CN217740732U - Battery pack and electric equipment - Google Patents

Abstract

The embodiment of the application relates to the technical field of battery devices, and particularly discloses a battery pack and electric equipment, which comprise: the power core assembly, coupling assembling and casing. The electric core component is at least partially arranged in the shell, the electric core component comprises a plurality of electric cores, the electric cores are electrically connected with one another, each electric core comprises an electric core shell, an electrode assembly and an electrode, the electrodes are connected to the electrode assembly, each electrode comprises a first electrode and a second electrode which are opposite in polarity, the connecting component is electrically connected with the electric core component, the component comprises a first insulating component, a second insulating component and a conductive component, the conductive component is at least partially arranged between the first insulating component and the second insulating component along a first direction, the first insulating component is provided with a first opening, the shell comprises a first wall and a first through hole, the first through hole penetrates through the first wall, the projection of the first opening, the projection of the conductive component, the projection of the first through hole and the projection of the second electrode are overlapped along the first direction. Through the mode, the battery core sampling device is beneficial to sampling the battery core and saving space.

Description

Battery pack and electric equipment

Technical Field

The embodiment of the application relates to the technical field of battery devices, in particular to a battery pack and electric equipment.

Background

At present, the power lithium battery industry develops very rapidly, and the application of the power lithium battery industry is expanded to the fields of electric equipment such as electric buses, electric cars, micro buses and energy storage. Wherein, for guaranteeing the normal safe handling of group battery, often need set up coupling assembling and collect, sample and conduct the electric core voltage of group battery, the more sampling line of the prior art common use quantity samples, occupies more group battery inner space.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide a battery pack and an electric device, which improve the problem of occupying the internal space of the battery pack due to a large number of sampling lines.

According to an aspect of embodiments of the present application, there is provided a battery pack including a case, a core assembly, and a connection assembly. The battery core assembly comprises a plurality of battery cores, the battery cores are electrically connected with one another, each battery core comprises a battery core shell, an electrode assembly and electrodes, the electrodes are connected to the electrode assembly, each electrode comprises a first electrode and a second electrode which are opposite in polarity, the connecting assembly is electrically connected with the battery core assembly, the connecting assembly comprises a first insulating piece, a second insulating piece and a conducting piece, at least part of the conducting piece is located between the first insulating piece and the second insulating piece along a first direction, the first insulating piece is provided with a first opening, the shell is provided with a first space, the battery core assembly is at least partially located in the first space, the shell comprises a first wall and a first through hole, the first through hole penetrates through the conducting piece and is observed along the first direction, at least part of the second electrode is located in the first through hole along the first direction, the connecting part is located between the connecting portion and the first insulating piece, and along the first direction, the projection of the first opening, the projection of the first through hole and the projection of the second electrode overlap. The electric core at the corresponding position can be sampled by utilizing the conductive piece, and the occupation of the internal space of the battery pack is reduced.

In an optional manner, the first electrode includes a first connection portion, the second electrode includes a second connection portion, the first connection portion and the second connection portion are respectively located at two opposite ends of the battery cell, and the first connection portion protrudes out of the battery cell casing, or the first connection portion and the second connection portion are located at the same end of the battery cell, and the first connection portion protrudes out of the second connection portion along a direction opposite to the first direction.

In an alternative mode, along the first direction, the projection of the second connecting portion is disposed around the outer side of the projection of the first connecting portion.

In an alternative mode, the conductive member is connected to the second connection portion.

In an alternative form, the battery pack includes a plurality of busbars disposed on a side of the first wall remote from the cell assembly, one of the busbars being connected to the first and/or second electrodes of the adjacent cells. The busbar is used for connecting two adjacent electric cores.

In an alternative form, the at least one busbar is connected to the first and second electrodes in a manner that includes one of: a) one busbar is connected to the first electrode of one cell and to the first electrode of another, b) one busbar is connected to the second electrode of one cell and to the second electrode of another, c) one busbar is connected to the first electrode of one cell and to the second electrode of another, d) one busbar is connected to the second electrode of one cell and to the first electrode of another, adjacent cell.

In an alternative form, the first wall is provided with a second through hole, and the first connection portion is at least partially located in the second through hole as viewed in the first direction. The second through hole is convenient for the electrical connection between the busbar and the electric core component.

In an optional manner, the second connection portion includes a first region, the first wall is provided with a third through hole, and when viewed in the first direction, the first region is at least partially located in the third through hole, in two adjacent battery cells, one end of the busbar is connected to the first connection portion of one of the battery cells, and the other end of the busbar is connected to the first region of the other battery cell.

In an alternative, the first region is located within the third through hole, viewed in the first direction.

In an alternative mode, the second connection portion includes a second area, the second area of one of the battery cells is located between the first connection portion of the battery cell and the first area of the other battery cell in two adjacent battery cells, and the first wall covers the second area of the one of the battery cells when viewed in the first direction.

In an alternative form, the first wall includes a first portion and a second portion, the first through hole being located in the first portion, the second through hole and the third through hole being located in the second portion, and the second portion protruding from the first portion in a direction opposite to the first direction.

