can be opened and closed thereby; a battery 8 housed in the body 2 and capable of being charged and discharged; and an inverter device 5 capable of being housed in the body 2 and converting DC voltage from the battery 8 into AC voltage to output the AC voltage. The battery 8 comprises an in-vehicle lead acid battery, and a thermistor 88 for detecting the temperature of an electrode terminal 81 is provided at the terminal 81 of the lead acid battery.

Description

  The present invention relates to a power supply device and a temperature detection device.

  Demand for emergency power supplies is increasing in preparation for power outages due to earthquakes and disasters.

JP 2009-278832 A

  In particular, there is a demand for a large-capacity emergency power supply that can be used for a long time. An emergency power source for outputting an AC voltage of 100 V includes various devices such as an inverter device in addition to a storage battery.

  The storage battery mounted on the power supply device does not increase in temperature greatly even when used for a long time. On the other hand, if it is used in an excessive temperature environment, it leads to rapid performance deterioration of the storage battery. Therefore, it is necessary to monitor the temperature of the storage battery. Moreover, the performance deterioration of a storage battery will also progress when abnormal heat_generation | fever occurs by failure etc. of a storage battery.

  Accordingly, an object of the present invention is to provide a power supply device and a temperature detection device that can accurately grasp the temperature of the storage battery.

  In order to achieve the above object, the present invention comprises a box-shaped main body having an opening at one end, a lid provided on the main body so that the opening can be opened and closed, and a container housed in the main body. A battery capable of being discharged, and an inverter device that can be accommodated in the main body and converts a DC voltage from the battery into an AC voltage and outputs the alternating voltage, and the battery is composed of an in-vehicle lead acid battery. The electrode terminal is provided with a power supply device provided with temperature detecting means for detecting the temperature of the electrode terminal.

  The battery consists of a lead-acid battery for in-vehicle use, and the electrode terminal of the lead-acid battery is provided with temperature detection means for detecting the temperature of the electrode terminal, so the temperature change of the lead-acid battery is detected outside the lead-acid battery. It can be accurately grasped by means.

  Here, it is preferable that the temperature detecting means is a thermistor, and the thermistor is fixed to a metal crimp terminal fixed to the electrode terminal.

  The temperature detection means consists of a thermistor, and the thermistor is fixed to a metal crimp terminal that is fixed to the electrode terminal. Therefore, heat is easily transferred from the electrode terminal to the thermistor by the crimp terminal having high thermal conductivity. It is possible to grasp the temperature change of the lead storage battery. Further, the thermistor can be easily fixed to the electrode terminal with a simple configuration.

  The temperature detecting means is preferably fixed to the electrode terminal of the anode of the lead storage battery. Since the temperature detecting means is fixed to the electrode terminal of the anode of the lead storage battery, the temperature change of the lead storage battery can be grasped more accurately.

  Moreover, it is preferable that a thermal protector is fixed to the electrode terminal of the cathode of the lead storage battery. Since a thermal protector is fixed to the electrode terminal of the cathode of the lead storage battery, battery abnormality can be detected.

  Moreover, it is preferable that an adapter is connected to the electrode terminal of the lead storage battery, and the thermal protector is disposed between the lead storage battery and the output terminal of the adapter. Since the thermal protector is disposed between the lead storage battery and the output terminal of the adapter, charging and discharging can be stopped when the battery is abnormal.

  The thermal protector is preferably fixed to a copper holder fixed to the electrode terminal. Since the thermal protector is fixed to a copper holder fixed to the electrode terminal, the thermal protector can be made difficult to come off from the electrode terminal of the cathode even when vibration is applied.

  Moreover, it is preferable to provide the temperature detection means for detecting the temperature of this electrode terminal provided in the electrode terminal of this lead acid battery. Since the temperature detection means for detecting the temperature of the electrode terminal is provided at the electrode terminal of the lead storage battery, the temperature change of the lead storage battery can be accurately grasped by the temperature detection means outside the lead storage battery.

  ADVANTAGE OF THE INVENTION According to this invention, the power supply device which can grasp | ascertain the temperature of a storage battery correctly can be provided.

The front perspective view of the state where the inverter device of the power unit concerning the embodiment of the present invention was stored in the main body Sectional drawing which looked at the state by which the inverter apparatus of the power supply device which concerns on embodiment of this invention was accommodated in the main body from the front Sectional drawing which looked at the state by which the inverter apparatus of the power supply device which concerns on embodiment of this invention was accommodated in the main body from the side The rear view when the handle | steering-wheel of the power supply device which concerns on embodiment of this invention exists in a storage position The rear perspective view in the state where the inverter device of the power unit concerning the embodiment of the present invention was stored in the main body The top view of the state which removed the upper cover and inner cover of the power supply device which concern on embodiment of this invention The figure which shows the detailed position of the thermistor 88 of the power supply device which concerns on embodiment of this invention. The figure which shows the detailed position of the thermal protector of the power supply device which concerns on embodiment of this invention. The elements on larger scale of the battery of the power supply device which concerns on embodiment of this invention Sectional drawing along VII-VII of FIG. 4 of the handle | steering-wheel of the power supply device which concerns on embodiment of this invention The rear view when the handle of the power unit concerning an embodiment of the present invention exists in an extension position Sectional drawing which shows the state which the power supply device which concerns on embodiment of this invention fell to the rear side Sectional drawing which shows the state which the power supply device which concerns on embodiment of this invention fell to the rear side Sectional drawing which shows the state which the power supply device which concerns on embodiment of this invention fell to the front side Sectional drawing which shows the state which the power supply device which concerns on embodiment of this invention reversed in the front side The top perspective view of the upper lid of the power unit concerning an embodiment of the present invention The bottom perspective view of the upper lid of the power unit concerning an embodiment of the present invention. Sectional drawing which looked at the state by which the inverter apparatus of the power supply device which concerns on embodiment of this invention was fixed to the upper cover from the front Sectional drawing which looked at the state by which the inverter apparatus of the power supply device which concerns on embodiment of this invention was fixed to the upper cover from the side The top view of the upper cover of the power unit concerning the embodiment of the present invention The figure which showed only the cross section along XVI-XVI of FIG. 15 of the power supply device which concerns on embodiment of this invention. The perspective view of the inner cover of the power supply device which concerns on embodiment of this invention The top view of the inner cover of the power supply device which concerns on embodiment of this invention The figure which showed only the cross section along XIX-XIX of FIG. 18 of the power supply device which concerns on embodiment of this invention. The perspective view of the battery of the power supply device which concerns on embodiment of this invention The perspective view of the state which removed the upper cover and inner cover of the power supply device which concern on embodiment of this invention The fragmentary sectional view seen from the side of the power unit concerning the embodiment of the present invention The perspective view of the battery plate of the power supply device which concerns on embodiment of this invention The perspective view of the inverter apparatus of embodiment of this invention Sectional drawing which looked at the state by which the inverter apparatus of the power supply device which concerns on the 1st modification of embodiment of this invention was fixed to the upper cover, and the sine wave adapter was accommodated in the main body from the front Sectional drawing which looked at the state where the inverter apparatus of the power supply device which concerns on the 1st modification of embodiment of this invention was fixed to the upper cover, and the sine wave adapter was accommodated in the main body from the side The perspective view of the sine wave adapter of the power supply device which concerns on the 1st modification of embodiment of this invention. The circuit diagram of a battery adapter and an inverter apparatus. The figure explaining the change of the voltage waveform in embodiment of this invention. The circuit diagram of the sine wave adapter in embodiment of this invention. The graph figure which shows the time in the charge control in embodiment of this invention, the relationship between a battery voltage and an electric current. The table | surface which shows the relationship between the battery temperature in embodiment of this invention, a charging voltage, and charge completion time. A part of flowchart which shows charging / discharging control in embodiment of this invention. The remaining one part of the flowchart which shows the charge / discharge control in embodiment of this invention. The flowchart which shows the output control of the inverter apparatus in embodiment of this invention. The flowchart which shows the output control of the sine wave adapter in embodiment of this invention. The front view of the handle which concerns on the 2nd modification of embodiment of this invention The side view of the handle which concerns on the 2nd modification of embodiment of this invention The rear perspective view of the power unit concerning the 3rd modification of an embodiment of the present invention. The rear perspective view of the main body of the power unit concerning the 3rd modification of an embodiment of the present invention The side view of the main body of the power supply device which concerns on the 3rd modification of embodiment of this invention

  Hereinafter, the structure of the power supply device 1 which concerns on embodiment of this invention is demonstrated based on attached drawing.

  As shown in FIGS. 1 and 2, the power supply device 1 is mainly composed of a main body 2, a handle 3, an upper lid 4, an inverter device 5, an inner lid 6, an adapter 7, and a battery 8. Has been. As shown in FIG. 2, the direction in which the handle 3 extends from the main body 2 is defined as “up”, and the opposite is defined as “down”. Moreover, as shown in FIG. 3, the side where the handle 3 is provided with respect to the main body 2 is defined as the rear, and the opposite is defined as the front. The direction perpendicular to the vertical direction and the front-rear direction is defined as the left-right direction (FIG. 2).

  As shown in FIG. 21, an opening 2a is formed on the upper surface of the main body 2, and the upper lid 4 can open and close the opening 2a. In the main body 2, an inverter device 5, an inner lid 6, an adapter 7, and a battery 8 are accommodated. In FIG. 2 and FIG. 3, the inverter device 5 in which the adapter 7 is mounted on the upper lid 4 is depicted by a dotted line, which indicates that the inverter device 5 can be fixed on the upper lid 4. Yes. Similarly, in FIG. 13 and FIG. 14, the inverter device 5 is depicted by a dotted line on the inner lid 6 and the adapter 7 is depicted by a dotted line in the inner lid 6. This is because the inverter device 5 is depicted by the inner lid 6. The adapter 7 can be accommodated in the inner lid 6. The main body 2 corresponds to the main body of the present invention, the upper lid 4 corresponds to the lid of the present invention, and the battery 8 corresponds to the battery of the present invention.

  As shown in FIGS. 4 and 5, two wheels 21 are provided at both left and right ends of the rear surface of the lower end of the main body 2. On the side surface of the upper part of the main body 2 in the left-right direction, gripping portions 22 that are gripped when the operator lifts the power supply device 1 are provided symmetrically. The detailed configuration of the main body 2 will be described later.

  The handle 3 is provided on the rear surface of the main body 2, and is configured to be movable in the vertical direction between the storage position shown in FIG. 4 and the extended position shown in FIG. Both the handle 3 and the wheel 21 are provided on the back surface of the main body 2, and the operator can easily carry the power supply device 1 by extending the handle 3 to the extended position and tilting the power supply device 1 diagonally. Can do. The detailed configuration of the handle 3 will be described later.

  As shown in FIG. 2, a hinge 41 is provided at the right end of the upper lid 4, and the upper lid 4 is configured to be rotatable with respect to the main body 2 around the hinge 41. The upper lid 4 is fixed to the main body 2 by a latch 42 provided on the main body. The detailed configuration of the upper lid 4 will be described later.

  The inverter device 5 outputs a DC 12V input of the battery 8 as a rectangular wave AC 100V. By inserting a battery pack 5C (battery pack for electric tool, for example, 14.4V) indicated by a dotted line in FIG. 24 into the inverter device 5, the inverter device 5 is removed from the power supply device 1, and the inverter device 5 is used alone as a power source. It can also be used. However, the capacity (3.0 Ah) of the power tool battery pack 5 </ b> C is smaller than the capacity (38 Ah) of the battery 8. The adapter 7 is attached to the inverter device 5, one end of a power cable 56 (described later) is connected to the inverter device 5, and the other end of the power cable 56 is connected to a household 100 V power source, so that the inverter device 5 and the adapter 7 are connected. Thus, the battery 8 can be charged. The inverter device 5 also has a charging function. The detailed configuration of the inverter device will be described later.

  As shown in FIGS. 2 and 3, the inner lid 6 is disposed substantially at the center in the vertical direction of the main body 2 and is configured to accommodate the adapter 7. The inverter device 5 can be placed on the upper surface of the inner lid 6. The detailed configuration of the inner lid 6 will be described later.

  The adapter 7 includes an adapter cable 71 extending from the adapter 7, a connection portion 72 connected to the inverter device 5, and a cigar socket. The adapter 7 is electrically connected to the battery 8 via an adapter cable 71. By connecting the adapter 7 to an electric tool (not shown), the power supply device 1 can be used as a 12V DC power source. . Even if the battery 8 is 12V, if a booster circuit or a step-down circuit is provided in the adapter 7, it can be used for, for example, a power tool of 14, 4V or 10, 8V. Moreover, by attaching the adapter 7 to the inverter device 5 and obtaining an output from the inverter device 5, the power supply device 1 can be used as an AC power source of 100V for an electric tool or the like. The connection part 72 is composed of a terminal part 72A, a rail part 72B, and a latch part 72C.

  The battery 8 is disposed in the lower part of the main body 2 and plays a role as a power source for the power supply device 1. In the present embodiment, an in-vehicle lead storage battery is adopted as an example of the battery 8. The battery 8 includes a terminal 81 and is connected to the adapter 7 via the terminal 81 and the adapter cable 71. The detailed configuration of the battery 8 will be described later.

  Four protrusions 23 are provided on the lower surface of the main body 2, and as shown in FIG. 3, when the power supply device 1 is placed on the ground, the four protrusions 23 are in contact with the ground, and the wheel 21 is grounded. And separated. The main body 2 is configured by combining an outer body 24 that defines an outer shell and an inner body 25 that defines a space in the main body 2. The outer body 24 plays a role of absorbing an impact when the power supply device 1 falls. The main body 2 is provided with a cushioning material 2A. Specifically, it is provided between the outer body 24 and the inner body 25. In the present embodiment, the cushioning material 2A is a filler, and urethane is employed as an example. The outer body 24 and the inner body 25 are each made of blow-molded resin. In the present embodiment, considering the possibility of dilute sulfuric acid leaking from the battery 8, polyethylene is adopted for the inner body 25 and the outer body 24.

  Since the buffer material 2A is filled between the outer body 24 and the inner body 25, the battery 8 is hardly affected by the outside air temperature, and the battery 8 and the like can be protected from external impact. Even if the temperature of the battery 8 rises, heat can be released to the outside from the upper lid groove portion 47, the inner lid groove portion 63, and the like, which will be described later, so that the inside of the main body 2 is prevented from becoming high temperature. Can do. Further, even if hydrogen gas is generated from the battery 8, it can be released from the groove portion to the outside.

  The cushioning material 2 </ b> A may not be between the inner body 25 and the outer body 24. That is, as long as the battery 8 can be protected from external force, it may be attached between the inner body 25 and the battery 8 or attached to the inner body 25. Further, in the present embodiment, the inner body 25 and the outer body 24 are blow-molded, but two-layer molding may be used, and an elastomer may be provided as the buffer material 2A on the outer side of the inner body 25 or on the outer side of the outer body 24.

  A hook (not shown) is detachably provided on the outer body 24 so that the adapter 7 or the adapter cable 71 can be temporarily locked. The outer body 24 is further provided with a terminal housing portion (not shown) in a detachable manner, so that the terminal of the adapter 7 can be housed in the terminal housing portion. Thereby, the terminal of the adapter 7 can be prevented from being exposed to the outside.

