Battery and electric equipment

Abstract

The embodiment of the utility model provides a battery and electric equipment. The problems of low battery capacity and easy loosening of tab connection in the prior art are solved. The battery provided by the embodiment of the utility model comprises a battery cell and a protection plate, one end, in the first direction of the battery, of the battery cell is provided with an accommodating part and a lug boss; at least one part of the protection plate is accommodated in the accommodating part, a groove is formed in one side of the protection plate, and one part of a tab of the battery cell is arranged in the groove. Therefore, the battery provided by the embodiment of the utility model has the advantages of high battery density and high electrical connection reliability.

Description

TECHNICAL FIELD

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

[0002] In order to promote the safety of battery, prolong service life and improve its reliability, will install the protection plate at the end of the battery cell to monitor the state of battery cell in real time.But because the space of the end of the battery cell is limited, the protection plate protruding from the battery cell will occupy a certain battery space, resulting in the problem of battery capacity loss. UTILITY MODEL CONTENTS

[0003] Therefore, the utility model embodiment is committed to providing a battery and electric equipment, by at least a part of the protection plate is contained in the containing portion, solve the problem that the protection plate is stacked high due to the setting of the tab under the protection plate in the prior art, affect the space utilization of the battery.

[0004] The utility model discloses a battery in one aspect. The battery comprises a battery cell and a protection plate.

[0005] The battery cell has a containing portion and a protruding portion at one end of the battery in a first direction, at least a part of the protection plate is contained in the containing portion, and one side of the protection plate has a groove, and a part of the tab of the battery cell is arranged in the groove.

[0006] The battery of the utility model embodiment sets the containing portion containing the protection plate at one end of the battery cell along the first direction, thereby avoiding the problem of occupying too much space inside the battery due to the installation of the protection plate, setting the protection plate in the containing portion formed by the battery cell itself, optimizing the utilization of the space at one end (head) of the battery cell, and accommodating a larger volume of battery cell without increasing the overall size of the battery, realizing the effective utilization of the overall space of the battery, thereby improving the energy storage capacity and battery density of the whole system.

[0007] At the same time, the groove of the protection plate can avoid the problem of moving up the protection plate due to the tab, thereby making the protection plate protrude out of the battery cell and affecting the space utilization. Therefore, the energy storage capacity and battery density of the whole system are further improved.

[0008] Therefore, the battery of the utility model embodiment has the advantage of improving the battery density.

[0009] In some embodiments, the electric core has a top surface and a side surface, the top surface has the accommodating portion and the protruding portion, the side surface is located at one end of the electric core along a second direction, the protection plate comprises a protection plate body and a flexible circuit board arranged on the protection plate body, the protection plate body is arranged in the accommodating portion, and a side of the protection plate body opposite to the side surface of the electric core is provided with the groove.

[0010] In some embodiments, the tab of the electric core protrudes out of the bare electric core from the accommodating portion, the protection plate body is provided with a conductive sheet on the side surface adjacent to the groove, the conductive sheet is opposite to the one end of the electric core, a part of the tab is bent and placed in the groove, and the part of the tab extending out of the groove is connected to the protection plate body through the conductive sheet.

[0011] In some embodiments, the flexible circuit board is arranged close to the protruding portion, and the width of the flexible circuit board is less than 1 / 2 of the width of the protection plate body.

[0012] In other embodiments, in the third direction, the flexible circuit board is arranged at one end of the protection plate body away from the protruding portion, and the corner of the electric core close to the side of the flexible circuit board is a beveled corner.

[0013] In some embodiments, the electric core comprises a shell and a bare electric core, the shell covers the bare electric core, the shell is provided with an edge sealing structure at the one end, at the one end of the bare electric core, one side of the bare electric core in a third direction protrudes relative to the other side to correspond to form the accommodating portion and the protruding portion, the area corresponding to the protruding portion of the edge sealing structure is bent towards the bare electric core to form a folded top sealing portion, and the third direction is perpendicular to the first direction.

[0014] In some embodiments, the area corresponding to the accommodating portion of the edge sealing structure extends in the first direction to form an unfolded top portion.

[0015] In some embodiments, the unfolded top portion is arranged lower than the folded top sealing portion, the connection edge between the folded top sealing portion and the unfolded top portion has one of an oblique angle line, a right angle line and a curve in a projection in a second direction, and the second direction is perpendicular to each of the first direction and the third direction.

[0016] In some embodiments, the transition surface between the protruding portion and the accommodating portion is one of an inclined surface, a straight surface and a curved surface.

