Battery monomer and electric equipment

Abstract

The invention provides a battery monomer and electric equipment, the battery monomer comprises an end cover, a battery cell, a mainboard and a rotating plate, the battery cell comprises a tab and a main body, and the tab is led out from a first end face of the main body; the main plate and the rotating plate are positioned between the end cover and the first end surface of the main body; the mainboard is connected to one side, facing the battery core, of the end cover; the rotating plate is located between the tab and the main body, the rotating plate is rotatably connected to the main plate around the first axis, and the first axis is perpendicular to the main plate, so that the rotating plate rotates around the rotating axis until the tab is covered, and the rotating plate is located between the tab and the battery cell main body after being assembled into the shell; and the position of the rotating plate between the tab and the main body is relatively stable in the Z direction, so that the tab is stably supported, the tab and the main body of the battery cell are effectively separated, and the phenomenon of short circuit of the battery caused by the fact that the tab is inserted into the battery cell after entering a shell is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery cell and an electrical device. Background Art

[0002] At present, a battery cell generally includes a top cover, an aluminum shell and a battery cell. When the battery cell is assembled with the top cover, the battery cell needs to be flipped 90 degrees, and there is a process of folding the pole ear. When the pole ear is too long or the angle of folding the pole ear is incorrect, the pole ear is easily inserted into the battery cell after entering the shell, thereby causing a short circuit in the battery. Summary of the invention

[0003] In view of this, the embodiments of the present invention are dedicated to providing a battery cell and an electrical device to solve the problem in the prior art that the tab is easily inserted into the battery cell after being inserted into the shell, causing a battery short circuit.

[0004] In a first aspect, the present invention provides a battery cell, comprising:

[0005] End caps;

[0006] The battery cell comprises a tab and a main body, wherein the tab is led out from a first end surface of the main body;

[0007] The main board and the rotating plate are located between the end cover and the first end face of the main body; the main board is connected to the side of the end cover facing the battery cell; the rotating plate is located between the pole ear and the main body, and the rotating plate is rotatably connected to the main board around a first axis, and the first axis is perpendicular to the main board.

[0008] Optionally, a first rotating part is provided on the main board, a second rotating part is provided on the rotating plate, and the rotating plate is connected to the main board in a manner of rotational cooperation between the first rotating part and the second rotating part.

[0009] Optionally, the first rotating part includes a ball groove opening toward the rotating plate, and the second rotating part includes a ball head, which is rotatably accommodated in the ball groove around a first axis and is limited in the ball groove by the opening of the ball groove.

[0010] Optionally, the pole ear includes a bending portion, and a support member is provided on the side of the main board facing the rotating plate, one end of the support member is connected to the main board, and the other end of the support member is against the first end surface of the main body; in the width direction of the main board, the bending portion and the support member are arranged relative to each other.

[0011] Optionally, in the width direction of the main board, a side of the support member facing the bending portion and a side of the rotating plate facing away from the bending portion abut against each other.

[0012] Optionally, the support member has a limiting groove on a side facing the bending portion, and the rotating plate is inserted into the limiting groove on a side facing away from the bending portion.

[0013] Optionally, a first clamping portion is provided on a side of the main board facing the rotating plate, a second clamping portion is provided on the rotating plate, and the rotating plate is connected to the main board by clamping the first clamping portion and the second clamping portion.

[0014] Optionally, a first clamping portion is provided on a side of the support member facing the bending portion, and a second clamping portion engaged with the first clamping portion is provided on a side of the rotating plate away from the bending portion, wherein one of the first clamping portion and the second clamping portion is a clamping protrusion and the other is a clamping hole.

[0015] Optionally, there are two pole lugs and two rotating plates, and the two rotating plates and the two pole lugs are arranged at intervals along the length direction of the main board, and the rotating plates and the pole lugs correspond one to one.

[0016] In a second aspect, the present invention provides an electrical device comprising the battery cell described above.

