A new energy vehicle battery protection device

Abstract

This invention relates to the field of battery protection technology and provides a battery protection device for new energy vehicles, including an air-cooling component, a buffer component, and a locking component. The locking component is located at the connection between the battery box and the cover plate, and the bolts between the locking component and the battery box and the cover plate are locked synchronously. This invention combines a liquid cooling plate with an air-cooling component to reduce the space occupied by the liquid cooling plate inside the battery box. Then, the external air-cooling component ensures heat dissipation, reducing the overall volume of the battery box. At the same time, a buffer component is also set outside the air-cooling component. The air-cooling component can play a heat dissipation role on its own, and the air-cooling component and the buffer component can also work together to play a buffering and energy absorption role, thereby providing a reliable protection effect for the battery pack and its internal batteries. Finally, a locking component is set between the battery box and the cover plate. Only a small number of bolts are needed to ensure the reliability of the connection between the battery box and the cover plate.

Description

Technical Field

[0001] This invention relates to the field of battery protection, and more specifically, to a battery protection device for new energy vehicles. Background Technology

[0002] Automotive batteries are primarily used in electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs) to provide power. The most common automotive battery on the market today is the lithium-ion battery, which has become the preferred choice for electric vehicles due to its high energy density, long lifespan, and light weight.

[0003] A car battery pack is a modular system composed of multiple individual battery cells (usually lithium-ion cells). A battery management system (BMS) ensures the safety, performance, temperature control, and charge balance of each battery cell. The battery pack is one of the core components of an electric vehicle.

[0004] A battery mount is a structural component that secures individual battery cells or battery packs to the vehicle chassis. The battery mount must not only support the weight of the battery pack but also ensure its stability, durability, and safety during vehicle operation. It is typically made of high-strength metals or composite materials, offering excellent vibration and impact resistance.

[0005] The battery pack and battery bracket mount the motor onto the vehicle chassis. Liquid cooling is installed inside the battery pack to cool the battery, while external anti-collision and energy-absorbing mechanisms are installed. The battery is then mounted via a bracket. When the battery is subjected to external pressure, the existing cooling plates need to be evenly distributed inside the battery pack, which increases the size of the battery pack. Under pressure, it can directly damage the internal components, and the protection effect needs to be improved. At the same time, in order to ensure sealing and protection, the battery pack and the cover plate need to be connected with many bolts. Although this ensures stability, it is not convenient to disassemble and assemble, and it takes a long time.

[0006] To address the aforementioned issues, this application proposes a battery protection device for new energy vehicles. Summary of the Invention

[0007] The purpose of this invention is to provide a battery protection device for new energy vehicles, which solves the problems in the prior art by combining liquid cooling, air cooling and buffering.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A battery protection device for new energy vehicles includes a mounting base connected to the vehicle, a battery box fixedly mounted on the mounting base, a cover plate on the battery box, a battery pack and a liquid cooling plate installed inside the battery box, and an inner pressure plate at the bottom of the cover plate to press the battery pack and liquid cooling plate together. The battery pack and liquid cooling plate are multiple and spaced apart. The device also includes four sets of air-cooling components, which are fitted together at the four corners of the battery box and extend to one side. These air-cooling components dissipate heat along the entire outer wall of the battery box while also absorbing energy. The air-cooling components include components fixedly mounted on the side of the battery box and... The mounting base has a flow channel, one side of which is fixedly provided with a heat dissipation cavity that fits against the side of the battery box. The heat dissipation cavity is open on the side near the battery box. The flow channel also has a guide block formed on the side near the heat dissipation cavity to guide the airflow to the heat dissipation cavity. The inner side of the heat dissipation cavity is provided with a sound-absorbing plate arranged along the airflow direction. A buffer component is installed on the side of the air-cooling component away from the battery box. The buffer component and the air-cooling component cooperate to form buffering and energy absorption on the four sides of the battery box. A locking component is set at the connection between the battery box and the cover plate. The locking component is locked synchronously with the bolts between the battery box and the cover plate.

[0010] In the above technical solution, the liquid cooling plate is combined with the air cooling component. The fast-acting liquid cooling plate occupies space inside the battery box, and the heat dissipation effect is ensured by the external air cooling component, which reduces the overall volume of the battery box. At the same time, a buffer component is also set outside the air cooling component. The air cooling component can play a heat dissipation role on its own, and the air cooling component and the buffer component can also work together to play a buffering and energy absorption role, thereby providing a reliable protection effect for the battery pack and its internal batteries. Finally, a locking component is set between the battery box and the cover plate. Only a small number of bolts are needed to cooperate with the locking component to ensure the reliability of the connection between the battery box and the cover plate.

