Batteries for work vehicles and work vehicles

Abstract

To provide a battery for a work vehicle which achieves improvement of versatility to be easily applied to an application mounted on a work vehicle.SOLUTION: A battery 50 for a work vehicle is used as a power source of a work vehicle and includes: modules 53 each including multiple battery cells 51 and a module case 52 which houses the battery cells 51; and a battery case 60 in which the multiple modules 53 are housed. In the battery case 60, through holes 67 for drawing electric wiring are disposed on a pair of facing side walls.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a battery for a work vehicle and a work vehicle.

Background Art

[0002] There is known a technique of mounting a battery case formed in a box shape so that a plurality of batteries can be housed inside a work vehicle and having an opening for a hose on a side wall (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a battery for a work vehicle, a lithium-ion battery has a configuration of a cell which is the minimum unit of the battery and a module which is an aggregate of cells. Depending on the mounted application of the work vehicle, a plurality of modules may be electrically connected to form a battery pack. However, usually, depending on the mounted application of the work vehicle, a large case capable of housing a plurality of modules is individually designed. For this reason, for each model of the work vehicle, labor and cost for strength design and quality confirmation of the case are required. As a result, when electrifying the work vehicle, it is not easy to expand the model series.

[0005] An aspect of the present invention aims to enhance versatility and be easily applicable to the mounted applications of work vehicles.

Means for Solving the Problems

[0006] According to this disclosure, a battery for a work vehicle, which is a power source for a work vehicle, is provided, comprising a module having a plurality of battery cells and a module case housing the plurality of battery cells, and a battery case housing a plurality of the modules, wherein the battery case has holes for drawing out electrical wiring in a pair of opposing side walls.

[0007] A work vehicle is provided, comprising the above-mentioned work vehicle battery and a vehicle frame on which the work vehicle battery is located, wherein the work vehicle battery is located at the rear of the vehicle frame. [Effects of the Invention]

[0008] According to this disclosure, versatility can be increased and it can be easily applied to applications mounted on work vehicles. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a side view of the forklift according to the first embodiment, as seen from the left. [Figure 2] Figure 2 is a plan view showing the battery for the work vehicle installed on the forklift. [Figure 3] Figure 3 is an exploded perspective view of the work vehicle battery, seen from the right rear. [Figure 4] Figure 4 is a perspective view from the front left of an example of the battery arrangement for a work vehicle. [Figure 5] Figure 5 is a perspective view from the front left of another example of the battery arrangement for a work vehicle. [Figure 6] Figure 6 is a side view of the shovel in the second embodiment, seen from the left. [Figure 7] Figure 7 is a plan view showing the battery for the work vehicle located on the excavator. [Figure 8] Figure 8 is a perspective view from the front left of another example of the battery arrangement for a work vehicle. [Figure 9]Figure 9 is a perspective view from the right rear of another example of the battery arrangement for a work vehicle. [Figure 10] Figure 10 is a perspective view from the front left of another example of the battery arrangement for a work vehicle. [Modes for carrying out the invention]

[0010] The following describes embodiments of the present invention with reference to the drawings, but the present invention is not limited thereto. The components of the embodiments described below can be combined as appropriate. In addition, some components may not be used.

[0011] (First Embodiment) [forklift] Figure 1 is a side view of a forklift according to the first embodiment, viewed from the left. Figure 2 is a plan view showing a battery for a work vehicle located on the forklift. In this embodiment, the work vehicle 1 is the forklift 1. The forklift 1 is a battery-powered forklift driven by electricity from a battery for a work vehicle (hereinafter referred to as "battery") 50.

[0012] In the following description, the forklift 1 has its front end on the side where forks (not shown) are located, and its rear end on the side where counterweights (not shown) are located. In this embodiment, left and right refer to left and right relative to the front. The left and right direction is the width direction of the vehicle body 10 as the main body of the forklift 1. The upper direction is perpendicular to the plane (ground plane) that contacts at least three of the front wheels 21 and rear wheels 22, and is the side that moves from the ground plane toward the rotation axis of the front wheels 21 or rear wheels 22. The lower direction is the side that moves from the rotation axis of the front wheels 21 or rear wheels 22 toward the ground plane. The axis that moves in the front-rear direction of the vehicle body 10 and passes through the center of the vehicle body 10 in the width direction is called the front-rear axis, and the axis that is perpendicular to the front-rear axis, parallel to the installation plane, and moves toward the vehicle width direction of the vehicle body 10 is called the left-right axis. The axis that moves in the up-down direction of the vehicle body 10 is called the up-down axis. The up-down axis is perpendicular to both the front-rear axis and the left-right axis. The front-rear axis is the X-axis, the up-down axis is the Y-axis, and the left-right axis is the Z-axis.

