Battery pack fire extinguisher

Abstract

Provided is a battery pack fire extinguisher, and the battery pack fire extinguisher according to an embodiment of the present invention comprises: a plurality of battery cells; a bottom case accommodating the battery cells; a top case coupled to the bottom case, having a seating recess, and having a flame-guide portion on the periphery side of the seating recess; and a fire extinguishing patch attached to the seating recess.

Description

Battery pack fire extinguisher

[0001] The present invention relates to a battery pack fire extinguishing device, and more particularly, to a battery pack fire extinguishing device using a fire extinguishing agent.

[0002] Currently, electric vehicles on sale and in operation are installing a barrier around the vehicle that caught fire and then filling it with water to cool the battery in which the event occurred, in order to extinguish the fire in case of a fire due to an accident or battery failure.

[0003] This makes early extinguishing efforts difficult before fire trucks arrive, and extinguishing a battery fire requires significant time and a large amount of water. Furthermore, because the fire extinguishing water is sprayed from the outside of the electric vehicle, the extinguishing efficiency is also very low.

[0004] Electric vehicles and energy storage systems contain battery packs. If a fire breaks out in one battery pack during operation, the flames must be extinguished to prevent the fire from spreading to other nearby batteries.

[0005] One embodiment of the present invention provides a battery pack fire extinguishing device that prevents fire by blocking flames from spreading to surrounding battery cells when a fire occurs in one battery cell.

[0006] One embodiment of the present invention provides a battery pack fire extinguishing device that effectively induces ignition of a fire extinguishing agent by directly inducing a flame to a fire extinguishing agent having a built-in fire extinguishing function.

[0007] A battery pack fire extinguishing device according to one embodiment of the present invention includes a plurality of battery cells, a bottom case accommodating the battery cells, a top case coupled to the bottom case and having a mounting groove and having a flame induction part on the periphery of the mounting groove, and a fire extinguishing patch attached to the mounting groove and containing a fire extinguishing agent.

[0008] The above battery cells can be formed into a cylindrical secondary battery.

[0009] The above digestive patch can be attached to the above mounting groove with double-sided tape.

[0010] The above double-sided tape may be formed of a PET film to quickly reach a temperature that ignites the fire extinguishing agent.

[0011] The above-mentioned settling grooves can be formed corresponding to a plurality of battery cells so that the fire extinguishing patch can be responsible for extinguishing fires in the plurality of battery cells.

[0012] The side surface of the above digestive patch and the corresponding inner surface of the above fixing groove can form a gap (G) between each other.

[0013] The above digestive patch has a thickness (t) smaller than the depth (D) of the above mounting groove, and may have a height difference (h) with the inner surface of the top case when attached to the above mounting groove.

[0014] The above-mentioned anchoring groove can be formed by forming the ceiling into a plane and connecting the inner surface at a right angle to the plane.

[0015] The above flame induction part is formed on the inner surface of the mounting groove connected perpendicularly to the inner surface of the top case, and can induce flame to the side of the fire extinguishing patch through the gap (G) between the side of the fire extinguishing patch and the corresponding inner surface of the mounting groove.

[0016] The side surface of the above digestive patch and the corresponding inner surface of the above fixing groove form a gap (G2) between them, and the gap (G2) may be formed at a maximum on the battery cell side and may narrow toward the ceiling of the above fixing groove.

[0017] The above digestive patch has a thickness (t) smaller than the depth (D2) of the above mounting groove, and may have a height difference (h2) with the inner surface of the top case when attached to the above mounting groove.

[0018] The above-mentioned anchoring groove can be formed by forming the ceiling in a flat plane and connecting the inner surface to the ceiling at an angle of inclination (θ).

[0019] The above flame induction part is formed on the inner surface of the mounting groove connected to the inner surface of the top case at an angle of inclination (θ), and can induce flame to the side of the fire extinguishing patch through the gap (G2) between the side of the fire extinguishing patch and the corresponding inner surface of the mounting groove.