[0017] The battery cell and electrical equipment provided by the present invention can bend the pole ear of the battery cell around the rotating plate by setting a rotating plate, which solidifies the bent shape of the pole ear and prevents the pole ear from being inserted upside down into the main body of the battery cell. In addition, since the rotating plate can rotate around the first axis perpendicular to the main board, on the one hand, the rotating plate and the pole ear are easy to assemble, that is, it is only necessary to control the rotating plate to rotate around the first axis to achieve the covering of the pole ear by the rotating plate. On the other hand, one end of the rotating plate is connected to the rotating plate by rotating around the first axis perpendicular to the main board. Therefore, in the Z direction, the distance between the rotating plate and the main body is always unchanged, and the support for the pole ear is also stable, that is, it is only necessary to control the rotating plate to rotate around the first axis to ensure the support of the rotating plate to the pole ear, thereby ensuring the production rhythm and yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded view of a battery cell according to an embodiment of the present invention;

[0019] Figure 2 An assembly diagram of a battery cell according to an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the connection between the main board and the rotating board of a battery cell according to an embodiment of the present invention;

[0021] Figure 4 for Figure 3 Sectional view of AA in the middle;

[0022] Figure 5 A schematic structural diagram of a first rotating part of a battery cell according to an embodiment of the present invention;

[0023] Figure 6 for Figure 3 Cross-sectional view of the middle BB;

[0024] Figure 7 for Figure 3 Cross-sectional view of CC;

[0025] Figure 8 A schematic diagram of the coordination between the main board and the battery cell of a battery cell according to an embodiment of the present invention;

[0026] Fig. 9 An isometric view of a rotating plate of a battery cell according to an embodiment of the present invention;

[0027] Fig.10 It is a schematic structural diagram of a rotating plate of a battery cell according to an embodiment of the present invention;

[0028] Fig.11 for Fig.10 Cross-sectional view of DD.

[0029] Among them, 1. end cover; 11. pole; 2. battery cell; 21. pole ear; 201. bending part; 22. main body; 3. main board; 31. first rotating part; 32. first clamping part; 33. avoidance hole; 4. rotating plate; 41. second rotating part; 42. notch; 43. second clamping part; 5. first support column; 51. clamping strip; 6. support member; 61. limit groove; 7. second support column; 81. explosion-proof valve; 82. explosion-proof valve patch; 83. insulating member; 84. insulating film; 85. bottom support plate; 86. shell. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the related art, a battery cell includes a shell, a battery cell, an end cover and an insulating plate. The shell is a cavity structure with one end open, the battery cell is installed in the shell, and the end cover is installed at the open end of the shell, so that the end cover seals the open end of the shell. A pole is installed on the end cover, and a pole ear extends from the end face of the battery cell. The insulating plate is located between the end cover and the battery cell, and plays an insulating isolation role between the end cover and the battery cell.

[0032] The inventors of the present application have discovered that since the battery cell's tabs and the poles on the end caps are flipped 90° after assembly, there is a process of folding the tabs. When the tabs are too long or the angle of folding the tabs is incorrect, the tabs are easily inserted backwards into the battery cell after entering the shell, causing a short circuit in the battery.

[0033] Therefore, in order to solve the problem that the existing middle tab is easily inserted into the battery cell after being inserted into the shell, causing a short circuit in the battery, refer to Figures 1 to 11 As shown, this embodiment provides a battery cell, which includes a shell 86, an end cover 1, a battery cell 2, a main board 3 and a rotating plate 4.

[0034] Among them, reference Figure 1 , Figure 2 and Figure 8 As shown, the shell 86 is a cavity structure with one end open. The end cover 1 seals the opening of the shell 86 and is connected to the shell 86, and a receiving cavity is constructed between the shell 86 and the end cover 1. A battery cell 2 is arranged in the receiving cavity, and the battery cell 2 includes a pole ear 21 and a main body 22, and the pole ear 21 is led out from the first end face of the main body 22. A mounting hole is provided on the end cover 1, and the pole 11 is inserted into the mounting hole. The pole 11 is used to connect with the pole ear 21 to realize the charging and discharging of the battery cell, wherein, in order to insulate the pole 11 and the end cover 1, the insulating member 83 is arranged on the outer wall of the pole 11, and at least part of the insulating member 83 is located between the hole wall of the mounting hole and the pole 11. An explosion-proof hole is also provided on the end cover 1, and the explosion-proof valve 81 is installed in the explosion-proof hole, and the explosion-proof valve patch 82 is covered on the side of the explosion-proof hole away from the battery cell.

