Battery device and electric device

Abstract

The utility model 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

[0001] This application is required to be filed with the State Intellectual Property Office on November 26, 2024, application number:

[0002] Priority is given to Chinese Patent Application No. 202411697981.X, entitled “Battery Device and Electric Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of battery technology, and in particular relates to a battery device and an electrical device. Background Technology

[0004] Currently, in high-voltage connection technology, the total positive and negative output terminals of the battery module, used for connecting to the high-voltage box, are located at opposite ends of the same row or column. Connecting these terminals to the high-voltage box requires the use of long copper or aluminum adapters. The presence of these long copper or aluminum adapters occupies internal space in the battery device, reducing its space utilization. Utility Model Content

[0005] In view of the above problems, this application provides a battery device and an electrical device, which aims to improve the space utilization of the battery device.

[0006] In a first aspect, embodiments of this application provide a battery device, including a high-voltage box and two battery modules distributed along a first direction. Each battery module includes multiple 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 is arranged along the first direction, and each row of battery cells is arranged along a second direction, which intersects with the first direction. In any battery module, all battery cells in the same column have the same positive and negative electrode distribution, and the positive and negative electrode distributions of battery cells in adjacent columns are opposite. All battery cells in 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 disposed on the two battery modules and on two adjacent battery cells along the first direction. The total positive output electrode and the total negative output electrode are respectively connected to the high-voltage box through output busbars.

[0007] The battery device provided in this application embodiment changes the connection method of the battery cells in the battery device, so that the total positive output terminal and the total negative output terminal of the battery module formed by all battery cells are located on two adjacent battery cells, instead of being located at the two ends of the same row. This makes the distance between the total positive output terminal and the total negative output terminal smaller, so that the high voltage box can be placed adjacent to the total positive output terminal and the total negative output terminal. This makes the length of the output bus between the high voltage box and the total positive output terminal and / or the total negative output terminal smaller, thereby making the output bus occupy less space and improving the space utilization of the battery device to a certain extent.

[0008] In some embodiments, all battery cells in the two battery modules have the same positive and negative electrode distribution, and the total positive output electrode and the total negative output electrode are arranged adjacent to each other. Using the solution provided in this embodiment, compared to arranging the total positive and negative output electrodes separately, the distance between the total positive and negative output electrodes can be further reduced. This allows for a further reduction in the length of the output busbar between the high-voltage box and the total positive and / or total negative output electrodes, resulting in a further reduction in the size of the output busbar and improving the space utilization of the battery device to a certain extent.

[0009] In some embodiments, all battery cells in each battery module are connected in series, and two battery modules are connected in series. Connecting all battery cells in series allows for a larger battery capacity, meeting the needs of high-capacity usage environments.

[0010] 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 connected in series via a first busbar arranged along a first direction. Using the solution provided in this embodiment, the length of the first busbar between two adjacent battery cells in a battery module with one column is relatively short, and all battery cells are arranged in a regular pattern.

[0011] 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 connected in series via a first busbar arranged along a second direction. Using the solution provided in this embodiment, the length of the first busbar between two adjacent battery cells in a battery module with one row is relatively short, and all battery cells are arranged in a regular pattern.

[0012] In some embodiments, at least one battery module has multiple rows and multiple columns; in a battery module with multiple rows and multiple columns, battery cells located in the same column are connected in series via a first busbar arranged along a first direction to form a series module, and all series modules are connected in series via a first busbar arranged along a second direction. Using the solution provided in this embodiment, the length of the first busbar between two adjacent battery cells is relatively short, and all battery cells are arranged in a regular pattern.

[0013] In some embodiments, all battery cells are arranged in a two-dimensional matrix, with two battery modules arranged side by side or in parallel. The battery device employing the solution provided in this embodiment features a well-organized arrangement of battery cells, facilitating design and assembly.

[0014] In some embodiments, the two battery modules may have the same or different number of columns; and / or, the two battery modules may have the same or different number of rows. When the number and arrangement of the battery cells in both battery modules can be the same, this facilitates the design of the two battery modules in the battery device. When the number and arrangement of the battery cells in the two battery modules are different, the battery device can flexibly configure each battery module according to usage needs, adapting to different installation and usage environments.

[0015] In some embodiments, the number of columns in both battery modules is even and the same, and their series electrodes are arranged adjacently and connected by a second busbar. The series electrodes are the electrodes connecting one battery module to the other. Using the solution provided in this embodiment, the distance between the two series electrodes is small, resulting in a shorter second busbar, less space occupied, and a more compact overall battery device structure.

[0016] In some embodiments, the number of columns in both battery modules is odd and the same. Their series electrodes are located at opposite ends of the same column or row and connected via a second busbar. The series electrodes are the electrodes connecting one battery module to the other. Using the solution provided in this embodiment, the distance between the two series electrodes is relatively large, resulting in a longer second busbar, which can be achieved using a long copper or aluminum busbar, meeting the needs of certain usage environments.

[0017] In some embodiments, the battery device further includes a housing, in which the high-voltage box and battery module are housed; a second bus is mounted on the side wall of the housing. Mounting the second bus on the side wall of the housing allows the second bus to occupy minimal or no space within the housing used for device placement, thus making the overall battery device structure compact.

[0018] In some embodiments, the distance between the total positive output terminal and the total negative output terminal is smaller than the distance between the two electrodes on the high-voltage box. Using 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 terminal and the total negative output terminal, allowing battery modules of different specifications to be combined with different types of high-voltage boxes, thus broadening the applicability of the battery device.

[0019] In some embodiments, the output bus includes interconnected aluminum and copper bars. The aluminum bars are connected to individual battery cells, and the copper bars are connected to the high-voltage box.

[0020] The output bus adopts the solution provided in this embodiment, which facilitates the connection between the output bus and the electrodes of the battery cell, and can reduce the resistivity of the output bus to a certain extent, making it suitable for battery devices with limited space and requiring high efficiency and stability.

