Middle-position type truss structure electric vehicle facilitating replacement and maintenance of battery pack

Abstract

The middle-position type truss structure electric vehicle facilitating replacement and maintenance of the battery pack comprises a vehicle body and a truss structure supporting the vehicle body, the truss structure comprises a first side and a second side which are mutually symmetrical and balanced, and battery bins are at least symmetrically distributed on the first side and the second side; according to the provided middle-position type truss structure electric vehicle facilitating replacement and maintenance of the battery packs, the battery bins are at least symmetrically distributed on the first side and the second side, and it means that the battery packs are not installed at the vehicle bottom but located on the two sides of the vehicle; the truss structure allows the battery compartment to drive the battery pack to enter or exit along the horizontal direction, which means that the worker does not need to bear the weight of the battery pack and does not need to operate in a narrow space, the battery compartment is arranged in the truss structure, and the battery pack is arranged in the battery compartment; the battery bin drives the battery pack to enter or exit the truss structure in the horizontal direction.

Description

Technical Field

[0001] The present application relates to the field of electric vehicles, and in particular to an electric vehicle with a mid-position truss structure that facilitates battery pack replacement and maintenance. Background Art

[0002] Existing new energy trucks use single-module large-module batteries, typically located under the vehicle. When replacing a battery, a robotic arm lifts it from the bottom of the vehicle and replaces it. This location is because traditional large-module batteries are large, monolithic battery packs that require ample space under the vehicle. The corresponding fully automated replacement stations, while highly automated, are also extremely expensive, making them impractical in practice. To reduce the cost of replacement stations, the automation level must be reduced. Ideally, manual battery replacement would be required to reduce the equipment's capital costs. However, with traditional battery placement, manual vertical removal of the battery is extremely difficult. Firstly, due to the limited space under the vehicle, workers must crawl under the vehicle to assemble or remove the battery. This awkward working position itself creates difficulties. Furthermore, the heavy weight of the battery requires workers to support the weight while replacing it vertically, increasing their workload.

[0003] In some existing designs, there has been a practice of evenly designing batteries on both sides of the vehicle and removing the batteries by side removal. This method does not require workers to bear the weight of the batteries when manually removing the batteries, and the even distribution of the batteries on both sides of the beam can evenly distribute the weight of the batteries on both sides of the beam, avoiding excessive force on the beam and reducing the overall service life. However, with the development of electric vehicle batteries, more and more types of electric vehicle batteries have begun to appear on the market. These different types of batteries are efficient in specific usage environments. Therefore, in order to make electric vehicles efficient in different usage scenarios, installing multiple battery packs on electric vehicles and multiple different batteries has become a practical method. However, as the number of batteries on the vehicle increases, the burden on the beam becomes greater and greater. Traditional beams cannot support multiple battery packs, thereby reducing the service life of the beam. The beam is the part that supports the weight of the entire vehicle. Therefore, as the number of batteries on the vehicle increases, the service life of the vehicle will be reduced.

[0004] To this end, it is necessary to design a truss structure with strong supporting capacity to replace the vehicle's beam to bear the weight of the battery, which is convenient for battery pack replacement and maintenance to solve the above problems. Utility Model Content

[0005] In view of this, it is necessary to provide a mid-position truss structure electric vehicle that is convenient for battery pack replacement and maintenance to solve the above problems.

[0006] An embodiment of the present application provides a mid-position truss structure electric vehicle that facilitates battery pack replacement and maintenance, comprising a vehicle body and a truss structure supporting the vehicle body, wherein the truss structure has a first side and a second side that are symmetrically balanced with each other;

[0007] The battery compartments are at least symmetrically distributed on the first side and the second side, and the truss structure allows the battery compartments to drive the battery packs to enter or exit the truss structure in a horizontal direction.

[0008] In at least one embodiment of the present application, the plurality of battery compartments are electrically connected and connected in parallel.

