Battery pack and electric scooter

Abstract

The utility model provides a battery pack and an electric scooter, and relates to the technical field of scooters. The battery pack provided by the utility model can comprise a battery cell, a battery cell bracket, a circuit board and at least one busbar, wherein the battery cell bracket is provided with an accommodating space, and the battery cell is at least partially positioned in the accommodating space. The bus bar can comprise a first bus bar and a second bus bar, the first bus bar can comprise a first bending part, the second bus bar can comprise a second bending part, and the first bending part and the second bending part are used for ensuring that the first bus bar and the second bus bar play a role in damping when being vibrated and preventing the bus bars from being broken. The first bending part is of a convex structure, and the second bending part is of a groove structure, so that the first busbar and the second busbar can be arranged at different positions of the battery pack according to conditions, the design can be carried out according to actual parts of the battery pack, the volume of the battery pack is further reduced, and the miniaturization of a product is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of scooter, in particular to a battery pack and electric scooter. BACKGROUND

[0002] As the power source of electric scooter, the performance of battery pack is crucial to the use of electric scooter. The battery pack generally includes battery cell, circuit board and busbar, and the busbar is used for electrically connecting the battery cell and the circuit board. In the battery pack, the current of multiple battery cells is generally concentrated on one or several busbars and then connected with the circuit board. However, the busbar in the prior art is generally made of single metal material, which has weak current-carrying capacity. When the current is large, the temperature rises quickly, which may easily cause the busbar to be burnt out, thereby reducing the service life of the battery pack and even causing the battery pack to burn out and pose a danger. Therefore, in order to balance the cost and the performance of the busbar, different types of busbars can be designed. In addition, the battery pack will face a large number of external vibrations during use. Unavoidably, the vibration will change the distance between the circuit board and the battery cell, and the busbar as a connecting piece between the circuit board and the battery cell is prone to breakage due to external vibration. In order to avoid the breakage of the busbar, a bending part can be arranged between the battery cell and the circuit board of the busbar. The structure of the bending part of the existing busbar is consistent, so that the same bending part structure is used for different types of busbars, resulting in a large volume of the entire battery pack, which is not conducive to the miniaturization of the product. SUMMARY

[0003] One object of the first aspect of the utility model is to provide a battery pack to solve the problem of large volume of the battery pack due to the shock absorption structure of the busbar in the prior art.

[0004] Another object of the first aspect of the utility model is to solve the problem of weak current-carrying capacity of the busbar.

[0005] In particular, the utility model provides a battery pack, which comprises:

[0006] a battery cell;

[0007] a battery cell support having an accommodation space, the battery cell being at least partially located in the accommodation space,

[0008] a circuit board; and

[0009] at least one busbar, each busbar electrically connecting at least one battery cell and the circuit board; each busbar comprising a battery cell connecting part, a circuit board connecting part and a bending part, the battery cell connecting part and the circuit board connecting part being connected through the bending part;

[0010] The busbar includes a first busbar and a second busbar, the first busbar includes a first bending part, the first bending part is a convex structure protruding in a direction away from the battery cell support along a first preset direction, the second busbar includes a second bending part, the second bending part is a groove structure recessed in a direction close to the battery cell support along the first preset direction; wherein the first preset direction is the direction in which the axis of the battery cell extends.

[0011] Optionally, the plurality of battery cells are arranged along a second preset direction to form a first layer of battery cell groups, the circuit board is arranged spaced apart from the first layer of battery cell groups and located outside the first layer of battery cell groups;

[0012] The projection of the groove structure on the plane where the circuit board is located is between the projections of the axes of the adjacent two battery cells of the first layer of battery cells on the plane where the circuit board is located;

[0013] The projection of the convex structure on the plane where the circuit board is located intersects with the projection of the axis of at least one battery cell of the first layer of battery cell groups on the plane where the circuit board is located, and the second preset direction is the length direction of the circuit board.

[0014] Optionally, the plurality of battery cells are arranged along a third preset direction to form a plurality of columns of battery cell groups;

[0015] The first busbar connects a single column of the battery cell groups;

[0016] The second busbar connects two adjacent columns of the battery cell groups;

[0017] Wherein, the third preset direction is the thickness direction of the circuit board.

[0018] Optionally, a first size of the convex structure in the first preset direction is less than or equal to a second size of the convex structure in the third preset direction;

[0019] The ratio of the first size to the second size is 0.15-1.

