A battery and an electric device

Abstract

The application discloses a battery and a power utilization device, the battery comprising a shell, an electric core and a top cover, the shell being provided with a containing cavity and an opening communicated with the containing cavity; the electric core is arranged in the containing cavity; the top cover is arranged on the opening to close the opening, the top cover has a protruding part protruding towards a side away from the electric core, the protruding part is provided with an explosion vent, and a pressure relief space is formed between the protruding part and the electric core; the utility model can significantly increase the distance between the explosion vent and the electric core, thereby effectively expanding the volume of the pressure relief space, not only avoiding the risk of blocking the explosion vent during the upward movement of the electric core after thermal runaway, but also ensuring that when the internal pressure of the battery abnormally rises, the gas can quickly and smoothly pass through the pressure relief space and be discharged from the explosion vent, thereby effectively relieving the pressure accumulation in the battery, further guaranteeing the exhaust efficiency of the battery, significantly improving the safety performance of the battery, effectively reducing the safety hidden danger caused by poor exhaust, and providing reliable protection for the safe use of the battery.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and more particularly to a battery and an electrical device. Background Technology

[0002] With the widespread application of electronic devices and the rapid development of new energy vehicles, the demand for batteries, as important energy storage devices, continues to rise. However, batteries face many safety challenges during use, among which the safety problems caused by abnormally high internal pressure are particularly prominent.

[0003] In existing square battery cells, when the explosion-proof valve is opened and thermal runaway occurs, the internal core moves upward and the internal aluminum melts and is ejected with the airflow, which can easily block the explosion-proof valve port, resulting in poor venting and potentially causing safety issues. Utility Model Content

[0004] This application provides a battery and electrical device that increases the explosion venting space between the battery cell and the top cover, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a battery is provided, comprising:

[0006] A housing, the housing having a receiving cavity and an opening communicating with the receiving cavity;

[0007] The battery cell is disposed in the accommodating cavity; and,

[0008] A top cover is provided on the opening to close the opening. The top cover has a protrusion that protrudes toward the side opposite to the battery cell. The protrusion is provided with an explosion-proof opening, and an explosion-proof space is formed between the protrusion and the battery cell.

[0009] In some embodiments, the top cover further includes a first main body portion and a second main body portion. Along the length direction of the housing, the first main body portion and the second main body portion are respectively disposed on both sides of the protrusion. The first main body portion is used to connect with one tab of the battery cell, and the second main body portion is used to connect with the other tab of the battery cell.

[0010] In this way, by connecting the first main body and the second main body to the two tabs of the battery cell respectively, the battery cell is more firmly fixed inside the battery casing.

[0011] In this way, when the battery experiences thermal runaway or other abnormal conditions, the heat and current near the tabs will not directly affect the normal operation of the explosion-proof port, thereby ensuring that the explosion-proof port can release internal pressure in a timely and effective manner, and preventing the battery from exploding or other safety accidents due to excessive pressure.

[0012] In some embodiments, along the length of the housing, the housing includes a first end and a second end disposed opposite to each other, a first main body portion connected between the first end and the protrusion, and a second main body portion connected between the second end and the protrusion.

[0013] In this way, by connecting the first main body and the second main body to the first and second ends of the housing and the protrusion respectively, the structure of the top cover can be made more symmetrical. The first main body and the second main body, as the main connecting parts, can firmly fix the top cover to the housing, ensuring that the battery will not loosen due to vibration or impact during use.

[0014] In some embodiments, the top cover further includes a first connecting portion, wherein the first main body portion and the protrusion are spaced apart along the thickness direction of the top cover, and the first connecting portion is obliquely connected between the protrusion and the first main body portion along the length direction of the housing; and / or,

[0015] The top cover also includes a second connecting portion. Along the thickness direction of the top cover, the second main body portion and the protrusion portion are spaced apart. Along the length direction of the housing, the second connecting portion is obliquely connected between the protrusion portion and the second main body portion.