[0009] In at least one embodiment of the present application, the truss structure further comprises: a front side and a rear side disposed opposite to each other;

[0010] When the number of battery packs is an odd number, at least one odd number of battery packs is disposed in the battery compartment on the front side or the rear side.

[0011] In at least one embodiment of the present application, when the number of battery packs is an even number, the battery packs are evenly distributed in the battery compartments on the first side and the second side.

[0012] In at least one embodiment of the present application, the battery pack is a combination of one or more power sources selected from lithium iron phosphate, sodium battery, or solid-state battery.

[0013] In at least one embodiment of the present application, when the battery pack is a combination of multiple power sources such as lithium iron phosphate, sodium battery or solid-state battery, battery packs with the same power source are symmetrically arranged in the battery compartments on the first side and the second side.

[0014] In at least one embodiment of the present application, battery packs of different power sources are mounted in the battery compartments on the first and second sides according to different weight combinations, and the weight of the battery pack configured in the battery compartment on the first side is recorded as T1, and the weight of the battery pack in the battery compartment on the second side is recorded as T2, satisfying the relationship:

[0015] 0≤T1-T2≤0.1(T1+T2).

[0016] In at least one embodiment of the present application, the battery compartment is equipped with a charging and discharging interface, allowing the battery pack in the battery compartment to be directly charged and discharged.

[0017] In at least one embodiment of the present application, the truss structure further comprises:

[0018] A median truss supports the vehicle body, wherein the first side and the second side are symmetrically and balancedly distributed on left and right sides of the median truss;

[0019] The battery pack enters or exits the battery compartment from the outside to the inside from one end of the first side away from the mid-position truss, or enters or exits the battery compartment from the outside to the inside from one end of the second side away from the mid-position truss.

[0020] In at least one embodiment of the present application, the battery compartments are stacked in a vertical direction, and the battery compartments on the first side and the second side are stacked in the same number and are symmetrically balanced with each other.

[0021] The aforementioned mid-position truss structure electric vehicle facilitates battery pack replacement and maintenance. The battery compartments are symmetrically located on at least the first and second sides of the vehicle, meaning the battery packs are not mounted on the bottom of the vehicle but on both sides, making them easier for operators to access. The compartments allow the packs to enter and exit horizontally, meaning operators do not need to bear the weight of the battery packs or operate in confined spaces. They can easily replace the battery packs by sliding, pushing, pulling, or other mechanically assisted methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Exploded view of the mid-position truss structure electric vehicle for easy battery pack replacement and maintenance;

[0023] Figure 2 Bottom view of an electric vehicle with a mid-position truss structure for easy battery pack replacement and maintenance;

[0024] Figure 3 A three-dimensional diagram of the structure behind the mid-position truss structure electric vehicle is hidden to facilitate battery pack replacement and maintenance;

[0025] Figure 4 A three-dimensional diagram of the structure behind the mid-position truss structure electric vehicle is hidden to facilitate battery pack replacement and maintenance;

[0026] Figure 5 The exploded view of the structure behind the mid-position truss structure electric vehicle is hidden to facilitate battery pack replacement and maintenance;

[0027] Figure 6 The test image of the mid-position truss structure electric vehicle with the body hidden to facilitate battery pack replacement and maintenance;

[0028] Figure 7 for Figure 6 The cross-sectional view at AA;

[0029] Figure 8 It is the side view of the truss structure;

[0030] Figure 9 for Figure 8 Cross-sectional view at BB;

[0031] Figure 10A three-dimensional diagram of the structure of an electric vehicle with a mid-position truss structure to facilitate battery pack replacement and maintenance.

