Single battery, battery pack and power utilization device

Abstract

The utility model discloses a single battery, a battery pack and an electric device, and relates to the technical field of batteries. The single battery comprises a shell, a cover body, an electrode assembly and a supporting piece, the shell is provided with a containing cavity with an opening, and an anti-explosion valve is arranged at the end, away from the opening, of the shell in the third direction. The cover body covers the opening; the electrode assembly is arranged in the accommodating cavity; the supporting piece is arranged between the electrode assembly and the anti-explosion valve, the supporting piece is provided with an exhaust hole and an exhaust groove, the exhaust hole penetrates through the supporting piece in the third direction, the exhaust groove is formed in at least one end face of the supporting piece in the third direction, and the exhaust groove communicates with the exhaust hole; the supporting piece comprises a one-way flow guide part, the one-way flow guide part is arranged on the hole wall of the exhaust hole in a protruding mode in the second direction and connected with the hole wall, the exhaust hole extends in the first direction and is provided with a middle position in the first direction, and the one-way flow guide part extends in the direction facing the middle position. According to the single battery provided by the invention, the exhaust efficiency is effectively improved, and the probability of explosion of the single battery is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a single cell, a battery pack, and an electrical device. Background Technology

[0002] With the continuous development of the new energy vehicle industry, the requirements for battery energy density and safety in new energy vehicles are becoming increasingly stringent. To improve the safety of new energy vehicles, batteries currently typically employ a thermoelectric separation scheme with the terminals facing upwards and the explosion-proof valve facing downwards.

[0003] Batteries often use support components to separate the battery bottom wall from the internal electrode assembly. When the battery adopts a thermoelectric separation scheme with the electrode posts facing upwards and the explosion-proof valve facing downwards, the electrode assembly presses down on the support component due to its own weight, causing the support component to press tightly against the battery bottom wall. This can easily lead to the explosion-proof valve being blocked by the support component, thereby reducing the venting efficiency. As a result, after the battery thermal runaway, the venting rate is less than the gas production rate, causing the internal pressure of the battery to rise continuously, eventually leading to the battery explosion and affecting the safety performance of new energy vehicles. Utility Model Content

[0004] In order to achieve the above objectives, this application aims to provide a single-cell battery that solves the technical problem in the prior art where the explosion-proof valve is easily blocked by the support member, resulting in reduced exhaust efficiency and thus making the battery prone to explosion.

[0005] The technical solution adopted is as follows:

[0006] In a first aspect, embodiments of this application provide a single-cell battery, the single-cell battery having a first direction, a second direction, and a third direction intersecting each other in pairs, the single-cell battery comprising:

[0007] The housing has a receiving cavity with an opening, and an explosion-proof valve is provided at the end of the housing away from the opening in the third direction;

[0008] The cover is sealed to the opening;

[0009] The electrode assembly is disposed within the receiving cavity;

[0010] A support member is disposed between the electrode assembly and the explosion-proof valve. The support member has an exhaust hole and an exhaust groove. The exhaust hole penetrates the support member along the third direction. The exhaust groove is disposed on at least one end face of the support member along the third direction and communicates with the exhaust hole.

[0011] The support member includes a unidirectional flow guide portion, which protrudes along the second direction and is disposed on the wall of the exhaust hole. The unidirectional flow guide portion is connected to the wall of the exhaust hole. The exhaust hole extends along the first direction and has a middle position along the first direction. The unidirectional flow guide portion extends in a direction toward the middle position.

[0012] In one embodiment of the first aspect, the exhaust groove includes a first exhaust groove and a second exhaust groove arranged at intervals, the first exhaust groove extending along the first direction and communicating with the exhaust hole, and the second exhaust groove extending along the second direction and communicating with the exhaust hole;

[0013] The first exhaust groove and the second exhaust groove are disposed on the same end face of the support member, or the first exhaust groove and the second exhaust groove are respectively disposed on two opposite end faces of the support member along the third direction.

[0014] In one embodiment of the first aspect, both the first vent groove and the second vent groove are disposed on the end face of the support member away from the electrode assembly along the third direction.