[0021] In some embodiments, the copper bar includes a rigid copper bar and a flexible copper bar connected to each other. The rigid copper bar is connected to the aluminum bar, and the flexible copper bar is connected to the high-voltage box.

[0022] The copper busbar uses a combination of rigid and flexible copper bars, connecting to the high-voltage box via the flexible copper bar. Due to the good flexibility of the flexible copper bar, it can be bent and deformed according to the position of the electrodes on the high-voltage box, absorbing at least some manufacturing tolerances, facilitating adjustment and installation. This allows the output busbar to be directly latched onto the high-voltage box, ensuring a tight fit between the output busbar and the high-voltage box, achieving a stable direct connection between the battery module and the high-voltage box. Furthermore, the flexible copper bar has high conductivity, which can improve the efficiency and stability of current transmission between the copper bar and the high-voltage box to a certain extent. The rigid copper bar provides structural support and strength, ensuring the overall stability and reliability of the connection.

[0023] In some embodiments, aluminum bars, hard copper bars, and soft copper bars are welded in sequence.

[0024] Welding aluminum, hard copper, and soft copper bars sequentially ensures stable connections between different parts of the output busbar.

[0025] In some embodiments, the distance between the total positive output electrode and the total negative output electrode is smaller than the distance between the two electrodes on the high voltage box, and the soft copper bar has a bent structure.

[0026] This design allows the spacing between electrodes on the high-voltage box to be unrestricted by the spacing between the total positive and negative output electrodes, enabling battery modules of different specifications to be combined with different types of high-voltage boxes, thus broadening the applicability of the battery device. Furthermore, the flexible copper bars are easy to bend and can be bent and deformed according to the position of the electrodes on the high-voltage box, facilitating adjustment and installation, and ensuring a tight fit between the copper bars and the high-voltage box connection.

[0027] In some embodiments, the aluminum bar is a rigid aluminum bar. Using a rigid aluminum bar provides better support for the copper bar.

[0028] In some embodiments, the output bus is connected to the electrodes of the high-voltage box via fasteners. This connection is convenient and ensures a stable connection between the output bus and the electrodes on the high-voltage box.

[0029] Secondly, embodiments of this application provide an electrical device, including a battery device provided by any of the above solutions, the battery device being used to provide electrical energy.

[0030] The effect of the second aspect is the same as that of the first aspect, so it will not be repeated here.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0033] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0034] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0035] Figure 3 This is an exploded structural diagram of a battery cell in a battery device provided in some embodiments of this application;

[0036] Figure 4 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0037] Figure 5 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application;

[0038] Figure 6 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application;

[0039] Figure 7 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application;

[0040] Figure 8 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application;

[0041] Figure 9 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application;

[0042] Figure 10 This is a schematic diagram of the structure of the output busbar in a battery device provided in some embodiments of this application;

[0043] Figure 11 For along Figure 10 Schematic diagram of the cross-sectional structure along line AA.

[0044] The reference numerals in the detailed embodiments are as follows:

[0045] 1000, vehicles;

[0046] 100. Battery assembly; 200. Controller; 300. Motor;

[0047] 10. Housing; 11. Cover; 12. Tray; 20. Battery cell; 21. End cap; 22. Housing; 23. Electrode assembly; 231. Main body; 232. Tab; 30. High voltage box; 40. First busbar; 50. Second busbar; 60. Main positive output terminal; 70. Output busbar; 71. Aluminum bar; 72. Copper bar; 721. Hard copper bar; 722. Soft copper bar; 80. Main negative output terminal; 90. Connecting terminal. Detailed Implementation

[0048] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0051] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0054] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0056] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0057] Currently, in high-voltage connection technology, battery devices typically consist of multiple battery cells arranged in a matrix of m rows and n columns, where m and n are integers greater than or equal to 2. All battery cells are connected in series, with the connection circuit arranged in an S-shape. The total positive and negative output terminals of the battery module, which are connected to the high-voltage box, are located at opposite ends of the same row or column. This results in the total positive and negative output terminals being relatively far apart. Connecting these terminals to the high-voltage box requires long copper or aluminum crossbars. However, these long copper or aluminum crossbars occupy internal space in the battery device, reducing its space utilization.

[0058] To address the aforementioned issues, this application provides a battery device. This battery device alters the connection method of the individual battery cells, causing the total positive and negative output terminals of the battery module formed by all the battery cells to be located on two adjacent battery cells 20, rather than at opposite ends of the same row. This reduces the distance between the total positive and negative output terminals, allowing the high-voltage box to be placed adjacent to them. This results in a shorter output busbar between the high-voltage box and the total positive output terminal, thus reducing the space occupied by the output busbar and improving the space utilization of the battery device to some extent.

[0059] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage devices, energy storage systems, and charging networks that use the battery as an energy storage element. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0060] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0061] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery apparatus 100 is provided inside the vehicle 1000, and the battery apparatus 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery apparatus 100 can be used to power the vehicle 1000. For example, the battery apparatus 100 can serve as the 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 apparatus 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during starting, navigation, and driving.

[0062] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0063] Please refer to Figure 2 , Figure 2This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and battery cells 20, with the battery cells 20 housed within the housing 10.

[0064] The housing 10 provides a storage space for the battery cells 20, and can adopt various structures. In some embodiments, the housing 10 may include a cover 11 and a tray 12. The cover 11 covers the tray, and together with the tray 12, defines a storage space for accommodating the battery cells 20. The tray 12 may be a hollow structure with one open end, and the cover 11 may be a plate-like structure, covering the open side of the tray 12 so that the cover 11 and the tray 12 together define the storage space; the cover 11 and the tray 12 may also be hollow structures with side openings, with the open side of the cover 11 covering the open side of the tray 12. Of course, the housing 10 formed by the cover 11 and the tray 12 can be of various shapes, such as a circular through-hole, a cuboid, etc. The tray 12 is an important structural support component in the battery system, used to store and protect the battery cells, and also has a significant impact on the collision safety of the vehicle and the overall torsional and bending stiffness of the vehicle body.

