Ultra-compact EV battery unit and detachable battery pack (detachable from the side)

A detachable battery pack system allows ultra-compact EVs to charge via external outlets, addressing the charging challenges in multi-unit dwellings.

JP3254727UActive Publication Date: 2026-02-16UNITED SOLUTIONS CO LTD
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Patent Information

Application Number
JP2025002407U
Authority / Receiving Office
JP · JP
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2025-06-25
Publication Date
2026-02-16
Estimated Expiration
2035-06-25

AI Technical Summary

Technical Problem

Ultra-compact EVs face challenges in charging due to the need for direct connection with a dedicated cord, making it difficult to install extension cords in public corridors and building walls, thus preventing charging in multi-unit dwellings.

Method used

A battery unit with detachable battery packs is designed, allowing charging via external outlets using a 100V or 200V single-phase three-wire connection.

Benefits of technology

Enables charging in apartment buildings and similar multi-unit dwellings by using external chargers, overcoming the limitations of direct cord connections.

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Abstract

We provide an ultra-compact battery unit for EVs that can charge a standalone battery pack by connecting it to an external charger from a household 100V or 200V (single-phase three-wire) outlet. [Solution] An ultra-compact EV battery unit 1 is a horizontally placed cube with an openable door 2 attached to one side, and the door and its back, top, bottom, left and right sides are surrounded by steel plate processing to protect the battery pack, and the battery pack can be fixed inside the door with a fixing belt 7.The battery pack is detachable so that it can be charged as a single battery pack by connecting it to an external charger from a 100V or 200V (single-phase 3-wire) outlet for home use, etc.
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Description

[Technical Field]

[0001] This invention has developed a battery unit that incorporates a detachable battery pack that supplies power to the drive system and attached power system. [Background technology]

[0002] A battery unit with multiple built-in detachable battery packs was created and installed, and by opening and closing the door, multiple battery packs in the unit can be attached and detached. Summary of the Invention [Problem to be solved by the invention]

[0003] Currently, ultra-compact EVs are charged using a dedicated cord that is directly connected to the vehicle itself, making it difficult to install extension cords in public corridors and on the walls of buildings in apartment complexes and other multi-unit housing, making charging impossible. [Means for solving the problem]

[0004] A battery unit incorporating multiple detachable battery packs was created and installed. [Effects of the Invention]

[0005] By creating and installing a battery unit with a built-in detachable battery pack, it is now possible to charge the battery in apartment buildings and other multi-unit dwellings by connecting it to an external charger from a 100V or 200V (single-phase three-wire) outlet for home use. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a representative diagram showing one embodiment of a micro EV battery unit and a detachable battery pack (side detachable type) according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0007] The ultra-compact EV battery unit and detachable battery pack (detachable from the side) have an upward-opening door attached to the side of the battery unit, with multiple battery packs built inside the door and secured with belts. [Example]

[0008] An embodiment will be described below with reference to the accompanying drawings. 1 is a battery unit made of steel, 2 is a battery unit door made of steel, 3 is a hinge for the battery unit door, 4 is an opening / closing locking hardware for the battery unit door, 5 is a hardware for fixing the battery, 6 is a belt fastener for fixing the battery, and 7 is a battery fixing belt. [Explanation of symbols]

[0009] 1 Battery Unit 2 Battery unit door 3 Battery unit door hinge 4 Battery unit door locking hardware 5 Battery fixing hardware 6 Battery fixing belt fastener 7 Battery fixing strap

Claims

[Claim 1] Currently, ultra-compact EVs are charged directly to the vehicle body using a dedicated cord, but in apartment buildings and other multi-unit housing, it is difficult to install extension cords in public corridors and on the walls of the building, making charging impossible.However, we have created and installed a battery unit with multiple built-in detachable battery packs, making it possible to detach individual battery packs within the unit by opening and closing the door.Currently, the battery is located in a battery cover under the driver's seat, and cannot be removed without removing the driver's seat, the battery cover, and the battery fixing hardware.However, with this device, the detached individual battery pack can be charged by connecting it to an external charger from a household 100V or 200V (single-phase 3-wire) outlet, making charging possible even in apartment buildings and other multi-unit housing.