Battery pack, chassis, electric device, and charging control method for electric device

Abstract

A battery pack (100) of an electric device (1000). The battery pack (100) is provided with a charging interface (4), and the battery pack (100) further comprises a housing (1) and a battery group (2). The battery group (2) is disposed within the housing (1), the charging interface (4) is electrically connected to the battery group (2) so as to charge the battery pack (100) by means of the charging interface (4), and the charging interface (4) is suitable for being directly electrically connected to an external charging device.

Description

Battery pack, chassis, electric equipment, and charging control methods for electric equipment

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202311491004X, filed on November 8, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of batteries, and in particular to a battery pack, chassis, electric device, and charging control method for the electric device. Background Technology

[0004] With the increasing popularity of new energy vehicles, the demand for fast charging of these vehicles is growing. In related technologies, the on-board charging interface of new energy vehicles is generally located at the rear of the vehicle, while the battery pack is located in the middle of the chassis. However, existing battery pack structures suffer from excessive heat generation during charging and low charging efficiency.

[0005] Application content

[0006] This application aims to at least partially address one of the technical problems in the related art.

[0007] Therefore, one objective of this application is to provide a battery pack for an electric device that has a short charging current path, which can reduce energy waste caused by power transmission impedance, and has high charging efficiency, which helps to reduce charging time.

[0008] According to an embodiment of the present application, the battery pack of the electric device is provided with a charging interface, and the battery pack further includes: a housing; a battery pack disposed within the housing, the charging interface being electrically connected to the battery pack to charge the battery pack through the charging interface; the charging interface is adapted to be directly electrically connected to an external charging device.

[0009] The battery pack of the electric device according to the embodiments of this application, by providing a charging interface on the battery pack, allows external charging devices to directly charge the battery pack through the charging interface. This helps to shorten the charging current path, reduce energy waste caused by power transmission impedance, and improve charging efficiency. In particular, the embodiments of this application improve the efficiency of DC charging of the battery pack with high current and greatly reduce heat generation during high-current charging. This simultaneously improves the efficiency and safety of high-current fast charging of the battery pack. The significant reduction in heat generation and direct electrical connection with external devices effectively increase the current-conducting area for charging, thereby enabling faster charging with higher currents and reducing charging time.

[0010] According to some embodiments of the present application, the charging interface of the battery pack of the electric device is located at the bottom or side of the housing.

[0011] According to some embodiments of the present application, the battery pack of the electric device includes a charging interface comprising at least two contact metal plates; and / or the charging interface includes a plug-in interface.

[0012] According to some embodiments of the present application, the battery pack of an electric device includes a charging interface comprising at least two contact metal pieces, and the external charging device includes a charging metal piece, wherein the area of ​​each contact metal piece is adapted to be larger than the area of ​​the charging metal piece.

[0013] According to some embodiments of the electric device battery pack of this application, the total area of ​​the contact metal sheets of the same polarity is ≥3000 mm². 2 .

[0014] According to some embodiments of the present application, the contact metal sheet of the battery pack of the electric device is adapted to be arranged at an angle to the charging metal sheet.

[0015] The battery pack of the electric device according to some embodiments of this application further includes a charging control module, which includes a main controller, a positive switch and a negative switch. The main controller is used to receive charging commands and is electrically connected to the positive switch and the negative switch respectively to control their opening and closing. The charging interface is electrically connected to the battery pack through the positive switch and the negative switch.

[0016] According to some embodiments of the present application, the charging interface of the battery pack of the electric device is exposed in the charging control module.

[0017] According to some embodiments of the present application, in the battery pack of an electric device, the charging interface is electrically connected to the input terminal of the positive switch via a metal conductive plate, and / or the charging interface is electrically connected to the input terminal of the negative switch via a metal conductive plate.

[0018] According to some embodiments of the present application, the battery pack of the electric device includes a plurality of cells electrically connected to a busbar component; the output terminal of the positive switch is directly electrically connected to the busbar component, and / or the output terminal of the negative switch is directly electrically connected to the busbar component.

[0019] The battery pack of the electric device according to some embodiments of this application further includes a communication module, which interacts with an external device to receive charging commands, and the communication module is communicatively connected to the main controller.

[0020] The battery pack of the electric device according to some embodiments of this application further includes a heat exchange component for heat exchange with the battery pack.

[0021] According to some embodiments of the present application, in the battery pack of an electric device, a portion of the heat exchange assembly extends to the charging control module for heat exchange with the charging control module.

[0022] The battery pack of the electric device according to some embodiments of this application further includes a buffer member disposed between the bottom wall of the housing and the battery pack.

[0023] According to some embodiments of the present application, the battery pack of an electric device has a housing provided with an opening for avoiding the charging interface.

[0024] The battery pack of the electric device according to some embodiments of this application further includes an opening / closing assembly for opening or closing the opening, the opening / closing assembly being disposed in the housing.

[0025] According to some embodiments of the present application, the opening and closing assembly of the battery pack of the electric device includes a moving member and a driving member. The moving member is movably disposed on the housing to open or close the opening, and the driving member is connected to the moving member to drive the moving member to move.

[0026] According to some embodiments of the present application, the battery pack of an electric device includes a driving member comprising: a motor; a rotating member connected to the motor for being driven to rotate by the motor; and a conversion member connected to both the rotating member and the moving member, the conversion member being used to convert the rotation of the rotating member into the movement of the moving member.

[0027] According to some embodiments of the present application, the battery pack of an electric device has a housing provided with a guide groove for guiding the movement direction of the moving member, and the moving member moves in cooperation with the guide groove.