[0065] Multiple battery cells 20 can be provided, and these cells can be connected in series, parallel, or mixed connection via a busbar. Mixed connection refers to a configuration where multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or mixed connection, and then the entire assembly of these cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or mixed connection to form a battery module, and then these modules are further connected in series, parallel, or mixed connection to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar for electrical connection between the multiple battery cells 20. As an example, multiple battery cells 20 can form a battery module, which is an independent module formed by arranging and fixing multiple battery cells 20. As an example, a battery module can be formed by binding multiple battery cells 20 together with cable ties.

[0066] Each battery cell 20 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. The battery cell can have a circular through-body, a flat body, a cuboid, or other shapes.

[0067] Please refer to Figure 3, Figure 3 This is an exploded structural diagram of a battery cell 20 in a battery device provided in some embodiments of this application. The battery cell 20 refers to the smallest unit that makes up a battery. For example... Figure 3 The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0068] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, allowing battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 251 can be provided on end cap 21. Electrode terminals 251 can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20, and electrode terminals 251 include positive and negative terminals. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0069] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, circular through-hole, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0070] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly, while the portions of the positive and negative electrode plates without active material each constitute a tab 232. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 232 connect to the electrode terminals to form a current loop.

[0071] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application. Figure 4 The battery cells within the space enclosed by the dashed box L1 form a battery module, and the battery cells within the space enclosed by the dashed box L2 form a battery module. This 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 and negative electrodes of any battery cell 20 are spaced apart along the first direction X.

[0072] 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 specific needs 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 them can be the same or different. For example, when both battery modules have 8 battery cells 20, the two battery modules can each form a 2*4 array, such as... Figure 4 As shown; the two battery modules can also form a 1*8 array one and a 2*4 array the other, depending on the shape of the installation space for the battery device. When the number of battery cells 20 in the two battery modules is different, the arrays they form are generally different, such as... Figure 5 As shown; one battery module has 4 battery cells 20, and the other battery module has 8 battery cells 20. The former battery module can form a 1*4 array, and the latter battery module can form a 2*4 array.

[0073] 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, with the second direction Y intersecting the first direction X. In any battery module, all battery cells 20 in the same column have the same positive and negative electrode distribution, while the positive and negative electrode distributions of battery cells 20 in adjacent columns are opposite.

[0074] All battery cells 20 of the two battery modules are electrically connected to form a total positive output terminal 60 and a total negative output terminal 80. The total positive output terminal 60 and the total negative output terminal 80 are respectively located on the two battery modules and on two adjacent battery cells 20 along the first direction X. The total positive output terminal 60 and the total negative output terminal 80 are respectively connected to the high voltage box 30 through the output bus 70.

[0075] The high-voltage box 30, sometimes referred to as the High Voltage Distribution Unit (HVDU) or high-voltage control unit, is a crucial component connecting the high-voltage battery to other high-voltage electrical components such as motors, inverters, and chargers. 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 from overcurrent or short circuits; 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. Grounding connection: Ensuring proper grounding of the high-voltage system, which is crucial for personal safety; 5. Relay control: Opening or closing the high-voltage circuit by controlling relays.

[0076] In the battery device, all battery cells 20 can form a regular two-dimensional matrix, or they can be arranged in an L-shaped array, that is, the number of columns or rows of two battery modules are different; or, some of the battery cells 20 can be arranged in an array, and the other part can not be arranged in an array.

[0077] When the battery device is arranged in a two-dimensional matrix, a portion of the battery cells 20 arranged in a one-dimensional or two-dimensional array can form one battery module, and the remaining battery cells 20 arranged in a one-dimensional or two-dimensional array can form another battery module.

[0078] When only a portion (hereinafter referred to as the first portion) of the battery device is arranged in a two-dimensional array, and another portion (hereinafter referred to as the second portion) is located outside the first portion, it may be arranged in an array or not. In this case, in the portion of the battery device arranged in a two-dimensional array (i.e., the first portion), a portion of the battery cells 20 arranged in a one-dimensional or two-dimensional array can form one battery module, and the remaining battery cells 20 arranged in a one-dimensional or two-dimensional array can form another battery module; or, a portion of the battery cells 20 in the first portion and the second portion form one battery module, and the remaining portion of the first portion forms another battery module; or, a portion of the battery cells 20 in the first portion and a portion of the second portion form one battery module, and the remaining portion of the first portion and the remaining portion of the second portion form another battery module.

[0079] In this embodiment, the number of rows and columns of the two battery modules can be the same or different, depending on the usage requirements.

[0080] In this embodiment, each battery module can use the length direction of the battery cell 20 as the arrangement direction of multiple battery cells 20 in a single row, i.e., the first direction X mentioned above; and the width direction of the battery cell 20 as the arrangement direction of multiple battery cells 20 in a single row, i.e., the second direction Y mentioned above. In other embodiments, other directions that form an acute angle with the length direction of the battery cell 20 can also 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, depending on the usage requirements.

[0081] In any given battery module, all battery cells 20 in the same column have the same positive and negative electrode distribution, while battery cells 20 in adjacent columns have opposite positive and negative electrode distributions, such as... Figure 4 To illustrate from the perspective shown, in each battery module, viewed from left to right, the battery cells in the first column all have the negative electrode on top and the positive electrode on the bottom; the battery cells in the second column all have the positive electrode on top and the negative electrode on the bottom; the battery cells in the third column all have the negative electrode on top and the positive electrode on the bottom; and the battery cells in the fourth column all have the positive electrode on top and the negative electrode on the bottom. It is understood that in other embodiments, in any battery module, the positive and negative electrode distribution of all battery cells 20 in the same column is the same, while the positive and negative electrode distribution of battery cells 20 in adjacent columns is opposite. This can also be expressed as follows: In each battery module, viewed from left to right, the battery cells in the first column all have the positive electrode on top and the negative electrode on the bottom; the battery cells in the second column all have the negative electrode on top and the positive electrode on the bottom; the battery cells in the third column all have the positive electrode on top and the negative electrode on the bottom; and the battery cells in the fourth column all have the negative electrode on top and the positive electrode on the bottom.