[0015] In one embodiment of the first aspect, there are multiple first exhaust grooves, each disposed on opposite sides of the exhaust hole along the first direction; and / or there are multiple second exhaust grooves, each disposed on opposite sides of the exhaust hole along the second direction.

[0016] In one embodiment of the first aspect, the unidirectional flow guide includes a first protrusion and a second protrusion, both of which protrude along the second direction and are disposed on the wall of the exhaust hole, and are connected to the wall of the exhaust hole. The first protrusion and the second protrusion are respectively located on two opposite sides of the wall of the exhaust hole along the second direction, and the first protrusion and the second protrusion are offset along the first direction.

[0017] In one embodiment of the first aspect, the first protrusion has a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface are disposed adjacent to each other, and the first inclined surface is located on the side of the first protrusion facing the intermediate position, and the second inclined surface is located on the side of the first protrusion away from the intermediate position.

[0018] And / or, the second protrusion has a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface are disposed adjacent to each other, and the first inclined surface is located on the side of the second protrusion facing the middle position, and the second inclined surface is located on the side of the second protrusion away from the middle position;

[0019] The angle between the first inclined surface and the first direction is the first angle, and the angle between the second inclined surface and the first direction is the second angle, wherein the first angle is greater than the second angle.

[0020] In one embodiment of the first aspect, the lengths of both the first protrusion and the second protrusion in the second direction are less than half the width of the vent hole in the second direction.

[0021] In one embodiment of the first aspect, the single cell further includes an insulating member that covers the electrode assembly and is at least partially disposed between the electrode assembly and the support member. The support member has positioning holes at both ends along the first direction for positioning the insulating member.

[0022] Secondly, embodiments of this application also provide a battery pack, including the single battery cells described in any of the above embodiments.

[0023] Thirdly, embodiments of this application also provide an electrical device, including the battery pack described in the above embodiments.

[0024] The beneficial effects of this application are as follows: This application proposes a single-cell battery, which places a support member between the electrode assembly and the explosion-proof valve, and opens an exhaust hole through the support member along a third direction. In this way, when the electrode assembly experiences thermal runaway, the high-temperature gas generated at the end of the electrode assembly away from the cover can be quickly discharged through the exhaust hole and the explosion-proof valve. In addition, opening the exhaust hole can also reduce the contact area between the support member and the explosion-proof valve, reduce the probability of the explosion-proof valve being blocked due to the support member pressing against it, effectively improve the exhaust efficiency, and thus reduce the probability of the single-cell battery exploding.

[0025] Meanwhile, by providing an exhaust groove on at least one end face of the support member along a third direction, and the exhaust groove connecting to the exhaust port, the high-temperature gas generated by the electrode assembly along both sides of the first and / or second directions and at the end of the electrode assembly near the cover can be quickly discharged to the exhaust port through the exhaust groove, and then quickly discharged through the explosion-proof valve via the exhaust port. Furthermore, the exhaust groove further reduces the contact area between the support member and the explosion-proof valve, further reducing the probability of the explosion-proof valve being blocked due to the support member pressing against it, further improving exhaust efficiency, and thus further reducing the probability of a single battery cell exploding.

[0026] Furthermore, by providing a unidirectional flow guide that protrudes along the second direction onto the wall of the vent hole, and by extending the vent hole along the first direction with a central position along the first direction, the unidirectional flow guide extends towards this central position. This allows high-temperature gas generated on both sides of the electrode assembly along the first direction and at the end of the electrode assembly near the cover to flow through the unidirectional flow guide to the central position of the vent hole. During assembly, the central position of the vent hole is aligned with the explosion-proof valve position. When the explosion-proof valve is opened, the high-temperature gas is guided towards the valve for discharge, improving gas discharge efficiency. On the other hand, the unidirectional flow guide prevents high-temperature gas from flowing back from the central position of the vent hole, i.e., prevents gas from flowing backwards towards both sides of the electrode assembly along the first direction and at the end of the electrode assembly near the cover. This avoids high-temperature gas backflow leading to reduced exhaust efficiency, further improving exhaust efficiency and further reducing the probability of a single battery cell explosion. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 Explosion diagrams of individual cells in some embodiments of this application are shown;

[0029] Figure 2 A perspective view of the support member is shown in some embodiments of this application;

[0030] Figure 3 A top view of the support member is shown in some embodiments of this application;

[0031] Figure 4 A bottom view of the support member is shown in some embodiments of this application.