[0013] The vehicle body 10 has a frame 11. Front wheels 21 are respectively arranged at the left and right ends in front of the vehicle body 10, and rear wheels 22 are respectively arranged at the left and right ends behind the vehicle body 10.

[0014] A counterweight (not shown) is arranged at the rear end of the vehicle body 10. Although the forklift 1 is described as a counterbalance forklift, it is not limited thereto. The counterweight is a weight for achieving balance when the forks support a load.

[0015] The rear end of the forklift 1 has a narrower width at the central part in the left - right direction.

[0016] [Battery] The battery 50 is the power source of the forklift 1. The battery 50 is a rechargeable battery. The battery 50 is, for example, a nickel - hydrogen battery, a lithium - ion battery, or the like.

[0017] The battery 50 is arranged at the rear part of the forklift 1. The battery 50 is arranged below the rear of the vehicle body 10.

[0018] Figure 3 is an exploded perspective view of the battery for a work vehicle as seen from the right rear. Each direction shown in Figure 3 is the direction in an example of the arrangement of the battery 50 mounted on the forklift 1. The battery 50 includes a module 53 having a plurality of battery cells 51 and a module case 52 housing the plurality of battery cells 51, and a battery case 60 housing the plurality of modules 53. In Figure 3, for the sake of explanation, a part of the module case 52 of some modules 53 and a part of the battery case 60 are not shown.

[0019] The battery case 60 is formed in a box shape. The battery case 60 comprises a side wall 61 facing left, a side wall 62 facing right, a side wall 63 facing rear, a side wall 64 facing front, a bottom 65 facing downward, and a lid 66 facing upward (see Figure 4). The side walls 61, 62, 63, 64, bottom 65, and lid 66 are formed from sheet metal. The side walls 61, 62, 63, 64, and bottom 65 are formed as a single unit. Multiple modules 53 are housed in the space enclosed by the side walls 61, 62, 63, 64, and bottom 65. The lid 66 is fixed above the side walls 61, 62, 63, and 64. The space enclosed by the side walls 61, 62, 63, 64 and the bottom 65 is covered and closed by the lid 66. The battery case 60 configured in this way has dustproof and waterproof performance.

[0020] Side wall 61 is connected to the left end of side wall 63, the left end of side wall 64, and the left end of bottom 65. Side wall 62 is connected to the right end of side wall 63, the right end of side wall 64, and the right end of bottom 65. Side wall 63 is connected to the rear end of side wall 61, the rear end of side wall 62, and the rear end of bottom 65. Side wall 64 is connected to the front end of side wall 61, the front end of side wall 62, and the front end of bottom 65. Bottom 65 is connected to the lower end of side wall 61, the lower end of side wall 62, the lower end of side wall 63, and the lower end of side wall 64.

[0021] The cover portion 66 is detachably positioned at the upper ends of the side walls 61, 62, 63, and 64. The cover portion 66 is fixed by inserting bolts (not shown) through holes 73 provided in the upper ends of the side walls 61, 62, 63, and 64, and holes (not shown) provided in the cover portion 66, with the holes 73 being aligned. A sealing material (not shown) is provided at the upper ends of the side walls 61, 62, 63, 64, and the periphery of the cover portion 66.

[0022] Side walls 61 and 62 face each other as a pair. Side walls 61 and 62 are a pair of side walls. Side walls 63 and 64 face each other as a pair. Side walls 63 and 64 are another pair of side walls. Side walls 61 and 62 are adjacent to side walls 63 and 64. The bottom portion 65 and the lid portion 66 face each other as a pair.

[0023] Side walls 61 and 62 are shorter in the longitudinal direction than side walls 63 and 64. The battery case 60 is shorter in the front-to-back direction than in the left-to-right direction.

[0024] The side wall 64 is formed in a planar shape. The lid portion 66 is formed in a planar shape.

[0025] Through-holes 67 for routing electrical wiring are provided in side walls 61 and 62. Through-holes 67 are not provided in side walls 63 and 64, the bottom 65, and the lid 66.

