Battery device and electric device

Abstract

The invention is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises a high-voltage box and two battery modules distributed along a first direction, and each battery module comprises a plurality of single batteries arranged in an array; in any battery module, each column of battery monomers are arranged along a first direction, and each row of battery monomers are arranged along a second direction; the anodes and cathodes of all the single batteries in the same column are distributed in the same way, and the anodes and cathodes of the single batteries in adjacent columns are distributed oppositely; all the battery monomers of the two battery modules are electrically connected to form a total positive output electrode and a total negative output electrode; the total positive output electrode and the total negative output electrode are respectively arranged on the two battery modules and are arranged on the two adjacent battery monomers along the first direction, and the total positive output electrode and the total negative output electrode are respectively connected with the high-voltage box through the output busbar. According to the battery device and the power utilization device provided by the invention, the space utilization rate of the battery device can be improved.

Description

Technical Field

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

[0002] In the current high-voltage connection technology, the total positive output pole and the total negative output pole used to connect to the high-voltage box in the battery module are located at the two ends of the same row or column of the battery module. The total positive output pole and the total negative output pole need to be connected to the high-voltage box in the battery device through the conversion of long copper bars or long aluminum bars. The existence of long copper bars or long aluminum bars will occupy the internal space of the battery device and reduce the space utilization rate of the battery device. Summary of the invention

[0003] In view of the above problems, the present application provides a battery device and an electrical device, aiming to improve the space utilization of the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, comprising a high voltage box and two battery modules distributed along a first direction, each battery module comprising a plurality of battery cells arranged in an array, and the positive and negative electrodes of any battery cell are spaced apart along the first direction; in any battery module, each column of battery cells are arranged along the first direction, and each row of battery cells are arranged along the second direction, and the second direction is arranged crosswise with the first direction; in any battery module, the positive and negative electrode distributions of all battery cells in the same column are the same, and the positive and negative electrode distributions of battery cells in adjacent columns are opposite; all battery cells of the two battery modules are electrically connected to form a total positive output electrode and a total negative output electrode; the total positive output electrode and the total negative output electrode are respectively arranged on the two battery modules, and on two battery cells adjacent to each other along the first direction; the high voltage box and the battery cells are spaced apart in the second direction, and the positive and negative electrodes of the high voltage box are spaced apart in the first direction, and the total positive output electrode and the total negative output electrode are respectively connected to the high voltage box through an output bus; the output bus is a rigid member. The battery device also includes a box body, in which the high-voltage box and the battery module are both arranged. At least one expansion beam is provided in the box body, and the expansion beam is arranged along a first direction. Both ends of the expansion beam in the first direction are connected to the side walls of the box body, and one of the expansion beams is located between the high-voltage box and the battery module, and the battery module is abutted against the expansion beam.

[0005] The battery device provided by the embodiment of the present application changes the connection mode of the battery cells in the battery device, so that the total positive output electrode and the total negative output electrode of the battery module formed by all the battery cells are located on two adjacent battery cells, and are no longer located at the two ends of the same row, so that the spacing between the total positive output electrode and the total negative output electrode is smaller, so that the high-voltage box can be placed adjacent to the total positive output electrode and the total negative output electrode, so that the length of the output bus between the high-voltage box and the total positive output electrode and / or the total negative output electrode is smaller, thereby making the output bus occupy a smaller space, and improving the space utilization of the battery device to a certain extent. In addition, by adopting the scheme provided by this embodiment, the high-voltage box and the battery module in the battery device can be integrated into the same box to form a whole, which is convenient for the overall movement and assembly of the battery device. The battery module is abutted against the expansion beam, and the expansion of the battery cell is not easy to cause adverse effects on the position of the battery cell with the total positive output electrode and the total negative output electrode, so that the connection stability between the output bus and the high-voltage box and the battery cell is not easily affected by the expansion of the battery cell, so that the performance of the battery device is stable.

[0006] In some embodiments, the total positive output pole and the total negative output pole are arranged adjacent to each other. By adopting the solution provided in this embodiment, compared with the total positive output pole and the total negative output pole being arranged at intervals, the distance between the total positive output pole and the total negative output pole can be further reduced, thereby further reducing the length of the output bus between the high-voltage box and the total positive output pole and / or the total negative output pole, so that the output bus is further reduced, and the space utilization rate of the battery device is improved to a certain extent.

[0007] In some embodiments, all battery cells in each battery module are connected in series, and two battery modules are connected in series. All battery cells are connected in series, which can make the battery device have a larger power, and can meet the use requirements of a large power use environment.

[0008] In some embodiments, at least one battery module has one column and multiple rows; in a battery module with one column and multiple rows, all battery cells are sequentially connected in series via a first bus bar arranged along a first direction. By adopting the solution provided in this embodiment, in a battery module with one column, the length of the first bus bar between two adjacent battery cells can be shorter, and all battery cells can be arranged regularly.

[0009] In some embodiments, at least one battery module has one row and multiple columns; in a battery module with one row and multiple columns, all battery cells are sequentially connected in series via a first bus bar arranged along the second direction. By adopting the solution provided in this embodiment, in a battery module with one row, the length of the first bus bar between two adjacent battery cells can be shorter, and all battery cells can be arranged regularly.

[0010] In some embodiments, at least one battery module has multiple rows and columns; in a battery module with multiple rows and columns, battery cells in the same column are sequentially connected in series through a first bus disposed along a first direction to form a series module, and all series modules are sequentially connected in series through a first bus disposed along a second direction. With the solution provided in this embodiment, the length of the first bus between two adjacent battery cells is shorter, and all battery cells are arranged regularly.

[0011] In some embodiments, all battery cells are arranged in a two-dimensional matrix, and two battery modules are arranged side by side or in parallel. The battery device adopts the solution provided by this embodiment, and the arrangement of battery cells is regular, which is convenient for design and assembly.

[0012] In some embodiments, the number of columns of the two battery modules is the same or different; and / or the number of rows of the two battery modules is the same or different. When the number and arrangement of the battery cells of the two battery modules are the same, it is convenient to design the two battery modules in the battery device. When the number and arrangement of the battery cells of the two battery modules are different, the battery device can flexibly set each battery module according to the use needs, and can adapt to different installation and use environments.

[0013] In some embodiments, the number of columns of the two battery modules is even and the same, and the series poles of the two are arranged adjacent to each other and connected by a second bus. The series pole is an electrode connecting a battery module to another battery module. With the solution provided in this embodiment, the distance between the two series poles is small, so that the length of the second bus is small, the space occupied is small, and the structure of the overall battery device is compact.

