Battery and electric device

Abstract

The utility model relates to a battery and a power utilization device, and belongs to the technical field of batteries. The battery comprises a first battery monomer group, an output electrode bus member and a switching bus member, wherein the first battery monomer group comprises a plurality of stacked battery monomers; the output pole confluence piece is connected to at least one battery monomer in the first battery monomer group; the switching confluence piece is used for electrically connecting the first battery monomer group with parts except the first battery monomer group, and the switching confluence piece is welded and fixed with the output pole confluence piece. According to the battery provided by the invention, the requirements of scheme simplification, cost control and efficiency improvement of total assembly of the battery can be effectively met.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] During the battery manufacturing process, how to balance the requirements of battery assembly solution simplification, cost control and efficiency improvement is a technical problem that urgently needs to be solved in battery technology. Utility Model Content

[0004] The purpose of the present application is to provide a battery and an electrical device to address the above-mentioned problems, which can effectively simplify the solution of battery assembly and reduce assembly costs, while at the same time effectively shortening the working hours of battery assembly to a certain extent and improving assembly efficiency.

[0005] In a first aspect, the present application provides a battery, comprising a first battery cell group, an output pole busbar, and a transfer busbar. The first battery cell group comprises a plurality of stacked battery cells. The output pole busbar is connected to at least one battery cell in the first battery cell group; the transfer busbar is welded and fixed to the output pole busbar, and the transfer busbar is used to electrically connect the first battery cell group with components other than the first battery cell group.

[0006] In the technical solution of the embodiment of the present application, a plurality of stacked battery cells constitute a first battery cell group. The number of battery cells and the electrical connection method can be selected in a variety of ways. The corresponding battery voltage and capacity can also be designed in a variety of ways and can be laid out according to actual needs.

[0007] The transfer bus is a functional element for outputting the electrical energy of the first battery cell group, and is used to electrically connect the first battery cell group and components other than the first battery cell group. It should be noted that in some embodiments, the transfer bus can be used as the total output of the battery for external connection; in other embodiments, the battery may also include a second battery cell group, and the transfer bus can also be used to connect the first battery cell group and the second battery cell group of the battery, that is, to electrically connect two adjacent battery cell groups. This solution does not limit whether the battery has a second battery cell group, a third battery cell group, etc. in addition to the first battery cell group, nor does it limit the number of output pole buss and transfer buss. In some embodiments, there can be multiple transfer buss, and a part of the transfer buss can be used as the total output of the battery for external connection, and another part of the transfer buss is used to electrically connect two adjacent battery cell groups.

[0008] When the battery has a second battery cell group in addition to the first battery cell group, the two ends of the adapter busbar are respectively connected to the second battery cell group and the output pole busbar connected to the first battery cell group. In some embodiments, the connection method of the adapter busbar and the second battery cell group can be an existing connection scheme; in some embodiments, the connection method of the adapter busbar and the second battery cell group can refer to the connection method of the adapter busbar and the first battery cell group, that is, the second battery cell group also has a corresponding output pole busbar, and the adapter busbar is connected to the output pole busbar of the second battery cell group.

[0009] The output pole busbar is a functional component for realizing electrical connection. The output pole busbar and the adapter busbar are welded and fixed to realize the welded electrical connection between the output pole busbar and the adapter busbar. Since the adapter busbar is used to output the electrical energy of a specific battery cell, the output pole busbar can be used to realize the electrical connection between the adapter busbar and the specific battery cell according to demand, and the output pole busbar can also be used to perform signal sampling or other functions on the adapter busbar.

[0010] The output pole busbar is connected to at least one battery cell in the first battery cell group. The connection here may refer to the output pole busbar being directly or indirectly electrically connected to at least one battery cell in the first battery cell group. When the output pole busbar is connected to one or two battery cells, the series or parallel current of the first battery cell group may be output to the outside. The output pole busbar may simultaneously have the function of connecting two battery cells in series in the first battery cell group and the function of outputting the electric energy of the first battery cell group to the outside. When the output pole busbar is connected to more than three battery cells, it is used to output the parallel electric energy of the first battery cell group to the outside.

[0011] In this solution, the connection between the output pole busbar and the adapter busbar is welded. Compared with the related technology, the connection between the output pole busbar and the adapter busbar is bolted, which will increase the cost and reduce the assembly efficiency. In contrast, in this solution, on the one hand, the welding operation is easy, and the output pole base, box expansion beam, insulation protection cover and other structures can be omitted, which significantly reduces the assembly steps, saves assembly time, and can also save materials and reduce costs; on the other hand, welding does not need to consider the connection and fixation between the adapter busbar and the output pole base and other structures. In some embodiments, the output pole busbar and the adapter busbar can be made of the same material, which can improve the material consistency of all busbar components, facilitate production and manufacturing, and improve the stability of battery current conduction.

[0012] In some embodiments, the first battery cell group includes a first battery cell, the first battery cell has an output terminal, and the output busbar or the transfer busbar is welded and fixed to the output terminal.

[0013] In the technical solution of the embodiment of the present application, in the technical solution of the embodiment of the present application, the first battery cell refers to a special battery cell in the first battery cell group that needs to output electric energy to the outside or to other battery cell groups or battery cells.

[0014] In other words, similar to the definition of the adapter busbar, the output terminal of the first battery cell can also be understood to be of two types. In some embodiments, the output terminal can be used as the total output of the battery and as an electrode terminal for external connection. This solution does not limit the number of battery cell groups. In other embodiments, the output terminal can also be used as an electrode terminal for electrical connection between the first battery cell group and other battery cell groups.

[0015] Generally, the output terminals are often located at two ends of the battery corresponding to the stacking direction of the battery cells. Of course, in some embodiments, the output terminals may also be located in the middle of the stacking direction of the battery cells.

[0016] By welding and fixing the output pole busbar or the adapter busbar to the output terminal, two ways of outputting current can be obtained. One is that the output pole busbar is welded and fixed to the output terminal, and the adapter busbar is indirectly electrically connected to the output terminal through the output pole busbar, that is, the direction of current flow is output terminal-output pole busbar-adapter busbar, or adapter busbar-output pole busbar-output terminal. The other is that the adapter busbar is welded and fixed to the output terminal, which is a direct electrical connection method, and the adapter busbar directly outputs the current of the corresponding battery cell, or inputs current to the corresponding battery cell.

[0017] In some embodiments, the adapter bus is welded and fixed to the output terminal; the adapter bus is welded and fixed to the output terminal, and the adapter bus is located on the surface of the first battery cell group facing the first direction; the adapter bus and the output terminal are welded to form a first weld mark, and the adapter bus and the output terminal are welded to form a second weld mark, and the first weld mark and the second weld mark are completely misaligned along the first direction.

