Electric connector structure for storage battery box

Abstract

An electric connector structure for a storage battery box relates to the technical field of power supply of storage battery boxes under vehicles, and is high in guidance quality, floating resistance and current transmission stability. In the structure of the electric connector for the storage battery box, the insulator is in an integral structure form; the insulator is matched with the contact pin and the jack and is fixed through the clamping jaw, and the guide pin at the butt joint end of the connector is enlarged and lengthened so as to ensure that the guide pin works firstly and the contact pin is contacted with the jack after the guide pin works under the action of external force of the connector.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology for under-vehicle battery boxes, and in particular to a structure for an electrical connector for a battery box. Background Technology

[0002] Currently, most of the battery box connectors produced domestically use imported structures, while there is a gap in the domestic market for battery connectors. In order to support the independent research and development and production of various CRRC systems and realize the strategic layout of localization of key EMU systems, it is necessary to independently carry out research and development on the localization of battery box connectors.

[0003] The inventors of this application have discovered that the following points need to be considered in the development of electrical connectors for battery boxes:

[0004] (1) The battery connector operates in a high-temperature environment;

[0005] (2) The battery box interlocking process requires high precision;

[0006] (3) The battery box connector can withstand a large instantaneous current. Utility Model Content

[0007] The purpose of this utility model is to provide a battery box electrical connector structure with high guiding and anti-floating capabilities, and high current transmission stability.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A battery box electrical connector structure includes: an insulator, wherein the insulator is an integral structure; the insulator cooperates with a pin and a socket and is fixed by a claw, and the guide pin at the connector mating end is enlarged and lengthened to ensure that the guide pin works first under the action of external force, and the pin and the socket contact later.

[0010] In practical applications, the insulator is made of glass fiber reinforced 30% nylon.

[0011] The guide pin and guide hole are made of 304 stainless steel.

[0012] Specifically, the pins and the sockets are made of pure copper plated with silver.

[0013] Furthermore, the battery box has a pin at the front of the trolley, and the pin is equipped with a washer. The washer is used to adjust the front and rear distance to ensure that the connector does not slide back and forth after being inserted.

[0014] The battery box trolley has guide pins and guide holes, and the rollers of the battery box trolley have grooves to limit left and right sliding.

[0015] Compared with the prior art, the electrical connector structure for the battery box described in this utility model has the following advantages:

[0016] In the battery box connector structure provided by this utility model, the insulator cooperates with the pins and sockets and is fixed by claws, thus facilitating quick and easy handling of the contacts and aiding in later maintenance. The enlarged and lengthened guide pins at the connector mating end ensure that the guide pins engage first under external force, followed by contact between the pins and sockets, thereby enabling blind mating and floating mating, and providing high guiding performance. Therefore, the battery box connector structure provided by this utility model exhibits high guiding performance, strong anti-floating capability, and high current transmission stability. Attached Figure Description

[0017] Figure 1 A schematic diagram of the plug structure in the electrical connector structure for a battery box provided in this embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the socket in the electrical connector structure for a battery box provided in an embodiment of the present utility model.

[0019] Figure label:

[0020] 1-Insulator; 2-Pin; 3-Socket; 4-Guide pin. Detailed Implementation

[0021] The electrical connector for battery boxes provided in this embodiment differs from previous connector products. Since the connector is installed on the battery box and moves as a whole with the battery box, the operator cannot observe the insertion state when the plug and socket are inserted, resulting in blind insertion. Therefore, the connector's guiding and anti-floating capabilities are required to be high. Furthermore, since the connector connects to the battery, the instantaneous current requirement is high, and the situation of inserting and removing with pads often occurs. Therefore, in view of the above situations, higher requirements are placed on the current transmission stability of the connector, the floating insertion and removal conditions of the connector are more stringent, and the stability requirements of the connector's own guiding function are more severe.

[0022] For ease of understanding, the structure of the electrical connector for the battery box provided in the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] This utility model embodiment provides a structure for an electrical connector for a battery box, such as... Figure 1 and Figure 2As shown, it includes: an insulator 1, and the insulator 1 is an integral structure; the insulator 1 cooperates with the pin 2 and the socket 3 and is fixed by the claw, and the guide pin 4 at the connector mating end is enlarged and lengthened so as to ensure that the guide pin 4 works first under the action of external force, and the pin 2 and the socket 3 contact later.