[0014] In some embodiments, the number of columns of the two battery modules is an odd number and the same, and the series poles of the two are arranged at both ends of the same column or the same row and connected through a second bus bar, and the series pole is an electrode connecting a battery module to another battery module. With the solution provided in this embodiment, the distance between the two series poles is large, so that the length of the second bus bar is large, which can be achieved by a long copper bar or a long aluminum bar, which can meet the use needs of some use environments.

[0015] In some embodiments, the second busbar is placed on the side wall of the box. The second busbar is placed on the side wall of the box so that the second busbar does not occupy the space in the box for placing devices, or occupies as little space as possible in the box for placing devices, thereby making the overall battery device compact.

[0016] In some embodiments, the battery device further includes a connection terminal, a portion of which is located outside the box, and another portion of which passes through the side wall of the box and is directly connected to the high-voltage box. In the related art, the connection terminal is connected to the high-voltage box through an adapter sheet, and in this embodiment, the connection terminal is directly connected to the high-voltage box. Compared with the related art, the adapter sheet between the connection terminal and the high-voltage box can be omitted, so that the battery device has a compact structure, a small volume, and is easy to assemble.

[0017] In some embodiments, the width and thickness of the first busbar and the second busbar are consistent. By adopting the solution provided in this embodiment, the flow area of ​​the first busbar and the second busbar can be the same. The flow area refers to the cross-sectional area of ​​the first busbar, the second busbar or the output busbar through which the current passes during the propagation process. In this way, the resistance loss of the current can be small when it flows through different busbars, thereby reducing energy loss and helping to extend the service life of the battery device.

[0018] In some embodiments, the width of at least the portion of the output busbar connected to the electrode of the high-voltage box is smaller than the width of the first busbar and / or the second busbar, and the thickness of at least the portion of the output busbar connected to the electrode of the high-voltage box is greater than the thickness of the first busbar and / or the second busbar. Since the width of the electrode of the high-voltage box is generally smaller than the width of the first busbar or the second busbar, the solution provided in this embodiment can be used to make the width of at least the portion of the output busbar in contact with the electrode of the high-voltage box adaptable to the width of the electrode of the high-voltage box, and the flow area of ​​at least the portion of the output busbar in contact with the electrode of the high-voltage box is not much different from the flow area of ​​the first busbar or the second busbar, so that the resistance loss of the current is small when the current flows through different busbars, thereby reducing energy loss and helping to extend the service life of the battery device.

[0019] In some embodiments, the flow area at any position of the first bus, the flow area at any position of the second bus, and the flow area at any position of the output bus are the same. By adopting the solution provided in this embodiment, the resistance loss of the current can be reduced when the current flows through different busbars, thereby reducing energy loss and helping to extend the service life of the battery device.

[0020] In some embodiments, the width of the output busbar is adapted to the width of the electrode on the high-voltage box. With the solution provided in this embodiment, the contact area between the output busbar and the electrode on the high-voltage box is large, which can ensure the stable transmission of current at the connection between the output busbar and the high-voltage box, and also make the size of the output busbar not too large to occupy extra space.

[0021] In some embodiments, the output busbar is a structure of uniform thickness. The solution provided in this embodiment facilitates the flow area of ​​the output busbar to remain consistent at any position.

[0022] In some embodiments, the distance between the total positive output pole and the total negative output pole is adapted to the distance between the two electrodes on the high voltage box. With the solution provided in this embodiment, the total positive output pole and the total negative output pole can correspond to the two electrodes one by one, so that the output busbar can adopt a straight plate structure, which is simple in structure and easy to assemble.

[0023] In some embodiments, the distance between the total positive output pole and the total negative output pole is smaller than the distance between the two electrodes on the high-voltage box, and the output bus is a bent structure. By adopting the solution provided in this embodiment, the distance between the electrodes on the high-voltage box is not limited by the distance between the total positive output pole and the total negative output pole, so that battery modules of different specifications can be combined with different types of high-voltage boxes, so that the battery device has a wider range of applications.

[0024] In some embodiments, the output busbar is connected to the electrode of the high-voltage box through a fastener. The output busbar is connected to the electrode of the high-voltage box through a fastener, which is convenient to connect and can make the connection between the output busbar and the electrode on the high-voltage box stable.

[0025] In some embodiments, the fastener includes a bolt. The fastener adopts the structure provided by this embodiment, which is convenient for material collection and disassembly.

[0026] In a second aspect, an embodiment of the present application provides an electrical device, including a battery device provided by any of the above solutions, and the battery device is used to provide electrical energy.

[0027] The effect of the second aspect is the same as that of the first aspect and will not be described in detail here.

[0028] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings: Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application; Figure 2 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application; Figure 3A schematic diagram of the exploded structure of a battery cell in a battery device provided in some embodiments of the present application; Figure 4 A schematic diagram of the structure of a battery device provided in some embodiments of the present application; Figure 5 A schematic diagram of the structure of a battery device provided in some other embodiments of the present application; Figure 6 A schematic diagram of the structure of a battery device provided in some other embodiments of the present application; Figure 7 A schematic diagram of the structure of a battery device provided in some other embodiments of the present application; Figure 8 A schematic diagram of the structure of a battery device provided in some other embodiments of the present application; Fig. 9 Schematic diagram of the structure of the battery device provided in some other embodiments of the present application.

[0030] The reference numerals in the specific implementation manner are as follows: 1000. Vehicles; 100, battery device; 200, controller; 300, motor; 10. Box body; 11. Cover body; 12. Tray; 13. Expansion beam; 20. Battery cell; 21. End cover; 21a. Electrode terminal; 22. Shell; 23. Electrode assembly; 231. Main body; 232. Tab; 30. High-voltage box; 40. First bus; 50. Second bus; 60. Total positive output pole; 70. Output bus; 80. Total negative output pole; 90. Connecting terminal. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein 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 figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0034] Reference to "embodiments" herein 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 herein may be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0036] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0037] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0040] In the current high-voltage connection technology, the battery device generally includes multiple battery cells, and the multiple battery cells are arranged in a matrix of m rows and n columns, where m and n are both integers greater than or equal to 2; all battery cells are connected in series in sequence, and the connection circuit is arranged in an S shape. The total positive output electrode and the total negative output electrode connected to the high-voltage box in the battery module composed of multiple battery cells are located at the two ends of the same row or column of the battery module. This causes the total positive output electrode and the total negative output electrode to be far apart. The total positive output electrode and the total negative output electrode need to be connected to the high-voltage box in the battery device through the conversion of long copper bars or long aluminum bars. The presence of long copper bars or long aluminum bars will occupy the internal space of the battery device and reduce the space utilization rate of the battery device.

