Temperature measuring device for battery cells and method thereof

Abstract

A temperature measuring device includes a gathering section that gathers electromagnetic waves radiated from at least one battery cell in at least a portion of one face of the at least one battery cell, a light receiving section that receives the gathered electromagnetic waves, and a control section that measures a temperature of at least a portion of the one face of the at least one battery cell based on the received electromagnetic waves.

Description

Technical Field

[0001] This invention relates to a battery temperature measuring device and method for battery cells, and more specifically, to a temperature measuring device and method for measuring temperature by acquiring the temperature spectrum of a plurality of battery cells included in a battery for electric vehicles. Background Technology

[0002] Electric vehicle batteries typically have a structure consisting of multiple battery cells. To prevent battery fires and ensure the safety of the electric vehicle, it is necessary to monitor the temperature of these multiple battery cells.

[0003] However, monitoring the temperature of each battery cell by placing temperature sensors in multiple battery cells is very uneconomical in terms of cost.

[0004] In addition, while monitoring the temperature of a portion of the battery cells by placing temperature sensors in a portion of the multiple battery cells may be cost-effective, there is a problem that the fire risk of the unmonitored portion of the battery cells may increase.

[0005] Therefore, the necessity of effectively measuring the temperature of multiple battery cells was proposed. Summary of the Invention

[0006] The problem the invention aims to solve

[0007] The purpose of this invention is to provide a temperature measuring device that can determine the maximum or minimum temperature of at least a portion of a battery cell based on electromagnetic waves with a fixed wavelength radiated by thermal energy generated in at least a portion of a battery cell, thereby distinguishing whether the battery cell maintains a temperature below a reference value.

[0008] The purpose of this invention is to provide a temperature measuring device that can use a thin light guide plate to concentrate electromagnetic waves radiated from at least one battery cell, thereby occupying less space for receiving electromagnetic waves radiated from at least a portion of the battery cell.

[0009] The present invention aims to provide a temperature measuring device that utilizes a focusing structure with a wide image angle to focus electromagnetic waves radiated from at least one battery cell, thereby occupying less space for receiving electromagnetic waves radiated from at least a portion of the battery cell.

[0010] means for solving problems

[0011] The temperature measuring device according to an embodiment of the present invention includes: a focusing unit located in at least a portion of one side of at least one battery cell, which focuses electromagnetic waves radiated from at least one battery cell; a light receiving unit that receives the focused electromagnetic waves; and a control unit that measures the temperature of at least a portion of one side of the at least one battery cell based on the received electromagnetic waves.

[0012] The temperature measuring device of this invention includes a control unit, which acquires temperature spectrum information based on received electromagnetic waves and measures the temperature of at least a portion of one side of at least one battery cell based on the temperature spectrum information.

[0013] The temperature measuring device of this invention includes a focusing section, into which electromagnetic waves radiated from at least one battery cell are injected, and the focusing section changes the path of the injected electromagnetic waves so that they are directed toward a light-receiving section.

[0014] The temperature measuring device of this invention includes a focusing section, which includes a reflecting member disposed on a surface opposite to the surface into which the electromagnetic wave is incident, for reflecting or diffusing the electromagnetic wave.

[0015] The temperature measuring device of this invention includes a light-receiving part, which includes at least one light-receiving sensor disposed on one side of a light guide plate for detecting the infrared region of electromagnetic waves.

[0016] The temperature measuring device of this invention includes a light-receiving part, which includes a plurality of light-receiving sensors arranged at predetermined intervals on one side of a light guide plate.

[0017] The temperature measuring device of this invention includes a focusing section, which further includes a Fresnel lens located closer to at least one battery cell than the light guide plate, for concentrating electromagnetic waves emitted from at least one battery cell.

[0018] The temperature measuring device of this invention includes a Fresnel lens, characterized in that the lateral or longitudinal length of the Fresnel lens is greater than that of the light guide plate.

[0019] The temperature measuring device of this invention includes a gathering section, which has a shape in which the width gradually decreases from the side opposite to the side where the light-receiving section is disposed toward the side where the light-receiving section is disposed.

[0020] The temperature measuring device of this invention includes a light-receiving part, which includes a light-receiving sensor disposed on the side of the reduced width of the gathering part, for detecting the infrared region of the electromagnetic wave.

[0021] The temperature measuring device of this invention includes a control unit that acquires intensity information based on wavelength based on temperature spectrum information, and, based on the intensity information based on wavelength, when a wavelength intensity above a predetermined intensity is detected below a predetermined wavelength, distinguishes that at least a portion of a region of at least one battery cell is heating at a temperature above a reference value.

[0022] The temperature measuring device of this invention includes: a focusing section, comprising a Fresnel lens adjacent to at least one battery cell for concentrating electromagnetic waves emitted from at least one battery cell; and a light-receiving section, comprising at least one light-receiving sensor located in the direction forming the focal point of the Fresnel lens.