[0018] In the technical solution of the embodiment of the present application, the transfer busbar and the output terminal are electrically connected by direct welding. At this time, the output terminal busbar and the output terminal jointly define the setting position of the transfer busbar.

[0019] The transfer busbar is located on the surface of the first battery cell group facing the first direction, that is, on the side where the output terminal is located. By completely misaligning the first weld mark and the second weld mark in the first direction, the mutual influence between the first weld mark and the second weld mark can be reduced. The first weld mark and the second weld mark, whichever is closer to the first battery cell group, are welded first, and the surface of the obtained weld mark will be uneven to a certain extent. By not allowing the first weld mark and the second weld mark to completely overlap in projection in the first direction, the surface quality of the welding can be effectively improved. The weld mark farther away from the first battery cell group has a lower probability of defects or obvious defects, which is beneficial to improving the performance of the finished battery.

[0020] In some embodiments, along the first direction, a projection of the output bus bar does not overlap with a projection of the output terminal.

[0021] In the technical solution of the embodiment of the present application, along the first direction, the projection of the output pole busbar does not overlap with the projection of the output terminal, that is, each part of the output pole busbar is separated or misaligned from the output terminal, and the output pole busbar reserves the position and space for welding the adapter busbar and the output terminal, so that the welding process between the adapter busbar and the output terminal can proceed smoothly.

[0022] In addition, since the projection of the output busbar does not overlap with the projection of the output terminal, when the adapter busbar and the output terminal are directly welded, the problem of double-layer welding can be avoided, and the height of the output terminal and the adapter busbar is also reduced.

[0023] In some embodiments, the output busbar may be used to perform signal sampling or other functions on the transfer busbar.

[0024] In some embodiments, the output busbar is located on the surface of the first battery cell group facing the first direction. The battery further includes a bracket, at least part of which is disposed between the connection area of ​​the transfer busbar and the output busbar and the first battery cell group along the first direction.

[0025] In the technical solution of the embodiment of the present application, the bracket is a newly added structural component used to achieve heat insulation during the welding process.

[0026] Along the first direction, at least part of the bracket is arranged between the connection area of ​​the adapter busbar and the output pole busbar and the first battery cell group. On the one hand, along the first direction, the bracket will be closer to the first battery cell group than the output pole busbar, and at least part of the bracket will support the output pole busbar to provide a certain installation strength. On the other hand, the connection area between the adapter busbar and the output pole busbar is the overlapping part and welding part of the adapter busbar and the output pole busbar. The heat generated in this area is relatively large. Along the first direction, the projection of the connection area between the adapter busbar and the output pole busbar will fall on the bracket, and then when the adapter busbar and the output pole busbar are welded, the bracket can absorb part or even most of the heat, or can effectively isolate the heat, reduce the heat transferred to the first battery cell group, thereby protecting the first battery cell group and improving the overall performance of the battery cell group.

[0027] In some embodiments, a first positioning portion is disposed on the bracket, and a second positioning portion cooperating with the first positioning portion is disposed on the output pole busbar.

[0028] In the technical solution of the embodiment of the present application, the bracket will be closer to the battery cell group than the output pole busbar, and at least part of the bracket will support the output pole busbar. By respectively providing a first positioning portion and a second positioning portion on the bracket and the output pole busbar, the first positioning portion and the second positioning portion are matched and cooperated with each other, so that the relative position of the bracket and the output pole busbar can be determined, and the relative position of the output pole busbar and the first battery cell group can also be determined, so that the installation position of the output pole busbar is basically fixed, thereby reducing the probability of the output pole busbar being detached or displaced during welding.

[0029] In some embodiments, one of the first positioning portion and the second positioning portion may be a boss, and the other may be a groove or a receiving hole matching the boss.

[0030] In some embodiments, a third positioning portion is disposed on the bracket, and a fourth positioning portion cooperating with the third positioning portion is disposed on the transfer busbar.

[0031] In the technical solution of the embodiment of the present application, in order to position the adapter busbar, a third positioning portion is provided on the bracket, and a fourth positioning portion cooperating with the third positioning portion is provided on the adapter busbar, so that the relative position of the bracket and the adapter busbar can be determined, and the relative position of the adapter busbar and the first battery cell group can be determined, so that the relative position between the adapter busbar and the output pole busbar is basically fixed, thereby reducing the probability of the output pole busbar being detached or displaced.

[0032] Likewise, in some embodiments, one of the third positioning portion and the fourth positioning portion may be a boss, and the other may be a groove or a receiving hole matching the boss.

[0033] In some embodiments, the battery further comprises an isolating member, a recess is provided on a side of the isolating member facing away from the battery cell group, and at least a portion of the bracket is received in the recess.

[0034] The isolating member provides an installation location for the bracket and the output pole busbar. The isolating member is also a base for arranging and installing other important components such as the battery busbar component, circuit board assembly and other components. It is also a component that directly contacts the first battery cell group for insulation.

[0035] In the technical solution of the embodiment of the present application, in order to install and fix the bracket on the isolating member, a recess is provided on the side of the isolating member away from the first battery cell group, and at least part of the bracket is accommodated in the recess, that is, the bracket is provided on the side of the isolating member away from the first battery cell group. Since the bracket is closer to the first battery cell group than the output pole current collector, the output pole current collector is also provided on the side of the isolating member away from the first battery cell group. The bottom wall and side wall of the recess of the isolating member jointly define the installation position of the bracket and contact the bracket, thereby realizing the installation of the bracket.

[0036] In some embodiments, the battery further includes a circuit board and a sampling piece. The circuit board is disposed on the isolation piece, and the sampling piece is electrically connected to the circuit board and the output pole bus bar, respectively.

[0037] In the technical solution of the embodiment of the present application, the battery also includes a circuit board and a sampling component. The circuit board is also arranged on the isolation component, and the sampling component is electrically connected to the circuit board and the output pole busbar, respectively. The main function of the sampling component is to connect to the first battery cell group to perform signal sampling, including but not limited to voltage sampling and temperature sampling. The function of the circuit board is to transmit the sampling information of the sampling component to the signal collection and processing device of the battery. In this embodiment, the sampling component is electrically connected to the output pole busbar, and then the signal of the battery cell electrically connected to the output pole busbar and the corresponding adapter busbar can be sampled.

[0038] In some embodiments, the sampling member can collect voltage signals by being electrically connected to the first battery cell group. In some embodiments, the sampling member can also collect temperature signals by being in contact with the first battery cell group.

[0039] In some embodiments, the output busbar includes a first connection portion and a second connection portion, the first connection portion is electrically connected to the sampling member, and the second connection portion is welded and fixed to the transfer busbar.

