JP7518760B2 - Battery unit mounting structure and battery unit - Google Patents

Description

This disclosure relates to a battery unit mounting structure and a battery unit.

Patent Document 1 discloses a switch unit equipped with a battery that supplies power to a starter motor attached to an engine, a control circuit that controls the starter motor, a switch that starts the starter motor, and a charging circuit that charges the battery. This switch unit is provided independently of the starter motor, and can be easily attached to an engine-powered work machine by connecting it to the starter motor with a connection cord.

JP 2014-148967 A

However, since engine-powered work machines are almost always used outdoors, there is a risk that the switch unit (battery unit) will deteriorate due to exposure to wind, rain, and sunlight.

This disclosure was made in consideration of the above-mentioned problems, and aims to provide a battery unit mounting structure and a battery unit that can protect the battery unit from wind, rain, and sunlight.

In order to achieve the above object, the mounting structure of the battery unit according to the present disclosure comprises:
A box-shaped case attached to the engine or a work machine on which the engine is mounted;
a battery unit housed in the case and serving as a power supply source for a starter motor provided in the engine;
a cover for closing an opening of the case in which the battery unit is housed;
Equipped with.

According to the battery unit mounting structure disclosed herein, the cover closes the opening of the case in which the battery unit is housed, protecting the battery unit from wind, rain, and sunlight.

1 is a perspective view showing an engine in which a battery unit mounting structure according to an embodiment of the present disclosure is adopted; FIG. 2 is a circuit diagram illustrating a control configuration of the engine illustrated in FIG. 1 . FIG. 2 is a front view of a battery unit mounted on the engine shown in FIG. 1 . FIG. 4 is a left side view of the battery unit shown in FIG. 3 . FIG. 4 is a right side view of the battery unit shown in FIG. 3 . 4 is a circuit diagram illustrating a control configuration of the battery unit illustrated in FIG. 3. FIG. 1 is a perspective view showing a schematic view of a mounting structure for a battery unit according to an embodiment of the present disclosure, with a cover removed;

The battery unit mounting structure according to the embodiment of the present disclosure will be described below with reference to the attached drawings. The dimensions, materials, shapes, relative positions, etc. of the components described as the embodiment or shown in the drawings are not intended to limit the scope of the present invention and are merely illustrative examples.

Figure 1 is a perspective view showing an engine 1 in which a mounting structure for a battery unit 6 according to an embodiment of the present disclosure is adopted, and Figure 2 is a circuit diagram that shows a schematic diagram of the control configuration of the engine 1 shown in Figure 1.

The mounting structure of the battery unit 6 according to the embodiment of the present disclosure is adopted in the engine 1 or a work machine (not shown) on which the engine 1 is mounted. In the embodiment of the present disclosure, the mounting structure of the battery unit 6 adopted in the engine 1 is described as an example, but the scope of the present invention is not limited thereto and also includes the mounting structure of the battery unit 6 adopted in a work machine on which the engine 1 is mounted.

The engine 1 according to the embodiment of the present disclosure is a single-cylinder or two-cylinder air-cooled engine 1 with a displacement of 80cc to 800cc, and is used in work machines such as rice transplanters, cultivators, tillers, pumps, and generators.

As shown in FIG. 1, the engine 1 according to the embodiment of the present disclosure includes a starter motor 3 (see FIG. 2) in addition to a recoil starter 12. The recoil starter 12 is a device that rotates the crankshaft of the engine 1 and starts the engine 1 when a person who wishes to start the engine 1 grasps a starter grip 121 and pulls a rope wound around a pulley. The starter motor 3 is a motor that rotates the crankshaft of the engine 1 in place of the recoil starter 12, and in an engine 1 that employs the mounting structure of the battery unit 6 according to the embodiment of the present disclosure, the battery unit 6 (see FIG. 2) is the power supply source for the auxiliary equipment including the starter motor 3.