[0023] The temperature measuring device according to an embodiment of the present invention includes: a focusing section disposed spaced apart from at least one side of at least one battery cell, which focuses electromagnetic waves radiated from at least one battery cell; a light receiving section that receives the focused electromagnetic waves; and a control section that measures the temperature of at least a portion of one side of at least one battery cell based on the received electromagnetic waves.

[0024] In the temperature measuring device of this invention, at least one battery cell includes a plurality of battery cells.

[0025] The temperature measuring device of this invention includes a focusing section, which includes a focusing lens for focusing electromagnetic waves emitted from at least one battery cell.

[0026] The temperature measuring device of this invention includes a cylindrical focusing lens, which has a first opening at the top and a second opening at the bottom.

[0027] The temperature measuring device of this invention includes a focusing lens, which has an inclined portion having an inclined surface that is recessed inward from a first opening to a second opening.

[0028] The temperature measuring device of this invention includes a focusing lens, the focusing lens including an inclined portion, the inclined portion including a coating portion on the surface of which a coating having a specified reflectivity is formed.

[0029] In the temperature measuring device of this embodiment, the diameter of the first opening is larger than the diameter of the second opening, and the first opening includes a focusing lens configured to face at least one battery cell.

[0030] The temperature measuring device of this invention includes a light-receiving part, which includes a light-receiving sensor disposed in a second opening for receiving electromagnetic waves gathered by a focusing part.

[0031] The temperature measuring device of this invention includes a light-receiving sensor having a receiving range that is smaller than the diameter of a first opening and larger than the diameter of a second opening.

[0032] Invention Effects

[0033] The temperature measuring device of one embodiment of the present invention is based on electromagnetic waves with a fixed wavelength radiated by thermal energy generated in at least a portion of a battery cell to determine the maximum or minimum temperature of at least a portion of the battery cell, thereby being able to distinguish whether the battery cell maintains a temperature below a reference value.

[0034] According to one embodiment of the present invention, a temperature measuring device is provided that can use a thin light guide plate to concentrate electromagnetic waves radiated from at least one battery cell, thereby occupying less space for receiving electromagnetic waves radiated from at least a portion of the battery cell.

[0035] One embodiment of the temperature measuring device of the present invention utilizes a focusing structure with a wide image angle to focus electromagnetic waves radiated from at least one battery cell, thereby occupying less space for receiving electromagnetic waves radiated from at least a portion of the battery cell. Attached Figure Description

[0036] Figure 1 This is a diagram showing an existing conventional backlight unit.

[0037] Figure 2 This is a block diagram of a temperature measuring device according to an embodiment of the present invention.

[0038] Figure 3 This is a diagram illustrating a temperature measuring device according to an embodiment of the present invention.

[0039] Figure 4 This is an exploded perspective view showing a temperature measuring device according to an embodiment of the present invention.

[0040] Figure 5 This is a top view showing a temperature measuring device according to an embodiment of the present invention.

[0041] Figures 6 to 8 This is a diagram illustrating a temperature measurement method according to an embodiment of the present invention.

[0042] Figure 9 This is a diagram illustrating a temperature measuring device according to an embodiment of the present invention.

[0043] Figure 10 This is a diagram illustrating a temperature measuring device according to an embodiment of the present invention.

[0044] Figure 11 This is a diagram illustrating the aggregation section of an embodiment of the present invention.

[0045] Figure 12 This is a diagram illustrating the aggregation section of an embodiment of the present invention.

[0046] Figure 13 This is a diagram illustrating a temperature measuring device according to an embodiment of the present invention.

[0047] Figure 14 A diagram illustrating a temperature measuring device configured in a battery cell according to an embodiment of the present invention.

[0048] Figure 15 This is a diagram illustrating the temperature distribution of at least one battery cell according to an embodiment of the present invention.

[0049] Figure 16 This is a diagram illustrating a method for obtaining temperature spectrum information according to an embodiment of the present invention.

[0050] Figure 17 This is a diagram used to illustrate the intensity information of the wavelength according to an embodiment of the present invention. Detailed Implementation

[0051] Hereinafter, embodiments associated with the present invention will be described in more detail with reference to the accompanying drawings. The suffixes “module” and “part” used in the following description are merely for ease of writing and do not inherently distinguish one another.

[0052] Figure 1 This is a diagram showing an existing conventional backlight unit.

[0053] The backlight unit 100 is a device that artificially provides light to realize the picture because the LCD in an LCD TV cannot emit light on its own.

[0054] The backlight unit 100 may include a light source section 110 as a light source for emitting light. The light source section 110 may include a cold cathode fluorescent lamp (CCFL) or a light-emitting diode (LED). The light source section 110 may be located at the edge of the backlight unit 100, disposed adjacent to the side of the light guide plate 130 (described later), and may emit light toward the light guide plate 130.

