Battery cell and battery pack

Abstract

This application provides a battery cell and a battery pack, relating to the field of battery technology. The battery cell includes: a housing, an end cap connected to one side of the housing, an explosion-proof valve connected to the side of the housing away from the end cap, a plurality of electrode assemblies spaced apart within the housing along a second direction, and at least one insulating guide plate disposed within the housing. The explosion-proof valve and the end cap are arranged opposite each other along a third direction. The insulating guide plate is located in the gap between two adjacent electrode assemblies. The insulating guide plate has a first guide channel penetrating along a third direction and a second guide channel penetrating along the first direction, the first guide channel and the second guide channel communicating with each other. Through the above structural design, the risk of some high-temperature, high-pressure gas accumulating at the end cap location is reduced, thereby improving the safety of the battery cell.

Description

Technical Field

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

[0002] Battery cells are a crucial component of the power battery pack in new energy vehicles. To mitigate the risks of thermal runaway in battery cells, explosion-proof valves are typically located on the side of the casing furthest from the end cap, allowing high-temperature, high-pressure gases to be dispersed to the bottom of the vehicle in the event of thermal runaway. However, some of the high-temperature, high-pressure gases generated during thermal runaway can accumulate towards the end cap, potentially causing it to burst open and compromising the safety of the battery cell. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a battery cell and a battery pack, which aims to solve the technical problem that high-temperature and high-pressure gases generated by thermal runaway tend to accumulate at the end cap position.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] In a first aspect, embodiments of this application provide a battery cell having a first direction, a second direction, and a third direction that are mutually perpendicular to each other, and comprising:

[0006] case;

[0007] End cap, attached to one side of the housing;

[0008] An explosion-proof valve is connected to the side of the housing away from the end cap, and the explosion-proof valve and the end cap are arranged opposite each other along the third direction;

[0009] Multiple electrode assemblies are disposed at intervals within the housing along the second direction, with a gap between adjacent electrode assemblies;

[0010] At least one insulating drain plate is located in the gap between two adjacent electrode assemblies. The insulating drain plate is provided with a first drain channel extending along the third direction and a second drain channel extending along the first direction, and the first drain channel and the second drain channel are in communication.

[0011] In some embodiments of the first aspect, the insulating drain plate is provided with a third drain channel extending along the second direction, and the first drain channel is indirectly connected to the gap through the third drain channel along the second direction.

[0012] In some embodiments of the first aspect, multiple first drainage channels, second drainage channels, and third drainage channels are provided. Multiple first drainage channels are spaced apart along the first direction, multiple second drainage channels are spaced apart along the third direction, and multiple third drainage channels are arranged in a rectangular array along the first direction and the second direction. The third drainage channels are connected to the second drainage channels.

[0013] In some embodiments of the first aspect, the insulating drainage plate includes a first plate, a second plate, a third plate, and a fourth plate. The first plate and the second plate are spaced apart along the second direction, and the third plate and the fourth plate are spaced apart along the first direction. The third plate and the fourth plate are respectively connected to the first plate and the second plate. The first plate, the second plate, the third plate, and the fourth plate enclose the first drainage channel. The second drainage channel penetrates the third plate and the fourth plate along the first direction, and the third drainage channel penetrates the first plate and the second plate along the second direction.

[0014] In some embodiments of the first aspect, multiple second drainage channels and multiple third drainage channels are provided, with the multiple second drainage channels spaced apart along the third direction, and the multiple third drainage channels arranged in a rectangular array along the first direction and the second direction.

[0015] In some embodiments of the first aspect, the insulating drain plate is provided with the first drain channel and the second drain channel on opposite sides along the second direction, and the first drain channel is directly connected to the gap along the second direction.

[0016] In some embodiments of the first aspect, the second drainage channel is directly connected to the gap along the second direction.

[0017] In some embodiments of the first aspect, the insulating drainage plate is provided with a clearance groove extending along the second direction on the side near the explosion-proof valve, the clearance groove and the explosion-proof valve are arranged opposite to each other along the third direction, and the first drainage channel communicates with the clearance groove.

