New energy commercial vehicle middle-mounted quick-change battery assembly

Abstract

The utility model discloses a new energy commercial vehicle is with middle -position formula quick change battery assembly, the key lies in: including box, set in the battery management system component and one or more battery module of box and along the length direction of the box is sequentially set, the box cover for closing the box, the battery end connector of fixed in the front end part of box, the bracket assembly of fixed in the bottom of box and the positioning pin of fixed in the front end part of bracket assembly, the utility model has the beneficial effect that: 1, through design box contains battery management system component and battery module and design is located the bracket assembly below the box, has guaranteed the strength while promoted the space utilization, can set up the battery of greater capacity, 2, has integrated locking assembly on the bracket assembly, has promoted the compact degree of whole battery assembly.

Description

Technical Field

[0001] This utility model belongs to the field of new energy commercial vehicle technology, specifically relating to a mid-mounted fast-swap battery pack for new energy commercial vehicles. Background Technology

[0002] New energy commercial vehicles often employ a battery swapping structure, allowing for the replacement of fully charged batteries at battery swapping stations to address range anxiety. In a mid-mounted battery swapping structure, the battery pack is typically placed between two longitudinal beams of the vehicle and then swapped using a pull-out mechanism. The battery pack includes a high-voltage box, at least one battery compartment, and a connecting plate between the high-voltage box and the battery compartment. When there are two or more battery compartments, connecting plates are also installed between adjacent battery compartments for connection.

[0003] The applicant previously applied for a mid-mounted battery module for new energy commercial vehicles (authorization announcement number CN220639494U), which designs a limiting cavity in the connecting frame to limit the high-voltage box and the battery box. After the high-voltage box and the battery box are limited, they are directly fixed to the connecting frame. The structure is simple and low-cost, and can achieve rapid installation and facilitate subsequent maintenance.

[0004] The existing technology has the following technical problems: 1. The high-voltage box and the battery box adopt a split structure. When the high-voltage box and the battery box are fixed on the connecting frame, there must be a certain distance between them to facilitate the arrangement of wire harnesses and other components. This results in low space utilization, high cost of manufacturing wire harnesses, and high structural strength requirements at the junction of the two on the connecting frame; 2. The bottom of the battery box needs to be set with a support frame to connect with the connecting frame, and a sliding bracket needs to be set under the connecting frame, which increases material and labor costs and also occupies a lot of space in the height direction. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a mid-mounted fast-swap battery pack for new energy commercial vehicles. The high-voltage box and the battery box are designed as an integrated structure through the box body, which can improve space utilization and accommodate larger capacity batteries. The bracket structure is designed so that the bracket is directly connected to the bottom of the box body, which simplifies the structure and also improves the strength of the box body.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a mid-mounted fast-swap battery pack for new energy commercial vehicles, the key features of which are: a housing, a battery management system component and one or more battery modules arranged sequentially in the housing along the length of the housing, a housing cover for closing the housing, a battery end connector fixed at the front end of the housing, a bracket assembly fixed at the bottom of the housing, and a positioning pin fixed at the front end of the bracket assembly.

[0007] Furthermore, multiple reinforcing crossbeams are provided at the bottom of the box and along the length of the box.

[0008] Furthermore, the bracket assembly includes two sets of longitudinal beam assemblies arranged side by side at the bottom of the box and along the width direction of the box, multiple rollers arranged on each set of longitudinal beam assemblies, and a front end crossbeam assembly, multiple sets of intermediate crossbeam assemblies, and a rear crossbeam arranged between the two sets of longitudinal beam assemblies and along the length direction of the box.

[0009] Furthermore, the longitudinal beam assembly includes a first longitudinal beam with a ┐-shaped cross-section and a second longitudinal beam with a ┌-shaped cross-section arranged side by side, and multiple rollers are located in the gap between the first and second longitudinal beams and are arranged along the length direction of the longitudinal beam assembly.

[0010] Furthermore, the front end beam assembly includes a first inner end beam with a ┌-shaped cross section and a second inner end beam with a ┐-shaped cross section. The connecting ends of the positioning pins are fixed on the front end beam assembly and two are provided along the length direction of the front end beam assembly.

