Battery device and electric device

Abstract

The invention discloses a battery device and a power utilization device. The battery device comprises a first battery module, a second battery module, a first circuit board and a second circuit board, wherein the side part, facing the second battery module, of the first circuit board is provided with a first terminal; the second circuit board is arranged along the direction opposite to the first direction, the second circuit board is provided with a main body part and a connecting part which are arranged in sequence, the main body part is electrically connected with a plurality of second batteries and is used for collecting signals of the second batteries, the connecting part is provided with a second terminal, and the second terminal is connected with the first terminal. The first circuit board is provided with the first terminal, the second circuit board is provided with the second terminal, the first circuit board and the second circuit board can be coupled through cooperation of the first terminal and the second terminal, additional wiring harness connection is not needed, space occupation is reduced, and the modular design facilitates installation and maintenance. The internal arrangement of the battery device is more reasonable.

Description

Technical Field

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

[0002] Battery devices are widely used in electronic devices such as electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools. A problem with battery devices in related technologies is that their internal layout is often inefficient, making installation and maintenance difficult. Summary of the Invention

[0003] In view of the above problems, this application provides a battery device and an electrical device. The first circuit board of the battery device can be connected to the second terminal of the second circuit board through the first terminal, without the need for additional wiring harnesses to achieve series and parallel connection, which can reduce the wiring harness arrangement and facilitate installation and maintenance.

[0004] One technical solution adopted in this application is to provide a battery device, which includes a first battery module, a second battery module, a first circuit board, and a second circuit board. The first battery module includes a plurality of first batteries; the second battery module includes a plurality of second batteries, and the second battery module is located on one side of the first battery module along a first direction. The first circuit board is electrically connected to the plurality of first batteries and is used to collect signals from the first batteries. Along the first direction, the side of the first circuit board facing the second battery module is provided with a first terminal. The second circuit board, in the opposite direction to the first direction, has a main body and a connecting part arranged sequentially. The main body is electrically connected to the plurality of second batteries and is used to collect signals from the second batteries. The connecting part is provided with a second terminal, which is connected to the first terminal.

[0005] In one possible implementation, the first circuit board is a flexible circuit board.

[0006] In one possible implementation, the second circuit board is a flexible circuit board.

[0007] In one possible implementation, the second terminal is configured to be plugged into the first terminal.

[0008] In one possible implementation, the first circuit board has a first line and a second line, and the second circuit board has a third line. The first line is used to collect signals from the first battery, and the third line is used to collect signals from the second battery. The second line is coupled to a first terminal, and the third line is coupled to a second terminal. The second line is used to transmit the signals from the second battery collected by the third line.

[0009] In one possible implementation, the battery device further includes a battery management module and a data acquisition circuit connector. Along a first direction, the battery management module is located on the side of the first battery module facing away from the second battery module. The first and second lines are electrically connected to the battery management module via the data acquisition circuit connector.

[0010] In one possible implementation, a plurality of first batteries and a plurality of second batteries are arranged along a first direction, and there are multiple first battery modules and multiple second battery modules. The plurality of first battery modules and the plurality of second battery modules are arranged along a second direction; the first direction and the second direction are perpendicular.

[0011] In one possible implementation, the battery device includes a first busbar component. A plurality of first busbar components are provided on both sides of the first circuit board along a second direction. The plurality of first busbar components on each side are arranged at intervals along a first direction. Two adjacent first batteries are electrically connected through the first busbar components.

[0012] In one possible implementation, the battery device includes a second busbar component. A plurality of second busbar components are provided on both sides of the second circuit board along a second direction. The plurality of second busbar components on each side are arranged at intervals along a first direction. Two adjacent second batteries are electrically connected through the second busbar components.

[0013] In one possible implementation, the battery device includes a third busbar component, and in a first direction, adjacent first battery modules and second battery modules are electrically connected via the third busbar component.

[0014] In one possible implementation, the battery device includes a fourth busbar along a first direction, the fourth busbar being located on the side of the second battery module opposite to the first battery module, and the fourth busbar being electrically connected to two second batteries of two adjacent second battery modules along a second direction.

[0015] In one possible implementation, the battery device includes a fifth busbar along a first direction, the fifth busbar being located on the side of the first battery module away from the second battery module, and the fifth busbar being electrically connected to two first batteries of two adjacent first battery modules along a second direction.

[0016] In one possible implementation, multiple first battery modules and multiple second battery modules are connected as a whole through a first busbar, a second busbar, a third busbar, a fourth busbar, and a fifth busbar.

[0017] In one possible implementation, along a third direction, the first circuit board is located on one side of the first battery module, and the second circuit board is located on one side of the second battery module; along a third direction, the first circuit board and the first busbar are offset from each other. The second circuit board and the second busbar are also offset from each other; wherein, the third direction is perpendicular to the first direction and the third direction is perpendicular to the second direction.

[0018] In one possible implementation, the battery device further includes a first high-low voltage isolation plate and a second high-low voltage isolation plate. The first high-low voltage isolation plate is disposed on the first battery module and has a first receiving groove and a plurality of second receiving grooves. Along a third direction, the depth of the first receiving groove is different from the depth of the second receiving groove. A first circuit board is disposed in the first receiving groove, and a first busbar is disposed in the second receiving groove. The second high-low voltage isolation plate is disposed on the second battery module and has a third receiving groove and a plurality of fourth receiving grooves. Along a third direction, the depth of the third receiving groove is different from the depth of the fourth receiving groove. A second circuit board is disposed in the third receiving groove, and a second busbar is disposed in the fourth receiving groove.

[0019] In one possible implementation, the battery device further includes a housing, a cover, a maintenance mechanism, and a main positive connector. The housing has a receiving cavity and an opening communicating with the receiving cavity, the receiving cavity accommodating a first battery module, a second battery module, a first circuit board, and a second circuit board. The cover, along a first direction, is located on the side of the first battery module opposite to the second battery module, the cover being connected to the housing and used to seal the opening. The maintenance mechanism is mounted on the cover, a portion of which is located within the receiving cavity and electrically connected to a fifth busbar, with another portion of the maintenance mechanism located outside the receiving cavity. The main positive connector is mounted on the cover, a portion of which is located within the receiving cavity and electrically connected to a first busbar, with another portion of the main positive connector located outside the receiving cavity. The main negative connector is mounted on the cover, a portion of which is located within the receiving cavity and electrically connected to a first busbar different from the one connected to the main positive connector, with another portion of the main negative connector located outside the receiving cavity.