[0041] In order to improve the above problems, an embodiment of the present application provides a battery device. The battery device changes the connection mode of the battery cells in the battery device, so that the total positive output electrode and the total negative output electrode of the battery module formed by all the battery cells are located on two adjacent battery cells 20, and are no longer located at the two ends of the same row, so that the spacing between the total positive output electrode and the total negative output electrode is smaller, so that the high-voltage box can be placed adjacent to the total positive output electrode and the total negative output electrode, so that the length of the output bus between the high-voltage box and the total positive output electrode is smaller, and then the output bus occupies a smaller space, thereby improving the space utilization of the battery device to a certain extent.

[0042] The battery device disclosed in the embodiments of the present application can be used in electrical devices that use the battery device as a power source or various energy storage devices, energy storage systems, and charging networks that use batteries as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0043] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0044] Please refer to Figure 1 , Figure 1A 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 device (Battery Apparatus) is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, for the working power requirements of the vehicle 1000 during startup, navigation and driving.

[0045] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0046] Please refer to Figure 2 , Figure 2 The schematic diagram of the exploded structure of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a battery cell 20 , wherein the battery cell 20 is accommodated in the box body 10 .

[0047] The box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a cover 11 and a tray 12. The cover 11 is covered on the tray, and together with the tray 12, defines a storage space for accommodating the battery cell 20. The tray 12 can be a hollow structure with one end open, and the cover 11 can be a plate-like structure. The cover 11 covers the open side of the tray 12, so that the cover 11 and the tray 12 together define a storage space; the cover 11 and the tray 12 can also be hollow structures with side openings, and the open side of the cover 11 covers the open side of the tray 12. Of course, the box 10 formed by the cover 11 and the tray 12 can be in a variety of shapes, such as a round through-portion, a cuboid, etc. The above-mentioned tray 12 is an important structural bearing member in the battery system, which is used to store and protect the battery cells, and has an important impact on the collision safety of the whole vehicle and the torsion and bending stiffness of the whole vehicle body.

[0048] There may be multiple battery cells 20, and the multiple battery cells 20 are connected in series, in parallel or in mixed connection through a busbar. Mixed connection means that multiple battery cells 20 are both connected in series and in parallel. Multiple battery cells 20 can be directly connected in series, in parallel or in mixed connection, and then the whole formed by multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 can also be a battery module in which multiple battery cells 20 are first connected in series, in parallel or in mixed connection, and multiple battery modules are then connected in series, in parallel or in mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures. For example, the battery device 100 may also include a busbar for realizing electrical connection between multiple battery cells 20. As an example, multiple battery cells 20 may form a battery module (Battery Module), and the battery module is formed by arranging and fixing multiple battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling multiple battery cells 20 with a cable tie.

[0049] Each battery cell 20 may be a secondary battery or a primary battery. A secondary battery refers to a battery cell that can be used continuously by activating the active material by charging after the battery cell 20 is discharged. The battery cell 20 may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited in the present embodiment of the application. The battery cell may be in the form of a round through-portion, a flat body, a rectangular parallelepiped, or other shapes.

[0050] Please refer to Figure 3 , Figure 3 The following is a schematic diagram of the exploded structure of a battery cell 20 in a battery device provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery. Figure 3 The battery cell 20 includes an end cover 21, a shell 22, an electrode assembly 23 and other functional components.

[0051] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminal 21a can be used to electrically connect with the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20, and the electrode terminal 21a includes a positive electrode and a negative electrode. In some embodiments, the end cap 21 can 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. The material of the end cap 21 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 any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0052] The shell 22 is a component used to cooperate with the end cap 21 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 22 and the end cap 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cap 21 at the opening. Without limitation, the end cap 21 and the shell 22 can also be integrated. Specifically, the end cap 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cap 21 covers the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a round through-portion shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0053] 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 22. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 232. The positive tab and the negative tab 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 tab 232 connects the electrode terminals to form a current loop.

[0054] Please refer to Figure 4 and Figure 6 , Figure 4 A schematic diagram of the structure of a battery device provided in some embodiments of the present application, Figure 4 The battery cells in the space enclosed by the dotted line frame L1 form a battery module, and the battery cells in the space enclosed by the dotted line frame L2 form a battery module. Figure 6 Schematic diagram of the structure of the battery device provided in other embodiments of the present application. The embodiment of the present application provides a battery device. The battery device includes a high-voltage box 30 and two battery modules distributed along a first direction X. Each battery module includes a plurality of battery cells 20 arranged in an array, and the positive electrode and the negative electrode of any battery cell 20 are spaced apart along the first direction X.

[0055] It should be noted that the number of battery cells 20 in the two battery modules can be the same or different, depending on the use requirements of the battery device. When the number of battery cells 20 in the two battery modules is the same, the shape of the array formed by the two can be the same or different. For example, when the number of battery cells 20 in the two battery modules is 8, the two battery modules can form a 2*4 array, such as Figure 4 As shown; one of the two battery modules can form a 1*8 array and the other can form a 2*4 array, which can be determined according to the shape of the installation space of the battery device. When the number of battery cells 20 in the two battery modules is different, the arrays formed by the two are generally different, such as Figure 5 As shown; if the number of battery cells 20 in one battery module is 4 and the number of battery cells 20 in another battery module is 8, the former battery module can form a 1*4 array and the latter battery module can form a 2*4 array.

[0056] In any battery module, each column of battery cells 20 is arranged along a first direction X, and each row of battery cells 20 is arranged along a second direction Y, and the second direction Y is arranged to intersect the first direction X. In any battery module, the positive and negative poles of all battery cells 20 in the same column are distributed in the same manner, and the positive and negative poles of battery cells 20 in adjacent columns are distributed in opposite manners.

[0057] All battery cells 20 of the two battery modules are electrically connected to form a total positive output electrode 60 and a total negative output electrode 80. The total positive output electrode 60 and the total negative output electrode 80 are respectively arranged on the two battery modules and on two battery cells 20 adjacent to each other along the first direction X.

[0058] The high voltage box 30 and the battery cells 20 are spaced apart in the second direction Y, and the positive and negative electrodes of the high voltage box 30 are spaced apart in the first direction X. The total positive output electrode 60 and the total negative output electrode 80 are respectively connected to the high voltage box 30 through the output bus 70; the output bus 70 is a rigid member.