  A holding portion 31 that holds the handle 3 is provided on the upper rear surface of the outer body 24. The holding part 31 is fixed to the main body 2 by a plurality of bolts or screws 32. A convex portion 24 </ b> A that can come into contact with the handle 3 is provided immediately below the holding portion 31.

  Inside the main body 2, an upper chamber 26, a middle chamber 27, and a lower chamber 28 are respectively defined from above. The upper chamber 26 includes the inverter device 5, and the middle chamber 27 includes the inner lid 6 and the adapter 7. The batteries 8 are disposed in the lower chambers 28, respectively.

  As shown in FIG. 3, the inner body 25 is formed with a plurality of recesses 25 a that are recessed toward the opposing outer body 24. Thereby, a wide space in the main body 2 can be secured, and the rigidity of the inner body 25 can be increased. Furthermore, since the amount of the buffer material 2A to be used can be reduced, the manufacturing cost can be reduced.

  On the lower surface of the inner body 25, a contact portion 25A where the outer body 24 and the inner body 25 are in contact is defined. In the contact portion 25A, the outer body 24 is recessed upward, and the inner body 25 is protruded downward, and they are in contact with each other. The contact portion 25A is a horizontal plane provided over the entire width in the left-right direction of the lower surface of the inner body 25 (FIG. 2) and over a predetermined distance in the front-rear direction (FIG. 3). The contact portion 25A is provided forward from the center in the front-rear direction.

  A drain hole 25b that penetrates the outer body 24 and the inner body 25 is formed at the right end of the contact portion 25A (FIG. 2). As shown in FIG. 3, an inclined portion 25B that is inclined downward by at least 1 ° toward the contact portion 25A is provided before and after the contact portion 25A. Thereby, the water that has fallen on the bottom surface of the main body 2 flows along the inclination of the inclined portion 25B, gathers at the contact portion 25A, and is discharged to the outside from the drain hole 25b.

  As shown in FIG. 3, a battery plate 82 described later is disposed on the lower surface of the inner body 25. In the lower part of the main body 2, a through hole 2 b that penetrates the outer body 24 and the inner body 25 and into which a battery shaft 83 described later is inserted is formed. A detailed configuration will be described later.

  As shown in FIGS. 6A and 21, the inner body 25 is provided with four ribs 25 </ b> C that protrude inward and hold the battery 8. The ribs 25 </ b> C extend in the vertical direction and are provided at the four corners of the cross section of the inner body 25 that forms a substantially rectangular shape of the lower chamber 28. Between the rib 25 </ b> C and the battery 8, an anti-slip member 25 </ b> D that prevents the battery 8 from sliding (displacement) with respect to the inner body 25 is provided. The anti-slip member 25 </ b> D also serves as a cushioning material between the battery 8 and the inner body 25. The inner lid 6 is placed on the four ribs 25C.

  As shown in FIG. 4, the handle 3 includes a substantially U-shaped handle gripping portion 33 gripped by an operator, a contacted portion 34 that contacts the holding portion 31 when the handle 3 is in the extended position, The extending portion 35 connecting the portion 33 and the contacted portion 34 and a reinforcing member 36 parallel to the contacted portion 34 are configured. As shown in FIG. 7, the handle 3 includes a first handle portion 37 having a substantially half-moon cross-sectional shape, and a second handle portion 38 having the same shape as the first handle portion 37. Specifically, the joint surface 37A defined by the substantially half-moon shaped straight line portion of the first handle portion 37 and the joint surface 38A defined by the substantially half-moon shaped straight portion of the second handle portion 38 are not shown. It is formed by fixing with a plurality of screws. As described above, the cross section of the handle 3 has a halved shape that is plane-symmetric with respect to the joint surfaces 37A and 38A. Thus, the strength of the handle 3 can be improved by inexpensive blow molding, but a hollow cylindrical handle may be used if there is no particular problem in strength. The first handle portion 37 and the second handle portion 38 are hollow.

  The abutted portion 34 extends in the horizontal direction, and is provided with a cushioning material 34A over the entire circumference (FIG. 4). The front side (main body 2 side) of the cushioning material 34A is always in contact with the outer body 24 at the storage position. Thereby, rattling of the handle 3 is prevented.

  In the present embodiment, a rubber damper is employed as an example of the cushioning material 34A. The extending portion 35 extends in the vertical direction and is supported by the holding portion 31 so as to be movable in the vertical direction. When the handle 3 is in the extended position (FIG. 8), the cushioning material 34 </ b> A is in contact with the holding portion 31. As shown in FIG. 9A, even when the power supply device 1 falls backward, the cushioning material 34A is grounded first, so that damage to other parts can be prevented. The reinforcing member 36 is a member for reinforcing the handle 3, and is provided so as to close the opening portion of the substantially U-shaped handle gripping portion 33. The cushioning material 34A corresponds to the elastic member of the present invention.

  As shown in FIG. 5, the holding portion 31 includes a handle holding portion 31 </ b> A that holds the handle 3 movably, a contact portion 31 </ b> B parallel to the contacted portion 34, and a first damper 31 </ b> C. . The handle holding part 31A is a metal press part, and is provided in two so as to sandwich the first damper 31C in the left-right direction, and is fixed to the main body 2 with a bolt 32. The contact portion 31B is provided with a second damper 31D that can contact the cushioning material 34A. The second damper 31D can further alleviate the impact of contact between the contacted portion 34 and the contact portion 31B. As shown in FIG. 8, the width W1 in the left-right direction of the contact portion 31B and the second damper 31D is larger than the width W2 in the left-right direction of the contacted portion 34 (more specifically, the distance between the extension portions 35). It is set to be smaller. Thereby, it can prevent that the connection location R of the to-be-contacted part 34 and the expansion | extension part 35 hits the contact part 31B, and is damaged. The second damper 31D corresponds to the elastic member of the present invention. The contact portion 31B also serves as a stopper that restricts the movement of the handle 3.

  As shown in FIG. 9B, the first damper 31 </ b> C is provided at a position farthest away from the main body 2. Even when the power supply device 1 falls backward, the first damper 31C is grounded next to the cushioning material 34A so as to alleviate the impact applied to the main body 2. Therefore, the first damper 31C Damage or the like can be prevented.

  When the handle 3 is in the storage position as shown in FIG. 3, the handle gripping portion 33 protrudes above the upper end of the upper lid 4 or the inverter device 5 (dotted line) fixed to the upper lid 4. The center of gravity G of the power supply device 1 is defined at the position shown in FIG. 3, and the center of gravity G and the handle gripping portion 33 of the handle 3 are separated by a distance L. This distance L is determined to such an extent that the state in which the power supply device 1 is inverted 180 ° cannot be stably maintained. In the present embodiment, since an in-vehicle lead acid battery is adopted as an example of the battery 8, depending on the state of the battery 8, dilute sulfuric acid in the electrolyte may leak from the inside. As shown in FIG. 10A, although the possibility that dilute sulfuric acid leaks from the battery 8 is low when the power supply device 1 falls 90 °, the dilute sulfuric acid may leak when the battery 8 is inverted 180 °. In the present embodiment, since the distance L is determined as described above, as shown in FIG. 10B, the handle 3 is obstructed, and the power supply device 1 cannot be maintained in the 180 ° inverted state. It becomes a state. Therefore, even if the power supply device 1 falls forward vigorously, the dilute sulfuric acid can be prevented from leaking from the battery 8. The handle gripping portion 33 corresponds to the most protruding portion of the present invention.

  The upper lid 4 has a substantially rectangular shape. As shown in FIGS. 11 and 12, the latch plate 43, a wall portion 44 provided on the periphery of the upper lid 4, and a latch engaging portion 45 that can be engaged with the latch 42. And a hinge attachment portion 46 to which the hinge 41 is attached. The upper lid 4 has an upper surface 4A, a flat portion 4B which is a peripheral edge of the upper lid 4 and is not provided with a wall portion 44, and a lower surface 4C. The upper lid 4 further includes an upper lid groove 47 having a substantially U-shaped cross section perpendicular to the vertical direction, a first depression 48 formed on the lower surface 4C, and a second depression adjacent to the first depression 48. 49 are formed. As shown in FIGS. 2 and 3, the upper lid 4 has a hollow interior for weight reduction. The latch plate 43 corresponds to the inverter device fixing portion of the present invention.

  As shown in FIGS. 13 and 14, the upper lid 4 can fix the inverter device 5. As shown in FIG. 11, the latch plate 43 is provided with two engaging portions 43 </ b> A that protrude upwardly at a predetermined distance in the left-right direction. The inverter device 5 is fixed to the upper lid 4 by engaging the engaging portion 43 </ b> A with the engaged portion of the detachable button 53 provided on the inverter device 5.

  The latch plate 43 is fixed to the upper lid 4 with a plurality of screws, and can be removed from the upper lid 4 by removing the screws. FIG. 15 shows a top view of the upper lid 4 with the latch plate 43 removed from the upper lid 4. FIG. 16 shows a cross-sectional view along XVI-XVI in FIG. The upper surface 4A and the flat portion 4B of the upper lid 4 are inclined at least 1 ° downward toward the rear. Thereby, rainwater does not accumulate around the engaging portion 43A, and rainwater can be discharged from a location where the wall portion 44 of the upper lid 4 described later does not exist (flat portion 4B).

  A peripheral edge portion 47A that is slightly higher than the upper surface 4A and the flat portion 4B is provided over the entire periphery of the upper lid groove portion 47. As shown in FIG. 2, the lower surface 4 </ b> C of the upper lid 4 presses the inverter device 5 accommodated in the main body 2 at least at a part other than the part where the first recess 48 and the second recess 49 are formed. doing. Thereby, the inverter device 5 is fixed in the main body 2.

  The wall portion 44 has a substantially U shape on the periphery of the upper lid 4 and is provided so that a substantially U-shaped opening is located on the rear side (handle side). Further, as shown in FIG. 11, on the rear side of the upper lid 4, there is a flat portion 4 </ b> B where the wall portion 44 is not provided in the peripheral portion between the wall portion 44 and the peripheral portion 47 </ b> A. Thereby, when an operator falls the power supply device 1 backward in order to carry the power supply device 1, the water accumulated in the upper lid 4 is actively discharged from the upper lid 4 through the flat portion 4 </ b> B. In addition, since the peripheral edge portion 47A is provided around the upper lid groove portion 47, water can be prevented from entering the main body 2 even if the power supply device 1 is tilted backward. As shown in FIGS. 5 and 11, the height of the wall portion 44 is set to be higher than the height of the engaging portion 43A. Thereby, even when a plate-shaped member falls from above, the member can be received on the upper surface of the wall portion 44, and therefore the engagement portion 43A can be prevented from being damaged. As shown in FIG. 14, the height of the wall 44 is set to be lower than the height of the inverter device 5. Thereby, it is possible to check whether the inverter device 5 is mounted and the state of the display panel 51 without being blocked by the wall portion 44 from the front.

  The latch engaging portion 45 is provided on the left side surface of the upper lid 4 (FIG. 11), and the upper lid 4 is fixed to the main body 2 by engaging with the latch 42. A hinge attachment portion 46 is provided on the right side surface of the upper lid 4 (FIG. 12), and the hinge 41 is attached to the hinge attachment portion 46.

  The upper lid groove portion 47 is formed on the rear surface of the upper lid 4, and the cable of the device accommodated in the main body 2 can be drawn out through the upper lid groove portion 47. As shown in FIG. 11, the upper lid groove 47 is formed on the rear surface of the upper lid 4, and the adapter 7 is attached to the rear side of the inverter device 5. By forming the upper cover groove portion 47 in the vicinity of the adapter 7 being mounted, the cable of the adapter 7 and the like can be easily pulled out of the main body 2 and the exposure of the wiring of the adapter 7 can be minimized. This makes it possible to collect wiring in a compact manner. When the inverter device 5 is fixed to the upper lid 4, the adapter cable 71 passes through the upper lid groove 47. Therefore, the cross-sectional area of the cross section perpendicular to the vertical direction of the upper lid groove portion 47 is set to be sufficiently larger than the cross-sectional area of the adapter cable 71. As shown in FIGS. 12 and 16, a curved surface portion 47 </ b> B is provided below the upper lid groove portion 47. The curvature of the curved surface portion 47B is set to be larger than the curvature of other portions (for example, the connection portion between the upper surface 4A and the wall portion 44). Thereby, the cable passing through the upper lid groove 47 is prevented from being caught by the upper lid groove 47.

  As shown in FIG. 2 and FIG. 3, the first recess 48 is recessed inside the upper lid 4 along the shape of a storage portion 54 of the inverter device 5 described later that protrudes upward. Thereby, the first recess 48 can be engaged with the accommodating portion 54. When comparing the inverter device 5 indicated by the dotted line in FIG. 14 with the inverter device 5 indicated by the solid line, the adapter device 7 is attached to the inverter device 5 indicated by the solid line. 7 protrudes. Even if the inverter device 5 is placed on the inner lid 6 with the adapter 7 attached to the inverter device 5 and the upper lid 4 is to be closed, the lower surface 4C around the first recess 48 comes into contact with the adapter 7 and closes the upper lid 4. I can't.

  The battery 8 has a configuration in which hydrogen gas is discharged from a valve disposed in the center when in use. In order to prevent this hydrogen gas from accumulating inside the main body 2, in this embodiment, a U-shaped upper lid groove portion 47 is provided on the rear surface of the upper lid 4 so that the hydrogen gas can be easily discharged to the outside. Yes. On the other hand, the control circuit of the adapter 7 is configured such that a fuse installed in the control circuit of the adapter 7 is blown when the terminal of the adapter 7 is mixed with foreign matter or a short circuit occurs due to a failure of the attached device. Since sparks are scattered when the fuse is blown, the inverter device 5 is arranged in the housing portion 54, the adapter 7 is connected to the inverter device 5 and the upper cover 4 is closed, and the operator However, when the product is used in a state where the upper lid groove portion 47 is closed, there is a concern that sparks may be scattered in the upper chamber 26 in a sealed state. For this reason, when the inverter apparatus 5 is arrange | positioned in the accommodating part 54 in the state which connected the adapter 7, it was set as the structure which the upper cover 4 does not close.

  In the present embodiment, in order to prevent the main body 2 from being filled with hydrogen gas, the inverter device 5 is disposed on the inner lid 6 and the adapter 7 or the battery pack 5C for the electric tool is attached to the inverter device 5. In this state, the upper lid 4 cannot be closed. As a result, even when the product is used in a state where the ventilation opening formed by the upper lid groove portion 47 is blocked, the inverter device 5 cannot be used in a state where the product is disposed in the accommodating portion 54, so that a problem due to hydrogen gas can be prevented. In addition, since the battery 8 and the inverter apparatus 5 are interrupted | blocked when a fuse blows, in that state, hydrogen gas is not generated. Hydrogen gas is generated mainly when the battery 8 is charged. Further, if the adapter 7 is left attached to the inverter device 5, the battery 8 is consumed by the circuit of the inverter device 5, but the battery 8 is wasted by not closing the upper lid 4 with the adapter 7 attached. Power consumption can be suppressed.

