Battery shell, battery and electric device

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery shell, a battery and a power utilization device, the battery shell comprises a shell body, the shell body is provided with a containing cavity, an insulating layer is arranged on the inner wall of the containing cavity, the insulating layer is used for being melted to be formed on the surface of a steel needle when the steel needle pierces, and the steel needle penetrates through the shell body. The insulating layer is provided with a liquid storage cavity, and the liquid storage cavity is communicated with the accommodating cavity; in the needling test process of the battery, the steel needle penetrates into the battery to cause short circuit of the battery and increase of the internal temperature of the battery, and when the internal temperature of the battery reaches the melting point temperature of the insulating layer, the insulating layer is melted and formed on the surface of the steel needle, so that the steel needle can be in contact with a battery pole piece through the insulating layer when the steel needle is continuously pushed in; the direct contact between the steel needle and the battery pole piece is effectively avoided, so that the short circuit phenomenon of the battery is prevented from being further aggravated, the thermal runaway caused by continuous temperature rise in the battery is avoided, and the passing rate of the battery acupuncture test is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a battery casing, a battery and an electrical device. Background Art

[0002] As a new type of secondary battery, lithium-ion batteries have the advantages of high energy density and power density, high operating voltage, light weight, small size, long cycle life, good safety, and green environmental protection. They have broad application prospects in portable appliances, power tools, large-scale energy storage, electric transportation power supply, etc.

[0003] Currently, most safety incidents are caused by lithium-ion batteries being punctured by foreign objects, which in turn causes internal short circuit failure. Therefore, to ensure the safety and reliability of battery use, needle penetration or forced internal short circuit testing is listed as a mandatory national standard certification test item. However, when the battery undergoes a needle penetration test, the steel needle directly pierces the battery and comes into direct contact with the battery's electrode, which can easily cause a short circuit. As the steel needle continues to be pushed in, the battery short circuit phenomenon will be further aggravated, thereby generating a large amount of heat, which may eventually cause thermal runaway and cause the battery to fail. Utility Model Content

[0004] The purpose of the present utility model is to address the deficiencies of the prior art and provide a battery housing, a battery and an electrical device, which solve the technical problem in the prior art that during the battery penetration test, the continuous insertion of a steel needle aggravates the battery short circuit, ultimately causing battery failure and potential safety risks.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In the first aspect, the utility model provides a battery shell, including a shell body, the shell body having a accommodating cavity, the inner wall of the accommodating cavity is provided with an insulating layer, the insulating layer is used to melt and form on the surface of the steel needle when the steel needle is inserted, and a liquid storage cavity is provided on the insulating layer, and the liquid storage cavity is connected to the accommodating cavity.

[0007] Preferably, the thickness of the insulating layer is 0.05-0.25 mm.

[0008] Preferably, the liquid storage cavity is formed by being recessed from a side of the insulating layer away from the shell body toward the shell body.

[0009] Preferably, along the height direction of the shell body and / or along the circumferential direction of the shell body, the depth of the edge of the liquid storage cavity is less than the depth of the middle part of the liquid storage cavity.

[0010] Preferably, along the height direction of the shell body and / or along the circumferential direction of the shell body, the depth of the liquid storage cavity gradually decreases from the middle of the liquid storage cavity toward the edge of the liquid storage cavity.

[0011] Preferably, the depth of the middle portion of the liquid storage cavity is 0.015 to 0.035 mm.

[0012] Preferably, the width of the liquid storage cavity is 2 to 4 mm.

[0013] Preferably, the liquid storage chamber is provided in plurality, and the plurality of liquid storage chambers are spaced apart along the height direction of the shell body;

[0014] And / or, a plurality of the liquid storage chambers are arranged at intervals along the circumferential direction of the shell body.

[0015] In a second aspect, the present invention provides a battery, comprising a battery cell and the battery housing of the above embodiment, wherein the battery cell is disposed in the accommodating cavity.

[0016] In a third aspect, the present invention provides an electrical device comprising the battery of the above embodiment.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] The battery shell of the present invention has a housing body provided with a housing cavity for accommodating a battery cell, and an inner wall of the housing cavity is provided with an insulating layer. During the battery puncture test, a steel needle penetrates into the battery, causing a short circuit in the battery and raising the temperature inside the battery. When the temperature inside the battery reaches the melting point of the insulating layer, the insulating layer melts and forms on the surface of the steel needle, so that the steel needle can contact the battery pole piece through the insulating layer when the steel needle is continuously pushed in, effectively avoiding direct contact between the steel needle and the battery pole piece, thereby preventing the battery short circuit phenomenon from being further aggravated, thereby avoiding thermal runaway caused by continuous temperature rise inside the battery, and effectively improving the pass rate of the battery puncture test.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1This is a schematic structural diagram of the battery of the present utility model.

