Battery module having heating function

Abstract

The present invention relates to a battery module having a heating function and, more specifically, to a battery module having a heating function comprising: a plurality of cylindrical battery cells; a first frame having receiving holes formed to receive the plurality of cylindrical battery cells; a second frame having a plurality of predetermined area-cut holes formed on one side surface thereof and coupled to the first frame; a heat conduction pad positioned to cover the plurality of holes inside the second frame; and a storage frame having a space part for accommodating a heating solution and having an operation part for activating the heating solution, wherein a heat conduction part for heat conduction is provided inside the storage frame.

Description

Battery module with heating function

[0001] This application claims the benefit of priority to Korean Patent Application No. 2023-0118914, filed September 7, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a battery module having a heating function, and more particularly, to a battery module having a heating function capable of preventing a situation in which charging is impossible at low temperatures.

[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, secondary batteries do not charge when electricity is supplied below a certain temperature, making it difficult to charge small secondary batteries in winter.

[0006] Fig. 1 is an exploded perspective view showing a battery module according to the prior art. As shown in Fig. 1, the battery module according to the prior art is configured to include a plurality of battery cells (10), a terminal (20) for electrically connecting the plurality of battery cells (10), a holder case (30) for supporting the battery cells (10) from the side, and a module case (40) for storing the aforementioned configuration.

[0007] The battery module according to the prior art does not disclose a configuration having a separate temperature control function capable of measuring and controlling the temperature of the battery cells (10).

[0008] Therefore, when installed in a small device, there may be a problem in that the device cannot be used because charging does not proceed in a low-temperature environment such as winter.

[0009] (Prior art literature)

[0010] (Patent Document 1) Korean Patent Publication No. 2012-0054337

[0011] In order to solve the above problems, the present invention provides a battery module assembly having a fire extinguishing function that can prevent a fire from spreading to a nearby battery module assembly by extinguishing the fire in the battery module assembly when a fire occurs in a battery cell housed inside the battery module assembly, and a battery pack including the same.

[0012] In addition, the present invention aims to provide a battery module assembly having a fire extinguishing function that can reliably discharge air around a battery module and further increase space utilization, and a battery pack including the same.

[0013] In addition, the present invention aims to provide a battery module assembly having a fire extinguishing function and a structure capable of discharging heat generated when the battery module is operating normally, and a battery pack including the same.

[0014] In order to achieve the above object, a battery module equipped with a heating function according to the present invention comprises a first frame (200) having a plurality of cylindrical battery cells (100), a receiving hole (210) in which the plurality of cylindrical battery cells (100) are received, a second frame (300) having a plurality of holes (310) cut to a predetermined area formed on one side thereof and coupled to the first frame (200), a heat-conducting pad (400) positioned on the inside of the second frame (300) to cover the plurality of holes (310), and a receiving frame (500) having a space portion for receiving a heating solution (510) and an operating portion (520) for activating the heating solution (510), and a heat-conducting portion (530) for heat conduction is provided inside the receiving frame (500).

[0015] In addition, in the battery module according to the present invention, the thermal conductive pad (400) is characterized in that a groove (410) is formed at a position corresponding to the cylindrical battery cell (100) in which a part of the cylindrical battery cell (100) can be accommodated.

[0016] In addition, in the battery module according to the present invention, the plurality of holes (310) are characterized in that they are formed at positions corresponding to the groove portion (410).

[0017] In addition, in the battery module according to the present invention, the operating part (520) is characterized by including a vertical part (521) extending inwardly of the storage frame (500) and forming a certain space, a recessed part (522) located at the end of the vertical part (521) and recessed in the direction of the space of the vertical part (521), and a rod-shaped pressing member (523) having one side in close contact with the recessed part (522) and the other side protruding outwardly of the storage frame (500).

[0018] In addition, in the battery module according to the present invention, the pressure member (523) is characterized in that a motion control unit (524) capable of controlling the movement of the pressure member (523) is provided in a portion protruding outward.

[0019] In addition, the battery module according to the present invention is characterized in that it has a switch cap portion (525) that surrounds the outer protruding portion of the pressure member (523).

[0020] In addition, in the battery module according to the present invention, the heat-conducting portion (530) is characterized in that one side thereof is positioned so as to be in close contact with the heat-conducting pad (400) through the plurality of holes (310).

[0021] In addition, in the battery module according to the present invention, the heat-conducting portion (530) is characterized by including a contact portion (531) that is in close contact with the heat-conducting pad (400) and a plurality of extension pin portions (532) that extend inward from the contact portion (531) toward the storage frame (500).