[0018] In some embodiments of the first aspect, the dimension of the clearance groove along the first direction is H1, and the dimension of the clearance groove along the third direction is H2, satisfying: H1 > H2.

[0019] Secondly, embodiments of this application provide a battery pack including the battery cells described in any of the embodiments of the first aspect above.

[0020] The beneficial effects of this application are as follows:

[0021] The battery cell provided in this application has an insulating guide plate disposed in the gap between two adjacent electrode assemblies. The insulating guide plate has a first guide channel and a second guide channel. The first guide channel penetrates the insulating guide plate along a third direction, and the second guide channel penetrates the insulating guide plate along a first direction, and the first guide channel and the second guide channel are connected. In this way, when the battery cell experiences thermal runaway, the high-temperature and high-pressure gas on the opposite sides of the electrode assembly along the second direction, the high-temperature and high-pressure gas on the side of the electrode assembly near the end cap, and the high-temperature and high-pressure gas between two adjacent electrode assemblies can all be dispersed to the explosion-proof valve through the first guide channel, reducing the risk of some high-temperature and high-pressure gas accumulating at the end cap location, thereby improving the safety of the battery cell.

[0022] 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

[0023] 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.

[0024] Figure 1 A three-dimensional structural schematic diagram of a battery cell is shown in some embodiments of this application;

[0025] Figure 2 It shows Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0026] Figure 3 It shows Figure 1 Schematic diagram of the cross-sectional structure at point BB;

[0027] Figure 4 It shows Figure 1 A schematic diagram of the decomposed structure;

[0028] Figure 5 This illustration shows an assembly structure diagram of multiple electrode assemblies and at least one insulating drain plate in other embodiments of this application;

[0029] Figure 6 It shows Figure 5 A schematic diagram of the structure of the central insulating drain plate from one perspective;

[0030] Figure 7 It shows Figure 5 Another perspective structural schematic diagram of the insulated drain plate;

[0031] Figure 8 It shows Figure 5 Another structural schematic diagram of the insulated drain plate from another perspective;

[0032] Figure 9 This illustration shows a schematic diagram of the assembly structure of multiple electrode assemblies and at least one insulating drain plate in some embodiments of this application;

[0033] Figure 10 It shows Figure 9 A schematic diagram of the structure of the insulating drain plate from one perspective.

[0034] Explanation of key component symbols:

[0035] 100-Battery cell; 110-Housing; 120-End cap; 130-Explosion-proof valve; 140-Electrode assembly; 141-Gap; 142-Electrode body; 143-Positive tab; 144-Negative tab; 150-Insulating guide plate; 151-First guide channel; 152-Second guide channel; 153-Third guide channel; 154-First plate; 155-Second plate; 156-Third plate; 157-Fourth plate; 158-Allowing groove; 161-Positive terminal; 162-Negative terminal; X-First direction; Y-Second direction; Z-Third direction; Detailed Implementation

[0036] 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.

[0037] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this application.

[0038] Furthermore, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Moreover, "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 indicates 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 indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this application, the terms "first," "second," etc., are used to distinguish different objects and should not be construed as indicating or implying a specific order or hierarchy, or implicitly specifying the number of technical features indicated. Therefore, a feature marked "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 defined.

[0040] In the description of this application, the term "multiple A's and at least one B', with A and B alternating and B connected between two adjacent A's" can be understood as: multiple A's and at least one B's are arranged in the order ABAB...A, that is, starting with A and ending with A, and there is exactly one B between two adjacent A's; the term "multiple A's and multiple B's correspond one-to-one" can be understood as: the number of A's and the number of B's ​​are the same, and there is a one-to-one mapping relationship, that is, each A corresponds to one B, and each B also corresponds to one A.

[0041] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "attachment," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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] In the description of this application, the term "and / or" indicates that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0043] In the description of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 80° to 90°, the two directions can be considered perpendicular; if the angle between two directions is 0° to 10°, the two directions can be considered parallel.

