Apparatus for measuring temperature of battery cell and method for measuring temperature of battery cell using same

Abstract

The present invention relates to an apparatus for measuring the temperature of a pouch battery cell and a method for measuring the temperature of a battery cell using same and, more specifically, to an apparatus for measuring the temperature of a battery cell and a method for measuring the temperature of a battery cell using same, the apparatus being characterized by comprising: a connection part including a first plate in close contact with one surface of a battery cell, a second plate in close contact with the other surface of the battery cell and having one or more through-holes formed therein, and a first connection part detachably coupled to the through-holes; and a temperature measurement part for measuring the temperature of the battery cell via the connection part and the through-holes, wherein a fastening part coupled to the connection part is provided on the outer circumferential surface of the through-holes.

Description

Battery cell temperature measuring device and battery cell temperature measuring method using the same

[0001] This application claims the benefit of priority to Korean Patent Application No. 2024-0109286, filed August 14, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a battery cell temperature measuring device and a battery cell temperature measuring method using the same, and more particularly, to a battery cell temperature measuring device capable of measuring temperature changes in a battery cell while blocking the external temperature and stably fixing the same, and a battery cell temperature measuring method using the same.

[0003] Recently, due to the development of alternative energy sources to address air pollution and energy depletion caused by the use of fossil fuels, demand for secondary batteries that can store generated electric energy is increasing.

[0004] Secondary batteries, the energy source for various electronic devices indispensable in modern society, are seeing increased capacity requirements due to the increasing use and complexity of mobile devices and the development of electric vehicles. To meet user demand, small devices are equipped with multiple battery cells. However, automobiles and other devices utilize battery modules, which electrically connect multiple battery cells, or battery packs comprising multiple such modules.

[0005] Meanwhile, in the process of charging and discharging a battery cell or testing the performance of a battery cell, the temperature change of the battery cell is measured through a temperature measuring member to determine whether the battery cell is in an abnormal state.

[0006] However, during the process of measuring the temperature change of the battery cell, the temperature measuring member attached to the battery cell may fall off, making accurate temperature measurement impossible.

[0007] Fig. 1 is a schematic diagram of a battery cell jig for temperature measurement according to the prior art. As illustrated in Fig. 1, the battery cell jig according to the prior art is configured to include a first plate (10) on which a battery cell (1) is mounted, a second plate (20) that is in close contact with the upper surface of the battery cell (1), and a temperature measuring unit (30) that is in close contact with the first plate (10) and measures the temperature change of the battery cell (1).

[0008] The temperature measuring unit (30) according to the prior art includes an absorption pad (31) and a cable (32). At this time, the absorption pad (31) has a hemispherical body and is structured such that when pressure is applied, air in the empty space within the hemispherical body escapes and is absorbed.

[0009] However, there is a problem that the first plate (10) can be easily detached due to a flaw or external impact.

[0010] (Prior art literature)

[0011] (Patent Document 1) Korean Patent Publication No. 2023-0045407

[0012] In order to solve the above problems, the present invention aims to provide a battery cell temperature measuring device having a structure in which a temperature measuring unit for measuring the temperature of a battery cell can be stably fixed at a fixed position, thereby improving the reliability of the measurement result, and a battery cell temperature measuring method using the same.

[0013] In order to achieve the above purpose, a battery cell temperature measuring device according to the present invention comprises a first plate (100) that is in close contact with one surface of a battery cell (S), a second plate (200) that is in close contact with the other surface of the battery cell (S) and has at least one through hole (210) formed therein, a connecting portion (300) including a first connecting portion (310) that is detachably connected to the through hole (210), and a temperature measuring portion (400) that measures the temperature of the battery cell (S) via the connecting portion (300) and the through hole (210), wherein a fastening portion (220) that is connected to the connecting portion (300) is provided on the outer surface of the through hole (210).

