Rechargeable battery pack

Abstract

Provided is a rechargeable battery pack. The rechargeable battery pack, according to an embodiment of the present invention, comprises busbars electrically connecting a plurality of battery cells, a first connection part disposed adjacent to the busbars, and fuse assemblies each configured such that opposite sides of a primary fuse and an unconnected spare fuse are respectively connected to the busbar side and the first connection part side, so as to be selectively operated to transmit a signal detected from a busbar to the first connection part, wherein each fuse assembly comprises: a first tab and a second tab spaced apart from each other and respectively connected to a busbar and the first connection part; and a second connection part electrically connecting the first tab and the second tab via the primary fuse and the spare fuse interposed therebetween.

Description

secondary battery pack

[0001] The present invention relates to a rechargeable battery pack, and more specifically, to a rechargeable battery pack in which a busbar is connected to a flexible printed circuit (FPC).

[0002] Unlike primary batteries, rechargeable batteries are batteries that undergo repeated charging and discharging. Small-capacity rechargeable batteries are used in portable small electronic devices such as mobile phones, laptop computers, and camcorders.

[0003] Large-capacity and high-density secondary batteries are used as power sources for driving motors in hybrid and electric vehicles or for energy storage. Secondary batteries can be used by forming a secondary battery module comprising multiple battery cells connected in series and / or parallel, so as to drive a motor in a hybrid vehicle, for example, which requires relatively high energy density.

[0004] The secondary battery module is equipped with a flexible printed circuit (FPC) that detects the voltage of the busbar and transmits the detection signal to check the charge status of the battery cells. In the FPC detection structure, the FPC is soldered to a separate tab, and the tab is welded to an aluminum (Al) busbar.

[0005] One embodiment of the present invention provides a secondary battery pack that applies a flexible printed circuit (FPC) to detect voltage and transmit the detection signal in order to check the charge status of the battery cells through a bus bar connecting the battery cells.

[0006] One embodiment of the present invention provides a secondary battery pack that enables reuse even when a fuse is blown due to an unintended misassembly of an external current circuit, by providing a plurality of fuses in a fuse assembly connecting a busbar and an FPC.

[0007] A secondary battery pack according to one embodiment of the present invention comprises a busbar electrically connecting a plurality of battery cells, a first connection portion disposed adjacent to the busbar, and a fuse assembly in which both sides of a primary fuse and a secondary fuse unconnected to the busbar side and the first connection portion side are respectively connected to the busbar side and the first connection portion side so as to selectively operate to send a signal detected by the busbar to the first connection portion, wherein the fuse assembly comprises a first tab and a second tab spaced apart from each other and respectively connected to the busbar and the first connection portion, and a second connection portion electrically connecting the first tab and the second tab via the primary fuse and the secondary fuse.

[0008] The first connection part is formed as a flexible printed circuit (FPC), the first tab is connected to the bus bar by welding, and the second tab can be connected to the FPC.

[0009] The second connection part is formed of a fuse FPC (flexible printed circuit), and the fuse assembly may further include a plate that mechanically connects both sides of the fuse FPC to the first tab and the second tab.

[0010] The first tab and the second tab are spaced apart from each other and each has a tab through-hole, and the fuse FPC may have a corresponding through-hole corresponding to the tab through-hole.

[0011] The above plate can be formed from a plastic injection molded product.

[0012] The above plate is provided with a coupling projection corresponding to the corresponding through hole and the tap through hole, and after being coupled to the corresponding through hole and the tap through hole, it can be fixed by a hot stacking method.

[0013] The above basic fuse is provided with a first terminal and a second terminal at both ends, and when the coupling projection is coupled to the corresponding through hole and the tap through hole, the first terminal and the second terminal can be electrically connected to the first tap and the second tap.

[0014] The above spare fuse is provided with a third terminal and a fourth terminal at both ends, and when the coupling projection is coupled to the corresponding through hole and the tab through hole, the third terminal and the fourth terminal can be electrically connected to the first tab and the second tab.

[0015] The fuse assembly may further include a fuse bottom film supporting the lower surface of the basic fuse and the spare fuse, and a fuse top film covering the upper surface of the basic fuse and the spare fuse and hot-pressed onto the fuse bottom film.

