Battery bracket and commercial vehicle

Abstract

The invention belongs to the technical field, and discloses a battery bracket and a commercial vehicle. Wherein the frame body is rectangular and is vertically mounted on the side surface of a battery, inclined ribs are connected in the frame body in the diagonal direction, suspension mounting parts are arranged at corners of the frame body, vertical ribs are formed on the suspension mounting parts in a protruding manner and are connected with a top beam, battery brackets are mounted at two ends of the top beam, the frame body is connected with a bracket plate, and the bracket plate is mounted on one side of the battery; the top of the frame is connected with a working platform which is installed on the upper side of the battery, and the frame is further connected with a side protection plate, a battery skin and a charging box. The problems that in the prior art, the number of parts around a battery support is large, and the space of a battery is occupied are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric commercial vehicles, and particularly relates to a battery bracket and a commercial vehicle. Background Art

[0002] The new energy transformation in the field of commercial vehicles has become the focus of the industry. According to the statistics of the International Energy Agency, the carbon emissions of commercial vehicles account for more than 40% of the total in the transportation field, and the breakthrough of electrification technology will directly affect the achievement of emission reduction targets. At present, mainstream commercial electric vehicles are generally equipped with 300 - 500 kWh battery packs, but the actual working condition endurance is generally less than 300 kilometers, which is difficult to meet the requirements of scenarios such as logistics transportation and intercity freight. Fundamentally speaking, the improvement of the energy density of the battery system is restricted by multiple technical contradictions, especially there are significant bottlenecks in reliability, space utilization and lightweight design. The capacity of the battery pack needs to be further improved to meet the needs of daily vehicle travel. However, due to the poor working environment of commercial vehicles, it will pose a test to the reliability of the battery. The large vibration of commercial vehicles will cause abnormal vibration of the battery pack.

[0003] Commercial vehicles are large in size. In order for commercial electric vehicles to achieve the expected design endurance, it is usually necessary to install batteries with large size and weight on the body of the commercial vehicle. Due to space limitations on commercial vehicles, the batteries are usually installed on the rear side of the cab, or connected to the crossbeam of the commercial vehicle through suspension. The battery will vibrate and tilt during driving. The battery frame is generally frame-type, and the battery is placed in a battery holder. During vehicle driving, the battery will squeeze the two sides and the bottom surface of the frame. The vehicle also needs to integrate the battery working platform, charging device and other components around the frame. The above components are connected to the body through independent brackets, which will cause the space on the vehicle to be occupied, limit the battery volume, reduce the battery capacity, and reduce the battery life. At the same time, the strength of the battery holder under the existing technology is reduced, and the battery will vibrate at high frequency during vehicle driving. Commercial vehicles face a more severe vibration environment than passenger cars. According to the ISO 16750-3 standard test data, when an 8-ton electric truck is driving on a Class B road (a typical national highway), the vertical vibration acceleration of the battery pack installation position can reach 3.5-5.2g, and the frequency distribution is concentrated in the range of 8-25Hz, which forms a resonance risk with the natural frequency of the battery module (12-18Hz). Existing frame-type battery brackets mostly use Q345B steel welding structure, and its inherent damping coefficient is only 0.03-0.05, which is difficult to effectively attenuate vibration energy. What is more serious is that the lateral acceleration of the battery pack can reach 0.8g under the condition of sharp turns of commercial vehicles, resulting in periodic shear stress between the module and the bracket. The measured data of a leading car company showed that in the 100,000-kilometer endurance test of the traditional battery frame, the side panel weld had a cumulative plastic deformation of 2.1mm, which directly caused the electrolyte leakage accident, which would lead to the risk of fracture of the battery bracket. If the load-bearing capacity of the battery bracket is increased, the battery bracket needs to be thickened, resulting in excessive gross weight of the vehicle.

[0004] Under the existing technology, special-shaped batteries are often installed at the bottom of the vehicle, in which the cross-section of the battery is in the shape of a mountain, and three groups of parallel protrusions are formed on the top of the battery. A mounting groove is formed between each group of protrusions, and the battery frame is installed on both sides of the battery. The frames are connected by a top beam and a bottom plate, and the battery is placed on the bottom plate between the upper battery frames. Due to space limitations, the battery capacity is low. At the same time, the total weight of the battery frame and other battery accessories is heavy, which reduces the vehicle's endurance. Summary of the invention

[0005] The object of the present invention is to provide a battery bracket and a commercial vehicle, so as to solve the problem that the battery bracket has many parts around it and occupies the space of the battery in the prior art.