In an alternative form, the connection assembly is provided on the first part.

In an alternative form, the connection assembly is provided with a connection opening, and the first part is provided with a first projection, which is located within the connection opening. The connection opening is connected with the first protrusion, thereby restricting the connection assembly from moving relative to the housing.

In an optional manner, the conductive component includes a plurality of conductive metal components, the conductive metal components are sequentially disposed at intervals along a second direction, and the lengths of the conductive metal components are sequentially decreased along a third direction, where the third direction is perpendicular to the first direction and the second direction.

In an optional manner, the conductive component includes a plurality of conductive metal components, the conductive metal components are sequentially arranged at intervals along the second direction, each conductive metal component includes a first section and a second section which are separated from each other, the first section is connected to the connecting portion, and the second section is not electrically connected to the core component.

In an optional manner, the battery pack includes a circuit board disposed in the first space, one end of the conductive member is connected to the connection portion, and the other end of the conductive member is connected to the circuit board. The circuit board can be used for stabilizing the voltage of the battery pack and protecting the battery pack from working normally.

In an alternative manner, the circuit board includes a Battery Management System (BMS) board, and the BMS board can be used to control the charging and discharging of the Battery cells.

In an alternative mode, the housing includes a fourth through hole penetrating through the first wall, and the other end of the conductive member passes through the fourth through hole to be connected to the circuit board. The fourth through hole is convenient for the connecting component to be connected with the circuit board.

In an alternative mode, along the first direction, the projection of the circuit board and the projection of the battery cell are separated from each other.

In an optional manner, the plurality of battery cells are sequentially arranged along a third direction, and along the third direction, the projection of the circuit board overlaps the projection of the battery cells.

In an alternative form, the first insulating member is closer to the first wall than the second insulating member along the first direction.

In an optional manner, the first wall includes a partition portion disposed between the third through hole and the second through hole, the third through hole, the partition portion, and the second through hole are sequentially disposed along a third direction, and the third direction is perpendicular to the first direction.

In an optional manner, the battery pack further includes a third insulating member provided on an outer surface of the case, the third insulating member covering the bus bar and the connection assembly.

In an alternative mode, the second insulating member is provided with a second opening, and along the first direction, a projection of the first opening, a projection of the second opening, a projection of the conductive member, a projection of the first through hole, and a projection of the first electrode/the second electrode overlap.

In an alternative mode, the connection assembly is used for collecting at least one of voltage, current or temperature of the battery cell.

According to another aspect of the embodiments of the present application, there is provided a powered device including the battery pack as described above.

The embodiment of the application is provided with an electric core assembly, a connecting assembly and a shell. The battery pack comprises a plurality of battery cells, the battery cells are electrically connected with one another, each battery cell comprises a battery cell shell, an electrode assembly and an electrode, the electrodes are connected to the electrode assembly and extend out of the battery cell shell, each electrode comprises a first electrode and a second electrode which are opposite in polarity, the connecting assembly is electrically connected with the battery cell assembly, each connecting assembly comprises a first insulating piece, a second insulating piece and a conducting piece, at least part of the conducting piece is located between the first insulating piece and the second insulating piece along a first direction, each first insulating piece is provided with a first opening, the shell is provided with a first space, the battery cell assembly is at least partially located in the first space, the shell comprises a first wall and a first through hole, the first through hole penetrates through the first conducting piece and is observed along the first direction, at least part of each second electrode is located in the first through hole, in addition, along the first direction, the projection of the first opening, the projection of the first through hole, the projection of the second through hole and the second electrode are overlapped, the battery cell can occupy less space inside the battery pack, and the battery cell can be used for sampling.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic view of an assembly structure of a battery pack according to an embodiment of the present application;

fig. 2 is an exploded view schematically illustrating a part of the structure of a battery pack according to an embodiment of the present application;

fig. 3 is an exploded view schematically illustrating a part of the structure of a battery pack according to an embodiment of the present application;

fig. 4 is an exploded view illustrating a structure of a case of a battery pack according to an embodiment of the present application;

fig. 5 is a partially structural assembly schematic view of a battery pack according to an embodiment of the present application;

fig. 6 is a partial cross-sectional view of a first housing of a battery pack according to an embodiment of the present application;

fig. 7 is an angle schematic diagram of a first housing of a battery pack according to an embodiment of the present application;

fig. 8 is a partially assembled structural view of a battery pack according to an embodiment of the present application;

fig. 9 is a partially assembled structural view of a battery pack according to an embodiment of the present application;

fig. 10 is a partial sectional view of a second case of the battery pack of the embodiment of the present application;

fig. 11 is a partially structural assembly diagram of a battery pack according to the embodiment of the present application;

fig. 12 is a schematic view illustrating an internal structure of a cell of a battery pack according to an embodiment of the present application;

fig. 13 is an assembly view showing still another partial structure of the battery pack according to the embodiment of the present application;

fig. 14 is a schematic diagram of a single cell structure of a battery pack according to an embodiment of the present application;

fig. 15 is a schematic view illustrating the assembly of still another part of the structure of the battery pack according to the embodiment of the present application;

fig. 16 is an exploded perspective view of a connection module of a battery pack according to still another embodiment of the battery pack of the present application;

fig. 17 is an exploded schematic view of a connection assembly of another embodiment of a battery pack of the present application;

fig. 18 is an exploded view schematically illustrating still another structure of a battery pack according to an embodiment of the present application;

fig. 19 is a schematic assembly view of a circuit board and connection assembly of a battery pack according to an embodiment of the present application;

fig. 20 is a flowchart of an assembly process of the battery pack according to the embodiment of the present application.

