Temperature sensor assembly with easy-to-release lead wire and installation method of the same

Abstract

A temperature sensor assembly is disclosed that facilitates the disassembly of a lead wire after stacking the temperature sensor assembly onto a battery cell of an energy storage device, and a method for stacking the same onto a battery cell of an energy storage device and installing it by easily connecting the lead wire to an electronic device. A temperature sensor assembly of an energy storage device according to an embodiment of the present invention comprises: a temperature sensing substrate provided in a plate shape so as to be stacked on a battery cell and having an insertion groove on one side; a temperature sensor inserted into the insertion groove and mounted on the temperature sensing substrate to detect the temperature of the battery cell; a lead wire connected to the temperature sensor and having a connector at its end capable of connecting to an electronic device to transmit measurement data of the temperature sensor; and an adhesive tape that maintains the lead wire in a folded state on the temperature sensor assembly during the stacking operation of the temperature sensor assembly onto the battery cell. The adhesive tape has one or more perforations parallel to the folded portion of the lead wire to reduce the force required for the disassembly operation of unfolding the folded portion of the lead wire and detaching it toward the electronic device after the stacking operation of the temperature sensor assembly.

Description

Technology Field

[0001] The present invention relates to a temperature sensor assembly and a method for installing a temperature sensor assembly using the same. More specifically, the invention relates to a temperature sensor assembly that enables easy disassembly of a lead wire after stacking the temperature sensor assembly to a battery cell of an Energy Storage System (ESS), and a method for installing the assembly by stacking it to a battery cell of an Energy Storage System and connecting the lead wire to an electronic device. Background Technology

[0002] Recently, the demand for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) has been increasing as a solution to address issues such as air pollution and petroleum resource depletion associated with conventional gasoline vehicles. Rechargeable secondary batteries capable of repeated recharging are used as the power source for electric vehicles. Currently commercialized secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium-ion batteries. For secondary batteries used in medium-to-large devices such as electric vehicles, medium-to-large battery modules or battery packs, which consist of multiple battery cells electrically connected, are utilized. Since it is desirable for medium-to-large battery modules to be manufactured with the smallest possible size and weight, prismatic and pouch-type batteries, which can be stacked with high integration density and have a low weight-to-capacity ratio, are primarily used as battery cells in medium-to-large battery modules.

[0003] Meanwhile, if overvoltage, overcurrent, or overheating occurs in some battery cells within a battery module or battery pack, it may cause problems with safety and operational efficiency. Accordingly, voltage sensors, temperature sensors, etc., may be built into the battery module or battery pack, and the operating status of the battery cells can be checked in real time or at regular intervals through the voltage sensors or temperature sensors. In addition, for this purpose, electrical connection work between the temperature sensor and an electronic device (e.g., a battery management system) must be performed.

[0004] The connection between the temperature sensor and the electronic device is performed by stacking the temperature sensor assembly onto the battery cell and then connecting the lead wires connected to the temperature sensor assembly to the electronic device. The lead wires for transmitting temperature measurement data acquired by the temperature sensor assembly are designed to be sufficiently long to enable connection with the electronic device. Before connecting the lead wires of the temperature sensor assembly to the electronic device, the temperature sensor assembly is first stacked onto the battery cell. During this stacking process, due to the long length of the lead wires, parts of the lead wires may shake, which may interfere with the stacking robot's operation of stacking the temperature sensor assembly onto the battery cell of the energy storage device.

[0005] To prevent interference or hindrance to the stacking process caused by the lead wire shaking during the stacking of the temperature sensor assembly to the energy storage device due to the long length of the lead wire, a method may be applied in which the lead wire of the temperature sensor assembly is folded onto the temperature sensing substrate of the temperature sensor assembly and the folded portion of the lead wire is secured with adhesive tape. Accordingly, the lead wire is prevented from shaking during the stacking process, thereby enabling the stacking operation to be performed smoothly.

[0006] After the temperature sensor assembly is stacked onto the battery cell, the folded lead wire must be unfolded and detached toward the connection terminal of the electronic device to connect the connector of the temperature sensor assembly to the connection terminal of the electronic device. This process involves peeling off the adhesive tape that holds the lead wire in a folded state, and can be performed by having a worker apply force to pull the lead wire to detach it from the adhesive tape.

[0007] However, if the adhesive strength of the adhesive tape is excessively high, a large release force is required to unfold the folded portion of the lead wire. In particular, if the temperature sensing substrate of the temperature sensor assembly is made of a flexible PC (polycarbonate) material with a thin thickness of about 0.5 mm, deformation of the temperature sensing substrate is likely to occur if a force exceeding a certain level is applied to disassemble the lead wire. Consequently, during the process of peeling off the adhesive tape to disassemble the lead wire, problems may arise, such as bending of the temperature sensing substrate made of a flexible plate or connection failures caused by bending of the connector's connection area. Therefore, a new temperature sensor assembly and a method of installing the same are required that allow the stacking operation to be performed smoothly by fixing the folded portion of the lead wire with adhesive tape during the stacking operation, while also facilitating the disassembly of the lead wire after the stacking operation. The background technology described above should be understood as being intended to explain the background in which the present invention was derived, and does not imply technology known prior to the filing of the present invention. The problem to be solved

[0008] The present invention is intended to provide a temperature sensor assembly that facilitates the disassembly of lead wires after stacking the temperature sensor assembly to a battery cell of an energy storage device, and a method for stacking the same to a battery cell of an energy storage device and installing it by easily connecting the lead wires to an electronic device.

[0009] In addition, the present invention aims to provide a temperature sensor assembly and a method for installing the same, which can prevent bending of a temperature sensing substrate and reduce the process defect rate by adding a perforation line to an adhesive tape for fixing a lead wire in a folded state to reduce the detachment force of the adhesive tape.