[0016] This ensures that there is a certain distance between the battery cell's tab and the protrusion, so that the distance between the battery cell's tab and the first or second connection part is not too large, which facilitates the connection between the tab and the top cover.

[0017] This allows the first and second main body parts to better fit the shape of the opening, ensuring the connection between the top cover and the housing and enhancing the sealing between the top cover and the housing.

[0018] This ensures that the gas inside the battery can be smoothly discharged through the explosion-proof vent when the pressure is released, without leaking from other parts, further improving the safety and reliability of the battery.

[0019] In this way, the tilted first and second connecting parts can guide the molten material (such as aluminum) generated when the battery cell moves upward after thermal runaway away from the explosion-proof port, effectively avoiding the risk of the molten material blocking the explosion-proof port, ensuring that the explosion-proof port can still work normally under extreme conditions, and further improving the safety of the battery.

[0020] Furthermore, in this embodiment, the first main body and the second main body are arranged horizontally. Therefore, when the battery experiences thermal runaway, the first main body and the second main body can also restrict the upward movement of the battery cell, further avoiding the risk of molten material blocking the explosion-proof opening.

[0021] In some embodiments, the top cover further includes a first side plate and a second side plate. Along the width direction of the top cover, the first side plate and the second side plate are respectively disposed on both sides of the protrusion and are both connected to the housing and the protrusion.

[0022] Thus, the first and second side plates are respectively located on both sides of the protrusion, which can provide additional support for the protrusion, making the protrusion more stable when subjected to internal pressure and reducing the risk of deformation or cracking caused by local stress concentration.

[0023] Thus, the connection between the first and second side plates and the casing further enhances the sealing between the top cover and the casing, preventing external moisture and impurities from entering the battery, and ensuring that the gas inside the battery can be smoothly discharged through the explosion-proof vent when the pressure is released, without leaking from other parts.

[0024] In some embodiments, the top cover includes a first main body portion, a second main body portion, and a third connecting portion. Along the thickness direction of the top cover, the first main body portion and the second main body portion are spaced apart from the protrusion, and the first main body portion and the second main body portion are respectively connected to the protrusion through the third connecting portion.

[0025] In this way, the third connection can provide a more reliable connection, ensuring a stronger connection between the top cover and the housing, and reducing the risk of connection failure caused by uneven stress at the connection point.

[0026] It is understood that in this embodiment, the third connecting portion is arranged around the protrusion, and the protrusion protrudes from the connecting portion toward the side opposite to the battery cell.

[0027] In some embodiments, the top cover is formed by stamping in sequence.

[0028] Thus, when the top cover is stamped sequentially, the number of connection points is reduced, thereby lowering the safety risks caused by connection point failure. Precise stamping processes ensure stronger connections between each component, improving the overall structural reliability.

[0029] Furthermore, sequential stamping allows for better control over the forming precision and quality of each component.

[0030] In some embodiments, the top cover is formed by stamping in one piece.

[0031] Thus, by forming the top cover in a single stamping process, the number of steps in the production process can be significantly reduced, and multiple complex components can be integrated into a single structure, thereby greatly shortening production time and improving production efficiency. Single stamping can also reduce the cumulative errors caused by multiple processes, ensuring the dimensional accuracy and consistency of the product.

[0032] Furthermore, one-time stamping can maintain the continuity of materials, reduce structural weaknesses caused by welding or splicing processes, ensure the overall strength and rigidity of the top cover, and make it more stable when subjected to internal pressure and external impact.

[0033] In some embodiments, along the height direction of the housing, the housing includes a third end and a fourth end disposed opposite to each other, the third end being the end closer to the opening and the fourth end being the end farther from the opening;

[0034] The ratio of the minimum distance between the protrusion and the third end to the minimum distance between the protrusion and the fourth end is greater than or equal to 0.05 and less than or equal to 0.1.

[0035] By setting the ratio of the minimum distance between the protrusion and the third end to the minimum distance between the protrusion and the fourth end within the above parameter range, it is possible to avoid the distance between the protrusion and the top cover being too large, which would make the protrusion easily damaged by impacts from other objects, thereby preventing any impact on the airtightness of the battery.