[0040] In the technical solution of the embodiment of the present application, the output pole busbar includes a first connection portion electrically connected to the sampling member, and a second connection portion welded and fixed to the transfer busbar. Since the connection parts of the output pole busbar, the sampling member and the transfer busbar are different, the steps of assembling the first connection portion electrically connected to the sampling member and welding and fixing the second connection portion to the transfer busbar are independent of each other and do not affect each other. The electrical connection of the first connection portion to the sampling member and the assembly with the isolation member can be completed in advance in the previous assembly process. In the general assembly step of the battery, the second connection portion needs to be welded and fixed to the transfer busbar.

[0041] In some embodiments, the battery further includes an isolator, the isolator includes a first sub-isolator and a second sub-isolator, and along a thickness direction of the circuit board, the first sub-isolator and the second sub-isolator sandwich the circuit board.

[0042] In the technical solution of the embodiment of the present application, the battery also includes an isolator, which includes a first sub-isolator and a second sub-isolator. Along the thickness direction of the circuit board, the first sub-isolator and the second sub-isolator clamp the circuit board, and also clamp the output pole bus bar, that is, the isolator has a two-layer base structure, which further enhances the insulation effect.

[0043] In some embodiments, the first sub-spacer and the second sub-spacer are blister sheets.

[0044] In the technical solution of the embodiment of the present application, the first sub-isolator and the second sub-isolator are both blister sheets, that is, blister sheets formed by a blister forming process. The main principle of the blister forming process is to heat and soften the flat plastic hard sheet, and then use vacuum adsorption to the mold surface, and then it can be formed after cooling.

[0045] The materials that can be selected for the first sub-spacer and the second sub-spacer include but are not limited to the following: PC, PVC, PET, PP, PS, etc.

[0046] In some embodiments, the battery further includes a second battery cell group, and two ends of the transfer bus are respectively connected to the second battery cell group and the output bus.

[0047] When the battery has a first battery cell group and a second battery cell group, the first battery cell group and the second battery cell group need to be electrically connected so that all battery cells of the battery can be connected as a whole according to a preset electrical connection method. In this solution, the electrical connection between the first battery cell group and the second battery cell group is achieved through a transfer bus. Specifically, the two ends of the transfer bus are respectively connected to the second battery cell group and the output pole bus.

[0048] In some embodiments, the connection method between the adapter busbar and the second battery cell group can be an existing connection scheme; in some embodiments, the connection method between the adapter busbar and the second battery cell group can refer to the connection method between the adapter busbar and the first battery cell group, that is, the second battery cell group also has a corresponding output pole busbar, and the adapter busbar is connected to the output pole busbar of the second battery cell group.

[0049] In this case, the first battery cell group and the second battery cell group are generally arranged in two rows, and the length direction of the first battery cell group and the second battery cell group is roughly consistent with the stacking direction of the battery cells. When the second battery cell group also has a corresponding output pole busbar, the two output pole busbars are generally arranged in parallel. The two output pole busbars arranged in parallel are electrically connected by a adapter busbar, thereby realizing the electrical connection between the first battery cell group and the second battery cell group arranged in parallel.

[0050] In a third aspect, an electrical device is provided, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0051] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0054] Figure 2 A simplified schematic diagram of a battery provided for some embodiments of the present application.

[0055] Figure 3 A schematic diagram of the partial internal structure of a battery provided in some embodiments of the present application.

[0056] Figure 4 for Figure 3 A partial schematic diagram of the .

[0057] Figure 5 for Figure 3 Schematic diagram of the explosion.

[0058] Figure 6 for Figure 3 A partial cross-sectional view of .

[0059] Figure 7 A schematic diagram of the structure of a single battery cell of a battery provided in some embodiments of the present application.

[0060] Icon: 1000-vehicle; 100-battery; 200-motor; 300-controller; 10-housing; 11-first part; 12-second part; 20-battery cell; 21-housing; 22-electrode terminal; 23-electrode assembly; 24-end cap;

[0061] 110-first battery cell group; 111-first battery cell; 112-output pole terminal; 120-output pole busbar; 121-first connecting portion; 122-second connecting portion; 130-transfer busbar; 131-fourth positioning portion; 140-bracket; 141-first positioning portion; 142-third positioning portion; 150-isolating member; 151-recess; 160-circuit board; 170-sampling member; 180-second battery cell group; 191-first isolating assembly; 192-second isolating assembly; 193-busbar component. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0063] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0064] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0065] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0067] The term "multiple" as used in the present application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0068] In this application, the battery mentioned herein refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, etc.

[0069] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0070] For batteries, when assembling the batteries, it is necessary to connect the battery cell group and the components used for busbar electrical connection, so as to electrically connect multiple battery cells according to the set series, parallel or mixed connection scheme, and finally enable the power capacity of the battery cell group to be output and electrically connected to the outside. In the related art, the battery assembly scheme is relatively complex, involving more assembly structures, which increases the production cost and reduces the assembly efficiency.

[0071] Based on the above considerations, in order to take into account the requirements of simplification of the battery assembly solution, cost control and efficiency improvement. The present application designs a battery, including a first battery cell group, an output pole busbar and a transfer busbar. The first battery cell group includes a plurality of stacked battery cells. The output pole busbar is connected to at least one battery cell in the first battery cell group; the transfer busbar is welded and fixed to the output pole busbar, and the transfer busbar is used to electrically connect the first battery cell group and components outside the first battery cell group.

[0072] The adapter bus is a functional element for outputting the electrical energy of the first battery cell group. It should be noted that, in some embodiments, the adapter bus can be used as the total output of the battery for external connection; in other embodiments, the adapter bus can also be used to connect the two output pole busbars on the two battery cell groups of the battery, that is, to electrically connect two adjacent battery cell groups.

[0073] The output pole busbar is a functional component for realizing electrical connection. The output pole busbar and the adapter busbar are welded and fixed to realize the welded electrical connection between the output pole busbar and the adapter busbar. Since the adapter busbar is used to output the electrical energy of a specific battery cell, the output pole busbar can be used to realize the electrical connection between the adapter busbar and the specific battery cell according to demand, and the output pole busbar can also be used to perform signal sampling or other functions on the adapter busbar.

[0074] In this solution, the connection between the output pole busbar and the adapter busbar is welded. Compared with the related technology, the connection between the output pole busbar and the adapter busbar is bolted, which will increase the cost and reduce the assembly efficiency. In contrast, in this solution, on the one hand, the welding operation is easy, and the output pole base, box expansion beam, insulation protection cover and other structures can be omitted, which significantly reduces the assembly steps, saves assembly time, and can also save materials and reduce costs; on the other hand, welding does not need to consider the connection and fixation between the adapter busbar and the output pole base and other structures. In some embodiments, the output pole busbar and the adapter busbar can be made of the same material, which can improve the material consistency of all busbar components, facilitate production and manufacturing, and improve the stability of battery current conduction.