[0022] In addition, in the battery module according to the present invention, it is characterized in that a thermally conductive adhesive material is applied between the thermally conductive pad (400) and the contact portion (531).

[0023] In addition, in the battery module according to the present invention, the outer surface of the storage frame (500) is provided with an indicator (600) indicating whether the operating unit (520) needs to be operated.

[0024] In addition, in the battery module according to the present invention, the display unit (600) is characterized in that it is equipped with a BMS (Battery Management System).

[0025] In addition, in the battery module according to the present invention, the BMS (Battery Management System) is characterized in that it is connected to the operation control unit (524) by a connection unit (610) and is connected to a temperature sensor unit (620) built into the internal space of the storage frame (500).

[0026] In addition, in the battery module according to the present invention, the heating solution (510) is characterized in that it is a supersaturated solution.

[0027] In addition, in the battery module according to the present invention, the supersaturated solution is characterized in that it is a supersaturated sodium acetate aqueous solution.

[0028] As described above, the battery module according to the present invention has the advantage of being equipped with a heating solution, which is a supersaturated solution, so that the battery module can generate heat and create a state in which charging is possible when the temperature is low.

[0029] In addition, the battery module according to the present invention has a heat-conducting pad and a heat-conducting portion, so that heat generated from the heating solution can be more efficiently transferred to the cylindrical battery cell.

[0030] Figure 1 is an exploded perspective view showing a battery module according to the prior art.

[0031] Figure 2 is a perspective view showing a battery module according to a preferred embodiment of the present invention.

[0032] Figure 3 is an exploded perspective view showing a battery module according to a preferred embodiment of the present invention.

[0033] Figure 4 is a cross-sectional view showing a battery module according to a preferred embodiment of the present invention.

[0034] Figure 5 is an exploded perspective view showing a second frame and a thermally conductive pad according to a preferred embodiment of the present invention.

[0035] Fig. 6 is a perspective view showing a battery module before a heat-conducting portion is attached according to a preferred embodiment of the present invention.

[0036] Fig. 7 is a drawing showing the operation of an operating part according to a preferred embodiment of the present invention.

[0037] 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 a detailed description of a related known function or configuration is judged to unnecessarily obscure the gist of the present invention, such detailed description will be omitted.

[0038] 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.

[0039] Hereinafter, a battery module equipped with a heating function according to the present invention will be described with reference to the attached drawings.

[0040] FIG. 2 is a perspective view showing a battery module according to a preferred embodiment of the present invention, FIG. 3 is an exploded perspective view showing a battery module according to a preferred embodiment of the present invention, FIG. 4 is a cross-sectional view showing a battery module according to a preferred embodiment of the present invention, FIG. 5 is an exploded perspective view showing a second frame and a thermally conductive pad according to a preferred embodiment of the present invention, and FIG. 6 is a perspective view showing a battery module according to a preferred embodiment of the present invention before a thermally conductive portion is attached.

[0041] As shown in FIGS. 2 to 6, the battery module according to the present invention is configured to include a cylindrical battery cell (100), a first frame (200), a second frame (300), a thermal conductive pad (400), a storage frame (500), and a display unit (600).

[0042] First, the cylindrical battery cell (100) is configured to include an electrode assembly, a cap assembly, and a cylindrical battery case for storing them.

[0043] The electrode assembly may be a jelly-roll type electrode assembly in which a separator is interposed between long sheet-shaped positive and negative electrodes and then rolled up.

[0044] The positive electrode is composed of a positive electrode current collector and a positive electrode active material applied to the upper and lower surfaces of the positive electrode current collector.

[0045] The positive electrode current collector can generally have a thickness of 3 to 500 μm. There are no particular limitations on the material as long as it has high conductivity and does not cause chemical changes in the battery. For example, stainless steel, aluminum, nickel, titanium, calcined carbon, or aluminum or stainless steel surface-treated with carbon, nickel, titanium, silver, etc. can be used. In addition, in order to increase the adhesive strength of the positive electrode active material, the surface can be formed with fine irregularities, or various shapes such as films, sheets, foils, nets, porous bodies, foams, and non-woven bodies are possible.