[0026] The through-hole 67 penetrates both the side wall 61 and the side wall 62. The through-hole 67 located in the side wall 61 and the through-hole 67 located in the side wall 62 are configured similarly. Here, referring to Figure 3, the explanation will use the through-hole 67 located in the side wall 62 as an example, and the explanation of the configuration of the through-hole 67 located in the side wall 61 will be omitted. The through-hole 67 is located at the rear upper part of the side wall 62. The through-hole 67 penetrates the side wall 62. In this embodiment, two through-holes 67 are provided. Cables for electrically connecting the batteries 50 are passed through the through-hole 67. The through-hole 67 has dustproof and waterproof properties.

[0027] Rib portions 68 are provided on the side walls 61 and 62, which have the function of reinforcing the battery case 60 and connecting the battery cases 60 together. The rib portions 68 on the side wall 61 and the rib portions 68 on the side wall 62 are configured similarly. Here, referring to Figure 3, we will explain using the rib portion 68 on the side wall 62 as an example, and will omit the explanation of the configuration of the rib portion 68 on the side wall 61.

[0028] The rib portion 68 is positioned in front of the through hole 67 in the side wall 62. The rib portion 68 reinforces the battery case 60. The rib portion 68 is used when connecting battery cases 60 together. The rib portion 68 is formed integrally with the side wall 62. The rib portion 68 comprises a rib body portion 681, a rib body portion 682, a leg portion 683, and a leg portion 684. The rib body portion 681, the rib body portion 682, the leg portion 683, and the leg portion 684 are formed integrally.

[0029] The rib body portions 681 and 682 extend in the vertical direction. The rib body portions 681 and 682 are spaced apart in the front-rear direction. The rib body portion 681 is located in front of the side wall 62. The rib body portion 682 is located in the middle of the side wall 62 in the front-rear direction.

[0030] Leg portion 683 protrudes outward in the left-right direction from the lower end of the side wall 62. Leg portion 683 is connected to the lower end of the rib body portion 681 and the lower end of the rib body portion 682. Leg portion 684 protrudes outward in the left-right direction from the upper end of the side wall 62. Leg portion 684 is connected to the upper end of the rib body portion 681 and the upper end of the rib body portion 682. Leg portions 683 and 684 face each other. Through holes 685 are provided in leg portion 683. In this embodiment, two through holes 685 are provided in leg portion 683, spaced apart in the front-rear direction. The through holes 685 penetrate leg portion 683. Through holes 686 are provided in leg portion 684. In this embodiment, two through holes 686 are provided in leg portion 684, spaced apart in the front-rear direction. The through holes 686 penetrate leg portion 684.

[0031] The legs 683 and through-holes 685 are used when another battery case 60 is stacked on top of the battery case 60 shown in Figure 3. More specifically, the through-holes 685 are aligned with the through-holes 686 of the legs 684 of the other battery case 60, and bolts (not shown) are inserted through them to connect the two battery cases 60. The lower surface of the legs 683 and the upper surface of the legs 684 of the other battery case 60 are in surface contact.

[0032] The legs 684 and through-holes 686 are used when another battery case 60 is stacked on top of the battery case 60 shown in Figure 3. More specifically, the through-holes 686 are aligned with the through-holes 685 of the legs 683 of the other battery case 60, and bolts (not shown) are inserted through them to connect the two battery cases 60. The upper surface of the legs 684 and the lower surface of the legs 683 of the other battery case 60 are in surface contact.

[0033] The side wall 63 is provided with a protrusion 69 capable of housing at least one module 53. The protrusion 69 is located in the center of the side wall 63 in the left-right direction. The protrusion 69 projects outward from the side wall 63 in the front-rear direction. The protrusion 69 is formed integrally with the side wall 63.

[0034] A rib portion 71 is positioned to the left of the protrusion 69. The rib portion 71 reinforces the battery case 60. The rib portion 71 is integrally formed with the side wall 63 and the protrusion 69. The rib portion 71 comprises a rib body portion 711, leg portions 712 and 713. The rib body portion 711, leg portions 712 and 713 are integrally formed. The rib body portion 711 extends in the vertical direction. The rib body portion 711, leg portions 712 and 713 protrude outward in the front-rear direction from the side wall 63.

[0035] Leg portion 712 protrudes outward in the front-rear direction from the lower end of the side wall 63. Leg portion 712 is connected to the lower end of the rib body portion 711. Leg portion 713 protrudes outward in the front-rear direction from the upper end of the side wall 63. Leg portion 713 is connected to the upper end of the rib body portion 711. Leg portions 712 and 712 face each other. A through hole 714 is provided in leg portion 712. The through hole 714 penetrates leg portion 712. A through hole 715 is provided in leg portion 713. The through hole 715 penetrates leg portion 713.