[0017] In other embodiments, a recess lower than the accommodating portion is arranged between the protruding portion and the accommodating portion.

[0018] In some embodiments, the protruding portion has a first chamfered corner at a corner of a side of the protruding portion away from the accommodating portion in the third direction.

[0019] In some embodiments, the protruding portion has a first chamfered corner at a corner of a side of the protruding portion away from the accommodating portion in the third direction.

[0020] In some embodiments, the protruding portion has a first chamfered corner at a corner of a side of the protruding portion away from the accommodating portion in the third direction.

[0021] In some embodiments, the protruding portion has a first chamfered corner at a corner of a side of the protruding portion away from the accommodating portion in the third direction.

[0022] In some embodiments, the protruding portion has a first chamfered corner at a corner of a side of the protruding portion away from the accommodating portion in the third direction.

[0023] In some embodiments, the protruding portion has a first chamfered corner at a corner of a side of the protruding portion away from the accommodating portion in the third direction.

[0024] The power equipment includes the battery according to any one of the above. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a perspective view of the battery provided by an embodiment of the utility model.

[0026] Figure 2 is an explosion view of the battery provided by an embodiment of the utility model.

[0027] Figure 3 is a front view of the battery provided by an embodiment of the utility model.

[0028] Figure 4 is a side view of the battery provided by an embodiment of the utility model.

[0029] Figure 5 is a structure schematic view of the bare battery cell and the shell cooperation provided by an embodiment of the utility model, wherein the edge structure is bent before.

[0030] Figure 6 is a structure schematic view of the bare battery cell and the shell cooperation provided by an embodiment of the utility model, wherein the edge structure is bent after.

[0031] Figure 7 is a structure schematic view of the bare battery cell and the shell cooperation provided by an embodiment of the utility model, wherein the edge structure and the tab are bent after.

[0032] Figure 8It is structural schematic view of the protection plate provided by an embodiment of the utility model.

[0033] Figure 9 It is the perspective view of the bare electric core and the shell after cooperation provided by an embodiment of the utility model.

[0034] Figure 10 It is the head of the bare electric core and the cooperation size of the protection plate main body provided by an embodiment of the utility model.

[0035] Figure 11 It is the three-dimensional schematic view of the cooperation structure of the bare electric core, the protection plate and the shell provided by an embodiment of the utility model.

[0036] Figure 12 It is the schematic view of the cooperation structure of the bare electric core, the protection plate and the shell provided by an embodiment of the utility model.

[0037] Figure 13 It is the sectional view of the shell, the protection plate and the tab connecting position provided by another embodiment of the utility model.

[0038] Figure 14 It is the schematic view of the protection plate cloth area provided by an embodiment of the utility model.

[0039] Figure 15 It is the perspective view of the battery provided by another embodiment of the utility model.

[0040] Figure 16 It is the perspective exploded view of the battery provided by another embodiment of the utility model.

[0041] Figure 17 It is the front view of the battery provided by another embodiment of the utility model.

[0042] Figure 18 It is the schematic view of different recess structures in the battery provided by some embodiments of the utility model.

[0043] Figure 19 It is the contrast view of the protection plate before and after installation and the bare electric core and the shell before and after cooperation provided by still another embodiment of the utility model.

[0044] Figure 20 It is the schematic view of the battery assembly steps provided by an embodiment of the utility model.

[0045] Mark explanation:

[0046] Battery 100;

[0047] Electric core 1;

[0048] Bare electric core 11;Convex part 111;First cut angle 1111;Transition surface 1112;

[0049] Receiving portion 112; Second chamfer 1121; Recess 113;

[0050] 12; 121; 1211; 1212;

[0051] Top 122 (not folded over);

[0052] Electrode 13;

[0053] 2. Protective plate; 21. Protective plate body; 211. Groove; 22. Flexible circuit board; 221. Main body; 222. U-shaped hook; 23. Conductive sheet;

[0054] Protective plate cavity 3;

[0055] Buffer layer 4;

[0056] Adhesive layer 5;

[0057] Insulating sealant 6; head adhesive layer 61; top sealing adhesive layer 62. Detailed Implementation

[0058] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0059] The following is for reference. Figures 1-20 The present invention will describe the battery 100 and the electrical equipment provided in the embodiments of the present invention by way of example.

[0060] The battery 100 of this embodiment includes a battery cell 1 and a protection board 2.