[0020] The first side of the above-mentioned digestive patch and the corresponding first inner side of the above-mentioned fixing groove form a first gap (G31) and a second gap (G32) between each other by the step structure of the first inner side, and the first gap (G31) is formed at a maximum on the battery cell side, and the second gap (G32) is formed at a minimum on the ceiling side of the above-mentioned fixing groove, and the second side of the above-mentioned digestive patch and the corresponding second inner side of the above-mentioned fixing groove can form a gap (G) between each other.

[0021] The above fire extinguishing patch has a thickness (t) smaller than the depth (D3) of the mounting groove, has a height difference (h3) with the inner surface of the top case when attached to the mounting groove, and the flame induction portion is formed as a first inner surface of the mounting groove connected to the inner surface of the top case in a step structure of the first inner surface, so that a flame can be induced to the first side of the fire extinguishing patch through a first gap (G31) and a second gap (G32) between the first side of the fire extinguishing patch and the corresponding first inner surface of the mounting groove.

[0022] The side surface of the above-mentioned digestive patch and the corresponding inner surface of the above-mentioned fixing groove form a first gap (G51), a second gap (G52), and a third cap (G53) by the two ends of the round structure of the inner surface between each other, and the first gap (G51) is formed to a maximum on the battery cell side, the second gap (G52) is formed to a minimum on the ceiling side of the above-mentioned fixing groove, and the third gap (G53) can be gradually widened toward the middle between each of the battery cell side and the above-mentioned fixing groove.

[0023] The above fire extinguishing patch has a thickness (t) smaller than the depth (D5) of the mounting groove, has a height difference (h5) with the inner surface of the top case when attached to the mounting groove, and the flame induction portion is formed on the inner surface of the mounting groove connected to the inner surface of the top case by a round structure of the inner surface, so that a flame can be induced to the side of the fire extinguishing patch through a first gap (G51), a second gap (G52), and a third gap (G53) between the side surface of the fire extinguishing patch and the corresponding inner surface of the mounting groove.

[0024] The above-mentioned digestive patch is placed in the above-mentioned mounting groove, and the above-mentioned digestive patch and the inner surface of the above-mentioned top case can be attached with a patch tape.

[0025] The above-mentioned digestive patch has a thickness (t) equal to the depth (D6) of the above-mentioned fixing groove, and the above-mentioned patch tape can be attached to the above-mentioned digestive patch and the inner surface of the above-mentioned top case in a flat state.

[0026] The distance (D20) between the above-mentioned digestive patch and the above-mentioned battery cell can be set to 3 to 6 times the thickness (t) of the above-mentioned digestive patch (D20=3 to 6*t).

[0027] In one embodiment, a fire extinguishing patch having a built-in fire extinguishing agent is attached to a mounting groove of a top case, so that when a fire occurs in one of a plurality of battery cells, the flame is prevented from spreading to surrounding battery cells, thereby preventing a fire.

[0028] One embodiment utilizes a flame induction unit installed in the top case to directly induce flames into a fire extinguishing agent with a built-in fire extinguishing function, effectively inducing ignition of the fire extinguishing agent. Consequently, the fire extinguishing agent is quickly ignited and combusted, quickly preventing flames generated in a battery cell from spreading to surrounding battery cells.

[0029] FIG. 1 is a plan view of a battery pack extinguishing device according to a first embodiment of the present invention.

[0030] Figure 2 is a cross-sectional view taken along line II-II of Figure 1.

[0031] Fig. 3 is a cross-sectional view showing the relationship between the anchoring groove and the digestive patch in Fig. 2 in an enlarged manner.

[0032] FIG. 4 is a cross-sectional view showing the relationship between a mounting groove and a fire extinguishing patch in a battery pack fire extinguishing device according to a second embodiment of the present invention.