[0032] Explanation of key component symbols:

[0033] 100-cell battery;

[0034] 110 - Housing; 111 - Opening; 112 - Explosion-proof valve; 113 - Receiving cavity;

[0035] 120 - Electrode assembly;

[0036] 130 - Cover;

[0037] 140 - Support member; 141 - Exhaust hole; 1411 - Hole wall; 1412 - Middle position; 142 - Exhaust groove; 1421 - First exhaust groove; 1422 - Second exhaust groove; 143 - Positioning hole; 144 - One-way flow guide; 1441 - First protrusion; 1442 - Second protrusion; 1443 - First inclined surface; 1444 - Second inclined surface;

[0038] X - First direction;

[0039] Y - Second direction;

[0040] Z - Third-party direction;

[0041] A - First included angle;

[0042] B - the second included angle. Detailed Implementation

[0043] The embodiments of this application are described in detail below. Examples of the embodiments are shown 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 this application, and should not be construed as limiting this application.

[0044] 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", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship 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.

[0045] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; 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.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] like Figure 1 As shown, an embodiment of this application provides a single-cell battery 100, mainly used in a battery pack, which is primarily used in electrical devices. The single-cell battery 100 has a first direction X, a second direction Y, and a third direction Z that intersect each other in pairs. The single-cell battery 100 includes: a housing 110, a cover 130, an electrode assembly 120, and a support member 140.

[0049] The housing 110 is provided with a receiving cavity 113 having an opening 111, and an explosion-proof valve 112 is provided at the end of the housing 110 away from the opening 111 along the third direction Z. The cover 130 is sealed to the opening 111, and the electrode assembly 120 is disposed in the receiving cavity 113.

[0050] The support member 140 is disposed between the electrode assembly 120 and the explosion-proof valve 112. The support member 140 has an exhaust hole 141 and an exhaust groove 142. The exhaust hole 141 penetrates the support member 140 along the third direction Z. The exhaust groove 142 is disposed on at least one end face of the support member 140 along the third direction Z and communicates with the exhaust hole 141.

[0051] The support member 140 includes a one-way flow guide 144, which protrudes along the second direction Y and is disposed on the hole wall 1411 of the exhaust hole 141. The one-way flow guide 144 is connected to the hole wall 1411. The exhaust hole 141 extends along the first direction X and has a middle position 1412 along the first direction X. The one-way flow guide 144 extends in the direction toward the middle position 1412.

[0052] The single-cell battery 100 provided in the embodiments of this application has a support member 140 disposed between the electrode assembly 120 and the explosion-proof valve 112, and an exhaust hole 141 extending through the support member 140 along the third direction Z. In this way, when the electrode assembly 120 experiences thermal runaway, the high-temperature gas generated at the end of the electrode assembly 120 away from the cover 130 can be quickly discharged through the exhaust hole 141 and the explosion-proof valve 112. In addition, the exhaust hole 141 can also reduce the contact area between the support member 140 and the explosion-proof valve 112, reducing the probability of the explosion-proof valve 112 being blocked due to the support member 140 pressing against it, effectively improving the exhaust efficiency, and thus reducing the probability of the single-cell battery 100 exploding.

[0053] Meanwhile, by providing an exhaust groove 142 on at least one end face of the support member 140 along the third direction Z, and the exhaust groove 142 connecting to the exhaust hole 141, the high-temperature gas generated by the electrode assembly 120 along both sides of the first direction X and / or the second direction Y and the end of the electrode assembly 120 near the cover 130 can be quickly discharged to the exhaust hole 141 through the exhaust groove 142, and then quickly discharged through the explosion-proof valve 112 through the exhaust hole 141. Furthermore, the exhaust groove 142 can further reduce the contact area between the support member 140 and the explosion-proof valve 112, further reducing the probability of the explosion-proof valve 112 being blocked due to the support member 140 pressing against it, further improving the exhaust efficiency, and thus further reducing the probability of the single battery 100 exploding.

