Power battery suitable for CTV technology and vehicle

Abstract

The invention discloses a power battery suitable for the CTV technology and a vehicle, the power battery suitable for the CTV technology comprises a power battery box body, a first bottom cover and a second bottom cover, the upper side of the power battery box body is used for being connected with a vehicle body floor, an electric appliance assembly and a battery cell assembly are arranged in the power battery box body, and the first bottom cover and the second bottom cover are arranged in the power battery box body. The first bottom cover and the second bottom cover are both connected with the power battery box body, the first bottom cover is located on the lower side of the electric appliance assembly, and the second bottom cover is located on the lower side of the battery cell assembly. According to the invention, the battery cell is directly integrated into the vehicle body structure, and troubleshooting, maintenance and assembly processes can be carried out from bottom to top without arranging a high assembly station, and operation can be carried out only by using a repair operation trench, a flat ground or a platform.

Description

Technical Field

[0001] The present invention relates to a power battery, and in particular to a power battery and a vehicle applicable to CTV technology. Background Art

[0002] CTV (Cell to Vehicle) technology integrates battery cells directly into the vehicle body structure, replacing the traditional layered "cell-module-battery pack-body" architecture. When a power battery using CTV technology needs to be troubleshooted, repaired, or replaced, the cover must be opened, requiring disassembly of the seats, dashboard, interior, and entire vehicle floor. This process is tedious, complex, inefficient, and results in low customer satisfaction. Furthermore, troubleshooting, repairs, and replacement assembly for power batteries using CTV technology must all be performed on top of the power battery. However, common repair shops and battery assembly workshops in China lack high-level assembly stations, making troubleshooting, repairs, and assembly of power batteries more inconvenient. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a power battery and vehicle suitable for CTV technology, in which the battery cells are directly integrated into the vehicle body structure, and problem troubleshooting, maintenance processes and assembly processes can be carried out from bottom to top, without the need to set up a high assembly station, and operations can be carried out using only a repair trench, flat ground or platform.

[0004] A power battery suitable for CTV technology in the present invention includes a power battery case, a first bottom cover and a second bottom cover. The upper side of the power battery case is used to connect to the vehicle body floor. Electrical components and battery cell components are arranged inside the power battery case. The first bottom cover and the second bottom cover are both connected to the power battery case. The first bottom cover is located on the lower side of the electrical components, and the second bottom cover is located on the lower side of the battery cell components.

[0005] Furthermore, an electrical accommodating cavity is provided in the power battery box between the vehicle body floor and the first bottom cover, and the electrical components include a first high-voltage assembly, a second high-voltage assembly and a BMU assembly arranged in the electrical accommodating cavity.

[0006] Furthermore, a detachable first bracket assembly is provided in the electrical appliance accommodating cavity, the first high-voltage assembly includes a first high-voltage box, the opening of the first high-voltage box faces upward, and the first high-voltage box is provided with a pre-charge resistor, a pre-charge relay and a first control wiring harness assembly, and the first high-voltage box is connected to the first bracket assembly in a detachable manner.

[0007] Furthermore, a plurality of first mounting ears are provided on the outside of the first high-voltage box; the first bracket assembly includes a plurality of first L-shaped brackets, and the plurality of first L-shaped brackets each include a vertical flange connected to the electrical appliance accommodating cavity and a horizontal flange connected to the first mounting ear.

[0008] Furthermore, a first longitudinal beam and a second longitudinal beam are arranged at intervals along the left and right directions in the electrical accommodating cavity; the second high-voltage assembly includes a second high-voltage box, the opening of the second high-voltage box faces downward, and the second high-voltage box is provided with a main positive relay, a fast charging relay, a current sensor, a fuse and a second control wiring harness assembly, and the left and right sides of the second high-voltage box are respectively connected to the first longitudinal beam and the second longitudinal beam in a detachable manner.

[0009] Furthermore, a plurality of second mounting lugs are provided on the outside of the second high-voltage box, and the plurality of second mounting lugs are respectively connected to the first longitudinal beam or the second longitudinal beam in a detachable manner.