[0035] Specifically, in order to solve the problem that the existing middle tab is easily inserted into the battery cell after being inserted into the shell, causing a short circuit in the battery, refer to Figure 1 , Figure 2 As shown, the main board 3 and the rotating plate 4 are both located between the end cap 1 and the first end surface of the main body 22. The main board 3 is connected to the side of the end cap 1 facing the battery cell 2, and the rotating plate 4 is located between the pole ear 21 and the main body 22, that is, in the direction from the main board 3 to the main body 22 (reference Figure 1 , Figure 2 and Figure 6 In the Z direction from top to bottom), the tab 21, the rotating plate 4, and the main body 22 are stacked in sequence, and the rotating plate 4 can rotate around the first axis (reference Figure 6 and Figure 8 The axis M) in the middle is rotatably connected to the main board 3, and the first axis is perpendicular to the main board 3.

[0036] In this embodiment, the rotating plate 4 is rotatably connected to the side of the main board 3 facing the battery cell 2, and the rotating axis of the rotating plate 4 is perpendicular to the main board 3. In this way, the rotating plate 4 is rotated around the rotating axis until the pole ear 21 is covered. After being assembled into the shell, the rotating plate 4 is located between the pole ear 21 and the main body 22, thereby solidifying the bending shape of the pole ear and preventing the pole ear from being inserted backwards into the main body of the battery cell. At the same time, since the position of the rotating plate 4 between the pole ear 21 and the main body 22 is relatively stable, a stable support is formed for the pole ear 21, and the pole ear 21 and the main body 22 are effectively isolated, thereby avoiding the phenomenon of the pole ear 21 being inserted into the interior of the battery cell 2 after being inserted into the shell to cause a battery short circuit.

[0037] In addition, since the rotating plate 4 can be controlled to rotate around the first axis to cover the pole ear 21, the rotating plate 4 and the pole ear 21 are easy to assemble, and since one end of the rotating plate 4 is connected to the main board 3 by rotating around the first axis perpendicular to the main board 3, the distance between the rotating plate 4 and the main board 3 in the Z direction will not change during the rotation of the rotating plate 4, that is, the relative distance between the rotating plate 4 and the main board 3 remains unchanged, so that the rotating plate 4 is in the Z direction (reference Figure 1 , Figure 2 and Figure 6 The structure in the Z direction) is relatively stable. In this way, as long as the rotating plate 4 is controlled to rotate around the rotating axis to between the pole ear 21 and the battery cell 2, the installation of the rotating plate 4 supporting the pole ear 21 is completed to ensure the production rhythm and yield rate.

[0038] It should be noted that, in this embodiment, the main board 3 and the rotating board 4 are both made of insulating materials, such as polycarbonate, polyoxymethylene, polyurethane, etc.

[0039] It should also be noted that the reference Figure 1 , Figure 2 and Figure 8 As shown, the main board 3 plays an insulating role between the end cover 1 and the battery cell 2. A avoidance hole 33 is opened at the position of the main board 3 corresponding to the pole 11, and the pole 11 passes through the avoidance hole 33 and is connected to the pole lug 21. Among them, the pole 11 can be directly connected to the pole lug 21, and of course, the pole 11 can also be connected to the pole lug 21 through an adapter.

[0040] For specific implementation, refer to Figure 1 As shown, the positive pole post and the negative pole post, the positive ear and the negative ear, a avoidance hole is opened at the position corresponding to the positive pole post on the main board 3, and a avoidance hole is also opened at the position corresponding to the negative pole post on the main board 3. Specifically, the positive pole post passes through the corresponding avoidance hole on the main board 3 to be connected to the positive ear, and the negative pole post passes through the corresponding avoidance hole on the main board 3 to be connected to the negative ear.

[0041] In some embodiments, reference Figure 4 , Figure 6 , Figure 8 , Fig. 9 and Fig.11 As shown, the main board 3 is provided with a first rotating portion 31 , the rotating plate 4 is provided with a second rotating portion 41 , and the rotating plate 4 is connected to the main board 3 by means of the first rotating portion 31 and the second rotating portion 41 rotatingly cooperating with each other.