[0033] FIG. 5 is a cross-sectional view showing the relationship between a mounting groove and a fire extinguishing patch in a battery pack fire extinguishing device according to a third embodiment of the present invention.

[0034] FIG. 6 is a cross-sectional view showing the relationship between the mounting groove and the fire extinguishing patch in a battery pack fire extinguishing device according to a fourth embodiment of the present invention.

[0035] FIG. 7 is a cross-sectional view showing the relationship between the mounting groove and the fire extinguishing patch in a battery pack fire extinguishing device according to the fifth embodiment of the present invention.

[0036] FIG. 8 is a cross-sectional view showing the relationship between a mounting groove and a fire extinguishing patch in a battery pack fire extinguishing device according to a sixth embodiment of the present invention.

[0037] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description have been omitted to clearly explain the present invention, and the same reference numerals have been used throughout the specification to refer to identical or similar components.

[0038] When a fire breaks out in a battery cell in a battery pack equipped with recovery battery cells, a fire extinguishing patch containing a built-in fire extinguishing agent is used to extinguish the flame and prevent it from spreading to other battery cells within the pack. The fire extinguishing patch eliminates the flames caused by the fire in the battery pack. The fire extinguishing patch, built into the battery pack, aims to extinguish the flame as quickly as possible, preventing the spread of the fire.

[0039] Battery packs can utilize pouch-shaped, square, or circular battery cells. The following examples illustrate a battery pack utilizing circular battery cells. To prevent chain reactions among battery cells, the battery pack utilizes a fire extinguishing patch encapsulating a fire extinguishing agent.

[0040] The fire extinguishing patch is installed above the battery cell, which is the source of the ignition, with a structure that takes into account the operational characteristics of the fire extinguishing capsule. The fire extinguishing patch is designed to generate smoke by burning the ignited battery cell, which then extinguishes the flames.

[0041] FIG. 1 is a plan view of a battery pack fire extinguishing device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1. Referring to FIGS. 1 and 2, the battery pack fire extinguishing device (1) of the first embodiment includes a plurality of battery cells (10), a bottom case (20) that accommodates the battery cells (10), a top case (30) that is coupled to the bottom case (20) and has a mounting groove (31) and has a flame induction part (33) on the outside of the mounting groove (31), and a fire extinguishing patch (40) that is attached to the mounting groove (31) and contains a fire extinguishing agent.

[0042] As an example, the battery cell (10) is formed as a cylindrical secondary battery. The first embodiment exemplifies a configuration in which seven battery cells (10) are provided with one fire extinguishing patch (40). When seven battery cells (10) and one fire extinguishing patch (40) are formed as a unit pack (UP), the first embodiment exemplifies a configuration including one unit pack (UP). However, the battery pack fire extinguishing device (1) can be formed by repeatedly arranging the unit packs (UP) in the vertical direction and left and right directions of FIG. 1 according to the required capacity.

[0043] Fig. 3 is an enlarged cross-sectional view illustrating the relationship between the mounting groove and the fire extinguishing patch in Fig. 2. Referring to Figs. 2 and 3, the fire extinguishing patch (40) is attached to the mounting groove (31) using a double-sided tape (41). In one embodiment, the double-sided tape (41) may be formed of a PET film to quickly reach a temperature that ignites the fire extinguishing agent.

[0044] The temperature required to ignite the fire extinguishing agent is 380-400°C, and may also be 390°C. Since PET film has excellent thermal conductivity, it quickly transfers the temperature of the ignited flame to the fire extinguishing patch (40), thereby quickly bringing the temperature of the fire extinguishing agent to the ignition temperature. In other words, the fire extinguishing patch (40) can be activated for combustion at the initial stage of ignition.

[0045] The mounting grooves (31) are formed corresponding to a plurality of battery cells (10) so that the fire extinguishing patches (40) can take charge of the fire of the plurality of battery cells (10). In the first embodiment, one fire extinguishing patch (40) is provided in one mounting groove (31), and one fire extinguishing patch (40) is provided corresponding to seven cylindrical secondary batteries (see Fig. 1).

