Top cover assembly, battery and electric equipment

Abstract

The utility model provides a top cover assembly, a battery and electric equipment, the top cover assembly comprises a cover plate and an insulation structure, the insulation structure comprises a main body and an overturning body; the main body is connected to one surface, facing a battery cell, of the cover plate, and the turnover body is rotatably connected to a long edge, close to one side of a lug root part of the battery cell, of the main body; a supporting structure and a receding opening allowing the tab to penetrate through are arranged between the overturning body and the main body, and the supporting structure is arranged close to the rotating connecting position of the overturning body and the main body so as to support the tab and the cover plate when the overturning body is clamped between the tab and the battery cell, so that the tab is prevented from pulling the top cover assembly downwards, and the battery cell is prevented from being damaged. The phenomenon that the cover plate sinks on one side of the root part of the lug is avoided to a certain extent, so that the stress on the two sides of the cover plate is relatively uniform, the energy density of the single-cell lithium battery is improved to a certain extent, and the service life of the single-cell lithium battery is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a top cover assembly, battery and electric equipment. BACKGROUND

[0002] Lithium battery has the advantages of high energy density, long service life, green environmental protection and the like, and is widely applied to new energy vehicles, communication base stations, portable electrical appliances and the like as energy storage equipment.

[0003] Single cell lithium battery usually comprises a shell, a cell, a top cover assembly, and a lower plastic. The shell is a cavity structure with one end open, the cell is installed in the shell, and the top cover assembly is installed at the open end of the shell, so that the inside of the shell is in a sealed state. The top cover assembly is provided with a pole, and the top surface of the cell is provided with a tab. The lower plastic is located between the top cover assembly and the cell and plays an insulating isolation role between the top cover assembly and the cell, and an avoiding opening is formed at a position corresponding to the pole on the lower plastic, and the pole passes through the avoiding opening and is connected with the tab. The tab has a downward pulling force on the top cover assembly through the pole.

[0004] However, the existing single cell lithium battery, the two sides of the top cover assembly are unevenly stressed, which causes the top cover assembly to easily collapse downward on the side where the tab is protruded, that is, the top cover assembly is unilaterally sunken, thereby reducing the energy density and service life of the battery pack. SUMMARY

[0005] Therefore, the utility model embodiment is dedicated to providing a top cover assembly, a battery and an electric equipment to solve the problem of unilateral sinking of the top cover assembly of the single cell lithium battery in the prior art.

[0006] In a first aspect, the utility model provides a top cover assembly, which comprises a cover plate and an insulating structure.

[0007] The insulating structure comprises a main body and a turnover body, the main body is connected to one side of the cover plate facing the cell, and the turnover body is rotatably connected to the long side of the main body close to the tab root of the cell.

[0008] The turnover body and the main body are provided with a supporting structure and an avoiding opening for the tab, and the supporting structure is arranged close to the rotating connection between the turnover body and the main body, so as to support the tab and the cover plate when the turnover body is rotated and clamped between the tab and the cell.

[0009] Optionally, the supporting structure comprises a first supporting part arranged on the turnover body and a second supporting part arranged on the main body.

[0010] The side of the first supporting part away from the turnover body is used for abutting against the side of the second supporting part away from the main body.

[0011] Optionally, the first support part is a first support protrusion, and the second support part is a second support protrusion, and the first support protrusion and the second support protrusion both extend along the length direction of the main body.

[0012] Optionally, one side of the first support part away from the turnover body is provided with a first limiting inclined surface, and one side of the second support part away from the main body is provided with a second limiting inclined surface, in a direction from the rotating connection between the turnover body and the main body to one end of the turnover body away from the rotating connection, the first limiting inclined surface is arranged to be inclined away from the turnover body, and in a direction from the rotating connection between the turnover body and the main body to one end of the main body away from the rotating connection, the second limiting inclined surface is arranged to be inclined towards the main body.

[0013] Optionally, the support structure is arranged at the rotating connection between the turnover body and the main body, and the first support part and the second support part are rotatably connected.

