Battery, battery pack and electric device

Abstract

The utility model relates to battery technical field discloses a battery, battery package and electrical equipment, and the battery includes casing, lid, lower insulating piece and electrode assembly, casing and lid are connected along the first direction and form the accommodating cavity, lower insulating piece, electrode assembly are connected in the accommodating cavity, and lower insulating piece is located between electrode assembly and lid, lower insulating piece includes insulating main part and boss, in the first direction, one side of insulating main part is connected with lid, and the other side is connected with boss, and boss contacts with electrode assembly, wherein, the boss has the air passage along the second direction through setting, along the second direction, the cavity wall surface of accommodating cavity towards boss forms the exhaust groove, and the exhaust groove is communicated with the air passage, based on the setting of air passage and exhaust groove, the gas produced by battery thermal runaway can flow smoothly in the battery, the battery can exhaust quickly, and the pressure relief effect is good.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery, battery pack and electrical equipment. Background Technology

[0002] In the battery, the lower insulating component is placed between the electrode assembly and the top cover to provide insulation. In related technologies, the side of the lower insulating component facing the electrode assembly has a protrusion. The protrusion contacts the electrode assembly and serves to support and fix the electrode assembly, preventing it from moving up and down. However, when the battery experiences thermal runaway, the presence of the protrusion can obstruct gas flow, resulting in poor pressure relief of the battery. Utility Model Content

[0003] The primary objective of this invention is to propose a battery with good pressure relief performance.

[0004] To achieve the above objectives, this utility model provides a battery having intersecting first and second directions, including a casing, a cover, a lower insulating member, and an electrode assembly;

[0005] The shell and the cover are connected along the first direction to form a receiving cavity;

[0006] The lower insulating member and the electrode assembly are connected within the receiving cavity, and the lower insulating member is disposed between the electrode assembly and the cover.

[0007] The lower insulating component includes an insulating body and a boss. In the first direction, one side of the insulating body is connected to the cover, and the other side is connected to the boss. The boss is in contact with the electrode assembly.

[0008] The boss has an air passage extending along the second direction, and the housing has an exhaust groove on the side facing the boss, the exhaust groove being connected to the air passage.

[0009] In a specific embodiment of this utility model, in the first direction, the side of the insulating body facing the cover is a first surface, the insulating body has a first groove, the first groove is disposed on the first surface, and the first groove penetrates the boss along the second direction to form the air passage.

[0010] In a specific embodiment of this utility model, in the first direction, the side of the boss facing the electrode assembly is a second surface, the boss has a second groove, the second groove is disposed on the second surface, and the second groove penetrates the boss along the second direction to form the air passage.

[0011] In a specific embodiment of this utility model, in the first direction, the side of the insulating body facing the cover is a first surface, the side of the boss facing the electrode assembly is a second surface, and the air passage is located between the first surface and the second surface.

[0012] In a specific embodiment of this utility model, the lower insulating member further includes a support body, which is disposed within the air passage, and both ends of the support body are connected to the inner wall surface of the air passage along the first direction.

[0013] In a specific embodiment of this invention, the exhaust groove extends along the first direction.

[0014] In a specific embodiment of this utility model, the battery further has a third direction, wherein the first direction, the second direction, and the third direction intersect each other;

[0015] The battery also includes protrusions. Along the second direction, a plurality of protrusions are connected to the cavity wall surface of the receiving cavity facing the boss. The length direction of the protrusions extends along the first direction. The plurality of protrusions are spaced apart along the third direction. Along the third direction, the exhaust groove is formed between two adjacent protrusions.

[0016] In a specific embodiment of this utility model, the battery further includes an insulating film disposed in the receiving cavity, the insulating film covering the electrode assembly, and an opening is formed at one end of the insulating film near the cover along the first direction;

[0017] The lower insulating member is connected to the insulating film, and the boss passes through the opening and is inserted into the insulating film;

[0018] In the second direction, the insulating film has a clearance opening that faces the air passage and connects the air passage and the exhaust groove.

[0019] This utility model also proposes a battery pack, including a housing and a battery as described above, wherein the battery is connected to the housing.

[0020] This utility model also proposes an electrical device, including a battery or a battery pack as described above.

