WO2023093611A1

WO2023093611A1 - Switch structure for charging gun, charging gun, and charging device

Info

Publication number: WO2023093611A1
Application number: PCT/CN2022/132558
Authority: WO
Inventors: 王超
Original assignee: 长春捷翼汽车科技股份有限公司
Priority date: 2021-11-29
Filing date: 2022-11-17
Publication date: 2023-06-01
Also published as: CN114050434A

Abstract

A switch structure for a charging gun, a charging gun, and a charging device. The switch structure comprises a terminal fixing device (100), at least one charging terminal (101), at least one adapter terminal (102), at least one power supply terminal (104), and a push rod (107); the terminal fixing device (100) is axially provided with at least two cavities; the charging terminal (101) is at least partially arranged in the cavities; one end of the adapter terminal (102) is electrically connected to the charging terminal (101), and the other end of the adapter terminal (102) is provided with a first contact (105); one end of the power supply terminal (104) is provided with a second contact (106), and the other end of the power supply terminal (104) is electrically connected to a cable of the charging gun; the push rod (107) is at least partially arranged in the cavities, and translates along the axial direction in the cavities; the push rod (107) is configured to control the adapter terminal (102) to translate along the axial direction, such that the first contact (105) is in contact with or separated from the second contact (106). According to the switch structure for a charging gun, when the charging gun does not charge a new energy vehicle, the charging terminal of the charging gun is not electrified, such that electric shock of persons is prevented.

Description

A switch structure for charging gun, charging gun and charging device

This application claims the priority of the Chinese patent submitted on November 29, 2021, with the application number 202111429999.8, and the title of the invention is "a switch structure for charging gun, charging gun and charging device". All the contents of the patent are in This is all imported.

technical field

The present disclosure relates to the technical field of new energy vehicle charging equipment, and more specifically, to a switch structure for a charging gun, a charging gun and a charging device.

Background technique

With the introduction of national energy conservation and emission reduction policies and the increasing advancement of technology, new energy charging vehicles have become popular. Therefore, for charging guns that charge new energy vehicles, safety is the most important factor. At present, charging guns are generally It is set to high current and high power. Electricity safety is particularly important for users and producers. How to improve a switch structure for charging guns. In the case of the charging terminal of the charging gun head, it will not cause electric shock, and it also has waterproof effect. Therefore, how to prevent the charging terminal of the charging gun head from being charged, and at the same time, a switch structure for charging guns with waterproof function Become a technical problem that needs to be solved urgently in this field.

Contents of the invention

The purpose of the present invention is to provide a new technical solution for the switch structure of the charging gun.

According to the first aspect of the present invention, a switch structure for a charging gun is provided, comprising:

A terminal fixing device, the terminal fixing device is axially provided with at least two cavities;

at least one charging terminal disposed at least partially within the cavity;

At least one transfer terminal, one end of the transfer terminal is electrically connected to the charging terminal, and the other end is provided with a first contact;

At least one power terminal, one end of the power terminal is provided with a second contact, and the other end is electrically connected to the cable of the charging gun;

a push rod, the push rod is at least partially disposed in the cavity and is disposed in the axial direction in the cavity;

The push rod is configured to control the transfer terminal to translate in the axial direction, so that the first contact is in contact with or separated from the second contact.

According to the second aspect of the present invention, there is provided a charging gun, including the above-mentioned switch structure and housing for the charging gun, the terminal fixing device, the power terminal fixing device and the cable are fixed on the inside the shell. According to the third aspect of the present invention, there is provided a charging device, including the charging gun as described above, and a charging socket matched with the charging gun, and a ejector rod is arranged in the charging socket. When the charging gun is connected to the When the charging socket is mated, the ejector rod abuts against the push rod and pushes the push rod to translate in the axial direction, thereby driving the first contact to contact the second contact.

A switch structure for a charging gun according to the present disclosure has the following effects:

1. Through the switch structure for the charging gun of the present invention, when the charging gun head is not charging the new energy vehicle, the charging terminal of the charging gun is not charged, preventing people from getting an electric shock.

2. In the prior art, a circuit board is used in the charging gun to control the charging terminal of the charging gun to be uncharged. Through the switch structure for the charging gun of the present invention, no circuit board is needed, and the production cost is reduced.

3. Through the switch structure for the charging gun of the present invention, when there is a small amount of accumulated water at the end of the charging gun, it is prevented that the accumulated water enters the inside of the charging gun, affecting the normal use of the charging gun, and avoiding short circuits caused by accumulated water, causing personnel Casualties and fire accidents.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is an exploded view of a switch structure for a charging gun of the present invention;

Fig. 2 is the schematic diagram of transfer terminal and power supply terminal in the present invention;

3 is a perspective view of a switch structure for a charging gun of the present invention;

Fig. 4 is a side view of the switch structure for the charging gun of the present invention;

Fig. 5 is the structural representation of sealing sleeve of the present invention;

Figure 6 is a longitudinal sectional view of the sealing sleeve of the present invention;

The diagram is marked as follows:

100-terminal fixing device; 101-charging terminal; 102-transfer terminal; 103-second through hole; 104-power terminal; 105-first contact; 106-second contact; 107-push rod; 108- Fixed part; 109-sliding part; 110-resetting part; 111-seal cover; 112-first through hole; 113-seal sleeve; 114-seal compression ring; 117-Seal extension; 118-Push bracket; 119-First fixed part; 120-Charging terminal connector; 121-Power terminal connector; 122-Power terminal fixing device; 123-Second fixing part; 124-Transfer Terminal connector; 125-cable connector; 126-sliding limit part; 127-sliding groove; 128-elastic sheet.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have different values.

