Battery pack and work vehicle

Abstract

To provide a battery pack for use in a work vehicle, which allows easy access to an electrical equipment storage chamber in which electrical equipment is stored and improves the ease of maintenance of the electrical equipment.SOLUTION: A battery pack 70 includes a battery module 73, electrical components 74, and a housing 71 that houses the battery module 73 and the electrical components 74. The housing 71 has an electrical component housing chamber 72 that houses the electrical component 74, and the electrical component housing chamber 72 has an opening 72a that allows access to the electrical component housing chamber 72 from the outside and a maintenance cover 75 that is configured to be able to cover the opening 72a, and the maintenance cover 75 is attached to the housing 71 by a hinge.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a battery pack and a work vehicle. [Background technology]

[0002] In the field of work vehicles such as construction machinery, work vehicles that operate and travel using electric motors are becoming more common. Work vehicles that operate and travel using electric motors are equipped with a battery pack as a power source for the electric motor.

[0003] 7 is a diagram illustrating a battery pack 970 mounted on a work vehicle described in Patent Document 1. The battery pack 970 includes a sealed battery case 971 made up of a front case portion 971a and a rear case portion 971b, a horizontal partition wall 975 that vertically divides the interior of the front case portion 971a into a first space S901 and a second space S902 and vertically divides the interior of the rear case portion 971b into a third space S903 and a fourth space S904, an electrical unit 974, and a battery module 973.

[0004] The electrical unit 974 is accommodated in one of the first space S901, the second space S902, the third space S903, and the fourth space S904, and the battery module 973 is accommodated in the remaining space among the first space S901, the second space S902, the third space S903, and the fourth space S904 that does not accommodate the electrical unit 974.

[0005] The battery pack 970 can keep the temperature of the space inside the battery case 971 uniform while preventing foreign matter from entering from the outside, and can operate each battery module efficiently. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-91963 Summary of the Invention [Problem to be solved by the invention]

[0007] However, it is difficult to say that the battery pack 970 described in Patent Document 1 has been given sufficient consideration regarding maintenance of the electrical unit 974 disposed inside the housing of the battery pack 970.

[0008] That is, the electrical unit 974 is housed in the battery case 971, which is an enclosed space, and the battery pack 970 is located in a position extending from where the rear wheels of the work vehicle are located to the rear end of the work vehicle. Therefore, the rear wheels are an obstacle when performing maintenance on the electrical unit 974 while it is still on the work vehicle. For this reason, it has been necessary to remove the battery pack from the work vehicle before performing maintenance work.

[0009] It is cumbersome to remove the battery pack from the work vehicle every time maintenance is performed on the electrical unit, and then to load the battery pack back onto the work vehicle after the maintenance work is completed.

[0010] The present invention has been made in consideration of such problems, and aims to provide a battery pack that allows easy access to the electrical equipment storage chamber (electrical equipment unit) in which the electrical equipment is housed and improves the maintainability of the electrical equipment, as well as to provide a work vehicle equipped with such a battery pack. [Means for solving the problem]

[0011] [1] A battery pack according to the present disclosure includes a battery module, an electrical component, and a housing that houses the battery module and the electrical component. The housing has an electrical component housing chamber that houses the electrical component. The electrical component housing chamber has an opening that allows access to the electrical component housing chamber from the outside, and a maintenance cover that is configured to be able to cover the opening. The maintenance cover is attached to the housing by a hinge.

[0012] [2] In the battery pack of the present disclosure, it is preferable that the electrical equipment includes a fuse or a contactor, and that the electrical equipment is arranged on a surface of the maintenance cover facing the electrical equipment storage chamber.

[0013] [3] In the battery pack of the present disclosure, it is preferable that the electrical equipment includes a board on which an integrated circuit is mounted, and that the board is disposed on a wall of the electrical equipment housing chamber.

[0014] [4] In the battery pack of the present disclosure, it is preferable that, when the battery pack is placed on a work vehicle, the maintenance cover is positioned at a position higher than the lower end of the opening formed when the battery cover is opened on the work vehicle.

