CN217507575U - Battery connector group, battery and electric device - Google Patents

Abstract

The utility model provides a connecting piece group, battery and power consumption device of battery. A battery connector group for connecting a plurality of battery cells included in a battery and connecting the battery to an external device, comprising: a first connector, comprising: an electrode terminal connection part connected to one electrode terminal of the battery cell, and an external connection part connecting the electrode terminal connection part with an external device, the electrode terminal connection part and the external connection part of the first connecting member being formed as an integrated structure by being integrally molded; and a second connector comprising: two electrode terminal connection parts respectively connected to one electrode terminal of different battery cells, and a unit connection member connecting the two electrode terminal connection parts, the two electrode terminal connection parts and the unit connection member of the second connection member being formed in an integrated structure by integral molding.

Description

Battery connector group, battery and electric device

Technical Field

The utility model relates to a battery technology field specifically, relates to a connecting piece group, battery and the power consumption device of battery.

Background

In recent years, with the progress of technology, particularly the development of electric vehicle technology, the demand for battery performance has become higher and higher. A battery generally includes a battery cell in which a plurality of battery cells are stacked, and in order to meet high energy density requirements such as high voltage and large capacity, a plurality of battery cells are connected in series/parallel/series, and then connected to an external device. At present, the connection between the battery units and the external device are generally performed by using the through connection straps and the locking interfaces, but such a connection structure not only requires a complicated welding process, but also requires a large number of parts (transition connection pieces, locking interfaces, etc.), thereby resulting in a complicated manufacturing process and an increase in equipment cost. In addition, even after the connection between the battery cell or the battery and other components is completed, there are phenomena of twist loss and poor locking interface, which cause a problem of increased impedance and affect the performance of the battery.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present application aims to provide a connecting member group of a battery, a battery and an electric device, which can not only simplify the welding process and save the manufacturing process cost, but also reduce the connecting members and reduce the equipment cost. In addition, the phenomena of torsion dropping and poor locking and attaching interface which often occur in the prior art can be avoided, the interface impedance can be reduced, and the performance of the battery can be improved.

In a first aspect, an embodiment of the present application provides a connection group for a battery, configured to connect a plurality of battery cells of the battery and connect the battery with an external device, including: a first connector, the first connector comprising: an electrode terminal connection part connected to one electrode terminal of the battery cell, and an external connection part connecting the electrode terminal connection part and the external device, wherein the electrode terminal connection part and the external connection part of the first connector are formed as an integrated structure by being integrally molded; and a second connector, the second connector comprising: two electrode terminal connection parts respectively connected with one electrode terminal of different battery cells, and a unit connection member connecting the two electrode terminal connection parts, wherein the two electrode terminal connection parts of the second connection member and the unit connection member are formed as an integrated structure by integral molding.

According to the technical scheme of the embodiment of the application, other parts such as the switching bus bar and the locking interface are not needed to be additionally used, and the battery can be directly connected with the external equipment by only utilizing the first connecting piece of the integrated structure. In addition, since the two electrode terminal connection parts of the second connector and the cell connector are integrally formed, it is possible to connect the plurality of battery cells (in series/parallel/series) by using the integrally formed second connector without separately using other members such as the tab and the locking interface, thereby reducing the number of manufacturing processes and manufacturing costs. In addition, the first connecting piece and the second connecting piece can be connected with the electrode terminal only by simply welding the electrode terminal connecting part and the electrode terminal connecting part to the corresponding electrode terminal respectively, and other parts such as the switching strap, the locking interface and the like do not need to be welded, so that the welding process can be simplified, and the manufacturing process cost is saved. In addition, as the intermediate media such as the switching bus bar and the locking interface used in indirect connection do not exist, the phenomena of torsion dropping and poor locking interface which often occur in the prior art can be completely avoided, the interface impedance can be reduced, and the performance of the battery can be improved.

In some embodiments, a welding part is provided at a portion of the electrode terminal connection part of each of the first and second connection members, to which the electrode terminal is correspondingly connected. Therefore, the connection position with the electrode terminal can be accurately positioned, so that the connection of the connection member group (the first connection member and the second connection member) to the battery is easier. In addition, since the positioning connection with the electrode terminal can be realized only by providing the welding portion, the manufacturing is facilitated, and the cost can be saved.

In some embodiments, the first connector and the second connector are each sheet-like in their entirety. Therefore, the first connecting piece and the second connecting piece are easier to process and manufacture, the manufacturing process can be saved, the cost can be reduced, and the first connecting piece and the second connecting piece which are integrally in the shape of a sheet are easier to connect relative to the battery or external equipment in space. In addition, by forming the first connector and the second connector integrally in a sheet shape, it is possible to more easily provide the welded portion thereon by integral molding.

In some embodiments, the respective electrode terminal connecting portions of the first and second connectors are rectangular, the external connection portion of the first connector is zigzag-shaped, the electrode terminal connecting portion of the first connector is connected to one end of the external connection portion, the unit connector of the second connector is U-shaped, and the two electrode terminal connecting portions of the second connector are respectively connected to both ends of the unit connector. Therefore, it is possible to easily form the first and second connecting members through a simple manufacturing process and a simple manufacturing tool (e.g., a molding die, a press process, etc.), and to facilitate the connection of the first connecting member with the motor terminal and the external device, and to facilitate the connection of the second connecting member with the motor terminal, so that it is possible to more easily connect the battery cells using the second connecting member.

