Battery and electric equipment

Abstract

The embodiment of the utility model provides a battery and electric equipment, and solves the problem of low battery capacity in the prior art. The battery provided by the embodiment of the utility model comprises a battery cell and a protection plate, one end of the battery cell in the first direction of the battery is provided with a groove and a lug boss, the battery cell comprises a naked battery cell and a shell covering the naked battery cell, and the end of the shell in the first direction of the battery is provided with an edge sealing structure; the area, corresponding to the groove, of the edge sealing structure extends outwards in the first direction to form an unfolded top edge sealing part; and at least one part of the protection plate is accommodated in the groove, and the protection plate is electrically connected with the battery cell. According to the battery disclosed by the utility model, the protection plate is arranged in the groove formed by the naked battery cell, so that the utilization rate of the space at one end of the naked battery cell is optimized. Therefore, the battery provided by the embodiment of the utility model has the advantages of high battery density and high disassembly and assembly convenience.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technical field, concretely relates to a battery, have the electric equipment of this battery with. BACKGROUND

[0002] In order to promote the safety of battery, prolong the service life of battery and improve the reliability of battery, the end of bare cell is equipped with protection plate to monitor the state of battery in real time. However, the existence of protection plate inevitably occupies the limited structural space of battery, resulting in the loss of battery capacity. SUMMARY

[0003] Therefore, the utility model embodiment is committed to providing a battery and electric equipment to solve the problem of battery capacity loss caused by the protection plate protruding from the cell occupying the limited structural space of the battery in the prior art.

[0004] The battery of the utility model embodiment comprises a cell and a protection plate.

[0005] The cell has a groove and a protruding part at one end in the first direction of the battery, the cell comprises a bare cell and a shell covering the bare cell, the shell has an edge sealing structure at the one end in the first direction of the battery, the edge sealing structure corresponding to the protruding part extends from one end of the bare cell and is folded towards the one end to form a folded top edge sealing part, and the edge sealing structure corresponding to the groove extends outward along the first direction to form an unfolded top edge sealing part; at least a part of the protection plate is accommodated in the groove, and the protection plate is electrically connected with the cell.

[0006] The battery of the utility model embodiment avoids the problem of occupying too much space in the battery due to the installation of the protection plate by arranging the groove accommodating the protection plate on one end of the bare cell, sets the protection plate in the groove formed by the bare cell itself, optimizes the utilization rate of the space at one end (head) of the bare cell, can accommodate a larger volume of bare cell without increasing the overall size of the battery pack, realizes the effective use of the overall space of the battery, and thus improves the energy storage capacity and battery density of the whole system.

[0007] In addition, the battery of the utility model embodiment extends the area corresponding to the groove of the edge sealing structure outward along the first direction to form an unfolded top edge sealing part, which can provide a clear mounting position for the protection plate, ensure that the protection plate can be accurately docked, and can position the protection plate, and improve the convenience of protection plate installation.

[0008] Therefore, the battery of the utility model embodiment has the advantages of high battery density and high installation convenience.

[0009] In some embodiments, the recess is disposed adjacent to one of the corners of the battery along a second direction, and the protrusion is disposed adjacent to another of the corners of the battery along the second direction, the second direction being perpendicular to the first direction.

[0010] In some embodiments, a transition surface between the protrusion and the recess is one of an inclined surface, a straight surface, and a curved surface.

[0011] In some embodiments, the un-folded top edge portion is disposed lower than the folded top edge portion, and a connection edge between the folded top edge portion and the un-folded top edge portion has a projection in a third direction that is one of an oblique angle, a right angle, and a curved line, the third direction being perpendicular to each of the first direction and the second direction.

[0012] In some embodiments, the folded top edge portion extends to a region corresponding to the transition surface along the second direction to form a limiting edge portion, the limiting edge portion, the inclined surface, and the un-folded top edge portion enclosing a limiting cavity, and the protection plate is disposed in the limiting cavity opposite the inclined surface.

[0013] In some embodiments, the protrusion has a first chamfered corner on a corner of a side of the protrusion away from the recess along the second direction.

[0014] In some embodiments, the bare cell has a second chamfered corner on a corner of a side of the bare cell opposite the protrusion.

