Energy storage male end connector

By designing the combined structure of the housing, fixture and power connection components of the energy storage male connector, the stability problem of the energy storage connector during the plug-in process is solved, stable electrical connection and efficient current transmission are achieved, and the reliability and safety of the connector are improved. It is suitable for high load and high frequency use of energy storage systems.

CN223079502UActive Publication Date: 2025-07-08东莞市典威技术股份有限公司
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Patent Information

Application Number
CN202422124994.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-30
Publication Date
2025-07-08
Estimated Expiration
2034-08-30

AI Technical Summary

Technical Problem

Existing energy storage connectors are prone to stability problems during plug-in use, including misalignment or looseness, which affects the reliability and safety of electrical connections.

Method used

A male energy storage connector is designed, adopting a combined structure of a housing, fixing parts and power connection components, including a power connection plug and a fixing cavity, multiple slots and fixing slots are provided, and the fixing slots and snaps are combined to achieve stable fixation of the components, and the insertion and removal accuracy and sealing are improved through the guide arc surface and sealing slot.

Benefits of technology

It improves the stability and safety of the connector, ensures the stability and efficient transmission of electrical connections, extends the service life, is suitable for high load and high frequency usage conditions, and enhances the reliability and safety of the energy storage system.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of electric connection, in particular to an energy storage male end connector, which comprises a shell, a first fixing piece, a second fixing piece, a third fixing piece, a first power connection element, a second power connection element and a third power connection element, two ends of the shell are respectively provided with a power connection plug and a fixing cavity, the power connection plug is provided with a first slot, a second slot and a third slot, the fixing cavity is provided with a first fixing groove, a second fixing groove and a third fixing groove, and the first fixing piece is arranged in the first fixing groove and is used for fixing a first power connection element; the second fixing piece is arranged in the second fixing groove and is used for fixing the second power connection element; and the third fixing piece is arranged in the third fixing groove and is used for fixing the third power connection element. The utility model has certain guidance quality and insertion guide floatability, and is compact in overall structure, safe and reliable.
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Description

Technical Field

[0001] The utility model relates to the technical field of electrical connection, in particular to a male energy storage connector. Background Art

[0002] A connector is a component that electronic engineering technicians often come into contact with. Its function is to build a communication bridge between a blocked or isolated circuit in a circuit, so that current can flow and the circuit can achieve its intended function.

[0003] An energy storage connector is a connector specifically used for connecting and transmitting electric energy. The main functions of an energy storage connector are to provide current transmission, voltage distribution, and partial protection functions for the system battery pack. It needs to withstand high voltage and large current, and at the same time have a sufficiently low contact resistance to ensure stable current transmission and low energy consumption, and improve the efficiency of the entire energy storage system.

[0004] In the use of existing energy storage connectors, due to structural design reasons, stability problems are likely to occur during plugging and unplugging. As a result, problems such as misalignment or loosening may occur during the plugging process. Therefore, new improvements need to be made to the structure of existing energy storage connectors. Summary of the Utility Model

[0005] To solve the above problems, the utility model provides a male energy storage connector with a compact structure, safety and reliability, which can effectively prevent misalignment or loosening during plugging, and ensure the stability and safety of the connection.

[0006] The technical solution adopted by the utility model is as follows: A male energy storage connector includes a housing, a first fixing member, a second fixing member, a third fixing member, a first electrical connection element, a second electrical connection element, and a third electrical connection element; both ends of the housing are respectively provided with an electrical connection plug and a fixing cavity. The electrical connection plug is provided with a first slot, a second slot, and a third slot. The fixing cavity is provided with a first fixing groove, a second fixing groove, and a third fixing groove. The first fixing member is arranged in the first fixing groove and is used to fix the first electrical connection element, and one end of the first electrical connection element extends into the first slot; the second fixing member is arranged in the second fixing groove and is used to fix the second electrical connection element, and one end of the second electrical connection element extends into the second slot; the third fixing member is arranged in the third fixing groove and is used to fix the third electrical connection element, and one end of the third electrical connection element extends into the third slot.

[0007] For further improvement of the above solution, a plugging guiding platform is arranged on the outer periphery of the electrical connection plug. A first sealing groove is arranged on the plugging guiding platform, and a first sealing ring is arranged in the first sealing groove.

