Battery cell assembly

Abstract

A battery cell assembly is provided according to an example embodiment. A battery cell assembly includes a battery cell stack, a first bus bar frame and a second bus bar frame coupled to the battery cell stack, a first integrated circuit on the first bus bar frame, a second integrated circuit on the second bus bar frame, and a lead cover assembly coupled to the first bus bar frame, the lead cover assembly includes a lead cover frame coupled to the first bus bar frame and a third integrated circuit on the lead cover frame.

Description

Technical Field

[0001] The present disclosure relates to a battery cell assembly. This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0076999, filed on Jun. 15, 2023, the entire contents of which are incorporated herein by reference. Background Art

[0002] Unlike primary batteries, secondary batteries can be charged and discharged many times. Secondary batteries have been widely used as energy sources for various types of wireless devices (such as mobile phones, laptops, and cordless vacuum cleaners). Recently, as the manufacturing cost per unit capacity of secondary batteries has dropped sharply due to the improvement of energy density and economies of scale, and the mileage of electric vehicles (BEVs) has increased to the same level as that of fuel vehicles, the main use of secondary batteries is shifting from mobile devices to mobility.

[0003] Battery cell manufacturers are making huge capital expenditures to meet the rapidly growing demand for secondary batteries for mobility. Companies are increasing the productivity of each production line to maximize the return on invested capital, and to this end, various research is being continuously carried out to increase output and productivity. Summary of the invention

[0004] Technical issues

[0005] The present disclosure is directed to providing a battery cell assembly having improved productivity.

[0006] Technical Solution

[0007] An exemplary embodiment of the present disclosure provides a battery cell assembly. The battery cell assembly includes: a battery cell stack, the battery cell stack includes a plurality of first soft-pack type battery cells and a plurality of second soft-pack type battery cells, wherein each of the plurality of first soft-pack type battery cells includes a first positive lead and a first negative lead, and each of the plurality of second soft-pack type battery cells includes a second positive lead and a second negative lead; a first bus bar frame, the first bus bar frame is coupled to the battery cell stack; a first integrated circuit, the first integrated circuit is located on the first bus bar frame; a second bus bar frame, the second bus bar frame is coupled to the battery cell stack; a second integrated circuit, the second integrated circuit is located on the second bus bar frame; and a lead cover assembly, the lead cover assembly is 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 located on the lead cover frame.

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

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

[0010] The second integrated circuit may be configured to sense a potential of a first negative lead of each of the plurality of first pouch type battery cells and a potential of a second positive lead of each of the plurality of second pouch type battery cells.

[0011] The second integrated circuit may include a plurality of second sensing plates short-circuited with a first negative lead of each of the plurality of first pouch-type battery cells and a second positive lead of each of the plurality of second pouch-type battery cells.

[0012] The third integrated circuit may include a cell management controller (CMC).

[0013] The lead cover assembly may include an integrated circuit cover coupled to the lead cover frame coupled to the first bus bar frame and configured to cover the third integrated circuit.

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

[0015] The lead cover frame may include a first slit, and the first connection cable may be connected to the third integrated circuit through the first slit.

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

[0017] The lead cover frame may include a second slit, and the second connection cable may be connected to the third integrated circuit through the second slit.

[0018] The battery cell assembly may further include a first connection cable connected to each of the first integrated circuit and the second integrated circuit.

[0019] The battery cell assembly may further include a second connection cable connected to each of the first integrated circuit and the third integrated circuit.

[0020] Beneficial Effects

[0021] The battery cell management controller (CMC) of the battery cell assembly according to the exemplary embodiment of the present disclosure may be mounted on the lead cover frame. Therefore, it is possible to prevent the CMC from being damaged when welding the electrode lead, and to improve the yield and productivity of the battery cell assembly.

[0022] The effects that can be achieved by the exemplary embodiments of the present disclosure are not limited to the above effects, and those skilled in the art to which the exemplary embodiments of the present disclosure belong will clearly obtain and understand other effects not described herein from the following description. That is, those skilled in the art can derive from the exemplary embodiments of the present disclosure the unexpected effects achieved when implementing the exemplary embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a perspective view of a battery cell assembly according to example embodiments.

