Secondary battery pack including a printed circuit

1. A secondary battery pack, comprising:

a plurality of secondary battery modules including battery cells and cooling fins;

a first structure provided under the plurality of secondary battery modules and including a cooling channel; and

a second structure provided over the plurality of secondary battery modules and coupled to the first structure such that the plurality of secondary battery modules are disposed therein, the second structure including a printed circuit board,

wherein the first structure further includes:

a plate having the cooling channel formed therein;

a bracket extending along a first side of the plate configured to provide longitudinal rigidity of the plate; and

stepped parts formed over the plate configured to provide rigidity in the width direction of the plate perpendicular to the longitudinal direction and disposed apart from each other,

wherein the stepped parts are configured to partition the plurality of secondary battery modules into at least two and mount the partitioned plurality of secondary battery modules therebetween.

2. The secondary battery pack of claim 1 ,

wherein the cooling channel includes an inflow channel and an outflow channel,

wherein a coolant is introduced into the inflow channel and discharged from the outflow channel,

wherein the inflow channel is formed along a second side of the plate, and

wherein the outflow channel is formed along a third side of the plate.

3. The secondary battery pack of claim 1 ,

wherein a placing portion is defined along a fourth side of the plate,

wherein a switch member is provided in the placing portion, and

wherein the switch member includes a relay, a fuse, or both.

4. The secondary battery pack of claim 3 ,

wherein the second structure includes an opening, and

wherein the opening is formed directly over the placing portion, so that the switch member is replaceable through the opening.

5. The secondary battery pack of claim 1 ,

wherein the cooling fins are spaced apart from each other at a first interval, and

wherein each of the battery cells are disposed between the cooling fins.

6. The secondary battery pack of claim 5 ,

wherein each of the cooling fins includes an upper extension and a lower extension,

wherein the plurality of secondary battery modules, the first structure, and the second structure are stacked in a first direction,

wherein each of the cooling fins extends in the first direction,

wherein the upper extension extends from a top of each of the cooling fins in a second direction,

wherein the lower extension extends from a bottom of each of the cooling fins in the second direction,

wherein the upper extension is coupled to a neighboring upper extension to form an upper exterior of the plurality of secondary battery modules, and

wherein the lower extension is coupled to a neighboring upper extension to form a lower exterior of the plurality of secondary battery modules.

7. The secondary battery pack of claim 1 ,

wherein the plurality of secondary battery modules further include a terminal bus bar and electrode tabs,

wherein each of the electrode tabs extends from each of the battery cells,

wherein the terminal bus bar electrically connects the electrode tabs to each other, and

wherein the terminal bus bar contacts the printed circuit board.

8. The secondary battery pack of claim 1 ,

wherein the plurality of secondary battery modules further include a terminal unit and first and second electrode tabs,

wherein the battery cells include first and second battery cells,

wherein the first and the second electrode tabs extend from the first and the second battery cells, respectively,

wherein the terminal unit includes a first contact terminal and a first wing terminal,

wherein the first contact terminal is disposed between the first and the second electrode tabs and connects the first and the second electrode tabs to each other, and

wherein the first wing terminal extends outwardly from the first contact terminal.

9. The secondary battery pack of claim 8 ,

wherein the plurality of secondary battery modules further include third and fourth electrode tabs,

wherein the battery cells include third and fourth battery cells,

wherein the third battery cell is located next to the second battery cell,

wherein the third and the fourth electrode tabs extend from the third and the fourth battery cells, respectively,

wherein the terminal unit further includes a second contact terminal and a second wing terminal,

wherein the second contact terminal is disposed between the third and the fourth electrode tabs and connects the third and the fourth electrode tabs to each other,

wherein the second wing terminal extends outwardly from the second contact terminal, and

wherein the second wing terminal faces the first wing terminal.

10. The secondary battery pack of claim 9 , further including:

a jig insertion space,

wherein the jig insertion space is defined by (i) the first and the second wing terminals, (ii) the second and the third battery cells, and (iii) the second and the third electrode tabs.

11. The secondary battery pack of claim 9 , further comprising:

a terminal bus bar,

wherein the terminal bus bar is coupled to the first and the second wing terminals.

12. The secondary battery pack of claim 11 ,

wherein the terminal bus bar is coupled to the printed circuit board.

13. The secondary battery pack of claim 1 , wherein the second structure includes:

a housing;

a barrier formed in the housing; and

a wiring harness and the printed circuit board which are disposed between the housing and the barrier.

14. The secondary battery pack of claim 1 ,

wherein the printed circuit board includes a contact terminal piece configured to measure a voltage, and

wherein the contact terminal piece contacts a terminal bus bar of the plurality of secondary battery modules to measure a voltage.

15. A secondary battery pack, comprising:

a plurality of secondary battery modules including battery cells and cooling fins;

a first structure disposed below the plurality of secondary battery modules for protecting the plurality of secondary battery modules and for cooling the plurality of secondary battery modules; and

a second structure provided over the plurality of secondary battery modules and coupled to the first structure such that the plurality of secondary battery modules are disposed therein, the second structure including a printed circuit board, wherein the first structure further includes:

a plate having a cooling channel therein;

a bracket extending along a first side of the plate configured to provide longitudinal rigidity of the plate; and

stepped parts formed over the plate configured to provide rigidity in the width direction of the plate perpendicular to the longitudinal direction and disposed apart from each other such that the plurality of secondary battery modules are partitioned and mounted between the stepped parts,

wherein the measurement control circuit is configured to measure and control a voltage of the plurality of secondary battery modules.

16. The secondary battery pack of claim 15 ,

wherein the second structure includes a contact terminal piece, and

wherein the contact terminal piece is mounted on the plurality of secondary battery modules, elastically contacts the measurement control circuit and the plurality of secondary battery modules, and electrically connects the measurement control circuit and the plurality of secondary battery modules to each other.