[0042] By setting a first rotating part 31 on the main board 3 and a second rotating part 41 on the rotating plate 4, the first rotating part 31 and the second rotating part 41 are cooperatively connected, and the second rotating part 41 can rotate relative to the first rotating part 31, so that the rotating plate 4 can be rotatably connected to the main board 3 and the rotating plate 4 can rotate stably relative to the main board 3.

[0043] For specific implementation, refer to Figure 8 As shown, in the length direction of the main board 3, the first rotating portion 31 is arranged at the end of the main board 3, and in the width direction of the main board 3, the first rotating portion 31 is located in the middle position of the main board 3, which is convenient for the assembly and rotation of the rotating plate 4.

[0044] Continue and refer to Figure 4 and Figure 6 As shown, the first rotating part 31 includes a ball groove with an opening toward the rotating plate 4, and the second rotating part 41 includes a ball head, which is rotatably accommodated in the ball groove around the first axis and is limited in the ball groove by the opening of the ball groove. The structure is simple, easy to manufacture, convenient and reliable to connect, and it is convenient for the rotating plate 4 to rotate. Of course, in other embodiments, the first rotating part can be a ball head provided on the main board 3, and the second rotating part can be a ball groove provided on the rotating plate 4.

[0045] Further, refer to Figure 6 and Figure 8 As shown, a first support column 5 may be provided on the side of the main board 3 facing the rotating plate 4, and the first support column 5 extends toward the rotating plate 4, and a ball groove may be provided on the end face of the first support column 5 that is away from the main board, and the first support column 5 has a certain extension dimension relative to the main board 3 in the Z direction, thereby increasing the relative distance between the rotating plate 4 and the main board 3 in the Z direction to a certain extent, so that the tab 21 can be accommodated between the main board 3 and the rotating plate 4, and the rotating plate 4 is prevented from interfering with the tab 21. In addition, by providing the ball groove on the first support column 5, the phenomenon of affecting the strength of the main board 3 due to the formation of the ball groove by slotting on the main board 3 can be avoided, and the structural strength and reliability of the main board 3 are enhanced to a certain extent.

[0046] Further, refer to Figure 5As shown, in order to prevent the ball head from being easily dislodged after being placed in the ball groove and to allow the ball head to rotate around the first axis, the cross-sectional contour line of the ball groove is designed to be an arc shape, and the first support column 5 is designed to have a groove, and the bottom of the groove is provided with a plurality of clips 51 that enclose the ball groove. The plurality of clips 51 are arranged at equal intervals along the circumferential direction, and a gap is reserved between each clip 51 and the groove for deformation of the clip 51. When the first rotating part 31 and the second rotating part 41 are assembled, the ball head will first open the clip 51 when entering from the notch of the ball groove, and the clip 51 will be reset when the ball head and the ball groove are assembled in place.

[0047] It should be noted that in order to allow the ball head to rotate only around the first axis, it can be designed that after the ball head and the ball groove are assembled in place, the rotating plate and the first support column 5 are abutted in the Z direction; in addition, in order to facilitate the second rotating part 41 to enter the groove of the ball groove for fried rice cakes surrounded by multiple clips 51, the inner side surface of the end of the clip 51 away from the bottom of the groove is designed to be set as an inclined surface.

[0048] It should also be noted that, for the convenience of processing, the first support column 5 can be integrally formed with the main board 3, and the ball head can be integrally formed with the rotating plate 4, with good integrity and high structural strength. Of course, in other implementations, the first support column 5 can also be connected to the main board 3 by hot melt welding or by structural adhesive bonding or by bolts or other detachable methods, and the ball head can also be connected to the rotating plate 4 by hot melt welding or by structural adhesive bonding or by bolts or other detachable methods.

[0049] In some embodiments, reference Figure 2 and Figure 8 As shown, the pole ear 21 includes a bent portion 201, and the bent portion 201 is located at one end of the pole ear 21 extending from the first end surface. A support member 6 is provided on the side of the main board 3 facing the rotating plate 4, one end of the support member 6 is connected to the main board 3, and the other end of the support member 6 is against the first end surface of the main body 22; in the width direction of the main board 3 (refer to 2 and Figure 8 In the X direction), the bending portion 201 and the support member 6 are arranged opposite to each other.