[0032] Description of main component symbols

[0033] 100. Electric vehicle with a mid-position truss structure for easy replacement and maintenance of battery packs; 1. Vehicle body; 2. Truss structure; 21. First side; 22. Second side; 23. Front side; 24. Rear side; 25. Mid-position truss; 3. Battery compartment; 31. Charging and discharging interface; 4. Battery pack. DETAILED DESCRIPTION

[0034] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0035] It should be noted that when a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0036] An embodiment of the present application provides a mid-position truss structure electric vehicle that facilitates battery pack replacement and maintenance, comprising a vehicle body and a truss structure supporting the vehicle body, wherein the truss structure has a first side and a second side that are symmetrically balanced with each other;

[0037] The battery compartments are symmetrically located on at least the first and second sides, and the truss structure allows the battery compartments to carry the battery packs horizontally into or out of the truss structure. The above-mentioned mid-position truss structure electric vehicle, which facilitates battery pack replacement and maintenance, has battery compartments symmetrically located on at least the first and second sides. This means that the battery packs are not installed under the vehicle, but are located on both sides of the vehicle, making it easier for workers to operate. The battery compartments allow the battery packs to enter or exit horizontally, meaning that workers do not need to bear the weight of the battery packs or operate in a small space. They can easily replace the battery packs by sliding, pushing, pulling, or other mechanically assisted methods.

[0038] The following embodiments of the present application are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0039] See also Figures 1-10An embodiment of the present application provides a mid-position truss structure electric vehicle 100 that is convenient for battery pack replacement and maintenance, including a vehicle body 1 and a truss structure 2 supporting the vehicle body 1, the truss structure 2 having a first side 21 and a first side 22 that are symmetrically balanced with each other, the battery compartment 3 being symmetrically distributed on at least the first side 21 and the first side 22, and the truss structure 2 allowing the battery compartment 3 to drive the battery pack 4 to enter or exit the truss structure 2 in a horizontal direction.

[0040] Specifically, the truss structure 2, as the main supporting structure of the electric vehicle, not only provides sufficient strength and stability, but also provides space for the installation of the battery compartment 3. Compared with the traditional method of installing batteries under the vehicle, the design of the truss structure 2 makes the installation position of the battery pack 4 higher, which is convenient for the staff to operate and reduces the work intensity. The truss structure 2 includes a first side 21 and a first side 22 that are symmetrically balanced with each other. This symmetrical and balanced design ensures the stability and balance of the electric vehicle during driving and avoids the problem of vehicle imbalance caused by uneven battery distribution. It improves the safety and driving stability of the electric vehicle and extends the service life of the vehicle. The battery compartment 3 is at least symmetrically distributed on the first side 21 and the first side 22, and allows the battery compartment 3 to drive the battery pack 4 to enter or exit the truss structure 2 in the horizontal direction. This means that the design of the battery compartment 3 and the battery pack 4 allows them to be easily installed in or removed from the truss structure 2 in the horizontal direction (relative to the ground). The setting of the battery compartment 3 allows the battery pack 4 to be easily replaced in the horizontal direction without the need for workers to climb under the vehicle or bear the weight of the battery pack 4, which simplifies the replacement process, reduces work intensity, improves work efficiency, and avoids safety hazards caused by replacing the battery pack 4. The number and type of battery packs 4 can be flexibly configured as needed to meet different usage requirements.

[0041] In one embodiment, the plurality of battery compartments 3 are electrically connected to each other and are connected in parallel.

[0042] Specifically, this means that in the electric vehicle's power system, each battery compartment 3 is not isolated, but is interconnected via cables, connectors, or other electrical components to form an integrated power network. This connection ensures that the electric vehicle can obtain power from one or more battery compartments 3 to support its normal operation. Parallel connection is a circuit connection method in which the positive poles of multiple power sources (in this case, battery packs 4) are connected to each other, and the negative poles are connected to each other. In a parallel circuit, each power source independently provides current to the circuit, and the voltages between the power sources are equal. When multiple battery compartments 3 are connected in parallel, the battery packs 4 in them will collectively provide power to the electric vehicle. This means that if the power of one battery pack 4 is exhausted, the other battery packs 4 can still continue to provide power, thereby improving the electric vehicle's endurance and reliability. By connecting the battery packs 4 in multiple battery compartments 3 in parallel, the electric vehicle can obtain more power, thereby extending its driving range. In a parallel circuit, even if a battery pack 4 fails or runs out of power, the other battery packs 4 can still continue to operate, ensuring the continued operation of the electric vehicle.