[0061] Cell 1 in the first direction of battery 100 (e.g., Figure 5 One end (upper end) of the protective plate 2 (shown in the up-down direction) has a receiving portion 112 and a protrusion 111; at least a portion of the protective plate 2 is housed in the receiving portion 112, and one side of the protective plate 2 has a groove 211, and a portion of the electrode tab 13 of the battery cell 1 is disposed in the groove 211.

[0062] The battery 100 of the embodiment of the utility model, through setting the accommodating part 112 accommodating the protection plate 2 in the first direction of the battery 100 at one end of the battery 100, further avoid the problem of occupying too much space in the battery 100 due to the installation of the protection plate 2, set the protection plate 2 in the accommodating part 112 formed by the battery 1 itself, optimize the utilization rate of the space of one end (head) of the battery 1, can accommodate the battery 1 of larger volume without increasing the overall size of the battery 100, realize the effective use of the overall space of the battery 100, thereby improve the energy storage capacity of the whole battery system and the energy density of the battery 100.

[0063] Meanwhile, the length and height of the protruding part 111 of the bare battery cell 11 can be flexibly adjusted according to the length and width of the protection plate 2, and the size of the protection plate 2 can be changed, the length and height of the protruding part 111 will also change, overcoming the problem that once the protection plate 2 in the traditional battery 100 is changed, the head of the battery 100 will have extra space or the size of the used electrical equipment will increase.

[0064] In addition, the groove 211 of the protection plate 2 can avoid the problem of moving up of the protection plate 2 due to the tab 13, and further make the protection plate 2 protrude out of the battery cell 1, affect the space utilization rate. Thus further improve the energy storage capacity of the whole system and the energy density of the battery 100.

[0065] In addition, the groove 211 is arranged on one side of the protection plate 2, and part of the tab 13 is arranged in the groove 211. The positioning of the tab 13 by the groove 211 can ensure that the tab 13 of the battery 100 is accurately aligned with the pad or connecting point on the protection plate 2, avoiding the problem of poor contact or welding quality caused by the position deviation of the tab 13, and further preventing the problem of loosening or displacement of the tab 13 caused by vibration or impact during use of the battery 100, thereby arranging the tab 13 on the protection plate 2, improving the firmness of the electrical connection between the tab 13 and the protection plate 2.

[0066] Therefore, the battery 100 of the embodiment of the utility model has the advantages of improving the density and electrical connection reliability of the battery 100.

[0067] Specifically, the battery cell 1 includes a shell 12 and a bare battery cell 11, the shell 12 covers the bare battery cell 11, the bare battery cell 11 is rectangular, and the bare battery cell 11 can be arranged by alternately stacking positive plates and negative plates. The positions of the positive plates and the negative plates on the same side are provided with notches to form the accommodating part 112 after stacking, and the edge sealing structure corresponds to the head of the bare battery cell 11. Optionally, the shell 12 can be a soft package. For example, the shell 12 can be made of an aluminum-plastic composite film.

[0068] As Figure 1 , Figure 2 and Figure 11As shown, the electric core 1 has a top surface and a side surface, the top surface has a receiving portion 112 and a protruding portion 111, and the side surface is located at one end of the electric core 1 along a second direction (for example Figure 1 As shown in the Z direction in the middle, the protection plate 2 includes a protection plate body 21 and a flexible circuit board 22 (PFC, Flexible Printed Circuit) arranged on the protection plate body 21, the protection plate body 21 is arranged in the receiving portion 112, and the side of the protection plate body 21 opposite to the side surface of the electric core 1 is provided with a groove 211, and the second direction is arranged perpendicular to the first direction. It can be understood that part of the tab 13 will be limited between the electric core 1 and the protection plate 2.

[0069] The battery 100 of the embodiment of the utility model, through the protection plate 2 is divided into protection plate body 21 and the flexible circuit board 22 arranged on the protection plate body 21, when the protection plate 2 is connected with the tab 13, the tab 13 can be placed in the groove 211 after being bent, and the space occupied by the tab 13 in the thickness direction of the protection plate 2 is reduced. At the same time, the tab 13 will be limited between the electric core 1 and the protection plate 2, and then, the tab 13 is prevented from loosening or shifting due to vibration or impact during use, and the reliability of the connection of the tab 13 is improved.

[0070] As shown in Figure 5 , Figure 6 and Figure 9 , the tab 13 of the electric core 1 protrudes from the electric core 1 outside the receiving portion 112. It can be understood that the tab 13 protruding from the bare electric core 11 at this position can be directly connected with the protection plate 2 installed at this position, and then the length of the tab 13 can be reduced, and the length of the tab 13 can be reduced. The resistance at this position is low, and the tab 13 protruding from the bare electric core 11 at the receiving portion 112 of the bare electric core 11 can be directly connected with the protection plate 2 at this position, and then the convenience of the connection between the protection plate 2 and the tab 13 is improved.

