High-voltage electrical connection device of power battery pack

Abstract

The utility model relates to the technical field of battery charging connecting devices, and discloses a high-voltage electrical connecting device of a power battery pack, which comprises a plug mechanism, a socket mechanism and four connecting mechanisms, the plug mechanism comprises a plug cover and four ball bolts, the socket mechanism comprises an interface mounting plane, and the four connecting mechanisms are arranged on the interface mounting plane. Each of the four connecting mechanisms comprises two mounting plates and a U-shaped spring piece; a charging plug is fixedly arranged in the center of the rear surface of the front end of the plug cover, and a charging socket is fixedly arranged in the center of the interface mounting plane in a penetrating mode. According to the utility model, the interface enhances durability and waterproof performance while providing additional impact resistance protection, when the plug mechanism is lightly impacted or pulled, the ball head parts of the four ball head bolts can automatically reset and keep stable connection under the action of deformation recovery of the spring damper, and in addition, the plug mechanism has the advantages of simple structure, convenient operation and low cost. The diversion trench between the rainproof cover and the circular truncated cone ring in the socket mechanism effectively prevents water drop gathering, and the waterproof performance of the interface is effectively enhanced.

Description

Technical Field

[0001] This utility model relates to the field of battery charging connection device technology, and in particular to a high-voltage electrical connection device for power battery packs. Background Technology

[0002] A power battery pack is a device capable of storing electrical energy. It converts and stores electrical energy through chemical or physical methods for release when needed. These batteries are widely used in solar and wind power generation, grid energy storage, electric vehicles, and portable electronic devices. They can improve energy efficiency, balance supply and demand, support the integration of renewable energy, and provide emergency power during power outages. The development of battery pack technology is of great significance for promoting energy transition and achieving carbon neutrality goals. The charging interface of an energy storage battery is a key component connecting the battery and the charger. It not only needs to ensure efficient and safe transmission of electrical energy but also possesses good mechanical stability and environmental adaptability to ensure stable operation under various conditions and prevent damage or failure due to poor contact, environmental corrosion, or accidental impact.

[0003] A search revealed an existing patent (publication number: CN220420938U) that discloses a "charging interface, rechargeable battery, and electric vehicle. The charging interface includes a first welding part, a second welding part, and multiple third welding parts. The first, second, and third welding parts are all disposed on the side wall of the housing away from the groove. The first welding part is electrically connected to the negative electrode connection part, the second welding part is electrically connected to the positive electrode connection part, and the third welding parts are electrically connected to conductive metals one-to-one. Connectors are electrically connected to the outer walls of the first, second, and third welding parts, and the upper surface of the connectors is not higher than the upper surfaces of the first, second, and third welding parts. This design avoids the wires being perpendicular to the charging interface, reduces the overall height of the charging interface after welding the wires, and thus reduces the space occupied by the charging interface inside the rechargeable battery, thereby helping to improve the battery's range."

[0004] In the process of developing this application, the inventors discovered the following problems with the prior art: Although the aforementioned comparative patent provides a charging interface, a rechargeable battery, and an electric vehicle by setting components such as a first welding part, a second welding part, and multiple third welding parts, it lacks impact and rainproof mechanisms, making it difficult to meet the requirements for impact resistance and rainproofing at the connection points. Therefore, those skilled in the art have provided a high-voltage electrical connection device for a power battery pack to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-voltage electrical connection device for a power battery pack. This interface provides additional shock protection while enhancing durability and waterproof performance. When the plug mechanism is subjected to a slight impact or pull, the ball heads of the four ball bolts can automatically reset under the action of the spring damper to restore deformation, maintaining a stable connection. In addition, the guide groove between the rain cover and the frustum ring in the socket mechanism effectively prevents water droplet accumulation and effectively enhances the waterproof performance of the interface.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage electrical connection device for a power battery pack, comprising a plug mechanism, a socket mechanism, and four connection mechanisms. The plug mechanism includes a plug cover and four ball-head bolts, the socket mechanism includes an interface mounting plane, and each of the four connection mechanisms includes two mounting plates and a U-shaped spring sheet.

[0007] A charging plug is fixedly provided at the center of the rear surface of the front end of the plug cover. A charging port is fixedly provided through the center of the interface mounting plane. An annular groove is provided on the interface mounting plane at the periphery of the charging port. The charging plug is snapped into the charging port. The eight mounting plates are arranged in groups of two, symmetrically positioned at their rear ends, and respectively snapped into the upper, lower, and side positions of the rear end of the annular groove.

