Battery assembly cover, battery pack, and vehicle

Abstract

A battery assembly cover, battery pack, and vehicle are disclosed, each including an inner covering portion that covers the battery assembly and has a plurality of venting holes formed therein, an outer covering portion that covers the inner covering portion on the outside, spaced apart from the inner covering portion, and forming a venting space between the inner covering portion and the outer covering portion, and a plurality of outer shielding portions that are arranged in the venting space and provided between adjacent venting holes to divide the venting space into a plurality of spaces.

Description

Technical Field

[0001] The present invention relates to a battery assembly cover, a battery pack, and a vehicle that are coupled to a battery module or assembly to cover an internal battery assembly, effectively prevent flame propagation between adjacent battery cells when gas or flame is generated due to deterioration of the battery cells, maximize prevention of flame propagation to the outside of the battery module, and allow gas and the like to be smoothly bent.

Background Art

[0002] In recent years, in order to solve environmental problems such as abnormal temperatures, technologies for carbon reduction have been actively developed. In order to reduce carbon, it is necessary to produce energy in an environmentally friendly way rather than producing energy from fossil fuels, store the produced energy in the form of electrical energy, and use this stored electrical energy in vehicles, various industrial sites, and households.

[0003] In order to utilize electrical energy for carbon reduction, it is essential to use a battery that can store and derive electrical energy. Therefore, ensuring the performance of the battery is essential in order to sufficiently store electrical energy and use it without inconvenience.

[0004] Batteries mainly use the oxidation-reduction reaction of metal ions. In order to increase the capacity, charge-discharge performance, and efficiency of batteries, metal ions are used at high density, and much research has been conducted on substances constituting electrolytes and solid electrolytes. However, generally, there is a problem that the safety decreases as the performance of the battery develops.

[0005] Batteries used in vehicles, industries, or homes are manufactured in physical units called battery packs. A battery pack encloses numerous battery cells inside a sealed battery case, preventing fire from spreading to the outside in the event of an accident such as battery overheating, and protecting the internal battery cells from degradation due to external environmental factors or physical damage.

[0006] A battery pack contains numerous battery cells in an intermediate form between modules and cell modules (CMAs, or cell module assemblies). In the case of battery modules or cell assemblies, numerous battery cells are assembled into a single module or assembly, and the battery pack is completed by fastening these modules inside the pack case. Maintenance is made easier by allowing maintenance to be performed on these module or assembly units.

[0007] The numerous unit battery cells that make up a module or assembly consist of a positive electrode, a negative electrode, and an electrolyte. Since battery cells generate heat during charging and discharging, effective heat dissipation is necessary. Furthermore, from the perspective of battery modules, assemblies, or battery packs, efficient heat dissipation design is essential to prevent safety accidents.

[0008] On the other hand, batteries can deteriorate due to manufacturing errors, excessive charging and discharging, and aging. If battery deterioration persists, it can eventually lead to a fire. Therefore, it is necessary to take precautions to prevent battery fires. To this end, it is important to continuously sense the battery's condition, recognize and respond to any problems in advance, and minimize damage when unexpected problems occur.

[0009] In particular, when a fire occurs in one of several battery cells, it is necessary to minimize the spread of the flame to adjacent battery cells and to minimize the spread of the flame to the outside, thereby delaying the outflow of the flame as much as possible. At the same time, it is preferable to ensure safety by rapidly venting the gas generated in the battery cell to reduce the sudden occurrence of flames.

[0010] The matters described above as background technology are merely for the purpose of enhancing understanding of the background of the present invention and should not be accepted as acknowledging that they correspond to prior art already known to those with ordinary skill in the art. [Overview of the Initiative] [Problems that the invention aims to solve]

[0011] The present invention was proposed to solve these problems and aims to provide a battery assembly cover, battery pack, and vehicle that are coupled to a battery module or assembly to cover the internal battery assemblies, effectively prevent flame propagation between adjacent battery cells in the event of gas or flame generation due to battery cell degradation, minimize flame propagation to the outside of the battery module, and allow for smooth venting of gases, etc.