[0046] The side surface (42) of the digestive patch (40) and the corresponding inner surface (311) of the mounting groove (31) form a gap (G) between them. The digestive patch (40) has a thickness (t) smaller than the depth (D) of the mounting groove (31), and has a height difference (h) with the inner surface (302) of the top case (30) when attached to the mounting groove (31).

[0047] The mounting groove (31) forms a ceiling (312) in a flat shape, and connects the inner side (311) to the ceiling (312) at a right angle, thereby forming the inner side (311) and the ceiling (312). In addition, the mounting groove (31) is open toward the battery cells (10) through the inner side (311).

[0048] The flame induction unit (33) is formed by the inner surface (311) of the mounting groove (31) which is connected perpendicularly to the inner surface (302) of the top case (30). This flame induction unit (33) directly induces flame to the side surface (42) of the fire extinguishing patch (40) through the gap (G) between the side surface (42) of the fire extinguishing patch (40) and the corresponding inner surface (311) of the mounting groove (31). In addition, the flame generated from the battery cell (10) may directly reach the lower surface of the fire extinguishing patch (40).

[0049] At this time, the distance (D20) between the fire extinguishing patch (40) and the battery cell (10) can be set to 3 to 6 times the thickness (t) of the fire extinguishing patch (40) (D20=3 to 6*t). For example, the thickness (t) of the fire extinguishing patch (40) is 2.0 to 3.0 mm, and the distance (D20) is 5.0 to 6.0 mm.

[0050] When the separation distance (D20) is less than 5.0 mm, the time it takes for the flame generated from the battery cells (10) to reach the fire extinguishing patch (40) is short, so combustion of the fire extinguishing agent occurs quickly, but the large amount of smoke acting as an extinguishing agent makes it difficult to quickly extinguish the flame of the battery cells (10) that are relatively far from the fire extinguishing patch (40).

[0051] When the separation distance (D20) exceeds 6.0 mm, the time it takes for the flame generated from the battery cells (10) to reach the fire extinguishing patch (40) is delayed, so the start of combustion of the fire extinguishing agent is delayed, and as a result, the time until sufficient fire extinguishing smoke is generated to extinguish the flame of the battery cells (10) is delayed.

[0052] For example, if the distance (D30) between the battery cell (10) and the inner surface (302) of the top case (30) is 7.0 mm, the thickness (t) of the fire extinguishing patch (40) is 2 mm, the depth (D) of the mounting groove (31) is 1 mm, and the thickness (t2) of the double-sided tape (41) is 0.3 mm, the separation distance (D2) between the fire extinguishing patch (40) and the battery cell (10) becomes 5.7 mm according to the equation (D3 + D - t - t2 = 7.0 + 1 -2 - 0.3 = 5.7 mm).

[0053] In this case, the flame generated from the battery cells (10) reaches the fire extinguishing patch (40) at an appropriate time, so that the fire extinguishing agent is combusted within an appropriate time, and a large amount of smoke acting as an extinguishing agent can also extinguish flames in battery cells (10) located relatively far from the fire extinguishing patch (40).

[0054] Hereinafter, various embodiments of the present invention will be described. Compared to the first embodiment, descriptions of the same parts will be omitted, and descriptions of the different parts will be provided.

[0055] Fig. 4 is a cross-sectional view illustrating the relationship between a mounting groove and a fire extinguishing patch in a battery pack fire extinguishing device according to a second embodiment of the present invention. Referring to Fig. 4, in the battery pack fire extinguishing device (2) of the second embodiment, the side surface (42) of the fire extinguishing patch (40) and the corresponding inner surface (321) of the mounting groove (32) form a gap (G2) therebetween.