[0075] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system having the battery disclosed in the present application and the like to form the electrical device can be used, which is conducive to the promotion of the battery.

[0076] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0077] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0078] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery is provided inside the vehicle 1000, and the battery may be provided at the bottom, head or tail of the vehicle 1000. The battery may be used to power the vehicle 1000, for example, the battery may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 300 and a motor 200, and the controller 300 is used to control the battery to power the motor 200, for example, for starting, navigating and driving the vehicle 1000.

[0079] In some embodiments of the present application, the battery can be used not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0080] Please refer to Figure 2 , Figure 2 An exploded diagram of a battery provided for some embodiments of the present application. The battery includes a box body 10 and a battery cell 20, and the battery cell 20 is contained in the box body 10. Among them, the box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0081] In the battery, there can be multiple battery cells 20, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery can also include other structures, for example, the battery can also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0082] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0083] like Figure 7 As shown, the battery cell 20 may include a housing, an electrode assembly 23 and an electrode terminal 22. The housing includes a shell 21 and an end cap 24, the shell 21 has an opening, and the end cap 24 closes the opening to isolate the internal environment of the battery cell 20 from the external environment.

[0084] The shell 21 is a component used to cooperate with the end cap 24 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte and other components. The shell 21 and the end cap 24 can be independent components. The shell 21 can be of various shapes and sizes. Specifically, the shape of the shell 21 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 21 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0085] The end cap 24 refers to a component that covers the opening of the shell 21 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 24 can be adapted to the shape of the shell 21 to match the shell 21. Optionally, the end cap 24 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 24 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals 22 can be provided on the end cap 24. The electrode terminal 22 can be used to electrically connect to the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20. The material of the end cap 24 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose special restrictions on this. In some embodiments, an insulating structure can also be provided on the inner side of the end cap 24, and the insulating structure can be used to isolate the electrical connection components in the shell 21 from the end cap 24 to reduce the risk of short circuit. Exemplarily, the insulating structure may be plastic, rubber, or the like.

[0086] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be included in the housing 21. The electrode assembly 23 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 23, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear. The positive pole ear and the negative pole ear may be located together at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal 22 to form a current loop.

[0087] In some embodiments, the battery cell 20 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value.

[0088] According to some embodiments of the present application, Figure 3 to Figure 5 As shown, the present application provides a battery 100 including a first battery cell group 110 . The first battery cell group 110 includes a plurality of stacked battery cells 20 .

[0089] like Figure 3 As shown, the stacking direction of the plurality of battery cells 20 is the X direction. The plurality of stacked battery cells 20 constitute the first battery cell group 110. The number of battery cells 20 and the electrical connection method can be selected in many ways, and the voltage and capacity of the corresponding battery 100 can also be designed in many ways, and can be laid out according to actual needs.

[0090] The battery 100 further includes an output bus bar 120 connected to at least one battery cell 20 in the first battery cell group 110 .

[0091] The output pole busbar 120 is a functional component for electrical connection. The output pole busbar 120 is connected to at least one battery cell 20 in the first battery cell group 110. The connection here may refer to the output pole busbar 120 being directly or indirectly electrically connected to at least one battery cell 20 in the first battery cell group 110. When the output pole busbar 120 is connected to one or two battery cells 20, the series or parallel current of the first battery cell group 110 may be output to the outside. The output pole busbar 120 may simultaneously have the function of connecting two battery cells 20 of the first battery cell group 110 in series and the function of outputting the electric energy of the first battery cell group 110 to the outside. When the output pole busbar 120 is connected to more than three battery cells 20, it is used to output the parallel electric energy of the first battery cell group 110 to the outside.

[0092] The battery 100 further includes a transfer busbar 130 , which is fixed to the output busbar 120 by welding.

[0093] The transfer bus 130 is a functional element for outputting the electric energy of the first battery cell group 110, and is used to electrically connect the first battery cell group 110 with components other than the first battery cell group 110. It should be noted that in some embodiments, the transfer bus 130 can be used as the total output of the battery 100 for external connection; in other embodiments, the battery 100 may also include a second battery cell group 180, and the transfer bus 130 may also be used to connect the first battery cell group 110 and the second battery cell group 180 of the battery 100, that is, to electrically connect two adjacent battery cell groups. This solution does not limit whether the battery 100 has a second battery cell group 180, a third battery cell group, etc. in addition to the first battery cell group 110, nor does it limit the number of output pole busbars 120 and adapter busbars 130. In some embodiments, there can be multiple adapter busbars 130, and a part of the adapter busbars 130 can be used as the total output of the battery 100 and for external connection, and the other part of the adapter busbars 130 can be used to electrically connect two adjacent battery cell groups.

[0094] When the battery 100 has a second battery cell group 180 in addition to the first battery cell group 110, the two ends of the adapter bus 130 are respectively connected to the second battery cell group 180 and the output pole bus 120 connected to the first battery cell group 110. In some embodiments, the connection method of the adapter bus 130 and the second battery cell group 180 can be an existing connection scheme; in some embodiments, the connection method of the adapter bus 130 and the second battery cell group 180 can refer to the connection method of the adapter bus 130 and the first battery cell group 110, that is, the second battery cell group 180 also has a corresponding output pole bus 120, and the adapter bus 130 is connected to the output pole bus 120 of the second battery cell group 180.

[0095] In the above scheme, the output pole bus 120 and the adapter bus 130 are welded and fixed to realize the welded electrical connection between the output pole bus 120 and the adapter bus 130. Since the adapter bus 130 is used to output the electrical energy of a specific battery cell 20, the output pole bus 120 can be used to realize the electrical connection between the adapter bus 130 and the specific battery cell 20 as needed, and the output pole bus 120 can also be used to perform signal sampling or other functions on the adapter bus 130.

[0096] The connection between the output pole bus 120 and the transfer bus 130 is welded. Compared with the related art, the connection between the output pole bus 120 and the transfer bus 130 is bolted, which increases the cost and reduces the assembly efficiency. In contrast, in this solution, on the one hand, the welding operation is easy, and the output pole base, the expansion beam of the box 10, the insulating protective cover and other structures can be omitted, which significantly reduces the assembly steps, saves assembly time, and can also save materials and reduce costs; on the other hand, welding does not need to consider the connection and fixation between the transfer bus 130 and the output pole base and other structures. In some embodiments, the output pole bus 120 and the transfer bus 130 can be made of the same material, which can improve the material consistency of all bus components, facilitate production and manufacturing, so as to improve the stability of current conduction of the battery 100.

