Claims:1. A Printed Circuit Board (PCB) unit (102) for a battery pack (100), said
battery pack (100) comprises:
plurality of cells (110), each having a negative terminal (106) and a
positive terminal 5 (108), and
said PCB unit (102) comprises predetermined number and pattern of
slots (112, 114) to receive said terminals (106, 108) of said plurality
of cells (110) for interconnection, characterized in that, said PCB
unit (102) comprises
10 contact lands (116) between pairs of slots (112, 114), in which, each
pair of slots (112, 114) configured to receive terminals (106, 108)
from two different cells (110).
2. The PCB unit (102) as claimed in claim 1, wherein at least one electric
15 component is installable on said PCB unit (102), said at least one electric
component are selected from a voltage sensor, a current sensor, a
temperature sensor (thermistor), a connector (118), a Battery Disconnect
Unit (BDU) and a Battery Management System (BMS).
3. The PCB unit (102) as claimed in claim 1, comprises contact traces for the
interconnection of said contact lands (116), and thus said plurality of cells
(110), in any one of a series and parallel configuration, and for
interconnection of said contact lands (116) and said at least one electric
component.
4. The PCB unit (102) as claimed in claim 1, wherein said slots (112, 114) are
provided in poka-yoke manner.
5. The PCB unit (102) as claimed in claim 1, wherein a substrate of said PCB
30 unit (102) is made of thermally conductive material and used as terminal
holder (104).
6. A battery pack (100), said battery pack (100) comprises:
plurality of cells (110), each having a negative terminal (106) and a
positive terminal (108), and
a PCB unit (102) comprises predetermined number 5 and pattern of
slots (112, 114) to receive said terminals (106, 108) of said plurality
of cells (110) for interconnection, characterized in that, said PCB
unit (102) comprises
contact lands (116) between pairs of slots (112, 114), in which each
10 pair of slots (112, 114) configured to receive terminals (106, 108)
from two different cells (110).
7. The battery pack (100) as claimed in claim 6, wherein at least one electric
component is installable on said PCB unit (102), said at least one electric
15 component is selected from a voltage sensor, a current sensor, a temperature
sensor (thermistor), a connector (118), a Battery Disconnect Unit (BDU)
and a Battery Management System (BMS).
8. A method for assembling a Printed Circuit Board (PCB) unit (102) in a
20 battery pack (100), said battery pack (100) comprises plurality of cells (110)
having terminals (106, 108), and said PCB unit (102) comprises plurality of
slots (112, 114) to receive said terminals (106, 108), said method
comprising the steps of:
positioning said PCB unit (102) over said plurality of cells (110)
25 stacked in a predetermined order,
passing said terminals (106, 108) through pairs of slots (112, 114)
and seating said PCB unit (102) over said plurality of cells (110),
characterized by
folding groups of two terminals (106, 108) each from different cells
30 (110) one above the other over an intermediate contact land (116)
provided on said PCB unit (102), and
welding said groups of two terminals (106, 108) with respective
intermediate contact land (116) in a single step.
9. The method as claimed in claim 8, wherein said welding connects said
plurality of cells (110) in a predetermined series 5 and/or parallel
configuration along with interconnection with at least one electric
component selected from a group comprising a voltage sensor, a current
sensor, a temperature sensor (thermistor), a connector (118), a Battery
Disconnect Unit (BDU) and a Battery Management System (BMS).
10. The method as claimed in claim 8, wherein a substrate of said PCB unit (102)
is made of thermally conductive material and used as terminal holder (104). , Description:A PCB unit 102 for the battery pack 100 is provided. The battery pack 100
comprises plurality of cells 110, each having a negative terminal 106 and a positive
terminal 108. The PCB unit 102 comprises slots 112, 114 to receive the terminals
106, 108 of the plurality of cells 110 for interconnection. The PCB unit 102 is
characterized by, contact lands 116 between pairs of slots 112, 114, in which, each
pair of slots 112, 114 configured to receive terminals 106, 108 from two different
cells 110. The present invention provides a low-cost integrated concept to aggregate
the at least one electric component on a single PCB unit 102. The terminals 106,
108, along with the contact land 116 on the PCB unit 102, are all welded together
in a single step for both, series/parallel connection of cells 110 in the battery pack
100 and taps for the BMS.