New energy automobile battery protection device

Abstract

The invention relates to the technical field of battery protection, and provides a new energy automobile battery protection device which comprises an air cooling component, a buffering component and a locking component, the locking component is arranged at the joint of a battery box and a cover plate, and the locking component is synchronously locked with bolts between the battery box and the cover plate; the liquid cooling plate is matched with the air cooling part, the space occupied by the liquid cooling plate in the battery box is reduced, then the heat dissipation effect is guaranteed through the external air cooling part, the overall size of the battery box is reduced, meanwhile, the buffer part is further arranged outside the air cooling part, the air cooling part can independently achieve the heat dissipation effect, and the service life of the battery box is prolonged. The air cooling part and the buffering part can also be matched to play a role in buffering and energy absorption at the same time, so that a reliable protection effect on the battery pack and the batteries in the battery pack is achieved, finally, the locking part is arranged between the battery box and the cover plate, and the connection reliability of the battery box and the cover plate can be ensured only by matching a small number of bolts with the locking part.

Description

Technical Field

[0001] The present invention relates to the field of battery protection, and more specifically, to a battery protection device for a new energy vehicle. Background Art

[0002] Automotive batteries are mainly used in electric vehicles (EV) and plug-in hybrid electric vehicles (PHEV) to provide a source of power. The most common automotive battery on the market is the lithium-ion battery, which has become the first choice for electric vehicles due to its high energy density, long service life and light weight.

[0003] The automotive battery pack is a modular system composed of multiple single cells (usually lithium battery cells). The battery pack is one of the core components of electric vehicles.

[0004] The battery bracket is a structural component that fixes the battery cell or battery pack to the chassis of the car. The battery bracket not only needs to support the weight of the battery pack, but also needs to ensure its stability, durability and safety during the driving process of the vehicle. It is usually made of high-strength metal or composite materials with good vibration and impact resistance;

[0005] The battery pack and battery bracket install the motor on the vehicle chassis, and then install the battery pack by setting liquid cooling inside the battery pack, setting anti-collision and energy absorption mechanisms outside, and then installing it through the bracket. When the battery is squeezed from the outside, the existing cooling plate needs to be evenly laid in the battery pack, which increases the size of the battery pack and directly causes damage to the inside when it is under pressure, and the protection effect needs to be improved; at the same time, in order to ensure the sealing and protection effect, the battery pack and the cover plate need to be connected by many bolts. Although stability can be guaranteed, disassembly and assembly are not convenient enough and take a long time;

[0006] In order to solve the above problems, this application proposes a new energy vehicle battery protection device. Summary of the invention

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

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A new energy vehicle battery protection device comprises a mounting seat connected to the vehicle, a battery box is fixedly arranged on the mounting seat, a cover plate is arranged on the battery box, a battery pack and a liquid cooling plate are installed inside the battery box, an inner pressure plate for pressing the battery pack and the liquid cooling plate is arranged at the bottom of the cover plate, the battery pack and the liquid cooling plate are both in multiples and distributed at intervals, and further comprises: an air cooling component, the air cooling component is 4 groups of which are closely distributed at the four corners of the battery box and extend to one side to the side, the air cooling component forms heat dissipation on the entire outer wall of the battery box and also has an energy absorption function, the air cooling component comprises a fixed installation on the side of the battery box and an installation A flow channel on the mounting seat, one side of the flow channel is fixedly provided with a heat dissipation cavity attached to the side of the battery box, the heat dissipation cavity is opened near the battery box, and a guide block for guiding the airflow to the heat dissipation cavity is formed on the side of the flow channel near the heat dissipation cavity, and a sound absorbing plate arranged along the airflow direction is arranged on the inner side of the heat dissipation cavity; a buffer component, the buffer component is installed on the side of the air cooling component away from the battery box, and the buffer component cooperates with the air cooling component on the four sides of the battery box to form buffering and energy absorption; a locking component, the locking component is arranged 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;

[0010] In the above technical scheme, the liquid cooling plate is cooperated with the air cooling component, the quick-acting liquid cooling plate occupies space inside the battery box, and then the heat dissipation effect is ensured by the external air cooling component, thereby reducing the overall volume of the battery box. At the same time, a buffer component is also arranged outside the air cooling component, and the air cooling component can play a heat dissipation effect alone. The air cooling component and the buffer component can also cooperate to play a buffering and energy absorption role at the same time, thereby playing a reliable protection effect on the battery pack and the batteries inside it. Finally, a locking component is provided between the battery box and the cover plate, and only a small number of bolts and the locking component are needed to ensure the reliability of the connection between the battery box and the cover plate.