[0056] The gap (G2) is formed to the maximum on the battery cell (10) side (lower side of FIG. 4) and becomes narrower as it goes toward the ceiling (322) of the mounting groove (32). The fire extinguishing patch (40) has a thickness (t) smaller than the depth (D2) of the mounting groove (32), and has a height difference (h2) with the inner surface (303) of the top case (230) when attached to the mounting groove (32).

[0057] The mounting groove (32) is formed by forming the ceiling (322) in a flat plane and connecting the inner side (321) to the ceiling (322) at an angle of inclination (θ). In addition, the mounting groove (32) is open toward the battery cells (10) through the inner side (321).

[0058] The flame induction unit (34) is formed by the inner surface (321) of the mounting groove (32) which is connected to the inner surface (303) of the top case (230) at an angle (θ). The flame induction unit (34) directly induces flame to the side surface (42) of the fire extinguishing patch (40) through the gap (G2) between the side surface (42) of the fire extinguishing patch (40) and the corresponding inner surface (321) of the mounting groove (32). In addition, the flame generated from the battery cell (10) may directly reach the lower surface of the fire extinguishing patch (40).

[0059] The flame induction part (34) has an area opened toward the battery cells (10) on the inner surface (303) of the case (230) due to the inclination angle (θ) larger than the area opened toward the battery cells (10) on the inner surface (302) of the case (30) of the flame induction part (33) of the first embodiment.

[0060] In this case, the flame generated from the battery cells (10) reaches the fire extinguishing patch (40) more effectively than the flame induction unit (33) of the first embodiment by the flame induction unit (34), and the large amount of smoke that acts as an extinguishing agent can more effectively extinguish flames in the battery cells (10) that are relatively far from the fire extinguishing patch (40).

[0061] FIG. 5 is a cross-sectional view showing the relationship between a mounting groove and a fire extinguishing patch in a battery pack fire extinguishing device according to a third embodiment of the present invention, and FIG. 6 is a cross-sectional view showing the relationship between a mounting groove and a fire extinguishing patch in a battery pack fire extinguishing device according to a fourth embodiment of the present invention.

[0062] Referring to FIGS. 5 and 6, the battery pack extinguishing device (3) of the third embodiment and the battery pack extinguishing device (4) of the fourth embodiment have a left-right symmetrical structure when viewed in the drawings. Therefore, the second and third embodiments will be described together.

[0063] In the battery pack fire extinguishing device (3, 4) of the third and fourth embodiments, the first side (421) of the fire extinguishing patch (40) and the corresponding first inner side (351, 361) of the mounting groove (35, 36) form a first gap (G31) and a second gap (G32) between each other by the step structure of the first inner side (351, 361). The first gap (G31) is formed to a maximum on the battery cell (10) side, and the second gap (G32) is formed to a minimum on the ceiling (352, 362) side of the mounting groove (35, 36).

[0064] The second side (422) of the digestive patch (40) and the corresponding second inner side (353, 363) of the mounting groove (35, 36) form a gap (G) between them. The mounting grooves (35, 36) are asymmetrical from left to right. That is, the mounting grooves (35, 36) are formed in a step structure of the first inner side (351, 361), and the second inner side (353, 363) is formed in a straight structure.

[0065] The digestive patch (40) has a thickness (t) smaller than the depth (D3) of the mounting groove (35, 36), and has a height difference (h3) with the inner surface (304, 305) of the top case (330, 430) when attached to the mounting groove (35, 36).

[0066] The mounting grooves (35, 36) are formed by forming the ceiling (352, 362) in a flat plane, connecting the first inner side (351, 361) to the ceiling (352, 362) in a step structure, and connecting the second inner side (422) to the ceiling (352, 362) at a right angle. In addition, the mounting grooves (35, 36) are open toward the battery cells (10) through the first inner side (351, 361) and the second inner side (422).