[0054] In addition, by providing a one-way flow guide 144 connected to the hole wall 1411 protruding along the second direction Y on the hole wall 1411 of the exhaust hole 141, the exhaust hole 141 extends along the first direction X and has a middle position 1412 along the first direction X, and the one-way flow guide 144 extends in the direction toward the middle position 1412. In this way, the high-temperature gas generated on both sides of the electrode assembly 120 along the first direction X and at the end of the electrode assembly 120 near the cover 130 can flow through the one-way flow guide 144 to the middle position 1412 of the exhaust port 141. During assembly, the middle position 1412 of the exhaust port 141 is aligned with the position of the explosion-proof valve 112. When the explosion-proof valve 112 is opened, the high-temperature gas is guided to the explosion-proof valve 112 for discharge, thereby improving the gas discharge efficiency. On the other hand, the one-way flow guide 144 can prevent the high-temperature gas from flowing back from the middle position 1412 of the exhaust port 141, that is, prevent the gas from flowing back to both sides of the electrode assembly 120 along the first direction X and at the end of the electrode assembly 120 near the cover 130, thereby avoiding the high-temperature gas backflow that would reduce the exhaust efficiency, and further improving the exhaust efficiency, and further reducing the probability of the single cell 100 exploding.

[0055] like Figure 1 and Figure 2As shown, in one embodiment of this application, the exhaust groove 142 includes a first exhaust groove 1421 and a second exhaust groove 1422 spaced apart. The first exhaust groove 1421 extends along a first direction X and communicates with the exhaust hole 141, and the second exhaust groove 1422 extends along a second direction Y and communicates with the exhaust hole 141. The first exhaust groove 1421 and the second exhaust groove 1422 are disposed on the same end face of the support member 140, or the first exhaust groove 1421 and the second exhaust groove 1422 are respectively disposed on two opposite end faces of the support member 140 along a third direction Z.

[0056] In this embodiment, the first exhaust groove 1421 and the second exhaust groove 1422 are spaced apart, and the first exhaust groove 1421 and the second exhaust groove 1422 extend along the first direction X and the second direction Y respectively and connect to the exhaust hole 141. The first exhaust groove 1421 and the second exhaust groove 1422 are disposed on the same end face of the support member 140 or respectively disposed on two opposite end faces of the support member 140 along the third direction Z. In this way, the high-temperature gas generated on both sides of the electrode assembly 120 along the first direction X and the end of the electrode assembly 120 near the cover 130 can be quickly discharged to the exhaust hole 141 through the first exhaust groove 1421 and then quickly discharged through the explosion-proof valve 112 through the exhaust hole 141. And the high-temperature gas generated on both sides of the electrode assembly 120 along the second direction Y and the end of the electrode assembly 120 near the cover 130 can be quickly discharged to the exhaust hole 141 through the second exhaust groove 1422 and then quickly discharged through the explosion-proof valve 112, which effectively improves the exhaust efficiency and reduces the probability of the single battery 100 exploding.

[0057] like Figure 1 and Figure 2 As shown, in the above embodiments of this application, the first exhaust groove 1421 and the second exhaust groove 1422 are both disposed on the end face of the support member 140 away from the electrode assembly 120 along the third direction Z.

[0058] In this embodiment, by both the first exhaust groove 1421 and the second exhaust groove 1422 are disposed on the end face of the support member 140 away from the electrode assembly 120 along the third direction Z, it is more beneficial to divert the high-temperature gas generated on both sides of the electrode assembly 120 along the first direction X and / or the second direction Y and the end of the electrode assembly 120 near the cover 130 from the high-temperature gas generated at the end of the electrode assembly 120 away from the cover 130. This minimizes the mutual influence between the high-temperature gases, thereby effectively improving exhaust efficiency and reducing the probability of the single battery 100 exploding. On the other hand, it also minimizes the contact area between the support member 140 and the explosion-proof valve 112, which is more conducive to reducing the probability of the explosion-proof valve 112 being blocked due to the support member 140 pressing against it.