  The second recess 49 is formed so as to be adjacent to the first recess 48 and is provided to increase the rigidity of the upper lid 4.

  The inverter device 5 is accommodated in the main body 2 while being sandwiched between the upper lid 4 and the inner lid 6. As shown in FIG. 24, the inverter device 5 includes a display panel 51 that displays the state of the inverter device 5, an output cable 52, an attachment / detachment button 53, an adapter 7 or a battery pack 5C for an electric tool indicated by a dotted line. A housing portion 54 to be housed, a power input portion 55 that receives external input (FIG. 3), a power cable 56 that is detachably attached to the power input portion 55, and a band locking portion 57. Yes. In the inverter device 5, a side protrusion 5 </ b> A that protrudes laterally and can be engaged with the inner lid 6, and a front protrusion 5 </ b> B that protrudes forward and engageable with the inner lid 6 are defined. The connection part 72 of the adapter 7 to the inverter device 5 has the same shape as the battery pack 5C for electric tools. As a result, the inverter device 5 does not need to be provided with a connection portion corresponding to each of the adapter 7 and the battery pack 5C for the electric power tool, so that the size of the inverter device 5 is not increased.

  The display panel 51 is provided with an LED lamp. Depending on whether the LED lamp is lit or blinking, the operator uses the battery 8 as a power source, is charging the battery 8, or is connected to the power supply device 1. It is possible to determine whether an abnormality has occurred. From the output cable 52, the DC voltage input from the battery 8 or the DC voltage input from the power tool battery pack 5C through the adapter 7 is output as an AC voltage of 100V.

  The attachment / detachment buttons 53 are provided at both ends in the left-right direction, and the attachment / detachment to the upper lid 4 of the inverter device 5 can be performed by pressing the attachment / detachment buttons 53. The inverter device 5 is fixed to the upper lid 4 by engaging the engaging portion 43 </ b> A of the latch plate 43 and the engaged portion of the detachable button 53. The band locking portions 57 are provided at both ends of the front portion of the inverter device 5 in the left-right direction, and can lock a shoulder band (not shown). Thereby, the inverter device 5 can be used independently by taking out the inverter device 5 from the main body 2 and locking the shoulder band to the band locking portion 57. At this time, if the power tool battery pack 5C is used as the power source of the inverter device 5, the portability can be improved. Even when the battery 8 is desired to be used via the adapter 7, if the inverter device 5 is removed from the upper lid 4 and carried by a shoulder band, an electric tool such as a driver drill or a battery pack 5C for an electric tool is provided on the upper surface of the upper lid 4. Can be mounted, so the usage can be expanded.

  The inner lid 6 is disposed in the middle chamber 27 and divides the upper chamber 26 and the lower chamber 28. As shown in FIG. 17, the inner lid 6 has a peripheral wall 61, and a bottom surface 6A is defined. An adapter housing portion 62 for housing the adapter 7 is formed at the center of the inner lid 6, and an inner lid groove portion 63 is formed in the rear peripheral wall 61 (FIG. 18). As shown in FIGS. 2 and 3, the inner lid 6 has a hollow interior for weight reduction. In order to support the heavy battery 8 (15 kg), the main body 2 is filled with the cushioning material 2A between the outer body 24 and the inner body 25 to increase rigidity, but the adapter 7 is light in weight ( 1 kg), the adapter 7 can be supported even if the inside of the inner lid 6 is hollow.

  The bottom surface 6A is a horizontal surface, and two through holes 6a penetrating the bottom surface 6A in the vertical direction are formed. The two through holes 6a are located in the vicinity of the right peripheral wall 61 and in the vicinity of the left peripheral wall 61 with a predetermined distance therebetween. The upper chamber 26 and the lower chamber 28 communicate with each other through two through holes 6 a and an inner lid groove 63. The two through holes 6 a function as drain holes for draining water accumulated in the adapter housing portion 62, and also serve as vent holes for draining hydrogen gas generated from the battery 8. Thereby, it is possible to prevent water from being accumulated in the adapter housing portion 62 and to prevent the hydrogen gas generated from the battery 8 from filling the lower chamber 28.

  On the upper surface of the front, right, and left peripheral walls 61, a receiving portion 64 in which the peripheral wall 61 is recessed downward is provided, and the inverter device 5 can be placed on the receiving portion 64. The side protrusion 5A of the inverter device 5 is placed on the receiving portion 64 in the left-right direction, and the front protrusion 5B of the inverter device 5 is placed on the front receiving portion 64. Thereby, in a state where the inverter device 5 is placed on the inner lid 6, the inverter device 5 cannot move in the front-rear direction and the left-right direction on the inner lid 6. The rear peripheral wall 61 is provided with a cable receiving portion 65 that is recessed downward. The cable receiver 65 is provided to support the output cable 52 and the like extending from the back surface of the inverter device 5 when the inverter device 5 is placed. That is, the cable receiving portion 65 is provided on the peripheral wall 61 in the direction in which each cable extends when the inverter device 5 is placed on the inner lid 6.

  A first curved surface portion 66 is provided at a connection portion between the cable receiving portion 65 and the inner lid groove portion 63 provided on the rear peripheral wall 61. In the first curved surface portion 66, the curvature of the bottom surface of the cable receiving portion 65 and the side surface connecting the rear peripheral wall 61 and the inner lid groove portion 63 is set large. Thereby, when the adapter 7 is accommodated in the adapter accommodating portion 62, the adapter cable 71 can be prevented from being caught on the peripheral wall 61.

  The adapter storage portion 62 is provided at a substantially central portion of the inner lid 6 when viewed from above (FIG. 18), and is positioned below the receiving portion 64 (FIG. 17). The adapter storage unit 62 has a volume capable of storing a part of the adapter 7 and the adapter cable 71. Thereby, the adapter 7 can be accommodated in the adapter accommodating part 62 in the state which mounted the inverter apparatus 5 on the inner cover 6 (FIG. 2). Further, when the adapter 7 is not accommodated in the adapter accommodating part 62 because the adapter 7 is attached to the inverter device 5 or the like, the battery pack 5C for an electric tool or the like having a size that can be accommodated in the accommodating part 62 May be accommodated. Thereby, when the power supply device 1 is transported, devices other than the power supply device 1 can be transported together, so that the transportability can be improved.

  As shown in FIG. 18, the inner lid groove portion 63 has a substantially U shape in plan view, and the adapter cable 71 accommodated in the adapter accommodation portion 62 can be pulled out through the inner lid groove portion 63. As shown in FIG. 18, the inner lid groove 63 is formed in the rear peripheral wall 61. As shown in FIG. 3, the battery 8 is also disposed in the lower chamber 28 so that the terminal 81 is on the rear side. By forming the inner lid groove 63 on the same side as the side where the terminal 81 is disposed, when the adapter 7 is accommodated in the adapter accommodating portion 62, the amount of the adapter cable 71 routed can be minimized.

  As shown in FIG. 19, a second curved surface portion 63A is provided at the periphery of the inner lid groove portion 63 at a portion connecting the bottom surface 6A and the inner lid groove portion 63, and a third curved surface portion 63B is provided immediately below the second curved surface portion 63A. It has been. The curvatures of the second curved surface portion 63A and the third curved surface portion 63B are the same, and are set larger than the curvatures of the other portions (for example, the peripheral wall 61 and the bottom surface 6A). The curvatures of the second curved surface portion 63A and the third curved surface portion 63B are set to be larger than the curvature of the curved surface portion 47B. This is because the inner cover 6 is located immediately above the battery 8, so that the adapter cable 71 is more likely to be caught in the inner cover groove 63.

  As shown in FIG. 3, the holding portion 31 is located behind and directly above the inner lid 6. In the holding part 31, the distance between the outer body 24 and the inner body 25 is close to reinforce the fixation of the handle holding part 31A to the main body 2. Thereby, the cable housing space 6 b is defined by the inner body 25, the upper lid 4, the inverter device 5, and the inner lid 6. More specifically, the cable housing space 6 b is defined at a position facing the inverter device 5 in a state where the inverter device 5 is placed on the inner lid 6. In the cable storage space 6b, an output cable 52 and an adapter cable 71 extending from the back surface of the inverter device 5 when the inverter device 5 is placed on the inner lid 6 are stored. Thereby, since it is not necessary to project the outer body 24 etc. in order to form the space which accommodates a cable, it can suppress that the power supply device 1 enlarges.

  As shown in FIGS. 20 to 22, the battery 8 includes a substantially plate-shaped battery plate 82 mounted on the main body 2, a battery shaft 83 extending upward from both left and right ends of the battery plate 82, and a butterfly. It is fixed to the main body 2 by a support plate 85 fixed to the battery shaft 83 by a bolt 84 and a bolt 86 screwed to one end of the battery shaft 83. An anti-slip member 82B is provided between the battery plate 82 and the battery 8 (FIG. 22). In the present embodiment, a rubber damper is employed as an example of the anti-slip member 82B. The battery plate 82 is made of metal, and as shown in FIG. 23, two restriction portions 82A are provided by folding the end portions in the front-rear direction upward. The distance D1 between the two restricting portions 82A is set slightly larger than the distance D2 (FIG. 22) in the front-rear direction of the battery 8. Thereby, the movement of the battery 8 in the front-rear direction is restricted. A shaft through hole 82a through which the battery shaft 83 is inserted is formed at a position closer to the front than the center in the front-rear direction of the battery plate 82. Two shaft through holes 82a are formed at a predetermined distance in the left-right direction. The battery shaft 83 passes through the shaft through hole 82 a and the through hole 2 b formed in the main body 2 and is fixed to the main body 2 by the bolt 86. The battery 8 can be easily positioned when placed on the battery plate 82 by the restricting portion 82A of the battery plate 82 and the battery shaft 83.

  As shown in FIG. 3, the battery 8 is supported by the battery shaft 83 at a position closer to the front than the center of the lower chamber 28 in the front-rear direction. When the outer body 24 and the inner body 25 are blow-molded, it is necessary to form a recess that accommodates the wheel 21, but when the recess and the contact portion 25A are brought close to each other due to molding problems, There was a problem that could not be held. On the other hand, when a valve for releasing hydrogen gas is arranged at the center of the battery 8 and the installation position of the battery plate 82 is set at the center of the battery 8, there is a problem that the battery plate 82 blocks the valve. In order to avoid these, the size of the main body 2 may be simply increased. However, as in the present embodiment, the distance between the recess for housing the wheel 21 and the contact portion 25A can be sufficiently maintained. By supporting the battery 8 from the center in the front-rear direction toward the front by the battery shaft 83, the main body 2 can be made compact and the cost can be reduced.

  As shown in FIG. 2, the battery 8 is fixed to the left side of the main body 2 of the lower chamber 28 from the center in the left-right direction. Since the upper lid 4 rotates about the hinge 41 as a fulcrum, when the upper lid 4 is opened, the center of gravity of the power supply device 1 is shifted to the right. Even when the upper lid 4 is opened, the battery 8 is fixed to the left from the center in order to keep the balance of the center of gravity of the power supply device 1 at a position close to the center in the left-right direction. As a result, a space is created on the right side of the battery 8, and a drain hole 25b is formed in the contact portion 25A of the space.

  As shown in FIG. 2, the movement of the battery 8 in the left-right direction is restricted by a battery shaft 83 that extends upward from both ends in the left-right direction. As shown in FIG. 22, an elastic material 87 for protecting the surface of the battery 8 and preventing the battery 8 from slipping is provided between the support plate 85 and the battery 8. When the support plate 85 and the elastic material 87 are pressed against the battery 8 by the butterfly bolt 84, the battery 8 is restricted from moving in the vertical direction. Thereby, the battery 8 is completely fixed to the main body 2. The support plate 85 is provided with an insulator 85A over the distance D3 in the width direction (FIG. 20). As shown in FIG. 6A, the distance D3 is set longer than the distance D4 between the terminals 81. Thereby, when exchanging the battery 8, it can suppress that the support plate 85 contacts the terminal of the battery 8, and short-circuits.

  As shown in FIG. 6B, a cable 71A extends from the adapter cable 71 to each terminal 81, and a crimp terminal 71B is provided at the tip of the cable 71A. The crimp terminal 71B includes a terminal engaging portion 71C that engages with the terminal 81, and a cable receiving portion 71D into which the cable 71A is inserted. By connecting the terminal engaging portion 71 </ b> C and the terminal 81, the adapter 7 and the battery 8 are electrically connected. In the state shown in FIG. 6A, the terminal 81 is positive on the right side and negative on the left side. Since the terminal engaging portion 71 </ b> C is fixed to the plus terminal 81 by the bolt, it is possible to reliably prevent the thermistor 88 from being detached from the battery 8 due to vibrations or the like generated during transportation of the power supply device 1.

  A thermistor 88 as temperature detecting means is provided on the crimp terminal 71B in the vicinity where the plus terminal 81 and the cable 71A are engaged. As shown in FIG. 6B, in the state where the thermistor 88 is fixed to the tip of the thermistor cable 88A, the thermistor 88 and the cable 88A are inserted into the cable receiving portion 71D, and the relevant part is crimped and fixed. At this time, epoxy is applied to the inner peripheral surface of the cable receiving portion 71D, and the thermistor 88 is prevented from being damaged by pressure bonding. The thermistor cable 88A is connected to the adapter 7, and the adapter 7 can detect the temperature of the battery 8.

  As shown in FIG. 6D, two thermal protectors 89 are fixed to the negative terminal 81 by bolts. The cable of the thermal protector is connected to the adapter 7 so that a battery abnormality can be detected. The two thermal protectors 89 are held by a copper holder 90 and are fixed to the copper holder 90 by silicon 89A. The copper holder 90 is fixed to the negative terminal 81 of the battery 7 with a bolt. One thermal protector 89 is disposed in the output path of the battery 8 and the cigar socket provided in the adapter 7 and capable of outputting DC 12V. The other thermal protector 89 is arranged in the charging path of the battery 8 and the power supply path to the inverter device 5.

  The thermal protector 89 is opened when the battery temperature becomes high (for example, 65 ° C. or higher) due to battery abnormality or the like, and the above-described path is blocked. Thereby, charging / discharging can be stopped at the time of battery abnormality.

  Usually, the temperature of a storage battery does not increase so much even if it is used continuously for a long time. However, when used in a high temperature or low temperature environment, battery performance degradation or battery failure may occur. For this reason, in this invention, it is set as the structure which provided the use condition regarding temperature. As a temperature control configuration, a thermistor 88 is provided for temperature control of power supply to the inverter device 5 side, and two thermal protectors are provided for output control to the cigar socket plug and temperature protection during charging.

  For the purpose of improving the accuracy of temperature control, one thermistor 88 is directly attached to the plus terminal of the battery 8 and two thermal protectors are directly attached to the minus terminal 81. As for the thermal protector, both of the two thermal protectors are directly attached to the negative terminal 81, and the two thermal protectors are directly bonded to the copper holder with silicon so that the temperature can be accurately read. It is fixed with nuts (bolts). As a result, it is possible to prevent the thermal protector or thermistor 88 from dropping off or being disconnected due to vibration or the like generated during transportation, and the accuracy of temperature control can be improved.

