High-voltage box module for battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a high-voltage box module for a battery pack, which comprises a box body and a box cover matched with each other, the bottom wall of the box body is provided with a pair of symmetrical step plates, and the surfaces of the two step plates are provided with support plates for bearing functional parts of a high-voltage box; the inner wall of the box body is provided with a high-voltage box main board mounting position for mounting a high-voltage box main board, and the high-voltage box functional component is electrically connected with the high-voltage box main board; the outer wall of the box body is also provided with a plurality of functional connectors, and the functional connectors are connected with the high-voltage box functional parts. The supporting plate is located below the high-voltage box main board and is not in contact with the high-voltage box main board. The high-voltage box module is simple in structure, can effectively improve the assembly efficiency between the high-voltage box function module and the high-voltage box mainboard and between the high-voltage box function module and the functional plug connector, effectively ensures the accurate work of each high-voltage box function component, and is not interfered by the battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a high-voltage box module for a battery pack. Background Art

[0002] At present, new energy vehicles have received extensive attention from all sectors of society due to their excellent environmental protection performance, and the requirements for new energy vehicles are also constantly increasing. As a type of new energy vehicle, electric vehicles are also constantly developing in the direction of high safety, high energy ratio, and lightweight. The main factor determining the driving range of an electric vehicle is the power supply battery. Different specifications of power supply batteries can be selected for different vehicle models to meet the driving requirements.

[0003] The power supply battery for an electric vehicle is generally a battery pack composed of multiple battery cell modules, that is, multiple battery cell modules are stacked in the same box, and then the individual battery cell modules are connected. As the core battery cell module, the corresponding number of battery cells is generally configured according to the magnitude of the voltage to be output, and then all the battery cells are connected to output the voltage. The voltage output of the battery module needs to be pre-connected to the high-voltage box of the battery pack built into the box.

[0004] Among them, the high-voltage box of the battery pack plays a crucial role in new energy vehicles, and its functions are mainly reflected in the following aspects:

[0005] 1. Electric energy input and output: The high-voltage distribution box receives high-voltage direct current from the battery pack and distributes the electric energy to various high-voltage electrical devices, such as motors, air-conditioning compressors, etc., according to the control instructions of the vehicle. At the same time, when necessary, it can also collect the electric energy generated by the devices and return it to the battery pack to achieve the recycling and distribution of electric energy.

[0006] 2. Control and protection of electric energy: The high-voltage distribution box precisely controls and protects the electric energy through multiple integrated high-voltage relays, fuses and other devices. For example, when detecting an abnormal circuit (such as overload, short circuit, etc.), it will cut off the current in time to prevent the expansion of the fault and protect the circuit and electrical equipment from damage.

[0007] 3. Real-time monitoring: The high-voltage distribution box has functions of current and voltage acquisition, and can real-time monitor the high-voltage connection state and insulation state to ensure the safety of the vehicle during driving. Once abnormal situations such as overcurrent, overvoltage, and overheating are detected, it will quickly cut off the high voltage to prevent damage to the vehicle and passengers.

[0008] 4. Overcurrent, overvoltage, and overheating protection: The high-voltage distribution box is built-in with overcurrent, overvoltage, overheating and other protection functions, and can cut off the high voltage in time when abnormal situations occur to prevent the expansion of the fault and ensure the safety of the vehicle and passengers.

[0009] 5. CAN Communication Function: The high-voltage distribution box also has the CAN communication function, which can perform real-time data exchange with other vehicle systems to achieve intelligent management. This enables the vehicle to more precisely control the use and distribution of electrical energy, improve energy utilization efficiency, and enhance the overall performance and safety of the vehicle.

[0010] 6. Fault Handling Record: The high-voltage distribution box can record and store fault information, providing an important basis for vehicle fault diagnosis and repair. This helps maintenance personnel quickly locate the problem, improve repair efficiency, and reduce repair costs.