A switch structure for a charging gun of the present disclosure, as shown in FIGS. 1 to 6 , includes:

A terminal fixing device 100, the terminal fixing device 100 is axially provided with at least two cavities;

At least one charging terminal 101, the charging terminal 101 is at least partially disposed in the cavity;

At least one transfer terminal 102, one end of the transfer terminal 102 is electrically connected to the charging terminal 101, and the other end is provided with a first contact 105;

At least one power terminal 104, one end of the power terminal 104 is provided with a second contact 106, and the other end is electrically connected to the cable of the charging gun;

a push rod 107, the push rod 107 is at least partially disposed in the cavity and translates in the axial direction in the cavity;

The push rod 107 is configured to control the translation of the transfer terminal 102 along the axial direction, so as to make the first contact 105 contact or separate from the second contact 106 .

During specific implementation, as shown in Fig. 1, Fig. 3 and Fig. 4, by separating the adapter terminal 102 from the power supply terminal 104, it can be ensured that the side of the charging terminal in the non-working state is not charged, which can prevent personnel from getting an electric shock and avoid the occurrence of At the same time, the charging gun in the prior art uses a circuit board to control the charging terminal 101 to be uncharged, and through a switch structure for the charging gun of the present invention, there is no need to use a circuit board, which reduces production costs. Moreover, by setting the push rod 107, when the charging gun is charging the new energy vehicle, the push rod 107 can be pushed to move toward the power terminal 104, so that the first contact 105 is in contact with the second contact 106 to realize electrical conduction, and the charging gun and the second contact 106 can be electrically connected. During the separation process of the new energy vehicle, the push rod 107 is driven to move in a direction away from the power terminal 104, and the push rod 107 drives the transfer terminal 102 to move, so that the first contact 105 is separated from the second contact 106, realizing charging gun After being separated from the new energy vehicle, the charging terminal 101 of the charging gun is not charged. Through the mechanical structure, the charging terminal 101 is not charged when it is not working. Compared with using a circuit board to control the charging terminal 101, it is cost-saving and practical. stronger.

In practical applications, the cavities provided in the axial direction of the terminal fixing device 100 are all cavities with openings at both ends, and at least part of each charging terminal 101 passes through the corresponding cavity, and the charging terminal 101 is close to the transfer terminal 102 One end protrudes from the side of the terminal fixing device 100 close to the transfer terminal 102 .

According to a switch structure for a charging gun of the present disclosure, the contact resistance between the first contact 105 and the second contact 106 is less than 9mΩ.

In general, a large current needs to be turned on. If the contact resistance between the first contact 105 and the second contact 106 is greater than 9mΩ, a large temperature rise will be generated at the contact position, and as time increases, the temperature It will become higher and higher, and the transfer terminal 102 and the power terminal 104 will cause internal stress due to the mechanical deformation caused by the temperature rise. The melting of the first contact 105 and the second contact 106 causes the two to be inseparable, and the contact or separation between the first contact 105 and the second contact 106 cannot be realized according to the setting, or because the first contact 105 and the second contact The melting of the contact 106 will cause the two to be inseparable, and even cause damage to the power supply of the new energy vehicle due to the virtual connection, and even cause the side of the charging terminal 101 to be charged due to the inability to separate the two, resulting in casualties due to the contact. Therefore, the inventors set the contact resistance after the first contact 105 contacts the second contact 106 to be less than 9mΩ.

In order to verify the influence of the contact resistance between the first contact 105 and the second contact 106 on the temperature rise and conductivity of the two, the inventor selects the same first contact 105 and the second contact 106 with different contact resistance , and conduct conductivity and temperature rise tests.

The conductivity test is to test the conductivity of the corresponding contact after the first contact 105 is in contact with the second contact 106, and the conductivity is greater than 99% in this embodiment.

The temperature rise test is to pass the same current to the connection structure formed by the first contact 105 and the second contact 106, and detect the temperature at the same position of the second contact 106 before electrification and after temperature stabilization in a closed environment, and Take the difference and take the absolute value. In this embodiment, a temperature rise greater than 50K is considered unqualified.

Table 1, Effect of different contact resistances between the first contact and the second contact on conductivity and temperature rise

It can be seen from Table 1 that when the contact resistance between the first contact 105 and the second contact 106 is greater than 9mΩ, the temperature rise at the contact between the first contact 105 and the second contact 106 exceeds 50K, and at the same time, the The conductivity of the contact between the first contact 105 and the second contact 106 is also less than 99%, which does not meet the standard requirements. Therefore, the inventors set the contact resistance after the first contact 105 contacts the second contact 106 to be less than 9mΩ.

A switch structure for a charging gun of the present disclosure, the switch structure further includes a telescopic piece, one end of the telescopic piece is connected to the charging terminal 101 , and the other end is connected to the transfer terminal 102 .

