Battery

Abstract

The utility model relates to a battery. The battery comprises a shell, a battery cell and a top cover assembly, the top cover assembly is arranged at the opening end of the shell and comprises a conductive cover plate, an insulating sheet, a protection plate and a pole, the conductive cover plate is in sealed connection with the inner side wall of the shell, the side, facing the battery cell, of the conductive cover plate is electrically connected with a positive lug or a negative lug of the battery cell, and the insulating sheet is arranged on the side, back to the battery cell, of the conductive cover plate; the protective plate is located between the conductive cover plate and the insulating sheet and electrically connected with the conductive cover plate, a groove is formed in the side, back to the battery cell, of the conductive cover plate, at least part of the protective plate is arranged in the groove, the insulating sheet is provided with a first through hole, the protective plate is provided with a second through hole, and one end of the pole protrudes out of the side, back to the conductive cover plate, of the insulating sheet. And one end of the pole is electrically connected with external electronic equipment, and the other end of the pole sequentially penetrates through the first through hole and the second through hole to be connected with the groove bottom of the groove. According to the battery, the assembly compactness of the protection plate and the top cover can be improved, so that the energy density can be increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage devices, in particular to a battery. BACKGROUND

[0002] With the development of electronic products, batteries are widely used. Some batteries include a battery steel shell, a battery cell, and a top cover assembly. The battery has an open end and a sealed end. The battery cell is arranged inside the battery steel shell. The top cover is sealed at the open end of the battery steel shell. The top cover has a positive pole that is electrically connected to the positive pole tab of the battery cell. The positive pole is used to connect the positive connection end of an external electronic device.

[0003] In order to improve the safety and reliability of the battery, the battery usually further includes a protection circuit board for protecting the battery cell.

[0004] However, the assembly of the protection circuit board and the top cover in the related art battery is not compact enough, and the space occupied in the battery steel shell is relatively large, resulting in a small energy density of the battery. UTILITY MODEL CONTENT

[0005] Therefore, it is necessary to provide a battery that can improve the compactness of the assembly of the protection board and the top cover, thereby facilitating the increase of the energy density.

[0006] The utility model provides a battery, which comprises:

[0007] a shell, the inside of the shell has a containing space, at least one end of the shell has an opening communicating with the containing space, forming an opening end;

[0008] a battery cell arranged in the containing space of the shell; and

[0009] a top cover assembly arranged at the opening end of the shell, the top cover assembly comprising a conductive cover plate, an insulating sheet, a protection board, and a pole, the conductive cover plate being sealingly connected with the inner side wall of the shell, one side of the conductive cover plate facing the battery cell being electrically connected with the positive pole tab or the negative pole tab of the battery cell, the insulating sheet being arranged on the side of the conductive cover plate away from the battery cell, the protection board being located between the conductive cover plate and the insulating sheet and being electrically connected with the conductive cover plate, the side of the conductive cover plate away from the battery cell being provided with a groove, at least part of the protection board being arranged in the groove, the insulating sheet being provided with a first through hole, the protection board being provided with a second through hole, one end of the pole protruding from the side of the insulating sheet away from the conductive cover plate for electrical connection with an external electronic device, the other end of the pole sequentially passing through the first through hole and the second through hole and being connected with the groove bottom.

[0010] In one of the embodiments, the groove comprises a mounting groove and a positioning groove communicated with the mounting groove, the groove bottom of the mounting groove is connected with the pole column, the groove opening end of the mounting groove is provided with the positioning groove, the protection plate comprises a main plate electrically connected with the conductive cover plate and a positioning protrusion connected with the main plate, the main plate is provided with the second through hole, the main plate is arranged in the mounting groove, the positioning protrusion is at least partially protruded from the peripheral side of the main plate, and the positioning protrusion is arranged in the positioning groove.

[0011] In one of the embodiments, the positioning protrusion is welded in the positioning groove.

[0012] And / or, the main plate is welded in the mounting groove.