[0011] Furthermore, the intermediate crossbeam assembly includes a first intermediate crossbeam with a ┐-shaped cross-section and a second intermediate crossbeam with a ┌-shaped cross-section. Both ends of the first and second intermediate crossbeams are provided with connecting portions that pass through strip holes on the first or second longitudinal beam and connect to the second or first longitudinal beam.

[0012] Furthermore, a locking assembly is provided on the bracket assembly. The locking assembly includes a plurality of locking pin guide sleeves that are slidably limited on the longitudinal beam assembly and arranged along the length direction of the longitudinal beam assembly, a locking pin that is limited in the locking pin guide sleeves, a locking rod that is slidably limited in the locking rod guide sleeve that is fixed on the intermediate crossbeam assembly, a connecting rod whose two ends are respectively connected to the locking rod and the locking pin, and a spring that is limited between the locking rod guide sleeve and the connecting rod.

[0013] Furthermore, the locking rod is provided with a connecting assembly for connecting the connecting rod and located between two adjacent locking rod guide sleeves. The connecting assembly includes a first connecting plate, a second connecting plate, a fixing bolt that passes through the second connecting plate and the locking rod and is threadedly connected to the first connecting plate, a connecting pin that passes through one end of the second connecting plate and one end of the corresponding connecting rod and is connected to the first connecting plate.

[0014] Furthermore, a sleeve is provided on one side of the connecting assembly, which is fitted onto the locking rod and extends to the end of the locking rod guide sleeve. The spring is fitted onto the locking rod and its two ends are limited between the locking rod guide sleeve and the sleeve.

[0015] Furthermore, a push-pull plate is provided at the bottom end of the box, and a push-pull rod is provided in the groove of the push-pull plate.

[0016] The beneficial effects of this utility model are: 1. By designing a housing to accommodate the battery management system components and battery modules, and designing a bracket assembly located below the housing, the space utilization rate is improved while ensuring strength, allowing for the installation of batteries with larger capacity; it can reduce the number of connecting aviation plugs and save on wiring harness costs; 2. The locking component is integrated on the bracket assembly, which improves the compactness of the entire battery assembly while increasing the strength of the housing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front end of the mid-mounted quick-swap battery pack for new energy commercial vehicles according to this utility model. Figure 2 This is a schematic diagram of the rear end of the mid-mounted quick-swap battery pack for new energy commercial vehicles according to this utility model; Figure 3 This is a schematic diagram of the bottom structure of the mid-mounted quick-swap battery pack for new energy commercial vehicles according to this utility model; Figure 4 This is a schematic diagram of the connecting components in the mid-mounted fast-swap battery pack for new energy commercial vehicles according to this utility model; Figure 5 This is a schematic diagram of the internal structure of the housing in the mid-mounted fast-swap battery pack for new energy commercial vehicles according to this utility model. Figure 6 This is a schematic diagram of the bottom structure of the housing in the mid-mounted fast-swap battery pack for new energy commercial vehicles according to this utility model.

[0018] In the attached diagram, 1. Box body, 2. Box cover, 3. Battery end connector, 4. Positioning pin, 5. Reinforcing crossbeam, 6. Roller, 7. First longitudinal beam, 8. Second longitudinal beam, 9. First inner end crossbeam, 10. Second inner end crossbeam, 11. First intermediate crossbeam, 12. Second intermediate crossbeam, 13. Tail crossbeam, 14. Locking pin guide sleeve, 15. Locking pin, 16. Locking rod guide sleeve, 17. Locking rod, 18. Connecting rod, 19. Spring, 20. First connecting plate, 21. Second connecting plate, 22. Fixing bolt, 23. Connecting pin shaft, 24. Sleeve, 25. Push-pull plate, 26. Push-pull rod, 27. Rubber block, a. Connecting part. Detailed Implementation

[0019] See appendix Figure 1-6This utility model provides a mid-mounted quick-swap battery pack for new energy commercial vehicles, including a housing 1, a battery management system assembly and one or more battery modules arranged sequentially along the length of the housing 1, a cover 2 for closing the top opening of the housing 1, a battery end connector 3 fixed to the front end of the housing 1, a bracket assembly fixed to the bottom of the housing 1, and a positioning pin 4 fixed to the front end of the bracket assembly. By placing the battery management system assembly and battery modules in the same housing 1, space can be better utilized, avoiding the disadvantages of low space utilization and high strength requirements at the connection points of the original high-voltage box and battery box using a separate structure. The bracket assembly is located at the bottom of the housing 1, eliminating the need for the original connecting frame, support frame, and other components, which can reduce the occupied height, increase the strength of the housing 1, and maximize the height dimension of the housing 1, which is beneficial to the arrangement and installation of the components inside the housing 1.