[0028] The battery pack of the electric device according to some embodiments of this application further includes a charging control module, which is electrically connected to the charging interface and the battery pack respectively. The charging control module is configured to control the charging interface and the battery pack to conduct when a charging command is received. The charging control module is electrically connected to the opening and closing component, which is configured to control the opening and closing component to open the opening when the charging command is received.

[0029] According to some embodiments of the present application, the charging interface of the battery pack of the electric device is exposed outside the battery pack, and the electric device is provided with a clearance to avoid the charging interface.

[0030] This application also proposes a vehicle chassis.

[0031] The chassis of a vehicle according to an embodiment of this application includes a battery pack of an electric device according to any of the above embodiments.

[0032] According to the vehicle chassis of the present application embodiment, by providing a charging interface on the battery pack, an external charging device can directly charge the battery pack through the charging interface, which helps to shorten the charging flow path, reduce the energy waste caused by power transmission impedance, improve charging efficiency, reduce charging time, and improve the overall performance of the chassis.

[0033] According to some embodiments of the present application, the chassis of a vehicle has the housing configured as part of the vehicle's floor.

[0034] This application also proposes an electric device.

[0035] The electric device according to the embodiments of this application includes a battery pack of the electric device according to any of the above embodiments or a chassis of a vehicle according to any of the above embodiments, wherein the vehicle is charged directly through a charging interface.

[0036] According to the embodiments of this application, the electric device has a charging interface on the battery pack, which allows the charging device to directly charge the battery pack through the charging interface. This helps to shorten the charging path, reduce energy waste caused by power transmission impedance, improve charging efficiency, reduce charging time, and enhance user satisfaction.

[0037] This application also proposes a charging control method for electric devices.

[0038] According to the charging control method for an electric device according to an embodiment of this application, the electric device includes a battery pack according to any of the above embodiments, and the control method includes: receiving a charging command; and responding to the charging command, controlling the charging interface and the battery pack to be turned on to charge the battery pack.

[0039] According to the charging control method for electric devices in the embodiments of this application, by setting the charging interface to be electrically connected to the battery pack after receiving a charging command, the battery pack can be prevented from being electrically connected to an external charging device when it is not charging, which helps to improve the safety of the battery pack.

[0040] According to some embodiments of the present application, the charging control method for an electric device further includes, before controlling the charging interface and the battery pack to be connected, issuing a prompt message if the charging interface and the external charging device are not connected.

[0041] According to some embodiments of the charging control method for electric devices in this application, when the pressure on the charging interface is less than a set threshold, it is determined that the charging interface and the external charging device are not connected; and / or when the mechanical electronic switch is not closed, it is determined that the charging interface and the external charging device are not connected, wherein the mechanical electronic switch is located adjacent to the charging interface.

[0042] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0043] Figure 1 is a schematic diagram of a battery pack according to an embodiment of this application;

[0044] Figure 2 is an exploded view of a battery pack according to an embodiment of this application;

[0045] Figure 3 is a schematic diagram of a battery pack according to an embodiment of this application;

[0046] Figure 4 is a bottom view of a battery pack according to an embodiment of this application;

[0047] Figure 5 is a bottom view of a battery pack according to another embodiment of this application;

[0048] Figure 6 is a schematic diagram of a charging control module according to an embodiment of this application;

[0049] Figure 7 is a schematic diagram of the installation of the heat exchange assembly and the charging control module according to an embodiment of this application;

[0050] Figure 8 is a schematic diagram of the opening / closing component in the open position according to an embodiment of this application;

[0051] Figure 9 is a schematic diagram of the opening / closing component in the closed position according to an embodiment of this application;

[0052] Figure 10 is a schematic diagram of a chassis according to an embodiment of this application;

[0053] Figure 11 is a schematic diagram of an electric device according to an embodiment of this application;

[0054] Figure 12 is a flowchart of the charging control method according to an embodiment of this application;

[0055] Figure 13 is a flowchart of the charging control method according to an embodiment of the present application.

[0056] Reference numerals: Electric device 1000, Battery pack 100, Chassis 200, Housing 1, Opening 11, Guide groove 12, Battery group 2, Cell 21, Busbar component 22, Communication module 3, Charging interface 4, Contact metal piece 41, Positive contact metal piece 411, Negative contact metal piece 412, Grounding contact metal piece 413, Plug interface 42, Charging control module 5, Positive switch 51, Negative switch 52, Heat exchange component 6, Extension 61, Buffer 7, Opening and closing component 8, Moving part 81, Driving part 82, Motor 821, Rotating part 822, Converter 823, High voltage interface 91, Low voltage interface 92. Detailed Implementation

[0057] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0058] Hereinafter, with reference to the accompanying drawings, a battery pack 100 of an electric device according to an embodiment of the present application will be described.

[0059] As shown in Figures 1-11, the battery pack 100 of the electric device according to an embodiment of this application is provided with a charging interface 4. The battery pack 100 also includes a housing 1 and a battery pack 2. The battery pack 2 is disposed inside the housing 1, and the charging interface 4 is electrically connected to the battery pack 2 to charge the battery pack 100 through the charging interface 4. The charging interface 4 is adapted to be directly electrically connected to an external charging device. It should be noted that, in the embodiments of this application, the charging interface 4 is adapted to be directly electrically connected to an external charging device, which means that the charging interface 4 can be directly electrically connected to an external charging device so that the vehicle in which the battery pack 100 is located can be charged. The charging device refers to any device outside the vehicle used to charge the vehicle.

[0060] This helps to shorten the charging path, reduce energy waste caused by power transmission impedance, and improve charging efficiency while reducing charging time.