In some embodiments, in the first connector, an end of the external connection part connected to the electrode terminal connection part has a first stepped portion, and the electrode terminal connection part of the first connector is connected to the external connection part through the first stepped portion, in the second connector, ends of the unit connectors connected to the electrode terminal connection part respectively have second stepped portions, and the two electrode terminal connection parts of the second connector are connected to both ends of the unit connectors through the second stepped portions respectively. Therefore, can be under the prerequisite of not destroying the integrated into one piece of first connecting piece and second connecting piece, make electrode terminal connecting portion and external portion, there is the step difference between electrode terminal connecting portion and the unit connection spare, thereby can be when assembly and welding, utilize the step difference to fix a position electrode terminal connecting portion and electrode terminal connecting portion for electrode terminal more accurately, be convenient for the connection between the battery cell and the connection of battery cell and external equipment, and need not loaded down with trivial details part and manufacturing process, can be when carrying out integrated into one piece respectively first connecting piece and second connecting piece through mould shaping, die-cut shaping, the stamping forming etc. forms in the lump, thereby can save time and reduce cost.

In some embodiments, when the number of the battery cells is n, the number of the first connecting members is two, the number of the second connecting members is n-1, the polarities of the electrode terminals connected to the respective two first connecting members are opposite, and one of the two first connecting members serves as an output electrode connecting member of the battery and the other serves as an input electrode connecting member of the battery, and in n-1 second connecting members, the polarities of the electrode terminals connected to the two electrode terminal connecting members of the same second connecting member are opposite, and n-1 second connecting members connect n battery cells, where n is an integer greater than 1. Therefore, the connection of the plurality of battery cells and the connection of the battery to the external device can be achieved only by using two first connection members and a plurality of second connection members having a simple structure.

In some embodiments, the first connector and the second connector are aluminum sheets. Therefore, other expensive metals are not required, the cost can be reduced, and the aluminum structure is easier to process and manufacture. In addition, the first connecting member and the second connecting member formed of aluminum sheets are more easily welded.

In a second aspect, an embodiment of the present application further provides a battery, where the battery includes the connection group of the battery provided in the first aspect of the embodiment of the present application.

In some embodiments, the battery unit includes a plurality of battery cells stacked in a first direction, the battery cells having two electrode terminals with opposite polarities on a top surface, the battery further including: a flexible printed circuit board positioned between the two electrode terminals having opposite polarities in the battery cell and extending in the first direction; and a plurality of terminal connection pieces that are arranged across the flexible printed circuit board in a second direction orthogonal to the first direction and are connected to the flexible printed circuit board, wherein the plurality of terminal connection pieces are connected to the electrode terminals to which the electrode terminal connection portions are not connected, respectively. Therefore, the interconnection of the battery cells and the interconnection of the battery and the external device can be achieved with a simple structure, the manufacturing cost can be saved, the fitting and installation are easy, the terminal connecting pieces are easy to manufacture, the universality is high, and the cost can be saved.

In some embodiments, the battery pack further includes end plates located at both ends of the battery cell in the first direction, and the electrode terminal connection parts of the connection group are connected to the electrode terminals of the end plates located next to the same end side. Therefore, the electrode terminal connecting portions of the connecting member group are disposed on the outermost side of the side where the end plates on the same side are located, whereby the connection of the battery cells to each other and the connection of the battery to an external device can be facilitated.

In some embodiments, in the first direction, two of the terminal connecting pieces adjacent two by two are formed as a terminal connecting piece group of an integral structure by integral molding. Therefore, it is possible to facilitate the mounting of each terminal connecting piece group to the battery cell, and the manufacturing process of the terminal connecting piece group is simpler compared to the terminal connecting pieces of the cells, so that the manufacturing process can be simplified.

In some embodiments, the flexible printed circuit board further includes a plurality of conductive connection pieces through which the electrode terminal connection part and the terminal connection piece or the terminal connection piece group are electrically connected with the flexible printed circuit board, respectively. Therefore, the connection structure between the terminal connection piece and the flexible printed circuit board can be simplified, the electrical connection can be realized only through the conductive connection pieces, and each conductive connection piece is easy to manufacture and easier to assemble compared with the terminal connection piece and the flexible printed circuit board.

In some embodiments, further comprising a separator between the top surface of the battery cell and the flexible printed circuit board, the separator having a plurality of through-holes corresponding to the electrode terminals, the electrode terminals being respectively exposable from the corresponding through-holes. Therefore, by providing a separator between the top surface of each battery cell of the battery unit and the flexible printed circuit board, electrical isolation of the battery can be achieved, and the separator can also provide a place for placing the flexible printed circuit board, the electrode terminal connection part of the connection assembly, each terminal connecting piece, or the terminal connecting piece group.

In some embodiments, the separator plates of the adjacent two battery cells are formed as a unitary structure by integral molding. Therefore, the mounting structure and the manufacturing process can be simplified, and the mounting of the partition plate is facilitated.

In some embodiments, the conductive tab is a nickel tab. Therefore, it is not necessary to use other expensive metals, cost can be reduced, and manufacturing is easy. Furthermore, forming the conductive connection piece from a nickel piece makes it easier to mount to a printed circuit board and to connect with a terminal connection piece or a set of terminal connection pieces.

In a third aspect, an embodiment of the present application further provides an electric device, where the electric device includes the battery provided in the second aspect of the embodiment of the present application.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

fig. 1 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

Fig. 2 is a perspective view of a basic structure of a connector group of a battery according to an embodiment of the present application.

Fig. 3 is a perspective view of a battery mounted with a set of connectors according to an embodiment of the present application.

Fig. 4 is an exploded view of the battery shown in fig. 3 with the set of connection members installed.

Fig. 5 is a perspective view of a structure of a battery cell according to an embodiment of the present application.

