Fastening device and battery pack comprising same

Abstract

Disclosed are a fastening device and a battery pack including the same, the fastening device of the battery pack for fastening an electrical connection between a battery module and a circuit board managing the battery module, the fastening device including: a substrate including a plurality of fastening holes; a plurality of connection circuit boards coupled to a surface of the substrate facing the circuit board and electrically connecting the battery module and the circuit board when in contact with the circuit board; and a plurality of fastening hooks configured to be fastened to the plurality of fastening holes and capable of fixing a position of the substrate such that the plurality of connection circuit boards are in contact with the circuit board, each of the plurality of connection circuit boards including: a first end portion electrically connected to the battery module; and a second end portion coupled to the substrate and electrically connected to the circuit board when in contact with the circuit board.

Description

Technical Field

[0001] Embodiments relate to a fastening device and a battery pack including the fastening device. Background Art

[0002] Secondary batteries differ from primary batteries that only provide irreversible conversion of chemical materials into electrical energy in that charging and discharging can be repeated. Low-capacity secondary batteries are used as power supply devices for small electronic devices such as mobile phones, laptops, and cameras, and high-capacity secondary batteries are used as power supply devices for electric vehicles, hybrid vehicles, energy storage systems (ESS), etc. Summary of the invention

[0003] An embodiment relates to a fastening device for a battery pack, for fastening the electrical connection between a battery module and a circuit board that manages the battery module, the fastening device comprising: a substrate comprising a plurality of fastening holes; a plurality of connecting circuit boards connected to a surface of the substrate facing the circuit board and electrically connecting the battery module and the circuit board when in contact with the circuit board; and a plurality of fastening hooks configured to be fastened to the plurality of fastening holes, capable of fixing the position of the substrate so that the plurality of connecting circuit boards are in contact with the circuit board, the plurality of connecting circuit boards each comprising: a first end portion electrically connected to the battery module; and a second end portion connected to the substrate and electrically connected to the circuit board when in contact with the circuit board.

[0004] In an embodiment, the second end portion may include a contact pad that contacts a conductive pad of the circuit board when each of the plurality of connected circuit boards contacts the circuit board, and the contact pad may be electrically connected to the first end portion.

[0005] In an embodiment, each of the plurality of connection circuit boards may be a flexible connection circuit board, and the first end portion may be separated from the substrate.

[0006] In an embodiment, the first end portion may be coupled to a bus bar of the battery pack and electrically connected to the battery module through the bus bar.

[0007] In an embodiment, each of the plurality of fastening hooks may include: a fastening column including a first end portion connected to a fixing structure having a fixed position in the battery pack and a second end portion inserted into a corresponding fastening hole among the plurality of fastening holes; and an elastic hook connected to an outer surface of the fastening column and having a variable protrusion height by applying pressure.

[0008] In an embodiment, the elastic hook may have a shape in which a width becomes narrower as it approaches the second end portion of the fastening post.

[0009] In an embodiment, the elastic hook may protrude from the outer surface of the fastening column so as not to pass through the corresponding fastening hole in an unpressurized state, and when the substrate is pressed in a state in which the fastening column can be inserted into the corresponding fastening hole, the protrusion height is reduced due to the pressure of pressing the substrate, so that the elastic hook passes through the corresponding fastening hole.

[0010] In an embodiment, the elastic hook may operate as a stopper that fixes a position of the substrate in a state in which the plurality of fastening hooks are fastened to the plurality of fastening holes.

[0011] In an embodiment, the cylindrical spring surrounding the fastening post may have a diameter greater than a diameter of the plurality of fastening holes.

[0012] In an embodiment, the first end portion of the fastening post may be coupled to a bus bar of the battery pack.

[0013] In an embodiment, the first end portion of the fastening column may be coupled to an upper frame of the battery pack.

[0014] In an embodiment, the substrate may be a transparent substrate.

[0015] An embodiment relates to a battery pack, comprising: the fastening device; a battery module, including a plurality of battery cells; and a circuit board, on which are mounted at least one integrated circuit (IC), a plurality of conductive pads, and a power supply circuit, the power supply circuit supplying an operating voltage to the at least one integrated circuit (IC) by using a voltage input through the plurality of conductive pads.

[0016] In an embodiment, when the plurality of fastening hooks are fastened to the plurality of fastening holes, the second end portion of each of the plurality of connection circuit boards may be pressed by the substrate to contact a corresponding one of the plurality of conductive pads.