[0020] In one possible implementation, along a third direction, a first circuit board is located between the housing and the first battery module, and a second circuit board is located between the housing and the second battery module. The battery device also includes a heat exchange plate disposed in the receiving cavity. Along a third direction, the heat exchange plate is located on the side of the first battery module opposite to the first circuit board and on the side of the second battery module opposite to the second circuit board. The heat exchange plate has a heat exchange channel for coolant flow. The heat exchange channel has a liquid inlet area, a heat exchange area, a liquid collection area, and a liquid outlet area connected in sequence. The liquid inlet area and the heat exchange area are arranged along a first direction, and the liquid inlet area and the liquid outlet area are arranged along a second direction. The heat exchange area and the liquid collection area are also arranged along a second direction.

[0021] In one possible implementation, the liquid inlet zone includes a liquid inlet, a first diverter block, and multiple second diverter blocks arranged along a second direction. The first diverter block is used to divert the coolant from the liquid inlet to the multiple second diverter blocks, and the multiple second diverter blocks are used to divert the coolant to the heat exchange zone. The heat exchange zone includes multiple heat exchange channels for circulating coolant. Each heat exchange channel includes a curved portion and a tail end arranged sequentially along a first direction. The multiple curved portions are arranged at intervals along the second direction, and the curved portions are arranged in a serpentine manner along the second direction. The tail ends extend along the second direction. The liquid collection zone includes multiple liquid collection channels arranged along the second direction and extending along the first direction. The liquid collection channels are used to receive coolant flowing out from the multiple tail ends. The liquid discharge zone includes a liquid outlet and a third diverter block. The third diverter block is used to divert the coolant flowing out from the multiple liquid collection channels to the liquid outlet, and the liquid outlet is used to discharge the coolant.

[0022] In one possible implementation, a bending flow divider is provided within the bending section, and the bending flow divider is configured to conform to the bending section so that two sub-flow channels are formed within the bending section. Along the second direction, the radial dimensions of the multiple sub-flow channels of the multiple bending sections gradually decrease.

[0023] Another technical solution adopted in this application is to provide an electrical device, which includes a battery device, the battery device being the aforementioned battery device, and the battery device being used to provide electrical energy.

[0024] The aforementioned battery device and power supply device have a first circuit board with a first terminal and a second circuit board with a second terminal. The first circuit board and the second circuit board can be coupled through the first terminal and the second terminal, without the need for additional wiring harness connection, which helps to reduce space occupation. Furthermore, the modular design makes installation and maintenance more convenient, and the internal layout of the battery device is more reasonable.

[0025] 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 contents and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a partial structural schematic diagram of a battery device according to one or more embodiments of this application;

[0028] Figure 2 for Figure 1 A structural diagram from another perspective;

[0029] Figure 3 for Figure 1 A schematic diagram of the structure of the first battery module and the second battery module in the battery device;

[0030] Figure 4 for Figure 3 Enlarged structural diagram of the first battery module in the middle;

[0031] Figure 5 for Figure 3 Enlarged schematic diagram of the structure of the second battery module;

[0032] Figure 6 This is a schematic diagram of the structure of a battery device according to one or more embodiments of this application;

[0033] Figure 7 for Figure 6 Enlarged schematic diagram of the middle cover structure;

[0034] Figure 8 This is a schematic diagram of the structure of a battery device according to one or more embodiments of this application;

[0035] Figure 9 This is a schematic diagram of a portion of the structure of a battery device according to one or more embodiments of this application;

[0036] Figure 10 This is a schematic diagram of the structure of a heat exchange plate according to one or more embodiments of this application.

[0037] Among them, 10 is a battery device; 101 is a first battery module; 1011 is a first battery; 102 is a second battery module; 1021 is a second battery; 1111 is a first busbar component; 1112 is a second busbar component; 1113 is a third busbar component; 1114 is a fourth busbar component; 1115 is a fifth busbar component; 201 is a first circuit board; 2011 is a first terminal; 2012 is a first line; 2013 is a second line; 202 is a second circuit board; 2021 is a second terminal; 2022 is a main body; 2023 is a connecting part; 2024 is a third line; 113 is a data acquisition circuit connector; 114 is a battery management module; 115 is a maintenance mechanism; 116 is a maintenance mechanism. 117. Main positive connector; 118. Main negative connector; 119. Fire detection element; 110. Explosion-proof valve; a. First direction; b. Second direction; c. Third direction; 12. Housing; 121. Opening; 122. Cover plate; 221. Fixing hole; 23. End plate; 222. Mounting hole; 30. Heat exchange plate; 31. Liquid inlet; 321. Liquid outlet; 33. Heat exchange channel; 331. Bending section; 3311. Bending diverter block; 332. Tail end; 34. First diverter block; 341. Diverter section; 342. Drainage section; 343. Second diverter block; 36. Liquid inlet area; 37. Heat exchange area; 35. Liquid collection area; 351. Liquid collection channel; 32. Liquid discharge area; 322. Third diverter block. Detailed Implementation

[0038] The embodiments of the technical solution of this application will be described in detail below. The following embodiments are only used to illustrate the technical solution of this application more clearly, and are therefore only examples, and should not be used to limit the scope of protection of this application.

[0039] 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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having” and any variations thereof in this application are intended to cover non-exclusive inclusion.

[0040] 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, unless otherwise explicitly specified, 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).

[0041] 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.

[0042] 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.

[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0044] The problem with battery devices in related technologies is that the internal layout of the battery device is unreasonable, making installation and maintenance inconvenient.

[0045] Based on these considerations, this application proposes a battery device and an electrical device.