[0008] A further improvement to the above solution is that an installation panel is provided between the power connection plug and the fixed cavity. The installation panel is provided with installation holes. The installation panel is provided with a second sealing groove on the outer periphery of the fixed cavity, and a second sealing ring is installed on the second sealing groove.

[0009] A further improvement to the above solution is that first fixing card slots are provided on both sides of the first fixing groove, and first fixing buckles are provided on both sides of the first fixing member. The first fixing buckles cooperate with the first fixing card slots to fix the first fixing member in the first fixing groove.

[0010] A further improvement to the above solution is that second fixing card slots are provided on both sides of the second fixing groove, and second fixing buckles are provided on both sides of the second fixing member. The second fixing buckles cooperate with the second fixing card slots to fix the second fixing member in the second fixing groove.

[0011] A further improvement to the above solution is that third fixing card slots are provided on both sides of the third fixing groove, and third fixing buckles are provided on both sides of the third fixing member. The third fixing buckles cooperate with the third fixing card slots to fix the third fixing member in the third fixing groove.

[0012] A further improvement to the above solution is that a pressing platform extends from one side of the second fixing buckle, and the pressing platform is an elastic pressing platform.

[0013] A further improvement to the above solution is that a first guiding arc surface is provided at the opening of the first slot, and one end of the first power connection element extends towards the first guiding arc surface; an insulating rubber plug is provided at the end of the first power connection element.

[0014] A further improvement to the above solution is that the second slot is provided with a mating platform, and fixing holes are provided on the mating platform. One end of the second power connection element passes through the fixing holes and extends into the mating platform.

[0015] A further improvement to the above solution is that mating positioning slots are provided on both sides of the mating platform of the second slot; a second guiding arc surface is provided at the opening of the second slot.

[0016] A further improvement to the above solution is that the third slot is provided with a reinforcement platform, and one end of the third power connection element passes through the reinforcement platform and extends into the third slot; a third guiding arc surface is provided at the opening of the third slot.

[0017] A further improvement to the above solution is that the first fixing member is provided with a first terminal pressing groove and a first terminal wiring groove. The first terminal pressing groove and the first terminal wiring groove are coaxially arranged, and the first terminal pressing groove is used to fix the first power connection element in the first fixing groove.

[0018] A further improvement to the above solution is that the second fixing member is provided with a second terminal pressing groove and a second terminal wiring groove, the second terminal pressing groove and the second terminal wiring groove are coaxially arranged, and the second terminal pressing groove is used to fix the second power connection element in the second fixing groove.

[0019] A further improvement to the above solution is that the third fixing member is provided with a third terminal pressing groove and a third terminal wiring groove, the third terminal pressing groove and the third terminal wiring groove are coaxially arranged, and the third terminal pressing groove is used to fix the third power connection element in the third fixing groove.

[0020] The beneficial effects of the present utility model are as follows:

[0021] Compared with the existing energy storage connectors, through the design of components such as the housing, the first fixing member, the second fixing member, and the third fixing member, the connector of the present utility model realizes the fixation of components and precise position control. This structural design enables the connector to maintain a stable electrical connection during use, reducing the shaking and loosening during plugging and unplugging, thereby improving the stability and reliability of the connector. The power connection plug is provided with first, second, and third slots, which cooperate with the corresponding fixing grooves on the fixing cavity to achieve simultaneous transmission of multiple interfaces. This design supports high-throughput electrical transmission, meets the requirements for large current and high power in energy storage systems, and improves the electrical transmission efficiency of the connector. The first, second, and third fixing members respectively fix the first, second, and third power connection elements and extend into the corresponding slots. This design ensures the firm fixation of the power connection elements, avoids the detachment or displacement of the elements during use, and improves the stability and safety of the connector. The fixing grooves in the fixing cavity and the slots on the power connection plug provide precise guidance for the plugging and unplugging operations, enabling the plug to be accurately inserted into the fixing cavity and ensuring the correctness of the electrical connection. This design simplifies the plugging and unplugging operations and improves the convenience and ease of use of the connector. The connector has a reasonable structural design, can reduce the wear caused by frequent plugging and unplugging, and extends the service life of the connector. This helps to reduce the loosening or wear of the connector due to long-term use and improves the reliability and stability of the connector. Through various technical effects such as a compact structure, stability and reliability, multi-interface design, high-throughput transmission, effective fixation of components, precise guidance, and improved durability, the present utility model provides an important guarantee for the overall performance of the energy storage system and meets the stable operation requirements of the connector under high-load and high-frequency use conditions. These effects help to improve the reliability and safety of the energy storage system and provide a reliable solution for connection requirements in different application scenarios. Description of the Drawings