[0016] The above spare fuse may include a first unconnected end and a second unconnected end that are disconnected in the middle, and a third terminal and a fourth terminal provided at both ends connected to the first unconnected end and the second unconnected end.

[0017] The fuse top film may have an open open opening corresponding to the gap between the first unconnected end and the second unconnected end.

[0018] The fuse assembly may further include a conductive material coupled to the unconnected opening and the gap to connect the first unconnected end and the second unconnected end to each other.

[0019] The conductive material is formed on one side of the film for the spare fuse and is supplied to the gap between the first unconnected end and the second unconnected end through the unconnected opening, thereby electrically connecting the first unconnected end and the second unconnected end.

[0020] The above film for the spare fuse may further include double-sided tape attached around the conductive material.

[0021] The first connection part is formed as a flexible printed circuit (FPC), the second connection part is formed as a fuse flexible printed circuit (FPC), the first tap is connected to the bus bar, the second tap is connected to the FPC, the first tap and the second tap are connected to the FPC, and the fuse assembly may further include a reinforcing member that mechanically reinforces the electrical connection between the first tap and the second tap by the fuse FPC.

[0022] The above fuse assembly may have the first tab and the second tab arranged in a first direction or a second direction intersecting the first direction, depending on the connection direction of the FPC.

[0023] The above basic fuse has a first terminal and a second terminal provided at both ends formed as a rectangle having a width wider than the fuse wire width, so that they can be connected to the first tap and the second tap.

[0024] The secondary battery pack of the present invention may further include a bottom film covering the plurality of battery cells, and a top film disposed on the bus bar, the first connecting part, and the fuse assembly and attached to the bottom film by hot pressing.

[0025] The top film may have an opening corresponding to the gap of the spare fuse.

[0026] In order to connect the open first and second unconnected ends of the spare fuse to each other with a conductive material through a fuse opening formed in the top film of the fuse assembly, the spare fuse film is provided with said conductive material, and the spare fuse film can be attached to the top film with double-sided tape.

[0027] A secondary battery pack of one embodiment connects a busbar and a first connection part (e.g., an FPC) to a fuse assembly, and connects the first and second taps of the fuse assembly to the busbar and the FPC (flexible printed circuit), respectively, and connects the first and second taps to one of a plurality of fuses of the fuse assembly, thereby enabling a cell contact system for detecting voltage according to the charge state of battery cells to be implemented at a low cost.

[0028] The FPC is connected to the Battery Management System (BMS). Even if one of the multiple fuses blows due to an unintended external misassembly of the current circuit, another fuse can be connected to enable the reuse of the FPC and the fuse assembly.

[0029] FIG. 1 is a partially exploded perspective view of a secondary battery pack according to one embodiment of the present invention.

[0030] FIG. 2 is an exploded perspective view of the bottom film, bus bar, first connection part (e.g., FPC), fuse assembly, and top film of FIG. 1.

[0031] FIG. 3 is a partial perspective view in which a busbar and an FPC placed on the bottom film of FIG. 1 are connected to a fuse assembly.

[0032] Figure 4 is a perspective view of the fuse assembly of Figure 3.

[0033] Figure 5 is an exploded perspective view of the fuse assembly of Figure 4.

[0034] Figure 6 is an exploded perspective view of the fuse assembly before the connection of the spare fuse.

[0035] Figure 7 is a cross-sectional view of the disassembled state cut along line VII-VII of Figure 6.

[0036] FIG. 8a is a plan view of the fuse assembly of FIG. 4, and FIG. 8b is an enlarged plan view of the separated state of the spare fuse.

[0037] Figure 9 is a plan view of the fuse assembly of Figure 4 with the basic fuse blown.

[0038] FIG. 10a is a plan view of the fuse assembly of FIG. 9 with a spare fuse connected, and FIG. 10b is an enlarged plan view of the spare fuse connection state.

[0039] FIG. 11 is a cross-sectional view of the combined state cut along line VII-VII of FIG. 6.

