Battery Pack Internal Short Circuit Detection Method and Related Apparatus, and Electric Vehicle

A battery pack internal short circuit detection method comprising:

• measuring terminal voltages of a reference battery of a battery pack and a target battery of the battery pack during a first charging process of the battery pack, wherein a voltage value of the target battery at a third moment (t3) is a fourth voltage (Vset2), wherein a voltage value of the reference battery at t3 and in reference to Vset2 is a fifth voltage (V1(t3)), and wherein t3 is during the first charging process;
• measuring voltages of the reference battery and the target battery during a second charging process of the battery pack, wherein a voltage value of the target battery at a fourth moment (t4) is Vset2, wherein a voltage value of the reference battery at t4 and in reference to Vset2 is a sixth voltage (V1(t4)), and wherein t4 is during the second charging process;
• and
• determining, based on V1(t3) and V1(t4), whether the target battery has an internal short circuit.

A battery pack internal short circuit detection apparatus, comprising:

• a memory configured to store program code;
• and
• a processor coupled to the memory, wherein the program code causes the processor to be configured to:
• obtain voltages of a reference battery of a battery pack and a target battery of the battery pack during a first charging process of the battery pack, wherein a voltage value of the reference battery at a first moment (t1) is a first voltage (Vset1), wherein a voltage value of the target battery at t1 and in reference to Vset1 is a second voltage (V2(t1)), and wherein t1 is during the first charging process;
• measure voltages of the reference battery and the target battery during a second charging process of the battery pack, wherein a voltage value of the reference battery at a second moment (t2) is Vset1, wherein a voltage value of the target battery at t2 and in reference to Vset1 is a third voltage (V2(t2)), and wherein t2 is during the second charging process;
• and
• determine, based on V2(t1) and V2(t2), whether the target battery has an internal short circuit.

A battery pack internal short circuit detection apparatus comprising:

• a memory configured to store program code;
• and
• a processor coupled to the memory, wherein the program code causes the processor to be configured to:
• obtain terminal voltages of a reference battery of a battery pack and a target battery of the battery pack during a first charging process of the battery pack, wherein a voltage value of the target battery at a third moment (t3) is a fourth voltage (Vset2), wherein a voltage value of the reference battery at t3 and in reference to Vset2 is a fifth voltage (V1(t3)), and wherein t3 is during the first charging process;
• measure voltages of the reference battery and the target battery during a second charging process of the battery pack, wherein a voltage value of the target battery at a fourth moment (t4) is Vset2, wherein a voltage value of the reference battery at t4 and in reference to Vset2 is a sixth voltage (V1(t4)), and wherein t4 is during the second charging process;
• and
• determine, based on V1(t3) and V1(t4), whether the target battery has an internal short circuit.