[0014] In the battery cell temperature measuring device according to the present invention, the fastening portion (220) includes a first support portion (221) having one side fixed to the second plate (200) and extended by a certain length, a second support portion (222) in the shape of a flange provided on the other edge of the first support portion (221), and a receiving protrusion (223) having a shape bent at a certain angle and positioned on the second support portion (222), and the first connecting portion (310) includes a first extension portion (311) having a cylindrical shape extended by a certain length, a first flange portion (312) provided on the outer surface of the first extension portion (311), and a first connecting protrusion (313) having a shape bent at a certain angle and positioned on the lower surface of the first flange portion (312) and fastened to the receiving protrusion (223).

[0015] In the battery cell temperature measuring device according to the present invention, the first connecting portion (310) is characterized in that it is made of an insulating material.

[0016] In the battery cell temperature measuring device according to the present invention, the insulating material is characterized in that it includes at least one of bakelite, PVC, Teflon, and silicone rubber.

[0017] In the battery cell temperature measuring device according to the present invention, when the fastening part (220) and the first connecting part (310) are fastened, one edge of the first extension part (311) of the first connecting part (310) is in close contact with the inner surface of the through hole (210) of the second plate (200).

[0018] In the battery cell temperature measuring device according to the present invention, the temperature measuring unit (400) is characterized by including a temperature sensor (410) that is in close contact with one surface of the battery cell (S), a cable (420) having a predetermined length and connected to the temperature sensor (410), and a cylindrical packing member (430) having an outer diameter that surrounds the cable (420) and is in close contact with the inner surface of the first extension portion (311).

[0019] In the battery cell temperature measuring device according to the present invention, the second plate (200) has a plurality of through holes (210), and further includes a second connecting portion (320) for sealing at least one of the plurality of through holes (210).

[0020] In the battery cell temperature measuring device according to the present invention, the plurality of through holes (210) are characterized in that they are formed to be spaced apart at a certain interval along the length direction or width direction of the battery cell.

[0021] In the battery cell temperature measuring device according to the present invention, the second connecting portion (320) includes a second extension portion (321) having a cylindrical shape extended by a certain length, a second flange portion (322) provided on the outer surface of the second extension portion (321), and a second connecting protrusion (323) having a shape bent at a certain angle and connected to the receiving protrusion (223) located on the lower surface of the second flange portion (322), wherein the second extension portion (321) is characterized in that one or the other side is sealed.

[0022] A method for measuring a battery cell temperature according to the present invention is characterized by including a first step of positioning a battery cell between the first plate and the second plate, a second step of fixing the first plate and the second plate, and a third step of connecting a fastening portion provided on the second plate and a first connecting portion and measuring the temperature of the battery cell with a temperature measuring portion.

[0023] As described above, the battery cell temperature measuring device according to the present invention and the battery cell temperature measuring method using the same have the advantage of minimizing the temperature measuring unit from being detached due to external impact, etc., by providing a fastening portion on the plate and a connecting portion that is structurally detachable from the fastening portion.

[0024] In addition, according to the battery cell temperature measuring device and battery cell temperature measuring method using the same according to the present invention, the plate is provided with a plurality of through holes for temperature measurement, so that the temperature of various parts of the battery cell can be selectively measured.

[0025] In addition, according to the battery cell temperature measuring device and the battery cell temperature measuring method using the same according to the present invention, since a connecting portion of an insulating material is located around the temperature sensor, the influence of the external temperature can be minimized, which has the advantage of increasing the reliability of the measurement result.

[0026] Figure 1 is a schematic diagram of a battery cell jig for temperature measurement according to the prior art.

[0027] Fig. 2 is a perspective view showing a battery cell temperature measuring device according to the first embodiment of the present invention.

[0028] Fig. 3 is an exploded perspective view of the battery cell temperature measuring device illustrated in Fig. 2.

[0029] FIG. 4 is an enlarged perspective view for explaining the joint structure of the fastening portion and the first connecting portion in the battery cell temperature measuring device illustrated in FIG. 2.

[0030] Fig. 5 is a vertical cross-sectional view showing a portion of a cross-section cut along line AA of Fig. 2.

[0031] Fig. 6 is a perspective view showing a battery cell temperature measuring device according to a second embodiment of the present invention.

