Device for testing and maintaining a high voltage battery and uses thereof

• US 10,014,702 B2
• Filed: 09/30/2013
• Issued: 07/03/2018
• Est. Priority Date: 11/20/2012
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Vogel, Markus, Ostertag, Peter, Lehmann, Siegfried
• Primary Examiner(s): Levin, Naum B
• Application Number:
  US14/443,919
• Publication Number:
  US 20150318727A1
• Time in Patent Office: 1,737 Days
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/00306 Overdischarge protection
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

Abstract

A device for servicing/maintaining a high-voltage battery, which has individual battery cells or battery modules, and high-voltage positive and negative terminals, and a battery management system having a data transmission terminal for bidirectionally transmitting management system data between the management system and an information-processing unit, external to the battery. The device includes at least two of: a battery charge device, a battery discharge device, and a battery diagnostic device. A battery charge device brings a battery to a higher charge state, and has positive and negative terminals to be connected to positive and negative battery terminals. A battery diagnostic device checks a battery, and the device, for the presence of internal errors, and to indicate recognized internal errors, and may also produce diagnostic data for the battery state and triggering functions directed to bring the device and/or battery safely into a different state, to operate/test them.

Claims

1. A device for servicing and maintaining a high-voltage battery, which is connectable thereto, comprising:

a connection for connecting to the high-voltage battery;

a high-voltage battery charge device to bring the high-voltage battery to a higher charge state, and having a high-voltage positive terminal which is connectable to a high-voltage positive terminal of the high-voltage battery, and a high-voltage negative terminal which is connectable to a high-voltage negative terminal of the high-voltage battery, wherein the high-voltage battery includes an assemblage of individual battery cells or an assemblage of battery modules, the high-voltage positive terminal, the high-voltage negative terminal, and a battery management system having a data transmission terminal;

a high-voltage battery diagnostic device to check the high-voltage battery for internal errors, to display recognized internal errors, and having an information-processing unit, which is external relative to the high-voltage battery, having the data transmission terminal to bidirectionally transmit battery management system data between the information-processing unit and the battery management system of a connected high-voltage battery, wherein the high-voltage battery charge device and the high-voltage battery diagnostic device are housed together in a single housing that is external to the high-voltage battery; and

a safety device, inside the information-processing unit, to evaluate diagnostic data produced by the high-voltage battery diagnostic device and to produce reaction data that is transmittable to the high-voltage battery via a data bus system that is essentially external relative to the device, including a Controller Area Network (CAN), and that define functions directed to operating the high-voltage battery and/or the device in a safe state or testing it, and that is configured to bidirectionally transmit, via a data bus system that is essentially internal relative to the device, diagnostic data and/or reaction data between the safety device and the high-voltage battery diagnostic device.

2. The device of claim 1, further comprising:

a human-machine interface, provided inside the information-processing unit, including;

an output device to output or display battery management system data, diagnostic data, and reaction data,

an input device to input user control data by a user, and

at least one of;

an input-output interface to which the output device and the input device are connected, and that is configured to output user control data inputted by the user, for transmission to the battery management system of the high-voltage battery, to the diagnostic device, or to the safety device,

a remote control having an output device for outputting or displaying battery management system data, diagnostic data, and reaction data, and/or having an input device for inputting of user control data by a user, and

a network terminal, provided inside the information-processing unit, that is configured to read in user control data produced by a user for transmission to the battery management system of the high-voltage battery, to the diagnostic device, or to the safety device.

3. The device of claim 2, wherein the human-machine interface and/or the remote control is configured to display at least one datum selected from a group including the following:

output values of the battery management system of the high-voltage battery, in particular at least one datum selected from a group of data including the following;

a manufacturer, a serial number, a date of manufacture, a specification, a charge duration, a discharge duration, a maximum charge current, a maximum discharge current, a maximum charge power at a specified target voltage, a maximum discharge power at a specified target voltage, a content of a log data file for a charge process, a content of a log data file for a discharge process, and a content of a log data file for a diagnostic process, and

a charge state of the high-voltage battery, in particular a battery voltage and output values of the battery management system of the high-voltage battery.

4. The device of claim 1, wherein the battery management system of the high-voltage battery contains information stored therein relating to the high-voltage battery specification, including a maximum charge current and a maximum charge power at a specified target voltage, and the high-voltage battery charge device is configured to produce pulsed or linear current-time curves in accordance with a setting of the high-voltage battery specification, and to feed them to the high-voltage battery.

5. The device of claim 4, wherein the high-voltage battery charge device includes:

an AC/DC converter and an AC network terminal for connecting the AC/DC converter to an external AC mains network, and/or a DC/DC converter and a DC supply terminal for connecting the DC/DC converter to an external DC network,

DC terminals that are connected to the outputs at the charge device side of the AC/DC converter or of the DC/DC converter,

a controllable charge current regulator, a current and voltage monitoring device for acquiring a charge current-time curve of a charge current fed to a high-voltage battery connected to the device, and a charge voltage-time curve of a charge voltage applied to the high-voltage battery, and

a charge control device for controlling a charge current-time curve of a charge current fed to a high-voltage battery connected to the device, and a charge voltage-time curve of a charge voltage applied to the high-voltage battery.

6. The device of claim 1, wherein the high-voltage battery diagnostic device is configured to receive, evaluate, and store a log data file for a charge process, a log data file for a discharge process, and/or a log data file for a diagnostic process via the information-processing unit from a battery management system of the high-voltage battery.

7. The device of claim 1, further comprising:

a data bus system for transmitting real-time data that contains in particular a Controller Area Network configured essentially for external bidirectional data transfer, and a data bus system that is internal relative to the device, the data bus system being configured to connect the following to one another in terms of communication;

the charge device, via its data transmission terminal,

the discharge device, via its data transmission terminal,

the diagnostic device,

the information-processing unit, in particular a communication device provided therein with the data transmission terminal, and

the high-voltage battery, via its data transmission terminal;

wherein the data bus system is configured to transmit at least one datum selected from the group including the following;

codes for internal errors, codes for functions and values of parameters for the functions, diagnostic data, reaction data, user control data, and battery management system data, in particular of a battery management system of the high-voltage battery, including at least one datum selected from a group including the following;

a manufacturer, a serial number, a date of manufacture, a high-voltage battery specification, a charge duration, a discharge duration, a maximum charge current, a maximum discharge current, a maximum charge power at a specified target voltage, a maximum discharge power at a specified target voltage, a content of a log data file for a charge process, a content of a log data file for a discharge process, and/or a content of a log data file for a diagnostic process.

8. The device of claim 1, wherein it is used for at least one of the following:

servicing a high-voltage battery;

maintaining a high-voltage battery;

diagnosing a high-voltage battery;

putting the high-voltage battery into an arbitrary specified charge state for the pre-conditioning of the high-voltage battery in accordance with manufacturer specifications, including before installing the high-voltage battery in a new electric or hybrid vehicle, or after a repair operation on an electric or hybrid vehicle before the electric or hybrid vehicle is picked up,

servicing, maintaining, and/or diagnosing a high-voltage battery in a repair shop, or

servicing, maintaining, and/or diagnosing a high-voltage battery at a high-voltage battery storage site.

9. The device of claim 1, wherein the high-voltage battery diagnostic device is also configured preferably to produce diagnostic data relating to the state of the high-voltage battery, and to trigger functions that are directed to bring the device and/or the high-voltage battery safely to a different state, to operate them, and/or to test them.