  As shown in FIG. 6, after the end of the adapter cable 71 is fixed to the terminal 81, it is fixed to the support plate 85 by a binding band. As a result, a load is applied to a portion where the adapter cable 71 is connected to the terminal 81 to prevent the portion from being damaged or cut.

  On the upper surface of the battery 8, a plurality of gas vent holes 8 a for extracting the hydrogen gas from the battery 8 are formed. The support plate 85 is provided at a position shifted from the gas vent hole 8a. The circuit configuration and electrical action of the battery 8, the adapter 7, and the inverter device 5 will be described in detail in a first modification described later.

  A first modification of the present embodiment is shown in FIGS. In the first modification of the present embodiment, a sine wave adapter 9 is placed on the inner lid 6, and the inverter device 5 is fixed to the upper lid 4.

  The sine wave adapter 9 is a device capable of converting a rectangular wave AC voltage output from the inverter device 5 into a sine wave AC voltage. By connecting the output cable 52 of the inverter device 5 to the sine wave adapter 9 and obtaining an output from the sine wave adapter 9, the power supply device 1 can be used as a 100V sine wave AC power source.

  As shown in FIG. 27, the sine wave adapter 9 includes an engagement portion 91 that can be engaged with the inverter device 5, a display portion 92 that displays a setting state of the sine wave adapter 9, and an output frequency of the sine wave adapter 9. A setting unit 93 for setting, an output cable 90A, and an input unit 90B (FIG. 26) for receiving external input are provided. The sine wave adapter 9 is defined with a side protrusion 9 </ b> A that protrudes laterally and engageable with the inner lid 6, and a front protrusion 9 </ b> B that protrudes forward and engages with the inner lid 6. The engaging portion 91 has substantially the same shape as the engaging portion 43A provided on the latch plate 43, and protrudes upward. The operator can attach and detach the inverter device 5 to and from the sine wave adapter 9 by operating the attach / detach button 53 provided on the inverter device 5. As a result, the inverter device 5 and the sine wave adapter 9 can be carried and the usage can be expanded.

  The display unit 92 is provided with two LED lamps. When the setting unit 93 is set to 50 Hz, one LED lamp is lit, and when the setting unit 93 is set to 60 Hz, the other LED lamp is lit. The LED lamp lights up. An insertion plug 90AA is provided at the tip of the output cable 90A. The output from the inverter device 5 is input to the input unit 90B.

  The cable housing space 6b accommodates an output cable 90A extending from the back surface of the sine wave adapter 9 when the sine wave adapter 9 is placed on the inner lid 6. The side protrusion 9A of the sine wave adapter 9 is placed on the receiving part 64 in the left-right direction, and the front protrusion 9B of the sine wave adapter 9 is placed on the front receiving part 64. Thereby, in a state where the sine wave adapter 9 is placed on the inner lid 6, the sine wave adapter 9 cannot move in the front-rear direction and the left-right direction on the inner lid 6.

  In the state shown in FIG. 25, when the sine wave adapter 9 is placed on the inner lid 6 at the maximum in the upper lid groove portion 47, the adapter cable 71 and the inverter device 5 are connected to the sine wave adapter 9. There is a possibility that three cables of the output cable 52 and the output cable 90A output from the sine wave adapter 9 pass. The cross section perpendicular to the vertical direction of the upper lid groove portion 47 has a cross sectional area that allows the three cables to pass therethrough.

  Next, circuit configurations of the battery 8, the adapter 7, the inverter device 5, and the sine wave adapter 9 will be described.

  The adapter 7 includes a positive terminal 1071A, a negative terminal 1071B, terminals 1072A to 1072G, a microcomputer 1710, a constant voltage circuit 1720, a charging current detection circuit 1730, a low consumption circuit 1740, and a power supply voltage detection circuit 1750. And an output stop circuit 1760, a charge circuit 1770, a charge timer reset circuit 1781, an identification resistor 1785, a remaining amount display circuit 1784, a discharge stop circuit 1786, and a thermistor 1707 (= thermistor 88) of the battery 8. Temperature detector 1707A.

  The plus side terminal 1071A and the minus side terminal 1071B are connected to the plus side terminal 1081A and the minus side terminal 1081B of the battery 8, respectively, and input a DC voltage from the battery 8. The positive side terminal 1071A and the negative side terminal 1071B on the input side are connected to the positive side terminal 1072B and the negative side terminal 1072C on the output side, respectively, and the DC voltage input from the battery 8 is connected to the inverter device from the terminals 1072B and 1072C. Output to 5. The minus side terminal 1072C is connected to the minus side terminal 1081B of the battery 8.

  The power supply voltage detection circuit 1750 has resistors 1751 and 1752. Resistors 1751 and 1752 are connected in series between the positive terminal 1071A and the negative terminal 1072C on the output side, and output a voltage divided by the resistors 1751 and 1752 to the microcomputer 1710.

  The low power consumption circuit 1740 includes FETs 1741 and 1743, resistors 1742, 1744, 1747 and 1748, a diode 1746, and a capacitor 1745. The low power consumption circuit 1740 is connected between the positive terminal 1071 </ b> A and the constant voltage circuit 1720. Specifically, the source of the FET 1741 and the terminal 1071A are connected, and the drain of the FET 1741 and the constant voltage circuit 1720 are connected. When the voltage from the inverter device 5 is applied to the low power consumption circuit 1740 via the terminal 1072D, the FET 1743 is turned on and the FET 1741 is also turned on. For this reason, the output voltage from the battery 8 is applied to the constant voltage circuit 1720. On the other hand, when no voltage is applied from the inverter device 5 to the low power consumption circuit 1740, the FET 1743 is off, and thus the FET 1741 is also off. Therefore, the output voltage from the battery 8 is not applied to the constant voltage circuit 1720. Accordingly, the microcomputer 1710 is not driven. Thus, when the inverter device 5 is not operating, the battery 8 does not supply power to the adapter 7, thereby preventing the battery 8 from consuming unnecessary power.

  The constant voltage circuit 1720 includes a three-terminal regulator 1723 and an oscillation preventing capacitor 1722, converts the voltage from the battery 8 into a predetermined voltage (for example, 5V), and supplies driving power for the microcomputer 1710 and the like.

  The charging current detection circuit 1730 includes resistors 1731 to 1735, an operational amplifier 1736, and a capacitor 1737. The resistor 1731 is connected between the input side terminal 1071B and the output side terminal 1072C. The charging current detection circuit 1730 amplifies the current flowing through the resistor 1731 by the operational amplifier 1736 and inputs it to the microcomputer 1710. Thereby, the microcomputer 1710 can measure the current flowing through the resistor 1731.

  The charge timer reset circuit 1781 includes a resistor 1782 and a transistor 1783. The collector of the transistor 1783 is connected to the inverter device 5 (terminal 1052E) through the identification resistor 1785 and the terminal 1072E. The emitter of the transistor 1783 is connected to the negative terminal 1072C. When the microcomputer 1710 sends a high level signal, the transistor 1783 is turned on, and a reset signal is output to the inverter device 5. The microcomputer 1710 transmits an identification signal to the inverter device 5 via the charging timer reset circuit 1781, the identification resistor 1785, and the terminal 1072E. The identification resistor 1785 corresponds to the battery 8. The inverter device 5 can determine electrical characteristics such as a voltage value of the battery 8 based on the identification signal. The resistance value of the identification resistor 1785 is set to a value different from that of the power tool battery pack 2C. That is, since the identification resistor 1785 and the identification resistor are different, the identification signal of the adapter 7 output via the identification resistor 1785 and the identification signal of the battery pack 5C output via the identification resistor are different from each other. Therefore, the inverter device 5 can determine whether the adapter 7 is connected or the battery pack 5C is connected based on the identification signal.

  The discharge stop circuit 1786 includes a resistor 1787, a transistor 1788, and a resistor 1789. The collector of the transistor 1788 is connected to the inverter device 5 through the resistor 1789 and the terminal 1072G. The emitter of the transistor 1788 is connected to the negative terminal 1072C. When the microcomputer 1710 determines that the output voltage of the battery 8 has fallen below a predetermined level based on the output of the power supply voltage detection circuit 1750, a high level signal is sent to the discharge stop circuit 1786. Then, the transistor 1788 is turned on, and a discharge stop signal (LD signal) is output to the inverter device 5. On the other hand, when the microcomputer 1710 determines that the output voltage of the battery 8 is not lower than the predetermined level, that is, there is no problem in continuing the discharge, the microcomputer 1710 sends a low level signal to the discharge stop circuit 1786. . Then, the transistor 1788 is turned off and no discharge stop signal is output. Note that a signal output from the microcomputer 1710 to the discharge stop circuit 1786 is also output to an output stop circuit 1760, which will be described later. When the discharge stop signal is output from the discharge stop circuit 1786, the output stop circuit 1760 The socket plug 1073 is disconnected and the voltage output from the cigar socket plug 1073 is stopped.

  The microcomputer 1710 is connected to the terminal 1072F, and outputs a charge stop signal (LE signal) to the inverter device 5 through the terminal 1072F.

  The remaining amount display circuit 1784 includes a resistor 1795 and an LED 1074, and lights the LED 1074 according to the remaining amount of the battery (the voltage value detected by the power supply voltage detection circuit 1750). In the present embodiment, the microcomputer 1701 causes the LED 1074 to be continuously lit when it is determined that the voltage value detected by the power supply voltage detection circuit 1750 is 70% or more of the maximum voltage of the battery 8. When the voltage value is determined to be 30% or more and less than 70% of the maximum voltage of the battery 8, the LED 1074 is blinked. When it is determined that the voltage value is less than 30% of the maximum voltage of the battery 8, the LED 1074 blinks at an earlier interval than when the voltage value is 30% or more and less than 70%. Therefore, the user can recognize the remaining battery level of the battery 8 by the LED 1074.

  The cigar socket plug 1073 has terminals 1073A and 1073B. The plus side terminal 1073A is connected to the plus side terminal 1081A of the battery 8 via the terminal 1071A and the output stop circuit 1760. The other terminal 1073B of the cigar socket plug 1073 is connected to the negative terminal 1081B of the battery 8. The output of the battery 8 can be output simultaneously from both the cigar socket terminals 1073A and 1073B and the terminals 1072B and 1072C. In other words, DC 12V can be output from the cigar socket terminal 1073, and a rectangular wave 100V can be output from the inverter device 5. If a sine wave adapter 9 described later is connected, DC 12V and sine wave AC 100V can be output simultaneously.

  The output stop circuit 1760 is provided between the positive terminal 1071A of the battery 8 and the terminal 1073A of the cigar socket plug 1073. The output stop circuit 1760 includes an FET 1761, resistors 1762, 1763, 1765-367, 1769, 1792, transistors 1764, 1791, and a Zener diode 1768. The base of the transistor 1791 is connected to the microcomputer 1710. The source of the FET 1761 is connected to the terminal 1071A, and the drain is connected to the terminal 1073A. When a high level signal is applied from the microcomputer 1710 to the base of the transistor 1791, the transistor 1791 is turned on and the transistor 1764 is turned off. Therefore, the FET 1761 is turned off and the terminals 1071A and 1073A are cut off. On the other hand, when a low level signal is applied from the microcomputer 1710 to the base of the transistor 1791, the transistor 1792 is turned off, and a current flows through the path of the Zener diode 1768 and the resistors 1767, 1766, 1765, so that the transistor 1764 is turned on. As a result, the FET 1761 is turned on, the terminals 1071A and 1073A are connected, and the output voltage of the battery 8 can be taken out from the terminals 1073A and 1073B of the cigar socket plug. By providing the cigar socket plug 1073 in this way, the DC voltage of the battery 8 can be output from the cigar socket plug 1073 as it is. Thereby, the electronic device which has a cigar socket can be inserted in the adapter 7, and can be used. Further, when the voltage of the battery 8 decreases, the output stop circuit 1760 can stop the discharge of the battery 8 and prevent overdischarge. If the voltage of the battery 8 is equal to or higher than a predetermined value, the transistor 1764 is turned on via the Zener diode 1768 and the resistors 1767 and 1766, so that the FET 1761 is turned on and power is supplied to the cigar socket plug 1073.

  The charging circuit 1770 includes an FET 1771, resistors 1772, 1773, 1775, and a transistor 1774. The base of the transistor 1774 is connected to the output terminal of the microcomputer 1710 via the resistor 1775. The drain of the FET 1771 is connected to the positive terminal 1071A and the constant voltage circuit 1720 of the battery 8, and the source is connected to the output terminal 1072A of the adapter 7. The battery 8 is charged by the voltage applied from the inverter device 5 to the terminals 1072A and 1072B. When charging the battery 8, the microcomputer 1710 outputs a high level signal to the base of the transistor 1774 to turn on the transistor 1774. When the transistor 1774 is turned on, the FET 1771 is also turned on, a charging path is formed, and the battery 8 is charged. On the other hand, when the microcomputer 1710 applies a low level signal to the base of the transistor 1774, the FET 1771 is turned off, the charging path is cut off, and charging of the battery 8 is stopped.

  A thermistor 1707 is installed (fixed with a bolt) in the vicinity of the battery 8 (plus side terminal 1081A). Since it is fixed to the terminal by a fixing tool (bolt), the battery temperature can be detected efficiently, and it is difficult to come off due to an external force due to vibration or the like. The microcomputer 1710 measures the temperature of the battery 8 using the thermistor 1707 and the temperature detection unit 1707A. The constant voltage circuit 1720 supplies power to the temperature detection unit 1707A.

  Two thermal protectors 1708A and 1708B (= thermal protector 89) are installed (fixed with bolts) in the vicinity of the battery 8 (negative terminal 1081B). The two thermal protectors 1708A and 1708B are held by a copper holder 1709, and are fixed to the copper holder 1709 by silicon. The copper holder 1709 is fixed to the negative terminal 1081B of the battery 8 with a bolt. The thermal protector 1708 </ b> A is arranged on the output path of the cigar socket 1073 (terminals 1073 </ b> A and 1073 </ b> B) and the lead charging place 8. The thermal protector 1708B is arranged on the charging path of the battery 8 and the power supply path (switch 1525) to the inverter device 5. Although the thermal protectors 1708A and 1708B are defined as separate members from the adapter 7 and the battery 8, they may be part of the adapter 7 or part of the battery 8.

  The thermal protectors 1708A and 1708B are opened when the battery temperature becomes high (eg, 65 ° C. or higher) due to battery abnormality or the like, and the above-described path is blocked. Thereby, charging / discharging can be stopped at the time of battery abnormality.

  When the thermal protector 1708A is in the open state, no signal is input to the gate of the transistor 1764, so the FET 1761 is turned off and the output to the cigar socket plug 1073 is shut off.

  When the thermal protector 1708B is opened, the charging path between the charging unit 5B and the battery 8 is interrupted. Furthermore, since the power supply to the constant voltage circuit 1521 is cut off via the switch 1525 (described later) of the inverter device 5, the control unit 1501 (described later) cannot be driven, and the operation of the inverter device 5 is stopped.

  Usually, the temperature of a storage battery does not increase so much even if it is used continuously for a long time. However, when used in a high temperature or low temperature environment, battery performance degradation or battery failure may occur. For this reason, in this invention, it is set as the structure which provided the use condition regarding temperature. As a temperature control configuration, a thermistor 1707 is provided for controlling the temperature of power supply to the inverter device 5 side, and in order to control the output to the cigar socket plug 1073 and protect the temperature during charging, Thermal protectors 1708A and 1708B are provided.