[0010] In addition, the present invention aims to derive an optimal structure of a perforation line applied to an adhesive tape for fixing a lead wire in a folded state for easy disassembly of the lead wire, and to provide a temperature sensor assembly and a method for installing the same that can disassemble the lead wire while minimizing adhesive tape residue remaining on the lead wire after disassembly.

[0011] The technical problems to be solved by the embodiments of the present invention are not limited to those described above, and other technical problems can be inferred from the following embodiments. means of solving the problem

[0012] A temperature sensor assembly of an energy storage device according to an embodiment of the present invention is provided to detect the temperature of a battery cell while stacked on a battery cell of the energy storage device, and comprises: a temperature sensing substrate provided in a plate shape so as to be stacked on the battery cell and having an insertion groove on one side; a temperature sensor inserted into the insertion groove and mounted on the temperature sensing substrate to detect the temperature of the battery cell; a lead wire connected to the temperature sensor and having a connector at its end capable of connecting to an electronic device to transmit measurement data of the temperature sensor; and an adhesive tape that maintains the lead wire in a folded state on the temperature sensor assembly during the operation of stacking the temperature sensor assembly on the battery cell.

[0013] The adhesive tape is characterized by having one or more perforations parallel to the folded portion of the lead wire to reduce the force required for the disassembly operation of unfolding the folded portion of the lead wire and detaching it toward the electronic device after the stacking operation of the temperature sensor assembly.

[0014] A temperature sensor assembly of an energy storage device according to an embodiment of the present invention may further include: an adhesive tape for fixing a temperature sensor that is attached to cover at least a portion of the insertion groove on the front and rear surfaces of the temperature sensing substrate, respectively, to fix the temperature sensor within the insertion groove; and an adhesive tape for fixing a lead wire that fixes a portion of the lead wire extending from the temperature sensor toward the electronic device, excluding the folded portion, onto the temperature sensing substrate.

[0015] In one embodiment of the present invention, the adhesive tape may comprise: an adhesive tape body having adhesive force; a first cut line provided on the adhesive tape body parallel to the folded portion of the lead wire; and a second cut line provided on the adhesive tape body spaced apart from the first cut line and parallel to the folded portion of the lead wire. The first cut line and the second cut line may be spaced apart by an interval equal to the width of the folded portion of the lead wire.

[0016] In another embodiment of the present invention, the adhesive tape may comprise: an adhesive tape body having adhesive force; and a single cut line provided on the adhesive tape body parallel to a folded portion of the lead wire. The single cut line may be provided to extend along the center of the lead wire in the longitudinal direction of the lead wire.

[0017] In another embodiment of the present invention, the adhesive tape may comprise: an adhesive tape body having adhesive force, which is divided into a first area and a second area closer to the temperature sensor than the first area according to the distance from the temperature sensor based on the length direction of the lead wire; a third cut line provided in the first area of ​​the adhesive tape body where the distance from the temperature sensor is greater than the second area, positioned closer to the second side than the first side among the two sides of the lead wire, and formed along the outer side of the second side based on the center in the width direction of the lead wire; a fourth cut line provided in the first area of ​​the adhesive tape body, positioned closer to the first side than the second side among the two sides of the lead wire, and formed along the outer side of the first side based on the center in the width direction of the lead wire; and a fifth cut line provided in the second area of ​​the adhesive tape body where the distance from the temperature sensor is closer than the first area, and formed along the center of the lead wire.

[0018] The fifth cut line is connected to at least one of the third cut line and the fourth cut line between the first region and the second region, and can be arranged parallel to the folded portion along the center of the lead wire.

[0019] Additionally, according to an embodiment of the present invention, an energy storage device is provided comprising at least one battery cell; and a temperature sensor assembly stacked on the battery cell, wherein the temperature sensor assembly comprises a temperature sensor assembly of the energy storage device.

[0020] In addition, according to an embodiment of the present invention, a method for installing a temperature sensor assembly for detecting the temperature of a battery cell of an energy storage device is provided by stacking and installing the temperature sensor assembly on the battery cell. The method for installing a temperature sensor assembly according to an embodiment of the present invention comprises the steps of: preparing a temperature sensing substrate having a plate shape and having an insertion groove into which a temperature sensor can be inserted; preparing a temperature sensor connected to a lead wire having a connector provided at one end that can be connected to an electronic device; inserting and mounting the temperature sensor into the insertion groove of the temperature sensing substrate; attaching the lead wire to the temperature sensing substrate by means of an adhesive tape so as to maintain the lead wire in a folded state on the temperature sensing substrate; stacking the temperature sensor assembly on the battery cell while the lead wire is in a folded state; and, after the temperature sensor assembly is stacked on the battery cell, removing the adhesive tape to unfold the folded portion of the lead wire and detach it toward the electronic device.

[0021] The adhesive tape used to maintain the lead wire in a folded state is characterized by having one or more perforations parallel to the folded portion of the lead wire to reduce the force required when the adhesive tape is disassembled. Effects of the invention

[0022] According to an embodiment of the present invention, a temperature sensor assembly is provided that allows for easy disassembly of lead wires after stacking the temperature sensor assembly to a battery cell of an energy storage device, and a method for stacking the same to a battery cell of an energy storage device and installing it by easily connecting lead wires to an electronic device is provided.

[0023] In addition, according to an embodiment of the present invention, a perforation line is added to the adhesive tape for fixing the lead wire in a folded state to reduce the detachment force of the adhesive tape, thereby preventing bending of the temperature sensing substrate and reducing the process defect rate.