[0043] In a specific example, the truss structure 2 further includes: a front side 23 and a rear side 24 disposed opposite to each other;

[0044] When the number of battery packs 4 is odd, at least one odd-numbered battery pack 4 is disposed in the battery compartment 3 on the front side 23 or the rear side 24 .

[0045] Specifically, these two sides are relative to the direction of travel of the electric vehicle. The front side 23 generally points to the front of the electric vehicle, while the rear side 24 points to the rear. In the truss structure 2, the front side 23 and the rear side 24, together with the first side 21 and the first side 22, form a three-dimensional support frame, providing a stable installation platform for the battery compartment 3 and other vehicle components. In some cases, electric vehicles may need to be configured with an odd number of battery packs 4 to meet specific endurance requirements or weight distribution requirements. When the number of battery packs 4 is odd, how to reasonably distribute these battery packs 4 becomes a problem that needs to be solved. In order to solve the distribution problem of odd-numbered battery packs 4, the present invention proposes a strategy: at least one odd-numbered battery pack 4 is configured in the battery compartment 3 on the front side 23 or rear side 24 of the truss structure 2. This configuration ensures the uniform distribution of the battery packs 4 in the truss structure 2, avoiding the problem of vehicle imbalance caused by the uneven number of battery packs 4. At the same time, because the front side 23 and the rear side 24 are perpendicular to the first side 21 and the first side 22, this configuration also helps improve the space utilization of the battery packs 4 in the vehicle. When the number of battery packs 4 is odd, one or more battery packs 4 can be flexibly configured in the battery compartments 3 on the front side 23 or rear side 24, depending on factors such as the vehicle's range requirements, weight distribution requirements, and the capacity of the battery compartments 3. For example, if the vehicle requires additional range, more battery packs 4 can be configured in the battery compartments 3 on the front side 23 or rear side 24; if the vehicle's weight distribution is a concern, the battery packs 4 can be evenly distributed in the battery compartments 3 on all four sides.

[0046] In a specific example, when the number of the battery packs 4 is even, the battery packs 4 are evenly distributed to the battery compartments 3 on the first side 21 and the first side 22 .

[0047] Specifically, when an electric vehicle requires an even number of battery packs 4, the key issue is how to properly distribute these battery packs 4 among the battery compartments 3. The distribution of an even number of battery packs 4 is relatively simple and intuitive, as they can be easily divided evenly between two symmetrical sides. In this case, the battery packs 4 are evenly distributed among the battery compartments 3 on the first side 21 and the first side 22 of the truss structure 2. Assuming there are four battery packs 4, two battery packs 4 can be placed on the first side 21 and two on the first side 22. This distribution ensures an even distribution of the battery packs 4 within the truss structure 2, helping to maintain the vehicle's balance and stability. First, the total number of battery packs 4 required for the electric vehicle must be determined and ensured to be an even number. Next, based on the number and size of the battery packs 4, as well as the capacity and layout of the battery compartments 3 within the truss structure 2, appropriate battery compartments 3 are selected to accommodate the battery packs 4. The battery packs 4 are then evenly distributed among the battery compartments 3 on the first side 21 and the first side 22. This can be achieved by calculating the number of battery packs 4 required on each side. Finally, the battery pack 4 is installed into the selected battery compartment 3 and fixed in place using appropriate fixing devices. By evenly distributing the battery packs 4 to the first side 21 and the first side 22 of the truss structure 2, the stability and balance of the vehicle can be ensured during driving.

[0048] In a specific example, the battery pack 4 is a combination of one or more power sources selected from lithium iron phosphate, sodium battery, or solid-state battery.