[0017] In an embodiment, the circuit board may include a main board and a plurality of connection structures extending from the main board and providing a flexible connection between the plurality of conductive pads and the main board.

[0018] In an embodiment, the plurality of connection structures may be meander-shaped structures or spring-like structures formed by removing a portion of an outer portion of a board material constituting the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Features will become apparent to those skilled in the art by describing in detail exemplary embodiments with reference to the accompanying drawings, in which:

[0020] Figure 1 is a schematic configuration diagram of a battery pack according to an embodiment.

[0021] Figure 2 According to one embodiment, Figure 1 Schematic diagram of the PCB in the management device.

[0022] Figure 3 to Figure 5 2 is a diagram illustrating a method of fastening or disconnecting an electrical connection between a management device and a battery module using a fastening device according to an embodiment. DETAILED DESCRIPTION

[0023] Hereinafter, example embodiments will be more fully described with reference to the accompanying drawings; however, they may be implemented in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the exemplary implementations to those skilled in the art. The same reference numerals refer to the same elements throughout.

[0024] In this specification, the term "and / or" includes all combinations or random combinations of multiple items that are related and arranged. When describing the embodiments of the present disclosure, the use of "may" means "one or more embodiments of the present disclosure". In the following description of the embodiments of the present disclosure, a singular term may include a plural form unless stated otherwise. As used herein, the term "or" is not an exclusive term, for example, "A or B" includes A, B, or A and B.

[0025] Terms including ordinal numbers (such as first, second, third, etc.) will only be used to describe various components and should not be interpreted as limiting these components. These terms are only used to distinguish one component from other components. For example, a first component element may be referred to as a second component element, and similarly, a second component element may be referred to as a first component element without departing from the scope of the present disclosure.

[0026] It will be understood that when a component element or layer is referred to as being “on,” “connected to,” or “coupled to” another component element or layer, it may be directly on, connected to, or coupled to the other component element or layer, or one or more intervening components or layers may be present. Furthermore, it will be understood that when a component element or layer is referred to as being “between” two components or layers, it may be the only component element or layer between the two components or layers, or one or more intervening components or layers may also be present.

[0027] Electrically connecting two components includes directly connecting the two components, and connecting the two components with another component therebetween. The other component may include a switch, a resistor, and a capacitor. When describing the embodiments, the expression of connection indicates electrical connection when no expression of direct connection is provided.

[0028] Figure 1 is a schematic configuration diagram of a battery pack according to an embodiment.

[0029] refer to Figure 1 The battery pack 1 may include a battery module 10 , a management device 20 and a fastening device 30 .

[0030] The battery module 10 may include a plurality of battery cells connected in series and / or in parallel with each other.

[0031] The management device 20 may operate as a battery management module (BMM) that performs functions for status (e.g., voltage, current, temperature, etc.), measurement, cell balancing, charge / discharge control, and communication of the battery module 10. The management device 20 may include an interface circuit 21, a balancing circuit 22, a power circuit 23, an analog front end (AFE) integrated circuit (IC) 24, and a communication IC 25.

[0032] The interface circuit 21 , the balancing circuit 22 , and the power circuit 23 may be electrically connected to a plurality of battery cells included in the battery module 10 through the fastening device 30 .

[0033] The interface circuit 21 may perform a function of transmitting the voltage of the battery cell to the AFE IC 24 so that the AFE IC 24 may detect the cell voltage of the battery cell included in the battery module 10 .

[0034] The balancing circuit 22 may perform a cell balancing function between battery cells included in the battery module 10 under the control of the AFE IC 24 .

[0035] The power circuit 23 may be electrically connected to the battery module 10 through the fastening device 30. If the power circuit 23 is electrically connected to the battery module 10, it may supply an operating voltage for operating the management device 20 by using a voltage supplied from the battery module 10. That is, if the module voltage of the battery module 10 is input to the power circuit 23 through the fastening device 30, the power circuit 23 may convert the input module voltage into a voltage required for the operation of the AFE IC 24 and the communication IC 25 to output it. In one embodiment, if the electrical connection between the power circuit 23 and the battery module 10 is disconnected by the fastening device 30, the supply of the operating voltage of the power circuit 23 may be stopped.