[0014] The support structure and the tab have an overlapping area in the length direction of the main body, and the avoiding opening is arranged on the support structure, or the support structure is located between the positive tab and the negative tab of the tab, and the turnover body is arranged to be spaced apart from the main body in an area outside the support structure to form the avoiding opening.

[0015] Optionally, the turnover body is provided with a first gap on a side wall close to the main body, and the main body is provided with a second gap on a side wall close to the turnover body, and the first gap and the second gap jointly enclose the avoiding opening.

[0016] Optionally, the turnover body is two, and the two turnover bodies are arranged to be spaced apart along the length direction of the main body, one rotating connection between one of the turnover bodies and the main body and the positive tab of the tab has an overlapping area in the length direction of the main body, and one rotating connection between the other turnover body and the main body and the negative tab of the tab has an overlapping area in the length direction of the main body, and the rotating connections between the two turnover bodies and the main body are both provided with the avoiding opening.

[0017] Optionally, the rotating connection between the turnover body and the main body is located between the positive tab and the negative tab of the tab, and the turnover body is arranged to be spaced apart from the main body in an area outside the rotating connection to form the avoiding opening.

[0018] In a second aspect, the utility model provides a kind of battery, including battery cell, cover plate and the top cover assembly as described above.

[0019] In a third aspect, the present invention provides an electrical device comprising the battery as described above.

[0020] The technical solution provided by the embodiment of the utility model has the following advantages compared with the prior art:

[0021] The present invention provides a top cover assembly, battery, and electrical device, comprising a cover plate and an insulating structure. The insulating structure comprises a main body and a flip body. The main body is connected to a surface of the cover plate facing the battery cell, and the flip body is rotatably connected to a long side of the main body near the base of the battery cell's tab, i.e., the flip body is rotatably connected to a long side of the main body near the side where the tab extends. Furthermore, a support structure and a clearance opening for the tab are provided between the flip body and the main body. The tab passes through the clearance opening and is arranged between the flip body and the main body to connect with a terminal post on the top cover assembly. The support structure is provided near the rotational connection between the flip body and the main body to support the tab and the cover plate when the flip body is sandwiched between the tab and the battery cell. With this arrangement, when the insulating structure is properly connected between the cover plate and the battery cell, the support structure, because it is provided near the rotational connection between the flip body and the main body, is also provided near the base of the tab, i.e., the side where the tab extends. Therefore, the support structure provides support between the main body and the flip body, positioning the tab within the support space of the support structure. Since the pole tab is connected to the pole post on the cover, the support structure forms an upward supporting force on the pole tab and the cover, especially near the extended position of the pole tab, thereby preventing the pole tab from pulling the cover downward, and thus to a certain extent avoiding the phenomenon of unilateral sinking of the cover on the extended side of the pole tab, so that the force on both sides of the cover is relatively uniform, which to a certain extent improves the energy density of the single-cell lithium battery and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an axonometric view of the insulation structure for a power battery according to one embodiment of the present utility model;

[0023] Figure 2 This is a side view of the insulation structure for a power battery according to one embodiment of the present utility model;

[0024] Figure 3 This is a diagram showing a state in which the flip body of the insulation structure for a power battery according to one embodiment of the present utility model is flipped to form a right angle with the main body;

[0025] Figure 4 This is a diagram showing a state in which the flip body of the insulation structure for a power battery according to one embodiment of the present utility model is flipped over to overlap with the main body;

[0026] Figure 5 This is an axonometric view of a flip body of the insulation structure for a power battery according to an embodiment of the present utility model;

[0027] Figure 6 The side view of the turnover body of the insulating structure for the power battery according to an embodiment of the utility model;

[0028] Figure 7 The isometric view of the main body of the insulating structure for the power battery according to an embodiment of the utility model;

[0029] Figure 8 The isometric view of the main body of the insulating structure for the power battery according to an embodiment of the utility model; Figure 7 The enlarged view of the A part in the figure;