[0082] The battery cells of the two battery modules can be connected in series or in a mixed configuration, depending on the application requirements. Each battery module ultimately forms only one output terminal, and the polarities of the output terminals of the two battery modules are opposite. One output terminal is positive, denoted as the total positive output terminal 60, and the other output terminal is negative, also denoted as the total positive output terminal 60.

[0083] The output bus 70 is a copper or aluminum bus that connects the battery module and the high-voltage box 30. It can also be other electrical connectors that enable the battery module and the high-voltage box 30 to be connected in series.

[0084] The total positive output pole 60 and the total negative output pole 80 are located on two adjacent battery cells 20 along the first direction X. This means that the battery cell with the total positive output pole 60 and the battery cell with the total negative output pole 80 are located in the same column, and there are no other battery cells between them.

[0085] The assembly principle of the battery device provided in this application embodiment is as follows:

[0086] During assembly, first determine the positions of the total positive output terminal 60 and the total negative output terminal 80, as well as the range of the two battery modules, based on the position of the high voltage box 30 or the electrical connection requirements. Then, within each battery module, connect all battery cells 20 in series, parallel, or mixed, starting from the total positive output terminal 60 or the total negative output terminal 80. Connect the two battery modules in series, and finally connect the total positive output terminal 60 and the high voltage box 30, as well as the total negative output terminal 80 and the high voltage box 30, through the output bus 70.

[0087] The battery device provided in this application embodiment changes the connection method of the battery cells 20 in the battery device, so that the total positive output pole 60 and the total negative output pole 80 of the battery module formed by all battery cells 20 are located on two adjacent battery cells 20, instead of being located at the two ends of the same row. This makes the distance between the total positive output pole 60 and the total negative output pole 80 smaller, so that the high voltage box 30 can be placed adjacent to the total positive output pole 60 and the total negative output pole 80, so that 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 is smaller, thereby making the output bus 70 occupy less space and improving the space utilization of the battery device to a certain extent.

[0088] In some embodiments, all battery cells 20 of the two battery modules have the same positive and negative electrode distribution. The total positive output electrode 60 and the total negative output electrode 80 are arranged adjacent to each other.

[0089] Using the solution provided in this embodiment, the positive electrode of a battery cell 20 in one battery module is arranged adjacent to the negative electrode of a battery cell 20 in another battery module, thereby making the total positive output electrode 60 and the total negative output electrode 80 adjacent. Compared with the total positive output electrode 60 and the total negative output electrode 80 being spaced apart, the distance between the total positive output electrode 60 and the total negative output electrode 80 can be further reduced, thereby further reducing the length of the output busbar 70 between the high voltage box 30 and the total positive output electrode 60 and / or the total negative output electrode 80, making the output busbar 70 even smaller, and improving the space utilization of the battery device to a certain extent.

[0090] In some embodiments, all battery cells 20 in each battery module are connected in series, and two battery modules are connected in series.

[0091] With all 20 battery cells connected in series, the battery device has a large capacity, which can meet the needs of high-capacity usage environments.

[0092] 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 20 are connected in series via a first busbar 40 arranged along a first direction.

[0093] The first busbar 40 is a copper or aluminum bar for the series connection of the battery cells 20, and can also be other electrical connectors that enable the series connection of the battery cells 20.

[0094] The first busbar 40 set along the first direction means that the length direction of the first busbar 40 is set along the first direction.

[0095] By adopting the solution provided in this embodiment, the length of the first busbar 40 between two adjacent battery cells 20 in a battery module with one column can be relatively short, and all battery cells 20 can be arranged in a regular manner.

[0096] 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 connected in series via a first busbar 40 arranged along a second direction.

[0097] The first busbar 40 set along the second direction means that the length direction of the first busbar 40 is set along the second direction.

[0098] By adopting the solution provided in this embodiment, the length of the first busbar 40 between two adjacent battery cells 20 in a battery module with one row is relatively short, and all battery cells 20 are arranged in a regular manner.

[0099] In some embodiments, at least one battery module has multiple rows and multiple columns. In a battery module with multiple rows and multiple columns, battery cells 20 located in the same column are connected in series via a first busbar 40 arranged along a first direction to form a series module, and all series modules are connected in series via a first busbar 40 arranged along a second direction.

[0100] Because the positive and negative electrode distributions of battery cells 20 in the same row and the same column of the battery modules in the battery device provided in this application embodiment are the same, and the battery cells 20 in the same column are connected in series through the first busbar 40 to form a series module, and all series modules are connected in series through the first busbar 40. The circuits formed by the series connection of each battery cell 20 in the two battery modules are all S-shaped, and the two S-shaped circuits formed by the two battery modules are arranged opposite to each other, that is, the battery device presents two S-shaped series structures.

[0101] Using 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 in a regular manner.

[0102] 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.

[0103] A two-dimensional matrix refers to a rectangular array of all 20 battery cells arranged in an m*n pattern, where m and n are both greater than or equal to 2.

[0104] Two battery modules can be arranged sequentially along a single row or a single column. Arranging two battery modules side-by-side or side-by-side means that when arranged sequentially along a single row, each row of the two battery modules corresponds to the first row, and the 'a'th row is aligned with the first row, where 'a' is greater than 1 and less than or equal to 'm'. When arranged sequentially along a single column, each column of the two battery modules corresponds to the first column, and the 'b'th column is aligned with the first column, where 'b' is greater than 1 and less than or equal to 'n'.