[0022] Figure 1 is a three-dimensional structural schematic diagram of the male energy storage connector of the present utility model;

[0023] Figure 2 is Figure 1 another perspective schematic diagram of the common terminal connector for energy storage in the middle;

[0024] Figure 3 is Figure 1 exploded schematic diagram of the common terminal connector for energy storage in the middle;

[0025] Figure 4 is Figure 1 exploded schematic diagram of another embodiment of the common terminal connector for energy storage in the middle;

[0026] Figure 5 is Figure 1 structural schematic diagram of the housing of the common terminal connector for energy storage in the middle.

[0027] Explanation of reference numerals: housing 1, power connection plug 11, first slot 111, first guiding arc surface 1111, second slot 112, mating platform 1121, fixing hole 1122, mating positioning groove 1123, third slot 113, reinforcement platform 1131, third guiding arc surface 1132, plugging guiding platform 114, first sealing groove 1141, first sealing ring 1142, mounting panel 115, mounting hole 1151, second sealing groove 1152, second sealing ring 1153, fixing cavity 12, first fixing groove 121, first fixing clamping groove 1211, second fixing groove 122, second fixing clamping groove 1221, fixing hole 1122, mating positioning groove 1123, second guiding arc surface 1124, third fixing groove 123, third fixing clamping groove 1231, first fixing member 2, first fixing buckle 21, first terminal pressing groove 22, first terminal wiring groove 23, second fixing member 3, second fixing buckle 31, pressing platform 311, second terminal pressing groove 32, second terminal wiring groove 33, third fixing member 4, third fixing buckle 41, third terminal pressing groove 42, third terminal wiring groove 43, first power connection element 5, insulating rubber plug 51, second power connection element 6, third power connection element 7. Specific embodiments

[0028] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model. As Figures 1 to 5As shown in the figure, in an embodiment of the present utility model, a power storage male connector is involved, including a housing 1, a first fixing member 2, a second fixing member 3, a third fixing member 4, a first power connection element 5, a second power connection element 6, and a third power connection element 7; both ends of the housing 1 are respectively provided with a power connection plug 11 and a fixing cavity 12, the power connection plug 11 is provided with a first slot 111, a second slot 112, and a third slot 113, the fixing cavity 12 is provided with a first fixing groove 121, a second fixing groove 122, and a third fixing groove 123, the first fixing member 2 is arranged in the first fixing groove 121 and is used to fix the first power connection element 5, and one end of the first power connection element 5 extends into the first slot 111; the second fixing member 3 is arranged in the second fixing groove 122 and is used to fix the second power connection element 6, and one end of the second power connection element 6 extends into the second slot 112; the third fixing member 4 is arranged in the third fixing groove 123 and is used to fix the third power connection element 7, and one end of the third power connection element 7 extends into the third slot 113. Through the design of components such as the housing 1, the first fixing member 2, the second fixing member 3, and the third fixing member 4 in this embodiment, the connector realizes the fixing of components and precise position control. This structural design enables the connector to maintain a stable electrical connection during use, reduce the shaking and loosening during plugging and unplugging, thereby improving the firmness and reliability of the connector. The power connection plug 11 is provided with the first, second, and third slots 113, which cooperate with the corresponding fixing grooves on the fixing cavity 12 to realize simultaneous transmission of multiple interfaces. This design supports high-throughput electrical transmission, is suitable for the requirements of large current and high power in the energy storage system, and improves the electrical transmission efficiency of the connector. The first, second, and third fixing members 4 respectively fix the first, second, and third power connection elements 7 and extend into the corresponding slots. This design ensures the firm fixing of the power connection elements, avoids the falling off or displacement of the elements during use, and improves the stability and safety of the connector. The fixing grooves in the fixing cavity 12 and the slots on the power connection plug 11 provide precise guidance for the plugging and unplugging operations, enabling the plug to be accurately inserted into the fixing cavity 12 and ensuring the correctness of the electrical connection. This design simplifies the plugging and unplugging operations and improves the convenience and ease of use of the connector. The connector has a reasonable structural design, can reduce the wear caused by frequent plugging and unplugging, and extends the service life of the connector. This helps to reduce the loosening or wear of the connector due to long-term use and improves the reliability and stability of the connector. Through various technical effects such as compact structure, firmness and reliability, multi-interface design, high-throughput transmission, effective fixing of components, precise guidance, and improved durability in this embodiment, it provides an important guarantee for the overall performance of the energy storage system and meets the stable operation requirements of the connector under high-load and high-frequency use conditions. These effects help to improve the reliability and safety of the energy storage system and provide a reliable solution for the connection requirements in different application scenarios.