Description of the reference symbols

1 … … vehicle

10 … … battery

11 … … battery cell

111 … … single battery

1111 … … first side

1112 … … Top surface

1113 … … second side

12 … … Flexible printed Circuit Board

121 … … conductive connecting sheet

13 … … terminal connecting sheet

13g … … terminal connection sheet group

14 … … end plate

15 … … isolation board

151 … … through hole

100 … … battery connecting piece group

101 … … first connector

1011 … … electrode terminal connecting part

1012 … … external connection part

1013 … … weld

102 … … second connector

1021 … … electrode terminal connection part

1022 … … unit connector

1023 … … weld

20 … … motor

30 … … controller

E … … electrode terminal

X … … first direction

Y … … second direction

L … … length

W … … thickness

H … … height.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely for illustrating the technical solutions of the present application more clearly, and therefore are only examples, and the scope of the present application is not limited thereby.

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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof in the description and claims of this application and the description of the figures above, are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

The battery mentioned in the embodiments of the present application refers to a single physical module including a plurality of battery cells to provide higher voltage and capacity. The battery may include a plurality of battery modules (battery cells) electrically connected to each other and a case, the plurality of battery modules being arranged in a space of the case. The tank is typically a sealed tank.

The battery module (battery unit) may include a plurality of battery cells and a frame body that surrounds the plurality of battery cells to be fixed as a whole. Generally, the frame body functions to fix the plurality of battery cells without performing a sealing function.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive plate, a negative plate and a separation film. The battery cell mainly depends on metal ions moving between the positive plate and the negative plate to work. The positive plate comprises a positive current collector and a positive active substance layer, wherein the positive active substance layer is coated on the surface of the positive current collector, the current collector which is not coated with the positive active substance layer protrudes out of the current collector which is coated with the positive active substance layer, and the current collector which is not coated with the positive active substance layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece includes negative current collector and negative pole active substance layer, and the negative pole active substance layer coats in the surface of negative current collector, and the mass flow body protrusion in the mass flow body of coating the negative pole active substance layer of uncoated negative pole active substance layer, the mass flow body of uncoated negative pole active substance layer is as negative pole utmost point ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the high current can be passed through without fusing, a plurality of positive electrode tabs are stacked together, and a plurality of negative electrode tabs are stacked together. The material of the spacer may be PP or PE. In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

In addition, the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes. The battery cells are generally divided into three types in a packaging manner: the battery comprises a cylindrical battery monomer, a square battery monomer and a soft package battery monomer.

In the development of battery technology, it is common to consider various design factors such as performance parameters of energy density, cycle life, discharge capacity, charge and discharge rate, etc. and, in addition, as the demand for large capacity high voltage increases, it is also necessary to consider the inside of the battery such as the connection between battery cells and the connection between the battery and external devices.

In electric devices such as electric vehicles, batteries used therein are generally composed of several tens or even thousands of battery cells stacked to form one or more battery cells (battery modules), and the battery cells are generally required to be connected in series/parallel/series-parallel using an adaptor tab or the like and using other locking members or locking structures (e.g., bolt locking or the like). In addition, the overall structure of the battery also requires connection to an external device through the total output terminal of the battery by using another locking member such as a tab.

However, the energy density of the entire battery, the battery unit, and the battery cells is becoming higher and higher with increasing demand, and when the battery cells having a high energy density are stacked together to form the battery unit, and the battery cells or the battery unit and the external device are connected by using other locking members or locking structures using the tab or the like, a complicated welding process or connecting process and a cumbersome operation process are required, and for example, it is sometimes necessary to weld a plurality of places of the battery using different welding powers under different operation environments. In addition, an adapter tab and a locking interface with a complex structure are required to be prepared, and the materials of the adapter tab and the locking interface are sometimes different from those of a conducting strip for connecting a battery or a connecting part of the battery, so that the connecting mode of the battery in the prior art also increases equipment cost virtually, increases the assembly time of the battery, and increases the manufacturing process cost. In addition, even if the battery cells and the battery and the external device are connected by using the adapter bar and other locking members, the adapter bar and the locking interface have the problem of torsion loss, so that the locking of the locking interface is poor, the use stability of the battery is reduced, and the impedance of the battery is increased due to the use of the adapter bar and other locking members, so that the stability of the battery is further reduced.

In view of this, the present application provides a connection group of a battery for connecting a plurality of battery cells possessed by the battery in series and connecting the battery with an external device, comprising: a first connector, the first connector comprising: an electrode terminal connection part connected to one electrode terminal of the battery cell, and an external connection part connecting the electrode terminal connection part and the external device, wherein the electrode terminal connection part and the external connection part of the first connector are formed as an integrated structure by being integrally molded; and a second connector, the second connector comprising: two electrode terminal connection parts respectively connected with one electrode terminal of different battery cells, and a unit connection member connecting the two electrode terminal connection parts, wherein the two electrode terminal connection parts of the second connection member and the unit connection member are formed as an integrated structure by integral molding.

Here, the "integrally formed by integral molding" means that the integrally formed structure is not indirectly formed by an intermediate (e.g., bolted) but is formed by any integrally formed manufacturing process such as die molding, die cutting, press molding, or the like, or an integral processing process.

The "external device" herein is not particularly limited, and may be any device that can be powered by a battery, such as an engine used in a vehicle, a ship, an aircraft, or the like, or a motor of an electric power tool.

According to the technical scheme, other parts such as the switching strap, the locking interface and the like do not need to be additionally used, and the direct connection between the battery and the external equipment can be realized only by utilizing the first connecting piece of the integrated structure. In addition, since the two electrode terminal connection parts of the second connector and the cell connector are integrally formed, it is possible to connect the plurality of battery cells (in series/parallel/series) by using the integrally formed second connector without separately using other members such as the tab and the locking interface, thereby reducing the number of manufacturing processes and manufacturing costs. In addition, the first connecting piece and the second connecting piece can be connected with the electrode terminal only by simply welding the electrode terminal connecting part and the electrode terminal connecting part to the corresponding electrode terminals respectively, and other parts such as the switching bus sheet, the locking interface and the like do not need to be welded, so that the welding process can be simplified, and the manufacturing process cost can be saved. In addition, as the intermediate media such as the switching bus bar and the locking interface used in indirect connection do not exist, the phenomena of torsion dropping and poor locking interface which often occur in the prior art can be completely avoided, the interface impedance can be reduced, and the performance of the battery can be improved.