[0020] Optionally, a third size of the groove structure in the first preset direction is greater than or equal to a fourth size of the groove in the third preset direction;

[0021] The ratio of the third size to the fourth size is 1-2.

[0022] Optionally, each first busbar is at least partially formed of a first metal and a second metal, and the first metal and the second metal are different in material.

[0023] Optionally, the thickness of the second busbar is less than the thickness of the battery cell connecting part of the first busbar.

[0024] Optionally, a protection plate is further included, which is connected with the circuit board and the cell holder through fasteners, and is located on a side of the circuit board away from the cell holder and covers the circuit board.

[0025] Optionally, at least one first through hole is arranged on the protection plate, and the circuit board is provided with a second through hole at a position corresponding to each first through hole, and the fasteners are connected at the cell holder after passing through the first through hole and the second through hole to connect the protection plate, the circuit board and the cell holder.

[0026] Optionally, at least one recess is arranged on the protection plate and recessed towards the circuit board, and at least one first through hole is arranged in each recess.

[0027] Optionally, the first through hole is arranged at a position close to the outer periphery of the protection plate.

[0028] Optionally, a protrusion is arranged on a side of the protection plate close to the circuit board, and the protrusion extends from the protection plate towards the circuit board.

[0029] Optionally, the density of the protrusion at a middle position of the protection plate is greater than the density of the protrusion at a peripheral position.

[0030] Optionally, the protrusion includes a reinforcing rib and a supporting rib, and the size of the supporting rib in a third preset direction is greater than the size of the reinforcing rib in the third preset direction.

[0031] Optionally, the cell holder is provided with a notch arranged at one end of the cell holder parallel to a second preset direction, a rubber plug is arranged at the notch, and one end of the protection plate is further provided with a limiting plate matched with the notch, and the limiting plate covers at least part of the notch.

[0032] In particular, the utility model provides a kind of electric skateboard, and the electric skateboard includes at least one battery pack described in any one of the above.

[0033] The battery pack of the scheme can include busbars, the busbars can include a first busbar and a second busbar, wherein the first busbar can include a first bending part, and the second busbar can include a second bending part, the design of the first bending part and the second bending part is mainly to ensure that the first busbar and the second busbar play a role in shock absorption when subjected to vibration, avoiding the fracture of the busbar. Specifically, the first bending part is a convex structure, and the second bending part is a groove structure, so that the first busbar and the second busbar can be arranged at different positions of the battery pack according to the situation, thereby the actual components of the battery pack can be designed, and the volume of the battery pack is reduced, which is beneficial to the miniaturization of the product.

[0034] The first busbar of the scheme is at least partially formed by the first metal and the second metal, thereby the overcurrent capacity of the first busbar is strong, a large current can be passed, the risk of damage of the busbar caused by excessive current is avoided, and the service life of the battery pack is improved, and the risk of burning of the battery pack is reduced.

[0035] The battery pack of the scheme can include a protection plate. The protection plate is fixedly connected with the circuit board and the cell support through fasteners, so that the protection plate transmits the external force to the cell support through the fasteners when the protection plate is subjected to the external force, thereby the rigidity of the protection plate is ensured, the circuit board is protected by the protection plate, short circuit, damage or breakage of the circuit board caused by external pressure during use is avoided, and the service life of the battery pack is affected.

[0036] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of the embodiments thereof, when considered in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0037] Some specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, which are exemplary and non-limiting. The same reference numerals in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0038] Figure 1 is a schematic structural view of a battery pack according to one specific embodiment of the present application;

[0039] Figure 2 is a partial structural exploded view of a battery pack according to one specific embodiment of the present application;

[0040] Figure 3 is a partial structural exploded view of a battery pack according to one specific embodiment of the present application;

[0041] Figure 4 is a partial enlarged schematic view of a battery pack according to one specific embodiment of the present application;

[0042] Figure 5 is a schematic structural view of the first busbar according to one specific embodiment of the present application;

[0043] Figure 6 is a partial schematic sectional view of the first busbar according to one specific embodiment of the present application;

[0044] Figure 7 is a partial schematic sectional view of the second busbar according to one specific embodiment of the present application;

[0045] Figure 8 is a partial schematic sectional view of the second busbar according to one specific embodiment of the present application;

[0046] Figure 9 is a schematic exploded view of the first busbar according to one specific embodiment of the present application;

[0047] Figure 10 is a partial structural schematic view of the battery pack according to one specific embodiment of the present application;

[0048] Figure 11 is a sectional view after being cut along the cutting line A-A in Figure 10 ; Figure 12 is a partial enlarged view of Figure 11 ;

[0049] Figure 13 is a schematic structural view of one angle of the protection plate according to one specific embodiment of the present application;

[0050] Figure 14 is a schematic structural view of another angle of the protection plate according to one specific embodiment of the present application;

[0051] Figure 15 is a partial exploded view of the battery pack according to one specific embodiment of the present application.