[0020] See appendix Figure 5 Multiple reinforcing beams 5 are installed at the bottom of the enclosure 1 and along its length. A battery management system (BMS) assembly or battery module is installed between the reinforcing beams 5 and the end sidewalls of enclosure 1, or between two reinforcing beams 5. By housing the BMS assembly and battery module within a single enclosure, the use of connecting connectors can be reduced, saving on wiring harness costs. An explosion-proof valve, a manual maintenance switch, and an antenna are located at the rear end of enclosure 1.

[0021] See appendix Figure 3 , 4 The bracket assembly described above includes two sets of longitudinal beam assemblies arranged side by side at the bottom of the housing 1 and along the width direction of the housing 1, multiple rollers 6 arranged on each set of longitudinal beam assemblies, a front end crossbeam assembly arranged between the two sets of longitudinal beam assemblies and along the length direction of the housing 1, multiple sets of intermediate crossbeam assemblies, and a tail crossbeam 13 with a U-shaped cross section.

[0022] The longitudinal beam assembly includes a first longitudinal beam 7 and a second longitudinal beam 8 arranged side by side. Rollers 6 are located in the gap between the first longitudinal beam 7 and the second longitudinal beam 8 and are arranged in multiple quantities along the length of the longitudinal beam assembly. The cross-section of the first longitudinal beam 7 is ┐-shaped, and the cross-section of the second longitudinal beam 8 is ┌-shaped.

[0023] A rubber block 27 is provided at the end of the longitudinal beam assembly, which cooperates with the mounting bracket wedge on the frame to achieve a positioning function.

[0024] The front end crossbeam assembly includes a first inner end crossbeam 9 with a cross-section of ┌ and a second inner end crossbeam 10 located inside the first inner end crossbeam 9 with a cross-section of ┐. The connecting end of the positioning pin 4 is fixed on the front end crossbeam assembly and two are provided along the length direction of the front end crossbeam assembly.

[0025] The intermediate crossbeam assembly includes a first intermediate crossbeam 11 with a ┐-shaped cross section and a second intermediate crossbeam 12 with a ┌-shaped cross section. Both ends of the first intermediate crossbeam 11 and the second intermediate crossbeam 12 are provided with a connecting part a that passes through a strip hole on the first longitudinal beam 7 or the second longitudinal beam 8 and connects to the second longitudinal beam 8 or the first longitudinal beam 7.

[0026] In the aforementioned longitudinal and transverse beam assemblies, profiles with a U-shaped or ┌-shaped cross-section are used. The horizontal sections are directly connected to the bottom of the housing 1, while the vertical sections act as reinforcing ribs. This structural design significantly enhances the strength of the housing 1. The rollers 6 and locking components are cleverly incorporated into the structure of the longitudinal and transverse beam assemblies, improving the overall compactness of the assembly. The locking components also further strengthen the housing 1.

[0027] See appendix Figure 3 and 4 The bracket assembly is provided with a locking assembly, which includes a locking pin guide sleeve 14 that is slidably limited to each set of longitudinal beam assemblies and is provided along the length of the longitudinal beam assembly; a locking pin 15 that is limited within the locking pin guide sleeve 14; a locking rod 17 that is slidably limited within the locking rod guide sleeve 16 that is fixed to the intermediate crossbeam assembly; a connecting rod 18 that is connected at both ends to the locking rod 17 and the locking pin 15 respectively; and a spring 19 that is limited between the locking rod guide sleeve 16 and the connecting rod 18.

[0028] An end cap is provided at the end of the locking pin guide sleeve 14. One end of the locking pin 15 passes through the end cap and is limited by a limiting pin in the strip groove at one end of the connecting rod 18. A spring is also provided inside the locking pin guide sleeve 14 and between the boss of the locking pin 15 and the end cap so that the locking pin 15 is locked under the action of the spring in the initial state (when the locking rod 17 is not subjected to external force).