[0036] In some embodiments, the minimum distance between the protrusion and the battery cell is greater than or equal to 12 mm and less than or equal to 17 mm.

[0037] By setting the above parameters, the distance between the protrusion and the battery cell is neither too large nor too small. This avoids the overall height of the battery being affected by an excessively large distance between the protrusion and the battery cell, and also avoids the phenomenon of the explosion-proof port being blocked due to an excessively small distance between the protrusion and the battery cell, thereby ensuring safe use.

[0038] It is understood that in this embodiment, the distance between the protrusion and the battery cell is 15mm.

[0039] In some embodiments, the volume of the explosion venting space is greater than or equal to 48800 mm². 2 And less than or equal to 68800mm 2 .

[0040] This avoids the overall size of the battery increasing due to an excessively large explosion vent volume, while also preventing the explosion vent from becoming blocked due to an excessively small explosion vent volume, thus ensuring safe use.

[0041] It is understood that, in this embodiment, the volume of the explosion venting space is 58800 mm². 2 .

[0042] In some embodiments, the battery further includes a positive terminal post disposed on the first main body portion for connection to the positive terminal tab of the battery cell; and,

[0043] The battery also includes a negative electrode post, which is disposed on the second main body for connection with the negative electrode tab of the battery cell.

[0044] In this way, by placing the positive and negative terminals in the first and second main body parts respectively, the positive and negative terminals of the battery cell can be directly connected to the corresponding terminals, which simplifies the battery assembly process, reduces connection steps, improves connection reliability, and reduces the problem of increased contact resistance and heat generation caused by poor connection.

[0045] In some embodiments, the battery further includes an insulating film disposed on the side of the top cover opposite to the battery cell for insulation of the side of the top cover away from the opening.

[0046] Thus, the insulating film is placed on the side of the top cover away from the battery cell, which can effectively prevent short circuits between the top cover and external conductive components.

[0047] In this way, by setting an insulating film on the outside of the top cover, leakage caused by contact with external conductive materials during battery use can be effectively prevented.

[0048] In this way, the insulating film also acts as an additional sealing layer, further enhancing the seal between the top cover and the casing. This design effectively prevents external moisture, dust, and other impurities from entering the battery, thereby extending the battery's lifespan and improving its reliability.

[0049] In some embodiments, the insulating film is provided with a first through hole, and the positive electrode post is exposed through the first through hole in the insulating film;

[0050] The insulating film has a second through hole, through which the negative electrode post is exposed in the insulating film; and...

[0051] The insulating film is provided with a third through hole, and the explosion-proof port is connected to the outside through the third through hole.

[0052] Thus, by setting the first through hole and the second through hole on the insulating film, the positive terminal and the negative terminal can be exposed on the insulating film through the first through hole and the second through hole respectively, ensuring a reliable connection between the positive terminal and the negative terminal and the external circuit, while avoiding the insulating film covering the terminal, thereby ensuring the normal transmission of current.

[0053] Thus, by setting a third through hole on the insulating film, the explosion-proof port can communicate with the outside through the through hole, ensuring that when the internal pressure of the battery rises abnormally, the explosion-proof port can release the pressure in a timely and effective manner, avoiding pressure accumulation and safety problems caused by the obstruction of the insulating film.

[0054] According to a second aspect of this application, an electrical device is provided, which includes the battery in the foregoing embodiments.

[0055] The beneficial effects of the embodiments of this utility model are as follows:

[0056] In the embodiments of this utility model, since the top cover includes a protrusion and an explosion-proof port is provided on the top cover, an explosion-proof space is formed between the protrusion and the battery cell. Therefore, the distance between the explosion-proof port and the battery cell can be increased, thereby increasing the size of the explosion-proof space. This is to prevent the battery cell from blocking the explosion-proof port during its upward movement after thermal runaway, and thus avoid the occurrence of safety problems.