[0011] A cooling fan is installed in the flow channel to deliver airflow to the heat dissipation cavity, and a filter screen for the cooling fan is fixed on the outside of the flow channel.

[0012] In the above technical solution, the cooling fan accelerates the airflow speed and is precisely guided to the heat dissipation cavity by the guide block. By placing the cooling fan in this position and cooperating with the flow channel, the space occupied can be reduced more effectively.

[0013] A tripod for energy absorption is fixed inside the heat dissipation cavity. A guide plate is fixed on the tripod to direct airflow to the outer wall of the battery box. An air outlet for diffusing hot airflow is provided at the bottom of the heat dissipation cavity near the battery box.

[0014] In the above technical solution, the tripod can minimize wind resistance while providing support, and take into account heat dissipation and energy absorption, thereby ensuring stable battery operation and improving battery protection.

[0015] The guide plate has a through-hole that directs the airflow to the outer wall of the battery box and the air outlet. The tripod also has a secondary support fixed inside.

[0016] In the above technical solution, both the air guide plate and the air guide hole direct the airflow to the battery box and the air outlet, ensuring the heat dissipation effect while making the airflow smoother, thereby ensuring the heat dissipation effect for a long time.

[0017] The buffer component includes a buffer plate that is vertically arranged and located outside the air-cooling component, a clearance hole that is opened through the buffer plate, and a connecting plate that is hinged to the outside of the flow channel and the clearance hole. A spring sheet is also provided between the flow channel and the connecting plate.

[0018] In the above technical solution, the buffer component can play a certain buffering role, providing more reliable protection for the battery box and the internal battery. In addition, the buffer plate is provided with clearance holes for the movement of the connecting plate, which increases the buffer space within the effective space and makes the structure more compact.

[0019] The outer wall of the flow channel is fixed with a card holder that is inserted into one end of the spring piece, and the connecting plate is provided with a positioning groove for the other end of the spring piece to be embedded on the side near the flow channel.

[0020] In the above technical solution, both the card holder and the positioning groove play a positioning role for the spring piece. At the same time, the spring piece can also be put into the positioning groove after being compressed, thereby increasing the buffer space within the effective space.

[0021] The locking component includes a locking pin that moves horizontally on the upper end of the side wall of the battery box and a return spring disposed between the battery box and the locking pin, as well as a clearance groove opened on the top of the battery box. A locking frame that engages with the front end of the locking pin is opened on the bottom outer side of the cover plate, and a locking plate that engages with the clearance groove is fixed on the bottom of the cover plate.

[0022] In the above technical solution, the locking components are distributed in several groups at the connection between the battery box and the cover plate. The horizontal insertion of the locking components fixes the battery box and the cover plate in the vertical direction. At the same time, the locking components are distributed in four directions of the battery box and the cover plate, which can ensure the reliability of the entire battery pack.

[0023] Bolt holes are provided at the four corners and the middle of each side of the connection between the battery box and the cover plate. The battery box and the cover plate are connected and locked together by bolts passing through the bolt holes.

[0024] In the above technical solution, the number of bolt holes is effectively reduced by the cooperation of the locking components, which facilitates the disassembly and assembly of the cover plate on the battery box, while ensuring the connection reliability of the entire battery pack.

[0025] The mounting base is provided with connecting ears at the four corners for connecting to the vehicle, and a groove is provided at the connection between the mounting base and the battery box;

[0026] In the above technical solution, the connecting ear extends outward to facilitate connection with the vehicle, and the groove is opened on the upper part of the mounting base. When subjected to lateral pressure, the mounting base will deform first from the groove position, thereby causing the mounting base to bend downward, and will not squeeze the battery due to the mounting base bending upward, thus ensuring safety.

[0027] The battery box has an internal channel for connecting the battery pack and liquid cooling plate, and an external module that communicates with the outside is provided on one side of the channel.

[0028] In the above technical solution, the external module is used to connect the battery pack and liquid cooling plate to the outside, ensuring the overall sealing of the battery pack.

[0029] The beneficial effects of this invention are:

[0030] This invention reduces the overall volume of the battery box by placing the liquid cooling plate between the two battery packs instead of surrounding the inner wall of the entire battery box. This allows for more energy absorption space under pressure, resulting in better protection by reducing the size of the battery box.

