Battery end connector based on quick release structure

Abstract

The utility model relates to electrical component technical field especially relates to a battery end connector based on quick release structure, including installation aluminium plate, detachable installation battery end high pressure subassembly and battery end low pressure subassembly on installation aluminium plate, install high pressure secondary seal on battery end high pressure subassembly, install low pressure secondary seal on battery end low pressure subassembly, be equipped with floating connecting piece between battery end low pressure subassembly and installation aluminium plate, battery end low pressure subassembly is movable with installation aluminium plate through floating connecting piece, install low pressure wiring device on battery end low pressure subassembly, the utility model discloses on the basis of the original primary seal of connector, battery end high pressure subassembly and battery end low pressure subassembly have increased secondary seal respectively, to satisfy the condition of primary seal failure, secondary seal can guarantee protection level effectively also.

Description

Technical Field

[0001] This utility model relates to the field of electrical components technology, and in particular to a battery terminal connector based on a quick-release structure. Background Technology

[0002] 1. Existing quick-swap connectors for new energy vehicles mostly use a single-layer sealing ring, i.e., primary sealing. The connector ends are sealed by a single sealing ring press-fitting. During vehicle operation, mud and sand can adhere to this ring, posing a risk of intrusion after multiple battery swaps, leading to seal failure. 2. Existing quick-swap connectors often use a snap-fit ​​installation method for the sealing ring and aluminum plate. The pull-out force after installation is relatively small, posing a risk of the sealing ring detaching from the snap-fit ​​groove during battery swapping. This detachment can damage the sealing ring or cause it to fall off entirely, resulting in seal failure. 3. Existing battery swapping connectors (flat-pressure type) often use a single-stage floating low-voltage module, meaning floating on one side. This results in a large compression stroke for the low-voltage terminals, leading to a relatively long overall length and a larger individual terminal size, resulting in a larger overall size and poor economic efficiency. Utility Model Content

[0003] To overcome the problem of protective failure of the sealing ring of quick-change connectors in new energy vehicles.

[0004] The technical solution of this utility model is as follows: a battery terminal connector based on a quick-release structure, including a mounting aluminum plate, a detachable battery terminal high-voltage component and a battery terminal low-voltage component mounted on the mounting aluminum plate, a high-voltage secondary seal on the battery terminal high-voltage component, a low-voltage secondary seal on the battery terminal low-voltage component, a floating connector between the battery terminal low-voltage component and the mounting aluminum plate, the battery terminal low-voltage component being able to move relative to the mounting aluminum plate through the floating connector, and a low-voltage connector mounted on the battery terminal low-voltage component.

[0005] Preferably, the low-voltage connector includes a battery-side low-voltage cable with one end crimped to a fixed-end low-voltage terminal, and a low-voltage connector installed at the other end of the battery-side low-voltage cable. The low-voltage connector is used to connect to the internal circuitry of the battery pack.

[0006] Preferably, the high-voltage component at the battery end includes a high-voltage insulator detachably mounted on the mounting aluminum plate and a fixed-end high-voltage terminal installed in the high-voltage insulator. The high-voltage component at the battery end has two sets, with the low-voltage component at the battery end located between the two sets of high-voltage components at the battery end. An O-ring is provided between the high-voltage insulator and the fixed-end high-voltage terminal, and an O-ring is provided between the high-voltage insulator and the mounting aluminum plate.

[0007] Preferably, the low-voltage component at the battery end includes a low-voltage insulating component that can be detachably installed on the mounting aluminum plate via fasteners and a fixed low-voltage terminal installed in the low-voltage insulating component; an O-ring is provided between the low-voltage insulating component and the fixed low-voltage terminal, and the low-voltage insulating component is provided with an annular groove in which an O-ring is installed.

[0008] Preferably, the high-pressure secondary seal is an O-ring installed on the outside of the high-pressure insulator.

[0009] Preferably, the low-pressure secondary seal is an O-ring mounted on an insulator.

[0010] Preferably, the floating connector includes a low-voltage secondary floating spring. One end of the low-voltage secondary floating spring is connected to the mounting aluminum plate, and the other end is connected to the low-voltage insulating component. The low-voltage secondary floating spring can float ±5mm, and the floating direction is consistent with the axis direction of the low-voltage pole of the fixed end (connector mating direction).