Detailed Description

In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The technical features mentioned in the embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

For better explanation of the structure of the battery pack, the structure of the battery pack will be described with reference to X, Y, and Z coordinate axes, where the X, Y, and Z coordinate axes are perpendicular to each other, the first direction is a positive direction of the X axis, the second direction is a positive direction of the Y axis, and the third direction is a positive direction of the Z axis.

Referring to fig. 1 and 2, the battery pack 01 includes a case 10, a battery cell assembly 20, and a connecting assembly 30. Wherein, the electric core assembly 20 is at least partially arranged in the housing 10, and the connecting assembly 30 is connected with the electric core assembly 20. The connection assembly 30 is used for collecting, sampling and transmitting at least one of voltage, current or temperature of the cells in the cell assembly 20.

The battery pack further includes a plurality of bus bars 40, a circuit board 50, a first conductive sheet 60, and a second conductive sheet 70. The bus bar 40 is disposed on the outer sidewall of the housing 10, the bus bar 40 is electrically connected to the electric core assembly 20, the circuit board 50 is disposed inside the housing 10, and the circuit board 50 is utilized by the first conductive sheet 60 and the second conductive sheet 70 and the electric core assembly 20.

The battery pack further includes a third insulator 80, and the third insulator 80 is covered on the outer surface of the case 10. The third insulator 80 may serve to seal the housing 10 while reducing contact of the busbar 40 and the connecting assembly 30 with external components.

Specifically, as for the housing 10, as shown in fig. 3 and fig. 4, the housing 10 is provided with a first space (not labeled), the housing 10 includes a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 are fixed, and the first housing 11 and the second housing 12 enclose to form the first space. The first space can be used for accommodating the above-mentioned electric core assembly 20.

As for the first housing 11, as shown in fig. 4 and 5, the first housing 11 includes a first wall 111, the first wall 111 is provided with a first through hole 1111, the first through hole 1111 penetrates the first wall 111, and the first through hole 1111 facilitates the connection of the core module 20 and the connection assembly 30. The first housing 11 further includes a third sidewall 11b and a fourth sidewall 11c disposed oppositely, and a fifth sidewall 11d and a sixth sidewall 11e disposed oppositely, wherein the second direction Y is a direction in which the third sidewall 11b and the fourth sidewall 11c are disposed oppositely, and the third direction Z is a direction in which the fifth sidewall 11d and the sixth sidewall 11e are disposed oppositely. The third side wall 11b, the fifth side wall 11d, the fourth side wall 11c and the sixth side wall 11e are sequentially connected and enclose the first wall 111 to form a first housing space 11a.

In some embodiments, the first housing 11 is provided with a plurality of first recesses 113, the plurality of first recesses 113 are communicated with the first housing space 11a, and the plurality of first recesses 113 are located at one side of the first wall 111 close to the electric core assembly 20. Each first concave portion 113 is used for placing a first end of a battery cell 21 of the battery cell assembly 20, so that the limitation on one battery cell 21 is realized, and the relative displacement between the battery cell 21 and the housing 10 in the first space is reduced.

In some embodiments, the shape of the first concave portion 113 is not limited to a circular shape, and may be other shapes, and the shape of the first concave portion 113 may be set according to the shape of the actual battery cell 21, for example: when the battery cell 21 is a rectangular parallelepiped, the first concave portion 113 may be set to be rectangular. Simultaneously, first concave part 113 is not restricted to be located in first casing space 11a, first concave part 113 can be the well cavity of a cylinder or cuboid, the one end of cylinder or cuboid is fixed in the tank bottom of first casing space 11a, a cylinder or cuboid are located in the first space, the well cavity of a cylinder or cuboid can wrap up or partly wrap up one electricity core 21, it is right to realize electricity core 21's location.

In some embodiments, the cells 21 include one of cylindrical cells or square cells.

In some embodiments, the first end of the battery cell 21 is provided with both the positive electrode and the negative electrode, i.e., the positive electrode and the negative electrode of the battery cell 21 are located on the same side.

As shown in fig. 5 and 6, in some embodiments, the inner side of the fifth sidewall 11d is provided with a first fixing groove 114 and a third opening 114a communicated with the first fixing groove 114, the third opening 114a is disposed toward the second housing 12, and the third opening 114a facilitates the assembly of the circuit board 50 into the first fixing groove 114. The first fixing groove 114 is used for limiting one end of the circuit board 50 in the first space. Alternatively, the portion of the circuit board 50 located in the first fixing groove 114 may be fixed by using an adhesive, which may be glue or the like.