[0044] Battery cells are a crucial component of the power battery pack in new energy vehicles. To mitigate the danger of thermal runaway in battery cells, explosion-proof valves are typically located on the side of the casing furthest from the end cap. This allows high-temperature, high-pressure gases to be dispersed to the bottom of the vehicle in the event of thermal runaway, thus reducing the impact on occupants. However, some of the high-temperature, high-pressure gases generated during thermal runaway can accumulate towards the end cap, potentially causing it to burst open and compromising the safety of the battery cell.

[0045] like Figure 1 As shown, to solve the above-mentioned technical problems, embodiments of this application provide a battery cell 100, which relates to the field of battery technology and is mainly used in battery packs, so as to be indirectly used in electrical devices or energy storage devices in the form of battery packs. Of course, the battery cell 100 can also be directly used in electrical devices or energy storage devices without taking the form of a battery pack, and no specific limitation is made to the application scenarios of the battery cell 100 here.

[0046] For example, electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, new energy vehicles, etc., and new energy vehicles can be pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles, etc.; spacecraft can be airplanes, rockets, space shuttles, drones, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools can be metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.; energy storage devices include energy storage containers, energy storage cabinets, energy storage power stations, wind power generation devices, solar power generation devices, mobile power devices, and temporary power supply devices, etc.; no specific limitations are made on the types of electrical devices and energy storage devices here.

[0047] Combination Figures 2 to 4 As shown, the battery cell 100 provided in this embodiment has a first direction X, a second direction Y and a third direction Z that are perpendicular to each other, and includes: a housing 110, an end cap 120, an explosion-proof valve 130, a plurality of electrode assemblies 140 and at least one insulating guide plate 150.

[0048] The end cap 120 is connected to one side of the housing 110; the explosion-proof valve 130 is connected to the side of the housing 110 away from the end cap 120, and the explosion-proof valve 130 and the end cap 120 are arranged opposite each other along the third direction Z; a plurality of electrode assemblies 140 are arranged at intervals along the second direction Y in the housing 110, and there is a gap 141 between two adjacent electrode assemblies 140; the insulating drainage plate 150 is located in the gap 141 between two adjacent electrode assemblies 140, and the insulating drainage plate 150 is provided with a first drainage channel 151 extending along the third direction Z and a second drainage channel 152 extending along the first direction X, and the first drainage channel 151 and the second drainage channel 152 are connected.

[0049] It should be noted that since there are multiple electrode assemblies 140 and at least one insulating drain plate 150, and the insulating drain plate 150 is located within the gap 141 between two adjacent electrode assemblies 140, it can be understood that the electrode assemblies 140 and the insulating drain plate 150 are alternately arranged along the second direction Y. For example, when there are two electrode assemblies 140, there is one insulating drain plate 150; when there are three electrode assemblies 140, there are two insulating drain plates 150; when there are four electrode assemblies 140, there are three insulating drain plates 150; and so on when there are five or more electrode assemblies 140, which will not be elaborated here.

[0050] It should be noted that since the insulating drain plate 150 is located in the gap 141 between two adjacent electrode assemblies 140, and the insulating drain plate 150 is provided with a first drain channel 151 that penetrates along the third direction Z (i.e., the first drain channel 151 penetrates the insulating drain plate 150 along the third direction Z), the first drain channel 151 and the gap 141 are interconnected.

[0051] It is understood that the battery cell 100 provided in this embodiment has an insulating guide plate 150 disposed in the gap 141 between two adjacent electrode assemblies 140. The insulating guide plate 150 is provided with a first guide channel 151 and a second guide channel 152. The first guide channel 151 penetrates the insulating guide plate 150 along the third direction Z, and the second guide channel 152 penetrates the insulating guide plate 150 along the first direction X. The first guide channel 151 is connected to the second guide channel 152 and the gap 141 respectively. In this way, when the battery cell 100 experiences thermal runaway, the high-temperature and high-pressure gas on the opposite sides of the electrode assembly 140 along the second direction Y, the high-temperature and high-pressure gas on the side of the electrode assembly 140 near the end cap 120, and the high-temperature and high-pressure gas between two adjacent electrode assemblies 140 can all be dispersed to the explosion-proof valve 130 through the first guide channel 151, reducing the risk of some high-temperature and high-pressure gas accumulating at the end cap 120, thereby improving the safety of the battery cell 100.