[0011] In summary, the high-voltage box of the battery pack plays a role in power management, high-voltage safety management, intelligent management, and various other functions in new energy vehicles. Its performance and safety are directly related to the overall performance of the vehicle and the safety of passengers.

[0012] Existing high-voltage boxes mostly adopt an in-built type for the convenience of connecting with the battery cell modules, that is, the high-voltage box is installed inside the battery pack box body and is in the same space as the battery cell modules. Since a large amount of heat is generated during the operation of the battery cell modules, it will affect the normal operation of the high-voltage box located in the same space. In the long run, it may even cause damage to the functional components of the high-voltage box, such as relays, sensors, fuses, etc., and the main board of the high-voltage box. In addition, since the functional components of the high-voltage box need to be integrated into the battery pack box body, a separate space needs to be set inside the box for the installation of the functional components of the high-voltage box. This not only increases the design complexity of the battery pack box body, but also increases the difficulty of wiring between the high-voltage box and the battery cell modules, making more lines exposed inside the box and more vulnerable to the working temperature of the battery cell modules, thus causing damage to the lines. Moreover, for the convenience of external wiring, different interfaces for external plug-in need to be opened on the battery pack box body, making the shape of the battery pack box body more bloated and not conducive to the subsequent installation of the battery pack box body and the vehicle.

[0013] Therefore, there is an urgent need for a new technical solution to solve the above technical problems. Summary of the Invention

[0014] The purpose of the present invention is to overcome the problems of the above-mentioned prior art, and provide a high-voltage box module for a battery pack, which is used to solve the technical problems that the traditional in-built high-voltage box needs to make more modifications to the structure of the battery pack box body for the installation of the high-voltage box functional module and the connection of external connectors, increasing the structural complexity of the battery pack box body, with inconvenient internal wiring, and being affected by the operation of the battery cell modules, resulting in poor working accuracy of the high-voltage box and thus being unable to accurately monitor the battery pack.

[0015] The above purpose is achieved through the following technical solutions:

[0016] A high-voltage box module for a battery pack, comprising a box body and a box cover that match each other. A pair of symmetrically arranged stepped plates are provided on the bottom wall of the box body, and support plates for carrying high-voltage box functional components are provided on the surfaces of the two stepped plates. A high-voltage box main board installation position for installing the high-voltage box main board is provided on the inner wall of the box body, and the high-voltage box functional components are electrically connected to the high-voltage box main board. A number of functional connectors are also provided on the outer wall of the box body, and the functional connectors are connected to the high-voltage box functional components. The support plate is located below the high-voltage box main board and has no contact with the high-voltage box main board.

[0017] Further, the stepped plate includes a vertical support plate and a horizontal support plate that are perpendicular to each other. The bottom end of the vertical support plate is vertically connected to a bottom plate connecting edge, and the top end of the horizontal support plate is vertically connected to a side plate connecting edge.

[0018] Further, the support plate is supported by the horizontal support plates of the two stepped plates, and the support plate and the horizontal support plate are screwed together by support plate screws.

[0019] Further, a flanging extending outward is provided at the top opening of the box body, and a rivet nut is riveted on the flanging. Correspondingly, a rivet nut through hole corresponding to the rivet nut is provided on the box cover, and the box cover is connected to the flanging by connecting a bolt to the rivet nut.

[0020] Further, the rivet nut includes a nut rod for passing through the flanging and a rivet nut upper support portion that fits on the surface of the flanging. The rivet nut through hole can sleeved the rivet nut upper support portion until the box cover fits on the flanging.

[0021] Further, the height of the rivet nut upper support portion is not higher than the thickness of the box cover.

[0022] Further, a washer is also provided between the flanging and the box cover.

[0023] Further, the functional connectors include a fast charging high-voltage connector, an output high-voltage connector, and a single-core connector.