[0059] like Figure 1 and Figure 2 As shown, in the above embodiments of this application, there are multiple first exhaust grooves 1421, which are respectively disposed on both sides of the exhaust hole 141 opposite to each other along the first direction X; and / or there are multiple second exhaust grooves 1422, which are respectively disposed on both sides of the exhaust hole 141 opposite to each other along the second direction Y.

[0060] In this embodiment, by setting the number of first exhaust grooves 1421 to multiple, and distributing the multiple first exhaust grooves 1421 to the opposite sides of the exhaust hole 141 along the first direction X, the high-temperature gas generated by the opposite sides of the electrode assembly 120 along the first direction X and the end of the electrode assembly 120 near the cover 130 can flow through the first exhaust grooves 1421 on the opposite sides to the middle position 1412 of the exhaust hole 141, and be discharged through the explosion-proof valve 112, effectively improving the gas discharge efficiency.

[0061] By setting the number of second exhaust grooves 1422 to multiple, and setting the multiple second exhaust grooves 1422 on opposite sides of the exhaust hole 141 along the second direction Y, the high temperature gas generated on opposite sides of the electrode assembly 120 along the second direction Y and at the end of the electrode assembly 120 near the cover 130 can flow through the second exhaust grooves 1422 on opposite sides to the middle position 1412 of the exhaust hole 141, and be discharged through the explosion-proof valve 112, effectively improving the gas discharge efficiency.

[0062] like Figure 2 and Figure 3 As shown in the above embodiments of this application, the unidirectional flow guide 144 includes a first protrusion 1441 and a second protrusion 1442. The first protrusion 1441 and the second protrusion 1442 are both protruding along the second direction Y and disposed on the hole wall 1411 of the exhaust hole 141, and are both connected to the hole wall 1411 of the exhaust hole 141. The first protrusion 1441 and the second protrusion 1442 are respectively located on two opposite sides of the hole wall 1411 of the exhaust hole 141 along the second direction Y, and the first protrusion 1441 and the second protrusion 1442 are offset along the first direction X.

[0063] In this embodiment, the first protrusion 1441 and the second protrusion 1442 connected to the hole wall 1411 are respectively disposed on two opposite sides of the hole wall 1411 along the second direction Y, and the first protrusion 1441 and the second protrusion 1442 are staggered along the first direction X. In this way, the high-temperature gas generated by the electrode assembly 120 along both sides of the first direction X and the end of the electrode assembly 120 near the cover 130 can flow to the exhaust hole 141 along the extending direction of the first protrusion 1441 and / or the second protrusion 1442, and the side of the first protrusion 1441 and / or the second protrusion 1442 near the middle position 1412 can prevent the high-temperature gas from flowing from the middle position 1412 of the exhaust hole 141 to the first exhaust groove 1421, thereby avoiding the backflow of high-temperature gas and the resulting reduction in exhaust efficiency.

[0064] like Figure 3 and Figure 4 As shown, in the above embodiments of this application, the first protrusion 1441 has a first inclined surface 1443 and a second inclined surface 1444. The first inclined surface 1443 and the second inclined surface 1444 are arranged adjacent to each other, and the first inclined surface 1443 is located on the side of the first protrusion 1441 facing the middle position 1412, and the second inclined surface 1444 is located on the side of the first protrusion 1441 away from the middle position 1412; and / or, the second protrusion 1442 has a first inclined surface 1443 and a second inclined surface 1444. The first inclined surface 1443 and the second inclined surface 1444 are arranged adjacent to each other, and the first inclined surface 1443 is located on the side of the second protrusion 1442 facing the middle position 1412, and the second inclined surface 1444 is located on the side of the second protrusion 1442 away from the middle position 1412. The angle between the first inclined surface 1443 and the first direction X is the first angle A, and the angle between the second inclined surface 1444 and the first direction X is the second angle B. The first angle A is greater than the second angle B.