Further, the telescopic member is configured as a stretched spring-shaped conductive wire, and the stretched spring-shaped conductive wire exerts a force on the transfer terminal 102 away from the power terminal 104 .

Further, the telescopic member is configured as a relative sliding device, and the relative sliding device includes a fixed part 108 and a sliding part 109, and the fixed part 108 is arranged at one end of the charging terminal 101 adjacent to the transfer terminal 102 , the sliding portion 109 is disposed at one end of the transfer terminal 102 adjacent to the charging terminal 101 , the sliding portion 109 slides relative to the fixing portion 108 and is connected in contact.

During specific implementation, by setting the telescopic member, during the reciprocating movement of the push rod 107, the transfer terminal 102 is realized in the process of approaching the power terminal 101 or away from the power terminal 101, ensuring that the charging terminal 101 is not separated from the transfer terminal 102, It is ensured that when the first contact 105 is in contact with the second contact 106, the charging terminal 101 is not separated from the transfer terminal 102, and the circuit is turned on.

During specific implementation, the telescopic member can be set as a stretching spring-like conductive wire, or as a relative sliding device, the relative sliding device includes a fixed part 108 and a sliding part 109, and the rotation is realized by the elastic force of the stretching spring-like conductive wire. During the movement of the connection terminal 102 towards the power supply terminal 104, displacement changes can occur between the transfer terminal 102 and the charging terminal 101, and the two are not separated to ensure electrical conduction; by setting a relative sliding device, the fixed part 108 and the sliding part The sliding and non-separating cooperation between 109 can realize electrical conduction when the transfer terminal 102 moves toward the power terminal 104 and the displacement between the transfer terminal 102 and the charging terminal 101 changes.

Further, the contact resistance of the fixed part 108 after contact with the sliding part 109 is less than 9mΩ.

Generally, a large current needs to be conducted. If the contact resistance between the fixed part 108 and the sliding part 109 is greater than 9mΩ, a large temperature rise will be generated at the contact position, and the temperature will increase with time. The higher the temperature rise, the fixed part 108 and the sliding part 109 will generate internal stress due to the mechanical deformation caused by the temperature rise. The contact point 105 and the second contact point 106 are virtual connected or cannot be separated, and the contact or separation of the first contact point 105 and the second contact point 106 cannot be realized according to the setting, or because the first contact point 105 and the second contact point 105 A false connection at point 106 may even cause damage to the power supply of the new energy vehicle due to the false connection, and may even cause the side of the charging terminal 101 to be charged due to the inability to separate the two, resulting in casualties due to electric shock. Therefore, the inventors set the contact resistance of the fixed part 108 and the sliding part 109 to be less than 9 mΩ.

In order to verify the influence of the contact resistance between the fixed part 108 and the sliding part 109 on the temperature rise and conductivity of the two, the inventor selected the same fixed part 108 and the sliding part 109 with different contact resistances, and conducted conductivity and temperature rise test.

The electrical conductivity test is to test the electrical conductivity of the corresponding connection after the fixed part 108 is in contact with the sliding part 109 , and the electrical conductivity is greater than 99% in this embodiment.

The temperature rise test is to pass the same current to the connection structure formed by the fixed part 108 and the sliding part 109, and detect the temperature of the same position of the sliding part 109 before power-on and after the temperature is stabilized in a closed environment, and take the absolute value as the difference. In this embodiment, a temperature rise greater than 50K is considered unqualified.

Table 2, the influence of different contact resistances between the fixed part 108 and the sliding part 109 on the conductivity and temperature rise

It can be seen from Table 2 that when the contact resistance between the fixed part 108 and the sliding part 109 is greater than 9mΩ, the temperature rise at the contact point between the fixed part 108 and the sliding part 109 exceeds 50K. The electrical conductivity is also less than 99%, which does not meet the standard requirements. Therefore, the inventors set the contact resistance after the fixed part 108 contacts the sliding part 109 to be less than 9 mΩ.

A switch structure for a charging gun of the present disclosure, the switch structure further includes a reset member 110, and the reset member 110 is configured to provide the transfer terminal 102 with a direction away from the power terminal 101 Force, so that the first contact 105 is separated from the second contact 106 .

During specific implementation, by setting the reset member 110, it can be ensured that the first contact 105 is separated from the second contact 106 when the charging gun is in a non-working state, and the second contact 105 is separated from the second contact 106 without applying external force to the push rod 107. The first contact 105 is always separated from the second contact 106, so that the charging terminal 101 is not charged, and avoids electric shock accidents.

Further, the elastic coefficient of the reset member 110 is 0.6N/mm to 7.4N/mm.

During specific implementation, the elastic coefficient of the reset member determines whether the reset member can contact or separate the first contact 105 and the second contact 106 according to the setting. If the elastic coefficient is too large, the charging gun using this switch structure will not be able to match the charging receiving end of the new energy vehicle used, resulting in the inability to charge the new energy vehicle, or even if the charging gun using this switch structure can be compatible with With the charging receiving end of the new energy vehicle, because the elastic coefficient of the reset member 110 is too large, the first contact 105 cannot be in contact with the second contact 106; if the elastic coefficient is too small, the reset member 110 cannot be driven The transfer terminal 102 moves, and the separation of the first contact 105 and the second contact 106 cannot be realized, which will cause one end of the charging terminal 101 of the charging gun to be charged.