[0097] According to some embodiments of the present application, Figure 4 As shown, in order to facilitate welding of the adapter busbar 130 and the output pole busbar 120, the adapter busbar 130 overlaps the output pole busbar 120, and in the overlapping area, the adapter busbar 130 is farther away from the first battery cell group 110 than the output pole busbar 120. Furthermore, a through hole can be opened in the portion where the adapter busbar 130 overlaps the output pole busbar 120, and the adapter busbar 130 and the output pole busbar 120 are welded through the through hole.

[0098] According to some embodiments of the present application, the first battery cell group 110 includes a first battery cell 111 , the first battery cell 111 has an output terminal 112 , and the output busbar 120 or the transfer busbar 130 is welded and fixed to the output terminal 112 .

[0099] like Figure 7 As shown, the first battery cell 111 refers to a special battery cell 20 in the first battery cell group 110 that needs to output electric energy to the outside or to other battery cell groups.

[0100] like Figure 7 As shown, along the Z direction, the transfer busbar 130 is disposed on a side where the output terminal 112 of the battery cell group 110 is located.

[0101] In other words, similar to the definition of the adapter bus 130, the output terminal 112 of the first battery cell 111 can also be understood to be of two types. In some embodiments, the output terminal 112 can be used as the total output of the battery 100 and the electrode terminal 22 for external connection. This solution does not limit the number of battery cell groups. In other embodiments, the output terminal 112 can also be used as the electrode terminal 22 for electrical connection between the first battery cell group 110 and other battery cell groups.

[0102] Generally, the first battery cell 111 and the output terminal 112 are commonly found at two ends of the battery 100 corresponding to the stacking direction of the battery cells 20. Of course, in some embodiments, the first battery cell 111 and the output terminal 112 may also be located in the middle of the stacking direction of the battery cells 20.

[0103] In the above scheme, by welding and fixing the output pole busbar 120 or the adapter busbar 130 to the output terminal 112, two ways of outputting current can be obtained. One is that the output pole busbar 120 is welded and fixed to the output terminal 112, and the adapter busbar 130 is indirectly electrically connected to the output terminal 112 through the output pole busbar 120, that is, the direction of current flow is output terminal 112-output pole busbar 120-adapter busbar 130, or adapter busbar 130-output pole busbar 120-output terminal 112. The other is that the adapter busbar 130 is welded and fixed to the output terminal 112, which is a direct electrical connection method, and the adapter busbar 130 directly outputs the current of the corresponding battery cell 20, or inputs current to the corresponding battery cell 20.

[0104] According to some embodiments of the present application, in order to facilitate welding and fixing of the adapter bus 130 and the output terminal 112, a through hole can be opened along the Z direction on the area of ​​the adapter bus 130 opposite to the output terminal 112, and the adapter bus 130 and the output terminal 112 are welded through the through hole.

[0105] According to some embodiments of the present application, the adapter bus 130 is welded and fixed to the output terminal 112, and the adapter bus 130 is located on the surface of the first battery cell group 110 facing the first direction; the adapter bus 130 and the output terminal 112 are welded to form a first weld mark, and the adapter bus 130 and the output terminal bus 120 are welded to form a second weld mark, and the first weld mark and the second weld mark are completely misaligned along the first direction.

[0106] In the above technical solution, the transfer busbar 130 and the output terminal 112 are electrically connected by direct welding. At this time, the output terminal 120 and the output terminal 112 jointly define the setting position of the transfer busbar 130 .

[0107] The transfer busbar 130 is located on the surface of the first battery cell group 110 facing the first direction, that is, on the side where the output terminal is located. By completely misaligning the first weld mark and the second weld mark in the first direction, the mutual influence between the first weld mark and the second weld mark can be reduced. The first weld mark and the second weld mark, whichever is closer to the first battery cell group 110, is welded first, and the surface of the obtained weld mark will be uneven to a certain extent. By not allowing the first weld mark and the second weld mark to completely overlap in projection in the first direction, the surface quality of the welding can be effectively improved. The weld mark farther away from the first battery cell group 110 has a lower probability of defects or obvious defects, which is beneficial to improving the finished product performance of the battery 100.

[0108] According to some embodiments of the present application, along the first direction, the projection of the output bus bar 120 does not overlap with the projection of the output terminal 112 .

[0109] like Figure 3 As shown, the first direction is the Z direction.

[0110] In the technical solution of the embodiment of the present application, along the first direction, the projection of the output pole bus 120 does not overlap with the projection of the output terminal 112, that is, each part of the output pole bus 120 is separated or misaligned from the output terminal 112, and the output pole bus 120 reserves a position and space for welding the adapter bus 130 and the output terminal 112, so that the welding process between the adapter bus 130 and the output terminal 112 can proceed smoothly.

[0111] In addition, since the projection of the output pole bus 120 does not overlap with the projection of the output terminal 112, when the adapter bus 130 and the output terminal 112 are directly welded, the problem of double-layer welding can be avoided, and the height of the output terminal 112 and the adapter bus 130 is also reduced.

[0112] In some embodiments, the output busbar 120 may be used to perform signal sampling or other functions on the transfer busbar 130 .

[0113] According to some embodiments of the present application, compared with the bolt fixing solution, the output pole base and other structures have been omitted, so the connection position of the output pole busbar 120 and the adapter busbar 130 is closer to the first battery cell group 110, or even located above the first battery cell group 110. In order to further save costs and reduce the space occupied by the output pole busbar 120 and the adapter busbar 130, in this embodiment, Figure 3 As shown, along the first direction, the projection of the connection area between the transfer bus 130 and the output bus 120 can fall on the first battery cell group 110. At this time, the size of the entire battery 100 along the X direction can be controlled to a certain extent, which is conducive to controlling or improving the energy density of the battery 100.

[0114] It should be noted that if Figure 3-Figure 5 The adapter busbar 130 shown is a bent and sunken structure in order to avoid other structures of the battery 100. If there is no structure in the battery 100 that needs to be avoided, the adapter busbar 130 can be a structure that extends flat along the Y direction and does not need to extend along the X direction and then sink and bend.

[0115] According to some embodiments of the present application, the output busbar 120 is located on the surface of the first battery cell group 110 facing the first direction. The battery 100 further includes a bracket 140, and along the first direction, at least a portion of the bracket 140 is disposed between the connection area of ​​the transfer busbar 130 and the output busbar 120 and the first battery cell group 110.

[0116] In the technical solution of the embodiment of the present application, the bracket 140 is a newly added structural component used to achieve heat insulation during the welding process.

