Battery Assembly

Abstract

According to an exemplary embodiment, a battery assembly is provided, the battery assembly including a cell stack including first to third pouch-type battery cells, and a first busbar assembly, the first busbar assembly including a first integrated circuit coupled to the first busbar frame and configured to measure potentials of the second negative electrode lead and the third positive electrode lead, and a first wire configured to be electrically connected to the first integrated circuit and the third positive electrode lead.

Description

[Technical field]

[0001] The present invention relates to a battery assembly. This application claims the benefit of Korean Application No. 10-2022-0179170, filed on December 20, 2022, and Korean Application No. 10-2023-0035250, filed on March 17, 2023, which applications are hereby incorporated by reference in their entireties. [Background technology]

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for a variety of wireless devices such as handsets, laptops, and wireless vacuum cleaners. In recent years, the manufacturing cost per unit capacity of secondary batteries has dramatically decreased due to improvements in energy density and economies of scale, and as the driving range of BEVs (battery electric vehicles) increases to a level comparable to that of fuel-powered vehicles, the main use of secondary batteries is shifting from mobile devices to mobility.

[0003] The trend in technological development of secondary batteries for mobility is to improve energy density and safety. Here, the energy density of a secondary battery is the maximum electrical energy that can be stored in the secondary battery divided by the mass of the secondary battery. Since a high energy density of a secondary battery is directly linked to the driving efficiency and driving range of mobility, various researches are being conducted to improve the energy density of secondary batteries. Summary of the Invention [Problem to be solved by the invention]

[0004] The problem that the technical idea of ​​the present invention aims to solve is to provide an assembly with increased energy density. [Means for solving the problem]

[0005] According to an exemplary embodiment of the present invention for solving the above-mentioned problems, a battery assembly is provided, the battery assembly includes a cell stack including a first pouch-type battery cell, a second pouch-type battery cell, and a third pouch-type battery cell, the first pouch-type battery cell including a first positive electrode lead and a first negative electrode lead, the second pouch-type battery cell including a second positive electrode lead and a second negative electrode lead, and the third pouch-type battery cell including a third positive electrode lead and a third negative electrode lead, and a first bus bar assembly coupled to the cell stack, the first bus bar assembly including a first bus bar frame, a first bus bar coupled to the first positive electrode lead and configured to output a voltage of the cell stack, a first integrated circuit coupled to the first bus bar frame and configured to measure a potential of the second negative electrode lead and the third positive electrode lead, and a first wire configured to be electrically connected to the first integrated circuit and the third positive electrode lead.

[0006] The battery assembly further includes a first contact pad disposed on the first integrated circuit and in contact with the first wire.

[0007] The first contact pad comprises nickel.

[0008] The first integrated circuit contacts the first wire.

[0009] The first wire contacts the third positive lead.

[0010] The first positive lead, the second negative lead and the third positive lead are disposed on a front surface of the cell stack, and the first bus bar frame covers the front surface of the cell stack.

[0011] The battery assembly includes a second bus bar assembly coupled to the cell stack.

[0012] The second busbar assembly includes a second busbar frame, a second integrated circuit coupled to the second busbar frame and configured to measure an electrical potential of the first negative lead and the second positive lead, and a second wire configured to be electrically coupled to the second integrated circuit and the second positive lead.

[0013] The battery assembly further includes a second contact pad disposed on the second integrated circuit and in contact with the second wire.

[0014] The second integrated circuit contacts the second wire.

[0015] The second wire contacts the second positive lead.

[0016] The first negative electrode lead, the second positive electrode lead and the third negative electrode lead are disposed on a rear surface of the cell stack, and the second bus bar frame covers the rear surface of the cell stack.