[0052] Explanation of reference signs:

[0053] Battery pack-100; battery cell-110; first layer battery cell group-111; battery cell group-112; battery cell support-120; through hole-121; second notch-122; first notch-123; first support-124; second support-125; circuit board-130; second through hole-131; bus bar-140; first bus bar-141; battery cell connecting part-1411; circuit board connecting part-1412; first bending part-1413; first metal-142; second metal-143; second bus bar-144; second bending part-1441; protection plate-150; protrusion-151; reinforcing rib-152; supporting rib-153; limiting plate-154; protruding block-155; first through hole-156; groove-157; rubber plug-160; insulation protection layer-170; first protection layer-171; second protection layer-172; second protection layer-172; fastener-180. DETAILED DESCRIPTION

[0054] In the description of the present embodiment, it should be understood that the terms "length", "width", "height", "upper", "lower", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model.

[0055] As a specific embodiment of the present utility model, as shown in the drawings, Figures 1-4 The present embodiment provides a battery pack 100, which can include a battery cell 110, a battery cell support 120, a circuit board 130 and at least one bus bar 140. The battery cell support 120 has an accommodation space, and the battery cell 110 is at least partially located in the accommodation space. Each bus bar 140 electrically connects the end of at least one battery cell 110 with the circuit board 130. Each bus bar of the present embodiment can include a battery cell connecting part 1411, a circuit board connecting part 1412 and a bending part, and the battery cell connecting part and the circuit board connecting part are connected through the bending part. The bus bar 140 can include a first bus bar 141 and a second bus bar 144, the first bus bar 141 can include a first bending part 1413, which is a protruding structure protruding away from the battery cell support 120 along a first predetermined direction, and the second bus bar 144 can include a second bending part 1441, which is a groove structure recessed towards the battery cell support 120 along the first predetermined direction x.

[0056] Each first busbar 141 of the embodiment can include a first cell connecting portion 1411, a first circuit board connecting portion 1412, and a first bending portion 1413, and the first cell connecting portion 1411 and the circuit board connecting portion 1412 are connected through the first bending portion 1413. The first cell connecting portion 1411 of the first busbar 141 is in contact with the end portion of the cell 110, and the first circuit connecting portion 1442 is connected with the circuit board 130. Similarly, each second busbar 144 can include a second bending portion 1441, a second cell connecting portion 1442, and a second circuit board connecting portion 1443, and the second cell connecting portion 1442 and the second circuit board connecting portion 1443 are connected through the second bending portion 1441. The second cell connecting portion 1442 of the second busbar 144 is in contact with the end portion of the cell 110, and the second circuit connecting portion 1443 is connected with the circuit board 130.

[0057] The busbar 140 of the embodiment can include a first busbar 141 and a second busbar 144, wherein the first busbar 141 can include a first bending portion 1413, and the second busbar 144 can include a second bending portion 1441, and the design of the first bending portion 1413 and the second bending portion 1441 is mainly to ensure that the first busbar 141 and the second busbar 144 play a role in shock absorption when subjected to vibration, avoiding the fracture of the busbar. Specifically, the first bending portion 1413 is a convex structure, and the second bending portion 1441 is a groove structure, so that the first busbar 141 and the second busbar 144 can be arranged at different positions of the battery pack 100 according to the situation, so that the battery pack 100 can be designed according to the actual components of the battery pack 100, thereby reducing the volume of the battery pack 100, which is beneficial to the miniaturization of the product.

[0058] As a specific embodiment of the utility model, Figure 2 and Figure 4 As shown in the drawings, the plurality of cells 110 of the embodiment are arranged along the second preset direction z to form a first layer of cell groups 111, and the circuit board 130 is arranged spaced apart from the first layer of cell groups 111 and located outside the first layer of cell groups 111. The projection of the groove structure on the plane where the circuit board 130 is located is located between the projections of the axes of the adjacent two cells 110 of the first layer of cell groups 111 and the plane where the circuit board 130 is located. The projection of the convex structure on the plane where the circuit board 130 is located intersects with the projection of the axis of at least one cell 110 of the first layer of cell groups 111 on the plane where the circuit board 130 is located; wherein the second preset direction z is the length direction of the circuit board 130.