[0071] As shown in Figure 13 and Figure 17 , the protection plate body 21 is provided with a conductive sheet 23 on the side surface adjacent to the groove 211, the conductive sheet 23 is opposite to one end of the electric core 1, part of the tab 13 is placed in the groove 211, and the part of the tab 13 extending out of the groove 211 is connected with the protection plate body 21 through the conductive sheet 23. Specifically, as shown in the up-down direction in Figure 17 , the conductive sheet 23 is arranged on the lower surface of the protection plate body 21.

[0072] The battery 100 of the embodiment of the utility model, the tab 13 passes through the groove 211 and is connected with the protection plate body 21 through the conductive sheet 23. Therefore, the tab 13 can be limited by the groove 211, and space is provided for the arrangement position of the conductive sheet 23. Further, the arrangement space of the protection plate 2 is further improved.

[0073] Optionally, the conductive sheet 23 can be a nickel plate.

[0074] Further, as shown in Figure 14 , Figure 15 and Figure 17 , the flexible circuit board 22 includes a main body portion 221 and a U-shaped hook portion 222 bent along one end of the main body portion 221, the U-shaped hook portion 222 being engaged on the protection plate main body 21.

[0075] The battery 100 of the embodiment of the utility model, through the U-shaped hook portion 222 of the flexible circuit board 22 is engaged on the protection plate main body 21. Because the contact surface is small and can cause the heat generation to be serious here. Thus, the contact area between the flexible circuit board 22 and the protection plate main body 21 can be increased, the heat generation problem is reduced, and the safety of the battery 100 is improved, the structure of the U-shaped hook portion 222 can effectively reduce the resistance in the current transmission process, reduce the energy loss, and thus improve the overall efficiency of the system.

[0076] Further, the two side end arms of the U-shaped hook portion 222 are oppositely arranged along the up-down direction as shown in the first direction (Y direction) in the figure, and the end arm of one side of the U-shaped hook portion 222 is connected with one end of the groove 211 of the bare cell 11. That is, the protection plate 2 is vertically placed. Figure 17

[0077] In some embodiments, the flexible circuit board 22 is arranged close to the protruding portion 111, and the width of the flexible circuit board 22 is less than 1 / 2 of the width of the protection plate main body 21.

[0078] The battery 100 of the embodiment of the utility model, by limiting the width ratio of the flexible circuit board 22 and the protection plate main body 21. Because the FPC size is too large, more additional accommodation space is occupied, which is not conducive to the compactness of the battery 100 (the overall compactness requirement of portable devices such as smart phones and tablet computers is relatively high). Moreover, the FPC size that is too large can cause the device to be heavy, which does not meet the design trend of light and thin. And the FPC size that is too small can cause the resistance to increase and the number of solder joints to decrease, thereby causing the problems of high power loss and poor connection firmness. Thus, by reasonably setting the width range between the flexible circuit board 22 and the protection plate main body 21, the battery 100 has the advantages of high lightness, low energy consumption and high connection firmness.

[0079] Optionally, the width of the flexible circuit board 22 can be 3mm-5mm. For example, the width of the flexible circuit board 22 is 3mm, 4mm or 5mm. The width of the protection plate main body 21 is greater than 6mm.

[0080] As shown in Figure 2 , Figure 11 and Figure 17 ​As shown, the flexible circuit board 22 is disposed at the end of the protective board body 21 away from the protrusion 111. Figure 17 As shown on the right side), the corner of the battery cell 1 near the flexible circuit board 22 is chamfered.

[0081] In this embodiment of the utility model, the battery 100 has a flexible circuit board 22 disposed at the end of the protective plate body 21 away from the protrusion 111. The flexible circuit board 22 at this end can be directly led out of the battery cell 1. The flexible circuit board 22 at this end is substantially away from the top folding seal 121. The flexible circuit board 22 disposed at the end away from the protrusion 111 will not cause positional interference with the top folding seal 121.

[0082] like Figure 3 and Figure 6 As shown, the battery cell 1 includes a housing 12 and a bare battery cell 11. The housing 12 covers the bare battery cell 11, and the housing 12 has a sealing structure at one end. At one end of the bare battery cell 11, the bare battery cell 11 is in a third direction (e.g., Figure 17 In the left-right direction shown, one side protrudes relative to the other side to form a receiving portion 112 and a protrusion 111. The sealing structure and the area corresponding to the protrusion 111 are bent toward the bare cell 11 to form a folded top sealing portion 121. The third direction is set perpendicular to the first direction.