  The inverter device 5 is supplied with a DC voltage from the battery 8 via the adapter 7 (FIG. 29 (a)). The inverter device 5 boosts the DC voltage (FIG. 29 (b)) and then generates a rectangular wave. It converts into a voltage and outputs it (FIG.29 (c)). First, the sine wave adapter 9 rectifies the rectangular wave voltage into a DC voltage (FIG. 29D) and transforms the DC voltage (FIG. 29E). Then, after converting the transformed DC voltage into a pulse wave voltage (FIG. 29 (f)), the rectangular wave voltage is converted into a sine wave voltage (FIG. 29 (g)). The sine wave voltage can be output to a precision instrument or the like via terminals 1098A, 1098B (commercial power outlets).

  As shown in FIG. 28, the inverter device 5 includes a discharging unit 5A and a charging unit 5B. The discharge unit 5A includes a battery voltage detection unit 1510, a switch 1525, a constant voltage circuit 1521, a boost circuit 1540, a rectification / smoothing circuit 1550, a boost voltage detection unit 1560, an inverter circuit 1570, and a current detection resistor 1517. A PWM signal output unit 1511 and a control unit 1501. The discharge unit 5A converts the DC voltage input to the terminals 1052B and 1052C into a rectangular-wave AC voltage and outputs the AC voltage to the terminals 1057A and 1057B.

  The battery voltage detection unit 1510 includes battery voltage detection resistors 1511 and 1512. The battery voltage detection resistors 1511 and 1512 are connected in series between the positive terminal 1052B and the negative terminal 1052C, and the battery connected to the terminal 1052 (in the example of FIG. 28, the battery connected to the adapter 7). The voltage divided by the battery voltage detection resistor 1511 and the battery voltage detection resistor 1512 is output to the control unit 1501. In addition, it is also possible to connect the battery pack 5C for electric tools to the terminals 1072B and 1072C.

  The power switch 1525 and the constant voltage circuit 1521 are connected in series between the positive terminal 1052B and the control unit 1501. The constant voltage circuit 1521 includes a three-terminal regulator 1522 and oscillation prevention capacitors 1523 and 1524. When the power switch 1525 is turned on by the user, the voltage from the adapter 7 (battery 8) is changed to a predetermined direct current. It converts into voltage (for example, 5V), and supplies it to the control part 1501 as drive electric power. Note that when the power switch 1525 is turned off, the driving power is not supplied to the control unit 1501, and thus the entire inverter device 5 is turned off.

  The booster circuit 1540 includes a transformer 1541, an FET 1531, a resistor 1532, and a thermistor 1533, and the transformer 1541 includes a primary side winding 1541a and a secondary side winding 1541b.

  The primary side winding 1541a is connected between the plus side terminal 1052B and the minus side terminal 1052C, and an FET 1531 is further arranged between the primary side winding 1541a and the minus side terminal 1052C of the transformer 1541. ing. A first PWM signal for turning on / off the FET 1531 is input from the control unit 1501 to the gate of the FET 1531, and the DC power supplied from the adapter 7 (or the battery pack 5 </ b> C) by the on / off of the FET 1531 is alternating current. It is converted into electric power and output to the primary side winding 1541a of the transformer 1541. The AC power input to the primary side winding 1541a is transformed according to the turn ratio between the primary side winding 1541a and the secondary side winding 1541b and output from the secondary side winding 1541b. The thermistor 1533 detects the temperature of the FET 431, and when the control unit 1501 determines that the temperature of the FET 1531 is higher than a predetermined temperature, the FET 1531 is turned off by the first PWM signal, and the current supply to the transformer 1541 is cut off. To do. This is to prevent the circuit components, particularly the FET 1531, from being damaged by high temperatures.

  The rectifying / smoothing circuit 1550 includes rectifying diodes 1551 and 1552, and a smoothing capacitor 1553. With these, the AC power boosted by the transformer 1541 is rectified and smoothed and output as DC power.

  The boost voltage detection unit 1560 includes resistors 1561 and 1562 connected in series with each other, detects a DC boost voltage (smoothing capacitor voltage, for example, 141 V) output from the rectification / smoothing circuit 1550, and determines the boost voltage. The voltage divided by the resistors 1561 and 1562 is output to the controller 1501.

  The inverter circuit 1570 includes four FETs 1571-1574, and FETs 1571 and 1572 connected in series and FETs 1573 and 1574 connected in series are connected in parallel to the smoothing capacitor 1553. Specifically, the drain of the FET 1571 is connected to the cathodes of the rectifier diodes 1551 and 1552, and the source of the FET 1571 is connected to the drain of the FET 1572. The drain of the FET 1573 is connected to the cathodes of the rectifier diodes 1551 and 1552, and the source of the FET 1573 is connected to the drain of the FET 1574.

  Further, the source of the FET 1571, the drain of the FET 1572, the source of the FET 1573, and the drain of the FET 1574 are connected to the output terminals 1057A and 1057B, respectively, and the output terminals 1057A and 1057B can be connected to the sine wave adapters 1092A and 1092B. is there. A second PWM signal for turning on / off the FET 1571-1574 is input from the PWM signal output unit 1511 to the gate of the FET 1571-1574, and output from the rectification / smoothing circuit 1550 by turning on / off the FET 1571-1574. The DC voltage is converted into a rectangular waveform AC voltage (for example, AC 100 V) and output to the sine wave adapter 9.

  The current detection resistor 1517 is connected between the source of the FET 1572, the source of the FET 1574, and the negative side terminal 1052C, and the high voltage side terminal of the current detection resistor 1517 is connected to the control unit 1501. With such a configuration, the current detection resistor 1517 detects the current flowing through the inverter device 5 based on the voltage drop of the resistor, and outputs it as a voltage to the control unit 1501.

  The control unit 1501 outputs a first PWM signal to the gate of the FET 1531 based on the boosted voltage detected by the boosted voltage detection unit 1560 so that the boosted voltage becomes a target effective value (eg, 141 V). In addition, the control unit 1501 outputs a second PWM signal such that AC power having a target effective value (for example, AC 100 V) is output to the terminal 1057 to the gates of the FETs 1571 to 1574 via the PWM signal output unit 1511. . In the present embodiment, the control unit 1501 includes an FET 1571 and an FET 1574 (hereinafter referred to as a first set), an FET 1572 and an FET 1573 (hereinafter referred to as a second set) as one set, and the first set and the second set. A second PWM signal for alternately turning on and off the set of the signals is output. That is, the control unit 1501 controls the gate signal of the FET 1531 based on the feedback information of the boosted voltage detected by the boosted voltage detection unit 1560 so that the target boosted voltage is obtained.

  In addition, the control unit 1501 determines overdischarge of the battery 8 connected to the adapter 7 based on the battery voltage detected by the battery voltage detection unit 1510. Specifically, when the battery voltage detected by the battery voltage detection unit 1510 is smaller than a predetermined overdischarge voltage, it is determined that the battery 8 is overdischarged and the output to the inverter device 5 is stopped. For this purpose, a first PWM signal and a second PWM signal are output. That is, at least one of the first and second PWM signals is stopped. The control unit 1501 also outputs a first PWM signal and a second PWM signal for stopping output to the terminal 1057 even when a discharge stop signal (LD signal) is received from the signal terminal 1052G. That is, at least one of the first and second PWM signals is stopped.

  Further, the control unit 1501 determines overcurrent based on the current (voltage) detected by the current detection resistor 1517. Specifically, when the current detected by the current detection resistor 1517 exceeds the overcurrent threshold value of the FETs 1571-4715 of the inverter circuit 1570, the first PWM signal for stopping the on / off operation of the FET 1531 is output as the FET 1531. The second PWM signal for stopping the on / off operation of the FET 1571-1574 is output to the gate of the FET 1571-1574. As a result, the supply of power to the AC motor 1071 is stopped, so that it is possible to prevent the AC motor 1071 and the inverter circuit 1570 (particularly the FETs 1571 to 1574) from being damaged due to overcurrent. Note that the on / off operation of one of the FET 1531 and the FET 1571-1574 may be stopped.

  Charging unit 5B includes rectifier circuit 1581, smoothing capacitor 1582, FET driver IC 1583, step-down circuit 1590, rectification / smoothing circuit 1585, feedback control unit 1588, switch 1589, and capacitor 1595.

  The rectifier circuit 1581 is connected to the terminals 1058A and 1058B, and rectifies the AC voltage input from the terminals 1058A and 1058B. The smoothing capacitor 1582 smoothes the current rectified by the rectifier circuit 1581. Note that a commercial power supply is input to the terminal 1058.

  The step-down circuit 1590 includes a transformer 1591 and an FET 1542, and the transformer 1591 includes a primary side winding 1591a and a secondary side winding 1591b.

  The primary side winding 1591a is connected between the plus side terminal 1058A and the minus side terminal 1058B, and the FET 1542 is further connected between the primary side winding 1591a of the transformer 1591 and the minus side terminal 1058B. ing. A third PWM signal is input to the gate of the FET 1542 from the FET driver IC 1583, the FET 1542 is turned on / off in response to the PWM signal, and the supplied DC voltage is converted into an AC voltage to convert the primary side winding of the transformer 1591 1591a. The AC voltage applied to the primary winding 1591a is transformed according to the turn ratio between the primary winding 1591a and the secondary winding 1591b and output from the secondary winding 1591b. Note that the microcomputer 1501 inputs the identification signal input from the terminal 1052E to the FET driver IC 1583. The FET driver IC 1583 generates a third PMW signal having a duty ratio corresponding to the battery 8 based on the identification signal. Thereby, the voltage corresponding to the battery 8 is supplied from the charging unit 5B.

  The rectifying / smoothing circuit 1585 includes a rectifying diode 1586 and a smoothing capacitor 1587. With these, the AC output stepped down by the transformer 1591 is rectified and smoothed and output to the adapter 7 side as a DC voltage. That is, the plus side of the rectifying / smoothing circuit 1785 is connected to the terminal 1052A, and the minus side is connected to the terminal 1052C. When the switch 1589 is turned on, the DC voltage rectified and smoothed by the rectifying / smoothing circuit 1585 is output to the adapter 7 via the terminal 1052A.

  The feedback control unit 1588 includes a feedback circuit 1588a and a resistor 1588b. The feedback circuit 1588a detects the current flowing through the resistor 1588b, and sends a control signal to the FET driver IC 1583 via the photocoupler 1584 in accordance with the detected current. That is, when the current of the resistor 1588b decreases, the feedback control circuit 1588a controls the FET driver IC 1583 to transmit the third PMW signal that increases the duty ratio. Conversely, when the current of the resistor 1588b increases, the FET driver IC 1583 increases. The IC 1583 is controlled to transmit the third PMW signal that decreases the duty ratio.

  The switch 1589 is connected between the terminal 1052A and the boosting / smoothing circuit 1585, and switches charging on and off. The control unit 1501 measures the charging time tc from the start of charging. When the charging time has elapsed a predetermined time tcf, the control unit 1501 turns off the switch 1589 and stops charging. The inverter device 5 is premised on the use of a dedicated battery pack 5C (for an electric tool). The predetermined time tcf is set so as to prevent the battery pack 5C from being overcharged. The switch 1589 is also turned off when a charge stop signal (LE signal) from the terminal 1052E is input to the controller 1501.

  Next, the circuit configuration of the sine wave adapter 9 will be described. FIG. 30 is a circuit diagram of the sine wave adapter 9.

  As shown in FIG. 30, the sine wave adapter 9 includes an input terminal 1097 (1097A, 1097B), an output terminal (1098A, 1098B), a rectifier circuit 1911, a first smoothing capacitor 1902, an inrush current prevention circuit 1903, , Voltage detection circuit 1094, auxiliary power supply 1095, boost circuit 1096, second smoothing capacitor 1907, inverter circuit 1098, current detection resistor 1099, driver IC 1902, microcomputer 1903, frequency switching circuit 1920, display Part 1083 (= display part 92), fan mechanism 1084, and relay circuit 1990.

  The rectifier circuit 1911 and the first smoothing capacitor 1902 rectify and smooth the rectangular wave voltage (FIG. 29C) input from the inverter device 5, and as shown in FIGS. 29D and 29E, the inverter device A DC voltage corresponding to the maximum value of the voltage input from 5 is output.

  The inrush current prevention circuit 1903 is for preventing a large inrush current from flowing in the sine wave adapter 9 when the power is turned on. Mainly, the FET 1931, the inrush current prevention resistor 1932, the voltage dividing resistor 1933, and 1934. The inrush current preventing resistor 1932 has a resistance value such that a large current does not flow through the first smoothing capacitor 1902.

  The FET 1931 has a voltage divided by the voltage dividing resistors 1933 and 1934 of the voltage output from the rectifier circuit 1911 and the first smoothing capacitor 1902 after the inverter device 5 is powered on (after the operation of the sine wave adapter 9 is started). Off until it rises. In this case, since the inrush current prevention resistor 1932 is connected in series with the first smoothing capacitor 1902 and the impedance as a whole increases, a large inrush current may flow in the sine wave adapter 9. It is prevented.

  On the other hand, when the divided voltage rises to the gate voltage of the FET 1931, the FET 1931 is turned on, and no current flows through the inrush current prevention resistor 1932. However, since a large inrush current is also settled around this time, it is prevented that electric current flows through the inrush current prevention resistor 1932 even in a steady state after the FET 1931 is turned on.

  The voltage detection circuit 1094 includes voltage detection resistors 1941 and 1942 connected in series, and the voltage detection resistor 1941 of the voltage output from the rectifier circuit 1911 and the first smoothing capacitor 1902, that is, the charging voltage of the first smoothing capacitor 1902. And 1942 are output to the microcomputer 1903.

  The auxiliary power supply 1095 includes a three-terminal regulator 1951 and oscillation prevention capacitors 1952 and 1953, and converts the voltage output from the rectifier circuit 1911 and the first smoothing capacitor 1902 into a predetermined DC voltage (for example, 5V). Then, it is supplied as a drive voltage to the microcomputer 1903 or the like.

  The booster circuit 1096 includes a coil 1961, an FET 1962, a switching IC 1963, a rectifier diode 1964, and voltage detection resistors 1965 and 1966.

  The switching IC 1963 turns the FET 1962 on and off, so that the voltage stored in the coil 1961 is output in a pulse shape. The pulse voltage is rectified and smoothed by the rectifier diode 1964 and the second smoothing capacitor 1907 and output as a DC voltage. In the present embodiment, as shown in FIG. 29 (e), a DC voltage of 141 V is output from the booster circuit 1096 and the second smoothing capacitor 1907. The voltage detection resistors 1965 and 1966 monitor the voltage of the second smoothing capacitor 1907 and feed it back to the switching IC 1963. The switching IC 1963 turns the FET 1962 on and off so that the voltage of the second smoothing capacitor 1907 is 141V.

  The inverter circuit 1098 includes an inverter unit 1981 and a filter unit 1982.