[0024] Further, a pair of symmetrically arranged high-voltage box connecting wing plates are provided on the outside of the box body, and screw holes for connecting fixing screws are provided on the high-voltage box connecting wing plates.

[0025] Further, the bottom side of the high-voltage box connecting wing plate is level with the bottom of the box body.

[0026] A high-voltage box module for a battery pack provided by the present utility model forms an independent high-voltage box module through a split design from the battery pack. Inside, a support plate is used to install the functional components of the high-voltage box, and the high-voltage box main board is installed on the inner wall of the box body, realizing the split installation between the two and the box body. This high-voltage box module not only has a simple structure, can effectively improve the assembly efficiency between the high-voltage box functional module, the high-voltage box main board and the functional plug-in parts, but also has a compact and simple structure without congestion. While effectively ensuring the precise operation of each high-voltage box functional component, it is not interfered by the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of a high-voltage box module for a battery pack according to the present utility model;

[0028] Figure 2 is an exploded view of a high-voltage box module for a battery pack according to the present utility model;

[0029] Figure 3 is an assembly diagram of the high-voltage box main board and the high-voltage box functional components inside the box body of a high-voltage box module for a battery pack according to the present utility model;

[0030] Figure 4 is an assembly schematic diagram of the support plate and the stepped plate in a high-voltage box module for a battery pack according to the present utility model.

[0031] Illustration Marks:

[0032] 1 - Box body, 101 - Flange, 102 - Rivet nut, 103 - Nut rod, 104 - Rivet nut upper support part;

[0033] 2 - Box cover, 201 - Rivet nut through hole;

[0034] 3 - High-voltage box main board installation position;

[0035] 4 - Stepped plate, 401 - Bottom plate connection edge, 402 - Vertical support plate, 403 - Horizontal support plate, 404 - Side plate connection edge, 405 - Support plate screw;

[0036] 5 - High-voltage box main board, 501 - Main board through hole;

[0037] 6 - High-voltage box functional component;

[0038] 7 - Support plate;

[0039] 8 - Functional connector, 801 - Fast charging high-voltage connector, 802 - Output high-voltage connector, 803 - Single-core connector;

[0040] 9 - High-voltage box connection wing plate, 901 - Screw hole;

[0041] 10 - Sheet metal. Detailed implementation

[0042] The present utility model will be further described in detail below with reference to the drawings and embodiments. The described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative work belong to the scope of protection of the present utility model.

[0043] As Figures 1 to 4 shown, this solution provides a high - voltage box module for a battery pack, including a box body 1 and a box cover 2 that match each other. A pair of symmetric step plates 4 are provided on the bottom wall of the box body 1, and a support plate 7 for carrying high - voltage box functional components 6 is provided on the surfaces of the two step plates 4;

[0044] A high - voltage box main - board installation position 3 for installing the high - voltage box main board 5 is provided on the inner wall of the box body 1. The high - voltage box functional components 6 are electrically connected to the high - voltage box main board 5 (in this embodiment, since the connection between the high - voltage box functional components 6, such as relays, sensors, fuses, etc. and the high - voltage box main board 5 belongs to the prior art in this field, and this solution only optimizes their layout structure to make it more convenient for installation. Therefore, the connection circuit relationship between them will not be specifically described). A number of functional connectors 8 are also provided on the outer wall of the box body 1 for quick plug - in wiring with external devices, and the functional connectors 8 are connected to the high - voltage box functional components 6;

[0045] The support plate 7 is located below the high - voltage box main board 5 and has no contact with the high - voltage box main board 5.

[0046] In the assembly of the high - voltage box module in this embodiment, first, the support plate 7 pre - installed with the high - voltage box functional components 6 is installed on the surfaces of the two step plates 4, and then the high - voltage box main board 5 is installed on the high - voltage box installation position 3 on the inner wall of the box body 1. The installation method mainly uses screw connection, that is, nut columns are pre - fixed on the high - voltage box main - board installation position 3, and main - board through - holes 501 corresponding to the nut columns are opened on the high - voltage box main board 5. When the main - board through - holes 501 are sleeved on the nut columns, and then screwed with main - board screws, the high - voltage box main board 5 is fixed to the high - voltage box main - board installation position 3.