[0017] According to an exemplary embodiment, a battery assembly is provided, the battery assembly including a cell stack including a plurality of pouch-type battery cells, each of the plurality of pouch-type battery cells including a positive electrode lead and a negative electrode lead, and a first busbar assembly coupled to the cell stack, the first busbar assembly including a first busbar frame, a first integrated circuit coupled to the first busbar frame and configured to measure an electric potential of any one of the positive electrode lead and the negative electrode lead of each of the plurality of pouch-type battery cells, and a plurality of first wires configured to electrically couple any one of the positive electrode lead and the negative electrode lead of each of the plurality of pouch-type battery cells to the first integrated circuit.

[0018] The battery assembly further includes a plurality of first contact pads disposed on the first integrated circuit and in contact with the plurality of first wires.

[0019] The first integrated circuit contacts the first plurality of wires.

[0020] The first wires contact the positive electrode leads of each of the pouch-type battery cells. Effect of the Invention

[0021] The battery assembly according to the exemplary embodiment of the present invention does not include a module frame, and the bus bars for measuring the potentials of multiple nodes inside the battery assembly are replaced with wires, which may improve the energy density of the battery assembly.

[0022] Effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by a person having ordinary skill in the art to which the exemplary embodiments of the present disclosure belong from the following description. That is, unintended effects accompanying the implementation of the exemplary embodiments of the present disclosure can also be derived from the exemplary embodiments of the present disclosure by a person having ordinary skill in the art. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view of a battery assembly according to an exemplary embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of a battery assembly according to an exemplary embodiment; [Diagram 3] FIG. 2 is a perspective view of an assembly including a portion of the battery assembly. [Figure 4] FIG. 4 is a front view of the assembly of FIG. 3. [Diagram 5] FIG. 5 is a partial front view showing an enlarged portion of FIG. 4. [Figure 6] FIG. 4 is a rear view of the assembly of FIG. 3. [Figure 7] The corresponding part in FIG. 5 is shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Before that, the terms and words used in the specification and claims should not be interpreted limitedly to their ordinary or dictionary meanings, but should be interpreted as meanings and concepts that are consistent with the technical idea of ​​the present invention, based on the principle that the inventor can appropriately define the concept of the term to best describe his own invention.

[0025] Therefore, the embodiment described in this specification and the configurations shown in the drawings are merely the most preferred embodiment of the present invention and do not represent the entire technical idea of ​​the present invention, and there may be various equivalents and modifications that can replace them at the time of this application.

[0026] In addition, in the description of the present invention, if it is determined that a specific description of related publicly known configurations or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0027] Since the embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or shown roughly for clearer explanation. Therefore, the sizes and proportions of each component do not completely reflect the actual sizes and proportions.

[0028] (First embodiment) FIG. 1 is a perspective view of a battery assembly according to an exemplary embodiment.

[0029] FIG. 2 is an exploded perspective view of a battery assembly according to an exemplary embodiment.

[0030] 3 is a perspective view of an assembly ASSY including a portion of the configuration of the battery assembly 100. More specifically, the assembly ASSY includes a first cell stack 110, a first bus bar assembly 120, a second bus bar assembly 130, and an FFC assembly (Flat Flexible Cable) 140.

[0031] FIG. 4 is a front view of the assembly ASSY of FIG.

[0032] FIG. 5 is an enlarged partial front view of the partial POR of FIG.

[0033] FIG. 6 is a rear view of the assembly ASSY of FIG.

[0034] 1 to 6, a battery assembly 100 may include a cell stack 110, a first bus bar assembly 120, a second bus bar assembly 130, an FFC assembly 140, a first insulating cover 150, and a second insulating cover 160.