[0013] In one of the embodiments, the inner wall of the mounting groove is provided with a support step, the support step is abutted with the main plate towards the groove bottom of the mounting groove, and the peripheral side of the main plate is welded with the inner side wall of the mounting groove between the opening end and the support step.

[0014] In one of the embodiments, the positioning protrusion is arranged on the side of the main plate away from the battery cell, and the positioning protrusion is flush with the side away from the battery cell.

[0015] In one of the embodiments, the positioning groove has at least two, the at least two positioning grooves are distributed at intervals on the conductive cover plate, the positioning protrusion has at least two, the at least two positioning protrusions are distributed at intervals on the main plate, the positioning protrusion corresponds to the positioning groove one by one, and the positioning protrusion is arranged in the corresponding positioning groove.

[0016] In one of the embodiments, the groove bottom of the mounting groove is provided with an anti-explosion groove.

[0017] In one of the embodiments, the top cover assembly further comprises a sealing ring, the sealing ring is sleeved on the peripheral side of the conductive cover plate, and the side of the sealing ring away from the conductive cover plate is abutted with the inner side wall of the shell.

[0018] In one of the embodiments, the conductive cover plate is connected with the positive tab of the battery cell, the shell comprises a conductive shell and an insulating layer arranged on the peripheral side of the conductive shell, the conductive shell has an open end and a sealed end, the battery cell is arranged in the conductive shell, the top cover assembly is arranged at the open end of the conductive shell, the inner side wall of the conductive shell is insulatedly connected with the conductive cover plate, and the sealed end of the conductive shell is electrically connected with the negative tab of the battery cell.

[0019] In one of the embodiments, the pole includes a first column and a second column connected with the first column, the first column passes through the first through hole, and an end of the first column away from the second column protrudes from a side of the insulating sheet opposite to the conductive cover plate, one end of the second column passes through the second through hole and is connected with the groove bottom, and a cross-sectional dimension of the second column is smaller than a cross-sectional dimension of the first column.

[0020] The battery has the groove on the side of the conductive cover plate opposite to the battery cell, and at least part of the protection plate is arranged in the groove, so that at least part of the protection plate is embedded in the conductive cover plate, the compactness between the protection plate and the conductive cover plate is improved, the occupation of the protection plate to the internal space of the shell is reduced, and the energy density of the battery can be improved without increasing the overall size of the battery. In addition, the conductive cover plate has the electrical conductivity, the conductive cover plate is electrically connected with the positive or negative tab of the battery cell, one end of the pole passes through the first through hole of the insulating sheet and the second through hole of the circuit board in sequence and is connected with the groove bottom, so that the pole can be electrically connected with the positive or negative tab of the battery cell through the conductive cover plate, the conductive cover plate does not need to be punched to pass through the pole, and the leakage of liquid from the hole in the conductive cover plate in the internal space of the shell is avoided, and the safety and reliability of the battery are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A perspective view of the battery according to some embodiments of the present application.

[0022] Figure 2 An exploded view of the battery according to some embodiments of the present application.

[0023] Figure 3 A sectional view of the battery according to some embodiments of the present application.

[0024] Figure 4 A Figure 3 An enlarged view of A in FIG.

[0025] Figure 5 A perspective view of the top cover assembly according to some embodiments of the present application.

[0026] Figure 6 A Figure 5 A structure diagram of the top cover assembly after removing the insulating sheet.

[0027] Figure 7 A structure diagram of the pole and the protection plate according to some embodiments.