[0055] Additionally, the backlight unit 100 may include a light source cover 120. The light source cover 120 may be configured to surround the light source section 110.

[0056] Additionally, the backlight unit 100 may include a light guide plate 130. The light guide plate 130 can change the path of light generated from the light source unit 110, causing it to exit to other sides. The light guide plate 130 can make the light incident from the light source unit 110 evenly distributed throughout the entire area. Furthermore, the light guide plate 130 may be made of a light-transmitting material with a constant refractive index.

[0057] Additionally, the backlight unit 100 may include a reflective member 140. The reflective member 140, as a component capable of reducing light loss from the light source unit 110, may be configured as a film, but is not limited thereto. Furthermore, the reflective member 140 may include an optical pattern section 141. The optical pattern section 141 can diffuse or reflect light from the light source unit 110 to prevent light concentration, thereby preventing light leakage, bright lines, or dark lines. Patterns performing light reflection, light diffusion, light scattering, or light blocking may be formed in the optical pattern section 141.

[0058] Additionally, the backlight unit 100 may include a diffuser 150. The diffuser 150 can scatter the light emitted from the light guide plate 130 again, so as to enable uniform illumination.

[0059] Additionally, the backlight unit 100 may include a prism sheet 160. The prism sheet 160, acting as a sheet to improve light efficiency, can convert side light into front light and concentrate light that diffuses in all directions. Therefore, the prism sheet 160 can concentrate the emitted light.

[0060] Additionally, the backlight unit 100 may include a protective film 170. The protective film 170 can protect the reflective member 140, the diffuser 150, or the prism sheet 160.

[0061] on the other hand, Figure 2 This is a block diagram of a temperature measuring device according to an embodiment of the present invention.

[0062] The temperature measuring device 200 can be located on at least a portion of at least one side of at least one battery cell 300 and measures the temperature of at least one battery cell 300. Additionally, the temperature measuring device 200 can be located on at least a portion of the top surface of at least one battery cell 300. Furthermore, even when a battery cell 300 is a large-capacity battery cell with a wide surface area, the temperature measuring device 200 can still be located on at least a portion of at least one side of a battery cell 300 and measure the temperature of the battery cell 300. On the other hand, there can be a plurality of battery cells 300, and the temperature measuring device 200 can be located on at least a portion of at least one side of a plurality of battery cells and measure the temperature of a plurality of battery cells 300.

[0063] The temperature measuring device 200 may include: a focusing unit 21 that focuses electromagnetic waves with a fixed wavelength that are emitted from at least one battery cell; a light receiving unit 22 that receives the focused electromagnetic waves 290; and a control unit 23 that acquires temperature spectrum information based on the received electromagnetic waves and determines the temperature of at least one battery cell 300 based on the acquired temperature spectrum information.

[0064] On the other hand, at least one battery cell can be a battery cell included in a battery for electric vehicles. A battery cell can be the basic unit of a lithium-ion battery capable of being used by replenishing and releasing electrical energy. A battery cell in the form of a quadrilateral aluminum casing can include an anode, a cathode, a separator membrane, and an electrolyte.

[0065] On the other hand, to protect at least one battery cell from external impacts, heat, and vibration, it can be assembled into a prescribed frame to form a battery module. Furthermore, at least one battery module can be installed into various control and protection systems, such as a battery management system or cooling system, to form a battery pack that can be installed in an electric vehicle.

[0066] on the other hand, Figure 3 This is a diagram illustrating a temperature measuring device according to an embodiment of the present invention.

[0067] The temperature measuring device 200 of the present invention may include borrowed or modified components. Figure 1 The configuration described herein is part or all of the existing ordinary backlight unit 100. The backlight unit 100 uses a light guide plate 130 to change the path of the light entering from the light source unit 110, so that it is emitted to the other side. Conversely, the temperature measuring device 200 gathers the electromagnetic wave 290 entering from the light guide plate 240 and radiates it to the light receiving unit 22.

[0068] The temperature measuring device 200 may include: a focusing unit 21 that focuses electromagnetic waves 290 with a fixed wavelength that radiate thermal energy from at least one battery cell 300; a light receiving unit 22 that receives the focused electromagnetic waves 290; and a control unit 23 that acquires temperature spectrum information based on the received electromagnetic waves 290 and confirms the temperature of at least one battery cell 300 based on the acquired temperature spectrum information.

[0069] Temperature measuring device 200 may be located on one side of at least one battery cell 300 and measures the temperature of at least one battery cell 300. A gathering portion 21 may be located in at least a portion of one side of at least one battery cell. For example, the gathering portion 21 may be located on the upper part of at least one battery cell 300 and measures the temperature of at least one battery cell 300.

[0070] On the other hand, the gathering part 21 may include a protective film 210, a prism sheet 220, a diffuser sheet 230, a light guide plate 240, an optical pattern part 250, and a reflective member 260.