[0024] In addition, according to an embodiment of the present invention, by deriving an optimal structure of a perforation line applied to an adhesive tape for fixing a lead wire in a folded state, the lead wire can be easily disassembled, and the adhesive tape residue remaining on the lead wire after disassembly can be minimized. Brief explanation of the drawing

[0025] FIG. 1 is a drawing showing a temperature sensor assembly of an energy storage device according to an embodiment of the present invention. Figure 2 is an enlarged view of section 'A' of Figure 1. FIG. 3 is a drawing showing an energy storage device including a temperature sensor assembly according to an embodiment of the present invention. FIG. 4 is a diagram showing a temperature sensor assembly according to an embodiment of the present invention stacked on a battery cell of an energy storage device. FIGS. 5 to 8 are drawings for explaining a method of installing a temperature sensor assembly according to an embodiment of the present invention. FIG. 5 is a drawing showing a state in which a fixing adhesive tape for fixing a temperature sensor and a lead wire is attached to the back surface of a temperature sensing substrate according to an embodiment of the present invention. FIG. 6 is a drawing showing the state in which a temperature sensor and a lead wire are inserted into an insertion groove of a temperature sensing substrate according to an embodiment of the present invention, and then a fixing adhesive tape for fixing the temperature sensor and the lead wire is attached to the front surface of the temperature sensing substrate. FIG. 7 is a drawing showing a state in which a temperature sensor and a lead wire are inserted into an insertion groove of a temperature sensing substrate according to an embodiment of the present invention, and the lead wire is folded onto the temperature sensing substrate and fixed with adhesive tape. FIG. 8 is a diagram showing the process of disassembling a lead wire to connect a connector provided on the lead wire to a connection terminal of an electronic device after performing a stacking operation on a temperature sensing substrate in a folded state according to an embodiment of the present invention. FIGS. 9 to 12 are drawings showing the perforation line structure of an adhesive tape according to various embodiments of the present invention. FIG. 9 is a drawing showing the structure of a cut line of an adhesive tape according to the first embodiment of the present invention, showing an embodiment in which a double cut line is provided on the adhesive tape. FIG. 10 is a drawing showing the structure of a cut line of an adhesive tape according to a second embodiment of the present invention, showing an embodiment in which a single cut line is provided on the adhesive tape. FIG. 11 is a drawing showing the structure of a cut line of an adhesive tape according to a third embodiment of the present invention, showing an embodiment in which a double cut line and a single cut line are combined in the adhesive tape and the double cut line and the single cut line are connected. FIG. 12 is a drawing showing the structure of a cut line of an adhesive tape according to the fourth embodiment of the present invention, showing an embodiment in which a double cut line and a single cut line are combined in the adhesive tape and neither the cut line of the double cut line nor the single cut line is connected. Specific details for implementing the invention

[0026] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. It should be noted that the drawings are schematic and not drawn to scale. Relative dimensions and proportions of parts in the drawings are exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are merely illustrative and not limiting. Also, the same reference numerals are used to denote similar features for identical structures, elements, or parts appearing in two or more drawings.

[0027] The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various variations of the illustrations are expected. Accordingly, the embodiments are not limited to specific forms of the illustrated areas and include, for example, variations in form resulting from manufacturing. All technical and scientific terms used herein, unless otherwise defined, have the meaning generally understood by those skilled in the art to which the present invention pertains. All terms used herein are selected for the purpose of further clarifying the present invention and are not selected to limit the scope of rights according to the present invention.

[0028] Expressions used in this specification, such as "comprising," "comprising," and "having," should be understood as open-ended terms implying the possibility of including other embodiments, unless otherwise stated in the phrase or sentence containing such expressions. Singular expressions described in this specification may include a plural meaning unless otherwise stated, and this applies likewise to singular expressions described in the claims. Expressions used in this specification, such as "first," "second," etc., are used to distinguish multiple components from one another and do not limit the order or importance of said components.

[0029] As used in this specification, 'module' and 'part' refer to a unit that processes at least one function or operation, and may refer to hardware components such as software, an FPGA, or one or more processors. In describing embodiments of the present invention, if it is determined that a detailed description of related known functions or known configurations may unnecessarily obscure the essence of the present invention, such detailed description may be omitted.

[0030] FIG. 1 is a drawing showing a temperature sensor assembly of an energy storage device according to an embodiment of the present invention. FIG. 2 is a drawing showing an enlarged view of section 'A' of FIG. 1. FIG. 3 is a drawing showing an energy storage device including a temperature sensor assembly according to an embodiment of the present invention. FIG. 4 is a drawing showing stacking a temperature sensor assembly according to an embodiment of the present invention onto a battery cell of an energy storage device.

[0031] Referring to FIGS. 1 to 4, the temperature sensor assembly (100) of an energy storage device according to an embodiment of the present invention is provided to detect the temperature of a battery cell (10) while stacked on a battery cell (10) of an energy storage device, and may include a temperature sensing substrate (110), a temperature sensor (120), a lead wire (130), an adhesive tape (150), an adhesive tape for fixing the temperature sensor (162), and an adhesive tape for fixing the lead wire (163). The temperature sensor assembly (100) can be inserted between the battery cells (10) to measure the temperature at a specific location of the battery cell (10).

[0032] In the embodiment of FIG. 3, one temperature sensor assembly (100) is inserted into the battery cell stack, but depending on the application product or scale (size) of the battery cell stack, two or more temperature sensor assemblies (100) may be inserted into the battery cell stack. The temperature sensor assembly (100) may be inserted between two adjacent battery cells (10) to detect temperature, but it may also be implemented to detect temperature by stacking on the outermost battery cell.

[0033] The temperature sensing substrate (110) may be provided in a plate shape corresponding to the battery cell (10) so that it can be stacked on the battery cell (10). The battery cell (10) may be a battery cell of a battery pack or battery module, and may be, for example, a pouch-type battery cell, but is not necessarily limited thereto. When the temperature sensor assembly (100) is stacked on the battery cell (10), the temperature sensing substrate (110) is positioned parallel to one side of the battery cell (10) and can come into contact while covering one side of the battery cell (110).

