A single cell and a battery pack

Abstract

The application provides a single battery and a battery pack, and belongs to the technical field of batteries. The single battery has a first direction and a second direction perpendicular to each other. The single battery comprises a shell, an electrode assembly, an exhaust member and a support table. The shell is provided with a bottom wall on one side along the first direction, and the bottom wall is provided with an explosion-proof valve. The electrode assembly is arranged in the shell. The exhaust member is arranged between the bottom wall and the electrode assembly, and is provided with an exhaust hole penetrating along the first direction. The support table is arranged on the exhaust member at intervals along the second direction. The support table, the exhaust member and the bottom wall define an exhaust passage, and the exhaust hole is communicated with the exhaust passage. The exhaust member has a shielding part between the adjacent support tables along the second direction. The projection of the shielding part on the bottom wall along the first direction overlaps the explosion-proof valve. The single battery provided by the application limits the pole piece in the electrode assembly by arranging the shielding part overlapping the explosion-proof valve on the exhaust member, prevents the pole piece from being sprayed to block the explosion-proof valve, and ensures the smoothness of exhaust.

Description

Technical Field

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

[0002] The conventional design of battery cells has the explosion-proof valve and top cover on the same side to ensure venting; however, with the continuous advancement of technology, the thermoelectric separation design has emerged. By separating the explosion-proof valve and the terminal post, the secondary hazards caused by the mixing of heat and electricity when the battery cell experiences thermal runaway are avoided.

[0003] Existing thermoelectric separation solutions suffer from valve opening problems. Utility Model Content

[0004] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a single cell battery and a battery pack.

[0005] This application provides the following technical solution: a single-cell battery having a first direction and a second direction perpendicular to each other, including:

[0006] The housing includes a bottom wall located at one end in the first direction, and the bottom wall is provided with an explosion-proof valve;

[0007] Electrode assemblies are disposed within the housing;

[0008] An exhaust component is disposed inside the housing and located on the bottom wall near the electrode assembly. The exhaust component has an exhaust hole extending through the first direction.

[0009] A support platform is located on the side of the exhaust component facing the bottom wall, and defines an exhaust channel with the exhaust component and the bottom wall, wherein the exhaust hole communicates with the exhaust channel; the support platform includes a first support platform and a second support platform spaced apart along the second direction;

[0010] The exhaust component has a shielding portion located between the first support platform and the second support platform adjacent to each other along the second direction, and the shielding portion at least partially overlaps with the explosion-proof valve on the bottom wall along the first direction.

[0011] In some embodiments, the vent includes a first vent and a second vent;

[0012] The first exhaust port and the second exhaust port are spaced apart along the second direction and are located on both sides of the shielding portion along the second direction. The first exhaust port and the second exhaust port are respectively connected to the exhaust channel.

[0013] In some embodiments, the housing has a third direction that is perpendicular to both the first direction and the second direction;

[0014] The number of the first support platforms is multiple, and the multiple first support platforms are located on two opposite sides of the first exhaust hole along the third direction;

[0015] The number of the second support platforms is multiple, and the multiple second support platforms are located on two opposite sides of the second exhaust port along the third direction.

[0016] In some embodiments, the first support platform has a first weight-reducing groove on the side facing the bottom wall, and the first weight-reducing groove is recessed towards the electrode assembly; and / or, the second support platform has a second weight-reducing groove on the side facing the bottom wall, and the second weight-reducing groove is recessed towards the electrode assembly.

[0017] In some embodiments, the exhaust component is provided with a plurality of first through slots on the side facing the bottom wall, and the first through slots connect two adjacent first exhaust holes along the second direction;

[0018] The exhaust component has a plurality of second through grooves on the side facing the bottom wall, and the second through grooves connect two adjacent second exhaust holes along the second direction.

[0019] In some embodiments, the first vent and the second vent extend along the second direction, and the first vent and the second vent penetrate the venting member along the first direction.

[0020] In some embodiments, the first support platform and the second support platform are centrally symmetrical about the midpoint of the shielding portion.

[0021] In some embodiments, along the third direction, one side of the first support platform is adjacent to the edge of the exhaust member, and the other side of the first support platform is adjacent to the wall of the first exhaust hole.