[0024] Compared with the prior art, the electrical connector structure for the battery box described in this embodiment of the invention has the following advantages:

[0025] In the battery box connector structure provided by this embodiment of the present invention, since the insulator 1 cooperates with the pin 2 and the socket 3 and is fixed by the claws, the contact body can be easily and quickly picked up and delivered, which is beneficial for later maintenance. Because the guide pin 4 at the connector mating end is enlarged and lengthened, it can ensure that the guide pin 4 works first under external force, and the pin 2 and the socket 3 contact later. Therefore, it can meet the requirements of blind mating and floating mating of the connector, and the connector has high guiding performance. Therefore, it can be seen that the battery box connector structure provided by this embodiment of the present invention has high guiding performance and anti-floating ability, and high current transmission stability.

[0026] In practical applications, the aforementioned insulator 1 can be made of 30% glass fiber reinforced nylon. Glass fiber reinforced nylon 66 (LGFR-PA66) is a material whose mechanical properties are enhanced by adding glass fibers to nylon 66. Nylon 66 itself has excellent mechanical properties, heat resistance, wear resistance, self-lubrication, and certain flame retardancy, but it has strong moisture absorption and poor dimensional stability, which limits its application to some extent. By adding glass fibers, these shortcomings can be effectively improved, especially long glass fiber reinforced nylon 66 (LGFR-PA66), whose mechanical properties are significantly better than those of short glass fiber reinforced nylon 66 (SGFR-PA66), and its molding and processing performance is also better.

[0027] The guide pin 4 and guide hole mentioned above can be made of 304 stainless steel. 304 stainless steel is a widely used general-purpose stainless steel material, known for its excellent rust resistance and corrosion resistance. Its main components include iron, chromium, nickel, and small amounts of carbon and manganese. In particular, the addition of nickel significantly improves the corrosion resistance and mechanical properties of 304 stainless steel, ensuring that no corrosion occurs under long-term working conditions inside the battery box.

[0028] Specifically, the aforementioned pin 2 and socket 3 can be made of pure copper plated with silver. Pure copper has a melting point of 1083℃, excellent electrical conductivity, high strength, high hardness, and good corrosion resistance; silver plating on the surface can enhance the current carrying capacity of the contact, enabling it to maintain operation at the rated current for a long time, with very low contact resistance, making it the most commonly used surface treatment method for high-current contact.

[0029] The pin diameter is φ14, the rated operating current is 350A, and the instantaneous current can reach 380A. Therefore, the battery's maximum instantaneous current does not exceed 380A, and the rated current does not exceed 350A, which is far greater than the battery box's rated current of 200A, providing a certain design redundancy. Through the design of the pin and socket current carrying capacity E, the internal crown spring combination design, the reasonable design of the insertion and extraction force, the control of the process, the guarantee of the silver plating layer thickness, and the self-protection function of the silver plating protectant, the connector can ensure the stability of the contact insertion and extraction force and current carrying capacity after 5000 insertions and extractions.

[0030] Furthermore, the battery box has a pin at the front of the trolley, and the pin can be equipped with a shim. This shim can be used to adjust the front and rear distance to ensure that the connector does not slide back and forth after being inserted.

[0031] The battery box trolley has guide pins and guide holes, and the rollers of the battery box trolley have grooves to limit left and right sliding.

[0032] Because the battery box has eight ventilation openings on the outside for heat dissipation and ventilation of the battery, and the connector is in a high-temperature, drafty position for a long time, the temperature is relatively high. In addition, the connector is located on the support plate of the trolley, and there are multiple limiters on the battery box. Therefore, considering the structure of the battery box and the working environment, it can be determined that the temperature inside the battery box generally does not exceed 75℃ and there is a ventilation system. This does not pose any risk to the connector's performance index of being able to withstand high temperatures of 125℃. Before the connector is connected, the trolley has three anti-misinsertion protection functions, which can effectively ensure that the connector plug and socket are aligned before connection and avoid rigid contact during the connection process. This can effectively protect the stability of the connector's own quality and ensure a longer service life.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A structure for an electrical connector used in a battery box, characterized in that, include: An insulator, wherein the insulator is an integral structure; the insulator mates with the pins and sockets and is fixed by claws, and the guide pins at the connector mating ends are enlarged and lengthened to ensure that the guide pins work first under external force, and the pins and sockets contact later.

2. The electrical connector structure for a battery box according to claim 1, characterized in that, The insulator is made of glass fiber reinforced 30% nylon.

3. The electrical connector structure for a battery box according to claim 1, characterized in that, The guide pin and guide hole are made of 304 stainless steel.

4. The electrical connector structure for a battery box according to claim 1, characterized in that, The pin and the socket are made of pure copper plated with silver.

5. The electrical connector structure for a battery box according to any one of claims 1-4, characterized in that, The battery box has a pin at the front of the trolley, and the pin is equipped with a washer. The washer is used to adjust the front and rear distance to ensure that the connector does not slide back and forth after being inserted. The battery box trolley has guide pins and guide holes, and the rollers of the battery box trolley have grooves to limit left and right sliding.

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