Some embodiments of the present application provide an apparatus comprising a battery for providing electrical energy. Alternatively, the device may be a vehicle, a ship, a spacecraft, or the like.

The technical scheme described in the embodiment of the application is applicable to various devices, such as mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships, spacecrafts and the like, for example, the spacecrafts comprise airplanes, rockets, space shuttles, spacecrafts and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described devices, but may be applied to all devices using a battery, and for brevity of description, the following embodiments are all described by taking an electric vehicle as an example.

For example, as shown in fig. 1, which is a schematic structural diagram of a vehicle 1 according to an embodiment of the present disclosure, the vehicle 1 may be a fuel-oil vehicle, a gas-fired vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle. The vehicle 1 may be provided with a motor 20, a controller 30 and a battery 10, wherein the controller 30 is used for controlling the battery 10 to supply power to the motor 20. For example, the battery 10 may be provided at the bottom or the head or tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, for example, the battery 10 may be used as an operation power supply of the vehicle 1 for a circuit system of the vehicle 1, for example, for power demand for operation at the start, navigation, and running of the vehicle 1. In another embodiment of the present application, the battery 10 may be used not only as an operation power source of the vehicle 1 but also as a driving power source of the vehicle 1 instead of or in part of fuel or natural gas to provide driving power to the vehicle 1.

In order to meet different power requirements, the battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series or in parallel or in series-parallel, and the series-parallel refers to a mixture of series connection and parallel connection. The battery may also be referred to as a battery pack. Alternatively, a plurality of battery cells may be connected in series or in parallel or in series-parallel to form a battery module (battery unit), and a plurality of battery modules may be connected in series or in parallel or in series-parallel to form a battery. That is, a plurality of battery cells may directly constitute a battery, or a battery module (battery unit) may be first constituted, and then the battery module (battery unit) may be further constituted into a battery.

The battery connecting piece group can be used for forming a battery module or a battery by connecting a plurality of battery units in series or in parallel or in series-parallel, can be used for connecting the formed battery with external equipment, can also be used for forming the battery by connecting a plurality of battery units in series or in parallel or in series-parallel, or can be used for connecting the formed battery with the external equipment, and can be selected as required. In the following description, for the sake of convenience of understanding, a battery in which a plurality of battery cells are connected in series and which is configured to be connectable to other external devices will be described as an example.

In addition, the battery can also comprise a box body and an end plate, the battery unit and the end plate are arranged in the box body, and the end plate can be arranged between the battery unit and the inner wall of the box body. In the following description, for the sake of easy understanding, other components such as a case, which are less relevant to the gist of the present application, are omitted.

Specifically, as shown in fig. 2 to 4, the present application provides a battery connector group 100 for connecting a plurality of battery cells 11 included in a battery 10 (in the example shown in the drawings, the battery cells are connected in series) and connecting the battery 10 to an external device (not shown). As shown in fig. 2, the connector group 100 includes a first connector 101 and a second connector 102. The first connector 101 includes: an electrode terminal connecting part 1011 connected to one electrode terminal E of the battery cell 11, and an external connecting part 1012 connecting the electrode terminal connecting part 1011 and an external device, the electrode terminal connecting part 1011 and the external connecting part 1012 of the first connector 101 are formed as an integral structure by integral molding. The second connector 102 includes: two electrode terminal connection parts 1021 that are respectively connected to one electrode terminal E of different battery cells 11, and a unit connection part 1022 that connects the two electrode terminal connection parts 1021, the two electrode terminal connection parts 1021 and the unit connection part 1022 of the second connection part 102 being formed as an integral structure by integral molding.

In fig. 2 to 4, the connector group 100 is shown to have two first connectors 101 and one second connector 102 for ease of understanding. In addition, fig. 3 and 4 also schematically show 4 battery units 11, the 4 battery units 11 are grouped two by two to form two groups of battery modules, the second connecting pieces 102 of the connecting piece group 100 connect the two groups of battery modules in series, and the two first connecting pieces 101 of the connecting piece group 100 are respectively used for connecting the whole of the battery 10 with an external device. It should be understood that fig. 2 to 4 are schematic diagrams for convenience of explanation only, and schematically illustrate the number of battery cells 11 and the number of first and second connection members 101 and 102 of the connection member group 100, but the present application is not limited thereto, and the number of the respective members may be increased or decreased as needed. The form and number of the battery cells 111 included in the battery unit 11 are also examples, and are not limited to the illustrated configuration and number.

As shown in fig. 2 to 4, in the present invention, since the electrode terminal connecting portion 1011 and the external connecting portion 1012 of the first connector 101 are integrally formed as an integral structure, it is possible to directly connect the battery 10 and the external device only by the integrally formed first connector 101 without separately using another member such as the relay tab and the locking interface. In addition, since the two electrode terminal connecting parts 1021 and the unit connectors 1022 of the second connector 102 are integrally formed to have an integral structure, it is possible to connect (series/parallel/series) the plurality of battery cells 11 only by the integrally formed second connector 102 without separately using other members such as the tab and the locking interface.

As can be seen from this, in the battery connector group 100 according to the present invention, since the connection between the battery cells 11 and the connection between the entire battery 10 and the external device can be achieved only by the first connector 101 and the second connector 102, it is not necessary to separately manufacture and use other members such as the tab and the locking interface, and thus the number of manufacturing processes can be reduced and the manufacturing cost can be reduced.