[0029] A connecting assembly is provided on the locking rod 17 for connecting the connecting rod 18 and located between two adjacent locking rod guide sleeves 16. The connecting assembly includes a first connecting plate 20, a second connecting plate 21, a fixing bolt 22 that passes through the second connecting plate 21 and the locking rod 17 and is threadedly connected to the first connecting plate 20, and a connecting pin 23 that passes through one end of the second connecting plate 21 and one end of the corresponding connecting rod 18 and is connected to the first connecting plate 20. The connection assembly is designed to connect the two connecting rods 18. The first connecting plate 20 and the second connecting plate 21 are both provided with grooves in the middle that fit with the locking rod 17. The two connecting plates are fixed together with the locking rod 17 by two fixing bolts 22 to prevent the two connecting plates from rotating relative to each other. At the same time, a space is formed between the ends of the two connecting plates to connect the two corresponding connecting rods 18.

[0030] When a spring 19 is provided between the connecting assembly and the locking rod guide sleeve 16, a sleeve 24 is provided on one side of the connecting assembly. This sleeve is fitted onto the locking rod 17 and extends one end to the end of the locking rod guide sleeve 16 near the front end of the housing 1. The spring 19 is fitted onto the locking rod 17 and its two ends are respectively limited between the locking rod guide sleeve 16 and the sleeve 24. The sleeve 24 is fitted onto the locking rod 17. Under the action of the spring 19, one end of the sleeve 24 abuts against one end of the connecting assembly, and the other end abuts against the end of the locking rod guide sleeve 16. In the initial state, under the action of the spring force, the other end of one, several, or all of the connecting assemblies is limited by the ends of the locking rod guide sleeves 16 away from the front end of the housing 1 in the two adjacent locking rod guide sleeves 16, so that the connecting rod 18 is perpendicular to the locking rod 17.

[0031] The locking rod guide sleeve 16 partially overlaps with the end of the sleeve 24 to prevent the spring 19 from being exposed and to facilitate relative movement between the locking rod guide sleeve 16 and the sleeve 24 when the locking assembly is released from its locked state. The sleeve 24 is designed to conceal the spring 19 between the sleeve 24 and the locking rod 17, protecting the spring 19 and preventing foreign objects from entering the spring gap and causing the locking assembly to fail. During use, lubricating oil is applied to the spring 19 to reduce friction between the spring 19 and the sleeve 24 and the locking rod 17, thus reducing noise.

[0032] A push-pull plate 25 is provided at the bottom end of the housing 1, and a push-pull rod 26 is provided at the groove end of the push-pull plate 25. Two sets of push-pull plates 25 and push-pull rods 26 are arranged side by side on the housing 1.

[0033] When the mid-mounted quick-swap battery pack of this utility model needs to be replaced, the battery box unlocking device in the battery swapping equipment will drive the locking rod 17 to move inward to the inside of the vehicle, thereby driving the end of the corresponding locking pin 15 to leave the lock hole on the frame through the connecting rod 18, thus unlocking the battery pack from the frame; during this process, the push-pull hook will enter the groove of the push-pull plate 25 and cooperate with the push-pull rod 26 to pull the battery pack out of the vehicle's battery compartment under the drive of the reciprocating drive device.

[0034] When the battery swapping device pushes a fully charged battery pack into the battery compartment, the battery box unlocking device drives the locking lever 17 to keep the locking assembly in the unlocked state. Driven by the reciprocating drive device, the battery pack is pushed into the preset position of the battery compartment through the cooperation of the push-pull hook and the push-pull plate 25. Then the battery box unlocking device resets. During this process, the push-pull hook leaves the groove of the push-pull plate 25. Under the action of the spring 19, the locking lever 17 drives the locking pin 15 through the connecting rod 18 to enter the lock hole on the frame and enter the locking state.

[0035] Finally, it is necessary to note that the above content is only used to help understand the technical solution of the present invention and should not be construed as a limitation on the scope of protection of the present invention; any non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention are all within the scope of protection claimed by the present invention.