[0071] The protective film 210 serves to protect the aggregate portion 21. The protective film 210 may be made of a transparent acrylic resin, but is not limited to this. The protective film 210 also serves to protect against damage caused by contact with the battery cell 300.

[0072] On the other hand, the prism sheet 220, as a sheet that improves light efficiency, can change the front light entering from the battery cell 300 into side light.

[0073] On the other hand, the diffuser 230 can scatter the light that is incident on the light guide plate 240 again, so that the light can be incident evenly.

[0074] On the other hand, when an electromagnetic wave 290 radiated from at least one battery cell 300 enters the light guide plate 240, the light guide plate 240 can change the path of the electromagnetic wave 290 so that it exits to the other side.

[0075] For example, the light guide plate 240 can alter the path of electromagnetic waves 290 incident from at least one battery cell 300 in a substantially perpendicular direction. Additionally, the light guide plate 240 can be made of a light-transmitting material with a constant refractive index.

[0076] On the other hand, the reflective member 260 can reduce the loss of electromagnetic waves 290 incident on the light guide plate 240. The reflective member 260 can be formed in the form of a film, but is not limited to this. In addition, the reflective member 260 may include an optical pattern portion 250. The optical pattern portion 250 can diffuse or reflect electromagnetic waves incident from at least one battery cell 300 so that the light is not concentrated. Patterns that perform light reflection, light diffusion, light scattering, or light blocking can be formed in the optical pattern portion 250.

[0077] On the other hand, the light-receiving part 22 may include a light-receiving sensor 270 or a light-receiving cover 280. The light-receiving sensor 270 can receive electromagnetic waves 290 focused by the focusing part 21. For example, the light guide plate 240 can change the path of the incident electromagnetic waves 290 so that they are directed toward the light-receiving sensor 270, and the light-receiving sensor 270 can receive the electromagnetic waves 290 moving along the changed path. The light-receiving sensor 270 may be disposed adjacent to the side of the light guide plate.

[0078] The light sensor 270 can be an infrared sensor. An infrared sensor can be a sensor that uses infrared light to detect physical quantities such as temperature and converts them into electrical signals that can be processed.

[0079] Figure 4 This is an exploded perspective view showing a temperature measuring device according to an embodiment of the present invention.

[0080] The light-receiving part 22 may also include a plurality of light-receiving sensors 270.

[0081] Reference Figure 4 A plurality of light-receiving sensors 270 can be supported by light-receiving sensor supports 281. The plurality of light-receiving sensors 270 can be arranged adjacent to one side of the light guide plate 240 at predetermined intervals. Therefore, when the electromagnetic waves 290 emitted from the plurality of battery cells 300 change path and converge to one side of the light guide plate 240, the plurality of light-receiving sensors 270 can sufficiently receive the converged electromagnetic waves 290.

[0082] On the other hand, the focusing part 21 may include a Fresnel lens 500.

[0083] As a type of focusing lens, the Fresnel lens 500 is a lens that reduces its thickness while performing the function of focusing light like a convex lens. The Fresnel lens 500 can concentrate electromagnetic waves emitted from at least one battery cell 300 to one point, and allow the concentrated electromagnetic waves to be directed into the light guide plate 240.

[0084] In one embodiment, the lateral or vertical length of the Fresnel lens 500 can be greater than that of the light guide plate 240. Therefore, even when the light guide plate 240 is smaller than the upper region of at least one battery cell 300, the Fresnel lens 500 covers the upper region of at least one battery cell 300, thereby concentrating electromagnetic waves emitted from at least one battery cell 300 so that the concentrated electromagnetic waves enter the light guide plate 240.

[0085] In addition, the temperature measuring device according to another embodiment of the present invention may include: a focusing part, including a Fresnel lens 500 disposed adjacent to at least one battery cell 300 and focusing electromagnetic waves emitted from at least one battery cell 300; and a light receiving part, including at least one light receiving sensor 270 located in the formation direction of the focal point of the Fresnel lens.

[0086] For example, in the temperature measuring device 200, a Fresnel lens 500 may be disposed on the top surface of at least one battery cell 300, with the focal point of the Fresnel lens 500 facing upwards. Additionally, a light-receiving section may be included, with at least one light-receiving sensor 270 disposed in the direction in which the focal point of the Fresnel lens 500 is formed. In this case, the light-receiving sensor 270 may be configured to receive electromagnetic waves concentrated from the Fresnel lens 500. Therefore, even without the light guide plate 240, the temperature measuring device 200 can receive electromagnetic waves emitted from at least one battery cell 300 and use them to measure temperature.

[0087] Figure 5 This is a top view showing a temperature measuring device according to an embodiment of the present invention.

[0088] The gathering portion 21 may have a shape in which the width gradually decreases from the side opposite to the side where the light-receiving portion 22 is disposed toward the side where the light-receiving portion 22 is disposed.