  The inverter unit 1981 includes four FETs 1981a-1981d. The drain of the FET 1981a is connected to the cathode of the rectifier diode 1964, and the source of the FET 1981a is connected to the drain of the FET 1981b. The drain of the FET 1981c is connected to the cathode of the rectifier diode 1964, and the source of the FET 1981c is connected to the drain of the FET 1981d. A second PWM signal for turning on / off the FET 1981a-1981d is input to the gates of the FETs 1981a-1981d by the driver IC 1902, and output from the booster circuit 1096 and the second smoothing capacitor 1907 by turning on / off the FET 1981a-1981d. The DC voltage thus converted is converted into a pulse wave voltage (FIG. 29 (f)).

  The filter unit 1982 includes coils 1982a and 1982b and a capacitor 1982c. The source of the FET 1981a and the drain of the FET 1981b are connected to the coil 1982a, and the source of the FET 1981c and the drain of the FET 1981d are connected to the coil 1982b. Yes. The pulse wave voltage output from the inverter unit 1981 (FETs 1981a to 1981d) is converted into a sine wave voltage through the filter unit 1982 (FIG. 29 (g)).

  The current detection resistor 1099 is connected between the source of the FET 1981 b and the source of the FET 1981 d and GND, and the terminal on the high voltage side of the current detection resistor 1099 is connected to the microcomputer 1903. With such a configuration, the current detection resistor 1099 detects the current flowing through the inverter circuit 1098 (sinusoidal adapter 9) and outputs it as a voltage to the microcomputer 1903.

  The microcomputer 1903 performs on / off control of the switching IC 1963 based on the voltage detected by the voltage detection circuit 1094. The switching IC 1963 controls the FET 1962 so that a predetermined DC voltage (141 V in this embodiment) is output from the booster circuit 1096 and the second smoothing capacitor 1907, that is, the boosted voltage of the second smoothing capacitor 1907 is 141V. PWM control is performed.

  Further, the microcomputer 1903 outputs a second PWM signal such that a pulse wave voltage having an effective value of 100 V is output from the inverter circuit 1908 to the gates of the FETs 1981a to 1981d via the driver IC 1902. In this embodiment, the microcomputer 1903 normally has the FET 1981a and FET 1981d (hereinafter referred to as the first set), the FET 1981b and FET 1981c (hereinafter referred to as the second set) as one set, and the first set. A second PWM signal that alternately turns on and off the second set at a duty ratio of 100% is output. A second PWM signal is output to turn on / off each FET at a switching frequency of 20 kHz. At this time, the output is performed at an output frequency (50 Hz in FIG. 29F) set by a frequency switching circuit 1920 described later.

  Furthermore, the microcomputer 1903 according to the present embodiment performs input voltage monitoring, boosting necessity determination, and soft start when the operation of the sine wave adapter 9 is started.

  In the input voltage monitoring, the operation of the booster circuit 1096 and the inverter circuit 1908 is performed when the maximum value of the rectangular wave voltage input from the inverter device 5 is out of the first range (99 V to 169 V in this embodiment). Stop. Thereby, damage of elements, such as FET in the sine wave adapter 9, is suppressed.

  In determining whether or not boosting is required, the microcomputer 1903 stops the operation of the booster circuit 1096 when the maximum value of the rectangular wave voltage is included in the second range (127 V or more and 141 V or less in the present embodiment). This prevents wasteful operation of the booster circuit 1096 to waste power.

  In the soft start, the current flowing through the inverter circuit 1908 over a predetermined time (100 μs in this embodiment) immediately after the operation of the inverter circuit 1908 is started is larger than a predetermined value (10 A in this embodiment). In this case, the duty of the second PWM signal is reduced to 50%, and then the duty is returned to 100% over 2.5 seconds. Thereby, it is suppressed that a large current flows in the sine wave adapter 9 and the inverter device 5.

  The frequency switching circuit 1920 includes a switch 1921 and an EEPROM 1922.

  The user can switch the frequency of the sine wave voltage output from the sine wave adapter 9 between 50 Hz and 60 Hz by pressing the switch 221 for a predetermined time (for example, 3 seconds). Specifically, when the switch 221 is pressed, a high-level frequency switching signal is input from the frequency switching circuit 1920 to the microcomputer 1903, so the microcomputer 1903 switches the frequency of the sine wave voltage output from the sine wave adapter 9. Therefore, the second PWM signal is changed according to the frequency switching signal.

  The EEPROM 1922 stores the frequency when the operation of the microcomputer 1903 is stopped, that is, when the supply of power from the inverter device 5 is stopped. The microcomputer 1903 has the frequency stored in the EEPROM 1922 when the next operation starts. A corresponding second PWM signal is output.

  The display portion 1083 includes a transistor 1831 and an LED 1832. When the microcomputer 1903 outputs a LOW signal, the transistor 1831 is turned on and the LED 1832 is lit or blinks. Although not shown in FIG. 30, the transistor 1831 actually includes a 50 Hz green lighting transistor, a 50 Hz red lighting transistor, a 60 Hz green lighting transistor, and a 60 Hz red lighting transistor. LED 1832 is a 50 Hz green LED connected to a 50 Hz green lighting transistor, a 50 Hz red LED connected to a 50 Hz red lighting transistor, a 60 Hz green LED connected to a 60 Hz green lighting transistor, and a 60 Hz red lighting. The microcomputer 1903 outputs a signal for turning on the LED corresponding to the state of the sine wave adapter 9 to the display unit 1083.

  When the frequency is set to 50 Hz by the frequency switching circuit 1920, the 50 Hz green LED is turned on. When the frequency is set to 60 Hz, the 60 Hz green LED is turned on.

  When the current detected by the current detection resistor 1099 is 4A or more, the red LED having the set frequency is turned on. When the current is 5A or more, the red LED having the set frequency is blinked.

  Although not shown, a temperature detection means (for example, a thermistor) is arranged close to the FET 1962, and when the temperature detected by the thermistor is 100 degrees or more, the set frequency is green. Make the LED blink.

  Further, when the frequency is switched in the frequency switching circuit 1920, the green and red LEDs of the set frequency are flashed for 3 seconds at a cycle of 0.5 seconds, and then flashed for 2 seconds at a cycle of 0.2 seconds. Then, only the green LED is turned on. In addition, when both green LED and red LED are lit, it will light orange.

  The fan mechanism 1084 mainly includes a cooling fan 1841 and a transistor 1842, and the microcomputer 1903 operates the cooling fan 1841 by outputting an ON signal to the transistor 1842 when driving power is supplied. .

  The relay circuit 1990 includes switches 1991 and 1992. A switch 1991 is provided between the plus side terminal 1097A and the plus side terminal 1098A, and a switch 1992 is provided between the minus side terminal 1097B and the minus side terminal 1098B. On / off of the switches 1991 and 1992 is controlled by the microcomputer 1903. The relay circuit 1990 is turned on when the voltage input to the sine wave adapter 9 is a sine wave, and outputs the input voltage as it is. At this time, since the booster circuit 1096 and the inverter circuit 1098 do not operate, wasteful power consumption can be suppressed.

  FIG. 31 is a graph showing control during charging of the battery 8 by the adapter 7. The horizontal axis indicates the charging time from the charging start time t0, and the vertical axis indicates the charging current and the battery voltage, respectively. The microcomputer 1710 measures the voltage of the battery 8 from the divided voltage of the resistors 1751 and 1752 in the power supply voltage detection circuit 1750. The microcomputer 1710 obtains the time interval T1 from the charging start time t0 to the time t1 when the voltage of the battery 8 becomes V1, and determines the time interval T2 according to the length of the time interval T1. The microcomputer 1710 stops charging at time t2 after time interval T2 from time t1. As described above, the inverter device 5 automatically turns off the switch 1589 when the elapsed charging time tc has passed the predetermined time tcf. The battery 8 of the present embodiment has a battery capacity (38 Ah) larger than the battery pack 5C (capacity 3.0 Ah). The predetermined time tcf is a time for protecting the battery pack 5C from overcharging. When the battery pack 5C is a lithium battery, a protection IC is incorporated in the battery pack to prevent overcharge, overdischarge, and overcurrent. The charging stop signal is output from 5C to the inverter device 5 side, so that it is not overcharged. The same applies to overdischarge and overcurrent. If the protection IC does not operate for some reason, the charging completion time tcf (reference value) of the battery pack 5C is stored in the control unit 1501, so the switch 1589 is forcibly turned off when this charging time elapses. Like to do. If the upper limit of the charging time is the predetermined time tcf, it may be an insufficient time to fully charge the battery 8 having a larger capacity than the lithium battery pack 5C. Therefore, the microcomputer 1710 transmits a reset signal via the charging timer reset circuit 1781 before the charging time reaches tcf, so that the elapsed charging time tc in the inverter device 5 is reset to zero. Also, the reset signal is transmitted before the time tcf elapses from the time when the reset signal is transmitted. Therefore, the microcomputer 1710 continues to transmit a reset signal at a predetermined interval (an interval shorter than the time tcf) until the charging time of the battery 8 reaches t2. Thus, the inverter device 5 is prevented from turning off the switch 1589, and the battery 8 can be charged until time t2. Even if the reset signal is not transmitted at a predetermined interval, if it is determined that the charged battery is the lead storage battery 8, a reset signal is output from the charge timer reset circuit 1781 to disable the charge timer. Good.

  As shown in FIG. 32A, the charging voltage V1 of the battery 8 is determined to be different depending on the temperature of the battery 8 detected by the thermistor 1707 and the temperature detecting means 1707A. As shown in FIG. 32B, the relationship between the time interval T1 and the time interval T2 is also determined by the temperature of the battery 8 indicated by the thermistor 1707 (temperature detection unit 1707A).

  FIG. 33 is a flowchart showing charge / discharge control by the microcomputer 1710. In the charge / discharge control, the time T2 shown in FIG. 32 (b) is obtained. At the start of charge / discharge control, the base current is not input to the base of the transistor 1784 in the charging circuit 1770, so that the FET 1771 is off. For this reason, the charging path is blocked and the battery 8 is not charged. Independent of charge / discharge control, the microcomputer 1710 transmits a reset signal as described above. The battery 8 can be charged when the terminal 1058 of the inverter device 5 is connected to a commercial power source.

  In S1, the microcomputer 1710 determines whether the voltage of the battery 8 indicated by the power supply voltage detection circuit 1750 is 10.5V or higher. If the voltage of the battery 8 is 10.5 V or higher (S1: YES), in S3, the microcomputer 1710 indicates that the temperature of the battery 8 indicated by the thermistor 1707 (temperature detection unit 1707A) is -15 ° C. or higher and lower than 60 ° C. Determine whether or not. If the voltage of the battery 8 is less than 10.5 V (S1: NO), or if the temperature of the battery 8 is less than −15 ° C. or 60 ° C. or more (S3: NO), the microcomputer 1710 in S5 Outputs a discharge stop signal from the discharge stop circuit 1786 to stop discharging of the inverter device 5 and stop discharging of the battery 8. That is, when receiving the discharge stop signal from the discharge stop circuit 1786, the control unit 1501 of the inverter device 5 stops the signal to one or both of the booster circuit 1540 and the inverter circuit 1570. Thereby, it can prevent that the battery 8 will be in an overdischarged state. Further, since the temperature of the battery 8 is not discharged even in the case of an abnormal temperature outside the predetermined range, rapid performance deterioration of the battery 8 can be suppressed.

  After S5 is executed, or when the temperature of the battery 8 is not lower than −15 ° C. and lower than 60 ° C. (S3: YES), in S7, the microcomputer 1710 indicates that the voltage of the battery 8 indicated by the power supply voltage detection circuit 1750 is 12 Judge whether it is less than 85V. When the voltage of the battery 8 indicated by the power supply voltage detection circuit 1750 is greater than 12.85 V (S7: NO), the process returns to S1. That is, when the voltage of the battery 8 is greater than 12.85 V, the voltage is sufficiently high and the battery 8 does not need to be charged. Therefore, the inverter device 5 or the sine wave adapter 9 is not charged without charging from S11 described below. When an external device is connected to the battery 8, the battery 8 is discharged.

  If the voltage of the battery 8 indicated by the power supply voltage detection circuit 1750 is 12.85 V or less (S7: YES), whether the temperature of the battery 8 indicated by the thermistor 1707 is not lower than −10 ° C. and lower than 50 ° C. in S9 Judge whether. When the temperature of the battery 8 indicated by the thermistor 1707 is −10 ° C. or higher and lower than 50 ° C. (S9: YES), in S11, the microcomputer 1710 outputs a charge start signal to the base of the transistor 1774 of the charging circuit 1770 to turn on the FET 1771. Thus, the terminals 1072A and 1071A are energized to start charging the battery 8.

  On the other hand, when the temperature of the battery 8 indicated by the thermistor 1707 is lower than −10 ° C. or higher than 50 ° C., the microcomputer 1710 turns off the FET 1771 of the charging circuit 1770 and stops charging the battery 8 in S13. . In S15, the microcomputer 1710 outputs a charge stop signal to the terminal 1072F, turns off the switch 1589 of the inverter device 5, and stops the charging function. That is, charging is not performed when the temperature is inappropriate for charging. Thereby, the performance deterioration of the battery 8 is suppressed.

  In S17, timing of the charging interval T1 from the current time t0 is started. In S19, it is determined whether or not the charging current indicated by the charging current detection circuit 1730 is 0.5 A or more. When the charging current indicated by the charging current detection circuit 1730 is 0.5 A or more (S19: YES), the microcomputer 1710 determines whether the microcomputer 1710 indicates that the value indicated by the thermistor 1707 is −10 ° C. or higher and lower than 50 ° C. Judging. When the value indicated by the thermistor 1707 is −10 ° C. or higher and lower than 50 ° C. (S21: YES), in S23, the microcomputer 1710 determines whether the battery temperature is 40 ° C. or higher and lower than 50 ° C. When the battery temperature is 40 ° C. or higher and lower than 50 ° C. (S23: YES), in S29, the microcomputer 1710 sets the charging voltage V1 to 13.9V (see FIG. 32A), and the power supply voltage detection circuit 1750 is set. It is determined whether or not the voltage indicated by is equal to or higher than the voltage V1 (13.9V).

  When the battery temperature is not in the range of 40 ° C. or higher and lower than 50 ° C., that is, when the battery temperature is −10 ° C. or higher and lower than 40 ° C. (S23: NO), in S25, the microcomputer 1710 sets the charging voltage V1 to 14. 4V is set (see FIG. 32A), and it is determined whether or not the voltage indicated by the power supply voltage detection circuit 1750 is equal to or higher than the voltage V1 (14.4V).

  When the voltage (voltage of the battery 8) indicated by the power supply voltage detection circuit 1750 is equal to or higher than 14.4V which is the value of the voltage V1 (S25: YES), or the voltage indicated by the power supply voltage detection circuit 1750 is the voltage V1 ( 13.9V) or higher (S29: YES), in S27, the microcomputer 1710 stores the time interval T1 from the time t0 to the current time t1. Here, the current time t1 is a time when the battery voltage becomes the voltage V1.

  When the voltage indicated by the power supply voltage detection circuit 1750 is less than 14.4V, which is the value of the voltage V1 (S25: NO), or the voltage indicated by the power supply voltage detection circuit 1750 is less than the voltage V1 (13.9V). When there is (S29: NO), the process returns to S19.