[0022] Figure 2 This is a schematic structural diagram of the insulating layer of the utility model.

[0023] Figure 3 This is another structural schematic diagram of the insulating layer of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the steel needle piercing the battery in the utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the utility model in which the steel needle is continuously pushed into the battery.

[0026] The description of the accompanying drawings is as follows:

[0027] 100. Battery;

[0028] 10. Battery case; 11. Shell body; 111. Accommodation cavity; 12. Insulation layer; 121. Liquid storage cavity;

[0029] 20. Battery cells;

[0030] 30. Top cover;

[0031] 200, steel needle;

[0032] a, height direction of the shell body; b, circumferential direction of the shell body; F, thickness of the insulating layer; G, depth of the edge of the liquid storage cavity; H, depth of the middle of the liquid storage cavity; J, width of the liquid storage cavity. DETAILED DESCRIPTION

[0033] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0034] Furthermore, the terms “first,” “second,” etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0035] In this utility model, the term "and / or" simply describes an association between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this utility model generally indicates that the related objects are in an "or" relationship.

[0036] The term "plurality" used in the utility model refers to two or more (including two).

[0037] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0038] The following will be combined with the Figures 1 to 5 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] The power-consuming device of the embodiment of the present invention includes a battery 100. The power-consuming device may be a car, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The car may be a fuel car, a gas car, or a new energy car, and the new energy car may be a pure electric car, a hybrid car, or an extended-range car, and the like; the spacecraft includes airplanes, rockets, space shuttles, and spacecraft, and the like; the electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiment of the present application does not impose any special restrictions on the above-mentioned power-consuming devices.

[0040] See also Figure 1 、 Figures 4-5 The battery 100 of the embodiment of the present invention includes a battery cell 20 and a battery housing 10 , and the battery cell 20 is disposed in the battery housing 10 .

[0041] See also Figures 1 to 5The battery shell 10 of the embodiment of the present invention includes a shell body 11, the shell body 11 has a accommodating cavity 111, the inner wall of the accommodating cavity 111 is provided with an insulating layer 12, the insulating layer 12 is used to melt and form on the surface of the steel needle 200 when the steel needle 200 is inserted, and a liquid storage cavity 121 is provided on the insulating layer 12, and the liquid storage cavity 121 is connected to the accommodating cavity 111.

[0042] Compared with the prior art, the battery shell 10 of the embodiment of the present invention has a shell body 11, and the shell body 11 has a accommodating cavity 111, which is used to accommodate the battery cell 20. The inner wall of the accommodating cavity 111 is provided with an insulating layer 12. During the acupuncture test of the battery 100, the steel needle 200 penetrates the battery 100, causing the battery 100 to short-circuit and the internal temperature of the battery 100 to rise. When the internal temperature of the battery 100 reaches the melting point of the insulating layer 12, the insulating layer 12 melts and forms on the surface of the steel needle 200, so that when the steel needle 200 is continuously pushed in, the steel needle 200 can contact the battery 100 electrode through the insulating layer 12, effectively avoiding direct contact between the steel needle 200 and the battery 100 electrode, thereby preventing the short circuit phenomenon of the battery 100 from being further aggravated, and further avoiding the continuous temperature rise inside the battery 100 to cause thermal runaway, effectively improving the pass rate of the battery 100 acupuncture test.

[0043] Specifically, the melting point temperature of the insulating layer 12 is greater than or equal to 60°C. During the thermal runaway process of the battery 100, the temperature inside the battery 100 will rise sharply. The thermal runaway stage of the battery 100 is generally divided into three stages, namely the self-heating stage (50°C-140°C), the thermal runaway stage (140°C-850°C), and the thermal runaway termination stage (850°C-normal temperature). The self-heating stage starts with the dissolution of the SEI film, causing the negative electrode to be exposed to the electrolyte, triggering an exothermic reaction. If there are no cooling measures, the SEI film will continue to decompose. The temperature in the thermal runaway stage exceeds 140°C, and the positive and negative electrode materials participate in the electrochemical reaction, resulting in a voltage drop and a large-scale short circuit. The reaction is violent, and a large amount of gas and heat are generated, which may cause material ejection and heat to spread to the surrounding battery cells 20. The thermal runaway termination stage will only end after the reactants are burned out.

