Battery and battery pack

Abstract

This application discloses a battery and a battery pack having three mutually perpendicular directions: a first direction, a second direction, and a third direction. The battery pack includes: a housing with a receiving cavity having an opening at one end along the first direction; a pressure relief structure connected to the housing; a cover plate connected to the housing and closing the opening; a frame with a receiving cavity, the frame being housed within the receiving cavity; and a battery cell housed within the receiving cavity. The frame includes a first sidewall and a second sidewall. The first sidewall is perpendicular to the first direction, and the second sidewall is perpendicular to the third direction. The first sidewall is located between the cover plate and the battery cell, and the second sidewall has a vent penetrating along the third direction. The frame serves to confine and restrain gas, which then exits through the vent and flows towards the housing. The housing also serves to confine and restrain the gas. As the gas pressure increases, the gas will break through the pressure relief structure, completing the pressure relief and reducing the direct flow of gas towards the weld area, thus lowering the risk of battery casing explosion and improving safety.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to batteries and battery packs. Background Technology

[0002] In existing technology, the battery casing and cover are connected by welding, forming a weld between them. When the battery experiences thermal runaway, gas accumulates in the area corresponding to the weld inside the battery, causing a sharp increase in gas pressure. This leads to the weld cracking and forming a fissure (also known as the casing explosion phenomenon), instead of releasing pressure through an explosion-proof valve, resulting in poor safety. Summary of the Invention

[0003] This application aims to provide a battery and battery pack to solve the safety problem of existing batteries releasing pressure by means of casing explosion.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application propose a battery having two mutually perpendicular first directions, a second direction, and a third direction, comprising: a housing having a receiving cavity, the receiving cavity having an opening at one end along the first direction; a pressure relief structure connected to the housing; a cover plate connected to the housing and closing the opening; a frame having a receiving cavity, the frame being housed in the receiving cavity; and a battery cell being housed in the receiving cavity; the frame includes a first sidewall and a second sidewall, the first sidewall being perpendicular to the first direction, the second sidewall being perpendicular to the third direction, the first sidewall being located between the cover plate and the battery cell, and the second sidewall having an exhaust port penetrating along the third direction.

[0005] According to some embodiments of the present invention, the first sidewall has a first inner side facing the battery cell, and the first inner side has a first vent groove extending along the third direction, the vent being located at the end of the first vent groove along the third direction and communicating with the first vent groove.

[0006] According to some embodiments of the present invention, the second sidewall further has a first exhaust channel extending through the third direction, the first exhaust channel communicating with the receiving cavity, and the first exhaust channel extending along the first direction.

[0007] According to some embodiments of the present invention, the first sidewall has a first inner side facing the battery cell, the second sidewall has a second inner side facing the battery cell, and the inner side of the frame also has a third inner side. One end of the first inner side along the third direction is connected to the third inner side, and one end of the second inner side along the first direction is connected to the third inner side. The battery cell has a first outer side, a second outer side, and a third outer side. The first outer side and the first inner side are disposed opposite to each other, and the second outer side and the second inner side are disposed opposite to each other. One end of the first outer side along the third direction is connected to the third outer side, and one end of the second outer side along the first direction is connected to the third outer side. The third inner side and the third outer side are disposed opposite to each other and define a second exhaust channel, which communicates with the exhaust port.

[0008] According to some embodiments of the present invention, the third inner surface is an arc surface that is concave away from the third outer surface; and / or, the third outer surface is an arc surface that is convex toward the third inner surface.

[0009] According to some embodiments of the present invention, the third inner surface has a recessed second vent groove that extends along the second direction.