[0057] In the embodiments of this utility model, by designing a protrusion on the top cover that protrudes away from the battery cell and setting an explosion-proof port on the protrusion, and forming an explosion-proof space between the protrusion and the battery cell, the distance between the explosion-proof port and the battery cell can be significantly increased, thereby effectively expanding the volume of the explosion-proof space.

[0058] In this way, not only is the risk of the battery cell blocking the explosion-proof vent during its upward movement after thermal runaway avoided, but it also ensures that when the internal pressure of the battery rises abnormally, the gas can be quickly and smoothly discharged from the explosion-proof vent through the vent space. This effectively alleviates the pressure accumulation inside the battery, further ensures the battery's venting efficiency, significantly improves the battery's safety performance, effectively reduces safety hazards caused by poor venting, and provides a reliable guarantee for the safe use of the battery. Attached Figure Description

[0059] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0060] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0061] Figure 1 This is a schematic diagram of the structure of a battery provided in an exemplary embodiment of this disclosure;

[0062] Figure 2 This is an exploded view of a first structure of a battery provided in an exemplary embodiment of this disclosure;

[0063] Figure 3 This is an internal cross-sectional view of a first battery structure provided in an exemplary embodiment of this disclosure;

[0064] Figure 4 yes Figure 1A schematic diagram of the first type of top cover structure in the battery shown;

[0065] Figure 5 yes Figure 1 A schematic diagram of the second structure of the top cover in the battery shown;

[0066] Figure 6 This is an exploded view of a second structure of a battery provided in an exemplary embodiment of this disclosure.

[0067] Explanation of reference numerals in the attached figures:

[0068] 1. Battery;

[0069] 11. Shell; 111. First end; 112. Second end; 113. Third end; 114. Fourth end;

[0070] 12. Battery cells;

[0071] 13. Top cover; 131. Protrusion; 1311. Explosion-proof opening; 1312. First side plate; 1313. Second side plate; 132. First main body; 133. Second main body; 134. First connecting part; 135. Second connecting part; 136. Third connecting part;

[0072] 14. Explosion-proof space;

[0073] 15. Positive terminal post;

[0074] 16. Negative terminal post;

[0075] 17. Insulating film; 171. First through hole; 172. Second through hole; 173. Third through hole. Detailed Implementation

[0076] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0077] This application provides a battery 1, please refer to... Figure 1 , Figure 1 This is a schematic diagram of the structure of battery 1 provided in an embodiment of this application.

[0078] A battery 1 includes a housing 11, a battery cell 12, and a top cover 13. The housing 11 has a receiving cavity and an opening communicating with the receiving cavity. The battery cell 12 is disposed in the receiving cavity. The top cover 13 is disposed on the opening to close the opening. The top cover 13 has a protrusion 131 protruding toward the side opposite to the battery cell 12. The protrusion 131 has an explosion-proof opening 1311. An explosion-proof space 14 is formed between the protrusion 131 and the battery cell 12.

[0079] In the embodiments of this utility model, by designing a protrusion 131 on the top cover 13 that protrudes away from the battery cell 12, and providing an explosion-proof port 1311 on the protrusion 131, and forming an explosion-proof space 14 between the protrusion 131 and the battery cell 12, the distance between the explosion-proof port 1311 and the battery cell 12 can be significantly increased, thereby effectively expanding the volume of the explosion-proof space 14.

[0080] In this way, not only is the risk of the cell 12 blocking the explosion-proof port 1311 during its upward movement after thermal runaway avoided, but it also ensures that when the internal pressure of the battery 1 rises abnormally, the gas can be quickly and smoothly discharged from the explosion-proof port 1311 through the explosion-proof space 14, thereby effectively alleviating the pressure accumulation inside the battery 1, further ensuring the venting efficiency of the battery 1, significantly improving the safety performance of the battery 1, effectively reducing the safety hazards caused by poor venting, and providing a reliable guarantee for the safe use of the battery 1.

[0081] It is understood that in some embodiments, an explosion-proof valve is provided on the explosion-proof port 1311.