[0117] Along the first direction, at least a portion of the bracket 140 is disposed between the connection area between the adapter bus 130 and the output pole bus 120 and the first battery cell group 110. On the one hand, along the first direction, the bracket 140 is closer to the first battery cell group 110 than the output pole bus 120, and at least a portion of the bracket 140 supports the output pole bus 120 to provide a certain installation strength. On the other hand, the connection area between the adapter bus 130 and the output pole bus 120 is the connection area between the adapter bus 130 and the output pole bus 120. The overlapping parts and welding parts of the busbar 120 generate relatively large amounts of heat. Along the first direction, the projection of the connection area between the adapter busbar 130 and the output pole busbar 120 will fall on the bracket 140. Therefore, when the adapter busbar 130 and the output pole busbar 120 are welded, the bracket 140 can absorb part or even most of the heat, or can effectively insulate the heat and reduce the heat transferred to the first battery cell group 110, thereby protecting the first battery cell group 110 and improving the overall performance of the battery cell group.

[0118] According to some embodiments of the present application, a first positioning portion 141 is disposed on the bracket 140 , and a second positioning portion cooperating with the first positioning portion 141 is disposed on the output bus bar 120 .

[0119] In the technical solution of the embodiment of the present application, the bracket 140 will be closer to the battery cell group than the output pole busbar 120, and at least a part of the bracket 140 will support the output pole busbar 120. By respectively providing a first positioning portion 141 and a second positioning portion on the bracket 140 and the output pole busbar 120, the first positioning portion 141 and the second positioning portion are matched and cooperated with each other, so that the relative position of the bracket 140 and the output pole busbar 120 can be determined, and the relative position of the output pole busbar 120 and the first battery cell group 110 can also be determined, so that the installation position of the output pole busbar 120 is basically fixed, thereby reducing the probability of the output pole busbar 120 detaching or displacing during welding.

[0120] In some embodiments, one of the first positioning portion 141 and the second positioning portion may be a boss, and the other may be a groove or a receiving hole matching the boss.

[0121] According to some embodiments of the present application, a third positioning portion 142 is disposed on the bracket 140 , and a fourth positioning portion 131 cooperating with the third positioning portion 142 is disposed on the transfer bus 130 .

[0122] In the technical solution of the embodiment of the present application, Figure 5 As shown, in order to position the adapter bus 130, a third positioning portion 142 is provided on the bracket 140, and a fourth positioning portion 131 cooperating with the third positioning portion 142 is provided on the adapter bus 130, so that the relative position of the bracket 140 and the adapter bus 130 can be determined, and the relative position of the adapter bus 130 and the first battery cell group 110 can also be determined, so that the relative position between the adapter bus 130 and the output pole bus 120 is basically fixed, thereby reducing the probability of the output pole bus 120 being detached or displaced.

[0123] Likewise, in some embodiments, one of the third positioning portion 142 and the fourth positioning portion 131 may be a boss, and the other may be a groove or a receiving hole matching the boss.

[0124] According to some embodiments of the present application, the battery 100 further includes an isolating member 150 . A recess 151 is disposed on a side of the isolating member 150 facing away from the battery cell group. At least a portion of the bracket 140 is received in the recess 151 .

[0125] The isolation member 150 provides an installation position for the bracket 140 and the output pole busbar 120. The isolation member 150 is also a base for arranging and installing other important components such as the busbar component 193 of the battery 100, the circuit board 160 assembly and other components, and is also a component that directly contacts the first battery cell group 110 for insulation.

[0126] A recess 151 is disposed on a side of the spacer 150 facing away from the first battery cell group 110 , and at least a portion of the bracket 140 is received in the recess 151 .

[0127] In the technical solution of the embodiment of the present application, in order to install and fix the bracket 140 on the isolation member 150, a recess 151 is provided on the side of the isolation member 150 away from the first battery cell group 110. Figure 5-Figure 6 As shown, at least part of the bracket 140 is accommodated in the recess 151, that is, the bracket 140 is arranged on the side of the spacer 150 away from the first battery cell group 110. Since the bracket 140 is closer to the first battery cell group 110 than the output pole busbar 120, the output pole busbar 120 is also arranged on the side of the spacer 150 away from the first battery cell group 110. The bottom wall and the side wall of the recess 151 of the spacer 150 jointly define the installation position of the bracket 140 and contact with the bracket 140, thereby realizing the installation of the bracket 140.

[0128] According to some embodiments of the present application, at least a portion of the output busbar 120 may also be accommodated in the recess 151 , thereby fully utilizing the thickness of the isolation member 150 and effectively controlling the total thickness of the battery 100 .

[0129] According to some embodiments of the present application, the battery 100 further includes a circuit board 160 and a sampling member 170 . The circuit board 160 is disposed on the isolation member 150 , and the sampling member 170 is electrically connected to the circuit board 160 and the output busbar 120 , respectively.

[0130] The main function of the sampling member 170 is to connect with the battery cell group to perform signal sampling, including but not limited to voltage sampling and temperature sampling.

[0131] The function of the circuit board 160 is to transmit the sampling information of the sampling component 170 to the signal collection and processing device of the battery 100 .

[0132] In the above technical solution, the battery 100 also includes a circuit board 160 and a sampling component 170. The circuit board 160 is also arranged on the isolation component 150, and the sampling component 170 is electrically connected to the circuit board 160 and the output pole bus 120 respectively. The main function of the sampling component 170 is to connect with the first battery cell group 110 to perform signal sampling, including but not limited to voltage sampling and temperature sampling. The function of the circuit board 160 is to transmit the sampling information of the sampling component 170 to the signal collection and processing device of the battery 100. In this embodiment, the sampling component 170 is electrically connected to the output pole bus 120, and then the signal of the battery cell 20 electrically connected to the output pole bus 120 and the corresponding adapter bus 130 can be sampled.

[0133] In some embodiments, the sampling member 170 may collect voltage signals by being electrically connected to the first battery cell group 110 . In some embodiments, the sampling member 170 may collect temperature signals by being in contact with the first battery cell group 110 .

[0134] According to some embodiments of the present application, the output busbar 120 includes a first connection portion 121 and a second connection portion 122 , the first connection portion 121 is electrically connected to the sampling member 170 , and the second connection portion 122 is welded and fixed to the transfer busbar 130 .

[0135] The first connection portion 121 and the second connection portion 122 are both partial structures of the output bus bar 120 .

[0136] In the above technical solution, the output pole busbar 120 includes a first connection portion 121 electrically connected to the sampling member 170, and a second connection portion 122 welded and fixed to the transfer busbar 130. Since the connection parts of the output pole busbar 120, the sampling member 170 and the transfer busbar 130 are different, the steps of assembling the electrical connection between the first connection portion 121 and the sampling member 170 and welding and fixing the second connection portion 122 and the transfer busbar 130 are independent of each other and do not affect each other. The electrical connection between the first connection portion 121 and the sampling member 170 is completed in the isolation member integrated assembly process. In the general assembly step of the battery 100, the second connection portion 122 needs to be welded and fixed to the transfer busbar 130.