[0049] Specifically, in the design of electric vehicles or related energy storage devices, the battery pack 4 plays a crucial role as the energy storage unit. Different battery technologies have different characteristics and advantages, suitable for different application scenarios and requirements. Therefore, when designing and selecting the battery pack 4, multiple factors need to be considered, including energy density, safety, cost, cycle life, and environmental impact. Lithium iron phosphate batteries are a widely used type of lithium-ion battery, known for their high safety, long life, and relatively low cost. They have high thermal and chemical stability and are not prone to fire or explosion even under high temperature or overcharge conditions. In addition, lithium iron phosphate batteries have a long cycle life and can withstand a large number of charge and discharge cycles without performance degradation. However, their relatively low energy density limits their use in some applications requiring high energy output. Sodium batteries are an emerging battery technology similar to lithium-ion batteries, but use sodium ions instead of lithium ions as charge carriers. Sodium batteries have the potential to be raw material-abundant and low-cost because sodium is a common element on Earth and more readily available than lithium. Furthermore, sodium batteries perform better at low temperatures than some lithium-ion batteries, making them attractive for use in cold climates. However, sodium batteries are still in the developmental stage, and their performance metrics, such as energy density and cycle life, require further improvement. Solid-state batteries are an advanced battery technology whose electrolyte is solid rather than liquid. Solid-state batteries offer higher energy density, longer cycle life, and improved safety because the solid electrolyte reduces the risk of internal short circuits. Furthermore, solid-state batteries have a wider operating temperature range and can maintain stable performance under extreme conditions. However, solid-state batteries currently face technical challenges and cost issues, and their commercialization is still in its early stages. To meet higher performance requirements or maximize cost-effectiveness, electric vehicles may use a combination of multiple battery types as a power source. For example, lithium iron phosphate batteries can be combined with sodium batteries to leverage the high safety and long life of lithium iron phosphate batteries while reducing overall costs. Another combination approach is to combine solid-state batteries with existing technologies, such as lithium iron phosphate batteries, to improve energy density and safety. When combining multiple power sources, the design and integration of the battery management system (BMS) needs to be considered to ensure compatibility and optimize performance between the different battery types.

[0050] In a specific example, when the battery pack 4 is a combination of multiple power sources such as lithium iron phosphate, sodium battery or solid-state battery, the battery packs 4 with the same power source are symmetrically arranged in the battery compartments 3 on the first side 21 and the first side 22 .

[0051] Specifically, lithium iron phosphate batteries are the mainstream choice for new energy vehicles at this stage. Their advantages include high energy density, small size, light weight, high charging efficiency, and good safety. They are usually composed of multiple single cells connected in series and parallel to form a battery pack, which is further assembled into a battery pack4. Sodium ion batteries are secondary batteries that mainly rely on the movement of sodium ions between the positive and negative electrodes to operate. Compared with lithium ion batteries, sodium ion batteries have advantages in resource abundance and cost, but still need to be improved in energy density and cycle life. Solid-state batteries are batteries that use solid electrolytes instead of liquid electrolytes. Solid-state batteries have higher safety, longer cycle life, and higher energy density potential, but are still in the research and development and small-scale application stage. In new energy vehicles or energy storage systems, a combination of multiple power sources may be used to improve performance, reduce costs, or meet specific needs. For example, lithium iron phosphate batteries can be combined with sodium ion batteries or solid-state batteries to fully utilize the advantages of each. When using multiple power source combinations, to ensure system balance and stability, battery packs 4 from the same power source are typically symmetrically positioned within the battery compartments 3 on the first side 21 and the first side 22. This configuration helps reduce system imbalance and improve overall performance. A symmetrical configuration can reduce system imbalance and mitigate system fluctuations caused by differences in battery pack 4 performance.

[0052] In one specific example, battery packs 4 of different power sources are mounted in the battery compartments 3 on the first side 21 and the first side 22 in different combinations according to weight. The weight of the battery pack 4 in the battery compartment 3 on the first side 21 is recorded as T1, and the weight of the battery pack 4 in the battery compartment 3 on the first side 22 is recorded as T2, satisfying the relationship:

[0053] 0≤T1-T2≤0.1(T1+T2).