[0015] [5] The work vehicle of the present disclosure includes a battery pack having a battery module, electrical equipment, and a housing that houses the battery module and the electrical equipment. The housing has an electrical equipment storage compartment that houses the electrical equipment. The electrical equipment storage compartment has an opening that allows access to the electrical equipment storage compartment from the outside, and a maintenance cover that is configured to be able to cover the opening. The maintenance cover is attached to the housing by a hinge. [Effects of the Invention]

[0016] The battery pack for a work vehicle of the present invention includes an electrical equipment storage compartment that stores electrical equipment. The electrical equipment storage compartment has an opening that allows access to the electrical equipment storage compartment from the outside, and a maintenance cover that is configured to cover the opening. This allows maintenance of the electrical equipment stored in the electrical equipment storage compartment to be performed without removing the battery pack from the work vehicle. The maintenance cover is also attached to the housing by a hinge. Therefore, there is no need to prepare a place to store the maintenance cover while the maintenance cover is open. The battery pack for a work vehicle of the present invention allows easy access to the electrical equipment storage compartment, making it possible to provide a battery pack for use in a work vehicle that improves the ease of maintenance of electrical equipment.

[0017] The work vehicle of the present invention includes a battery pack having an electrical equipment compartment that houses electrical equipment. The electrical equipment compartment has an opening that allows access to the electrical equipment compartment from the outside, and a maintenance cover that is configured to cover the opening. This allows maintenance of the electrical equipment housed in the electrical equipment compartment to be performed without removing the battery pack from the work vehicle. The maintenance cover is also attached to the housing by a hinge. Therefore, there is no need to prepare a place to store the maintenance cover while the maintenance cover is open. The work vehicle battery pack of the present invention makes it possible to provide a work vehicle that allows easy access to the electrical equipment unit and improves the maintainability of the electrical equipment unit. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a diagram shown to explain a work vehicle 1 equipped with a battery pack 70 according to an embodiment. [Figure 2] FIG. 2 is a diagram used to explain the work vehicle 1 equipped with the battery pack 70 according to the embodiment, showing the battery cover 22 in an open state. [Figure 3]FIG. 3 is a diagram for explaining a battery pack 70 according to the embodiment. [Figure 4] FIG. 4 is a diagram for explaining a battery pack 70 according to the embodiment. [Figure 5] FIG. 5 is a conceptual diagram shown to explain the structure of a battery pack 70 according to the embodiment. [Figure 6] FIG. 6 is a diagram for explaining a hinge 76 that can be suitably used in the battery pack 70 according to the embodiment. [Figure 7] FIG. 10 is a diagram for explaining a battery pack 970 mounted on an electric work vehicle according to the prior art. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, modes for carrying out the present invention (hereinafter referred to as "embodiments") will be described. The embodiments described below show preferred modes for carrying out the invention, and do not limit the invention according to the claims. Furthermore, not all of the elements and combinations thereof described in the embodiments are necessarily essential to the present invention.

[0020] A battery pack 70 and a work vehicle 1 according to an embodiment of the present invention will be described below with reference to the drawings. In the embodiment described below, a crawler hydraulic excavator will be used as an example of a work vehicle.

[0021] First, the external configuration of the work vehicle 1 according to the embodiment will be described with reference to Figure 1. Note that the external configuration of the work vehicle 1 according to the embodiment is not the gist of the present invention, and therefore will only be described in outline. Furthermore, in each drawing used to explain the embodiment, components having the same function are given the same reference numerals, and duplicated explanations may be omitted.