[0082] The explosion-proof valve automatically opens to release excess pressure when the internal pressure of battery 1 rises abnormally. Therefore, it can effectively prevent battery 1 from exploding or causing other safety accidents due to excessive internal pressure.

[0083] Thus, by installing an explosion-proof valve on the explosion-proof port 1311, the gas inside the battery 1 can be discharged in a timely and safe manner.

[0084] In some embodiments, please refer to Figures 1 to 4 The top cover 13 also includes a first main body 132 and a second main body 133. Along the length of the housing 11, the first main body 132 and the second main body 133 are respectively disposed on both sides of the protrusion 131. The first main body 132 is used to connect with one tab of the battery cell 12, and the second main body 133 is used to connect with the other tab of the battery cell 12.

[0085] Thus, by connecting the first main body 132 and the second main body 133 to the two tabs of the battery cell 12 respectively, the battery cell 12 is more firmly fixed inside the battery casing 11.

[0086] In this way, when battery 1 experiences thermal runaway or other abnormal conditions, the heat and current near the tab will not directly affect the normal operation of the explosion-proof port 1311, thereby ensuring that the explosion-proof port 1311 can release internal pressure in a timely and effective manner, and preventing battery 1 from exploding or causing other safety accidents due to excessive pressure.

[0087] In some embodiments, please refer to Figures 1 to 4 Along the length of the housing 11, the housing 11 includes a first end 111 and a second end 112 disposed opposite to each other, a first main body 132 connected between the first end 111 and the protrusion 131, and a second main body 133 connected between the second end 112 and the protrusion 131.

[0088] Thus, by connecting the first main body 132 and the second main body 133 to the first end 111 and the second end 112 of the housing 11 and the protrusion 131 respectively, the structure of the top cover 13 can be made more symmetrical. The first main body 132 and the second main body 133, as the main connecting parts, can firmly fix the top cover 13 to the housing 11, ensuring that the battery 1 will not loosen due to vibration or impact during use.

[0089] In some embodiments, please refer to Figures 1 to 4 The top cover 13 also includes a first connecting portion 134. Along the thickness direction of the top cover 13, the first main body portion 132 and the protrusion 131 are spaced apart. Along the length direction of the housing 11, the first connecting portion 134 is obliquely connected between the protrusion 131 and the first main body portion 132; and / or,

[0090] The top cover 13 also includes a second connecting portion 135. Along the thickness direction of the top cover 13, the second main body portion 133 and the protrusion 131 are spaced apart. Along the length direction of the housing 11, the second connecting portion 135 is obliquely connected between the protrusion 131 and the second main body portion 133.

[0091] This ensures that there is a certain distance between the tab of the battery cell 12 and the protrusion 131, so that the distance between the tab of the battery cell 12 and the first connecting part 134 or the second connecting part 135 is not too large, which facilitates the connection between the tab and the top cover 13.

[0092] This allows the first main body portion 132 and the second main body portion 133 to better fit the shape of the opening, ensuring the connection between the top cover 13 and the housing 11 and enhancing the sealing between the top cover 13 and the housing 11.

[0093] In this way, the gas inside battery 1 can be smoothly discharged through the explosion-proof port 1311 when the pressure is released, without leaking from other parts, which further improves the safety and reliability of battery 1.

[0094] Thus, the tilted first connecting part 134 and the second connecting part 135 can guide the molten material (such as aluminum) generated when the cell 12 moves upward after thermal runaway away from the explosion-proof port 1311, effectively avoiding the risk of the molten material blocking the explosion-proof port 1311, ensuring that the explosion-proof port 1311 can still work normally under extreme conditions, and further improving the safety of the battery 1.

[0095] Furthermore, in this embodiment, the first main body 132 and the second main body 133 are arranged horizontally. Therefore, when the battery 1 experiences thermal runaway, the first main body 132 and the second main body 133 can also restrict the upward movement of the cell 12, further avoiding the risk of molten material blocking the explosion-proof port 1311.