[0052] like Figures 1 to 4 As shown, in some embodiments, the insulating drain plate 150 is provided with a third drain channel 153 extending along the second direction Y, and the first drain channel 151 is indirectly connected to the gap 141 along the second direction Y through the third drain channel 153.

[0053] It is understandable that the first channel 151 and the gap 141 are indirectly connected through the third channel 153. In this way, when the battery cell 100 experiences thermal runaway, the high-temperature and high-pressure gas between two adjacent electrode assemblies 140 is first dispersed into the first channel 151 through the third channel 153, and then dispersed into the explosion-proof valve 130 through the first channel 151.

[0054] like Figures 1 to 4 As shown, in a specific embodiment, multiple first drainage channels 151, second drainage channels 152, and third drainage channels 153 are provided. The multiple first drainage channels 151 are spaced apart along a first direction X, the multiple second drainage channels 152 are spaced apart along a third direction Z, and the multiple third drainage channels 153 are arranged in a rectangular array along the first direction X and the second direction Y. The third drainage channels 153 are connected to the second drainage channels 152. This increases the drainage area of ​​the insulating drainage plate 150, thereby improving the exhaust efficiency of the battery cell 100.

[0055] like Figures 5 to 8 As shown, in another specific embodiment, the insulating drainage plate 150 includes a first plate 154, a second plate 155, a third plate 156, and a fourth plate 157. The first plate 154 and the second plate 155 are spaced apart along the second direction Y, and the third plate 156 and the fourth plate 157 are spaced apart along the first direction X. The third plate 156 and the fourth plate 157 are respectively connected to the first plate 154 and the second plate 155. The first plate 154, the second plate 155, the third plate 156, and the fourth plate 157 enclose to form a first drainage channel 151. The second drainage channel 152 penetrates the third plate 156 and the fourth plate 157 along the first direction X, and the third drainage channel 153 penetrates the first plate 154 and the second plate 155 along the second direction Y.

[0056] It is understandable that the first drainage channel 151 formed by the first plate 154, the second plate 155, the third plate 156 and the fourth plate 157 has a larger range, which is conducive to a large amount of exhaust, thereby also increasing the drainage area of ​​the insulating drainage plate 150.

[0057] like Figure 7 and Figure 8As shown, multiple second drainage channels 152 and multiple third drainage channels 153 are provided. Multiple second drainage channels 152 are spaced apart along the third direction Z, and multiple third drainage channels 153 are arranged in a rectangular array along the first direction X and the second direction Y. This further increases the drainage area of ​​the insulating drainage plate 150, thereby further improving the exhaust efficiency of the battery cell 100.

[0058] like Figure 9 and Figure 10 As shown, in some other embodiments, the insulating drain plate 150 is provided with a first drain channel 151 and a second drain channel 152 on both opposite sides along the second direction Y. The first drain channel 151 is directly connected to the gap 141 along the second direction Y.

[0059] It is understandable that since the first drainage channel 151 is directly connected to the gap 141 along the second direction Y, when the battery cell 100 experiences thermal runaway, the high-temperature and high-pressure gas between two adjacent electrode assemblies 140 is directly dispersed to the explosion-proof valve 130 through the first drainage channel 151, which is more conducive to large-scale exhaust and thus also increases the drainage area of ​​the insulating drainage plate 150.

[0060] like Figure 9 and Figure 10 As shown, the second drainage channel 152 is directly connected to the gap 141 along the second direction Y, which further increases the drainage area of ​​the insulating drainage plate 150.