[0046] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0047] Please see Figure 1 and Figure 2 , Figure 1 This is a partial structural schematic diagram of a battery device according to one or more embodiments of this application. Figure 2 for Figure 1A structural schematic diagram from another perspective. In some embodiments, the battery device 10 includes a first battery module 101, a second battery module 102, a first circuit board 201, and a second circuit board 202. The first battery module 101 includes a plurality of first batteries 1011, and the second battery module 102 includes a plurality of second batteries 1021. Along a first direction a, the second battery module 102 is located on one side of the first battery module 101. The first circuit board 201 is electrically connected to the plurality of first batteries 1011 and is used to collect signals from the first batteries 1011. Along the first direction a, the side of the first circuit board 201 facing the second battery module 102 is provided with a first terminal 2011. Along the opposite direction of the first direction a, the second circuit board 202 has a main body portion 2022 and a connecting portion 2023 arranged sequentially. The main body portion 2022 is electrically connected to the plurality of second batteries 1021 and is used to collect signals from the second batteries 1021. The connecting portion 2023 is provided with a second terminal 2021, which is connected to the first terminal 2011.

[0048] The first battery 1011 and the second battery 1021 are used for energy storage and release. The first battery module 101 is composed of multiple first batteries 1011 connected in series or parallel, and the second battery module 102 is composed of multiple second batteries 1021 connected in series or parallel. By forming modular first battery modules 101 and second battery modules 102, voltage and energy expansion can be achieved, and the individual first batteries 1011 and second batteries 1021 can be easily controlled and managed. Each individual first battery 1011 and second battery 1021 is connected in series or parallel through a busbar component integrated in the busbar assembly. The integrated busbar assembly also includes a first circuit board 201 and a second circuit board 202. The first circuit board 201 is used to collect signals from each first battery 1011 in the first battery module 101, such as temperature information, current information, and voltage information. The second circuit board 202 is used to collect signals from each second battery 1021 in the second battery module 102, such as temperature information, current information, and voltage information, so that each first battery 1011 and second battery 1021 can be adjusted based on the collected parameter information, thereby maintaining the stable operation of the battery device 10.

[0049] In this embodiment, the first circuit board 201 is provided with a first terminal 2011, and the second circuit board 202 is provided with a second terminal 2021. The coupling between the first circuit board 201 and the second circuit board 202 is achieved by connecting the first terminal 2011 and the second terminal 2021. This arrangement eliminates the need for additional wiring harnesses between the first circuit board 201 and the second circuit board 202, which helps reduce space occupation. Furthermore, the modular design makes installation and maintenance more convenient, resulting in a more reasonable internal layout of the battery device 10.

[0050] In some embodiments, the second terminal 2021 and the first terminal 2011 are configured to be plugged in, which is more conducive to the connection operation of the first circuit board 201 and the second circuit board 202, and further improves the ease of installation and maintenance.

[0051] As an example, the second terminal 2021 can be plugged into the first terminal 2011 to achieve the connection.

[0052] In other embodiments, the first terminal 2011 and the second terminal 2021 can also be fixed by a threaded structure, a snap-locking structure, a magnetic structure, etc., to achieve the connection between the two.

[0053] Please refer to the following: Figure 3 , Figure 4 and Figure 5 , Figure 3 for Figure 1 A schematic diagram of the structure of the first battery module and the second battery module in the battery device. Figure 4 for Figure 3 An enlarged schematic diagram of the structure of the first battery module. Figure 5 for Figure 3 An enlarged schematic diagram of the structure of the second battery module. In some embodiments, the first circuit board 201 is a flexible circuit board, which allows the portion of the first circuit board 201 with the first terminal 2011 to be bent, so as to facilitate the connection of the first terminal 2011 and the second terminal 2021, thereby facilitating installation and maintenance.

[0054] In some embodiments, the second circuit board 202 is a flexible circuit board, which allows the connecting portion 2023 with the second terminal 2021 to be bent, so as to facilitate the connection of the first terminal 2011 and the second terminal 2021, thereby facilitating installation and maintenance.

[0055] It is understood that in embodiments where the second terminal 2021 and the first terminal 2011 are configured to be plugged together, the first circuit board 201 is a flexible circuit board and / or the second circuit board 202 is a flexible circuit board. On the one hand, this facilitates the movement of the first terminal 2011 and / or the second terminal 2021, thereby improving the efficiency of the plugging operation of the first terminal 2011 and the second terminal 2021. On the other hand, it provides a margin for relative displacement for the plugging of the first terminal 2011 and the second terminal 2021, which helps to reduce the risk of unstable connection caused by rigid force when the first terminal 2011 and the second terminal 2021 are plugged together.

[0056] In other embodiments, the first circuit board 201 is a rigid circuit board, and the second circuit board 202 is a flexible circuit board. The first terminal 2011 formed on the first circuit board 201 is a recessed contact, and the second terminal 2021 formed on the second circuit board 202 is a raised contact, so that the second terminal 2021 can be inserted into the first terminal 2011, thereby connecting the first circuit board 201 and the second circuit board 202. When the first circuit board 201 is a rigid circuit board, it can provide support during the insertion of the second terminal 2021 into the first terminal 2011, which helps to improve the convenience of the insertion operation of the first terminal 2011 and the second terminal 2021.

[0057] In other embodiments, the first circuit board 201 is a flexible circuit board, and the second circuit board 202 is a rigid circuit board.

[0058] In some embodiments, the first circuit board 201 has a first line 2012 and a second line 2013, and the second circuit board 202 has a third line 2024. The second line 2013 is coupled to the first terminal 2011, and the third line 2024 is coupled to the second terminal 2021. This arrangement allows the first battery 1011 signal to be transmitted via the first line 2012 and the second battery 1021 signal to be transmitted via the second line 2013 on the first circuit board 201. This enables different signals to be transmitted through different lines, thereby reducing crosstalk between different signal transmissions and improving the accuracy of signal transmission.

[0059] In some embodiments, the battery device 10 further includes a battery management module 114 and a data acquisition circuit connector 113. Along the first direction a, the battery management module 114 is located on the side of the first battery module 101 opposite to the second battery module 102. The first line 2012 and the second line 2013 are connected to the battery management module 114 through the data acquisition circuit connector 113.