[0035] The cell stack 110 may include first to sixteenth battery banks BNK1, BNK2, BNK3, BNK4, BNK5, BNK6, BNK7, BNK8, BNK9, BNK10, BNK11, BNK12, BNK13, BNK14, BNK15, and BNK16 (hereinafter, BNK1 to BNK16). Each of the first to sixteenth battery banks BNK1 to BNK16 may include a plurality of (e.g., three) pouch-type battery cells 111. Each of the pouch-type battery cells 111 may be a bidirectional cell. That is, the positive electrode leads P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12, P13, P14, P15, and P16 of the pouch-type battery cell 111 may be disposed at one end of the pouch-type battery cell 111, and the negative electrode leads N1, N2, N3, N4, N5, N6, N7, N8, N9, N10, N11, N12, N13, N14, N15, and N16 of the pouch-type battery cell 111 may be disposed opposite the positive electrode leads P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12, P13, P14, P15, and P16. In the following, an embodiment of the battery assembly 100 including 16 battery banks (i.e., 48 pouch-type battery cells 111) is described, and the number of battery banks can be changed depending on the design of the battery assembly.

[0036] Each of the pouch-type battery cells 111 of the first battery bank BNK1 may be referred to as a first pouch-type battery cell. Each of the pouch-type battery cells 111 of the second battery bank BNK2 may be referred to as a second pouch-type battery cell. Each of the pouch-type battery cells 111 of the third battery bank BNK3 may be referred to as a third pouch-type battery cell. Each of the pouch-type battery cells 111 of the fourth battery bank BNK4 may be referred to as a fourth pouch-type battery cell. Each of the pouch-type battery cells 111 of the fifth battery bank BNK5 may be referred to as a fifth pouch-type battery cell. Each of the pouch-type battery cells 111 of the sixth battery bank BNK6 may be referred to as a sixth pouch-type battery cell. Each of the pouch-type battery cells 111 of the seventh battery bank BNK7 may be referred to as a seventh pouch-type battery cell. Each of the pouch-type battery cells 111 of the eighth battery bank BNK8 may be referred to as an eighth pouch-type battery cell. Each of the pouch-type battery cells 111 of the ninth battery bank BNK9 may be referred to as a ninth pouch-type battery cell. Each of the pouch-type battery cells 111 of the tenth battery bank BNK10 may be referred to as a tenth pouch-type battery cell. Each of the pouch-type battery cells 111 of the eleventh battery bank BNK11 may be referred to as an eleventh pouch-type battery cell. Each of the pouch-type battery cells 111 of the twelfth battery bank BNK12 may be referred to as a twelfth pouch-type battery cell. Each of the pouch-type battery cells 111 of the thirteenth battery bank BNK13 may be referred to as a thirteenth pouch-type battery cell. Each of the pouch-type battery cells 111 of the fourteenth battery bank BNK14 may be referred to as a fourteenth pouch-type battery cell. Each of the pouch-type battery cells 111 of the fifteenth battery bank BNK15 may be referred to as a fifteenth pouch-type battery cell. Each of the pouch-type battery cells 111 of the sixteenth battery bank BNK16 may be referred to as a sixteenth pouch-type battery cell.

[0037] Each of the pouch-type battery cells 111 of the first battery bank BNK1 may include a first positive electrode lead P1 and a first negative electrode lead N1, each of the pouch-type battery cells 111 of the second pouch-type battery cell BNK2 may include a second positive electrode lead P2 and a second negative electrode lead N2, each of the pouch-type battery cells 111 of the third battery bank BNK3 may include a third positive electrode lead P3 and a third negative electrode lead N3, and each of the pouch-type battery cells 111 of the fourth pouch-type battery cell BNK4 may include a fourth positive electrode lead P4 and a fourth negative electrode lead N4. Each of the pouch-type battery cells 111 of the fifth battery bank BNK5 may include a fifth positive lead P5 and a fifth negative lead N5, each of the pouch-type battery cells 111 of the sixth pouch-type battery cell BNK6 may include a sixth positive lead P6 and a sixth negative lead N6, each of the pouch-type battery cells 111 of the seventh battery bank BNK7 may include a seventh positive lead P7 and a seventh negative lead N7, and each of the pouch-type battery cells 111 of the eighth pouch-type battery cell BNK8 may include an eighth positive lead P8 and a fifth negative lead N9. and an eighth negative lead N8, each of the pouch-type battery cells 111 of the ninth battery bank BNK9 may include a ninth positive lead P9 and a ninth negative lead N9, each of the pouch-type battery cells 111 of the tenth pouch-type battery cell BNK10 may include a tenth positive lead P10 and a tenth negative lead N10, each of the pouch-type battery cells 111 of the eleventh battery bank BNK11 may include an eleventh positive lead P11 and an eleventh negative lead N11, and each of the pouch-type battery cells 111 of the twelfth pouch-type battery cell BNK12 may include a ninth positive lead P9 and a ninth negative lead N9, each of the pouch-type battery cells 111 of the 13th battery bank BNK13 may include a 13th positive lead P13 and a 13th negative lead N13; each of the pouch-type battery cells 111 of the 14th pouch-type battery cell BNK14 may include a 14th positive lead P14 and a 14th negative lead N14; and each of the pouch-type battery cells 111 of the 15th battery bank BNK15 may include a 15th positive lead P15 and a 15th negative lead N15;Each of the pouch-type battery cells 111 of the 16th pouch-type battery cell BNK16 may include a 16th positive electrode lead P16 and a 16th negative electrode lead N16.