[0050] That is, the side of the main board 3 facing the rotating plate 4 is provided with a support member 6, the support member 6 is relatively fixed to the main board 3, and the end surface of the support member 6 facing away from the main board 3 is in contact with the main body 22, Figure 2 As shown, one end of the mainboard 3 in the width direction is supported on the bending portion 201, and the other end of the mainboard 3 in the width direction is supported on the support member 6. In other words, one end of the end cover 1 in the width direction is supported on the bending portion 201, and the other end of the end cover 1 in the width direction is supported on the support member 6, thereby avoiding the end cover 1 from sinking on the side of the battery cell 2 where there is no bending portion 201, making the structure of the end cover 1 more stable and helping to extend the service life of the end cover 1.

[0051] In addition, since the support member 6 and the bending portion 201 are arranged on both sides in the width direction of the main board 3, and the support member 6 can abut against the first end surface of the main body 22 of the battery cell, in the Z direction, the thickness of the support member 6 is greater than the distance between the rotating plate 4 and the main board 3. Since only one end of the rotating plate 4 is connected to the main board 3, the other end of the rotating plate 4 is free and unconstrained. Therefore, when the rotating plate 4 rotates from the side of the main board without the pole ear, it can be ensured that the rotating plate 4 passes over the support member 6 and rotates between the main board 3 and the first end surface of the main body 22.

[0052] It should be noted that, in the width direction of the main board 3, the bending portion 201 and the support member 6 are arranged relatively to each other. It can be understood that, in the width direction of the main board 3, the bending portion 201 and the support member 6 are arranged opposite to each other. It can also be understood that the bending portion 201 and the support member 6 are arranged relatively to each other in the width direction of the main board 3 and staggered in the length direction of the main board 3. That is to say, as long as the bending portion 201 and the support member 6 are arranged on both sides of the center line in the width direction of the main board 3, such a layout is reasonable, the two will not interfere with each other, and it is more practical.

[0053] It should also be noted that the support member 6 can be a support boss. Figure 8 As shown, the support member 6 can extend along the length direction of the main board 3 to form a strip-shaped support boss.

[0054] In some embodiments, reference Figure 2 , Figure 3 and Figure 7 As shown, in the width direction of the main board 3 , the side of the support member 6 facing the bending portion 201 and the side of the rotating plate 4 facing away from the bending portion 201 abut against each other.

[0055] By abutting the support member 6 against the rotating plate 4 , the support member 6 has a stopping effect on the rotating plate 4 during the assembly process, which can prevent the rotating plate 4 from rotating excessively, and help improve the assembly accuracy.

[0056] In some embodiments, reference Figure 8 As shown, the side of the support member 6 facing the bending portion 201 has a limiting groove 61, and the side of the rotating plate 4 away from the bending portion 201 is inserted into the limiting groove 61. Of course, in some other embodiments, the side of the support member facing the bending portion can be provided with a limiting protrusion, and the side of the rotating plate away from the bending portion can be provided with a limiting groove.

[0057] By setting a limiting groove 61 on the support member 6, the side of the rotating plate 4 away from the bending portion 201 is inserted into the limiting groove 61. On the one hand, the support member 6 is ensured to stop and limit the rotating plate 4; on the other hand, Figure 2As shown, the bending portion 201 exerts a downward force on the side of the rotating plate 4 close to the bending portion 201 (refer to Figure 2 The transmission of force causes the rotating plate 4 to be subjected to force on the side away from the bending portion 201 (refer to Figure 2 F1' in the figure, so that the side of the rotating plate 4 away from the bending portion 201 will be lifted up, and when the limiting groove 61 cooperates with the edge of the rotating plate away from the bending portion 201, the side of the rotating plate 4 away from the bending portion 201 is restricted by the support member and the end cover 1 is prevented from lifting up (refer to Figure 2 F2 in the figure further improves the structural stability of the rotating plate 4 in the Z direction.

[0058] In some embodiments, reference Figure 3 , Figures 8 to 10 As shown, a first engaging portion 32 is provided on the side of the main board 3 facing the rotating board 4, and the position of the first engaging portion 32 on the main board 3 is opposite to the bending portion 201. In other words, the first engaging portion 32 and the support member 6 are located on the same side. A second engaging portion 43 is provided on the rotating board 4, and the second engaging portion 43 is located on the side of the rotating board 4 away from the bending portion 201. The rotating board 4 is connected to the main board 3 by means of the first engaging portion 32 and the second engaging portion 43 being engaged with each other.