[0061] like Figure 4 , Figure 8 and Figure 10 As shown, in some embodiments, the insulating guide plate 150 is provided with a clearance groove 158 extending along the second direction Y on the side near the explosion-proof valve 130. The clearance groove 158 and the explosion-proof valve 130 are arranged opposite each other along the third direction Z, and the first drainage channel 151 communicates with the clearance groove 158. In this way, the gas travel path can be shortened, making exhaust more rapid, and reducing the risk of the insulating guide plate 150 clogging the explosion-proof valve 130 in the event of thermal runaway.

[0062] like Figure 6 As shown, further, the dimension of the clearance groove 158 along the first direction X is H1, and the dimension of the clearance groove 158 along the third direction Z is H2, satisfying: H1 > H2. It can be understood that the clearance groove 158 has a length direction and a width direction, and the length direction is parallel to the first direction X, and the width direction is parallel to the third direction Z. In this way, the clearance groove 158 can receive more high temperature and high pressure gas from the first drainage channel 151 and disperse a large amount of gas to the explosion-proof valve 130 for discharge, thereby improving the exhaust efficiency of the battery cell 100.

[0063] It should be noted that the material of the insulating guide plate 150 in the battery cell 100 provided in this embodiment can be selected from the following categories: 1. Synthetic organic insulating materials: plastics (e.g., polyethylene, polyvinyl chloride, polypropylene, polytetrafluoroethylene, epoxy resin, etc.), synthetic rubbers (e.g., silicone rubber, nitrile rubber, etc.), synthetic fibers (e.g., polyester fiber, nylon, etc.); 2. Natural organic insulating materials: wood, natural rubber, etc.; 3. Inorganic insulating materials: ceramics, glass, mica, quartz, asbestos, etc.; 4. Polymer insulating materials: polycarbonate, polyimide, etc., without specific limitations. When the insulating guide plate 150 is made of plastic, it can melt under high temperature during the thermal runaway process of the battery cell 100, thereby creating a larger venting space.

[0064] Furthermore, the materials of the end cap 120 and / or the housing 110 can be aluminum, aluminum alloy, copper, iron, stainless steel, plastic, etc., without specific limitations. The materials of the electrode posts can be metallic conductive materials (such as copper, aluminum, silver, gold, iron, nickel, etc.) or non-metallic conductive materials (such as carbon-based materials, superconductors, semiconductors, etc.), without specific limitations.

[0065] It should be noted that the battery cell 100 provided in this embodiment mainly relies on the movement of metal ions between the positive and negative electrode plates to operate. The battery cell 100 can be cuboid, cylindrical, flat, or other shapes, and no specific limitation is made here. According to the packaging method, the battery cell 100 provided in this embodiment can be a square battery, a cylindrical battery, a pouch battery, etc., and no specific limitation is made here.

[0066] Furthermore, according to the classification of the physical state of the electrolyte, the battery cell 100 provided in this embodiment can be a liquid battery, that is, it uses a liquid electrolyte. For example, the battery cell 100 includes a positive electrode post 161 and a negative electrode post 162. The electrode assembly 140 can be manufactured by a winding process or a stacking process. The electrode assembly 140 includes an electrode body 142, a positive electrode tab 143 and a negative electrode tab 144. The electrode body 142 is immersed in the liquid electrolyte and includes a positive electrode plate, a negative electrode plate and a separator layer. The separator layer is disposed between the positive electrode plate and the negative electrode plate. The material of the separator layer can be PP (polypropylene), PE (polyethylene), etc. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive electrode tab 143 is connected to the positive current collector and to the positive electrode post 161. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative electrode tab 144 is connected to the negative current collector and to the negative electrode post 162. Taking lithium ions as an example, the materials of the positive current collector and the positive electrode tab 143 can be aluminum, and the materials of the positive active material layer can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganese oxide, etc. The materials of the negative current collector and the negative electrode tab 144 can be copper, and the negative active material can be graphite, silicon, etc.

[0067] Of course, the battery cell 100 provided in this embodiment can also be a solid-state battery, that is, a solid electrolyte, such as sulfide, oxide or polymer electrolyte. Solid electrolyte can replace the separator and liquid electrolyte, and has both ion conduction and isolation functions. The type of battery cell 100 is not specifically limited here.