[0096] In some embodiments, please refer to Figures 1 to 4 The top cover 13 also includes a first side plate 1312 and a second side plate 1313. Along the width direction of the top cover 13, the first side plate 1312 and the second side plate 1313 are respectively disposed on both sides of the protrusion 131 and are connected to the housing 11 and the protrusion 131.

[0097] Thus, the first side plate 1312 and the second side plate 1313 are respectively disposed on both sides of the protrusion 131, which can provide additional support for the protrusion 131, thereby making the protrusion 131 more stable when subjected to internal pressure and reducing the risk of deformation or breakage caused by local stress concentration.

[0098] Thus, the connection between the first side plate 1312 and the second side plate 1313 and the housing 11 can further enhance the sealing between the top cover 13 and the housing 11, which not only prevents external moisture and impurities from entering the battery 1, but also ensures that the gas inside the battery 1 can be smoothly discharged through the explosion-proof port 1311 when the pressure is released, without leaking from other parts.

[0099] In some embodiments, please refer to Figure 5 The top cover 13 includes a first main body 132, a second main body 133 and a third connecting part 136. Along the thickness direction of the top cover 13, the first main body 132 and the second main body 133 are spaced apart from the protrusion 131. The first main body 132 and the second main body 133 are respectively connected to the protrusion 131 through the third connecting part 136.

[0100] Thus, the third connection 136 can provide a more reliable connection, ensuring a stronger connection between the top cover 13 and the housing 11, and reducing the risk of connection failure due to uneven stress at the connection point.

[0101] It is understood that in this embodiment, the third connecting portion 136 is arranged around the protrusion 131, and the protrusion 131 protrudes from the first main body portion 132 or the second main body portion 133 on the side away from the battery cell 12.

[0102] In some embodiments, the top cover 13 is formed by stamping.

[0103] Thus, when the top cover 13 is stamped sequentially, the number of connection points can be reduced, thereby lowering the safety risks caused by connection point failure. Precise stamping processes ensure a stronger connection between each component, improving the overall structural reliability.

[0104] Furthermore, sequential stamping allows for better control over the forming precision and quality of each component.

[0105] In some embodiments, the top cover 13 is formed by stamping in one piece.

[0106] Thus, when the top cover 13 is formed in a single stamping process, the number of steps in the production process can be significantly reduced, and multiple complex components can be integrated into a single structure, thereby greatly shortening production time and improving production efficiency. Single stamping can also reduce the cumulative errors caused by multiple processes, ensuring the dimensional accuracy and consistency of the product.

[0107] Furthermore, one-time stamping can maintain the continuity of materials, reduce structural weaknesses caused by welding or splicing processes, ensure the overall strength and rigidity of the top cover 13, and make it more stable when subjected to internal pressure and external impact.

[0108] In some embodiments, along the height direction of the housing 11, the housing 11 includes a third end 113 and a fourth end 114 disposed opposite to each other, the third end 113 being the end closer to the opening and the fourth end 114 being the end farther away from the opening;

[0109] The ratio of the minimum distance between the protrusion 131 and the third end 113 to the minimum distance between the protrusion 131 and the fourth end 114 is greater than or equal to 0.05 and less than or equal to 0.1.

[0110] Thus, by setting the ratio of the minimum distance between the protrusion 131 and the third end 113 to the minimum distance between the protrusion 131 and the fourth end 114 within the above parameter range, it is possible to avoid the distance between the protrusion 131 and the top cover 13 being too large, which would make the protrusion 131 easily damaged by impacts from other objects, thereby preventing any impact on the airtightness of the battery 1.

[0111] In some embodiments, the minimum distance between the protrusion 131 and the battery cell 12 is greater than or equal to 12 mm and less than or equal to 17 mm.

[0112] By setting the above parameters, the distance between the protrusion 131 and the battery cell 12 is neither too large nor too small, thus avoiding the overall height of the battery 1 being affected by the excessive distance between the protrusion 131 and the battery cell 12, and also avoiding the phenomenon that the explosion-proof port cannot be blocked due to the excessive distance between the protrusion 131 and the battery cell 12, thereby ensuring safe use.