[0012] The technical problems that this invention aims to solve are not limited to those mentioned above, and other technical problems not mentioned will be clearly understandable to a person with ordinary skill in the art to which this invention belongs from the following description. [Means for solving the problem]

[0013] To achieve the aforementioned objectives, the battery assembly cover according to the present invention includes: an inner covering portion coupled to a case in which a battery assembly is housed and covering the battery assembly, having a plurality of venting holes formed therein; an outer covering portion that covers the inner covering portion on the outside, separated from the inner covering portion, and forming a venting space between the inner covering portion and the outer covering portion; and a plurality of outer shielding portions arranged in the venting space and provided between adjacent venting holes, dividing the venting space into a plurality of spaces.

[0014] The venting holes in the inner covering can be formed at positions corresponding to the battery cells that make up the battery assembly.

[0015] The venting holes in the inner covering portion may extend longitudinally along the direction in which the battery cells extend.

[0016] The inner covering portion may include a metal frame and a cover body that is insert-injection molded into the frame.

[0017] The cover body may be formed on the same plane as the frame.

[0018] Vent holes may be formed in the cover body.

[0019] The battery assembly cover can be attached to the case via the frame's edge.

[0020] The inner covering portion may further include an inner shielding portion that protrudes toward the battery cell side.

[0021] The internal shielding section is located between adjacent battery cells and can prevent flame propagation between them.

[0022] The inner and outer blocking portions may be formed at the same point on the inner covering portion, projecting in opposite directions from each other.

[0023] The inner blocking part and the outer blocking part can be integrally formed with the inner covering part.

[0024] The inner blocking part is provided between adjacent venting holes and can prevent the propagation of flames between the venting holes.

[0025] The inner blocking part extends longitudinally along the direction in which the battery cells extend, and a mounting groove can extend longitudinally in the inner blocking part.

[0026] The end part of the pressing pad located between adjacent battery cells can be inserted into the mounting groove.

[0027] A blocking wall is formed between the end parts of adjacent inner blocking parts, and the inner space formed between adjacent inner blocking parts is blocked by the blocking wall and can communicate with the venting holes.

[0028] A clip part that protrudes toward the pressing pad located between the battery cells and grips the pressing pad can be formed at the end part of the inner blocking part.

[0029] The outer covering part covers the inner covering part on the outside separated from the inner covering part, so that the venting holes can be prevented from being exposed to the outside.

[0030] By opening the end part of the outer covering part, the venting space can be opened at the end part of the outer covering part.

[0031] A plurality of venting channels can be formed by dividing the venting space by a plurality of outer blocking parts.

[0032] The inner covering part and the outer covering part are connected via the outer blocking part, and the inner covering part, the outer covering part and the outer blocking part can be integrally formed together.

[0033] The battery pack and vehicle of the present invention may include the battery assembly cover described above. [Effects of the Invention]

[0034] The battery assembly cover of the present invention is coupled to a battery module or assembly to cover the internal battery assembly, effectively preventing flame propagation between adjacent battery cells in the event of gas or flame generation due to battery cell degradation, maximizing the prevention of flame propagation to the outside of the battery module, and further ensuring smooth venting of gases, etc.

[0035] In particular, it is possible to provide a structure that is most effective in preventing or delaying fire spread by firstly preventing direct flame propagation between adjacent battery cells inside the cover, secondly effectively preventing flame propagation through venting holes outside the cover, and further ensuring that gas is smoothly vented through the cover.

[0036] The effects obtained by the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understandable to a person with ordinary skill in the art to which the present invention belongs from the following description. [Brief explanation of the drawing]

[0037] [Figure 1] This is a perspective view showing a battery assembly cover according to one embodiment of the present invention. [Figure 2] Figure 1 is a magnified view of a portion of the battery assembly cover. [Figure 3] Figure 1 is a perspective view of the battery assembly cover, seen from below. [Figure 4] Figure 3 is a magnified view of a portion of the battery assembly cover. [Figure 5] This figure shows the frame of the battery assembly cover shown in Figure 1. [Figure 6]This figure shows the inner covering part attached to the frame shown in Figure 5. [Figure 7] This figure shows the battery module formed by attaching the battery assembly cover shown in Figure 1 to the case. [Figure 8] Figure 7 is a cross-sectional view taken along the AA line of the battery module shown. [Figure 9] Figure 7 is a cross-sectional view taken along the BB line of the battery module shown. [Figure 10] This figure shows a battery pack and a vehicle to which a battery assembly cover according to one embodiment of the present invention is applied. [Modes for carrying out the invention]