[0010] Furthermore, the BMU assembly includes a BMU carrier and a plurality of BMU bodies arranged on the BMU carrier. A detachable second bracket assembly is provided in the electrical accommodating cavity, and the BMU carrier is detachably connected to the second bracket assembly.

[0011] Furthermore, the second bracket assembly includes two second L-shaped brackets respectively connected to the left and right sides of the BMU carrier frame, and the two second L-shaped brackets each include a vertical frame body and a horizontal frame body connected to the vertical frame body, wherein one of the vertical frames is detachably connected to the second longitudinal beam, and the other vertical frame body is detachably connected to the side wall of the electrical appliance accommodating cavity, and the two horizontal frames are respectively detachably connected to the left and right sides of the BMU carrier frame.

[0012] Furthermore, the upper side of the power battery box is an open structure, and the vehicle body floor serves as an upper cover of the power battery box to close the opening structure of the power battery box.

[0013] A vehicle in the present invention includes the above-mentioned power battery applicable to the CTV technology.

[0014] The beneficial effects of the present invention are: (1) The power battery box of the present invention eliminates the upper cover and closes its opening structure through the vehicle body floor, forming a shield for the electrical components and battery cell components, thereby realizing the direct integration of the battery cell into the vehicle body structure. Since the upper cover is eliminated, the weight is greatly reduced, which is conducive to lightweighting the entire vehicle and reducing the vehicle body cost. In addition, the Z-axis space of the cabin is optimized, which can improve the riding comfort of passengers.

[0015] (2) The first bottom cover of the power battery case of the present invention is used to shield and protect the electrical components, and the second bottom cover is used to shield and protect the battery cell components. When the power battery is faced with the problem of troubleshooting and replacement repair during after-sales maintenance, the entire vehicle can be lifted or moved into a repair trench, flat ground or above a platform, and the first bottom cover can be opened or removed from the bottom of the power battery, so that the problem of the power battery can be checked, repaired or replaced with another part. This effectively avoids the need to disassemble the seats, instrument panel, car interior and body floor. The problem troubleshooting, repair process and assembly process can all be carried out from the bottom up, without the need to set up a high assembly station, and can be operated using only the repair trench, flat ground or platform.

[0016] (3) The present invention integrates different electrical components into the first high-voltage box and the second high-voltage box respectively, forming the first high-voltage assembly and the second high-voltage assembly, according to whether different electrical components have assembly direction restrictions. The mounting structures of the first high-voltage assembly and the second high-voltage assembly are optimized and set respectively, which can simplify the assembly or disassembly of the first high-voltage assembly and the second high-voltage assembly while meeting the assembly requirements of each electrical component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 Schematic top view of the power battery box of the present invention; Figure 3 Schematic diagram of the explosion structure of the first high-voltage assembly of the present invention; Figure 4 A schematic diagram of the explosion structure of a portion of the periphery of the first high-voltage assembly of the present invention from a top view; Figure 5 A bottom view schematically shows a partial periphery of the first high-voltage assembly of the present invention; Figure 6 Schematic diagram of the explosion structure of the second high-voltage assembly of the present invention; Figure 7 is a schematic top view of a portion of the periphery of the second high-voltage assembly of the present invention; Figure 8 A schematic diagram of the explosion structure of a portion of the periphery of the second high-voltage assembly of the present invention from a top view; Figure 9 A bottom view of a portion of the second high-voltage assembly of the present invention Figure 10 Schematic diagram of the explosion structure of the BMU assembly of the present invention; Figure 11This is a schematic diagram of the exploded structure of the BMU assembly and the second bracket assembly of the present invention; Figure 12 This is a schematic structural diagram of a power battery box of the present invention, partially around the second bracket assembly; Figure 13 It is a bottom view schematic diagram of a part of the periphery of the BMU assembly of the present invention.