[0021] This utility model provides a battery, battery pack, and electrical device, which, compared with the prior art, have the following advantages:

[0022] In the battery of this invention, the lower insulating component has a boss connected to the side of the insulating body facing the electrode assembly. The boss contacts the electrode assembly and serves to support and fix the electrode assembly. At least one boss is a venting boss, and the venting boss has a gas channel that extends along a second direction. Thus, the venting boss has little obstruction to gas flow, and the gas generated by thermal runaway of the battery can flow smoothly through the gas channel, which is conducive to the rapid discharge of gas out of the battery. Moreover, the cavity wall surface of the receiving cavity facing the boss is formed with a venting groove that communicates with the gas channel. The setting of the venting groove can increase the venting space inside the battery, make the gas flow smoother, enable the battery to vent quickly, and have a good pressure relief effect. Attached Figure Description

[0023] Figure 1 This is a perspective view of the battery according to an embodiment of the present invention;

[0024] Figure 2 This is an exploded schematic diagram of the battery according to an embodiment of the present invention;

[0025] Figure 3 This is a structural diagram of the fit between the cover and the lower insulating component in an embodiment of this utility model;

[0026] Figure 4 This is a front view of the insulating component in an embodiment of this utility model;

[0027] Figure 5 This is a perspective view of the insulating component in an embodiment of this utility model;

[0028] Figure 6 This is a perspective view of the insulating component in other embodiments of this utility model;

[0029] Figure 7 This is a perspective view of the insulating component in other embodiments of this utility model;

[0030] Figure 8 This is a perspective view of the insulating component in other embodiments of this utility model;

[0031] Figure 9 This is a perspective view of the insulating film according to an embodiment of the present invention;

[0032] Figure 10 This is a perspective view of the housing of an embodiment of the present utility model;

[0033] Figure 11 This is an embodiment of the present utility model. Figure 10 Enlarged diagram of A in the middle;

[0034] Figure 12 This is an exploded view of the shell and cover of an embodiment of this utility model.

[0035] In the diagram, Z represents the first direction; X represents the second direction; Y represents the third direction; 100 represents the receiving cavity; 101 represents the exhaust groove; 200 represents the air passage; 1 represents the shell; 2 represents the cover; 3 represents the lower insulating component; 31 represents the insulating body; 3101 represents the first surface; 3102 represents the first groove; 32 represents the boss; 3201 represents the second surface; 3202 represents the second groove; 33 represents the support body; 4 represents the electrode assembly; 5 represents the raised strip; 6 represents the insulating film; 601 represents the opening; 602 represents the clearance opening; 7 represents the exhaust bracket; and 8 represents the explosion-proof valve. Detailed Implementation

[0036] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0037] In the description of this application, 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," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the embodiments of the application, "parallel" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is -1° to 1°. "Perpendicular" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is 89° to 91°. Equal distances, equal angles, or equal areas refer to a state in which the tolerance range is -1% to 1%.

[0041] This application proposes a battery pack comprising a housing and a battery for storing and outputting electrical energy.

[0042] This application also proposes an electrical device that includes a battery pack as described above, wherein the battery pack is used to store and output electrical energy to provide power to the electrical device, which includes, but is not limited to, electric vehicles, drones, and power banks; alternatively, the electrical device may also include only the batteries described below, directly storing and outputting electrical energy through the batteries. Since the electrical device uses the batteries described below, it also possesses the advantages of the batteries described below, which will not be elaborated further in this application.

[0043] like Figures 1 to 3 As shown, a preferred embodiment of the present invention provides a battery having a first direction Z, a second direction X, and a third direction Y perpendicular to each other. The battery includes a housing 1, a cover 2, a lower insulating member 3, and an electrode assembly 4. The housing 1 and the cover 2 are connected along the first direction Z to form a receiving cavity 100. The lower insulating member 3 and the electrode assembly 4 are connected within the receiving cavity 100, and the lower insulating member 3 is disposed between the electrode assembly 4 and the cover 2. The lower insulating member 3 includes an insulating body 31 and a boss 32. In the first direction Z, one side of the insulating body 31 is connected to the cover 2, and the other side is connected to the boss 32. The boss 32 is in contact with the electrode assembly 4. The boss 32 has an air passage 200 that extends through the second direction X. Along the second direction X, an exhaust groove 101 is formed on the side of the housing 10 facing the boss 32, and the exhaust groove 101 communicates with the air passage 200.

[0044] Specifically, in the lower insulating member 3, the insulating body 31 has a boss 32 connected to the side facing the electrode assembly 4. The boss 32 contacts the electrode assembly 4 and serves to support and fix the electrode assembly 4. An air passage 200 is provided on the boss 32, which runs through the second direction X. As a result, the boss 32 has little obstruction to the gas flow, and the gas generated by the thermal runaway of the battery can flow smoothly through the air passage 200, which is conducive to the rapid discharge of gas out of the battery. Moreover, the side of the housing 1 facing the boss 32 has an exhaust groove 101 that communicates with the air passage 200. The exhaust groove 101 can increase the exhaust space in the battery and guide the gas in the receiving cavity 100 to flow to the air passage, thereby making the gas flow smoother, the battery can quickly exhaust gas, and the pressure relief effect is good.

[0045] In this embodiment, the insulating body 31 has protrusions 32 at both ends in the second direction X, which facilitates the rapid discharge of gas to the outside of the battery.