[0089] Reference Figure 5 The focusing section 21 can have a shape in which the width W gradually decreases from the side B opposite to the side A where the light-receiving section 22 is disposed towards the side A where the light-receiving section 22 is disposed. Therefore, electromagnetic waves 290 incident on the focusing section 21 can be focused onto the light-receiving section 22 by the shape of the focusing section 21 (e.g., the shape of the light guide plate 240). Therefore, electromagnetic waves 290 emitted from at least one battery cell 300 can be received using only one light-receiving sensor 270. As a result, the number of light-receiving sensors 270 can be minimized, and electromagnetic waves 290 can be sufficiently received even when using low-sensitivity light-receiving sensors 270, thereby enabling temperature measurement.

[0090] Figures 6 to 8 This is a diagram illustrating a temperature measurement method according to an embodiment of the present invention.

[0091] Figure 6 This is a diagram illustrating the temperature distribution of at least one battery cell 300 according to an embodiment of the present invention.

[0092] Figure 6 The diagram shows temperature distribution information 601 of one side of at least one battery cell 300, obtained using an infrared thermal imaging sensor or similar method. However, in order to obtain... Figure 6 The temperature distribution data of at least one battery cell 300 presents a problem: the thermal imaging sensor needs to measure the temperature of the battery cell 300 from a location that ensures a sufficient distance from the battery cell 300.

[0093] Figure 7 This is a diagram illustrating a method for obtaining temperature spectrum information according to an embodiment of the present invention.

[0094] The control unit 23 can acquire temperature spectrum information 701 based on the electromagnetic waves received by the light receiving unit 22.

[0095] The electromagnetic wave received by the light-receiving unit 22 is an electromagnetic wave with a fixed wavelength that is based on the heat energy emitted from at least one battery cell 300, and the control unit 23 can acquire the temperature spectrum information of the received electromagnetic wave.

[0096] The control unit 23 can measure the temperature of at least a portion of one side of at least one battery cell based on temperature spectrum information.

[0097] For example, the control unit 23 can acquire intensity information based on wavelength based on temperature spectrum information.

[0098] Figure 8 This is a diagram illustrating intensity information based on wavelength according to an embodiment of the present invention.

[0099] Reference Figure 8 The control unit 23 can acquire intensity information 801 based on the wavelength of the electromagnetic wave received by the light receiving unit 22.

[0100] Generally, if an object radiates electromagnetic waves with short wavelengths, it has high energy and therefore a high temperature; conversely, if an object radiates electromagnetic waves with long wavelengths, it has low energy and therefore a low temperature.

[0101] The control unit 23 can measure the temperature of at least one battery cell 300 based on intensity information according to the wavelength.

[0102] For example, if the control unit 23 detects a wavelength intensity lower than a preset intensity below a preset wavelength based on intensity information of the wavelength, it can determine that the entire area of ​​at least one battery cell 300 is heating up at a temperature lower than a reference value.

[0103] Additionally, for example, if the control unit 23 detects a wavelength intensity above a preset intensity below a preset wavelength based on intensity information of the wavelength, it can determine that at least one designated area of ​​the battery cell 300 is heating up at a temperature above a reference value.

[0104] Therefore, the temperature measuring device 200 can distinguish whether a specified area of ​​at least one battery cell 300 is heating at a temperature above a reference value, without needing to measure the temperature of each of the at least one battery cell 300 separately.

[0105] on the other hand, Figure 9 This is a diagram illustrating a temperature measuring device according to an embodiment of the present invention.

[0106] At least one battery cell 300 may further include an amplifying light source 301 for amplifying electromagnetic waves of a fixed wavelength that are heated according to the temperature generated by radiation and directing them onto a light guide plate. The amplifying light source 301 may be located between the battery cell 300 and the focusing section 21. The amplifying light source 301 may emit infrared light with wavelengths in the infrared region.

[0107] On the other hand, the battery cell 300 may include a layer 302 coated with a Zion pigment on the side facing the aggregation portion 21. The Zion pigment may be a pigment that changes color according to temperature. The layer 302 may be a layer coated with a Zion pigment that changes to a predetermined color when the battery cell 300 exceeds a temperature used to maintain stability (e.g., 60 degrees Celsius).

[0108] Therefore, when a designated area of ​​at least one battery cell 300 exceeds a reference temperature for maintaining stability, layer 302 changes to a designated color (e.g., black), thereby reducing the amount of electromagnetic waves incident on the light guide plate 240, and consequently reducing the intensity of the electromagnetic waves received by the light-receiving section 22. In this case, if the intensity of the electromagnetic waves received by the control section 23 through the light-receiving section 22 is below a reference value, it can also be determined that a designated area of ​​at least one battery cell 300 exceeds the reference temperature for maintaining stability.

[0109] Figure 10 This is a diagram illustrating a temperature measuring device according to another embodiment of the present invention.