[0018] The markings in the accompanying drawings are as follows: 1-power battery box, 101-first bracket assembly, 102-first longitudinal beam, 103-second longitudinal beam, 104-second bracket assembly, 2-first bottom cover, 3-second bottom cover, 4-body floor, 5-first high-voltage assembly, 501-first high-voltage box, 502-pre-charging resistor, 503-pre-charging relay, 504-first control wiring harness assembly, 505-first mounting lug, 6-second high-voltage assembly, 601-second high-voltage box, 602-main positive relay, 603-fast charging relay, 604-current sensor, 605-fuse, 606-second control wiring harness assembly, 607-second mounting lug, 7-BMU assembly, 701-BMU carrier frame, 702-BMU body, 8-battery cell assembly, 9-vertical bolt, 10-horizontal bolt. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1-13 As shown, a power battery suitable for CTV technology in this embodiment includes a power battery case 1, a first bottom cover 2, and a second bottom cover 3. The upper side of the power battery case 1 is used to connect to the vehicle body floor 4. The power battery case 1 is provided with electrical components and battery cell assemblies 8. The first bottom cover 2 and the second bottom cover 3 are both connected to the power battery case 1. The first bottom cover 2 is located below the electrical components, and the second bottom cover 3 is located below the battery cell assemblies 8. The upper side of the power battery case 1 is an open structure, and the vehicle body floor 4 serves as the upper cover of the power battery case 1 to close the opening structure of the power battery case 1.

[0021] The power battery box 1 has eliminated the upper cover, and its opening structure is closed by the vehicle body floor 4 to form a cover for the electrical components and battery cell components 8, thereby realizing the direct integration of the battery cells into the vehicle body structure. Since the upper cover is eliminated, the weight is greatly reduced, which is conducive to lightweighting the entire vehicle and reducing the body cost. In addition, the Z-axis space of the cabin is optimized, which can improve the riding comfort of passengers.

[0022] In addition, the lower cover of the power battery case 1 is divided into two parts: a first bottom cover 2 and a second bottom cover 3. The first bottom cover 2 is used to cover and protect the electrical components, and the second bottom cover 3 is used to cover and protect the battery cell assembly 8. Preferably, the first bottom cover 2 is removable or rotatably openable and closable. Removable means that the first bottom cover 2 is connected to the power battery case 1 by a circle of bolts, and rotatably openable and closable means that one side of the first bottom cover 2 is connected to the power battery case 1 by bolts and the other side is connected to the power battery case 1 by a hinge. When after-sales maintenance of the power battery faces the problem of troubleshooting and replacing parts, the entire vehicle can be lifted or moved to a repair trench, flat ground, or above a platform, and the first bottom cover 2 can be opened or removed from the bottom of the power battery, so that the problem of the power battery can be checked, repaired, or replaced and assembled. This effectively avoids the need to disassemble the seats, instrument panel, vehicle interior, and body floor 4. The problem troubleshooting, repair process, and assembly process can all be carried out from the bottom up, without the need to set up an assembly high station. The operation can be carried out using only the repair trench, flat ground, or platform. Of course, the power battery in this embodiment can also be disassembled in a traditional way, such as by disassembling the seats, instrument panel, car interior, and body floor 4, and then performing troubleshooting, maintenance, and assembly processes from top to bottom.

[0023] In this embodiment, an electrical accommodating cavity is provided in the power battery box 1 between the vehicle body floor 4 and the first bottom cover 2, and the electrical components include a first high-voltage assembly 5, a second high-voltage assembly 6 and a BMU assembly 7 arranged in the electrical accommodating cavity.

[0024] The electrical components in the electrical accommodating cavity can be the rear side or front side of the battery cell assembly 8. The first high-voltage assembly 5, the second high-voltage assembly 6 and the BMU assembly 7 are arranged in the left and right directions. The three units are located in the electrical accommodating cavity on the same side of the battery cell assembly 8. It is only necessary to open or remove the first bottom cover 2 to carry out problem troubleshooting, maintenance procedures and assembly procedures.

[0025] In this embodiment, a detachable first bracket assembly 101 is provided in the electrical accommodating cavity, and the first high-voltage assembly 5 includes a first high-voltage box 501, the opening of the first high-voltage box 501 faces upward, and the first high-voltage box 501 is provided with a pre-charging resistor 502, a pre-charging relay 503 and a first control wiring harness assembly 504, and the first high-voltage box 501 is connected to the first bracket assembly 101 in a detachable manner.

