Battery cell assembly

Abstract

According to exemplary embodiments, a battery cell assembly is provided. The battery cell assembly includes: a cell stack; first and second bus bar frames coupled to the cell stack; a first integrated circuit mounted on the first bus bar frame; a second integrated circuit mounted on the second bus bar frame; and a lead cover assembly coupled to the first bus bar frame, wherein the lead cover assembly comprises: a lead cover frame coupled to the first bus bar frame; and a third integrated circuit mounted on the lead cover frame.

Description

Battery cell assembly

[0001] The present invention relates to a battery cell assembly. This application claims the benefit of Korean Application No. 10-2023-0076999, filed June 15, 2023, which is incorporated herein by reference in its entirety.

[0002] Unlike primary batteries, secondary batteries can be charged and discharged multiple times. They are widely used as a power source for various wireless devices, including handsets, laptops, and cordless vacuum cleaners. Recently, improved energy density and economies of scale have dramatically reduced the per-unit manufacturing cost of secondary batteries. Furthermore, as the range of battery electric vehicles (BEVs) has increased to match that of fuel-powered vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility.

[0003] To meet the rapidly growing demand for secondary batteries for mobility, cell manufacturers are undertaking massive capital expenditures. Each company is increasing per-line productivity to maximize return on invested capital, and various initiatives are underway to improve yield and productivity.

[0004] The technical idea of ​​the present invention aims to solve a problem by providing a battery cell assembly with improved productivity.

[0005] According to exemplary embodiments of the present invention for solving the above-described problem, a battery cell assembly is provided. The battery cell assembly comprises a cell stack including a plurality of first pouch-type battery cells and a plurality of second pouch-type battery cells, each of the plurality of first pouch-type battery cells including a first positive electrode lead and a first negative electrode lead, and each of the plurality of second pouch-type battery cells including a second positive electrode lead and a second negative electrode lead; a first bus bar frame coupled to the cell stack; a first integrated circuit mounted on the first bus bar frame; a second bus bar frame coupled to the cell stack; a second integrated circuit mounted on the second bus bar frame; and a lead cover assembly coupled to the first bus bar frame, wherein the lead cover assembly includes a lead cover frame coupled to the first bus bar frame; and a third integrated circuit mounted on the lead cover frame.

[0006] The first integrated circuit is configured to sense a potential of the first positive electrode lead of each of the plurality of first pouch-type battery cells and the second negative electrode lead of each of the plurality of second pouch-type battery cells.

[0007] The first integrated circuit includes a plurality of first sensing plates short-circuited to the first positive electrode lead of each of the plurality of first pouch-type battery cells and to the second negative electrode lead of each of the plurality of second pouch-type battery cells.

[0008] The second integrated circuit is configured to sense a potential of the first negative lead of each of the plurality of first pouch-type battery cells and the second positive lead of each of the plurality of second pouch-type battery cells.

[0009] The second integrated circuit includes a plurality of second sensing plates short-circuited to the first negative lead of each of the plurality of first pouch-type battery cells and to the second positive lead of each of the plurality of second pouch-type battery cells.

[0010] The third integrated circuit includes a CMC (Cell Management Controller).

[0011] The above lead cover assembly includes an integrated circuit cover coupled to a lead cover frame coupled to the first bus bar frame and covering the third integrated circuit.

[0012] The battery cell assembly further includes a first connection cable connected to each of the first integrated circuit and the third integrated circuit.

[0013] The lead cover frame includes a first slit, and the first connection cable is connected to the third integrated circuit through the first slit.

[0014] The battery cell assembly further includes a second connection cable connected to each of the second integrated circuit and the third integrated circuit.

[0015] The lead cover frame includes a second slit, and the second connection cable is connected to the third integrated circuit through the second slit.

[0016] The battery cell assembly further includes a first connection cable connected to each of the first integrated circuit and the second integrated circuit.

[0017] The battery cell assembly further includes a second connection cable connected to each of the first integrated circuit and the third integrated circuit.

[0018] According to exemplary embodiments of the present invention, the CMC (Cell Management Controller) of a battery cell assembly can be mounted on a lead cover frame. Accordingly, damage to the CMC can be prevented during electrode lead welding, and the yield and productivity of the battery cell assembly can be improved.

[0019] The 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 those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0020] FIG. 1 is a perspective view illustrating a battery cell assembly according to exemplary embodiments.

