Energy storage device for electric drive systems

Patent metadata

Field	Value
Publication number	US-11764718-B2
Application number	US-202017122938-A
Country	US
Kind code	B2
Filing date	Dec 15, 2020
Priority date	Jun 15, 2018
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

The present invention relates to an energy storage device, comprising power terminals for connecting to a voltage circuit of power electronics of a drive system, which drive system can be controlled by an external system controller as well as at least one electrical storage block; at least one power converter for connecting the voltage circuit of the power electronics of the drive system to an internal voltage circuit of the storage block; and a control device for controlling the at least one power converter. Said control device has a controller board having output and/or feed-in control means for controlling the power converter for the outputting of current from/feeding of current into the storage block, and/or voltage closed-loop and/or open-loop control means for the closed-loop and/or open-loop control of the output voltage of the energy storage device. According to the invention, said control device has an adaptation board, which is connected to the controller board. The adaptation board comprises a plurality of connection terminals for differently designed external system controllers, at least one communication interface for communicating with the controller board of the control device, and at least one adaptation circuit for adapting and transferring signals between the connection terminals of the adaptation board and the controller board.

First claim

We claim:

1. An energy storage device comprising:
power terminals for connecting to a voltage circuit of power electronics of a drive system, which drive system can be controlled by an external system controller as well as at least one electrical storage block;
at least one power converter for connecting the voltage circuit of the power electronics of the drive system to an internal voltage circuit of the storage block; and
a control device for controlling the at least one power converter;
wherein said control device has a controller board having an output and/or feed-in controller for controlling the power converter for the outputting of current from the storage block to the drive system and/or for the feeding of current from the drive system into the storage block and having a voltage closed-loop and/or open-loop controller for the closed-loop and/or open-loop control of the output voltage of the energy storage device;
wherein the control device comprises:
an adaptation board which is connected to the controller board, and wherein the adaptation board comprises a plurality of connection terminals ( 98 ) for differently designed external system controllers;
at least one communication interface for communicating with the controller board of the control device; and
at least one adaptation circuit for adapting and transferring signals between the connection terminals of the adaptation board and the controller board.

2. The device of claim 1 , wherein the adaptation board comprises a plurality of differently designed adaptation circuits, of which a respective matching circuit adapts the respective required signals, data and/or parameters from/to the respective external system controller.

3. The device of claim 1 , wherein the adaptation board further comprises a plurality of sensor connections for connection to different sensors providing sensor signals for the system controller and/or for the internal control device.

4. The device of claim 3 , wherein the adaptation board is connected by said sensor connections to energy storage devices internal sensors by the storage block thereof and/or at least one operating state on the power converter and/or on the internal voltage circuit is monitored, and is connected to external sensors which monitor at least one operating state of the drive system to be connected or the power electronics thereof.

5. The device of claim 1 , wherein the controller board comprises at least one microcontroller, at least one FPGA module, and hardware circuits.

6. The device of claim 1 , wherein the control device further comprises a communication board configured to perform field bus communication for the control device with signal-providing and/or signal-processing components of the energy storage device and with signal-providing and/or signal-processing components of the external system controller of the drive device.

7. The device of claim 6 , wherein the communication board has plug-in connections and is configured to be releasably plugged into the controller board.

8. The device of claim 1 , wherein the communication board and/or the adaptation board comprise a field bus communication module for field bus communication to the external control system, wherein the field bus communication module defines a mode of operation of the drive device and/or defines starting or stopping of the drive device and/or defines a desired value for a respective mode of operation of the drive device and/or defines variable limits during an operation of the drive device and/or defines a pre-control value for a regulation of the drive device and/or mode of operation of the drive device.

9. The device of claim 1 , wherein the controller board comprises an operation control instruments for setting and controlling different modes of operation of the energy storage device, wherein the operation control instruments comprise at least one controller for closed-loop control of an intermediate circuit voltage and/or a controller for closed-loop control of an intermediate circuit voltage with desired value window and/or a controller for closed-loop control of an intermediate circuit current and/or a controller for closed-loop control of a power and/or a controller for closed-loop control of a charge state and/or controller for active discharging of the storage block.

10. The device of claim 1 , wherein the controller board comprises a self-test module configured to self-test the power electronics.

11. The device of claim 1 , wherein the controller board comprises at least one parameterizable limiter module configured to control the controller board when a storage voltage limit is reached, which can be variably definable by parameterizing the limiter module, and/or when a storage current limit is reached, which can be variably definable by parameterizing the limiter module, and/or when an intermediate circuit current limit is reached, which can be variably definable by parameterizing the limiter module, and/or when an intermediate power limit is reached, which can be variably definable by parameterizing the limiter module, and/or when a temperature limit is reached, which can be variably definable by parameterizing the intercepting module, to limit or change at least one characteristic manipulated variable of the energy storage device and/or the drive device, in particular to limit or reduce an output or fed-in current and/or a voltage level.

12. The device of claim 1 , wherein the controller board comprises at least one monitoring module which is configured to monitor an over-temperature in the cooling water of a cooling device and/or in the at least one storage block and/or in an interior of the energy storage device and/or at at least one choke, and/or a state of at least one cooling device relay and/or a flow of coolant and/or a cooling unit state and to limit or change at least one characteristic manipulated variable of the energy storage device and/or the drive device as a function of the monitored variable.

13. The device of claim 1 , wherein the controller board comprises at least one monitoring module configured to monitor a balancing function of the storage blocks and to control at least one characteristic manipulated variable of the energy storage device as a function of the monitored balancing.

14. The device of claim 1 , wherein the controller board comprises a master/slave controller configured to operate a plurality of storage blocks in a master/slave mode, wherein the master/slave controller comprises a communicator for allowing a plurality of parallel-connected energy storage units to communicate with each other via a CAN BUS, and a synchronizer for synchronizing the voltage of the plurality of parallel-connected energy storage units, and apportioning a controller for equal apportioning of the current in the parallel-connected energy storage units.

15. The device of claim 1 , wherein the controller board comprises at least one parameterization module for parameterizing and/or variably setting at least one of the following functionalities:
at least one communication parameter;
at least one parameter of the maximum current, a minimum and/or maximum voltage, at least one sensor, at least one switching time and/or at least one switching frequency of the power electronics;
at least one of the control mode via a field bus and/or master/slave mode and/or error reaction mode,
at least one of defining a limit value for a cooling device and/or a balancing function and/or a voltage, and/or at least one threshold value for current and power of the energy storage device and/or the drive device,
nominal values of the nominal c

Assignees

• Liebherr Components Biberach Gmbh

Inventors

• Engst Christian
• Wanner Harald
• Welser Sven
• Schuler Michael
• Gleinser Josef

Classifications

• H02J7/60

  including safety or protection arrangements · CPC title

• H02J7/96

  in response to battery voltage · CPC title

• H02J7/977

  of the battery · CPC title

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H02J7/94

  in response to battery current · CPC title