# US 11,999,262 B2 · Battery control assembly for a battery system and electric drivetrain for an electric vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,999,262 B2 - Document ID: US11999262B2 - Status: Granted - Kind: B2 - Application number: 18/074,593 - Filed: 2022-12-05 - Published: 2023-06-08 - Granted: 2024-06-04 - Earliest claimed: 2021-12-06 - Assignees: Volvo Car Corporation - Applicants: Volvo Car Corporation - Inventors: Torbjorn Larsson; Jonas Forssell; Robert Eriksson; Nikitas Sidiropoulos; Markus Ekström; Narendar Rao Gannamaneni; Jonas Björkholtz; Yafan Zhang - Web page: https://patentgrep.com/patent/US11999262B2 ## CPC - B60L 15/007: {Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles} - B60L 58/18: of two or more battery modules - B60L 53/11: {DC charging controlled by the charging station, e.g. mode 4} - B60L 53/22: Constructional details or arrangements of charging converters specially adapted for charging electric vehicles - B60L 53/24: Using the vehicle's propulsion converter for charging - B60L 58/21: having the same nominal voltage - H01M 10/46: Accumulators structurally combined with charging apparatus (circuits for charging H02J7/00) - H02J 7/50: acting upon multiple batteries simultaneously or sequentially - H02J 7/751: {concerning the insertion or the connection of the batteries} - H02J 7/855: {with circuits adapted for supplying loads from the battery} - B60L 2220/42: with use of more than one motor - B60L 2260/28: Four wheel or all wheel drive - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A battery control assembly for a battery system. The battery control assembly includes a plurality of cell-level control units, each including a cell-level switching unit being operable as a cell-level inverter. The plurality of cell-level control units are arranged in three control unit strings and the cell-level control units of each control unit string are electrically connected in series. First ends of each control unit string are electrically connected to a corresponding AC charging terminal. Second ends of the control unit strings are electrically connected in series via a first end switch and a second end switch. Moreover, at least one of the control unit strings includes an inner connection terminal. Furthermore, an electric drivetrain for an electric vehicle having such a battery control assembly is presented. ## Claims ### Claim 1 A battery control assembly for a battery system, the battery control assembly comprising: a plurality of cell-level control units, each of the cell-level control units being electrically connectable to an associated single battery cell or to an associated group of battery cells, and each of the cell-level control units comprising a cell-level switching unit being operable as a cell-level inverter, the plurality of cell-level control units being arranged in three control unit strings, the cell-level control units of each control unit string being electrically connected in series, and each of the control unit strings comprising a first end and a second end, the second end being arranged electrically opposite the first end, the first end of each control unit string being electrically connected to a corresponding AC charging terminal, the second ends of the three control unit strings being electrically connected in series via a first end switch and a second end switch, and at least one of the control unit strings comprising an inner connection terminal being arranged such that at least one cell-level control unit forming part of the respective control unit string is arranged on each side of the inner connection terminal, the inner connection terminal being connectable to a DC charging or discharging terminal or a further inner connection terminal. ### Claim 2 (depends on 1) The battery control assembly according to claim 1, wherein each first end is electrically connected to the respective AC charging terminal via a respective AC terminal switch. ### Claim 3 (depends on 1) The battery control assembly according to claim 1, wherein at least one of the second ends is electrically connected to a neutral terminal via a neutral terminal switch. ### Claim 4 (depends on 1) The battery control assembly according to claim 1, wherein each of the first ends is electrically connected to a respective first AC machine terminal for connecting a first AC electric machine to the battery control assembly. ### Claim 5 (depends on 4) The battery control assembly according to claim 4, wherein at least two out of the first ends are electrically connected to the respective first AC machine terminal via a respective first AC machine terminal switch and a respective second AC machine terminal switch. ### Claim 6 (depends on 1) The battery control assembly according to claim 1, wherein each of the second ends is electrically connected to a respective second AC machine terminal for connecting a second AC electric machine to the battery control assembly. ### Claim 7 (depends on 1) The battery control assembly according to claim 1, wherein at least one of the control unit strings comprises a DC output interface having a first DC output terminal and a second DC output terminal. ### Claim 8 (depends on 1) The battery control assembly according to claim 1, wherein at least two out of the first ends are electrically connected via a third end switch. ### Claim 9 (depends on 8) The battery control assembly according to claim 8, wherein the first ends are electrically connected in series via the third end switch and a fourth end switch. ### Claim 10 (depends on 1) The battery control assembly according to claim 1, wherein each control unit string comprises an inner connection terminal and the inner connection terminals are electrically connected in series via a respective first inner switch and a respective second inner switch. ### Claim 11 (depends on 1) The battery control assembly according to claim 1, wherein one inner connection terminal or at least one of the first ends is electrically connected to a first DC charging and discharging terminal. ### Claim 12 (depends on 1) The battery control assembly according to claim 1, wherein at least one of the first ends and/or at least one of the second ends is connected to a second DC charging and discharging terminal. ### Claim 13 (depends on 1) An electric drivetrain for an electric vehicle having the battery control assembly according to claim 1. ### Claim 14 (depends on 13) The electric drivetrain according to claim 13, comprising: a first AC electric machine being electrically connected to the battery control assembly via the first AC machine terminals, and/or a second AC electric machine being electrically connected to the battery control assembly via the second AC machine terminals. ### Claim 15 (depends on 13) The electric drivetrain according to claim 13, wherein a single battery cell or a group of battery cells is electrically connected to each of the cell-level control units.