[0010] According to some embodiments of the present invention, the inner side of the frame further has a fourth inner side and a fifth inner side, one end of the first inner side along the second direction is connected to the fifth inner side, and one end of the fourth inner side along the first direction is connected to the fifth inner side; the battery cell has a fourth outer side and a fifth outer side, the fourth inner side and the fourth outer side are disposed opposite to each other, one end of the first outer side along the second direction is connected to the fifth outer side, and one end of the fourth outer side along the first direction is connected to the fifth outer side; the fifth inner side and the fifth outer side are disposed opposite to each other and define a third exhaust channel, the third exhaust channel and the exhaust... The opening is connected; and / or, the inner side of the frame also has a fourth inner side and a sixth inner side, one end of the second inner side along the second direction is connected to the sixth inner side, and one end of the fourth inner side along the third direction is connected to the sixth inner side; the battery cell has a fourth outer side and a sixth outer side, the fourth inner side and the fourth outer side are disposed opposite to each other, one end of the second outer side along the second direction is connected to the sixth outer side, and one end of the fourth outer side along the third direction is connected to the sixth outer side; the sixth inner side and the sixth outer side are disposed opposite to each other and define a fourth exhaust channel, the fourth exhaust channel and the exhaust port are connected.

[0011] According to some embodiments of the present invention, the battery further includes a protective film, and one end of the storage cavity along the second direction has a mounting port, the protective film being connected to the frame and sealing the mounting port.

[0012] According to some embodiments of the present invention, the second sidewall is located between the pressure relief structure and the battery cell.

[0013] Secondly, embodiments of this application propose a battery pack including the battery described above.

[0014] In the embodiments of this application, the beneficial effects are as follows: when the battery thermally fails, a large amount of gas is generated. The housing cavity of the frame plays a certain role in restricting and confining the gas. Then the gas is discharged from the frame through the exhaust port and flows into the shell. The shell also plays a certain role in restricting and confining the gas. As the gas pressure increases, the gas will break through the pressure relief structure to complete the pressure relief, reduce the gas from flowing directly into the weld area, reduce the risk of battery casing explosion, and the battery releases gas through the pressure relief structure to achieve pressure relief and heat dissipation, thereby improving the safety of the battery.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of an explosion of a battery according to an embodiment of the present invention; Figure 2 This is one of the schematic diagrams of the battery frame according to an embodiment of the present invention; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is a second schematic diagram of the battery frame according to an embodiment of the present invention; Figure 5 This is a schematic diagram of a battery along a second direction according to an embodiment of the present invention; Figure 6 yes Figure 5 Enlarged partial sectional view at point B in the middle; Figure 7 This is a schematic diagram of a battery along a third direction according to an embodiment of the present invention; Figure 8 yes Figure 7 Enlarged sectional view of point C in the middle; Figure 9 This is a schematic diagram of a battery along a first direction according to an embodiment of the present invention; Figure 10 Figure 9 Enlarged partial sectional view at point D; Casing 100; Pressure relief structure 110; Cover plate 200; pole post 210; Frame 300; exhaust port 310; first side wall 320; first exhaust groove 321; first inner side 322; second side wall 330; first exhaust channel 331; second inner side 332; mounting port 340; third inner side 350; second exhaust groove 351; fourth inner side 360; fifth inner side 370; sixth inner side 380; clearance hole 390; Cell 400; First outer side 410; Second outer side 420; Third outer side 430; Fourth outer side 440; Fifth outer side 450; Sixth outer side 460; Protective film 500; Fourth exhaust channel 800; Second exhaust passage 600; Third exhaust channel 700. Detailed Implementation

[0017] Embodiments of the present invention will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0018] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] As mentioned before, when a battery experiences thermal runaway, gas accumulates inside the battery and the gas pressure increases. The gas directly impacts the weld seams of the casing, causing the casing to explode, resulting in poor safety.

[0022] The following is combined Figures 1 to 10 A battery and battery pack according to an embodiment of the present invention are described.

[0023] like Figure 1 and Figure 2 As shown, a battery according to some embodiments of the present invention includes a casing 100, a pressure relief structure 110, a cover plate 200, a frame 300, and a battery cell 400.

[0024] like Figure 1 As shown, the housing 100 has a receiving cavity with an opening at one end along the first direction. The cover plate 200 is connected to the housing 100 and closes the opening. The cover plate 200 and the housing 100 are connected by welding to form a weld. The frame 300 is housed in the receiving cavity and has a storage cavity. The battery cell 400 is housed in the storage cavity. The frame 300 serves to fix the battery cell 400, and the housing 100 serves to fix the frame 300.