[0024] Figure 2 It is an exploded perspective view of a battery cell assembly.

[0025] Figure 3 yes Figure 2 A partially enlarged stereogram of a portion of .

[0026] Figure 4 It is an exploded perspective view of a battery cell assembly.

[0027] Figure 5 yes Figure 4 A partially enlarged stereogram of a portion of .

[0028] Figure 6 is an exploded perspective view of the lead cover assembly.

[0029] Figure 7 It is a plan view of a battery cell stack.

[0030] Figure 8 is a perspective view of a battery cell assembly according to example embodiments.

[0031] Fig. 9 It is an exploded perspective view of a battery cell assembly.

[0032] Fig.10 yes Fig. 9 A partially enlarged stereogram of a portion of . DETAILED DESCRIPTION

[0033] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before describing the embodiments of the present disclosure, the terms or expressions used in the present specification and claims should not be interpreted as being limited to those generally understood or defined in a commonly used dictionary, but should be understood based on the principle that the inventor of the present application can appropriately define the terms or expressions to best interpret the present disclosure according to the meaning and concept consistent with the present disclosure.

[0034] Therefore, the embodiments described herein and the configurations shown in the accompanying drawings are merely examples of the present disclosure and do not reflect the entire technical concept of the present disclosure, and it should be understood that various equivalents and modifications replacing these configurations have been made on the filing date of the present application.

[0035] When it is determined that a known configuration or function related to describing the present disclosure would obscure the subject matter of the present disclosure due to unnecessary detail, it will not be described in detail.

[0036] Since the embodiments of the present disclosure are provided to explain the present disclosure more comprehensively to those skilled in the art, the shapes, sizes, etc. of the components shown in the drawings may be exaggerated, omitted, or schematically illustrated for the sake of clarity. Therefore, it should not be understood that the sizes or ratios of the components fully reflect their actual sizes or ratios.

[0037] (First embodiment)

[0038] Figure 1 is a perspective view of a battery cell assembly 120 according to an example embodiment.

[0039] Figure 2 It is an exploded perspective view of the battery cell assembly 120 .

[0040] Figure 3 yes Figure 2 A partially enlarged stereogram of a portion of .

[0041] Figure 4 It is an exploded perspective view of the battery cell assembly 120 .

[0042] Figure 5 yes Figure 4 A partially enlarged stereogram of a portion of .

[0043] Figure 6 is an exploded perspective view of the lead cover assembly.

[0044] Figure 7 It is a plan view of a battery cell stack.

[0045] Reference Figures 1 to 7 The battery cell assembly 120 may include a battery cell stack CS, a first bus bar 123P and a second bus bar 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 127R.

[0046] According to example embodiments, the battery cell stack CS may include a plurality of soft pack 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, and 121_20 (hereinafter, also referred to as 121_1 to 121_20) and a plurality of separators 122.

[0047] Each of the plurality of soft-pack type battery cells 121_1 to 121_20 may include a positive lead 121P, a negative lead 121N, an electrode assembly, and a soft-pack case. The soft-pack case may cover the electrode assembly. The electrode assembly may be included in the soft-pack case. The electrode assembly may include a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode.

[0048] According to the assembly form, the electrode assembly may be a wound electrode assembly or a stacked electrode assembly. The wound electrode assembly may include a structure in which a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode are wound together. The stacked electrode assembly may include a plurality of positive electrodes, a plurality of negative electrodes, and a plurality of separators interposed between the plurality of positive electrodes and the plurality of negative electrodes stacked in sequence.

[0049] The positive lead 121P may be connected to the positive electrode of the electrode assembly. The negative lead 121N may be connected to the negative electrode of the electrode assembly. The positive lead 121P and the negative lead 121N may protrude from the soft-pack shell to the outside. Each of the plurality of soft-pack type battery cells 121_1 to 121_20 may be a bidirectional battery cell. The positive lead 121P and the negative lead 121N may protrude from the soft-pack shell of each of the plurality of soft-pack type battery cells 121_1 to 121_20 in opposite directions.