[0030] Figure 9 The side view of the main body of the insulating structure for the power battery according to an embodiment of the utility model;

[0031] Figure 10 The partial expanded view of the power battery according to an embodiment of the utility model;

[0032] Figure 11 The isometric view of the main body of the insulating structure for the power battery according to an embodiment of the utility model; Figure 10 The enlarged view of the B part in the figure;

[0033] Figure 12 The partial structure schematic view of the power battery according to an embodiment of the utility model;

[0034] Figure 13 The partial structure sectional view of the power battery according to an embodiment of the utility model;

[0035] Figure 14 The isometric view of the main body of the insulating structure for the power battery according to an embodiment of the utility model; Figure 13 The enlarged view of the C part in the figure;

[0036] Figure 15 The explosion view of the power battery according to an embodiment of the utility model.

[0037] Wherein, 10, insulating structure;1, main body;2, turnover body;3, support structure;31, first support part;32, second support part;41, first limit inclined surface;42, second limit inclined surface;5, avoiding mouth;51, first gap;52, second gap;6, transition inclined surface;20, cover plate;30, electric core;301, pole lug;311, positive pole lug;321, negative pole lug;40, isolation layer;50, bottom support plate;60, shell;70, pole;701, positive pole;702, negative pole;80, upper plastic;90, explosion-proof valve;901, explosion-proof valve patch. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art based on the embodiments of the present application belong to the scope of protection of the present application.

[0039] As shown in Figures 1 to 15 The present embodiment provides a top cover assembly, which comprises a cover plate 20 and an insulation structure 10.

[0040] As shown in Figures 1 to 4 、 Figure 10 and Figure 11 The insulation structure 10 comprises a main body 1 and a turnover body 2, and the main body 1 is connected to one side of the cover plate 20 facing the battery cell 30. The side of the battery cell 30 facing the cover plate 20 protrudes with a tab 301, and the tab 301 is located between the main body 1 and the battery cell 30. The turnover body 2 is rotatably connected to the long side of the main body 1 near the root of the tab 301 (i.e. the bending part of the tab 301, which is also the part of the tab 301 protruding from one side of the battery cell 30). That is, the turnover body 2 is rotatably connected to the long side of the main body 1 and is connected to the long side of the main body 1 near the root of the tab 301.

[0041] The main body 1 is usually made of insulating material, such as plastic. The main body 1 is located between the cover plate and the battery cell 30, and the main body 1 plays an insulating isolation role between the cover plate and the battery cell 30. The cover plate is provided with a pole 70, and the main body 1 is provided with a avoiding opening at a position corresponding to the pole 70, and the pole 70 is electrically connected to the tab 301 through the avoiding opening.

[0042] The turnover body 2 is also usually made of insulating material, such as plastic. The turnover body 2 is located between the tab 301 and the battery cell 30, and the turnover body 2 plays an insulating isolation role between the tab 301 and the battery cell 30, and can avoid the phenomenon of the tab 301 being inserted into the battery cell 30.

[0043] It should be noted that the material of the turnover body 2 can be the same as that of the main body 1, of course, the material of the turnover body 2 can also be different from that of the main body 1.

[0044] The shape of the main body 1 matches the shape of the cover plate 20, the connection is convenient, and the insulating isolation effect is good. The main body 1 can be a rectangular structure matching the cover plate 20, and the main body 1 has two opposite long sides, i.e. the length sides of the main body 1; the main body 1 has two opposite short sides, i.e. the width sides of the main body.

[0045] In specific implementation, the flip body 2 is rotatably connected to the long side of the main body 1 close to the root of the pole ear 301. The flip body 2 is located between the pole ear 301 and the battery cell 30, and plays an insulating isolation role between the pole ear 301 and the battery cell 30, while preventing the pole ear 301 from being inserted upside down.

[0046] In some embodiments, a bending portion may be provided between the flip body 2 and the main body 1, and the flip body 2 may be bent along the bending portion toward the main body 1. The setting of the bending portion facilitates the flip body 2 to rotate to the side of the main body 1 away from the cover plate 20, and be stacked with the main body 1 to isolate the tab 301 and the battery cell 30.