[0038] In describing the embodiments disclosed herein, if it is determined that a specific description of related known technology may obscure the essence of the embodiments disclosed herein, such detailed description will be omitted. Furthermore, the accompanying drawings are merely for the purpose of facilitating the understanding of the embodiments disclosed herein, and should not be understood as limiting the technical ideas disclosed herein, but rather as including all modifications, equivalents, or substitutions that fall within the concept and technical scope of the present invention.

[0039] Terms including ordinal numbers such as "first," "second," etc., can be used to describe a variety of components, but the components are not limited by such terms. These terms are used solely for the purpose of distinguishing one component from another.

[0040] A singular expression includes plural expressions unless explicitly indicated otherwise in the context.

[0041] In this specification, terms such as “includes” or “have” are intended to indicate the presence of features, figures, stages, operations, components, parts, or combinations thereof as described in the specification, and should be understood not to preemptively exclude the possibility of the presence or addition of one or more other features, figures, stages, operations, components, parts, or combinations thereof.

[0042] The suffixes "module" and "part" used with respect to the constituent elements in the following description are added or used interchangeably solely for the purpose of facilitating the preparation of the specification, and do not in themselves have a distinct meaning or role from one another.

[0043] When it is mentioned that one component is “connected” or “linked” to another component, it should be understood that this may mean that it is directly connected or linked to the other component, or that there may be other components in between. On the other hand, when it is mentioned that one component is “directly connected” or “directly linked” to another component, it should be understood that there are no other components in between.

[0044] Figure 1 is a perspective view showing a battery assembly cover according to one embodiment of the present invention; Figure 2 is a partially enlarged view of the battery assembly cover shown in Figure 1; Figure 3 is a perspective view of the battery assembly cover shown in Figure 1 viewed from below; Figure 4 is a partially enlarged view of the battery assembly cover shown in Figure 3; Figure 5 shows the frame of the battery assembly cover shown in Figure 1; Figure 6 shows the state in which the inner covering part is attached to the frame shown in Figure 5; Figure 7 shows the state in which the battery assembly cover shown in Figure 1 is attached to the case to constitute a battery module; Figure 8 is a cross-sectional view of the battery module shown in Figure 7 cut along line AA; Figure 9 is a cross-sectional view of the battery module shown in Figure 7 cut along line BB; and Figure 10 shows a battery pack and vehicle to which a battery assembly cover according to one embodiment of the present invention is applied.

[0045] The embodiments disclosed herein will now be described in detail with reference to the attached drawings. Identical or similar components will be given the same reference numerals regardless of their relationship to the drawings, and redundant descriptions thereof will be omitted.

[0046] Figures 1 to 4 show a battery assembly cover according to an embodiment of the present invention. The battery assembly cover according to the present invention includes an inner covering portion 100 which is coupled to a case C in which a battery assembly CA is housed and covers the battery assembly CA, and which has a plurality of venting holes 110 formed thereon; an outer covering portion 300 which covers the inner covering portion 100 on the outside, separated from the inner covering portion 100, and forms a venting space 130 between itself and the inner covering portion 100; and a plurality of outer shielding portions 320 which are arranged in the venting space 130 and provided between adjacent venting holes 110, and which divide the venting space 130 into a plurality of spaces.

[0047] A battery assembly CA is composed of numerous battery cells B. The battery assembly CA is then inserted into a case C and housed inside. As shown in Figure 7, the cover of the present invention is coupled to the case C and closed, thereby forming a battery module M or cell assembly. Multiple battery modules M are housed inside a pack case, and the pack case is closed via pack leads to complete a battery pack BP. The battery pack BP is mounted in a vehicle V, ESS, or other industrial equipment and functions as a power source.

[0048] In the case of a battery assembly CA, since it is composed of many battery cells B, if a fire occurs due to degradation in any one of the battery cells, the flame may spread to other adjacent battery cells. Therefore, in the case of a battery assembly, it is necessary to prevent flame propagation between adjacent battery cells as much as possible.