[0036] A rib portion 72 is positioned to the right of the protrusion 69. The rib portion 72 reinforces the battery case 60. The rib portion 72 is integrally formed with the side wall 63 and the protrusion 69. The rib portion 72 comprises a rib body portion 721, leg portions 722 and 723. The rib body portion 721, leg portions 722 and 723 are integrally formed. The rib body portion 721 extends in the vertical direction. The rib body portion 721, leg portions 722 and 723 protrude outward in the front-rear direction from the side wall 63.

[0037] Leg portion 722 protrudes outward in the front-rear direction from the lower end of the side wall 63. Leg portion 722 is connected to the lower end of the rib body portion 721. Leg portion 723 protrudes outward in the front-rear direction from the upper end of the side wall 63. Leg portion 723 is connected to the upper end of the rib body portion 721. Leg portions 722 and 723 face each other. A through hole 724 is provided in leg portion 722. The through hole 724 passes through leg portion 722. A through hole 725 is provided in leg portion 723. The through hole 725 passes through leg portion 723.

[0038] The batteries 50 configured in this way are installed in the work vehicle 1, either individually or in combination, depending on the application of the forklift 1. An example of the arrangement of batteries 50 installed in the forklift 1 is described below.

[0039] [Example of battery placement for forklifts 1] An example of the battery arrangement 50 will be explained using Figure 4. Figure 4 is a perspective view from the left front of an example of the battery arrangement for a work vehicle. The wiring shown in Figure 4 is an example and is not limited to it. In the example shown in Figure 4, two batteries 50 are arranged front to back. The two batteries 50 are called a battery unit 50U. In the example shown in Figure 4, the battery unit 50U comprises two batteries 50. The two batteries 50 are arranged with their side walls 64 facing each other. Since the side walls 64 are planar, the side walls 64 of the battery cases 60 are in contact with each other over a surface. The two batteries 50 are electrically connected in series by wiring 101 and wiring 102.

[0040] The battery unit 50U is placed on a base 81 and then on the frame 11 (see Figure 2) of the forklift 1. The base 81 is formed in the shape of a plate. The battery unit 50U is fixed to the base 81 by bolts 83 inserted through through holes 685 (see Figure 3) in the rib portion 68 of the battery case 60 and through holes (not shown) provided in the base 81. The battery unit 50U is fixed to the base 81 by bolts 84 inserted through through holes 714 (see Figure 3) in the rib portion 71 of the battery case 60 and through holes (not shown) provided in the base 81. The battery unit 50U is fixed to the base 81 by bolts 85 inserted through through holes 724 (see Figure 3) in the rib portion 72 of the battery case 60 and through holes (not shown) provided in the base 81. In this way, the battery unit 50U is fixed to the base 81.

[0041] The battery unit 50U has a protrusion 69 of the battery case 60 positioned at the front, and a protrusion 69 of the battery case 60 positioned at the rear. The protrusion 69 of the battery case 60 positioned at the rear is located in the part of the rear end of the forklift 1 where the width in the left-right direction is narrowed.

[0042] A support plate 82 is placed above the battery unit 50U. The support plate 82 is formed in the shape of a plate. A storage case 100 for housing safety circuits and the like is placed on the support plate 82.

[0043] The storage case 100 is formed in a box shape. The storage case 100 houses, for example, a fuse and a contactor (not shown). The storage case 100 and the battery unit 50U are electrically connected by wiring 103.

[0044] The storage case 100 is connected to two charging ports 110. Power is supplied to the charging circuit inside the storage case 100 via the charging ports 110, and the battery 50 of the battery unit 50U is charged. The charging ports 110 are located at the rear end of the forklift 1.

[0045] [Example of battery placement for forklifts, Part 2] Figure 5 illustrates another example of the battery arrangement 50. Figure 5 is a perspective view from the left front of another example of the battery arrangement for a work vehicle. In the example shown in Figure 5, four batteries 50 are combined. Two batteries 50 are stacked in two layers, with the side walls 64 of the battery case 60 facing each other. The four batteries 50 are electrically connected in series. In Figure 5, some of the wiring is not shown. The four batteries 50 are called a battery unit 50U. In the example shown in Figure 5, the battery unit 50U comprises four batteries 50.