[0067] The flame guide portion (37, 38) is formed by the first inner surface (351, 361) of the mounting groove (35, 36) which is connected to the inner surface (304, 305) of the top case (330, 430) in a step structure of the first inner surface (351, 361). The flame guide portion (37, 38) guides the flame to the first side surface (421) of the fire extinguishing patch (40) through the first gap (G31) and the second gap (G32) between the first side surface (421) of the fire extinguishing patch (40) and the corresponding first inner surface (351, 361) of the mounting groove (35, 36).

[0068] The flame induction unit (371, 381) is formed by the second inner surface (352, 362) of the mounting groove (35, 36) which is connected to the inner surface (304, 305) of the top case (330, 430) in a straight structure of the second inner surface (352, 362). The flame induction unit (371, 381) induces the flame to the second side surface (422) of the fire extinguishing patch (40) through the gap (G) between the second side surface (422) of the fire extinguishing patch (40) and the corresponding second inner surface (352, 362) of the mounting groove (35, 36).

[0069] Additionally, the flame generated from the battery cell (10) may reach the lower surface of the fire extinguishing patch (40).

[0070] The flame induction unit (37, 38) has a larger area opened toward the battery cells (10) from the inner surface (304, 305) of the case (330, 430) due to the step structure of the first inner side (351, 361) than the area opened toward the battery cells (10) from the inner surface (302) of the case (30) of the flame induction unit (33) of the first embodiment.

[0071] The flame induction parts (37, 38) of the third and fourth embodiments are provided with a step structure of the first inner side (351, 361) tilted to the left or right with respect to the fire extinguishing patch (40), so that they can be selectively used when it is necessary to more effectively induce flames from the left or right and more effectively send out fire extinguishing smoke.

[0072] As illustrated in Fig. 1, when the fire extinguishing patch (40) has a circular shape, in the third and fourth embodiments, the first inner side (351, 361) may be formed to cover half of the entire circumference or a required area. The flame may be induced from the battery cell (10) within the area of ​​the first inner side (351, 361) and the fire extinguishing smoke may be sent to the ignited battery cell (10).

[0073] Fig. 7 is a cross-sectional view illustrating the relationship between a mounting groove and a fire extinguishing patch in a battery pack fire extinguishing device according to a fifth embodiment of the present invention. Referring to Fig. 7, in the battery pack fire extinguishing device (5) of the fifth embodiment, the side surface (42) of the fire extinguishing patch (40) and the corresponding inner surface (521) of the mounting groove (52) form a first gap (G51) and a second gap (G52) between the two ends of the round structure of the inner surface (521), and a third cap (G53) between the two ends.

[0074] The first gap (G51) is formed to the maximum on the battery cell (10) side, the second gap (G52) is formed to the minimum on the ceiling (522) side of the mounting groove (52), and the third gap (G53) gradually widens toward the middle between the battery cell (10) side and the mounting groove (52), respectively. The fire extinguishing patch (40) has a thickness (t) smaller than the depth (D5) of the mounting groove (52), and has a height difference (h5) with the inner surface (503) of the top case (530) when attached to the mounting groove (52).

[0075] The flame induction unit (56) is formed by the inner surface (521) of the mounting groove (52) which is connected to the inner surface (503) of the top case (530) in a round structure of the inner surface (521). The flame induction unit (56) induces flame to the side surface (42) of the fire extinguishing patch (40) through the first gap (G51), the second gap (G52), and the third gap (G53) between the side surface (42) of the fire extinguishing patch (40) and the corresponding inner surface (521) of the mounting groove (52). In addition, the flame generated from the battery cell (10) may directly reach the lower surface of the fire extinguishing patch (40).

[0076] The flame induction unit (56) has a round structure, so that the area opened toward the battery cells (10) from the inner surface (503) of the case (530) is larger than the area opened toward the battery cells (10) from the inner surface (302) of the case (30) of the flame induction unit (33) of the first embodiment. The round structure can further induce flames.

[0077] In this case, more flames generated from the battery cells (10) reach the fire extinguishing patch (40) than the flame extinguishing unit (33) of the first embodiment due to the flame extinguishing unit (56), and a large amount of smoke acting to extinguish the flames of the battery cells (10) located relatively far from the fire extinguishing patch (40) can also extinguish more flames.