The engine 1 according to the embodiment of the present disclosure also includes an engine switch 21 and an engine start operation switch 22. The engine switch 21 is a switch for turning the power on and off, and is installed on the side of the engine 1 according to the embodiment of the present disclosure. The engine switch 21 is, for example, a rocker switch (also called a seesaw switch), and is turned on when starting the engine 1 and turned off when stopping the operation of the engine 1. The engine start operation switch 22 is a switch for starting the engine 1, and is installed alongside the engine switch 21 on the side of the engine 1 according to the embodiment of the present disclosure. The engine start operation switch 22 is, for example, a momentary push switch, and is pressed down when starting the engine 1 by the starter motor 3.

The engine 1 according to the embodiment of the present disclosure further includes a switch 23 for an external device. The switch 23 for an external device is, for example, a choke changeover switch 231, which is installed on the side of the engine 1 according to the embodiment of the present disclosure. The choke changeover switch 231 is, for example, a rocker switch, and is capable of switching between auto choke and manual choke.

As shown in FIG. 2, the engine 1 according to the embodiment of the present disclosure further includes a starter relay 4, a charge coil 13, and an ignition coil 15. The starter relay 4 is a relay (magnetic relay switch) that opens and closes a contact 41 provided between the battery unit 6 and the starter 3. When the contact 41 is closed, electricity is supplied from the battery unit 6 to the starter 3. The charge coil 13 is a power generating coil provided inside the flywheel and generates electricity by the rotation of the flywheel. The electricity generated by the charge coil 13 is supplied to the battery unit 6 via a regulator 14 and charged. The charge coil 13 generates electricity whenever the engine 1 is rotating, so it may have a function of grasping the operating state of the engine 1, for example, by monitoring the presence or absence of power generation in the battery unit 6. This function makes it possible to start the engine 1 safely. The ignition coil 15 is installed on the outside of the flywheel and is an integrated generator/transformer device that converts the electricity generated inside the ignition coil 15 by the rotation of the flywheel into high-voltage electricity, and the high-voltage electricity converted by the ignition coil 15 is discharged by the spark plug 16.

The battery unit 6 according to the embodiment of the present disclosure is an electrical supply source for auxiliary equipment including the starter motor 3 as described above, and supplies electricity to the starter motor 3 when the engine 1 is started, while also charging the engine 1 with electricity generated by the charge coil 13.

Figure 3 is a front view of the battery unit 6 mounted on the engine 1 shown in Figure 1. Figure 4 is a left side view of the battery unit 6 shown in Figure 3, and Figure 5 is a right side view of the battery unit 6 shown in Figure 3. Figure 6 is a circuit diagram that shows a schematic diagram of the control configuration of the battery unit 6 shown in Figure 3.

As shown in FIG. 3, the battery unit 6 mounted on the engine 1 according to the embodiment of the present disclosure has a horizontally elongated, generally rectangular parallelepiped shape and has a protrusion 6a that protrudes upward. The battery unit 6 has a generally rectangular parallelepiped shape with a length of 220 mm, a height of 75 mm, and a width of 45 mm, excluding the protrusion 6a, for example, and its weight is kept to 800 g or less, making it highly portable.

The battery unit 6 according to the embodiment of the present disclosure includes a battery pack 61 and a starting control device 7 for the engine 1 (see FIG. 6), which are housed in a housing 62 that is a horizontally elongated, roughly rectangular parallelepiped shape and has a protrusion 62a that protrudes upward.

The battery pack 61 is composed of, for example, a lithium ion battery. As shown in Fig. 6, in the battery unit 6 according to the embodiment of the present disclosure, the battery pack 61 is composed of one or more battery cells 611. The individual voltage of the battery cell 611 is 3.0 to 4.2 V, and the total capacity is 6000 to 20000 mAH , which ensures portability as the battery unit 6. In the battery unit 6 according to the embodiment of the present disclosure, the battery pack 61 is composed of, for example, four battery cells 611.