[0006] To achieve this purpose, the present invention adopts the following technical solutions: The present invention provides a battery bracket, which includes a frame body. The frame body is vertically installed on the side of the battery in a rectangular shape. Diagonal ribs are connected in the frame body. Suspension mounting parts are provided at the corners of the frame body. Vertical ribs are formed by protrusions on the suspension mounting parts. The vertical ribs are connected to the top beam. The two ends of the top beam are used to install the battery bracket. The frame body is connected to a support plate. The support plate is installed on one side of the battery. The top of the frame body is connected to a working platform. The working platform is installed on the upper side of the battery. The frame body is also connected to a side protection plate, a battery skin, and a charging box.

[0007] Preferably, the cross-section of the diagonal rib is T-shaped and perpendicular to the projection of the plane where the frame body is located. The diagonal rib is arc-shaped.

[0008] Preferably, the frame body is vertically installed on both sides of the battery. Four groups of first connection holes are provided on the beam body on the upper side of the frame body. Fasteners are installed in the first connection holes and are connected to the working platform.

[0009] Preferably, a bracket connection part is installed on the vertical beam body on one side of the frame body. The bracket connection part is triangular. Three groups of second connection holes are provided on the bracket connection part. Fasteners are installed in the second connection holes and are connected to the support plate. The support plate is connected to the frame body on both sides respectively.

[0010] Preferably, third connection holes are provided on the frame body away from the bracket connection part. Fasteners are installed in the third connection holes and are connected to the side protection plate.

[0011] Preferably, an extension beam is formed by the upward extension of the frame body above the third connection hole. Fourth connection holes are provided on the extension beam. Fasteners are installed in the fourth connection holes and are connected to the charging box.

[0012] Preferably, fifth connection holes are provided on the upper side of the bracket connection part. Fasteners are installed in the fifth connection holes and are connected to the battery skin.

[0013] Preferably, a bracket is installed at the bottom of the frame body. A battery is installed on the upper side of the bracket. Sixth connection holes are provided on the beam body at the bottom of the frame body. Fasteners are installed in the sixth connection holes and are connected to the bracket.

[0014] Preferably, the extension beam is also connected to the frame body through an inclined beam.

[0015] A commercial vehicle includes the battery bracket described above, and also includes a vehicle frame. A roof beam is installed on the vehicle frame, and the roof beam is perpendicular to the driving direction of the commercial vehicle. The battery bracket is vertically installed on the lower side of the roof beam. A bottom beam is installed between the battery brackets, and the battery is installed on the bottom beam.

[0016] Beneficial effects: By changing the structure of the battery bracket, a structure directly connected to the side guard plate, battery skin, and charging box is installed on the frame of the battery bracket. At the same time, a roof beam connected to the vehicle frame is installed on the battery bracket, and a working platform is also installed on the top of the battery bracket, enabling the battery bracket to bear the ability to connect different parts, saving the volume required for installing other brackets, being able to install a larger-capacity battery. At the same time, diagonal ribs are installed inside the frame, forming two groups of triangles on both sides of the diagonal ribs inside the frame, making the structure of the battery bracket more stable, enhancing the strength of the battery bracket, and thus reducing the vehicle weight of the commercial vehicle and increasing the rated load of the commercial vehicle. Description of the Drawings

[0017] Figure 1 is the front view of the battery bracket of the present invention;

[0018] Figure 2 is the main view of the battery bracket of the present invention.