[0015] In some embodiments, a corner of the folded top edge portion corresponding to the first chamfered corner of the protrusion has a top edge chamfered corner, a lower edge of the top edge chamfered corner being higher than or level with an upper end surface of the protrusion.

[0016] In some embodiments, an upper edge of the un-folded top edge portion is lower than or equal to the upper end surface of the protrusion.

[0017] In some embodiments, a length of the recess along the second direction is B, and a width of the protection plate is W, where B > L.

[0018] In some embodiments, in the first direction, a width of the recess is C, and a width of the protection plate is W, where C > W.

[0019] In some embodiments, in a third direction, a depth of the recess is D, and a thickness of the protection plate is H, where D > H, and the protection plate is disposed in the recess away from an end of the un-folded top edge portion.

[0020] In some embodiments, in the second direction, the minimum distance between the protection plate and the protruding part is a1, if the protection plate is a single flexible circuit board, a1 is 0mm-2mm, if the protection plate is a double flexible circuit board, a1 is 3mm-6mm.

[0021] In some embodiments, on the same side of the second direction, the distance between the end of the protection plate away from the protruding part and the side surface of the electric core is a2, a2 is 3mm-6mm.

[0022] In some embodiments, the protection plate comprises a protection plate body and a flexible circuit board arranged on the protection plate body, the flexible circuit board is arranged close to the protruding part, and the width of the flexible circuit board is less than 1 / 2 of the width of the protection plate body.

[0023] In other embodiments, the flexible circuit board is arranged at the end of the protection plate body away from the protruding part, and the corner close to the side of the flexible circuit board of the bare electric core is a cut corner.

[0024] In some embodiments, in the first direction, the distance between the upper end surface of the protection plate and the upper end surface of the protruding part is b1, b1 is 0-0.5mm.

[0025] In some embodiments, in the first direction, the distance between the lower edge of the protection plate and the inner wall surface of the groove is b2, b2 is 0-1mm.

[0026] In some embodiments, the battery further comprises a buffer layer, which is arranged between the sealing edge structure and the protection plate.

[0027] In some embodiments, the battery further comprises an adhesive layer, which is arranged between the sealing edge structure and the protection plate.

[0028] In some embodiments, the battery further comprises an insulating sealing layer, which and the sealing edge structure and the area corresponding to the groove are enclosed into a protection plate cavity, part of the protection plate is arranged in the protection plate cavity, and the insulating sealing layer is an injection glue layer or a glue paper sealing layer.

[0029] The electric device comprises the battery according to any one of the above. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a perspective view of the battery provided in an embodiment of the utility model.

[0031] Figure 2 It is an explosion view of the battery provided in an embodiment of the utility model.

[0032] Figure 3 is the front view of the battery provided by the utility model one embodiment.

[0033] Figure 4 is the structural schematic view of the cooperation of the bare electric core and the shell provided by the utility model one embodiment, wherein the edge sealing structure is bent before.

[0034] Figure 5 is the structural schematic view of the cooperation of the bare electric core and the shell provided by the utility model one embodiment, wherein the edge sealing structure is bent after.

[0035] Figure 6 is the structural schematic view of the cooperation of the bare electric core and the shell provided by the utility model one embodiment, wherein the edge sealing structure and the tab are bent after.

[0036] Figure 7 is the structural schematic view of the protection plate provided by the utility model one embodiment.

[0037] Figure 8 is the three-dimensional view of the cooperation of the bare electric core and the shell provided by the utility model one embodiment.

[0038] Figure 9 is the head cooperation size schematic view of the bare electric core and the protection plate provided by the utility model one embodiment.

[0039] Figure 10 is the structural schematic view of the battery provided by another embodiment of the utility model.

[0040] Figure 11 is the enlarged view of the top sealing structure of the battery provided by another embodiment of the utility model.

[0041] Figure 12 is the structural schematic view of the cooperation of the shell and the bare electric core provided by another embodiment of the utility model.

[0042] Figure 13 is the structural schematic view of the cooperation of the protection plate, the shell and the bare electric core provided by another embodiment of the utility model.

[0043] Figure 14 is the contrast view of the cooperation of the bare electric core and the shell before and after bending provided by another embodiment of the utility model, wherein the convex part and the groove are circularly transitioned.

[0044] Figure 15 is the contrast view of the cooperation of the bare electric core and the shell before and after bending provided by another embodiment of the utility model, wherein the convex part and the groove are obliquely transitioned.