[0022] One side of the second support platform is adjacent to the edge of the exhaust component, and the other side of the second support platform is adjacent to the wall of the second exhaust port.

[0023] In some embodiments, the single cell further includes an insulating layer disposed between the electrode assembly and the housing, the insulating layer being sleeved on the electrode assembly, and the venting element being located between the insulating layer and the bottom wall.

[0024] Secondly, this application provides a battery pack including the aforementioned single battery cell.

[0025] The embodiments of this application have the following advantages: by setting a support platform on the side of the exhaust component facing the explosion-proof valve, and by using the support platform to space the bottom wall and the exhaust component to form an exhaust channel, the gas generated by the electrode assembly can be discharged from the explosion-proof valve through the exhaust channel, thereby ensuring the smooth opening of the explosion-proof valve; by setting a shielding part on the exhaust component that overlaps with the explosion-proof valve, the shielding part limits the electrode in the electrode assembly, while preventing the electrode from being ejected and blocking the explosion-proof valve, thereby ensuring the smoothness of exhaust.

[0026] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. 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 An exploded view of a single-cell battery provided by some embodiments of the present invention is shown.

[0029] Figure 2 This diagram shows a structural schematic of a single-cell battery according to some embodiments of the present invention;

[0030] Figure 3 This diagram shows a structural schematic view of a first embodiment of an exhaust assembly in a single-cell battery provided by some embodiments of the present invention;

[0031] Figure 4 It shows Figure 3 Enlarged view of section A in the middle;

[0032] Figure 5 This invention provides a schematic structural diagram from another perspective of a first embodiment of an exhaust assembly in a single-cell battery, according to some embodiments of the present invention.

[0033] Figure 6 This illustration shows a schematic structural view of a second embodiment of an exhaust assembly in a single-cell battery, provided by some embodiments of the present invention.

[0034] Figure 7 This diagram shows a second embodiment of an exhaust assembly in a single-cell battery, provided by some embodiments of the present invention, from another perspective.

[0035] Figure 8The diagram shows a structural schematic from one perspective of a third embodiment of an exhaust assembly in a single-cell battery provided by some embodiments of the present invention.

[0036] Explanation of key component symbols:

[0037] 100-Housing; 110-Bottom wall; 120-Explosion-proof valve; 200-Electrode assembly; 300-Exhaust component; 310-Exhaust port; 400-Support platform; 500-Exhaust channel; 410-First support platform; 420-Second support platform; 411-First weight-reducing groove; 421-Second weight-reducing groove; 340-Shielding part; 320-First through groove; 330-Second through groove; 311-First exhaust port; 312-Second exhaust port; 600-Insulating layer; 700-End cap.

[0038] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of these 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.

[0040] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0041] 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.

[0042] 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.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, some embodiments of this application provide a single cell battery. The single cell battery has a first direction X and a second direction Y that are perpendicular to each other. It is mainly used to improve the smoothness of opening the explosion-proof valve 120 and prevent the electrode sheet from being ejected and blocking the explosion-proof valve 120, so as to ensure the smoothness of exhaust.

[0045] The single cell includes a casing 100, an electrode assembly 200, an exhaust component 300, and a support platform 400.

[0046] The housing 100 includes a bottom wall 110 located at one end in the first direction X. The bottom wall 110 is provided with an explosion-proof valve 120 to control the internal pressure of the individual battery cells, thereby preventing the individual battery cells from exploding. When excessive pressure is generated inside the individual battery cells, the explosion-proof valve 120 will open under the pressure, thereby releasing the high-pressure gas generated inside the individual battery cells into the external environment, thereby reducing the internal pressure of the individual battery cells and effectively preventing the risk of individual battery cell explosions.

[0047] The electrode assembly 200 is disposed within the housing 100 so that the housing 100 provides protection for the electrode assembly 200 and ensures the stability of the electrode assembly 200 within the housing 100.