[0034] The temperature sensing substrate (110) may have a width and length similar to one side of the battery cell (110). Accordingly, it is possible to prevent damage to the battery cell (10) or the temperature sensor assembly (100) by preventing a distance deviation between two adjacent battery cells (10) to which the temperature sensor assembly (100) is stacked, or by applying a large pressure to a specific part during swelling of the battery cell (10). In addition, if the temperature sensing substrate (110) is formed with substantially the same width and length as the battery cell (110), it is possible to prevent the temperature from being measured at a point deviating from the intended position due to the position of the temperature sensor assembly (100) fluctuating by gravity. Preferably, the temperature sensing substrate (110) may be designed to cover 70% or more, 80% or more, or 90% or more of one side of the battery cell (10).

[0035] The temperature sensing substrate (110) may be provided with an insertion groove (113) for mounting a temperature sensor (120) on one side. The insertion groove (113) may be formed to penetrate the temperature sensing substrate (110) with a shape corresponding to a part of the temperature sensor (120) and the lead wire (130). Alternatively, the insertion groove (113) may be formed as a recessed groove formed to a predetermined depth from the surface of the temperature sensing substrate (110) so as to accommodate the temperature sensor (120) and the lead wire (130) without completely penetrating the temperature sensing substrate (110). The temperature sensing substrate (110) may be formed with the same thickness as the temperature sensor (120). The temperature sensing substrate (110) may have a thickness of several hundred micrometers to several millimeters so as to facilitate insertion into a thin space.

[0036] The thickness of the temperature sensing substrate (110) can preferably be set to 0.3 mm to 0.7 mm, more preferably 0.4 mm to 0.6 mm. If the thickness of the temperature sensing substrate (110) is greater than 0.7 mm, the distance between two adjacent battery cells (10) may be widened, and accordingly, the total volume of the battery cell stack in which the battery cells (10) are stacked may increase. If the thickness of the temperature sensing substrate (110) is less than 0.3 mm, it may be difficult to mount the temperature sensor (120) on the temperature sensing substrate (110).

[0037] The temperature sensing substrate (110) may be designed to have a uniform thickness, but may also be designed to have a non-uniform thickness to accommodate volume changes of the battery cell (10) when the battery cell (10) swells. For example, the temperature sensing substrate (110) may be designed so that the thickness at the edges is greater than the thickness at the center.

[0038] The temperature sensing substrate (110) can be manufactured from a material having a rigidity that does not excessively deform due to pressure applied when the volume of the battery cell (10) changes, while not excessively pressurizing the battery cell (10). For example, the temperature sensing substrate (110) can be manufactured from polycarbonate (PC) or polypropylene (PP), but can also be manufactured from other materials having similar physical properties.

[0039] A temperature sensor (120) can be inserted into an insertion groove (113) of a temperature sensing substrate (110) and mounted on the temperature sensing substrate (110) to detect the temperature of the battery cell (10). When the temperature sensor assembly (100) is stacked on the battery cell (10), the temperature sensor (120) can measure the temperature of the battery cell (10) by attaching or being in close contact with one side of the battery cell (10). The temperature sensor (120) may be provided as a thermistor, for example, manufactured based on a metal oxide semiconductor and exhibiting electrical properties in which resistance changes according to temperature, but is not limited thereto.

[0040] A temperature sensor (120) may be inserted into an insertion groove (113) and mounted on a temperature sensing substrate (110) to measure the temperature at a measurement point (11) of a battery cell (10). The measurement point (11) of the battery cell (10) may be set as a location representing the temperature of the battery cell (10). For example, the measurement point (11) of the battery cell (10) may be set as a hot spot of the battery cell (10). The hot spot may be a location where the highest temperature occurs, which is relatively higher than other parts of the battery cell (10), excluding the electrode lead portion. The location of the hot spot may be a location closer to the center than to the edge with respect to the width direction of the battery cell (10). Additionally, the location of the hot spot may be a location closer to the edge than to the center with respect to the length direction of the battery cell (10). The location of the hot spot may be formed at a location spaced apart by a predetermined distance (for example, 5% to 20% of the battery cell length) from an electrode lead located on one side of the battery cell (10).

[0041] It is preferable that the temperature sensor (120) be provided as a film type with the same thickness as the temperature sensing substrate (110). The more similar the thickness of the temperature sensor (120) is to the thickness of the temperature sensing substrate (110), the more accurately the temperature measurement of the battery cell (110) by the temperature sensor (120) can be performed, and it is also possible to prevent the temperature sensor (120) from damaging the battery cell (10) or the temperature sensor (120) from being damaged by the battery cell (10) when the battery cell (10) swells.

[0042] A connecting member (124) may be provided in the temperature sensor (120). One end of the connecting member (124) may be connected to the temperature sensor body (122) of the temperature sensor (120), and the other end may be connected to a lead wire (130) connected to the temperature sensor body (122). The connecting member (124) may function to support the extension direction of the lead wire (130) by switching it based on the installation direction of the temperature sensor body (122). That is, the connecting member (124) may switch the direction of the lead wire (130) toward the connection terminal of the electronic device. The connecting member (124) may be composed of a molded or injection-molded product manufactured including a thermoplastic resin. Examples of thermoplastic resins used in the manufacture of the connecting member (124) include TPS, TPV, TPO, TPU, TPEE, etc.

[0043] In the illustrated example, considering the location of the measurement point (11) and the location of the electronic device, the length direction (long axis direction) of the temperature sensor body (122) and the extension direction of the lead wire (130) are configured to be perpendicular, and accordingly, the shape of the insertion groove (113) is also formed in an L-shape, but the angle between the length direction (long axis direction) of the temperature sensor body (122) and the extension direction of the lead wire (130) can be varied depending on the location of the measurement point (11) or the location of the electronic device, etc.

[0044] The lead wire (130) may be electrically connected to the temperature sensor (120) to transmit measurement data detected and acquired by the temperature sensor (120) to an electronic device (not shown). The lead wire (130) may also perform the function of transmitting power provided by the electronic device to the temperature sensor (120). The lead wire (130) may be composed of a shaped wire. The lead wire (130) may, for example, be a wire made of cross-linked polyethylene (XLPE) material that can be used up to 150°C, but is not limited thereto and may be made of various materials such as copper, aluminum, nickel-chromium alloy. The lead wire (130) may be used without special limitation as long as it is made of a conductive material capable of transmitting data acquired by the temperature sensor (120), power, signals, etc. of the electronic device.