[0046] The cathode active material is a layered compound such as lithium cobalt oxide (LiCoO2), lithium nickel oxide (LiNiO2), or a compound substituted with a transition metal of higher order; chemical formula Li 1+x Mn 2-x Lithium manganese oxides such as O4 (where x is 0 to 0.33), LiMnO3, LiMn2O3, LiMnO2; lithium copper oxide (Li2CuO2); vanadium oxides such as LiV3O8, V2O5, Cu2V2O7; chemical formula LiNi 1-x M xNi-site type lithium nickel oxide represented by O2 (where M = Co, Mn, Al, Cu, Fe, Mg, B or Ga and x = 0.01 to 0.3); chemical formula LiMn 2-x M x Lithium manganese complex oxides represented by O2 (where M = Co, Ni, Fe, Cr, Zn, or Ta, and x = 0.01 to 0.1) or Li2Mn3MO8 (where M = Fe, Co, Ni, Cu, or Zn); LiMn2O4 in which some of the Li in the chemical formula is replaced by an alkaline earth metal ion; disulfide compounds; Fe2(MoO4)3, LiNi x Mn 2-x O4(0.01 ≤ x≤ 0.6) etc. can be used.

[0047] Meanwhile, the positive electrode active material may be mixed with a conductive agent and a binder, and fillers may be added as needed.

[0048] The conductive agent is typically added in an amount of 1 to 50 wt% based on the total weight of the mixture including the positive electrode active material. The conductive agent is not particularly limited as long as it has conductivity and does not cause a chemical change in the battery. For example, graphite such as natural graphite or artificial graphite; carbon black such as carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, summer black; conductive fibers such as carbon fiber or metal fiber; metal powders such as fluorocarbon, aluminum, and nickel powder; conductive whiskey such as zinc oxide or potassium titanate; conductive metal oxides such as titanium oxide; and conductive materials such as polyphenylene derivatives can be used.

[0049] A binder is a component that assists in the bonding of the positive electrode active material and the conductive material and the bonding to the current collector, and is typically added in an amount of 1 to 50 wt% based on the total weight of the mixture including the positive electrode active material. Examples of such binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinyl pyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber, fluororubber, and various copolymers.

[0050] The negative electrode is composed of a negative electrode current collector and a negative electrode active material applied to the lower and upper surfaces of the negative electrode current collector.

[0051] The negative electrode current collector is typically made to have a thickness of 3 to 500 μm. There are no particular limitations on the negative electrode current collector as long as it is conductive and does not cause chemical changes in the battery. For example, copper, stainless steel, aluminum, nickel, titanium, calcined carbon, copper or stainless steel surface-treated with carbon, nickel, charcoal, silver, etc., aluminum-cadmium alloy, etc. can be used.

[0052] In addition, the bonding strength of the negative electrode active material can be strengthened by forming fine irregularities on the surface, and it can be used in various forms such as films, sheets, foils, nets, porous bodies, foams, and non-woven fabrics.

[0053] Examples of negative active materials include carbon such as non-graphitizable carbon and graphitic carbon; Li x Fe2O3(0≤x≤1), Li x WO2(0≤x≤1), Sn x Me 1-x Me' y O z(Me: Mn, Fe, Pb, Ge; Me': Al, B, P, Si, elements of group 1, 2, and 3 of the periodic table, halogens; 0 <x≤1; 1≤y≤3; 1≤z≤8) 등의 금속 복합 산화물; 리튬 금속; 리튬 합금; 규소계 합금; 주석계 합금; SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4, Bi2O5등의 금속 산화물; 폴리아세틸렌 등의 도전성 고분자; Li-Co-Ni계 재료; Si, SiO, SiO2단독 또는 이들의 혼합물인 Si계 등을 사용할 수 있으나, 이들만으로 한정되는 것은 아니다.

[0054] Of course, a conductive material and a binder can be additionally mixed with the negative electrode active material and coated on the negative electrode current collector.

[0055] The conductive agent is a component for further improving the conductivity of the negative electrode active material, and may be used in a certain ratio, including carbon black such as acetylene black, Ketjen black, channel black, furnace black, lamp black, and thermal black; conductive fibers such as carbon fiber or metal fiber; metal powders such as fluorinated carbon, aluminum, and nickel powder; conductive whiskey such as zinc oxide or potassium titanate; conductive metal oxides such as titanium oxide; and conductive materials such as polyphenylene derivatives.

[0056] The binder is a component that helps in the binding of the negative electrode active material and the conductive material and the binding to the current collector, and may include at least one selected from the group consisting of styrene butadiene rubber (SBR), acrylonitrile butadiene rubber, acrylic rubber, butyl rubber, fluoro rubber, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinyl alcohol (PVA), polyacrylic acid (PAA), polyethylene glycol (PEG), polyacrylonitrile (PAN), and polyacryl amide (PAM).

