US-12620659-B2 - Mobile energy store and method for operating a mobile energy store

US12620659B2US 12620659 B2US12620659 B2US 12620659B2US-12620659-B2

Abstract

A mobile energy store for outputting electrical energy. The mobile energy store has, in particular, a storage unit which may have a modular structure and may comprise storage modules, wherein the mobile energy store also has a number of rechargeable battery interfaces for outputting the electrical energy to rechargeable batteries and/or electrical devices comprising rechargeable batteries. A method for operating a mobile energy store, wherein the storage unit of the mobile energy store can be charged with electrical energy and the electrical energy is output from the storage unit to rechargeable batteries and/or electrical devices including rechargeable batteries with at least one rechargeable battery interface.

Inventors

Georg Holzmeier

Assignees

HILTI AKTIENGESELLSCHAFT

Dates

Publication Date: 20260505
Application Date: 20211005
Priority Date: 20201009

Claims (20)

1 . A mobile energy store for outputting electrical energy, the mobile energy store comprising: a chassis for transporting the mobile energy store; an energy storage unit connected to the chassis; a control head connected to the energy storage unit, the control head including electronics for controlling an output of electrical energy from the energy storage unit; and a plurality of rechargeable battery interfaces for outputting the electrical energy to rechargeable batteries or electrical devices including rechargeable batteries; the chassis being connected directly to the energy storage unit via a first interface, and the energy storage unit being connected directly to the control head via a second interface.
2 . The mobile energy store as recited in claim 1 wherein the energy storage unit has a plurality of storage modules connected to one another by a storage module interface.
3 . The mobile energy store as recited in claim 1 wherein the mobile energy store includes at least one connection for a mains plug of an electrical device.
4 . The mobile energy store as recited in claim 1 wherein the mobile energy store, for the purpose of receiving electrical energy, includes a mains cable for connecting the mobile energy store to an energy network.
5 . The mobile energy store as recited in claim 1 wherein the energy storage unit is inductively chargeable.
6 . The mobile energy store as recited in claim 1 wherein the electronics communicate with the rechargeable battery interfaces in a wireless or wired fashion.
7 . The mobile energy store as recited in claim 1 wherein the interfaces are electrical or mechanical interfaces.
8 . The mobile energy store as recited in claim 1 wherein the control head includes a control panel connected to the electronics for communication in a wired or wireless fashion.
9 . The mobile energy store as recited in claim 1 wherein the control head includes a display device connected to the electronics for communication in a wired or wireless fashion.
10 . The mobile energy store as recited in claim 1 wherein the chassis includes a drive with a motor, wherein the motor obtains drive energy from the energy storage unit of the mobile energy store.
11 . The mobile energy store as recited in claim 1 wherein the chassis includes wheels connected to an axle.
12 . The mobile energy store as recited in claim 1 wherein the chassis includes castors.
13 . A method for operating a mobile energy store as recited in claim 1 , the method comprising the following steps: a) providing the mobile energy store; b) charging the energy storage unit of the mobile energy store; and c) outputting electrical energy from the energy storage unit of the mobile energy store to the rechargeable batteries or the electrical devices via the at least one rechargeable battery interface.
14 . The method as recited in claim 13 wherein an amount of electrical energy to be output is settable via storage modules in the energy storage unit of the mobile energy store.
15 . The method as recited in claim 13 wherein the electrical energy is also output via a connection for a mains plug of an electrical device.
16 . The mobile energy store as recited in claim 1 wherein the first interface electrically and mechanically connects the energy storage unit and the chassis, the chassis further comprising wheels located below the energy storage unit.
17 . The mobile energy store as recited in claim 1 wherein the energy storage unit constitutes a modular storage unit composed of a plurality of storage modules one above the other.
18 . The mobile energy store as recited in claim 17 wherein the storage modules are connected to one another via third interfaces.
19 . The mobile energy store as recited in claim 18 further comprising brackets connecting the storage modules in addition to the third interfaces.
20 . The mobile energy store as recited in claim 17 wherein the control head is arranged above the energy storage unit.

Description

The present invention relates to a mobile energy store for outputting electrical energy. The mobile energy store has, in particular, a storage unit which may have a modular structure and may comprise storage modules, wherein the mobile energy store also has a number of rechargeable battery interfaces for outputting the electrical energy to rechargeable batteries and/or electrical devices comprising rechargeable batteries. In a second aspect, the invention relates to a method for operating a mobile energy store, wherein the storage unit of the mobile energy store can be charged with electrical energy and the electrical energy is output from the storage unit to rechargeable batteries and/or electrical devices comprising rechargeable batteries by means of at least one rechargeable battery interface. BACKGROUND In the field of hand-operated power tools, such as angle or cut-off grinders, drills, drill drivers, hammer drills, slot cutters, dispensers, bolt-firing tools etc., devices which no longer obtain their electrical energy via a mains connection but rather can be operated without a cable connection with a rechargeable battery as an energy supply unit are being increasingly brought onto the market. These so-called “rechargeable battery devices” have the advantage that there is no need for an electrical supply line at the place of work. This is advantageous, in particular, when the rechargeable-battery-operated power tools are not intended to be operated in the domestic environment, for example, but rather on a construction site which is not fully equipped with a power supply. This is because the rechargeable battery devices can be equipped with rechargeable batteries which make it possible to operate the power tool for a certain time even without an existing power supply. The provision of a power supply may be associated with a considerable amount of effort, in particular on large construction sites which have not been opened for very long, or in the case of other work outdoors. SUMMARY OF THE INVENTION However, the disadvantage of the known rechargeable battery devices is that, in the case of series applications or heavy work in particular, the on-board rechargeable batteries are quickly exhausted. Therefore, it may be desirable, for example on a construction site, despite the use of rechargeable battery devices, to have a replenishment of electrical energy in order to charge a second rechargeable battery pack—for example while working with a first rechargeable battery pack—in order to be able to work continuously. It is an object of the present invention to overcome the above-described defects and disadvantages of the prior art and to provide a mobile energy store which can be used to ensure a stable and needs-oriented supply with electrical energy at locations which do not have a normal power supply or a connection to the public mains. This may be a construction site, for example. The energy store is intended to be able to be transported robustly and easily, with the result that it can also be moved along in a simple and uncomplicated manner on rough terrain. The invention provides a mobile energy store for outputting electrical energy. The mobile energy store is characterized in that it comprises a chassis for transporting the mobile energy store, wherein the chassis is connected to a storage unit, wherein the storage unit is connected to a control head, wherein the control head comprises electronics for controlling the output of the electrical energy, wherein the mobile energy store has a number of rechargeable battery interfaces for outputting the electrical energy to rechargeable batteries and/or electrical devices comprising rechargeable batteries. The invention therefore relates to a portable battery store, which is simple to transport on account of its chassis, for supplying rechargeable-battery-operated electric power tools, for example on a construction site or outdoors at a relatively great distance from a developed power supply or the mains. Large battery stores can often quickly become very heavy. The present invention provides the robust chassis which is suitable for construction sites. The energy store can be easily transported to the construction site and transported away again by means of this chassis. The chassis may comprise, for example, two larger wheels with an axle and two smaller castors on the opposite side of the energy store. In other words, in the context of the invention, it may be preferred for the chassis of the mobile energy store to comprise two wheels which can be connected to an axle. Furthermore, the chassis may comprise two castors, wherein the castors preferably have a smaller diameter than the wheels or rollers and are at a shorter distance from one another than the wheels of the chassis. In addition, the chassis may have a push bar in order to make it possible to ergonomically push and pull the mobile energy store. In order to achieve a required push height for the