[0019] In the figure: 1. Frame; 11. Diagonal rib; 12. Vertical rib; 13. First connection hole; 14. Second connection hole; 15. Third connection hole; 16. Fourth connection hole; 17. Fifth connection hole; 18. Sixth connection hole; 19. Extension beam; 110. Diagonal beam. Detailed Embodiments

[0020] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0021] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0023] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] Under the prior art, the function of the battery bracket is relatively single, and it can only fix a single battery. For the accessories installed around the battery, such as the guard plate, working platform or charging component, the above-mentioned peripheral components are all fixed around the vehicle battery through mounting brackets. However, the corresponding brackets will occupy the original space of the battery, resulting in limited battery space, affecting the battery capacity. At the same time, the large number of mounting brackets will also increase the vehicle weight; components such as the battery working platform, thermal management system pipeline, and high-voltage distribution unit are all connected to the vehicle body through independent brackets. The scattered layout of the functional components makes the reserved space around the battery pack exceed 150 mm, severely compressing the available installation volume and reducing the battery capacity. Secondly, the superimposed bracket structure makes the weight ratio of the non-load-bearing parts as high as 21%. In a case of a 6×4 tractor, the total weight of only the accessory brackets reaches 187 kg, resulting in an overweight vehicle, thereby reducing the load capacity of commercial vehicles and increasing the operating cost. Finally, the multi-stage installation structure weakens the overall rigidity, and a relative displacement of 0.5 - 1.2 mm occurs between different subsystems under the torsional condition, accelerating the fatigue failure of the connecting parts. To compensate for the strength loss, some manufacturers adopt the scheme of increasing the cross-sectional area of the brackets. For example, the wall thickness of the longitudinal beam is increased from 2.5 mm to 4 mm. Although this increases the structural stiffness by 40%, it leads to a 23% increase in the system weight. For every 100 kg increase in the vehicle curb weight, the NEDC cruising range decreases by about 2.7%.

[0025] To solve the above problems, as Figures 1 to 2As shown, the present invention provides a battery holder, which includes a frame 1, which is rectangular and vertically installed on the side of the battery, and oblique ribs 11 are connected to the diagonal directions in the frame 1. A suspension mounting portion is arranged at the corners of the frame 1, and a vertical rib 12 is formed on the suspension mounting portion. A circular hole is opened on the vertical rib 12, and the circular hole is connected to the top beam through a fastener. Battery holders are installed at both ends of the top beam, and the frame 1 is connected to a bracket plate, and the bracket plate is installed on one side of the battery. The top of the frame 1 is connected to a working platform, and the working platform is installed on the upper side of the battery. A mounting platform is also protrudingly provided on one side of the convex rib 12, and a mounting hole is opened on the mounting platform. The mounting platform is stepped to reduce weight, and the battery holder can be further connected to the battery or connected to the top beam through the mounting hole. The frame 1 is also connected to the side protection plate, the battery skin, and the charging box. The frame 1 is integrally formed, and the frame 1 is divided by the oblique rib 11 to form a hollow structure, which can reduce the weight of the battery holder and increase the load of the commercial vehicle.

[0026] The present invention is mainly applied to mountain-shaped batteries, two groups of through grooves are formed on the top of the battery, and the through grooves are perpendicular to the driving direction of the vehicle. Two groups of battery brackets are installed on both sides of the battery in the driving direction of the vehicle, and the two groups of battery brackets on the same side are connected by a bracket plate. A bottom beam is installed on the lower side of the battery bracket, and the battery is placed on the bottom beam to fix and install the battery. The spacing between the batteries on both sides can be adjusted. At the same time, since no limiting device is installed at the position along the driving direction of the commercial vehicle, the length and width of the battery volume can be freely adjusted, and the wheelbase of vehicles of different models can be adapted. Different batteries with different capacities can also be installed on the same commercial vehicle. The frame 1 of the present invention is rectangular, and oblique ribs 11 are installed in the diagonal direction of the frame 1, so that the rectangle in the frame 1 is divided into two groups of triangles. It can be deduced from the laws of physics that the triangle has stability, so that the battery bracket of the present invention can maintain its own shape under the harsh working conditions of the commercial vehicle without deformation. It should be particularly noted that all structures of the battery bracket on the present invention can be processed in the form of one-piece molding, so that the structure of the battery bracket is more stable and can adapt to different working conditions.

[0027] The frame 1 of the present invention is equipped with side protection plates, battery covers and charging boxes, which saves the brackets of the corresponding parts. The side protection plates, battery covers and charging boxes are directly integrated into the frame 1, so that the remaining space at the bottom of the commercial vehicle is larger, the weight of the vehicle can be reduced, and batteries with larger capacity and volume can be installed, which makes the commercial vehicle have a longer endurance.

