# US 12,760,498 B2 · Electric excavator

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- Number: US 12,760,498 B2
- Document ID: US12760498B2
- Status: Granted
- Kind: B2
- Application number: 18/579,925
- Filed: 2022-06-17
- Published: 2024-07-18
- Granted: 2026-10-13
- Earliest claimed: 2021-07-30
- Assignees: Komatsu Ltd.
- Applicants: Komatsu Ltd.
- Inventors: Masaho Yamaguchi; Takeshi Kitagawa
- Web page: https://patentgrep.com/patent/US12760498B2

## CPC

- E02F 9/0866: {Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment}
- E02F: DREDGING; SOIL-SHIFTING (winning peat E21C49/00)

## Abstract

An exterior cover includes a left side panel and a right side panel opposite to each other in a left/right direction, a vent provided in left side panel, and a vent provided in right side panel. A battery is arranged between left side panel and right side panel, and supplies power to an electric motor. A hydraulic equipment is arranged forward of battery. A cooling device includes a cooling fan, and is arranged facing an area located between battery and hydraulic equipment in plan view in the left/right direction.

## Claims

### Claim 1

An electric excavator comprising:
an exterior cover including a first side panel and a second side panel opposite to each other in a left/right direction, a first vent provided in the first side panel, and a second vent provided in the second side panel;
a battery arranged between the first side panel and the second side panel and supplying power to a power source;
a hydraulic equipment arranged forward of the battery; and
a cooling device including a first cooling fan and a second cooling fan, the cooling device arranged facing an area located between the battery and the hydraulic equipment in plan view in the left/right direction, wherein
the cooling device is arranged so that the first cooling fan supplies air to a first area on a battery side, and the second cooling fan supplies air to a second area on a hydraulic equipment side, and
both the air supplied to the first area to cool the battery and the air supplied to the second area to cool the hydraulic equipment are discharged from the second vent.

### Claim 2 (depends on 1)

The electric excavator according to claim 1, wherein the cooling device is configured such that air taken in from the first vent by driving of the first cooling fan passes between the battery and is discharged from the second vent, and air taken in from the first vent by driving of the second cooling fan passes between the hydraulic equipment and is discharged from the second vent.

### Claim 3 (depends on 1)

The electric excavator according to claim 1, further comprising a partitioning member arranged between the battery and the hydraulic equipment.

### Claim 4 (depends on 3)

The electric excavator according to claim 3, wherein the cooling device is arranged to send air to each of the area on the battery side relative to the partitioning member and the area on the hydraulic equipment side relative to the partitioning member.

### Claim 5 (depends on 1)

The electric excavator according to claim 1, wherein at least part of the cooling device faces the hydraulic equipment in a direction in which a rotation axis of the second cooling fan extends.

### Claim 6 (depends on 1)

The electric excavator according to claim 1, wherein at least part of the cooling device faces the battery in a direction in which a rotation axis of the first cooling fan extends.

### Claim 7 (depends on 1)

The electric excavator according to claim 1, further comprising:
an oil cooler facing the hydraulic equipment in a direction in which a rotation axis of the second cooling fan extends; and
a radiator facing the battery in the direction in which the rotation axis of the first cooling fan extends.