[0046] It should be noted that the battery also includes an explosion-proof valve 8, which is disposed on the cover 2 or on the side wall of the housing 1 opposite to the cover 2 along the first direction Z. In practical applications, when the battery experiences thermal runaway, the gas generated inside the battery is discharged to the outside of the battery through the explosion-proof valve 8. In this embodiment, as shown... Figure 12 As shown, the explosion-proof valve 8 is installed on the side wall of the housing 1 opposite to the cover 2 along the first direction Z. At this time, as... Figure 2 As shown, the battery also includes an exhaust bracket 7. Along the first direction Z, the exhaust bracket 7 is disposed on the side of the electrode assembly 4 away from the cover 2, and the exhaust bracket 7 is located in the receiving cavity 100. The exhaust bracket 7 connects the housing 1 and the electrode assembly 4. An exhaust cavity is formed between the exhaust bracket 7 and the housing 1. The exhaust cavity is connected to the exhaust groove 101. Based on the arrangement of the exhaust bracket 7, the side of the electrode assembly 4 facing away from the cover 2 along the first direction Z will not be in contact with the cavity wall of the receiving cavity 100. The electrode assembly 4 will not block the gas from breaking through the explosion-proof valve 8, and the battery pressure relief effect is good.

[0047] In this embodiment, as Figures 3 to 5As shown, in the first direction Z, the side of the insulating body 31 facing the cover 2 is the first surface 3101. The insulating body 31 has a first groove 3102, which is provided on the first surface 3101. Along the first direction Z, at least one first groove 3102 penetrates the boss 32 in the second direction X, so that the first groove 3102 forms an air passage 200 penetrating the boss 32 in the second direction X. Specifically, the first surface 3101 is recessed in the first direction Z towards the part where the boss 32 is located to form the first groove 3102. That is, the groove depth dimension of the first groove 3102 in the first direction Z is greater than the thickness dimension of the insulating body 31 in the first direction Z, and the dimension of the first groove 3102 in the second direction X is greater than the dimension of the boss 32 in the second direction X. The advantage of this structure forming the air passage 200 is that the structure is simple, the processing is convenient, and the contact area between the boss 32 and the electrode assembly 4 is not reduced. Therefore, the boss 32 has a strong supporting and fixing effect on the electrode assembly 4, and the battery structure is reliable.

[0048] It should be noted that, as Figure 6 As shown, there can be multiple first grooves 3102. In this case, there is a solid structure between two adjacent first grooves 3102, and the lower insulating member 3 has high strength. This application does not limit the number of first grooves 3102, but it is set according to the actual application.

[0049] In other embodiments, such as Figure 7 As shown, in the first direction Z, the side of the boss 32 facing the electrode assembly 4 is the second surface 3201. The boss 32 has a second groove 3202, which is disposed on the second surface 3201. The second groove 3202 penetrates the boss 32 along the second direction X to form an air passage 200. The advantage of forming the air passage 200 through this structure is that the structure is simple, the processing is convenient, and the contact area between the insulating body 31 and the cover 2 is not reduced. Therefore, the connection strength between the insulating body 31 and the cover 2 is high, and the battery structure is reliable.

[0050] In other embodiments, such as Figure 8 As shown, in the first direction Z, the side of the insulating body 31 facing the cover 2 is the first surface 3101, and the side of the boss 32 facing the electrode assembly 4 is the second surface 3201. The air passage 200 is located between the first surface 3101 and the second surface 3201. The advantage of this structure is that the contact area between the boss 32 and the electrode assembly 4 will not be reduced, nor will the contact area between the insulating body 31 and the cover 2. The boss 32 provides strong support and fixation for the electrode assembly 4, and the connection strength between the insulating body 31 and the cover 2 is high, making the battery structure more reliable.

[0051] Furthermore, such as Figure 8As shown, the lower insulating member 3 also includes a support body 33, which is disposed within the air passage 200. Along the first direction Z, both ends of the support body 33 are connected to the inner wall surface of the air passage 200. At this time, as... Figure 8 From the perspective shown, the support 33 supports the upper and lower inner walls of the air passage 200, thereby preventing the insulating body 31 from being recessed into the air passage 200 along the first direction Z and preventing the boss 32 from being recessed into the air passage 200 along the first direction Z. The lower insulating part 3 has high structural strength and the battery structure is reliable. It should be noted that the support 33 only partially blocks the air passage 200 to ensure that the air passage 200 can exhaust normally.

[0052] In this embodiment, as Figures 10 to 11 As shown, the exhaust groove 101 extends along the first direction Z. At this time, whether the explosion-proof valve is set on the cover 2 or the bottom wall of the shell 1, the exhaust groove 101 can guide the gas to flow smoothly along the first direction Z, and the battery pressure relief effect is good.