[0032] Fig. 7 is an exploded perspective view of the battery cell temperature measuring device illustrated in Fig. 6.

[0033] Fig. 8 is an enlarged perspective view for explaining the joint structure of the fastening portion and the second connecting portion in the battery cell temperature measuring device illustrated in Fig. 6.

[0034] Fig. 9 is a vertical cross-sectional view showing a portion of a cross-section cut along line BB of Fig. 6.

[0035] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail, so that those skilled in the art can easily implement the present invention. However, when describing the operating principles of preferred embodiments of the present invention in detail, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the gist of the present invention, such detailed descriptions will be omitted.

[0036] Additionally, the same drawing reference numerals are used for parts with similar functions and actions throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only direct connections but also indirect connections with other elements intervening. Furthermore, inclusion of a component does not exclude other components unless specifically stated otherwise, but rather implies the inclusion of additional components.

[0037] Hereinafter, a battery cell temperature measuring device according to the present invention and a battery cell temperature measuring method using the same will be described with reference to the attached drawings.

[0038] Fig. 2 is a perspective view showing a battery cell temperature measuring device according to a first embodiment of the present invention, and Fig. 3 is an exploded perspective view of the battery cell temperature measuring device shown in Fig. 2. In addition, Fig. 4 is an enlarged perspective view for explaining the joint structure of a fastening portion and a first connecting portion in the battery cell temperature measuring device shown in Fig. 2, and Fig. 5 is a vertical cross-sectional view showing a portion of a cross-section taken along line AA of Fig. 2.

[0039] Referring to these Figures 2 to 5, a battery cell temperature measuring device according to a preferred first embodiment of the present invention is configured to include a first plate (100), a second plate (200), a connecting portion (300), and a temperature measuring portion (400).

[0040] First, the first plate (100) is a flat plate having a certain area and serves to support the lower surface of the battery cell (S) to be measured.

[0041] The second plate (200) has a flat shape that is in close contact with the upper surface of the battery cell (S) mounted on the first plate (100), and has a through hole (210) and a fastening portion (220) formed therein.

[0042] Here, a through hole (210) is cut in the thickness direction of the second plate (200), and a temperature sensor (410) of a temperature measuring unit (400) passes through it.

[0043] The fastening portion (220) is provided at the upper portion along the edge of the through hole (210), i.e., at the upper portion of the second plate (200), and is detachably connected to the first connecting portion (310), and is configured to include a first support portion (221), a second support portion (222), and a receiving projection (223).

[0044] In detail, the first support member (221) is formed by extending a certain length in the vertical direction while one side is fixed to the edge of the through hole (210) of the second plate (200).

[0045] In detail, the first support portion (221) may be formed as a structure extending vertically in some area of ​​the edge area of ​​the through hole (210), and this structure can check the inserted depth and state of the first extension portion (311) when the first extension portion (311) is inserted into the first support portion (221).

[0046] Of course, the outer shape of the first support (221) can also be a roughly cylindrical shape with a hollow center.

[0047] The second support member (222) can be formed in a circular band shape extending a certain length in a horizontal direction from the other edge of the first support member (221).

[0048] The receiving protrusion (223) is located near the outer edge of the second support member (222), is formed in a shape bent at a certain angle, and is connected to the first connecting protrusion (313) of the connecting member (300) described later.

[0049] In detail, the receiving protrusion (223) may be formed in a part of the outer edge area of ​​the second support portion (222), and may have a structural shape that extends vertically from the outer edge and then extends a certain length toward the center of the first support portion (221).

[0050] These receiving projections (223) can be formed as a pair facing each other on the upper side of the outer edge of the second support member (222).

[0051] Continuing, the connecting portion (300) is detachable from the aforementioned fastening portion (220) and includes a first connecting portion (310) for firmly fixing the temperature measuring portion (400) to a set position.

[0052] The first connecting portion (310) is made of an insulating material so that the internal space can suppress the influence of external temperature. The insulating material may include, for example, one or more of Bakelite, PVC, Teflon, and silicone rubber, and is not limited thereto as long as it is an insulating material that can block external temperature.