In addition, since the first and second connectors 101 and 102 of the connector group 100 of the battery of the present application are of an integral structure, and the first and second connectors 101 and 102 of the integral structure have the electrode terminal connection parts (the electrode terminal connection parts 1011 and the electrode terminal connection parts 1021), respectively, the first and second connectors 101 and 102 can be connected to the electrode terminals E using the electrode terminal connection parts (the electrode terminal connection parts 1011 and the electrode terminal connection parts 1021) of the integral structure thereof, respectively, and thus, the connection of the first and second connectors 101 and 102 to the electrode terminals E can be achieved simply by welding the electrode terminal connection parts 1011 and the electrode terminal connection parts 1021 to the corresponding electrode terminals E, respectively, without welding other parts such as the tab and the lock attachment interface, and thus the welding process can be simplified, the manufacturing process cost is saved.

Furthermore, since the battery cells 11 are connected together by the first and second connectors 101 and 102 of the connector group 100 and the entire battery 10 is connected to an external device, there is no intermediary such as a relay tab and a locking interface used in indirect connection, the phenomena of twist dropping and poor locking interface which often occur in the prior art can be completely eliminated, the interface impedance can be reduced, and the performance of the battery can be improved.

In some embodiments of the present application, as shown in fig. 2 to 4, in the connector group 100, the welding portions (the welding portion 1013 and the welding portion 1023) are respectively provided at the portions of the electrode terminal connection portions (the electrode terminal connection portion 1011 and the electrode terminal connection portion 1021) of the first connector 101 and the second connector 102, which are connected to the electrode terminal E.

By providing the welding part 1013 at the part of the electrode terminal connecting part 1011 of the first connector 101 connected corresponding to the electrode terminal E and the welding part 1023 at the part of the electrode terminal connecting part 1021 of the second connector 102 connected corresponding to the electrode terminal E, it is possible to accurately position the connection position with the electrode terminal E, thereby making it easier to connect the connector group 100 (the first connector 101 and the second connector 102) to the battery 10 (the battery cell 11). Further, since the positioning connection with the electrode terminal E can be realized only by providing the welding portions (the welding portion 1013 and the welding portion 1023), the manufacturing is facilitated, and the cost can be saved. The method of providing the welded portion may be, for example, a method such as die forming, die cutting, or press forming, and the first connector 101 and the second connector 102 may be integrally formed by die forming, die cutting, or press forming, whereby the number of manufacturing steps can be further reduced and the manufacturing cost can be reduced. In addition, in the description of the present application, different reference numerals are used to designate the welding portions (the welding portion 1013 and the welding portion 1023) of the first connector 101 and the second connector 102, respectively, but it should be understood that the welding portion 1013 and the welding portion 1023 may have the same or similar shape and structure as long as they can be connected to the electrode terminal E.

In some embodiments of the present application, as shown in fig. 2 to 4, the first connector 101 and the second connector 102 are each integrally formed in a sheet shape. Since the first and second connectors 101 and 102 are each formed in a sheet shape as a whole, the first and second connectors 101 and 102 can be easily manufactured, manufacturing processes can be saved, costs can be reduced, and the first and second connectors 101 and 102 formed in a sheet shape as a whole can be connected to the battery 10 or an external device more easily in space. In addition, by integrally forming the first connector 101 and the second connector 102 in a sheet shape, it is possible to more easily provide a welded portion thereon by integral molding.

In some embodiments of the present application, as shown in fig. 2 to 4, the respective electrode terminal connection portions (the electrode terminal connection portion 1011 and the electrode terminal connection portion 1021) of the first connection member 101 and the second connection member 102 are rectangular, the external connection portion 1012 of the first connection member 101 is zigzag-shaped, the electrode terminal connection portion 1011 of the first connection member 101 is connected to one end of the external connection portion 1012, the unit connection member 1022 of the second connection member 102 is U-shaped, and the two electrode terminal connection portions 1021 of the second connection member 102 are respectively connected to both ends of the unit connection member 1022.

Thus, by forming the electrode terminal connecting portion 1011 of the first connector 101 to have a rectangular shape, forming the external connection portion 1012 of the first connector 101 to have a zigzag shape, and connecting the electrode terminal connecting portion 1011 of the first connector 101 to one end of the external connection portion 1012, the first connector 101 can be easily formed by a simple processing process and a processing tool (e.g., a molding die, a press process, etc.). Further, by forming the external connection portion 1012 of the first connector 101 in a zigzag shape and connecting the electrode terminal connection portion 1011 of the first connector 101 to one end of the external connection portion 1012, it is possible to facilitate connection of the first connector 101 with the motor terminal E and an external device.

In addition, by forming the electrode terminal connection parts 1021 of the second connector 102 in a rectangular shape, forming the unit connectors 1022 of the second connector 102 in a U-shape, and connecting the two electrode terminal connection parts 1021 of the second connector 102 to both ends of the unit connectors 1022, respectively, it is possible to easily form the first connector 102 by a simple processing process and a processing tool (e.g., a molding die, a press process, etc.). In addition, the unit links 1022 of the second link 102 are formed in a U-shape, and the two electrode terminal connection parts 1021 of the second link 102 are connected to the two ends of the unit links 1022, respectively, so that the connection between the second link 102 and the motor terminal E can be more facilitated, and the battery cells 100 can be more easily connected by the second link 102.

It should be noted that the above-mentioned "rectangular shape", "zigzag shape" and "U-shape" are not particularly limited as long as they are substantially rectangular, zigzag, U-shaped, and are not mathematically strict and non-deviating shapes. In addition, in the description of the present application, different reference numerals are used to designate the electrode terminal connection parts (the electrode terminal connection part 1011 and the electrode terminal connection part 1021) of the first connection part 101 and the second connection part 102, respectively, but it should be understood that the electrode terminal connection part 1011 and the electrode terminal connection part 1021 may have the same or similar shapes and structures.