[0031] An insertion guiding platform 114 is provided on the outer periphery of the power connection plug 11. A first sealing groove 1141 is provided on the insertion guiding platform 114, and a first sealing ring 1142 is provided in the first sealing groove 1141. Specifically, an installation panel 115 is provided between the power connection plug 11 and the fixed cavity 12. Installation holes 1151 are provided on the installation panel 115. A second sealing groove 1152 is provided on the outer periphery of the installation panel 115 located in the fixed cavity 12, and a second sealing ring 1153 is installed in the second sealing groove 1152. In this embodiment, through the insertion guiding platform 114, the first sealing groove 1141 and the first sealing ring 1142 provided on the outer periphery of the power connection plug 11, and the installation holes 1151, the second sealing groove 1152 and the second sealing ring 1153 provided on the installation panel 115 of the fixed cavity 12, a double-sealing design is achieved. Such a structural design can effectively prevent external environmental substances such as dust and water vapor from entering the interior of the connector, improve the sealing performance of the connector, protect the internal electrical components from the influence of the external environment, and improve the reliability and stability of the connector. Through the setting of the installation panel 115 and the installation holes 1151, and the installation of the second sealing groove 1152 and the second sealing ring 1153, a safe and reliable fixed assembly between the fixed cavity 12 and the power connection plug 11 is achieved. This design ensures that the connector will not cause poor electrical connection or safety hazards due to loosening or displacement during use, and improves the safety and stability of the connector. The setting of the sealing groove and the sealing ring can effectively prevent electric leakage and electrical failures. Especially in a humid or polluted environment, it can effectively prevent moisture and impurities from penetrating into the interior of the connector, reduce the risk of electric leakage caused thereby, and improve the safety and reliability of the connector. The double-sealing design and the safe and reliable fixed assembly can reduce the damage and aging of the internal components of the connector, extend the service life of the connector. This helps to reduce the failures or damages that occur to the connector due to long-term use, and improves the reliability and stability of the connector.

[0032] On both sides of the first fixing groove 121, there are first fixing card slots 1211. On both sides of the first fixing member 2, there are first fixing clasps 21. The first fixing clasps 21 cooperate with the first fixing card slots 1211 to fix the first fixing member 2 in the first fixing groove 121. Specifically, on both sides of the second fixing groove 122, there are second fixing card slots 1221. On both sides of the second fixing member 3, there are second fixing clasps 31. The second fixing clasps 31 cooperate with the second fixing card slots 1221 to fix the second fixing member 3 in the second fixing groove 122. On both sides of the third fixing groove 123, there are third fixing card slots 1231. On both sides of the third fixing member 4, there are third fixing clasps 41. The third fixing clasps 41 cooperate with the third fixing card slots 1231 to fix the third fixing member 4 in the third fixing groove 123. In this embodiment, through the design of the first fixing card slots 1211, the first fixing clasps 21, the second fixing card slots 1221, the second fixing clasps 31, the third fixing card slots 1231 and the third fixing clasps 41, the firm fixation of the first fixing member 2, the second fixing member 3 and the third fixing member 4 is realized. This structural design ensures that the connector will not cause poor electrical connection or safety hazards due to loosening or displacement during use, improving the safety and stability of the connector. The cooperative design of the fixing card slots and the fixing clasps makes the installation and maintenance of the connector more convenient. This design simplifies the disassembly and replacement process of the connector assembly, improving the maintainability and usability of the connector. The cooperative design of the fixing card slots and the fixing clasps effectively reduces the loosening of the connector in a vibrating environment, improving the stability and reliability of the connector, especially having obvious advantages in applications in high-vibration environments such as industrial equipment.