[0050] The soft package housing may include a storage portion and a platform. The storage portion may provide a storage space for storing the electrode assembly. The storage space may be provided by a molding process. The storage portion may have a convex shape relative to the platform. The platform may include a sealing portion. The platform may surround the storage portion.

[0051] According to example embodiments, a plurality of pouch type battery cells 121_1 to 121_20 may be stacked in one direction. The direction in which the plurality of pouch type battery cells 121_1 to 121_20 are stacked may be substantially perpendicular to a direction in which the positive electrode lead 121P and the negative electrode lead 121N are spaced apart from each other.

[0052] According to example embodiments, each of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 may be referred to as a first soft-pack type battery cell. The soft-pack case, the positive lead 121P, and the negative lead 121N of each of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 may be referred to as a first soft-pack case, a first positive lead, and a first negative lead, respectively.

[0053] Each of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20 may be referred to as a second soft-pack type battery cell. The soft-pack case, the positive lead 121P, and the negative lead 121N of each of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20 may be referred to as a second soft-pack case, a second positive lead, and a second negative lead, respectively.

[0054] The negative electrode lead 121N of each of the plurality of pouch type battery cells 121_1 to 121_20 may be short-circuited with the positive electrode lead 121P of a subsequent one of the plurality of pouch type battery cells 121_1 to 121_20 .

[0055] According to example embodiments, the negative electrode lead 121N of the soft-pack type battery cell 121_1 may be coupled to the positive electrode lead 121P of the soft-pack type battery cell 121_2. According to example embodiments, the negative electrode lead 121N of the soft-pack type battery cell 121_1 may be welded to the positive electrode lead 121P of the soft-pack type battery cell 121_2. According to example embodiments, the negative electrode lead 121N of the soft-pack type battery cell 121_1 may be short-circuited with the positive electrode lead 121P of the soft-pack type battery cell 121_2.

[0056] According to example embodiments, the negative electrode lead 121N of the soft-pack type battery cell 121_2 may be coupled to the positive electrode lead 121P of the soft-pack type battery cell 121_3. According to example embodiments, the negative electrode lead 121N of the soft-pack type battery cell 121_2 may be welded to the positive electrode lead 121P of the soft-pack type battery cell 121_3. According to example embodiments, the negative electrode lead 121N of the soft-pack type battery cell 121_2 may be short-circuited with the positive electrode lead 121P of the soft-pack type battery cell 121_3.

[0057] According to example embodiments, the negative electrode lead 121N of the soft-pack type battery cell 121_3 may be coupled to the positive electrode lead 121P of the soft-pack type battery cell 121_4. According to example embodiments, the negative electrode lead 121N of the soft-pack type battery cell 121_3 may be welded to the positive electrode lead 121P of the soft-pack type battery cell 121_4. According to example embodiments, the negative electrode lead 121N of the soft-pack type battery cell 121_3 may be short-circuited with the positive electrode lead 121P of the soft-pack type battery cell 121_4.

[0058] The connection relationship between the positive lead 121P and the negative lead 121N of each of the soft-pack 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 and 121_20 is substantially the same as the connection relationship described above with respect to the soft-pack type battery cells 121_1, 121_2, 121_3 and 121_4, and thus a redundant description thereof is omitted here.

[0059] The plurality of diaphragms 122 may horizontally support the plurality of soft-pack type battery cells 121_1 to 121_20 to prevent the plurality of soft-pack type battery cells 121_1 to 121_20 from expanding. According to example embodiments, the plurality of diaphragms 122 may be heat insulators. According to example embodiments, each of the plurality of diaphragms 122 may have a high melting temperature and low thermal conductivity. According to example embodiments, each of the plurality of diaphragms 122 may include flame retardant materials such as ceramics and coated glass fibers. According to example embodiments, each of the plurality of diaphragms 122 may be configured to discharge flame retardant materials and fire extinguishing agents in the event of a thermal runaway event.