[0022] Furthermore, when it is necessary to indicate the left and right, front and rear, and top and bottom of the work vehicle 1 when explaining the work vehicle 1 according to the embodiment, the side of the work vehicle 1 on which the blade 30 is attached will be referred to as the "front", and the side opposite to the side on which the blade 30 is attached will be referred to as the "rear". Furthermore, the left side of the work vehicle 1 when viewed from behind will be referred to as the "left", and the right side of the work vehicle 1 when viewed from behind will be referred to as the "right". Furthermore, the bottom side of the work vehicle 1 will be referred to as the "bottom", and the side opposite the bottom will be referred to as the "top".

[0023] 1. Embodiment 1.1.Work vehicles FIG. 1 is a diagram shown to explain a work vehicle 1 equipped with a battery pack 70 according to an embodiment. Note that FIG. 1 is a perspective view of the work vehicle 1 as seen from the left rear. FIG. 2 is a diagram shown to explain a work vehicle 1 equipped with a battery pack 70 according to an embodiment. Note that FIG. 2 shows a state in which the battery cover 22 of the work vehicle 1 is open, allowing part of the battery pack 70 to be seen. Also, in FIG. 2, the undercarriage 10, blade 30, and working implement 40 are not shown.

[0024] As shown in Figure 1, the work vehicle 1 comprises a lower running body 10, an upper rotating body 20 rotatably mounted on the upper part of the lower running body 10, a blade 30 mounted on the front part of the lower running body 10, and a work device 40 mounted on the front part of the upper rotating body 20.

[0025] The lower traveling body 10 has a pair of left and right crawlers 12 on both the left and right sides of a frame 11. A blade 30 that is capable of swinging up and down is attached to the frame 11. A swivel mechanism (not shown) is provided at approximately the center of the upper part of the frame 11. The swivel mechanism enables the upper rotating body 20 to rotate on a horizontal plane. The lower traveling body 10, upper rotating body 20, blade 30, and working device 40 are each driven by a corresponding hydraulic actuator (hydraulic motor, hydraulic cylinder, etc.).

[0026] The top, rear, left side, right side, and front of the upper rotating body 20 are each covered with a cover, forming an equipment storage space 60 (see FIG. 2) inside. The cover covering the top and rear is referred to as a battery cover 22, and the covers covering the left side, right side, and front are referred to as a left side cover 23, a right side cover 24, and a front cover (not shown), respectively. The equipment storage space 60 is a space surrounded by the battery cover 22, the left side cover 23, the right side cover 24, and the front cover.

[0027] A canopy-type operator's cab 50 is provided above the battery cover 22. The operator's cab 50 is provided with a canopy pole 51, an operator's seat 52, and an operating lever 53. In addition, a counterweight 29 that forms part of the rear surface is provided below the rear surface of the upper rotating body 20.

[0028] The equipment storage space 60 accommodates a battery pack 70. The equipment storage space 60 also accommodates various devices, hydraulic piping, electrical wiring (none of which are shown), and the like required to operate the work vehicle 1. In a small work vehicle 1, the equipment storage space 60 is generally narrow. For this reason, the equipment storage space 60 accommodates various devices, hydraulic piping, electrical wiring, and the like at a high density.

[0029] 1.2.Battery Pack Fig. 3 is a diagram for explaining the battery pack 70 according to the embodiment. Fig. 3 shows the battery pack 70 with the maintenance cover 75 closed. Fig. 4 is a diagram for explaining the battery pack 70 according to the embodiment. Fig. 4 shows the battery pack 70 with the maintenance cover 75 open.

[0030] Fig. 5 is a conceptual diagram shown to explain the structure of the battery pack 70 according to this embodiment. Fig. 5 is a perspective view of the battery pack 70 when it is placed on the work vehicle 1, seen from the right rear of the work vehicle 1, and some of the components arranged inside are shown in perspective.

[0031] 3 to 5, the battery pack 70 includes a battery module 73, electrical components 74, and a housing 71. The battery module 73 and the electrical components 74 are housed in the housing 71.

[0032] 1.2.1. Housing 5, the housing 71 has an internal space S. The space S is divided into three spaces S1, S2, and S3.

