Voltage determinator and voltage determination system
A voltage determinator which determines a battery voltage using a voltage determination circuit and is configured to output the determination voltage to a corrector in a separate body includes a characteristics signal generation circuit that is configured to output a characteristics signal indicating characteristics of the voltage determination circuit to the corrector.
1. A voltage determinator comprising:
a voltage determination circuit configured to determine each inter-terminal voltage of a plurality of battery cells configuring a battery, and output a voltage obtained by amplifying the each determined inter-terminal voltage to a corrector in a separate body as a determination voltage; and
a coupler configured to connect the corrector and the voltage determination circuit in an alternating manner,
wherein the voltage determination circuit includes:
a voltage divider circuit configured to generate a DC voltage by dividing a predetermined voltage, the DC voltage indicating characteristics of the voltage determination circuit; and
an A/D conversion circuit configured to generate a digital signal of the DC voltage as a characteristics signal by performing an A/D conversion on the DC voltage,
wherein the voltage determination circuit is configured to output a set voltage input from the voltage divider circuit to the coupler, and
the voltage determination circuit is configured to output the characteristics signal indicating characteristics of the voltage determination circuit to the corrector,
wherein the characteristics signal is based on the set voltage.
2. The voltage determinator according to claim 1 ,
wherein the characteristics of the voltage determination circuit are at least one of an offset error of the voltage determination circuit and a gain error of the voltage determination circuit.
3. The voltage determinator according to claim 1 ,
wherein the battery includes a plurality of battery modules,
each of the battery modules includes the plurality of battery cells, and
a plurality of the voltage determination circuits are provided in a one-to-one correspondence with each of the plurality of battery modules in the voltage determinator.
4. The voltage determinator according to claim 3 ,
wherein the characteristics of the voltage determination circuit are at least one of an offset error of the voltage determination circuit and a gain error of the voltage determination circuit.
5. A voltage determination system comprising:
the voltage determinator according to claim 1 ; and
the corrector,
wherein the corrector corrects the determination voltage on the basis of the characteristics signal input from the voltage determinator.
6. The voltage determination system according to claim 5 ,
wherein the characteristics of the voltage determination circuit are at least one of an offset error of the voltage determination circuit and a gain error of the voltage determination circuit.
7. The voltage determination system according to claim 6 ,
wherein the battery includes a plurality of battery modules,
each of the battery modules includes the plurality of battery cells, and
a plurality of the voltage determination circuits are provided in a one-to-one correspondence with each of the plurality of battery modules in the voltage determinator.
8. The voltage determination system according to claim 5 ,
wherein the battery includes a plurality of battery modules,
each of the battery modules includes the plurality of battery cells, and
a plurality of the voltage determination circuits are provided in a one-to-one correspondence with each of the plurality of battery modules in the voltage determinator.
9. The voltage determination system according to claim 1 ,
wherein the coupler is a coupling capacitor.