[0011] Preferably, the fastener includes two low-voltage fixed rectangular retaining rings and an M3 bolt, with the low-voltage insulating component snapped between the two low-voltage fixed rectangular retaining rings, and the low-voltage fixed rectangular retaining rings fixed to the mounting aluminum plate by the M3 bolt.

[0012] Preferably, the surface of the mounting aluminum plate is provided with a sealing gasket, which is bonded and fixed to the mounting aluminum plate by an adhesive.

[0013] Preferably, a guide sleeve is riveted onto the mounting aluminum plate, and a contact spring is installed inside the guide sleeve. The contact spring is made of stainless steel and is used to increase the reliability of the grounding of the outer casing.

[0014] The beneficial effects of this utility model are: 1. In addition to the original primary seal of the connector, secondary seals have been added to both the high-voltage component and the low-voltage component at the battery end, so that the secondary seals can still ensure the protection level is effective even if the primary seal fails. 2. During the overall pressing process of the connector, the insulation components of the high-voltage component and the low-voltage component of the battery end are designed to have a certain stroke of mating. Each mating part is equipped with a sealing ring, which can make the high-voltage component and the low-voltage component of the battery end form a radial seal after pressing. 3. In addition to the original single-sided floating mechanism, the entire module is made to float at the other end. This reduces the stroke of a single pole on one side by 1 / 2. The reduced stroke of the pole shortens its length. Under the condition of vibration and impact resistance, the force required for pole pressing is also reduced to 1 / 2 of the original value. This allows for a reduction in the outer diameter of the pole, thus optimizing the overall layout space of the module. Attached Figure Description

[0015] Figure 1 The diagram shown is a cross-sectional view of the battery connector. Figure 2 The diagram shown is a front view of the battery connector. Figure 3 The diagram shown is a schematic of the bottom surface of the battery connector. Figure 4 The diagram shown is a three-dimensional structural representation of the battery connector. Figure 5 The diagram shows the installation structure of the battery connector and the vehicle connector. Figure 6 The diagram shown is a schematic of the bottom surface of the high-voltage component at the battery end. Figure 7 The diagram shown is a front view of the high-voltage component at the battery end. Figure 8 The diagram shown is a cross-sectional view of the high-voltage component at the battery end. Figure 9 The diagram shown is a cross-sectional view of the low-voltage component at the battery end. Figure 10 The diagram shown is a schematic of the bottom surface of the low-voltage component at the battery end. Figure 11 The diagram shows the structure of the low-voltage insulation component of the battery terminal low-voltage assembly.

[0016] Explanation of reference numerals in the attached diagram: 1. Mounting aluminum plate; 2. High-voltage insulation component; 3. Fixed high-voltage terminal post; 4. Low-voltage insulation component; 5. Fixed low-voltage terminal post; 6. Guide sleeve; 7. Contact finger spring; 8. Low-voltage secondary floating spring; 9. High-voltage secondary seal; 10. Low-voltage secondary seal; 11. O-ring one; 12. O-ring two; 13. Low-voltage fixed rectangular retaining ring; 14. Sealing gasket; 15. Low-voltage cable at the battery end; 16. Low-voltage connector; 17. Vehicle-end connector; 18. Vehicle-end high-voltage assembly; 19. Vehicle-end low-voltage assembly; 20. High-voltage floating spring; 21. Lip seal. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Please see Figures 1-11This utility model provides an embodiment: a battery-side connector based on a quick-release structure, including a mounting aluminum plate 1, a detachable high-voltage battery-side assembly and a low-voltage battery-side assembly mounted on the mounting aluminum plate 1. A high-voltage secondary seal 9 is mounted on the high-voltage battery-side assembly, and a low-voltage secondary seal 10 is mounted on the low-voltage battery-side assembly. A floating connector is provided between the low-voltage battery-side assembly and the mounting aluminum plate 1, allowing the low-voltage battery-side assembly to move relative to the mounting aluminum plate 1 via the floating connector. A low-voltage connector is mounted on the low-voltage battery-side assembly. Notably, the battery-side connector is used in conjunction with a vehicle-side connector 17. The high-voltage secondary seal 9 and the low-voltage secondary seal 10 constitute a second-level protective barrier, providing good protection even after the first-level protective barrier (lip seal 21 hereinafter referred to as the lip seal ring 21) on the vehicle-side connector 17 fails. The connector includes 2 pins for high voltage and 20 pins for low voltage. After installation, the battery-side connector meets the single-end IP68 requirement (1.5m water depth, continuous immersion for 24 hours, no mud or sand intrusion or water seepage). The low-voltage connector includes a battery-side low-voltage cable 15 with one end crimped to a fixed low-voltage terminal 5, and a low-voltage connector 16 installed at the other end of the battery-side low-voltage cable 15.