[0045] Figure 16 is the contrast view of the cooperation of the bare electric core and the shell before and after bending provided by another embodiment of the utility model, wherein the convex part and the groove are straightly and angularly transitioned.

[0046] Figure 17 is a structural schematic view of cooperation of the protection plate, the bare battery cell and the shell provided in an embodiment of the utility model, wherein the convex part and the groove are straightly cut angle transition.

[0047] Figure 18 is a schematic view of battery assembling steps provided in an embodiment of the utility model.

[0048] Explanation of reference signs:

[0049] Battery 100;

[0050] Bare battery cell 1;Limiting cavity 10;Convex part 111;First cut angle 1111;Transition surface 1112;Groove 112;Second cut angle 1121;Tab 12;

[0051] Shell 2;Edge sealing structure 21;Folded top edge sealing part 211;Edge sealing cut angle 2111;Connection edge 212;Limiting edge part 213;

[0052] Unfolded top edge sealing part 213;Protection plate cavity 20;

[0053] Protection plate 3;Flexible circuit board 31;Protection plate body 32;

[0054] Buffer layer 4;

[0055] Adhesive layer 5;

[0056] Insulating sealing layer 6;Head adhesive layer 61;Top sealing adhesive layer 62. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0058] The following will be described with reference to Figures 1-18 The battery 100 and the electric equipment provided in the embodiments of the utility model are exemplarily described.

[0059] The battery 100 provided in the embodiments of the utility model comprises a battery cell and a protection plate 3.

[0060] The battery cell is at one end (for example, the lower end) of the battery 100 in the first direction (for example, the up-down direction) shown in the battery 100. Figure 13 Figure 13 The protection plate 3 is arranged on the other end (for example, the upper end) of the battery 100 in the first direction (for example, the up-down direction) shown in the battery 100.The battery 100 comprises a bare cell 1 and a shell 2 covering the bare cell 1, the shell 2 has an edge sealing structure 21 at the one end of the battery 100 in the first direction, the edge sealing structure 21 corresponds to the protruding part 111 and extends from the one end of the bare cell 1 and is folded towards the one end to form a folded top edge sealing part 211, and the edge sealing structure 21 corresponds to the groove 112 and extends outward in the first direction to form an unfolded top edge sealing part 213; at least a part of the protection plate 3 is accommodated in the groove 112, and the protection plate 3 is electrically connected with the bare cell 1.

[0061] The battery 100 has the advantages that the groove 112 is arranged on the one end of the bare cell 1 to accommodate the protection plate 3, thereby avoiding the problem that the protection plate 3 occupies too much space in the battery 100, the protection plate 3 is arranged in the groove 112 formed by the bare cell 1 itself, the utilization of the space of the one end (the head) of the bare cell 1 is optimized, a larger bare cell 1 can be accommodated without increasing the overall size of the battery 100, the overall space of the battery 100 is effectively utilized, and the energy storage capacity and the battery density of the whole system are improved.

[0062] In addition, the battery 100 has the advantages that the edge sealing structure 21 is folded towards the one end to form the folded top edge sealing part 211, and the folded part of the shell 2 does not increase the volume of the battery 100, the problem that the edge sealing structure 21 occupies too much space and affects the space utilization of the battery 100 is reduced, and the energy storage capacity and the battery density of the whole battery 100 are further improved.

[0063] Meanwhile, the edge sealing structure 21 corresponds to the groove 112 and extends outward in the first direction to form the unfolded top edge sealing part 213, the unfolded top edge sealing part 213 can provide a clear mounting position for the protection plate 3, and the unfolded top edge sealing part 213 can also limit the protection plate 3. Therefore, the convenience and stability of the installation of the protection plate 3 are improved.

[0064] Therefore, the battery 100 has the advantages of high battery density and high installation convenience.

[0065] For example, the bare cell 1 is substantially rectangular, the bare cell 1 can be arranged by alternately stacking positive electrode sheets and negative electrode sheets, and notches are arranged at positions on the same side of the positive electrode sheets and the negative electrode sheets to form the groove 112 after the stacking. Alternatively, the shell 2 can be a soft package. For example, the shell 2 can be made of an aluminum-plastic composite film.