The starting control device 7 of the engine 1 is composed of a control ECU 71 (Electronic Control Unit) that controls charging and discharging of the battery pack 61. The control ECU 71 is composed of, for example, a processor including a control device and an arithmetic device, and a control board on which memories such as a ROM (Read Only Memory) and a RAM (Random Access Memory) are mounted. In the starting control device 7 of the engine 1 according to the embodiment of the present disclosure, the control ECU 71 manages the temperature (battery temperature) of the battery pack 61, the voltage (total voltage) of the battery pack 61 , and the voltage (cell voltage) of each battery cell 611. In addition, the control ECU 71 protects the battery cell 611 from over-discharging by a protection circuit 711 for each battery cell 611. The protection circuit 711 is composed of, for example, a protection IC (integrated circuit).

In addition, in the battery unit 6 according to the embodiment of the present disclosure, a wiring coupler 63 is connected to the battery unit 6. A paired wiring coupler 24 (see FIG. 2) is detachable from the wiring coupler 63, and the battery unit 6 is connected to input/output devices provided outside the battery unit 6 by attaching the paired wiring coupler 24. The input/output devices provided outside the battery unit 6 are, for example, the above-mentioned engine switch 21, engine start operation switch 22, starter relay 4, etc., and are connected to the paired wiring coupler 24 via two or more wire harnesses included in the control harness 25. Then, by attaching the paired wiring coupler 24 to the above-mentioned wiring coupler 63, multiple input/output devices such as the engine switch 21, engine start operation switch 22, and starter relay 4 are connected to the battery unit 6 at once.

In the battery unit 6 according to the embodiment of the present disclosure, an engine charging input terminal 712, a power supply detection terminal 713, an engine start operation detection terminal 714, a starter relay control terminal 715, an external device output terminal 716, and a constant voltage output terminal 717 are provided in the battery unit 6. The engine charging input terminal 712, the power supply detection terminal 713, the engine start operation detection terminal 714, the starter relay control terminal 715, and the external device output terminal 716 are connected to the control ECU 71, and the charge/discharge current from these terminals is managed by the control ECU 71. The constant voltage output terminal 717 is directly connected to the battery pack 61, and the battery voltage (total voltage) of the battery pack 61 is applied to the constant voltage output terminal 717. The wiring couplers 63 to which these terminals are respectively connected are disposed on the protrusions 62a (see FIG. 3) of the housing 62 that have a waterproof/dustproof structure.

As shown in FIG. 2 , the input/output devices connected to the battery unit 6 are the regulator 14 connected to the charge coil 13, the engine switch 21, the engine start operation switch 22, the starter relay 4, external devices 5 such as the valve control unit 51 and the choke valve 52, and the engine switch 21 (battery voltage constantly applied), which are each connected to a pair of wiring couplers 24 via an engine charging input line 251, an engine switch operation detection line 252, an engine start operation detection line 253, a starter relay control line 254, a valve device output line 255, and a battery voltage constant application line 256 .

In the battery unit 6 according to the embodiment of the present disclosure, electricity is supplied from the regulator 14 connected to the charge coil 13 through the engine charging input line 251 to the control ECU 71, and the control ECU 71 evenly charges the battery cells 611 while managing the temperature and voltage of the battery pack 61 and the voltage of each battery cell 611.

In the battery unit 6 according to the embodiment of the present disclosure, a starter motor power supply terminal 64 is provided on the housing 62 of the battery unit 6. The starter motor power supply terminal 64 is a terminal to which a power line (first power line) 641 for supplying electricity from the battery pack 61 to the starter motor 3 (starter motor relay 4) can be attached and detached, and is installed, for example, on the left side surface of the housing 62 of the battery unit 6 (see FIG. 5), and is waterproofed and dustproofed by a rubber cover.

A fuse 642 is provided on the power line 641 connecting the starter motor power supply terminal 64 and the starter motor relay 4. The fuse 642 protects the starter motor relay 4 and the starter motor 3 by melting when an overcurrent exceeding the rated current flows through the power line 641 due to over-discharging of the battery pack 61. As a result, even if the fuse 642 melts due to an overcurrent, the starter motor relay 4 and the starter motor 3 can be easily restored by replacing the power line 641.