[0048] An exhaust device 300 is disposed inside the housing 100 and positioned on the bottom wall 110 near the electrode assembly 200. The bottom wall 110 and the electrode assembly 200 limit the exhaust device 300 to ensure its stability within the housing 100. The exhaust device 300 has an exhaust hole 310 extending along the first direction X, allowing the heat generated by the electrode assembly 200 during operation to be discharged into the explosion-proof valve 120 through the exhaust hole 310. The exhaust hole 310 also guides the gas generated by the electrode assembly 200, ensuring not only exhaust efficiency and stability but also the safety of the individual battery cells.

[0049] The support platform 400 is located on the side of the exhaust component 300 facing the bottom wall 110, and the side of the support platform 400 facing the bottom wall 110, together with the exhaust component 300 and the bottom wall 110, defines an exhaust channel 500. The exhaust hole 310 communicates with the exhaust channel 500 to guide the gas generated by the electrode assembly 200 through the exhaust channel 500, and to guide the gas through the exhaust channel 500 to the exhaust hole 310, so that the gas is guided through the exhaust hole 310 to the explosion-proof valve 120, thereby shortening the time for the gas generated by the electrode assembly 200 to enter the explosion-proof valve 120, thereby improving the exhaust efficiency.

[0050] Understandably, when the air pressure at the vent 310 is greater than the preset pressure of the explosion-proof valve 120, the explosion-proof valve 120 opens under the action of air pressure, thereby releasing the gas in the housing 100 to reduce the internal pressure of the single cell and thus prevent the single cell from exploding.

[0051] The support platform 400 includes a first support platform 410 and a second support platform 420 spaced apart along the second direction Y. The first support platform 410 and the second support platform 420 separate the exhaust component 300 and the bottom wall 110 to form an exhaust channel 500 that communicates with the explosion-proof valve 120, so that the gas generated by the electrode assembly 200 can enter the explosion-proof valve 120 through the exhaust channel 500.

[0052] In this embodiment, the exhaust component 300 has a shielding portion 340, which is located between the first support platform 410 and the second support platform 420 adjacent along the second direction Y. The projection of the shielding portion 340 on the bottom wall 110 along the first direction X at least partially overlaps with the explosion-proof valve 120, so as to limit the electrode in the electrode assembly 200 by the shielding portion 340, and at the same time prevent the electrode from being ejected and blocking the explosion-proof valve 120, so as to ensure the smoothness of exhaust.

[0053] like Figure 1As shown, in some embodiments of this application, the single cell includes an end cap 700, which is connected to the housing 100 along a first direction X. The end cap 700 and the bottom wall 110 are disposed on two opposite sides of the housing 100 along the first direction X, so as to provide protection and limit the electrode assembly 200 through the end cap 700 and the housing.

[0054] like Figures 3 to 6 As shown, in some embodiments of this application, the exhaust port 310 includes a first exhaust port 311 and a second exhaust port 312.

[0055] The first vent 311 and the second vent 312 are spaced apart along the second direction Y and are located on both sides of the shielding portion 340 along the second direction Y. Increasing the number of vents 310 further improves the efficiency of venting the gas generated by the electrode assembly 200 to the explosion-proof valve 120.

[0056] In some embodiments, the first exhaust port 311 and the second exhaust port 312 are symmetrically arranged on the exhaust member 300 to ensure the uniformity of the gas flow from the first exhaust port 311 and the second exhaust port 312, thereby ensuring the uniformity of the gas pressure at the explosion-proof valve 120 and avoiding the explosion-proof valve 120 from being opened accidentally due to excessively high local gas pressure.

[0057] In addition, the number of first exhaust holes 311 and the number of second exhaust holes 312 can be one, two or more, depending on the actual situation.

[0058] It is understandable that by increasing the number of the first exhaust port 311 and the second exhaust port 312, and by having the first exhaust port 311 and the second exhaust port 312 respectively connected to the exhaust channel 500, the efficiency of the gas generated by the electrode assembly 200 being discharged into the exhaust channel 500 through the first exhaust port 311 and the second exhaust port 312 can be improved, thereby improving the efficiency of the gas generated by the electrode assembly 200 being discharged into the explosion-proof valve 120, and thus improving the depressurization efficiency of the single battery.