[0045] A connector (140) capable of connecting to an electronic device, such as a Battery Management System (BMS), may be provided at the end of the lead wire (130). The electronic device connected to the connector (140) may be an electronic device other than a BMS. The connector (140) may be provided in a specification that allows it to be connected to a connection terminal provided on the electronic device. The lead wire (130) may be provided with a sufficiently long length so that the connector (140) provided at its end can be connected to the electronic device.

[0046] The connection between the temperature sensor assembly (100) and the electronic device is performed after the operation of stacking the temperature sensor assembly (100) onto the battery cell (10). The lead wire (130) is designed to be long for connection with the electronic device, and accordingly, a portion of the lead wire (130) protrudes outside the temperature sensing substrate (110). As a result, the lead wire (130) extends outside the temperature sensing substrate (110) and, as it shakes, may interfere with the stacking operation robot's operation of stacking the temperature sensor assembly (100) onto the battery cell (10).

[0047] In order to prevent the lead wire (130) from shaking and causing interference with the stacking operation, the adhesive tape (150) maintains the lead wire (130) in a folded state on the temperature sensor assembly (100) during the stacking operation of the temperature sensor assembly (100) to the battery cell (10). That is, after folding the lead wire (130) toward the temperature sensing substrate (110) one or more times, the adhesive tape (150) is attached to the folded part of the lead wire (130) and the temperature sensing substrate (110), thereby preventing the lead wire (130) from shaking during the stacking operation and allowing the stacking operation to be performed smoothly.

[0048] After the temperature sensor assembly (100) is stacked on the battery cell (10), the folded lead wire (130) must be unfolded and moved toward the electronic device to connect the connector (140) to the connector of the electronic device. If the adhesive strength of the adhesive tape (150) is excessively strong, a large amount of force is required to unfold the folded part of the lead wire (130). Accordingly, during the process of removing the adhesive tape (150) and dismantling the lead wire (130), problems may occur such as bending of the temperature sensing board (110), which is made of a flexible plate, or a connection failure occurring as the connection part of the connector (140) bends.

[0049] Accordingly, in an embodiment of the present invention, the adhesive tape (150) is provided with one or more perforations parallel to the folded portion of the lead wire (130) to reduce the force required for the dismantling operation of unfolding the folded portion of the lead wire (130) and detaching it toward the electronic device after the stacking operation for the temperature sensor assembly (100).

[0050] The adhesive tape (162) for fixing the temperature sensor is attached to both sides of the temperature sensing substrate (110) to cover at least a portion of the insertion groove (113) so as to fix the temperature sensor (120) within the insertion groove (113). The adhesive tape (163) for fixing the lead wire can fix the portion of the lead wire (130) extending from the temperature sensor (120) toward the electronic device, excluding the folded portion, onto the temperature sensing substrate (110).

[0051] FIGS. 5 to 8 are drawings illustrating a method for installing a temperature sensor assembly according to an embodiment of the present invention. FIG. 5 is a drawing showing a state in which a fixing adhesive tape for fixing a temperature sensor and a lead wire is attached to the rear surface of a temperature sensing substrate according to an embodiment of the present invention. FIG. 6 is a drawing showing a state in which a temperature sensor and a lead wire are inserted into an insertion groove of a temperature sensing substrate according to an embodiment of the present invention, and a fixing adhesive tape for fixing a temperature sensor and a lead wire is attached to the front surface of the temperature sensing substrate. FIG. 7 is a drawing showing a state in which a lead wire is folded on a temperature sensing substrate and fixed with an adhesive tape while the temperature sensor and a lead wire are inserted into an insertion groove of a temperature sensing substrate according to an embodiment of the present invention. FIG. 8 is a drawing showing the process of disassembling a lead wire to connect a connector provided on the lead wire to a connection terminal of an electronic device after performing a stacking operation with the lead wire folded on the temperature sensing substrate according to an embodiment of the present invention.

[0052] Hereinafter, a method for installing a temperature sensor assembly according to an embodiment of the present invention will be described with reference to FIGS. 5 to 8. First, a temperature sensing substrate (110) having a plate shape and having an insertion groove (113; 113a, 113b) into which a temperature sensor (120) can be inserted is prepared, and a fixing adhesive tape (161; 161a, 161b) is attached to the portion of the rear surface (112) of the temperature sensing substrate (110) where the insertion groove (113) is formed (see FIG. 5).

[0053] The insertion groove (113) may include a temperature sensor insertion groove (113a) into which a temperature sensor (120) is inserted, and a lead wire insertion groove (113b) into which a lead wire (130) is inserted. A fixing adhesive tape (161) attached to the rear surface (112) of the temperature sensing substrate (110) may include a temperature sensor fixing adhesive tape (161a) attached to cover the temperature sensor insertion groove (113a) for fixing the temperature sensor (120), and a lead wire fixing adhesive tape (161b) attached to cover the lead wire insertion groove (113b) for fixing the lead wire (130). The fixing adhesive tape (161; 161a, 161b) may be mechanically attached by an adhesive tape attachment device or may be manually attached by a worker.

[0054] Next, a temperature sensor (120) is prepared to which a lead wire (130) is connected, the lead wire (130) having a connector (140) at the end capable of connecting to an electronic device is connected, and the temperature sensor (120) and the lead wire (130) are inserted into the insertion groove (113) of the temperature sensing board (110) and mounted. With the temperature sensor (120) and the lead wire (130) inserted into the insertion groove (113) of the temperature sensing board (110), an adhesive tape (162) for fixing the temperature sensor and an adhesive tape (163) for fixing the lead wire are attached to the insertion groove (113) on the front surface (111) of the temperature sensing board (110) (see FIG. 6). Accordingly, the temperature sensor (120) and the lead wire (130) can be fixed within the insertion groove (113) by fixing adhesive tapes (161, 162, 163) respectively attached to the front surface (111) and the rear surface (112) of the temperature sensing substrate (110). The fixing adhesive tapes (162, 163) may be mechanically attached by an adhesive tape attachment device or manually attached by a worker.

