KR-20260063565-A - Battery pack for forklift

KR20260063565AKR 20260063565 AKR20260063565 AKR 20260063565AKR-20260063565-A

Abstract

The present invention relates to a battery pack for a forklift, comprising a rectangular bottom plate (110), a front panel (120), a rear panel (130), a left panel (140), a right panel (150), and an upper cover (160) assembled to the front, rear, left, right, and top sides of the bottom plate (110), wherein the bottom plate (110), front panel (120), rear panel (130), left panel (140), right panel (150), and upper cover (160) are each independently formed and assembled by bolts (P) and nuts (N), a metal outer casing (100), wherein the bottom plate (110), front panel (120), rear panel (130), left panel (140), right panel (150), and upper cover (160) are each independently formed and assembled, a weight balance (200) and a battery module (300) disposed within an outer casing body (100a) formed by assembling the bottom plate (110), the front panel (120), the rear panel (130), the left panel (140), and the right panel (150), and the weight The present invention includes an extendable bracket (170) that fixes the balance (200) inside the outer body (100a). The present invention allows the outer body to be assembled on-site and the weight balance and battery module to be stacked and arranged inside the outer body, thereby providing the advantage of reducing logistics costs associated with on-site application of the battery pack, as well as the advantage of enabling changes to the internal structure and maintenance.

Inventors

장중언
김태오

Assignees

주식회사 코리아비티에스

Dates

Publication Date: 20260507
Application Date: 20241030

Claims (11)

A metal enclosure comprising a rectangular base plate, a front panel, a rear panel, a left panel, a right panel, and an upper cover assembled to the front, rear, left, right, and top sides of the base plate, wherein the base plate, front panel, rear panel, left panel, right panel, and upper cover are each independently formed and assembled with bolts and nuts; A weight balance and a battery module disposed within an outer body formed by assembling the bottom plate, the front panel, the rear panel, the left panel, and the right panel; and An extension bracket for fixing the above weight balance inside the above outer body; A battery pack for a forklift including
In paragraph 1, A battery pack for a forklift, wherein the bottom plate has an orthogonal extension formed on the front and rear sides that protrudes upward and partially overlaps with the front panel and the rear panel, and the orthogonal extension has a fixing hole formed in the orthogonal extension that communicates with the fastening hole of the front panel and the rear panel.
In paragraph 1, The above left panel and the above right panel are A battery pack for a forklift, having a left lower extension and a right lower extension formed at the bottom that protrude in a direction facing each other and partially overlap with the bottom plate when assembled, and bolt holes formed in the left lower extension and the right lower extension that communicate with the fixing holes of the bottom plate.
In paragraph 1, The above left panel and the above right panel are A battery pack for a forklift, having a left upper extension and a right upper extension formed at the top that protrude in a direction facing each other and partially overlap with the upper cover when assembled, and bolt holes formed in the left upper extension and the right upper extension that communicate with the assembly holes of the upper cover.
In paragraph 1, A battery pack for a forklift, wherein the front panel has a first front end orthogonal section and a second front end orthogonal section formed at both ends that protrude toward the rear panel and overlap with a part of the left panel and the right panel when assembled, and fastening holes formed in the first front end orthogonal section and the second front end orthogonal section that communicate with the bolt holes of the left panel and the right panel.
In paragraph 1, A battery pack for a forklift, wherein the rear panel has a first rear end orthogonal section and a second rear end orthogonal section formed at both ends that protrude toward the front panel and overlap with parts of the left panel and right panel when assembled, and the first rear end orthogonal section and the second rear end orthogonal section have fastening holes formed therein that communicate with the bolt holes of the left panel and the right panel.
In paragraph 1, The above battery module is a lithium battery, and A battery pack for a forklift in which two or more lithium batteries are stacked and arranged within the above-mentioned enclosure body.
In paragraph 1, The above weight balance is placed on the bottom plate within the above outer body, and The above-described extension bracket is a forklift battery pack formed in a "C" shape, with one side bolted to the side of the weight balance and the other side bolted to the side of the outer casing body.
In paragraph 8, A battery pack for a forklift in which communication holes corresponding to bracket holes of the extension bracket are formed on the four sides of the above-mentioned outer casing.
In paragraph 1, It further includes a BMS, DC/DC converter, charging port, power withdrawal port, and antenna, The above BMS and the above DC/DC converter are installed on a circuit board, and A battery pack for a forklift in which the charging port, the power withdrawal port, and the antenna are installed on the upper cover and electrically connected to the circuit board.
In paragraph 1, The above weight balance is concrete, and The above concrete is a forklift battery pack with a cement, sand, and gravel ratio of 3:3:5.