[0083] The battery 100 of this embodiment can seal the top of the protrusion 111 by means of the folded top seal 121 formed by bending, thus eliminating the need for other sealing structures (e.g., sealing stickers) to seal this area. The folded top seal 121 formed by bending greatly reduces the relative sealing surface, thereby significantly reducing the risk of leakage from the casing 12. Moreover, the bent portion of the casing 12 can achieve a better sealing effect without increasing the thickness of the battery 100, which helps to achieve a thinner and lighter design for the battery 100.

[0084] like Figure 5 and Figure 7 As shown, the area corresponding to the sealing structure and the receiving part 112 extends along the first direction to form an unfolded top 122.

[0085] In this embodiment of the utility model, the battery 100 extends the area corresponding to the sealing structure and the receiving part 112 along the first direction to form an unfolded top 122, which can provide a limit for the protection plate 2 to avoid displacement of the protection plate 2, ensure that the protection plate 2 is accurately connected, and reduce the risk of poor contact.

[0086] For example, Figure 5 As shown, the upper edge of the unfolded top 122 extends out of the receiving portion 112.

[0087] like Figure 5 and Figure 11As shown, the unfolded top portion 122 is arranged lower than the folded top portion 121, and the connecting edge 1212 between the folded top portion 121 and the unfolded top portion 122 is one of an oblique line (as shown in Figure 5 As shown in Figure 19 The second direction is arranged perpendicular to each of the first direction and the third direction. In other words, the transition between the folded top portion 121 and the unfolded top portion 122 is an oblique transition, a right-angle transition, or a curved transition.

[0088] The battery 100 of the embodiment of the utility model, through the unfolded top portion 122 is arranged lower than the folded top portion 121, avoid the unfolded top portion 122 with the bending of the folded top portion 121 is affected, and then guarantee that the folded top portion 121 can be tightly attached after bending to the convex portion 111 to carry out insulation covering to bare electric core 11. Further, the convenience of the edge sealing structure to the edge sealing place is improved.

[0089] Correspondingly, as shown in Figures 5 to 7 The transition between the folded top portion 121 and the unfolded top portion 122 is an oblique transition, and the transition surface 1112 between the convex portion 111 and the accommodating portion 112 is an inclined surface.

[0090] As shown in Figure 5 And Figure 11 The transition surface 1112 between the convex portion 111 and the accommodating portion 112 is an inclined surface.

[0091] The battery 100 of the embodiment of the utility model, by the transition surface 1112 between the convex portion 111 and the accommodating portion 112 is arranged as an inclined surface, because the transition surface 1112 arranged obliquely is helpful to improve the effective capacity of bare electric core 11 compared with burr or uneven transition surface 1112. Therefore, the transition surface 1112 arranged obliquely between the convex portion 111 and the accommodating portion 112 further increases the capacity density of the battery 100.

[0092] The application is not limited to this, in other embodiments, the transition surface 1112 between the convex portion 111 and the accommodating portion 112 can also be a straight surface or a curved surface. Similarly, the capacity density of the battery 100 is further increased.

[0093] The embodiment of the utility model can but not limited to the shape of the connecting edge 1212 and the transition surface 1112 is arranged as a consistent structure. For example, the transition surface 1112 between the convex portion 111 and the accommodating portion 112 is a curved surface, and the connecting edge 1212 between the folded top portion 121 and the unfolded top portion 122 can be arranged as a straight surface.

[0094] In other embodiments, as shown in Figures 15 to 19 The convex portion 111 and the accommodating portion 112 are provided with a recess 113 lower than the accommodating portion 112.

[0095] The battery 100 of the embodiment of the utility model, through the recess 113 lower than the containing portion 112 between the convex portion 111 and the containing portion 112, can provide containing space for the bending edge sealing, and further can contain wider protection plate 2, and the increase of the width of protection plate 2 helps to improve the current flowing through protection plate 2, avoids the problem of serious heating at this position.

[0096] Optionally, as shown in Figure 18 The shape of the recess 113 can be selected as a square inner recess, a triangular inner recess and a circular inner recess.

