Battery pack

Abstract

A battery pack according to one embodiment of the present application can include a plurality of secondary battery cells, and a frame unit including a plurality of closed compartments in which the plurality of secondary battery cells are dispersedly accommodated, and when a flame or gas is generated in a secondary battery cell provided in any one of the compartments, the flame or the gas can be discharged to the outside.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2021-0021699, filed on February 18, 2021, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] This invention relates to a battery pack. Background Technology

[0004] With the increasing development and demand for technologies such as mobile devices and electric vehicles, the demand for secondary battery cells as energy sources is rapidly increasing. The interconversion between chemical energy and electrical energy in a secondary battery cell is reversible, therefore, a secondary battery cell is a battery that can be repeatedly charged and discharged.

[0005] In addition, multiple battery modules, each equipped with a secondary battery unit, can be installed as a battery pack in electric vehicles and the like.

[0006] In recent years, a module-free (Cell To Pack, CTP) technology has been proposed, which means that when installing such secondary battery cells in electric vehicles, the installation process after manufacturing the battery modules is omitted, and the secondary battery cells are directly installed in the electric vehicles to form a battery pack.

[0007] However, secondary battery cells generate heat during charging and discharging, and any secondary battery cell may explode due to the rise in temperature or due to external impact.

[0008] Furthermore, the explosion of any one secondary battery cell can spread to other secondary battery cells inside the battery pack installed in the vehicle, etc., and cause a chain reaction of explosions.

[0009] That is, the explosion of any one secondary battery cell can cause thermal propagation, flames, or high-temperature, high-pressure gases to act on other secondary battery cells inside the battery pack installed in the vehicle or other vehicle, leading to a chain reaction of explosions.

[0010] Therefore, in order to improve the above-mentioned problems or limitations, it is necessary to study battery packs. Summary of the Invention

[0011] (a) Technical problems to be solved

[0012] The purpose of this invention is to provide a battery pack in which secondary battery cells are directly installed in a vehicle or the like, and the battery pack improves the problem of chain explosions caused by the spread of flames or gases from the explosion of any one secondary battery cell to other secondary battery cells in the entire battery pack.

[0013] (II) Technical Solution

[0014] A battery pack according to an embodiment of the present invention may include: a plurality of secondary battery cells; and a frame unit including a plurality of sealed compartments, wherein the plurality of secondary battery cells are disposed separately in the compartments, and wherein the flame or the gas is discharged to the outside when a flame or gas is generated in a secondary battery cell disposed in any of the compartments.

[0015] Here, the frame unit of the battery pack according to an embodiment of the present invention may include a discharge pipe configured to communicate with the interior of the compartment to initially discharge the flame or the gas when a flame or gas is generated in the secondary battery unit disposed inside the compartment, and to communicate with the outside to secondarily discharge the flame or the gas to the outside.

[0016] Additionally, according to an embodiment of the present invention, the compartment of the battery pack may include: a lower frame on which the secondary battery cells are mounted; a side frame, the lower end of which is joined to the lower frame and surrounds a predetermined number of the secondary battery cells together with the discharge pipe; and an upper frame, which is joined to the upper ends of the discharge pipe and the side frame and covers the upper part of the secondary battery cells.

[0017] Furthermore, in the lower frame of the battery pack according to an embodiment of the present invention, a thermally conductive material may be coated on the upper surface of the lower frame on which the secondary battery cell is disposed, so as to directly dissipate the heat of the secondary battery cell to the outside.

[0018] Additionally, according to an embodiment of the present invention, the discharge pipe portion of the battery pack may include or define an internal hollow space or cavity. In the discharge pipe portion, a first communication hole communicating with the interior of the compartment is formed on a first sidewall of the discharge pipe portion facing the compartment. A communication adjustment portion is provided in the first communication hole to open the first communication hole when a flame or gas is generated in the secondary battery cell disposed in the compartment.

[0019] In this embodiment of the invention, the communication adjustment section of the battery pack can be configured as a rupture plate, which ruptures when the internal pressure of the compartment is higher than the internal pressure of the discharge pipe.