[0059] The battery device also includes a box body 10, and the high-voltage box 30 and the battery module are both arranged in the box body 10. The box body 10 is provided with at least one expansion beam 13. The expansion beam 13 is arranged along the first direction X, and the two ends of the expansion beam 13 in the first direction X are connected to the side walls of the box body 10. One of the expansion beams 13 is located between the high-voltage box 30 and the battery module. The battery module abuts against the expansion beam 13. In this embodiment, the shape of the box body 10 can be rectangular, L-shaped or other shapes, which can be determined according to the specific needs of use. One or more expansion beams 13 can be arranged in the box body 10. The expansion beam 13 is a structural member that can withstand and limit the expansion force, and is used to suppress the expansion of the battery module. Since the expansion of the battery cell 20 usually occurs along its thickness direction, this is because the design of the battery cell 20 is usually to stack the electrode materials together, and the space between the layers is limited. When gas is generated inside, the direction that is most likely to expand is the thickness direction of the battery cell 20.

[0060] When there is one expansion beam 13 in the box body 10, the expansion beam 13 is arranged between the high-voltage box 30 and the battery module, and abuts against the battery module. When there are two expansion beams 13, one expansion beam 13 is arranged between the high-voltage box 30 and the battery module, and abuts against the battery module; the other expansion beam 13 is generally located on the other side of the battery module.

[0061] The high voltage box 30, sometimes also called the high voltage distribution unit (HVDU) or high voltage control unit, is a key part that connects the high voltage battery and other high voltage electrical components such as motors, inverters, chargers, etc. Its main functions include but are not limited to: 1. Circuit protection, the high voltage box 30 contains safety devices such as fuses and circuit breakers to prevent damage caused by overcurrent or short circuit; 2. Current distribution, it is responsible for distributing power from the battery to different systems and components; 3. Monitoring function, some high voltage boxes 30 also have the function of monitoring voltage and current, and can report status information to the vehicle's control system; 4. Ground connection, ensure the correct grounding of the high voltage system, which is very important for personal safety; 5. Relay control, open or cut off the high voltage circuit by controlling the relay.

[0062] In the battery device, all battery cells 20 can form a regular two-dimensional matrix, or can be arranged in an L-shaped array, that is, the number of columns or rows of the two battery modules is different; or, all battery cells 20 can be arranged in an array in part and not in another part.

[0063] When the battery device is arranged in a two-dimensional matrix as a whole, a portion of the battery cells 20 arranged in a one-dimensional array or a two-dimensional array can form one battery module, and the remaining battery cells 20 arranged in a one-dimensional array or a two-dimensional array can form another battery module.

[0064] When only a part of the battery device (hereinafter referred to as the first part) is arranged in a two-dimensional array, and the other part (hereinafter referred to as the second part) is located outside the above-mentioned first part, it can be arranged in an array or not. At this time, in the part of the battery device arranged in a two-dimensional array (i.e., the first part), a part of the battery cells 20 arranged in a one-dimensional array or a two-dimensional array can form one of the battery modules, and the remaining battery cells 20 arranged in a one-dimensional array or a two-dimensional array can form another battery module; or, a part of the battery cells 20 in the first part and the second part form a battery module, and the remaining part of the first part forms another battery module; or, a part of the battery cells 20 in the first part and a part of the second part form a battery module, and the remaining part of the first part and the remaining part of the second part form another battery module.

[0065] In this embodiment, the number of rows and the number of columns of the two battery modules may be the same or different, depending on the specific use requirements.

[0066] In this embodiment, each battery module can arrange multiple battery cells 20 in a single row in the length direction of the battery cell 20, that is, the first direction X; and arrange multiple battery cells 20 in a single row in the width direction of the battery cell 20, that is, the second direction Y. In other embodiments, other directions that form an acute angle with the length direction of the battery cell 20 can be used as the first direction X; and other directions that form an acute angle with the width direction of the battery cell 20 can be used as the second direction Y according to the use requirements. The specific direction can be determined according to the use requirements.

[0067] In any battery module, the positive and negative poles of all battery cells 20 in the same column are distributed in the same manner, and the positive and negative poles of battery cells 20 in adjacent columns are distributed in opposite manners. Figure 4 The perspective shown is used for explanation. In each battery module, from left to right, the battery cells in the first column are all with the negative electrode on the top and the positive electrode on the bottom; the battery cells in the second column are all with the positive electrode on the top and the negative electrode on the bottom; the battery cells in the third column are all with the negative electrode on the top and the positive electrode on the bottom; the battery cells in the fourth column are all with the positive electrode on the top and the negative electrode on the bottom. It can be understood that in other embodiments, in any battery module, the positive and negative electrode distributions of all battery cells 20 in the same column are the same, and the positive and negative electrode distributions of battery cells 20 in adjacent columns are opposite. It can also be expressed as follows: in each battery module, from left to right, the battery cells in the first column are all with the positive electrode on the top and the negative electrode on the bottom; the battery cells in the second column are all with the negative electrode on the top and the positive electrode on the bottom; the battery cells in the third column are all with the positive electrode on the top and the negative electrode on the bottom; the battery cells in the fourth column are all with the negative electrode on the top and the positive electrode on the bottom.

[0068] The battery cells of the two battery modules can be electrically connected in series or in mixed connection, which can be determined according to the use requirements. Each battery module ultimately forms only one output pole, and the output poles of the two battery modules have opposite polarities, one of which is a positive pole, recorded as the total positive output pole 60, and the other is a negative pole, recorded as the total positive output pole 60.

[0069] The output busbar 70 is a copper bar or an aluminum bar that connects the battery module and the high-voltage box 30, and can also be other electrical connectors that can achieve series connection between the battery module and the high-voltage box 30. The output busbar 70 is a rigid member, which means that the copper bar, aluminum bar, etc. are hard bars.

[0070] The total positive output electrode 60 and the total negative output electrode 80 are arranged on two battery cells 20 adjacent to each other along the first direction X, which means that the battery cell with the total positive output electrode 60 and the battery cell with the total negative output electrode 80 are located in the same column, and there are no other battery cells between them.

[0071] The assembly principle of the battery device provided in the embodiment of the present application is as follows: During assembly, first determine the position of the total positive output pole 60 and the total negative output pole 80 and the range of the two battery modules according to the position of the high-voltage box 30 or the electrical connection requirements, then connect all battery cells 20 in series, in parallel or in a mixed manner in each battery module with the total positive output pole 60 or the total negative output pole 80 as the starting point, and connect the two battery modules in series, and finally connect the total positive output pole 60 and the high-voltage box 30, as well as the total negative output pole 80 and the high-voltage box 30 through the output bus 70.