[0028] In the drawings:

[0029] 1. Outer shell; 11. Conductive shell; 12. Insulating layer; 2. Battery cell; 3. Top cover assembly; 31. Terminal post; 311. First post; 312. Second post; 32. Protective plate; 321. Positioning protrusion; 322. Main board; 3221. Second through hole; 33. Conductive cover plate; 331. Groove; 3311. Positioning groove; 3312. Mounting groove; 332. Support step; 333. Explosion-proof groove; 34. Sealing ring; 35. Insulating sheet; 351. First through hole. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In the present application, unless specifically defined otherwise, if there is an appearance of the terms "installation", "connection", "connection", "fixation" and the like, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the present application, unless specifically defined otherwise, if there is a description of the first feature "on" or "below" the second feature and the like, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0035] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0036] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 shows a schematic diagram of a battery in an embodiment of the present application; Figure 2 shows an exploded view of the battery described in some embodiments of the present application; Figure 3 shows a cross-sectional view of the battery described in some embodiments of the present application; Figure 4 for Figure 3The battery provided by the embodiment of the present application can be a rechargeable battery or a disposable battery (i.e. a non-rechargeable battery). The battery comprises a shell 1, a battery cell 2 and a top cover assembly 3. The shell 1 has an accommodating space inside, and at least one end of the shell 1 has an opening communicating with the accommodating space, forming an opening end. The battery cell 2 is arranged in the accommodating space of the shell 1, and the top cover assembly 3 is arranged at the opening end of the shell 1. In the embodiment, the battery cell 2 is made of lithium battery electrochemical materials, so that the battery is a lithium battery, and the lithium battery has more stable charging and discharging voltage and higher energy density. In combination with Figure 5 The top cover assembly 3 comprises a conductive cover plate 33, an insulating sheet 35, a protection plate 32 and a pole 31. The conductive cover plate 33 is sealingly connected to the inner side wall of the shell 1, and the side of the conductive cover plate 33 facing the battery cell 2 is electrically connected to the positive or negative tab of the battery cell 2. The insulating sheet 35 is arranged on the side of the conductive cover plate 33 away from the battery cell 2, the protection plate 32 is arranged between the conductive cover plate 33 and the insulating sheet 35 and is electrically connected to the conductive cover plate 33, the conductive cover plate 33 is provided with a groove 331 on the side away from the battery cell 2, and at least part of the protection plate 32 is arranged in the groove 331. The insulating sheet 35 is provided with a first through hole 351, the protection plate 32 is provided with a second through hole 3221, one end of the pole 31 protrudes from the side of the insulating sheet 35 away from the conductive cover plate 33 and is used to be electrically connected to an external electronic device, and the other end of the pole 31 is sequentially connected to the bottom of the groove 331 through the first through hole 351 and the second through hole 3221. The insulating sheet 35 can be a barley paper sheet, a PET (polyethylene terephthalate) sheet, a PI (polyimide) sheet, a PP (polypropylene) sheet or a PTFE (polytetrafluoroethylene) sheet.

[0037] It can be understood that the protection plate 32 is a circuit board, and a plurality of electronic elements for providing protection and monitoring management are arranged on the protection plate 32. The protection plate 32 can protect and monitor the battery cell 2, and can perform overcharge protection, overdischarge protection, overcurrent protection and short circuit protection on the battery cell 2. The monitoring management includes power monitoring and optional state indication, and the like. Through the cooperation of the electronic elements and the battery cell 2, the battery can be safely charged, used and stably supply power to external power consumption devices. In the case that the battery is a rechargeable battery, the protection plate 32 is provided with a charging interface.

[0038] The battery with the structure has the groove 331 on the side of the conductive cover plate 33 away from the battery cell 2, at least part of the protection plate 32 is arranged in the groove 331, at least part of the protection plate 32 is embedded in the conductive cover plate 33, the compactness between the protection plate 32 and the conductive cover plate 33 is improved, the space occupied by the protection plate 32 in the inside of the shell 1 is reduced, and then the energy density of the battery can be improved without increasing the overall size of the battery. In addition, since the conductive cover plate 33 has a conductive property, the conductive cover plate 33 is electrically connected with the positive or negative tab of the battery cell 2, one end of the pole 31 passes through the first through hole 351 of the insulating sheet 35 and the second through hole 3221 of the circuit board in sequence and is connected with the groove bottom of the groove 331, so that the pole 31 can be electrically connected with the positive or negative tab of the battery cell 2 through the conductive cover plate 33, the conductive cover plate 33 does not need to be punched through the pole 31, thereby avoiding the leakage of liquid from the hole in the inside of the shell 1 at the conductive cover plate 33, and ensuring the safety and reliability of the battery.