[0066] As shown in Figures 1 to 6 The groove 112 is arranged close to one of the corners of the battery 100 along the second direction, and the protruding part 111 is arranged close to the other corner of the battery 100 along the second direction. Figure 13Another corner of the other one of the two directions (left-right direction shown in the figure) is provided with a second direction, which is perpendicular to the first direction. Figure 4 As shown in the figure, a groove 112 is arranged on one side of the upper end of the bare battery cell 1 to form a protrusion 111 and the groove 112 on the bare battery cell 1, the groove 112 is arranged on the right side of the groove 112, and the un-folded top sealing edge part 213 is arranged higher than the bottom of the groove 112 at the upper end.

[0067] The battery 100 of the embodiment of the utility model, by the cell is divided into groove 112 and protrusion 111 in the first direction of battery 100 one end, avoid the groove 112 is clamped between two protrusions 111, it is inconvenient to seal the sealing edge structure 21 corresponding to the groove 112 is handled. The battery 100 of the embodiment of the utility model sets up the groove 112 on one side, it is favorable to reduce the sealing joint surface of shell 2, has improved the convenience of the shell 2 to the bare battery cell 1 sealing.

[0068] As shown in the figure, Figures 1 to 6 , and Figures 8 to 12 As shown in the figure, the transition surface 1112 between the protrusion 111 and the groove 112 is an inclined surface.

[0069] Because the transition surface 1112 arranged in an inclined manner is relative to burr or uneven transition surface 1112, it is helpful to improve the effective capacity of the bare battery cell 1. Therefore, the transition surface 1112 arranged in an inclined manner between the protrusion 111 and the groove 112 is helpful to further increase the capacity density of the battery 100.

[0070] The application is not limited to this, in other embodiments, the transition surface 1112 between the protrusion 111 and the groove 112 can also be a straight surface (as shown in the figure) Figure 16 or a curved surface (as shown in the figure) Figure 12 . Similarly, the capacity density of the battery 100 is further increased.

[0071] The transition surface 1112 between the protrusion 111 and the groove 112 is one of an inclined surface, a straight surface and a curved surface, and correspondingly, the un-folded top sealing edge part 213 is arranged lower than the folded top sealing edge part 211, and the connection edge 212 between the folded top sealing edge part 211 and the un-folded top sealing edge part 213 is one of an inclined line (as shown in the figure) Figure 15 , a right angle line (as shown in the figure) Figure 16 and a curve (as shown in the figure) Figure 9 . In other words, the transition between the folded top sealing edge part 211 and the un-folded top sealing edge part 213 is inclined, right-angled or curved. At the same time, while ensuring the top sealing, the problem of excessive thickness caused by the volume of the folded top sealing edge part 211 is avoided, which helps to reduce the overall quality of the shell 2.

[0072] The battery of the embodiment of the utility model, through the inclination transition between the folded top edge sealing part 211 and the non-folded top edge sealing part 213, the non-folded top edge sealing part 213 is avoided from being affected by the bending of the folded top edge sealing part 211. Further, the convenience of the edge sealing structure 21 to the edge sealing of the place is improved.

[0073] The embodiment of the utility model can but not limited to set the shape of the connecting edge 212 and the transition surface 1112 as a consistent structure. For example, the transition surface 1112 between the convex part 111 and the groove 112 is a curved surface, and the connecting edge 212 between the folded top edge sealing part 211 and the non-folded top edge sealing part 213 can also be set as a straight cutting surface.

[0074] Further, as shown in Figures 1 to 6 , and Figures 8 to 12 , the convex part 111 and the groove 112 are inclined to form an inclined surface, and the end of the protection plate 3 opposite to the inclined surface is provided with an inclined surface matched with the inclined surface. In other embodiments, as shown in Figure 16 and Figure 17 , the transition surface 1112 between the convex part 111 and the groove 112 is a right angle surface, and the side of the protection plate 3 opposite to the right angle surface is a straight surface matched with the right angle surface. That is, the shape of the transition surface 1112 is matched with the shape of the end of the protection plate 3, avoiding the problem that the size of the protection plate 3 is limited due to the mismatch of the shapes of the protection plate 3 and the transition surface 1112, and further helping to increase the layout area of the protection plate 3.