[0061] For example, referring to Figures 1-4, the battery pack 100 is provided with a charging interface 4, which is open to the outside of the battery pack and is suitable for direct electrical connection to an external charging device (such as a charging pile). The battery pack 100 also includes a housing 1 and a battery pack 2. The housing 1 is constructed in a rectangular box shape, and a receiving cavity is formed inside the housing 1, in which the battery pack 2 is disposed. The battery pack 2 is provided with a busbar component 22, which includes multiple battery cells 21. The multiple battery cells 21 are stacked and all are electrically connected to the busbar component 22. The busbar component 22 can be electrically connected to the charging interface 4, so that the charging interface 4 can be electrically connected to the multiple battery cells 21 through the busbar component 22, so that an external charging device can DC charge the battery pack 2 through the charging interface 4 and the busbar component 22.

[0062] Understandably, by directly providing the charging connector 4 on the battery pack, allowing external charging devices to directly charge the battery pack 100 via the connector 4, the charging path can be shortened, reducing power transmission impedance and improving charging efficiency. Furthermore, the shortened charging path allows for a reduction in the diameter of the charging cable harness of the external charging device, thereby reducing the overall weight of the charging gun, facilitating user operation, preventing mechanical damage to the charging connector 4, and reducing heat generation during DC fast charging, eliminating the need for additional heat dissipation structures.

[0063] According to the embodiment of this application, the battery pack 100 of the electric device has a charging interface 4, which allows an external charging device to directly charge the battery pack 100 through the charging interface 4. This helps to shorten the charging path, reduce the energy waste caused by power transmission impedance, and improve charging efficiency and reduce charging time.

[0064] In some embodiments of this application, as shown in FIG4, the charging interface 4 can be located at the bottom of the housing 1; or, the charging interface 4 can be located on the side of the housing 1, such as at the rear side of the housing 1. These arrangements facilitate the electrical connection and cooperation between external charging devices and the charging interface 4, improving the design rationality of the battery pack 100.

[0065] In some embodiments of this application, the charging interface 4 includes at least two contact metal pieces 41; and / or the charging interface 4 includes a plug interface 42. For example, referring to FIG4, the charging interface 4 may be provided with at least two contact metal pieces 41, which include a positive contact metal piece 411 and a negative contact metal piece 412. The positive contact metal piece 411 and the negative contact metal piece 412 are used for electrical connection with an external charging device, so that the external charging device can charge the battery pack 100 through the contact metal pieces 41. In addition, multiple contact metal pieces 41 may also include at least one ground contact metal piece 413, which is used for low-voltage conduction with the external charging device, and with the insulation detection device of the external charging device or electric device 1000, personal safety during the charging process is ensured. It should be noted that the contact metal pieces 41 may be copper busbars plated with nickel or silver.

[0066] By directly contacting the charging interface with the metal contact plate 41, a larger charging current can be passed through, and heat dissipation at the charging contact point is also facilitated. This is especially important during high-current DC charging, where the heat dissipation performance of the charging interface 4 is even more critical. Therefore, by using the metal contact plate 41 on the battery pack to directly contact the external charging equipment, the heat generation and current limitations caused by external circuitry can be reduced, while also meeting the heat dissipation requirements for high-current charging.

[0067] Alternatively, as shown in Figure 5, the charging interface 4 can be configured to include a plug interface 42. The plug interface 42 can be configured as a single-gun, dual-gun, or European standard device, etc., to facilitate compatibility with all external charging devices. This configuration helps meet diverse usage needs.

[0068] It should be noted that the location of the grounding contact metal piece 413 is not limited to between the positive contact metal piece 411 and the negative contact metal piece 412, but can also be located at other positions on the charging interface 4. This facilitates meeting the requirements for electrical clearance, creepage distance, and withstand voltage testing in high-voltage safety applications.

[0069] In some embodiments of this application, the charging interface 4 includes at least two contact metal pieces 41, and the external charging device includes a charging metal piece, wherein the area of ​​each contact metal piece 41 is adapted to be larger than the area of ​​the charging metal piece.

[0070] For example, referring to Figure 4, the charging interface 4 can be configured with at least two contact metal pieces 41, including a positive contact metal piece 411 and a negative contact metal piece 412. An external charging device includes two charging metal pieces, which are respectively connected to the positive contact metal piece 411 and the negative contact metal piece 412, allowing the external charging device to charge the battery pack through the contact metal pieces 41. The area of ​​each contact metal piece 41 can be appropriately larger than the area of ​​the charging metal piece, making it easier for the charging metal piece to connect with the contact metal piece 41 and ensuring sufficient conductive area between them. This improves the reliability of the battery pack 100. It should be noted that the relative position of the grounding contact metal piece 413 to the positive contact metal piece 411 and the negative contact metal piece 412 is not limited.

[0071] In some embodiments of this application, the total area of ​​contact metal sheets 41 of the same polarity can be ≥3000 mm². 2 Specifically, when there is only one contact metal piece 41 of the same polarity, such as a positive contact metal piece 411, the area of ​​the positive contact metal piece 411 shall be greater than or equal to 3000 mm². 2 When there are multiple contact metal pieces 41 of the same polarity, such as multiple positive contact metal pieces 411, the total area of ​​the multiple positive contact metal pieces 411 shall be greater than or equal to 3000 mm². 2 .

[0072] Through the above settings, sufficient conductive area can be ensured between the contact metal sheet 41 and the external charging device to meet the overcurrent requirements of the battery pack 100, and the heat generated by the contact metal sheet 41 during charging can be reduced, improving the design rationality of the battery pack 100. For example, the size of the contact metal sheet 41 can be set to 60mm*60mm or more to meet the overcurrent capacity requirements of the battery pack 100. Optionally, the thickness of the contact metal sheet 41 is 1.5mm to 5mm, preferably 2.5mm, 3mm, 3.5mm or 4mm. This thickness can ensure the firmness and strength of the contact metal sheet 41, prevent deformation of the metal sheet 41, and prevent the battery pack 100 from being too thick due to excessive thickness of the metal sheet 41.