[0060] Each of the first bus bar frame 124F and the second bus bar frame 124R may be coupled to the battery cell stack CS. The first bus bar frame 124F may support a positive electrode lead 121P of each of the odd-numbered soft pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and a negative electrode lead 121N of each of the even-numbered soft pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20. The second bus bar frame 124R may support a 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, and 121_19 and a 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, and 121_20.

[0061] The first bus bar frame 124F may also support the first bus bar 123P and the second bus bar 123N. The first bus bar 123P may be coupled to the positive lead 121P of the soft-pack type battery cell 121_1. The first bus bar 123P may be welded to the positive lead 121P of the soft-pack type battery cell 121_1. The second bus bar 123N may be coupled to the negative lead 121N of the soft-pack type battery cell 121_20. The second bus bar 123N may be welded to the negative lead 121N of the soft-pack type battery cell 121_20. Therefore, the voltage of the battery cell stack CS may be output through the first bus bar 123P and the second bus bar 123N.

[0062] The first integrated circuit 125F may be mounted on the 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 sensing the potential of the positive lead 121P of each of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and the potential of the negative lead 121N of each of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20. Each of the plurality of first sensing plates 125FC may be short-circuited with a positive lead 121P of a corresponding one of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and a negative lead 121N of a corresponding one of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20.

[0063] For example, each of the plurality of first sensing plates 125FC may be welded to a positive electrode lead 121P of a corresponding one of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and a negative electrode lead 121N of a corresponding one of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20 by ultrasonic welding or the like. Therefore, the voltage of the positive lead 121P of each of the odd-numbered soft pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17 and 121_19 and the voltage of the negative lead 121N of each of the even-numbered soft pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18 and 121_20 may be output through the first integrated circuit 125F.

[0064] Figure 3 It is shown that each of the plurality of first sensing plates 125FC is inserted between the first bus bar frame 124F and the positive lead 121P of a corresponding one of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17 and 121_19 and the negative lead 121N of a corresponding one of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16 and 121_20, but the embodiment is not limited thereto.

[0065] Each of the plurality of first sensing plates 125FC may be spaced apart from the first bus bar frame 124F, and a positive lead 121P of a corresponding one of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and a negative lead 121N of a corresponding one of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20 may be located between each of the plurality of first sensing plates 125FC and the first bus bar frame 124F.

[0066] The second integrated circuit 125R may be mounted on the 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 sensing the potential of the negative lead 121N of each of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and the potential of the positive lead 121P of each of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20. Each of the plurality of second sensing plates 125RC may be short-circuited with a negative lead 121N of a corresponding one of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and a positive lead 121P of a corresponding one of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20.

[0067] For example, each of the plurality of second sensing plates 125RC may be welded to a negative electrode lead 121N of a corresponding one of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and a positive electrode lead 121P of a corresponding one of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20 by ultrasonic welding or the like. Therefore, the voltage of the negative lead 121N of each of the odd-numbered soft pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17 and 121_19 and the voltage of the positive lead 121P of each of the even-numbered soft pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18 and 121_20 may be output through the second integrated circuit 125R.

[0068] Figure 3 It is shown that each of the plurality of second sensing plates 125RC is inserted between the second bus bar frame 124R and the negative electrode lead 121N of a corresponding one of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17 and 121_19 and the positive electrode lead 121P of a corresponding one of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18 and 121_20, but the embodiment is not limited thereto.

[0069] Each of the plurality of second sensing plates 125RC may be spaced apart from the second bus bar frame 124R, and a negative electrode lead 121N of a corresponding one of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and a positive electrode lead 121P of a corresponding one of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20 may be located between each of the plurality of second sensing plates 125RC and the second bus bar frame 124R.

[0070] 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. For example, the lead cover frame 127FF may be fixed to the first bus bar frame 124F by heat fusion or interference fit. The lead cover frame 127FF may 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, and 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, and 121_20.

[0071] 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. For example, the third integrated circuit 127FIC may be fixed to the lead cover frame 127FF by heat fusion or the like.

[0072] The integrated circuit cover 127FC may be coupled to the lead cover frame 127FF. The integrated circuit cover 127FC may cover the 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.