[0053] This first connecting portion (310) is configured to include a first extension portion (311), a first flange portion (312), and a first connecting projection (313).

[0054] The first extension part (311) is formed in a cylindrical shape extended to a certain length, and when the first connection part (310) and the fastening part (220) are closely connected to each other, it is inserted into the inside of the first support part (221) so that one edge is in close contact with the inner surface of the through hole (210).

[0055] That is, the outer diameter of the first extension (311) is formed to a size that can be in close contact with the inner diameter of the through hole (210).

[0056] The first flange portion (312) is provided to extend horizontally from the outer surface of the first extension portion (311) by a certain length, and can be formed to have the same outer diameter as the outer diameter of the second support portion (222) of the fastening portion (220).

[0057] The first connecting protrusion (313) is provided in a portion of the lower surface of the first flange portion (312) and has a shape bent at a certain angle.

[0058] In other words, the first connecting protrusion (313) may be a structural shape that extends vertically in the direction toward the second support member (222) and then extends a certain length in the outer direction of the first extension member (311).

[0059] These first connecting protrusions (313) can be formed as a pair facing each other on the lower surface of the first flange portion (312).

[0060] Accordingly, the first connecting protrusion (313) is shaped to interlock with the receiving protrusion (223) of the fastening portion (220), and as the first connecting portion (310) and the fastening portion (220) rotate while in close contact with each other, the first connecting protrusion (313) and the receiving protrusion (223) are fastened, and movement in the vertical direction is restricted.

[0061] As a result, attachment / detachment between the first connecting portion (310) and the fastening portion (220) is possible by rotational manipulation of the first connecting protrusion (313) and the receiving protrusion (223).

[0062] Next, the temperature measurement unit (400) is configured to measure the temperature change of the battery cell (S) located between the first plate (100) and the second plate (200), and includes a temperature sensor (410), a cable (420), and a packing member (430).

[0063] The temperature sensor (410) is a sensor that sequentially passes through the first extension (311) and the through hole (210) of the second plate (200) and measures the temperature of one surface of the battery cell (S) exposed through the through hole (210).

[0064] Here, the temperature sensor (410) is not particularly limited, but a non-contact temperature sensor as well as a contact temperature sensor can be used.

[0065] The cable (420) is connected to the temperature sensor (410) on one end and extended to a certain length, and the other end is connected to the control unit (not shown), so that the temperature value measured by the temperature sensor (410) is transmitted to the control unit (not shown).

[0066] Meanwhile, the packing member (430) has a cylindrical shape with an outer diameter that can be in close contact with the inner surface of the first extension part (311), and can be positioned inside the first extension part (311), and the cable (420) can be arranged to pass through the packing member (430).

[0067] This packing member (430) is intended to minimize changes in the battery cell (S) exposed through the through hole (210) due to external air.

[0068] That is, the packing member (430) seals the inside of the first extension (311) to prevent contact between the battery cell (S) and the outside air, thereby improving the reliability and accuracy of the results by measuring the temperature of the battery cell (S) itself.

[0069] Here, the packing member (430) is preferably made of a material that has insulating performance and a certain degree of elasticity. For example, it may be silicone rubber, but is not limited thereto.

[0070] Fig. 6 is a perspective view showing a battery cell temperature measuring device according to a second embodiment of the present invention, and Fig. 7 is an exploded perspective view of the battery cell temperature measuring device shown in Fig. 6. In addition, Fig. 8 is an enlarged perspective view for explaining the joint structure of a fastening portion and a second connecting portion in the battery cell temperature measuring device shown in Fig. 6, and Fig. 9 is a vertical cross-sectional view showing a portion of a cross-section taken along line BB of Fig. 6.

[0071] Referring to FIGS. 6 to 9, the battery cell temperature measuring device according to the second embodiment of the present invention is identical to the battery cell temperature measuring device according to the first embodiment described in FIGS. 2 to 5 except that it has a plurality of through holes (210) and further includes a second connecting portion (32), and therefore, a description of the same configuration will be omitted.