[0038] Each of the plurality of pouch-type battery cells 111 is a basic unit of a lithium ion battery, i.e., a secondary battery. Each of the plurality of pouch-type battery cells 111 may include a pouch case of an aluminum laminate sheet and an electrode assembly housed in the pouch case. The electrode assembly housed in the pouch case includes a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The electrode assemblies are classified into a jelly roll type and a stack type according to the form of assembly. The jelly roll type is a roll of a positive electrode, a negative electrode, and a separator interposed therebetween. The stack type includes a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed therebetween, which are stacked in sequence.

[0039] The pouch-type battery cells 111 of the first battery bank BNK1 may be connected in parallel to each other. The same applies to the second to sixteenth battery banks BNK2 to BNK16. The first to sixteenth battery banks BNK1 to BNK16 may be connected in series to each other. As a result, the first to sixteenth battery cells may also be connected in series.

[0040] More specifically, the first negative electrode lead N1 may be connected to the second positive electrode lead P2, the second negative electrode lead N2 may be connected to the third positive electrode lead P3, the third negative electrode lead N3 may be connected to the fourth positive electrode lead P4, the fourth negative electrode lead N4 may be connected to the fifth positive electrode lead P5, the fifth negative electrode lead N5 may be connected to the sixth positive electrode lead P6, the sixth negative electrode lead N6 may be connected to the seventh positive electrode lead P7, the seventh negative electrode lead N7 may be connected to the eighth positive electrode lead P8, and the eighth negative electrode lead N8 may be connected to the ninth positive electrode lead P9. The ninth negative electrode lead N9 may be connected to the tenth positive electrode lead P10, the tenth negative electrode lead N10 may be connected to the eleventh positive electrode lead P11, the eleventh negative electrode lead N11 may be connected to the twelfth positive electrode lead P12, the twelfth negative electrode lead N12 may be connected to the thirteenth positive electrode lead P13, the thirteenth negative electrode lead N13 may be connected to the fourteenth positive electrode lead P14, the fourteenth negative electrode lead N14 may be connected to the fifteenth positive electrode lead P15, and the fifteenth negative electrode lead N15 may be connected to the sixteenth positive electrode lead P16. The above-mentioned connection means a physical connection, including being configured to be electrically connected, and means including an indirect connection including an additional element in between.