[0040] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. In the drawings, parts unrelated to the explanation have been omitted to clearly explain the present invention, and the same reference numerals have been used throughout the specification for identical or similar components.

[0041] FIG. 1 is a partially exploded perspective view of a secondary battery pack according to one embodiment of the present invention, and FIG. 2 is an exploded perspective view of the bottom film, bus bar, first connection part (e.g., FPC) and fuse assembly of FIG. 1. Referring to FIG. 1 and FIG. 2, a secondary battery pack of one embodiment includes a plurality of battery cells (10) formed as secondary batteries, a bus bar (30), a first connection part, and a fuse assembly (50). As an example, the first connection part may be formed of a flexible printed circuit (FPC) (40) or a printed circuit board (PCB) (not shown) disposed adjacent to the bus bar (30).

[0042] Additionally, a secondary battery pack of one embodiment may further include a bottom film (20) and a top film (60). The bottom film (20) and the top film (60) may be replaced by a molding structure. For convenience, one embodiment is described including the bottom film (20) and the top film (60).

[0043] A secondary battery pack includes a cell contact system that contacts a plurality of battery cells (10). The cell contact system includes a bottom film (20), a bus bar (30), a flexible printed circuit (FPC) (40), a fuse assembly (50), and a top film (60).

[0044] The secondary battery pack of one embodiment may have various structures, but a detailed description of this configuration is omitted and described as an example. A plurality of battery cells (10) are formed as prismatic secondary batteries and stacked in a first direction (x-axis direction).

[0045] The wide side of the battery cells (10) faces the first direction (x-axis direction), and the narrow side faces the second direction (y-axis direction) which intersects the first direction (x-axis direction). The battery cells (10) form a row along the first direction (x-axis direction) and arrange another row adjacently in the second direction (y-axis direction) to form two parallel rows overall. That is, the battery cells (10) form a secondary battery pack of two rows.

[0046] The bottom film (20) includes a busbar support (21) for connecting electrode terminals (not shown) of a plurality of battery cells (10) and insulating the electrode terminals, and a vent (22) for discharging gas discharged from the vents of the battery cells (10) to the outside. The vent (22) is spaced apart from the busbar support (21) in a second direction (y-axis direction).

[0047] The busbar support (21) covers the parts other than the electrode terminals of the battery cells (10) while supporting a busbar (30) that connects the electrode terminals of adjacent unit cells (10) in series or parallel by exposing the electrode terminals of the battery cells (10) in a third direction (z-axis direction) that intersects the second direction (y-axis direction).

[0048] A busbar (30) is placed on a bottom film (20) and electrically connects battery cells (10) through an opening (211) formed in the bottom film (20). An opening (211) is formed in the busbar support (21) to expose the electrode terminals of the battery cells (10).

[0049] A flexible printed circuit (FPC) (40) is placed on a bottom film (20). The FPC (40) is attached to a bus bar (30) and is configured to detect the voltage flowing according to the charge state of the battery cells (10) in the bus bar (30), which electrically connects the electrode terminals of the battery cells (10), and to send the detection signal to a battery management system (BMS).

[0050] The FPC (40) can be divided into one or more parts depending on the number of battery cells (10) used in the secondary battery pack. In one embodiment, the FPC (40) is divided into three parts. Therefore, if a part of the FPC (40) is damaged during the manufacturing process, only that part of the FPC (40) can be discarded, which reduces costs compared to discarding the entire FPC (not shown) formed as a single unit without division.

[0051] The fuse assembly (50) has both sides of a primary fuse (545) and an unconnected spare fuse (546) electrically connected to the busbar (30) and the FPC (40), respectively, so as to operate optionally to send a voltage signal detected by the busbar (30) to the FPC (40). The fuse assembly (50) will be described in detail below.

[0052] The top film (60) is placed on the busbar (30), FPC (40), and fuse assembly (50) and attached to the bottom film (20) by hot press. The top film (60) has an opening corresponding to the opening of the bottom film (20). That is, the opening of the top film (60) partially opens each part of the busbars (30) and the vent part (22). The busbar cover part (61) corresponding to the busbar support part (21) opens each part of the busbars (30) to enable heat dissipation of the busbars (30), and the vent part (62) prevents the operation of the bottom film (20) vent part (22) from being obstructed.