[0113] It is understood that in this embodiment, the distance between the protrusion 131 and the battery cell 12 is 15mm.

[0114] In some embodiments, the volume of the explosion relief space 14 is greater than or equal to 48800 mm². 2 And less than or equal to 68800mm 2 .

[0115] In this way, the overall size of the battery is not increased due to the excessive volume of the explosion vent 14, and the explosion vent is not blocked due to the excessively small volume of the explosion vent 14, thus ensuring safe use.

[0116] It is understood that, in this embodiment, the volume of the explosion venting space 14 is 58800 mm². 2 .

[0117] In some embodiments, please refer to Figures 1 to 4 The battery 1 also includes a positive terminal 15, which is disposed on the first main body portion 132 for connection with the positive terminal tab of the battery cell 12; and,

[0118] The battery 1 also includes a negative terminal post 16, which is disposed on the second main body 133 for connection with the negative terminal tab of the cell 12.

[0119] In this way, the positive electrode post 15 and the negative electrode post 16 are respectively set in the first main body part 132 and the second main body part 133, so that the positive electrode tab and the negative electrode tab of the cell 12 can be directly connected to the corresponding electrode post, which simplifies the assembly process of the battery 1, reduces the connection steps, improves the reliability of the connection, and reduces the problem of increased contact resistance and heat generation caused by poor connection.

[0120] In some embodiments, please refer to Figure 6 The battery 1 also includes an insulating film 17, which is disposed on the side of the top cover 13 away from the cell 12 for insulation of the side of the top cover 13 away from the opening.

[0121] Thus, the insulating film 17 is disposed on the side of the top cover 13 away from the battery cell 12, which can effectively prevent short circuits between the top cover 13 and external conductive components.

[0122] Thus, by providing an insulating film 17 on the outside of the top cover 13, leakage caused by contact with external conductive materials during use of the battery 1 can be effectively prevented.

[0123] Thus, the insulating film 17 also serves as an additional sealing layer, further enhancing the seal between the top cover 13 and the housing 11. This design effectively prevents external moisture, dust, and other impurities from entering the battery 1, thereby extending the battery 1's lifespan and improving its reliability.

[0124] In some embodiments, the insulating film 17 is provided with a first through hole 171, and the positive electrode post 15 is exposed on the insulating film 17 through the first through hole 171.

[0125] The insulating film 17 has a second through hole 172, through which the negative electrode post 16 is exposed to the insulating film 17; and,

[0126] The insulating film 17 is provided with a third through hole 173, and the explosion-proof port 1311 is connected to the outside through the third through hole 173.

[0127] Thus, by providing the first through hole 171 and the second through hole 172 on the insulating film 17, the positive electrode post 15 and the negative electrode post 16 can be exposed on the insulating film 17 through the first through hole 171 and the second through hole 172 respectively, ensuring a reliable connection between the positive electrode post 15 and the negative electrode post 16 and the external circuit, while avoiding the insulating film 17 covering the electrode post, thereby ensuring the normal transmission of current.

[0128] Thus, by providing a third through hole 173 on the insulating film 17, the explosion-proof port 1311 can communicate with the outside through the through hole, ensuring that when the internal pressure of the battery 1 rises abnormally, the explosion-proof port 1311 can release the pressure in a timely and effective manner, avoiding pressure accumulation and safety problems caused by the obstruction of the insulating film 17.

[0129] According to a second aspect of this disclosure, an electrical device is provided, which includes the battery 1 described above. This electrical device possesses all the beneficial effects of the battery 1, which will not be elaborated further herein.

[0130] In the description of this application, 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0131] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0132] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0133] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery, characterized in that, include: The housing (11) is provided with a receiving cavity and an opening communicating with the receiving cavity; A battery cell (12), wherein the battery cell (12) is disposed in the accommodating cavity; and, A top cover (13) is provided on the opening to close the opening. The top cover (13) has a protrusion (131) protruding away from the battery cell (12). The protrusion (131) is provided with an explosion-proof port (1311). An explosion-proof space (14) is formed between the protrusion (131) and the battery cell (12).