[0072] In the battery cell temperature measuring device according to the second embodiment, the second plate (200) may be formed with a plurality of through holes (210), and the plurality of through holes (210) may be formed to be spaced apart at a certain interval along the electric field direction. Of course, although not shown in the drawing, the plurality of through holes (210) may also be formed along the electric field direction.

[0073] These multiple through holes (210) are for selectively or simultaneously measuring the temperature of multiple locations of the battery cell (S). In addition, a fastening member (220) having the same structure as described in the first embodiment is formed in each of the multiple through holes (210).

[0074] The second connecting portion (320) performs a kind of cap function that is connected to a connecting portion (220) in which measurement is not performed among the plurality of through holes (210), that is, to which the first connecting portion (310) is not connected.

[0075] That is, when the through hole (210) where temperature measurement is not performed is open, the accuracy of the measurement value may decrease, so it is desirable to block it from the outside air.

[0076] This second connecting portion (320) is configured to include a second extension portion (321), a second flange portion (322), and a second connecting projection (323).

[0077] The second extension part (321) is formed in a cylindrical shape extended to a certain length, and when the second connection part (320) and the fastening part (220) are closely connected to each other, it is inserted into the inside of the second support part (222) so that one edge is in close contact with the inner surface of the through hole (210).

[0078] That is, the outer diameter of the second extension (321) is formed to a size that can be in close contact with the inner diameter of the through hole (210).

[0079] Here, since the second extension (321) must block external air, unlike the first extension (311), one side, the other side, or the entirety of the second extension (321) is sealed.

[0080] The second flange portion (322) is provided to extend horizontally from the outer surface of the second extension portion (321) by a certain length, and can be formed to have the same outer diameter as the outer diameter of the second support portion (222) of the fastening portion (220).

[0081] The second connecting protrusion (323) is provided in a portion of the lower surface of the second flange portion (322) and has a shape bent at a certain angle.

[0082] In other words, the second connecting protrusion (323) may be a structural shape that extends vertically in the direction toward the second support (222) and then extends a certain length in the outer direction of the second extension (321).

[0083] These second connecting protrusions (323) can be formed as a pair facing each other on the lower surface of the second flange portion (322).

[0084] Accordingly, the second connecting protrusion (323) is shaped to interlock with the receiving protrusion (223) of the fastening portion (220), and as the second connecting portion (320) and the fastening portion (220) rotate while in close contact with each other, the second connecting protrusion (323) and the receiving protrusion (223) are fastened, and movement in the vertical direction is restricted.

[0085] As a result, attachment / detachment between the second connecting portion (320) and the fastening portion (220) is possible by rotational manipulation of the second connecting protrusion (323) and the receiving protrusion (223).

[0086] The following describes a method for measuring the temperature of a battery cell using a battery cell temperature measuring device according to the first embodiment having the aforementioned configuration.

[0087] A method for measuring a battery cell temperature comprises a first step of positioning a battery cell between a first plate and a second plate, a second step of fixing the first plate and the second plate, and a third step of connecting a fastening portion provided on the second plate and a first connecting portion, and measuring the temperature of the battery cell with a temperature measuring portion.

[0088] First, the first step of positioning the battery cell between the first plate and the second plate is to secure the battery cell on top of the first plate and then position the second plate on top of the battery cell so that the battery cell is positioned between the first plate and the second plate.

[0089] The second step of fixing the first plate and the second plate is a step of fixing and fixing the battery cell between the first plate and the second plate using a fastening member such as a bolt to the edge of the first plate and the second plate.

[0090] By fixing the first plate and the second plate, the battery cell positioned between the first plate and the second plate is fixed in place and its movement is restricted.

[0091] The third step of connecting the fastening part and the first connecting part provided on the second plate and measuring the temperature of the battery cell with the temperature measuring part is to rotate the first connecting part while keeping it in close contact with the fastening part, so that the receiving projection of the fastening part and the first connecting projection of the first connecting part are interlocked with each other and connected and fixed.