In order to test the influence of the elastic coefficient of the reset member 110 on whether the first contact 105 and the second contact 106 are separated or in contact, the inventor has carried out a related test. The test method is to select the reset member 110 with different elastic coefficients. The other parts are the same. Test whether the charging gun with this switch structure can be plugged and matched with the charging receiving end of the new energy vehicle. If it cannot be matched, it is unqualified. Since the first contact 105 and the second contact 106 cannot be connected, the current conduction inside the charging gun cannot be realized, and the new energy vehicle cannot be charged. This situation is also considered unqualified; In the charging gun that is compatible with the car plug and can charge the new energy vehicle, after the charging gun is separated from the new energy vehicle, use an electric pen to test whether the charging terminal 101 of the charging gun is charged. If it is charged, it is unqualified; the results are shown in Table 3. Show.

Table 3, the influence of the elastic coefficient of the reset member on whether the first contact and the second contact are separated or in contact

It can be seen from Table 3 that when the elastic coefficient of the reset part is greater than 7.4N/mm, there are situations where the charging gun cannot cooperate with the charging receiving end of the new energy vehicle, and even if the two can cooperate, there are cases where the charging gun cannot be used for the new energy vehicle. In the case of charging, therefore, the experimental result at this time is unqualified; when the elastic coefficient of the reset part is less than 0.6N/mm, there is a case where the charging terminal 101 of the charging gun is charged after the charging gun is separated from the charging receiving end of the new energy vehicle , so, the experimental result at this time is also unqualified; therefore, the inventor chooses the elastic coefficient of the reset member to be 0.6N/mm to 7.4N/mm.

Further, the reset member 110 is a compressed elastic member, and the compressed elastic member is insulated and connected between the transfer terminal 102 and the power terminal 104 .

During specific implementation, by disposing the compression elastic member between the transfer terminal 102 and the power supply terminal 104, when the push rod 107 pushes the transfer terminal 102 to move toward the power supply terminal, the compression elastic member is compressed After the deformation occurs and the charging gun is separated from the electrical equipment (for example, a new energy vehicle), in the process of compressing the elastic member to return to its original shape, a force away from the power terminal 104 is applied to the transfer terminal 102, so that the first contact 105 and the second contact The two contacts 106 are separated.

During specific implementation, the two ends of the compressed elastic member can be respectively fixed on one side of the transfer terminal 101 and the side of the power terminal 104, or one end of the compressed elastic member can be fixedly connected to the transfer terminal 101 or the power terminal 104, and the other end can be connected to the opposite end. Alternatively, a groove is provided on the side of the transfer terminal 101 and the side of the power terminal 104, and the two ends of the compression elastic member are abutted in the groove, so that the first contact 105 and the first contact 105 can be separated by the compression elastic member. The function of the second contact 106 is not limited here as to which method the inventor uses.

Further, the reset member 110 is a tensile elastic member, and the tensile elastic member is insulated and fixedly connected between the transfer terminal 102 and the terminal fixing device 100, and/or, the tensile elastic member It is configured as a tension spring-like wire, one end of which is connected to the charging terminal 101 , and the other end is connected to the transfer terminal 102 .

During specific implementation, the reset member 110 can also be set as a stretching elastic member, and by fixing the stretching elastic member between the terminal fixing device 100 and the transfer terminal 102, the push rod 107 pushes the transfer terminal 102 toward the power terminal During the movement of 101, the tensile elastic member is stretched and deformed. After the charging gun is separated from the electric device (for example, a new energy vehicle) and the stretched elastic member is restored to its original shape, apply a force far away from the power supply to the transfer terminal 102. The force of the terminal 104 separates the first contact 105 from the second contact 106, thereby ensuring that the charging terminal 101 is not charged when the charging gun is in a non-working state.

Further, the terminal fixing device 100 is also provided with a sealing cover 111 on the side close to the transfer terminal 102, the sealing cover 111 is fixed on the terminal fixing device 100, and is connected with the terminal fixing device 100 Sealed connection: a first through hole 112 is set on the sealing cover 111 corresponding to the charging terminal 101, and a sealing ring is set in the first through hole 112, and the sealing ring connects the charging terminal 101 to the charging terminal 101. Seal between the side walls of the first through hole 112.

Further, as shown in Fig. 1, Fig. 5 and Fig. 6, a second through hole 103 is provided on the sealing cover 111 corresponding to the position of the push rod 107, and the second through hole 103 is also provided with the The sealing sleeve 113 sealed by the second through hole 103 , the central part of the sealing sleeve 113 follows the push rod in translation.

During specific implementation, the switch structure is also provided with a sealing sleeve compression ring 114. The sealing sleeve 113 includes a cylinder body 115 and an annular sealing ring 116 sleeved on the cylinder body 115. The inner wall of the annular sealing ring 116 It is connected with the opening edge of the cylinder 115 through a sealing extension 117, and the sealing extension 117 covers part of the cylinder 115; the sealing sleeve pressing ring 114 fixes the two side walls of the annular sealing ring 116 on the Between the sealing cover 111 and the sealing sleeve compression ring 114 ; the sealing sleeve 113 is sleeved on the end of the push rod 107 exposed outside the sealing cover 111 .