In some embodiments of the present application, as shown in fig. 2 to 4, in the first connector 101, an end of the external connection portion 1012 connected to the electrode terminal connection portion 1011 has a first step portion 1014, and the electrode terminal connection portion 1011 of the first connector 101 is connected to the external connection portion 1012 through the first step portion 1014. In addition, in the second connector 102, the end portions of the unit connectors 1022 connected to the electrode terminal connection parts 1021 have second stepped parts 1024, respectively, and the two electrode terminal connection parts 1021 of the second connector 102 are connected to both ends of the unit connectors 1022 through the second stepped parts 1024, respectively.

Thus, by providing the first step 1014 and the second step 1024, it is possible to provide a step difference between the electrode terminal connecting portion 1011 and the external connecting portion 1012 and between the electrode terminal connecting portion 1021 and the unit connecting member 1022 without deteriorating the integral molding of the first connector 101 and the second connector 102, so that the electrode terminal connecting portion 1011 and the electrode terminal connecting portion 1021 can be more accurately positioned with respect to the electrode terminal E by using the step difference during the assembly and welding, thereby facilitating the connection between the battery cells 11 and the external device, and without requiring troublesome parts and manufacturing processes, and can be collectively formed by die molding, die cutting, press molding, etc. when the first connector 101 and the second connector 102 are integrally molded, respectively, thereby saving time and reducing costs.

In some embodiments of the present application, when the number of the battery cells 11 is n, the number of the first connection members 101 is two, the number of the second connection members 102 is n-1, the polarities of the electrode terminals E connected to the respective two first connection members 102 are opposite, and one of the two first connection members serves as an output pole connection member of the battery 10 and the other serves as an input pole connection member of the battery 10, the polarities of the electrode terminals E connected to the two electrode terminal connection parts 1021 of the same second connection member 102 are opposite among the n-1 second connection members 102, and the n-1 second connection members 102 connect the n battery cells 11 in series, where n is an integer greater than 1.

Thus, the connection of the plurality of battery cells 11 and the connection of the battery 10 to the external device can be achieved only by using two first connectors 101 and a plurality of second connectors 102 having a simple structure.

In some embodiments of the present application, the first connector 101 and the second connector 102 are aluminum sheets. That is, the first connector 101 and the second connector 102 are an integral structure formed of aluminum sheets, and therefore, other expensive metals do not need to be used, the cost can be reduced, and the aluminum structure is easier to process and manufacture. In addition, the first connector 101 and the second connector 102 formed of aluminum sheets are more easily welded.

As one specific example of the above-described connecting assembly 100, for example, as shown in fig. 2, the first connector 101 of the connecting member group 100 is formed by press-forming, for example, an aluminum material into an integral structure in which the electrode terminal connecting portion 1011 is substantially rectangular and the welded portion 1013 is formed, and the external portion 1012 is substantially zigzag and the connecting portion of the electrode terminal connecting portion 1011 and the external portion 1012 is formed as the step portion 1014. The second connector 102 of the connector group 100 is also formed into an integral structure in which the electrode terminal connection portion 1021 is substantially rectangular and the welding portion 1023 is formed, and the unit connector 1022 is substantially U-shaped and the connection portion of the electrode terminal connection portion 1021 and the unit connector 1022 is formed as the step portion 1024 by press-forming using an aluminum material, for example. Therefore, the connecting structure does not need to be welded at multiple positions, the welding process can be simplified, the manufacturing process cost is saved, connecting parts can be reduced, and the equipment cost is reduced. In addition, the phenomena of torsion dropping and poor locking and attaching interface which often occur in the prior art can be avoided, the interface impedance can be reduced, and the performance of the battery can be improved. In addition, this particular embodiment is merely an example, and it should be understood that the present application is not limited thereto.

In some embodiments of the present application, as shown in fig. 2, the shapes of the welding part 1013 and the welding part 1023 may be circular, the circumscribed part 1012 and the unit connector 1022 may be thin plate-shaped, and a screw hole or the like for connection with an external device may be further provided at the other end of the circumscribed part 1012 opposite to the end to which the electrode terminal connecting part 1011 is connected. It should be understood that the specific structures shown in the drawings are merely specific examples enumerated for convenience of explanation, and the present application is not limited thereto.

In addition, as shown in fig. 3 and 4, an embodiment of the present application further provides a battery 10, and the battery 10 may include the connector group 100 in the foregoing embodiments.

In some embodiments of the present application, as shown in fig. 3 and 4, the battery cell 11 of the battery 10 includes a plurality of battery cells 111 stacked in the first direction X, the battery cells 111 have two electrode terminals E of opposite polarities on a top surface, and the battery 10 further includes: a flexible printed circuit board 12, the flexible printed circuit board 12 being located between two electrode terminals E having opposite polarities in the battery cell 11 and extending in the first direction X; and a plurality of terminal connection pieces 13 arranged across the flexible printed circuit board 12 in a second direction Y orthogonal to the first direction X and connected to the flexible printed circuit board 12, wherein each of the plurality of terminal connection pieces 13 is connected to an electrode terminal E to which an electrode terminal connection portion (electrode terminal connection portion 1011 and electrode terminal connection portion 1021) is not connected.