[0025] The housing 100 includes a large surface perpendicular to a second direction and a bottom surface perpendicular to a third direction. The first, second, and third directions are mutually perpendicular. Generally, the first direction is the length direction of the battery, the second direction is the width or thickness direction of the battery, and the third direction is the height direction of the battery. The large surface and the bottom surface surround a receiving cavity. A pressure relief structure 110 is connected to the housing 100.

[0026] Understandably, the cover plate 200 is provided with a terminal post 210, and correspondingly, the frame 300 is provided with a clearance hole 390 in the area corresponding to the terminal post 210. The battery cell 400 includes a battery cell body and a tab, and the tab extends out of the frame 300 through the clearance hole 390 and is electrically connected to the terminal post 210. Components such as liquid injection holes may also be provided on the cover plate 200, its large surface, or its bottom surface.

[0027] like Figure 1 As shown, the frame 300 includes a first sidewall 320 and a second sidewall 330. The first sidewall 320 is perpendicular to a first direction and is correspondingly disposed with the cover plate 200. The first sidewall 320 is located between the cover plate 200 and the battery cell 400. The second sidewall 330 is perpendicular to a third direction and is correspondingly disposed with the bottom surface. Further details are provided below. Figure 2 and Figure 3 As shown, the second sidewall 330 has an exhaust port 310 extending in a third direction. When the battery experiences thermal failure, a large amount of gas is generated. The frame 300 provides a path to guide the gas out of the frame 300 through the exhaust port 310 and flow towards the housing 100. As the gas pressure increases, the gas will break through the pressure relief structure 110, completing the pressure relief. First, the first sidewall 320 separates the cell 400 and the cover plate 200, making it difficult for the gas to directly impact the cover plate 200. Second, the exhaust port 310 is located on the second sidewall 330, and the cover plate 200 and the exhaust port 310 are located on different sides of the cell 400, making it difficult for the gas to concentrate in the weld area, reducing the direct flow of gas to the weld area, and lowering the risk of battery casing explosion. The battery releases gas through the pressure relief structure 110 to achieve pressure relief and heat dissipation, improving battery safety.

[0028] In some embodiments of the present invention, such as Figure 2 or Figure 4 As shown, the first sidewall 320 has a first inner side surface 322 facing the battery cell 400. The first inner side surface 322 has a first exhaust groove 321 extending in a third direction. The exhaust port 310 is located at the end of the first exhaust groove 321 in the third direction and communicates with the first exhaust groove 321. The gas released by the battery cell 400 can enter the first exhaust groove 321 in time and flow to the exhaust port 310 under the guidance of the first exhaust groove 321, which is beneficial to improving the efficiency of gas discharge to the exhaust port 310 and the pressure relief structure 110.

[0029] An exhaust port 310 is formed on the second sidewall 330 and extends through the second sidewall 330 in a third direction. The number of exhaust ports 310 on the second sidewall 330 is equal to the number of first exhaust grooves 321 on the first inner sidewall 322, and the exhaust ports 310 and first exhaust grooves 321 are arranged in a one-to-one correspondence. The cross-sectional shape of the exhaust port 310 is the same as the cross-sectional shape of the first exhaust groove 321, and the cross-sectional size of the exhaust port 310 is the same as the cross-sectional size of the first exhaust groove 321. It can be understood that the cross-sectional area of ​​the first exhaust groove 321 gradually increases in the third direction, and the cross-sectional area of ​​the exhaust port 310 is larger than the cross-sectional area of ​​any region of the first exhaust groove 321, which is beneficial for gas discharge.