[0021] Figure 2 is an exploded perspective view of a battery cell assembly.

[0022] Figure 3 is an enlarged partial perspective view of a portion of Figure 2.

[0023] Figure 4 is an exploded perspective view of a battery cell assembly.

[0024] Figure 5 is an enlarged partial perspective view of a portion of Figure 5.

[0025] Figure 6 is an exploded perspective view of the lead cover assembly.

[0026] Figure 7 is a plan view of a cell stack.

[0027] FIG. 8 is a perspective view illustrating a battery cell assembly according to exemplary embodiments.

[0028] Figure 9 is an exploded perspective view of a battery cell assembly.

[0029] Fig. 10 is an enlarged partial perspective view of a portion of Fig. 9.

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0031] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0032] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0033] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer explanation. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes or proportions.

[0034]

[0035] (Example 1)

[0036] FIG. 1 is a perspective view illustrating a battery cell assembly (120) according to exemplary embodiments.

[0037] Figure 2 is an exploded perspective view of a battery cell assembly (120).

[0038] Figure 3 is an enlarged partial perspective view of a portion of Figure 2.

[0039] Figure 4 is an exploded perspective view of a battery cell assembly (120).

[0040] Figure 5 is an enlarged partial perspective view of a portion of Figure 4.

[0041] Figure 6 is an exploded perspective view of the lead cover assembly.

[0042] Figure 7 is a plan view of a cell stack.

[0043] Referring to FIGS. 1 to 7, a battery cell assembly (120) may include a cell stack (CS), first and second bus bars (123P, 123N), a first bus bar frame (124F), a second bus bar frame (124R), a first integrated circuit (125F), a second integrated circuit (125R), a first connection cable (126F), a second connection cable (126R), a lead cover assembly (127F), and a lead cover (128).

[0044] According to exemplary embodiments, a cell stack (CS) may include a plurality of pouch-type battery cells (121_1, 121_2, 121_3, 121_4, 121_5, 121_6, 121_7, 121_8, 121_9, 121_10, 121_11, 121_12, 121_13, 121_14, 121_15, 121_16, 121_17, 121_18, 121_19, 121_20, hereinafter 121_1 to 121_20) and a plurality of separators (122).

[0045] Each of the plurality of pouch-type battery cells (121_1 to 121_20) may include a positive electrode lead (121P), a negative electrode lead (121N), an electrode assembly, and a pouch case. The pouch case may cover the electrode assembly. The electrode assembly may be housed within the pouch case. The electrode assembly may include a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode.

[0046] The electrode assembly may be either a jelly-roll type or a stack type depending on the assembly form. A jelly-roll type electrode assembly may include a winding structure of a positive electrode, a negative electrode, and a separator interposed therebetween. A stack type electrode assembly may include a plurality of sequentially stacked positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed therebetween.

[0047] The positive electrode lead (121P) may be connected to the positive electrodes of the electrode assembly. The negative electrode lead (121N) may be connected to the negative electrodes of the electrode assembly. The positive electrode lead (121P) and the negative electrode lead (121N) may protrude outwardly from the pouch case. Each of the plurality of pouch-type battery cells (121_1 to 121_20) may be a bidirectional cell. The positive electrode lead (121P) and the negative electrode lead (121N) may protrude in opposite directions from the pouch case of each of the plurality of pouch-type battery cells (121_1 to 121_20).

[0048] The pouch case may include a storage compartment and a terrace. The storage compartment may provide a storage space for storing the electrode assembly. The storage space may be provided by a forming process. The storage compartment may have a convex shape relative to the terrace. The terrace may include a sealed portion. The terrace may surround the storage compartment.

[0049] According to exemplary embodiments, a plurality of pouch-type battery cells (121_1 to 121_20) may be stacked in one direction. The stacking direction of the plurality of pouch-type battery cells (121_1 to 121_20) may be substantially perpendicular to the separation direction of the positive lead (121P) and the negative lead (121N).

[0050] According to exemplary embodiments, each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) may be referred to as a first pouch-type battery cell. The pouch case, positive lead (121P), and negative lead (121N) of each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) may be referred to as a first pouch case, a first positive lead, and a first negative lead, respectively.