During specific implementation, a sealing ring is provided between the charging terminal 101 and the side wall of the first through hole 112, and due to the setting of the sealing ring between the charging terminals 101 and the sealing of the sealing cover 111 and the terminal fixing device 100 connected to each other so that they are insulated from each other. Therefore, by providing the sealing cover 111, the structural stability of the charging gun can be further increased and the service life of the charging gun can be extended.

During specific implementation, by setting the sealing sleeve 113 outside and/or inside the second through hole 103 for the push rod 107 to pass through, and the sealing sleeve compression ring 114 integrated with the sealing sleeve 113, the second through hole 103 can be realized. At this time, if water enters the side where the charging gun is connected to the external electrical equipment (for example, a new energy vehicle), due to the blocking of the sealing sleeve 113, the water will not enter the sealing cover 111 and the power terminal. 104, to avoid casualties and property losses caused by circuit breaks during the charging of new energy vehicles.

In a specific application, the switch structure is installed in the charging gun, and a sealed casing is provided on the outside of the charging gun, and the sealed casing exposes the side of the switch structure connected to the external electrical equipment (that is, the charging terminal 101 is connected to the external electrical equipment). One end connected to the electrical equipment), the overall sealing wraps the terminal fixing device 100 , the transfer terminal 102 , the power terminal 104 and part of the cables connected to the power terminal 104 . At this time, by providing the sealing sleeve 113 and the sealing cover 111 , water or sundries can be prevented from entering into the cavity of the charging gun through the second through hole 103 through which the push rod 107 passes.

During specific implementation, the sealing sleeve 113 can be made of elastic silica gel, and the material of the sealing sleeve 113 is not limited here, as long as the purpose of the present invention is achieved.

A switch structure for a charging gun of the present disclosure, the switch structure further includes a push bracket 118 slidingly connected with the sealing cover 111, the push bracket 118 is used for installing the transfer terminal 102, the The push rod 107 pushes the sealing sleeve 113 to drive the push bracket 118 to translate in the axial direction; the push bracket 118 is correspondingly provided with at least one first fixing part 119, and each of the first fixing parts 119 abuts against the rotating shaft. A side surface of the terminal 109 opposite to the first contact 105 is connected.

During specific implementation, by setting the push bracket 118 and setting the first fixing part 119 on the push bracket 118, a plurality of transfer terminals 102 can be firmly fixed on the push bracket 118, and a push rod 107 can be used to push the push bracket In the process of 118, multiple transfer terminals 102 are driven to produce the same displacement, which simplifies the production process and reduces the volume of the charging gun.

During specific implementation, a sliding limiter 126 can be provided in the axial direction of the push bracket 118, and a sliding groove 127 can be provided to match the axial edge of the sealing cover 111 of the terminal fixing device 100, and the sliding limiter 126 can be positioned on the sliding groove. 127 to prevent the pushing bracket 118 from shifting and ensure the connection between the first contact 105 and the second contact 106 .

During specific implementation, when the reset member 110 is a stretchable elastic member, the reset member 110 can be arranged between the push bracket 118 and the terminal fixing device 100, and the push rod 107 is used to push the push bracket 118 to drive the first contact 105 on the transfer terminal 102 Contacting and connecting with the second contact 106, so as to play the role of electrical connection.

Further, as shown in FIG. 2 , the transfer terminal 102 includes a charging terminal connector 120 and a power terminal connector 121 , the charging terminal connector 120 and the power terminal connector 121 are bent and connected to form an L shape, and the charging terminal The connector 120 is electrically connected to the corresponding charging terminal 101, and the power terminal connector 121 is provided with the first contact 105 on the side facing the power terminal 104, and the first contact 105 is connected to the first contact 105. The two contacts 106 are arranged opposite to each other.

During specific implementation, the shape of the transfer terminal 102 is not particularly limited, as long as the transfer terminal 102 can be fixedly arranged on the push bracket 118 to realize the contact connection between the first contact 105 and the second contact 106, In actual production, the specific shape of the adapter terminal 102 can be set according to actual needs.

Further, the power terminal connector 120 has elasticity, when the first contact 105 is in contact with the second contact 106, the pressure applied to the second contact 106 by the power terminal connector 121 is 5N-95N.

During specific implementation, the flexible setting of the power terminal connector 120 can prevent false connection between the first contact 105 and the second contact 106 , causing harm to the new energy vehicle.

The power terminal connector 120 is applied in a charging gun, and the power terminal connector 120 has elasticity, which can increase the stability of the connection between the first contact 105 and the second contact 106 . Avoid false connection between the first contact 105 and the second contact 106 . According to the experimental results, the inventor set the pressure applied to the second contact 106 by the power terminal connector 121 to be 5N-95N.

In order to test the influence of the pressure applied to the second contact 106 by the power terminal connector 121 on the conductivity, the inventor selected 10 pairs of the same shape, and when the power terminal connector 121 applied different pressures to the second contact 106, tested the first For the conductivity and temperature rise of the contact between the contact 105 and the second contact 106 , in this embodiment, the ideal value is that the conductivity is greater than 99% and the temperature rise is less than 50K. The test results are shown in Table 4.

The conductivity test is to connect the power terminal connector 121 to the second contact 106, and then conduct electricity to detect the conductivity of the contact between the first contact 105 and the second contact 106. In this embodiment, the conductivity is greater than 99%. % is an ideal value.