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

[0012] In the above technical solution, the heat dissipation fan accelerates the air flow rate and then accurately guides the air flow to the heat dissipation cavity through the guide block. By arranging the heat dissipation fan at this position to cooperate with the flow channel, the occupied space can be better reduced.

[0013] A tripod for absorbing energy is fixed inside the heat dissipation cavity, a guide plate for directing the airflow to the outer wall of the battery box is fixed on the tripod, and an air outlet for diffusing the hot air flow is provided at the bottom of the heat dissipation cavity near the battery box;

[0014] In the above technical solution, the tripod can reduce wind resistance as much as possible while providing support, taking into account heat dissipation and energy absorption, thereby ensuring stable operation of the battery and improving battery protection effects.

[0015] The guide plate is provided with a guide hole inside to guide the airflow to the outer wall of the battery box and the air outlet, and a secondary bracket is fixed inside the tripod;

[0016] In the above technical solution, the guide plate and the guide holes guide the airflow to the battery box and the air outlet, ensuring the heat dissipation effect while making the airflow smoother, thereby ensuring a long-term heat dissipation effect.

[0017] The buffer component includes a buffer plate vertically arranged and located outside the air-cooling component, a avoidance hole penetrating through the buffer plate, and a connecting plate hinged between the outside of the flow channel and the avoidance hole, and a spring sheet is further arranged 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 batteries, and avoidance holes are provided in the buffer plate for the movement of the connecting plate, which increases the buffer space within the effective space and makes the structure more compact.

[0019] A holder plugged into one end of the spring is fixed to the outer wall of the flow channel, and a positioning groove for the other end of the spring to be embedded is provided on the side of the connecting plate close to the flow channel;

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

[0021] The locking component includes a locking pin horizontally movable at the upper end of the battery box side wall, a return spring arranged between the battery box and the locking pin, and an avoidance groove opened at the top of the battery box, a locking frame inserted into the front end of the locking pin is opened at the bottom of the outer side of the cover plate, and a locking plate inserted into the avoidance groove is fixed at the bottom of the cover plate;

[0022] In the above technical solution, the locking components are divided into several groups and distributed at the connection between the battery box and the cover plate. The battery box and the cover plate are fixed in the vertical direction by horizontal insertion of the locking components. 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 of the connection between the battery box and the cover plate and in the middle of each side, and the battery box and the cover plate are connected by bolts passing through the bolt holes and locked;

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

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

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

[0027] The battery box is provided with an external connection channel for the battery pack and the liquid cooling plate, and one side of the channel is provided with an external connection module communicating with the inside and outside;

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

[0029] Beneficial effects of the present invention:

[0030] The present 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, which provides more energy absorption space when under pressure, and obtains better protection by reducing the volume of the battery box.

[0031] The present invention provides four groups 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 periphery of the battery inside the battery box. At the same time, the air-cooling components located outside the battery box can also absorb energy when under pressure, thereby achieving active heat dissipation and passive energy absorption, thereby improving the battery protection effect.

[0032] The present invention arranges a buffer component on the outside of the air-cooling component. Firstly, the buffer component itself can play a certain buffering role. At the same time, it is located on the outside of the air-cooling component. When the side of the vehicle is compressed, the air-cooling component and the buffer component absorb energy at the same time, thereby playing a more reliable protection role for the battery box and the internal battery. In addition, the buffer plate is provided with an avoidance hole for the movement of the connecting plate, which effectively improves the compactness.

[0033] The present invention can greatly reduce the number of bolts by arranging several groups of locking components at the connection between the battery box and the cover plate and using them in conjunction with bolts, while also ensuring the reliability of the connection between the two, thus providing convenience for the disassembly and assembly of the entire battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 It is a structural schematic diagram of the present invention;

[0036] Figure 2 for Figure 1 Schematic diagram of the structure when viewed from above and the mounting base is detached;

[0037] Figure 3 for Figure 1 A schematic diagram of the structure of the middle mounting seat from a top view;

[0038] Figure 4 for Figure 1 Schematic diagram of the structure when the middle cover is removed;

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

[0040] Figure 6 for Figure 1 An enlarged schematic diagram of the structure of the air cooling component;

[0041] Figure 7 for Figure 6 A schematic diagram of the structure of the mid-flow channel viewed from above and in half section;

[0042] Figure 8 for Figure 6 Schematic diagram of the structure of the middle guide plate and the tripod, wherein a is a stereoscopic view with the airflow direction as the front view, b is a side view, and c is a main view;

[0043] Fig. 9 for Figure 1 The schematic diagram of the structure of the buffer component when it is disassembled;

[0044] Fig.10 for Figure 1 A schematic diagram of the structure of a half-section of the middle locking component;