[0075] As shown in Figure 12 , the folded top edge sealing part 211 extends to the area corresponding to the transition surface 1112 along the second direction to form a limiting edge part 213, and the limiting edge part 213, the inclined surface and the non-folded top edge sealing part 213 enclose a limiting cavity 10, and the side of the protection plate 3 opposite to the inclined surface (for example, the left side shown in Figure 13 ) is placed in the limiting cavity.

[0076] The battery 100 of the embodiment of the utility model, by placing a part of the protection plate 3 in the limiting cavity 10 formed by the folded top edge sealing part 211, the inclined surface and the non-folded top edge sealing part 213. When installing, one end of the protection plate 3 can be first inserted into the limiting cavity 10 to limit the protection plate 3 during installation; further, the installation of the protection plate 3 is assisted and limited to prevent the problem of displacement of the protection plate 3 during installation. Therefore, the convenience of the installation and positioning of the protection plate 3 is improved.

[0077] As shown in Figures 1 to 6 , and Figures 8 to 12 , the convex part 111 has a first chamfer 1111 at the corner (for example, the left corner shown in Figure 4 ) of the side away from the groove 112 in the second direction.

[0078] The battery 100 of the embodiment of the utility model, through setting first cut corner 1111 in the corner of the side of the second direction of protruding part 111 away from recess 112, the first cut corner 1111 can effectively disperse the stress of the sharp part of protruding part 111, prevent the problem of the shell 2 being easy to break when being subjected to external pressure or impact due to the sharp corner, help to reduce the risk of electrolyte leakage, increase the service life of battery 100.

[0079] Optionally, the first cut corner 1111 can be one of a straight cut corner, an arc chamfer and an inclined cut corner.

[0080] As shown in Figures 13 to 15 , the bare cell 1 forms a recess 112 and the corner of the side away from the protruding part 111 (such as the left side shown in Figure 13 ) has a second cut corner 1121. As above, the problem of the bare cell 1 being broken when the sharp corner is impacted is prevented. Thus, it helps to reduce the risk of electrolyte leakage, and increases the service life of the battery 100.

[0081] Optionally, the second cut corner 1121 can be one of a straight cut corner, an arc chamfer and an inclined cut corner.

[0082] As shown in Figures 13 to 16 , the corner of the top folding sealing edge part 211 corresponding to the first cut corner 1111 of the bare cell 1 has a sealing edge cut corner 2111, and the lower edge of the sealing edge cut corner 2111 is higher than or level with the upper end surface of the protruding part 111.

[0083] The battery 100 of the embodiment of the utility model, by setting the lower edge of the sealing edge cut corner 2111 to be higher than or level with the upper end surface of the protruding part 111, so as to ensure that the sealing edge structure 21 can be tightly attached to the top area of the corresponding protruding part 111 after being bent, thereby reducing the invalid occupation of the internal space of the battery 100. Thus, it helps to improve the volume of the bare cell 1. Further, the energy density of the battery 100 is further improved.

[0084] As shown in Figure 4 , the distance between the lower edge of the sealing edge cut corner 2111 and the upper end surface of the protruding part 111 is X1, and X1 is less than 0.3mm. Thus, by limiting the range of X1, it avoids that the size of X1 is too large to cause the top folding sealing edge part 211 after being bent to be unable to be attached to the top of the protruding part 111. Further, it saves the invalid occupation of the internal space of the battery 100, helps to improve the volume of the bare cell 1. Further, the energy density of the battery 100 is further improved.

[0085] Correspondingly, as shown in Figure 4As shown, the upper edge of the un-folded top sealing edge part 213 is lower than or equal to the upper end surface of the protruding part 111. Avoiding the un-folded top sealing edge part 213 being bent when the folded top sealing edge part 211 is bent, because the bent un-folded top sealing edge part 213 will interfere with the installation of the protection plate 3. Thus, the convenience of the installation of the protection plate 3 is improved.

[0086] At the same time, as shown in Figure 4 , the distance between the upper edge of the un-folded top sealing edge part 213 and the upper end surface of the protruding part 111 is X2, and X2 is less than 0.3mm. Similarly, avoiding the distance between the upper edge of the un-folded top sealing edge part 213 and the upper end surface of the protruding part 111 being too large, the space enclosed by the folded top sealing edge part 211, the un-folded top sealing edge part 213 and the bare battery cell 1 cannot well position the protection plate 3. Further, by limiting the range of X2, the protection plate 3 can be well positioned.