In some embodiments, a first card slot 115 is disposed on an inner side of the first wall 111, the first card slot 115 is communicated with the first fixing slot 114, and the first card slot 115 is used for better fixing one end of the circuit board 50. It can be understood that: the first card slot 115 is not limited to communicate with the first fixing groove 114 as long as the first card slot 115 can realize fixing of one end of the circuit board 50.

As shown in fig. 7-9, in some embodiments, the first housing 11 is provided with a second through hole 1112, the second through hole 1112 penetrating the first wall 111, the second through hole 1112 facilitating the electrical connection between the bus bar 40 and the electric core assembly 20.

In some embodiments, the first housing 11 is provided with a third through hole 1113, the third through hole 1113 penetrates the first wall 111, and the third through hole 1113 facilitates electrical connection between the bus bar 40 and the electrical core assembly 20.

In some embodiments, the first wall 111 includes a first portion 111a and a second portion 111b, the first through hole 1111 is located at the first portion 111a, and the second through hole 1112 and the third through hole 1113 are located at the second portion 111b. Optionally, the second portion 111b protrudes from the first portion 111a in a direction opposite to the first direction X.

In some embodiments, the first portion 111a is provided with a first protrusion 1114, the first protrusion 1114 being configured to couple with the connection assembly 30 to limit movement of the connection assembly 30 relative to the first wall 111.

In some embodiments, the first housing 11 is provided with a fourth through hole 1115, the fourth through hole 1115 is located on the first wall 111, the fourth through hole 1115 penetrates through the first wall 111, and the fourth through hole 1115 facilitates connection of the connection assembly 30 and the circuit board 50.

As for the second housing 12 described above, as shown in fig. 3 and 10, the second housing 12 is fixed to the first housing 11. The second casing 12 includes a second wall 121 and a plurality of second sidewalls 122 connected to the second wall 121, and the second wall 121 and the first wall 111 are oppositely disposed along the first direction X.

It can be understood that: the first casing 11 and the second casing 12 may be fixed by adhesive, and the fixing method of the first casing 11 and the second casing 12 is not limited to adhesive, and may also be other fixing methods, for example: welding, screwing, etc.

In some embodiments, as shown in fig. 10, the second casing 12 is provided with a second casing space 12a, the second casing space 12a is used for accommodating the plurality of battery cells 21, and the second casing space 12a and the first casing space 11a together form the first space.

In some embodiments, the second casing 12 is provided with a plurality of second concave portions 123, the second concave portions 123 are communicated with the second casing space 12a, and one of the second concave portions 123 is used for placing a second end of one of the battery cells 21, so as to realize a limiting arrangement for one of the battery cells 21, and reduce the relative displacement between the battery cell 21 and the casing 10 in the first space.

In some embodiments, the inner wall of one of the second sidewalls 122 is provided with a second fixing groove 124 and a fourth opening 124a communicating with the second fixing groove 124. The fourth opening 124a allows the other end of the circuit board 50 to be snapped into the second fixing groove 124, and the second fixing groove 124 is used for limiting the other end of the circuit board 50 in the first space.

In some embodiments, a second slot 125 is disposed inside the second wall 121, the second slot 125 communicates with the second fixing groove 124, and the second slot 125 is used for better fixing the other end of the circuit board 50.

In some embodiments, as shown in fig. 3 and 10, the second housing 12 is provided with an outlet 126, and the outlet 126 facilitates the wires on the circuit board 50 to extend out of the outlet 126 to connect with other components. Optionally, an outlet 126 is formed on the second wall, and the outlet 126 is adjacent to the second card slot 125 and the second fixing slot 124, so as to facilitate the wiring harness to extend out of the second housing 12 from the outlet 126.

With regard to the above-mentioned cell assembly 20, as shown in fig. 11 and 12, the cell assembly 20 is at least partially located in the first space, the cell assembly 20 includes a plurality of cells 21, the plurality of cells 21 are electrically connected, the cell 21 includes a cell casing 211, an electrode assembly 212 and an electrode 213, and the electrode 213 is connected to the electrode assembly 212 and extends out of the cell casing 211. The electrodes 213 include a first electrode 213a and a second electrode 213b. The electrode assembly 212 includes a first pole piece 2121, a second pole piece 2122, and a separation film 2123 disposed between the first pole piece 2121 and the second pole piece 2122, the first electrode 213a is connected to the first pole piece 2121, and the second electrode 213b is connected to the second electrode 213b. In some embodiments, the cell casing 211 may serve as one of two electrodes, for example: the battery cell comprises a battery cell shell 211 and a positive electrode arranged outside the battery cell shell 211, wherein the battery cell shell 211 comprises a conductive material, and the battery cell shell 211 can serve as a negative electrode of the battery cell 21. In this embodiment, the cell casing 211 serves as a negative electrode of the two electrodes. Optionally, the battery cells 21 are arranged along the third direction Z. In some embodiments, the plurality of battery cells 21 are arranged along the third direction Z to form the first battery cell group 21a.