[0044] Therefore, the melting point temperature of the insulating layer 12 is greater than or equal to 60°C, which effectively ensures that the insulating layer 12 can melt during the self-heating stage. When the insulating layer 12 melts, it can form a protective layer on the surface of the steel needle 200 as the steel needle 200 continues to be pushed into the battery 100. Since the protective layer is formed by the melting of the insulating layer 12, it effectively blocks the direct contact between the steel needle 200 and the battery 100 pole piece, thereby significantly reducing the risk of short circuit of the battery 100. This not only prevents the further aggravation of the short circuit phenomenon of the battery 100, but also blocks the internal continuous temperature rise chain caused by the short circuit, and ultimately avoids the occurrence of thermal runaway of the battery 100.

[0045] See also Figures 1 to 5 In some embodiments, the thickness F of the insulating layer 12 is 0.05 to 0.25 mm. By setting the thickness F of the insulating layer 12, the thickness F of the insulating layer 12 cannot be too thick or too thin. When the thickness F of the insulating layer 12 is too thick, that is, when the thickness F of the insulating layer 12 is greater than 0.25 mm, the insulating layer 12 occupies more space in the accommodating cavity 111 of the battery case 10, thereby squeezing the space occupied by the battery cell 20 in the accommodating cavity 111, thereby reducing the energy density of the battery 100. When the thickness F of the insulating layer 12 is too thin, that is, the thickness F of the insulating layer 12 is less than 0.05 mm, the amount of the insulating layer 12 used is reduced, resulting in a thinner thickness F of the insulating layer 12 formed on the steel needle 200 after melting. The overly thin insulating layer 12 is difficult to effectively isolate the tiny burrs or tip discharge phenomena of the battery 100 pole piece, making it impossible for the insulating layer 12 to prevent the aggravation of the short circuit phenomenon of the battery 100, resulting in continuous temperature rise inside the battery 100, leading to thermal runaway, which may cause the battery 100 to swell, leak or even explode, posing a serious safety hazard.

[0046] Therefore, the thickness F of the insulating layer 12 is set to 0.05-0.25 mm to ensure that the battery 100 has a high energy density while ensuring safety and reliability.

[0047] Specifically, the insulating layer 12 includes one or more combinations of the following:

[0048] Ceramics: alumina ceramics, zirconia ceramics or yttria ceramics.

[0049] Silicates: synthetic crystalline silicates or glassy silicates.

[0050] Oxides: silicon oxide or aluminum oxide.

[0051] Polymer Composite: Glass Fiber Reinforced Plastic.

[0052] Polymers: polytetrafluoroethylene, epoxy resin, silicone resin, polyester or phenolic resin.

[0053] It is understandable that the insulating layer 12 is formed on the inner wall of the accommodating cavity 111 by electrostatic powder spraying, which effectively ensures that the insulating layer 12 can be attached to the inner wall of the accommodating cavity 111 .

[0054] See also Figures 2-3 In some embodiments, the liquid storage chamber 121 is recessed from the side of the insulating layer 12 facing away from the shell body 11 toward the shell body 11. By recessing the insulating layer 12 to form the liquid storage chamber 121, the storage space of the accommodating chamber 111 can be effectively increased, allowing the shell body 11 of the same volume to accommodate more electrolyte, thereby improving space utilization.

[0055] See also Figures 2-3 In some embodiments, along the height direction a of the shell body 11 and / or along the circumferential direction b of the shell body 11, the depth G of the edge of the liquid storage cavity 121 is less than the depth H of the middle portion of the liquid storage cavity 121. By setting the depth of the liquid storage cavity 121 so that the depth G of the edge of the liquid storage cavity 121 is less than the depth H of the middle portion of the liquid storage cavity 121, the depth G of the edge of the liquid storage cavity 121 is effectively made shallower, and the depth H of the middle portion of the liquid storage cavity 121 is made deeper. During the charge and discharge process of the battery cell 20, the battery cell 20 expands and the insulating layer 12 is squeezed. The edges of the shallower liquid storage cavity 121 are easily deformed, while the deeper middle portion of the liquid storage cavity 121 can provide a larger space buffer, thereby effectively alleviating the pressure caused by the expansion of the battery cell 20, reducing the impact of the expansion of the battery cell 20 on the structure of the battery 100, and extending the service life of the battery 100.