As shown in FIG. 6, a battery protection relay 65 is provided between the starter motor power supply terminal 64 and the battery pack 61. The battery protection relay 65 has contacts between the battery pack 61 and the starter motor power supply terminal 64, and the contacts between the battery pack 61 and the starter motor power supply terminal 64 are closed in response to a command from the control ECU 71.

In the battery unit 6 according to the embodiment of the present disclosure, an external charging input terminal 66 is provided on the housing 62 of the battery unit 6. The external charging input terminal 66 is a terminal to which a power line (second power line) (not shown) for supplying electricity for charging from an external power source to the battery unit 6 can be attached and detached, and is installed, for example, on the right side surface of the housing 62 of the battery unit 6 (see FIG. 4), and is provided with a rubber cover to provide waterproof and dustproof measures.

The external power source is, for example, a household power source or a car battery. For example, when the external power source is a household power source, the power line of a dedicated charger is attached to the external charging input terminal 66, and electricity for charging is supplied from the household power source to the external charging input terminal 66. This causes the control ECU 71 to start from a standby state, and electricity is evenly charged to the battery cells 611 while managing the temperature and voltage of the battery pack 61 and the voltage of each battery cell 611. Also, for example, when the external power source is a car battery, a power line connected to the cigarette lighter socket of the car is attached to the external charging input terminal 66, and electricity for charging is supplied from the car battery to the external charging input terminal 66. This causes the control ECU 71 to start from a standby state, and electricity is evenly charged to the battery cells 611 while managing the temperature and voltage of the battery pack 61 and the voltage of each battery cell 611.

In the battery unit 6 according to an embodiment of the present disclosure, the external charging input terminal 66 is connected to the control ECU 71, and the charging electricity supplied to the external charging input terminal 66 is controlled by the control ECU 71, so that one or more battery cells 611 constituting the battery pack 61 are evenly charged.

In the battery unit 6 according to the embodiment of the present disclosure, a charging output terminal 67 is connected to the control ECU 71. The charging output terminal 67 is a terminal to which a charging input terminal provided on a portable device can be attached and detached, and by attaching the charging input terminal provided on the portable device, the control ECU 71 provided inside the battery unit 6 and the portable device provided outside the housing are connected, and electricity is supplied from the battery pack 61 to the portable device via the control ECU 71. The portable device is, for example, a mobile phone such as a smartphone, and the charging output terminal 67 is, for example, a USB output terminal 671, which is a female terminal of any of Types A, B, or C that can provide an output of up to 2 A.

In the battery unit 6 according to the embodiment of the present disclosure, the charging output terminal 67 is provided so as to extend from a protrusion 62a provided on the housing 62 of the battery unit 6 to the outside of the battery unit 6, and is provided with waterproof and dustproof measures.

As shown in FIG. 3, the battery unit 6 according to the embodiment of the present disclosure is provided with one or more indicators 68 and a remaining charge check button 69 on the front side of the housing of the battery unit 6. The one or more indicators 68 and the remaining charge check button 69 are connected to the control ECU 71. The one or more indicators 68 constitute, for example, a remaining charge indicator light and a status indicator light of the control ECU 71.

The remaining charge indicator lamp is composed of, for example, three to five LED lamps. For example, the three to five LED lamps are composed of two to four LED lamps of the same color and one LED lamp of a different color, and are controlled so that as the remaining charge of the battery pack 61 decreases, the number of LED lamps of the same color that are lit decreases, and finally an LED lamp of a different color is lit. When the remaining charge confirmation button 69 is pressed while the control ECU 71 is in a stopped state, the control ECU 71 is started from a standby state, and one or more indicators 68 are controlled to display the remaining charge of the battery pack 61 at that time.

The status indicator lamp of the control ECU 71 is composed of one to three LED lamps of different colors, and is controlled to light any LED lamp based on the state of the control ECU 71. For example, when the engine switch 21 is on and the engine 1 can be started, an LED lamp notifying that the engine can be started is lit, and after the engine 1 has started, an LED lamp notifying that the engine 1 is running is lit.