[0072] The abutment of the battery modules can ensure that the position of the battery cell 20 provided with the total positive output pole 60 and the total negative output pole 80 is not affected by the expansion force of each battery cell 20 in the battery module, so that when the battery cell 20 expands, the position between the battery cell 20 provided with the total positive output pole 60 and the total negative output pole 80 and the high-voltage box 30 does not change, or does not change significantly, thereby not causing adverse effects on the connection between the output bus 70 and the high-voltage box 30 and the battery cell 20.

[0073] The battery device provided in the embodiment of the present application changes the connection mode of the battery cells 20 in the battery device, so that the total positive output electrode 60 and the total negative output electrode 80 of the battery module formed by all the battery cells 20 are located on two adjacent battery cells 20, and are no longer located at the two ends of the same row, so that the spacing between the total positive output electrode 60 and the total negative output electrode 80 is smaller, so that the high-voltage box 30 can be placed adjacent to the total positive output electrode 60 and the total negative output electrode 80, so that the length of the output bus 70 between the high-voltage box 30 and the total positive output electrode 60 and / or the total negative output electrode 80 is smaller, thereby making the output bus 70 occupy a smaller space, thereby improving the space utilization of the battery device to a certain extent. In addition, by adopting the solution provided in this embodiment, the high-voltage box 30 and the battery module in the battery device can be integrated into the same box 10 to form a whole, which is convenient for the overall movement and assembly of the battery device. The battery module is in contact with the expansion beam 13, and the expansion of the battery cell 20 is not likely to cause adverse effects on the position of the battery cell 20 provided with the total positive output pole 60 and the total negative output pole 80, so that the connection stability between the output bus 70 and the high-voltage box 30 and the battery cell 20 is not easily affected by the expansion of the battery cell 20, so that the performance of the battery device is stable.

[0074] In some embodiments, the total positive output pole 60 and the total negative output pole 80 are disposed adjacent to each other.

[0075] By adopting the solution provided in this embodiment, compared with the spaced arrangement of the total positive output pole 60 and the total negative output pole 80, the distance between the total positive output pole 60 and the total negative output pole 80 can be further reduced, thereby further reducing the length of the output bus 70 between the high-voltage box 30 and the total positive output pole 60 and / or the total negative output pole 80, so that the output bus 70 is further reduced, thereby improving the space utilization of the battery device to a certain extent.

[0076] In some embodiments, all battery cells 20 in each battery module are connected in series, and two battery modules are connected in series.

[0077] All the battery cells 20 are connected in series, so that the battery device can have a larger power supply and can meet the use requirements of a large power use environment.

[0078] In some embodiments, at least one battery module has one column and multiple rows. In a battery module having one column and multiple rows, all battery cells 20 are sequentially connected in series via a first bus bar 40 arranged along a first direction.

[0079] The first busbar 40 is a copper bar or an aluminum bar for connecting the battery cells 20 in series, and may also be other electrical connectors that can connect the battery cells 20 in series.

[0080] The first busbar 40 arranged along the first direction means that the length direction of the first busbar 40 is arranged along the first direction.

[0081] By adopting the solution provided in this embodiment, in a battery module with one column, the length of the first bus bar 40 between two adjacent battery cells 20 can be shorter, and all battery cells 20 can be arranged regularly.

[0082] In some embodiments, at least one battery module has one row and multiple columns. In a battery module with one row and multiple columns, all battery cells 20 are sequentially connected in series through a first bus bar 40 arranged along the second direction.

[0083] The first busbar 40 arranged along the second direction means that the length direction of the first busbar 40 is arranged along the second direction.

[0084] By adopting the solution provided in this embodiment, in a battery module with one row, the length of the first bus bar 40 between two adjacent battery cells 20 can be shorter, and all battery cells 20 can be arranged regularly.

[0085] In some embodiments, at least one battery module has multiple rows and columns. In a battery module with multiple rows and columns, the battery cells 20 located in the same column are sequentially connected in series through the first busbar 40 arranged along the first direction to form a series module, and all the series modules are sequentially connected in series through the first busbar 40 arranged along the second direction.

[0086] Since the positive and negative poles of the battery cells 20 in the same row in each battery module in the battery device provided by the embodiment of the present application are distributed in the same manner, the positive and negative poles of the battery cells 20 in the same column are distributed in the same manner, and the battery cells 20 in the same column are sequentially connected in series through the first bus 40 to form a series module, all the series modules are sequentially connected in series through the first bus 40. The circuits formed by the series connection of the battery cells 20 in the two battery modules are all arranged in an S shape, and the two S-shaped circuits formed by the two battery modules are arranged oppositely, that is, two S-shaped series structures are presented in the battery device.

[0087] With the solution provided in this embodiment, the length of the first busbar 40 between two adjacent battery cells 20 is relatively short, and all battery cells 20 are arranged regularly.

[0088] In some embodiments, all battery cells 20 are arranged in a two-dimensional matrix. Two battery modules are arranged side by side or in parallel.

[0089] A two-dimensional matrix means that all battery cells 20 are arranged in an m*n rectangular array, where m and n are both greater than or equal to 2.

[0090] The two battery modules can be arranged in sequence along the extension direction of a single row, or in sequence along the extension direction of a single column. The two battery modules are arranged side by side or in parallel, which means that when the two battery modules are arranged in sequence along the extension direction of a single row, the rows in the two battery modules are arranged in one-to-one correspondence, that is, the first rows of the two battery modules are aligned in the same row, and the ath rows are aligned in the same row, and a is greater than 1 and less than or equal to m; when the two battery modules are arranged in sequence along the extension direction of a single column, the columns in the two battery modules are arranged in one-to-one correspondence, that is, the first columns of the two battery modules are aligned in the same column, and the bth columns are aligned in the same column, and b is greater than 1 and less than or equal to n.

[0091] The battery device adopts the solution provided in this embodiment, and the battery cells 20 are arranged in a regular manner, which is convenient for design and assembly.

[0092] like Figure 4 As shown, in some embodiments, the number of columns of the two battery modules is even and the same, and the series poles of the two are adjacently arranged and connected via a second busbar 50. The series poles are electrodes connecting a battery module to another battery module.

[0093] The second busbar 50 is a copper bar or an aluminum bar for connecting the battery cells 20 in series, and may also be other electrical connectors that can connect the battery cells 20 in series.

[0094] By adopting the solution provided in this embodiment, the distance between the two series poles is small, so that the length of the second bus bar 50 is small, the space occupied is small, and the structure of the entire battery device is compact.