[0110] The temperature measuring device 1100 can measure the temperature of at least one battery cell 1200 at a position spaced apart from one side of at least one battery cell.

[0111] The temperature measuring device 1100 can measure the temperature of at least one battery cell 1200 at a predetermined distance from at least a portion of one side of at least one battery cell. Alternatively, the distance can be the focal distance of the focusing portion 1110, so that the focusing portion 1110 can focus electromagnetic waves 1300, enabling the temperature measuring device 1100 to measure the temperature of at least a portion of one side of at least one battery cell.

[0112] Alternatively, the temperature measuring device 1100 may be located at a predetermined distance from at least a portion of one side of at least one battery cell.

[0113] In addition, when a battery cell 1200 is a large-capacity battery cell with a wide surface, the temperature measuring device 1200 can measure the temperature of the battery cell 1200 at a position separated from one side of the battery cell 1200 by a predetermined distance.

[0114] The temperature measuring device 1100 may include: a focusing unit 1110 that focuses electromagnetic waves 1300 with a fixed wavelength based on the heat energy emitted from at least one battery cell; a light receiving unit 1120 that receives the focused electromagnetic waves 1300; and a control unit 1130 that acquires temperature spectrum information based on the received electromagnetic waves and confirms the temperature of at least one battery cell 1200 based on the acquired temperature spectrum information.

[0115] The focusing section 1110 can focus the electromagnetic waves 1300 emitted from one or more battery cells 1200 onto the light receiving section 1120.

[0116] On the other hand, the light-receiving unit 1120 may include a light-receiving sensor 1121. The light-receiving sensor 1121 can receive the electromagnetic wave 1300 focused by the focusing unit 1110. For example, the focusing unit 1110 may change the path of the incident electromagnetic wave 1300 so that it is directed toward the light-receiving sensor 1121, and the light-receiving sensor 1121 can receive the electromagnetic wave 1300 moving along the changed path. Alternatively, the light-receiving sensor 1121 may be an infrared sensor. An infrared sensor may be a sensor capable of detecting physical quantities such as temperature using infrared light and converting them into electrical quantities that can be processed as signals.

[0117] On the other hand, at least one battery cell 1200 is a battery cell included in a battery for electric vehicles. The battery cell 1200 can be a basic unit of a lithium-ion battery capable of being used by replenishing and releasing electrical energy. The battery cell 1200 is in the form of a quadrilateral aluminum casing and may include an anode, a cathode, a separator, and an electrolyte. However, it is not limited to this, and the battery cell 1200 can be configured in various forms such as a cylindrical casing, a polymer bag, etc.

[0118] On the other hand, to protect at least one battery cell from external impacts, heat, and vibration, it can be assembled into a prescribed frame to form a battery module. Furthermore, at least one battery module can be installed in various control and protection systems, such as a battery management system or cooling system, to form a battery pack that can be installed in an electric vehicle.

[0119] on the other hand, Figure 11 This is a diagram illustrating the aggregation section of an embodiment of the present invention.

[0120] The focusing section 1110 may include a focusing lens 1111 capable of focusing the electromagnetic waves 1300 emitted from the battery unit 1200. The focusing lens 1111 can focus the electromagnetic waves 1300 at an angle of approximately 180 degrees. For example, the focusing lens 1111 can focus the electromagnetic waves 1300 at an angle of approximately 178 degrees, which is greater than the wide angle (or field of view) of a conventional lens.

[0121] The focusing lens 1111 may have a through-hole shape with openings at the top and bottom. For example, the upper part of the focusing lens 1111 may be open to form a first opening 1114, and the lower part may be open to form a second opening 1115. The first opening 1114 and the second opening 1115 may penetrate each other. Alternatively, the focusing lens 1111 may include a lens body 1112 made of a light-transmitting material. The focusing lens 1111 may have an inclined portion 1113, which is formed to gradually narrow inward along the center line of the electromagnetic wave focused from the outside. That is, the focusing lens 1111 may have a cut conical through-hole formed on the inside. Therefore, the electromagnetic wave 1300 emitted from at least one battery cell 1200 can enter the light-receiving portion 1120 through the through-hole. In addition, the inclined portion 1113 may have an inclined surface that is recessed from the first opening 1114 to the second opening 1115. On the other hand, the diameter of the first opening 1114 may be larger than the diameter of the second opening 1115.

[0122] On the other hand, a coating portion 1116 with a specified reflectivity can be formed on the inclined portion 1113. In this case, the coating can be a non-ferrous metal coating such as silver, aluminum, gold, chromium, stainless steel, brass, zinc, magnesium alloy, etc.

[0123] on the other hand, Figure 12 This is a diagram illustrating the aggregation section of an embodiment of the present invention.

[0124] Figure 12 yes Figure 11 A cross-sectional view AA' of focusing lens 1111 is used to illustrate an example of electromagnetic waves 1300 emitted from at least one battery cell 1200 being focused.