[0087] As shown in Figure 7 and Figure 8 , the length of the protruding part 111 in the second direction (X direction shown in Figure 1 , that is, the width direction of the battery 100) is A, the length of the groove 112 in the second direction is B, and the width of the protection plate 3 is W, wherein B>L; in the first direction (Y direction shown in Figure 1 , that is, the height direction of the battery 100), the width of the groove 112 is C, and the width of the protection plate 3 is W, wherein C>W, in the third direction (Z direction shown in Figure 1 , that is, the thickness direction of the battery 100), the depth of the groove 112 is D, and the thickness of the protection plate 3 is H, wherein D>H, and the protection plate 3 is located in the groove 112 at the end away from the un-folded top sealing edge part 213. It can be understood that the size of the groove 112 is greater than the size of the protection plate 3, and thus it is ensured that the entire protection plate 3 can fall into the groove 112.

[0088] The battery 100 of the embodiment of the utility model, through the entire protection plate 3 is arranged in the groove 112, avoid because the protection plate 3 protrudes bare battery cell 1 outside and occupies the whole space of battery 100 exists the problem of influencing battery density. Thus, the size of the protection plate 3 is less than the size of the groove 112, which helps to further improve the energy density of the battery 100.

[0089] As shown in Figure 9 , in the second direction, the minimum distance between the protection plate 3 and the protruding part 111 is a1, if the protection plate 3 is a single flexible circuit board 31, a1 is 0mm~2mm, if the protection plate 3 is a double flexible circuit board 31 (PFC, Flexible Printed Circuit), a1 is 3mm~6mm.

[0090] The battery 100 of the embodiment of the utility model, through limit the interval a1 between the flexible circuit board 31 and the convex part 111, guarantee FPC has certain range of motion, prevented the flexible circuit board 31 and the installation interference problem between the edge sealing structure 21.

[0091] Optionally, if the protection plate 3 is double PFC, a1 can be 3mm, 4mm, 5mm or 6mm. If the protection plate 3 is single flexible circuit board 31, a1 is 0mm, 1mm or 2mm.

[0092] As shown in the second direction on the same side, the protection plate 3 is away from the convex part 111 on the side (as shown on the right side) between the side edge of the bare cell 1 and the interval a2, a2 is 3mm~6mm. Figure 9 Figure 4 The battery 100 of the embodiment of the utility model, through limit the interval a2 between the protection plate 3 on the side away from the convex part 111 and the side edge of the bare cell 1. Avoid the problem that the interval is too large to cause the size of the protection plate 3 to be too small. And the protection plate 3 is too small to accommodate a conductive path of sufficient width and thickness, which in turn leads to increased resistance. In addition, the small size of the protection plate 3 may not provide sufficient connection area, resulting in insufficient electrical connection and prone to poor contact or open circuit problems. Therefore, by limiting the range of a2, the reliability of the electrical connection of the protection plate 3 is improved, and the resistance effect of the protection plate 3 during conduction is reduced.

[0093] As shown in the second direction on the same side, the protection plate 3 is away from the convex part 111 on the side (as shown on the right side) between the side edge of the bare cell 1 and the interval a2, a2 is 3mm~6mm.

[0094] As shown in the second direction on the same side, the protection plate 3 is away from the convex part 111 on the side (as shown on the right side) between the side edge of the bare cell 1 and the interval a2, a2 is 3mm~6mm. Figure 11 The battery 100 of the embodiment of the utility model, through limit the width ratio of the flexible circuit board 31 and the width of the protection plate body 32. Because the FPC size is too large to occupy more additional accommodation space, which is not conducive to the compactness of the battery 100 (portable devices, such as smart phones, tablets have relatively high overall compactness requirements). Moreover, the FPC size may cause the device to be bulky, which does not meet the design trend of light and thin. And the FPC size is too small to cause the resistance to increase and the number of solder joints to decrease, which in turn causes high power loss and poor connection firmness. Therefore, by reasonably setting the width range between the flexible circuit board 31 and the protection plate body 32, the battery 100 has the advantages of light and thin, low energy consumption and high connection firmness.

[0095]

[0096] ​​Optionally, the width of the flexible circuit board 31 can be 3mm-5mm; for example, the width of the flexible circuit board 31 is 3mm, 4mm or 5mm. The width of the protection plate body 32 is greater than 6mm.

