Battery cell for a battery of a motor vehicle, battery, motor vehicle, and method for operating a battery cell

A battery cell for a battery of a motor vehicle, comprising:

• a battery cell housing, in which a galvanic element is accommodated, with two electrical connection terminals, by way of which the battery cell is electrically connected to at least one other battery cell of the battery, and with a control device, which is operatively connected to at least one functional unit of the battery cell,
• wherein the control device of the battery cell programmed to receive an encrypted command issued by an external control device, wherein the control device includes a checking or verification unit, which is programmed to decrypt the encrypted command and verify an authorization of the external control device to issue the command via an access control, an authorization of the access control is a prerequisite for the execution of the encrypted command,
• wherein the battery cell further comprises at least one key for the encryption of information to be transmitted by the external control device and data to be stored in a memory of the battery cell and for decrypting commands issued by the external control device,
• wherein the access control is executed by the verification unit, in which the prior execution of a first command, hierarchically overriding command, is a prerequisite for the execution of a second command, hierarchically subordinate command so that a multistep security is provided, in which an access to a next level is enabled after unlocking of a previous level,
• wherein for each step of the multistep security, different key for the encryption is provided, and
• wherein the at least one other battery cell includes a second control device, and the external control device issues the command to the control device of the battery cell and the second control device of the at least one other battery cell.