[0047] In specific implementation, the bending portion can be, for example, a fold line, a folding groove, etc.

[0048] The thickness of the bent portion may be, for example, smaller than the thickness of the flip body 2 , and the thickness of the bent portion is smaller than the thickness of the main body 1 , which further facilitates the rotation of the flip body 2 .

[0049] refer to Figures 1 to 4 As shown, a support structure 3 and an avoidance opening 5 for the pole ear 301 to pass through are provided between the flip body 2 and the main body 1. The support structure 3 is provided near the rotation connection between the flip body 2 and the main body 1, that is, the support structure 3 is provided near the side where the root of the pole ear 301 is located, so that when the flip body 2 rotates to be clamped between the pole ear 301 and the battery cell 30, the support structure 3 supports the pole ear 301 and the cover plate 20. In this way, the support structure 3 forms a supporting force on the pole ear 301 and the cover plate 20, playing a supporting role, especially near the root of the pole ear 301, thereby avoiding the phenomenon of unilateral sinking of the cover plate 20 and the top cover assembly having the cover plate 20 to a certain extent, making the force on the cover plate 20 and the top cover assembly relatively uniform, which helps to extend the service life of the cover plate 20 and the top cover assembly having the cover plate 20.

[0050] In a specific implementation, the support structure 3 can be provided on the flip body 2, and close to the rotation connection between the flip body 2 and the main body 1. Of course, the support structure 3 can also be provided on the main body 1, and close to the rotation connection between the flip body 2 and the main body 1.

[0051] In other embodiments, the support structure 3 is provided at the rotational connection between the flip body 2 and the main body 1 , so that the support structure 3 has a better supporting effect on the root of the tab 301 .

[0052] The top cover assembly provided by the utility model, through setting the cover plate 20 and the insulating structure 10, the insulating structure 10 comprises a main body 1 and a turnover body 2, the main body 1 is connected on the side of the cover plate 20 facing the battery cell 30, and the turnover body 2 is rotatably connected on the long side of the main body 1 close to the root of the tab 301 of the battery cell 30, that is, the turnover body 2 is rotatably connected on the long side of the main body 1 close to the extending side of the tab 301. And the support structure 3 and the avoiding opening 5 for the tab 301 are arranged between the turnover body 2 and the main body 1, the tab 301 is arranged between the turnover body 2 and the main body 1 through the avoiding opening 5 to be connected with the pole on the top cover assembly. The support structure 3 is arranged close to the rotary connection between the turnover body 2 and the main body 1 to support the tab 301 and the cover plate 20 when the turnover body 2 is clamped between the tab 301 and the battery cell 30. When the insulating structure 10 is connected between the cover plate 20 and the battery cell 30, the support structure 3 is arranged close to the rotary connection between the turnover body 2 and the main body 1, so the support structure 3 is also arranged close to the root of the tab 301, that is, the extending side of the tab 301, and the support structure 3 plays a supporting role between the main body 1 and the turnover body 2, so that the tab 301 is located in the supporting space of the support structure 3. Since the tab 301 is connected with the pole on the cover plate 20, the support structure 3 forms an upward supporting force on the tab 301 and the cover plate 20, especially near the extending position of the tab 301, so that the tab 301 can avoid pulling down the cover plate 20, and the phenomenon of one-sided sinking of the cover plate 20 on the extending side of the tab 301 is avoided to a certain extent, so that the stress on both sides of the cover plate 20 is more uniform, the energy density of the single battery cell 30 is improved to a certain extent, and the service life is prolonged.

[0053] Reference Figures 1 to 9 As shown in some embodiments, the support structure 3 comprises a first support part 31 arranged on the turnover body 2 and a second support part 32 arranged on the main body 1. The side of the first support part 31 away from the turnover body 2 is used to abut against the side of the second support part 32 away from the main body 1.