[0073] In some embodiments of this application, the contact metal sheet 41 is adapted to be angled to the charging metal sheet, such as setting the extension direction of the contact metal sheet 41 to form a 90° angle with the extension direction of the charging metal sheet on the horizontal plane. This arrangement reduces the difficulty of aligning the contact metal sheet 41 and the charging metal sheet, improving the convenience of the charging alignment operation. For example, if the extension direction of the contact metal sheet 41 is the width direction of the battery pack 100, and the extension direction of the charging metal sheet is the length direction of the battery pack 100, the contact metal sheet 41 and the charging metal sheet form a cross angle to create a charging bow structure. This allows for a certain margin of error during charging alignment of the contact metal sheet 41 and the charging metal sheet, improving the accuracy of the alignment.

[0074] In some embodiments of this application, the battery pack 100 of the electric device further includes a charging control module 5. The charging control module 5 includes a main controller, a positive switch 51, and a negative switch 52. The main controller is used to receive charging commands and is electrically connected to the positive switch 51 and the negative switch 52 to control their opening and closing. The charging interface 4 is electrically connected to the battery pack 2 through the positive switch 51 and the negative switch 52. Preferably, both the positive switch 51 and the negative switch 52 are DC contactors.

[0075] For example, referring to Figures 1-3, the battery pack 100 also includes a charging control module 5, which is located within the receiving cavity. The charging control module 5 includes a main controller, a positive switch 51, and a negative switch 52. The main controller is used to receive charging commands, which can be manually sent by the customer via a button on the dashboard or a mobile device, or can be automatically generated after sensing an external charging device. This application does not limit this. The main controller is electrically connected to the positive switch 51 and the negative switch 52 respectively, so that the main controller can control the opening and closing of the positive switch 51 and the negative switch 52. The charging interface 4 is electrically connected to the positive switch 51 and the negative switch 52, and the positive switch 51 and the negative switch 52 are used to selectively connect to the busbar component 22.

[0076] Specifically, when the main controller receives a charging command, it can close the positive switch 51 and the negative switch 52 to electrically connect the charging interface 4 to the busbar component 22, allowing the charging interface 4 to charge the battery pack 2 through the busbar component 22. When charging is complete or the battery pack 100 overheats, the main controller can open the positive switch 51 and the negative switch 52 to stop charging the battery pack 2. This allows for better control of the charging process of the battery pack 100 and improves its reliability.

[0077] In some embodiments of this application, the charging interface 4 is exposed outside the charging control module 5. For example, referring to FIG6, the charging interface 4 can be integrated into the charging control module 5 and electrically connected to the positive switch 51 and the negative switch 52, with a portion of the charging interface 4 exposed outside the charging control module 5, so that the charging interface 4 can be electrically connected to an external charging device. This improves the integration of the battery pack 100 and facilitates layout.

[0078] In some embodiments of this application, the charging interface 4 can be electrically connected to the input terminal of the positive switch 51 via a metal conductive piece, and / or, the charging interface 4 can be electrically connected to the input terminal of the negative switch 52 via a metal conductive piece. It should be noted that the metal conductive piece can be constructed as a copper busbar. The current-carrying cross-section of a copper busbar is generally larger than that of a wire harness, making it easier for DC fast charging, and copper busbars facilitate reliable electrical connections. Through the above arrangements, the relative positions of the charging interface 4 with the positive and negative switches 51 can be flexibly arranged, which helps reduce the layout difficulty of the battery pack 100 and improves the practicality of the battery pack 100.

[0079] In some embodiments of this application, the battery pack 2 includes multiple battery cells 21, which are stacked and all electrically connected to the busbar component 22. The output terminal of the positive switch 51 can be directly electrically connected to the busbar component 22, and / or the output terminal of the negative switch 52 can be directly electrically connected to the busbar component 22. These configurations simplify the structure of the battery pack 100, reduce its processing difficulty and cost, and shorten the charging path length within the battery pack 100 to minimize heat generation and facilitate faster charging with higher current.

[0080] In some embodiments of this application, the battery pack 100 further includes a communication module 3. The communication module 3 interacts with external devices to receive charging commands. The communication module 3 is communicatively connected to a main controller and transmits the received charging commands to the main controller, enabling the main controller to control the positive switch 51 and the negative switch 52 according to the charging commands. Specifically, the external device can be a button on a dashboard, a mobile device, or an external charging device; this application does not limit this. This improves the reliability of the battery pack 100.

[0081] In some embodiments of this application, the battery pack 100 of the electric device further includes a heat exchange component 6 for heat exchange with the battery pack 2. For example, referring to FIG2, the battery pack 100 further includes the heat exchange component 6, which is installed in the receiving cavity of the housing 1 and attached to the side wall of the battery pack 2. For example, the heat exchange component 6 can be attached to the lower side wall of the battery pack 2, so that the heat exchange component 6 can exchange heat with the battery pack 2. With the above arrangement, the battery pack 2 can be prevented from overheating during charging, thus improving the safety of the battery pack 100.

[0082] Specifically, the heat exchange assembly 6 can be configured to include a heat exchange tube, which has an inlet and an outlet, both of which are connected to an external pipeline. The heat exchange medium can flow into the heat exchange tube from the inlet and out through the outlet. The heat exchange medium is used to exchange heat with the battery pack 2. Alternatively, the heat exchange assembly 6 can be configured to include a heat exchange section, which is made of a phase change heat exchange medium. The heat exchange section is used to exchange heat with the battery pack 2.