[0036] In addition, the power supply circuit 23 can perform a reset function of ICs (e.g., AFE IC 24 and communication IC 25). The power supply circuit 23 can detect a failure of at least one IC by using a watchdog function or based on a status signal input from a separate monitoring device. If a failure of at least one IC is detected, the power supply circuit 23 can output a reset signal to the IC in which the failure is detected, thereby performing a function of resetting the corresponding IC.

[0037] The AFE IC 24 may be connected to the battery module 10 through the fastening device 30 and the interface circuit 21 to measure the state of the battery module 10, such as the cell voltage of the battery cells included in the battery module 10. The AFE IC 24 may control the balancing circuit 22 based on the measured state of the battery module 10 to perform cell balancing between the battery cells included in the battery module 10. The AFE IC 24 may communicate with a higher-level controller or an external controller through the communication IC 25. In one embodiment, the AFE IC 24 may transmit state information measured from the battery module 10 to the higher-level controller or receive control information from the higher-level controller through the communication IC 25.

[0038] The communication IC 25 may support wired or wireless communication between the AFE IC 24 and a higher-level controller (or an external controller).

[0039] The AFE IC 24 and the communication IC 25 may receive an operation voltage from the power circuit 23. If the operation voltage supplied from the power circuit 23 is blocked for a predetermined time and then supplied again, the AFE IC 24 and the communication IC 25 may restart in a reset state by power reset.

[0040] If a reset signal is received from the power supply circuit 23 , the AFE IC 24 and the communication IC 25 may be reset and then restarted.

[0041] The management device 20 may further include a circuit board, such as a printed circuit board (PCB) (see Figure 2 That is, the management device 20 may be implemented in a form in which circuits for implementing the above-mentioned constituent elements (ie, the interface circuit 21, the balancing circuit 22, the power supply circuit 23, the AFE IC 24, and the communication IC 25) may be mounted on a PCB 40.

[0042] Figure 2 is an example of a PCB included in the management device 20 according to an embodiment.

[0043] refer to Figure 2, the PCB 40 may include a main board 41. The PCB 40 may further include openings 42, 43 formed by removing a portion of the board material by milling or the like.

[0044] The PCB 40 may include a plurality of pad portions 45 outside the main board 41. Each pad portion 45 may include a connection structure or a connection portion 452 extending from the main board 41 and a conductive pad 451 formed on one surface of each connection portion 452. The conductive pad 451 may be formed on one surface of the connection portion 452 by using a conductive material such as nickel.

[0045] Each conductive pad 451 may be electrically connected to a battery cell included in the battery module 10 through the fastening device 30. Each conductive pad 451 may be electrically connected to a circuit (e.g., an interface circuit 21, a balancing circuit 22, a power circuit 23, etc.) mounted on the PCB 40 through a line formed on the PCB 40. In one embodiment, each conductive pad 451 may be used to transmit a voltage transmitted from the battery module 10 through the fastening device 30 to a circuit constituting the management device 20.

[0046] The connection portion 452 may provide a flexible connection between the main board 41 and each conductive pad 451. In order to reduce the mechanical stress transmitted to the main board 41 through each pad portion 45 during the process of fastening the PCB 40 to the fastening device 30, each connection portion 452 may include a meander-shaped structure or a spring-like structure. Each connection portion 452 may be formed by removing a portion of an outer portion of a plate material constituting the PCB 40 by milling or the like. A wire or the like for providing an electrical connection between each conductive pad 451 and a circuit mounted on the PCB 40 may be formed in each connection portion 452.

[0047] The PCB 40 may be configured as a flexible PCB or a FR-4 PCB.

[0048] Return to reference Figure 1 , the fastening device 30 may fasten or disconnect the electrical connection between the battery cells included in the battery module 10 and the management device 20 .

[0049] The fastening device 30 may be configured to fasten or disconnect the electrical connection between the battery module 10 and the management device 20 in a hook method without soldering or welding, so as to facilitate not only electrical fastening but also electrical disconnection.

[0050] Figure 3 to Figure 5 is a diagram illustrating a method of fastening or disconnecting an electrical connection between a management device 20 and a battery module 10 using a fastening device 30 according to an embodiment. Figure 3 3 is a diagram viewed from the top of the PCB 40 when the fastening device 30 and the PCB 40 of the management device 20 are fastened. Figure 4 is a view viewed from the side of the PCB 40 when the electrical connection between the PCB 40 of the management device 20 and the battery cell 11 is disconnected by the fastening device 30, Figure 5 1 is a diagram viewed from the side of the PCB 40 when the electrical connection between the PCB 40 of the management device 20 and the battery cell 11 is fastened by the fastening device 30 .