[0060] The battery management module 114 plays a monitoring and control role. It receives signals from the first circuit board 201 and the second circuit board 202, and adjusts the operating state of each first battery module 101 and second battery module 102 based on the received signals. For example, by using the collected temperature information, it can regulate the discharge level of each first battery 1011 and each second battery 1021, reducing the temperature difference between them. This reduces local overheating in the battery device 10, balances the aging rate of each battery 1011 and second battery 1021, optimizes the performance of the battery device 10, and extends its lifespan. The data acquisition circuit connector 113 couples the first circuit board 201 with the battery management module 114, enabling the transmission of parameter information.

[0061] In this embodiment, each first battery module 101 is located on the side opposite to the second battery module 102. There are two acquisition circuit connectors 113, so that the signal on the first line 2012 can be transmitted to the battery management module 114 through one acquisition circuit connector 113, and the signal on the second line 2013 can be transmitted to the battery management module 114 through the other acquisition circuit connector 113. The signals on the two different lines are transmitted to the battery management module through different acquisition circuit connectors 113, thereby reducing the problem of signal crosstalk.

[0062] In some embodiments, a plurality of first batteries 1011 and a plurality of second batteries 1021 are arranged along a first direction, and there are multiple first battery modules 101 and multiple second battery modules 102. The plurality of first battery modules 101 and the plurality of second battery modules 102 are arranged along a second direction. The first direction a and the second direction b are perpendicular. This arrangement stacks the first batteries 1011 and the second batteries 1021 along the first direction a, allowing the first circuit board 201 and the second circuit board 202 to extend along the first direction a with their ends spaced apart. This facilitates connecting the first terminal 2011 on the first circuit board 201 to the second terminal 2021 on the second circuit board 202, eliminating the need to bend the first terminal 2011 or the second terminal 2021 to achieve the connection, further improving installation and maintenance convenience.

[0063] In some embodiments, the battery device 10 includes a first busbar component 1111. The first circuit board 201 is provided with a plurality of first busbar components 1111 on both sides along the second direction b. The plurality of first busbar components 1111 on each side are arranged at intervals along the first direction a. Two adjacent first batteries 1011 are electrically connected through the first busbar component 1111.

[0064] The first busbar component 1111 is used to connect the first batteries 1011 arranged along the first direction a in series or in parallel. The first busbar component 1111 is a rigid conductor made of a high-conductivity metal, such as copper or aluminum. The first busbar component 1111 is electrically connected to the terminals of the first batteries 1011 by means of laser welding, bolt fastening, etc., thereby increasing the electrical connection area and reducing the impedance. Furthermore, because the first busbar component 1111 is electrically connected by means of bolt fastening, laser welding, etc., it has good vibration and impact resistance. In this embodiment, the first busbar component 1111 has a sheet-like structure, which has a larger surface area, resulting in a larger heat dissipation area and thus more even temperature distribution. In some other embodiments, the first busbar component 1111 may also have a rod-like structure. The first busbar component 1111 is arranged at intervals along the first direction a on both sides of the first circuit board 201, so that there is no intersection between the first busbar component 1111 and the first circuit board 201, and the first busbar component 1111 and the first circuit board 201 have a certain distance between them, which separates the current transmission on the two, and can realize the isolation between high voltage and low voltage, making the battery device 10 more reliable.

[0065] In some embodiments, the battery device 10 includes a second busbar component 1112. The second circuit board 202 is provided with a plurality of second busbar components 1112 on both sides along the second direction b. The plurality of second busbar components 1112 on each side are arranged at intervals along the first direction a. Two adjacent second batteries 1021 are electrically connected through the second busbar component 1112.

[0066] The second busbar 1112 is used to connect the second batteries 1011 arranged along the second direction b in series or parallel. The second busbar 1112 is a rigid conductor made of a high-conductivity metal, such as copper or aluminum. The second busbar 1112 is electrically connected to the terminals of the second battery 1021 by means of laser welding, bolt fastening, etc., resulting in a larger electrical connection area and lower impedance. Furthermore, since the second busbar 1111 is electrically connected by means of bolt fastening, laser welding, etc., it has good vibration and impact resistance. The second busbar 1112 is arranged at intervals along the first direction a on both sides of the second circuit board 202, so there is no intersection between the second busbar 1112 and the second circuit board 202, maintaining a certain distance between them. This separates the current transmission on both, achieving isolation between high and low voltage, and improving the reliability of the battery device 10.

[0067] In some embodiments, the battery device 10 includes a third busbar 1113, and in the first direction a, the adjacent first battery module 101 and the adjacent second battery module 102 are electrically connected through the third busbar 1113.

[0068] In some embodiments, the third busbar 1113 is a rigid conductor made of a highly conductive metal. The highly conductive metal can be copper, aluminum, or the like. The third busbar 1113 is electrically and fixedly connected to the terminals of the first battery 1011 and the second battery 1021 via laser welding, bolt fastening, or other methods. This fixed electrical connection between the third busbar 1113 and the terminals allows for a larger connection area, and because the third busbar 1113 is electrically and fixed via bolt fastening, laser welding, or other methods, it has better vibration and impact resistance.

[0069] In some embodiments, the battery device 10 includes a fourth busbar 1114 located on the side of the second battery module 102 away from the first battery module 101 along a first direction a, and the fourth busbar 1114 is electrically connected to two second batteries 1021 of two adjacent second battery modules 102 along a second direction b.

[0070] In some embodiments, the fourth busbar 1114 is a rigid conductor made of a highly conductive metal. The highly conductive metal can be copper, aluminum, or the like. The fourth busbar 1114 is electrically and fixedly connected to the terminal of the second battery 1021 via laser welding, bolt fastening, or other methods. This fixed electrical connection between the fourth busbar 1114 and the terminal allows for a larger connection area, and because the fourth busbar 1114 is electrically and fixed via bolt fastening, laser welding, or other methods, it has better vibration and impact resistance.

[0071] In some embodiments, the battery device 10 includes a fifth busbar 1115 located on the side of the first battery module 101 away from the second battery module 102 along a first direction a, and the fifth busbar 1115 is electrically connected to two first batteries 1011 of two adjacent first battery modules 101 along a second direction b.

[0072] In some embodiments, a plurality of first battery modules 101 and a plurality of second battery modules 102 are connected as a whole through a first busbar 1111, a second busbar 1112, a third busbar 1113, a fourth busbar 1114 and a fifth busbar 1115.