[0033] Space S1 is a space located at the top of space S, and is a space located behind the work vehicle 1 when the battery pack 70 is mounted on the work vehicle 1. Space S2 is a space located above space S, and is a space located in front of the work vehicle 1 when the battery pack 70 is mounted on the work vehicle 1. Space S3 is a space located at the bottom of space S.

[0034] The space S1 accommodates electrical equipment 74. The space S1 is surrounded by walls. The space S1 accommodating the electrical equipment 74 constitutes an electrical equipment accommodation chamber 72. The electrical equipment accommodation chamber 72 forms an independent space from the spaces S2 and S3. Hereinafter, the space S1 will be referred to as the electrical equipment accommodation chamber 72.

[0035] As shown in Figures 3 and 4, the electrical equipment storage compartment 72 has an opening 72a and a maintenance cover 75. In Figure 3, the opening 72a is shown by a dotted line because it is located behind the maintenance cover 75 and cannot be seen. The opening 72a allows access to the electrical equipment storage compartment 72 from the outside. Furthermore, when the battery pack 70 is placed on the work vehicle 1, the opening 72a is located at a position corresponding to the opening 27 formed when the battery cover 22 on the work vehicle 1 is opened, and is located at a position higher than the lower end 27a of the opening 27 (see Figure 2). The electrical equipment storage compartment 72 will be described in detail later.

[0036] The space S2 and the space S3 house the battery module 73. A wall may be provided between the space S2 and the space S3, and the spaces S2 and S3 may be formed as independent spaces. Alternatively, the space S2 and the space S3 may be formed as a single space without a partition such as a wall.

[0037] 1.2.2.Maintenance cover The maintenance cover 75 can prevent external access to the electrical equipment housing chamber 72 by closing the maintenance cover 75 and blocking the opening 72a. In addition, the maintenance cover 75 can allow external access to the electrical equipment housing chamber 72 by opening the maintenance cover 75 and opening the opening 72a.

[0038] As shown in Figures 3 to 5, the maintenance cover 75 is configured to be able to cover the opening 72a. Specifically, the maintenance cover 75 has a size that allows it to cover the opening 72a, and is disposed in a position that allows it to cover the opening 72a. The maintenance cover 75 shown in Figures 3 to 5 has a rectangular shape, but the shape of the maintenance cover 75 is not limited to this. As long as it is possible to cover the opening 72a, various shapes such as a circle or a polygon can be used.

[0039] When the battery pack 70 is mounted on the work vehicle 1, the maintenance cover 75 is provided at a position corresponding to the opening 27 that is formed when the battery cover 22 is opened to access the battery pack 70.

[0040] Specifically, the work vehicle 1 is configured so that the battery cover 22 can be opened and closed to perform maintenance work on the battery pack 70. The maintenance cover 75 is disposed at the position of the opening 27 that is formed when the battery cover 22 is opened. This allows the maintenance cover 75 to be opened and closed without removing the battery pack 70 from the work vehicle 1.

[0041] Furthermore, the maintenance cover 75 is disposed at a position higher than the lower end 27a of the opening 27. In the work vehicle 1 according to this embodiment, the lower end 27a of the opening 27 is defined as the upper end of the counterweight 29 (see FIG. 2). The maintenance cover 75 is disposed at a position higher than the upper edge of the counterweight 29, which extends in the vehicle width direction of the work vehicle 1.

[0042] As a result, even if the position where battery pack 70 is placed on work vehicle 1 is lower than lower end 27a of opening 27, electrical equipment storage compartment 72 can be accessed from the outside without removing battery pack 70 from work vehicle 1. As a result, maintenance of electrical equipment 74 stored in electrical equipment storage compartment 72 can be easily performed.

[0043] The battery pack 70 has a seal member 78 disposed at a position where the outer periphery of the opening 72a overlaps with the outer periphery of the maintenance cover 75 when the maintenance cover 75 is closed. Any material can be selected as the seal member 78 as long as it has a predetermined level of rigidity and flexibility. Examples of the seal member 78 include packing and O-rings made of rubber, sponge, urethane, or other materials.