[0041] The first positive lead P1 may be welded to the first bus bar 123, the first negative lead N1 may be welded to the second positive lead P2, the second negative lead N2 may be welded to the third positive lead P3, the third negative lead N3 may be welded to the fourth positive lead P4, the fourth negative lead N4 may be welded to the fifth positive lead P5, the fifth negative lead N5 may be welded to the sixth positive lead P6, the sixth negative lead N6 may be welded to the seventh positive lead P7, the seventh negative lead N7 may be welded to the eighth positive lead P8, and the eighth negative lead N8 may be welded to the ninth positive lead P9. The ninth negative lead N9 may be welded to the tenth positive lead P10, the tenth negative lead N10 may be welded to the eleventh positive lead P11, the eleventh negative lead N11 may be welded to the twelfth positive lead P12, the twelfth negative lead N12 may be welded to the thirteenth positive lead P13, the thirteenth negative lead N13 may be welded to the fourteenth positive lead P14, the fourteenth negative lead N14 may be welded to the fifteenth positive lead P15, and the fifteenth negative lead N15 may be welded to the sixteenth positive lead P16.

[0042] The separator 112 may be interposed between the plurality of pouch-type battery cells 111. The separator 112 may prevent swelling of the plurality of pouch-type battery cells 111 by applying lateral pressure to the plurality of pouch-type battery cells 111. According to an exemplary embodiment, the separator 112 may include polyurethane. According to another exemplary embodiment, the separator 112 may also include a flame-retardant material such as silicone.

[0043] The first busbar assembly 120 and the second busbar assembly 130 may be coupled to the cell stack 110. The first busbar assembly 120 and the second busbar assembly 130 may be spaced apart from each other with the cell stack 110 therebetween.

[0044] The first busbar assembly 120 may include a first busbar frame 121, a first busbar 123, a second busbar 124, a first integrated circuit 125, a plurality of first contact pads 127, and a plurality of first wires 129. The first busbar frame 121 may include an insulating material such as plastic. The first busbar frame 121 may be coupled to the cell stack 110 at a front side of the cell stack 110. The first busbar frame 121 may support and secure the first busbar 123, the second busbar 124, and the first integrated circuit 125. The first busbar frame 121 may include a plurality of ribs and empty spaces between the ribs, which may reduce the weight of the first busbar frame 121.

[0045] The first busbar 123 and the second busbar 124 may be coupled to the first busbar frame 121. The first busbar 123 and the second busbar 124 may be output terminals for outputting the voltage of the cell stack 110. The first busbar 123 may be a positive terminal, and the second busbar 124 may be a negative terminal. The first busbar 123 may be coupled to the first positive lead P1. The second busbar 124 may be coupled to the sixteenth negative lead N16. Thereby, the potential difference between the first busbar 123 and the second busbar 124 may be substantially the same as the output voltage of the cell stack 110 (i.e., the sum of the output voltages of the first to sixteenth battery banks BNK1 to BNK16).

[0046] The first integrated circuit 125 may be coupled to the first bus bar frame 121. The first integrated circuit 125 may be configured to measure a voltage of a predetermined node of the cell stack 110. The first integrated circuit 125 may be configured to transmit a measurement value of each voltage of the predetermined node of the cell stack 110 to a Battery Management System (BMS).

[0047] Nodes sensed by the first integrated circuit 125 include a node of the first positive lead P1, a node of the second negative lead N2 and the third positive lead P3, a node of the fourth negative lead N4 and the fifth positive lead P5, a node of the sixth negative lead N6 and the seventh positive lead P7, a node of the eighth negative lead N8 and the ninth positive lead P9, a node of the tenth negative lead N10 and the eleventh positive lead P11, a node of the twelfth negative lead N12 and the thirteenth positive lead P13, a node of the fourteenth negative lead N14 and the fifteenth positive lead P15, and a node of the sixteenth negative lead N16.

[0048] The first integrated circuit 125 may be coupled to the above-mentioned nodes via a plurality of first wires 129. The plurality of first wires 129 may be configured to be electrically coupled to the first integrated circuit 125. Each of the plurality of first wires 129 may be configured to be electrically coupled to a corresponding one of the first positive lead P1, the second negative lead N2, the third positive lead P3, the fourth negative lead N4, the fifth positive lead P5, the sixth negative lead N6, the seventh positive lead P7, the eighth negative lead N8, the ninth positive lead P9, the tenth negative lead N10, the eleventh positive lead P11, the twelfth negative lead N12, the thirteenth positive lead P13, the fourteenth negative lead N14, the fifteenth positive lead P15, and the sixteenth negative lead N16.