[0095] Figure 7 A schematic diagram of the structure of a battery device provided in some other embodiments of the present application, Figure 8 This is a schematic diagram of the structure of a battery device provided in some other embodiments of the present application. Figures 6 to 8 As shown, in other embodiments, the number of columns of the two battery modules is an odd number and the same, and the series poles of the two are arranged at both ends of the same column or the same row and connected by the second bus 50. The series pole is an electrode connecting a battery module to another battery module. With the solution provided in this embodiment, the distance between the two series poles is large, so that the length of the second bus 50 is large, which can be achieved by a long copper bar or a long aluminum bar, which can meet the use needs of some use environments.

[0096] In some embodiments, the second bus bar 50 is placed on the side wall of the box body 10 .

[0097] The box body 10 is generally composed of a bottom plate and a frame. The frame is surrounded by a plurality of side beams connected end to end. An expansion beam can also be arranged in the cavity surrounded by the frame, and the two ends of the expansion beam are connected to the side beams constituting the frame. The side beams and expansion beams are respectively surrounded by a plurality of side walls connected end to end. The side wall of the box body 10 on which the second bus 50 is placed refers to the side wall of the expansion beam or the side beam that is in contact with the battery cell 20 and is arranged adjacent to the second bus 50.

[0098] By adopting the solution provided in this embodiment, the second bus 50 is placed on the side wall of the box 10, so that the second bus 50 does not occupy the space in the box 10 for placing devices, or occupies as little space as possible in the box 10 for placing devices, thereby making the structure of the overall battery device compact.

[0099] like Fig. 9 As shown, in some embodiments, the battery device further includes a connection terminal 90 , a portion of which is located outside the box body 10 , and another portion of which passes through the side wall of the box body 10 and is directly connected to the high-voltage box 30 .

[0100] The connection terminal 90 is an electrode terminal of the battery device for connecting to an external electrical device. There are two connection terminals 90, one of which is a positive electrode and the other is a negative electrode. The two connection terminals 90 are connected to the positive output electrode and the negative output electrode of the high-voltage box 30 respectively.

[0101] In the related art, the connecting terminal 90 is connected to the high-voltage box 30 via an adapter. In this embodiment, the connecting terminal 90 is directly connected to the high-voltage box 30. Compared with the related art, the adapter between the connecting terminal 90 and the high-voltage box 30 can be omitted, so that the battery device has a compact structure, a small volume, and is easy to assemble.

[0102] In some embodiments, the width and thickness of the first busbar 40 and the second busbar 50 are consistent.

[0103] The first busbar 40 and the second busbar 50 are generally sheets with a certain thickness, having a length direction, a width direction and a thickness direction. The width in this embodiment refers to the size of the first busbar 40 and the second busbar 50 in the width direction, and the thickness refers to the size of the first busbar 40 and the second busbar 50 in the thickness direction.

[0104] By adopting the solution provided in this embodiment, the flow area of ​​the first busbar 40 and the second busbar 50 can be the same. The flow area refers to the cross-sectional area of ​​the first busbar 40, the second busbar 50 or the output busbar 70 through which the current passes during the propagation process. In this way, the resistance loss of the current can be small when it flows through different busbars, thereby reducing energy loss and helping to extend the service life of the battery device.

[0105] like Figure 8 As shown, in some embodiments, the width d1 of at least the portion of the output bus 70 connected to the electrode of the high-voltage box 30 is smaller than the width d3 of the first bus 40 and / or the second bus 50, and the thickness of at least the portion of the output bus 70 connected to the electrode of the high-voltage box 30 is greater than the thickness of the first bus 40 and / or the second bus 50.

[0106] The portion connected to the electrode of the high-voltage box 30 refers to the portion of the output bus bar 70 that contacts the electrode of the high-voltage box 30 .

[0107] The width of at least the portion of the output bus 70 connected to the electrode of the high-voltage box 30 is smaller than the width of the first bus 40 and / or the second bus 50, including the following situations: first, the width of only the portion of the output bus 70 connected to the electrode of the high-voltage box 30 is smaller than the width of the first bus 40 and / or the second bus 50, and the width of other portions of the output bus 70 is the same as the first bus 40 or the second bus 50; second, the width of any portion of the output bus 70 is smaller than the width of the first bus 40 and / or the second bus 50.

[0108] The thickness of at least the portion of the output bus 70 connected to the electrode of the high-voltage box 30 is greater than the thickness of the first bus 40 and / or the second bus 50, including the following situations: first, the thickness of only the portion of the output bus 70 connected to the electrode of the high-voltage box 30 is greater than the thickness of the first bus 40 and / or the second bus 50, and the thickness of other portions of the output bus 70 is the same as that of the first bus 40 or the second bus 50; second, the thickness of any portion of the output bus 70 is greater than the thickness of the first bus 40 and / or the second bus 50.

[0109] In this embodiment, the thickness of at least the portion of the output bus 70 connected to the electrode of the high-voltage box 30 can be determined based on the width of the portion and the flow area of ​​the first bus 40 or the second bus 50, so that the flow area of ​​at least the portion of the output bus 70 connected to the electrode of the high-voltage box 30 is equivalent to the flow area of ​​the first bus 40 or the second bus 50.

[0110] Since the width of the electrode of the high-voltage box 30 is generally smaller than the width of the first bus 40 or the second bus 50, the solution provided in this embodiment can be adopted to make the width of at least the portion of the output bus 70 that contacts the electrode of the high-voltage box 30 compatible with the width of the electrode of the high-voltage box 30, and can also make the flow area of ​​at least the portion of the output bus 70 that contacts the electrode of the high-voltage box 30 not much different from the flow area of ​​the first bus 40 or the second bus 50, so that the resistance loss of the current is small when flowing through different bus bars, thereby reducing energy loss and helping to extend the service life of the battery device.

[0111] In some embodiments, the flow area at any position of the first busbar 40 , the flow area at any position of the second busbar 50 , and the flow area at any position of the output busbar 70 are all the same.

[0112] By adopting the solution provided in this embodiment, the resistance loss of the current can be reduced when the current flows through different bus bars, thereby reducing energy loss and helping to extend the service life of the battery device.

[0113] like Figure 4 As shown, in some embodiments, the number of columns of the two battery modules is the same or different; and / or, the number of rows of the two battery modules is the same or different.

[0114] The solution provided in this embodiment includes at least the following situations: the first is that the two battery modules have the same number of columns and the same number of rows; the second is that the two battery modules have the same number of columns and the two battery modules have different numbers of rows; the third is that the two battery modules have different numbers of columns and the two battery modules have the same number of rows; the fourth is that the two battery modules have different numbers of columns and the two battery modules have different numbers of rows.

[0115] When the number and arrangement of the battery cells 20 of the two battery modules are the same, it is convenient to design the two battery modules in the battery device.