The temperature rise test is to conduct the same current after the first contact 105 is in contact with the second contact 106, and detect the contact between the first contact 105 and the second contact 106 before energization and after temperature stabilization in a closed environment temperature, and make the difference to take the absolute value. In this embodiment, a temperature rise greater than 50K is considered unqualified.

Table 4, the influence of different pressures applied to the second contact 106 by the power terminal connector 121 on the conductivity and temperature rise

It can be seen from Table 4 that when the pressure is less than 5N, the electrical conductivity greater than 99% and the temperature rise less than 50K cannot be satisfied at the same time, so when the pressure is less than 5N, the experimental values cannot meet the actual needs. When the pressure is greater than or equal to 5N, the conductivity is better, and the temperature rise is less than 50K, but when the pressure is greater than 95N, the conductivity is also excellent. However, when the pressure is greater than 95N, the increase in conductivity is not obvious, the temperature rise tends to be stable, and the processing is difficult. Therefore, the inventor believes that the preferred pressure is 5N-95N. Similarly, it can be seen from Table 4 that the conductive effect is better when the pressure is greater than or equal to 20N, and when the pressure is greater than 86N, the increase in conductivity is not obvious. Therefore, the inventor's further preferred pressure is 20N-86N.

A switch structure for a charging gun in the present disclosure, the switch structure further includes a power terminal fixing device 122, and the power terminal fixing device 122 is provided with at least one second fixing part 123, each of the second fixing parts 123 is used to abut against a side surface of the power terminal 104 opposite to the second contact 106 .

During specific implementation, by setting the power terminal fixing device 122 and the second fixing part 123, the power terminal 104 can be firmly fixed on the power terminal fixing device 122, preventing the power terminal 104 from shifting, and avoiding contact with the first contact 105 and the second contact. A virtual connection occurs between the contacts 106, which prolongs the service life of the charging gun.

Further, as shown in FIG. 2, the power terminal 104 includes a transfer terminal connector 124 and a cable connector 125, the transfer terminal connector 124 and the cable connector 125 are bent and connected into an L shape, and the transfer The terminal connector 124 is provided with a second contact 106 towards the side of the transfer terminal 102, and the second contact 106 is arranged opposite to the first contact 105; the cable connector 125 is arranged on the The channel on the power terminal fixing device 122 is connected to the cable of the charging gun.

During specific implementation, the shape of the power terminal 104 is not particularly limited, as long as the power terminal 104 can be fixedly arranged on the power terminal fixing device 122 to realize the contact connection between the first contact 105 and the second contact 106. Among them, the specific shape of the power terminal 104 can be set according to actual needs.

During specific implementation, when the reset member 110 is a compressed elastic member, the reset member 110 can be arranged between the push bracket 118 and the power terminal fixing device 122, and the push rod 107 is used to push the push bracket 118 to drive the first contact on the transfer terminal 102 105, contacting and connecting with the second contact 106 of the power terminal 104 on the power terminal fixing device 122, so as to play the role of electrical connection.

Further, the transfer terminal connector 124 has elasticity, and when the first contact 105 is in contact with the second contact 106, the transfer terminal connector 124 exerts force on the first contact 105. The pressure is 5N-95N.

During specific implementation, the elastic setting of the transfer terminal connector 124 can prevent false connection between the first contact 105 and the second contact 106 and avoid harm to the new energy vehicle.

In order to test the influence of the pressure applied to the first contact 105 by the transfer terminal connector 124 on the conductivity, the inventor selected 10 pairs of the same shape and the transfer terminal connector 124 to apply different pressures to the first contact 105. For the conductivity and temperature rise of the contact between the first contact 105 and the second contact 106 , in this embodiment, it is an ideal value that the conductivity is greater than 99% and the temperature rise is less than 50K. The test results are shown in Table 5.

The conductivity test is to connect the transfer terminal connector 124 to the first contact 105, then energize, and detect the conductivity at the contact point between the first contact 105 and the second contact 106. In this embodiment, the conductivity is greater than 99% is ideal.

The temperature rise test is to conduct the same current after the first contact 105 and the second contact 106 are in contact, and detect the connection between the first contact 105 and the second contact 106 before energization and after temperature stabilization in a closed environment temperature, and make the difference to take the absolute value. In this embodiment, a temperature rise greater than 50K is considered unqualified.

Table 5, the influence of different pressures applied to the first contact 105 by the transfer terminal connector 124 on the conductivity

It can be seen from Table 5 that when the pressure is less than 5N, the electrical conductivity greater than 99% and the temperature rise less than 50K cannot be satisfied at the same time, so when the pressure is less than 5N, the experimental values cannot meet the actual needs. When the pressure is greater than or equal to 5N, the conductivity is better, and the temperature rise is less than 50K, and when the pressure is greater than 95N, the conductivity is also excellent. However, when the pressure is greater than 95N, the increase in conductivity is not obvious, the temperature rise tends to be stable, and the processing is difficult. Therefore, the inventor believes that the preferred pressure is 5N-95N. Similarly, it can be seen from Table 5 that the conductive effect is better when the pressure is greater than or equal to 20N, and when the pressure is greater than 86N, the increase in conductivity is not obvious. Therefore, the inventor's further preferred pressure is 20N-86N.