In some embodiments, referring to fig. 13 and 14, when viewed along the first direction X, the second electrode 213b is at least partially disposed in the first through hole 1111, so as to facilitate the connection between the second electrode 213b and the connecting component 30.

It should be noted that: the positive and negative electrodes of the first electrode 213a and the second electrode 213b are not limited, the first electrode 213a may be a positive electrode or a negative electrode, and the second electrode 213b may be a negative electrode or a positive electrode, as long as the first electrode 213a and the second electrode 213b are opposite electrodes.

In some embodiments, the first electrode 213a includes a first connection part 213aa, the second electrode 213b includes a second connection part 213bb, the positions of the first and second connection parts 213aa and 213bb on the cell casing 211 may not be particularly limited, and the first connection part 213aa may be located at a side close to the connection assembly 30. For example: the first and second connection portions 213aa and 213bb may be located at opposite ends of the cell casing 211, or the first and second connection portions 213aa and 213bb may be located at the same end of the cell casing 211. In this embodiment, the first connection portion 213aa and the second connection portion 213bb are located at the same end of the battery cell. Alternatively, the first connection portion 213aa protrudes from the second connection portion 213bb in a direction opposite to the first direction X.

In some embodiments, when viewed along the first direction X, the first connection portion 213aa is at least partially located in the second through hole 1112, and the second connection portion 213bb is located in the first through hole 1111, so as to be electrically connected to the bus bar 40, and the adjacent battery cells 21 are connected in series.

In some embodiments, when viewed along the first direction X, the first electrode 213a is at least partially located in the first through hole 1111, the second electrode 213b is at least partially located in the second through hole 11112, and the adjacent battery cells 21 are electrically connected by the bus bar 40.

In some embodiments, along the first direction X, the projection of the second connection portion 213bb is disposed around the outer side of the projection of the first connection portion 213 aa. Optionally, an insulating sheet 214 is disposed between the first connection portion 213aa and the second connection portion 213bb, and the insulating sheet 214 is annular.

In some embodiments, referring to fig. 15, the second connection portion 213bb includes a first region 213bb1 and a second region 213bb2, and the first region 213bb1 is located in the third through hole 1113 when viewed along the first direction X. In the third direction Z, the second region 213bb2 is located between the first region 213bb1 and the first connection portion 213aa of the adjacent cell, and as viewed in the first direction X, the first wall 111 covers the second region 213bb2, so as to limit the electrical connection between the second region 213bb2 and the first region 213bb1 of the adjacent cell, and to limit the electrical connection between the second region 213bb2 and the first connection portion 213aa of the same cell 21. When the adjacent battery cells are electrically connected by using the bus bar 40, one end of the bus bar 40 is electrically connected to the first connection portion 213aa of one of the battery cells, and the other end of the bus bar is electrically connected to the first region 213bb1 of the other battery cell, so that the electrical connection between the adjacent two battery cells is realized. Viewed along the first direction X, the first wall 111 includes a partition 1116 disposed between the third through hole 1113 and the second through hole 1112, and the third through hole 113, the partition 1116 and the second through hole 1112 are sequentially disposed along the third direction Z, and the partition 1116 can limit the first connection portion 213aa and the second connection portion 213bb of the same electrical core from being electrically connected, so as to reduce the risk of short circuit.

With regard to the above-mentioned connecting assembly 30, as shown in fig. 8, 9 and 16, the connecting assembly 30 is electrically connected to the core assembly 20, the connecting assembly 30 includes a first insulating member 301, a second insulating member 302 and a conductive member 303, the conductive member 303 is at least partially located between the first insulating member 301 and the second insulating member 302 along the first direction X, the first insulating member 301 is closer to the first wall 111 than the second insulating member 302, and optionally, the first insulating member 301 is closer to the first portion 111a of the first wall 111 than the second insulating member 302. Optionally, along the first direction X, the conductive member 303 is located between the second electrode 213b and the first insulating member 301. In some embodiments, the connection assembly 30 is disposed on the first portion 111a of the first wall 111. In other embodiments, the positions of the first insulating member 301 and the second insulating member 302 can be interchanged, for example, the second insulating member 302 is closer to the first wall 111 than the first insulating member 301. In some embodiments, the first insulating member 301 is provided with a first opening 3011, and along the first direction X, a projection of the first opening 3011, a projection of the conductive member 303, a projection of the first through hole 1111, and a projection of the second electrode 213b overlap, so as to facilitate electrical connection between the second electrode 213b and the conductive member 303, and a user can know which specific cell 21 is sampled through a position of the first opening 3011, thereby reducing an erroneous determination.

In some embodiments, the second insulating member 302 is provided with a second opening 3021, and along the first direction X, a projection of the first opening 3011, a projection of the second opening 3021, a projection of the conductive member 303, a projection of the first through hole 1111, and a projection of the second electrode 213b overlap, so as to facilitate electrical connection between the second electrode 213b and the conductive member 303, and reduce an erroneous determination occurring when sampling is performed by using the connecting member 30, and a user can know which specific cell is sampled through positions of the first opening 3011 and the second opening 3021, thereby reducing the erroneous determination.