[0105] 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.

[0106] like Figure 4 As shown, in some embodiments, the number of columns in both battery modules is even and the same, and their series terminals are arranged adjacently and connected by a second bus 50. The series terminals are electrodes connecting one battery module to another.

[0107] The second busbar 50 is a copper or aluminum bar for the series connection of the battery cells 20, and can also be other electrical connectors that enable the series connection of the battery cells 20.

[0108] The solution provided in this embodiment has a smaller distance between the two series electrodes, which makes the length of the second busbar 50 smaller and the space occupied smaller, resulting in a compact overall battery device structure.

[0109] Figure 7 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application. Figure 8 The diagram illustrates the structure of a battery device provided in other embodiments of this application. Figures 6 to 8 As shown, in some embodiments, the number of columns for both battery modules is odd and the same. Their series electrodes are located at opposite ends of the same column or row and connected via a second busbar 50. The series electrodes are the electrodes connecting one battery module to the other. Using the solution provided in this embodiment, the distance between the two series electrodes is relatively large, resulting in a longer second busbar 50, which can be achieved using a long copper or aluminum busbar, meeting the needs of various usage environments.

[0110] Figure 6The diagram illustrates the structure of a battery device provided in other embodiments of this application. Figure 6 As shown, in some embodiments, the battery device also includes a housing 10, with the high-voltage box 30 and the battery module all housed within the housing 10.

[0111] In this embodiment, the shape of the box 10 can be rectangular, L-shaped, or other shapes, depending on the usage requirements.

[0112] Using 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 housing 10 to form a whole, which facilitates the overall movement and assembly of the battery device.

[0113] In some embodiments, the second busbar 50 is mounted on the side wall of the housing 10.

[0114] The housing 10 generally consists of a base plate and a frame. The frame is formed by multiple side beams connected end to end, and expansion beams can also be installed within the cavity enclosed by the frame. The two ends of the expansion beams are connected to the side beams that make up the frame. The aforementioned side beams and expansion beams are each formed by multiple side walls connected end to end. The side wall in which the second busbar 50 rests on the side wall of the housing 10 refers to the side wall of the expansion beam or side beam that is in contact with the battery cell 20 and is adjacent to the second busbar 50.

[0115] By adopting the solution provided in this embodiment, the second busbar 50 is placed on the side wall of the housing 10, which allows the second busbar 50 to not occupy the space in the housing 10 used for placing devices, or to occupy as little space in the housing 10 used for placing devices as possible, thereby making the overall battery device structure compact.

[0116] like Figure 9 As shown, in some embodiments, the battery device further includes a connection terminal 90, a portion of which is located outside the housing 10, and another portion passes through the side wall of the housing 10 and is directly connected to the high-voltage box 30.

[0117] The connection terminal 90 is the electrode terminal for the battery device to connect to external electrical components. There are two connection terminals 90, one of which is positive and the other is negative. The two connection terminals 90 are connected to the positive output terminal and the negative output terminal of the high-voltage box 30, respectively.

[0118] In related technologies, the connecting terminal 90 is connected to the high-voltage box 30 via an adapter plate. In this embodiment, the connecting terminal 90 is directly connected to the high-voltage box 30. Compared with related technologies, the adapter plate between the connecting terminal 90 and the high-voltage box 30 can be eliminated, making the battery device compact, smaller in size, and easier to assemble.

[0119] In some embodiments, the width and thickness of the first bus 40 and the second bus 50 are the same.

[0120] 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. In this embodiment, the width refers to the dimension of the first busbar 40 and the second busbar 50 in their own width direction, and the thickness refers to the dimension of the first busbar 40 and the second busbar 50 in their own thickness direction.

[0121] By employing the solution provided in this embodiment, the current-carrying areas of the first busbar 40 and the second busbar 50 can be made the same. The current-carrying area refers to the cross-sectional area of ​​the first busbar 40, the second busbar 50, or the output busbar 70 that the current passes through during propagation. This minimizes resistance loss as the current flows through different busbars, thereby reducing energy loss and helping to extend the lifespan of the battery device.

[0122] like Figure 8 As shown, in some embodiments, the width d1 of the portion of the output bus 70 at least connected to the electrodes of the high-voltage box 30 is less than the width d3 of the first bus 40 and / or the second bus 50, and the thickness of the portion of the output bus 70 at least connected to the electrodes of the high-voltage box 30 is greater than the thickness of the first bus 40 and / or the second bus 50.

[0123] The part connected to the electrodes of the high-voltage box 30 refers to the part of the output bus 70 that contacts the electrodes of the high-voltage box 30.

[0124] The following are some cases where the width of the portion of the output bus 70 connected to the electrodes of the high-voltage box 30 is less than the width of the first bus 40 and / or the second bus 50: First, the width of the portion of the output bus 70 connected only to the electrodes of the high-voltage box 30 is less than the width of the first bus 40 and / or the second bus 50, while the width of the other portions of the output bus 70 is the same as that of the first bus 40 or the second bus 50; Second, the width of any portion of the output bus 70 is less than the width of the first bus 40 and / or the second bus 50.

[0125] The following are some cases where the thickness of 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: First, the thickness of the portion of the output bus 70 connected only 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, while the thickness of the 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.

[0126] In this embodiment, the thickness of the portion of the output bus 70 that is at least 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 ​​the portion of the output bus 70 that is at least 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.

[0127] Since the width of the electrodes of the high-voltage box 30 is generally smaller than the width of the first busbar 40 or the second busbar 50, the solution provided in this embodiment can make the width of at least the portion of the output busbar 70 that contacts the electrodes of the high-voltage box 30 match the width of the electrodes of the high-voltage box 30. Furthermore, the current-carrying area of ​​at least the portion of the output busbar 70 that contacts the electrodes of the high-voltage box 30 is not significantly different from the current-carrying area of ​​the first busbar 40 or the second busbar 50. This results in less resistance loss as the current flows through different busbars, thereby reducing energy loss and helping to extend the lifespan of the battery device.