[0049] On the other hand, in the case of battery cell B, when degradation occurs, the first step is to prevent explosions and flames from forming or to delay them as much as possible by venting gases in a specific direction. Therefore, in the case of battery cell B, gases are vented in a specific direction, and the illustrated embodiment shows a case where the gas is designed to be vented upwards relative to the drawing.

[0050] Since gas venting from battery cell B occurs upward, it is highly likely that the flame will also be released upward, in the same direction as the venting. Therefore, in the present invention, direct flame propagation between battery cells is prevented by blocking flame propagation between adjacent battery cells on the upper side of battery assembly CA.

[0051] For this purpose, the battery assembly cover according to the present invention is coupled to a case C in which the battery assembly CA is housed and covers the battery assembly CA, and includes an inner covering portion 100 in which a plurality of venting holes 110 are formed.

[0052] Specifically, the inner covering portion 100 is formed by insert injection molding plastic or composite material into the frame 140 shown in Figure 5. The frame 140 is molded from a metal material such as aluminum to serve as a framework for supporting the cover, and insulation is achieved by molding the inner covering portion 100 and the outer covering portion 300 together with plastic or the like. While a metal material would be advantageous for the frame 140, it is of course not limited to metal.

[0053] Furthermore, since the inner covering portion 100 is the part that directly faces the battery cell B, numerous venting holes 110 are formed therein. When the battery cell B deteriorates, gases and other substances are vented through the venting holes 110 of the inner covering portion 100.

[0054] On the other hand, the outer covering portion 300 can be insert-injected into the frame 140 together with the inner covering portion 100. The inner covering portion 100 covers the inside of the cover facing the battery assembly CA, preventing the propagation of flames, while the outer covering portion 300 covers the outer casing, blocking the propagation of flames to the outside. By insert-injecting the inner covering portion 100 and the outer covering portion 300 together into the frame 140, the fixation between them becomes firm and separation is impossible, so even when flames occur, they do not lift up or deform, and flames are reliably blocked.

[0055] The outer covering portion 300 covers the inner covering portion 100 from an externally separated area. This forms a venting space 130 between the outer covering portion 300 and the inner covering portion 100. Therefore, gases and flames vented through the venting holes 110 of the inner covering portion 100 are introduced into and guided into the venting space 130. In this case, since the outer covering portion 300 covers the outermost perimeter, gases and flames in the venting space 130 do not flow out to the outside (upwards) but are safely guided along a fixed path (sideways).

[0056] The venting space 130 is provided with an outer shielding section 320. The outer shielding section 320 is positioned in the venting space 130 and is located between adjacent venting holes 110, thereby dividing the venting space 130 into a number of venting channels 132. As shown in the figure, the venting space 130 is provided with a number of outer shielding sections 320 spaced apart from each other. This divides the venting space 130 into a number of outer shielding sections 320, which can form a number of venting channels 132. Therefore, gases and flames vented from each battery cell B are first vented through the venting holes 110 and flow into the venting channels 132, where they are safely guided laterally and discharged to the outside. Consequently, flames generated in any one battery cell B are guided by the venting channels 132 without flowing out, thus preventing flame propagation to other adjacent battery cells through other adjacent venting holes.

[0057] Figure 8 is a cross-sectional view of the battery module shown in Figure 7, cut along line AA, and Figure 9 is a cross-sectional view of the battery module shown in Figure 7, cut along line BB. Referring to these figures, the venting holes 110 of the inner covering portion 100 can be formed at positions corresponding to the battery cells B that constitute the battery assembly CA. In the illustrated embodiment, two battery cells B are stacked adjacent to each other to form a single bank. A bank is a set of one or more battery cells B, and a bank can be formed by three to four battery cells B. By providing pressure pads B10 between banks, it is possible to limit the swelling of the battery cells B, prevent the direct propagation of flames, and cool the battery cells B by heat transfer through the pressure pads B10.

[0058] The inner covering portion 100 of the present invention has venting holes 110 for gas venting, and the venting holes 110 may be formed in a position corresponding to the area above the battery cell B. In the illustrated embodiment, two battery cells B constitute one bank, and the venting holes 110 are formed in a position corresponding to that bank. In this case, the venting holes 110 are formed in positions corresponding to the two battery cells B.