[0054] Specifically, this refers to the fact that the battery pack 4 may utilize different battery types or technologies, such as lithium iron phosphate batteries, sodium ion batteries, and solid-state batteries. These different types of battery packs 4 may have different characteristics, such as weight, energy density, cost, and safety performance. This means that when configuring the battery packs 4, their weight differences are taken into consideration and the combination and layout are determined accordingly. The goal is to maintain system balance and stability while meeting performance requirements. This refers to the spaces or areas on both sides of a new energy vehicle or energy storage system for mounting the battery packs 4. These may be located at different locations, such as the bottom, side, or top of the vehicle. They represent the total weight of the battery packs 4 configured in the battery compartment 3 on the first side 21 and the total weight of the battery packs 4 configured in the battery compartment 3 on the first side 22, respectively. The weight balance relationship 0≤T1-T2≤0.1(T1+T2) is an important mathematical relationship used to describe the weight balance of the battery packs 4 in the battery compartments 3 on both sides. 0≤T1-T2 indicates that the weight T1 of the battery pack 4 in the battery compartment 3 on the first side 21 is not less than the weight T2 of the battery pack 4 in the battery compartment 3 on the first side 22. This means that the first side 21 is allowed to be heavier than the first side 22, but negative values ​​are not allowed (i.e., the first side 22 cannot be heavier than the first side 21 by a negative amount). T1-T2≤0.1(T1+T2) means that the difference in weight of the battery packs 4 in the battery compartments 3 on both sides should not exceed 10% of their total weight. This is a relatively loose restriction, intended to ensure that the system maintains a certain balance in weight distribution, thereby avoiding performance degradation or safety issues caused by weight imbalance. By ensuring the balance of the weight of the battery packs 4 in the battery compartments 3 on both sides, the risk of vehicle rollover, unstable driving, etc. caused by uneven weight distribution can be reduced. Weight balance helps to improve the handling and acceleration performance of the vehicle, because unbalanced weight distribution may increase the rolling resistance and air resistance of the vehicle.

[0055] In a specific example, the battery compartment 3 is equipped with a charge and discharge interface 31 , allowing the battery pack 4 in the battery compartment 3 to be directly charged and discharged.

[0056] Specifically, in a new energy vehicle or energy storage system, the battery compartment 3 is a component or space specifically used to install, fix and protect the battery pack 4. It is usually designed with a sturdy shell and internal support structure to ensure that the battery pack 4 remains stable and safe when the vehicle is driving or the system is running. The main function of the battery compartment 3 is to provide a safe and reliable environment for storing the battery pack 4 and to connect the battery pack 4 to other parts of the vehicle's electric drive system or energy storage system through electrical connections. This is a key component on the battery compartment 3, which allows an external power source or load to establish an electrical connection with the battery pack 4 in the battery compartment 3. The charge and discharge interface 31 usually includes components such as a connecting plug, a socket, a communication line and a protective device. When the battery pack 4 needs to be charged, an external power source (such as a charging pile, a household power supply, etc.) is connected to the battery pack 4 through the charge and discharge interface 31, and electrical energy is transferred to the battery pack 4 to replenish its energy. When the battery pack 4 needs to power the new energy vehicle or supply power to the energy storage system, the battery pack 4 outputs electrical energy to other parts of the electric drive system or energy storage system through the charge and discharge interface 31. Through the charge and discharge interface 31 on the battery compartment 3, the user can conveniently and directly charge and discharge the battery pack 4 without having to disassemble the battery pack 4 or perform complicated connection settings. The charge and discharge interface 31 is usually designed with protection devices, such as overcurrent protection, overvoltage protection, short circuit protection, etc., to ensure the safety of the battery pack 4 during the charging and discharging process. Charging and discharging directly through the charge and discharge interface 31 can reduce the loss during energy transmission and improve the overall efficiency of the system. In new energy vehicles, the charge and discharge interface 31 of the battery compartment 3 allows the vehicle to be connected to an external charging pile for fast charging or slow charging operations. At the same time, during the driving of the vehicle, the battery pack 4 provides electrical energy to the vehicle's electric drive system through the charge and discharge interface 31.