[0054] That is, the support structure 3 comprises the first support part 31 and the second support part 32, the first support part 31 is arranged on the long side of the turnover body 2 close to the root of the tab 301, the second support part 32 is arranged on the long side of the main body 1 close to the root of the tab 301, and the first support part 31 and the second support part 32 have a connecting area, and the two form a foldable whole structure through the connecting area. The connecting area of the first support part 31 and the second support part 32 can be arranged away from the pole 70, for example.

[0055] When the turnover body 2 is stacked with the main body 1, the side of the first supporting part 31 away from the turnover body 2 abuts against the side of the second supporting part 32 away from the main body 1, and the first supporting part 31 and the second supporting part 32 are cooperatively supported between the turnover body 2 and the main body 1, and the tab 301 is located in the supporting space formed by the first supporting part 31 and the second supporting part 32. Since the tab 301 is connected together with the cover plate through the pole 70, the first supporting part 31 and the second supporting part 32 can form a supporting force on the tab 301 and the cover plate, thereby playing a supporting role, especially a good supporting effect on the root of the tab 301, avoiding the phenomenon of one-sided sinking of the cover plate, and making the stress on both sides of the cover plate more uniform.

[0056] The first supporting part 31 and the second supporting part 32 may, for example, be integrally formed, and may, for example, be connected together through a crease.

[0057] Reference Figures 2 to 4 As shown in some embodiments, the first supporting part 31 is a first supporting protrusion, and the second supporting part 32 is a second supporting protrusion, and the first supporting protrusion and the second supporting protrusion both extend along the length direction of the main body 1.

[0058] That is, the first supporting part 31 is a strip-shaped supporting protrusion extending along the length direction of the main body 1, and the second supporting part 32 is a strip-shaped supporting protrusion extending along the length direction of the main body 1. Such an arrangement further improves the supporting effect of the first supporting part 31 and the second supporting part 32, further avoids the phenomenon of one-sided sinking of the cover plate, and makes the stress on both sides of the cover plate more uniform.

[0059] It should be noted that the length direction of the turnover body 2 is consistent with the length direction of the main body 1. The width direction of the turnover body 2 is consistent with the width direction of the main body 1.

[0060] In other embodiments, the first supporting part 31 may, for example, include a plurality of first supporting columns arranged at intervals along the length direction of the turnover body 2. Correspondingly, the second supporting part 32 may, for example, include a plurality of second supporting columns arranged at intervals along the length direction of the main body 1, and the second supporting columns are arranged one-to-one with the first supporting columns.

[0061] Reference Figures 2 to 6 As shown in some embodiments, the side of the first supporting part 31 away from the turnover body 2 is provided with a first limiting inclined surface 41. Reference Figure 2 、 Figure 3 、 Figures 7 to 9As shown, the side of the second support part 32 away from the main body 1 is provided with a second limiting inclined surface 42, in the direction from the rotating connection between the turnover body 2 and the main body 1 to the end of the turnover body 2 away from the rotating connection, the first limiting inclined surface 41 is inclinedly arranged in the direction away from the turnover body 2, and in the direction from the rotating connection between the turnover body 2 and the main body 1 to the end of the main body 1 away from the rotating connection, the second limiting inclined surface 42 is arranged in the direction close to the main body 1, which is simple in structure, easy to manufacture, and good in supporting effect.

[0062] That is, in the direction from the rotating connection between the turnover body 2 and the main body 1 to the end of the turnover body 2 away from the rotating connection, the thickness of the first support part 31 gradually increases; in the direction from the rotating connection between the turnover body 2 and the main body 1 to the end of the main body 1 away from the rotating connection, the thickness of the second support part 32 gradually decreases, when the turnover body 2 and the main body 1 are stacked, the first limiting inclined surface 41 and the second limiting inclined surface 42 abut, so that the first support part 31 and the second support part 32 not only are connected but also have flexible rotating space, which not only can realize the rotating connection between the turnover body 2 and the main body 1, but also has a good supporting effect on the tab 301 and the cover plate 20.