This allows the cells 11 and the battery 10 to be connected to each other and an external device to be connected to each other with a simple configuration, and also allows the terminal connecting pieces 13 to be easily manufactured and to have high versatility, thereby reducing costs. In addition, in the present application, the terminal connecting piece 13 may be formed to have substantially the same shape as the electrode terminal connecting portion 1011 and the electrode terminal connecting portion 1021 of the connecting member group 100, whereby the versatility of parts can be further achieved, the manufacturing cost can be saved, and the fitting mounting is easy. In addition, it should be understood that the terminal connecting piece 13 may also be formed with a welding portion so as to be capable of facilitating connection with the electrode terminal.

As shown in fig. 5, which is a perspective view of an embodiment of the battery cell 111 of the present application, the battery cell 111 is substantially rectangular, the first side surface 1111 is a surface having a largest area in the battery cell 111, the two electrode terminals E are disposed on the top surface 1112 of the battery cell 111, and a surface adjacent to the first side surface 1111 and the top surface 1112 is the second side surface 1113. Here, the two electrode terminals E are disposed on the top surface 1112 of the battery cell 111 only by way of example, and the two electrode terminals E may be disposed on the second side surface 1113 of the battery cell 111, respectively. For convenience of description, the length, thickness, and height of the battery cell 111 are L, W, and H, that is, a first direction X in which the battery cells 111 are stacked is also a thickness direction (W direction) of the battery cell 111, and a second direction Y orthogonal to the first direction X is also a length direction (L direction) of the battery cell 111. It should be understood that the structure of the battery cell 111 described above is merely an example.

In some embodiments of the present application, as shown in fig. 3 and 4, end plates 14 located at both ends of the battery cell 11 in the first direction X are further included, and the electrode terminal connection parts (the electrode terminal connection part 1011 and the electrode terminal connection part 1021) of the connection group 100 are connected to the electrode terminals E of the end plates 14 located next to the same end side.

Thus, the electrode terminal connection parts (the electrode terminal connection parts 1011 and the electrode terminal connection parts 1021) of the connection member group 100 are disposed on the outermost side of the side where the same-side end plates 14 are located, whereby the mutual connection of the battery cells 11 and the connection of the battery 10 to an external device can be facilitated.

In some embodiments of the present application, as shown in fig. 3 and 4, two terminal connecting pieces 13 adjacent two by two are formed as a terminal connecting piece group 13g of an integral structure by integral molding in the first direction X.

Thus, by integrally molding two terminal connecting pieces 13 adjacent to each other in pair in the first direction X into the terminal connecting piece group 13g of an integral structure, it is possible to facilitate mounting of each terminal connecting piece group 13g to the battery unit 11, and the manufacturing process of the terminal connecting piece group 13g is simpler compared to the single terminal connecting piece 13, so that the manufacturing process can be simplified. Here, the integral molding may be formed as an integral structure by any integral molding manufacturing process such as die molding, die cutting, press molding, or an integral processing process.

In some embodiments of the present application, as shown in fig. 3 and 4, the flexible printed circuit board 12 further includes a plurality of conductive connection pieces 121, and the electrode terminal connection portions (the electrode terminal connection portions 1011 and the electrode terminal connection portions 1021) and the terminal connection pieces 13 or the terminal connection piece groups 13g are electrically connected to the flexible printed circuit board 12 through the conductive connection pieces 121, respectively.

This can simplify the connection structure between the terminal connecting piece 13 and the flexible printed circuit board 12, and can achieve electrical connection only by the conductive connecting pieces 121, and each conductive connecting piece 121 is easy to manufacture and easy to assemble with respect to the terminal connecting piece 13 and the flexible printed circuit board 12.

In some embodiments of the present application, as shown in fig. 3 and 4, the battery 10 further includes a separator 15, the separator 15 being located between the top surface 1112 of each of the battery cells 111 of the battery unit 11 and the flexible printed circuit board 12, having a plurality of through holes 151 corresponding to the electrode terminals E, each of the electrode terminals E being respectively exposed from the corresponding through hole 151.

Thus, the battery 10 can be electrically isolated by providing the separator 15 between the top surface 1112 of each battery cell 111 of the battery unit 11 and the flexible printed circuit board 12, and the separator 15 can provide a place for placing the flexible printed circuit board 12, the electrode terminal connection portions (the electrode terminal connection portions 1011 and 1021) of the connection assembly 100, and each terminal connection piece 13 or the terminal connection piece group 13 g.

In some embodiments of the present application, as shown in fig. 3 and 4, the separators 15 of the adjacent two battery cells 11 are formed as an integral structure by integral molding.

Thereby, the mounting structure and the manufacturing process can be simplified, and the mounting of the partition plate 15 is facilitated. Here, the integral molding may be formed as an integral structure by any integral molding manufacturing process such as die molding, die cutting, press molding, or an integral processing process.

In some embodiments of the present application, the conductive tab 121 is a nickel tab. Therefore, it is not necessary to use other expensive metals, cost can be reduced, and manufacturing is easy. Further, forming the conductive connection piece 121 from a nickel piece makes it easier to mount to the printed circuit board 12 and to connect with the terminal connection piece 13 or the terminal connection piece group 13 g.

In some embodiments of the present application, referring to fig. 3 and 4, as a specific example of assembling the connection assembly 100 to the battery 10, for example, in the assembling, the separator 15 may be first placed on the top surface 1111 of each battery cell 111 of the battery cell 11 of the battery 10, the electrode terminals E may be exposed from the through holes 151 of the separator 15, the connection assembly 100 and the terminal connection pieces 13 may be placed on the separator 15, the electrode terminal connection portions 1011, the electrode terminal connection portions 1021, and the terminal connection pieces 13 (terminal connection piece groups 13g) may be welded to the exposed electrode terminals E, then the flexible printed circuit board 12 may be placed on the separator 15, and the conductive connection pieces 121 of the flexible printed circuit board 12 may be welded to the electrode terminal connection portions 1011, the electrode terminal connection portions 1021, and the terminal connection pieces 13 (terminal connection piece groups 13 g). It should be understood that the above-described assembly process is only an example, and the present application is not limited thereto.