[0116] When the number and arrangement of the battery cells 20 of the two battery modules are different, the battery device can flexibly set the number and arrangement of the battery cells in each battery module according to usage requirements, and can adapt to different installation and usage environments.

[0117] like Figure 8 As shown, in some embodiments, the width d1 of the output busbar 70 is adapted to the width d2 of the electrode on the high voltage box 30 .

[0118] The width of the output bus bar 70 and the width of the electrode on the high voltage box 30 refer to the dimensions of the two in the same direction, such as the dimensions in the width direction of the output bus bar 70 .

[0119] The width of the output busbar 70 is adapted to the width of the electrode on the high-voltage box 30, which means that the widths of the two are the same or equivalent. Equivalent means that the difference between the two is within a preset range, such as within 20% of either width, and is set according to installation needs.

[0120] By adopting the solution provided in this embodiment, the contact area between the output bus 70 and the electrodes on the high-voltage box 30 is larger, which can not only ensure the stable transmission of current at the connection between the output bus 70 and the high-voltage box 30, but also ensure that the size of the output bus 70 will not be too large to occupy excess space.

[0121] In some embodiments, the output busbar 70 is a uniform thickness structure.

[0122] The output busbar 70 is of equal thickness structure, which means that the thickness of the output busbar 70 at any position is the same or approximately the same. Approximately the same means that the difference in thickness between any two positions is less than or equal to 5% of the thickness at any position.

[0123] The solution provided in this embodiment is adopted to facilitate the flow area of ​​the output bus 70 to remain consistent at any position.

[0124] In some embodiments, the distance d4 between the total positive output pole 60 and the total negative output pole 80 is adapted to the distance d5 between the two electrodes on the high voltage box 30 .

[0125] The distance d4 between the total positive output electrode 60 and the total negative output electrode 80 refers to the minimum distance between two opposing surfaces of the total positive output electrode 60 and the total negative output electrode 80 .

[0126] The distance d5 between the two electrodes on the high-voltage box 30 refers to the minimum distance between two surfaces on which the two electrodes on the high-voltage box 30 are disposed.

[0127] Adaptation means that the spacing d4 between the total positive output electrode 60 and the total negative output electrode 80 is the same as the spacing d5 between the two electrodes on the high-voltage box 30, or the difference range is within a preset range. The preset range can be within 5% or 10% of any of the above two spacings, which can be determined according to installation needs.

[0128] By adopting the solution provided in this embodiment, the total positive output pole 60 and the total negative output pole 80 can correspond to the two electrodes one by one, so that the output bus 70 can adopt a straight plate structure, which is simple in structure and easy to assemble.

[0129] Fig. 9 This is a schematic diagram of the structure of a battery device provided in some other embodiments of the present application. Fig. 9 As shown, in some embodiments, the distance between the total positive output pole 60 and the total negative output pole 80 is smaller than the distance between the two electrodes on the high voltage box 30. The output bus bar 70 is a bent structure.

[0130] In this embodiment, the positions of the total positive output pole 60 and the total negative output pole 80 no longer correspond to the two electrodes, but are staggered. The output bus 70 adopts a bending structure, which can be connected to the total positive output pole 60 at one end and to the electrode of the high-voltage box 30 at the other end, which meets the use requirements.

[0131] By adopting the solution provided in this embodiment, the spacing between the electrodes on the high-voltage box 30 is not limited by the spacing between the total positive output pole 60 and the total negative output pole 80, so that battery modules of different specifications can be combined with different types of high-voltage boxes 30, making the battery device have a wider range of applications.

[0132] In some embodiments, the output busbar 70 is connected to the electrodes of the high voltage box 30 via fasteners.

[0133] The fastener refers to a type of mechanical component used to connect the output busbar 70 and the electrode of the high-voltage box 30, and may include a bolt, a pin, a snap, and the like.

[0134] The output bus bar 70 is connected to the electrodes of the high voltage box 30 by fasteners, which is convenient to connect and can make the connection between the output bus bar 70 and the electrodes on the high voltage box 30 stable.

[0135] In some embodiments, the fastener comprises a bolt.

[0136] In this embodiment, the fastener may include only bolts, or may include bolts and other components, such as washers, nuts, etc., depending on the usage requirements.

[0137] The fastener adopts the structure provided in this embodiment, which is convenient for material collection and disassembly.

[0138] According to some embodiments of the present application, the present application further provides an electrical device, comprising a battery device provided by any of the above solutions. The battery device is used to provide electrical energy.

[0139] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0140] The electrical device provided in the embodiment of the present application, including the above-mentioned battery device, can achieve the same effect as above, which will not be described in detail here.

[0141] like Figures 4 to 9 As shown, an embodiment of the present application provides a battery device, which relates to the fields of power batteries, energy storage batteries, mechanical devices, etc. The battery device includes a box 10 and a high-voltage box 30 and a plurality of battery cells 20, all of which are arranged in the box 10. The plurality of battery cells 20 are arranged in a two-dimensional matrix. The positive and negative poles of each battery cell 20 are arranged in the same manner. Some of the battery cells 20 arranged in a one-dimensional array or a two-dimensional array form a battery module, and the remaining battery cells 20 arranged in a one-dimensional array or a two-dimensional array form another battery module. The columns in the two battery modules are arranged one to one.

[0142] The positive electrodes and negative electrodes of all the battery cells 20 in the battery device are arranged at intervals along a first direction, and the first direction is the length direction of the battery cells.

[0143] In the same battery module, the battery cells 20 in the same column are sequentially connected in series through the first busbar 40 arranged along the first direction to form a series module, and all the series modules are sequentially connected in series through the first busbar 40 arranged along the second direction. Two battery modules are connected in series through the second busbar 50. The second direction is perpendicular to the first direction.

[0144] Each battery module has a total output pole. The total output pole is connected to the high-voltage box 30 through an output bus 70. The polarity of the total output poles of the two battery modules is opposite, and the total output poles of the two battery modules are located in the same column and arranged adjacent to each other. One of the two total output poles is a positive pole, which is the total positive output pole 60, and the other is a negative pole, which is the total negative output pole 80. The output bus is an aluminum bar, and the output bus connected to the total positive output pole can be called a total positive output pole aluminum bar, and the output bus connected to the total negative output pole can be called a total negative output pole aluminum bar.

[0145] In this embodiment, each battery module takes the total output pole as the starting point, and connects the positive and negative poles of all battery cells in series in an S-shaped direction in a direction away from another battery module.