[0059] like Figures 3 to 6 As shown, in some embodiments of this application, the housing 100 has a third direction Z that is mutually perpendicular to both the first direction X and the second direction Y.

[0060] The number of first support platforms 410 is multiple, and the number of first support platforms 410 can be any number of two or more values, which can be specifically set according to the actual situation. In this embodiment, the multiple first support platforms 410 are located on two opposite sides of the first exhaust hole 311 along the third direction Z, so as to separate the exhaust component 300 and the bottom wall 110 by means of the first support platforms 410. A portion of the multiple first support platforms 410 is disposed on one side of the first exhaust hole 311 along the third direction Z, and another portion of the multiple first support platforms 410 is disposed on the other side of the first exhaust hole 311 along the third direction Z, and the number of first exhaust holes 311 disposed on the two opposite sides of the first exhaust hole 311 along the third direction Z is equal, so as to ensure the stability of the first support platform 410 supporting the exhaust component 300.

[0061] Furthermore, the number of the second support platforms 420 is multiple, and the number of the second support platforms 420 can be any number of two or more values, which can be specifically set according to the actual situation. In this embodiment, the multiple second support platforms 420 are located on two opposite sides of the second exhaust hole 312 along the third direction Z, so as to separate the exhaust component 300 and the bottom wall 110 by means of the second support platforms 420. A portion of the multiple second support platforms 420 is arranged on one side of the second exhaust hole 312 along the third direction Z, and another portion of the multiple second support platforms 420 is arranged on the other side of the second exhaust hole 312 along the third direction Z, and the number of the second exhaust holes 312 arranged on the two opposite sides of the second exhaust hole 312 along the third direction Z is equal, so as to ensure the stability of the second support platforms 420 in supporting the exhaust component 300.

[0062] like Figure 6 and Figure 7 As shown in some embodiments of this application, the first support platform 410 is provided with at least one first weight-reducing groove 411 on the side facing the bottom wall 110. The first weight-reducing groove 411 is recessed towards the electrode assembly 200 so that it abuts against the bottom wall 110 on the side facing the bottom wall 110, thereby forming a support between the bottom wall 110 and the exhaust component 300. By providing the first weight-reducing groove 411 on the first support platform 410, the weight of the first support platform 410 is reduced, thereby reducing the weight of the exhaust component 300 and reducing the production cost of the exhaust component 300.

[0063] In addition, the second support platform 420 is provided with at least one second weight-reducing groove 421 on the side facing the bottom wall 110, so that the side of the second weight-reducing groove 421 facing the bottom wall 110 abuts against the bottom wall 110. The second weight-reducing groove 421 is recessed in the direction close to the electrode assembly 200 to form a support between the bottom wall 110 and the exhaust component 300. By providing the second weight-reducing groove 421 on the second support platform 420, the weight of the second support platform 420 is reduced, thereby reducing the weight of the exhaust component 300 and reducing the production cost of the exhaust component 300.

[0064] It is understandable that the number of the first weight reduction groove 411 and the second weight reduction groove 421 can be any number of one, two or more, and can be set according to the actual situation.

[0065] like Figures 5 to 7 As shown, in some embodiments of this application, there are multiple first weight-reducing grooves 411 and multiple second weight-reducing grooves 421, and the arrangement of the multiple first weight-reducing grooves 411 and multiple second weight-reducing grooves 421 includes any one of matrix arrangement, spiral array, linear arrangement and ring array.

[0066] It should be noted that by increasing the number of the first weight-reducing groove 411 and the second weight-reducing groove 421, the stress concentration point can be distributed to multiple areas, that is, the stress can be redistributed more evenly, avoiding local overload and avoiding excessively high stress peaks at a single location, thereby optimizing the stiffness distribution of the first support platform 410 and the second support platform 420, thereby improving the strength of the support platform 400, reducing the production materials of the exhaust component 300, lowering costs, and improving the compressive strength of the exhaust component 300.

[0067] like Figures 3 to 5 As shown, in some embodiments of this application, the exhaust component 300 is provided with a plurality of first through grooves 320 on the side facing the bottom wall 110. The first through grooves 320 connect two adjacent first exhaust holes 311 along the second direction Y to form a first exhaust channel 500 on the side of the exhaust component 300 facing the bottom wall 110.