[0097] Optionally, the convex portion 111 and the containing portion 112 are inclined to form an inclined surface, and the side of the protection plate 2 opposite to the inclined surface has a matching surface consistent with the inclined direction of the inclined surface. In other embodiments, the transition surface 1112 between the convex portion 111 and the containing portion 112 can also be a right-angle surface, and the side of the protection plate 2 opposite to the right-angle surface is a straight surface adapted to the right-angle surface. That is, the shape of the transition surface 1112 is adapted to the shape of the end of the protection plate 2, avoiding the problem that the size of the protection plate 2 is limited due to the mismatch of the shapes of the protection plate 2 and the transition surface 1112, and further helping to fully utilize the size space of the containing portion 112. Therefore, it is helpful to increase the layout area of the protection plate 2.

[0098] As shown in Figure 15 and Figure 16 The corner of the side of the convex portion 111 away from the containing portion 112 in the third direction has a first chamfer 1111. For example, the first chamfer 1111 is arranged at the left side as shown in Figure 5 .

[0099] The battery 100 of the embodiment of the utility model, by arranging the first chamfer 1111 at the corner of the side of the convex portion 111 away from the containing portion 112 in the third direction, the chamfer structure arrangement can effectively disperse the stress at the sharp corner of the convex portion 111, prevent the problem that the shell 12 is easy to be broken when subjected to external pressure or impact due to the sharp corner, help to reduce the risk of electrolyte leakage, and increase the service life of the battery 100.

[0100] Optionally, the first chamfer 1111 can be one of a straight chamfer, an arc chamfer and an inclined chamfer.

[0101] As shown in Figures 1 to 3 The corner of the side of the convex portion 111 away from the containing portion 112 in the third direction has a first chamfer 1111. For example, the first chamfer 1111 is arranged at the left side as shown in Figure 5 .

[0102] The battery 100 of this embodiment of the invention, by having the lower edge of the sealing edge chamfer 1211 level with or higher than the upper surface of the protrusion 111, ensures that the sealing edge structure can fit tightly against the top area of ​​the corresponding protrusion 111 after the top sealing part 121 is bent, thereby saving unnecessary space occupied inside the electrical device. This helps to increase the volume of the bare cell 11, and further improves the density of the battery 100.

[0103] Furthermore, such as Figure 5 As shown, the distance between the lower edge of the edge-sealing chamfer 1211 and the upper end face of the protrusion 111 is X1, and X1 is less than 0.3mm. Therefore, by limiting the range of X1, it avoids the possibility that an excessively large X1 would prevent the bent top seal 121 from not fitting snugly against the top of the protrusion 111. This saves unnecessary space within the electrical equipment and helps increase the volume of the bare cell 11. Furthermore, it further improves the energy density of the battery 100.

[0104] like Figures 15 to 17 As shown, the bare cell 11 forms a receiving portion 112 and a corner portion on the side opposite to the protrusion 111 (e.g.) Figure 17 The right side shown has a second chamfer 1121. This prevents the sharp edges of the bare cell 11 from cracking upon impact. This helps reduce the risk of electrolyte leakage and increases the lifespan of the battery 100.

[0105] Optionally, the second chamfer 1121 can be one of a straight chamfer, an arc chamfer, and a bevel chamfer.

[0106] Accordingly, such as Figure 5 As shown, the upper edge of the unfolded top 122 is lower than or equal to the upper surface of the protrusion 111. This prevents the unfolded top 122 from bending when the folded top 121 is bent, as a bent unfolded top 122 would interfere with the installation of the protective plate 2. This improves the ease of installation of the protective plate 2.

[0107] Furthermore, such as Figure 5 As shown, the distance between the upper edge of the unfolded top 122 and the upper end face of the protrusion 111 is X2, which is less than 0.3mm. Similarly, to avoid an excessively large distance between the upper edge of the unfolded top 122 and the upper end face of the protrusion 111, the space enclosed by the folded top seal 121, the unfolded top 122, and the bare battery cell 11 cannot properly position the protection plate 2. Therefore, by limiting the range of X2, the protection plate 2 can be positioned effectively.

[0108] like Figure 1 , Figure 7 and Figure 8 As shown, the protrusion 111 is in a third direction (such as...)Figure 1 The length of the battery 100 in the X direction (which is the width direction) is A, the length of the receiving portion 112 in the third direction is B, and the width of the protection plate 2 is W, where B > L; in the first direction (e.g. Figure 1 In the Y direction shown (which is the height direction of the battery 100), the width of the receiving part 112 is C, and the width of the protection plate 2 is W, where C > W. In the second direction (e.g., Figure 1 In the Z direction (which is the thickness direction of the battery 100) shown, the depth of the receiving portion 112 is D, and the thickness of the protective plate 2 is H, where D>H. It can be understood that the size of the receiving portion 112 is larger than the size of the protective plate 2, thereby ensuring that the entire protective plate 2 can fall within the receiving portion 112.