[0059] Specifically, since the battery cell 110 of the embodiment is cylindrical, when the plurality of battery cells 110 are arranged, there is a certain space between the battery cells 110. The circuit board 130 is arranged on one side of the plurality of arranged battery cells 110, which causes the distance between the position between the two battery cells 110 and the circuit board 130 to be large, and the distance between the position of the axis of the battery cell 110 and the circuit board 130 to be small. In order to adapt to this structure, the protruding structure of the embodiment is arranged between the position of the axis of the battery cell 110 and the circuit board 130, and the groove structure is arranged at the position between the battery cell 110 and the circuit board 130, so that the gap between the battery cell 110 and the circuit board 130 can be well utilized, and the volume of the battery pack 100 is reduced.

[0060] As a specific embodiment of the utility model, the plurality of battery cells 110 of the embodiment are arranged along the third preset direction y to form a plurality of battery cell groups 112. The second bus bar 144 is connected to the two adjacent battery cell groups 112. The first bus bar 141 is connected to one of the battery cell groups 112. Among them, the third preset direction y is the thickness direction of the circuit board.

[0061] Specifically, the first bus bar 141 of the embodiment is connected at the single battery cell group 112, so that the first bending part of the first bus bar 141 can only be arranged between the axis position of the uppermost battery cell 110 and the circuit board 130, and the position between the uppermost battery cell 112 and the circuit board 130 is small, so that the first bending part 1413 can be designed as a protruding protruding structure. The second bus bar 144 is connected to the two adjacent battery cell groups 112, so that it can be connected to the circuit board 130 at the intermediate position of the two battery cell groups 112. Since there is enough space between the position between the battery cells 110 and the circuit board 130, the second bending part 1441 can be inwardly recessed. In this way, the overall volume of the battery pack is increased to set the inwardly recessed structure between the battery cell 110 and the circuit board 130.

[0062] Specifically, as shown in Figure 5 and Figure 6 The first dimension a of the protruding structure of the first bending part 1413 in the first preset direction x is less than or equal to the second dimension b of the protruding structure in the third preset direction y. Specifically, since the protruding structure protrudes outwardly, it is limited by the size of the battery cell support 120 of the battery pack 100, and the first dimension a in the first preset direction x is small. The design that the first dimension a of the protruding structure in the first preset direction x is less than or equal to the second dimension b in the third preset direction y is designed to make the protruding structure have better buffering effect.

[0063] More specifically, the ratio of the first dimension a to the second dimension b of the present embodiment is 0.15-1. For example, the ratio of the first dimension a to the second dimension b can be 0.15, 0.5, 0.75 or 1. Specifically, the ratio can be designed according to actual conditions.

[0064] More specifically, as shown in Figure 7 and Figure 8 , the second bending part 1413 is a groove structure, and due to the structural limitation of the battery pack 100, the third dimension c of the groove structure in the first preset direction x is greater than or equal to the fourth dimension d of the groove structure in the third preset direction y. Specifically, due to the limited gap size between the battery cell 110 and the circuit board 130, the fourth dimension d of the groove structure is limited, and the third dimension c of the groove structure in the first preset direction x is designed to be greater than or equal to the fourth dimension d in the third preset direction y, which can improve the buffering performance of the first busbar 141, and the larger the third dimension c, the better the buffering performance.

[0065] As a specific embodiment of the present application, the ratio of the third dimension c to the fourth dimension d of the present embodiment is 1-2. For example, the ratio of the third dimension c to the fourth dimension d can be 1, 1.3, 1.6 or 2. The specific ratio can be designed according to actual conditions.

[0066] Specifically, as shown in Figure 9 , the second busbar 144 of the present embodiment can be a busbar made of a metal material. And the first busbar 141 is at least partially formed by the first metal 142 and the second metal 143, so that the first busbar 141 has strong current-carrying capacity and can pass through a large current, avoiding the risk of damage to the busbar 140 caused by excessive current, thereby improving the service life of the battery pack 100 and reducing the risk of burning the battery pack 100.

[0067] Specifically, the materials of the first metal 142 and the second metal 143 of the present embodiment can be selected from copper, aluminum, nickel, silver, etc. The first metal 142 and the second metal 143 can be combined together by welding, riveting, bonding or the like. And the first metal 142 and the second metal 143 are all or partially combined together.