[0030] In some embodiments of the present invention, such as Figures 2 to 4 As shown, the second sidewall 330 also has a first exhaust channel 331 extending along a third direction. The first exhaust channel 331 communicates with the receiving cavity, and the gas in the receiving cavity can be discharged to the receiving cavity through the first exhaust channel 331 and flow towards the inner wall of the housing 100, and then discharged from the pressure relief structure 110. The first exhaust channel 331 extends along a first direction, and the exhaust port 310 and the first exhaust channel 331 are arranged along the first direction, so that the overall cross-sectional area of ​​all the first exhaust channels 331 is large, which is beneficial to improving exhaust efficiency and reducing weight.

[0031] In one embodiment, the pressure relief structure 110 is connected to the area of ​​the housing 100 corresponding to the second sidewall 330. The second sidewall 330 is located between the pressure relief structure 110 and the battery cell 400. The battery cell 400, the first exhaust channel 331 and the pressure relief structure 110 are arranged sequentially along the third direction, so that the gas passing through the first exhaust channel 331 can be directly discharged to the pressure relief structure 110.

[0032] It is conceivable that the first exhaust channel 331 can be one or more combinations of straight lines, wavy lines, and zigzag lines. A perforated pattern can also be provided on the second sidewall 330.

[0033] In some embodiments of the present invention, such as Figure 4 , Figure 5 and Figure 6 As shown, the first sidewall 320 has a first inner surface 322 facing the battery cell 400, the second sidewall 330 has a second inner surface 332 facing the battery cell 400, and the inner side of the frame 300 also has a third inner surface 350. One end of the first inner surface 322 along a third direction is connected to the third inner surface 350, and one end of the second inner surface 332 along a first direction is connected to the third inner surface 350; further as... Figure 1As shown, the battery cell 400 has a first outer surface 410, a second outer surface 420, and a third outer surface 430. The first outer surface 410 is disposed opposite to the first inner surface 322, and the second outer surface 420 is disposed opposite to the second inner surface 332. One end of the first outer surface 410 along a third direction is connected to the third outer surface 430, and one end of the second outer surface 420 along a first direction is connected to the third outer surface 430. Figure 4 and Figure 6 As shown, the third inner side 350 and the third outer side 430 are positioned opposite each other, defining the second exhaust passage 600, as... Figure 6 As shown, the second exhaust channel 600 is connected to the exhaust port 310. When the gas generated by the battery thermal runaway escapes to the surroundings, it can enter the second exhaust channel 600 and then be discharged to the exhaust port 310 through the second exhaust channel 600. The second exhaust channel 600 has a certain function of collecting and buffering gas, which is conducive to the concentrated discharge of gas to the exhaust port 310. Figure 4 and Figure 6 As shown, the length of the second exhaust passage 600 extends along the second direction.

[0034] The specific configuration of the third inner surface 350 can be achieved through the following embodiments: like Figure 4 or Figure 6 As shown, in one embodiment, the third inner surface 350 is an arc surface that is recessed away from the third outer surface 430, so that the third inner surface 350 and the third outer surface 430 define the second exhaust channel 600. The arrangement of the third inner surface 350 makes the second exhaust channel 600 easy to process. The second exhaust channel 600 can be formed by installing the battery cell 400 into the storage cavity.

[0035] Alternatively, in another embodiment, the third outer surface 430 is an arc surface that protrudes toward the third inner surface 350, such that the third inner surface 350 and the third outer surface 430 define the second exhaust channel 600. The arrangement of the third outer surface 430 makes the second exhaust channel 600 easy to process, and the second exhaust channel 600 can be formed by installing the battery cell 400 into the storage cavity.

[0036] Alternatively, in another embodiment, the third inner surface 350 is an arc surface that is concave away from the third outer surface 430, and the third outer surface 430 is an arc surface that is convex towards the third inner surface 350, so that the third inner surface 350 and the third outer surface 430 define the second exhaust channel 600. The arrangement of the third outer surface 430 and the third inner surface 350 makes the second exhaust channel 600 easy to process. The second exhaust channel 600 can be formed by installing the battery cell 400 into the storage cavity.