[0057] The separator prevents shorting between the aforementioned negative electrode and positive electrode and only allows the movement of lithium ions. The material of the separator is preferably one selected from among polyethylene, polypropylene, polyethylene / polypropylene double layer, polyethylene / polypropylene / polyethylene triple layer, polypropylene / polyethylene / polypropylene triple layer, and organic fiber filter paper, but is not limited thereto.

[0058] The cap assembly is positioned on top of the electrode assembly and is electrically connected to the positive tab of the electrode assembly, and is coupled to the upper open end of the battery case to seal the electrode assembly housed inside the battery case.

[0059] Specifically, the cap assembly comprises a current blocking member, a current blocking gasket, a safety vent, a PTC element, and a top cap sequentially stacked from the bottom, and a crimping gasket is positioned on the outer edges of the current blocking member and the top cap.

[0060] The current interrupting member, also called a CID (Current Interrupt Device), is located on the top of the electrode assembly and has a positive tab connected to a predetermined location on the bottom.

[0061] A safety vent is positioned on the upper portion of the residual blocking member, with its center protruding downward and having one or more first notches. The safety vent interrupts current and exhausts gas when pressure inside the battery case rises. One side of the safety vent is positioned to contact the PTC element and the edge end surface is positioned to contact the crimping gasket.

[0062] A current interrupting gasket is positioned to ensure that the current interrupting member and the safety vent remain electrically insulated, except for the downward protruding portion of the current interrupting member and the safety vent.

[0063] The battery case houses the electrode assembly and the cap assembly, and the negative tab extends downward and is connected to the bottom of the battery case so that the bottom of the battery case body can act as a negative electrode.

[0064] As described above, the cylindrical battery case has a crimping portion provided at the upper end to seal and wrap the outer side of the cap assembly, and an indented beading portion provided below the crimping portion to firmly fix the electrode assembly and the cap assembly while protecting them from external impacts, etc.

[0065] Next, the first frame (200) is intended to protect the cylindrical battery cell (100) from external impacts, etc., and may have a hexahedral shape. A storage hole (210) is formed to store and wrap a portion of the cylindrical battery cell (100).

[0066] The first frame (200) may have a height that can accommodate about half of the cylindrical battery cell (100) when the cylindrical battery cell (100) is stored in the storage hole (210).

[0067] The second frame (300) is intended to protect a portion of the cylindrical battery cell (100) not housed in the first frame (200) from external impact, etc., and may have a hexahedral shape with one side open, and a hole (310) penetrating the second frame (300) may be formed on the other side.

[0068] Here, the first frame (100) and the second frame (200) may be a structure in which they are fastened and fixed using bolts in a close state, and the fastening method is not particularly limited as long as the first frame (100) and the second frame (200) can be fastened in a close state.

[0069] The thermal conductive pad (400) may be located on the inner surface of the surface where the hole (310) of the second frame (300) is formed, and may have a rectangular sheet shape.

[0070] The thermal conductive pad (400) has a receiving groove (410) formed at a position corresponding to the cylindrical battery cell (100) to receive a portion of the cylindrical battery cell (100), and the receiving groove (410) can increase the contact surface area between the thermal conductive pad (400) and the cylindrical battery cell (100), thereby improving thermal conductivity efficiency.

[0071] The thermal conductive pad (400) may be a material having thermal conductivity and electrical insulation, and may include, for example, a silicon-based material. There are no particular limitations on the material as long as it has excellent thermal conductivity and electrical insulation.

[0072] The storage frame (500) has a hexahedral shape with one side open, a space of a certain volume can be formed, and can be configured to include a heating solution (510), an operating part (520), and a heat conducting part (530).

[0073] The heating solution (510) can be stored in the space formed by the storage frame (500) and can be a supersaturated solution.

[0074] An example of a supersaturated solution is a supersaturated aqueous solution of sodium acetate, and when such a supersaturated solution is subjected to shock, a phase change occurs and heat is released.

[0075] In addition, it has the advantage of being recyclable because it emits heat and can return to a supersaturated solution state when heat is applied after the phase change is complete.

[0076] The operating part (520) is formed on one side of the storage frame (500) and is configured to include a vertical part (521), a recessed part (522), a pressure member (523), an operation control part (524), and a switch cap part (525).