[0039] In some embodiments, referring to Figure 1 , the groove 331 includes a mounting groove 3312 and a positioning groove 3311 in communication with the mounting groove 3312, the groove bottom of the mounting groove 3312 is connected with the pole 31, the mounting groove 3312 is provided with the positioning groove 3311 at the groove opening end, referring to Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 7 , the protection plate 32 includes a main plate 322 electrically connected with the conductive cover plate 33 and a positioning protrusion 321 connected with the main plate 322, the main plate 322 is provided with the second through hole 3221, in actual implementation, the electronic element is mounted on the main plate 322, the main plate 322 is arranged in the mounting groove 3312, the positioning protrusion 321 at least partially protrudes from the peripheral side of the main plate 322, and the positioning protrusion 321 is fixed in the positioning groove 3311. In actual implementation, the electronic element is mounted on the side of the main plate 322 facing the groove bottom of the mounting groove 3312, the mounting groove 3312 provides space for the main plate 322 and the electronic element, since the positioning protrusion 321 is connected with the main plate 322, the positioning groove 3311 is arranged at the groove opening end of the mounting groove 3312, and the main plate 322 can be positioned through the cooperation of the positioning protrusion 321 and the positioning groove 3311, which is beneficial to improving the assembly speed of the protection plate 32 and the conductive cover plate 33. The positioning groove 3311 and the mounting groove 3312 are both formed by stamping the conductive cover plate 33.

[0040] In actual implementation, the positioning protrusion 321 is welded in the positioning groove 3311, which limits the relative rotation of the positioning protrusion 321 relative to the conductive cover plate 33, thereby limiting the relative position of the protection plate 32 and the conductive cover plate 33. For example, the positioning protrusion 321 is welded in the positioning groove 3311 by soldering. Of course, in other examples, the positioning protrusion 321 can also be fixed in the positioning groove 331 by fixing glue or the like.

[0041] In the case that the positioning protrusion 321 is welded in the positioning groove 3311, in order to further limit the movement of the main plate 322 relative to the conductive cover plate 33 and prevent the main plate 322 from being loose from the conductive cover plate 33, the main plate 322 is welded in the mounting groove 3312, so that the positioning protrusion 321 and the main plate 322 are both welded with the conductive cover plate 33, and the reliability of the connection between the protection plate 32 and the conductive cover plate 33 is improved. Of course, in actual implementation, the positioning protrusion 321 can also be welded in the positioning groove 3311 only, or the main plate 322 can also be welded in the mounting groove 3312 only according to needs.

[0042] In some embodiments, referring to Figure 3 and Figure 4 , the inner wall of the mounting groove 3312 is provided with a support step 332, the support step 332 abuts against the side of the main plate 322 facing the groove bottom of the mounting groove 3312, and the outer circumferential side of the main plate 322 is welded with the inner side wall of the mounting groove 3312 between the opening end and the support step 332. By providing the support step 332 on the inner wall of the mounting groove 3312, the support step 332 can be used to support the main plate 322, which is conducive to dispersing the stress of the positioning protrusion 321 and preventing the main plate 322 from being deformed due to the deformation of the positioning protrusion 321. Welding the outer circumferential side of the main plate 322 with the inner side wall of the mounting groove 3312 between the opening end and the support step 332 can increase the welding position of the protection plate 32 and the conductive cover plate 33, and further prevent the protection plate 32 from being loose from the conductive cover plate 33.

[0043] In order to further reduce the occupation of the space outside the conductive cover plate 33 by the protection plate 32, the positioning protrusion 321 is arranged on the side of the main plate 322 away from the battery cell 2, and the positioning protrusion 321 is flush with the side away from the battery cell 2, which can further improve the energy density of the battery, and the protection plate 32 can have sufficient thickness to prevent deformation due to the small thickness of the protection plate 32.