[0055] Next, to prevent the lead wire (130) from swaying and hanging from the temperature sensing substrate (110) during the stacking operation, the lead wire (130) is folded one or more times on the temperature sensing substrate (110), and then an adhesive tape (150) having a perforation line (151) is attached to the folded part of the lead wire (130) and the temperature sensing substrate (110) (see FIG. 7). Accordingly, the lead wire (130) is maintained in a folded state on the temperature sensing substrate (110) by the adhesive tape (150) during the stacking operation. The adhesive tape (150) may be mechanically attached by an adhesive tape attachment device or manually attached by a worker.

[0056] When the temperature sensor assembly (100) is stacked on the battery cell (10), the adhesive tape (150) is removed to unfold the lead wire (130) and detach / remove it in order to connect the connector (140) provided at the end of the lead wire (130) to the electronic device side. At this time, the adhesive tape (150) has one or more perforations (151) parallel to the folded part of the lead wire (130), so that the adhesive tape (150) is cut along the perforations (151), and accordingly, the force required when removing the adhesive tape (150) can be significantly reduced.

[0057] When stacking the temperature sensor assembly (100), only enough adhesive force is required to maintain the lead wire (130) in a folded state, so even if an adhesive tape (150) with a perforation line (151) is used, it is sufficient to maintain the lead wire (130) in a folded state. After stacking, there is no need to apply excessive force to remove the adhesive tape (150), so there is no risk of bending of the temperature sensing board (110) or damage to the connector, and since there is no need to remove the adhesive tape (150) with great care to prevent bending of the temperature sensing board (110) or damage to the connector, the operation of detaching / removing the lead wire (130) can be performed quickly and efficiently.

[0058] FIGS. 9 to 12 are drawings illustrating the perforation line structure of an adhesive tape according to various embodiments of the present invention. FIG. 9 is a drawing illustrating the perforation line structure of an adhesive tape according to the first embodiment of the present invention, showing an embodiment in which a plurality (preferably two) of perforations are provided on the adhesive tape. FIG. 10 is a drawing illustrating the perforation line structure of an adhesive tape according to the second embodiment of the present invention, showing an embodiment in which a single perforation line is provided on the adhesive tape. FIG. 11 is a drawing illustrating the perforation line structure of an adhesive tape according to the third embodiment of the present invention, showing an embodiment in which a double perforation line and a single perforation line are combined on the adhesive tape and the double perforation line and the single perforation line are connected. FIG. 12 is a drawing illustrating the perforation line structure of an adhesive tape according to the fourth embodiment of the present invention, showing an embodiment in which a double perforation line and a single perforation line are combined on the adhesive tape and neither of the double perforations is connected to the single perforation line.

[0059] < First Example >

[0060] First, referring to FIG. 9, an adhesive tape (150) according to a first embodiment of the present invention may include an adhesive tape body (150c) having adhesive force, a first cut line (151) provided parallel to the folded portion of a lead wire (130) on the adhesive tape body (150c), and a second cut line (152) provided parallel to the folded portion of a lead wire (130) on the adhesive tape body (150c) spaced apart from the first cut line (151). The first cut line (151) and the second cut line (152) may be spaced apart at a distance equal to the width (W1) of the folded portion of the lead wire (130), or at a slightly larger distance (W2) (preferably, at a distance less than or equal to twice the width (W1) of the folded portion of the lead wire (130). According to the adhesive tape (150) according to the first embodiment illustrated in FIG. 9, the lead wire (130) is disassembled as the adhesive tape (150) is cut along the first cut line (151) and the second cut line (152), so the lead wire (130) can be removed with less force.

[0061] < 2nd Example >

[0062] Referring to FIG. 10, an adhesive tape (150) according to a second embodiment of the present invention may include an adhesive tape body (150c) having adhesive force and a single cut line (156) provided parallel to a folded portion of a lead wire (130) on the adhesive tape body (150c). The single cut line (156) may be provided to extend along the center of the lead wire (130) in the longitudinal direction of the lead wire (130). According to the second embodiment illustrated in FIG. 10, since the lead wire (130) is disassembled as the adhesive tape (150) is cut along the single cut line (156), it is possible to prevent a portion of the adhesive tape (150) from remaining attached to the lead wire (130) during the process of detaching the lead wire (130).

[0063] < 3rd Example >

[0064] Referring to FIG. 11, an adhesive tape (150) according to a third embodiment of the present invention may include an adhesive tape body (150c) having adhesive force, a third cut line (153) and a fourth cut line (154) provided in a first region (150b) of the adhesive tape body (150c) that is far from the temperature sensor (120) with respect to the length direction of the lead wire (130), and a fifth cut line (155) provided in a second region (150a) of the adhesive tape body (150c) that is closer to the temperature sensor (120) than the first region (150b). In the third embodiment of FIG. 11, the third to fifth cut lines (153, 154, 155) may be provided in a roughly 'Y' shape in the area between the first region (150b) and the second region (150a).

[0065] The third cut line (153) is formed closer to the second side (132) than to the first side (131) of the two sides (131, 132) of the lead wire (130) and can extend along the second side (132). The fourth cut line (154) is formed closer to the first side (131) than to the second side (132) of the two sides (131, 132) of the lead wire (130) and can extend along the first side (131). The fifth cut line (155) can be connected to at least one of the third cut line (153) and the fourth cut line (154) between the first area (150b) and the second area (150a). The fifth cut line (155) can be formed along the center of the lead wire (130) parallel to the folded portion of the lead wire (130).