[0059] Furthermore, the venting holes 110 of the inner covering portion 100 are extended longitudinally along the direction in which the battery cell B extends, so that even if gas is discharged at one point on the battery cell B, smooth gas venting is possible through the venting holes 110.

[0060] On the other hand, the inner covering portion 100 may include a metal frame 140 and a cover body 150 that is insert-injection molded into the frame 140. The cover body 150 may be formed on the same plane as the frame 140, as shown in Figure 6. The venting holes 110 may also be formed in the cover body 150. Therefore, since the venting holes 110 can be formed during the injection molding stage, additional hole processing is unnecessary, making manufacturing easier.

[0061] The battery assembly cover can be coupled to the case C via the edge of the frame 140. That is, since the frame 140 and the cover body 150 are formed on the same plane, when the cover is coupled to the case C via the frame 140, the separation space between the cover and the battery cells B can be reduced, thereby increasing the energy density. Furthermore, if the frame 140 is made of a metal material, coupling with the case C made of the same material can be facilitated.

[0062] On the other hand, the inner covering portion 100 may have an inner blocking portion 120 that protrudes toward the battery cell B. The inner blocking portion 120 is provided between adjacent battery cells B or between banks and can prevent flame propagation between the battery cells B or banks.

[0063] Specifically, as mentioned above, the venting holes 110 may have a shape that extends longitudinally along the direction in which the battery cells B are formed. Therefore, the inner shut-off section 120 may also extend longitudinally along the direction in which the battery cells B extend. Thus, gases and flames discharged from the battery cells B or bank corresponding to the venting holes 110 are shut off by the inner shut-off section 120 and vented only through the corresponding venting holes 110. Thus, direct flame propagation between the battery cells B inside the inner covering section 100 is prevented.

[0064] On the other hand, as shown in Figure 4, a mounting groove 122 may be provided in the longitudinal direction of the inner shielding portion 120. Then, as shown in Figures 8 and 9, the upper end of a pressure pad B10 located between adjacent battery cells B or banks may be inserted into the mounting groove 122. The pressure pad B10 blocks the direct propagation of flame and heat between the battery cells B or banks. By inserting the upper end of the pressure pad B10 into the mounting groove 122 and regulating its position, the pressure pad B10 is not pressed and its position is maintained in the event of a fire in a battery cell B, thereby stably blocking the propagation of flame between the battery cells B.

[0065] Furthermore, since the upper end of the pressure pad B10 is inserted into the inner shielding portion 120, the battery cell B or bank is surrounded and closed by the pressure pad B10 and the inner covering portion 100. Because it has a structure that communicates with the outside only through the venting holes 110, the generated gas and flames do not directly spread to adjacent battery cells B or banks, but are safely vented exclusively through the venting holes 110.

[0066] Furthermore, as shown in Figures 8 and 9, the inner shut-off portion 120 and the outer shut-off portion 320 can be formed at the same point on the inner covering portion 100, protruding in opposite directions from each other. This prevents gas or flames discharged into the venting hole 110 from transferring to adjacent venting channels, and ensures stable venting. Consequently, the outer shut-off portion 320 prevents gas or flames discharged into one venting hole 110 from flowing back in through other venting holes adjacent to the side and propagating to adjacent battery cells or banks.

[0067] In this way, with respect to the inner covering portion 100, the inner blocking portion 120 blocks the propagation of flames on the inside, and the outer blocking portion 320 blocks the propagation of flames on the outside. Because the inner blocking portion 120 and the outer blocking portion 320 are formed in the same position, the propagation of flames vented through a single venting hole 110 is completely blocked before and after venting.

[0068] Furthermore, the inner shut-off portion 120 and the outer shut-off portion 320 can be molded integrally with the inner covering portion 100 during insert injection molding. This reduces manufacturing costs and firmly connects the inner shut-off portion 120 and the outer shut-off portion 320, preventing deformation during fire or gas venting.