[0109] In this embodiment of the present invention, the battery 100 avoids the problem of the protection plate 2 protruding outside the bare cell 11 and occupying the overall space of the battery 100, thus preventing any impact on the energy density of the battery 100. Therefore, the smaller size of the protection plate 2 compared to the size of the receiving portion 112 helps to further improve the energy density of the battery 100.

[0110] like Figure 10 As shown, the minimum distance between the protective plate 2 and the protrusion 111 is a1. If the protective plate 2 is a single flexible circuit board 22, a1 is 0mm to 2mm. If the protective plate 2 is a double flexible circuit board 22 (PFC, Flexible Printed Circuit), a1 is 3mm to 6mm.

[0111] The battery 100 of this utility model ensures that the FPC has a certain range of motion by limiting the distance a1 between the flexible circuit board 22 and the protrusion 111, thus preventing installation interference between the flexible circuit board 22 and the sealing structure.

[0112] Optionally, if the protection board 2 is a dual PFC, a1 can be 3mm, 4mm, 5mm or 6mm. If the protection board 2 is a single flexible circuit board 22, a1 can be 0mm, 1mm or 2mm.

[0113] On the same side in the third direction, the protective plate 2 is on the side away from the protrusion 111 ( Figure 10 The distance between the right side shown and the side of cell 1 is a2, where a2 is 3mm to 6mm.

[0114] The battery 100 of this embodiment of the invention limits the range of the distance a2 between the protection plate 2 and the side of the cell 1 on the side away from the protrusion 111. This avoids the problem of the protection plate 2 being too small due to an excessively large distance. If the protection plate 2 is too small, it will not be able to accommodate a conductive path of sufficient width and thickness, which will lead to an increase in resistance.

[0115] In addition, the size of the protection plate 2 is too small to 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 2 is improved, and the resistance effect of the protection plate 2 during conduction is reduced.

[0116] In the first direction, the distance between the upper end surface of the protection plate 2 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 2 and the inner wall surface of the accommodating portion 112 is b2, which is 0-1mm. Therefore, the problem of the protection plate 2 protruding out of the accommodating portion 112 and occupying the internal space of the electrical equipment can be avoided, so that a larger volume of bare battery core 11 can be accommodated without increasing the overall size of the electrical equipment, thereby realizing effective use of the overall space of the battery 100 and improving the density of the battery 100.

[0117] Optionally, b1 can be 0, 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm.

[0118] 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.

[0119] As shown in Figure 2 and Figure 20 The battery 100 of the embodiments of the present application further comprises a buffer layer 4, which is arranged between the edge sealing structure and the protection plate 2.

[0120] Optionally, the buffer layer 4 can be a foam or a silica gel pad. In order to protect the top of the bare battery core 11 from being impacted by the protection plate 2, a buffer such as a foam or a silica gel pad can be attached between the two.

[0121] In some embodiments, the battery 100 of the embodiments of the present application can further comprise an adhesive layer 5 arranged between the unfolded top 122 and the protection plate 2. For example, the adhesive layer 5 can be double-sided tape. It can not only play a fixing role, but also play a buffering and protecting function.

[0122] Optionally, the adhesive layer 5 and the buffer layer 4 can be integrated into one layer structure. For example, the adhesive layer 5 and the buffer layer 4 are integrated into a foam adhesive or double-sided tape.

[0123] The battery 100 of the embodiments of the present application further comprises an insulating sealing layer 6, which and the edge sealing structure and the area corresponding to the accommodating portion 112 are enclosed to form a protection plate cavity 3, and a part of the protection plate 2 is arranged in the protection plate cavity 3.

[0124] Optionally, the insulating seal 6 can be an adhesive layer or an adhesive tape seal.

[0125] 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 adhesive tape can be eliminated. Applying adhesive to the head of the battery 100, where the protection board 2 is placed, helps improve the overall structural reliability. Applying adhesive to the head of the battery 100 improves the overall structural reliability.

[0126] like Figure 20 As shown, during assembly, the top sealing adhesive layer 62, buffer layer 4, adhesive layer 5, protective plate 2, and head adhesive layer 61 can be installed in sequence.