[0056] Furthermore, along the height direction a of the shell body 11 and / or along the circumferential direction b of the shell body 11, the depth of the liquid storage chamber 121 gradually decreases from the middle of the liquid storage chamber 121 toward the edge of the liquid storage chamber 121. By setting the depth of the liquid storage chamber 121 so that the depth of the liquid storage chamber 121 gradually decreases from the middle of the liquid storage chamber 121 toward the edge of the liquid storage chamber 121, the sidewalls of the liquid storage chamber 121 form an inclined surface or curved surface that tilts toward the edge of the liquid storage chamber 121. This helps promote the flow and distribution of the electrolyte within the liquid storage chamber 121, thereby improving the charge and discharge efficiency of the battery 100.

[0057] Specifically, the cross-section of the liquid storage chamber 121 is in the shape of a crescent, a triangle, a trapezoid, a semicircle or a semi-ellipse.

[0058] See also Figures 2-3In some embodiments, the depth H of the middle portion of the liquid storage cavity 121 is 0.015 to 0.035 mm. By setting the depth H of the middle portion of the liquid storage cavity 121, the depth H of the middle portion of the liquid storage cavity 121 cannot be too deep or too shallow. When the depth H of the middle portion of the liquid storage cavity 121 is too shallow, that is, when the depth H of the middle portion of the liquid storage cavity 121 is less than 0.015 mm, the volume of the liquid storage cavity 121 is small, and there is less space for storing electrolyte. In the subsequent process of replenishing the battery 100, the performance of the battery 100 may be poor due to insufficient storage of electrolyte in the liquid storage cavity 121. When the depth H of the middle of the liquid storage cavity 121 is too deep, that is, the depth H of the middle of the liquid storage cavity 121 is greater than 0.035 mm, the liquid storage cavity 121 occupies more space in the direction of the thickness F of the insulating layer 12, and the thickness of the insulating layer 12 in the area where the liquid storage cavity 121 is located is compressed, and the amount of the insulating layer 12 is reduced, resulting in the thickness F of the insulating layer 12 formed on the steel needle 200 after melting being thinner. The overly thin insulating layer 12 is difficult to effectively isolate the tiny burrs or tip discharge phenomena of the battery 100 pole piece, making it impossible for the insulating layer 12 to avoid the aggravation of the short circuit phenomenon of the battery 100, resulting in the continuous temperature rise inside the battery 100, leading to thermal runaway, which may cause the battery 100 to swell, leak or even explode, posing a serious safety hazard.

[0059] Therefore, setting the depth H of the middle portion of the liquid storage chamber 121 to 0.015-0.035 mm not only ensures that the liquid storage chamber 121 has sufficient volume to store an appropriate amount of electrolyte, thereby meeting the electrolyte needs of the battery 100 during normal operation. This helps maintain the stable electrochemical reaction within the battery 100, ensuring that the battery 100 can continuously output stable electrical energy, while reducing performance degradation and the need for frequent refills caused by insufficient electrolyte. It also ensures that the thickness requirements of the insulating layer 12 in the area where the liquid storage chamber 121 are located are met, neither being too thick to waste material or increase the weight of the battery 100, nor too thin to affect its insulation effect. In this way, the insulating layer 12 can effectively isolate the tiny burrs or tip discharge phenomena of the battery 100 pole piece, preventing the occurrence of internal short circuits in the battery 100. Even if a small discharge phenomenon occurs, the insulating layer 12 can promptly block the current path, preventing the short circuit phenomenon from intensifying and the internal temperature of the battery 100 from continuing to rise.

[0060] Furthermore, the depth H of the middle part of the liquid storage chamber 121 is 0.015mm, 0.016mm, 0.018mm, 0.02mm, 0.023mm, 0.025mm, 0.027mm, 0.029mm, 0.03mm, 0.032mm, 0.034mm or 0.035mm, but is not limited to the listed values, and other values within the numerical range are also applicable.

[0061] See also Figures 2-3In some embodiments, the width J of the liquid storage cavity 121 is 2 to 4 mm. By setting the width J of the liquid storage cavity 121, the width J of the liquid storage cavity 121 cannot be too wide or too narrow. When the width J of the liquid storage cavity 121 is too wide, that is, the width J of the liquid storage cavity 121 is greater than 4 mm, the liquid storage cavity 121 occupies a large space on the insulating layer 12, the thickness of the insulating layer 12 in the area where the liquid storage cavity 121 is located is compressed, and the amount of insulating layer 12 used is reduced, resulting in a thinner thickness F of the insulating layer 12 formed on the steel needle 200 after melting. An overly thin insulating layer 12 is difficult to effectively isolate the tiny burrs or tip discharge phenomena of the battery 100 pole piece, making it impossible for the insulating layer 12 to prevent the aggravation of the short circuit phenomenon of the battery 100, resulting in the continuous temperature rise inside the battery 100, leading to thermal runaway, which may cause the battery 100 to swell, leak, or even explode, posing a serious safety hazard. When the width J of the liquid storage cavity 121 is too narrow, that is, the width J of the liquid storage cavity 121 is less than 2 mm, the volume of the liquid storage cavity 121 is small, and there is less space for storing electrolyte. In the subsequent process of replenishing the battery 100, the performance of the battery 100 may be poor due to insufficient storage of electrolyte in the liquid storage cavity 121.