[0069] As shown in Figure 4 or Figure 9, a barrier wall 126 is formed between the ends of adjacent inner barrier sections 120, and the inner space 123 formed between the adjacent inner barrier sections 120 is not opened laterally by the barrier wall 126, but can communicate upward with the venting hole 110. That is, a battery cell B or bank is located between a pair of adjacent inner barrier sections 120, and gases and flames generated by the battery cell B are preferentially contained in the inner space 123. In this state, since the ends of the inner space 123 are blocked by the barrier wall 126, venting through the ends is blocked, and only upward venting through the venting hole 110 occurs. Therefore, the propagation of flames laterally from the battery assembly CA is blocked, thereby protecting high-voltage terminals, busbars, components, etc. located laterally and preventing electrical short circuits.

[0070] Furthermore, a clip portion 124 may be formed at the end of the inner shield portion 120, projecting toward the pressure pad B10 located between the battery cells B and gripping the pressure pad B10. The upper end of the pressure pad B10 is inserted into the mounting groove 122 of the inner shield portion 120, and the position of the end is firmly fixed by the clip portion 124, thereby more reliably blocking the propagation of flames. Moreover, if the clip portion 124 is molded together with the shield wall 126, the assembly rigidity can be reinforced to more reliably ensure flame blocking of the shield wall 126.

[0071] On the other hand, the outer covering portion 300 covers the inner covering portion 100 from an externally separated location, thereby preventing the venting holes 110 from being directly exposed to the outside. Therefore, by ensuring that the venting holes 110 communicate with the outside laterally only through the venting channels 132, direct discharge of gas and flames upward of the battery module M is prevented, thereby reducing the direct offensiveness of the flames to the pack leads of the battery pack BP and protecting the passenger seats of the vehicle. In electric vehicles and the like, when the battery pack is installed below the passenger seats of the vehicle, if flames propagate directly upward of the battery pack, it inevitably becomes detrimental to the protection of the passenger seats. In the present invention, by guiding the flames to the side of the battery module, the upward offensiveness of the flames can be reduced at the level of the battery pack.

[0072] Furthermore, by opening the end of the outer covering portion 300, the venting space 130 can be opened at the end of the outer covering portion 300. With this structure, the flame generated in the battery cell B is blocked by the inner blocking portion 120 and the blocking wall 126, and is discharged only upward through the venting hole 110. The flame discharged upward through the venting hole 110 is then blocked again by the outer covering portion 300 and guided only laterally by the venting channel 132. It is then discharged through the open end of the venting channel 132. Therefore, the flame generated in the battery cell B is guided along a path that has been bent multiple times, greatly reducing the aggressiveness of the flame, and the flammable particles contained in the gas and flame remain there as their kinetic energy naturally decreases, thereby reducing the outflow to the outside of the battery module M.

[0073] In particular, as the flame is guided, the pressure pad B10 and the inner shielding portion 120 prevent direct propagation to adjacent battery cells B on the side, and the shielding wall 126 and clip portion 124 also block direct propagation to high-voltage components. Furthermore, the outer shielding portion 320 blocks reverse propagation to other adjacent venting holes 110. As a result, flame propagation to adjacent battery cells B is blocked by multiple shielding structures, greatly improving the overall safety of the battery module M and battery pack BP.

[0074] The battery assembly cover of the present invention is coupled to a battery module or assembly to cover the internal battery assembly, and in the event of gas or flame generation due to deterioration of battery cells, it effectively prevents flame propagation between adjacent battery cells, minimizes flame propagation to the outside of the battery module, and allows gas and other substances to be smoothly vented.

[0075] In particular, by primarily preventing direct flame propagation between adjacent battery cells inside the cover, and secondarily effectively preventing flame propagation through venting holes outside the cover, while also allowing gas to vent smoothly through the cover, it is possible to provide a structure that is most effective in preventing or delaying fire spread.

[0076] Figure 10 shows a battery pack BP with such a battery assembly cover applied mounted on a vehicle V. Although the illustrated embodiment shows the case of vehicle V, the battery assembly cover and battery pack according to the present invention can be applied to the battery systems of various vehicles such as internal combustion engine vehicles, electric vehicles, hybrid vehicles, and fuel cell vehicles. In addition to vehicles, they can also be applied to battery systems in various fields such as industrial energy storage systems (ESS) or household energy storage systems (ESS), and small battery packs.