[0037] In some embodiments of the present invention, such as Figure 3 or Figure 6 As shown, the third inner surface 350 has a recessed second exhaust groove 351. The second exhaust groove 351 extends along the second direction and is connected to the second exhaust channel 600. The second exhaust groove 351 can be understood as a part of the second exhaust channel 600. The setting of the second exhaust groove 351 can increase the effective exhaust area of ​​the second exhaust channel 600, and has the function of collecting and buffering gas. It is beneficial to exhaust gas and relieve pressure, and can prevent the second exhaust channel 600 from being completely blocked due to the expansion of the battery cell 400.

[0038] In this application, a channel communicating with the exhaust port 310 is formed in the corner area of ​​the frame 300 and the cell 400, allowing gas and heat released from the corner area of ​​the cell 400 to be discharged through the exhaust port 310, reducing the probability of exhaust dead zones within the battery. For example, in one embodiment, as... Figure 4 As shown, the inner side of the frame 300 also has a fourth inner side 360 ​​and a fifth inner side 370. One end of the first inner side 322 along the second direction is connected to the fifth inner side 370, and one end of the fourth inner side 360 ​​along the first direction is connected to the fifth inner side 370; further as... Figure 1 As shown, the battery cell 400 has a fourth outer side 440 and a fifth outer side 450, and the fourth inner side 360 ​​and the fourth outer side 440 are disposed opposite each other. One end of the first outer side 410 along the second direction is connected to the fifth outer side 450, and one end of the fourth outer side 440 along the first direction is connected to the fifth outer side 450; further as... Figure 4 , Figure 7 and Figure 8 As shown, the fifth inner surface 370 and the fifth outer surface 450 are arranged opposite to each other, defining a third exhaust channel 700, which is connected to the exhaust port 310. When the gas generated by battery thermal runaway escapes to the surroundings, it can enter the third exhaust channel 700 and then be discharged to the exhaust port 310 through the third exhaust channel 700. The third exhaust channel 700 has a certain function of collecting and buffering gas, which is conducive to the concentrated discharge of gas to the exhaust port 310. Figure 4 and Figure 8 As shown, the length of the third exhaust passage 700 extends along the third direction.

[0039] The frame 300 also includes a third sidewall, which is perpendicular to the second direction and is arranged in relation to the large surface. The first sidewall 320, the second sidewall 330 and the third sidewall form a storage cavity. The inner wall of the third sidewall is a fourth inner surface 360, which faces the battery cell 400.

[0040] Alternatively, in another embodiment, such as Figure 4As shown, the inner side of the frame 300 also has a fourth inner side 360 ​​and a sixth inner side 380. One end of the second inner side 332 along the second direction is connected to the sixth inner side 380, and one end of the fourth inner side 360 ​​along the third direction is connected to the sixth inner side 380; further as... Figure 1 As shown, the battery cell 400 has a fourth outer surface 440 and a sixth outer surface 460, the fourth inner surface 360 ​​and the fourth outer surface 440 are disposed opposite to each other, one end of the second outer surface 420 along the second direction is connected to the sixth outer surface 460, and one end of the fourth outer surface 440 along the third direction is connected to the sixth outer surface 460; further as... Figure 4 , Figure 9 and Figure 10 As shown, the sixth inner surface 380 and the sixth outer surface 460 are arranged opposite to each other, defining a fourth exhaust channel 800, which is connected to the exhaust port 310. When the gas generated by battery thermal runaway escapes to the surroundings, it can enter the fourth exhaust channel 800 and then be discharged to the exhaust port 310 through the fourth exhaust channel 800. The fourth exhaust channel 800 has a certain function of collecting and buffering gas, which is conducive to the concentrated discharge of gas to the exhaust port 310. Figure 4 and Figure 10 As shown, the length of the fourth exhaust channel 800 extends along the third direction.

[0041] The frame 300 also includes a third sidewall, which is perpendicular to the second direction and is arranged in relation to the large surface. The first sidewall 320, the second sidewall 330 and the third sidewall form a storage cavity. The inner wall of the third sidewall is a fourth inner surface 360, which faces the battery cell 400.