[0019] Please see Figure 1 and Figures 6-8 In this embodiment, the battery-side high-voltage assembly includes a high-voltage insulator 2 detachably mounted on the mounting aluminum plate 1 and a fixed-end high-voltage terminal 3 mounted in the high-voltage insulator 2. The battery-side high-voltage assembly has two sets, with the battery-side low-voltage assembly located between the two sets of battery-side high-voltage assemblies. An O-ring 11 is provided between the high-voltage insulator 2 and the fixed-end high-voltage terminal 3, and an O-ring 12 is provided between the high-voltage insulator 2 and the mounting aluminum plate 1. The high-voltage secondary seal 9 is an O-ring mounted on the outside of the high-voltage insulator 2.

[0020] Please see Figure 1 and Figures 9-11 In this embodiment, the low-voltage assembly at the battery end includes a low-voltage insulating component 4 that is detachably mounted to the mounting aluminum plate 1 via fasteners, and a fixed-end low-voltage terminal 5 installed in the low-voltage insulating component 4; an O-ring 11 is provided between the low-voltage insulating component 4 and the fixed-end low-voltage terminal 5, and the low-voltage insulating component 4 has an annular groove in which an O-ring 2 12 is installed. The low-voltage secondary seal 10 is an O-ring installed on the insulator.

[0021] Please see Figure 1 , Figure 5 and Figure 9 In this embodiment, the floating connector includes a low-pressure secondary floating spring 8, one end of which is connected to the mounting aluminum plate 1, and the other end is connected to the low-pressure insulating component 4.

[0022] Please see Figures 1-5In this embodiment, the fastener includes two low-pressure fixed rectangular retaining rings 13 and an M3 bolt. The low-pressure insulating component 4 is snapped between the two low-pressure fixed rectangular retaining rings 13, and the low-pressure fixed rectangular retaining rings 13 are fixed to the mounting aluminum plate 1 by the M3 bolt. The detachable connection design between the low-pressure fixed rectangular retaining rings 13 and the M3 bolt constitutes a quick-release structure. During disassembly, only the M3 bolt needs to be loosened to remove the retaining ring, realizing the rapid separation of the low-pressure component. A sealing gasket 14 is provided on the surface of the mounting aluminum plate 1, and the sealing gasket 14 is bonded to the mounting aluminum plate 1 with an adhesive. A guide sleeve 6 is riveted on the mounting aluminum plate 1, and a contact spring 7 is installed inside the guide sleeve 6.

[0023] The main body of the battery connector is a mounting aluminum plate 1 (made of 6061 aluminum alloy, combining lightweight and strength, with anodized surface treatment to improve corrosion resistance). Mounting aluminum plate 1 has four mounting holes at its corners for overall battery mounting and fixing, two in the middle for fixing the high-voltage battery components, and one for fixing the low-voltage battery components. The front of mounting aluminum plate 1 has a raised boss around its edge, with a flange around the circumference. When the battery connector and vehicle connector 17 are pressed together, the boss presses against the lip seal ring 21 on the vehicle connector 17, creating a certain compression ratio to provide a sealing and protective function (first-level protection). Two guide sleeves 6 are riveted to mounting aluminum plate 1, serving as guides when the vehicle connector 17 is inserted. The guide sleeve 6 has an annular groove inside, in which a contact finger spring (stainless steel) is installed. During insertion, this ensures reliable conduction of the guide pins on the vehicle connector 17, significantly improving the overall grounding conductivity of the connector. Both the high-voltage and low-voltage components at the battery end are designed with O-rings 11 and 12 (specifically made of fluororubber for aging resistance), forming an IP68 protection rating. The sealing gasket 14 is mounted on the back of the mounting aluminum plate 1. When the battery end connector is installed and fixed, it will compress the sealing gasket 14 to a certain extent, allowing the battery end connector to form an IP68 protection rating with the battery pack after installation. When the secondary and primary seals work together, IP68 protection is maintained after 10,000 repeated mating cycles (simulating battery swapping frequency).