[0020] In addition, according to an embodiment of the present invention, the communication adjustment section of the battery pack can be configured as a one-way door, which opens and closes toward the hollow, space or cavity of the discharge pipe when the internal pressure of the compartment is higher than the internal pressure of the discharge pipe.

[0021] In addition, according to an embodiment of the present invention, the discharge pipe of the battery pack may face multiple compartments, and a second connecting hole is formed at one end of the discharge pipe to discharge the flame or the gas to the outside.

[0022] Alternatively, the discharge pipe of the battery pack according to an embodiment of the present invention may include baffles that divide the internal hollow space or cavity into multiple regions, and the baffles are disposed in portions corresponding to the boundaries between compartments that are close to, adjacent to or adjacent to each other.

[0023] In addition, according to an embodiment of the present invention, a second connecting hole for discharging the flame or the gas to the outside may be formed in the second sidewall of the discharge pipe portion of the battery pack facing the outside of the battery pack, and the second connecting hole is formed between baffles that are close to, adjacent to or adjacent to each other.

[0024] Furthermore, according to an embodiment of the present invention, the first connecting hole of the battery pack can be formed in the first sidewall at a position corresponding to both ends of the compartment, and the second connecting hole is formed in the second sidewall at a position corresponding to the center of the compartment.

[0025] Alternatively, in the discharge pipe portion of the battery pack according to an embodiment of the present invention, the first connecting hole may be formed in the first sidewall at a position corresponding to the center of the compartment, and the second connecting hole may be formed in the second sidewall at positions corresponding to the two ends of the compartment.

[0026] Furthermore, according to an embodiment of the present invention, the discharge pipe portion of the battery pack may further include a hole insulation portion disposed in at least one of a first communication hole formed to communicate with the interior of the compartment and / or a second communication hole formed to communicate with the outside.

[0027] In addition, a battery pack according to an embodiment of the present invention may further include a barrier component disposed between the plurality of said secondary battery cells.

[0028] (III) Beneficial Effects

[0029] According to the battery pack of the present invention, the secondary battery cells are directly installed in vehicles or the like, and the battery pack can improve the problem of chain explosions caused by the spread of flames or gases from the explosion of any one secondary battery cell to other secondary battery cells in the entire battery pack.

[0030] That is, the battery pack of the present invention has the effect of avoiding or preventing the spread of heat to secondary battery cells in other compartments in the event of thermal runaway of a secondary battery cell located in any one compartment.

[0031] However, the various beneficial advantages and effects of the present invention are not limited to the above description, and will be more readily understood in the process of describing specific embodiments of the present invention. Attached Figure Description

[0032] Figure 1 This is a cross-sectional plan view showing an embodiment of the battery pack of the present invention.

[0033] Figure 2 This is a cross-sectional view showing an embodiment in which the communication adjustment portion in the first communication hole of the discharge pipe section in the battery pack of the present invention is configured as a rupture plate.

[0034] Figure 3 This is a cross-sectional view showing an embodiment in which the communication adjustment portion in the first communication hole of the first sidewall of the discharge pipe section in the battery pack of the present invention is configured as a one-way door.

[0035] Figure 4 This is a cross-sectional view showing an embodiment in which a second connecting hole is formed on the second sidewall of the discharge pipe section in the battery pack of the present invention.

[0036] Figure 5 This is a cross-sectional plan view showing an embodiment in which the second connecting holes are respectively formed at the positions of the second sidewalls corresponding to the two ends of the compartment in the battery pack of the present invention.

[0037] Figure 6 This shows the path through which the flame or gas exits via the first and second connecting holes. Figure 5 A partial enlarged view of the cross-sectional plan view.

[0038] Figure 7 This is a cross-sectional plan view showing an embodiment in which the second connecting hole is formed at a position on the second sidewall corresponding to the center of the compartment in the battery pack of the present invention.

[0039] Figure 8 This shows the path through which the flame or gas exits via the first and second connecting holes. Figure 7 A partial enlarged view of the cross-sectional plan view.