[0137] According to some embodiments of the present application, the battery 100 further includes an isolator 150 , which includes a first sub-isolator and a second sub-isolator, and along the thickness direction of the circuit board 160 , the first sub-isolator and the second sub-isolator clamp the circuit board 160 .

[0138] In the technical solution of the embodiment of the present application, the battery 100 further includes an isolator, and the isolator assembly includes a first sub-isolator and a second sub-isolator. Along the thickness direction of the circuit board 160, the first sub-isolator and the second sub-isolator sandwich the circuit board 160 and also sandwich the output pole bus 120. Since the isolator assembly is a two-layer base structure, the insulation effect is further enhanced.

[0139] According to some embodiments of the present application, the first sub-isolator is closer to the first battery cell group 110 than the second sub-isolator, and the recess 151, the bracket 140 and the output pole bus 120 are all arranged on the first sub-isolator and are all located on the side of the first sub-isolator away from the first battery cell group 110.

[0140] A receiving groove for receiving and installing the current collecting member 193 is also provided on one side of the first sub-separator away from the first battery cell group 110, which is not shown in the figure. In some embodiments, a positioning structure for positioning the current collecting member 193 may also be provided in the receiving groove.

[0141] According to some embodiments of the present application, the first sub-isolator and the second sub-isolator are blister sheets.

[0142] In the above technical solution, the first sub-isolator and the second sub-isolator are both blister sheets, that is, blister sheets formed by blister forming process. The main principle of blister forming process is to heat and soften the flat plastic hard sheet, and then use vacuum adsorption to the mold surface, and then it can be formed after cooling.

[0143] The materials that can be selected for the first sub-spacer and the second sub-spacer include but are not limited to the following: PC, PVC, PET, PP, PS, etc.

[0144] According to some embodiments of the present application, the battery 100 further includes a second battery cell group 180 , and two ends of the transfer bus 130 are respectively connected to the second battery cell group 180 and the output bus 120 .

[0145] When the battery 100 has a first battery cell group 110 and a second battery cell group 180, it is necessary to electrically connect the first battery cell group 110 and the second battery cell group 180 so that all the battery cells 20 of the battery 100 can be connected as a whole according to a preset electrical connection method. In this solution, the electrical connection between the first battery cell group 110 and the second battery cell group 180 is achieved through the adapter bus 130. Specifically, the two ends of the adapter bus 130 are respectively connected to the second battery cell group 180 and the output pole bus 120.

[0146] In some embodiments, the connection method between the adapter bus 130 and the second battery cell group 180 can be an existing connection scheme; in some embodiments, the connection method between the adapter bus 130 and the second battery cell group 180 can refer to the connection method between the adapter bus 130 and the first battery cell group 110, that is, the second battery cell group 180 also has a corresponding output pole bus 120, and the adapter bus 130 is connected to the output pole bus 120 of the second battery cell group 180.

[0147] In this case, the first battery cell group 110 and the second battery cell group 180 are generally arranged in two rows, and the length direction of the first battery cell group 110 and the second battery cell group 180 is roughly consistent with the stacking direction of the battery cell 20. When the second battery cell group 180 also has a corresponding output pole bus 120, the two output pole buss 120 are generally arranged in parallel. The two output pole buss 120 arranged in parallel are electrically connected through the adapter bus 130, thereby realizing the electrical connection of the first battery cell group 110 and the second battery cell group 180 arranged in parallel.

[0148] According to some embodiments of the present application, the battery 100 further includes an isolation component, which is disposed on one side of the first battery cell group 110. The isolation component includes an isolation member 150, a converging member 193, a circuit board 160, and a sampling member 170, etc. The isolation component has been assembled before being assembled with the battery cell group, and only needs to be connected with other components such as the battery cell group. In some embodiments, there can be only one isolation component, or there can be multiple sub-isolation components, for example, including a first isolation component 191, a second isolation component 192, etc. The number of sub-isolation components should be no less than the number of battery cell groups, and can be consistent with the number of battery cell groups.

[0149] In some embodiments, the isolation assembly can be connected and assembled during the general assembly process of the battery 100, for example, the battery cell group and the isolation member 150 are placed in sequence along the first direction, and then the output pole busbar 120, the transfer busbar 130, the busbar component 193, the circuit board 160, the sampling sheet and other structures are placed on the isolation member 150. In some other embodiments, the isolation assembly can also be pre-assembled, and when the battery cell group and the isolation assembly are finally assembled, they only need to be electrically connected and fixed accordingly.

[0150] According to some embodiments of the present application, the output pole busbar 120 can be pre-integrated and assembled on the isolation assembly. Specifically, the output pole busbar 120 is arranged on the isolation assembly 150. When the isolation assembly is assembled with the first battery cell group 110, the output pole busbar 120 is welded and fixed to the transfer busbar 130. The isolation assembly 150 provides an installation position for the output pole busbar 120. The isolation assembly 150 is also the base for arranging other important components of the isolation assembly, such as the busbar component 193, the circuit board 160 assembly, and the like, and is also a component that directly contacts the battery cell 20 for insulation.

[0151] The current collecting member 193 is a functional element for electrically connecting a plurality of sequentially stacked battery cells 20 into one, and the circuit board 160 assembly is used to collect voltage signals, temperature signals, etc. of the battery 100 .

[0152] The isolation assembly is pre-assembled before the general assembly process of the battery 100 and is an integral component. The isolation assembly is directly placed on one side of the first battery cell group 110 to insulate and protect the first battery cell group 110. Multiple battery cells 20 are connected in series, in parallel, or in mixed connection through the current collecting component 193 of the isolation assembly, or multiple battery cells 20 are connected in series, in parallel, or in mixed connection through the current collecting component 193, the output pole current collecting component 120, and the transfer collecting component 130 to obtain a module with the required voltage and capacity.

[0153] The output pole bus 120 can be understood as a functional component in the isolation assembly. The output pole bus 120 is welded and fixed to the adapter bus 130 to achieve an electrical connection between the output pole bus 120 and the adapter bus 130. Since the adapter bus 130 is used to output the electrical energy of a specific battery cell 20, the output pole bus 120 can be used to achieve an electrical connection between the adapter bus 130 and the specific battery cell 20 as needed, and the output pole bus 120 can also be used to perform signal sampling or other functions on the adapter bus 130.

[0154] According to some embodiments of the present application, the present application further provides an electrical device, which includes the battery 100 as described above, and the battery 100 is used to provide electrical energy.

[0155] According to some embodiments of the present application, Figure 3-Figure 5 As shown, the present application provides a battery 100, including a first battery cell group 110, a second battery cell group 180, an isolation assembly and a transfer bus 130. The isolation assembly includes a first isolation assembly 191 and a second isolation assembly 192.