[0073] According to the example embodiment, since the third integrated circuit 127FIC is mounted on the lead cap assembly 127F, it is possible to prevent the third integrated circuit 127FIC from being damaged when welding the positive lead 121P, the negative lead 121N, the first sensing plate 125FC, and the second sensing plate 125RC of each of the plurality of battery cells 121_1 to 121_20. In addition, even when the third integrated circuit 127FIC fails, only one of the third integrated circuit 127FIC and the lead cap assembly 127F can be replaced, thus preventing the entire battery cell assembly 120 from being discarded. Therefore, the productivity and yield of the secondary battery can be improved.

[0074] According to example 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 the plurality of pouch type battery cells 121_1 to 121_20.

[0075] Monitoring of the plurality of soft pack type battery cells 121_1 to 121_20 may include measuring voltage and current of a portion of internal nodes in the battery cell stack CS and measuring temperature of a preset position in the battery cell stack CS. The third integrated circuit 127FIC may include a temperature sensor or be electrically connected to a temperature sensor adjacent to the battery cell stack CS.

[0076] The balancing of the plurality of soft-pack type battery cells 121_1 to 121_20 is a work of reducing the deviation between the plurality of soft-pack type battery cells 121_1 to 121_20. By monitoring and balancing the plurality of soft-pack type battery cells 121_1 to 121_20, the battery cell stack CS can be operated under optimal conditions, thereby preventing the service life of each of the plurality of soft-pack type battery cells 121_1 to 121_20 from being shortened.

[0077] The lead cover 127R may be coupled to the second bus bar frame 124R. For example, the lead cover 127R may be fixed to the second bus bar frame 124R by heat fusion or interference fit. The lead cover 127R may cover the negative electrode lead 121N of each of the odd-numbered soft-pack type battery cells 121_1, 121_3, 121_5, 121_7, 121_9, 121_11, 121_13, 121_15, 121_17, and 121_19 and the positive electrode lead 121P of each of the even-numbered soft-pack type battery cells 121_2, 121_4, 121_6, 121_8, 121_10, 121_12, 121_14, 121_16, 121_18, and 121_20. The lead cover 127R may include an insulating material.

[0078] The first connection cable 126F may connect the first integrated circuit 125F and the third integrated circuit 127FIC. The first connection cable 126F may be connected to each of the first integrated circuit 125F and the third integrated circuit 127FIC. The first connection cable 126F may be directly connected to each of the first integrated circuit 125F and the third integrated circuit 127FIC. The first connection cable 126F may be connected to the third integrated circuit 127FIC through the first slit 127S1 of the lead cover frame 127FF. The voltage sensed by the first integrated circuit 125F may be transmitted to the third integrated circuit 127FIC through the first connection cable 126F.

[0079] The second connection cable 126R may connect the second integrated circuit 125R and the third integrated circuit 127FIC. The second connection cable 126R may be connected to each of the second integrated circuit 125R and the third integrated circuit 127FIC. The second connection cable 126R may be directly connected to each of the second integrated circuit 125R and the third integrated circuit 127FIC. The second connection cable 126R may be connected to the third integrated circuit 127FIC through the second slit 127S2 of the lead cover frame 127FF. The voltage sensed by the second integrated circuit 125R may be transmitted to the third integrated circuit 127FIC through the second connection cable 126R.

[0080] (Second embodiment)

[0081] Figure 8 is a perspective view of a battery cell assembly according to example embodiments.

[0082] Fig. 9 It is an exploded perspective view of a battery cell assembly.

[0083] Fig.10 yes Fig. 9 A partially enlarged stereogram of a portion of .

[0084] Reference Figures 8 to 10 The battery cell assembly 120' may include a battery cell stack CS, a first bus bar 123P and a second bus bar 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 127R.

[0085] The battery cell stack CS, the first bus bar 123P and the second bus bar 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 127R are the same as those described above. Figures 1 to 7 The contents described are basically the same, so their redundant descriptions are omitted here.

[0086] According to an example embodiment, 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. The voltage sensed by the second integrated circuit 125R may be transmitted to the first integrated circuit 125F through the second connection cable 126R.