[0125] The focusing lens 1111 of the focusing portion 1110 can be configured to have a first opening 1114 with a diameter larger than that of the second opening 1115, facing at least one battery cell 1200. On the other hand, a light-receiving portion 1120 can be provided on the side of the second opening 1115. On the other hand, the tilt angle of the tilt portion 1113 can be determined based on the image angle of the sensor receiving the electromagnetic wave 1300.

[0126] The focusing lens 1111 can focus the electromagnetic wave 1300 incident from the first opening 1114 onto the second opening 1115. The electromagnetic wave 1300 incident from the first opening 1114 can be focused onto the second opening 1115 by the tilting portion 1113 and the coating portion 1116. A light-receiving portion 1120 can be disposed on the side of the second opening 1115. Therefore, the light-receiving portion 1120 can receive the electromagnetic wave 1300 focused onto the second opening 1115. On the other hand, the second opening 1115 can contact the lens surface of the light-receiving sensor 1121 of the light-receiving portion 1120. Therefore, the electromagnetic wave 1300 focused onto the second opening 1115 can be incident onto the lens of the light-receiving sensor 1121. The lens of the light-receiving sensor 1121 can be configured to direct the incident electromagnetic wave 1300 toward the sensor of the light-receiving sensor 1121.

[0127] In addition, the focusing lens 1111 can focus the electromagnetic wave 1300 incident on the lens body 1112 onto the side of the second opening 1115.

[0128] on the other hand, Figure 13 This is a diagram illustrating a temperature measuring device according to an embodiment of the present invention.

[0129] Reference Figure 13 The image shows a light-receiving sensor 1121 disposed in the second opening 1115 of the gathering section 1110.

[0130] The light sensor 1121 can receive electromagnetic waves gathered by the focusing part 1110. The diameter L3 of the receiving range of the light sensor 1121 that can receive electromagnetic waves can be less than or equal to the diameter L1 of the first opening 1114 and greater than or equal to the diameter L2 of the second opening 1115.

[0131] Therefore, the light sensor 1121 can have a receiving range that can not only receive electromagnetic waves that enter from the first opening 1114 and are focused into the second opening 1115, but also receive electromagnetic waves that enter into the focusing lens body 1112 and are refracted or reflected.

[0132] on the other hand, Figure 14 This is a diagram illustrating a temperature measuring device configured in a battery cell according to an embodiment of the present invention.

[0133] Electromagnetic waves 1300 with a fixed wavelength radiated by the heat energy generated by at least one battery cell 1200 can be focused onto a light-receiving unit 1120 via a focusing unit 1110. The light-receiving unit 1120 can receive the focused electromagnetic waves 1300. The control unit 1130 can acquire temperature spectrum information based on the electromagnetic waves received by the light-receiving unit 1120.

[0134] Figures 15 to 17 This is a diagram illustrating a temperature measurement method according to an embodiment of the present invention.

[0135] Figure 15 This is a diagram illustrating the temperature distribution of at least one battery cell 1200 according to an embodiment of the present invention.

[0136] Figure 15 The diagram shows temperature distribution information 1601 of one side of at least one battery cell 1200, obtained using an infrared thermal imaging sensor or the like. However, thermal imaging sensors, etc., in order to obtain... Figure 15 The issue with obtaining temperature distribution data for at least one battery cell 1200 presents the problem that the temperature of the battery cell 1200 needs to be measured at a location that ensures a sufficient distance from the battery cell 1200. In contrast, a temperature measuring device 1100 of an embodiment of the present invention only needs to measure whether at least a portion of the area of ​​the at least one battery cell 1200 exceeds a specific temperature, without needing to obtain temperature distribution information of the battery cell 1200.

[0137] Figure 16 This is a diagram illustrating a method for obtaining temperature spectrum information according to an embodiment of the present invention.

[0138] The control unit 1130 can acquire temperature spectrum information 1701 based on the electromagnetic waves received by the light receiving unit 1120.

[0139] The electromagnetic wave received by the light-receiving unit 1120 is an electromagnetic wave with an inherent wavelength based on the thermal energy emitted from at least one battery cell 1200, and the control unit 1130 can acquire the temperature spectrum information of the received electromagnetic wave.

[0140] The control unit 1130 can measure the temperature of at least a portion of one side of at least one battery cell based on temperature spectrum information.

[0141] For example, the control unit 1130 can acquire intensity information based on wavelength based on temperature spectrum information. The intensity information based on wavelength may be temperature occurrence area information related to the area of ​​temperature occurring in at least one battery cell 1200.

[0142] Figure 17 This is a diagram illustrating intensity information based on wavelength according to an embodiment of the present invention.

[0143] Reference Figure 17 The control unit 1130 can acquire intensity information 1801 of the electromagnetic wave received by the light receiving unit 1120 based on the wavelength.