[0128] In some embodiments, the overcurrent area at any location of the first bus 40, the overcurrent area at any location of the second bus 50, and the overcurrent area at any location of the output bus 70 are all the same.

[0129] The solution provided in this embodiment can minimize resistance loss as current flows through different busbars, thereby reducing energy loss and helping to extend the lifespan of the battery device.

[0130] like Figure 4 As shown, in some embodiments, the two battery modules may have the same or different number of columns; and / or, the two battery modules may have the same or different number of rows.

[0131] The solution provided in this embodiment includes at least the following situations: First, the two battery modules have the same number of columns and the same number of rows; Second, the two battery modules have the same number of columns and different numbers of rows; Third, the two battery modules have different numbers of columns and the same number of rows; Fourth, the two battery modules have different numbers of columns and different numbers of rows.

[0132] When the number and arrangement of the battery cells 20 in the two battery modules are the same, it facilitates the design of the two battery modules in the battery device.

[0133] When the number and arrangement of the battery cells 20 in 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 the needs of use, so as to adapt to different installation and use environments.

[0134] like Figure 8 As shown, in some embodiments, the width d1 of the output bus 70 is adapted to the width d2 of the electrode on the high voltage box 30.

[0135] The width of the output bus 70 and the width of the electrodes on the high voltage box 30 refer to the dimensions of both in the same direction, such as the dimensions in the width direction of the output bus 70.

[0136] The width of the output bus 70 is matched with the width of the electrodes on the high-voltage box 30, meaning 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, which is set according to installation requirements.

[0137] The solution provided in this embodiment has a large contact area between the output bus 70 and the electrodes on the high voltage box 30, which can ensure stable current transmission at the connection between the output bus 70 and the high voltage box 30, and also prevent the output bus 70 from being too large and taking up too much space.

[0138] In some embodiments, the output bus 70 has a uniform thickness structure.

[0139] The output bus 70 having a uniform thickness structure means that the thickness of the output bus 70 is the same or approximately the same at any position. Approximately the same means that the difference in thickness between any two corresponding positions is less than or equal to 5% of the thickness at any other position.

[0140] The solution provided in this embodiment ensures that the flow area remains consistent at any location of the output busbar 70.

[0141] In some embodiments, the spacing d4 between the total positive output electrode 60 and the total negative output electrode 80 is adapted to the spacing d5 between the two electrodes on the high voltage box 30.

[0142] The spacing d4 between the total positive output pole 60 and the total negative output pole 80 refers to the minimum spacing between the two opposing surfaces of the total positive output pole 60 and the total negative output pole 80.

[0143] The distance d5 between the two electrodes on the high voltage box 30 refers to the minimum distance between the two surfaces on which the two electrodes are positioned.

[0144] "Adaptation" refers to the spacing d4 between the total positive output terminal 60 and the total negative output terminal 80 being the same as or differing from the spacing d5 between the two electrodes on the high-voltage box 30 within a preset range. The preset range can be within 5% or 10% of either of the two spacings mentioned above, and the specific range can be determined according to installation requirements.

[0145] Using the solution provided in this embodiment, the total positive output pole 60 and the total negative output pole 80 can correspond one-to-one with the two electrodes, so the output bus 70 can adopt a straight plate structure, which is simple and easy to assemble.

[0146] Figure 9 The diagram illustrates the structure of a battery device provided in other embodiments of this application. Figure 9 As shown, in some embodiments, the spacing between the total positive output electrode 60 and the total negative output electrode 80 is smaller than the spacing between the two electrodes on the high voltage box 30.

[0147] In this embodiment, the positions of the total positive output pole 60 and the total negative output pole 80 are no longer corresponding to the positions of the two electrodes, but are staggered. This allows the spacing between the electrodes on the high voltage box 30 to be unrestricted by the spacing between the total positive output pole 60 and the total negative output pole 80, enabling battery modules of different specifications to be combined with different types of high voltage boxes 30, thus making the battery device more widely applicable.

[0148] Figure 10 This is a schematic diagram of the output bus structure in a battery device provided in some embodiments of this application. Figure 11 For along Figure 10 A schematic diagram of the cross-sectional structure along line AA. (See diagram below.) Figure 10 and Figure 11 As shown, in some embodiments, the output bus 70 includes an aluminum bus 71 and a copper bus 72 connected to each other. The aluminum bus 71 is connected to the battery cell 20, and the copper bus 72 is connected to the high-voltage box 30.

[0149] In this embodiment, the aluminum bar 71 and the copper bar 72 can be connected by welding, crimping, or other methods. When the aluminum bar 71 and the copper bar 72 are connected by welding, they can be connected by friction welding, ultrasonic welding, or other methods.

[0150] Since the electrodes of the battery cell 20 are usually made of aluminum or nickel, in order to facilitate the connection between the output bus 70 and the electrodes of the battery cell 20, the connection part between the output bus 70 and the electrodes of the battery cell 20 can be made of aluminum bar 71.

[0151] Furthermore, due to the high resistivity of the aluminum bus 71, a larger cross-sectional area may be required to maintain the same current carrying capacity if the aluminum bus 71 is used for long-distance power transmission in order to compensate for the high resistivity. This increases the amount of material used and the weight, making it unsuitable for battery devices with limited space and requiring high efficiency and stability. Therefore, the output bus 70 adopts the solution provided in this embodiment, which facilitates the connection between the output bus 70 and the electrodes of the battery cell 20, and can also reduce the resistivity of the output bus 70 to a certain extent, making it suitable for battery devices with limited space and requiring high efficiency and stability.