[0066] < 4th Example >

[0067] The adhesive tape (150) according to the fourth embodiment of the present invention is identical to the third embodiment in that it has a structure in which the third and fourth cut lines (153, 154) corresponding to double cut lines and the fifth cut line (155) corresponding to a single cut line are combined. In the fourth embodiment of the present invention, the fifth cut line (155) of the adhesive tape (150) is connected only to the third cut line (153) and is not connected to the fourth cut line (154), which is different from the third embodiment. That is, in the case of the third embodiment shown in FIG. 11, the fifth cut line (155) is connected to the third cut line (153) and the fourth cut line (154), respectively, whereas in the case of the fourth embodiment shown in FIG. 12, the fifth cut line (155) is connected only to one of the third cut lines (153) among the double cut lines and is not connected to the other fourth cut line (154), which is different. In the fourth embodiment of FIG. 12, the third cut line (153) and the fifth cut line (155) can be connected in a diagonal direction (a direction inclined to both adjacent sides of the temperature sensing substrate) in the area between the first region (150b) and the second region (150a). According to the fourth embodiment of FIG. 12, the third cut line (153) and the fourth cut line (154) are cut in the first region (150b), and the lead wire (130) can be detached with less force, which is the same as in the third embodiment.

[0068] In addition, in the case of the fourth embodiment of FIG. 12, the lead wire (130) is detached by cutting along a single fifth cut line (155) that is connected only to the third cut line (153) near the second region (150a), so that the lead wire (130) can be cleanly disassembled without any part of the adhesive tape (150) remaining on the lead wire (130).

[0069] In the case of the third embodiment of FIG. 11 described above, even if a portion of the adhesive tape (150) remains on the lead wire (130) after the lead wire (130) is disassembled, only the portion of the adhesive tape on the first area (150b) side remains, so the size of the adhesive tape that remains attached to the lead wire (130) can be reduced.

[0070] As described above, according to the third and fourth embodiments of FIGS. 11 and FIGS. 12, the detachment force required for detaching / disassembling the lead wire (130) is reduced by a cut line structure in which a double cut line (153, 154) and a single cut line (155) are combined, thereby making it easier to detach / disassemble the lead wire (130), and preventing or minimizing any residue of the adhesive tape (150) remaining on the folded part of the lead wire (130) when the folded part of the lead wire (130) is unfolded.

[0071] That is, during the process of unfolding the folded part of the lead wire (130), the dismantling of the lead wire (130) can be smoothly initiated as two third and fourth cutting lines (153, 154) are cut, and after the two third and fourth cutting lines (153, 154) are cut, the lead wire (130) is dismantled by cutting along one fifth cutting line (155), thereby preventing any residue of the adhesive tape (150) from remaining on the folded part of the lead wire (130).

[0072] Next, experimental results for verifying the performance and effects of the temperature sensor assembly installation method according to an embodiment of the present invention will be described. Table 1 shows the test results for measuring the lead wire detachment force when an adhesive tape without a perforation line is applied, and the test results for measuring the lead wire detachment force when an adhesive tape having a double perforation line is applied.

[0073] Test number < Comparative Example > Separation force test measurement (Kgf) when applying adhesive tape without perforations < Example 1 of the present invention > Measurement of detachment force test value (Kgf) when applying adhesive tape having a double perforation line 1 1.76 1.16 2 1.97 1.08 3 1.94 1.02 4 1.79 1.12 5 1.95 1.10 medium 1.882 1.096 maximum value 1.97 1.16 minimum value 1.76 1.02

[0074] As shown in Table 1, the test results indicate that when using an adhesive tape with a double perforation line according to the first embodiment of the present invention, the lead wire detachment force was measured to be 1.0 kgf. This is approximately half the force required to detach the lead wire compared to the lead wire detachment force of 1.97 kgf when using an adhesive tape without a perforation line. Furthermore, when using an adhesive tape without a perforation line, bending deformation occurred in the temperature sensing substrate during the lead wire detachment process; however, when using an adhesive tape with a double perforation line according to the first embodiment of the present invention, no deformation of the temperature sensing substrate occurred during the lead wire detachment process.

[0075] As described above, according to an embodiment of the present invention, the operation of disassembling the lead wire after stacking the temperature sensor assembly onto the battery cell of an energy storage device can be easily performed, and the lead wire can be disassembled while minimizing the increase in costs associated with the installation of the temperature sensor assembly. Furthermore, according to an embodiment of the present invention, by adding a perforation line to the adhesive tape for fixing the lead wire in a folded state, the detachment force of the adhesive tape is reduced, thereby preventing bending of the temperature sensing substrate and reducing the process defect rate. In addition, by deriving an optimal structure for the perforation line applied to the adhesive tape for fixing the lead wire in a folded state, the lead wire can be easily disassembled, and the adhesive tape residue remaining on the lead wire after disassembling can be minimized.

[0076] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without altering its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive, and the scope of the present invention is defined by the claims set forth below. Furthermore, all modifications or variations derived from the meaning and scope of the claims and their equivalents should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0077] 10 : Battery cell 100 : Temperature sensor assembly 110: Temperature sensing board 113 : Insertion slot 120: Temperature sensor 130 : Lead wire 140 : Connector 150 : Adhesive tape 150c: Adhesive tape body 151 : 1st cut line 152 : 2nd cut line 153 : 3rd cut line 154 : 4th cut line 155 : 5th cut line 156 : Single cut line 161 : Fixing adhesive tape 162 : Adhesive tape for fixing temperature sensors 163: Adhesive tape for securing lead wires