[0031] This invention sets up four sets of air-cooling components and attaches them to the outside of the battery box. The air-cooling components can form a cooling effect on the entire outside of the battery box, thereby ensuring the heat dissipation effect of the battery inside the battery box. At the same time, the air-cooling components located outside the battery box can also play an energy absorption role when under pressure, realizing active heat dissipation and passive energy absorption, thereby improving the battery protection effect.

[0032] This invention provides a buffer component on the outside of the air-cooled component. First, the buffer component itself can play a certain buffering role. At the same time, it is located on the outside of the air-cooled component. When the side of the vehicle is compressed, the air-cooled component and the buffer component absorb energy at the same time, thereby providing more reliable protection for the battery box and the internal battery. In addition, the buffer plate is provided with clearance holes for the movement of the connecting plate, which effectively improves the compactness.

[0033] This invention, by setting several sets of locking components at the connection between the battery box and the cover plate and using them in conjunction with bolts, can greatly reduce the number of bolts while ensuring the reliability of the connection between the two, thus facilitating the disassembly and assembly of the entire battery pack. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 for Figure 1 A structural diagram viewed from below with the mounting base detached;

[0037] Figure 3 for Figure 1 Top view of the mounting base;

[0038] Figure 4 for Figure 1 Structural diagram of the middle cover plate during removal;

[0039] Figure 5 for Figure 1 Schematic diagram of the middle cover plate;

[0040] Figure 6 for Figure 1 Enlarged structural schematic diagram of the air-cooling component;

[0041] Figure 7 for Figure 6 A top-view, half-section structural diagram of the central channel;

[0042] Figure 8 for Figure 6 Enlarged structural schematic diagram of the central guide vane and tripod, where a is a three-dimensional view with the airflow direction as the front view, b is a side view, and c is the main view;

[0043] Figure 9 for Figure 1 A schematic diagram of the structure of the intermediate buffer component during disassembly;

[0044] Figure 10 for Figure 1 A half-section structural diagram of the central locking component;

[0045] The attached diagram lists the components represented by each number as follows:

[0046] In the diagram: 1. Mounting base; 11. Connecting ear; 12. Recessed groove; 2. Battery box; 21. External module; 3. Cover plate; 31. Internal pressure plate; 4. Battery pack; 5. Liquid cooling plate; 6. Air-cooled component; 61. Flow channel; 610. Heat dissipation cavity; 611. Guide block; 612. Sound-absorbing plate; 62. Cooling fan; 621. Filter screen; 63. Guide plate; 631. Guide hole; 64. Tripod; 641. Secondary bracket; 65. Air outlet; 7. Buffer component; 71. Buffer plate; 72. Clearance hole; 73. Connecting plate; 731. Positioning groove; 74. Spring; 75. Card seat; 8. Locking component; 81. Locking pin; 82. Return spring; 83. Clearance groove; 84. Locking frame; 85. Locking plate; 9. Bolt hole. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0048] like Figure 1 - Figure 10 As shown:

[0049] This embodiment provides a battery protection device for new energy vehicles, including a mounting base 1 connected to the vehicle, a battery box 2 fixedly mounted on the mounting base 1, a cover plate 3 on the battery box 2, a battery pack 4 and a liquid cooling plate 5 installed inside the battery box 2, and an inner pressure plate 31 at the bottom of the cover plate 3 to press the battery pack 4 and the liquid cooling plate 5 together. There are several battery packs 4 and liquid cooling plates 5, which are spaced apart. The device also includes: air-cooling components 6, which are arranged in four groups and attached to the four corners of the battery box 2 and extend to one side. The air-cooling components 6 not only dissipate heat on the entire outer wall of the battery box 2, but also have an energy absorption function; and a buffer component 7, which is installed on the side of the air-cooling components 6 away from the battery box 2. The buffer component 7 and the air-cooling components 6 cooperate to form a buffer and energy absorption on the four sides of the battery box 2.