In addition, the specific structures shown in fig. 3 and 4 are only specific examples listed for convenience of explanation, the present application is not limited thereto, and the battery 10 may actually include only any one of the first connecting member 101 and the second connecting member 102 of the connecting member group 100 of the foregoing embodiments as needed, and does not necessarily include both the first connecting member 101 and the second connecting member 102. For example, when the battery 10 uses only one battery cell 11, the second connection member 102 for connecting between the battery cells 11 may be omitted and only the first connection member 101 may be used, or when the output terminal of the battery 10 connected with an external device is a dedicated structure corresponding to the external device, the first connection member 101 for connecting with the external device may be omitted and only the second connection member 102 for connecting between the battery cells 11 may be used.

In addition, an embodiment of the present application further provides an electric device, which may include the battery 10 in the foregoing embodiments, and the battery 10 is used to provide electric energy for the device. Alternatively, the device may be a vehicle, a ship, a spacecraft, or the like.

Finally, the present application is not limited to the above-described embodiments. The above-described embodiments are merely illustrative, and any embodiments having substantially the same configuration as the technical idea and exhibiting the same effects within the technical scope of the present application are included in the technical scope of the present application. In addition, various modifications that can be conceived by those skilled in the art are applied to the embodiments and other embodiments are also included in the scope of the present application, in which some of the constituent elements in the embodiments are combined and configured without departing from the scope of the present application.

Claims (16)

1. A battery connector group for connecting a plurality of battery cells included in a battery and connecting the battery to an external device, comprising:

a first connector, the first connector comprising: an electrode terminal connection part connected to one electrode terminal of the battery cell, and an external connection part connecting the electrode terminal connection part and the external device, wherein the electrode terminal connection part and the external connection part of the first connector are formed as an integrated structure by being integrally molded; and

a second connector, the second connector comprising: and a unit connector connecting the two electrode terminal connection parts, wherein the two electrode terminal connection parts of the second connector and the unit connector are formed in an integrated structure by integral molding.

2. The set of connectors as recited in claim 1, wherein:

a welding portion is provided at a portion of the electrode terminal connection portion of each of the first and second connectors, the portion being connected to the electrode terminal.

3. The set of links of claim 2, wherein:

the first connecting piece and the second connecting piece are respectively sheet-shaped in whole.

4. A set of links according to any of claims 1 to 3, wherein:

the electrode terminal connection parts of the first and second connection members are each rectangular,

the external connection part of the first connector is Z-shaped, the electrode terminal connection part of the first connector is connected to one end of the external connection part,

the unit connecting pieces of the second connecting piece are U-shaped, and the two electrode terminal connecting parts of the second connecting piece are respectively connected to two ends of the unit connecting pieces.

5. The set of connectors as recited in claim 4, wherein:

in the first connector, an end portion of the external connection part connected to the electrode terminal connection part has a first stepped portion, the electrode terminal connection part of the first connector is connected to the external connection part through the first stepped portion,

in the second connector, end portions of the unit connectors connected to the electrode terminal connection parts respectively have second stepped portions, and the two electrode terminal connection parts of the second connector are connected to both ends of the unit connectors through the second stepped portions, respectively.

6. The set of links of claim 5, wherein:

when the number of the battery units is n, the number of the first connecting pieces is two, the number of the second connecting pieces is n-1,

the polarity of the electrode terminals to which the two first connecting members are respectively connected is opposite, and one of the two first connecting members serves as an output pole connecting member of the battery and the other serves as an input pole connecting member of the battery,

and n-1 second connection members connecting the n battery cells, wherein n is an integer greater than 1, and the electrode terminals connected to the two electrode terminal connection parts of the same second connection member have opposite polarities.

7. The set of connectors as recited in claim 6, wherein:

the first connecting piece and the second connecting piece are aluminum sheets.

8. A battery comprising the connector group according to any one of claims 1 to 7.

9. The battery of claim 8, wherein:

the battery cell includes a plurality of battery cells stacked in a first direction, the battery cells having two electrode terminals of opposite polarities on a top surface,

the battery further includes: a flexible printed circuit board positioned between the two electrode terminals having opposite polarities in the battery cell and extending in the first direction; and a plurality of terminal connection pieces arranged across the flexible printed circuit board in a second direction orthogonal to the first direction and connected to the flexible printed circuit board,

wherein the plurality of terminal connection pieces are respectively connected to the electrode terminals not connected to the electrode terminal connection parts in correspondence thereto.

10. The battery of claim 9, wherein:

further comprising end plates located at both ends of the battery cell in the first direction,

the electrode terminal connecting portion of the connecting member group is connected to the electrode terminal of the end plate next to the same end side.

11. The battery of claim 10, wherein:

in the first direction, two adjacent terminal connecting sheets are formed into a terminal connecting sheet group of an integral structure by integral molding.

12. The battery according to any one of claims 9 to 11, wherein:

the flexible printed circuit board further comprises a plurality of conductive connecting sheets, and the electrode terminal connecting portion and the terminal connecting sheet or the terminal connecting sheet group are electrically connected with the flexible printed circuit board through the conductive connecting sheets respectively.

13. The battery of claim 12, further comprising:

and a separator between the top surface of the battery cell and the flexible printed circuit board, the separator having a plurality of through-holes corresponding to the electrode terminals, the electrode terminals being capable of being exposed from the corresponding through-holes, respectively.

14. The battery of claim 13, wherein:

the separators of the adjacent two battery cells are formed as an integral structure by integral molding.

15. The battery of claim 14, wherein:

the conductive connecting sheet is a nickel sheet.

16. An electric device comprising the battery according to any one of claims 8 to 15.

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