[0077] The vertical portion (521) extends toward the inside of the storage frame (500) and forms a space.

[0078] The indentation (522) is located at the end of the extended vertical portion (521) and can be formed in a shape that is indented in the direction of the space formed by the vertical portion (521).

[0079] Here, the vertical portion (521) and the indentation portion (522) may be made of an elastic material.

[0080] The pressurizing member (523) can be positioned in the space of the vertical section (521), and can be provided in a rod shape so that one side is in close contact with the recessed section (522) and the other side protrudes outward from the storage frame (500).

[0081] The motion control unit (524) may be provided to surround the side of the pressure member (523) protruding outside the storage frame (500), and may be positioned so that one side is in close contact with the storage frame (500).

[0082] The motion control unit (524) can fix the pressure member (523) to restrict movement or release the fixed state to allow the pressure member (523) to move according to the received signal.

[0083] For example, the motion control unit (524) may be in the shape of a gripper that wraps around the pressure member (523), and is not particularly limited as long as it has a structure that can fix and release the movement of the pressure member (523).

[0084] The switch cap portion (525) may be composed of a side portion that surrounds the pressure member (523) and the operation control portion (524) exposed to the outside of the storage frame (500) and an upper portion that is connected to one side of the side portion in a hinge manner or the like.

[0085] The upper surface of the switch cap (525) is in close contact with the pressure member (523), so that when the upper surface is pressed, the pressure force can be transmitted to the pressure member (523).

[0086] At this time, the method of connecting the side and upper portions of the switch cap portion (525) is not particularly limited as long as the pressure is transmitted to the pressurizing member (523) when pressurized in a state of being connected to each other, thereby moving the pressurizing member (523).

[0087] The heat conducting portion (530) is for transferring heat generated when the heating solution (510) undergoes a phase change to the cylindrical battery cell (100), and may be configured to include a contact portion (531) and an extension pin portion (532).

[0088] The contact portion (531) is for transferring heat generated when the heating solution (51) undergoes a phase change to the cylindrical battery cell (100), and can be positioned to be in contact with the heat-conducting pad (400) exposed through the hole (310) of the second frame (300).

[0089] The adhesive portion (531) may be in the form of a thin sheet, and may be formed with a horizontal cross-sectional shape corresponding to the hole (310), and it is preferable that the area of ​​the adhesive portion (531) be formed to be less than the area of ​​the hole (310).

[0090] This is because, if the area of ​​the contact portion (531) is formed larger than the area of ​​the hole (310), proper contact between the contact portion (531) and the thermal conductive pad (400) may not be achieved.

[0091] The extension pin portion (532) may be formed by extending from one side of the contact portion (531) toward the space portion of the storage frame (500), and may be in the shape of a plurality of thin pins.

[0092] As described above, the extension fin portion (532) is formed in a thin fin shape in multiple pieces, so that the contact area per unit volume with the heating solution (510) is formed wider, which has the advantage of improving heat exchange efficiency.

[0093] Next, the display unit (600) is provided on the outer surface of the storage frame (500), and may be formed in a structure in which a portion is stored in the storage frame (500) as needed, and the display unit (600) may be provided with a BMS (Battery Management System).

[0094] The display unit (600) can display whether the battery module requires heating and whether the operating unit (520) requires operation. For example, it can be a display capable of displaying letters, and can further include a connection unit (610) and a temperature sensor (620).

[0095] The connecting portion (610) connects the display portion (600) and the motion control portion (524) so ​​that an electrical signal can be transmitted, thereby enabling the movement of the pressure member (523) to be controlled through the motion control portion (524).

[0096] The temperature sensor (620) extends from the display unit (600) and measures the temperature of the heating solution (510) stored inside the storage frame (500) to provide a measurement value that is taken into consideration when indicating whether the operating unit (520) is operating on the display unit (600).

[0097] As an example, the display unit (600) may indicate that the operation unit (520) does not need to be operated when the temperature of the cylindrical battery cell (100) is below a reference value and the temperature of the heating solution (510) through the temperature sensor (620) is high.

[0098] At this time, the reference value may be 5℃, which is the minimum temperature at which charging can be performed, and more preferably, it may be 15℃, at which smooth charging can be performed.

[0099] In addition, the display unit (600) may indicate that the operation unit (520) needs to be operated when the temperature of the cylindrical battery cell (100) is below a reference value and the temperature of the heating solution (510) through the temperature sensor (620) is low.