[0040] Explanation of reference numerals in the attached figures

[0041] 100: Secondary battery unit; 200: Frame unit

[0042] 210: Compartment 211: Lower frame

[0043] 212: Side frame; 213: Top frame

[0044] 220: Discharge pipe section; 221: First sidewall

[0045] 222: Second sidewall; 223: First connecting hole

[0046] 224: Second connecting hole; 225: Connecting adjustment part

[0047] 226: Baffle plate; 227: Hole insulation section

[0048] 300: Barrier component Detailed Implementation

[0049] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, embodiments of the present invention can be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, the embodiments of the present invention are provided to provide a more complete explanation of the invention to those skilled in the art. For clarity, the shapes and dimensions of the components in the figures may be shown enlarged.

[0050] Furthermore, in this specification, unless otherwise expressly stated in the context, singular expressions include plural expressions, and throughout the specification, the same reference numerals or reference numerals assigned in a similar manner refer to the same components or corresponding components.

[0051] This invention relates to a battery pack, and can be applied to cell-to-pack (CTP) technology, which allows secondary battery cells to be directly installed in vehicles and other applications. This technology eliminates unnecessary battery modules and other components, thereby achieving weight reduction, improved thermal conductivity, and increased energy density.

[0052] Furthermore, this invention can mitigate the problem of chain explosions caused by the propagation of flames or gases from the explosion of any one secondary battery cell in the battery pack to other secondary battery cells throughout the battery pack. Specifically, in the battery pack of this invention, in the event of thermal runaway in a secondary battery cell located in any compartment, thermal propagation to secondary battery cells located in other compartments can be avoided or prevented.

[0053] Figure 1 This is a cross-sectional plan view illustrating an embodiment of the battery pack of the present invention, with reference to... Figure 1The battery pack of the present invention may include a plurality of secondary battery cells 100 and a frame unit 200. The frame unit 200 includes a plurality of sealed compartments 210, in which the plurality of secondary battery cells 100 are distributedly housed. For example, a group or subset of more than one secondary battery cell 100 is housed in each sealed compartment 210. For example, when a flame or gas is generated in any of the secondary battery cells 100 located in any compartment 210, the frame unit 200 can exhaust the flame or gas to the outside. For example, the frame unit 200 can exhaust the flame or gas in a circuitous manner.

[0054] That is, the frame unit 200 divides and arranges the multiple secondary battery units 100 in a predetermined number of units in a sealed compartment 210, thereby avoiding or temporarily preventing the secondary battery units 100 from exploding in one compartment 210 and affecting the secondary battery units 100 in another compartment 210, which could lead to a chain explosion of secondary battery units 100.

[0055] Furthermore, the flames or gases generated by the explosion of the secondary battery unit 100 in any one compartment 210 can be diverted to prevent them from affecting other compartments 210, thereby reducing or avoiding the spread of the heat of the explosion to the secondary battery units 100 located in other compartments 210, thus preventing or avoiding further explosions.

[0056] Multiple secondary battery units 100 may be accommodated or disposed in the interior space of each of the multiple compartments 210 divided in the frame unit 200 in a predetermined number of units, for example, a group or a subset of more than one secondary battery unit 100 may be accommodated or disposed in each of the divided compartments 210.

[0057] Furthermore, each secondary battery cell 100 may include an electrode assembly and a battery cell body component surrounding the electrode assembly.

[0058] The electrode assembly includes an electrolyte and is used within the main body of the battery cell. The electrolyte may contain lithium salts such as LiPF6 and LiBF4 in organic solvents such as ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), ethylmethyl carbonate (EMC), and dimethyl carbonate (DMC). Furthermore, the electrolyte may be liquid, solid, or gel-like.

[0059] Additionally, the battery cell body component is configured to protect the electrode assembly and contain the electrolyte. For example, the battery cell body component can be configured as a pouch-type component or a can-type component. For instance, a pouch-type component can be configured to seal and contain the electrode assembly on three surfaces, including, for example, a top surface and side surfaces, which can be folded and joined to internally seal the electrode assembly. Similarly, a can-type component can seal and contain the electrode assembly on one surface and, for example, four other surfaces. One surface can be a top surface, and the four surfaces include a bottom surface and side surfaces; one surface and the other two surfaces can be folded and joined to internally seal the electrode assembly.