[0073] The first busbar component 1111, the second busbar component 1112, the third busbar component 1113, the fourth busbar component 1114, and the fifth busbar component 1115 have a larger connection area with the terminals on the first battery module 101 and the second battery module 102. The connection methods include bolt fastening and laser welding, which improves the resistance to vibration and impact and makes the battery device 10 more reliable.

[0074] In some embodiments, along the third direction c, the first circuit board 201 is located on one side of the first battery module 101, and the second circuit board 202 is located on one side of the second battery module 102. Along the third direction c, the first circuit board 201 is offset from the first busbar component 1111. The second circuit board 202 is offset from the second busbar component 1112. The third direction c is perpendicular to the first direction a and perpendicular to the second direction b.

[0075] Along the third direction c, the first circuit board 201 and the first busbar 1111 are offset, meaning the distance between the first circuit board 201 and the first battery module 101 is different from the distance between the first busbar 1111 and the first battery module 101. This arrangement places the first circuit board 201 and the first busbar 1111 on different planes, thereby increasing the spacing between them. It is easily understood that the isolation effect between high voltage and low voltage is related to the distance between their circuits; the greater the distance, the better the isolation effect. This arrangement increases the spacing between the first circuit board 201 and the first busbar 1111, further improving the isolation effect between high voltage and low voltage. Furthermore, in this embodiment, the distance between the first circuit board 201 and the first battery module 101 is smaller than the distance between the first busbar 1111 and the first battery module 101. In some other embodiments, the distance between the first circuit board 201 and the first battery module 101 can also be greater than the distance between the first busbar component 1111 and the first battery module 101.

[0076] In some embodiments, along the third direction c, the second circuit board 202 and the second busbar component 1112 are misaligned, so that the second circuit board 202 and the second busbar component 1112 are located on different planes, which increases the distance between the second circuit board 202 and the second battery module 102. The increased spacing distance can improve the isolation effect between the high voltage and low voltage of the two.

[0077] In some embodiments, the battery device 10 further includes a first high-low voltage isolation plate (not shown in the figure), which is disposed on the first battery module 101. The first high-low voltage isolation plate has a first receiving groove (not shown in the figure) and a plurality of second receiving grooves (not shown in the figure). Along the third direction c, the depth of the first receiving groove is different from the depth of the second receiving groove. The first circuit board 201 is disposed in the first receiving groove, and the first busbar component 1111 is disposed in the second receiving groove.

[0078] A first circuit board 201 is disposed in a first receiving groove, and a first busbar component 1111 is disposed in a second receiving groove, such that the first circuit board 201 and the first busbar component 1111 are separated by a first high-low voltage isolation plate. This first high-low voltage isolation plate provides physical isolation, further improving the high-low voltage isolation effect. Furthermore, the material used to manufacture the first high-low voltage isolation plate may include one or more of polyvinyl chloride, polypropylene, ceramic, and rubber. The first high-low voltage isolation plate also provides insulation protection and fixation, increasing the reliability and safety of the battery device 10 structure. In this embodiment, the first receiving groove and the second receiving groove are through grooves, allowing the first circuit board 201 in the first receiving groove to connect to the first battery 1011, and the first busbar component 1111 in the second receiving groove to connect to the first battery 1011.

[0079] In some embodiments, the battery device 10 further includes a second high-low voltage separator (not shown). The second high-low voltage separator is disposed on the second battery module 102. The second high-low voltage separator has a third receiving groove (not shown) and a plurality of fourth receiving grooves (not shown). Along a third direction c, the depth of the third receiving groove is different from the depth of the fourth receiving groove. The second circuit board 202 is disposed in the third receiving groove, and the second busbar component 1112 is disposed in the fourth receiving groove.

[0080] The second circuit board 202 is disposed in the third receiving slot, and the second busbar component 1112 is disposed in the fourth receiving slot, such that the second circuit board 202 and the second busbar component 1112 are separated by the second high-low voltage isolation plate, thereby enabling the second high-low voltage isolation plate to perform physical isolation and further improve the high-low voltage isolation effect. In addition, the material used to manufacture the second high-low voltage isolation plate may include one or more of polyvinyl chloride, polypropylene, ceramic, and rubber. The second high-low voltage isolation plate also serves as insulation protection and fixation, increasing the reliability and safety of the battery device 10 structure. In this embodiment, the third and fourth receiving slots are through slots, allowing the second circuit board 202 in the third receiving slot to connect to the second battery 1021, and the second busbar component 1112 in the fourth receiving slot to connect to the battery.

[0081] In some embodiments, the depth of the first receiving groove is greater than the depth of the second receiving groove. Specifically, the second receiving groove has a protrusion formed on the side of its wall near the bottom, making the depth of the first receiving groove greater than the depth of the second receiving groove. The first busbar component 1111 is disposed on the protrusion, so that the first busbar component 1111 and the first circuit board 201 are not on the same plane, thus improving the high-low voltage isolation effect. In some embodiments, the depth of the third receiving groove is greater than the depth of the fourth receiving groove, and the fourth receiving groove has a protrusion formed on the side of its wall near the bottom, so that the second busbar component 1112 and the second circuit board 202 are not on the same plane, thus improving the high-low voltage isolation effect.

[0082] In some embodiments, a first isolation barrier is formed on the first high-low voltage isolation plate. The first isolation barrier protrudes from the first high-low voltage isolation plate and is disposed in the area between the first receiving groove and the second receiving groove. A second isolation barrier is formed on the second high-low voltage isolation plate. The second isolation barrier protrudes from the second high-low voltage isolation plate and is disposed in the area between the third receiving groove and the fourth receiving groove. The first isolation barrier and the second isolation barrier can play a role in physical isolation, further improving the high-low voltage isolation.