[0057] In a specific example, the truss structure 2 further includes:

[0058] A middle truss 25 supports the vehicle body 1 , wherein the first side 21 and the first side 22 are symmetrically and balancedly distributed on the left and right sides of the middle truss 25 ;

[0059] The battery pack 4 enters or exits the battery compartment 3 from the outside to the inside from the end of the first side 21 away from the mid-position truss 25 , or enters or exits the battery compartment 3 from the outside to the inside from the end of the first side 22 away from the mid-position truss 25 .

[0060] Specifically, the truss structure 2 is a spatial structure composed of rods connected by nodes, with advantages such as high strength, light weight, and good stability. In new energy vehicles or energy storage systems, the truss structure 2 is often used to support and protect key components such as the battery pack 4, motor, and controller. The median truss 25 is a key component in the truss structure 2 and is located at the center of the entire structure. It supports the vehicle body 1 and ensures its stability and safety. Through its sturdy structure and reasonable layout, the median truss 25 evenly distributes the weight of the vehicle body 1 throughout the truss structure 2, thereby avoiding local overload and deformation. Due to the presence of the median truss 25, the first side 21 and the first side 22 (i.e., the left and right sides of the truss structure 2) can be distributed symmetrically and balanced. This balanced distribution helps reduce the risk of rollover during vehicle operation and improves the vehicle's handling and stability. The symmetrical distribution of the first side 21 and the first side 22 on the truss structure 2 means that they are balanced in terms of structural layout, weight distribution, and functional configuration. This balanced distribution helps ensure the overall performance and safety of the vehicle or energy storage system. The "left and right sides" here are relative to the median truss 25. In actual applications, the first side 21 and the first side 22 may be located on the left and right sides of the vehicle, respectively, or at different locations in the energy storage system. The battery pack 4 is a key component in new energy vehicles or energy storage systems and requires regular replacement or maintenance. Therefore, it is crucial to design a reasonable entry and exit method for the battery pack 4. The battery pack 4 enters or exits the battery compartment 3 from the end of the first side 21 or the first side 22 that is away from the median truss 25. This means that the battery pack 4 moves from the outside to the inside of the truss structure 2, rather than from the inside to the outside. This design helps to reduce the interference of the battery pack 4 on other components of the vehicle or energy storage system during replacement or maintenance. The battery pack 4 can enter or exit the battery compartment 3 from either end of the first side 21 or the first side 22. This flexibility helps to adapt to different replacement or maintenance needs and improve operational efficiency. In summary, a specific design of the truss structure 2 in a new energy vehicle or energy storage system, including the position and function of the median truss 25, the balanced distribution of the first side 21 and the first side 22, and the way the battery pack 4 enters and exits the battery compartment 3, helps to improve the overall performance, safety and operational efficiency of the vehicle or energy storage system.

[0061] In a specific example, the battery compartments 3 are stacked in a vertical direction, and the battery compartments 3 on the first side 21 and the first side 22 are stacked in the same number and are symmetrically balanced with each other.

[0062] Specifically, this means that the battery compartments 3 are stacked vertically (i.e., from top to bottom or from bottom to top). This configuration maximizes the use of the vertical space in the vehicle or energy storage system, improving the storage density and energy density of the battery packs 4. The stacking configuration generally involves the shape, size, connection method, and spatial layout of the battery compartments 3. In the case of vertical stacking, the battery compartments 3 may need to be designed as modules that are easy to install, remove, and replace, so that maintenance or upgrades can be quickly performed when necessary. This sentence indicates that the number of battery compartments 3 stacked on the first side 21 and the first side 22 is the same. This means that the two sides are balanced in terms of the storage capacity of the battery packs 4, and no side can store more battery packs 4 than the other side. The balance of the number of stacks is critical to the overall performance and safety of the vehicle or energy storage system. If the number of battery compartments 3 stacked on one side is greater than that on the other side, it may result in uneven weight distribution, affecting the vehicle's handling and stability, or leading to unbalanced operation of the energy storage system. In addition to the same number of stacks, this sentence also emphasizes that the battery compartments 3 on the first side 21 and the first side 22 are symmetrically balanced in layout. This means that the battery compartment 3 is symmetrical in position, shape, and size on both sides, ensuring the structural balance and stability of the entire system. This symmetrical and balanced configuration helps reduce vibration and noise during vehicle or energy storage system operation, improving ride comfort and operating efficiency. It also helps reduce the risk of wear and damage caused by uneven weight distribution, extending the system's service life.