[0024] The main body of the low-voltage component at the battery end is the low-voltage insulator 4. The low-voltage insulator 4 has a 20-pin stepped hole for mounting the fixed low-voltage terminal post 5. A groove on the bottom outer ring accommodates a low-voltage secondary seal 10 (O-ring), used for secondary sealing of the low-voltage component at the battery end when it is fully inserted with the vehicle-side connector 17. Two grooves in the middle of the low-voltage insulator 4 accommodate O-rings 12 for sealing the low-voltage component at the battery end with the mounting aluminum plate 1. Four blind holes are designed on the main body of the middle section of the low-voltage insulator 4 for mounting a low-voltage secondary floating spring 8. The upper part of the low-voltage secondary floating spring 8 contacts the mounting aluminum plate 1, allowing the spring to float up and down within a certain range. The top rectangular outer ring of the low-voltage insulator 4 also has a groove for mounting low-voltage fixed rectangular retaining rings 13. During installation, the low-voltage insulator 4 is compressed as a whole using a tooling fixture, and then the two rectangular retaining rings are installed in the grooves on its top. Finally, the two rectangular retaining rings are secured with M3 bolts. The fixed low-voltage terminal 5 is made of nickel-plated copper. A cylindrical stepped O-ring 11 is installed on the bottom step of the fixed low-voltage terminal 5. The fixed low-voltage terminal 5 has two barbs in the middle. When the fixed low-voltage terminal 5 is installed in place, the barbs embed into the low-voltage insulation component 4, which can lock the fixed low-voltage terminal 5. The fixed low-voltage terminal 5 has a hole at the tail for crimping with the low-voltage cable 15 of the battery.

[0025] Please see Figure 5 The specific implementation of the vehicle-end connector 17, which is used to mate with the battery-end connector, is as follows: The vehicle-end connector 17 mainly includes a vehicle-end high-voltage component 18, a vehicle-end low-voltage component 19, a high-voltage floating spring 20 (with the same floating space as the low-voltage secondary floating spring 8, realizing bidirectional synchronous floating when the connector is inserted) and a lip seal ring 21.

[0026] The main body of the vehicle-side connector 17 consists of a fixed aluminum plate and a floating plate. The floating plate and the fixed aluminum plate are connected and float by four tension springs. Guide posts are riveted to the floating plate, and guide pads are installed in the holes behind the guide posts. When pressed together, the floating plate and the fixed aluminum plate are supported by the guide pads. The top of the guide post is an elliptical transition surface, which serves as a guide during the first contact when the battery-side connector and the vehicle-side connector 17 are inserted. The insulating parts of the vehicle-side high-voltage assembly 18 and the vehicle-side low-voltage assembly 19 are bolted to the floating plate and float together with the floating plate. The outlet sockets of the vehicle-side high-voltage assembly 18 and the vehicle-side low-voltage assembly 19 are installed on the top of the fixed aluminum plate.

[0027] The vehicle-side high-voltage assembly 18 has four screw mounting holes at its bottom for installation and fixation. An O-ring is installed in the groove on the outer ring for sealing with the floating plate. The high-voltage terminal is made of silver-plated brass (to reduce contact resistance and improve conductivity). A contact spring is installed in the groove at the bottom, and the top hole is crimped to the high-voltage cable. After crimping, the high-voltage terminal and the high-voltage terminal sleeve (made of aluminum) are connected together by a retaining ring. The high-voltage terminal spring is fitted onto the outer ring of the high-voltage terminal sleeve, and the whole assembly is installed inside the high-voltage insulation component 2. After the spring is compressed, it is fixed by a retaining ring on the shaft. The high-voltage cable is crimped to the high-voltage socket terminal at the top, and then the high-voltage cable is shaped into a lantern ball to reduce damage to the high-voltage core during floating. Finally, a silicone lantern ball sleeve is installed, and the upper and lower ends of the lantern ball sleeve are respectively fitted into the corresponding clips. When the battery-side connector and the vehicle-side connector 17 are plugged in, the high-voltage terminal is compressed, and the inner ring at the bottom of the high-voltage insulation component 2 of the vehicle-side connector 17 will press against the secondary sealing O-ring on the high-voltage module of the battery-side connector, achieving the purpose of secondary sealing of the high-voltage module.