Further, as shown in FIG. 2 , the power terminal 104 is also provided with an elastic piece 128 , one end of the elastic piece 128 is connected to the end of the transfer terminal connector 124 , and the other end is against the second fixing portion 123 catch.

During specific implementation, through the setting of the elastic piece 128, when the first contact 105 and the second contact 109 are connected, the mutual force can be increased to avoid disconnection of the first contact 105 and the second contact 106, False connection occurs to avoid property loss due to damage to electrical equipment.

Further, the charging terminal 101 includes a positive terminal and a negative terminal, and the positive terminal and the negative terminal are electrically connected to the corresponding transfer terminal 102 through the telescopic piece.

Further, the charging terminal 101 includes a signal line terminal and a PE line terminal, and the signal line terminal and the PE line terminal are electrically connected to the corresponding transfer terminal 102 through the telescopic member.

During specific implementation, the number of charging terminals 101 is not limited, and according to specific needs, multiple charging terminals can be set.

In a switch structure for a charging gun of the present disclosure, the shortest distance between the first contact 105 and the second contact 106 is less than or equal to the distance that the push rod 107 pushes the transfer terminal 102 to move .

During specific implementation, the distance between the first contact 105 and the second contact 106 can be smaller than the distance that the push rod 107 pushes the transfer terminal 102 to move, which can prevent the first contact 105 from contacting the second The virtual connection between the contacts 106 increases the stability of the connection between the first contact 105 and the second contact 106 .

During specific implementation, the displacement of the push rod 107 to push the transfer terminal 102 to move is 3.6 mm, and the minimum distance between the first contact 105 and the second contact 106 is 2.6 mm. The distance between the contacts 106 is smaller than the distance that the push rod 107 pushes the transfer terminal 102 to move, which can make the interference fit between the first contact 105 and the second contact 106, making the connection between the two closer , to ensure the stability of the electrical connection between the first contact 105 and the second contact 106 .

In a specific implementation, the distance that the push rod 107 pushes the transfer terminal 102 to move is greater than the distance between the first contact 105 and the second contact 106 , which can be offset by the reset member 110 .

For example, the distance between the first contact 105 and the second contact 106 is smaller than the distance that the push rod 107 pushes to move the transfer terminal 102, which can be achieved by connecting the transfer terminal 102 and the power electronics 104 A compression elastic member is disposed therebetween, and the connection between the first contact 105 and the second contact 106 is realized through deformation of the compression elastic member.

For example, the distance between the first contact 105 and the second contact 106 is equal to the distance that the push rod 107 pushes the transfer terminal 102 to move. Tensile elastic members are arranged between to realize the connection between the first contact 105 and the second contact 106. At this time, the distance between the first contact 105 and the second contact 106 can also be It is set to be smaller than the distance that the push rod 107 pushes the transfer terminal 102 to move. At this time, the first contact 105 and connection between the second contacts 106 .

In actual production, as long as the first contact 105 can be brought into contact with the second contact 106 , there is no limitation as to which method is used.

Further, the outer periphery of the switch structure is provided with injection molded parts, and the injection molded parts insulate and seal the terminal fixing device 100, the transfer terminal 102, the power terminal 104 and some cables connected to the power terminal 104, and expose Out of the opening end of the cavity structure.

During specific implementation, by setting the injection molded parts, the charging gun can be fixed, protected and insulated to a certain extent, prolonging the service life of the charging gun, and preventing the charging gun from being damaged due to the gun body, causing harm to the life of the user.

A charging gun, comprising the switch structure for the charging gun described in any one of the above embodiments and a housing, the terminal fixing device, the power terminal fixing device and the cable are fixed in the housing.

A charging device, comprising the charging gun described in any one of the above embodiments, and a charging socket matched with the charging gun, wherein a ejector rod is arranged in the charging socket, when the charging gun is connected to the charging socket During mating, the ejector rod abuts against the push rod 107 and pushes the push rod 107 to translate in the axial direction, thereby driving the first contact 105 to contact the second contact 106 .

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

A switch structure for a charging gun, characterized in that it comprises,

A terminal fixing device, the terminal fixing device is axially provided with at least two cavities;

at least one charging terminal disposed at least partially within the cavity;

At least one transfer terminal, one end of the transfer terminal is electrically connected to the charging terminal, and the other end is provided with a first contact;

At least one power terminal, one end of the power terminal is provided with a second contact, and the other end is electrically connected to the cable of the charging gun;

a push rod, the push rod is at least partially disposed in the cavity and is disposed in the axial direction in the cavity;