[0063] Reference Figure 13 and Figure 14 As shown, after the core is combined into the shell, the turnover body 2 and the main body 1 are stacked, the first limiting inclined surface 41 and the second limiting inclined surface 42 abut, so that the first support part 31 and the second support part 32 generate interaction forces F1 and F2, and the component F x1 of F1 in the X direction and the component F x2 of F2 in the X direction balance each other, and the component F y1 of F1 in the Y direction and the component F y2 of F2 in the Y direction balance each other, so that the turnover body 2 is in a relatively stable state, and compared with the scheme that the turnover body and the main body are connected by buckling in the prior art, a larger space is reserved for the tab 301, and the phenomenon of interference with the tab 301 is avoided.

[0064] In addition, when the first support part 31 and the second support part 32 cooperate, the first limiting inclined surface 41 and the second limiting inclined surface 42 abut, and also play a stabilizing role on the tab 301, to a certain extent, avoiding the phenomenon that the tab does not conform to the design state.

[0065] Moreover, due to the abutment of the first limiting inclined surface 41 and the second limiting inclined surface 42, the stress of the entire turnover body 2 is balanced through the interaction of the first limiting inclined surface 41 and the second limiting inclined surface 42, so that the turnover body 2 is in a relatively stable state. Figure 13As shown, if the free end of the tab 301 (i.e. the end of the tab 301 opposite to the tab root) is subjected to a downward force F4, an upward force F3 will counterbalance it, thereby avoiding the phenomenon of the top cover assembly on the side of the free end of the tab 301 sinking to a certain extent, prolonging the service life of the top cover assembly.

[0066] In some implementations, the first limiting slope 41 may be a limiting slope with an inclination angle of 45°, and the second limiting slope may also be a limiting slope with an inclination angle of 45°.

[0067] Reference Figures 1 to 4 , Figures 10 to 14 As shown, in some embodiments, the support structure 3 is arranged at the rotary connection between the flip body 2 and the main body 1, and the first support part 31 and the second support part 32 are rotatably connected; the support structure 3 has an overlapping area with the tab 301 in the length direction of the main body 1, and the avoiding opening 5 is arranged on the support structure 3.

[0068] That is, the support structure 3 is arranged at the rotary connection between the flip body 2 and the main body 1, and in the length direction of the main body 1, the support structure 3 has an overlapping area with the tab 301, and the avoiding opening 5 is arranged on the support structure 3. Exemplarily, referring to Figure 5 and Figure 8 As shown, the first support part 31 is provided with a first notch 51 at a position corresponding to the tab 301, and the second support part 32 is provided with a second notch 52 at a position corresponding to the tab 301, and the first notch 51 and the second notch 52 jointly form the avoiding opening 5, which is simple in structure and facilitates the tab 301 to be arranged.

[0069] Of course, the avoiding opening 5 can also be arranged only on the first support part 31, or the avoiding opening 5 can also be arranged only on the second support part 32.

[0070] In specific implementation, referring to Figure 10 and Figure 15 As shown, the tab 301 generally includes a positive tab 311 and a negative tab 321, and the positive tab 311 and the negative tab 321 are arranged at intervals in the length direction of the battery cell 30. The post 70 generally includes a positive post 701 and a negative post 702. The positive post 701 is connected with the positive tab 311, and the negative post 702 is connected with the negative tab 321.

[0071] In some embodiments, the support structure 3 is provided at the pivotal connection between the flip body 2 and the main body 1, with the first support portion 31 and the second support portion 32 pivotally connected. The support structure 3 is located between the positive tab 311 and the negative tab 321 of the tab 301, that is, the pivotal connection between the flip body 2 and the main body 1 is located between the positive tab 311 and the negative tab 321. The flip body 2 is spaced apart from the main body 1 in the area outside the support structure 3 to form a clearance 5. This arrangement allows the positive tab 311 and the negative tab 321 to share a single flip body 2, facilitating assembly.