[0028] A suspension mounting part is formed at the top of the frame mounting position. Two groups of protrusions are formed on the suspension mounting part. A disc is installed between the protrusions. The disc is connected to the top beam of the vehicle. The top beam penetrates through the through groove of the battery and is fixed by using the space inside the battery, reducing the space occupied by the overall battery. A positioning groove is also installed between the two vertical ribs 12. The disc can be directly inserted into the positioning groove to achieve quick fixation, shorten the installation time, and improve the processing efficiency of the battery.

[0029] It should be specifically noted that the battery bracket of the present invention can be adjusted according to batteries of different shapes and is not limited to the battery structure with a mountain-shaped cross-section.

[0030] The cross-section of the inclined rib 11 of the present invention is T-shaped and perpendicular to the plane projection of the frame body 1. The inclined rib 11 is arc-shaped and bends on the side in the direction of force, which can make the force-bearing degree of the battery bracket higher and can withstand greater external forces.

[0031] A working platform is integrated on the upper side of the battery bracket of the present invention. The frame body 1 is vertically installed on both sides of the battery. Four groups of first connection holes 13 are opened on the beam body on the upper side of the frame body 1. Fasteners are installed in the first connection holes 13 and are connected to the working platform. Usually, screw holes are provided on the side of the working platform. The fasteners are usually screws or bolts. The fasteners pass through the first connection holes 13 on the beam body and are screwed onto the working platform, enabling the working platform to be directly integrated on the battery bracket, reducing the parts for fixing the working platform, and increasing the space around the battery.

[0032] A bracket connection part is installed on the vertical beam body on one side of the frame body 1. The bracket connection part is triangular. Three groups of second connection holes 14 are opened on the bracket connection part. Fasteners are installed in the second connection holes 14 and are connected to the bracket plate. The two sides of the bracket plate are respectively connected to the frame body 1. The cross-section of the frame body 1 on one side of the bracket connection part is also T-shaped, improving the structural strength of the battery bracket. At the same time, according to different force-bearing positions, the thickness of different frame bodies 1 can be adjusted, making the frame body 1 thicker at the position with greater force and thinner at the position with smaller force.

[0033] The bracket plate connects the battery brackets on the same side. The three groups of second connection holes 14 on the bracket plate are distributed in a triangle. Among them, the second connection holes 14 are connected by auxiliary beams, and the rest is in a hollow state, which can reduce the weight of the bracket connection part and lower the overall weight of the battery bracket.

[0034] On the frame body 1 away from the bracket connecting part, a third connecting hole 15 is provided. A fastener is installed in the third connecting hole 15, and the fastener is connected to the side protection plate. The third connecting hole 15 is installed on the frame body 1 on the side opposite to the bracket connecting part. The side protection plate can be fixed through the fastener in the third connecting hole 15, making the integration around the battery higher, and all parts are fixed on the battery bracket.

[0035] Above the third connecting hole 15, the frame body 1 extends upward to form an extension beam 19. A fourth connecting hole 16 is provided in the extension beam 19. A fastener is installed in the fourth connecting hole 16, and the fastener is connected to the charging box. The extension beam 19 is also connected to the frame body 1 through an inclined beam 110. The extension beam 19 can be connected to the charging box through the fastener, and the charging box can be installed through the fastener in the fourth connecting hole 16 therein. At the end of the extension beam 19, it is also secondarily connected to the frame body 1 through the inclined beam 110. The inclined beam 110, the extension beam 19 and the frame body 1 enclose a triangle. By using the stability of the triangle, the extension beam 19 can be installed more stably on the frame body 1 of the battery bracket.

[0036] Above the bracket connecting part, a fifth connecting hole 17 is provided. A fastener is installed in the fifth connecting hole 17, and the fastener is connected to the battery skin. Through the fastener in the fifth connecting hole 17 on the bracket connecting part, it can be directly connected to the battery to further fix the battery and make the battery more stable during movement.