[0053] FIG. 3 is a partial perspective view in which a busbar and an FPC are connected to a fuse assembly placed on the bottom film of FIG. 1, FIG. 4 is a perspective view of the fuse assembly of FIG. 3, and FIG. 5 is an exploded perspective view of the fuse assembly of FIG. 4. Referring to FIG. 3 to FIG. 5, the fuse assembly (50) includes a first tab (51), a second tab (52), and a second connecting part.

[0054] The fuse assembly (50) is positioned in a first direction (x-axis direction) or a second direction (y-axis direction) depending on the connection direction of the FPC (40). For example, the second connection may be formed of a fuse FPC (flexible printed circuit) (53) or a PCB (printed circuit board) (not shown).

[0055] That is, the fuse assembly (50) can be arranged lengthwise in the first direction (x-axis direction) or lengthwise in the second direction (y-axis direction). For convenience, in this embodiment, the fuse assembly (50) arranged lengthwise in the first direction (x-axis direction) is described as an example.

[0056] The first tap (51) and the second tap (52) are spaced apart from each other in the first direction (x-axis direction) and are connected to the bus bar (30) and the FPC (40), respectively. The fuse FPC (53) electrically connects the first tap (51) and the second tap (52) to each other and is equipped with a fuse (54). Thus, the bus bar (30) and the FPC (40) are electrically connected to each other through the fuse (54).

[0057] The first tab (51) is connected to the busbar (30) by welding. That is, the first tab (51) and the busbar (30) are electrically and mechanically connected. The second tab (52) describes an electrical and mechanical connection to the FPC (40). For example, the second tab (52) can be formed as a nickel tab. The nickel tab can be effectively bonded to the copper pattern of the FPC (40).

[0058] Additionally, the fuse assembly (50) may further include a plate (55). The plate (55) mechanically connects both sides of the fuse FPC (53) in the first direction (x-axis direction) to the first tab (51) and the second tab (52).

[0059] The first tab (51) and the second tab (52) are spaced apart from each other and each has a tab through-hole (511, 521). The fuse FPC (53) has corresponding through-holes (531, 532) corresponding to the tab through-holes (511, 521). Since the tab through-hole (511) of the first tab (51) is formed as two and the tab through-hole (521) of the second tab (52) is formed as two, the corresponding through-holes (531, 532) of the fuse FPC (53) are formed as four.

[0060] For example, the plate (55) may be formed from a plastic injection molded product. The plate (55) is provided with a coupling projection (551, 552) corresponding to the corresponding through hole (531, 532) and the tap through hole (511, 521), and after being coupled to the corresponding through hole (531, 532) and the tap through hole (511, 521), it is fixed by a hot stacking method.

[0061] The plate (55) acts as a reinforcing member that mechanically reinforces the electrical connection between the first tab (51) and the second tab (52) by the fuse FPC (53). That is, the plate (55) protects the fuse FPC (53) and the fuse (54), which are the mechanically weakest parts of the fuse assembly (50). Thus, the plate (55) prevents the fuse (54) from being broken by mechanical tension, even though it may be broken by overcurrent.

[0062] In the fuse FPC (53), the basic fuse (545) is provided with a first terminal (541) and a second terminal (542) at both ends. When the coupling protrusions (551, 552) are coupled to the corresponding through holes (531, 532) and the tap through holes (511, 521), the first terminal (541) and the second terminal (542) are electrically connected to the first tap (51) and the second tap (52).

[0063] In the fuse FPC (53), the spare fuse (546) is provided with a third terminal (543) and a fourth terminal (544) at both ends. When the coupling projections (551, 552) are coupled to the corresponding through holes (531, 532) and the tap through holes (511, 521), the third terminal (543) and the fourth terminal (544) are electrically connected to the first tap (51) and the second tap (52) (see FIG. 7 and FIG. 11).

