Precision battery pack circuits
First Claim
1. A battery pack capable of supplying at least 50 amps of current, the battery pack comprising:
- a positive load connection terminal; and
multiple batteries each having an anode and a cathode, the cathodes of the batteries connected in parallel to the positive load connection terminal via respective and distinct conductive paths, each conductive path having an under-load resistance differing from an under-load resistance of each other path by less than about 1 milli-ohm;
wherein the multiple batteries each has a similar loaded output impedance, the first conductive paths each having a loaded series impedance at least five times greater than the loaded output impedance of the multiple batteries.
5 Assignments
0 Petitions
Accused Products
Abstract
A battery pack connection scheme is shown that provides an synchronized DC environment for every cell in the pack, such that every cell in the same or similar voltage level in the pack sees exactly the same voltage and current environment. In some embodiments, a pack is provided having a positive load connection terminal and multiple batteries connected in parallel to the terminal. The connections are made via respective conductive paths each including a high-power DC precision cable segment, each of the conductive paths having a resistance suitable to allow an average charge acceptance rate of the battery pack to be greater than a one-hour, or “C1”, charge rate. The precision cable segments preferably have matching impedances, or have matching DC resistances.
62 Citations
28 Claims
-
1. A battery pack capable of supplying at least 50 amps of current, the battery pack comprising:
-
a positive load connection terminal; and multiple batteries each having an anode and a cathode, the cathodes of the batteries connected in parallel to the positive load connection terminal via respective and distinct conductive paths, each conductive path having an under-load resistance differing from an under-load resistance of each other path by less than about 1 milli-ohm; wherein the multiple batteries each has a similar loaded output impedance, the first conductive paths each having a loaded series impedance at least five times greater than the loaded output impedance of the multiple batteries. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A battery pack comprising:
-
a positive load connection terminal; and first multiple batteries each having an anode and a cathode, the cathodes of the first multiple batteries connected in parallel to the positive load connection terminal via respective conductive paths each including a respective high-power DC precision cable segment, each of the conductive paths having a resistance suitable to allow an average charge acceptance rate of the battery pack to be greater than a C1 charge rate. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
-
28. A battery pack capable of supplying at least 50 amps of current, the battery pack comprising:
-
a positive load connection terminal; and multiple batteries each having an anode and a cathode, the cathodes of the batteries connected in parallel to the positive load connection terminal via respective and distinct conductive paths, each conductive path having an under-load resistance differing from an under-load resistance of each other path by less than about 1 milli-ohm; wherein the multiple first conductive paths each comprise a precision DC cable and a solder joint connecting each precision DC cable to its respective battery cathode, each of the solder joints having a solder joint resistance value precision matched to that of the other solder joint(s).
-
Specification