[0044] In some embodiments, the positioning groove 3311 has at least two, the at least two positioning grooves 3311 are distributed at intervals on the conductive cover plate 33, the positioning protrusion 321 has at least two, the at least two positioning protrusions 321 are distributed at intervals on the main plate 322, the positioning protrusion 321 corresponds to the positioning groove 3311 in one-to-one correspondence, and the positioning protrusion 321 is arranged in the corresponding positioning groove 3311. The at least two positioning protrusions 321 and the positioning grooves 3311 are arranged in one-to-one correspondence, which increases the positioning position of the protection plate 32 at the opening end of the mounting groove 3312, so that the protection plate 32 can be placed smoothly in the conductive cover plate 33.

[0045] Exemplarily, the positioning grooves 3311 and the positioning protrusions 321 are both two. Of course, in other examples, the number of the positioning grooves 3311 and the positioning protrusions 321 can be flexibly adjusted as needed, for example, the number of the positioning grooves 3311 and the positioning protrusions 321 can be set to one, or three, or four, etc., and the number of the positioning grooves 3311 or the positioning protrusions 321 is not specifically limited herein.

[0046] It can be understood that a large amount of gas generated in the battery shell due to abnormal conditions such as short circuit, overcharge, overdischarge or extrusion will cause the gas pressure in the battery shell to rise, and therefore, the explosion-proof groove 333 is arranged at the bottom of the mounting groove 3312, and the bottom of the mounting groove 3312 is the weakest part in the conductive cover plate 33 at the position of the explosion-proof groove 333. When the gas pressure in the battery shell exceeds the set value, the high-pressure gas in the battery shell can break through the position of the explosion-proof groove 333 of the conductive top cover, thereby relieving the pressure of the battery.

[0047] In the example, the thickness of the bottom of the mounting groove 3312 corresponding to the explosion-proof groove 333 is 0.015 mm, which ensures that when the gas pressure in the battery shell is greater than 0.35 Mpa, the explosion-proof groove 333 can relieve the pressure.

[0048] Some embodiments, refer to Figure 4 and Figure 6 The top cover assembly 3 further comprises a sealing ring 34, which is sleeved on the outer circumferential side of the conductive cover plate 33, and the side of the sealing ring 34 away from the conductive cover plate 33 abuts against the inner side wall of the shell 1. This design makes the gap between the conductive cover plate 33 and the shell 1 sealed by the sealing ring 34, so that the conductive cover plate 33 and the shell 1 have good sealing performance, and the phenomenon of battery liquid leakage is avoided.

[0049] Some embodiments, refer to Figure 3 and Figure 4The conductive cover plate 33 is connected with the positive pole lug of the battery cell 2. The shell 1 comprises a conductive shell 11 and an insulating layer 12 arranged on the outer circumferential side of the conductive shell 11. In the embodiment, the conductive shell 11 is a stainless steel shell. The conductive shell 11 has an open end and a sealed end. The battery cell 2 is arranged in the conductive shell 11. The open end of the conductive shell 11 is provided with the top cover assembly 3. The inner side wall of the conductive shell 11 is insulatedly connected with the conductive cover plate 33. The sealed end of the conductive shell 11 is electrically connected with the negative pole lug of the battery cell 2. In the case that the top cover assembly 3 is provided with a sealing ring 34, the sealing ring 34 is an insulator. The conductive cover plate 33 is insulatedly connected with the conductive shell 11 through the sealing ring 34. In actual implementation, the inner side wall of the conductive shell 11 is provided with a sealing groove formed by a rolling groove process. The sealing ring 34 is arranged in the sealing groove, so that the conductive shell 11 and the conductive cover plate 33 are well sealed. Since the conductive cover plate 33 is connected with the positive pole lug of the battery cell 2 and the sealed end of the conductive shell 11 is electrically connected with the negative pole lug of the battery cell 2, the pole 31 is the positive pole of the battery, and the conductive shell 1 is the negative pole of the battery. The conductive cover plate 33 is insulatedly connected with the conductive shell 11, so as to prevent the positive pole and the negative pole of the battery from being connected and causing short circuit. The insulating layer 12 is arranged on the outer circumferential side of the conductive shell 11, so as to insulate and protect the outer circumferential side of the conductive shell 11. The sealed end of the conductive shell 11 is electrically connected with the external electronic device as the negative pole of the battery, so as to facilitate the use of the battery.