[0127] The electrical equipment assembly of this embodiment includes a battery 100 according to any one of the above claims. Because the battery 100 has a receiving portion 112 at one end in a first direction, at least a portion of the protection plate 2 is housed within the receiving portion 112. Therefore, the battery 100 module of this embodiment has the advantages of high battery density and high ease of operation.

[0128] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0129] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0130] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0131] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relation, unless another definite limitation.For ordinary skilled person in the art, can understand the specific meaning of above terms in the utility model according to specific circumstances.

[0132] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can be that first and second features directly contact, or first and second features indirectly contact through intermediate medium.Moreover, first feature "over", "above" and "on" second feature can be that first feature is directly above or obliquely above second feature, or just indicates that the horizontal height of first feature is higher than that of second feature.First feature "under", "below" and "under" second feature can be that first feature is directly below or obliquely below second feature, or just indicates that the horizontal height of first feature is less than that of second feature.

[0133] In the utility model, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the skilled person in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0134] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model.The ordinary skilled person in the art can change, modify, replace and modify the above embodiments within the scope of the utility model.

Claims

1. A battery, characterized by, The battery comprises: an electric core having a receiving portion and a protruding portion at one end of the battery in a first direction; a protection plate, at least a portion of which is accommodated in the receiving portion, and one side of the protection plate having a groove in which a portion of a tab of the electric core is disposed.

2. The battery according to claim 1, wherein the electric core has a top surface and a side surface, the top surface having the receiving portion and the protruding portion, the side surface being at one end of the electric core in a second direction, the protection plate comprising a protection plate body and a flexible circuit board disposed on the protection plate body, the protection plate body being disposed in the receiving portion, one side of the protection plate body opposite to the side surface of the electric core being provided with the groove, and the second direction being perpendicular to the first direction.

3. The battery according to claim 2, wherein the tab of the electric core protrudes out of the electric core from the receiving portion; the protection plate body is provided with a conductive sheet on the side surface adjacent to the groove, the conductive sheet being opposite to the one end of the electric core, a portion of the tab is bent and placed in the groove, and the portion of the tab extending out of the groove is connected to the protection plate body through the conductive sheet.

4. The battery according to claim 2, wherein the flexible circuit board is disposed close to the protruding portion, and a width of the flexible circuit board is less than 1 / 2 of a width of the protection plate body; or, in a third direction, the flexible circuit board is disposed at one end of the protection plate body away from the protruding portion, and a corner portion of the electric core close to the flexible circuit board is a cut corner, and the second direction is perpendicular to each of the first direction and the third direction.

5. The battery according to claim 1, wherein the electric core comprises a shell and a bare electric core, the shell covering the bare electric core, the shell being provided with an edge sealing structure at the one end, at the one end of the bare electric core, one side of the bare electric core in a third direction protruding relative to the other side to correspond to the receiving portion and the protruding portion, a region of the edge sealing structure corresponding to the protruding portion being bent towards the bare electric core to form a folded top sealing portion, and the third direction being perpendicular to the first direction.

6. The battery according to claim 5, wherein a region of the edge sealing structure corresponding to the receiving portion extends in the first direction to form an unfolded top portion.

7. The battery according to claim 6, wherein the unfolded top portion is disposed lower than the folded top sealing portion, and a connection edge between the folded top sealing portion and the unfolded top portion has a projection in a second direction being one of an oblique angle line, a right angle line and a curved line, and the second direction is perpendicular to each of the first direction and the third direction.

8. The battery according to claim 5, wherein a transition surface between the protruding portion and the receiving portion is one of an inclined surface, a straight surface and a curved surface; or, a recess lower than the receiving portion is provided between the protruding portion and the receiving portion.

9. The battery according to claim 5, wherein ​ The corner of the protruding part on the side away from the accommodating part in the third direction has a first chamfer; And / or, the corner of the side of the electric core away from the protruding part and forming the accommodating part has a second chamfer.

10. The battery of claim 6, wherein, The corner of the sealing edge chamfer corresponding to the first chamfer of the bare electric core has a sealing edge chamfer, the lower edge of the sealing edge chamfer is flush with or higher than the upper end surface of the protruding part; And / or, the upper edge of the unturned top part is lower than or equal to the upper end surface of the protruding part.

11. The battery of claim 10, wherein, The distance between the lower edge of the sealing edge chamfer and the upper end surface of the protruding part is X1, X1 is less than 0.3 mm; And / or, the distance between the upper edge of the unturned top part and the upper end surface of the protruding part is X2, X2 is less than 0.3 mm.

12. An electrical device, characterized by A battery comprising any one of claims 1-11.

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