[0008] Furthermore, a cable is fixedly provided at the center of the front end of the plug cover, and the charging plug is electrically connected to the cable through the center of the front end of the plug cover. A rain cover is fixedly provided through the cable body near the plug cover.

[0009] Furthermore, the plug wall has four openings symmetrically arranged near the rear end, and the front ends of the four ball head bolts are respectively fixed to the center of the front ends of the four openings.

[0010] Furthermore, a frustum ring is fixedly installed on the interface mounting plane outside the annular groove, and a rain cover is fixedly installed on the front end of the frustum ring.

[0011] Furthermore, the smaller diameter end of the frustum ring faces forward, the opening of the rain cover is funnel-shaped, and a guide groove is formed at the connection between the frustum ring and the rain cover.

[0012] Furthermore, spring dampers are fixedly installed at the center of each of the two adjacent mounting plates on opposite sides, and the four U-shaped spring plates are respectively fixed between the two adjacent spring dampers.

[0013] Furthermore, the rear ends of the cross sections of the four U-shaped spring sheets are all in the shape of a superior arc, and the diameter of the superior arc at the rear ends of the cross sections of the four U-shaped spring sheets is slightly larger than the diameter of the ball head portion of the four ball head bolts.

[0014] Furthermore, the front ends of the four U-shaped spring sheets gradually narrow from front to back.

[0015] This utility model has the following beneficial effects:

[0016] 1. The high-voltage electrical connection device for the power battery pack proposed in this utility model has an interface in which, after the plug mechanism is inserted into the socket mechanism, when subjected to an accidental impact or pull of a certain degree, as long as the volume of the ball head of the four ball head bolts dislodging from the rear part of the four U-shaped spring pieces does not exceed half the volume of the ball head, the ball head of the four ball head bolts will be re-engaged into the rear part of the U-shaped spring pieces under the restoring deformation action of the spring damper. This provides additional impact protection for the interface, reduces damage to the interface caused by external forces, and enables the interface to automatically recover when subjected to an impact of a certain degree, maintaining the stability of the connection. The design of the four U-shaped spring pieces makes it difficult for the four ball head bolts to dislodge unless continuously pulled by human force, thus significantly improving the durability of the interface, extending its service life, ensuring long-term stable operation of the interface, and ultimately significantly reducing maintenance costs.

[0017] 2. The high-voltage electrical connection device for the power battery pack proposed in this utility model has a guide groove formed between the rain cover and the frustum ring in the socket mechanism of the interface. In the event of rain, water droplets will slide along the outer edge of the rain cover into the guide groove and drip down, effectively preventing water droplets from accumulating on the outer surface of the rain cover, thereby enhancing the waterproof performance of the interface and enabling the charging interface to work normally even in rainy weather conditions, reducing the risk of damage caused by water intrusion. Attached Figure Description

[0018] Figure 1 This is an isometric schematic diagram of the present invention;

[0019] Figure 2 This is an isometric schematic diagram of the plug mechanism of this utility model;

[0020] Figure 3 This is an isometric view of the plug mechanism of this utility model as seen from the rear end;

[0021] Figure 4 This is an isometric schematic diagram of the socket mechanism of this utility model;

[0022] Figure 5 This is an isometric schematic diagram of the four connecting mechanisms of this utility model.

[0023] Legend:

[0024] 1. Plug mechanism; 2. Socket mechanism; 3. Connection mechanism; 101. Cable; 102. Rain cover; 103. Plug cover; 104. Opening; 105. Ball head bolt; 106. Charging plug; 201. Rain cover; 202. Frustum ring; 203. Guide groove; 204. Annular groove; 205. Charging port; 206. Interface mounting plane; 301. Mounting plate; 302. Spring damper; 303. U-shaped spring plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention provides an embodiment of a high-voltage electrical connection device for a power battery pack, comprising a plug mechanism 1, a socket mechanism 2 and four connection mechanisms 3. The plug mechanism 1 includes a plug cover 103 and four ball head bolts 105. The socket mechanism 2 includes an interface mounting plane 206. Each of the four connection mechanisms 3 includes two mounting plates 301 and a U-shaped spring sheet 303.