[0051] Each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) may be referred to as a second pouch-type battery cell. The pouch case, positive lead (121P), and negative lead (121N) of each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) may be referred to as a second pouch case, a second positive lead, and a second negative lead, respectively.

[0052] The negative leads (121N) of each of the plurality of pouch-type battery cells (121_1 to 121_20) can be short-circuited with the positive leads (121P) of the subsequent one of the plurality of pouch-type battery cells (121_1 to 121_20).

[0053] According to exemplary embodiments, the negative lead (121N) of the pouch type battery cell (121_1) may be coupled to the positive lead (121P) of the pouch type battery cell (121_2). According to exemplary embodiments, the negative lead (121N) of the pouch type battery cell (121_1) may be welded to the positive lead (121P) of the pouch type battery cell (121_2). According to exemplary embodiments, the negative lead (121N) of the pouch type battery cell (121_1) may be short-circuited to the positive lead (121P) of the pouch type battery cell (121_2).

[0054] According to exemplary embodiments, the negative lead (121N) of the pouch type battery cell (121_2) may be joined to the positive lead (121P) of the pouch type battery cell (121_3). According to exemplary embodiments, the negative lead (121N) of the pouch type battery cell (121_2) may be welded to the positive lead (121P) of the pouch type battery cell (121_3). According to exemplary embodiments, the negative lead (121N) of the pouch type battery cell (121_2) may be short-circuited to the positive lead (121P) of the pouch type battery cell (121_3).

[0055] According to exemplary embodiments, the negative lead (121N) of the pouch type battery cell (121_3) may be joined to the positive lead (121P) of the pouch type battery cell (121_4). According to exemplary embodiments, the negative lead (121N) of the pouch type battery cell (121_3) may be welded to the positive lead (121P) of the pouch type battery cell (121_4). According to exemplary embodiments, the negative lead (121N) of the pouch type battery cell (121_3) may be short-circuited to the positive lead (121P) of the pouch type battery cell (121_4).

[0056] The connection relationship between the positive lead (121p) and the negative lead (121N) of each of the pouch-type battery cells (121_4, 121_5, 121_6, 121_7, 121_8, 121_9, 121_10, 121_11, 121_12, 121_13, 121_14, 121_15, 121_16, 121_17, 121_18, 121_19, 121_20) is substantially the same as that described for the pouch-type battery cells (121_1, 121_2, 121_3, 121_4), so a duplicate description thereof is omitted.

[0057] The plurality of separators (122) can prevent swelling of the plurality of pouch-type battery cells (121_1 to 121_20) by horizontally supporting the plurality of pouch-type battery cells (121_1 to 121_20). According to exemplary embodiments, the plurality of separators (122) may be thermal barriers. According to exemplary embodiments, each of the plurality of separators (122) may have a high melting temperature and low thermal conductivity. According to exemplary embodiments, each of the plurality of separators (122) may include a flame retardant material, such as ceramic and coated glass fiber. According to exemplary embodiments, each of the plurality of separators (122) may be configured to release a fire retardant material and a fire extinguishing agent when a thermal runaway event occurs.

[0058] Each of the first and second bus bar frames (124F, 124R) may be coupled to a cell stack (CS). The first bus bar frame (124F) may support a positive lead (121P) of each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and a negative lead (121N) of each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20). The second bus bar frame (124R) can support the negative leads (121N) of each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the positive leads (121P) of each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20).

[0059] The first bus bar frame (124F) can further support the first and second bus bars (123P, 123N). The first bus bar (123P) can be coupled to the positive lead (121P) of the pouch-type battery cell (121_1). The first bus bar (123P) can be welded to the positive lead (121P) of the pouch-type battery cell (121_1). The second bus bar (123N) can be coupled to the negative lead (121N) of the pouch-type battery cell (121_20). The second bus bar (123N) can be welded to the negative lead (121N) of the pouch-type battery cell (121_20). Accordingly, the voltage of the cell stack (CS) can be output through the first and second bus bars (123P, 123N).

[0060] The first integrated circuit (125F) may be mounted on a first bus bar frame (124F). The first bus bar frame (124F) may include a first groove for accommodating the first integrated circuit (125F). As a non-limiting example, the first integrated circuit (125F) may be implemented based on a flexible printed circuit board. The first integrated circuit (125F) may include a plurality of first sensing plates (125FC) for detecting the potential of the positive lead (121P) of each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the negative lead (121N) of each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20). Each of the plurality of first sensing plates (125FC) can be short-circuited with the positive lead (121P) of a corresponding one of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the negative lead (121N) of a corresponding one of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20).