[0044] The sealing member 78 may be disposed on the outer periphery of the opening 72a as shown in FIG. 4, or may be disposed on the outer periphery of the maintenance cover 75, although not shown.

[0045] By providing the sealing member 78, when the maintenance cover 75 is fixed to the housing 71 using the bolts 77, it is possible to prevent a gap from forming between the maintenance cover 75 and the housing 71, thereby preventing water, dust, etc. from entering the electrical equipment storage chamber 72.

[0046] The maintenance cover 75 is attached to the housing 71 by a hinge 76. The maintenance cover 75 according to this embodiment is attached to the housing 71 by the hinge 76 provided on the left side of the maintenance cover 75 when facing the battery pack 70.

[0047] By attaching the maintenance cover 75 to the housing 71 using the hinges 76, the maintenance cover 75 is supported by the housing 71 via the hinges 76. This allows the maintenance cover 75 to be easily opened and closed. Furthermore, while the maintenance cover 75 is being opened to perform maintenance on the electrical components 74, there is no need to prepare a place to store the maintenance cover 75.

[0048] As the hinge 76, for example, a hinge 76 configured with a steel bar 76a, a bracket 76b, and a pin 76c as shown in Fig. 6 can be used. Fig. 6 is a diagram for explaining a hinge 76 that can be suitably used in the battery pack 70 according to the embodiment.

[0049] The square steel 76a has a rectangular prism shape. The square steel 76a has a hole 76d in the height direction of the square prism shape, which is large enough to allow the pin 76c to pass through. The square steel 76a is attached by welding to the periphery of the opening 72a in the housing 71 of the battery pack 70.

[0050] 6, the bracket 76b has a shape in which a square steel bar having holes 76e at both ends of a plate-like member is erected. The pins 76c are inserted into the holes 76e. The bracket 76b is attached to the maintenance cover 75 by welding.

[0051] Pin 76c is a member for connecting square steel 76a and bracket 76b. Pin 76c is inserted through hole 76e in bracket 76b and hole 76d in square steel 76a, connecting square steel 76a and bracket 76b. This allows maintenance cover 75 to be attached to housing 71 in an openable and closable manner.

[0052] The hinge 76 described above is merely one example of a hinge. As long as the maintenance cover 75 can be attached to the housing 71 in an openable and closable manner, any known hinge can be used as the hinge 76.

[0053] The hinge 76 preferably has a predetermined amount of "play." "Play" is also called "rattle." Specifically, when the hinge 76 is assembled, a gap is formed between the steel beam 76a and the bracket 76b, and a gap is also formed between the pin 76c and the hole 76e of the bracket 76b.

[0054] As a result, the brackets 76b are configured to be able to move a predetermined amount relative to the square steel 76a in any of the up-down, front-back, and left-right directions of the work vehicle 1. Therefore, the maintenance cover 75 can move, that is, rattle, relative to the housing 71 in any of the up-down, front-back, and left-right directions.

[0055] The maintenance cover 75 is fixed to the housing 71 by a plurality of bolts 77 that pass through holes (see FIG. 4, reference numerals omitted) provided in the maintenance cover 75. Because the hinges 76 have "play," when the maintenance cover 75 is fixed to the housing 71 by the plurality of bolts 77, the positions of the holes provided in the maintenance cover 75 can be accurately aligned with the positions of screw holes (reference numerals omitted) provided in the housing 71. This allows the maintenance cover 75 to be easily and reliably fixed to the housing 71 using the bolts 77.

[0056] Furthermore, when the seal member 78 is placed at a position where the outer periphery of the opening 72a and the outer periphery of the maintenance cover 75 overlap, if the hinge 76 does not have "play," it may be difficult to accurately align the positions of the holes in the maintenance cover 75 with the positions of the screw holes (reference numerals omitted) in the housing 71. However, by providing "play" to the hinge 76, it is possible to accurately align the positions of the holes in the maintenance cover 75 with the positions of the screw holes in the housing 71. This allows the maintenance cover 75 to be easily and reliably fixed to the housing 71 using the bolts 77.