[0051] refer to Figure 3 to Figure 5 The fastening device 30 may include a plurality of substrates 31 , 32 , a plurality of connection circuit boards such as a flexible connection PCB 33 coupled to surfaces of the respective substrates 31 , 32 facing the PCB 40 , a plurality of fastening hooks 35 , and a plurality of springs 36 .

[0052] The substrates 31 and 32 can be used to keep the plurality of flexible connection PCBs 33 in contact with the PCB 40 of the management device 20, or to separate the plurality of flexible connection PCBs 33 from the PCB 40. In a state where the PCB 40 of the management device 20 is fixed below the substrates 31 and 32, the plurality of flexible connection PCBs 33 can be brought into contact with the PCB 40 by pressing the substrates 31 and 32 or separated from the PCB 40 by moving the substrates 31 and 32 upward, for example, Figure 4 and Figure 5 As can be seen in FIG. 4 , if the substrates 31, 32 are pressed toward the PCB 40, the plurality of flexible connection PCBs 33 may be in contact with the PCB 40. In addition, if the substrates 31, 32 are moved away from the PCB 40, the plurality of flexible connection PCBs 33 may be separated from the PCB 40.

[0053] The fastening hooks 35 may be fastened to the corresponding substrates 31 , 32 , and may fix the positions of the corresponding substrates 31 , 32 so that the plurality of flexible connection PCBs 33 remain in contact with the PCB 40 of the management device 20 .

[0054] Each of the base plates 31, 32 may include a plurality of fastening holes 34, to which the fastening hooks 35 may be fastened, for example, inserted. The fastening hooks 35 may be operated in a hook manner so that the coupling with the base plates 31, 32 may be easily fastened or disconnected. Each fastening hook 35 may include a fastening post 351 and an elastic hook 352 coupled to the outer surface of the fastening post 351.

[0055] One of the two end portions of the fastening column 351, for example, the first end portion, may be coupled to a fixing structure that maintains a fixed position in the battery pack 1, and the other, for example, the second end portion, may be inserted and coupled to the corresponding fastening hole 34. Figure 4 and Figure 5One end portion of each fastening column 351 may be fixedly coupled to the upper frame 52 (or the bracket bus bar assembly) included in the bus bar assembly of the battery pack 1. However, one end portion of the fastening column 351 may be coupled to another structure such as a bus bar that maintains a fixed position.

[0056] If the fastening columns 351 corresponding to the respective fastening holes 34 of the substrates 31, 32 are inserted, the substrates 31, 32 can move in the vertical direction along the fastening columns 351. The elastic hooks 352 can fix the positions of the substrates 31, 32 into which the fastening columns 351 are inserted at a predetermined position, or release the position fixation of the substrates 31, 32.

[0057] The degree to which the elastic hook 352 protrudes from the outer surface of the fastening column 351 (i.e., the protrusion height) may vary according to the pressure applied from the outside. In the initial state where no pressure is applied, the elastic hook 352 may maintain the initial state of maximum protrusion from the outer surface of the fastening column 351 by elastic force. Figure 4 In the initial state, the elastic hook 352 cannot pass through the fastening hole 34 of the base plates 31 and 32 due to its protruding height.

[0058] If pressure is applied to the elastic hook 352 in the initial state, the protruding height of the elastic hook 352 can be reduced due to the pressure. The elastic hook 352 can be configured to have a triangular shape, which has a narrower width toward the upper side (i.e., the non-fixed end side of the fastening column 351), for example, as it approaches the second end portion of the fastening column 351. Due to this structure, some of the pressure pressing the substrates 31, 32 can be transmitted as a force opposite to the elastic force of the elastic hook 352. In one embodiment, the protruding height of the elastic hook 352 can be reduced by the pressure pressing the substrates 31, 32, so that the elastic hook 352 can pass through the fastening hole 34. If the elastic hook 352 completely passes through the fastening hole 34, the pressure applied to the elastic hook 352 by the pressure pressing the substrates 31, 32 can be released, and the elastic hook 352 can be restored to its initial state by the elastic force. Figure 5 As shown in , the elastic hook 352 restored to its original state may operate as a stopper to fix the positions of the base plates 31 , 32 , thereby maintaining the fastened state between the base plates 31 , 32 and the fastening hook 35 .