[0152] In some embodiments, the copper bar 72 includes a rigid copper bar 721 and a flexible copper bar 722 connected to each other. The rigid copper bar 721 is connected to the aluminum bar 71, and the flexible copper bar 722 is connected to the high-voltage box.

[0153] Among them, hard copper 721 is made by cold working (such as cold rolling and cold drawing), which has high hardness and strength and is not easy to bend.

[0154] Soft copper bar 722 is made through annealing and is composed of multiple copper sheets stacked together. It has high conductivity and flexibility, and is easy to bend and deform, but has low hardness and strength.

[0155] Hard copper bar 721 and soft copper bar 722 can be connected by welding, crimping, etc. When aluminum bar 71 and copper bar 72 are connected by welding, aluminum bar 71 and copper bar 72 can be connected by argon arc welding, resistance welding, etc.

[0156] The copper bus 72 uses a combination of rigid copper bus 721 and flexible copper bus 722 for connection, and is connected to the high-voltage box through the flexible copper bus 722. Due to the good flexibility of the flexible copper bus 722, it can be bent and deformed according to the position of the electrodes on the high-voltage box, which can absorb at least part of the manufacturing tolerances, making it easy to adjust and install. This allows the output bus 70 to be directly attached to the high-voltage box, and ensures that the connection between the output bus 70 and the high-voltage box 30 is tightly fitted, achieving a stable direct connection between the battery module and the high-voltage box. In addition, the flexible copper bus 722 has high conductivity, which can improve the efficiency and stability of current transmission between the copper bus 72 and the high-voltage box to a certain extent. The rigid copper bus 721 provides structural support and strength, which can improve the stability and reliability of the overall connection.

[0157] In some embodiments, aluminum bar 71, hard copper bar 721 and soft copper bar 722 are welded in sequence.

[0158] Among them, aluminum bar 71 and hard copper bar 721 can be welded by friction welding, explosive welding, brazing and other methods, while hard copper bar 721 and soft copper bar 722 can be welded by argon arc welding, gas welding, resistance welding and other methods.

[0159] Welding aluminum busbar 71, hard copper busbar 721, and soft copper busbar 722 in sequence can ensure stable connection of different parts of the output busbar 70.

[0160] In some embodiments, ultrasonic welding is used to weld the hard aluminum bar and the hard copper bar 721, while hot-press welding is used to weld the hard copper bar 721 and the soft copper bar 722. The application of the soft copper bar 722 effectively absorbs manufacturing tolerances and ensures the reliability of the high-voltage connection; since the soft copper bar 722 cannot be directly welded to the hard aluminum bar, the application of the hard copper bar 721 serves as a transitional step.

[0161] like Figures 9 to 10As shown, in some embodiments, the distance between the total positive output electrode 60 and the total negative output electrode 80 is smaller than the distance between the two electrodes on the high voltage box 30, and the soft copper bar 722 has a bent structure.

[0162] This design allows the spacing between the electrodes on the high-voltage box 30 to be unrestricted by the spacing between the total positive output electrode 60 and the total negative output electrode 80, enabling battery modules of different specifications to be combined with different types of high-voltage boxes 30, thus broadening the applicability of the battery device. Furthermore, the flexible copper bar 722 is easy to bend and can be bent and deformed according to the position of the electrodes on the high-voltage box 30, facilitating adjustment and installation, and ensuring a tight fit between the copper bar 72 and the connection point of the high-voltage box 30.

[0163] In some embodiments, aluminum bar 71 is a hard aluminum bar.

[0164] Hard aluminum bars refer to aluminum bars made through cold working (such as cold rolling and cold drawing), which have high hardness and strength.

[0165] The aluminum busbar 71, made of hard aluminum, provides better support for the copper busbar 72. In some embodiments, the output busbar 70 is connected to the electrodes of the high-voltage box 30 via fasteners.

[0166] Fasteners are a type of mechanical component used to connect the electrodes of the output busbar 70 and the high voltage box 30, and may include bolts, pins, clips, etc.

[0167] The output bus 70 is connected to the electrodes of the high voltage box 30 by fasteners, which is convenient and can make the connection between the output bus 70 and the electrodes on the high voltage box 30 stable.

[0168] In some embodiments, the fastener includes a bolt.

[0169] In this embodiment, the fasteners may include only bolts, or they may include both bolts and other components such as washers and nuts, depending on the specific needs of use.

[0170] The fastener adopts the structure provided in this embodiment, which facilitates material sourcing and assembly / disassembly.

[0171] According to some embodiments of this application, this application also provides an electrical device, including a battery device provided by any of the above solutions. The battery device is used to provide electrical energy.

[0172] The electrical device can be any of the aforementioned battery-powered devices or systems.

[0173] The electrical device provided in this application embodiment includes the battery device described above and can achieve the same effect, which will not be repeated here.

[0174] like Figures 4 to 9As shown, one embodiment of this application provides a battery device, relating to the fields of power batteries, energy storage batteries, and mechanical devices. The battery device includes a housing 10, a high-voltage box 30 disposed within the housing 10, and multiple battery cells 20. The multiple battery cells 20 are arranged in a two-dimensional matrix. The positive and negative electrodes of each battery cell 20 are arranged in the same way. A portion of the battery cells 20 arranged in a one-dimensional or two-dimensional array form a battery module, while the remaining battery cells 20 arranged in a one-dimensional or two-dimensional array form another battery module. The columns in the two battery modules are arranged in a one-to-one correspondence.

[0175] In the battery device, the positive and negative electrodes of all battery cells 20 are spaced apart along a first direction, which is the length direction of the battery cell.

[0176] In the same battery module, battery cells 20 located in the same column are connected in series via a first busbar 40 arranged along a first direction to form a series module. All series modules are connected in series via a first busbar 40 arranged along a second direction. Two battery modules are connected in series via a second busbar 50. The second direction is perpendicular to the first direction.