[0060] However, such pouch-type secondary battery unit 100 and can-type secondary battery unit 100 are merely examples of secondary battery units 100 that can be housed in the battery pack of the present invention. The secondary battery units 100 housed in the battery pack of the present invention are not limited to these types, and secondary battery units 100 sealed on multiple surfaces, for example, four sides, can be used.

[0061] The frame unit 200 may include a plurality of compartments 210. The plurality of secondary battery units 100 may be divided into a predetermined number of units capable of being accommodated within the sealed interior of the compartments 210.

[0062] For example, such as Figure 2 and Figure 3 As shown and as will be described in more detail below, a compartment 210 may include a lower frame 211, a side frame 212, and an upper frame 213.

[0063] For example, when a flame or gas is generated in the secondary battery unit 100 located in any of the compartments 210, the frame unit 200 can detour to discharge the flame or gas to prevent it from spreading to another compartment 210. To this end, the frame unit 200 may include a discharge pipe 220 for discharging the flame or gas.

[0064] For example, when a flame or gas is generated in the secondary battery unit 100 disposed inside the compartment 210, according to an embodiment of the present invention, the discharge pipe 220 can communicate with the interior of the compartment 210 and can initially discharge the flame or gas from the compartment 210, and can also communicate with the outside to secondarily discharge the flame or gas from the discharge pipe 220 to the outside. For example, the discharge pipe 220 can cooperate with the compartment 210 to seal the interior of the compartment 210.

[0065] That is, the flame or gas generated by the explosion of the secondary battery unit 100 located in any one of the compartments 210 can be discharged to the outside through the discharge pipe 220. Therefore, the flame or gas generated in the secondary battery unit 100 located in any one of the compartments 210 will not affect the secondary battery unit 100 located in another compartment 210, and can avoid or at least temporarily prevent chain explosions in other compartments 210.

[0066] Therefore, according to an embodiment of the present invention, the discharge pipe portion 220 of the battery pack may include or define an internal hollow space or cavity. For example, the discharge pipe portion 220 may be tubular, channel-shaped, or conduit-shaped.

[0067] For example, in the discharge pipe section 220, a first communication hole 223 communicating with the interior of the compartment 210 is formed on the first sidewall 221 of the discharge pipe section 220 facing the compartment 210. A communication adjustment part (or device) 225 may be provided in the first communication hole 223 to open the first communication hole 223 when a flame or gas is generated in the secondary battery unit 100 located inside the compartment 210.

[0068] For example, the discharge pipe 220 may define one side of the interior or space of the compartment 210, thereby sealing the interior of the compartment 210.

[0069] Furthermore, the discharge pipe 220 may have a first communication hole 223 communicating with the interior of the compartment 210 to accommodate flames or gases generated inside the compartment 210. For example, the first communication hole 223 may be formed on a first sidewall 221 facing the interior or space of the compartment 210.

[0070] Furthermore, to keep the interior of the compartment 210 sealed under normal conditions, the first communication hole 223 can be closed by the communication adjustment part (or device) 225. On the other hand, when any of the secondary battery units 100 housed inside the compartment 210 explodes, generating flames or gases, the communication adjustment part (or device) 225 opens the first communication hole 223. For this purpose, the communication adjustment part (or device) 225 can be configured as a rupture plate 225a, a one-way door 225b, etc. The rupture plate 225a and the one-way door 225b will be referred to below. Figure 2 and Figure 3 Provide a detailed description.

[0071] In addition, according to an embodiment of the present invention, the discharge pipe 220 of the battery pack may face or be arranged side by side with a plurality of compartments 210, and a second communication hole 224 for discharging the flame or the gas to the outside may be formed at one end of the discharge pipe 220.

[0072] In the first embodiment, the second communication hole 224 of the discharge pipe portion 220 may be formed at one end of the discharge pipe portion 220, which is tubular, channel-shaped, or conduit-shaped.

[0073] Accordingly, the first communication hole 223, which connects to the interior of each compartment 210 while engaging with the plurality of compartments 210, is configured to engage with each compartment 210. Flame or gas generated in any compartment 210 can be discharged through the first communication hole 223 and subsequently exit through the second communication hole 224 formed at one end of the discharge pipe 220. According to a first embodiment of the discharge pipe 220, when flame or gas is discharged in a detour, for example through the second communication hole 224 formed at one end of the discharge pipe 220, a baffle 226 is not required. Figure 6 Additional structures. Furthermore, by extending the exhaust path of the flame or gas, the flame or gas can be allowed to cool down and extinguish naturally during the exhaust process.