[0083] Please refer to the following: Figure 1 , Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the structure of a battery device according to one or more embodiments of this application. Figure 7 for Figure 6 An enlarged structural diagram of the cover body. In some embodiments, the battery device 10 further includes a housing 12, a cover plate 122, a maintenance mechanism 115, a main positive connector 116, and a main negative connector 117. The housing 12 has a receiving cavity (not shown) and an opening 121 communicating with the receiving cavity. The receiving cavity accommodates a first battery module 101, a second battery module 102, a first circuit board 201, and a second circuit board 202. Along the first direction a, the cover plate 122 is located on the side of the first battery module 101 opposite to the second battery module 102. The cover plate 122 is connected to the housing 12 and is used to seal the opening 121. The maintenance mechanism 115 is mounted on the cover plate 122. A portion of the maintenance mechanism 115 is located in the receiving cavity and is electrically connected to the fifth busbar component 1115. A portion of the maintenance mechanism 115 is located outside the receiving cavity. A main positive connector 116 is mounted on the cover plate 122. A portion of the main positive connector 116 is located within the receiving cavity and is electrically connected to a first bus component 1111. A portion of the main positive connector 116 is located outside the receiving cavity. A main negative connector 117 is mounted on the cover plate 122. A portion of the main negative connector 117 is located within the receiving cavity and is electrically connected to a first bus component 1111, which is different from the one connected to the main positive connector 116. A portion of the main negative connector 117 is located outside the receiving cavity.

[0084] The housing 12 serves as a protective shield for the battery. In this embodiment, the housing 12 is a metal housing; in some other embodiments, the housing 12 may also be a plastic housing. The cover plate 122 is specifically sealed to the opening 121 using bolts, snap-fits, interference fits, or other methods. In this embodiment, the cover plate 122 is an integrated cover plate 122, allowing the maintenance mechanism 115, the main positive connector 116, and the main negative connector 117 to all be mounted on the cover plate 122. This eliminates the need for an additional maintenance panel or electrical mounting plate, simplifying the installation structure and facilitating installation and maintenance.

[0085] In some embodiments, a fire detection element 118 is also integrated on the cover plate 122. In other embodiments, an explosion-proof valve 119 is also integrated on the cover plate 122.

[0086] In addition, in this embodiment, the cover plate 122 has a fixing hole 221, and the maintenance mechanism 115 is installed on the fixing hole 221 of the cover plate 122. The maintenance mechanism 115 is connected in series with two adjacent first busbar components 1111 along the second direction b, so that the high voltage circuit between the two first busbar components 1111 can be cut off through the maintenance mechanism 115 to ensure safety during maintenance.

[0087] In some embodiments, the maintenance mechanism 115 is located in the middle region between two adjacent first battery modules 101 along the second direction b. The battery management module 114 and the maintenance mechanism are located in the same region of the first battery modules 101 in the opposite direction to the first direction a.

[0088] The maintenance mechanism 115 is located in the middle area between two adjacent first battery modules 101 in the second direction b. The maintenance mechanism 115 is coupled to the fifth bus component 1115. The battery management module 114 is coupled to each acquisition circuit connector 113 through a wire harness. By setting the battery management module 114 and the maintenance mechanism 115 in the same area in the opposite direction of the first direction a of the battery module, there is no crossover between the fifth bus component 1115 coupled to the maintenance mechanism 115 and the low-voltage wire harness between the acquisition circuit connector 113 and the battery management module 114, thereby further improving the effect of high and low voltage isolation.

[0089] Please refer to the following: Figure 1 and Figure 8 , Figure 8 This is a schematic diagram of the structure of a battery device according to one or more embodiments of the present application. In some embodiments, the first battery module 101 further includes an end plate 23, which is located on both end faces of the first battery module 101 facing away from the second battery module 102 and towards the second battery module 102. The end plate 23 facing away from the second battery module 102 is provided with at least two different types of mounting holes 222, and the battery management module 114 is mounted on the mounting holes 222.

[0090] Mounting holes 222 are used to mount and fix battery management modules 114. In this embodiment, there are two types of mounting holes 222 on the end plate 23 so that two different models of battery management modules 114 can be mounted on the end plate 23. In other embodiments, there may be three or four types of mounting holes 222 on the end plate 23.

[0091] Please refer to the following: Figure 1 , Figure 6 , Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of a portion of the structure of a battery device according to one or more embodiments of this application; Figure 10 This is a schematic diagram of the structure of a heat exchange plate according to one or more embodiments of this application. In some embodiments, along the third direction c, a first circuit board 201 is located between the housing 12 and the first battery module 101, and a second circuit board 202 is located between the housing 12 and the second battery module 102.

[0092] In some embodiments, the battery device 10 further includes a heat exchange plate 30 disposed in the receiving cavity along a third direction c. The heat exchange plate 30 is located on the side of the first battery module 101 opposite to the first circuit board 201 and on the side of the second battery module 102 opposite to the second circuit board 202.

[0093] The heat exchange plate 30 is used to exchange heat with the first battery module 101 and the second battery module 102. Specifically, the heat exchange plate 30 has a flowing coolant. Through the circulation of the coolant, the heat of the first battery module 101 and the second battery module 102 can be removed when the temperature of the battery device 10 is high, and the heat of the first battery module 101 and the second battery module 102 can be heated when the temperature of the battery device 10 is low, so as to maintain the stability of the temperature of the battery device 10.

[0094] In some embodiments, the heat exchange plate 30 is provided with a heat exchange channel for coolant flow. The heat exchange channel has a liquid inlet area 36, ​​a heat exchange area 37, a liquid collection area 35 and a liquid outlet area 32 connected in sequence. The liquid inlet area 36 and the heat exchange area 37 are arranged along a first direction a, the liquid inlet area 36 and the liquid outlet area 32 are arranged along a second direction b, and the heat exchange area 37 and the liquid collection area 35 are arranged along the second direction b.

[0095] The inlet area 36 is used to connect to an external coolant supply device. Coolant enters the heat exchange area 37 through the inlet area 36. During its flow in the heat exchange area 37, the coolant exchanges heat with the first battery module 101 and the second battery module 102. This allows the coolant to remove heat from the first battery module 101 and the second battery module 102 when the battery device 10 is at a high temperature, and to heat the first battery module 101 and the second battery module 102 when the battery device 10 is at a low temperature, thereby maintaining the stability of the battery device 10's temperature. After heat exchange, the coolant is collected in the collection area 35 and discharged from the drain area 32.