[0049] Each of the multiple first wires 129 may be configured to electrically couple any one of the positive electrode leads P1 to P16 of each of the multiple battery cells 111 and the negative electrode leads N1 to N16 of each of the multiple battery cells 111 to the first integrated circuit 125. More specifically, each of the multiple first wires 129 may be in contact with a corresponding one of the first positive electrode lead P1, the third positive electrode lead P3, the fifth positive electrode lead P5, the seventh positive electrode lead P7, the ninth positive electrode lead P9, the eleventh positive electrode lead P11, the thirteenth positive electrode lead P13, and the fifteenth positive electrode lead P15.

[0050] Each of the plurality of first wires 129 may be configured to be electrically coupled to a corresponding one of the plurality of first contact pads 127. Each of the plurality of first contact pads 127 may be disposed on the first integrated circuit 125. Each of the plurality of first contact pads 127 may be coupled to a circuit pattern of the first integrated circuit 125. Each of the plurality of first wires 129 may be in contact with a corresponding one of the plurality of first contact pads 127. Each of the plurality of first contact pads 127 may include, for example, nickel. Each of the plurality of first contact pads 127 may prevent damage to the first integrated circuit 125 when the plurality of first wires 129 is formed.

[0051] 5, each of the plurality of first contact pads 127 is connected to two first wires 129, but is not limited thereto. Each of the plurality of first contact pads 127 may be connected to a single first wire 129, or may be connected to three or more first wires 129.

[0052] The first insulating cover 150 may be coupled to the first bus bar frame 121. The first insulating cover 150 may cover the first positive lead P1, the second negative lead N2, the third positive lead P3, the fourth negative lead N4, the fifth positive lead P5, the sixth negative lead N6, the seventh positive lead P7, the eighth negative lead N8, the ninth positive lead P9, the tenth negative lead N10, the eleventh positive lead P11, the twelfth negative lead N12, the thirteenth positive lead P13, the fourteenth negative lead N14, the fifteenth positive lead P15, and the sixteenth negative lead N16, thereby preventing unintentional short circuits between them and external elements. The first insulating cover 150 may include an insulating material.

[0053] The second busbar assembly 130 may include a second busbar frame 131, a second integrated circuit 135, a plurality of second contact pads 137, and a plurality of second wires 139. The second busbar frame 131 may include an insulating material such as plastic. The second busbar frame 131 may be coupled to the cell stack 110 at a rear surface of the cell stack 110. The second busbar frame 131 may support and fix the second integrated circuit 135. The second busbar frame 131 may include a plurality of ribs and empty spaces between the ribs, which may reduce the weight of the second busbar frame 131.

[0054] The second integrated circuit 135 may be coupled to the second bus bar frame 131. The second integrated circuit 135 may be configured to measure a voltage at a predetermined node of the cell stack 110. The measurement of each voltage at the predetermined node of the cell stack 110 by the second integrated circuit 135 may be communicated to the first integrated circuit 125 by the FFC assembly 140.

[0055] Nodes sensed by the second integrated circuit 135 include a node of the first negative lead N1 and the second positive lead P2, a node of the third negative lead N3 and the fourth positive lead P4, a node of the fifth negative lead N5 and the sixth positive lead P6, a node of the seventh negative lead N7 and the eighth positive lead P8, a node of the ninth negative lead N9 and the tenth positive lead P10, a node of the eleventh negative lead N11 and the twelfth positive lead P12, a node of the thirteenth negative lead N13 and the fourteenth positive lead P14, and a node of the fifteenth negative lead N15 and the sixteenth positive lead P16.