2. The battery according to claim 1, characterized in that, The top cover (13) also includes a first main body (132) and a second main body (133). Along the length direction of the housing (11), the first main body (132) and the second main body (133) are respectively disposed on both sides of the protrusion (131). The first main body (132) is used to connect with one tab of the battery cell (12), and the second main body (133) is used to connect with the other tab of the battery cell (12).

3. The battery according to claim 2, characterized in that, Along the length of the housing (11), the housing (11) includes a first end (111) and a second end (112) disposed opposite to each other, the first main body (132) is connected between the first end (111) and the protrusion (131), and the second main body (133) is connected between the second end (112) and the protrusion (131).

4. The battery according to claim 2, characterized in that, The top cover (13) further includes a first connecting portion (134). Along the thickness direction of the top cover (13), the first main body portion (132) and the protrusion (131) are spaced apart. Along the length direction of the housing (11), the first connecting portion (134) is obliquely connected between the protrusion (131) and the first main body portion (132); and / or, The top cover (13) further includes a second connecting part (135). Along the thickness direction of the top cover (13), the second main body part (133) and the protrusion (131) are spaced apart. Along the length direction of the housing (11), the second connecting part (135) is obliquely connected between the protrusion (131) and the second main body part (133).

5. The battery according to any one of claims 1-4, characterized in that, The top cover (13) also includes a first side plate (1312) and a second side plate (1313). Along the width direction of the top cover (13), the first side plate (1312) and the second side plate (1313) are respectively disposed on both sides of the protrusion (131) and are connected to the housing (11) and the protrusion (131).

6. The battery according to claim 1, characterized in that, The top cover (13) includes a first main body (132), a second main body (133), and a third connecting part (136). Along the thickness direction of the top cover (13), the first main body (132) and the second main body (133) are spaced apart from the protrusion (131), and the third connecting part (136) is arranged around the protrusion (131). The first main body (132) and the second main body (133) are respectively connected to the protrusion (131) through the third connecting part (136).

7. The battery according to any one of claims 1-4 and 6, characterized in that, Along the height direction of the housing (11), the housing (11) includes a third end (113) and a fourth end (114) disposed opposite to each other, the third end (113) being the end closer to the opening, and the fourth end (114) being the end farther away from the opening; The ratio of the minimum distance between the protrusion (131) and the third end (113) to the minimum distance between the protrusion (131) and the fourth end (114) is greater than or equal to 0.05 and less than or equal to 0.

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8. The battery according to any one of claims 1-4 and 6, characterized in that, The minimum distance between the protrusion (131) and the battery cell (12) is greater than or equal to 12 mm and less than or equal to 17 mm.

9. The battery according to any one of claims 1-4 and 6, characterized in that, The volume of the explosion vent (14) is greater than or equal to 48800 mm². 2 And less than or equal to 68800mm 2 .

10. The battery according to any one of claims 2-4 and 6, characterized in that, The battery (1) further includes a positive electrode post (15), which is disposed on the first main body portion (132) for connection with the positive electrode tab of the battery cell (12); and, The battery (1) further includes a negative electrode post (16), which is disposed on the second main body (133) for connection with the negative electrode tab of the cell (12).

11. The battery according to claim 10, characterized in that, The battery (1) also includes an insulating film (17) disposed on the side of the top cover (13) away from the cell (12) for insulation of the side of the top cover (13) away from the opening.

12. The battery according to claim 11, characterized in that, The insulating film (17) is provided with a first through hole (171), and the positive electrode post (15) is exposed through the first through hole (171) on the insulating film (17); The insulating film (17) is provided with a second through hole (172), and the negative electrode post (16) is exposed through the second through hole (172) to the insulating film (17); and, The insulating film (17) is provided with a third through hole (173), and the explosion-proof port (1311) is connected to the outside through the third through hole (173).

13. An electrical appliance, characterized in that, The battery (1) includes any one of claims 1-12.

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