[0064] FIG. 6 is an exploded perspective view of a fuse assembly before the connection of a spare fuse, and FIG. 7 is a cross-sectional view of the exploded state cut along line VII-VII of FIG. 6. Referring to FIG. 6 and FIG. 7, the fuse assembly (50) further includes a fuse bottom film (53a) that supports the lower surface of a primary fuse (545) and a spare fuse (546), and a fuse top film (53b) that covers the upper surface of the primary fuse (545) and the spare fuse (546) and is hot-pressed onto the fuse bottom film (53a).

[0065] The fuse bottom film (53a) and the fuse top film (53b) form a fuse FPC (53) including a basic fuse (545) and a spare fuse (546). Although not illustrated, the fuse FPC may also be formed by providing a separate bottom film in addition to the fuse bottom film.

[0066] The spare fuse (546) includes a first unconnected end (546a) and a second unconnected end (546b) that are disconnected in the middle, and a third terminal (543) and a fourth terminal (544) provided at both ends, each connected to the first unconnected end (546a) and the second unconnected end (546b), respectively. The third terminal (543) is electrically connected to the first tap (51), and the fourth terminal (544) is electrically connected to the second tap (52) (see FIG. 7 and FIG. 11).

[0067] The fuse top film (53b) has an open opening (53c) that is open in correspondence with a gap (G) set between the first unconnected end (546a) and the second unconnected end (546b). The fuse assembly (50) further includes a conductive material (546c) that is coupled to the unconnected opening (53c) and the gap (G) to connect the first unconnected end (546a) and the second unconnected end (546b) to each other.

[0068] A conductive material (546c) is formed on one side of a film (53d) for a spare fuse and is supplied to the gap (G) between the first unconnected end (546a) and the second unconnected end (546b) via the unconnected opening (53c) to electrically connect the first unconnected end (546a) and the second unconnected end (546b).

[0069] The spare fuse film (53d) further includes a double-sided tape (53e) attached around the conductive material (546c). When the conductive material (546c) electrically connects the gap (G) between the first unconnected end (546a) and the second unconnected end (546b), the double-sided tape (53e) secures the spare fuse film (53d) to strengthen the connection structure of the conductive material (546c).

[0070] Meanwhile, in the battery pack, the top film (60) is placed on the busbar (30), FPC (40), and fuse assembly (50) and attached to the bottom film (20) by hot pressing. The top film (60) has an opening (61) at a position corresponding to the unconnected opening (53c) of the fuse top film (53b) and the gap (G) between the first unconnected end (546a) and the second unconnected end (546b). That is, the opening (61) is formed corresponding to the gap (G) of the spare fuse (546).

[0071] In this case, when the conductive material (546c) electrically connects the gap (G) between the first unconnected end (546a) and the second unconnected end (546b), the double-sided tape (53e) secures the spare fuse film (53d) to the top film (60), thereby making the connection structure of the conductive material (546c) robust.

[0072] Although not illustrated, to aid understanding, the illustration is described using the illustrated reference numerals. When the opening (61) has a size to accommodate the spare fuse film (53d), the double-sided tape (53e) may attach the spare fuse film (53d) to the fuse top film (53b) to strengthen the connection structure of the conductive material (546c).

[0073] FIG. 8a is a plan view of the fuse assembly of FIG. 4, and FIG. 8b is an enlarged plan view of the separated state of the spare fuse. Referring to FIG. 8, the main fuse (545) and the spare fuse (546) have a line width (W1) formed by repeating the sequence of the first direction (x-axis direction), the negative (-) positive (+) second direction (y-axis direction), the first direction (x-axis direction), and the positive (+) negative (-) second direction (y-axis direction) with respect to the first direction (x-axis direction) and the second direction (y-axis direction).

[0074] The basic fuse (545) is formed with a first terminal (541) and a second terminal (542) provided at both ends, which are formed as a rectangle with a width (W2) wider than the line width (W1) and connected to the first tap (51) and the second tap (52). The narrow line width (W1) sets the operating overcurrent value at which the basic fuse (545) blows. The first and second terminals (541, 542) with a wide width (W2) secure the electrical connection with the first and second taps (51, 52).