[0083] In some embodiments of this application, a portion of the heat exchange assembly 6 extends to the charging control module 5 for heat exchange with it. For example, referring to Figures 2 and 7, the charging control module 5 can be disposed on the outside of the battery pack 2, and the heat exchange assembly 6 can be mounted on the lower side of the battery pack 2 to fit against the lower sidewall of the battery pack 2. The heat exchange assembly 6 has an extension 61 that extends upward to the charging control module 5 and fits against the sidewall of the charging control module 5, allowing the heat exchange assembly 6 to exchange heat with the charging control module 5. This reduces the operating temperature of the charging control module 5, which helps improve the reliability of the battery pack 100.

[0084] In some embodiments of this application, the battery pack 100 of the electric device further includes a buffer 7. The buffer 7 is made of elastic insulating materials such as rubber and foam. The buffer 7 is sandwiched between the bottom wall of the housing 1 and the battery pack 2. The buffer 7 can support the battery pack 2 to improve the installation stability of the battery pack 2, and the buffer 7 can also buffer when the housing 1 is subjected to impact to protect the battery pack 2. Thus, the reliability of the battery pack 100 is improved.

[0085] It should be noted that when the heat exchange component 6 is located at the bottom of the battery pack 2, the buffer 7 can separate the heat exchange component 6 from the bottom of the housing 1 to protect the heat exchange component 6. This improves the reliability of the battery pack 100.

[0086] In some embodiments of this application, the housing 1 is provided with an opening 11 to avoid the charging interface 4. For example, referring to FIG1, the charging interface 4 is disposed in the receiving cavity and located outside the battery pack 2, and the housing 1 is provided with an opening 11 to avoid the charging interface 4, so that an external charging device can be electrically connected to the charging interface 4 through the opening 11.

[0087] The above-mentioned design allows the housing 1 to shield and protect the charging interface 4, thereby reducing the probability of damage to the charging interface 4 or contact with other components and improving the reliability of the battery pack 100.

[0088] In some embodiments of this application, referring to FIG1, the battery pack 100 of the electric device of this application embodiment further includes an opening and closing component 8. The opening and closing component 8 is located on the side of the housing 1 where the opening 11 is provided, and the opening and closing component 8 is used to open or close the opening 11. Specifically, as shown in FIG9, when the battery pack 100 needs to be charged, the opening and closing component 8 can be switched to the open position to open the opening 11, thereby exposing the charging interface 4, so that the charging gun of the external charging device can be electrically connected to the charging interface 4; as shown in FIG8, when the battery pack 100 is charging and the charging gun is disconnected from the charging interface 4, the opening and closing component 8 can be switched to the closed position to close the opening 11, thereby sealing the charging interface 4 inside the housing 1 to prevent the charging interface 4 from contacting other components. Thus, the reliability of the battery pack 100 can be improved.

[0089] In some embodiments of this application, the opening / closing assembly 8 includes a movable member 81 and a driving member 82. The movable member 81 is movably disposed on the housing 1 to open or close the opening 11, and the driving member 82 is connected to the movable member 81 to drive the movable member 81 to move. For example, referring to Figures 2, 8, and 9, the opening / closing assembly 8 includes a movable member 81 and a driving member 82. The movable member 81 is movably mounted on the side of the housing 1 where the opening 11 is located. The driving member 82 is connected to the movable member 81 and is used to drive the movable member 81 to the closed position to close the opening 11, and also to drive the movable member 81 to the open position to open the opening 11. This configuration improves the stability of the opening 11 when switching between different states.

[0090] In some embodiments of this application, the driving member 82 includes a motor 821, a rotating member 822, and a conversion member 823. The rotating member 822 is connected to the motor 821 so that it is driven to rotate by the motor 821. The conversion member 823 is connected to the rotating member 822 and the moving member 81 respectively, and the conversion member 823 is used to convert the rotation of the rotating member 822 into the movement of the moving member 81.

[0091] For example, referring to Figures 8-9, the driving member 82 includes a motor 821, a rotating member 822, and a conversion member 823. The moving member 81 is movably mounted on the housing 1. The motor 821 is located on one side of the moving member 81 along the moving direction. The rotating member 822 is columnar in shape and extends along the moving direction and is connected to the output end of the motor 821 so that the motor 821 can drive the rotating member 822 to rotate. The conversion member 823 is fixed on the moving member 81 and connected to the rotating member 822. The conversion member 823 is used to convert the rotation of the rotating member 822 into the movement of the moving member 81 so that the motor 821 can drive the moving member 81 to move through the rotating member 822 and the conversion member 823.

[0092] The above settings simplify the structure of the drive unit 82, reduce its overall size, facilitate layout, and improve the practicality of the battery pack 100.

[0093] In some embodiments of this application, the housing 1 is provided with a guide groove 12 for guiding the movement direction of the moving member 81, and the moving member 81 is movably engaged with the guide groove 12. For example, referring to Figures 8-9, a guide groove 12 can be provided on the side wall of the housing 1. The guide groove 12 extends along the movement direction of the moving member 81 and at least partially overlaps with the opening 11. The moving member 81 is movably installed in the guide groove 12. When the driving member 82 drives the moving member 81 to move, the side wall of the guide groove 12 can guide the moving member 81. This improves the movement stability of the moving member 81, enhances the switching stability of the opening 11, and helps reduce the space occupied by the moving member 81.