Figure 7 is a perspective view showing a schematic diagram of the mounting structure of the battery unit 6 according to an embodiment of the present disclosure, with the cover 9 removed.

As shown in FIG. 7, in the mounting structure of the battery unit 6 according to the embodiment of the present disclosure, the battery unit 6 is mounted on the side of the engine 1, but the scope of the present invention is not limited to this and includes mounting at any position on the work machine on which the engine 1 is mounted.

The mounting structure for the battery unit 6 according to the embodiment of the present disclosure includes, in addition to the battery unit 6 described above, a case 8 and a cover 9.

The case 8 is attached to the engine 1 or the work machine on which the engine 1 is mounted. The case 8 is attached, for example, to the front of the engine 1. The case 8 is box-shaped with an open front and houses the battery unit 6. The case 8 is, for example, a horizontally elongated, approximately rectangular box with an open front, with a storage area in which the battery unit 6 is stored in its lower region and a connection space for the wiring couplers 24, 63 in its upper region. The storage area has a volume slightly larger than the volume of the battery unit 6, and the battery unit 6 is stored so as to be fitted into the storage area. The connection space has a volume sufficient to connect the wiring coupler 63 and the wiring coupler 24 that is paired with the wiring coupler 63, and the above-mentioned engine switch 21 and engine start operation switch 22 are installed on the right side of the connection space, and the above-mentioned switch 23 for the external device, for example, the choke changeover switch 231, is installed on the left side of the connection space.

The cover 9 is attached to the case 8 to close the opening of the case 8 in which the battery unit 6 is housed. The cover 9 is, for example, box-shaped with an opening at the rear, and is combined with the case 8 in which the battery unit 6 is housed to close the front opening of the case 8. The cover 9 is, for example, slightly larger than the case 8 in the longitudinal direction of the case 8, and a wiring space is provided in the right area of the case 8 for the power line 641 (see Figure 2) that connects the battery unit 6 (starter motor power supply terminal 64) and the starter motor relay 4.

The cover 9 is cut out in areas corresponding to the engine switch 21 and engine start operation switch 22 described above, and the engine switch 21 and engine start operation switch 22 are exposed outside the cover 9 when the cover 9 is attached to the case 8. The cover 9 is also provided with a rectangular window 9a in an area corresponding to the switch 23 for an external device, and the switch 23 for an external device is exposed outside the cover 9 when the cover 9 is attached to the case 8.

In addition, the cover 9 is provided with a rectangular window 9b in an area corresponding to, for example, one or more indicators 68 and the remaining charge check button 69, and when the cover 9 is attached to the case 8, the one or more indicators 68 and the remaining charge check button 69 are exposed outside the cover 9.

The cover 9 has through holes at one end and the other end in the longitudinal direction, and the cover 9 is attached to the case 8 by inserting a bolt 91 through the through holes into a screw hole in the case 8. The bolt 91 that passes through the through hole is, for example, a bolt with a slot into which a coin fits, or a butterfly bolt.

In addition, in the mounting structure of the battery unit 6 according to the embodiment of the present disclosure, the above-mentioned battery unit 6 has a cushioning material 6b attached to the front surface facing the cover 9. This makes it possible to suppress vibrations transmitted from the engine 1 and the work machine to the battery unit 6 and to protect the battery unit 6.

According to the mounting structure for the battery unit 6 according to the embodiment of the present disclosure described above, the cover 9 covers the opening of the case 8 in which the battery unit 6 is housed, so that the battery unit 6 can be protected from wind, rain, and sunlight.

Furthermore, according to the mounting structure for the battery unit 6 according to the embodiment of the present disclosure, the battery unit 6 is equipped with input/output lines (control harness 25) connected to the engine 1 or equipment provided on the work machine via the connection couplers 24, 63, and is equipped with a power line (first power line) 641 for supplying electricity from the battery unit 6 to the starter motor 3 (starter motor relay 4) via the starter motor power supply terminal 64. This allows the battery unit 6 to be easily stored in the case 8, and the battery unit 6 to be easily removed from the case 8.