[0042] Of course, in other embodiments, a third exhaust channel 700 and a fourth exhaust channel 800 can also be provided simultaneously. One end of the second exhaust channel 600, one end of the third exhaust channel 700 and one end of the fourth exhaust channel 800 are connected. The arrangement of the second exhaust channel 600, the third exhaust channel 700 and the fourth exhaust channel 800 can guide the gas that is escaping to the surroundings to the exhaust port 310 as much as possible, reduce the exhaust dead zone formed in the frame 300, and enable the battery to cope with thermal runaway in various areas of the cell 400.

[0043] Specifically, such as Figure 4As shown, the frame 300 also includes a third sidewall, which is perpendicular to the second direction and corresponds to the large surface. The first sidewall 320, the second sidewall 330, and the third sidewall form a storage cavity. The fifth inner surface 370 is formed by the first sidewall 320 and the third sidewall. A portion of the first inner surface 322 along the second direction, a portion of the fourth inner surface 360 ​​along the first direction, and the intersection area between the first inner surface 322 and the fourth inner surface 360 ​​constitute the fifth inner surface 370. The fifth inner surface 370 is a right-angled surface. Of course, the fifth inner surface 370 can also be an arc surface that is concave away from the fifth outer surface 450 or an arc surface that is convex towards the fifth outer surface 450.

[0044] The sixth inner surface 380 is formed by the second sidewall 330 and the third sidewall. A portion of the second inner surface 332 along the second direction, a portion of the fourth inner surface 360 ​​along the third direction, and the intersection area between the second inner surface 332 and the fourth inner surface 360 ​​constitute the sixth inner surface 380. The sixth inner surface 380 is a right-angled surface. Alternatively, the sixth inner surface 380 can be an arcuate surface concave away from the sixth outer surface 460 or an arcuate surface convex towards the sixth outer surface 460.

[0045] In some embodiments of the present invention, such as Figure 1 or Figure 2 or Figure 4 As shown, the battery also includes a protective film 500. One end of the storage cavity along the second direction has an installation port 340. The installation port 340 facilitates the installation of the battery cell 400 into the storage cavity of the frame 300. The protective film 500 is connected to the frame 300 and closes the installation port 340, thereby confining the battery cell 400 within the storage cavity of the frame 300.

[0046] The protective film 500 is a Mylar film, also known as polyester film. The protective film 500 can be attached to one end of the first sidewall 320 along the second direction and the other end of the second direction of the second sidewall 330 by adhesive. The protective film 500 is the third sidewall of the frame 300. The side of the protective film 500 facing the battery cell 400 is the fourth inner sidewall 360.

[0047] It is understandable that the inner side of the frame 300 is provided with multiple protrusions, and a third exhaust groove is formed between two adjacent protrusions. The third exhaust groove is connected to the exhaust port 310. The protrusions abut against the outer side of the battery cell 400. The protrusions separate the inner side of the frame 300 from the outer side of the battery cell 400, and the gas can directly enter the third exhaust groove and then enter the exhaust port 310.

[0048] According to some embodiments of the present invention, a battery pack includes the battery described above. The battery in the battery pack is further enhanced by adding a frame 300 and providing an exhaust port 310 on the frame 300. The exhaust port 310 reduces the direct impact of gas on the battery welds during battery thermal failure, directing the gas to a pressure relief structure 110. The pressure relief structure 110 achieves both venting and pressure relief, reducing the risk of battery casing explosion and improving battery safety, while further ensuring the safety of the battery pack.

[0049] Other components of the battery pack according to embodiments of the present invention, such as the battery pack casing, are known to those skilled in the art and will not be described in detail here.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery having a first direction, a second direction, and a third direction that are mutually perpendicular to each other, characterized in that, include: The housing (100) has a receiving cavity, one end of which has an opening along the first direction; A pressure relief structure (110) is connected to the housing (100). A cover plate (200) is attached to the housing (100) and closes the opening; A frame (300) has a receiving cavity, and the frame (300) is housed in the receiving cavity; The battery cell (400) is housed in the receiving cavity; The frame (300) includes a first sidewall (320) and a second sidewall (330), the first sidewall (320) being perpendicular to the first direction and the second sidewall (330) being perpendicular to the third direction. The first sidewall (320) is located between the cover plate (200) and the battery cell (400), and the second sidewall (330) has an exhaust port (310) extending through the third direction.