[0053] like Figure 11 As shown, the battery also includes protrusions 5. Along the second direction X, multiple protrusions 5 are connected to the cavity wall of the receiving cavity 100 facing the boss 32. The length of the protrusions 5 extends along the first direction Z. Multiple protrusions 5 are spaced apart along the third direction Y. Along the third direction Y, an exhaust groove 101 is formed between two adjacent protrusions 5. Specifically, the arrangement of the protrusions 5 can enhance the structural strength of the housing 1. The advantage of forming the exhaust groove 101 through this structure is that it can make the housing 1 have high structural strength and can also guide the smooth flow of gas.

[0054] In this embodiment, as Figure 2 and Figure 9 As shown, the battery also includes an insulating film 6, which is disposed within the receiving cavity 100. The insulating film 6 covers the electrode assembly 4, and along the first direction Z, an opening 601 is formed at one end of the insulating film 6 near the cover 2. The lower insulating member 3 is connected to the insulating film 6, and the protrusion 32 passes through the opening 601 and is inserted into the insulating film 6. Thus, the insulating film 6 can effectively isolate the electrode assembly 4 from the housing 1 and other components to achieve electrical insulation and ensure the normal operation of the battery. In the second direction X, the insulating film 6 has a relief opening 602 facing the air passage 200. The relief opening 602 connects the air passage 200 and the exhaust groove 101. The setting of the relief opening 602 can prevent the insulating film 6 from obstructing the gas flow and ensure the pressure relief effect of the battery.

[0055] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery having intersecting first direction (Z) and second direction (X), characterized in that, It includes a housing (1), a cover (2), a lower insulating component (3), and an electrode assembly (4); The shell (1) and the cover (2) are connected along the first direction (Z) to form a receiving cavity (100). The lower insulating member (3) and the electrode assembly (4) are disposed in the receiving cavity (100), and the lower insulating member (3) is disposed between the electrode assembly (4) and the cover (2); The lower insulating member (3) includes an insulating body (31) and a boss (32). In the first direction (Z), one side of the insulating body (31) is connected to the cover (2), and the other side is connected to the boss (32). The boss (32) is in contact with the electrode assembly (4). The boss (32) has an air passage (200) extending along the second direction (X), and the housing (1) has an exhaust groove (101) formed on the side facing the boss (32), and the exhaust groove (101) is connected to the air passage (200).

2. The battery according to claim 1, characterized in that, In the first direction (Z), the side of the insulating body (31) facing the cover (2) is a first surface (3101), the insulating body (31) has a first groove (3102), the first groove (3102) is provided on the first surface (3101), and the first groove (3102) penetrates the boss (32) along the second direction (X) to form the air passage (200).

3. The battery according to claim 1, characterized in that, In the first direction (Z), the side of the boss (32) facing the electrode assembly (4) is a second surface (3201), the boss (32) has a second groove (3202), the second groove (3202) is provided on the second surface (3201), and the second groove (3202) penetrates the boss (32) along the second direction (X) to form the air passage (200).

4. The battery according to claim 1, characterized in that, In the first direction (Z), the side of the insulating body (31) facing the cover (2) is the first surface (3101), the side of the boss (32) facing the electrode assembly (4) is the second surface (3201), and the air passage (200) is located between the first surface (3101) and the second surface (3201).

5. The battery according to claim 4, characterized in that, The lower insulating member (3) also includes a support (33), which is disposed in the air passage (200) along the first direction (Z), and both ends of the support (33) are connected to the inner wall surface of the air passage (200).

6. The battery according to any one of claims 1-5, characterized in that, The exhaust groove (101) extends along the first direction (Z).

7. The battery according to claim 6, characterized in that, The battery also has a third direction (Y), and the first direction (Z), the second direction (X) and the third direction (Y) intersect each other; The battery also includes protrusions (5). Along the second direction (X), the cavity wall of the receiving cavity (100) facing the boss (32) is connected with a plurality of protrusions (5). The length direction of the protrusions (5) extends along the first direction (Z). The plurality of protrusions (5) are spaced apart along the third direction (Y). Along the third direction (Y), the exhaust groove (101) is formed between two adjacent protrusions (5).

8. The battery according to claim 1, characterized in that, The battery also includes an insulating film (6), which is disposed in the receiving cavity (100). The insulating film (6) covers the electrode assembly (4) and has an opening (601) at one end of the insulating film (6) near the cover (2) along the first direction (Z). The lower insulating member (3) is connected to the insulating film (6), and the boss (32) passes through the opening (601) and is inserted into the insulating film (6); In the second direction (X), the insulating film (6) has a clearance opening (602) facing the air passage (200), the clearance opening (602) connecting the air passage (200) and the exhaust groove (101).

9. A battery pack, characterized in that, It includes a housing and a battery as described in any one of claims 1-8, the battery being connected to the housing.

10. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1-8 or the battery pack as described in claim 9.

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