[0087] 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' include a first slit 127S1, and the second slit 127S2 is not provided (see Figure 3 ) (ie, only the first slit 127S1 is provided), and the lead cover frame 127FF (see Figure 3 ) and IC cover 127FC (see Figure 3 ) are basically the same.

[0088] The first connection cable 126F may connect the first integrated circuit 125F and the third integrated circuit 127FIC'. The first connection cable 126F may be connected to each of the first integrated circuit 125F and the third integrated circuit 127FIC'. The first connection cable 126F may be directly connected to each of the first integrated circuit 125F and the third integrated circuit 127FIC'. The first connection cable 126F may be connected to the third integrated circuit 127FIC' through the first slit 127S1 of the lead cover frame 127FF. The voltage sensed by the first integrated circuit 125F and the voltage sensed by the second integrated circuit 125R may be transmitted to the third integrated circuit 127FIC' through the first connection cable 126F.

[0089] According to example embodiments, the third integrated circuit 127FIC′ may include a CMC and be configured to monitor and balance the plurality of pouch type battery cells 121 .

[0090] The present disclosure is described in more detail above with reference to the accompanying drawings, embodiments, etc. However, the configurations shown in the drawings or the embodiments described in this specification are merely embodiments of the present disclosure and do not reflect the entire technical concept of the present disclosure, and therefore it should be understood that various equivalents and modifications have been made to replace these configurations on the filing date of the present application.

Claims

1. A battery cell assembly, comprising: A battery cell stack, the battery cell stack comprising a plurality of first soft-pack type battery cells and a plurality of second soft-pack type battery cells, wherein each of the plurality of first soft-pack type battery cells comprises a first positive electrode lead and a first negative electrode lead, and each of the plurality of second soft-pack type battery cells comprises a second positive electrode lead and a second negative electrode lead; a first bus bar frame coupled to the battery cell stack; a first integrated circuit, the first integrated circuit being located on the first busbar frame; a second bus bar frame coupled to the battery cell stack; a second integrated circuit, the second integrated circuit being located 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 is located on the lead cover frame.

2. The battery cell assembly according to claim 1, wherein: The first integrated circuit is configured to sense a potential of the first positive lead of each of the plurality of first pouch-type battery cells and a potential of the second negative lead of each of the plurality of second pouch-type battery cells.

3. The battery cell assembly according to claim 2, wherein: The first integrated circuit includes a plurality of first sensing plates short-circuited with the first positive lead of each of the plurality of first soft-pack type battery cells and the second negative lead of each of the plurality of second soft-pack type battery cells.

4. The battery cell assembly according to claim 1, wherein: 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 a potential of the second positive lead of each of the plurality of second pouch-type battery cells.

5. The battery cell assembly according to claim 4, wherein: The second integrated circuit includes a plurality of second sensing plates that are short-circuited with the first negative lead of each of the plurality of first soft-pack type battery cells and the second positive lead of each of the plurality of second soft-pack type battery cells.

6. The battery cell assembly according to claim 1, wherein: The third integrated circuit includes a battery cell management controller, namely, CMC.

7. The battery cell assembly according to claim 1, wherein: The lead cover assembly includes an integrated circuit cover coupled to the lead cover frame coupled to the first bus bar frame and configured to cover the third integrated circuit. 8 . The battery cell assembly of claim 1 , further comprising a first connection cable connected to each of the first integrated circuit and the third integrated circuit.

9. The battery cell assembly according to claim 8, wherein: The lead cover frame includes a first slit, and The first connection cable is connected to the third integrated circuit through the first slit. 10 . The battery cell assembly of claim 1 , further comprising a second connection cable connected to each of the second integrated circuit and the third integrated circuit.

11. The battery cell assembly according to claim 10, wherein: The lead cover frame includes a second slit, and The second connection cable is connected to the third integrated circuit through the second slit. 12 . The battery cell assembly of claim 1 , further comprising a first connection cable connected to each of the first integrated circuit and the second integrated circuit. 13 . The battery cell assembly of claim 1 , further comprising a second connection cable connected to each of the first integrated circuit and the third integrated circuit.

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