Arrangement having at least one battery
A battery pack having at least one battery with two electrical contacts in which a parallel circuit comprising a first and a second resistor is arranged between a first contact and a first pole, the first resistor switches off at a first temperature, the second resistor switches off at a second temperature, the first temperature is higher than the second temperature, and the first resistor has a higher current carrying capability than the second resistor. The circuit serves as fuse protection for the battery against overheating both when the battery is charging and when the battery is discharging.
1. An arrangement comprising:
at least one battery with two electrical contacts, a first electrical contact being connected to a first pole of the battery, and a second electrical contact being connected to a second pole of the battery; and
a parallel circuit comprising a first resistor and a second resistor and disposed between the first contact and the first pole;
wherein the first resistor switches in disabling fashion at a first temperature, the second resistor switches in disabling fashion at a second temperature, the first temperature is higher than the second temperature, and the first resistor has a higher current-carrying capacity than the second resistor, wherein the first temperature is between 0.5° C. and 5° C. higher than a protection temperature of the battery.
2. The arrangement according to claim 1 , wherein the battery is a chargeable battery.
3. The arrangement according to claim 2 , wherein the battery has lithium ions.
4. The arrangement according to claim 3 , wherein a cathode of the battery has lithium iron phosphate.
5. The arrangement according to claim 4 , wherein at least one of the first resistor and the second resistor are resistors whose resistance increases with temperature.
6. The arrangement according to claim 5 , wherein the chargeable battery is charged and discharged via the first and second contacts.
7. The arrangement according to claim 6 , wherein the protection temperature, at which the arrangement electrically insulates the battery, is located between the first temperature and the second temperature, at which the first and second resistors switch in disabling fashion.
8. The arrangement according to claim 1 , wherein the battery is charged and discharged via the first and second contacts.
9. The arrangement according to claim 1 , wherein at least one of the first resistor and the second resistor are resistors whose resistance increases with temperature.
10. The arrangement according to claim 1 , wherein the protection temperature, at which the arrangement electrically insulates the battery, is located between the first temperature and the second temperature, at which the first and second resistors switch in disabling fashion.
11. The arrangement according to claim 1 , wherein the first and second resistors are arranged in parallel with each other to form a parallel circuit.
12. The arrangement according to claim 11 , wherein the parallel circuit serves as fuse protection for the battery against overheating.
13. The arrangement according to claim 12 , wherein the protection temperature, at which the arrangement electrically insulates the battery, is located between the first temperature and the second temperature, at which the first and second resistors switch in disabling fashion.
14. The arrangement according to claim 1 , wherein the battery is a chargeable battery; the first and second resistors are arranged in parallel with each other to form a parallel circuit; and the parallel circuit serves as fuse protection for the battery against overheating both when the battery is charging and when the battery is discharging.
15. The arrangement according to claim 14 , wherein the protection temperature, at which the arrangement electrically insulates the battery, is located between the first temperature and the second temperature, at which the first and second resistors switch in disabling fashion.
16. The arrangement according to claim 14 , wherein at least one of the first resistor and the second resistor are resistors whose resistance increases with temperature.
17. An arrangement comprising:
at least one battery with two electrical contacts, a first electrical contact being connected to a first pole of the battery, and a second electrical contact being connected to a second pole of the battery; and
a parallel circuit comprising a first resistor and a second resistor and disposed between the first contact and the first pole;
wherein the first resistor is a resistor having a resistance that increases with temperature and that has a first disabling resistance value and switches in disabling fashion at a first temperature, the second resistor is a resistor having a resistance that increases with temperature and that has a second disabling resistance value and switches in disabling fashion at a second temperature, the first temperature is substantially equal or higher than a protection temperature of the battery and the second temperature is lower than the first temperature and the protection temperature, the first resistor has a higher current-carrying capacity than the second resistor, and the first disabling resistance value is similar to the second disabling resistance value;
wherein the parallel circuit is configured to one of supply and carry a total current which is split into a first partial current via the first resistor and a second partial current via the second resistor up to the second temperature, and, above the second temperature and below the first temperature, to one of supply and carry the total current via the first resistor, and, above the first temperature, to one of supply and carry substantially no current, wherein the first temperature is between 0.5° C. and 5° C. higher than the protection temperature.
18. The arrangement according to claim 1 , wherein both the first resistor and the second resistor are resistors whose resistance increases with temperature.
19. The arrangement according to claim 17 , wherein both the first resistor and the second resistor are resistors whose resistance increases with temperature.
20. The arrangement as defined in claim 17 , wherein the first resistor and the second resistor are PTC resistors.
21. The arrangement as defined in claim 17 , wherein the first resistor and the second resistor are thermally coupled to the battery.
22. An arrangement comprising:
at least one battery with two electrical contacts, a first electrical contact being connected to a first pole of the battery, and a second electrical contact being connected to a second pole of the battery; and
a parallel circuit comprising a first resistor and a second resistor and disposed between the first contact and the first pole;
wherein the first resistor is a resistor having a resistance that increases with temperature and that has a first disabling resistance value and switches in disabling fashion at a first temperature, the second resistor is a resistor having a resistance that increases with temperature and that has a second disabling resistance value and switches in disabling fashion at a second temperature, the first temperature is substantially equal or higher than a protection temperature of the battery and the second temperature is lower than the first temperature and the protection temperature, the first resistor has a higher current-carrying capacity than the second resistor, and the first disabling resistance value is similar to the second disabling resistance value;
wherein the parallel circuit is configured to one of supply and carry a total current which is split into a first partial current via the first resistor and a second partial current via the second resistor up to the second temperature, and, above the second temperature and below the first temperature, to one of supply and carry the total current via the first resistor, and, above the first temperature, to one of supply and carry substantially no current, wherein the second temperature is between 0.5° C. and 5° C. lower than the protection temperature.