[0097] As shown in FIG. 1, the flexible circuit board 31 is arranged at one end of the protection plate body 32 away from the protruding portion 111 (the right side shown in FIG. 1), and the corner of the bare cell 1 close to the flexible circuit board 31 is a cut corner. Figure 13 Figure 13

[0098] The battery 100 of the embodiment of the utility model, through setting the flexible circuit board 31 at one end of the protection plate body 32 away from the protruding portion 111, the flexible circuit board 31 at this end can be directly led out, and the flexible circuit board 31 at this end is substantially away from the folded top edge portion 211, and the flexible circuit board 31 arranged at one end away from the protruding portion 111 will not have the problem of position interference with the folded top edge portion 211.

[0099] In the first direction, the distance between the upper end surface of the protection plate 3 and the upper end surface of the protruding portion 111 is b1, which can be 0-0.5mm, and the distance between the lower edge of the protection plate 3 and the inner wall surface of the groove 112 is b2, which is 0-1mm. Thus, the problem that the protection plate 3 protrudes out of the groove 112 and occupies the internal space of the battery 100 can be avoided, so that a larger volume of the bare cell 1 can be accommodated without increasing the overall size of the battery 100, thereby effectively utilizing the overall space of the battery 100 and improving the density of the battery 100.

[0100] Optionally, the lower edge of the protection plate 3 and the inner wall surface of the groove 112 can be filled or attached with a buffer structure, such as a silica gel pad or foam.

[0101] Optionally, b1 can be 0, 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm.

[0102] Optionally, b2 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1.0mm.

[0103] The tab 12 protrudes out of the bare cell 1 from the groove 112 of the bare cell 1, and the tab 12 is connected with the protection plate 3.

[0104] The battery 100 of the embodiment of the utility model, by protruding the tab 12 out of the bare cell 1 from the groove 112 of the bare cell 1, correspondingly, the tab 12 protruding out of the bare cell 1 is directly connected with the protection plate 3 installed at this position, thereby the length of the tab 12 can be reduced, which helps to reduce the resistance and improve the convenience of connection.

[0105] As​​Figure 1 and Figure 2 As shown, the battery 100 in this embodiment of the present invention also includes a buffer layer 4, which is disposed between the sealing structure 21 and the protective plate 3.

[0106] Optionally, the buffer layer 4 can be foam or a silicone pad. To protect the top of the battery cell from impacts from the protective plate 3, a buffer such as foam or a silicone pad can be attached between the two.

[0107] In some embodiments, the battery 100 of this utility model may further include an adhesive layer 5, which is disposed between the unfolded top sealing portion 213 and the protective plate 3. For example, the adhesive layer 5 may be double-sided tape. It serves both a fixing function and a cushioning and protective function.

[0108] Optionally, the adhesive layer 5 and the cushioning layer 4 can be integrated into a single structure. For example, the adhesive layer 5 and the cushioning layer 4 can be integrated into foam adhesive or double-sided adhesive.

[0109] The battery 100 of this utility model embodiment also includes an insulating sealing layer 6. The insulating sealing layer 6 and the sealing edge structure 21 and the area corresponding to the groove form a protective plate cavity 20. A part of the protective plate 3 is disposed in the cavity of the protective plate 3. The insulating sealing layer 6 is an injection layer or an adhesive paper sealing layer.

[0110] Furthermore, the insulating sealant 6 can be divided into a head sealant layer 61 and a top sealant layer 62. Moreover, the insulating sealant 6 can be an adhesive injection structure located at the head of the battery 100. With this adhesive injection structure, the head sealant can be eliminated, and applying adhesive to the head of the battery 100 where the protection board 3 is placed helps improve the overall structural reliability.

[0111] like Figure 18 As shown, during assembly, the top sealing adhesive layer 62, the protective plate 3, and the head adhesive layer 61 can be installed in sequence.

[0112] The electrical device of this embodiment includes a battery 100 according to any one of the above claims. The area corresponding to the sealing structure 21 and the groove 112 extends outward along a first direction to form an unfolded top sealing portion 213. This unfolded top sealing portion 213 provides a clear installation position and limit for the protection plate 3, ensuring that the protection plate 3 can be accurately connected and reducing the risk of poor contact. Therefore, the battery 100 of this embodiment has the advantages of high battery density and high ease of installation.