[0028] The floating lantern ball in the high-voltage assembly 18 and the low-voltage cable in the low-voltage assembly 19 float within the aluminum plate cavity. The floating plate is mounted on the fixed aluminum plate, and its outward movement is restricted by the floating plate pressure plates at two corners. The lip seal 21 (primary seal) and the floating aluminum plate are integrated through an adhesive coating process. The edge of the lip seal 21 is fitted to the bottom surface of the fixed aluminum plate, and then pressed together with a cover plate by bolts. There are two raised ribs for sealing at the fitting area and the screw through hole area. The pressure relief valve is mounted on the fixed aluminum plate, and the blind hole threaded hole at the other end is used for the installation of the grounding wire.

Claims

1. A battery terminal connector based on a quick-release structure, comprising a mounting aluminum plate (1), characterized in that: It also includes a detachable high-voltage battery assembly and a low-voltage battery assembly mounted on an aluminum mounting plate (1). The high-voltage battery assembly is equipped with a high-voltage secondary seal (9), and the low-voltage battery assembly is equipped with a low-voltage secondary seal (10). A floating connector is provided between the low-voltage battery assembly and the aluminum mounting plate (1). The low-voltage battery assembly can move relative to the aluminum mounting plate (1) through the floating connector. A low-voltage connector is installed on the low-voltage battery assembly.

2. A battery terminal connector based on a quick-release structure according to claim 1, characterized in that: The low-voltage connector includes a battery-side low-voltage cable (15) crimped at one end to a fixed-end low-voltage terminal (5), and a low-voltage connector (16) installed at the other end of the battery-side low-voltage cable (15).

3. A battery terminal connector based on a quick-release structure according to claim 1, characterized in that: The high-voltage battery assembly includes a high-voltage insulator (2) that is detachably mounted on an aluminum mounting plate (1) and a fixed high-voltage terminal (3) mounted in the high-voltage insulator (2). The high-voltage battery assembly has two sets, with the low-voltage battery assembly located between the two sets of high-voltage battery assemblies. An O-ring 1 (11) is provided between the high-voltage insulating component (2) and the fixed end high-voltage pole (3), and an O-ring 2 (12) is provided between the high-voltage insulating component (2) and the mounting aluminum plate (1).

4. A battery terminal connector based on a quick-release structure according to claim 1, characterized in that: The battery-side low-voltage assembly includes a low-voltage insulator (4) that can be detachably mounted to a mounting aluminum plate (1) via fasteners, and a fixed-end low-voltage terminal (5) mounted in the low-voltage insulator (4). An O-ring (11) is provided between the low-voltage insulating component (4) and the fixed low-voltage pole (5). The low-voltage insulating component (4) is provided with an annular groove, and an O-ring (12) is installed in the annular groove.

5. A battery terminal connector based on a quick-release structure according to claim 3, characterized in that: The high-voltage secondary seal (9) is an O-ring installed on the outside of the high-voltage insulator (2).

6. A battery terminal connector based on a quick-release structure according to claim 4, characterized in that: The low-pressure secondary seal (10) is an O-ring mounted on an insulator.

7. A battery terminal connector based on a quick-release structure according to claim 1, characterized in that: The floating connector includes a low-pressure secondary floating spring (8), one end of which is connected to the mounting aluminum plate (1) and the other end is connected to the low-pressure insulating component (4).

8. A battery terminal connector based on a quick-release structure according to claim 4, characterized in that: The fasteners include two low-voltage fixed rectangular retaining rings (13) and M3 bolts. The low-voltage insulating component (4) is snapped between the two low-voltage fixed rectangular retaining rings (13). The low-voltage fixed rectangular retaining rings (13) are fixed to the mounting aluminum plate (1) by M3 bolts.

9. A battery terminal connector based on a quick-release structure according to claim 4, characterized in that: The surface of the mounting aluminum plate (1) is provided with a sealing gasket (14), which is bonded to the mounting aluminum plate (1) by an adhesive.

10. A battery terminal connector based on a quick-release structure according to claim 4, characterized in that: A guide sleeve (6) is riveted onto the aluminum plate (1), and a finger spring (7) is installed inside the guide sleeve (6).

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