[0075] The spare fuse (546) is formed into a rectangle with a width (W2) wider than the line width (W1) for the third terminal (543) and the fourth terminal (544) provided at both ends, and is connected to the first tap (51) and the second tap (52). The narrow line width (W1) sets the operating overcurrent value at which the spare fuse (546) blows. The wide width (W2) ensures that the third and fourth terminals (543, 544) provide a solid electrical connection to the first and second taps (51, 52).

[0076] By using a fuse assembly (50) equipped with such basic fuses (545) and spare fuses (546) and an FPC (40), a busbar (30) and a battery management system (BMS) are connected, thereby enabling a cell contact system for detecting the charge status of battery cells (10) to be implemented at a low cost.

[0077] The fuse assembly (50) is installed in the secondary battery pack in the state shown in FIG. 8a and FIG. 8b. That is, the primary fuse (545) electrically connects the first and second taps (51, 52) and maintains the disconnected state of the spare fuse (546).

[0078] FIG. 9 is a plan view of the fuse assembly of FIG. 4 with the primary fuse blown. Referring to FIG. 9, the primary fuse (545) may be blown due to an unintended external current circuit misassembly in the secondary battery pack, and the primary fuse (545) is in a blown state.

[0079] FIG. 10a is a plan view of the fuse assembly of FIG. 9 with a spare fuse connected, FIG. 10b is an enlarged plan view of the connection state of the spare fuse, and FIG. 11 is a cross-sectional view of the combined state cut along the line X-X of FIG. 6.

[0080] Referring to FIGS. 10 and 11, a conductive material (546c) is inserted into the gap (G) between the first unconnected end (546a) and the second unconnected end (546b) of the spare fuse (546) so that the gap (G) between the first unconnected end (546a) and the second unconnected end (546b) can be electrically connected, and the spare fuse (546) is connected.

[0081] At this time, the spare fuse film (53d) is attached to the top film (60) through double-sided tape (53e) attached around the conductive material (546c), thereby strengthening the structure in which the conductive material (546c) electrically connects the first unconnected end (546a) and the second unconnected end (546b).

[0082] Even if multiple basic fuses (545) are blown due to an unintended misassembly of the current circuit from the outside, a spare fuse (546) is connected to enable the reuse of the FPC (40) and the fuse assembly (50). Thus, the cell contact system can be implemented at a low cost.

[0083] Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto and can be implemented with various modifications within the scope of the claims, the description of the invention, and the attached drawings, and it is obvious that such modifications also fall within the scope of the present invention.

[0084] - Explanation of the symbols -

[0085] 10: Battery cell 20: Bottom film

[0086] 21: Busbar support 22, 62: Vent

[0087] 30: Busbar 40: FPC

[0088] 50: Fuse assembly 51: First tap

[0089] 52: 2nd Tap 53: Fuse FPC

[0090] 53c: Unconnected opening 53d: Film for spare fuse

[0091] 53e: Double-sided tape 54: Fuse

[0092] 55: Plate 60: Top Film

[0093] 61: Busbar cover 211: Opening

[0094] 511, 521: Tap through-holes 531, 532: Corresponding through-holes

[0095] 541: 1st terminal 542: 2nd terminal

[0096] 543: 3rd terminal 544: 4th terminal

[0097] 545: Primary fuse 546: Spare fuse

[0098] 546a: 1st unconnected end 546b: 2nd unconnected end

[0099] 546c: Conductive material 551, 552: Bonding protrusions

[0100] G: Gap W1: Line width

[0101] W2: Width

Claims

1. A busbar that electrically connects multiple battery cells; A first connecting part disposed adjacent to the above busbar; and A fuse assembly in which both sides of a primary fuse and an unconnected spare fuse are respectively connected to the busbar side and the first connection side to selectively operate in order to send a signal detected by the busbar to the first connection part. Includes, The above fuse assembly A first tab and a second tab spaced apart from each other and respectively connected to the busbar and the first connecting part, and A second connecting part that electrically connects the first tap and the second tap by interposing the basic fuse and the spare fuse. A secondary battery pack including 2. In Paragraph 1, The above first connection part is formed of an FPC (flexible printed circuit), and The above first tap is connected to the above busbar by welding, and The second tab above is a secondary battery pack connected to the FPC.