[0056] The second integrated circuit 135 may be coupled to the above-mentioned nodes via a plurality of second wires 139. The plurality of second wires 139 may be configured to be electrically coupled to the second integrated circuit 135. Each of the plurality of second wires 139 may be configured to be electrically coupled to a corresponding one of the first negative lead N1, the second positive lead P2, the third negative lead N3, the fourth positive lead P4, the fifth negative lead N5, the sixth positive lead P6, the seventh negative lead N7, the eighth positive lead P8, the ninth negative lead N9, the tenth positive lead P10, the eleventh negative lead N11, the twelfth positive lead P12, the thirteenth negative lead N13, the fourteenth positive lead P14, the fifteenth negative lead N15, and the sixteenth positive lead P16.

[0057] Each of the multiple second wires 139 may be configured to electrically couple any one of the positive electrode leads P1 to P16 of each of the multiple battery cells 111 and the negative electrode leads N1 to N16 of each of the multiple battery cells 111 to the second integrated circuit 135. Each of the multiple second wires 139 may be in contact with a corresponding one of the second positive electrode lead P2, the fourth positive electrode lead P4, the sixth positive electrode lead P6, the eighth positive electrode lead P8, the tenth positive electrode lead P10, the twelfth positive electrode lead P12, and the fourteenth positive electrode lead P14.

[0058] Each of the plurality of second wires 139 may be configured to be electrically coupled to a corresponding one of the plurality of second contact pads 137 coupled to the circuit pattern of the second integrated circuit 135. Each of the plurality of second wires 139 may be in contact with a corresponding one of the plurality of second contact pads 137. Each of the plurality of second contact pads 137 may include, for example, nickel. Each of the plurality of second contact pads 137 may prevent damage to the second integrated circuit 135 when the plurality of second wires 139 is formed.

[0059] The second insulating cover 160 may be coupled to the second bus bar frame 131. The second insulating cover 160 may cover the first negative electrode lead N1, the second positive electrode lead P2, the third negative electrode lead N3, the fourth positive electrode lead P4, the fifth negative electrode lead N5, the sixth positive electrode lead P6, the seventh negative electrode lead N7, the eighth positive electrode lead P8, the ninth negative electrode lead N9, the tenth positive electrode lead P10, the eleventh negative electrode lead N11, the twelfth positive electrode lead P12, the thirteenth negative electrode lead N13, the fourteenth positive electrode lead P14, the fifteenth negative electrode lead N15, and the sixteenth positive electrode lead P16, thereby preventing unintentional short circuits between them and external elements. The second insulating cover 160 may include an insulating material.

[0060] The first busbar assembly 120 and the second busbar assembly 130 may be coupled by an FFC assembly 140. The FFC assembly 140 may be disposed on the cell stack 110. The FFC assembly 140 may be a path for transmitting a measurement value of each voltage of a predetermined node of the cell stack 110 sensed by the second busbar assembly 130. The FFC assembly 140 may be coupled to the first integrated circuit 125 and the second integrated circuit 135 via the first receiving portion 125CR of the first integrated circuit 125 and the second receiving portion 135CR of the second integrated circuit 135.

[0061] The battery assembly 100 may be implemented in a battery pack, which may include a BMS. The BMS may be configured to monitor and balance the battery assembly 100 based on the measured voltages of the respective predetermined nodes of the cell stack 110 measured by the first integrated circuit 125 and the second integrated circuit 135. Balancing the battery assembly 100 is an operation to reduce deviations between the multiple battery banks BNK1 to BNK16.

[0062] Second embodiment FIG. 7 shows a portion corresponding to FIG.

[0063] 7, unlike FIG. 5, the first contact pads 127 (see FIG. 5) may be omitted. In this case, each of the first wires 129 may directly contact the first integrated circuit 125. According to an exemplary embodiment, since the first contact pads 127 (see FIG. 5) are omitted, the energy density of the battery assembly 100 (see FIG. 1) may be further improved.