2. The battery according to claim 1, characterized in that, The first sidewall (320) has a first inner side surface (322) facing the cell (400), and the first inner side surface (322) has a first vent groove (321) extending along the third direction. The vent (310) is located at the end of the first vent groove (321) along the third direction and communicates with the first vent groove (321).

3. The battery according to claim 2, characterized in that, The second sidewall (330) also has a first exhaust channel (331) extending through the third direction, the first exhaust channel (331) communicating with the receiving cavity, and the first exhaust channel (331) extending along the first direction.

4. The battery according to claim 1, characterized in that, The first sidewall (320) has a first inner side surface (322) facing the battery cell (400), the second sidewall (330) has a second inner side surface (332) facing the battery cell (400), and the inner side of the frame (300) also has a third inner side surface (350). One end of the first inner side surface (322) along the third direction is connected to the third inner side surface (350), and one end of the second inner side surface (332) along the first direction is connected to the third inner side surface (350). The battery cell (400) has a first outer side (410), a second outer side (420) and a third outer side (430). The first outer side (410) is disposed opposite to the first inner side (322), and the second outer side (420) is disposed opposite to the second inner side (332). One end of the first outer side (410) along the third direction is connected to the third outer side (430), and one end of the second outer side (420) along the first direction is connected to the third outer side (430). The third inner side (350) is disposed opposite to the third outer side (430) and defines a second exhaust passage (600), which is connected to the exhaust port (310).

5. The battery according to claim 4, characterized in that, The third inner surface (350) is an arc surface that is concave away from the third outer surface (430); And / or, the third outer surface (430) is an arc surface that protrudes toward the third inner surface (350).

6. The battery according to claim 4, characterized in that, The third inner surface (350) has a recessed second exhaust groove (351) that extends along the second direction.

7. The battery according to claim 4, characterized in that, The inner side of the frame (300) also has a fourth inner side (360) and a fifth inner side (370), one end of the first inner side (322) along the second direction is connected to the fifth inner side (370), and one end of the fourth inner side (360) along the first direction is connected to the fifth inner side (370). The battery cell (400) has a fourth outer side (440) and a fifth outer side (450), the fourth inner side (360) and the fourth outer side (440) are disposed opposite to each other, one end of the first outer side (410) along the second direction is connected to the fifth outer side (450), and one end of the fourth outer side (440) along the first direction is connected to the fifth outer side (450). The fifth inner side surface (370) and the fifth outer side surface (450) are arranged opposite to each other and define a third exhaust channel (700), which is connected to the exhaust port (310); And / or, The inner side of the frame (300) also has a fourth inner side (360) and a sixth inner side (380), one end of the second inner side (332) along the second direction is connected to the sixth inner side (380), and one end of the fourth inner side (360) along the third direction is connected to the sixth inner side (380). The battery cell (400) has a fourth outer side (440) and a sixth outer side (460), the fourth inner side (360) and the fourth outer side (440) are disposed opposite to each other, one end of the second outer side (420) along the second direction is connected to the sixth outer side (460), and one end of the fourth outer side (440) along the third direction is connected to the sixth outer side (460). The sixth inner side (380) and the sixth outer side (460) are arranged opposite to each other and define a fourth exhaust channel (800), which is connected to the exhaust port (310).

8. The battery according to claim 1, characterized in that, The battery also includes a protective film (500), and the storage cavity has an installation port (340) at one end along the second direction. The protective film (500) is connected to the frame (300) and closes the installation port (340).

9. The battery according to claim 1, characterized in that, The second sidewall (330) is located between the pressure relief structure (110) and the battery cell (400).

10. A battery pack, characterized in that, Includes the battery according to any one of claims 1 to 9.

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