[0059] If pressure is applied to the elastic hook 352 while the substrate 31, 32 is engaged with the fastening hook 35, the protruding height of the elastic hook 352 can be reduced. If the protruding height of the elastic hook 352 is reduced to the extent that the elastic hook 352 can pass through the fastening hole 34, the position fixation performed by the elastic hook 352 can be released, and the substrate 31, 32 can move upward. In one embodiment, cylindrical springs 36 surrounding the fastening column 351 respectively can be provided on the lower surface of the substrate 31, 32. The spring 36 can press the substrate 31, 32 in the upward direction respectively by elastic force. In one embodiment, if the staff presses the elastic hook 352 and the position fixation performed by the elastic hook 352 is released, the spring 36 can press the substrate 31, 32, and the fastened state between the substrate 31, 32 and the fastening hook 35 can be released. Each spring 36 can have a diameter larger than the diameter of the fastening hole 34 so that it cannot pass through the fastening hole 34.

[0060] A plurality of flexible connection PCBs 33 may be coupled to the lower surface of each of the substrates 31, 32. Figure 5 As shown in FIG. 3 , if the substrates 31 and 32 are fastened with the fastening hooks 35, the plurality of flexible connection PCBs 33 may be pressed downward by the substrates 31 and 32 so that the plurality of flexible connection PCBs 33 and the PCB 40 may contact each other. Figure 4 As shown in , if the fastening between the substrates 31, 32 and the fastening hooks 35 is released, the plurality of flexible connection PCBs 33 can be moved upward by the substrates 31, 32, so that the plurality of flexible connection PCBs 33 and the PCB 40 can be spaced apart from each other. The corresponding substrates 31, 32 can simultaneously move the plurality of flexible connection PCBs 33 to simultaneously make the plurality of flexible connection PCBs 33 contact or separate from the PCB 40. In one embodiment, the substrates 31, 32 can reduce the number of repetitions of the fastening work between the flexible connection PCBs 33 and the PCB 40. At the same time, Figure 3 to Figure 5 In the embodiment, the case where two substrates 31, 32 are used to fasten or disconnect the electrical connection between the plurality of flexible connection PCBs 33 and PCB 40 is illustrated as an example, but the number of substrates may be changed more or less.

[0061] The substrates 31 , 32 may be configured as transparent substrates made of a transparent insulating material such as transparent acrylic so that a fastening state between the plurality of flexible connection PCBs 33 and the PCB 40 may be checked with naked eyes.

[0062] A plurality of flexible connection PCBs 33 may be used to electrically connect the conductive pads 451 of the PCB 40 and the battery cells 11. Each flexible connection PCB 33 may include an insulating substrate, a contact pad 331 formed on the insulating substrate, and a wire electrically connected to the contact pad 331. Each flexible connection PCB 33 may be configured as a flexible PCB.

[0063] A first end portion or one end portion of each flexible connection PCB 33 may be coupled to a corresponding bus bar 51 and electrically connected to the battery module 10 through the corresponding bus bar 51. In one embodiment, one end portion may be separated from the corresponding substrate 31, 32. Each flexible connection PCB 33 may be coupled to the bus bar 51 by using soldering, an anisotropic conductive film (ACF), etc. In one embodiment, each flexible connection PCB 33 (e.g., a wire of each flexible connection PCB 33) may be electrically connected to the bus bar 51.

[0064] The second end portion or the other end portion of each flexible connection PCB 33 may be coupled to the lower surface of the corresponding substrate 31, 32. The corresponding flexible connection PCB 33 may be attached to the lower surface of the corresponding substrate 31, 32 by using an adhesive film, an adhesive, etc. The contact pad 331 may be provided on the lower surface of the end portion of the corresponding flexible connection PCB 33 coupled to the substrate 31, 32. The contact pad 331 is a pad for contacting the conductive pad 451 of the PCB 40. In one embodiment, the contact pad 331 may be electrically connected to one end portion of the flexible connection PCB 33. In one embodiment, the position at which the corresponding flexible connection PCB 33 is coupled to the substrate 31, 32 may be determined so that the contact pad 331 faces the conductive pad 451. The contact pad 331 may be a conductive pad treated with carbon. In one embodiment, if each contact pad 331 contacts the corresponding conductive pad 451, the contact pad 331 and the conductive pad 451 may be electrically connected to each other. In one embodiment, the conductive pads 451 may be electrically connected to the flexible connection PCB 33 through the contact pads 331 , and electrically connected to the corresponding bus bars 51 through the flexible connection PCB 33 .