[0027] A charging plug 106 is fixedly disposed at the center of the rear surface of the front end of the plug cover 103. A charging port 205 is fixedly disposed through the center of the interface mounting plane 206. An annular groove 204 is provided on the interface mounting plane 206 at the periphery of the charging port 205. The charging plug 106 is snapped into the inside of the charging port 205. The eight mounting plates 301 are arranged in groups of two, symmetrically positioned at the rear ends, and respectively snapped into the upper, lower, and side positions of the rear end of the annular groove 204.

[0028] Specifically, the charging port 205 of the socket mechanism 2 provides a good installation position for the charging plug 106 in the plug mechanism 1, and the annular groove 204 in the socket mechanism 2 provides a good installation position for the eight mounting plates 301 in the four connecting mechanisms 3.

[0029] Reference Figure 2 and Figure 3A cable 101 is fixedly installed at the center of the front end of the plug cover 103. The charging plug 106 passes through the center of the front end of the plug cover 103 and is electrically connected to the cable 101. A rain cover 102 is fixedly installed through the cable 101 near the plug cover 103. Four openings 104 are centrally symmetrically opened on the column wall of the plug cover 103 near the rear end. The front ends of the four ball head bolts 105 are respectively fixed to the center of the front ends of the four openings 104.

[0030] Specifically, the four openings 104 in the column wall of the plug 103 provide good installation positions for the four ball head bolts 105.

[0031] Reference Figure 4 The interface mounting plane 206 is fixedly provided with a frustum ring 202 outside the annular groove 204. A rain cover 201 is fixedly provided at the front end of the frustum ring 202. The smaller diameter end of the frustum ring 202 faces forward. The opening of the rain cover 201 is funnel-shaped. A guide groove 203 is formed at the connection between the frustum ring 202 and the rain cover 201.

[0032] Specifically, when in use, after the plug mechanism 1 is inserted into the socket mechanism 2, the rain cover 102 will properly seal the flared opening of the rain cover 201. If the socket mechanism 2 is accidentally splashed with water, the water droplets will slide along the outer edge of the rain cover 201 to the guide groove 203 and then drip down along the guide groove 203, without accumulating on the outer surface of the rain cover 201. If raindrops are blown by the wind to the front end of the rain cover 102, they will gradually slide down after dripping onto the inner surface of the rain cover 201 due to the flared design of the rain cover 201, and will not accumulate on the inner surface of the rain cover 201 before the front end of the rain cover 102.

[0033] Reference Figure 4 and Figure 5 Two adjacent mounting plates 301 are each fixedly provided with a spring damper 302 on the center of opposite side. Four U-shaped spring plates 303 are respectively fixedly provided between two adjacent spring dampers 302. The rear end of the cross section of the four U-shaped spring plates 303 is in the shape of an arc. The diameter of the arc at the rear end of the cross section of the four U-shaped spring plates 303 is slightly larger than the diameter of the ball head portion of the four ball head bolts 105. The front end of the four U-shaped spring plates 303 gradually narrows from front to back.

[0034] Specifically, during use, after the plug mechanism 1 is inserted into the socket mechanism 2, the plug cover 103 is securely engaged inside the annular groove 204. At the same time, the four ball head bolts 105 are securely engaged inside the four U-shaped spring plates 303. During this process, the four ball head bolts 105 pass through the front part of the U-shaped spring plates 303 in sequence, squeezing and causing the opening at the front end of the U-shaped spring plates 303 to expand, which in turn causes the spring damper 302 to shorten. This allows the ball head part to smoothly enter the rear part of the four U-shaped spring plates 303. After the four ball head bolts 105 are securely engaged inside the four U-shaped spring plates 303, the spring damper 302 returns to its initial position, making it difficult for the ball head part of the four ball head bolts 105 to come out unless continuously pulled by human force.

[0035] When the plug mechanism 1 is subjected to an accidental impact or pull of a certain degree in any direction, as long as the ball head of the four ball head bolts 105 does not dislodge more than half the volume of the ball head portion from the rear part of the four U-shaped spring pieces 303, the ball head portion of the four ball head bolts 105 will be properly re-engaged into the four U-shaped spring pieces 303 under the action of the spring damper 302 restoring its deformation, thus ensuring a good connection between the plug mechanism 1 and the socket mechanism 2.