[0177] Each battery module has a total output terminal. The total output terminal is connected to the high-voltage box 30 via an output bus 70. The total output terminals of the two battery modules have opposite polarities and are located in the same column and adjacent to each other. One of the two total output terminals is positive (total positive output terminal 60), and the other is negative (total negative output terminal 80). The output bus 70 includes a hard aluminum bar, a hard copper bar 721, and a soft copper bar 722 welded together in sequence. The hard aluminum bar and the hard copper bar 721 are welded using ultrasonic welding, while the hard copper bar 721 and the soft copper bar 722 are welded using a hot-press welding process. The hard aluminum bar is connected to the battery cell, and the soft copper bar is connected to the high-voltage box.

[0178] In this embodiment, each battery module starts from the total output terminal and connects the positive and negative terminals of all battery cells in series in an S-shaped manner in a direction away from the other battery module.

[0179] Regardless of whether the battery cells are arranged in even rows * even columns, even rows * odd columns, odd rows * even columns, or odd rows * odd columns, a double S-shaped high-voltage connection method can ensure that the total positive output aluminum bar and the total negative output aluminum bar are relatively close to each other. The high-voltage box 30 is installed directly in front of the total positive output aluminum bar and the total negative output aluminum bar. The aluminum bars can be directly connected to the high-voltage box 30 and secured with bolts, realizing a direct connection between the battery module and the high-voltage box 30. To adapt to different models of high-voltage box 30, the output bus can be adjusted to any shape while meeting the overcurrent capacity, thereby achieving a direct connection with different models of high-voltage box 30.

[0180] The connection method of the battery device using the above-mentioned related technologies has at least two drawbacks: 1. The presence of the above-mentioned long copper or aluminum bars results in a large amount of material required for the battery device, and higher manufacturing and installation costs; 2. The above-mentioned long copper or aluminum bars occupy the internal space of the battery device, reducing the space utilization rate of the battery device.

[0181] This embodiment employs a novel copper-aluminum high-voltage connection arrangement. By using a double S-shaped orientation of the aluminum busbar bridging the battery module, the positions of the total positive and negative output terminals in the battery device are altered. This allows the output aluminum busbar (i.e., the output busbar) to be directly connected and locked onto the high-voltage box 30, achieving a direct connection between the battery module and the high-voltage box 30. This reduces the length of the aforementioned output aluminum busbar, saves costs, and improves the space utilization of the battery device. Furthermore, the aforementioned total positive or total negative output aluminum busbar can be adapted to different models of high-voltage box 30 by changing its shape, thereby expanding the applicability of the direct connection scheme between the battery module and the high-voltage box 30.

[0182] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This 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 device, characterized in that, It includes a high-voltage box and two battery modules distributed along a first direction. Each battery module includes multiple battery cells arranged in an array, and the positive and negative electrodes of any battery cell are distributed at intervals along the first direction. In any of the battery modules, each column of battery cells is arranged along the first direction, and each row of battery cells is arranged along the second direction, with the second direction intersecting the first direction; In any of the battery modules, all the battery cells in the same column have the same positive and negative electrode distribution, while the battery cells in adjacent columns have opposite positive and negative electrode distributions. All the battery cells of the two battery modules are electrically connected to form a total positive output terminal and a total negative output terminal; the total positive output terminal and the total negative output terminal are respectively disposed on the two battery modules and on two adjacent battery cells along the first direction; the total positive output terminal and the total negative output terminal are respectively connected to the high voltage box through output busbars.

2. The battery device according to claim 1, characterized in that, All the battery cells in the two battery modules have the same positive and negative electrode distribution, and the total positive output electrode and the total negative output electrode 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 connected in series through a first busbar 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 connected in series through a first busbar 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 multiple columns; in the battery modules with multiple rows and multiple columns, the battery cells located in the same column are connected in series to form a series module through a first busbar arranged along the first direction, and all the series modules are connected in series through the first busbar 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 two battery modules are arranged side by side or in parallel.

8. The battery device according to claim 7, characterized in that, Both battery modules have an even number of columns and are the same. Their series terminals are arranged adjacently and connected by a second busbar. The series terminals are electrodes that connect the battery module to the other battery module.

9. The battery device according to claim 7, characterized in that, Both battery modules have an odd number of columns and are the same. Their series electrodes are located at both ends of the same column or row and connected by a second busbar. The series electrodes are the electrodes that connect the battery module to the other battery module.

10. The battery device according to claim 9, characterized in that, The battery device also includes a housing, in which the high-voltage box and the battery module are both housed, and the second busbar is placed on the side wall of the housing.

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

12. The battery device according to any one of claims 1-6, characterized in that, The distance between the total positive output electrode and the total negative output electrode is less than the distance between the two electrodes on the high voltage box.

13. The battery device according to any one of claims 1-6, characterized in that, The output bus includes an aluminum bus and a copper bus that are connected to each other. The aluminum bus is connected to the battery cell, and the copper bus is connected to the high voltage box.

14. The battery device according to claim 13, characterized in that, The copper bar includes a hard copper bar and a soft copper bar that are connected to each other. The hard copper bar is connected to the aluminum bar, and the soft copper bar is connected to the high-voltage box.

15. The battery device according to claim 14, characterized in that, The aluminum bar, the hard copper bar, and the soft copper bar are welded in sequence.

16. The battery device according to claim 14, characterized in that, The distance between the total positive output electrode and the total negative output electrode is smaller than the distance between the two electrodes on the high voltage box, and the soft copper bar has a bent structure.

17. The battery device according to claim 13, characterized in that, The aluminum bar is a hard aluminum bar.

18. The battery device according to any one of claims 1-6, characterized in that, The output busbar is connected to the electrodes of the high-voltage box via fasteners.

19. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1-18, the battery device being used to provide electrical energy.

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