Claims

Claim 1 A temperature sensor assembly for an energy storage device configured to detect the temperature of a battery cell while stacked on the battery cell, comprising: a temperature sensing substrate provided in a plate shape so as to be stacked on the battery cell and having an insertion groove on one side; a temperature sensor mounted on the temperature sensing substrate and inserted into the insertion groove to detect the temperature of the battery cell; a lead wire connected to the temperature sensor and having a connector at its end capable of connecting to an electronic device to transmit measurement data of the temperature sensor; and an adhesive tape that maintains the lead wire in a folded state on the temperature sensor assembly during the stacking operation of the temperature sensor assembly on the battery cell; wherein the adhesive tape is characterized by having one or more perforations parallel to the folded portion of the lead wire to reduce the force required for a dismantling operation to unfold the folded portion of the lead wire and detach it toward the electronic device after the stacking operation of the temperature sensor assembly. Claim 2 A temperature sensor assembly of an energy storage device according to claim 1, further comprising: an adhesive tape for fixing a temperature sensor attached to cover at least a portion of the insertion groove on the front and rear surfaces of the temperature sensing substrate, respectively, to fix the temperature sensor within the insertion groove; and an adhesive tape for fixing a lead wire extending from the temperature sensor toward the electronic device, excluding the folded portion, to fix the portion thereof onto the temperature sensing substrate. Claim 3 A temperature sensor assembly of an energy storage device according to claim 1, wherein the adhesive tape comprises: an adhesive tape body having adhesive strength; a first cut line provided on the adhesive tape body parallel to a folded portion of the lead wire; and a second cut line provided on the adhesive tape body spaced apart from the first cut line and parallel to a folded portion of the lead wire. Claim 4 A temperature sensor assembly of an energy storage device according to claim 3, wherein the first cut line and the second cut line are spaced apart by a distance equal to the width of the folded portion of the lead wire. Claim 5 A temperature sensor assembly of an energy storage device according to claim 1, wherein the adhesive tape comprises: an adhesive tape body having adhesive strength; and a single cut line provided on the adhesive tape body parallel to a folded portion of the lead wire; wherein the single cut line is provided to extend along the center of the lead wire in the longitudinal direction of the lead wire. Claim 6 In claim 1, the adhesive tape comprises: an adhesive tape body having adhesive force, which is divided into a first region and a second region, which is closer to the temperature sensor than the first region, based on the distance from the temperature sensor with respect to the length direction of the lead wire; a third cut line provided in the first region of the adhesive tape body, which is further from the temperature sensor than the second region, positioned closer to the second side than the first side among the two sides of the lead wire, and formed along the outer side of the second side with respect to the center in the width direction of the lead wire; and a fourth cut line provided in the first region of the adhesive tape body, positioned closer to the first side than the second side among the two sides of the lead wire, and formed along the outer side of the first side with respect to the center in the width direction of the lead wire. A temperature sensor assembly of an energy storage device, comprising: a fifth cut line formed along the center of the lead wire, provided in a second area of ​​the adhesive tape body that is closer to the temperature sensor than the first area; wherein the fifth cut line is connected to at least one of the third cut line and the fourth cut line between the first area and the second area, and is provided parallel to the folded portion along the center of the lead wire. Claim 7 An energy storage device comprising at least one battery cell; and a temperature sensor assembly stacked on the battery cell, wherein the temperature sensor assembly comprises a temperature sensor assembly of an energy storage device according to any one of claims 1 to 6. Claim 8 A method for installing a temperature sensor assembly for detecting the temperature of a battery cell of an energy storage device by stacking the temperature sensor assembly on the battery cell, comprising the steps of: preparing a temperature sensing substrate having a plate shape and having an insertion groove into which a temperature sensor can be inserted; preparing a temperature sensor having a lead wire connected thereto, the lead wire having a connector provided at one end for connecting to an electronic device; inserting and mounting the temperature sensor into the insertion groove of the temperature sensing substrate; attaching the lead wire to the temperature sensing substrate by means of an adhesive tape so as to maintain the lead wire in a folded state on the temperature sensing substrate; and stacking the temperature sensor assembly on the battery cell while the lead wire is in a folded state. A method for installing a temperature sensor assembly of an energy storage device, comprising the step of stacking the temperature sensor assembly on the battery cell, then disassembling the adhesive tape to unfold the folded portion of the lead wire and detach it toward the electronic device; wherein the adhesive tape is characterized by having one or more perforations parallel to the folded portion of the lead wire to reduce the force required when disassembling the adhesive tape. Claim 9 A method for installing a temperature sensor assembly of an energy storage device according to claim 8, wherein the adhesive tape comprises: an adhesive tape body having adhesive strength; a first cut line provided on the adhesive tape body parallel to a folded portion of the lead wire; and a second cut line provided on the adhesive tape body spaced apart from the first cut line and parallel to a folded portion of the lead wire. Claim 10 A method for installing a temperature sensor assembly of an energy storage device according to claim 8, wherein the adhesive tape comprises: an adhesive tape body having adhesive strength; and a single cut line provided on the adhesive tape body parallel to a folded portion of the lead wire; wherein the single cut line is provided to extend along the center of the lead wire in the longitudinal direction of the lead wire. Claim 11 In claim 8, the adhesive tape comprises: an adhesive tape body having adhesive force, which is divided into a first region and a second region, which is closer to the temperature sensor than the first region, based on the distance from the temperature sensor with respect to the length direction of the lead wire; a third cut line provided in the first region of the adhesive tape body, which is further from the temperature sensor than the second region, positioned closer to the second side than the first side among the two sides of the lead wire, and formed along the outer side of the second side with respect to the center in the width direction of the lead wire; and a fourth cut line provided in the first region of the adhesive tape body, positioned closer to the first side than the second side among the two sides of the lead wire, and formed along the outer side of the first side with respect to the center in the width direction of the lead wire. A method for installing a temperature sensor assembly of an energy storage device, comprising: a fifth cut line formed along the center of the lead wire, provided in a second area of ​​the adhesive tape body where the distance from the temperature sensor is closer than that of the first area; wherein the fifth cut line is connected to at least one of the third cut line and the fourth cut line between the first area and the second area, and is provided parallel to the folded portion along the center of the lead wire.

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