[0068] As a specific embodiment of the present application, as shown in Figure 2 and Figure 3 , the present embodiment can further include at least one second busbar 144 on each side of the battery cell support 120 in the first preset direction x, and the thickness of the second busbar 144 is less than the thickness of the cell connecting part 1411 of the first busbar 141.

[0069] Specifically, each side of the first preset direction x of the battery cell support 120 can also include a second bus bar 144, the thickness of the second bus bar 144 is less than the thickness of the first bus bar 141, and the second bus bar 144 is used to pass a small current.

[0070] More specifically, the battery cell support 120 of the embodiment is provided with the first bus bar 141 and the second bus bar 144 on both sides of the first preset direction x, wherein the first bus bar 141 is a double-layer structure, and the second bus bar 144 is a single-layer structure. The number of the first bus bar 141 and the second bus bar 144 on each side can be designed according to the situation. For example, the number of the second bus bar 144 on each side of the battery cell support 120 in the embodiment is 6, and the first bus bar includes 1. The first bus bar 141 is located at the end position. The six second bus bars 144 pass a small current, and the first bus bar 141 passes a large current. The structure of the first bus bar 141 and the second bus bar 144 matches the shape and arrangement of the battery cell and the shape of the battery cell support, and can be designed according to the situation.

[0071] Specifically, the material of the second bus bar 144 is selected from nickel, copper, aluminum, steel nickel, silver, etc., and is selected according to the need.

[0072] As a specific embodiment of the utility model, Figure 2 , Figure 10 , Figure 11 and Figure 12 As shown in the embodiment, the battery pack 100 can also include a protection plate. The protection plate 150 is located on the side of the circuit board 130 away from the battery cell support 120 and covers the circuit board 130.

[0073] Specifically, the battery pack 100 of the embodiment can include a battery cell 110, a battery cell support 120, a circuit board 130, at least one bus bar 140, and a protection plate 150. The protection plate 150 is fixedly connected with the circuit board 130 and the battery cell support 120 through fasteners, so that when the protection plate is subjected to external force, the force is transmitted to the battery cell support 120 through the fasteners 180, thereby ensuring the rigidity of the protection plate 150. The protection plate 150 is used to protect the circuit board 130, so as to avoid short circuit, damage or breakage of the circuit board 130 due to external pressure during use, and affect the service life of the battery pack 100.

[0074] Specifically, the battery cell support 120 of the embodiment has at least one through hole 121 that communicates the accommodating space with the outside of the battery cell support 120, and the circuit board 130 is located on the side of the third preset direction x parallel to the battery cell support 120. Among them, the first preset direction x is parallel to the axis of the battery cell 110.

[0075] As a specific embodiment of the utility model, Figure 12As shown in the drawings, the protective plate 150 of the embodiment is provided with at least one first through hole 156, the circuit board 130 is provided with a second through hole 131 at a position corresponding to each first through hole 156, and the fastener 180 is connected at the battery cell support 120 after passing through the first through hole 156 and the second through hole 131 to connect the protective plate 150, the circuit board 130 and the battery cell support 120.

[0076] Specifically, the first through hole 156 and the second through hole 131 are respectively arranged at the protective plate 150 and the circuit board 130 in the embodiment, and then the fastener 180 is connected with the battery cell support 120 by passing through the first through hole 156 and the second through hole 131, so that the protective plate 150 and the circuit board 130 can be connected with the battery cell support 120, and the deformation of the protective plate 150 and the circuit board 130 caused by the fastener 180 directly fastened from the protective plate 150 and the circuit board 130 is avoided.

[0077] More specifically, as shown in the drawings, Figure 10 and Figure 11 the first through hole 156 of the embodiment is arranged at a position close to the outer periphery of the protective plate 150.

[0078] Specifically, the position of the groove 157 is also at a position close to the outer periphery of the protective plate 150. Preferably, a plurality of grooves 157 are arranged at a position of the outer periphery of the protective plate 150, and at least one first through hole 156 is arranged in each groove 157, so that the rigidity of the protective plate 150 can be ensured, and the damage of the circuit board 130 caused by the folding of the protective plate 150 under external force can be avoided. Specifically, as shown in the drawings, Figure 13 the protective plate 150 of the embodiment is provided with a protrusion 151 close to the circuit board 130, and the protrusion 151 extends from the protective plate 150 to the circuit board 130. In a non-stressed state, the protrusion 151 does not contact the circuit board 130.