  When the charging current indicated by the charging current detection circuit 1730 is less than 0.5 A (S19: NO), or when the value indicated by the thermistor 1707 is not in the range of −10 ° C. or higher and lower than 50 ° C. (S21: NO), sufficient In step S31, the microcomputer 1710 stops inputting the base current to the base of the transistor 1784 in the charging circuit 1770, and the battery 8 is connected to the battery 8 because the charging current is not input or the temperature is not suitable for charging. Stop charging. In S33, the microcomputer 1710 outputs a charge stop signal to the terminal 1072F to stop the charging function of the inverter device 5.

  In S35 of FIG. 34, the microcomputer 1710 determines whether the time interval T1 when the battery voltage reaches the charging voltage V1 is 22 hours or more. When the time interval T1 is 22 hours or longer (S35: YES), in S37, the microcomputer 1710 determines whether the temperature indicated by the thermistor 1707 is 10 ° C. or higher. When the temperature indicated by the thermistor 1707 is less than 10 ° C. (S37: NO), in S39, the microcomputer 1710 sets the time interval T2 until the charging is completed to 5 hours. When the temperature indicated by the thermistor 1707 is 10 ° C. or higher (S37: YES), in S41, the microcomputer 1710 sets the time interval T2 to 2.5 hours.

  When the time interval T1 is less than 22 hours (S35: NO), in S43, the microcomputer 1710 determines whether the time interval T1 is 11 hours or more. When the time interval T1 is 11 hours or longer (S43: YES), in S45, the microcomputer 1710 determines whether the temperature indicated by the thermistor 1707 is 10 ° C. or higher. When the temperature indicated by the thermistor 1707 is less than 10 ° C. (S45: YES), in S47, the microcomputer 1710 sets the time interval T2 to 4 hours. When the temperature indicated by the thermistor 1707 is 10 ° C. or higher (S45: NO), in S49, the microcomputer 1710 sets the time interval T2 to 1.5 hours.

  When the time interval T1 is less than 11 hours (S43: NO), in S51, the microcomputer 1710 determines whether the time interval T1 is 30 seconds or more. When the time interval T1 is 30 seconds or longer (S51: YES), in S53, the microcomputer 1710 determines whether the temperature indicated by the thermistor 1707 is 10 ° C. or higher. When the temperature indicated by the thermistor 1707 is less than 10 ° C. (S53: NO), in S55, the microcomputer 1710 sets the time interval T2 to 2.5 hours. When the temperature indicated by the thermistor 1707 is 10 ° C. or higher (S53: YES), in S57, the microcomputer 1710 sets the time interval T2 to 0.5 hours.

  When the time interval T1 is less than 30 seconds, the time interval T2 is set to 0 seconds in S59. That is, charging is completed.

  In S61, the microcomputer 1710 measures the elapsed time from the time t1.

  In S63, the microcomputer 1710 determines whether or not the charging current indicated by the charging current detection circuit 1730 is 0.5 A or more. When the charging current indicated by the charging current detection circuit 1730 is 0.5 A or more (S63: YES), in S65, the microcomputer 1710 determines whether the value indicated by the thermistor 1707 is −10 ° C. or more and less than 50 ° C. When the value indicated by the thermistor 1707 is equal to or higher than −10 ° C. and lower than 50 ° C. (S65: YES), it is determined whether the elapsed time from the time t2 has passed the time interval T2. When the elapsed time from the time t2 does not pass the time interval T2 (S67: NO), the process returns to S61. In other words, the processing of S63 to S65 is to determine whether or not an environment capable of charging is maintained from t1 to time interval T2 (until charging is completed).

  On the other hand, when the charging current indicated by the charging current detection circuit 1730 is less than 0.5 A (S63: NO), the value indicated by the thermistor 1707 is less than −10 ° C. and 50 ° C. or more (S65: NO), or time When the elapsed time from t2 has passed the time interval T2 (S67: YES), in S69, the microcomputer 1710 turns off the FET 1771 of the charging circuit 1770 and stops charging the battery 8. In S71, the microcomputer 1710 outputs a charge stop signal to the terminal 1072F to stop the charging function of the inverter device 5.

  Through the above processing, the adapter 7 can perform discharge according to the electrical characteristics of the battery 8. That is, in S5, when the voltage of the battery 8 drops below 10.5 V or when the temperature of the battery 8 is not in the range of −15 ° C. or higher and lower than 60 ° C., the discharging of the battery 8 is stopped. Thereby, the overdischarge of the battery 8 can be prevented in consideration of the usage environment and electrical characteristics of the battery 8.

  Further, a predetermined charging voltage V1 is set based on the temperature of the battery 8, and the time interval T2 is determined based on the time interval T1 required for charging to the set predetermined voltage V1, and the charging end time t2 Have decided. Thereby, the charging time can be set so as to be optimal for the usage environment and electrical characteristics of the battery 8. That is, it is possible to avoid a situation where the battery 8 is not sufficiently charged or a situation where it is overcharged. If the charging current is less than 0.5 A, charging is stopped. Thereby, the battery 8 can be charged only when a sufficient charging current is supplied. In addition, the charging current of the battery 8 is around 5A, which is the same as the charging current of the battery pack 5C. Further, by switching the charging current during charging, for example, 5A at time interval T1 and 1A at T2, the charging capacity can be increased as compared with the case where charging is continued with the same charging current 5A.

  Since the battery 8 does not include a control circuit for controlling the battery voltage, charging / discharging current, and the like, if the battery 8 is directly connected to the inverter device 5, the battery 8 becomes overcharged, overdischarged, or overcurrentd. There is a possibility of degrading the performance. Therefore, in the present invention, the inverter 3 is connected via the adapter 3 dedicated to the battery 8. The adapter 3 incorporates a control circuit unit (a microcomputer, voltage monitoring, current monitoring, identification means, etc.) for controlling the battery 8. By receiving the control signal from the adapter 3, the inverter device 5 can be controlled to prevent the battery 8 from becoming in an abnormal state and preventing battery performance deterioration. The inverter device 5 can perform the same control regardless of the connected battery (battery 8, battery pack 5C). When the adapter 3 is connected, charge / discharge is controlled by a signal from the adapter 3. Yes. Moreover, you may change charge control according to the battery connected. This point will be described with reference to FIG.

  The output control of the inverter device 5 will be described with reference to FIG. In S201, the operator turns on the power switch 1525. Thereby, a voltage is supplied from the battery 8 to the constant voltage circuit 1521, and power is supplied to the control unit 1501.

  In S202, the control unit 1501 receives an identification signal from the terminal 1052E. As described above, the identification signal is a signal determined by the identification resistor 1785 of the adapter 7 or the identification resistor of the battery pack 5C.

  In S203, the control unit 1501 determines whether the adapter 7 is attached to the inverter device 5 based on the identification signal.

  When the adapter 7 is not attached (S203: NO), it is determined that the battery pack 5C is attached to the inverter device 5. In S204, the control unit 1501 sets the overcurrent threshold to a value corresponding to the battery pack 5C. Set to. Here, the overcurrent threshold is provided in order to protect the overcurrent from being discharged from the power source (battery pack 5C or adapter 7) of the inverter device 5.

  In S205, the control unit 1501 sets the overdischarge voltage threshold to a value corresponding to the battery pack 5C.

  In S206, the control unit 1501 sets an overheat temperature protection set value corresponding to the battery pack 5C. Note that a protection IC is built in the battery pack 5C, and the battery pack 5C alone detects and protects overcharge, overdischarge, and overcurrent. These abnormal signals are input to the terminals 1052F and 1052G of the inverter device 5, and the control unit 1501 controls each FET and the like so as to stop charging and discharging.

  When the adapter 7 is attached (S203: YES), the control unit 1501 sets the overcurrent threshold to a value corresponding to the battery 8 in S207. Since the battery 8 can pass a larger current than the battery pack 5C, the overcurrent threshold corresponding to the battery 8 is set to a value larger than the overcurrent threshold of the battery pack 5C.

  In step S <b> 208, the control unit 1501 sets the overdischarge voltage threshold value to a value corresponding to the battery 8.

  In step S <b> 207, the control unit 1501 sets an overheat temperature protection set value corresponding to the battery 8.

  In step S210, the control unit 1501 measures the boosted voltage by dividing the resistances 1561 and 1562, and determines whether the boosted voltage is larger than the target voltage. When the boosted voltage is equal to or lower than the target voltage (S210: NO), in S211, the control unit 1501 changes the first PMW signal so that the duty ratio increases. When the boosted voltage is higher than the target voltage (S210: YES), in S211, the control unit 1501 changes the first PMW signal so that the duty ratio decreases. That is, the FET 1531 is controlled so that the boosted voltage of the second smoothing capacitor 1553 is 141V.

  In step S213, the control unit 1501 outputs a second PMW signal via the PMW signal output unit 1511, and outputs a rectangular wave-shaped AC voltage.

  In step S214, the control unit 1501 measures the current of the current detection resistor 1517, and determines whether the measured current value is greater than the load current threshold.

  When the measured current value is equal to or less than the overcurrent threshold (S214: NO), the voltage of the power source (adapter 7 or battery pack 5C) is detected by the divided voltages of the resistors 1511 and 1512 in S215, and the detected voltage is It is determined whether it is smaller than the overdischarge voltage threshold.

  When the voltage of the power source (adapter 7 or battery pack 5C) is equal to or higher than the overdischarge voltage threshold (S215: NO), in S216, the controller 1501 causes the temperature of the power source (adapter 7 or battery pack 5C) to overheat. Determine if it is greater than the protection setting. Note that the temperature of the adapter 7 is a temperature measured by the thermistor 1707 and is transmitted by the control unit 1710 to the control unit 1501 via the terminals 1072F and 1052F. Further, the temperature of the battery pack 5C is a temperature measured by the thermistor 1059B. When the temperature of the power source (adapter 7 or battery pack 5C) is lower than the overheat protection set value, the process returns to S210.

  When the measured current value is larger than the overcurrent threshold (S214: YES), when the voltage of the power source (adapter 7 or battery pack 5C) is smaller than the overdischarge voltage threshold (S215: YES), the power source (adapter 7 or When the temperature of the battery pack 5C) is equal to or higher than the overheat protection set value (S216: YES), at least one of the booster circuit 1510 and the inverter circuit 1570 is stopped to stop the voltage output. Thereby, according to the characteristic of a power supply (adapter 7 or battery pack 5C), it can prevent that an overcurrent is output, an overdischarge occurs, and the temperature of a power supply rises. Instead of stopping the voltage output, the control device 1501 may control at least one of the booster circuit 1510 and the inverter circuit 1570 so as to decrease the voltage output.

  The output control of the sine wave adapter 9 will be described with reference to FIG. In step S101, the microcomputer 1903 determines whether the input voltage is direct current or alternating current. When the input voltage is DC (S101: YES), the process proceeds to S103. If the input voltage is AC (S101: NO), in S115, the microcomputer 1903 determines whether the input voltage is a rectangular wave voltage. As shown in FIG. 29C, the rectangular wave-shaped AC voltage continues for a time interval T0 when the voltage is 0V. On the other hand, the sinusoidal AC voltage in FIG. 29 (g) is instantaneous when the voltage is 0, and is therefore much shorter than the time interval T0. Therefore, a reference time Ts shorter than the time interval T0 and longer than 0 is set. The reference time interval Ts is a time sufficiently longer than the instantaneous time when the sinusoidal AC voltage becomes zero. If the time when the voltage of the input voltage is 0 is longer than the reference time interval Ts, the microcomputer 1903 determines that the input voltage is a rectangular wave AC voltage (S115: YES), and proceeds to S103. On the other hand, if the time when the voltage of the input voltage is 0 is shorter than the reference time interval Ts, it is determined that the input voltage is a sinusoidal AC voltage (S115: NO), and in S117, the microcomputer 1903 determines the input voltage. It is determined whether the frequency is 50 Hz or 60 Hz. When the frequency of the input voltage is neither 50 Hz nor 60 Hz (S117: NO), the process proceeds to S103. When the frequency of the input voltage is 50 Hz or 60 Hz, the inverter circuit 1908 is stopped in S119, and in S121, the microcomputer 1903 waits for 5 seconds from the stop of the inverter circuit 1908. When 5 seconds elapse after the inverter circuit 1908 is stopped, the AC output is completely cut off. In S123, the relay circuit 1990 (switches 1991, 1992) is turned on, and the input voltage is output as it is without being converted. This is because if the frequency of the sine wave AC voltage is 50 Hz or 60 Hz, it can be directly input to a general electronic device.

  On the other hand, in S103, the microcomputer 1903 determines whether the frequency switching circuit 1920 is set to 50 Hz. If the setting of the frequency switching circuit 1920 is set to 50 Hz (S103: YES), in S105, the microcomputer 1903 sets the output of the inverter circuit 1908 to 50 Hz. If the setting of the frequency switching circuit 1920 is set to 60 Hz (S103: NO), in S105, the microcomputer 1903 sets the output of the inverter circuit 1908 to 60 Hz.

  In S109, the microcomputer 1903 turns off the relay circuit 1990 (switches 1991 and 1992) to prevent the input voltage from being output as it is. In S111, the microcomputer 1903 waits for 5 seconds and waits for the AC output to be completely cut off. In S113, the microcomputer 1903 operates the inverter circuit 1908 to convert the input voltage into a sinusoidal AC voltage and output it.

  With the above configuration, when a sinusoidal AC voltage is input to the sine wave adapter 9, the input voltage is output as it is without being converted. Therefore, it is possible to prevent loss due to power conversion by converting the input sinusoidal AC voltage.

  A second modification of the present embodiment is shown in FIGS. In the second modification of the present embodiment, the handle 3 is provided with a pressing portion 139. In the above-described embodiment, the member on the front side (main body 2 side) of the cushioning material 34A is in contact with the outer body 24 to prevent the handle 3 from rattling, but in the second modification example, The pressing portion 139 contacts the outer body 24 to prevent the handle 3 from rattling.

  Two pressing portions 139 are provided in each extending portion 35 at a predetermined distance in the vertical direction, and the entire handle 3 is provided with four pressing portions 139. As shown in FIG. 38, the pressing portion 139 protrudes forward (on the main body 2 side). When the handle 3 is in the storage position, all four pressing portions 139 come into contact with the main body 2. Thereby, since the handle | steering-wheel 3 and the outer body 24 contact | abut at four places, the shakiness of the handle | steering-wheel 3 can be prevented reliably. When the handle 3 is in the extended position, only the lower two pressing portions 139 are in contact with the outer body 24. Thereby, rattling of the handle 3 can be prevented even when the handle 3 is pulled out.

  The handle grip 33 is provided with a rubber grip 133 so that an operator can easily grip the handle grip 33.

  A third modification of the present embodiment is shown in FIGS. In the above-described embodiment, the contact portion 31B is employed as the stopper of the handle 3. However, in the third modification, the convex portion 224A serves as a stopper.