In some embodiments, the conductive member 303 is connected to at least one of the first connection portion 213aa or the second connection portion 213bb. Optionally, the conductive member 303 is connected to the first connection portion 213aa, and may collect information of the battery cell 21, such as voltage, current, and the like. Optionally, information, such as voltage, current, and the like, of two adjacent battery cells 21 may be acquired. Optionally, the conductive member 303 is connected to the second connection portion 213bb, and may collect information of the battery cell 21, such as voltage, current, and the like. Optionally, the conductive member 303 is connected to the second connection portion 213bb, and can acquire information of two adjacent battery cells 21, such as voltage, current, and the like. In this embodiment, the conductive device 303 is connected to the second connection portion 213bb, and the conductive device 303 can be connected to other regions except the first region 213bb1 and the second region 213bb2, so as to facilitate assembly and connection.

In some embodiments, the connecting assembly 30 is provided with the connecting opening 304, and the first protrusion 1114 is located in the connecting opening 304, so as to limit the connecting assembly 30 on the first wall 111 and reduce the movement of the connecting assembly 30. Optionally, the connecting opening 304 is a through hole or a blind hole or a concave portion, wherein the through hole passes through the connecting component 30, and the opening direction of the blind hole or the concave portion faces the first convex portion 1114.

In some embodiments, the conductive member 303 includes a plurality of conductive metal members 3031, and the plurality of conductive metal members 3031 are sequentially arranged at intervals along the second direction Y. Optionally, the lengths of the conductive metal members 3031 decrease sequentially along the third direction Z.

In some embodiments, referring to fig. 17, each of the conductive metal members 3031 includes a first segment 3031a and a second segment 3031b, which are separated from each other, the first segment 3031a is connected to the first electrode 213 a/the second electrode 213b, and the second segment 3031b is not electrically connected to the electric core assembly 20. The length of the conductive metal member 3031 is substantially the same along the third direction Z, which is beneficial to assembly and manufacture. In some embodiments, the connecting assembly 30 includes a Flexible Flat Cable (FFC), wherein the conductive metallic member 3031 may include thinner copper wires, which is beneficial to reduce the space occupied by the conductive metallic member 3031.

In some embodiments, the plurality of conductive metal members 3031 are arranged along the second direction Y to form a first conductive metal member group 3031a, the first conductive metal member group 3031a is connected to the first battery cell group 21a, referring to fig. 11 together, along the second direction Y, the first conductive metal member 3031a is provided with first connection points 3031aa electrically connected to the battery cells 21, and the first connection points 3031aa are located at the same side close to the first electrode 213a, which is beneficial for assembly and manufacturing. Optionally, the first conductive metal part 3031a is provided with first connection points 3031aa electrically connected with the battery cells 21, which are located on the same side of the electrical connection region between the first electrode 213a and the bus bar 40. Along the first direction X, a projection of a portion of the conductive metal member 3031 overlaps a projection of the first electrode 213a, and the first electrode 213a and the conductive metal member 3031 can be restricted from being electrically connected by the first insulating member 301 and the second insulating member 302.

The connecting assembly 30 in this embodiment is disposed on the first housing 11, and it should be understood that the position of the connecting assembly 30 may not be limited to the first housing 11, and the number of the connecting assemblies 30 may be selected according to actual situations, for example: the number of the connecting components 30 may be 2, one of the connecting components 30 is disposed on the first housing 11, and the other connecting component 30 is disposed on the second housing 12, at this time, the structure of the second housing 12 may be disposed according to the structure of the first housing 11, which is not described herein.

As for the plurality of bus bars 40, as shown in fig. 13 and 14, the plurality of bus bars 40 are disposed on the first wall 111, and one bus bar 40 connects the first electrode 213a and/or the second electrode 213b of the adjacent battery cells 21. Adjacent battery cells 21 may be connected in series or in parallel, and when adjacent battery cells 21 are connected in series, one end of one bus bar 40 is connected to the first electrode 213a of one battery cell 21 in the adjacent battery cells 21, and the other end of the bus bar 40 is connected to the second electrode 213b of another battery cell 21 in the adjacent battery cells 21. When the adjacent battery cells 21 are connected in parallel, one end of one busbar 40 is connected to the first electrode 213 a/the second electrode 213b of one battery cell 21 in the adjacent battery cells 21, and the other end of the busbar 40 is connected to the first electrode 213 a/the second electrode 213b of another battery cell 21 in the adjacent battery cells 21, it can be understood that when the adjacent battery cells 21 are connected in parallel, the two ends of one busbar 40 are connected to the same electrode of the adjacent battery cells 21, which may be the first electrode 213a at the same time, or the second electrode 213b at the same time. Optionally, the bus bar 40 is disposed on a side of the first wall 111 away from the electric core assembly 20.