[0068] It should be noted that the axial direction of the first through groove 320 is parallel to the axial direction of the exhaust channel 500, so as to improve the guiding efficiency of the first through groove 320 to the gas generated by the electrode assembly 200, thereby improving the exhaust efficiency.

[0069] In addition, the exhaust component 300 is provided with a plurality of second through grooves 330 on the side facing the bottom wall 110. The second through grooves 330 connect two adjacent second exhaust holes 312 along the second direction Y to form an exhaust channel 500 on the side of the exhaust component 300 facing the bottom wall 110.

[0070] It should be noted that the axial direction of the second channel 330 is parallel to the axial direction of the exhaust channel 500, so as to improve the guiding efficiency of the second channel 330 for the gas generated by the electrode assembly 200, thereby improving the exhaust efficiency.

[0071] In this embodiment, the arrangement of the plurality of first through slots 320 and the arrangement of the plurality of second through slots 330 includes any one of linear arrangement, matrix arrangement, and circular array.

[0072] It is understandable that the number of the first through slot 320 and the second through slot 330 can be any number of two or more values, and can be set according to the actual situation.

[0073] like Figures 3 to 7 As shown, in some embodiments of this application, the first exhaust port 311 and the second exhaust port 312 extend along the second direction Y, and the first exhaust port 311 and the second exhaust port 312 penetrate the exhaust member 300 along the first direction X, so that the gas generated by the electrode assembly 200 can be guided to the explosion-proof valve 120 through the first exhaust port 311 and the second exhaust port 312.

[0074] It is understood that the gas generated by the electrode assembly 200 can be guided to the exhaust channel 500 through the first exhaust port 311 and the second exhaust port 312 respectively, and then guided to the explosion-proof valve 120 through the exhaust channel 500.

[0075] By increasing the length of the first exhaust port 311 and the second exhaust port 312 along the second direction Y, the gas flow rate of the first exhaust port 311 and the second exhaust port 312 is increased, thereby improving the exhaust efficiency.

[0076] like Figures 5 to 7 As shown, in some embodiments of this application, the first support platform 410 and the second support platform 420 are centrally symmetrical about the midpoint of the shielding portion 340, so as to ensure the uniformity of the force on the first support platform 410 and the second support platform 420 between the exhaust component 300 and the bottom wall 110, and to ensure the stability of the first support platform 410 and the second support platform 420 supporting the exhaust component 300 respectively.

[0077] like Figures 4 to 7 As shown, in some embodiments of this application, along the third direction Z, one side of the first support platform 410 is adjacent to the edge of the exhaust component 300, and the other side of the first support platform 410 is adjacent to the hole wall of the first exhaust hole 311. That is, by increasing the length of the first support platform 410 along the third direction Z, the compressive strength of the first support platform 410 is improved, so as to ensure the stability of the first support platform 410 in supporting the exhaust component 300.

[0078] In addition, one side of the second support platform 420 is adjacent to the edge of the exhaust component 300, and the other side of the second support platform 420 is adjacent to the hole wall of the second exhaust hole 312. By increasing the length of the second support platform 420 along the third direction Z, the compressive strength of the second support platform 420 is improved, so as to ensure the stability of the second support platform 420 in supporting the exhaust component 300.

[0079] like Figure 1 As shown, in some embodiments of this application, the single cell further includes an insulating layer 600, which is disposed between the electrode assembly 200 and the housing 100. The insulating layer 600 is sleeved on the electrode assembly 200 to form an insulating barrier between the housing 100 and the electrode assembly 200, thereby preventing the electrode assembly 200 from contacting the housing 100 and causing a short circuit.

[0080] The exhaust component 300 is located between the insulating layer 600 and the bottom wall 110, so that the gas generated by the electrode assembly 200 can enter the exhaust channel 500 through the insulating layer 600, the first exhaust hole 311 and the second exhaust hole 312, and guide the gas to the explosion-proof valve 120 through the exhaust channel 500.

[0081] like Figure 2 As shown, some embodiments of this application provide a battery pack including the aforementioned single battery cell.