3. In Paragraph 1, The above second connection part is formed with a fuse FPC (flexible printed circuit), and The above fuse assembly A secondary battery pack further comprising a plate that mechanically connects both sides of the fuse FPC to the first tab and the second tab.

4. In Paragraph 3, The above first tab and the above second tab are They are spaced apart from each other and each is equipped with a tap through hole, The above fuse FPC is A secondary battery pack having a corresponding through hole corresponding to the above-mentioned tab through hole.

5. In Paragraph 4, The above plate is A secondary battery pack formed from plastic injection molding.

6. In Paragraph 5, The above plate is A secondary battery pack having a coupling projection corresponding to the corresponding through hole and the tab through hole, which is coupled to the corresponding through hole and the tab through hole and then fixed by a hot stacking method.

7. In Paragraph 5, The above basic fuse is equipped with a first terminal and a second terminal at both ends, and When the above coupling projection is coupled to the corresponding through hole and the tab through hole, A secondary battery pack in which the first terminal and the second terminal are electrically connected to the first tab and the second tab.

8. In Paragraph 5, The above spare fuse is equipped with a third terminal and a fourth terminal at both ends, and When the above coupling projection is coupled to the corresponding through hole and the tab through hole, A secondary battery pack in which the third terminal and the fourth terminal are electrically connected to the first tab and the second tab.

9. In Paragraph 1, The above fuse assembly A fuse bottom film supporting the lower surface of the above basic fuse and the above spare fuse, and A secondary battery pack further comprising a fuse top film that covers the upper surface of the above basic fuse and the above spare fuse and is hot-pressed onto the above fuse bottom film.

10. In Paragraph 9, The above spare fuse is The first unconnected end and the second unconnected end that are severed in the middle, and A secondary battery pack comprising a third terminal and a fourth terminal provided at both ends, connected to the first unconnected end and the second unconnected end.

11. In Paragraph 10, The above fuse top film is A secondary battery pack having an open opening corresponding to the gap between the first open end and the second open end.

12. In Paragraph 11, The above fuse assembly A secondary battery pack further comprising a conductive material coupled to the above-mentioned unconnected opening and the above-mentioned gap, connecting the first unconnected end and the second unconnected end to each other.

13. In Paragraph 12, The above conductive material is Formed on one side of the above-mentioned film for the spare fuse, A secondary battery pack that is supplied to the gap between the first unconnected terminal and the second unconnected terminal via the unconnected opening to electrically connect the first unconnected terminal and the second unconnected terminal.

14. In Paragraph 13, The above film for the spare fuse is A secondary battery pack further comprising double-sided tape attached around the conductive material.

15. In Paragraph 1, The above first connection part is formed of an FPC (flexible printed circuit), and The above second connection part is formed with a fuse FPC (flexible printed circuit), and The first tab above is connected to the busbar, and The above second tap is connected to the above FPC, and The first tab and the second tab are connected to the FPC, and The above fuse assembly A secondary battery pack further comprising a reinforcing member that mechanically reinforces the electrical connection between the first tab and the second tab by the fuse FPC.

16. In Paragraph 15, The above fuse assembly A secondary battery pack in which the first tab and the second tab are arranged in a first direction or a second direction intersecting the first direction, depending on the connection direction of the above FPC.

17. In Paragraph 16, The above basic fuse is The first and second terminals provided at both ends are formed into a rectangle having a width wider than the fuse wire width, A secondary battery pack connected to the first tab and the second tab above.

18. In Paragraph 1, A bottom film covering the plurality of battery cells, and A secondary battery pack further comprising the above-mentioned busbar, the above-mentioned first connecting part, and the above-mentioned fuse assembly and a top film attached to the bottom film by hot pressing.

19. In Paragraph 18, The above top film is A secondary battery pack having an opening corresponding to the gap of the above-mentioned spare fuse.

20. In Paragraph 18, In order to connect the open first and second unconnected ends of the spare fuse to each other with a conductive material through a fuse opening formed in the top film of the fuse assembly, the film for the spare fuse is provided with the conductive material. A secondary battery pack in which the above-mentioned film for the spare fuse is attached to the above-mentioned top film with double-sided tape.

Images