Claims

1. A mid-mounted fast-swap battery pack for new energy commercial vehicles, characterized in that: Includes a housing (1), a battery management system assembly and one or more battery modules arranged sequentially inside the housing (1) along the length of the housing (1), a cover (2) for closing the housing (1), a battery end connector (3) fixed to the front end of the housing (1), a bracket assembly fixed to the bottom of the housing (1), and a positioning pin (4) fixed to the front end of the bracket assembly. The bracket assembly includes two sets of longitudinal beam assemblies arranged side by side at the bottom of the box (1) and along the width direction of the box (1), multiple rollers (6) arranged on each set of longitudinal beam assemblies, and a front end crossbeam assembly, multiple sets of intermediate crossbeam assemblies and a tail crossbeam (13) arranged between the two sets of longitudinal beam assemblies and along the length direction of the box (1). The longitudinal beam assembly includes a first longitudinal beam (7) with a ┐-shaped cross-section and a second longitudinal beam (8) with a ┌-shaped cross-section arranged side by side. The rollers (6) are located in the gap between the first longitudinal beam (7) and the second longitudinal beam (8) and are arranged in multiple ways along the length of the longitudinal beam assembly.

2. The mid-mounted fast-swap battery pack for new energy commercial vehicles according to claim 1, characterized in that: Multiple reinforcing beams (5) are provided at the bottom of the box (1) and along the length of the box (1).

3. The mid-mounted fast-swap battery pack for new energy commercial vehicles according to claim 1, characterized in that: The front end beam assembly includes a first inner end beam (9) with a cross-section of ┌ and a second inner end beam (10) with a cross-section of ┐. The connecting end of the positioning pin (4) is fixed on the front end beam assembly and two of them are provided along the length direction of the front end beam assembly.

4. The mid-mounted fast-swap battery pack for new energy commercial vehicles according to claim 1, characterized in that: The intermediate crossbeam assembly includes a first intermediate crossbeam (11) with a ┐-shaped cross section and a second intermediate crossbeam (12) with a ┌-shaped cross section. Both ends of the first intermediate crossbeam (11) and the second intermediate crossbeam (12) are provided with a connecting part (a) that passes through a strip hole on the first longitudinal beam (7) or the second longitudinal beam (8) and connects to the second longitudinal beam (8) or the first longitudinal beam (7).

5. The mid-mounted fast-swap battery pack for new energy commercial vehicles according to claim 1, characterized in that: A locking assembly is provided on the bracket assembly. The locking assembly includes a plurality of locking pin guide sleeves (14) that are slidably limited on the longitudinal beam assembly and arranged along the length direction of the longitudinal beam assembly, a locking pin (15) that is limited in the locking pin guide sleeves (14), a locking rod (17) that is slidably limited in the locking rod guide sleeves (16) that are fixed on the intermediate crossbeam assembly, a connecting rod (18) whose two ends are respectively connected to the locking rod (17) and the locking pin (15), and a spring (19) that is limited between the locking rod guide sleeves (16) and the connecting rod (18).

6. The mid-mounted fast-swap battery pack for new energy commercial vehicles according to claim 5, characterized in that: A connecting assembly is provided on the locking rod (17) for connecting the connecting rod (18) and located between two adjacent locking rod guide sleeves (16). The connecting assembly includes a first connecting plate (20), a second connecting plate (21), a fixing bolt (22) that passes through the second connecting plate (21) and the locking rod (17) and is threadedly connected to the first connecting plate (20), and a connecting pin (23) that passes through one end of the second connecting plate (21) and one end of the corresponding connecting rod (18) and is connected to the first connecting plate (20).

7. The mid-mounted fast-swap battery pack for new energy commercial vehicles according to claim 6, characterized in that: A sleeve (24) is provided on one side of the connecting assembly, which is fitted on the locking rod (17) and extends to the end of the locking rod guide sleeve (16). The spring (19) is fitted on the locking rod (17) and its two ends are limited between the locking rod guide sleeve (16) and the sleeve (24).

8. The mid-mounted fast-swap battery pack for new energy commercial vehicles according to any one of claims 1-7, characterized in that: A push-pull plate (25) is provided at the bottom end of the box (1), and a push-pull rod (26) is provided in the groove of the push-pull plate (25).

Images