[0072] In some embodiments, reference Figure 5 As shown, the flip body 2 is provided with a first notch 51 on the side wall close to the main body 1. Figure 7 and Figure 8 As shown, the main body 1 is provided with a second notch 52 on the side wall close to the flip body 2 , and the first notch 51 and the second notch 52 together form an escape opening 5 , which has a simple structure and is easy to assemble.

[0073] In some embodiments, reference Figure 5 and Figure 6 As shown, a transition slope 6 is provided on the side of the free end of the flip body 2 facing the main body 1, that is, a transition slope 6 is provided on the end of the flip body 2 away from the rotating connection, and in the direction along the rotating connection between the flip body 2 and the main body 1 to the free end of the flip body 2, the transition slope 6 is inclined toward the direction close to the flip body 2. The provision of the transition slope 6 can avoid the tab 301 from being folded during the assembly process, and can reduce interference and wear on the tab 301, which helps to improve the performance and service life of the battery.

[0074] refer to Figure 1 and Figure 10 As shown, in some embodiments, there are two flip bodies 2, and the two flip bodies 2 are spaced apart along the length direction of the main body 1, wherein the rotational connection between one flip body 2 and the main body 1 and the positive pole ear 311 of the pole ear 301 have an overlapping area in the length direction of the main body 1, wherein the connection between the other flip body 2 and the main body 1 and the negative pole ear 321 of the pole ear 301 have an overlapping area in the length direction of the main body 1, and the rotational connection between the two flip bodies 2 and the main body 1 are both provided with an avoidance opening 5, one flip body 2 is used to isolate the positive pole ear 311 from the battery cell 30, and the other flip body 2 is used to isolate the negative pole ear 321 from the battery cell 30, which is flexible to use. Setting two flip bodies 2 at the same time can absorb assembly errors to a certain extent, reduce assembly accuracy, and help improve assembly yield.

[0075] In some embodiments, the rotational connection between the flip body 2 and the main body 1 is located between the positive electrode ear 311 and the negative electrode ear 321 of the electrode ear 301, and the flip body 2 is spaced apart from the main body 1 in the area outside the rotational connection to form a avoidance opening 5. In this way, the positive electrode ear 311 and the negative electrode ear 321 can share one flip body 2, which is convenient for assembly.

[0076] refer to Figure 15 As shown, this embodiment further provides a battery, which includes a battery cell 30 and a top cover assembly.

[0077] The battery also includes an isolation layer 40, a bottom support plate 50, a housing 60, an upper plastic 80, an explosion-proof valve 90, and an explosion-proof valve patch 901. The isolation layer 40 covers the outer wall of the battery cell 30. The housing 60 is a hollow structure with one end open. The bottom support plate 50 is connected to the inner bottom wall of the housing 60. The battery cell 30, covered with the isolation layer 40, is installed within the housing 60 and contacts the bottom support plate 50. The bottom support plate 50 isolates and supports the battery cell 30. The top cover assembly is installed at the open end of the housing 60, sealing the interior of the housing 60.

[0078] The isolation layer 40 may be, for example, a polyester film, which has good insulation properties.

[0079] The top cover assembly is provided with a mounting hole, the pole 70 is passed through the mounting hole, the upper plastic 80 is surrounded by the outer wall of the pole 70 , and at least part of the upper plastic 80 is located between the hole wall of the mounting hole and the pole 70 .

[0080] An explosion-proof hole is also provided on the top cover assembly. An explosion-proof valve 90 is installed in the explosion-proof hole. An explosion-proof valve patch 901 is provided on the side of the explosion-proof hole that is away from the battery cell 30 .

[0081] The top cover assembly in this embodiment has the same structure and implementation principle as the top cover assembly provided in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here. Please refer to the description of the above embodiment for details.

[0082] This embodiment also provides an electrical device, which includes a battery.

[0083] In specific implementation, electrical equipment may be, for example, vehicles, mobile phones, spacecraft, electric toys, and electric tools.

[0084] Among them, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.