[0074] Figure 2 This is a cross-sectional view showing an embodiment in which the communication adjustment part (or device) 225 in the first communication hole 223 of the first sidewall 221 of the discharge pipe 220 in the battery pack of the present invention is configured as a rupture plate 225a. Figure 3 This is a cross-sectional view showing an embodiment in which the communication adjustment part (or device) 225 in the first communication hole 223 in the first sidewall 221 of the discharge pipe 220 in the battery pack of the present invention is configured as a one-way door 225b.

[0075] Reference Figures 1 to 3 For example, according to an embodiment of the present invention, the compartment 210 of the battery pack may include: a lower frame 211 on which the secondary battery unit 100 is disposed; a side frame 212, the lower end of which is joined to the lower frame 211 and together with the discharge pipe portion 220, surrounds, for example, a predetermined number of units, groups or subsets of the secondary battery units 100 in the side or in the circumferential direction; and an upper frame 213, which is joined to the upper ends of the discharge pipe portion 220 and the side frame 212 and covers the upper part of the secondary battery unit 100.

[0076] That is, in order to seal the internal space of the compartment 210, it may include the lower frame 211, the side frame 212 and the upper frame 213.

[0077] For example, the secondary battery unit 100 can be mounted on the lower frame 211. The lower frame 211 can be divided into multiple regions by the side frame 212, so that the secondary battery unit 100 can be isolated in a predetermined number of units. That is, the lower frame 211 is a frame in which multiple secondary battery units 100 are mounted, but it can be divided into multiple regions by the side frame 212 to accommodate a predetermined number of secondary battery units 100.

[0078] For example, the lower frame 211 may be a frame disposed on the floor portion below the seating area of ​​the vehicle frame.

[0079] In addition, in the lower frame 211 of the battery pack according to an embodiment of the present invention, a thermally conductive material 211a may be coated on the upper surface of the lower frame 211 on which the secondary battery cell 100 is disposed, so as to directly dissipate the heat generated by the secondary battery cell 100 to the outside.

[0080] That is, in the battery pack of the present invention, since the secondary battery unit 100 is directly installed in the vehicle without intermediate components such as battery modules, the heat generated in the secondary battery unit 100 can be directly dissipated through the lower frame 211 without intermediate components. At this time, the battery pack may also include a thermally conductive material 211a to improve heat dissipation efficiency.

[0081] The side frame 212 is configured to surround a predetermined number of secondary battery cells 100. For this purpose, the lower end of the side frame 212 can be attached to the upper surface of the lower frame 211. Furthermore, the side frame 212 can be configured to divide the lower frame 211 into multiple regions.

[0082] For example, such as Figure 1 As shown, the side frame 212 can be configured to form a plurality of quadrilateral, such as rectangular, regions on the upper surface of the lower frame 211.

[0083] Furthermore, the side frame 212 is configured to surround three sides of the interior space of the compartment 210, while the remaining side is surrounded by the discharge pipe portion 220, such as the first sidewall 221 of the discharge pipe portion 220, so that a predetermined number of units, groups or subsets of the secondary battery cells 100 can be completely surrounded around the side.

[0084] The upper frame 213 can cover the upper part of a predetermined number of units, groups, or subsets of the secondary battery cells 100, thereby sealing the internal space of the compartment 210. For this purpose, the upper frame 213 can be attached to the upper end of the side frame 212 and the upper end of the discharge pipe 220.

[0085] In addition, according to an embodiment of the present invention, the communication adjustment section or device 225 of the battery pack can be configured as a rupture plate 225a, which ruptures when the internal pressure of the compartment 210 is higher than the internal pressure of the discharge pipe section 220.