[0026] On the production line, the power battery case 1, the battery cell assembly 8, and the second bottom cover 3 have already been assembled together in the previous process. In the battery assembly workshop, only the electrical components and the first bottom cover 2 need to be assembled. Among them, electrical components such as the pre-charge resistor 502 and the pre-charge relay 503 have assembly direction restrictions. Generally, the pre-charge resistor 502 and the pre-charge relay 503 are required to be installed upwards. Therefore, the pre-charge resistor 502 and the pre-charge relay 503 are integrated into the first high-voltage box 501. When the whole vehicle is assembled, the first high-voltage assembly 5 can be directly assembled to the power battery case 1 as a whole. There is no need to set up an assembly high station. The first high-voltage box 501 can be assembled to the power battery case 1 using only a repair trench, flat ground, or platform.

[0027] In this embodiment, a plurality of first mounting ears 505 are provided on the outside of the first high-voltage box 501; the first bracket assembly 101 includes a plurality of first L-shaped brackets, and the plurality of first L-shaped brackets each include a vertical flange connected to the electrical appliance accommodating cavity and a horizontal flange connected to the first mounting ears 505.

[0028] During assembly, first, the first bracket assembly 101 is connected to the first high-voltage box 501 of the first high-voltage assembly 5, specifically, the horizontal flange is connected to the first mounting ear 505 of the first high-voltage box 501 through multiple vertical axis vertical bolts 9, and then, the first bracket assembly 101 is connected to the electrical accommodating cavity, specifically, the vertical flange is connected to the side wall or beam of the battery accommodating cavity through multiple horizontal axis horizontal bolts 10.

[0029] When opening or removing the first bottom cover 2 and troubleshooting and repairing the problem from bottom to top, first, separate the first bracket assembly 101 from the electrical accommodating cavity, that is, remove the first bracket assembly 101. Specifically, remove each transverse bolt 10 to separate the vertical flange from the side wall or beam of the battery accommodating cavity, then move the first bracket assembly 101 downward to a certain position, and then inspect the pre-charging resistor 502, pre-charging relay 503 and the first control wiring harness assembly 504.

[0030] This method of assembly through vertical flanging can be assembled from bottom to top, or disassembled from top to bottom. During the assembly and disassembly process, when the first high-voltage assembly 5 and the first bracket assembly 101 move in the up and down directions, the first high-voltage assembly 5 and the first bracket assembly 101 can be prevented from interfering with the side wall or beam body of the battery accommodating cavity, which can facilitate the assembly or maintenance of the first high-voltage assembly 5 from bottom to top.

[0031] In this embodiment, a first longitudinal beam 102 and a second longitudinal beam 103 are arranged at intervals along the left and right directions in the electrical accommodating cavity; the second high-voltage assembly 6 includes a second high-voltage box 601, the opening of the second high-voltage box 601 faces downward, and the second high-voltage box 601 is provided with a main positive relay 602, a fast charging relay 603, a current sensor 604, a fuse 605 and a second control wiring harness assembly 606, and the left and right sides of the second high-voltage box 601 are respectively connected to the first longitudinal beam 102 and the second longitudinal beam 103 in a detachable manner.

[0032] On the production line, the power battery case 1, cell assembly 8, and second bottom cover 3 have already been assembled together in the previous process. In the battery assembly workshop, only the electrical components and first bottom cover 2 need to be assembled. Among them, electrical components such as the main positive relay 602, fast charging relay 603, current sensor 604, and fuse 605 are not subject to special assembly direction restrictions. Therefore, these components without special requirements are integrated into the second high-voltage box 601. During vehicle assembly, the second high-voltage assembly 6 can be directly assembled to the power battery case 1 as a whole. There is no need to set up an assembly high station. The second high-voltage assembly 6 can be assembled to the power battery case 1 using only a repair trench, flat ground, or platform. In addition, the second high-voltage assembly 6 and the first high-voltage assembly 5 do not affect each other during assembly or disassembly.