[0085] The battery in this embodiment has the same structure and implementation principle as the battery provided in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here. For details, please refer to the description of the above embodiment.

[0086] In this document, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0087] In this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A top cover assembly, characterized in that: It includes a cover plate (20) and an insulating structure (10); The insulating structure (10) comprises a main body (1) and a flip body (2), wherein the main body (1) is connected to a surface of the cover plate (20) facing the battery cell (30), and the flip body (2) is rotatably connected to a long side of the main body (1) on a side close to the root of the tab (301) of the battery cell (30); A support structure (3) and an escape opening (5) for the tab (301) to pass through are provided between the flip body (2) and the main body (1); the support structure (3) is provided near the rotation connection between the flip body (2) and the main body (1) so as to support the tab (301) and the cover plate (20) when the flip body (2) rotates to be sandwiched between the tab (301) and the battery cell (30).

2. The top cover assembly according to claim 1, wherein: The support structure (3) comprises a first support portion (31) provided on the flip body (2) and a second support portion (32) provided on the main body (1); The side of the first supporting portion (31) facing away from the flip body (2) is used to abut against the side of the second supporting portion (32) facing away from the main body (1).

3. The top cover assembly according to claim 2, wherein: The first supporting portion (31) is a first supporting protrusion, and the second supporting portion (32) is a second supporting protrusion. Both the first supporting protrusion and the second supporting protrusion extend along the length direction of the main body (1).

4. The top cover assembly according to claim 2, wherein: A first limiting inclined surface (41) is provided on a side of the first supporting portion (31) facing away from the flip body (2), and a second limiting inclined surface (42) is provided on a side of the second supporting portion (32) facing away from the main body (1). In a direction from the rotational connection between the flip body (2) and the main body (1) to an end of the flip body (2) facing away from the rotational connection, the first limiting inclined surface (41) is inclined in a direction away from the flip body (2), and in a direction from the rotational connection between the flip body (2) and the main body (1) to an end of the main body (1) facing away from the rotational connection, the second limiting inclined surface (42) is provided in a direction close to the main body (1).

5. The top cover assembly according to any one of claims 2 to 4, characterized in that: The support structure (3) is arranged at the rotation connection between the flip body (2) and the main body (1), and the first support portion (31) and the second support portion (32) are rotationally connected; The support structure (3) and the pole lug (301) have an overlapping area in the longitudinal direction of the main body (1), and the avoidance opening (5) is arranged on the support structure (3); or, the support structure (3) is located between the positive pole lug (311) and the negative pole lug (321) of the pole lug (301), and the flip body (2) is spaced apart from the main body (1) in an area outside the support structure (3) to form the avoidance opening (5).

6. The top cover assembly according to any one of claims 1 to 4, characterized in that: The flip body (2) is provided with a first notch (51) on a side wall close to the main body (1), and the main body (1) is provided with a second notch (52) on a side wall close to the flip body (2); the first notch (51) and the second notch (52) together enclose the avoidance opening (5).

7. The top cover assembly according to any one of claims 1 to 4, characterized in that: There are two flip bodies (2), and the two flip bodies (2) are spaced apart along the length direction of the main body (1). The rotation connection between one of the flip bodies (2) and the main body (1) and the positive pole ear (311) of the pole ear (301) have an overlapping area in the length direction of the main body (1), and the connection between the other flip body (2) and the main body (1) and the negative pole ear (321) of the pole ear (301) have an overlapping area in the length direction of the main body (1). The rotation connection between the two flip bodies (2) and the main body (1) is provided with the avoidance opening (5).

8. The top cover assembly according to any one of claims 1 to 4, characterized in that: The rotational connection between the flip body (2) and the main body (1) is located between the positive electrode ear (311) and the negative electrode ear (321) of the electrode ear (301), and the flip body (2) is spaced apart from the main body (1) in an area outside the rotational connection to form the avoidance opening (5).

9. A battery, characterized in that: It comprises a battery cell (30), a cover plate (20), and a top cover assembly according to any one of claims 1 to 8.

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

Images