[0061] Each of the plurality of first sensing plates (125FC) can be welded to a positive lead (121P) of a corresponding one of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and a negative lead (121N) of a corresponding one of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) by a method such as ultrasonic welding. Accordingly, the voltage values ​​of the positive leads (121P) of each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the negative leads (121N) of each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) can be output through the first integrated circuit (125F).

[0062] In FIG. 3, each of the plurality of first sensing plates (125FC) is illustrated as being interposed between the positive lead (121P) of a corresponding one of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the negative lead (121N) of a corresponding one of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) and the first bus bar frame (124F), but is not limited thereto.

[0063] Each of the plurality of first sensing plates (125FC) may be spaced apart from the first bus bar frame (124F) with the positive lead (121P) of the corresponding one of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the negative lead (121N) of the corresponding one of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) interposed therebetween.

[0064] The second integrated circuit (125R) may be mounted on a second bus bar frame (124R). The second bus bar frame (124R) may include a second groove for accommodating the second integrated circuit (125R). As a non-limiting example, the second integrated circuit (125R) may be implemented based on a flexible printed circuit board. The second integrated circuit (125R) may include a plurality of second sensing plates (125RC) for detecting the potential of the negative lead (121N) of each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the positive lead (121P) of each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20). Each of the plurality of second sensing plates (125RC) can be short-circuited with the negative lead (121N) of a corresponding one of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the positive lead (121P) of a corresponding one of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20).

[0065] Each of the plurality of second sensing plates (125RC) may be welded to a negative lead (121N) of a corresponding one of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and a positive lead (121P) of a corresponding one of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) by a method such as ultrasonic welding. Accordingly, the voltage values ​​of the negative leads (121N) of each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the positive leads (121P) of each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) can be output through the second integrated circuit (125R).

[0066] In FIG. 3, each of the plurality of second sensing plates (125RC) is illustrated as being interposed between the negative lead (121N) of a corresponding one of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the positive lead (121P) of a corresponding one of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) and the second bus bar frame (124R), but is not limited thereto.

[0067] Each of the plurality of second sensing plates (125RC) may be spaced apart from the second bus bar frame (124R) with the negative lead (121N) of the corresponding one of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the positive lead (121P) of the corresponding one of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20) interposed therebetween.

[0068] The lead cover assembly (127F) may include a lead cover frame (127FF), a third integrated circuit (127FIC), and an integrated circuit cover (127FC). The lead cover frame (127FF) may be coupled to the first bus bar frame (124F). The lead cover frame (127FF) may be fixed to the first bus bar frame (124F) by, for example, heat-welding or a force-fit method. The lead cover frame (127FF) can cover the positive lead (121P) of each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the negative lead (121N) of each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20).

[0069] The third integrated circuit (127FIC) may be mounted on the lead cover frame (127FF). The lead cover frame (127FF) may include a third groove for accommodating the third integrated circuit (127FIC). The third integrated circuit (127FIC) may be fixed to the lead cover frame (127FF) by, for example, a method such as thermal bonding.

[0070] An integrated circuit cover (127FC) may be coupled to a lead cover frame (127FF). The integrated circuit cover (127FC) may cover a third integrated circuit (127FIC). The integrated circuit cover (127FC) and the lead cover frame (127FF) may be configured to protect the third integrated circuit (127FIC). The integrated circuit cover (127FC) and the lead cover frame (127FF) may include an insulating material.

[0071] According to exemplary embodiments, since the third integrated circuit (127FIC) is mounted on the lead cover assembly (127F), the third integrated circuit (127FIC) can be prevented from being damaged during welding of the positive lead (127P), the negative lead (127N), the first sensing plates (125FC) and the first sensing plates (125RC) of each of the plurality of battery cells (121_1 to 121_20). Furthermore, even if the third integrated circuit (127FIC) is defective, only one of the third integrated circuit (127FIC) or the lead cover assembly (127F) can be replaced, thereby preventing scrapping of the entire battery cell assembly (120). Accordingly, the productivity and yield of the secondary battery can be improved.