[0047] Then, the wiring between the high - voltage box main board 5 and the high - voltage box functional components 6 is completed. Finally, each functional connector 8 is fixed to the outer wall of the box body 1, and the electrical connection between the high - voltage box functional components 6 and the functional connectors 8 is completed.

[0048] It should be noted that in this embodiment, the high - voltage box functional components 6 are electrically connected to each other, and the high - voltage box functional components 6 and the functional connectors 8 are electrically connected through sheet metal 10.

[0049] As shown Figure 4 in the figure, in this embodiment, the stepped plate 4 includes a vertical support plate 402 and a horizontal support plate 403 that are perpendicular to each other. The bottom end of the vertical support plate 402 is vertically connected to a bottom plate connecting edge 401, and the top end of the horizontal support plate 403 is vertically connected to a side plate connecting edge 404.

[0050] Specifically, the bottom plate connecting edge 401 is used to connect with the bottom plate of the box body 1, and the side plate connecting edge 404 is used to connect with the inner wall of the side of the box body 1, thereby realizing the fixed connection of the stepped plate 4 in the box body 1.

[0051] In this embodiment, between the bottom plate connecting edge 401 and the bottom wall of the box body 1, and between the side plate connecting edge 404 and the side wall of the box body 1, fixed connection can be achieved by welding or glue bonding.

[0052] The support plate 7 is supported by the horizontal support plates 403 of the 2 stepped plates 4, and the support plate 7 and the horizontal support plate 403 are screwed together by support plate screws 405.

[0053] Specifically, in order to facilitate the stable connection of the support plate 7 with the stepped plate 4, and to ensure that the assembled support plate 7 will not be separated from the stepped plate 4 when the high-voltage box vibrates or tilts, in this embodiment, threaded holes are provided at both ends of the support plate 7 and on the 2 horizontal support plates 403, and then they are screwed together by support plate screws 405 to realize the fixed connection of the support plate 7 with the 2 stepped plates 4.

[0054] As an optimization of this solution, a flanging 101 extending outward is provided at the top opening of the box body 1, and a rivet nut 102 is riveted on the flanging 101; correspondingly, a rivet nut through hole 201 corresponding to the rivet nut 102 is provided on the box cover 2. By connecting the bolt with the rivet nut 102, the box cover 2 is connected to the flanging 101, thereby achieving the connection of the box cover 2 with the box body 1 and the purpose of sealing and protecting the various high-voltage box functional components 6 and the high-voltage box main board 5 in the box body 1.

[0055] Among them, the rivet nut 102 includes a nut rod 103 for passing through the flanging 101 and a rivet nut upper support portion 104 attached to the surface of the flanging 101;

[0056] The rivet nut through hole 201 can sleeved the rivet nut upper support portion 104 until the box cover 2 is attached to the flanging 101.

[0057] It should be noted that the height of the supporting part 104 on the rivet nut is not higher than the thickness of the box cover 2, and only under this structure can the box cover 2 and the flanging 101 be tightly connected by bolts.

[0058] A washer is also provided between the flanging 101 and the box cover 2 to increase the tightness inside the box and play a further role in dust and water prevention.

[0059] As Figures 1 to 3 shown, in this embodiment, the functional connector 8 includes a fast charging high-voltage connector 801, an output high-voltage connector 802, a single-core connector 803, etc.

[0060] Among them, the fast charging high-voltage connector 801 is used to connect with an external voltage to charge the battery pack.

[0061] The output high-voltage connector 802 is used to connect with an external electrical device to provide voltage to the electrical device.

[0062] The single-core connector 803 is used to connect with the battery pack to manage the voltage and monitor the battery state.