[0033] On one side of the second fixing clasp 31, there extends a pressing platform 311. The pressing platform 311 is an elastic pressing platform 311. In this embodiment, by designing the pressing platform 311 as an elastic pressing platform 311, it is convenient for the assembly of the second fixing member 3.

[0034] At the opening of the first slot 111, a first guiding arc surface 1111 is provided, and one end of the first electrical connection element 5 extends towards the first guiding arc surface 1111; an insulating rubber plug 51 is provided at the end of the first electrical connection element 5. The second slot 112 is provided with a mating platform 1121, and fixing holes 1122 are provided on the mating platform 1121. One end of the second electrical connection element 6 passes through the fixing holes 1122 and extends into the mating platform 1121. On both sides of the mating platform 1121 of the second slot 112, mating positioning grooves 1123 are provided; at the opening of the second slot 112, a second guiding arc surface 1124 is provided. Specifically, the third slot 113 is provided with a reinforcement platform 1131. One end of the third electrical connection element 7 passes through the reinforcement platform 1131 and extends into the third slot 113; at the opening of the third slot 113, a third guiding arc surface 1132 is provided. In this embodiment, through the design of the first guiding arc surface 1111, the second guiding arc surface 1124 and the third guiding arc surface 1132, effective guiding of the first electrical connection element 5, the second electrical connection element 6 and the third electrical connection element 7 is achieved. This structural design makes the plugging process more accurate and stable, reduces the damage risk caused by misoperation, and improves the reliability and safety of the connector. An insulating rubber plug 51 is provided at the end of the first electrical connection element 5, which can effectively protect the end of the element from the external environment and mechanical damage. This helps to prevent failures caused by the intrusion of external substances or mechanical wear of the element, and improves the stability and durability of the connector. Through the design of the mating platform 1121, the fixing holes 1122, the mating positioning grooves 1123 and the reinforcement platform 1131, etc., firm fixation of the second electrical connection element 6 and the third electrical connection element 7 is achieved. This design ensures that the connector will not cause poor electrical connection or safety hazards due to loosening or displacement during use, and improves the safety and stability of the connector.

[0035] The first fixing member 2 is provided with a first terminal pressing groove 22 and a first terminal wiring groove 23. The first terminal pressing groove 22 and the first terminal wiring groove 23 are coaxially arranged. The first terminal pressing groove 22 is used to fix the first power connection element 5 in the first fixing groove 121. Specifically, the second fixing member 3 is provided with a second terminal pressing groove 32 and a second terminal wiring groove 33. The second terminal pressing groove 32 and the second terminal wiring groove 33 are coaxially arranged. The second terminal pressing groove 32 is used to fix the second power connection element 6 in the second fixing groove 122. The third fixing member 4 is provided with a third terminal pressing groove 42 and a third terminal wiring groove 43. The third terminal pressing groove 42 and the third terminal wiring groove 43 are coaxially arranged. The third terminal pressing groove 42 is used to fix the third power connection element 7 in the third fixing groove 123. In this embodiment, through the design of the first terminal pressing groove 22, the second terminal pressing groove 32 and the third terminal pressing groove 42, the firm fixation of the first power connection element 5, the second power connection element 6 and the third power connection element 7 is realized. This structural design ensures the firmness and reliability of the electrical connection, reduces the risk of failures caused by poor connection, and improves the safety and stability of the connector. The settings of the first terminal wiring groove 23, the second terminal wiring groove 33 and the third terminal wiring groove 43 provide a convenient operation space for wiring, making the wiring installation simpler and faster. This design simplifies the wiring installation process of the connector and improves the maintainability and usability of the connector. The firm electrical connection design can reduce the wear caused by frequent plugging and unplugging, and extends the service life of the connector. This helps to reduce the loosening or wear of the connector due to long-term use, and improves the reliability and stability of the connector.