[0072] According to exemplary embodiments, the third integrated circuit (127FIC) may include a Cell Management Controller (CMC). The third integrated circuit (127FIC) may be configured to monitor and balance a plurality of pouch-type battery cells (121_1 to 121_20).

[0073] Monitoring of multiple pouch-type battery cells (121_1 to 121_20) may include measuring voltages and currents of specific nodes within the cells and measuring temperatures of set locations within the cell stack (CS). The third integrated circuit (127FIC) may include a temperature sensor or be electrically connected to a temperature sensor positioned adjacent to the cell stack (CS).

[0074] Balancing of a plurality of pouch-type battery cells (121_1 to 121_20) is an operation to reduce a deviation between the plurality of pouch-type battery cells (121_1 to 121_20). By monitoring and balancing the plurality of pouch-type battery cells (121_1 to 121_20), the cell stack (CS) can operate under optimal conditions, and thus, shortening of the lifespan of each of the plurality of pouch-type battery cells (121_1 to 121_20) can be prevented.

[0075] The lead cover (127R) can be coupled to the second bus bar frame (124R). The lead cover (127R) can be fixed to the second bus bar frame (124R) by, for example, heat-welding or force-fitting. The lead cover (127R) may cover the negative lead (121N) of each of the odd-numbered pouch-type battery cells (121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, 121_19) and the positive lead (121P) of each of the even-numbered pouch-type battery cells (121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, 121_20). The lead cover (127R) may include an insulating material.

[0076] A first connection cable (126F) can connect a first integrated circuit (125F) and a third integrated circuit (127FIC). The first connection cable (126F) can be connected to each of the first integrated circuit (125F) and the third integrated circuit (127FIC). The first connection cable (126F) can be directly connected to each of the first integrated circuit (125F) and the third integrated circuit (127FIC). The first connection cable (126F) can be connected to the third integrated circuit (127FIC) through a first slit (127S1) of a lead cover frame (127FF). Voltage values ​​detected by the first integrated circuit (125F) can be transmitted to the third integrated circuit (127FIC) through the first connection cable (126F).

[0077] The second connection cable (126R) can connect the second integrated circuit (125R) and the third integrated circuit (127FIC). The second connection cable (126R) can be connected to each of the second integrated circuit (125R) and the third integrated circuit (127FIC). The second connection cable (126R) can be directly connected to each of the second integrated circuit (125R) and the third integrated circuit (127FIC). The second connection cable (126R) can be connected to the third integrated circuit (127FIC) through the second slit (127S2) of the lead cover frame (127FF). Voltage values ​​detected by the second integrated circuit (125R) can be transmitted to the third integrated circuit (127FIC) through the second connection cable (126R).

[0078]

[0079] (Example 2)

[0080] FIG. 8 is a perspective view illustrating a battery cell assembly according to exemplary embodiments.

[0081] Figure 9 is an exploded perspective view of a battery cell assembly.

[0082] Fig. 10 is an enlarged partial perspective view of a portion of Fig. 9.

[0083] Referring to FIGS. 8 to 10, a battery cell assembly (120') may include a cell stack (CS), first and second bus bars (123P, 123N), a first bus bar frame (124F), a second bus bar frame (124R), a first integrated circuit (125F), a second integrated circuit (125R), a first connection cable (126F), a second connection cable (126R), a lead cover assembly (127F'), and a lead cover (128).

[0084] The cell stack (CS), the first and second bus bars (123P, 123N), the first bus bar frame (124F), the second bus bar frame (124R), the first integrated circuit (125F), the second integrated circuit (125R), the first connection cable (126F), the second connection cable (126R), and the lead cover (128) are substantially the same as those described with reference to FIGS. 1 to 7, and therefore, redundant descriptions thereof are omitted.

[0085] According to exemplary embodiments, the second connection cable (126R) may connect the second integrated circuit (125R) and the first integrated circuit (125F). The second connection cable (126R) may be connected to each of the second integrated circuit (125R) and the first integrated circuit (125F). The second connection cable (126R) may be directly connected to each of the second integrated circuit (125R) and the first integrated circuit (125F). The second connection cable (126R) may be connected to the first integrated circuit (125F) through the second slit (127S2) of the lead cover frame (127FF). Voltage values ​​detected by the second integrated circuit (125R) may be transmitted to the first integrated circuit (125F) through the second connection cable (126R).