[0146] Regardless of whether the battery cells are even rows * even columns, even rows * odd columns, odd rows * even columns, or odd rows * odd columns, the double S-type high-voltage connection method can ensure that the total positive output pole aluminum bar and the total negative output pole aluminum bar are relatively close. The high-voltage box 30 is installed in front of the total positive output pole aluminum bar and the total negative output pole aluminum bar. The aluminum bar can be directly overlapped on the high-voltage box 30 and fixed by bolts to achieve direct connection between the battery module and the high-voltage box 30. In order to adapt to different models of high-voltage boxes 30, the output bus can be adjusted to any shape while meeting the current capacity, thereby achieving direct connection with different models of high-voltage boxes 30.

[0147] There are at least two disadvantages of using the connection method in the above-mentioned related technology for the battery device: 1. The existence of the above-mentioned long copper bar or long aluminum bar requires more materials for the battery device, and the manufacturing and installation costs are high; 2. The above-mentioned long copper bar or long aluminum bar occupies the internal space of the battery device, reducing the space utilization rate of the battery device.

[0148] In this embodiment, a new type of copper-aluminum high-voltage connection arrangement is used, and the double S-shaped direction of the battery module cross-connected aluminum bar is used to change the position of the total positive output electrode and the total negative output electrode in the battery device, so that the output electrode aluminum bar (i.e., the output bus bar) is directly overlapped and locked on the high-voltage box 30, so as to realize the direct connection between the battery module and the high-voltage box 30, reduce the length of the above-mentioned output electrode aluminum bar, save costs, and improve the space utilization of the battery device. Moreover, the above-mentioned total positive or total negative output electrode aluminum bar can be adapted to different models of high-voltage boxes 30 by changing the shape, so as to improve the scope of application of the direct connection solution between the battery module and the high-voltage box 30.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: It comprises a high voltage box and two battery modules distributed along a first direction, each of the battery modules comprises a plurality of battery cells arranged in an array, and the positive electrode and the negative electrode of any of the battery cells are spaced apart and distributed along the first direction; In any of the battery modules, the battery cells in each column are arranged along the first direction, and the battery cells in each row are arranged along the second direction, and the second direction is arranged to intersect with the first direction; In any of the battery modules, the positive and negative poles of all the battery cells in the same column are distributed in the same manner, and the positive and negative poles of the battery cells in adjacent columns are distributed in opposite manners; All the battery cells of the two battery modules are electrically connected to form a total positive output electrode and a total negative output electrode; the total positive output electrode and the total negative output electrode are respectively arranged on the two battery modules and on two battery cells adjacent to each other along the first direction; The high-voltage box and the battery cells are spaced apart in the second direction, and the positive and negative electrodes of the high-voltage box are spaced apart in the first direction, and the total positive output electrode and the total negative output electrode are respectively connected to the high-voltage box through output bus bars; the output bus bars are rigid parts; The battery device also includes a box body, the high-voltage box and the battery module are both arranged in the box body, at least one expansion beam is provided in the box body, the expansion beam is arranged along the first direction, and the two ends of the expansion beam in the first direction are connected to the side walls of the box body, one of the expansion beams is located between the high-voltage box and the battery module, and the battery module abuts against the expansion beam.

2. The battery device according to claim 1, characterized in that: The total positive output pole and the total negative output pole are arranged adjacent to each other.

3. The battery device according to claim 2, characterized in that: All the battery cells in each battery module are connected in series, and two battery modules are connected in series.

4. The battery device according to claim 3, characterized in that: At least one of the battery modules has one column and multiple rows; in the battery module with one column and multiple rows, all the battery cells are sequentially connected in series via a first bus bar arranged along the first direction.

5. The battery device according to claim 3, characterized in that: At least one of the battery modules has one row and multiple columns; in the battery module with one row and multiple columns, all the battery cells are sequentially connected in series via a first bus bar arranged along the second direction.

6. The battery device according to claim 3, characterized in that: At least one of the battery modules has multiple rows and columns; in the battery modules with multiple rows and columns, the battery cells located in the same column are connected in series in sequence through the first bus arranged along the first direction to form a series module, and all the series modules are connected in series in sequence through the first bus arranged along the second direction.

7. The battery device according to claim 5 or 6, characterized in that: All the battery cells are arranged in a two-dimensional matrix, and the two battery modules are arranged side by side or in parallel.

8. The battery device according to claim 7, characterized in that: The number of columns of the two battery modules is an even number and the same, and the series poles of the two are arranged adjacent to each other and connected via a second bus bar. The series poles are electrodes connecting the battery module to the other battery module.

9. The battery device according to claim 7, characterized in that: The column numbers of the two battery modules are both odd and the same, and the series poles of the two are arranged at both ends of the same column or row and connected through a second bus. The series poles are electrodes connecting the battery module to the other battery module.

10. The battery device according to claim 9, characterized in that: The second busbar is placed on the side wall of the box.

11. The battery device according to any one of claims 1 to 6, characterized in that: The battery device further comprises a connection terminal, a part of which is located outside the box body, and another part of which passes through the side wall of the box body and is directly connected to the high-voltage box.

12. The battery device according to claim 8 or 9, characterized in that: The width and thickness of the first busbar and the second busbar are consistent.

13. The battery device according to claim 8 or 9, characterized in that: The width of at least the portion of the output busbar connected to the electrode of the high-voltage box is smaller than the width of the first busbar and / or the second busbar, and the thickness of at least the portion of the output busbar connected to the electrode of the high-voltage box is greater than the thickness of the first busbar and / or the second busbar.

14. The battery device according to claim 8 or 9, characterized in that: The flow area at any position of the first busbar, the flow area at any position of the second busbar, and the flow area at any position of the output busbar are all the same.

15. The battery device according to any one of claims 1 to 6, characterized in that: The number of columns of the two battery modules is the same or different; and / or the number of rows of the two battery modules is the same or different.

16. The battery device according to any one of claims 1 to 6, characterized in that: The width of the output busbar is adapted to the width of the electrode on the high-voltage box.

17. The battery device according to any one of claims 1 to 6, characterized in that: The output busbar is a structure of equal thickness.

18. The battery device according to any one of claims 1 to 6, characterized in that: The distance between the total positive output pole and the total negative output pole is adapted to the distance between the two electrodes on the high voltage box.

19. The battery device according to any one of claims 1 to 6, characterized in that: The distance between the total positive output pole and the total negative output pole is smaller than the distance between two electrodes on the high-voltage box, and the output bus is a bent structure.

20. The battery device according to any one of claims 1 to 6, characterized in that: The output busbar is connected to the electrode of the high voltage box through a fastener.

21. The battery device according to claim 20, characterized in that The fastener includes a bolt.

22. An electrical device, comprising the battery device according to any one of claims 1 to 21, wherein the battery device is used to provide electrical energy.

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