[0036] Working principle: In use, after the plug mechanism 1 is inserted into the socket mechanism 2, the plug cover 103 is securely engaged inside the annular groove 204. Simultaneously, the four ball-head bolts 105 are securely engaged inside the four U-shaped spring plates 303. During this process, the four ball-head bolts 105 pass sequentially through the front portion of the U-shaped spring plates 303, compressing and expanding the opening at the front of the U-shaped spring plates 303, causing the spring damper 302 to shorten. This allows the ball head portion to smoothly enter the rear portion of the four U-shaped spring plates 303. After the four ball-head bolts 105 are securely engaged inside the four U-shaped spring plates 303, the spring... The spring damper 302 returns to its initial position, making it difficult for the ball heads of the four ball pins 105 to come out unless continuously pulled by human force. When the plug mechanism 1 is subjected to an accidental impact or pull of a certain degree in any direction, as long as the volume of the ball heads of the four ball pins 105 that come out of the rear part of the four U-shaped spring plates 303 does not exceed half the volume of the ball heads, under the action of the spring damper 302 restoring its deformation, the ball heads of the four ball pins 105 will be properly re-engaged into the four U-shaped spring plates 303, so that the plug mechanism 1 and the socket mechanism 2 maintain a good connection.

[0037] Secondly, when in use, after the plug mechanism 1 is inserted into the socket mechanism 2, the rain cover 102 will properly seal the flared opening of the rain cover 201. If the socket mechanism 2 is accidentally splashed with water, the water droplets will slide along the outer edge of the rain cover 201 to the guide groove 203 and then drip down along the guide groove 203, without accumulating on the outer surface of the rain cover 201. If raindrops are blown by the wind to the front end of the rain cover 102, they will gradually slide down after dripping onto the inner surface of the rain cover 201 due to the flared design of the rain cover 201, and will not accumulate on the inner surface of the rain cover 201 before the front end of the rain cover 102.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-voltage electrical connection device for a power battery pack, comprising a plug mechanism (1), a socket mechanism (2), and four connection mechanisms (3), characterized in that: The plug mechanism (1) includes a plug cover (103) and four ball head bolts (105), the socket mechanism (2) includes an interface mounting plane (206), and the four connection mechanisms (3) each include two mounting plates (301) and a U-shaped spring sheet (303). A charging plug (106) is fixedly disposed at the center of the rear surface of the front end of the plug cover (103). A charging port (205) is fixedly disposed through the center of the interface mounting plane (206). An annular groove (204) is opened on the interface mounting plane (206) at the outer periphery of the charging port (205). The charging plug (106) is snapped into the inside of the charging port (205). The eight mounting plates (301) are arranged in pairs, with their rear ends symmetrically snapped into the upper, lower and side positions of the rear end of the annular groove (204).

2. The high-voltage electrical connection device for the power battery pack according to claim 1, characterized in that: A cable (101) is fixedly provided at the center of the front end of the plug cover (103). The charging plug (106) passes through the center of the front end of the plug cover (103) and is electrically connected to the cable (101). A rain cover (102) is fixedly provided through the cable (101) near the plug cover (103).

3. The high-voltage electrical connection device for the power battery pack according to claim 1, characterized in that: The plug (103) has four openings (104) symmetrically arranged near the rear end of the column wall, and the front ends of the four ball head bolts (105) are respectively fixed to the center of the front end of the four openings (104).

4. The high-voltage electrical connection device for the power battery pack according to claim 1, characterized in that: The interface mounting plane (206) is located outside the annular groove (204) and a frustum ring (202) is fixedly installed thereon. A rain cover (201) is fixedly installed at the front end of the frustum ring (202).

5. The high-voltage electrical connection device for the power battery pack according to claim 4, characterized in that: The smaller diameter end of the frustum ring (202) faces forward, the opening of the rain cover (201) is flared, and a guide groove (203) is formed at the connection between the frustum ring (202) and the rain cover (201).

6. The high-voltage electrical connection device for the power battery pack according to claim 1, characterized in that: Two adjacent mounting plates (301) are each fixedly provided with a spring damper (302) on the center of opposite side, and four U-shaped spring plates (303) are respectively fixedly provided between the two adjacent spring dampers (302).

7. The high-voltage electrical connection device for the power battery pack according to claim 1, characterized in that: The rear ends of the cross sections of the four U-shaped spring sheets (303) are all in the shape of a superior arc, and the diameter of the superior arc at the rear ends of the cross sections of the four U-shaped spring sheets (303) is slightly larger than the diameter of the ball head portion of the four ball head bolts (105).

8. The high-voltage electrical connection device for the power battery pack according to claim 1, characterized in that: The front ends of the four U-shaped spring sheets (303) gradually narrow from front to back.

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