[0037] Between the four groups of battery brackets, a bracket is lapped at the bottom of the frame body 1. A battery is installed on the upper side of the bracket. A sixth connecting hole 18 is provided in the beam body at the bottom of the frame body 1. A fastener is installed in the sixth connecting hole 18, and the fastener is connected to the bracket. The battery is supported by the bracket. A positioning hole is also provided at the bottom of the frame body 1, which is convenient for fixing and installing through the positioning pin of the battery, making the installation process of the battery more convenient. The beam body at the bottom of the frame body 1 is cross-shaped. Since the weight of the battery is all transmitted to the bottom frame body 1 through the bracket, the cross-shaped frame body 1 can bear a greater weight, thereby avoiding deformation of the battery bracket. At the same time, the thickness is increased at the position of the sixth connecting hole 18 to further improve the strength of the battery bracket.

[0038] A commercial vehicle includes a vehicle frame. Along the vertical direction of the vehicle driving direction, a top beam is installed at the rear side of the vehicle frame. The top beam is perpendicular to the driving direction of the commercial vehicle. A battery bracket is vertically installed under the top beam. A bottom beam is installed between the battery brackets. The battery is installed on the bottom beam. Through the above arrangement, a variety of parts other than the battery can be integrally installed on the battery bracket, which can further reduce the self-weight of the vehicle, and at the same time can increase the load capacity of the vehicle and further improve the operation efficiency.

[0039] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A battery bracket, characterized in that: The invention comprises a frame (1), wherein the frame (1) is rectangular and vertically mounted on the side of the battery, wherein diagonal ribs (11) are connected in diagonal directions in the frame (1), wherein a suspension mounting portion is arranged at the corner of the frame (1), wherein a vertical rib (12) is formed on a protrusion on the suspension mounting portion, wherein the vertical rib (12) is connected to a top beam, wherein the battery bracket is mounted at both ends of the top beam, wherein the frame (1) is connected to a bracket plate, wherein the bracket plate is mounted on one side of the battery, wherein the top of the frame (1) is connected to a working platform, wherein the working platform is mounted on the upper side of the battery, and wherein the frame (1) is also connected to a side protective plate, a battery cover and a charging box.

2. The battery holder according to claim 1, characterized in that: The cross section of the oblique rib (11) is T-shaped, and when projected perpendicularly to the plane where the frame (1) is located, the oblique rib (11) is arc-shaped.

3. The battery holder according to claim 1, characterized in that: The frame (1) is vertically mounted on both sides of the battery, and the beam body on the upper side of the frame (1) is provided with four groups of first connection holes (13), fasteners are mounted in the first connection holes (13), and the fasteners are connected to the working platform.

4. The battery holder according to claim 1, characterized in that: A bracket connecting portion is installed on a vertical beam body on one side of the frame body (1), the bracket connecting portion is triangular, and three groups of second connecting holes (14) are opened on the bracket connecting portion. Fasteners are installed in the second connecting holes (14), and the fasteners are connected to the bracket plate. The two sides of the bracket plate are respectively connected to the frame body (1).

5. The battery holder according to claim 4, characterized in that: A third connection hole (15) is provided on the frame (1) away from the bracket connection portion, a fastener is installed in the third connection hole (15), and the fastener is connected to the side protection plate.

6. The battery holder according to claim 5, characterized in that: The frame (1) on the upper side of the third connection hole (15) extends upward to form an extension beam (19), and a fourth connection hole (16) is opened on the extension beam (19). A fastener is installed in the fourth connection hole (16), and the fastener is connected to the charging box.

7. The battery holder according to claim 4, characterized in that: A fifth connection hole (17) is provided on the upper side of the bracket connection portion, a fastener is installed in the fifth connection hole (17), and the fastener is connected to the battery cover.

8. The battery holder according to claim 4, characterized in that: A bracket is installed at the bottom of the frame (1), a battery is installed on the upper side of the bracket, a sixth connection hole (18) is opened on the beam body at the bottom of the frame (1), a fastener is installed in the sixth connection hole (18), and the fastener is connected to the bracket.

9. The battery holder according to claim 6, characterized in that: The extension beam (19) is also connected to the frame (1) via an inclined beam (110).

10. A commercial vehicle, characterized in that: It includes the battery bracket as described in claim 1, and also includes a frame, the top beam is installed on the frame, the top beam is perpendicular to the driving direction of the commercial vehicle, the battery bracket is vertically installed on the lower side of the top beam, a bottom beam is installed between the battery brackets, and the battery is installed on the bottom beam.

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