[0050] As an embodiment of the new energy vehicle battery protection device of the present invention, the air-cooling component 6 includes a flow channel 61 fixedly installed on the side of the battery box 2 and the mounting base 1. A heat dissipation cavity 610 is fixedly provided on one side of the flow channel 61 and fits against the side of the battery box 2. The heat dissipation cavity 610 is open on the side near the battery box 2. A guide block 611 for guiding airflow to the heat dissipation cavity 610 is also formed on the side of the flow channel 61 near the heat dissipation cavity 610. A sound-absorbing plate 612 arranged along the airflow direction is provided inside the heat dissipation cavity 610. A flow channel 61 is installed in the flow channel 61 to guide the airflow to the heat dissipation cavity. The cooling fan 62 that delivers airflow has a filter 621 fixed on the outside of the flow channel 61 for the cooling fan 62. A tripod 64 for absorbing energy is fixed on the inside of the cooling cavity 610. A guide plate 63 that guides the airflow to the outer wall of the battery box 2 is fixed on the tripod 64. An air outlet 65 that diffuses the hot airflow is provided at the bottom of the cooling cavity 610 near the battery box 2. A guide hole 631 that guides the airflow to the outer wall of the battery box 2 and the air outlet 65 is opened through the guide plate 63. A secondary support 641 is also fixed inside the tripod 64.

[0051] Specifically, the operation of the cooling fan 62 drives airflow from the filter 621 into the heat dissipation cavity 610 through the guide block 611. Under the action of the sound-absorbing plate 612, the airflow flows evenly along the heat dissipation cavity 610. Under the action of the guide plate 63 and the guide hole 631, the airflow flows through the outer wall of the battery box 2 and carries away the heat generated by the battery inside the battery box 2. Finally, the hot airflow is discharged from the air outlet 65. The tripod 64 and the secondary support 641 will collapse after being pressed on the side, and the tripod 64 and the secondary support 641 play a double collapse protection role.

[0052] As an embodiment of the new energy vehicle battery protection device of the present invention, the buffer component 7 includes a buffer plate 71 vertically arranged and located outside the air-cooling component 6, an avoidance hole 72 through the buffer plate 71, and a connecting plate 73 hinged between the outside of the flow channel 61 and the avoidance hole 72. A spring piece 74 is also provided between the flow channel 61 and the connecting plate 73. A card seat 75 that is inserted into one end of the spring piece 74 is fixed on the outer wall of the flow channel 61. A positioning groove 731 for the other end of the spring piece 74 is provided on the side of the connecting plate 73 near the flow channel 61.

[0053] Specifically, when the buffer component 7 is not under force, the spring piece 74 pushes the buffer plate 71 outward and away from the flow channel 61. When under pressure, the buffer plate 71 is pushed towards the flow channel 61. At this time, the spring piece 74 is under force to buffer and gradually enters the positioning groove 731 with the pressure. The connecting plate 73 gradually enters the clearance hole 72, which plays a buffering role.

[0054] As an embodiment of the new energy vehicle battery protection device of the present invention, the locking component 8 is provided at the connection between the battery box 2 and the cover plate 3. The locking component 8 is synchronously locked with the bolts between the battery box 2 and the cover plate 3. The locking component 8 includes a locking pin 81 that moves horizontally at the upper end of the side wall of the battery box 2 and a return spring 82 provided between the battery box 2 and the locking pin 81, as well as a clearance groove 83 opened on the top of the battery box 2. A locking frame 84 that is inserted into the front end of the locking pin 81 is opened at the bottom of the outer side of the cover plate 3. A locking plate 85 that is inserted into the clearance groove 83 is fixed at the bottom of the cover plate 3. Bolt holes 9 are opened at the four corners and the middle of each side of the connection between the battery box 2 and the cover plate 3. The battery box 2 and the cover plate 3 are locked together by bolts passing through the bolt holes 9.

[0055] Specifically, when the battery box 2 and the cover plate 3 are separated, the front end of the locking pin 81 automatically disengages from the locking frame 84 under the action of the return spring 82, while the rear end enters the clearance groove 83. When it is necessary to connect the battery box 2 and the cover plate 3, the cover plate 3 covers the upper part of the battery box 2. At this time, the locking plate 85 is inserted into the clearance groove 83 and the locking pin 81 is pushed to engage with the locking frame 84. The bolts pass through the bolt holes 9 on the battery box 2 and the cover plate 3 and are locked to complete the installation.

[0056] As an embodiment of the new energy vehicle battery protection device of the present invention, the mounting base 1 is provided with connecting ears 11 at the four corners for connecting to the vehicle, and a groove 12 is provided at the connection between the mounting base 1 and the battery box 2.

[0057] Specifically, when the mounting base is subjected to lateral pressure, the mounting base 1 will deform from the sink 12 position first, thereby causing the mounting base 1 to bend downward, and will not squeeze the battery due to the upward bending of the mounting base 1, thus ensuring safety.

[0058] As an embodiment of the new energy vehicle battery protection device of the present invention, the battery box 2 has an external channel for the battery pack 4 and the liquid cooling plate 5, and an external module 21 with internal and external communication is provided on one side of the channel.

