Thermal management systems for battery packs
A cordless power tool has a housing which includes a mechanism to couple with a removable battery pack. The battery pack includes one or more battery cells as well as a system to dissipate heat from the battery pack.
1. A cordless power tool, comprising:
a tool housing;
a motor mounted to said tool housing;
a tool electronic control disposed within said tool housing, said tool electronic control configured to perform a programmed operation; and
a battery pack connected to said tool housing, said battery pack including a battery electronic control connectable to said tool electronic control.
2. The cordless power tool according to claim 1 , wherein said tool electronic control is powered by a power supply in said battery pack.
3. The cordless power tool according to claim 1 , further comprising a switch disposed on said tool housing wherein activation of said switch causes said battery electronic control to change from a dormant mode of operation to an active mode of operation.
4. The cordless power tool according to claim 1 , further comprising a battery charger unit including a charger electronic control that is connectable to said battery electronic control.
5. The cordless power tool according to claim 1 , further comprising a temperature sensor in said battery pack, said temperature sensor providing a temperature signal to said battery electronic control.
6. The cordless power tool according to claim 5 , wherein said temperature sensor is connectable to said tool electronic control for providing said temperature signal to said tool electronic control.
7. The cordless power tool according to claim 1 , further comprising a battery pack identification component including stored information regarding battery characteristics.
8. The cordless power tool according to claim 7 , wherein said battery pack identification component is connectable to said tool electronic control for providing said stored information regarding battery characteristics to said tool electronic control.
9. The cordless power tool according to claim 7 , wherein said battery pack identification component is connectable to a charger electronic control for providing said stored information regarding battery characteristics to said charger electronic control.
10. The cordless power tool according to claim 1 , wherein said battery electronic control controls a pulse width modulated duty cycle of current delivered by said at least one battery to said motor to control a speed of said motor.
11. A cordless power tool, comprising:
a tool housing;
a motor mounted to said tool housing;
a tool electronic control disposed within said tool housing;
a battery pack connected to said tool housing, said battery pack including a battery electronic control connectable to said tool electronic control; and
a temperature sensor in said battery pack, said temperature sensor providing a temperature signal to said baterry electronic control, said temperature sensor connectable to said tool electronic control for providing said temperature signal to said tool electronic control.
12. The cordless power tool according to claim 11 , wherein said tool electronic control is powered by a power supply in said battery pack.
13. The cordless power tool according to claim 11 , further comprising a switch disposed on said tool housing wherein activation of said switch causes said battery electronic control to change from a dormant mode of operation to an active mode of operation.
14. The cordless power tool according to claim 11 , further comprising a battery charger unit including a charger electronic control that is connectable to said battery electronic control.
15. The cordless power tool according to claim 11 , further comprising a battery pack identification component including stored information regarding battery characteristics.
16. The cordless power tool according to claim 15 , wherein said battery pack identification component is connectable to said tool electronic control for providing said stored information regarding battery characteristics to said tool electronic control.
17. The cordless power tool according to claim 15 , wherein said battery pack identification component is connectable to a charger electronic control for providing said stored information regarding battery characteristics to said charger electronic control.
18. The cordless power tool according to claim 11 , wherein said battery electronic control controls a pulse width modulated duty cycle of current delivered by said at least one battery to said motor to control a speed of said motor.
19. A cordless power tool, comprising:
a tool housing;
a motor mounted to said tool housing;
a tool electronic control disposed within said tool housing, said tool electronic control configured to perform a programmed operation;
a battery pack connected to said tool housing, said battery pack including a battery electronic control connectable to said tool electronic control; and
a battery pack identification component including stored information regarding battery characteristics, said battery pack identification component connectable to said tool electronic control for providing said stored information regarding battery characteristics to said tool electronic control.
20. The cordless power tool according to claim 19 , wherein said tool electronic control is powered by a power supply in said battery pack.
21. The cordless power tool according to claim 19 , further comprising a switch disposed on said tool housing wherein activation of said switch causes said battery electronic control to change from a dormant mode of operation to an active mode of operation.
22. The cordless power tool according to claim 19 , further comprising a battery charger unit including a charger electronic control that is connectable to said battery electronic control.
23. The cordless power tool according to claim 19 , further comprising a temperature sensor in said battery pack, said temperature sensor providing a temperature signal to said battery electronic control.
24. The cordless power tool according to claim 23 , wherein said temperature sensor is connectable to said tool electronic control for providing said temperature signal to said tool electronic control.
25. The cordless power tool according to claim 19 , wherein said battery pack identification component is connectable to a charger electronic control for providing said stored information regarding battery characteristics to said charger electronic control.
26. The cordless power tool according to claim 19 , wherein said battery electronic control controls a pulse width modulated duty cycle of current delivered by said at least one battery to said motor to control a speed of said motor.