[0094] In some embodiments of this application, the battery pack 100 of the electric device in this application embodiment further includes a charging control module 5. The charging control module 5 is electrically connected to the charging interface 4 and the battery pack 2 respectively. The charging control module 5 is configured to control the charging interface 4 and the battery pack 2 to conduct when receiving a charging command. The charging control module 5 is electrically connected to the opening and closing component 8. The charging control module 5 is configured to control the opening and closing component 8 to open the opening 11 when receiving a charging command.

[0095] For example, referring to Figures 1-2, the battery pack 100 also includes a charging control module 5. The charging control module 5 is electrically connected to the charging interface 4 and the busbar component 22, respectively. The charging control module 5 is configured to control the charging interface 4 to conduct through the busbar component 22 when a charging command is received, so that the charging interface 4 can charge the battery pack 2 through the busbar component 22. At the same time, the charging control module 5 can be electrically connected to the opening and closing component 8, and the charging control module 5 is configured to control the opening and closing component 8 to open the opening 11 when a charging command is received.

[0096] Specifically, when the charging control module 5 receives a charging command, it can control the opening / closing component 8 to open the opening 11, allowing the charging gun of the external charging device to engage with the charging interface 4 through the opening 11. The charging control module 5 can also control the charging interface 4 to connect with the busbar component 22, enabling the charging interface 4 to charge the battery pack 2 through the busbar component 22. When charging is complete or the battery pack 100 overheats, the charging control module 5 can control the charging interface 4 to disconnect from the busbar component 22, thereby stopping charging the battery pack 2. Then, the charging gun can be disconnected from the charging interface 4, and the charging control module 5 can control the closing component to close the opening 11. This improves the reliability of the battery pack 100 during the charging process.

[0097] In some embodiments of this application, the charging interface 4 is exposed outside the battery pack 100, and the electric device 1000 is provided with a clearance opening to avoid the charging interface 4, allowing the charging gun of an external charging device to directly connect to the charging interface 4 through the clearance opening. This design reduces the difficulty of connecting the charging gun to the charging interface 4, improves user convenience, simplifies the structure of the battery pack 100, and enhances the waterproofness of the battery pack 2.

[0098] In some embodiments of this application, the battery pack 100 further includes a high-voltage interface 91 and a low-voltage interface 92. The high-voltage interface 91 and the low-voltage interface 92 are disposed on the housing 1 and electrically connected to the battery pack 2, respectively. The battery pack 100 is adapted to supply power to the remaining components of the electric device 1000 through the high-voltage interface 91 and the low-voltage interface 92. This improves the design rationality of the battery pack 100.

[0099] This application also proposes a vehicle chassis 200.

[0100] As shown in FIG10, the chassis 200 of the vehicle according to an embodiment of the present application includes a battery pack 100 of an electric device according to any of the above embodiments.

[0101] According to the vehicle chassis 200 of the present application embodiment, by providing a charging interface 4 on the battery pack 100, an external charging device can directly charge the battery pack 100 through the charging interface 4, which helps to shorten the charging flow path, reduce the energy waste caused by power transmission impedance, improve charging efficiency, reduce charging time, and improve the overall performance of the chassis 200.

[0102] In some embodiments of this application, the housing 1 can be configured as part of the vehicle's floor. This configuration allows the battery pack 100 to be integrated with the chassis 200 (i.e., CTB technology), saving space within the vehicle and enabling it to accommodate more and larger batteries, thus improving the vehicle's range.

[0103] This application also proposes an electric device 1000.

[0104] As shown in Figure 11, the electric device 1000 according to an embodiment of this application includes a battery pack 100 of the electric device according to any of the above embodiments or a chassis 200 of a vehicle according to any of the above embodiments, wherein the vehicle is directly charged through the charging interface 4. It should be noted that the electric device 1000 can be a vehicle, aircraft, ship, etc.

[0105] According to the embodiments of this application, the electric device 1000 has a charging interface 4 on the battery pack 100, which allows an external charging device to directly charge the battery pack 100 through the charging interface 4. This helps to shorten the charging path, reduce the energy waste caused by power transmission impedance, improve charging efficiency, reduce charging time, and enhance user satisfaction.

[0106] This application also proposes a charging control method for electric devices.

[0107] As shown in Figure 12, according to the charging control method of the electric device according to the embodiments of this application, the electric device 1000 includes a battery pack 100 according to any of the above embodiments, and the control method includes:

[0108] S10: Receive charging command. That is, when the user drives the electric device 1000 into the charging space, the user can issue a charging command through the car key or a button on the dashboard, so that the communication module 3 of the battery pack 100 can receive the charging command.

[0109] S20: In response to a charging command, control the charging interface 4 and battery pack 2 to conduct in order to charge the battery pack 100. That is, when the communication module 3 receives a charging command, the communication module 3 can transmit the charging command to the charging control module 5, so that the charging control module 5 can control the charging interface 4 and the busbar component 22 to conduct, so that the charging interface 4 can charge the battery pack 2 through the busbar component 22; when the battery pack 100 is fully charged or the temperature is too high, the charging control module 5 can disconnect the charging interface 4 from the busbar component 22 to stop charging the battery pack 100.

[0110] According to the charging control method for electric devices in the embodiments of this application, by setting the charging interface 4 to be electrically connected to the busbar component 22 after receiving a charging command, the battery pack 100 can be prevented from being electrically connected to an external charging device when it is not charging, which helps to improve the safety of the battery pack 100.