[0078] Fig. 8 is a cross-sectional view illustrating the relationship between a mounting groove and a fire extinguishing patch in a battery pack fire extinguishing device according to a sixth embodiment of the present invention. Referring to Fig. 8, in the battery pack fire extinguishing device (6) of the sixth embodiment, a fire extinguishing patch (40) is placed in a mounting groove (53), and the fire extinguishing patch (40) and the inner surface (602) of the top case (630) are attached with a patch tape (61).

[0079] The digestive patch (40) has a thickness (t) equal to the depth (D6) of the mounting groove (53), and the patch tape (61) is attached to the inner surface (602) of the digestive patch (40) and the top case (630) in a flat state.

[0080] In this case, the temperature required to ignite the fire extinguishing agent embedded in the fire extinguishing patch (40) is 380 to 400°C. The patch tape (61) may be formed of a PET film with excellent thermal conductivity. Therefore, the patch tape (61) is heated by the flame generated by the ignition of the battery cell (10), thereby quickly bringing the temperature of the fire extinguishing agent to the ignition temperature.

[0081] Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the claims, the description of the invention, and the attached drawings, and it is obvious that this also falls within the scope of the present invention.

[0082] - Explanation of symbols -

[0083] 1, 2: Battery pack extinguishing device 3, 4: Battery pack extinguishing device

[0084] 5, 6: Battery pack extinguishing device 10: Battery cell

[0085] 20: Bottom case 30: Top case

[0086] 31, 32: Fixing groove 33, 34: Flame induction part

[0087] 35, 36: Fixing groove 37, 38: Flame induction part

[0088] 40: Digestive patch 41: Double-sided tape

[0089] 52, 53: Mounting groove 56: Flame induction part

[0090] 61: Patch tape 302, 303: Inner surface

[0091] 304, 305: Inner surface 311, 321, 521: Inner side

[0092] 312, 322: Ceiling 351, 361: First inner side

[0093] 330, 430: Top case 352, 362: Ceiling

[0094] 353, 363: Second inner side 371, 381: Flame induction part

[0095] 421, 422: first and second sides 503: inner surface

[0096] 522: Ceiling 530: Top Case

[0097] 602: Inner surface 630: Top case

[0098] D, D2, D3: Depth D5: Depth

[0099] D20, D30: Distance G, G2: Gap

[0100] G31: 1st gap G32: 2nd gap

[0101] G51: 1st gap G52: 2nd gap

[0102] G53: 3rd cap h: height

[0103] h2, h3, h5: height difference t: thickness

[0104] UP: unit pack θ: incline angle

Claims

1. Multiple battery cells; A bottom case accommodating the above battery cells; A top case coupled to the bottom case and having a mounting groove and a flame induction part on the periphery of the mounting groove; and A fire extinguishing patch attached to the above-mentioned mounting groove and containing a fire extinguishing agent Battery pack extinguishing device including.

2. In paragraph 1, A battery pack extinguishing device, wherein the above battery cells are formed as cylindrical secondary batteries.

3. In paragraph 1, A battery pack extinguishing device, wherein the above-mentioned extinguishing patch is attached to the above-mentioned mounting groove with double-sided tape.

4. In paragraph 3, The above double-sided tape A battery pack extinguishing device formed of PET film to quickly reach a temperature that ignites the above extinguishing agent.

5. In paragraph 1, The above anchoring home A battery pack fire extinguishing device, wherein the fire extinguishing patches are formed corresponding to a plurality of battery cells to take charge of fires in the plurality of battery cells.

6. In paragraph 1, The side surface of the above digestive patch and the corresponding inner surface of the above fixing groove A battery pack extinguisher that creates a gap between them.

7. In paragraph 6, The above digestive patch A battery pack extinguishing device having a thickness smaller than the depth of the above-mentioned mounting groove and having a height difference with the inner surface of the top case while attached to the above-mentioned mounting groove.