[0064] The present invention has been described in more detail above through the drawings and embodiments, etc. However, the configurations described in the drawings or embodiments in this specification are merely one embodiment of the present invention and do not fully represent the technical ideas of the present invention, and therefore there may be various equivalents and modifications that can replace them at the time of filing this application. [Explanation of symbols]

[0065] 100 Battery Assembly 110 First cell stack 111 Pouch type battery cell 112 Separator 120 First busbar assembly 121 First bus bar frame 123 No. 1 bus bar 124 2nd bus bar 125 1st Integrated Circuit 127 1st Contact Pad 129 First Wire 130 Second busbar assembly 131 Second bus bar frame 135 2nd Integrated Circuit 137 Second Contact Pad 139 Second Wire 140 FFC Assembly (Flat Flexible Cable) 150 First insulating cover 160 Second insulating cover

Claims

1. 1. A battery assembly comprising: a cell stack including a first pouch-type battery cell, a second pouch-type battery cell, and a third pouch-type battery cell, the first pouch-type battery cell including a first positive lead and a first negative lead, the second pouch-type battery cell including a second positive lead and a second negative lead, and the third pouch-type battery cell including a third positive lead and a third negative lead; and a first bus bar assembly coupled to the cell stack; and The first bus bar assembly includes: A first bus bar frame; A first bus bar coupled to the first positive lead and configured to output a voltage of the cell stack; a first integrated circuit coupled to the first bus bar frame and configured to measure an electrical potential of the second negative lead and the third positive lead; a first wire configured to be electrically coupled to the first integrated circuit and to the third positive lead; a battery assembly including:

2. 2. The battery assembly of claim 1, further comprising a first contact pad disposed on the first integrated circuit and in contact with the first wire.

3. The battery assembly of claim 2 , wherein the first contact pad comprises nickel.

4. The battery assembly of claim 1 , wherein the first integrated circuit contacts the first wire.

5. The battery assembly according to claim 1 , wherein the first wire contacts the third positive lead.

6. the first positive lead, the second negative lead, and the third positive lead are disposed on a front surface of the cell stack; and The battery assembly of claim 1 , wherein the first bus bar frame covers the front surface of the cell stack.

7. a second bus bar assembly coupled to the cell stack; and The second bus bar assembly includes: A second bus bar frame; a second integrated circuit coupled to the second bus bar frame and configured to measure an electrical potential of the first negative lead and the second positive lead; 7. The battery assembly of claim 1, further comprising: a second wire configured to be electrically coupled to the second integrated circuit and to the second positive lead.

8. 8. The battery assembly of claim 7, further comprising a second contact pad disposed on the second integrated circuit and in contact with the second wire.

9. The battery assembly of claim 7 , wherein the second integrated circuit contacts the second wire.

10. The battery assembly according to claim 7 , wherein the second wire contacts the second positive lead.

11. the first negative electrode lead, the second positive electrode lead, and the third negative electrode lead are disposed on a rear surface of the cell stack; and The battery assembly of claim 7 , wherein the second bus bar frame covers the rear surface of the cell stack.

12. A battery assembly comprising: a cell stack including a plurality of pouch-type battery cells, each of the plurality of pouch-type battery cells including a positive electrode lead and a negative electrode lead; and a first bus bar assembly coupled to the cell stack; and The first bus bar assembly includes: A first bus bar frame; a first integrated circuit coupled to the first bus bar frame and configured to measure a potential of one of the positive electrode lead and the negative electrode lead of each of the plurality of pouch-type battery cells; a plurality of first wires configured to electrically connect one of the positive electrode lead and the negative electrode lead of each of the plurality of pouch-type battery cells to the first integrated circuit.

13. 13. The battery assembly of claim 12, further comprising a plurality of first contact pads disposed on the first integrated circuit and in contact with the plurality of first wires.

14. The battery assembly of claim 12 , wherein the first integrated circuit contacts the first plurality of wires.

15. The battery assembly according to any one of claims 12 to 14, wherein the plurality of first wires contact the positive electrode leads of each of the plurality of pouch-type battery cells.

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