[0050] In actual implementation, the conductive cover plate 33 can be made of metal such as aluminum or stainless steel. The positive pole output terminal of the protection plate 32 is electrically connected with the conductive cover plate 33.

[0051] Referring to Figure 2 and Figure 4The pole 31 comprises a first pole body 311 and a second pole body 312 connected with the first pole body 311. The first pole body 311 penetrates the first through hole 351, and an end of the first pole body 311 away from the second pole body 312 protrudes from a side of the insulating sheet 35 opposite to the conductive cover plate 33. An end of the second pole body 312 away from the first pole body 311 penetrates the second through hole 3221 and is connected with the bottom of the groove 331. In the embodiment, the end of the second pole body 312 away from the first pole body 311 penetrates the second through hole 3221 and is connected with the bottom of the mounting groove 3312. The cross-sectional size of the second pole body 312 is smaller than that of the first pole body 311. It can be understood that, since the first pole body 311 is used for electrical connection with external electronic devices, the cross-sectional size of the second pole body 312 is set to be larger than that of the second pole body 312, so as to facilitate the connection of the first pole body 311 with external electronic devices. Since the end of the second pole body 312 penetrates the second through hole 3221 of the protection plate 32, the cross-sectional size of the second pole body 312 is set to be smaller than that of the first pole body 311. A smaller second through hole 3221 can be arranged on the protection plate 32, so that part of the second pole body 312 is embedded in the protection plate 32, the occupation of the protection plate 32 by the second through hole 3221 is reduced, and sufficient space is provided on the protection plate 32 for arranging electronic elements. It should be noted that, in the present specification, the cross-sectional size of the first pole body 311 refers to the area size of the cross section obtained by cutting the first pole body 311 along a direction parallel to the conductive cover plate 33. In the present specification, the cross-sectional size of the second pole body 312 refers to the area size of the cross section obtained by cutting the second pole body 312 along a direction parallel to the conductive cover plate 33.

[0052] Exemplarily, the battery cell 2 is a winding battery cell 2. Of course, in other examples, other types of battery cells 2 can be selected, and the type of the battery cell 2 is not specifically limited herein.

[0053] In actual implementation, the pole 31, the protection plate 32, the conductive cover plate 33 and the insulating sheet 35 are assembled to form a combined body, the sealing ring 34 is sleeved on the outer circumferential side of the conductive cover plate 33 to form the top cover assembly 3, the conductive cover plate 33 of the top cover assembly 3 is connected with the positive electrode tab of the battery cell 2, the battery cell 2 is put into the shell, the top cover assembly 3 is arranged at the open end of the conductive shell 11 of the shell 1, the negative electrode of the battery cell 2 is connected with the sealing end of the conductive shell 11, the electrolyte is added to the inside of the shell 1, the top cover assembly 3 is sealed with the shell 1, and finally the insulating layer 12 is wrapped on the outer circumferential side of the conductive shell 11 to form the battery.

[0054] It can be understood that batteries are used in various electronic devices such as digital cameras, handheld small fans, portable radios, electronic toys, and mice, and the capacity of the battery means that the electronic device has a longer endurance, and therefore the battery of the present application can effectively improve the endurance of the electronic device.

[0055] It should be noted that the battery of the present application can be AAA (7# battery), AA (5# battery), C (2# battery) or D (1# battery), and the battery of the present application can be a cylindrical battery, or a square battery, or other types of batteries, and the battery model or shape is not specifically limited.

[0056] In addition, the battery can be a lithium battery, but can also be other types of batteries, such as alkaline batteries or nickel-based batteries.

[0057] The technical features of the above embodiments can be combined in any way, and in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, but as long as the combination of the technical features does not exist Contradiction, it should be considered within the scope of the present application.