In some embodiments, in two adjacent battery cells 21, one end of the bus bar 40 is connected to the first connection portion 213aa of one of the battery cells 21, and the other end of the bus bar 40 is connected to the second connection portion 213bb of the other battery cell 21.

As for the circuit board 50, the first conductive sheet 60, and the second conductive sheet 70, as shown in fig. 18 and fig. 19, the circuit board 50 is disposed in the first space, one end of the first conductive sheet 60 is connected to the circuit board 50, the other end of the first conductive sheet 60 is connected to the first electrode 213a of the battery cell 21, one end of the second conductive sheet 70 is connected to the circuit board 50, and the other end of the second conductive sheet 70 is connected to the second electrode 213b of the battery cell 21, so that the circuit board 50 and the battery cell assembly 20 are electrically connected. Circuit board 50 can be used to stabilize the voltage of group battery, and the protection group battery normally works, simultaneously, works as when the group battery is in the discharge process, coupling assembling 30 transmits the information such as electric core 21 voltage that detects for circuit board 50, when battery electric quantity is low excessively, stops output electric quantity, plays the guard action to the battery, works as when the group battery is in the charging process, when the battery is full of the electricity, but circuit board 50 automatic disconnection charging circuit avoids the battery overcharge and damages.

In some embodiments, the circuit board 50 includes a Battery Management System (BMS) board, which can be used to control the charging and discharging of the Battery cells 21. In some embodiments, the circuit board 50 is connected to one end of the connecting assembly 30, and optionally, one end of the connecting assembly 30 passes through the fourth through hole 1115 to be connected to the circuit board 50.

In some embodiments, along the first direction X, the projection of the circuit board 50 and the projection of the battery cell 21 are separated from each other. Optionally, along the third direction Z, the projection of the circuit board 50 and the projection of the battery cell 21 overlap.

As for the third insulating member 80, as shown in fig. 18, the third insulating member 80 is covered on a surface of the first housing 11 facing away from the battery cell 21, the third insulating member 80 is covered on the first wall 111 of the first housing 11, and the third insulating member 80 covers the bus bar 40 and the connecting assembly 30. The third insulating member 80 may serve to protect the bus bar 40 and the connecting assembly 30 provided at the first wall 111, reduce contact of the bus bar 40 and the connecting assembly 30 with external members, and simultaneously seal one side of the first case 11 of the battery pack.

It can be understood that: in order to reduce the contact of the bus bar 40 and the connecting assembly 30 with the external members and to seal the battery pack, the use of the third insulating member 80 is not limited, but other manners, such as: toward first wall 111 increase the resin layer, for example the encapsulating, utilize the glue after solidifying to protect busbar 40 and coupling assembling 30, simultaneously, when the group battery falls to ground, the glue after solidifying can play the cushioning effect, more effectual plays the guard action to busbar 40 and coupling assembling 30.

As shown in fig. 20, the assembly process of the battery pack of the present embodiment includes:

step S1: accommodating the circuit board 50 and the plurality of battery cells 21 in the first casing 11 and the second casing 12;

step S2: mounting the plurality of bus bars 40 and the connection assembly 30 to the first housing 11, and connecting the plurality of bus bars 40 and the connection assembly 30 to the battery cells 21;

and step S3: the first conductive sheet 60 and the second conductive sheet 70 extend out from the first casing 11, and the first conductive sheet 60 and the second conductive sheet 70 are connected to the battery cells 21;

and step S4: the third insulator 80 is provided to the first housing 11 to cover the bus bar 40 and the connection assembly 30.

In some embodiments, the battery pack assembling process may further include the step S5: the flowing resin is fixed after being disposed outside the first housing 11 to form a resin layer for fixing the bus bar 40, the connecting assembly 30, and the first housing 11.

In some embodiments, in step S3, the first conductive sheet 60 and the second conductive sheet 70 extend from the first housing 11, and the extended first conductive sheet 60 facilitates bending in subsequent processes, and at the same time, contact between the first conductive sheet 60 and the first housing 11 can be reduced, and damage to the first conductive sheet 60 can be reduced.

The above description is only an example of the present application, and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes performed by the present application and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (25)

1. A battery pack, comprising:

the battery pack comprises a battery core assembly and a battery cover, wherein the battery core assembly comprises a plurality of battery cells which are electrically connected with each other, each battery cell comprises a battery cell shell, an electrode assembly and electrodes, the electrodes are connected to the electrode assembly, and the electrodes comprise a first electrode and a second electrode which are opposite in polarity;

the connecting assembly is electrically connected with the electric core assembly and comprises a first insulating part, a second insulating part and a conducting part, the conducting part is at least partially positioned between the first insulating part and the second insulating part along a first direction, and the first insulating part is provided with a first opening;

the shell is provided with a first space, the electric core assembly is at least partially positioned in the first space, the shell comprises a first wall and a first through hole, the first through hole penetrates through the first wall and is observed along the first direction, and the second electrode is at least partially positioned in the first through hole;

along a first direction, a projection of the first opening, a projection of the conductive member, a projection of the first through hole, and a projection of the second electrode overlap.