[0068] To address the aforementioned technical problems, embodiments of this application also provide a battery pack, including the battery cell 100 from any of the above embodiments.

[0069] It is understood that since the battery pack provided in this embodiment has the battery cell 100 in any of the above embodiments, it has all the beneficial effects of the battery cell 100, which will not be described in detail here.

[0070] In the description of this specification, the references to terms such as "some embodiments," "one embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of 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.

[0071] 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 battery cell, characterized in that, It has a first direction (X), a second direction (Y), and a third direction (Z) that are mutually perpendicular to each other, and includes: Casing (110); End cap (120) is attached to one side of the housing (110); An explosion-proof valve (130) is connected to the side of the housing (110) away from the end cap (120), and the explosion-proof valve (130) and the end cap (120) are arranged opposite each other along the third direction (Z); Multiple electrode assemblies (140) are disposed at intervals within the housing (110) along the second direction (Y), with a gap (141) between adjacent electrode assemblies (140). At least one insulating drain plate (150) is located in the gap (141) between two adjacent electrode assemblies (140). The insulating drain plate (150) is provided with a first drain channel (151) extending along the third direction (Z) and a second drain channel (152) extending along the first direction (X). The first drain channel (151) and the second drain channel (152) are in communication.

2. The battery cell according to claim 1, characterized in that, The insulating drain plate (150) is provided with a third drain channel (153) that runs through the second direction (Y). The first drain channel (151) is indirectly connected to the gap (141) through the third drain channel (153) along the second direction (Y).

3. The battery cell according to claim 2, characterized in that, The first drainage channel (151), the second drainage channel (152) and the third drainage channel (153) are all provided in multiples. The multiple first drainage channels (151) are arranged at intervals along the first direction (X), the multiple second drainage channels (152) are arranged at intervals along the third direction (Z), and the multiple third drainage channels (153) are arranged in a rectangular array along the first direction (X) and the second direction (Y). The third drainage channel (153) is connected to the second drainage channel (152).

4. The battery cell according to claim 2, characterized in that, The insulating drain plate (150) includes a first plate (154), a second plate (155), a third plate (156), and a fourth plate (157). The first plate (154) and the second plate (155) are spaced apart along the second direction (Y), and the third plate (156) and the fourth plate (157) are spaced apart along the first direction (X). The third plate (156) and the fourth plate (157) are respectively spaced apart from the first plate (154) and the second plate (155). The plates (155) are connected, and the first plate (154), the second plate (155), the third plate (156) and the fourth plate (157) enclose to form the first drainage channel (151). The second drainage channel (152) passes through the third plate (156) and the fourth plate (157) along the first direction (X). The third drainage channel (153) passes through the first plate (154) and the second plate (155) along the second direction (Y).

5. The battery cell according to claim 4, characterized in that, Both the second drainage channel (152) and the third drainage channel (153) are provided in multiples. The multiple second drainage channels (152) are spaced apart along the third direction (Z), and the multiple third drainage channels (153) are arranged in a rectangular array along the first direction (X) and the second direction (Y).

6. The battery cell according to claim 1, characterized in that, The insulating drainage plate (150) is provided with a first drainage channel (151) and a second drainage channel (152) on both sides of the second direction (Y). The first drainage channel (151) is directly connected to the gap (141) along the second direction (Y).

7. The battery cell according to claim 6, characterized in that, The second drainage channel (152) is directly connected to the gap (141) along the second direction (Y).

8. The battery cell according to any one of claims 1 to 7, characterized in that, The insulating diversion plate (150) is provided with a relief groove (158) extending along the second direction (Y) on the side near the explosion-proof valve (130). The relief groove (158) and the explosion-proof valve (130) are arranged opposite to each other along the third direction (Z). The first diversion channel (151) is connected to the relief groove (158).

9. The battery cell according to claim 8, characterized in that, The clearance groove (158) has a dimension of H1 along the first direction (X) and a dimension of H2 along the third direction (Z), satisfying that: H1 > H2.

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

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