Description

Battery pack for forklift The present invention relates to a battery pack for a forklift, and more specifically, to a battery pack for a forklift that allows for maintenance and system changes, thereby improving user convenience. Forklift batteries are classified into lead-acid batteries and lithium batteries. Lead-acid batteries are the most widely used batteries in forklifts. Lead-acid batteries have the advantage of lowering initial investment costs due to their relatively low price, but they require periodic replenishment of distilled water, require maintenance due to their heavy weight and inherent dangers, take a long time to charge, and pose environmental issues. Although lithium batteries are relatively expensive, they offer excellent stability, allow for a full charge with a short charging time, and require no separate maintenance, resulting in no additional costs. Therefore, recently, there is a trend to use environmentally friendly lithium-ion batteries as forklift batteries, as they do not require replenishment of distilled water and electrolyte, can be charged at any time, and do not produce harmful gases. However, since lithium batteries have a small volume, the overall weight of the forklift is reduced. Since reducing the overall weight of the forklift results in insufficient power when lifting objects, weights are applied to compensate for the weight reduction after the application of lithium batteries, thereby enabling safe operation. These forklift lithium battery packs were commercialized first in China, while Korea is still in the early stages of development. However, since the lithium battery packs for Chinese forklifts are integrated types made by adding scrap metal to the battery housing to increase weight and then finally assembling them, they are convenient in terms of maintaining compatibility with existing lead-acid battery packs, but they have the disadvantage of increasing logistics costs and after-sales service maintenance costs and making product changes difficult because the total weight of the battery pack ranges from 600kg to 1200kg. FIG. 1 is a drawing illustrating the outer casing of a battery pack for a forklift according to an embodiment of the present invention. FIG. 2 is a drawing showing the front panel and rear panel assembled on the front and rear sides of the bottom plate as an embodiment of the present invention. FIG. 3 is a drawing showing the appearance of an outer casing body in which a front panel, a rear panel, a left panel, and a right panel are assembled on the front and rear sides and left and right sides of a bottom plate as an embodiment of the present invention. FIG. 4 is a drawing showing the appearance before assembling the upper cover on the upper part of the outer body as an embodiment of the present invention. FIG. 5 is a drawing showing an upper cover assembled on the upper part of an outer body as an embodiment of the present invention. FIG. 6 is a drawing illustrating a weight balance on an outer body using an expandable bracket as an embodiment of the present invention. FIGS. 7 and 8 are drawings illustrating the arrangement of a weight balance and a battery module within an enclosure body as an embodiment of the present invention. FIG. 9 is a drawing showing a battery pack as an embodiment of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to sufficiently convey the concept of the present invention to those skilled in the art. FIG. 1 is a drawing for explaining the outer casing of a battery pack for a forklift according to an embodiment of the present invention, FIG. 2 is a drawing showing the front panel and rear panel assembled on the front and rear sides of a bottom plate according to an embodiment of the present invention, FIG. 3 is a drawing showing the outer casing body with the front panel, rear panel, left panel, and right panel assembled on the front and rear sides and left and right sides of a bottom plate according to an embodiment of the present invention, FIG. 4 is a drawing showing the outer casing body before the upper cover is assembled on the upper side according to an embodiment of the present invention, and FIG. 5 is a drawing showing the outer casing body with the upper cover assembled on the upper side according to an embodiment of the present invention. As illustrated in FIGS. 1 to 5, the battery pack (10) for a forklift includes a modularly designed enclosure (100). The enclosure (100) has a structure in which a bottom plate (110), a front panel (120), a rear panel (130), a left panel (140), a right panel (150), and an upper cover (160) are each independently