2. The battery pack according to claim 1,

the first electrode comprises a first connection portion and the second electrode comprises a second connection portion, the first connection portion and the second connection portion are respectively positioned at two opposite ends of the battery cell, the first connection portion protrudes out of the battery cell shell, or,

the first connecting portion and the second connecting portion are located at the same end of the battery cell, and the first connecting portion protrudes out of the second connecting portion along the direction opposite to the first direction.

3. The battery pack according to claim 2,

along the first direction, the projection of the second connecting portion is arranged around the outer side of the projection of the first connecting portion.

4. The battery pack according to claim 3,

the conductive member is connected to the second connecting portion.

5. The battery pack according to any one of claims 2 to 4,

the battery pack comprises a plurality of busbars, the busbars are arranged on the first wall, the busbars are arranged on one side, away from the electric core assembly, of the first wall, and the busbars are connected with the first electrodes and/or the second electrodes of the adjacent electric cores.

6. The battery pack according to claim 5,

at least one of the busbars is connected to the first and second electrodes in a manner that includes one of:

a) The busbar is connected with the first electrode of one battery cell and connected with the first electrode of the other adjacent battery cell;

b) The busbar is connected with the second electrode of one battery cell and connected with the second electrode of the other adjacent battery cell;

c) The busbar is connected with the first electrode of one battery cell and connected with the second electrode of another adjacent battery cell;

d) One busbar is connected to the second electrode of one cell and to the first electrode of another, adjacent cell.

7. The battery pack according to claim 5,

the first wall is provided with a second through hole, and the first connecting part is at least partially positioned in the second through hole when observed along the first direction.

8. The battery pack according to claim 7,

the second connection portion includes a first region;

the first wall is provided with a third through hole, the first area is at least partially located in the third through hole when the first wall is observed along a first direction, one end of one busbar is connected to the first connecting portion of one of the battery cells in two adjacent battery cells, and the other end of the busbar is connected to the first area of the other battery cell.

9. The battery pack according to claim 8,

viewed in the first direction, the first region is located within the third through hole.

10. The battery pack according to claim 8,

the second connecting portion includes a second region, the second region of one of the two adjacent battery cells is located between the first connecting portion of the battery cell and the first region of the other battery cell, and the first wall covers the second region of the battery cell when viewed along the first direction.

11. The battery pack according to claim 8,

the first wall includes a first portion and a second portion, the first through hole is located in the first portion, the second through hole and the third through hole are located in the second portion, and the second portion protrudes from the first portion in a direction opposite to the first direction.

12. The battery pack according to claim 11,

the connecting component is arranged on the first part.

13. The battery pack according to claim 12,

the connecting assembly is provided with a connecting opening;

the first portion is provided with a first protrusion, which is provided in the connection opening.

14. The battery pack according to claim 4,

the conductive piece comprises a plurality of conductive metal pieces, the conductive metal pieces are sequentially arranged at intervals along a second direction, and the lengths of the conductive metal pieces are sequentially reduced along a third direction, wherein the third direction is perpendicular to the first direction and the second direction.

15. The battery pack according to claim 4,

the conductive parts comprise a plurality of conductive metal parts which are sequentially arranged at intervals along a second direction, each conductive metal part comprises a first section and a second section which are separated from each other, the first sections are connected with the second electrode, and the second sections are not electrically connected with the electric core assembly.

16. The battery pack according to claim 4,

the battery pack comprises a circuit board, the circuit board is arranged in the first space, the circuit board is electrically connected with the battery cell component, and the circuit board is connected with one end of the connecting component.

17. The battery pack according to claim 16,

the shell comprises a fourth through hole penetrating through the first wall, and one end of the conductive piece is connected to the circuit board through the fourth through hole.

18. The battery pack according to claim 17,

along the first direction, the projection of the circuit board is separated from the projection of the battery cell.

19. The battery pack according to claim 17,

the battery cores are sequentially arranged along a third direction, and along the third direction, the projection of the circuit board is overlapped with the projection of the battery cores.

20. The battery of claim 4, wherein the first insulator is closer to the first wall than the second insulator along the first direction.

21. The battery according to any one of claims 8 to 11, wherein the first wall comprises a partition portion provided between the third through hole and the second through hole which are adjacent to each other, and the third through hole, the partition portion, and the second through hole are arranged in this order in a third direction which is perpendicular to the first direction.

22. The battery according to any one of claims 6 to 11, further comprising a third insulating member provided on an outer surface of the case, the third insulating member covering the bus bar and the connection member.

23. The battery pack according to claim 1,

the second insulating part is provided with a second opening, and along the first direction, the projection of the first opening, the projection of the second opening, the projection of the conductive part, the projection of the first through hole and the projection of the second electrode are overlapped.

24. The battery pack of claim 1, wherein the connection assembly is configured to collect at least one of a voltage, a current, or a temperature of the cells.

25. An electrical device comprising a battery as claimed in any one of claims 1 to 24.

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