[0077] Although the present invention has been described with reference to specific embodiments, it will be apparent to those with ordinary skill in the art that the present invention can be improved and modified in various ways without departing from the technical spirit of the invention as defined by the following claims. [Explanation of Symbols]

[0078] 100 Inner covering part 110 Venting Hall 120 Inner shielding section 122 Mounting groove 123 Interior space 124 Clip section 126 Barrier wall 130 Venting Space 132 Venting Channels 140 frames 150 Cover Body 300 Outer covering part 320 Outer blocking part B Battery Cell B10 Pressure Pad BP Battery Pack C Case CA Battery Assembly M module V Vehicle

Claims

1. An inner covering portion is coupled to a case containing a battery assembly, covering the battery assembly, and having multiple venting holes formed therein. An outer covering portion covers the inner covering portion on the outside, separated from the inner covering portion, and forms a venting space between itself and the inner covering portion, A battery assembly cover comprising a plurality of outer shielding portions arranged in the venting space and provided between adjacent venting holes, dividing the venting space into a plurality of spaces.

2. The battery assembly cover according to claim 1, wherein the venting holes in the inner covering portion are formed at positions corresponding to the battery cells constituting the battery assembly.

3. The battery assembly cover according to claim 1 or 2, wherein the venting holes in the inner covering portion extend longitudinally along the direction in which the battery cells extend.

4. The battery assembly cover according to claim 1 or 2, wherein the inner covering portion includes a frame made of metal material and a cover body insert-injected into the frame.

5. The battery assembly cover according to claim 4, wherein the cover body is formed on the same plane as the frame.

6. The battery assembly cover according to claim 4, wherein the venting holes are formed in the cover body.

7. The battery assembly cover according to claim 4, wherein the battery assembly cover is coupled to the case via the edge of the frame.

8. The battery assembly cover according to claim 1 or 2, further comprising an inner shielding portion that protrudes toward the battery cell side from the inner covering portion.

9. The battery assembly cover according to claim 8, wherein the inner shielding portion is provided between adjacent battery cells to prevent flame propagation between the battery cells.

10. The battery assembly cover according to claim 8, wherein the inner blocking portion and the outer blocking portion are formed protruding in opposite directions from each other at the same point on the inner covering portion.

11. The battery assembly cover according to claim 8, wherein the inner shielding portion and the outer shielding portion are molded integrally with the inner covering portion.

12. The battery assembly cover according to claim 8, wherein the inner shielding portion is provided between adjacent venting holes to prevent flame propagation between the venting holes.

13. The battery assembly cover according to claim 8, wherein the inner shielding portion extends longitudinally along the direction in which the battery cells extend, and mounting grooves extend longitudinally in the inner shielding portion.

14. The battery assembly cover according to claim 13, wherein the end of a pressure pad located between adjacent battery cells is inserted into the mounting groove.

15. A shielding wall is formed between the ends of adjacent inner shielding portions, and the inner space formed between adjacent inner shielding portions is shielded by the shielding wall and communicates with the venting hole, as described in claim 8.

16. The battery assembly cover according to claim 8, wherein a clip portion is formed at the end of the inner shielding portion, protruding toward the pressure pad located between the battery cells and gripping the pressure pad.

17. The battery assembly cover according to claim 1 or 2, wherein the outer covering portion covers the inner covering portion on the outside, separated from the inner covering portion, so that the venting holes are not exposed to the outside.

18. The battery assembly cover according to claim 1 or 2, wherein the end of the outer covering portion is opened, thereby opening the venting space at the end of the outer covering portion.

19. The battery assembly cover according to claim 1 or 2, wherein the venting space is divided by the plurality of outer shielding portions to form a plurality of venting channels.

20. The battery assembly cover according to claim 1 or 2, wherein the inner covering portion and the outer covering portion are connected via the outer shielding portion, and the inner covering portion, the outer covering portion and the outer shielding portion are integrally molded.

21. A battery pack comprising a battery assembly cover according to claim 1 or 2.

22. A vehicle comprising a battery assembly cover according to claim 1 or 2.

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