[0062] Therefore, the width J of the liquid storage chamber 121 is set to 2 to 4 mm. Within this width range, the liquid storage chamber 121 can ensure sufficient space to effectively store electrolyte, support the normal operation of the battery 100 and subsequent rehydration needs, and avoid unnecessary compression of the insulating layer 12. The insulating layer 12 will not be too thick to waste material or increase the weight of the battery 100, nor will it be too thin to affect its insulation effect. In this way, the insulating layer 12 can effectively isolate the tiny burrs or tip discharge phenomena of the battery 100 pole piece, preventing the occurrence of internal short circuits in the battery 100. Even if a tiny discharge phenomenon occurs, the insulating layer 12 can promptly block the current path, preventing the aggravation of the short circuit phenomenon and the continuous increase in the internal temperature of the battery 100.

[0063] See also Figures 2-3 In some embodiments, a plurality of liquid storage cavities 121 are provided, and the plurality of liquid storage cavities 121 are spaced apart along the height direction a of the shell body 11; and / or the plurality of liquid storage cavities 121 are spaced apart along the circumferential direction b of the shell body 11. By providing a plurality of liquid storage cavities 121, the number of liquid storage cavities 121 is effectively increased, thereby improving the overall electrolyte storage capacity. In addition, the plurality of liquid storage cavities 121 are spaced apart along the height direction a of the shell body 11 and / or the circumferential direction b of the shell body 11, effectively making the plurality of liquid storage cavities 121 evenly distributed on the insulating layer 12, thereby making the electrolyte more evenly distributed inside the battery 100, helping to reduce the performance differences of the battery 100 caused by uneven distribution of the electrolyte. This helps to improve the overall performance and consistency of the battery 100 and extend the service life of the battery 100.

[0064] Furthermore, along the height direction a of the shell body 11 , five liquid storage chambers 121 are arranged at intervals in each row.

[0065] It is understandable that the battery housing 10 of the embodiment of the present invention further includes a top cover 30 , which covers the opening of the housing body 11 .

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A battery housing, characterized in that: The invention comprises a shell body (11), wherein the shell body (11) has a receiving cavity (111), an inner wall of the receiving cavity (111) is provided with an insulating layer (12), and the insulating layer (12) is used to melt and form on the surface of the steel needle (200) when the steel needle (200) is inserted, and a liquid storage cavity (121) is provided on the insulating layer (12), and the liquid storage cavity (121) is communicated with the receiving cavity (111).

2. The battery case according to claim 1, wherein: The thickness (F) of the insulating layer (12) is 0.05 to 0.25 mm.

3. The battery case according to claim 1, wherein: The liquid storage cavity (121) is formed by being recessed from a side of the insulating layer (12) away from the shell body (11) toward the shell body (11).

4. The battery case according to claim 3, wherein: Along the height direction (a) of the shell body (11) and / or along the circumferential direction (b) of the shell body (11), the depth (G) of the edge of the liquid storage cavity (121) is smaller than the depth (H) of the middle of the liquid storage cavity (121).

5. The battery case according to claim 4, wherein: Along the height direction (a) of the shell body (11) and / or along the circumferential direction (b) of the shell body (11), the depth of the liquid storage cavity (121) gradually decreases from the middle of the liquid storage cavity (121) toward the edge of the liquid storage cavity (121).

6. The battery case according to claim 3, wherein: The depth (H) of the middle portion of the liquid storage cavity (121) is 0.015 to 0.035 mm.

7. The battery case according to claim 1, wherein: The width (J) of the liquid storage cavity (121) is 2 to 4 mm.

8. The battery case according to any one of claims 1 to 7, wherein: There are a plurality of liquid storage cavities (121), and the plurality of liquid storage cavities (121) are spaced apart along the height direction (a) of the shell body (11); And / or, a plurality of the liquid storage chambers (121) are arranged at intervals along the circumferential direction (b) of the shell body (11).

9. A battery, characterized in that: The battery comprises a battery core (20) and the battery casing according to any one of claims 1 to 8, wherein the battery core (20) is arranged in the accommodating cavity (111).

10. An electrical device, characterized in that: A battery comprising the battery of claim 9.

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