[0092] At this time, the temperature of the battery cell is continuously or discontinuously measured by the temperature measuring unit, and the measured result is transmitted to the control unit.

[0093] Meanwhile, when using the battery cell temperature measuring device according to the second embodiment, the temperature can be measured by connecting the first connecting part to all of the plurality of through holes.

[0094] In addition, if necessary, a second connecting part can be connected and fixed to a through hole among multiple through holes in which the temperature is not measured to seal the through hole.

[0095] Anyone with ordinary skill in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

[0096] (Explanation of symbols)

[0097] 100: First Plate

[0098] 200: Second Plate

[0099] 210: Through hole

[0100] 220: Fastening

[0101] 221: First support 222: Second support

[0102] 223: Receptacle

[0103] 300: Connection

[0104] 310: First connector

[0105] 311: First extension part 312: First flange part

[0106] 313: First connecting protrusion

[0107] 320: Second connector

[0108] 321: Second extension 322: Second flange

[0109] 323: Second connecting protrusion

[0110] 400: Temperature measurement unit

[0111] 410: Temperature sensor

[0112] 420: Cable

[0113] 430: Packing member

[0114] S: Battery cell

Claims

1. A first plate in close contact with one side of the battery cell; A second plate in close contact with the other surface of the battery cell and having one or more through holes formed therein; A connecting portion including a first connecting portion detachably coupled to the above through hole; and A temperature measuring unit that measures the temperature of the battery cell via the connecting unit and the through hole; A battery cell temperature measuring device characterized in that the outer surface of the above through hole is provided with a fastening part that is coupled to the above connecting part.

2. In paragraph 1, The above fastening part includes a first support part having one side fixed to the second plate and extended by a certain length, a second support part having a flange shape provided on the other edge of the first support part, and a receiving protrusion having a shape bent at a certain angle located on the second support part. A battery cell temperature measuring device characterized in that the first connecting portion includes a first extension portion having a cylindrical shape extended by a certain length, a first flange portion provided on an outer surface of the first extension portion, and a first connecting protrusion having a shape bent at a certain angle and connected to the receiving protrusion located on a lower surface of the first flange portion.

3. In paragraph 2, A battery cell temperature measuring device, characterized in that the first connecting part is made of an insulating material.

4. In paragraph 3, A battery cell temperature measuring device, characterized in that the insulating material comprises at least one of bakelite, PVC, Teflon, and silicone rubber.

5. In paragraph 3, A battery cell temperature measuring device characterized in that when the above-mentioned fastening part and the first connecting part are fastened, one edge of the first extension part of the first connecting part is in close contact with the inner surface of the through hole of the second plate.

6. In paragraph 2, A battery cell temperature measuring device characterized in that the temperature measuring unit includes a temperature sensor that is in close contact with one surface of the battery cell, a cable having a predetermined length and connected to the temperature sensor, and a cylindrical packing member having an outer diameter that wraps around the cable and is in close contact with the inner surface of the first extension portion.

7. In paragraph 2, A battery cell temperature measuring device characterized in that the second plate has a plurality of through holes and further includes a second connecting portion for sealing at least one of the plurality of through holes.

8. In paragraph 7, A battery cell temperature measuring device characterized in that the plurality of through holes are formed to be spaced apart at a certain interval along the length direction or width direction of the battery cell.

9. In paragraph 7, The second connecting portion includes a second extension portion having a cylindrical shape extended by a certain length, a second flange portion provided on the outer surface of the second extension portion, and a second connecting protrusion having a shape bent at a certain angle and connected to the receiving protrusion located on the bottom surface of the second flange portion. A battery cell temperature measuring device characterized in that the second extension part has a sealed shape on one or the other side.

10. A battery cell temperature measurement method using a battery cell temperature measurement device described in any one of clauses 1 to 9, A first step of positioning a battery cell between the first plate and the second plate; A second step of fixing the first plate and the second plate; and A battery cell temperature measurement method characterized by comprising a third step of connecting the fastening part and the first connecting part provided on the second plate and measuring the temperature of the battery cell with a temperature measurement part.

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