[0113] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0114] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0115] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like 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 or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0116] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0117] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled person in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0118] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A battery, characterized by, The battery comprises: an electric core having a recess and a protrusion at one end in a first direction of the battery, the electric core comprising a bare electric core and a shell covering the bare electric core, the shell having an edge structure at the one end in the first direction of the battery, the edge structure corresponding to the protrusion extending from the one end of the bare electric core and being folded towards the one end to form a folded top edge portion, the edge structure corresponding to the recess extending outward in the first direction to form an un-folded top edge portion; a protection plate, at least a portion of the protection plate being accommodated in the recess, the protection plate being electrically connected with the electric core.

2. The battery according to claim 1, wherein: the recess is arranged close to one corner of the battery in a second direction, the protrusion is arranged close to another corner of the battery in the second direction, the second direction being perpendicular to the first direction.

3. The battery according to claim 2, wherein: a transition surface between the protrusion and the recess is one of an inclined surface, a straight surface and a curved surface; and / or, the un-folded top edge portion is arranged lower than the folded top edge portion, a connecting edge between the folded top edge portion and the un-folded top edge portion has a projection in a third direction being one of an inclined line, a straight line and a curved line, the third direction being perpendicular to each of the first direction and the second direction.

4. The battery according to claim 3, wherein: the folded top edge portion extends to a region corresponding to the transition surface in the second direction to form a limiting edge portion, the limiting edge portion, the inclined surface and the un-folded top edge portion enclose a limiting cavity, a side of the protection plate opposite to the inclined surface being arranged in the limiting cavity.

5. The battery according to claim 2, wherein: the protrusion has a first corner cut at a corner of a side of the protrusion away from the recess in the second direction; and / or, the bare electric core has a second corner cut at a corner of a side of the bare electric core opposite to the protrusion.

6. The battery according to claim 5, wherein: a corner of the folded top edge portion corresponding to the first corner cut of the protrusion has an edge cut corner, a lower edge of the edge cut corner being higher than or level with an upper end surface of the protrusion; and / or, an upper edge of the un-folded top edge portion is lower than or equal to the upper end surface of the protrusion.

7. The battery according to claim 6, wherein: a length of the recess in the second direction is B, a width of the protection plate is W, and B > L; and / or, in the first direction, a width of the recess is C, a width of the protection plate is W, and C > W; and / or, in a third direction, a depth of the recess is D, a thickness of the protection plate is H, and D > H, and the protection plate is arranged in the recess at an end away from the un-folded top edge portion.

8. The battery according to claim 7, wherein: In the second direction, the minimum distance between the protection plate and the convex part is a1, a1 is 0-2mm if the protection plate is a single flexible circuit board, and a1 is 3-6mm if the protection plate is a double flexible circuit board; And / or, on the same side of the second direction, the distance between the end of the protection plate away from the convex part and the side surface of the battery cell is a2, a2 is 3-6mm.

9. The battery of claim 8, wherein, The protection plate comprises a protection plate body and a flexible circuit board arranged on the protection plate body, the flexible circuit board is arranged close to the convex part, and the width of the flexible circuit board is less than 1 / 2 of the width of the protection plate body; Or, the flexible circuit board is arranged at the end of the protection plate body away from the convex part, and the corner close to the side of the flexible circuit board of the bare battery cell is a cut corner.

10. The battery of claim 7, wherein, In the first direction, the distance between the upper end surface of the protection plate and the upper end surface of the convex part is b1, b1 is 0-0.5mm; And / or, in the first direction, the distance between the lower edge of the protection plate and the inner wall surface of the groove is b2, b2 is 0-1mm.

11. The battery of any one of claims 1-10, wherein, Further comprising a buffer layer, the buffer layer is arranged between the sealing edge structure and the protection plate; And / or, further comprising an adhesive layer, the adhesive layer is arranged between the sealing edge structure and the protection plate; And / or, further comprising an insulating sealing layer, the insulating sealing layer and the sealing edge structure and the area corresponding to the groove of the protection plate form a protection plate cavity, part of the protection plate is arranged in the protection plate cavity, and the insulating sealing layer is an injection glue layer or a glue paper sealing layer.

12. An electrical device, characterized by The battery comprises the battery according to any one of claims 1-11.

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