[0059] By setting a first locking portion 32 on the main board 3 and a second locking portion 43 on the rotating plate 4, and when the side of the rotating plate 4 facing away from the bending portion 201 is inserted into the limiting groove 61, the first locking portion 32 and the second locking portion 43 are locked and connected, so that when the rotating plate 4 is rotated into place relative to the main board 3, the rotating plate 4 can be kept relatively fixed with the main board 3 through the first locking portion 32 and the second locking portion 43, thereby further enhancing the structural stability of the rotating plate 4, especially making the rotating plate 4 more stable in the Z direction.

[0060] In specific implementation, the second clamping portion 43 and the first rotating portion 31 are arranged on both sides of the pole ear 21 along the length direction of the main board 3, so that the rotating plate 4 is rotatably connected to the main board 3 through the first rotating portion 31, and the rotating plate 4 is relatively fixed to the main board through the second clamping portion 43, and there will be no interference between the two.

[0061] Specifically in this embodiment, refer to Figure 8 As shown, a first engaging portion 32 is provided on the side of the support member 6 facing the bending portion 201, and a second engaging portion 43 engaged with the first engaging portion 32 is provided on the side of the rotating plate 4 away from the bending portion 201, wherein one of the first engaging portion 32 and the second engaging portion 43 is a engaging protrusion and the other is a engaging hole, which results in simplicity, easy manufacture, convenient and stable connection.

[0062] It should be noted that the reference Figures 8 to 10As shown, the first engaging portion 32 may be a protrusion disposed on the mainboard 3, and the second engaging portion 43 may be a hole for the protrusion to extend into. Of course, in other embodiments, the first engaging portion may be a hole, and the second engaging portion may be a protrusion.

[0063] In a specific implementation, the card hole can be set, for example, near the edge of the rotating plate 4 on the side away from the bending portion 201, and the edge of the rotating plate 4 on the side away from the bending portion 201 is provided with a notch 42 at the position corresponding to the card hole, and the notch 42 is connected to the card hole so that the card protrusion enters the card hole from the notch 42, wherein the opening size of the notch 42 increases successively in the direction from the center of the card hole to the edge where the notch 42 is located, so that the notch 42 also has a guiding effect on the cooperation between the card protrusion and the card hole, which helps to improve the assembly efficiency.

[0064] Further, refer to Figure 8 As shown, a second support column 7 is provided on the side of the main board 3 facing the rotating plate 4, and a first engaging portion 32, such as a latching protrusion, can be provided at the end of the second support column 7 facing away from the main board 3, so that the second support column 7 can also have a certain supporting effect on the rotating plate 4, so that the relative distance between the rotating plate 4 and the main board 3 remains unchanged. At the same time, the second support column 7 has a certain extension dimension in the Z direction relative to the main board 3, thereby increasing the relative distance between the rotating plate 4 and the main board 3 in the Z direction to a certain extent, thereby further avoiding interference of the rotating plate 4 with the pole ear 21.

[0065] It should be noted that the second support column 7 can be integrally formed with the mainboard 3, with good integrity and high structural strength. Of course, in other implementations, the second support column 7 can also be connected to the mainboard 3 by welding or bonding with structural adhesive.

[0066] In some embodiments, reference Figure 1 and Figure 8 As shown, there are two pole lugs 21 and two rotating plates 4 . The two rotating plates 4 and the two pole lugs 21 are arranged at intervals along the length direction of the main board 3 , and the rotating plates 4 and the pole lugs 21 correspond one to one.

[0067] By arranging two rotating plates 4 on the main board 3, the two rotating plates 4 correspond to a pole ear 21 respectively. In other words, one rotating plate 4 corresponds to the positive pole ear of the pole ear 21, that is, one rotating plate 4 is located between the positive pole ear and the main body 22, and the other rotating plate 4 corresponds to the negative pole ear of the pole ear 21, that is, the other rotating plate 4 is located between the negative pole ear and the main body 22. In this way, the two rotating plates 4 will not tilt when assembled into the shell, so that the positive pole ear and the negative pole ear will not be interfered by the corresponding rotating plates, both meet the design state, and the performance of the battery monomer is better.