[0065] In this embodiment, the first inclined surface 1443 is located on the side of the first protrusion 1441 and / or the second protrusion 1442 facing the central position 1412, and the second inclined surface 1444 is located on the side of the first protrusion 1441 and / or the second protrusion 1442 away from the central position 1412. By setting the first angle A between the first inclined surface 1443 and the first direction X to be greater than the second angle B between the second inclined surface 1444 and the first direction X, on the one hand, the blocking area of ​​the first inclined surface 1443 against high-temperature gas in the second direction Y can be guaranteed, and on the other hand, the guiding effect of the second inclined surface 1444 on high-temperature gas can be guaranteed, thereby effectively improving the exhaust efficiency and reducing the probability of explosion of the single battery 100.

[0066] like Figure 3 and Figure 4As shown in the above embodiments of this application, the lengths of the first protrusion 1441 and the second protrusion 1442 in the second direction Y are both less than half the width of the exhaust hole 141 in the second direction Y.

[0067] In this embodiment, by setting the lengths of the first protrusion 1441 and the second protrusion 1442 in the second direction Y to be less than half the width of the exhaust hole 141 in the second direction Y, a certain gap is formed between the first protrusion 1441 and the second protrusion 1442 in the second direction Y. This allows the high-temperature gas generated by the electrode assembly 120 on both sides of the first direction X and at the end of the electrode assembly 120 near the cover 130 to flow through the gap to the middle position 1412 of the exhaust hole 141 along the extension direction of the first protrusion 1441 and / or the second protrusion 1442, thereby ensuring exhaust efficiency.

[0068] like Figure 1 and Figure 2 As shown, in one embodiment of this application, the single cell 100 further includes an insulating member (not shown), which covers the electrode assembly 120 and is at least partially disposed between the electrode assembly 120 and the support member 140. The support member 140 has positioning holes 143 at both ends along the first direction X, which are used to position the insulating member.

[0069] In this embodiment, the insulating component covers the electrode assembly 120 and is at least partially disposed between the electrode assembly 120 and the support member 140, so as to provide insulation protection for the electrode assembly 120 and avoid the technical problem of short circuit caused by contact between the electrode assembly 120 and the support member 140 or the housing 110.

[0070] Meanwhile, by opening positioning holes 143 at both ends of the support member 140 along the first direction X for positioning the insulating member, the support member 140 is stably and accurately positioned at the end of the insulating member away from the cover 130 under the action of the positioning holes 143.

[0071] It is understandable that the end of the insulating component near the explosion-proof valve 112 is provided with a positioning post that mates with the positioning hole 143. The positioning post can be a thermoplastic positioning post so that the support component 140 and the insulating component are fixed by thermoplastic connection.

[0072] Embodiments of this application also provide a battery pack, including the single battery cell 100 in any of the above embodiments.

[0073] The battery pack has the single cell 100 of any of the above embodiments, and therefore has all the beneficial effects of the single cell 100, which will not be described in detail here.

[0074] Embodiments of this application also provide an electrical device, including the battery pack described in the above embodiments.

[0075] The electrical device has the battery pack described in the above embodiments, and therefore has all the beneficial effects of the battery pack, which will not be elaborated here.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A single-cell battery, said single-cell battery (100) having a first direction (X), a second direction (Y), and a third direction (Z) intersecting each other in pairs, characterized in that, The single cell (100) includes: The housing (110) is provided with a receiving cavity (113) having an opening (111), and an explosion-proof valve (112) is provided at one end of the housing (110) away from the opening (111) along the third direction (Z). The cover (130) is sealed to the opening (111). An electrode assembly (120) is disposed within the receiving cavity (113); A support member (140) is disposed between the electrode assembly (120) and the explosion-proof valve (112). The support member (140) has an exhaust hole (141) and an exhaust groove (142). The exhaust hole (141) penetrates the support member (140) along the third direction (Z). The exhaust groove (142) is disposed on at least one end face of the support member (140) along the third direction (Z). The exhaust groove (142) communicates with the exhaust hole (141). The support member (140) includes a one-way flow guide (144), which protrudes along the second direction (Y) and is disposed on the hole wall (1411) of the exhaust hole (141). The one-way flow guide (144) is connected to the hole wall (1411). The exhaust hole (141) extends along the first direction (X) and has a middle position (1412) along the first direction (X). The one-way flow guide (144) extends in a direction toward the middle position (1412).