8. In paragraph 1, The above anchoring home A battery pack extinguishing device formed by forming a ceiling in a flat shape and connecting the inner side surface at a right angle to the ceiling.

9. In paragraph 8, The above flame induction part It is formed on the inner side of the above-mentioned mounting groove which is connected perpendicularly to the inner surface of the above-mentioned top case, A battery pack extinguishing device that directs flame to the side of the extinguishing patch through a gap between the side of the extinguishing patch and the corresponding inner side of the mounting groove.

10. In paragraph 1, The side surface of the above digestive patch and the corresponding inner surface of the above fixing groove Creating a gap between each other, A battery pack extinguishing device, wherein the gap is formed to a maximum on the battery cell side and narrows toward the ceiling of the mounting groove.

11. In paragraph 10, The above digestive patch A battery pack extinguishing device having a thickness smaller than the depth of the above-mentioned mounting groove and having a height difference with the inner surface of the top case while attached to the above-mentioned mounting groove.

12. In paragraph 1, The above anchoring home A battery pack extinguishing device formed by forming a ceiling in a flat shape and connecting the inner side surface to the ceiling at an angle.

13. In paragraph 12, The above flame induction part It is formed on the inner side of the above-mentioned mounting groove which is connected at an angle to the inner surface of the above-mentioned top case, A battery pack extinguishing device that directs flame to the side of the extinguishing patch through a gap between the side of the extinguishing patch and the corresponding inner side of the mounting groove.

14. In paragraph 1, The first side of the above digestive patch and the corresponding first inner side of the above fixing groove A first gap and a second gap are formed by the step structure of the first inner side between each other, The above first gap is formed to a maximum on the battery cell side, The above second gap is formed at a minimum on the ceiling side of the above-mentioned fixing groove, The second side of the above digestive patch and the corresponding second inner side of the above fixing groove A battery pack extinguisher that creates a gap between them.

15. In paragraph 14, The above digestive patch It has a thickness smaller than the depth of the above-mentioned fixing groove, and has a height difference with the inner surface of the top case while attached to the above-mentioned fixing groove. The above flame induction part The first inner side of the fixing groove is formed as a step structure connected to the inner surface of the top case, A battery pack fire extinguishing device that induces flame to the first side of the fire extinguishing patch through the first gap and the second gap between the first side of the fire extinguishing patch and the corresponding first inner side of the mounting groove.

16. In paragraph 1, The side surface of the above digestive patch and the corresponding inner surface of the above fixing groove The first gap and the second gap are formed by the two ends of the round structure on the inner side between each other, The above first gap is formed to a maximum on the battery cell side, A battery pack extinguishing device, wherein the second gap is formed at a minimum on the ceiling side of the mounting groove.

17. In paragraph 16, The above digestive patch It has a thickness smaller than the depth of the above-mentioned fixing groove, and has a height difference with the inner surface of the top case while attached to the above-mentioned fixing groove. The above flame induction part The inner surface of the above top case is formed with the inner surface of the above fixing groove connected to the round structure of the inner surface, First gap and second gap between the side surface of the above digestive patch and the corresponding inner surface of the above fixing groove A battery pack extinguishing device that directs flames to the side of the extinguishing patch through the extinguishing patch.

18. In paragraph 1, The above digestive patch is placed in the above fixing groove, A battery pack extinguishing device, which attaches the above extinguishing patch and the inner surface of the above top case with patch tape.

19. In Article 18, The above digestive patch It has a thickness equal to the depth of the above-mentioned anchoring groove, A battery pack extinguishing device, wherein the above patch tape is attached to the inner surface of the above extinguishing patch and the above top case in a flat state.

20. In paragraph 1, The distance between the above digestive patch and the above battery cell is A battery pack extinguishing device, the thickness of which is set to 3 to 6 times that of the above extinguishing patch.

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