[0036] The above embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A common energy storage terminal connector, characterized in that: It includes a housing, a first fixing member, a second fixing member, a third fixing member, a first electrical connection element, a second electrical connection element, and a third electrical connection element; both ends of the housing are respectively provided with an electrical connection plug and a fixing cavity, the electrical connection plug is provided with a first slot, a second slot, and a third slot, the fixing cavity is provided with a first fixing groove, a second fixing groove, and a third fixing groove, the first fixing member is arranged in the first fixing groove and is used to fix the first electrical connection element, and one end of the first electrical connection element extends into the first slot; the second fixing member is arranged in the second fixing groove and is used to fix the second electrical connection element, and one end of the second electrical connection element extends into the second slot; the third fixing member is arranged in the third fixing groove and is used to fix the third electrical connection element, and one end of the third electrical connection element extends into the third slot.

2. The energy storage common terminal connector according to claim 1, wherein: An insertion guiding platform is arranged on the outer periphery of the electrical connection plug, a first sealing groove is arranged on the insertion guiding platform, and a first sealing ring is arranged in the first sealing groove.

3. The energy storage male connector according to claim 1, characterized in that: An installation panel is arranged between the electrical connection plug and the fixing cavity, installation holes are arranged on the installation panel, a second sealing groove is arranged on the outer periphery of the installation panel located in the fixing cavity, and a second sealing ring is installed in the second sealing groove.

4. The energy storage common terminal connector according to claim 1, wherein: First fixing card slots are arranged on both sides of the first fixing groove, first fixing buckles are arranged on both sides of the first fixing member, and the first fixing buckles cooperate with the first fixing card slots to fix the first fixing member in the first fixing groove; Second fixing card slots are arranged on both sides of the second fixing groove, second fixing buckles are arranged on both sides of the second fixing member, and the second fixing buckles cooperate with the second fixing card slots to fix the second fixing member in the second fixing groove; Third fixing card slots are arranged on both sides of the third fixing groove, third fixing buckles are arranged on both sides of the third fixing member, and the third fixing buckles cooperate with the third fixing card slots to fix the third fixing member in the third fixing groove.

5. The energy storage common terminal connector according to claim 4, characterized in that: A pressing platform extends from one side of the second fixing buckle, and the pressing platform is an elastic pressing platform.

6. The energy storage male connector according to claim 1, characterized in that: A first guiding arc surface is arranged at the opening of the first slot, and one end of the first electrical connection element extends towards the first guiding arc surface; an insulating rubber plug is arranged at the end of the first electrical connection element.

7. The energy storage male connector according to claim 6, wherein: The second slot is provided with a mating platform, fixing holes are arranged on the mating platform, and one end of the second electrical connection element passes through the fixing holes and extends into the mating platform.

8. The energy storage common terminal connector according to claim 7, wherein: Mating positioning slots are arranged on both sides of the second slot where the mating platform is located; a second guiding arc surface is arranged at the opening of the second slot.

9. The energy storage male connector according to claim 8, wherein: The third slot is provided with a reinforcing platform, one end of the third electrical connection element passes through the reinforcing platform and extends into the third slot; a third guiding arc surface is arranged at the opening of the third slot.

10. The energy storage common terminal connector according to claim 1, characterized in that: The first fixing member is provided with a first terminal pressing groove and a first terminal wiring groove, the first terminal pressing groove and the first terminal wiring groove are coaxially arranged, and the first terminal pressing groove is used to fix the first electrical connection element in the first fixing groove; The second fixing member is provided with a second terminal pressing groove and a second terminal wiring groove. The second terminal pressing groove and the second terminal wiring groove are coaxially arranged. The second terminal pressing groove is used to fix the second power connection element in the second fixing groove; The third fixing member is provided with a third terminal pressing groove and a third terminal wiring groove. The third terminal pressing groove and the third terminal wiring groove are coaxially arranged. The third terminal pressing groove is used to fix the third power connection element in the third fixing groove.