[0059] Specifically, the battery pack 4 and liquid cooling plate 5 inside the battery pack are connected by wires and pipes and then docked inside the external module 21, and then connected to the outside through the external module 21.

[0060] Understandably, this invention combines a liquid cooling plate with an air-cooling component to reduce the space occupied by the liquid cooling plate inside the battery box. Then, the external air-cooling component ensures heat dissipation, reducing the overall volume of the battery box. At the same time, a buffer component is also set outside the air-cooling component. The air-cooling component can perform heat dissipation on its own, and the air-cooling component and the buffer component can work together to perform buffering and energy absorption, thereby providing reliable protection for the battery pack and its internal batteries. Finally, a locking component is set between the battery box and the cover plate. Only a small number of bolts are needed to ensure the reliability of the connection between the battery box and the cover plate.

[0061] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0062] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery protection device for a new energy vehicle, comprising a mounting base connected to a vehicle, a battery box fixedly mounted on the mounting base, a cover plate provided on the battery box, a battery pack and a liquid cooling plate installed inside the battery box, and an inner pressure plate at the bottom of the cover plate for pressing the battery pack and the liquid cooling plate together, characterized in that, The battery pack and liquid cooling plate are both multiple and spaced apart, and also include: The air-cooling components consist of four sets of components that are fitted and distributed at the four corners of the battery box and extend to one side. These components not only dissipate heat across the entire outer wall of the battery box but also absorb energy. Each air-cooling component includes a flow channel fixedly installed on the side of the battery box and a mounting base. A heat dissipation cavity, fitted to the side of the battery box, is fixedly provided on one side of the flow channel. The heat dissipation cavity is open on the side closest to the battery box. A guide block is also formed on the side of the flow channel near the heat dissipation cavity to direct airflow into the heat dissipation cavity. A sound-absorbing plate is provided inside the heat dissipation cavity, positioned along the airflow direction. A cooling fan, which delivers airflow to the heat dissipation cavity, is installed in the flow channel. A filter screen for the cooling fan is fixed on the outside of the flow channel. A tripod for energy absorption is fixed inside the heat dissipation cavity. A guide plate is fixed on the tripod to direct airflow to the outer wall of the battery box. An air outlet is provided at the bottom of the heat dissipation cavity near the battery box to diffuse the hot airflow. A buffer component is installed on the side of the air-cooling component away from the battery box. The buffer component and the air-cooling component cooperate to form a buffer and absorb energy on the four sides of the battery box. A locking component is provided at the connection between the battery box and the cover plate, and the locking component is synchronously locked with the bolts between the battery box and the cover plate.

2. The new energy vehicle battery protection device according to claim 1, characterized in that: The guide plate has through holes that direct airflow to the outer wall of the battery box and the air outlet. The tripod also has a secondary support fixed inside.

3. The new energy vehicle battery protection device according to claim 1, characterized in that: The buffer component includes a buffer plate that is vertically arranged and located outside the air-cooling component, a clearance hole that passes through the buffer plate, and a connecting plate that is hinged between the outside of the flow channel and the clearance hole. A spring sheet is also provided between the flow channel and the connecting plate.

4. A new energy vehicle battery protection device according to claim 3, characterized in that: The outer wall of the flow channel is fixed with a card holder that is inserted into one end of the spring piece, and the connecting plate is provided with a positioning groove for the other end of the spring piece to be embedded on the side near the flow channel.

5. A new energy vehicle battery protection device according to claim 1, characterized in that: The locking component includes a locking pin that moves horizontally to the upper end of the side wall of the battery box and a return spring disposed between the battery box and the locking pin, as well as a clearance groove opened on the top of the battery box. A locking frame that engages with the front end of the locking pin is opened on the bottom outer side of the cover plate, and a locking plate that engages with the clearance groove is fixed on the bottom of the cover plate.

6. A new energy vehicle battery protection device according to claim 1, characterized in that: Bolt holes are provided at the four corners and the middle of each side of the connection between the battery box and the cover plate. The battery box and the cover plate are connected and locked together by bolts passing through the bolt holes.

7. A new energy vehicle battery protection device according to claim 1, characterized in that: The mounting base has connecting ears at its four corners for connecting to the vehicle, and a groove is provided at the connection point between the mounting base and the battery box.

8. A new energy vehicle battery protection device according to claim 1, characterized in that: The battery box has an internal channel for connecting the battery pack and the liquid cooling plate, and an external module that connects the inside and outside is provided on one side of the channel.

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