[0068] In some embodiments, reference Figure 1 As shown, the battery cell of this embodiment further includes an insulating film 84 and a bottom support plate 85 .

[0069] The insulating film 84 is coated on the outer wall of the battery cell 2, and the bottom support plate 85 is connected to the inner bottom wall of the shell 86. The battery cell 2 coated with the insulating film 84 is installed in the shell 86 and contacts the bottom support plate 85. The bottom support plate 85 isolates and supports the battery cell 2.

[0070] The insulating film 84 may be, for example, a polyester film having good insulating properties.

[0071] This embodiment also provides an electrical device, which includes a battery cell.

[0072] The battery cells in this embodiment have the same structure and implementation principle as the battery cells provided in the above embodiments, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above embodiments.

[0073] In this article, it should be noted that, unless otherwise clearly 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 indirectly connected through an intermediate medium, it can be the internal connection 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 orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 on the present application.

[0074] In this article, 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 such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cell, characterized in that: include: End cap (1); A battery cell (2) comprising a pole ear (21) and a main body (22), wherein the pole ear (21) is led out from a first end surface of the main body (22); The main board (3) and the rotating board (4) are located between the end cover (1) and the first end surface of the main body (22); the main board (3) is connected to the side of the end cover (1) facing the battery cell (2); the rotating board (4) is located between the pole ear (21) and the main body (22), and the rotating board (4) is rotatably connected to the main board (3) around a first axis, and the first axis is perpendicular to the main board (3).

2. The battery cell according to claim 1, characterized in that: The main board (3) is provided with a first rotating part (31), the rotating plate (4) is provided with a second rotating part (41), and the rotating plate (4) is connected to the main board (3) by means of rotational cooperation between the first rotating part (31) and the second rotating part (41).

3. The battery cell according to claim 2, characterized in that: The first rotating part (31) comprises a ball groove opening toward the rotating plate (4), and the second rotating part (41) comprises a ball head, which is rotatably accommodated in the ball groove around a first axis and is limited in the ball groove by the opening of the ball groove.

4. The battery cell according to claim 1, characterized in that: The pole ear (21) comprises a bent portion (201); a support member (6) is provided on the side of the main board (3) facing the rotating plate (4); one end of the support member (6) is connected to the main board (3), and the other end of the support member (6) abuts against the first end surface of the main body (22); in the width direction of the main board (3), the bent portion (201) and the support member (6) are arranged relative to each other.

5. The battery cell according to claim 4, characterized in that: In the width direction of the main board (3), a side of the support member (6) facing the bending portion (201) and a side of the rotating plate (4) facing away from the bending portion (201) abut against each other.

6. The battery cell according to claim 5, characterized in that: The support member (6) has a limiting groove (61) on the side facing the bending portion (201), and the rotating plate (4) is inserted into the limiting groove (61) on the side facing away from the bending portion (201).

7. The battery cell according to any one of claims 1 to 6, characterized in that: A first engaging portion (32) is provided on a side of the main board (3) facing the rotating board (4), and a second engaging portion (43) is provided on the rotating board (4); the rotating board (4) is connected to the main board (3) by engaging the first engaging portion (32) and the second engaging portion (43).

8. The battery cell according to any one of claims 4 to 6, characterized in that: The support member (6) is provided with a first engaging portion (32) on a side facing the bending portion (201), and the rotating plate (4) is provided with a second engaging portion (43) engaged with the first engaging portion (32) on a side facing away from the bending portion (201), wherein one of the first engaging portion (32) and the second engaging portion (43) is a engaging protrusion and the other is a engaging hole.

9. The battery cell according to any one of claims 1 to 6, characterized in that: There are two pole lugs (21) and two rotating plates (4). The two rotating plates (4) and the two pole lugs (21) are arranged at intervals along the length direction of the main plate (3). The rotating plates (4) and the pole lugs (21) correspond one to one.

10. An electrical device, characterized in that: The invention comprises a battery cell as claimed in any one of claims 1 to 9.

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