[0079] The protrusion 151 arranged at the side of the protective plate 150 close to the circuit board 130 in the embodiment can increase the strength and rigidity of the protective plate 150, and thus better protect the circuit board 130.

[0080] As a specific embodiment of the utility model, the protrusion 151 of the embodiment can include a reinforcing rib 152 and a supporting rib 153, and the size of the supporting rib 153 in the third preset direction y is greater than the size of the reinforcing rib 152 in the third preset direction y; wherein the third preset direction y is the thickness direction of the protective plate 150.

[0081] Specifically, the protrusions 151 of the present embodiment can include reinforcing ribs 152 and supporting ribs 153, both of which can play a role in reinforcing the rigidity of the protection plate 150. The reinforcing ribs 152 and the supporting ribs 153 have different main roles, the reinforcing ribs 152 mainly play a role in reinforcing the rigidity of the protection plate 150, and the supporting ribs 153 mainly play a role in supporting the protection plate 150. Specifically, the size of the supporting ribs 153 in the third preset direction y is greater than that of the reinforcing ribs 152. When the protection plate 150 and the circuit board 130 are both installed on the battery cell support 120, the supporting ribs 153 abut on the circuit board 130. Specifically, the structure and shape of the supporting ribs 153 are affected by the position of the electronic device on the circuit board 130, and the electronic device is arranged on the side of the supporting ribs 153.

[0082] As a specific embodiment of the present application, the protrusions 151 of the present embodiment can be one or more combinations of point-shaped protrusions, strip-shaped protrusions, block-shaped protrusions or grid-shaped protrusions. Specifically, the structure and direction of the protrusions 151 are designed according to actual conditions. The protrusions 151 in the present embodiment are grid-shaped protrusions, and specifically are honeycomb-shaped.

[0083] As a specific embodiment of the present application, as shown in Figure 3 The battery cell support 120 of the present embodiment is provided with a second notch 122 (as shown in Figure 3 The second notch 122 is arranged at one end of the battery cell support 120 in the second preset direction z. A rubber plug 160 is arranged at the second notch 122. One end of the protection plate 150 is also provided with a limiting plate 154 (as shown in Figure 3 The limiting plate 154 covers at least part of the position of the second notch 122. Among them, the second preset direction z is the length direction of the protection plate 150.

[0084] Specifically, the battery cell support 120 of the present embodiment is provided with a second notch 122 at one end in the second preset direction z, and a rubber plug 160 is arranged at the second notch 122. The rubber plug 160 is mainly used for concentrating and outputting the electric wire, which is used for connecting the circuit board 130 and the external components. Since the rubber plug 160 is arranged at the second notch 122, there is also an opening above. One end of the protection plate 150 of the present embodiment is provided with a limiting plate 154 matched with the second notch 122. After arranging the limiting plate 154 at the second notch 122, the rubber plug 160 is limited, and at the same time, the opening above the second notch 122 is blocked, thereby increasing the waterproof performance. Further, in order to ensure the waterproof performance at this position, the limiting plate 154 and the rubber plug 160 can be sealed by using sealing glue after being arranged at the second notch 122.

[0085] As a specific embodiment of the present application, as shown in Figure 3As shown, the battery cell support 120 of the embodiment is provided with at least one first notch 123 on both sides in the first preset direction x. The edge of the protection plate 150 is provided with a protrusion 155 matched with the first notch 123. The protrusion 155 covers at least part of the position of the first notch 123.

[0086] Specifically, the first notch 123 is arranged on both sides of the battery cell support 120 in the first preset direction x, and the main purpose of the first notch 123 is to enable the bus bar 140 to electrically connect the end of the battery cell 110 with the circuit board 130. Due to the presence of the first notch 123, a height difference is formed between the battery cell support 120 and the first notch 123, which is easy to cause damage to the subsequent soft packaging film. The embodiment is provided with the protrusion 155 matched with the first notch 123 on the edge of the protection plate 150, and the protrusion 155 covers the first notch 123, thereby reducing the damage to the subsequent soft packaging film.

[0087] As a specific embodiment of the utility model, the outer edge of each protrusion 155 of the embodiment is chamfered, and the outer edge of the protrusion 155 does not exceed the outer surface of the battery cell support 120.