[0156] The first battery cell group 110 and the second battery cell group 180 are arranged side by side along the Y direction, and the first cell group and the second battery cell group 180 both include a plurality of battery cells 20 stacked along the X direction (only some of the battery cells 20 at one end in the X direction are shown in the figure). The first isolation assembly 191 and the second isolation assembly 192 are also arranged side by side along the Y direction, and the length directions of the first isolation assembly 191 and the second isolation assembly 192 are both in the X direction, and the first isolation assembly 191 and the second isolation assembly 192 are located on one side of the first battery cell group 110 and the second battery cell group 180.

[0157] The structures of the first isolation component 191 and the second isolation component 192 are basically the same. Taking the first isolation component 191 as an example, the first isolation component 191 includes a first sub-isolator (i.e., the isolation component 150 in the figure), a second sub-isolator (omitted in the figure), a circuit board 160, a sampling component 170, a collector component 193, a bracket 140 and an output pole collector 120. Along the Z direction, the first sub-isolator and the second sub-isolator clamp the circuit board 160, the sampling component 170, the collector component 193, the bracket 140 and the output pole collector 120. The first sub-isolator is closer to the first battery cell group 110 and the second battery cell group 180 than the second sub-isolator. The circuit board 160, the collector component 193, the bracket 140 and the output pole collector 120 are all arranged on the first sub-isolator and are all located on the side of the first sub-isolator away from the first battery cell group 110. The first sub-isolator is provided with a recess 151 for accommodating the bracket 140. Along the thickness direction of the isolation assembly, that is, the Z direction, the bracket 140 is located between the isolation member 150 and the output pole collector 120. Two first positioning portions 141 are provided on the bracket 140. The first positioning portion 141 is a cylindrical boss. The output pole collector 120 is provided with a second positioning portion matching the first positioning portion 141, and the second positioning portion is a through circular hole. The bracket 140 is also provided with a third positioning portion 142 which is also a cylindrical boss. The output busbar 120 is provided with a fourth positioning portion 131 which matches the third positioning portion 142 and is also a round hole for accommodating the third positioning portion 142 .

[0158] In this embodiment, in order to simplify manufacturing and save materials, one of the two first positioning portions 141 is used to cooperate with the second positioning portion and the fourth positioning portion 131 at the same time, that is, after passing through the output pole busbar 120, it cooperates with the transfer busbar 130 for positioning. At this time, the first positioning portion 141 and the third positioning portion 142 have the same structure.

[0159] The first battery cell group 110 and the second battery cell group 180 both have corresponding output terminals 112, and the adapter busbar 130 is welded and fixed to the output terminal 112 and the output pole busbar 120, respectively. Along the Z direction, the projection of the welding area of ​​the adapter busbar 130 and the output pole busbar 120 falls on the battery cell 20 to control the overall size of the battery 100 along the X direction. At the same time, the projection of the welding area of ​​the adapter busbar 130 and the output pole busbar 120 also falls on the bracket 140, so that the heat generated by the welding of the adapter busbar 130 and the output pole busbar 120 is effectively isolated by the bracket 140, reducing the impact of welding on the battery cell 20.

[0160] The sampling member 170 is used to sample the voltage of the battery cell 20 corresponding to the output terminal 112. The sampling member 170 is electrically connected to the circuit board 160 and the output bus 120 respectively. Since the output bus 120 is welded to the transfer bus 130, the output bus is welded to the output terminal 112, thereby realizing voltage sampling. For example, the sampling member 170 and the output bus 120 can be welded.

[0161] Along the X direction, the total output busbar located opposite to the adapter busbar 130 can adopt a conventional existing scheme structure, or can adopt the scheme of the output pole busbar 120 and the adapter busbar 130 in this application. It is not shown in the figure and will not be described here. Please refer to the previous records.

[0162] According to a battery 100 and an electrical device of the present application, the overall assembly scheme of the battery 100 can be effectively simplified and the assembly cost can be reduced. At the same time, the overall assembly time of the battery 100 can be effectively shortened and the assembly efficiency can be improved to a certain extent.

[0163] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: A first battery cell group, comprising a plurality of stacked battery cells; an output pole busbar connected to at least one battery cell in the first battery cell group; The transfer busbar is used to electrically connect the first battery cell group and components other than the first battery cell group, and the transfer busbar is welded and fixed to the output pole busbar.

2. The battery according to claim 1, characterized in that The first battery cell group includes a first battery cell, the first battery cell has an output terminal, and the transfer busbar or the output terminal busbar is welded and fixed to the output terminal.

3. The battery according to claim 2, characterized in that The transfer busbar is welded and fixed to the output terminal, and the transfer busbar is located on a surface of the first battery cell group facing a first direction; The transfer busbar and the output terminal are welded to form a first weld mark, and the transfer busbar and the output terminal are welded to form a second weld mark, and the first weld mark and the second weld mark are completely misaligned along the first direction.

4. The battery according to claim 3, characterized in that Along the first direction, a projection of the output bus bar does not overlap with a projection of the output terminal.

5. The battery according to any one of claims 1 to 4, characterized in that The battery further includes a bracket, the output pole busbar is located on a surface of the first battery cell group facing a first direction, and along the first direction, at least a portion of the bracket is disposed between a connection area between the output pole busbar and the transfer busbar and the first battery cell group.

6. The battery according to claim 5, characterized in that The bracket is provided with a first positioning portion, and the output pole busbar is provided with a second positioning portion matched with the first positioning portion.

7. The battery according to claim 6, characterized in that The bracket is provided with a third positioning portion, and the transfer busbar is provided with a fourth positioning portion matched with the third positioning portion.

8. The battery according to claim 5, characterized in that The battery further includes an isolating member, a side of the isolating member facing away from the first battery cell group is provided with a recess, and at least a portion of the bracket is received in the recess.

9. The battery according to any one of claims 1 to 4, characterized in that The battery further comprises a circuit board and a sampling piece, wherein the sampling piece is electrically connected to the circuit board and the output pole current collecting piece respectively.

10. The battery according to claim 9, characterized in that The output busbar comprises a first connection portion and a second connection portion, the first connection portion is electrically connected to the sampling member, and the second connection portion is welded and fixed to the transfer busbar.

11. The battery according to claim 9, characterized in that The battery further includes a separator, wherein the separator includes a first sub-separator and a second sub-separator, and along a thickness direction of the circuit board, the first sub-separator and the second sub-separator sandwich the circuit board.

12. The battery according to claim 11, characterized in that The first sub-isolating member and the second sub-isolating member are blister sheets.

13. The battery according to any one of claims 1 to 4, characterized in that The battery further includes a second battery cell group, and two ends of the transfer busbar are respectively connected to the second battery cell group and the output busbar.

14. An electrical device, characterized in that: A battery comprising any one of claims 1 to 13, wherein the battery is used to provide electrical energy.

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