[0086] That is, the rupture plate 225a is configured to extend across the first connecting hole 223 to close or cover the first connecting hole 223, and to tear and open when a predetermined pressure is applied. For example, the predetermined pressure can be set to a situation where the internal pressure of the compartment 210 is higher than the external pressure. For example, the rupture plate 225a can be formed of a material having tear strength when the internal pressure of the compartment 210 is higher than the external pressure. However, the invention is not limited thereto, and the rupture plate 225a can also be configured to have tear strength when a pressure difference of more than 1 atmosphere (atm) or more than 2 atmospheres is generated between the internal pressure and the external pressure.

[0087] For example, the rupture plate 225a may be formed of a metal plate that is thinner than the thickness of other portions of the first sidewall 221 of the discharge pipe portion 220, or it may be formed of a thin film of a material such as rubber.

[0088] Alternatively, the communication adjustment section or device 225 of the battery pack according to an embodiment of the present invention can be configured as a one-way door 225b, which opens and closes toward or toward the hollow, space or cavity side of the discharge pipe section 220 when the internal pressure of the compartment 210 is higher than the internal pressure of the discharge pipe section 220.

[0089] That is, the one-way door 225b is configured to block the first connecting hole 223, close the first connecting hole 223, and move to open the first connecting hole 223 when the predetermined pressure is above.

[0090] As with the aforementioned rupture plate 225a, the predetermined pressure can be set differently from atmospheric pressure to open or close the one-way door 225b.

[0091] Furthermore, the one-way door 225b can be configured to seal the first communication hole 223 and move only in the direction of the outer side of the compartment 210, i.e., the hollow, space, or cavity side of the discharge pipe 220, to open.

[0092] Specifically, the one-way door 225b is configured such that one end is hinged to a portion of the first sidewall 221 near, adjacent to, or close to the first communication hole 223, and the other end is engaged, for example, in a partially fitted manner with another portion of the first sidewall 221 near, adjacent to, or close to the first communication hole 223.

[0093] Therefore, for example, when the one-way door 225b is pushed to move the flame or the gas from the interior of the compartment 210 or to the exterior, the first communication hole 223 is opened. Similarly, when the one-way door 225b is pushed to move the flame or the gas from the exterior of the compartment 210 or to the interior of the compartment 210, the one-way door 225b engages near, adjacent to, or against the portion of the first sidewall 221 close to, adjacent to, or against the first communication hole 223 and is not opened, thus closing the first communication hole 223. In this way, the one-way door 225b can prevent, or at least temporarily prevent, flame or gas from the hollow, spatial, or cavity side of the discharge pipe 220 from entering the interior of the compartment 210.

[0094] For example, in the one-way door 225b, a spring component or the like that applies elastic force in the direction of closing the first connecting hole 223 can be provided at one end of the one-way door 225b that is hinged to the first side wall 221.

[0095] Figure 4 This is a cross-sectional view showing an embodiment in which the second connecting hole 224 is formed on the second sidewall 222 of the discharge pipe portion 220 in the battery pack of the present invention. (Refer to...) Figure 4 , Figure 4 The discharge pipe portion 220 of the battery pack according to an embodiment of the present invention may further include a hole insulation portion 227.

[0096] The hole insulation portion 227 may be provided in the first connecting hole 223 which is formed to communicate with the interior of the compartment 210 or in the second connecting hole 224 which is formed to communicate with the outside, or the hole insulation portion 227 may be provided around the first connecting hole 223 and the second connecting hole 224.

[0097] When the aforementioned hole insulation portion 227 is provided, the problem of the discharge pipe portion 220, etc., acquiring electrical properties due to conductive particles generated by the explosion of the secondary battery unit 100 in one compartment 210, thereby causing the secondary battery unit 100 housed in another compartment 210 to be electrically affected, can be avoided or prevented. Furthermore, the problem of electrical shocks generated by conductive particles affecting other electronic devices through the discharge pipe portion 220, etc., can also be avoided or prevented.

[0098] Figure 5 This illustrates that in the battery pack of the present invention, a second connecting hole 224 is formed on the second sidewall 222 of the discharge pipe portion 220. Figure 2 Cross-sectional plan view of an embodiment of ) Figure 6 This illustrates the path through which flame or gas exits via the first connecting hole 223 and a pair of spaced-apart second connecting holes 224. Figure 5 A partial enlarged view of the cross-sectional plan view.