[0045] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0046] In the figure: 1. mounting base; 11. connecting ear; 12. sink; 2. battery box; 21. external module; 3. cover plate; 31. inner pressure plate; 4. battery pack; 5. liquid cooling plate; 6. air cooling component; 61. flow channel; 610. heat dissipation cavity; 611. guide block; 612. sound absorbing board; 62. cooling fan; 621. filter; 63. guide plate; 631. guide hole; 64. tripod; 641. secondary bracket; 65. air outlet; 7. buffer component; 71. buffer plate; 72. avoidance hole; 73. connecting plate; 731. positioning groove; 74. spring; 75. holder; 8. locking component; 81. locking pin; 82. reset spring; 83. avoidance groove; 84. locking frame; 85. locking plate; 9. bolt hole. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

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

[0049] The present embodiment provides a new energy vehicle battery protection device, including a mounting base 1 connected to the vehicle, a battery box 2 is fixedly provided on the mounting base 1, a cover plate 3 is provided on the battery box 2, a battery pack 4 and a liquid cooling plate 5 are installed inside the battery box 2, an inner pressure plate 31 is provided at the bottom of the cover plate 3 to press the battery pack 4 and the liquid cooling plate 5, the battery pack 4 and the liquid cooling plate 5 are both multiple and distributed at intervals, and also includes: an air cooling component 6, the air cooling component 6 is 4 groups of air cooling components 6 are fitted and distributed at the four corners of the battery box 2 and extend to one side to the side, the air cooling component 6 forms heat dissipation on the entire outer wall of the battery box 2 and also has an energy absorption function, a buffer component 7, the buffer component 7 is installed on the side of the air cooling component 6 away from the battery box 2, and the buffer component 7 cooperates with the air cooling component 6 to form buffering and energy absorption on the four sides of the battery box 2.

[0050] As an embodiment of a 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 seat 1, and a heat dissipation cavity 610 fixedly arranged on one side of the flow channel 61 is attached to the side of the battery box 2. The heat dissipation cavity 610 is opened near the side of the battery box 2. A guide block 611 for guiding the airflow to the heat dissipation cavity 610 is 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 arranged on the inner side of the heat dissipation cavity 610. A sound absorbing plate 612 arranged along the airflow direction is arranged in the flow channel 61. 610 is a heat dissipation fan 62 for conveying airflow, a filter 621 for the heat dissipation fan 62 is fixed on the outside of the flow channel 61, a tripod 64 for absorbing energy is fixed on the inside of the heat dissipation cavity 610, a guide plate 63 is fixed on the tripod 64 to guide the airflow to the outer wall of the battery box 2, an air outlet 65 for diffusing the hot air flow is provided on the bottom of the heat dissipation cavity 610 near the battery box 2, a guide hole 631 is opened inside the guide plate 63 to guide the airflow to the outer wall of the battery box 2 and the air outlet 65, and a secondary bracket 641 is also fixed inside the tripod 64;

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

[0052] As an embodiment of a 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, a avoidance hole 72 penetrating 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 sheet 74 is further arranged between the flow channel 61 and the connecting plate 73, a holder 75 plugged with one end of the spring sheet 74 is fixed to the outer wall of the flow channel 61, and a positioning groove 731 for the other end of the spring sheet 74 to be embedded is provided on the side of the connecting plate 73 close to the flow channel 61;

[0053] Specifically, when the buffer component 7 is not subjected to force, the spring piece 74 pushes the buffer plate 71 outward and away from the flow channel 61. After being compressed, the buffer plate 71 is pushed toward the flow channel 61. At this time, the spring piece 74 is subjected to force for buffering and gradually enters the positioning groove 731 following the pressure, and the connecting plate 73 gradually enters the avoidance hole 72, thereby achieving a buffering effect.

[0054] As an embodiment of a new energy vehicle battery protection device of the present invention, a locking component 8 is arranged at the connection between the battery box 2 and the cover plate 3, and 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 horizontally movable at the upper end of the side wall of the battery box 2 and a return spring 82 arranged between the battery box 2 and the locking pin 81, and an avoidance groove 83 opened at the top of the battery box 2. A locking frame 84 inserted with the front end of the locking pin 81 is opened at the bottom of the outer side of the cover plate 3, and a locking plate 85 inserted with the avoidance groove 83 is fixed at the bottom of the cover plate 3. Bolt holes 9 are opened at the four corners of the connection between the battery box 2 and the cover plate 3 and the middle of each side. The battery box 2 and the cover plate 3 are connected by bolts penetrating the bolt holes 9 and locked;

[0055] Specifically, when the battery box 2 and the cover plate 3 are disengaged, the front end of the locking pin 81 automatically disengages from the locking frame 84 under the action of the return spring 82, and the rear end enters the avoidance groove 83. When the battery box 2 and the cover plate 3 need to be docked, the cover plate 3 is covered on the upper part of the battery box 2. At this time, the locking plate 85 is inserted into the avoidance groove 83 and pushes the locking pin 81 to engage with the locking frame 84. The bolts penetrate the bolt holes 9 on the battery box 2 and the cover plate 3 at the same time and are locked to complete the installation.

