US 11,777,329 B2Granted

Method for controlling a charging or discharging current of a removable battery pack and/or an electrical device and system for carrying out the method

AssigneeRobert Bosch GmbH

InventorsAlexander Osswald, Christoph Klee, Holger Wernerus, Juergen Mack, Marc-Alexandre Seibert, Mickael Segret, Tim Brecht

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Abstract

A method controls a charging or discharging current of a removable battery pack and/or an electrical device, in particular a charging device, a diagnostic device or an electrical consumer, using a first monitoring unit integrated in the removable battery pack and a further monitoring unit integrated in the electrical device. The method includes monitoring a defined control potential of a signal or data contact between the removable battery pack and the electrical device using the further monitoring unit.

Claims7

Dependent claims

A method for controlling (i) a charging current supplied to a removable battery pack, or (ii) a discharging current from the removable battery pack using a first monitoring unit integrated in the removable battery pack, the method comprising:

monitoring a defined control potential of a signal or data contact between the removable battery pack and an electrical device using an evaluation unit of the electrical device, the removable battery pack operably connected to the electrical device;
changing the defined control potential using the first monitoring unit when the first monitoring unit has identified a fault state of the removable battery pack;
signaling the identified fault state by changing a display of the removable battery pack;
forming the defined control potential from (i) at least one first resistor in the removable battery pack at a first reference potential, and (ii) at least one further resistor in the electrical device at a second reference potential different from the first reference potential, wherein changing the defined control potential comprises changing the defined control potential in the removable battery pack in a direction of the second reference potential by bypassing the at least one first resistor when the first monitoring unit has identified the fault state of the removable battery pack;
setting an output signal of the evaluation unit to a LOW level when the defined control potential has changed in the direction of the second reference potential;
supplying the output signal of the evaluation unit and an output signal of a second monitoring unit of the electrical device to a logic link element, wherein an output of the logic link element is a control signal for a switching element;
using the switching element to interrupt or establish the charging current or the discharging current based on the output of the logic link element;
connecting the output signal of the evaluation unit to the second monitoring unit with a first filter element;
connecting an input of the evaluation unit to the second monitoring unit with a second filter element, wherein the input of the evaluation unit is the defined control potential;
detecting the change in the defined control potential using the second monitoring unit;
and
logging the identified fault state using the second monitoring unit.

9 more elements

A system comprising:

a removable battery pack including a first monitoring unit and a first electromechanical interface having a first plurality of electrical contacts;
and
an electrical device including:
an evaluation unit,
a second electromechanical interface having a second plurality of electrical contacts,
a second monitoring unit,
a logic link element configured to receive an output signal of the evaluation unit and an output signal of the second monitoring unit,
a switching element configured to receive an output of the logic link element,
a first filter element configured to connect the output signal of the evaluation unit to the second monitoring unit, and
a second filter element configured to connect an input of the evaluation unit to the second monitoring unit,
wherein in each of the first and second plurality of electrical contacts (i) a first electrical contact is configured as an energy supply contact supplied with a first reference potential, (ii) a second electrical contact is configured as an energy supply contact supplied with a second reference potential, and (iii) a third electrical contact is configured as a signal or data contact, and
wherein the system is configured to control (i) a charging current supplied to the removable battery pack from the electrical device using the first monitoring device, or (ii) a discharging current from removable battery pack to the electrical device using the first monitoring unit, the system configured to:
monitor a defined control potential of the signal or data contact between the removable battery pack and the electrical device using the evaluation unit, the defined control potential supplied to the input of the evaluation unit,
change the defined control potential using the first monitoring unit when the first monitoring unit has identified a fault state of the rechargeable battery pack, and
interrupt or establish a charging or discharging process of the removable battery pack based on the output of the logic link element using the switching element.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/379,454Filed 19 Jul 2021
Priority: DE 10 2020 209 400.424 Jul 2020
Published: US 2022/0029436 A127 Jan 2022
Granted: 3 Oct 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H02J 7/80
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: including monitoring or indicating arrangements
H02J 7/50
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: acting upon multiple batteries simultaneously or…
H02J 7/60
Circuit arrangements for charging or discharging batteries or for supplying loads from batteries: including safety or protection arrangements
H02J 7/663
Including safety or protection arrangements: using battery or load disconnect circuits