[0088] Specifically, the outer edge of the protrusion 155 of the embodiment is chamfered, which can further reduce the damage of the protrusion edge to the soft film packaging. In addition, the outer edge of the protrusion 155 does not exceed the outer surface of the battery cell support 120, which is also to avoid the protrusion 155 protruding from the outer surface of the battery cell support 120 to cause damage to the soft film packaging. Preferably, the outer edge of the protrusion 155 is in the same plane as the outer surface of the battery cell support 120.

[0089] As a specific embodiment of the utility model, the battery cell support 120 of the embodiment can include a first support 124 and a second support 125, and the first support 124 and the second support 125 are mutually buckled to form an accommodating space.

[0090] As a specific embodiment of the utility model, as shown, Figure 15 As shown, the battery pack 100 of the embodiment can further include an insulating protective layer 170, and the insulating protective layer 170 covers the battery cell support 120, the bus bar 140 and the protection plate 150.

[0091] Specifically, the embodiment is provided with the insulating protective layer 170 (as shown in Figure 15 on the battery cell support 120, the bus bar 140 and the protection plate 150, which can waterproof, insulate and prevent friction of the battery cell 110, the circuit board 130 and the bus bar 140, and avoid short circuit of the battery pack 100 in the production process.

[0092] As a specific embodiment of the utility model, the insulating protective layer 170 of the embodiment can include a first protective layer 171, the first protective layer 171 at least partially covers both sides of the first preset direction x of the battery cell support 120.

[0093] Specifically, the first protective layer 171 of the embodiment can be a highland barley paper, which mainly plays an insulating role to prevent the current of the busbar 140 from being conducted with the external current.

[0094] As a specific embodiment of the utility model, the insulating protective layer 170 of the embodiment can further include a second protective layer 172, the second protective layer 172 at least partially covers the first protective layer 171, the battery cell support 120 and the protective plate 150.

[0095] Specifically, the second protective layer 172 of the embodiment can be a thermoplastic sleeve, which can shrink and coat the internal structure under heating, and isolate the internal structure from the outside, thereby playing a waterproof function.

[0096] As a specific embodiment of the utility model, the insulating protective layer 170 of the embodiment can further include a third protective layer 173, the third protective layer 173 at least partially covers the second protective layer 172 and is located at both ends of the second preset direction z of the battery cell support 120.

[0097] Specifically, the third protective layer 173 of the embodiment can be waterproof foam. The third protective layer 173 can partially cover the second protective layer 172 and be located at both ends, which plays a waterproof role together with the second protective layer 172.

[0098] As a specific embodiment of the utility model, the specific structure and connection relationship of the battery pack 100 of the embodiment are as follows:

[0099] The first support 124 and the second support 125 are mutually buckled to form the cell support 120. The first support 124 and the second support 125 are both provided with a through hole 121. After the cell 110 is installed in the accommodation space, the end of the cell 110 is located at the through hole 121, and the end of the cell 110 is in communication with the outside. The circuit board 130 is connected above the cell support 120. The bus bar 140 is arranged outside the through hole 121 of each cell support 120, and the bus bar 140 extends to the circuit board 130 after passing through the first notch 123 of the end of the cell 110. One first bus bar 141 and six second bus bars 144 are arranged on the front and back sides of the cell support 120, respectively. The first bus bar 141 located on the front side is located on the rightmost side, and the first bus bar 141 located on the back side is located on the leftmost side. The small current of the cell 110 is conducted to the circuit board 130 through the six second bus bars 144, and the large current of the side is conducted to the circuit board 130 through the first bus bar 141. The first bending part 1413 of the first bus bar 141 is a convex structure, and the second bending part 1441 of the second bus bar 144 is a groove structure.

[0100] The left sides of the first support 124 and the second support 125 are both provided with an L-shaped notch, and the two notches are combined to form the second notch 122 after the first support 124 and the second support 125 are buckled. The wire is led out from the circuit board 130, passes through the rubber plug 160, and is connected with the outside. The rubber plug 160 is clamped at the second notch 122, the protection plate 150 is connected with the cell support 120, the limiting plate 154 is clamped at the second notch 122, and the rubber plug 160 is limited. After the protection plate 150 is connected with the cell support 120, the protrusions on the front and back sides of the protection plate 150 extend to the first notch 123. A layer of highland barley paper (i.e. a first protection layer 171) is covered on the front and back sides of the cell support 120 which has the bus bar 140, and a layer of thermoplastic sleeve film (i.e. a second protection layer 172) is arranged outside the entire cell support 120, the circuit board 130, the protection plate 150 and the first protection layer 171. A layer of waterproof foam (i.e. a third protection layer 173) is arranged on the left and right sides of the thermoplastic sleeve film, so that a complete battery pack 100 is formed.