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

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

[0058] As an implementation of a new energy vehicle battery protection device of the present invention, an external connection channel for the battery pack 4 and the liquid cooling plate 5 is reserved inside the battery box 2, and an external connection module 21 communicating with the inside and outside is provided on one side of the channel;

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

[0060] It can be understood that the present invention cooperates with the liquid cooling plate and the air cooling component to reduce the space occupied by the liquid cooling plate inside the battery box, and then ensures the heat dissipation effect through the external air cooling component, thereby reducing the overall volume of the battery box. At the same time, a buffer component is also arranged outside the air cooling component. The air cooling component can play a heat dissipation effect alone, and the air cooling component and the buffer component can also cooperate to play a buffering and energy absorption role at the same time, thereby providing reliable protection for the battery pack and the batteries inside it. Finally, a locking component is provided between the battery box and the cover plate, and only a small number of bolts need to be used in conjunction with the locking component to ensure the reliability of the connection between the battery box and the cover plate.

[0061] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicate orientation or positional relationship, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0062] Finally, it should be noted that the above 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery protection device for a new energy vehicle, comprising a mounting seat connected to a vehicle, a battery box fixedly arranged on the mounting seat, a cover plate arranged on the battery box, a battery pack and a liquid cooling plate arranged inside the battery box, an inner pressure plate for pressing the battery pack and the liquid cooling plate at the bottom of the cover plate, characterized in that: The battery packs and liquid cooling plates are both in multiple numbers and are distributed at intervals, and further include: Air cooling components, the air cooling components are 4 groups that are distributed at the four corners of the battery box and extend to one side to the side. The air cooling components not only form heat dissipation on the entire outer wall of the battery box, but also have an energy absorption function. The air cooling components include a flow channel fixedly mounted on the side of the battery box and the mounting seat. A heat dissipation cavity that is fixedly mounted on the side of the battery box is provided on one side of the flow channel. The heat dissipation cavity is opened on the side close to the battery box. A guide block that guides the airflow to the heat dissipation cavity is formed on the side close to the heat dissipation cavity. A sound absorbing panel arranged along the airflow direction is provided on the inner side of the heat dissipation cavity. A buffer component, wherein the buffer component is installed on a side of the air cooling component away from the battery box, and the buffer component cooperates with the air cooling component to form a buffer and energy absorption on four sides of the battery box; The locking component is arranged 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. A new energy vehicle battery protection device according to claim 1, characterized in that: A heat dissipation fan for conveying airflow to the heat dissipation cavity is installed in the flow channel, and a filter screen for the heat dissipation fan is fixed on the outside of the flow channel.

3. A new energy vehicle battery protection device according to claim 1, characterized in that: A tripod for absorbing energy is fixed inside the heat dissipation cavity, a guide plate for directing airflow to the outer wall of the battery box is fixed on the tripod, and an air outlet for diffusing hot air flow is provided at the bottom of the heat dissipation cavity near one side of the battery box.

4. A new energy vehicle battery protection device according to claim 3, characterized in that: The guide plate is provided with guide holes inside to guide the airflow to the outer wall of the battery box and the air outlet, and a secondary bracket is fixed inside the tripod.

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

6. A new energy vehicle battery protection device according to claim 5, characterized in that: A holder plugged with one end of the spring is fixed on the outer wall of the flow channel, and a positioning groove for embedding the other end of the spring is provided on one side of the connecting plate close to the flow channel.

7. A new energy vehicle battery protection device according to claim 1, characterized in that: The locking component includes a locking pin that moves horizontally at the upper end of the side wall of the battery box, a return spring arranged between the battery box and the locking pin, and an avoidance groove opened on the top of the battery box. A locking frame that is inserted into the front end of the locking pin is opened at the bottom of the outer side of the cover plate, and a locking plate that is inserted into the avoidance groove is fixed to the bottom of the cover plate.

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

9. A new energy vehicle battery protection device according to claim 1, characterized in that: The four corners of the mounting seat are provided with connection ears connected to the vehicle, and a sink groove is provided at the connection between the mounting seat and the battery box.

10. A new energy vehicle battery protection device according to claim 1, characterized in that: An external connection channel for the battery pack and the liquid cooling plate is reserved inside the battery box, and an external connection module communicating with the inside and outside is provided on one side of the channel.

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