[0065] Each contact pad 331 can be brought into contact with or separated from the conductive pad 451 of the PCB 40 by the movement of the substrates 31 and 32. Figure 4 , if the fastening between the substrates 31, 32 and the fastening hooks 35 is released and the substrates 31, 32 move in an upward direction, the contact pads 331 may move away from the PCB 40 and may be spaced apart from the corresponding conductive pads 451. Figure 5, if the substrates 31 , 32 and the fastening hooks 35 are fastened and the substrates 31 , 32 move in the downward direction, the contact pads 331 may contact the corresponding conductive pads 451 by pressing the substrates 31 , 32 .

[0066] As described above, in the battery pack 1 according to the embodiment, the fastening device 30 for fastening the electrical connection between the battery module 10 and the management device 20 can be operated in a hook manner without welding. Therefore, if the power reset of the management device 20 is required, the electrical connection between the battery module 10 and the management device 20 can be disconnected by simple manipulation, and even after the reset, the battery module 10 and the management device 20 can be electrically fastened by simple manipulation.

[0067] The electronic device or electrical device and / or other related devices or components according to the embodiments of the present disclosure can be implemented by using appropriate hardware, firmware (e.g., application specific integrated circuit), software or a combination of software, firmware and hardware. In one embodiment, various configurations of the above-mentioned device can be located on an integrated circuit (IC) chip or a separate IC chip. In addition, various configurations of the above-mentioned device can be implemented on a flexible printed circuit film, a carrier package (TCP), a printed circuit board (PCB) or a substrate. The electrical connection or interconnection described in this specification can be implemented, for example, by a line or a conductive element on a PCB, a different type of circuit carrier. The conductive element can, for example, include a metallization (such as a surface metallization) and / or a pin, and can include a conductive polymer or a ceramic.

[0068] In addition, various configurations of the device can be executed by one or more processors to perform the various functions described above, they can be executed in one or more computing devices, and they can be processes or threads for executing computer program instructions and interacting with other system components. Computer program instructions are stored in a memory that can be implemented in a computing device using a standard storage device (such as a random access memory (RAM)). Computer program instructions can also be stored in a non-transitory computer readable medium (such as a CD-ROM or a flash drive).

[0069] By summarizing and reviewing, generally, a secondary battery cell may include: an electrode assembly including a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode; a housing accommodating the electrode assembly; and an electrode terminal electrically connected to the electrode assembly. An electrolyte solution may be injected into the housing to enable the battery cell to be charged and discharged through an electrochemical reaction between the positive electrode and the negative electrode and the electrolyte solution. The shape of the housing (such as a cylindrical shape or a rectangular shape) depends on the purpose of the battery cell.

[0070] The battery cells may be connected to each other in series and / or in parallel to configure a battery module having a high energy density. A battery pack may include one or more of these battery modules according to the required specifications.

[0071] The battery pack may include a battery management system (BMS) for monitoring, controlling and / or setting the battery pack. Depending on its function, the BMS may include: a battery system manager (BSM) that can operate as a master control device, a battery management module (BMM) that can operate as a slave control device, and a battery disconnect unit (BDU) that can block or allow connection between the battery pack and an external device. The BMM can measure and balance the status (voltage, temperature, current, etc.) of the monomers included in the battery module, and transmit the status information and event occurrence information detected during the process to the BSM as the master control device.

[0072] To this end, the BMM may be configured to include at least one IC, such as an AFE IC, a communication IC, etc. If an IC included in the BMM operates abnormally, a method of resetting the corresponding IC may be used to restore the corresponding IC to a normal state. Typically, the reset function may be implemented by a circuit configuration in the BMM (e.g., a switching element (transistor, etc.), a logic gate circuit, etc.). On the other hand, if the circuit configuration in the BMM is used to reset the IC in the BMM, the corresponding IC may not be properly reset due to a failure of the reset function and often remains in a faulty state.