  In the third modification, the convex portion 224A is provided on the rear surface of the outer body 24 so as to protrude outward. The end of the cushioning material 34 </ b> A on the outer body 24 side is located closer to the outer body 24 than a virtual line drawn in parallel with the extension 35 from the convex portion 24 </ b> A of the outer body 24 located above the end. That is, the convex portion 24A of the outer body 24 is located on the rear side from the end portion of the cushioning material 34A. Thereby, when the handle | steering-wheel 3 exists in an expansion | extension position, 224A and buffer material 34A contact | abut. The unexpected movement of the handle 3 to the main body 2 can be suppressed.

  If there is no problem in strength, as in the third modification, the main body 2 is provided with a convex portion 224A as an alternative to the abutting portion 31B, and the convex portion and the abutted portion 34 are abutted. By doing so, it is possible to prevent damage to the connection portion R between the contacted portion 34 and the extending portion 35 with a relatively inexpensive configuration. Further, if only the shape of the abutted portion 34 is a quadrangular shape and brought into contact with the convex portion 224A, the abutment can be smoothly performed even when the height of the convex portion provided on the main body 2 is lowered. Can do.

  The present invention can obtain the following effects by the power supply device 1 described above.

  As the power supply device 1, the inverter device 5 and the battery 8 having a large capacity are accommodated in the main body 2 and can be carried, so that even in areas where commercial AC voltage power is not supplied, for example, in disaster areas affected by large earthquakes. It is possible to supply AC voltage power for a long time. Moreover, since the battery 8 which can be charged is provided, the battery 8 can be charged by connecting a commercial AC power source to the inverter device in an area where the power of the commercial AC voltage is supplied.

  Since the inverter device 5 can be fixed on the upper lid 4, when the sine wave adapter is accommodated in the main body 2, the inverter device is fixed to the engaging portion 43 </ b> A and disposed on the outer surface of the upper lid 4. Can do. For this reason, the outer diameter dimension of the main body 2 can be made small. In addition, the power supply device 1 includes the sine wave adapter 9 that converts the rectangular wave AC voltage output from the inverter device 5 into a sine wave AC voltage and outputs the sine wave AC voltage. be able to.

  Since the battery 8 is made of an in-vehicle lead storage battery, the capacity of the battery 8 can be increased. Moreover, since the inverter device 5 can also connect the battery pack 5C for electric tools, it can use the battery 8 and the battery pack 5C properly according to a use application. If the battery 8 is used, the operation time of the device connected to the power supply device 1 can be made longer than when the power tool battery pack 5C is used. On the contrary, if the battery pack 5C for electric tools is used, the inverter device 5 can be carried on the shoulder or the like.

  The main body 2 is provided with a handle 3 that can be gripped for transporting the main body 2, and the handle 3 is held by a handle holding portion 31A provided in the main body 2, so that the power supply device can be easily moved. can do.

  Since the handle 3 is composed of the first handle portion 37 and the second handle portion 38, the handle 3 is manufactured by blow molding to reduce the cost and the battery 8 is accommodated in the main body 8. The handle 3 can be strong enough to grip and carry the handle 3. Moreover, since the 1st handle part 37 and the 2nd handle part 38 are the same shapes, they can be manufactured with the same metal mold | die and manufacturing cost can be reduced.

  Since the main body 2 is provided with an abutting portion 31B that restricts the movement of the handle 3, even when the handle 3 is manufactured by blow molding, the handle 3 is in the extended position when the handle 3 is moved. It is possible to prevent the handle 3 from being damaged by contact with the portion other than the contact portion 31B. Further, by using a pressed part as the contact portion 31B, the inexpensive contact portion 31B and the handle 3 which is an inexpensive blow-molded product can be used in combination, and the manufacturing cost for the power supply device 1 can be reduced. it can.

  Since the contact portion 31B is provided with the second damper 31D and the contacted portion 34 is provided with the buffer material 34A, the handle 3 is forcibly moved from the storage position to the extended position. In this case, the collision load generated between the contact portion 31B and the handle 3 can be reduced. For this reason, durability of the handle | steering-wheel 3 and the contact part 31B can be improved.

  Since the cushioning material 34A is provided over the entire circumference of the abutted portion 34, even when the main body 2 is overturned and the handle 3 approaches the ground or the floor, the cushioning material 34A is not grounded. The impact when the handle 3 comes into contact with the ground, the floor or the like can be reduced by colliding with the floor or the like, and the handle 3 can be prevented from being damaged.

    Since the buffer material 34A is made of a rubber damper, it can be made of an inexpensive and simple material.

  Since the main body 2 is provided with the wheels 21, the power supply device 1 can be easily moved.

  The upper lid 4 is provided with a latch plate 43. By fixing the inverter device 5 to the upper lid 4, the display panel 51 of the inverter device 5 can be used in an easily viewable state. Further, access to the inverter device 5 is facilitated.

  The engaging portion 43A of the latch plate 43 protrudes from the upper lid 4, and the upper lid 4 is provided with a wall portion 44 that protrudes more than the engaging portion 43A, thereby preventing other objects from colliding with the engaging portion 43A. It is possible to protect the engaging portion 43A.

  Since the upper surface 4A of the upper lid 4 is inclined downward toward the flat portion 4B, when rainwater or the like drops on the inclined surface, the rainwater can flow toward the flat portion 4B of the upper lid 4. For this reason, it is possible to prevent rainwater or the like from accumulating on the outer surface of the upper lid 4.

  Since the upper surface 4A of the upper lid 4 is inclined downward by 1 ° or more toward the flat portion 4B, rainwater or the like can be flowed effectively.

  Since the upper lid groove portion 47 is formed in the upper lid 4, a cable connected to the inverter device 5 or the like can be passed through the upper lid groove portion 47 from outside to inside of the main body 2 or from inside to outside.

  A peripheral edge portion 47 </ b> A is provided around the upper lid groove portion 47, and rainwater or the like can be prevented from flowing into the main body 2 through the upper lid groove portion 47.

  Since the first recess 48 has a shape along the housing portion 54, the lower surface 4 </ b> C around the first recess 48 abuts against the adapter 7 when the adapter 7 is connected to the housing portion 54. 4 can prevent the opening 2a from being closed.

  Since the inverter device 5 is accommodated in the upper chamber 26, the inner lid 6 is accommodated in the intermediate chamber 27, and the battery 8 is accommodated in the lower chamber 28, the battery 8, the inverter device 5, and the inner lid 6 are connected to the main body 2. Can be accommodated compactly.

  When the inverter device 5 is placed on the inner lid 6, the cable storage space 6 b is formed so as to face the inverter device 5, and therefore an adapter cable 71 for connecting the inverter device 5 and the battery 8 is provided. Therefore, it is possible to avoid forcibly bending the adapter cable 71.

  Since the sine wave adapter 9 that can be accommodated in the upper chamber 26 is further provided, the power of the AC voltage of the sine wave can be supplied from the power supply device 1.

  When the sine wave adapter 9 is placed on the inner lid 6, the cable storage space 6 b is formed so as to face the sine wave adapter 9, and thus a cable for connecting the sine wave adapter 9 and the battery 8. Can be accommodated, and it is possible to avoid forcibly bending the cable.

  Since the inner lid groove portion 63 is formed in the inner lid 6, a cable or the like connected to the battery 8 is passed through the inner lid groove portion 63 from the lower surface side of the inner lid to the upper surface side or from the upper surface side to the lower surface side. be able to.

  Since the through-hole 6 a is formed in the inner lid 6, rainwater or the like that has flowed into the upper chamber 26 can flow to the lower chamber 28. Even if hydrogen gas is generated from the battery 8 in the lower chamber 28, the hydrogen gas can be exhausted to the upper chamber 26.

  Since the buffer material 2A is filled between the outer body 24 and the inner body 25, the temperature change in the main body 2 can be suppressed, and the performance of the battery 8 can be stabilized. Further, the shock absorbing material 2A can absorb the impact received when another object collides with the outer body, and the battery 8 and the inverter device 5 accommodated in the main body 2 can be protected.

  A drain hole 25b is formed in the inner body 25 and has an inclined portion 25B that slopes downward toward the drain hole 2b. Therefore, rain water that has entered the main body 2 flows into the drain hole 2b. Can be discharged to the outside.

  Since the inclined portion 25B is inclined at an angle of 1 ° or more with respect to the horizontal, rainwater that has entered the main body 2 can be effectively allowed to flow into the drain hole 2b.

  Since the battery 8 is supported by the battery shaft 83 in the left-right direction and is in contact with the restricting portion 82A in the front-rear direction, not only can the battery 8 be stably held in the left-right direction, but also the end of the battery 8 Can be stably positioned in the front-rear direction that intersects the left-right direction.

  Between the battery plate 82 and the rib 25C (inner body 25), an anti-slip member 25D that prevents the battery plate 82 from sliding relative to the inner body 25 is provided. Can be stably held against.

  Between the battery plate 82 and the battery 8, a non-slip member 82 </ b> B that prevents the battery 8 from sliding with respect to the battery plate 82 is provided, so that the battery 8 can be stably held with respect to the battery plate 82. can do.

  Since the anti-slip members 25D and 82B are made of rubber dampers, the battery plate 82 can be held with respect to the inner body 25 and the battery 8 can be held with respect to the battery plate 82 easily and effectively.

    Since the elastic material 87 is provided on the surface of the support plate 85 in a range longer than the distance between the terminals 81, when the support plate 85 is removed from the battery shaft 83 in an attempt to replace the battery 8, the terminals 81 are mistaken. Even when the support plate 85 is dropped, it is possible to prevent a short circuit.

  The power supply device according to the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made within the scope described in the claims.

  In the above-described embodiment, either the inverter device 5 or the sine wave adapter 9 can be accommodated in the main body 2, but the height of the main body 2 is increased and the inverter device 5 and the sine wave are placed in the main body 2. Both adapters 9 may be accommodated. Even in this case, it is preferable that the upper lid 4 is configured so as not to be closed when the adapter 7 is mounted in the accommodating portion 54.

  In the above-described embodiment, one drain hole 25a is formed in the contact portion 25A, but a plurality of drain holes may be formed. Thereby, even if a large amount of water enters the main body 2, it can be quickly discharged to the outside.

  In the above-described embodiment, urethane is adopted as the buffer material 2A, but other materials such as polystyrene may be used. Moreover, it is not necessary to fill the buffer material 2A.

  In the above-described embodiment, polyethylene is used for the inner body 25, but the inner body 25 may be polypropylene.

  In the above-described embodiment, the handle 3 is formed by combining the first handle portion 37 and the second handle portion 38, but the handle 3 may be made of metal.

  In the embodiment described above, the cushioning material 34A is provided on the handle 3 and the second damper 31D is provided on the contact portion 31B. However, only one of them may be provided.

Further, a cushioning material may be provided on the lower surface of the reinforcing member 36. Thereby, when an operator pushes down the handle | steering-wheel 3, the upper surface of the holding | maintenance part 31 and buffer material contact | abut, and an impact can be relieved.
In the above-described embodiment, the upper lid groove portion 47 is provided on the rear surface, but may be a surface other than the side surface on which the hinge attachment portion 46 is provided. A plurality of upper lid groove portions 47 may be provided.

  In the above embodiment, the inverter device 5 can be placed on the inner lid 6, but a member corresponding to the engaging portion 43 </ b> A is provided on the inner lid 6 so that the inverter device 5 can be fixed to the inner lid 6. Also good. Further, the inner lid 6 may be provided with an engaging portion that engages with the bottom surface of the sine wave adapter 9 and fixes the sine wave adapter 9.

  In the above-described embodiment, the adapter housing portion 62 accommodates a part of the adapter 7 and the adapter cable 71. However, the battery pack 5C may be accommodated. Moreover, you may comprise so that the adapter 7 and the battery pack 5C can be accommodated simultaneously.

  In the above-described embodiment, the adapter 7 is accommodated in the adapter accommodating portion 62 so that the adapter 7 is placed on the bottom surface 6 </ b> A of the inner lid 6, but the adapter 7 is fixed so that the adapter 7 does not move in the adapter accommodating portion 62. You may provide the member to do.

  In the above-described embodiment, the bottom surface 6A of the inner lid 6 is a horizontal surface, but may be inclined downward toward the water drain hole 6a. Thereby, it becomes a structure where water does not easily accumulate in the adapter storage portion 62.

  In the above-described embodiment, the inner lid groove portion 63 is provided in the rear peripheral wall 61, but may be provided in the peripheral wall 61 in another position. In addition, a plurality of inner lid groove portions 63 may be provided on the peripheral wall 61.

  The main body 2 may have a cooling function. Specifically, an outside air inlet is provided on one surface of the main body 2, and an exhaust fan is provided on the surface facing the one surface. Thereby, even if the battery 8 and the sine wave adapter 9 generate | occur | produce heat, the temperature rise in the main body 2 can be suppressed.

  In the present application, the temperature detection device having the temperature detection means including the thermistor is applied to the power supply device 1, but is not limited to the power supply device 1.

DESCRIPTION OF SYMBOLS 1 ... Power supply device 2 Main body 3 Handle 4 Upper lid 5 Inverter device 6 Inner cover 7 Adapter 8 Battery 9 Sine wave adapter 21 Wheel 23 Projection 24 · · Outer body 25 · · Inner body 25a · · Recess portion 25b · · Water drain hole 25D · · Anti-slip member 25B · · Inclined portion 26 · · Upper chamber 27 · · Middle chamber 28 · · Lower chamber 31 · · · Portion 37 ··· first handle portion 38 ··· second handle portion 31B · · contact portion 31C · · first damper 31D · · second damper 34A · · cushioning material 43 · · latch plate 43A · · engagement portion 44 ··· wall portion 47 ··· upper cover groove portion 47A · · peripheral edge portion 47B · · curved portion 48 · · first recess portion 49 · · second recess portion 52 · · output cable 61 · · surrounding wall 62 · · adapter housing portion 63 ..Inner cover groove 64 ..Reception part 81 ..Terminal 2 · battery plates 82B ... skidproof 82a ... shaft through hole 83 ... battery shaft 85 ... supporting plate 87 ... elastic member

Claims (7)

A box-shaped main body with an opening formed at one end;
A lid provided on the main body so as to open and close the opening;
A battery that is housed in the main body and can be charged and discharged;
An inverter device that can be accommodated in the main body and converts a DC voltage from the battery into an AC voltage and outputs the AC voltage;
The battery comprises an in-vehicle lead-acid battery, and a temperature detecting means for detecting the temperature of the electrode terminal is provided at an electrode terminal of the lead-acid battery.   2. The power supply device according to claim 1, wherein the temperature detecting means comprises a thermistor, and the thermistor is fixed to a metal crimp terminal fixed to the electrode terminal.   2. The power supply device according to claim 1, wherein the temperature detecting means is fixed to the electrode terminal of the anode of the lead storage battery.   4. The power supply device according to claim 3, wherein a thermal protector is fixed to the electrode terminal of the cathode of the lead storage battery. An adapter is connected to the electrode terminal of the lead storage battery,
5. The power supply device according to claim 4, wherein the thermal protector is disposed between the lead storage battery and an output terminal of the adapter.   6. The power supply device according to claim 4, wherein the thermal protector is fixed to a copper holder fixed to the electrode terminal.   A temperature detection device for a lead storage battery, comprising temperature detection means provided on an electrode terminal of the lead storage battery for detecting the temperature of the electrode terminal.

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