[0144] Generally, if an object radiates electromagnetic waves with short wavelengths, it has high energy and therefore a high temperature; conversely, if an object radiates electromagnetic waves with long wavelengths, it has low energy and therefore a low temperature.

[0145] The control unit 1130 can measure the temperature of at least one battery cell 1200 based on intensity information of the wavelength. For example, the control unit 1130 can determine whether a specific temperature occurs based on the intensity information of the wavelength and measure the temperature of at least one battery cell 1200.

[0146] For example, if the control unit 1130 detects a wavelength intensity lower than a preset intensity below a preset wavelength based on intensity information of the wavelength, it can determine that the entire area of ​​at least one battery cell 1200 is being heated at a temperature lower than a reference value.

[0147] Additionally, for example, if the control unit 1130 detects a wavelength intensity above a preset intensity below a preset wavelength based on intensity information of the wavelength, it can determine that a specified area of ​​at least one battery cell 1200 is being heated at a temperature above a reference value.

[0148] Therefore, the temperature measuring device 1100 can distinguish whether a specified area of ​​at least one battery cell 1200 is heating at a temperature above a reference value, without needing to measure the temperature of each of the at least one battery cell 1200 separately.

[0149] The above description is for illustrative purposes only, and those skilled in the art can make various modifications and variations without departing from the essential characteristics of the present invention.

[0150] Therefore, the embodiments disclosed in this invention are not intended to limit the technical concept of the invention, but are used to explain the technical concept, and the scope of the technical concept of the invention is not limited by these embodiments.

[0151] The scope of protection of this invention shall be interpreted by the appended claims, and all technical ideas within the equivalent scope shall be interpreted as being included within the scope of this invention.

Claims

1. A temperature measuring device, wherein, include: A focusing section, located in at least a portion of one side of at least one battery cell, focuses electromagnetic waves radiated from the at least one battery cell. The light-receiving part receives the collected electromagnetic waves; as well as The control unit measures the temperature of at least a portion of one side of the at least one battery cell based on the received electromagnetic waves. The aggregation section includes: A protective film is used to protect the aggregated portion; The prism sheet converts the front light emitted from the battery cell into side light and improves light efficiency. A light guide plate, when an electromagnetic wave radiated from at least one of the battery cells is incident on it, changes the path of the incident electromagnetic wave so that it exits to the other side; A diffuser sheet scatters the light incident on the light guide plate again, so that the light can enter evenly. A reflecting member is disposed on the surface of the gathering portion opposite to the surface into which the electromagnetic wave enters, to reflect or diffuse the electromagnetic wave; An optical pattern section is provided to diffuse or reflect electromagnetic waves incident from at least one of the battery cells, so that the light is not concentrated.

2. The temperature measuring device according to claim 1, characterized in that, The at least one battery cell is a plurality of battery cells.

3. The temperature measuring device according to claim 1, characterized in that, The control unit acquires temperature spectrum information based on the received electromagnetic waves, and measures the temperature of at least a portion of one side of the at least one battery cell based on the temperature spectrum information.

4. The temperature measuring device according to claim 1, characterized in that, The light-receiving part includes: At least one light-receiving sensor is disposed on one side of the light guide plate to detect the infrared region of the electromagnetic wave.

5. The temperature measuring device according to claim 4, characterized in that, The light-receiving part includes a plurality of light-receiving sensors, which are arranged at predetermined intervals on one side of the light guide plate.

6. The temperature measuring device according to claim 1, characterized in that, The aggregation section also includes: A Fresnel lens, located closer to the at least one battery cell than the light guide plate, concentrates the electromagnetic waves emitted from the at least one battery cell.

7. The temperature measuring device according to claim 6, characterized in that, The lateral or longitudinal length of the Fresnel lens is greater than that of the light guide plate.

8. The temperature measuring device according to claim 1, wherein, The gathering portion has a shape in which the width gradually decreases from the side opposite to the side where the light-receiving portion is disposed toward the side where the light-receiving portion is disposed.

9. The temperature measuring device according to claim 8, wherein, The light-receiving part includes: A light-receiving sensor is disposed on the side of the light-receiving portion where the width of the focusing portion is reduced, and detects the infrared region of the electromagnetic wave.

10. The temperature measuring device according to claim 1, wherein, In the control unit, Based on the temperature spectrum information, intensity information based on wavelength is obtained, and based on the intensity information based on wavelength, when a wavelength intensity above a predetermined intensity is detected below a predetermined wavelength, it is determined that at least a portion of the area of ​​the at least one battery cell is heating at a temperature above a reference value.

11. The temperature measuring device according to claim 1, wherein, The focusing section includes a Fresnel lens adjacent to the at least one battery cell, which concentrates the electromagnetic waves emitted from the at least one battery cell. The light-receiving part includes at least one light-receiving sensor located in the direction that forms the focal point of the Fresnel lens.

Images