[0073] The present disclosure is to provide a fastening device and a battery pack including the same, which can force a power supply to be reset if a reset function of an IC included in a battery management system does not work. According to the present disclosure, if a reset function of an IC included in a battery management system does not work properly, the power supply can be forced to be reset.

[0074] Example embodiments are disclosed herein, and although specific terms are employed, they are used and interpreted in a general and descriptive sense only and not for purposes of limitation. In some cases, as will be apparent to one of ordinary skill in the art when filing this application, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise specifically stated. Accordingly, those skilled in the art will appreciate that various changes may be made in form and detail without departing from the spirit and scope of the invention as set forth in the claims.

Claims

1. A fastening device for a battery pack, used for fastening a battery module and managing the electrical connection between a circuit board of the battery module, the fastening device comprising: a base plate including a plurality of fastening holes; a plurality of connection circuit boards coupled to a surface of the base plate facing the circuit board and electrically connecting the battery module and the circuit board when in contact with the circuit board; and a plurality of fastening hooks configured to be fastened to the plurality of fastening holes, capable of fixing the position of the substrate so that the plurality of connection circuit boards are in contact with the circuit board, The plurality of connection circuit boards each include: a first end portion electrically connected to the battery module; and a second end portion coupled to the substrate and electrically connected to the circuit board when in contact with the circuit board.

2. The fastening device according to claim 1, wherein: The second end portion includes a contact pad that contacts a conductive pad of the circuit board when each of the plurality of connected circuit boards contacts the circuit board, and The contact pad is electrically connected to the first end portion.

3. The fastening device according to claim 2, wherein: Each of the plurality of connection circuit boards is a flexible connection circuit board, and The first end portion is separated from the substrate. 4 . The fastening device of claim 3 , wherein the first end portion is coupled to a bus bar of the battery pack and is electrically connected to the battery module through the bus bar.

5. The fastening device of claim 1, wherein each of the plurality of fastening hooks comprises: a fastening post including a first end portion coupled to a fixing structure having a fixed position in the battery pack and a second end portion inserted into a corresponding fastening hole among the plurality of fastening holes, and An elastic hook is coupled to an outer surface of the fastening column and has a variable protrusion height by being pressed. 6 . The fastening device according to claim 5 , wherein the elastic hook has a shape in which a width becomes narrower as it approaches the second end portion of the fastening post.

7. The fastening device according to claim 6, wherein the elastic hook protrudes from the outer surface of the fastening column so as not to pass through the corresponding fastening hole in an unpressurized state, and when the substrate is pressed in a state in which the fastening column is inserted into the corresponding fastening hole, the protrusion height is reduced due to the pressure of pressing the substrate, so that the elastic hook passes through the corresponding fastening hole. 8 . The fastening device according to claim 6 , wherein the elastic hook operates as a stopper that fixes a position of the substrate in a state in which the plurality of fastening hooks are fastened to the plurality of fastening holes. 9 . The fastening device of claim 5 , further comprising a cylindrical spring surrounding the fastening post, the cylindrical spring having a diameter greater than a diameter of the plurality of fastening holes. 10 . The fastening device of claim 5 , wherein the first end portion of the fastening post is coupled to a bus bar of the battery pack. 11 . The fastening device of claim 5 , wherein the first end portion of the fastening column is coupled to an upper frame of the battery pack.

12. The fastening device of claim 1, wherein the substrate is a transparent substrate.

13. A battery pack comprising: The fastening device according to any one of claims 1 to 12; A battery module, including a plurality of battery cells; as well as A circuit board on which at least one integrated circuit, a plurality of conductive pads, and a power circuit are mounted, the power circuit supplying an operating voltage to the at least one integrated circuit by using a voltage input through the plurality of conductive pads. 14 . The battery pack according to claim 13 , wherein when the plurality of fastening hooks are fastened to the plurality of fastening holes, the second end portion of each of the plurality of connection circuit boards is pressed by the substrate to contact a corresponding one of the plurality of conductive pads.

15. The battery pack of claim 13, wherein the circuit board comprises a main board and a plurality of connection structures extending from the main board and providing a flexible connection between the plurality of conductive pads and the main board. 16 . The battery pack according to claim 15 , wherein the plurality of connection structures are zigzag structures or spring-like structures formed by removing a portion of an outer portion of a plate material constituting the circuit board.

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