[0111] In some embodiments of this application, as shown in FIG12, the method further includes, before controlling the charging interface 4 and the bus component 22 to be turned on:

[0112] S30: If the charging port 4 is not connected to the external charging device, a prompt message is issued. That is, after receiving a charging command, the charging control module 5 can detect the connection status between the charging port 4 and the external charging device. If the charging port 4 is successfully connected to the external charging device, the charging control module 5 can control the charging port 4 to conduct through the busbar component 22; if the charging port 4 is not connected to the external charging device, the charging control module 5 can issue a prompt message to remind the user to replace the external charging device or check the connection status of the external charging device. Specifically, the prompt message can be a voice reminder or an icon signal displayed on the panel; this application does not limit this. This allows the user to determine the charging status of the battery pack 100, providing feedback and improving user satisfaction.

[0113] In some embodiments of this application, if the pressure on the charging interface 4 is less than a set threshold, it is determined that the charging interface 4 and the external charging device are not connected; and / or if the electromechanical switch is not closed, it is determined that the charging interface 4 and the external charging device are not connected. The electromechanical switch is located near the charging interface 4. For example, a pressure sensor can be provided at the charging interface 4; or, a pressure sensor can be provided at the charging gun of the external charging device; or, pressure sensors can be provided at both the charging interface 4 and the charging gun of the external charging device. This application does not limit this.

[0114] In other words, when the charging control module 5 receives a charging command, it can detect the pressure on the charging interface 4 using a pressure sensor. If the detected pressure is less than a set threshold, the external charging device may not be connected to the charging interface 4 or the connection may be unstable. In this case, it can be determined that the charging interface 4 is not connected to the external charging device, and a prompt message will be issued. Conversely, if the detected pressure is greater than or equal to the set threshold, it can be determined that the charging interface 4 has successfully connected to the external charging device, and the battery pack 100 begins charging. This reduces the difficulty of detection, improves detection accuracy, and enhances the reliability of the battery pack.

[0115] Alternatively, a mechanical-electronic switch can be installed near the charging interface 4 on the battery pack 100. When the charging gun of the external charging device extends towards the charging interface 4, if the charging gun contacts the mechanical-electronic switch, causing the switch to close, it can be determined that the external charging device is connected to the charging interface 4; if the charging gun does not contact the mechanical-electronic switch, causing the switch not to close, it can be determined that the external charging device is not connected to the charging interface 4. This improves the reliability of the detection.

[0116] Of course, a pressure sensor can be installed on the charging port 4, and a mechanical-electronic switch can be installed on the battery pack 100 near the charging port 4. This can improve the accuracy of detection.

[0117] In the specific operation process, as shown in Figure 13, when a user drives the electric device 1000 into the charging area with bottom charging, it can sense the external charging device through the communication module 3, and then obtain a charging command after user confirmation; if the user refuses to confirm or fails to confirm within the time limit, the electric device 1000 will park normally. It should be noted that the external charging device can also identify the user ID and send the billing plan.

[0118] Then, the communication module 3 can send the charging command to the charging control module 5. After receiving the charging command, the main controller of the charging control module 5 can send the charging command to the external charging device through the vehicle wireless module. The external charging device performs a self-test. If the external charging device is faulty, it will prompt the user with an error message. If the external charging device is normal, the main controller of the charging control module 5 can output an opening signal to the opening and closing component 8. The motor 821 runs to drive the rotating component 822 to rotate. The rotating component 822 can drive the moving component 81 to move within the guide groove 12 through the conversion component 823, thereby opening the opening 11. At this time, the charging interface 4 is exposed, the external charging device starts to work, and the charging gun can be extended into the opening 11 and dock with the charging interface 4, including but not limited to plug-in type or contact type.

[0119] Next, it can be determined whether the charging interface 4 has been successfully connected to the external charging device. If it is determined that the charging interface 4 has not been successfully connected to the external charging device, the charging gun can be adjusted, and the determination can be repeated after adjustment. If the adjustment is repeated more than three times, an error message will be displayed to the user. If it is determined that the charging interface 4 has been successfully connected to the external charging device, the charging control module 4 can control the positive switch 51 and the negative switch 52 to electrically connect with the busbar component 22, so that the charging interface 4 can charge the battery pack 2 through the busbar component 22. At this time, the heat exchange component 6 starts to work, and the heat exchange component 6 can exchange heat with the battery pack 2 and the charging control module 5 respectively to prevent the battery pack 100 from overheating.

[0120] Next, when the main controller of the charging control module 5 begins to monitor the SOC of the battery pack 100 in real time, and the battery pack 100 is fully charged or a user's charging termination command is received, the vehicle wireless module outputs a charging completion signal. Upon receiving the charging completion signal, the external charging device controls the charging gun to retract from the opening 11 to disconnect from the charging interface 4. Then, the main controller of the charging control module 5 outputs an opening signal to the opening / closing assembly 8, and the motor 821 starts running to drive the rotating component 822 to rotate in the opposite direction. The rotating component 822 can drive the moving component 81 to move within the guide groove 12 through the conversion component 823, thereby closing the opening 11. Finally, the user completes the payment and starts the car to leave the charging area.

[0121] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0122] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0123] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0124] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0125] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0126] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery pack (100) of an electrically powered device, wherein, The battery pack (100) is provided with a charging interface (4), and the battery pack (100) further includes: Shell (1); A battery pack (2) is disposed inside the housing (1), and a charging interface (4) is electrically connected to the battery pack (2) to charge the battery pack (100) through the charging interface (4); the charging interface (4) is adapted to be directly electrically connected to an external charging device.

2. The battery pack (100) of the electrically powered device according to claim 1, wherein The charging interface (4) is located at the bottom or side of the housing (1).

3. The battery pack (100) of an electrically powered device according to claim 1 or 2, wherein, The charging interface (4) includes at least two contact metal pieces (41); and / or The charging interface (4) includes a plug interface (42).