Furthermore, according to the mounting structure of the battery unit 6 according to the embodiment of the present disclosure, by removing the battery unit 6 from the case 8 and attaching a power line (second power line) for supplying electricity for charging from an external power source to the external charging input terminal 66, electricity for charging is supplied from the external power source to the battery unit 6. The battery unit 6 is then charged by the electricity supplied from the external power source.

In addition, according to the mounting structure of the battery unit 6 according to the embodiment of the present disclosure, by removing the battery unit 6 from the case 8 and attaching a charging input terminal provided on the portable device to the charging output terminal 67, electricity is supplied from the battery unit 6 to the portable device. The portable device is then operated or charged by the electricity supplied from the battery unit 6 to the portable device.

Furthermore, according to the mounting structure of the battery unit 6 in the embodiment of the present disclosure, the cover 9 has a window 9b that allows the indicator 68 to be viewed, and therefore the remaining charge of the battery unit 6 can be known by viewing the indicator 68 through the window 9b.

The present invention is not limited to the above-described embodiment, and includes modifications to the above-described embodiment and appropriate combinations of these modifications.
For example, in the above-described embodiment, the engine switch 21 and the engine start operation switch 22 are provided on the side of the engine 1 , but they may be provided on the front surface of the battery unit 6 .

The contents described in each of the above embodiments can be understood, for example, as follows:

The mounting structure of the battery unit (6) according to the aspect of [1] is as follows:
A box-shaped case (8) attached to the engine (1) or a working machine on which the engine (1) is mounted;
a battery unit (6) housed in the case (8) and serving as a power supply source for a starter motor (3) provided in the engine (1);
a cover (9) for closing an opening of the case (8) in which the battery unit (6) is housed;
Equipped with.

According to the mounting structure for the battery unit (6) disclosed herein, the cover (9) covers the opening of the case (8) in which the battery unit (6) is housed, thereby protecting the battery unit (6) from wind, rain, and sunlight.

[2] A mounting structure for a battery unit (6) according to another aspect is the mounting structure for the battery unit (6) according to [1],
The battery unit (6) comprises:
a wiring coupler (24, 63) capable of connecting and disconnecting input/output lines connected to a device provided on the engine (1) or the work machine;
a starter motor power supply terminal (64) to which a first power line (641) for supplying electricity from the battery unit (6) to the starter motor (3) can be attached and detached;
Prepare.

According to this configuration, the battery unit (6) is equipped with input/output lines connected to the engine (1) or equipment provided on the work machine via the wiring coupler (24, 63), and is equipped with a first power line (641) for supplying electricity from the battery unit (6) to the starter motor (3) via the starter motor power supply terminal (64). This allows the battery unit (6) to be easily stored in the case (8) and can also be easily removed from the case (8).

[3] A mounting structure for a battery unit 6 according to yet another aspect is a mounting structure for a battery unit (6) according to [1] or [2],
The battery unit (6) comprises:
The battery unit (6) is provided with an external charging input terminal (66) to which a second power line can be attached and detached for supplying electricity for charging the battery unit (6) from an external power source.

According to this configuration, by removing the battery unit (6) from the case (8) and attaching a second power line for supplying electricity for charging from an external power source to the external charging input terminal (66) , electricity for charging is supplied from the external power source to the battery unit (6). Then, the battery unit (6) is charged by the electricity supplied from the external power source.

[4] A mounting structure for a battery unit (6) according to yet another aspect is a mounting structure for a battery unit (6) according to any one of [1] to [3],
The battery unit (6) comprises:
The portable device is provided with a charging output terminal (67) to which a charging input terminal provided on the portable device can be attached or detached.