[0099] in addition, Figure 7 This is a cross-sectional plan view showing an embodiment in which the second connecting hole 224 is formed at the position of the second sidewall 222 of the discharge pipe portion 220 corresponding to the center portion of the compartment 210 in the battery pack of the present invention. Figure 8 This illustrates the path through which flames or gases exit via a pair of first connecting holes 223 and second connecting holes 224. Figure 7 A partial enlarged view of the cross-sectional plan view.

[0100] Reference Figure 5 and Figure 6 According to an embodiment of the present invention, the discharge pipe portion 220 of the battery pack is provided with one or more baffles 226 that divide the interior hollow space or cavity of the discharge pipe portion 220 into multiple regions. For example, the baffles 226 may be provided in the portion of the hollow space or cavity corresponding to the boundary between the compartments 210 that are close to, adjacent to or adjacent to each other.

[0101] That is, the baffle 226 may be plate-shaped, which is configured to extend from the side frame 212 and can traverse the hollow, space or cavity inside the discharge pipe section 220.

[0102] By means of the baffle 226 as described above, the discharge pipe section 220 can be divided into areas corresponding to the areas where each compartment 210 is provided and isolated.

[0103] Furthermore, according to an embodiment of the present invention, the discharge pipe portion 220 of the battery pack may include one or more second connecting holes 224 formed between one or more baffles 226 in the second sidewall 222 facing the outside for discharging the flame or the gas to the outside.

[0104] That is, in this embodiment of the discharge pipe section 220, the hollow, space or cavity inside the discharge pipe section 220 can be divided into regions by one or more baffles 226 and the divided regions can be isolated from each compartment 210 accordingly, and one or more second connecting holes 224 can be formed in the portion corresponding to each compartment 210.

[0105] Therefore, flames or gases generated inside each compartment 210 and entering the interior of the discharge pipe section 220 can be discharged through one or more second communication holes 224 formed in the portion of the discharge pipe section 220 that is correspondingly isolated from each compartment 210.

[0106] Furthermore, to extend the detour path of the flame or gas, the first connecting hole 223 and one or more second connecting holes 224 can be staggered into a Z-shape. As the emission path of the flame or gas is extended, the flame or gas may cool down and extinguish itself during the emission process.

[0107] Reference Figure 7 and Figure 8 In order to make the first connecting hole 223 and the second connecting hole 224 form a Z-shape, in the discharge pipe portion 220 of the battery pack according to an embodiment of the present invention, one or more of the first connecting holes 223 may be formed in the first side wall 221 at a position close to, adjacent to or close to the side frame 212 corresponding to the two ends of the compartment 210, and the second connecting hole 224 may be formed in the second side wall 222 at a position corresponding to the center of the compartment 210.

[0108] In this case, since each first connecting hole 223 is formed near, adjacent to or close to the electrode lead portion of the secondary battery cell 100 where the probability of flame generation is high, the flame or gas generated in the secondary battery cell 100 inside any compartment 210 is discharged through the shortest path inside the compartment 210, that is, the flame or gas can be discharged quickly.

[0109] Or, such as Figure 5 and Figure 6 As shown, in the discharge pipe portion 220 of the battery pack according to an embodiment of the present invention, the first connecting hole 223 may be formed in the first side wall 221 at a position corresponding to the center portion of the compartment 210, and the second connecting hole 224 may be formed in the second side wall 222 at positions corresponding to the two ends of the compartment 210.

[0110] In this situation, since the flame generated inside the compartment 210 is discharged through a relatively narrow first connecting hole 223, the probability of air including oxygen flowing into the compartment 210 from the outside can be reduced, thus helping to suffocate or extinguish the flame.

[0111] also, Figure 6 and Figure 8 The battery pack shown according to an embodiment of the present invention may further include a barrier member 300 disposed between the plurality of said secondary battery cells 100.

[0112] The barrier component 300 is used to prevent or avoid the propagation of at least one of the heat and flame generated in any one of the secondary battery cells 100 to other nearby secondary battery cells 100. For this purpose, the barrier component 300 may be disposed between the secondary battery cells 100 that are close to, adjacent to or adjacent to each other.

[0113] For example, the barrier component 300 can be formed of refractory materials such as iron (Fe), copper (Cu), and aluminum (Al) to avoid or block the propagation of heat and flames.