[0033] In this embodiment, a plurality of second mounting ears 607 are provided on the outside of the second high-voltage box 601 , and the plurality of second mounting ears 607 are respectively connected to the first longitudinal beam 102 or the second longitudinal beam 103 in a detachable manner.

[0034] During assembly, first, the second high-voltage assembly 6 is inverted as a whole on the first longitudinal beam 102 and the second longitudinal beam 103. Inverting means that the opening of the second high-voltage box 601 is downward. Then, each second mounting lug 607 is connected to the first longitudinal beam 102 or the second longitudinal beam 103 through multiple vertical bolts 9 along the axis.

[0035] When the first bottom cover 2 is opened or removed and the problem is checked and repaired from bottom to top, since the opening of the second high-voltage box 601 is downward, the main positive relay 602, fast charging relay 603, current sensor 604, fuse 605 and second control wiring harness assembly 606 in the second high-voltage box 601 are all exposed downward, so the problem can be checked and repaired directly, which can improve the efficiency of problem troubleshooting and repair and reduce the difficulty of problem troubleshooting and repair.

[0036] In this embodiment, the BMU assembly 7 includes a BMU carrier 701 and multiple BMU bodies 702 mounted on the BMU carrier 701. A detachable second bracket assembly 104 is disposed within the electrical compartment, and the BMU carrier 701 and the second bracket assembly 104 are detachably connected. BMU stands for battery management unit.

[0037] On the production line, the power battery case 1, cell assembly 8, and second bottom cover 3 are already assembled together in previous steps. In the final battery assembly workshop, only the electrical components and first bottom cover 2 need to be assembled. The BMU assembly 7 has no specific orientation restrictions during assembly. During vehicle assembly, the BMU assembly 7 can be directly assembled to the power battery case 1 as a whole, eliminating the need for a high-level assembly station. The BMU assembly 7 can be assembled to the power battery case 1 using only a repair trench, flat ground, or platform. Furthermore, the BMU assembly 7 and first high-voltage assembly 5 are located on opposite sides of the second high-voltage assembly 6, ensuring that they do not interfere with each other during assembly or disassembly.

[0038] In this embodiment, the second bracket assembly 104 includes two second L-shaped brackets respectively connected to the left and right sides of the BMU carrier frame 701, and the two second L-shaped brackets each include a vertical frame body and a horizontal frame body connected to the vertical frame body, wherein one of the vertical frames is detachably connected to the second longitudinal beam 103, and the other vertical frame body is detachably connected to the side wall of the electrical appliance accommodating cavity, and the two horizontal frames are respectively detachably connected to the left and right sides of the BMU carrier frame 701.

[0039] During assembly, the BMU carrier 701 and multiple BMU bodies 702 are first assembled as a whole into the BMU assembly 7. The BMU assembly 7 is assembled from the bottom up. Multiple vertical bolts 9 are used to connect the BMU carrier 701 to the horizontal frame of the second bracket assembly 104. Then, multiple horizontal bolts 10 are used to connect the vertical frame of the second bracket assembly 104 to the side wall of the appliance compartment or the second longitudinal beam 103.

[0040] When opening or removing the first bottom cover 2 and troubleshooting or repairing from bottom to top, the part of the BMU body 702 located below the BMU carrier 701 can be directly troubleshooted, repaired, or replaced. When troubleshooting, repairing, or replacing the part of the BMU body 702 located above the BMU carrier 701, the second bracket assembly 104 can be removed. Specifically, each horizontal bolt 10 is removed to separate the vertical frame from the side wall or beam of the battery accommodating cavity.

[0041] This method of assembling through a vertical frame can be assembled from the bottom up, or disassembled from the top down. During the assembly and disassembly process, when the BMU assembly 7 and the second bracket assembly 104 move in the up and down directions, the BMU assembly 7 and the second bracket assembly 104 can be prevented from interfering with the side walls or beams of the battery accommodating cavity, which can facilitate the assembly or maintenance of the BMU assembly 7 and the second bracket assembly 104 from the bottom up.