[0057] The maintenance cover 75 may be provided with accessories such as a service plug 79, a quick charge port 80, etc. on a surface 75a (see Figure 3) that faces the opening 27 of the maintenance cover 75 when the battery pack 70 is placed on the work vehicle 1.

[0058] 1.2.3.Electrical equipment room As described above, the electrical component housing chamber 72 is the space S2 that houses the electrical components 74. Examples of the electrical components 74 housed in the electrical component housing chamber 72 include a fuse 74a, a contactor 74b, and a board 74c on which an integrated circuit is mounted.

[0059] Of the electrical components 74, the fuses 74a and the contactors 74b are arranged on a surface 75b of the maintenance cover 75 that faces the electrical component housing chamber 72 (hereinafter, the "surface 75b that faces the electrical component housing chamber 72" will be referred to as the "inner surface 75b"). The inner surface 72b of the maintenance cover 75 is exposed to the outside of the electrical component housing chamber 72 when the maintenance cover 75 is open, and is a surface that forms part of the inner wall of the electrical component housing chamber 72 when the maintenance cover 75 is closed.

[0060] Of the electrical components 74, the fuses 74a and contactors 74b are the electrical components that require frequent maintenance. By arranging the electrical components 74 that require frequent maintenance on the inner surface 75b of the maintenance cover 75, when performing maintenance on the electrical components 74, the maintenance work can be performed with the fuses 74a and contactors 74b exposed to the outside of the electrical component housing chamber 72. This improves the efficiency of the maintenance work.

[0061] The electrical components 74 arranged on the inner surface 75b of the maintenance cover 75 are connected to terminals provided on the housing 71 side by bendable electrical wiring 74d so as not to interfere with opening and closing the maintenance cover 75. The electrical components 74 arranged on the maintenance cover 75 are attached to the maintenance cover 75 (inner surface 75b of the maintenance cover 75) via an insulating and elastic member such as insulating rubber (not shown).

[0062] Of the electrical equipment 74, the board 74c on which the integrated circuit is mounted is disposed on a wall (reference numeral omitted) of the electrical equipment housing chamber 72, which is a surface different from the inner surface 75b of the maintenance cover 75. As described above, the electrical equipment housing chamber 72 (space S1) is separated from the space S2 and the space S3 by walls in the space S formed inside the housing 71.

[0063] By arranging the board 74c on which the integrated circuit is mounted on the wall of the electrical equipment housing chamber 72, it is possible to make effective use of the space inside the electrical equipment housing chamber 72 while making it possible to access the board 74c during maintenance.

[0064] The effects achieved by the battery pack 70 according to this embodiment will be described below.

[0065] [1] A battery pack 70 according to the embodiment has an electrical component housing chamber 72 that houses electrical components 74. The electrical component housing chamber 72 has an opening 72a and a maintenance cover 75 that is configured to be able to cover the opening 72a. The maintenance cover 75 is attached to the housing 71 by a hinge 76. This allows the maintenance cover 75 to be easily opened and closed. Furthermore, while the maintenance cover 75 is being opened to perform maintenance on the electrical components 74, there is no need to prepare a place to store the maintenance cover 75. In other words, the battery pack 70 according to the embodiment allows easy access to the electrical component housing chamber 72 in which the electrical components 74 are housed, and it is possible to provide a battery pack 70 that improves the ease of maintenance of the electrical components 74.

[0066] [2] In the battery pack 70 according to this embodiment, the electrical components 74 include at least one of a fuse 74a and a contactor 74b. Among the electrical components 74, the fuse 74a and the contactor 74b are the electrical components that require frequent maintenance. The electrical components 74 are disposed on the surface (inner surface 75b) of the maintenance cover 75 that faces the electrical component housing chamber 72. When the maintenance cover 75 is opened, the inner surface 75b of the maintenance cover 75 is exposed to the outside of the electrical component housing chamber 72. This allows the electrical components 74 that require frequent maintenance to be exposed to the outside of the electrical component housing chamber 72, thereby enabling maintenance work to be performed. This improves the efficiency of maintenance work.