2. The single-cell battery according to claim 1, characterized in that, The exhaust groove (142) includes a first exhaust groove (1421) and a second exhaust groove (1422) arranged at intervals. The first exhaust groove (1421) extends along the first direction (X) and communicates with the exhaust hole (141). The second exhaust groove (1422) extends along the second direction (Y) and communicates with the exhaust hole (141). The first exhaust groove (1421) and the second exhaust groove (1422) are disposed on the same end face of the support member (140), or the first exhaust groove (1421) and the second exhaust groove (1422) are respectively disposed on two end faces of the support member (140) opposite to each other along the third direction (Z).

3. The single-cell battery according to claim 2, characterized in that, The first exhaust groove (1421) and the second exhaust groove (1422) are both disposed on the end face of the support member (140) away from the electrode assembly (120) along the third direction (Z).

4. The single-cell battery according to claim 3, characterized in that, There are multiple first exhaust grooves (1421), which are respectively located on opposite sides of the exhaust hole (141) along the first direction (X); and / or there are multiple second exhaust grooves (1422), which are respectively located on opposite sides of the exhaust hole (141) along the second direction (Y).

5. The single-cell battery according to claim 2, characterized in that, The unidirectional flow guide (144) includes a first protrusion (1441) and a second protrusion (1442). The first protrusion (1441) and the second protrusion (1442) are both protruding along the second direction (Y) and disposed on the hole wall (1411) of the exhaust hole (141), and are both connected to the hole wall (1411) of the exhaust hole (141). The first protrusion (1441) and the second protrusion (1442) are respectively located on two opposite sides of the hole wall (1411) of the exhaust hole (141) along the second direction (Y), and the first protrusion (1441) and the second protrusion (1442) are offset along the first direction (X).

6. The single-cell battery according to claim 5, characterized in that, The first protrusion (1441) has a first inclined surface (1443) and a second inclined surface (1444), the first inclined surface (1443) and the second inclined surface (1444) are arranged adjacent to each other, and the first inclined surface (1443) is located on the side of the first protrusion (1441) facing the middle position (1412), and the second inclined surface (1444) is located on the side of the first protrusion (1441) away from the middle position (1412); And / or, the second protrusion (1442) has a first inclined surface (1443) and a second inclined surface (1444), the first inclined surface (1443) being disposed adjacent to the second inclined surface (1444), and the first inclined surface (1443) being located on the side of the second protrusion (1442) facing the intermediate position (1412), and the second inclined surface (1444) being located on the side of the second protrusion (1442) away from the intermediate position (1412); The angle between the first inclined surface (1443) and the first direction (X) is the first angle (A), and the angle between the second inclined surface (1444) and the first direction (X) is the second angle (B). The first angle (A) is greater than the second angle (B).

7. The single-cell battery according to claim 5, characterized in that, The lengths of the first protrusion (1441) and the second protrusion (1442) in the second direction (Y) are both less than half the width of the exhaust hole (141) in the second direction (Y).

8. The single-cell battery according to any one of claims 1 to 7, characterized in that, The single cell (100) also includes an insulating member, which covers the electrode assembly (120) and is at least partially disposed between the electrode assembly (120) and the support member (140). The support member (140) has positioning holes (143) at both ends along the first direction (X) for positioning the insulating member.

9. A battery pack, characterized in that, Includes the single cell (100) according to any one of claims 1 to 8.

10. An electrical device, characterized in that, Includes the battery pack as described in claim 9.

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