[0100] Fig. 7 is a drawing showing the operation of an operating part according to a preferred embodiment of the present invention.

[0101] Referring to FIGS. 2 to 6, the operation of the operating unit (520) is explained. FIG. 7(a) shows that when the display unit (600) is displayed as not requiring operation, the operating control unit (524) maintains the pressure member (523) in a fixed state.

[0102] When the temperature of the cylindrical battery cell (100) is measured to be below the reference value and the heating solution (510) is at a low temperature, the display unit (600) indicates that operation is required, and at this time, the operation control unit (524) releases the fixed state of the pressurizing member (523) so that the pressurizing member (523) can move.

[0103] Here, the switch cap portion (525) is pressed, causing the pressurizing member (523) to descend, which causes the indentation portion (522) to expand, generating an impact and causing the heating solution (510) to undergo a phase change, thereby generating heat.

[0104] Fig. 7(c) shows that after the pressure applied to the switch cap portion (525) is released, the elastic properties of the vertical portion (521) and the indentation portion (522) return to the pre-pressurization position, thereby applying an additional elastic shock to the heating solution (510), thereby causing a phase change of the heating solution (510).

[0105] 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.

[0106] (Explanation of symbols)

[0107] 100: Cylindrical battery cell

[0108] 200: First frame

[0109] 210: Storage Hall

[0110] 300: Second frame

[0111] 310: Hall

[0112] 400: Thermal pad

[0113] 410: Home

[0114] 500: Storage Frame

[0115] 510: Fever solution

[0116] 520: Operating part

[0117] 521: Vertical section 522: Indentation section

[0118] 523: Pressurized member 524: Motion control unit

[0119] 525: Switch cap

[0120] 530: Heat conducting part

[0121] 531: Adhesive part 532: Extension pin part

[0122] 600: Display

[0123] 610: Connector

[0124] 620: Temperature sensor section

Claims

1. A plurality of cylindrical battery cells; A first frame having a storage hole formed therein in which the plurality of cylindrical battery cells are stored; A second frame having a plurality of holes cut to a certain area formed on one side and combined with the first frame; A thermally conductive pad positioned to cover the plurality of holes on the inner side of the second frame; and It includes a storage frame that forms a space for accommodating a heating solution and has an operating part for activating the heating solution. A battery module characterized in that a heat conducting portion for heat conduction is provided inside the above storage frame.

2. In paragraph 1, A battery module characterized in that the thermal conductive pad has a groove formed at a position corresponding to the cylindrical battery cell in which a portion of the cylindrical battery cell can be accommodated.

3. In paragraph 2, A battery module characterized in that the plurality of holes are formed at positions corresponding to the groove portion.

4. In paragraph 1, A battery module characterized in that the operating part includes a vertical part extending inwardly of the storage frame and forming a predetermined space, a recessed part located at an end of the vertical part and recessed in the direction of the space of the vertical part, and a bar-shaped pressing member having one side in close contact with the recessed part and the other side protruding outwardly of the storage frame.

5. In paragraph 4, A battery module characterized in that the above-mentioned pressure member has a motion control unit that can control the movement of the pressure member in a portion protruding outward.

6. In paragraph 4, A battery module characterized in that it has a switch cap portion that covers a portion protruding outwardly of the above-mentioned pressure member.

7. In paragraph 2, A battery module characterized in that the heat-conducting portion is positioned so that one side thereof is in close contact with the heat-conducting pad through the plurality of holes.

8. In paragraph 7, A battery module characterized in that the heat-conducting portion includes a contact portion that is in close contact with the heat-conducting pad and a plurality of extension pin portions extending inward from the contact portion toward the inside of the storage frame.

9. In paragraph 8, A battery module characterized in that a thermally conductive adhesive material is applied between the thermally conductive pad and the contact portion.

10. In paragraph 5, A battery module characterized in that an indicator is provided on the outer surface of the storage frame to indicate whether the operating part needs to be operated.

11. In paragraph 10, A battery module characterized in that the above display unit is equipped with a BMS (Battery Management System).

12. In paragraph 11, The above BMS (Battery Management System) is connected to the above operation control unit and connection unit, A battery module characterized in that it is connected to a temperature sensor unit built into the internal space of the storage frame.

13. In paragraph 1, A battery module characterized in that the above-mentioned heating solution is a supersaturated solution.

14. In paragraph 13, A battery module characterized in that the above supersaturated solution is a supersaturated sodium acetate aqueous solution.

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