According to this configuration, by removing the battery unit (6) from the case (8) and attaching a charging input terminal provided on the portable device to the charging output terminal (67), electricity is supplied from the battery unit (6) to the portable device. The portable device is then operated or charged by the electricity supplied from the battery unit (6) to the portable device.

[5] A mounting structure for a battery unit (6) according to yet another aspect is a mounting structure for a battery unit (6) according to any one of [1] to [4],
The battery unit (6) is provided with an indicator (68) for displaying a remaining charge of the battery unit (6);
The cover (9) has a window (9b) through which the indicator (68) is visible.

With this configuration, the remaining charge of the battery unit (6) can be known by visually checking the indicator (68) through the window (9b).

The battery unit (6) according to the present disclosure includes:
A battery unit (6) that is detachably stored in a case-like portion provided on an engine (1) or a working machine on which the engine (1) is mounted,
the battery unit (6) has a starter motor power supply terminal (64) for supplying drive power to a starter motor (3) disposed on the engine (1) or a working machine on which the engine (1) is mounted,
The starter motor power supply terminal (64) is detachable from the starter motor (3),
The battery unit (6) has a wiring coupler (63) that supplies drive power to a drive device of the engine (1), including a relay (battery protection relay 65) that turns on/off the power supply to the starter motor (3),
The wiring coupler (63) is detachable from the driving device side.
Battery unit.

With this configuration, by attaching the wiring coupler (24) on the drive equipment side to the wiring coupler (63), drive power can be supplied to the drive equipment of the engine (1).

LIST OF REFERENCE NUMERALS 1 Engine 12 Recoil starter 121 Starter grip 13 Charge coil 14 Regulator 15 Ignition coil 16 Spark plug 21 Engine switch 22 Engine start operation switch 23 Switch for external device 231 Choke changeover switch 24 Wiring coupler 25 Control harness 251 Engine charging input line 252 Engine switch operation detection line 253 Engine start operation detection line 254 Starter motor relay control line 255 Valve device output line 256 Battery voltage constant application line 3 Starter motor 4 Starter motor relay 41 Contact 5 External device 51 Valve control unit 52 Choke valve 6 Battery unit 6a Protrusion 6b Cushioning material 61 Battery pack 611 Battery cell 62 Housing 62a Protrusion 63 Wiring coupler 64 Starter motor power supply terminal 641 Power line (first power line)
642 Fuse 65 Battery protection relay 66 External charging input terminal 67 Charging output terminal 671 USB output terminal 68 Indicator 69 Charge remaining amount check button 7 Starting control device 71 Control ECU
711 Protection circuit 712 Engine charging input terminal 713 Power supply detection terminal 714 Engine start operation detection terminal 715 Starter motor relay control terminal 716 External device output terminal 717 Constant voltage output terminal 8 Case 9 Covers 9a, 9b Window 91 Bolt

Claims (5)

A box-shaped case attached to the engine or a work machine on which the engine is mounted;
a battery unit housed in the case and serving as a power supply source for a starter motor provided in the engine;
a box-shaped cover having an opening on one side, the cover being assembled with the case so as to be inserted therein to close the opening of the case in which the battery unit is housed;
Equipped with
the battery unit includes a wiring coupler capable of connecting and disconnecting input/output lines connected to a device provided in the engine or the work machine,
The case has an accommodation area for accommodating the battery unit and a connection space for the wiring coupler, the battery unit mounting structure. 2. The battery unit mounting structure according to claim 1 , wherein the battery unit includes a starter motor power supply terminal to which a first power line for supplying electricity from the battery unit to the starter motor can be detached. The battery unit includes:
3. The battery unit mounting structure according to claim 1, further comprising an external charging input terminal to which a second power line for supplying charging electricity from an external power source to the battery unit can be detached. The battery unit includes:
4. The battery unit mounting structure according to claim 1, further comprising a charging output terminal to which a charging input terminal provided on the portable device can be detached. the battery unit includes an indicator that displays a remaining charge of the battery unit;
The cover has a window through which the indicator is visible.
The battery unit mounting structure according to any one of claims 1 to 4.

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