[0058] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be construed as limiting the scope of the patent application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent protection of the present application should be subject to the appended claims.

Claims

1. A battery, characterized in that, include: The outer casing has an internal accommodating space, and at least one end of the outer casing has an opening communicating with the accommodating space, forming an open end; A battery cell, wherein the battery cell is disposed in the accommodating space of the housing; and A top cover assembly is disposed at the opening end of the housing. The top cover assembly includes a conductive cover plate, an insulating sheet, a protective plate, and a terminal post. The conductive cover plate is sealed to the inner wall of the housing. The side of the conductive cover plate facing the battery cell is electrically connected to the positive or negative electrode tab of the battery cell. The insulating sheet is disposed on the side of the conductive cover plate facing away from the battery cell. The protective plate is located between the conductive cover plate and the insulating sheet and is electrically connected to the conductive cover plate. A groove is provided on the side of the conductive cover plate facing away from the battery cell. At least a portion of the protective plate is disposed in the groove. The insulating sheet has a first through hole, and the protective plate has a second through hole. One end of the terminal post protrudes from the side of the insulating sheet facing away from the conductive cover plate for electrical connection with an external electronic device. The other end of the terminal post passes through the first through hole and the second through hole in sequence and connects to the bottom of the groove.

2. The battery according to claim 1, characterized in that, The groove includes an installation groove and a positioning groove communicating with the installation groove. The bottom of the installation groove is connected to the pole post, and the positioning groove is provided at the opening end of the installation groove. The protective plate includes a main board electrically connected to the conductive cover plate and a positioning protrusion connected to the main board. The main board is provided with the second through hole. The main board is disposed in the installation groove. The positioning protrusion at least partially protrudes from the periphery of the main board and is fixed in the positioning groove.

3. The battery according to claim 2, characterized in that, The positioning protrusion is welded into the positioning groove; And / or, the motherboard is soldered into the mounting slot.

4. The battery according to claim 2, characterized in that, The inner wall of the mounting groove is provided with a support step, which abuts against the side of the main board facing the bottom of the mounting groove. The outer periphery of the main board is welded to the inner wall of the mounting groove located between the opening end and the support step.

5. The battery according to claim 2, characterized in that, The positioning protrusion is disposed on the side of the motherboard facing away from the battery cell, and the positioning protrusion is flush with the side facing away from the battery cell.

6. The battery according to claim 2, characterized in that, The positioning groove has at least two slots, which are spaced apart on the conductive cover plate. The positioning protrusion has at least two protrusions, which are spaced apart on the motherboard. The positioning protrusions correspond one-to-one with the positioning grooves, and the positioning protrusions are disposed in the corresponding positioning grooves.

7. The battery according to claim 2, characterized in that, The bottom of the mounting slot is provided with an explosion-proof groove.

8. The battery according to claim 1, characterized in that, The top cover assembly also includes a sealing ring, which is sleeved on the outer periphery of the conductive cover plate, and the side of the sealing ring facing away from the conductive cover plate abuts against the inner wall of the outer shell.

9. The battery according to any one of claims 1 to 8, characterized in that, The conductive cover plate is connected to the positive electrode tab of the battery cell. The outer shell includes a conductive shell and an insulating layer disposed on the outer peripheral side of the conductive shell. The conductive shell has a structure with one end open and the other end sealed. The battery cell is disposed inside the conductive shell. The top cover assembly is disposed at the open end of the conductive shell. The inner sidewall of the conductive shell is insulated from the conductive cover plate, and the sealed end of the conductive shell is electrically connected to the negative electrode tab of the battery cell.

10. The battery according to any one of claims 1 to 8, characterized in that, The pole post includes a first column and a second column connected to the first column. The first column passes through the first through hole, and the end of the first column away from the second column protrudes from the side of the insulating sheet facing away from the conductive cover plate. One end of the second column passes through the second through hole and is connected to the bottom of the groove. The cross-sectional dimension of the second column is smaller than that of the first column.

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