[0114] Alternatively, the barrier component 300 may be formed of at least one of polymeric materials, inorganic materials, and ceramic materials that avoid or prevent heat transfer, so as to avoid or block the propagation of heat and flames.

[0115] Here, polymeric materials can include, for example, materials like silicone resins. In addition, inorganic materials are those that do not contain carbon (C), and can be, for example, silicon compounds such as mica, lime, salt, and glass, and some metals such as iron. The ceramic materials can be, for example, oxides, carbides, and nitrides formed by combining metallic elements such as silicon (Si), aluminum (Al), titanium (Ti), and zirconium (Zr) with oxygen, carbon, and nitrogen. These ceramic materials can be manufactured using natural raw materials such as clay, kaolin, feldspar, and silica, or using synthetic raw materials such as silicon carbide, silicon nitride, alumina, zirconium oxide, and barium titanate.

[0116] The embodiments of the present invention have been described above, but the scope of the present invention is not limited thereto. Various modifications and alterations can be made without departing from the technical concept of the present invention as set forth in the claims, which will be obvious to those skilled in the art.

Claims

1. A battery pack, comprising: Multiple secondary battery cells; as well as The frame unit includes multiple sealed compartments in which multiple secondary battery cells are distributedly housed, and when a flame or gas is generated in a secondary battery cell located in any of the compartments, the flame or gas is exhausted to the outside. The frame unit includes: The discharge pipe section has a hollow interior; Multiple baffles are respectively disposed at portions corresponding to the boundaries of the multiple compartments, and divide the hollow interior of the discharge pipe into multiple isolation spaces; A first connecting hole is formed on the first sidewall of the discharge pipe facing the compartment and communicates with the interior of the compartment; and A second connecting hole is formed on the outer sidewall of the discharge pipe section, and discharges the flame or the gas to the outside. The first connecting hole and the second connecting hole are formed in each of the isolation spaces.

2. The battery pack according to claim 1, wherein, The discharge pipe is configured to first discharge the flame or gas when a flame or gas is generated in the secondary battery cell located inside the compartment, and then discharge the flame or gas to the outside a second time.

3. The battery pack according to claim 2, wherein, The compartment includes: The lower frame, on which the secondary battery unit is mounted; A side frame, the lower end of which is attached to the lower frame, and together with the discharge pipe portion, surrounds a predetermined number of units of the secondary battery cell; and The upper frame is attached to the upper end of the discharge pipe and the side frame, and covers the upper part of the secondary battery unit.

4. The battery pack according to claim 3, wherein, In the lower frame, a thermally conductive material is coated on the upper surface of the lower frame on which the secondary battery cell is housed, so as to dissipate the heat of the secondary battery cell directly to the outside.

5. The battery pack according to claim 1, wherein, The first connecting hole is provided with a connecting adjustment part to open the first connecting hole when a flame or gas is generated in the secondary battery unit located inside the compartment.

6. The battery pack according to claim 5, wherein, The communication regulating section is configured as a rupture plate, which ruptures when the internal pressure of the compartment is higher than the internal pressure of the discharge pipe.

7. The battery pack according to claim 5, wherein, The communication adjustment section is configured as a one-way door. When the internal pressure of the compartment becomes higher than the internal pressure of the discharge pipe section, the one-way door opens and closes towards the hollow space or cavity of the discharge pipe section.

8. The battery pack according to claim 1, wherein, The first connecting holes are respectively formed in the first side wall at positions corresponding to the two ends of the compartment, and the second connecting holes are formed in the second side wall at positions corresponding to the center of the compartment.

9. The battery pack according to claim 1, wherein, In the discharge pipe section, the first connecting hole is formed in the first side wall at a position corresponding to the center of the compartment, and the second connecting holes are respectively formed in the second side wall at positions corresponding to the two ends of the compartment.

10. The battery pack according to claim 2, wherein, The discharge pipe further includes a hole insulation portion, which is disposed in the first connecting hole, the second connecting hole, or both the first connecting hole and the second connecting hole.

11. The battery pack according to claim 1, further comprising a barrier component disposed between the plurality of said secondary battery cells.

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