The push rod is configured to control the transfer terminal to translate in the axial direction, so that the first contact is in contact with or separated from the second contact.
The switch structure for a charging gun according to claim 1, wherein the contact resistance of the first contact and the second contact is less than 9mΩ.
The switch structure for a charging gun according to claim 1, further comprising a telescopic piece, one end of the telescopic piece is connected to the charging terminal, and the other end is connected to the transfer terminal.
The switch structure for a charging gun according to claim 3, wherein the telescopic member is configured as a stretched spring-shaped conductive wire, and the stretched spring-shaped conductive wire applies a force to the transfer terminal away from the force on the power terminals.
The switch structure for a charging gun according to claim 3, wherein the telescopic member is configured as a relative sliding device, and the relative sliding device includes a fixed part and a sliding part, and the fixed part is arranged on the charging port. The terminal is adjacent to one end of the transfer terminal, the sliding part is disposed at the end of the transfer terminal adjacent to the charging terminal, and the sliding part slides relative to the fixing part and is connected in contact.
The switch structure for a charging gun according to claim 5, characterized in that, the contact resistance of the fixed part after contact with the sliding part is less than 9mΩ.
The switch structure for a charging gun according to claim 1, wherein the switch structure further comprises a reset member, and the reset member is configured to provide the transfer terminal with a force in a direction away from the power terminal , so that the first contact is separated from the second contact.
The switch structure for a charging gun according to claim 7, wherein the elastic coefficient of the reset member is 0.6N/mm to 7.4N/mm.
The switch structure for a charging gun according to claim 7, wherein the reset member is a compressed elastic member, and the compressed elastic member is insulated and connected between the transfer terminal and the power supply terminal.
The switch structure for a charging gun according to claim 7, wherein the reset member is a tensile elastic member, and the tensile elastic member is insulated and fixedly connected between the transfer terminal and the terminal fixing device In between, and/or, the stretching elastic member is configured as a stretching spring-like wire, one end of the stretching spring-like wire is connected to the charging terminal, and the other end is connected to the transfer terminal.
The switch structure for a charging gun according to claim 1, wherein the terminal fixing device is further provided with a sealing cover on the side close to the transfer terminal, and the sealing cover is fixed on the fixed side of the terminal. device, and is sealed and connected with the terminal fixing device; a first through hole is set on the sealing cover corresponding to the charging terminal, and a sealing ring is set in the first through hole, and the sealing ring makes the charging terminal Sealing between the charging terminal and the side wall of the first through hole.
The switch structure for a charging gun according to claim 11, wherein a second through hole is provided on the sealing cover corresponding to the push rod, and the second through hole is also provided with the The second through hole is sealed with a sealing sleeve, and the central part of the sealing sleeve moves in translation following the push rod.
The switch structure for charging gun according to claim 12, characterized in that, the switch structure further comprises a push bracket slidingly connected with the sealing cover, and the push bracket is used for installing the transfer terminal, The push rod pushes the sealing sleeve to drive the push bracket to translate in the axial direction; the push bracket is correspondingly provided with at least one first fixing part, and each of the first fixing parts abuts the adapter terminal and the The side surface opposite to the first contact.
The switch structure for a charging gun according to claim 1, wherein the transfer terminal includes a charging terminal connector and a power terminal connector, and the charging terminal connector and the power terminal connector are bent and connected to form L type, the charging terminal connector is electrically connected to the corresponding charging terminal, the power terminal connector is provided with the first contact on the side facing the power terminal, the first contact is connected to the The second contacts are arranged oppositely.
The switch structure for a charging gun according to claim 14, wherein the power terminal connector has elasticity, and when the first contact contacts the second contact, the power terminal connector The pressure applied to the second contact is 5N-95N.
The switch structure for a charging gun according to claim 1, wherein the switch structure further comprises a power terminal fixing device, and the power terminal fixing device is provided with at least one second fixing part, each of the first The two fixing parts abut against a surface of the power terminal opposite to the second contact.
The switch structure for a charging gun according to claim 16, wherein the power terminal includes a transfer terminal connector and a cable connector, and the transfer terminal connector and the cable connector are bent and connected In an L shape, the transfer terminal connector is provided with the second contact facing the transfer terminal side, and the second contact is arranged opposite to the first contact; the cable connector It is connected with the cable of the charging gun through the channel provided on the power terminal fixing device.
The switch structure for a charging gun according to claim 17, wherein the transfer terminal connector has elasticity, and when the first contact contacts the second contact, the transfer terminal The pressure applied by the connecting piece to the first contact is 5N-95N.
The switch structure for a charging gun according to claim 17, wherein the power terminal is also provided with an elastic sheet, one end of the elastic sheet is connected to the end of the transfer terminal connector, and the other end is connected to the end of the transfer terminal connector. The second fixing part abuts against.
The switch structure for a charging gun according to claim 3, wherein the charging terminal includes a positive terminal and a negative terminal, and the positive terminal and the negative terminal are connected to the corresponding transfer terminal through the The telescoping member is electrically connected.
The switch structure for a charging gun according to claim 3, wherein the charging terminal includes a signal line terminal and a PE line terminal; the signal line terminal and the PE line terminal communicate with the corresponding transfer terminal The telescopic elements are electrically connected.
The switch structure for a charging gun according to any one of claims 1-21, wherein the shortest distance between the first contact and the second contact is less than or equal to the distance pushed by the push rod The distance that the transfer terminal moves.
A charging gun, characterized in that it comprises the switch structure and the housing for the charging gun according to any one of claims 1-21, the terminal fixing device, the power terminal fixing device and the cable are fixed on inside the housing.
A charging device, characterized in that it comprises the charging gun according to claim 23, and a charging socket matched with the charging gun, and a ejector rod is arranged in the charging socket, when the charging gun is connected to the charging When the sockets are mated, the ejector rod abuts against the push rod and pushes the push rod to translate in the axial direction, thereby driving the first contact to contact the second contact.