[0067] [3] In the battery pack 70 according to the embodiment, the electrical component 74 includes a board 74c on which an integrated circuit is mounted. The electrical component 74 is disposed on a wall (reference numeral omitted) of the electrical component housing chamber 72. This makes it possible to effectively utilize the space inside the electrical component housing chamber 72 and to access the board 74c during maintenance.

[0068] [4] In the battery pack 70 according to this embodiment, when the battery pack 70 is mounted on the work vehicle 1, the maintenance cover 75 is positioned higher than the lower end 27a of the opening 27 that is formed when the battery cover 22 is opened on the work vehicle 1. This allows access to the electrical equipment storage compartment 72 from the outside without removing the battery pack 70 from the work vehicle 1, even when the battery pack 70 is mounted on the work vehicle 1 and the position at which the battery pack 70 is mounted on the work vehicle 1 is lower than the lower end 27a of the opening 27. As a result, maintenance of the electrical equipment 74 housed in the electrical equipment storage compartment 72 can be easily performed.

[0069] [5] The work vehicle 1 according to the embodiment has an electrical equipment storage compartment 72 that stores electrical equipment 74. The electrical equipment storage compartment 72 is equipped with a battery pack 70 that has an opening 72a and a maintenance cover 75 that is configured to be able to cover the opening 72a. The maintenance cover 75 is attached to the housing 71 by a hinge 76. This allows the maintenance cover 75 to be opened and closed easily. Also, while the maintenance cover 75 is being opened to perform maintenance on the electrical equipment 74, there is no need to prepare a place to store the maintenance cover 75. In other words, the work vehicle 1 according to the embodiment allows easy access to the electrical equipment storage compartment 72 that stores the electrical equipment 74, and it is possible to provide a work vehicle 1 equipped with a battery pack 70 that improves the ease of maintenance of the electrical equipment 74.

[0070] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. [Explanation of symbols]

[0071] 1...work vehicle, 27...opening, 27a...lower end of opening, 70...battery pack, 71...casing, 72...electrical equipment storage compartment, 72a...opening, 73...battery module, 74...electrical equipment, 74a...fuse, 74b...contactor, 74c...circuit board, 75...maintenance cover, 76...hinge

Claims

1. A battery pack including a battery module, an electrical component, and a housing that houses the battery module and the electrical component, the housing has an electrical component housing chamber that houses the electrical component, the electrical equipment accommodation chamber has an opening that allows access to the electrical equipment accommodation chamber from the outside, and a maintenance cover that is configured to be able to cover the opening, The battery pack is characterized in that the maintenance cover is attached to the housing by a hinge.

2. 2. The battery pack according to claim 1, the electrical component includes a fuse or a contactor; The battery pack is characterized in that the electrical equipment is arranged on a surface of the maintenance cover facing the electrical equipment housing chamber.

3. 2. The battery pack according to claim 1, the electrical equipment includes a substrate on which an integrated circuit is mounted, The battery pack is characterized in that the circuit board is disposed on a wall of the electrical equipment housing chamber.

4. 2. The battery pack according to claim 1, When the battery pack is placed on a work vehicle, the maintenance cover is positioned at a position higher than a lower end of an opening formed when the battery cover is opened on the work vehicle.

5. a battery pack including a battery module, an electrical component, and a housing that houses the battery module and the electrical component; the housing has an electrical component housing chamber that houses the electrical component, the electrical equipment accommodation chamber has an opening that allows access to the electrical equipment accommodation chamber from the outside, and a maintenance cover that is configured to be able to cover the opening, The work vehicle is characterized in that the maintenance cover is attached to the housing by a hinge.

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