[0086] The lead cover assembly (127F') may include a lead cover frame (127FF'), a third integrated circuit (127FIC'), and an integrated circuit cover (127FC'). The lead cover frame (127FF') and the integrated circuit cover (127FC') are substantially identical to the lead cover frame (127FF, see FIG. 3) and the integrated circuit cover (127FC, see FIG. 3), except that the lead cover frame (127FF') and the integrated circuit cover (127FC') include a first slit (127S1) but do not include a second slit (127S2, see FIG. 3) (i.e., include only the first slit (127S1)).

[0087] The first connection cable (126F) can connect the first integrated circuit (125F) and the third integrated circuit (127FIC'). The first connection cable (126F) can be connected to each of the first integrated circuit (125F) and the third integrated circuit (127FIC'). The first connection cable (126F) can be directly connected to each of the first integrated circuit (125F) and the third integrated circuit (127FIC'). The first connection cable (126F) can be connected to the third integrated circuit (127FIC') through the first slit (127S1) of the lead cover frame (127FF). The voltage values ​​detected by the first integrated circuit (125F) and the voltage values ​​detected by the second integrated circuit (125R) can be transmitted to the third integrated circuit (127FIC') through the first connection cable (126F).

[0088] According to exemplary embodiments, the third integrated circuit (127FIC') may include a CMC and may be configured to monitor and balance a plurality of pouch-type battery cells (121_1 to 121_20).

[0089] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

Claims

1. A cell stack comprising a plurality of first pouch-type battery cells and a plurality of second pouch-type battery cells, each of the plurality of first pouch-type battery cells including a first positive electrode lead and a first negative electrode lead, and each of the plurality of second pouch-type battery cells including a second positive electrode lead and a second negative electrode lead; A first bus bar frame coupled to the cell stack; A first integrated circuit mounted on the first bus bar frame; A second bus bar frame coupled to the cell stack; a second integrated circuit mounted on the second bus bar frame; and Including a lead cover assembly coupled to the first bus bar frame, The above lead cover assembly, A lead cover frame coupled to the first bus bar frame; and A battery cell assembly characterized by including a third integrated circuit mounted on the lead cover frame.

2. In paragraph 1, A battery cell assembly, wherein the first integrated circuit is configured to sense a potential of the first positive electrode lead of each of the plurality of first pouch-type battery cells and the second negative electrode lead of each of the plurality of second pouch-type battery cells.

3. In paragraph 2, A battery cell assembly, wherein the first integrated circuit comprises a plurality of first sensing plates short-circuited to the first positive lead of each of the plurality of first pouch-type battery cells and the second negative lead of each of the plurality of second pouch-type battery cells.

4. In paragraph 1, A battery cell assembly, characterized in that the second integrated circuit is configured to detect a potential of the first negative lead of each of the plurality of first pouch-type battery cells and the second positive lead of each of the plurality of second pouch-type battery cells.

5. In paragraph 4, A battery cell assembly, wherein the second integrated circuit comprises a plurality of second sensing plates short-circuited to the first negative lead of each of the plurality of first pouch-type battery cells and the second positive lead of each of the plurality of second pouch-type battery cells.

6. In paragraph 1, A battery cell assembly characterized in that the third integrated circuit includes a CMC (Cell Management Controller).

7. In paragraph 1, A battery cell assembly characterized in that the lead cover assembly includes an integrated circuit cover coupled to a lead cover frame coupled to the first bus bar frame and covering the third integrated circuit.

8. In paragraph 1, A battery cell assembly further comprising a first connection cable connected to each of the first integrated circuit and the third integrated circuit.

9. In paragraph 8, The above lead cover frame includes a first slit, and A battery cell assembly, characterized in that the first connecting cable is connected to the third integrated circuit through the first slit.

10. In paragraph 1, A battery cell assembly further comprising a second connecting cable connected to each of the second integrated circuit and the third integrated circuit.

11. In paragraph 10, The above lead cover frame includes a second slit, and A battery cell assembly, characterized in that the second connecting cable is connected to the third integrated circuit through the second slit.

12. In paragraph 1, A battery cell assembly further comprising a first connecting cable connected to each of the first integrated circuit and the second integrated circuit.

13. In paragraph 1, A battery cell assembly further comprising a second connection cable connected to each of the first integrated circuit and the third integrated circuit.

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