[0063] The above is only an implementation method of the present application. It should be pointed out that for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present application, but these all fall within the scope of protection of the present application.

Claims

1. A mid-position truss structure electric vehicle that facilitates battery pack replacement and maintenance, characterized in that: The vehicle comprises a vehicle body and a truss structure supporting the vehicle body, wherein the truss structure has a first side and a second side that are symmetrically balanced with each other; The battery compartments are at least symmetrically distributed on the first side and the second side, and the truss structure allows the battery compartments to drive the battery packs to enter or exit the truss structure in a horizontal direction.

2. The mid-position truss structure electric vehicle that facilitates battery pack replacement and maintenance according to claim 1 is characterized in that: The plurality of battery compartments are electrically connected and connected in parallel.

3. The mid-position truss structure electric vehicle that facilitates battery pack replacement and maintenance according to claim 1 is characterized in that: The truss structure further includes: a front side and a rear side disposed opposite to each other; When the number of battery packs is an odd number, at least one odd number of battery packs is disposed in the battery compartment on the front side or the rear side.

4. The electric vehicle with a mid-position truss structure that facilitates battery pack replacement and maintenance according to claim 3 is characterized in that: When the number of battery packs is even, the battery packs are evenly distributed in the battery compartments on the first side and the second side.

5. The electric vehicle with a mid-position truss structure that facilitates battery pack replacement and maintenance according to claim 4 is characterized in that: The battery pack is a combination of one or more power sources selected from lithium iron phosphate, sodium battery or solid-state battery.

6. The electric vehicle with a mid-position truss structure that facilitates battery pack replacement and maintenance according to claim 5 is characterized in that: When the battery pack is a combination of multiple power sources such as lithium iron phosphate, sodium battery or solid-state battery, the battery packs with the same power source are symmetrically arranged in the battery compartments on the first side and the second side.

7. The electric vehicle with a mid-position truss structure that facilitates battery pack replacement and maintenance according to claim 6 is characterized in that: Battery packs of different power sources are mounted in the battery compartments on the first and second sides according to different weight combinations. The weight of the battery pack in the battery compartment on the first side is recorded as T1, and the weight of the battery pack in the battery compartment on the second side is recorded as T2, satisfying the relationship: 0≤T1-T2≤0.1(T1+T2).

8. The mid-position truss structure electric vehicle for easy battery pack replacement and maintenance according to claim 1 is characterized in that: The battery compartment is equipped with a charging and discharging interface, allowing the battery pack in the battery compartment to be directly charged and discharged.

9. The electric vehicle with a mid-position truss structure that facilitates battery pack replacement and maintenance according to claim 1 is characterized in that: The truss structure further comprises: A median truss supports the vehicle body, wherein the first side and the second side are symmetrically and balancedly distributed on left and right sides of the median truss; The battery pack enters or exits the battery compartment from the outside to the inside from one end of the first side away from the mid-position truss, or enters or exits the battery compartment from the outside to the inside from one end of the second side away from the mid-position truss.

10. The electric vehicle with a mid-position truss structure that facilitates battery pack replacement and maintenance according to claim 9 is characterized in that: The battery compartments are stacked in a vertical direction, and the battery compartments on the first side and the second side are stacked in the same number and are symmetrically balanced with each other.

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