[0082] It is understood that the battery pack has the beneficial effects of the individual cells in any of the above embodiments, which will not be elaborated here.

[0083] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0084] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0085] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A single-cell battery having a first direction (X) and a second direction (Y) that are perpendicular to each other, characterized in that, include: The housing (100) includes a bottom wall (110) located at one end in the first direction (X), and the bottom wall (110) is provided with an explosion-proof valve (120). An electrode assembly (200) is disposed within the housing (100); An exhaust component (300) is disposed inside the housing (100) on the bottom wall (110) near the electrode assembly (200), and the exhaust component (300) is provided with an exhaust hole (310) extending along the first direction (X). A support platform (400) is located on the side of the exhaust member (300) facing the bottom wall (110) and defines an exhaust channel (500) with the exhaust member (300) and the bottom wall (110), and the exhaust hole (310) communicates with the exhaust channel (500); the support platform (400) includes a first support platform (410) and a second support platform (420) spaced apart along the second direction (Y); The exhaust component (300) has a shielding portion (340) located between the first support platform (410) and the second support platform (420) adjacent along the second direction (Y), and the projection of the shielding portion (340) along the first direction (X) onto the bottom wall (110) at least partially overlaps with the explosion-proof valve (120).

2. The single-cell battery according to claim 1, characterized in that, The exhaust port (310) includes a first exhaust port (311) and a second exhaust port (312); The first exhaust port (311) and the second exhaust port (312) are spaced apart along the second direction (Y) and are located on both sides of the shielding part (340) along the second direction (Y). The first exhaust port (311) and the second exhaust port (312) are respectively connected to the exhaust channel (500).

3. The single-cell battery according to claim 2, characterized in that, The housing (100) has a third direction (Z) that is perpendicular to both the first direction (X) and the second direction (Y). The number of the first support platform (410) is multiple, and the multiple first support platforms (410) are located on two opposite sides of the first exhaust hole (311) along the third direction (Z); The number of the second support platform (420) is multiple, and the multiple second support platforms (420) are located on two opposite sides of the second exhaust port (312) along the third direction (Z).

4. The single-cell battery according to claim 3, characterized in that, The first support platform (410) has a first weight-reducing groove (411) on the side facing the bottom wall (110), and the first weight-reducing groove (411) is recessed in the direction close to the electrode assembly (200); and / or, the second support platform (420) has a second weight-reducing groove (421) on the side facing the bottom wall (110), and the second weight-reducing groove (421) is recessed in the direction close to the electrode assembly (200).

5. The single-cell battery according to any one of claims 2 to 4, characterized in that, The exhaust component (300) has a plurality of first through slots (320) on the side facing the bottom wall (110), and the first through slots (320) connect two adjacent first exhaust holes (311) along the second direction (Y). The exhaust component (300) has a plurality of second through slots (330) on the side facing the bottom wall (110), and the second through slots (330) connect two adjacent second exhaust holes (312) along the second direction (Y).

6. The single-cell battery according to any one of claims 2 to 4, characterized in that, The first exhaust port (311) and the second exhaust port (312) extend along the second direction (Y).

7. The single-cell battery according to claim 5, characterized in that, The first support platform (410) and the second support platform (420) are centrally symmetrical about the midpoint of the shielding part (340).

8. The single-cell battery according to claim 3 or 4, characterized in that, Along the third direction (Z), one side of the first support platform (410) is adjacent to the edge of the exhaust component (300), and the other side of the first support platform (410) is adjacent to the hole wall of the first exhaust hole (311). One side of the second support platform (420) is adjacent to the edge of the exhaust component (300), and the other side of the second support platform (420) is adjacent to the wall of the second exhaust hole (312).

9. The single-cell battery according to claim 1, characterized in that, The single cell also includes an insulating layer (600), which is disposed between the electrode assembly (200) and the housing (100). The insulating layer (600) is sleeved on the electrode assembly (200), and the exhaust component (300) is located between the insulating layer (600) and the bottom wall (110).

10. A battery pack, characterized in that, The single-cell battery includes any one of claims 1 to 9.

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