[0046] The method of fixing the battery unit 50U, the base 81, and the frame 11 of the forklift 1 is the same as in arrangement example 1.

[0047] The batteries 50 are stacked in two layers, with the upper battery case 60 and the lower battery case 20 stacked in the same orientation. The through-hole 685 (see Figure 3) of the leg portion 683 of the upper battery case 60 and the through-hole 686 (see Figure 3) of the leg portion 684 of the lower battery case 60 are aligned and secured with bolts 87. The through-hole 714 (see Figure 3) of the leg portion 712 of the upper battery case 60 and the through-hole 715 (see Figure 3) of the leg portion 713 of the lower battery case 60 are aligned and secured with bolts 85. The through-hole 724 (see Figure 3) of the leg portion 722 of the upper battery case 60 and the through-hole 725 (see Figure 3) of the leg portion 723 of the lower battery case 60 are aligned and secured with bolts 84.

[0048] In the example shown in Figure 5, the storage case 100 is positioned above the battery case 60 at the rear of the upper section of the battery unit 50U.

[0049] [effect] As described above, through-holes 67 for routing electrical wiring are provided in the side walls 61 and 62, while through-holes are not provided in the side walls 63 and 64, the bottom 65, and the lid 66. According to this embodiment, the battery case 60 can have dustproof and waterproof performance.

[0050] According to this embodiment, the battery case 60 is provided with rib portions 68 on side walls 61 and 62, and with protrusions 69 and rib portions 71 and 72 on side wall 63. This embodiment can improve the strength of the battery case 60.

[0051] In contrast, conventional large cases capable of housing the required number of modules 53 have large sealing surfaces, making it difficult to achieve high dimensional accuracy. Therefore, it was difficult to create a waterproof and dustproof structure. Furthermore, it was difficult to incorporate a rib structure to ensure strength in large cases.

[0052] According to the embodiment, a module 53, each containing a module case 52 with multiple battery cells 51, is housed in multiple battery cases 60 to form a single unit of the battery 50. In this embodiment, since the side walls 64 are formed in a planar shape, the side walls 64 of two battery cases 60 can be placed facing each other and combined in surface contact. According to this embodiment, even if the mounting application of the forklift 1 is different, the battery 50 can be used as a single unit by combining one or more units. In this way, the embodiment can be made more versatile and easily applicable to mounting applications of work vehicles.

[0053] In contrast, conventionally, a large case capable of housing the required number of modules 53 was designed for each application of the forklift 1. This meant that the strength design of the case had to be done separately for each model of forklift 1, increasing costs and effort.

[0054] In this embodiment, side walls 61 and 62 are shorter in the longitudinal direction than side walls 63 and 64. In this embodiment, a protrusion 69 is provided on side wall 63. According to this embodiment, the protrusion 69 of the battery case 60 can be positioned in the narrower portion at the rear end of the forklift 1. In this embodiment, the battery 50 can be efficiently mounted in the limited space at the rear end of the forklift 1.

[0055] (Second Embodiment) [Shovel] Figure 6 is a side view of the shovel in the second embodiment, viewed from the left. Figure 7 is a plan view showing the battery for the work vehicle located on the shovel. In this embodiment, the work vehicle 1 is assumed to be the shovel 1. The shovel 1 is a battery-powered shovel driven by electricity from the battery 50.

[0056] In the following, the side of the shovel 1 where the work implement (not shown) is located is the front, and the side where the exterior is located is the rear. In this embodiment, left and right refer to left and right with respect to the front. The left and right direction is the width direction of the vehicle body 10 as the main body of the shovel 1. Downward is the direction perpendicular to the plane that contacts the track 25 (ground contact plane) and toward the ground from the ground contact plane. Upward is the opposite direction of downward.

[0057] The vehicle body 10 has a frame 11.

[0058] The battery 50 is located at the rear of the shovel 1. The battery 50 is positioned at the lower rear of the vehicle body 10.

[0059] The rear end of the shovel has an arc shape corresponding to the turning radius.

[0060] [Example of battery placement for an excavator 1] Figures 8 and 9 illustrate another example of the battery arrangement 50. Figure 8 is a perspective view of another example of the battery arrangement for a work vehicle, viewed from the front left. Figure 9 is a perspective view of another example of the battery arrangement for a work vehicle, viewed from the rear right. In the example shown in Figures 8 and 9, two batteries 50 are stacked vertically. The upper battery case 60 and the lower battery case 20 are stacked in the same orientation. The two batteries 50 are electrically connected in series. In Figures 8 and 9, some of the wiring is omitted from the illustration. The two batteries 50 are referred to as a battery unit 50U. In the example shown in Figures 8 and 9, the battery unit 50U comprises two batteries 50. The protrusion 69 of the battery case 60 is located on the arc-shaped portion at the rear end of the shovel.