[0096] In some embodiments, the liquid inlet zone 36 is provided with a liquid inlet 31, a first diverter block 34 and a plurality of second diverter blocks 343 arranged along the second direction b. The first diverter block 34 is used to divert the coolant from the liquid inlet 31 to the plurality of second diverter blocks 343, and the plurality of second diverter blocks 343 are used to divert the coolant to the heat exchange zone 37.

[0097] In some embodiments, the heat exchange zone 37 includes a plurality of heat exchange channels 33 for circulating coolant. A first diverter block 34 and a second diverter block 343 are disposed corresponding to the inlet 31, and the first diverter block 34 and the second diverter block 343 are used to guide the coolant entering from the inlet 31 to different heat exchange channels 33. The plurality of heat exchange channels 33 are located in different regions of the heat exchange plate 30, so that after the coolant is diverted to the heat exchange zone 37 via the second diverter block 343, it flows in different regions of the heat exchange plate 30 at the same time, thereby improving the circulation efficiency of the coolant in the heat exchange plate 30 and allowing the coolant to flow fully in the heat exchange plate 30, thereby improving the heat exchange efficiency of the heat exchange plate 30.

[0098] In some specific embodiments, the first diverter block 34 includes a diverter section 341 and a guide section 342. The diverter section 341 is connected to the guide section 342. The diverter section 341 has a long strip structure or a plate-like structure and is located at the liquid inlet 31. The long strip structure or plate-like structure of the diverter section 341 is arranged parallel to the flow path of the coolant, so that the two streams of coolant can flow along the first direction a on both sides of the diverter section 341 respectively. The guide section 342 is connected to one end of the diverter section 341 along the first direction a and extends along the second direction b and the direction opposite to the second direction b, so that the two streams of coolant are guided by the guide section 342 to flow in the second direction b and the direction opposite to the second direction b respectively. Multiple second diverting blocks 343 are spaced apart along the second direction b on the first direction a of the flow guide 342, so that the two streams of coolant diverted from the first diverting block 34 are diverted again through the spaced flow guide 342 into different heat exchange channels 33, thereby enabling the coolant to flow fully in different areas of the heat exchange plate 30.

[0099] In some embodiments, the heat exchange channel 33 includes a curved portion 331 and a tail end portion 332 arranged sequentially along a first direction a. The multiple curved portions 331 are spaced apart along a second direction b, and are arranged in a serpentine curve along the second direction b. The tail end portion 332 extends along the second direction b. The liquid collection area 35 is provided with multiple liquid collection channels 351 arranged along the second direction b. The multiple liquid collection channels 351 extend along the first direction a and are used to receive coolant flowing out from the multiple tail end portions 332. The liquid discharge area 32 is provided with an outlet 321 and a third diverting block 322. The third diverting block 322 is used to divert the coolant flowing out from the multiple liquid collection channels 351 to the outlet 321, and the outlet 321 is used to discharge the coolant.

[0100] The bend 331 is arranged in a serpentine shape, which allows for a longer path within the heat exchange plate 30 and enables the bend 331 to be fully arranged within the heat exchange plate. The coolant flows along the serpentine bend 331, extending its flow time within the heat exchange plate 30 and increasing its flow path, thereby improving the heat exchange capacity of the coolant. Furthermore, the coolant flow along the serpentine bend 331 allows the coolant to cover high-heat areas, reducing heat exchange dead zones. The tail end 332 of each heat exchange channel 33 extends along the second direction b, connecting each heat exchange channel 33 to a collection area 35 in the second direction b. The collection area 35 serves to initially collect the coolant flowing from each heat exchange channel 33 into the collection channel 351.

[0101] In some embodiments, the radial dimension of the manifold channel 351 is larger than that of the heat exchange channel. When coolant from each heat exchange channel flows into the manifold channel 351 simultaneously, it reduces local congestion and balances the flow rate. Furthermore, it increases the flow path of the coolant as it flows into the manifold channel 351, reducing its velocity and thus the speed at which it exits from the outlet 321, thereby reducing coolant leakage at the interface. Additionally, in this embodiment, the manifold channel 351 extends along the first direction a and is an elongated channel. This allows the coolant flowing from each bend 331 to flow along the elongated channel, changing the flow pattern from turbulent to laminar, thus stabilizing the flow pattern as the coolant exits from the outlet 321.

[0102] In some embodiments, a bending diversion block 3311 is provided in the bending portion 331. The bending diversion block 3311 is configured to conform to the bending portion 331 so that two sub-channels are formed in the bending portion 331. Along the second direction b, the radial dimensions of the multiple sub-channels of the multiple bending portions 331 gradually decrease.

[0103] By forming two sub-channels within the bend 331, the coolant flows simultaneously through both sub-channels of the heat exchange channel 33. This arrangement increases the heat exchange area of ​​the coolant within the bend 331, thereby improving the heat exchange capacity of the coolant and enhancing the heat exchange effect of the heat exchange plate 30. Furthermore, the radial dimensions of the multiple sub-channels of the multiple bends 331 gradually decrease along the second direction b. Understandably, the distance between each bend 331 and the inlet 31 gradually increases along the second direction b, resulting in a lower flow velocity of the coolant reaching each bend 331. By gradually reducing the radial dimensions of the multiple sub-channels of each bend 331 along the second direction b, the coolant flow velocity within each sub-channel of each bend 331 can be made approximately the same, which helps to reduce the problems of eddies and collisions of the coolant flowing out of each bend 331 in the collection area 35.

[0104] Correspondingly, this application also proposes an electrical device that includes the battery device 10 of any of the above embodiments.

[0105] 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, The battery device includes: The first battery module includes multiple first batteries; The second battery module includes multiple second batteries, and along the first direction, the second battery module is located on one side of the first battery module; A first circuit board is electrically connected to the plurality of first batteries and is used to collect signals from the first batteries. Along the first direction, the side of the first circuit board facing the second battery module is provided with a first terminal. The second circuit board, in the opposite direction to the first direction, has a main body and a connecting part arranged sequentially. The main body is electrically connected to the plurality of second batteries and is used to collect signals from the second batteries. The connecting part is provided with a second terminal, which is connected to the first terminal.

2. The battery device according to claim 1, characterized in that, The first circuit board is a flexible circuit board; and / or, The second circuit board is a flexible circuit board; The second terminal is configured to be plugged into the first terminal.