[0063] As Figure 1 and Figure 2 shown, in order to facilitate the connection between this high-voltage box and the vehicle frame, a pair of symmetrically arranged high-voltage box connection wing plates 9 are provided on the outer side of the box body 1. Screw holes 901 for fixing screws to connect are opened on the high-voltage box connection wing plates 9, so as to fixedly connect this high-voltage box module with the vehicle frame through the fixing screws.

[0064] Among them, the bottom side of the high-voltage box connection wing plate 9 is horizontal with the bottom of the box body 1. This structure can ensure that when the high-voltage box connection wing plate 9 is connected with the vehicle frame, it will not occupy the space at the bottom of the box body 1.

[0065] The above is only to illustrate the implementation manner of the present invention and is not used to limit the present invention. For those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high voltage box module for a battery pack, characterized in that: It comprises a box body (1) and a box cover (2) that match each other, wherein a pair of mutually symmetrical step plates (4) are arranged on the bottom wall of the box body (1), and support plates (7) for carrying high-voltage box functional components (6) are arranged on the surfaces of the two step plates (4); A high-voltage box mainboard mounting position (3) for mounting a high-voltage box mainboard (5) is provided on the inner wall of the box body (1), and the high-voltage box functional component (6) is electrically connected to the high-voltage box mainboard (5); a plurality of functional connectors (8) are also provided on the outer wall of the box body (1), and the functional connectors (8) are connected to the high-voltage box functional component (6); The support plate (7) is located below the high-voltage box main board (5) and has no contact with the high-voltage box main board (5).

2. A high voltage box module for a battery pack according to claim 1, characterized in that: The step plate (4) comprises a vertical support plate (402) and a transverse support plate (403) which are perpendicular to each other, the bottom end of the vertical support plate (402) being vertically connected to a bottom plate connecting edge (401), and the top end of the transverse support plate (403) being vertically connected to a side plate connecting edge (404).

3. A high voltage box module for a battery pack according to claim 2, characterized in that: The support plate (7) is supported by the transverse support plates (403) of the two step plates (4), and the support plate (7) and the transverse support plate (403) are screwed together by support plate screws (405).

4. A high voltage box module for a battery pack according to claim 1, characterized in that: The top opening of the box body (1) is provided with a flange (101) extending outward, and a rivet nut (102) is riveted onto the flange (101); correspondingly, a rivet nut through hole (201) corresponding to the rivet nut (102) is provided on the box cover (2), and the box cover (2) is connected to the flange (101) by bolts connected to the rivet nut (102).

5. A high voltage box module for a battery pack according to claim 4, characterized in that: The rivet nut (102) comprises a nut rod (103) for penetrating the flange (101), and an upper support portion (104) of the rivet nut affixed to the surface of the flange (101); The rivet nut through hole (201) can be sleeved with the rivet nut upper support portion (104) until the box cover (2) and the flange (101) are in contact with each other.

6. A high voltage box module for a battery pack according to claim 5, characterized in that: The height of the upper support portion (104) of the rivet nut is no higher than the thickness of the box cover (2).

7. A high voltage box module for a battery pack according to claim 4, characterized in that: A gasket is also provided between the flange (101) and the box cover (2).

8. A high voltage box module for a battery pack according to claim 1, characterized in that: The functional connector (8) comprises a fast-charging high-voltage connector (801), an output high-voltage connector (802) and a single-core connector (803).

9. A high voltage box module for a battery pack according to claim 1, characterized in that: A pair of mutually symmetrical high-voltage box connecting wing plates (9) are arranged on the outer side of the box body (1), and screw holes (901) capable of being connected by fixing screws are provided on the high-voltage box connecting wing plates (9).

10. A high voltage box module for a battery pack according to claim 9, characterized in that: The bottom side of the high-voltage box connecting wing plate (9) is level with the bottom of the box body (1).

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