[0061] A support portion 89 for supporting the storage case 100 is positioned on the side wall 64 of the upper battery case 60. The support portion 89 is formed in an L-shape when viewed from the side. The support portion 89 comprises a side wall 891 extending along the side wall 64 and a bottom portion 892 extending forward from the lower end of the side wall 891. The storage case 100 is placed on the bottom portion 892.

[0062] The two stacked batteries 50 are secured by overlapping the through-holes 685 (see Figure 3) of the legs 683 of the upper battery case 60 with the through-holes 686 (see Figure 3) of the legs 684 of the lower battery case 60 and fastening them with bolts 87. The through-holes 714 (see Figure 3) of the legs 712 of the upper battery case 60 with the through-holes 715 (see Figure 3) of the legs 713 of the lower battery case 60 and fastening them with bolts 85. The through-holes 724 (see Figure 3) of the legs 722 of the upper battery case 60 with the through-holes 725 (see Figure 3) of the legs 723 of the lower battery case 60 and fastening them with bolts 84.

[0063] The battery unit 50U is placed on the base 81F and base 81R, and then placed on the frame 11 of the shovel. The base 81F and base 81R are formed in a plate shape. The battery unit 50U is fixed to base 81F by bolts 83 inserted through through holes 685 (see Figure 3) in the rib portion 68 of the lower battery case 60 and through holes (not shown) provided in base 81F. The battery unit 50U is fixed to base 81R by bolts 85 inserted through through holes 714 (see Figure 3) in the rib portion 71 of the lower battery case 60 and through holes (not shown) provided in base 81R. The battery unit 50U is fixed to base 81R by bolts 84 inserted through through holes 724 (see Figure 3) in the rib portion 72 of the lower battery case 60 and through holes (not shown) provided in base 81R. In this way, the battery unit 50U is fixed onto the bases 81F and 81R.

[0064] [Example of battery placement for excavators 2] Figure 10 illustrates another example of the battery 50's arrangement. Figure 10 is a perspective view from the front left of another example of the battery arrangement for a work vehicle. In the example shown in Figure 10, one battery 50 is arranged. Some of the wiring is omitted from the illustration in Figure 10.

[0065] The method of fixing the battery unit 50U to the base 81F and base 81R to the frame 11 of the shovel 1 is the same as in arrangement example 1.

[0066] [effect] As described above, according to the embodiment, depending on the application on which the shovel 1 is mounted, one or more batteries 50 can be used as a single unit. [Explanation of Symbols]

[0067] 1...Forklift (work vehicle), 10...Body, 11...Frame, 50...Battery, 50U...Battery unit, 51...Battery cell, 52...Module case, 53...Module, 60...Battery case, 61...Side wall, 62...Side wall, 63...Side wall, 64...Side wall, 65...Bottom, 66...Lid, 67...Through hole, 68...Rib section, 681...Rib body section, 682...Rib body section, 683...Leg section, 684...Leg section, 685...Through hole, 686...Through hole, 69...Protrusion, 71...Rib section, 711...Rib body section, 712...Leg section, 713...Leg section, 72...Rib section, 721...Rib body section, 722...Leg section, 723...Leg section, 73...Hole, 100...Storage case, 110...Charging port.

Claims

1. A battery for work vehicles, which is the power source for work vehicles, A module comprising multiple battery cells and a module case housing the multiple battery cells, A battery case containing multiple of the aforementioned modules, Equipped with, The aforementioned battery case is On the opposing side walls, holes are provided for routing electrical wiring. The pair of side walls are provided with ribs that connect the battery cases together. Battery for work vehicles.

2. A support portion for a battery controller is located on the other side wall of the other pair of side walls, other than the aforementioned pair of side walls. A battery for a work vehicle according to claim 1, comprising the features described above.

3. The aforementioned pair of side walls has a shorter longitudinal length than any other pair of side walls. Battery for work vehicles according to claim 1 or 2.

4. A battery for a work vehicle according to any one of claims 1 to 3, The vehicle frame on which the aforementioned work vehicle battery is located, Equipped with, The aforementioned work vehicle battery is located at the rear of the vehicle frame. Work vehicle.

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