3. The battery device according to claim 1, characterized in that, The first circuit board has a first line and a second line, and the second circuit board has a third line. The first line is used to collect the signal of the first battery, and the third line is used to collect the signal of the second battery. The second line is electrically connected to the first terminal, and the third line is electrically connected to the second terminal. The second line is used to transmit the signal of the second battery collected by the third line. The battery device also includes: A battery management module is located on the side of the first battery module away from the second battery module along the first direction. A data acquisition circuit connector is provided, through which the first line and the second line are electrically connected to the battery management module.

4. The battery device according to any one of claims 1 to 3, characterized in that, Multiple first batteries and multiple second batteries are arranged along the first direction, and there are multiple first battery modules and multiple second battery modules. Multiple first battery modules and multiple second battery modules are arranged along the second direction; the first direction and the second direction are perpendicular. The battery device satisfies at least one of the following conditions: (1) The battery device includes a first busbar component. The first circuit board is provided with multiple first busbar components on both sides along the second direction. The multiple first busbar components on each side are arranged at intervals along the first direction. Two adjacent first batteries are electrically connected through the first busbar component. (2) The battery device includes a second busbar component. The second circuit board is provided with multiple second busbar components on both sides along the second direction. The multiple second busbar components on each side are arranged at intervals along the first direction. Two adjacent second batteries are electrically connected through the second busbar component. (3) The battery device includes a third busbar component, and in the first direction, the adjacent first battery module and the adjacent second battery module are electrically connected through the third busbar component. (4) The battery device includes a fourth busbar component along the first direction. The fourth busbar component is located on the side of the second battery module away from the first battery module. The fourth busbar component is electrically connected to two second batteries of two adjacent second battery modules along the second direction. (5) The battery device includes a fifth busbar component along the first direction. The fifth busbar component is located on the side of the first battery module away from the second battery module. The fifth busbar component is electrically connected to the two first batteries of two adjacent first battery modules along the second direction.

5. The battery device according to claim 4, characterized in that, Along a third direction, the first circuit board is located on one side of the first battery module, and the second circuit board is located on one side of the second battery module; Along the third direction, the first circuit board and the first busbar are offset from each other; the second circuit board and the second busbar are offset from each other. Wherein, the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

6. The battery device according to claim 4, characterized in that, The battery device also includes: A first high- and low-voltage isolation plate is disposed on the first battery module. The first high- and low-voltage isolation plate has a first receiving groove and a plurality of second receiving grooves. Along the third direction, the depth of the first receiving groove and the depth of the second receiving groove are different. The first circuit board is disposed in the first receiving groove, and the first busbar is disposed in the second receiving groove. The second high-low voltage isolation plate is disposed on the second battery module. The second high-low voltage isolation plate has a third receiving groove and a plurality of fourth receiving grooves. Along the third direction, the depth of the third receiving groove is different from the depth of the fourth receiving groove. The second circuit board is disposed in the third receiving groove, and the second busbar component is disposed in the fourth receiving groove.

7. The battery device according to claim 4, characterized in that, The battery device also includes: The housing has a receiving cavity and an opening communicating with the receiving cavity, the receiving cavity accommodating the first battery module, the second battery module, the first circuit board and the second circuit board; A cover plate, along the first direction, is located on the side of the first battery module opposite to the second battery module, and the cover plate is connected to the housing and is used to seal the opening; A maintenance mechanism is installed on the cover plate, with a portion of the maintenance mechanism located in the receiving cavity and electrically connected to the fifth busbar component, and a portion of the maintenance mechanism located outside the receiving cavity; A main positive connector is mounted on the cover plate, with a portion of the main positive connector located in the receiving cavity and electrically connected to a first busbar component, and a portion of the main positive connector located outside the receiving cavity; A main negative connector is mounted on the cover plate, a portion of which is located in the receiving cavity and electrically connected to a first busbar component that is different from the main positive connector, a portion of which is located outside the receiving cavity.

8. The battery device according to claim 7, characterized in that, Along a third direction, the first circuit board is located between the housing and the first battery module, and the second circuit board is located between the housing and the second battery module; The battery device further includes a heat exchange plate disposed in the receiving cavity. Along the third direction, the heat exchange plate is located on the side of the first battery module away from the first circuit board and on the side of the second battery module away from the second circuit board. The heat exchange plate is provided with a heat exchange channel for coolant flow. The heat exchange channel has a liquid inlet area, a heat exchange area, a liquid collection area and a liquid outlet area connected in sequence. The liquid inlet area and the heat exchange area are arranged along the first direction, the liquid inlet area and the liquid outlet area are arranged along the second direction, and the heat exchange area and the liquid collection area are arranged along the second direction.

9. The battery device according to claim 8, characterized in that, The liquid inlet area is provided with a liquid inlet, a first diverting block, and a plurality of second diverting blocks arranged along the second direction. The first diverting block is used to divert the coolant from the liquid inlet to the plurality of second diverting blocks, and the plurality of second diverting blocks are used to divert the coolant to the heat exchange area. The heat exchange zone includes multiple heat exchange channels for circulating the coolant. Each heat exchange channel includes a curved portion and a tail end portion arranged sequentially along the first direction. The multiple curved portions are arranged at intervals along the second direction. The curved portions are arranged in a serpentine manner along the second direction. The tail end portion extends along the second direction. The liquid collection area is provided with a plurality of liquid collection channels arranged along the second direction, the plurality of liquid collection channels extending along the first direction, and the liquid collection channels are used to receive the coolant flowing out from the plurality of tail ends; The drainage area is provided with an outlet and a third diversion block. The third diversion block is used to divert the coolant flowing out from the plurality of liquid collection channels to the outlet, and the outlet is used to discharge the coolant.

10. The battery device according to claim 9, characterized in that, The curved section is provided with a curved flow divider block, which is configured to conform to the shape of the curved section so that two sub-flow channels are formed in the curved section. Along the second direction, the radial dimensions of the multiple sub-flow channels of the multiple curved sections gradually decrease.

11. An electrical appliance, characterized in that, The electrical device includes the battery device according to any one of claims 1-10.

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