4. The battery pack (100) of the electrically powered device according to claim 3, wherein The charging interface (4) includes at least two contact metal pieces (41), and the external charging device includes a charging metal piece, wherein the area of ​​each contact metal piece (41) is adapted to be larger than the area of ​​the charging metal piece.

5. The battery pack (100) of the electrically powered device according to claim 4, wherein The sum of the areas of the contact metal pieces (41) of the same polarity ≥ 3000 mm 2 .

6. The battery pack (100) of an electrically powered device according to claim 4 or 5, wherein The contact metal sheet (41) is adapted to be arranged at an angle to the charging metal sheet.

7. The battery pack (100) of the electrically powered device according to claim 1, wherein, It also includes a charging control module (5), which includes a main controller, a positive switch (51) and a negative switch (52). The main controller is used to receive charging commands. The main controller is electrically connected to the positive switch (51) and the negative switch (52) respectively to control their opening and closing. The charging interface (4) is electrically connected to the battery pack (2) through the positive switch (51) and the negative switch (52).

8. The battery pack (100) of the electrically powered device according to claim 7, wherein The charging interface (4) is exposed on the charging control module (5).

9. The battery pack (100) of an electrically powered device according to claim 7 or 8, wherein, The charging interface (4) is electrically connected to the input terminal of the positive switch (51) via a metal conductive plate, and / or the charging interface (4) is electrically connected to the input terminal of the negative switch (52) via a metal conductive plate.

10. The battery pack (100) of the electrically powered device according to any one of claims 7-9, wherein, The battery pack (2) includes multiple cells (21), which are electrically connected to a busbar (22); the output terminal of the positive switch (51) is directly electrically connected to the busbar (22), and / or the output terminal of the negative switch (52) is directly electrically connected to the busbar (22).

11. The battery pack (100) of the electrically powered device according to any one of claims 7-10, wherein, It also includes a communication module (3), which interacts with external devices to receive charging commands and is communicatively connected to the main controller.

12. The battery pack (100) of the electrically powered device according to any one of claims 7-11, wherein, It also includes a heat exchange assembly (6) for exchanging heat with the battery pack (2).

13. The battery pack (100) of the electrically powered device according to claim 12, wherein A portion of the heat exchange assembly (6) extends to the charging control module (5) for heat exchange with the charging control module (5).

14. The battery pack (100) of the electrically powered device according to any one of claims 1-13, wherein, It also includes a buffer (7), which is disposed between the bottom wall of the housing (1) and the battery pack (2).

15. The battery pack (100) of the electrically powered device according to any one of claims 1-14, wherein, The housing (1) is provided with an opening (11) for avoiding the charging interface (4).

16. The battery pack (100) of the electrically powered device according to claim 15, wherein It also includes an opening / closing assembly (8) for opening or closing the opening (11), the opening / closing assembly (8) being disposed in the housing (1).

17. The battery pack (100) of the electrically powered device according to claim 16, wherein The opening and closing assembly (8) includes a movable member (81) and a driving member (82). The movable member (81) is movably disposed on the housing (1) to open or close the opening (11). The driving member (82) is connected to the movable member (81) to drive the movable member (81) to move.

18. The battery pack (100) of the electrically powered device according to claim 17, wherein The drive unit (82) includes: Electric motor (821); A rotating component (822) is connected to the motor (821) and is driven to rotate by the motor (821); A conversion element (823) is connected to the rotating element (822) and the moving element (81) respectively. The conversion element (823) is used to convert the rotation of the rotating element (822) into the movement of the moving element (81).

19. The battery pack (100) of an electrically powered device according to claim 17 or 18, wherein, The housing (1) is provided with a guide groove (12) for guiding the movement direction of the moving member (81), and the moving member (81) moves in cooperation with the guide groove (12).

20. The battery pack (100) of the electrically powered device according to any one of claims 16-19, wherein, It also includes a charging control module (5), which is electrically connected to the charging interface (4) and the battery pack (2) respectively. The charging control module (5) is configured to control the charging interface (4) and the battery pack (2) to be turned on when a charging command is received. The charging control module (5) is electrically connected to the opening and closing component (8), and the charging control module (5) is configured to control the opening and closing component (8) to open the opening (11) when receiving the charging command.

21. The battery pack (100) of the electrically powered device according to any one of claims 1-20, wherein, The charging interface (4) is exposed outside the battery pack (100), and the electric device (1000) is provided with a clearance to avoid the charging interface (4).

22. A chassis (200) of a vehicle, wherein Includes a battery pack (100) for an electric device according to any one of claims 1-21.

23. The chassis (200) of the vehicle according to claim 22, wherein, The housing (1) is constructed as part of the vehicle's floor.

24. An electrically powered device (1000), wherein, The vehicle may include a battery pack (100) of an electric device according to any one of claims 1-21 or a chassis (200) of a vehicle according to any one of claims 22-23, wherein the vehicle is charged directly via a charging interface (4).

25. A charge control method of an electric power driven apparatus, wherein The electric device 1000 includes a battery pack (100) according to any one of claims 1-21, and the control method includes: Receive charging command; In response to the charging command, the charging interface (4) and the battery pack (2) are turned on to charge the battery pack (100).

26. The charging control method of a motor-driven device according to claim 25, wherein Before controlling the charging interface (4) and the battery pack (2) to be connected, the method further includes: issuing a prompt message if the charging interface (4) and the external charging device are not connected.

27. The charging control method of a motor-driven device according to claim 26, wherein If the pressure on the charging interface (4) is less than a set threshold, it is determined that the charging interface (4) and the external charging device are not connected; and / or When it is determined that the electromechanical switch is not closed, it is determined that the charging interface (4) and the external charging device are not connected, and the electromechanical switch is set near the charging interface (4).

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