[0042] A vehicle in the present invention includes the above-mentioned power battery applicable to the CTV technology.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A power battery suitable for CTV technology, characterized by: The invention comprises a power battery box (1), a first bottom cover (2) and a second bottom cover (3), wherein the upper side of the power battery box (1) is used to connect with the vehicle body floor (4), an electrical component and a battery cell component (8) are arranged inside the power battery box (1), the first bottom cover (2) and the second bottom cover (3) are both connected to the power battery box (1), the first bottom cover (2) is located on the lower side of the electrical component, and the second bottom cover (3) is located on the lower side of the battery cell component (8).

2. The power battery suitable for CTV technology according to claim 1, characterized in that: An electrical accommodating cavity is provided in the power battery box (1) between the vehicle body floor (4) and the first bottom cover (2), and the electrical component comprises a first high-voltage assembly (5), a second high-voltage assembly (6), and a BMU assembly (7) arranged in the electrical accommodating cavity.

3. The power battery suitable for CTV technology according to claim 2, characterized in that: A detachable first bracket assembly (101) is provided in the electrical appliance accommodating chamber, the first high-voltage assembly (5) comprises a first high-voltage box (501), the opening of the first high-voltage box (501) faces upward, a pre-charging resistor (502), a pre-charging relay (503) and a first control wiring harness assembly (504) are provided in the first high-voltage box (501), and the first high-voltage box (501) is connected to the first bracket assembly (101) in a detachable manner.

4. The power battery suitable for CTV technology according to claim 3, characterized in that: The first high-voltage box (501) is provided with a plurality of first mounting lugs (505) on the outside; the first bracket assembly (101) comprises a plurality of first L-shaped brackets, each of the plurality of first L-shaped brackets comprising a vertical flange connected to the electrical appliance accommodating cavity and a horizontal flange connected to the first mounting lug (505).

5. The power battery suitable for CTV technology according to claim 2, characterized in that: A first longitudinal beam (102) and a second longitudinal beam (103) are arranged in the electrical appliance accommodating chamber at intervals along the left and right directions; the second high-voltage assembly (6) includes a second high-voltage box (601), the opening of the second high-voltage box (601) faces downward, and the second high-voltage box (601) is provided with a main positive relay (602), a fast charging relay (603), a current sensor (604), a fuse (605) and a second control wiring harness assembly (606); the left and right sides of the second high-voltage box (601) are respectively connected to the first longitudinal beam (102) and the second longitudinal beam (103) in a detachable manner.

6. The power battery suitable for CTV technology according to claim 5, characterized in that: A plurality of second mounting lugs (607) are provided on the outside of the second high-voltage box (601), and the plurality of second mounting lugs (607) are respectively connected to the first longitudinal beam (102) or the second longitudinal beam (103) in a detachable manner.

7. The power battery suitable for CTV technology according to claim 5, characterized in that: The BMU assembly (7) comprises a BMU carrier (701) and a plurality of BMU bodies (702) arranged on the BMU carrier (701); a detachable second bracket assembly (104) is arranged in the electrical appliance accommodating cavity; the BMU carrier (701) and the second bracket assembly (104) are connected in a detachable manner.

8. The power battery suitable for CTV technology according to claim 7, characterized in that: The second bracket assembly (104) includes two second L-shaped brackets respectively connected to the left and right sides of the BMU carrier frame (701), and the two second L-shaped brackets each include a vertical frame body and a horizontal frame body connected to the vertical frame body, wherein one of the vertical frames is detachably connected to the second longitudinal beam (103), and the other vertical frame body is detachably connected to the side wall of the electrical appliance accommodating cavity, and the two horizontal frames are respectively detachably connected to the left and right sides of the BMU carrier frame (701).

9. The power battery suitable for CTV technology according to claim 1, characterized in that: The upper side of the power battery box (1) is an open structure, and the vehicle body floor (4) serves as an upper cover of the power battery box (1) to close the opening structure of the power battery box (1).

10. A vehicle, characterized in that: The invention comprises a power battery applicable to CTV technology as described in any one of claims 1 to 9.

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