[0101] As a specific embodiment of the utility model, the embodiment provides an electric scooter, which can include at least one battery pack 100 described above.

[0102] At this point, those skilled in the art should realize that, although the utility model has been shown and described in detail herein, many other variants or modifications conforming to the principles of the utility model can be directly determined or deduced according to the disclosure of the utility model without departing from the spirit and scope of the utility model. Therefore, the scope of the utility model should be understood and recognized as covering all these other variants or modifications.

Claims

1. A battery pack, characterized in that, include: Battery cell; A cell support having a receiving space, wherein at least a portion of the cell is located within the receiving space. Circuit board; and At least one busbar, each busbar electrically connecting at least one of the battery cells to the circuit board; each busbar includes a battery cell connection portion, a circuit board connection portion, and a bend portion, wherein the battery cell connection portion and the circuit board connection portion are connected through the bend portion; The busbar includes a first busbar and a second busbar. The first busbar includes a first bend, which is a protruding structure that protrudes away from the cell support along a first preset direction. The second busbar includes a second bend, which is a recessed structure that is recessed towards the cell support along the first preset direction. The first preset direction is the direction in which the axis of the cell extends.

2. The battery pack according to claim 1, characterized in that, Multiple battery cells are arranged along a second preset direction to form a first layer of battery cells. The circuit board is arranged at intervals with the first layer of battery cells and is located outside the first layer of battery cells. The projection of the groove structure on the plane of the circuit board is located between the projections of the axes of two adjacent cells of the first layer of cells on the plane of the circuit board. The projection of the protrusion structure onto the plane of the circuit board intersects with the projection of the axis of at least one of the cells of the first layer of the cell group onto the plane of the circuit board, wherein the second preset direction is the length direction of the circuit board.

3. The battery pack according to claim 2, characterized in that, The multiple battery cells are arranged along a third preset direction to form multiple rows of battery cell groups; The first busbar connects to a single column of the battery cell group therein; The second busbar connects two adjacent rows of the battery cells; The third preset direction is the thickness direction of the circuit board.

4. The battery pack according to claim 1, characterized in that, The first dimension of the protrusion structure in the first preset direction is less than or equal to the second dimension of the protrusion structure in the third preset direction; The ratio of the first dimension to the second dimension is 0.15 to 1.

5. The battery pack according to claim 3, characterized in that, The third dimension of the groove structure in the first preset direction is greater than or equal to the fourth dimension of the groove in the third preset direction; The ratio of the third dimension to the fourth dimension is 1 to 2.

6. The battery pack according to claim 1, characterized in that, The thickness of the second bus is less than the thickness of the cell connection portion of the first bus.

7. The battery pack according to any one of claims 1-6, characterized in that, It also includes a protection plate, which is connected to the circuit board and the cell support by fasteners. The protection plate is located on the side of the circuit board away from the cell support and covers the circuit board.

8. The battery pack according to claim 7, characterized in that, The protection plate is provided with at least one first through hole, and the circuit board is provided with a second through hole at a position corresponding to each of the first through holes. The fastener passes through the first through hole and the second through hole and is connected to the cell bracket to connect the protection plate, the circuit board and the cell bracket.

9. The battery pack according to claim 8, characterized in that, The protective plate is provided with at least one groove recessed towards the circuit board, and each groove is provided with at least one first through hole.

10. The battery pack according to claim 8, characterized in that, The first through hole is located near the outer periphery of the protective plate.

11. The battery pack according to claim 7, characterized in that, The protective plate has a protrusion on the side near the circuit board, and the protrusion extends from the protective plate toward the circuit board.

12. The battery pack according to claim 9, characterized in that, The density of the protrusions located in the middle of the protective plate is greater than the density of those located at the periphery.

13. The battery pack according to claim 9, characterized in that, The protrusion includes a reinforcing rib and a supporting rib, wherein the dimension of the supporting rib in the third preset direction is greater than the dimension of the reinforcing rib in the third preset direction.

14. The battery pack according to claim 7, characterized in that, The cell support is provided with a notch, which is located at one end of the cell support parallel to a second preset direction; a rubber plug is provided at the notch; a limiting plate that cooperates with the notch is also provided at one end of the protection plate, and the limiting plate covers at least a portion of the notch.

15. An electric scooter, characterized in that, It includes at least one battery pack according to any one of claims 1-14.

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