A relay with sampling function

Abstract

The utility model relates to new energy automobile electric control technical field discloses a kind of relays with sampling function, including shell and the static contact point of being set to the outside of shell, the inside of shell is extended with mounting contact point to static contact point, integrally setting on mounting contact point is the sampling contact point for obtaining sampling signal on static contact point, sampling contact point is electrically connected with the sampling harness for transmitting sampling signal, sampling harness extends to the outside of shell, a kind of relay with sampling function of the utility model, by setting sampling terminal and sampling harness in the shell inside of relay, the redundant harness of relay outside can be effectively reduced, to simplify the harness arrangement in BDU, to improve the heat dissipation performance of relay. By integrally setting sampling contact point on mounting contact point, both the connection stability of sampling contact point and static contact point can be improved, and sampling accuracy can be improved, while avoiding the sampling error caused by unreliable installation.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle electronic control technology, and in particular to a relay with sampling function. Background Technology

[0002] A BDU (Battery Disconnect Unit) is a battery pack circuit breaker unit specifically designed for the inside of a battery pack and is also a type of distribution box. It is an essential component in new energy vehicles, and its internal components mainly include relays and fuses. A relay is a common electrical control component that uses electromagnetic principles to control circuit switching. By controlling the positive and negative input voltages, the relay load is controlled to engage and disengage, ultimately achieving the connection and disconnection of the circuit. Relays, as a major component of the BDU, account for a significant portion of its cost. Figure 1 As shown, this is a schematic diagram of the structure and series installation of a relay in the prior art. It mainly includes a housing 1, with two stationary contacts 2 on the upper surface of the housing 1 for connecting external circuits in series. During series installation, the copper busbars 26 on both sides of the external circuit connection port are fixed to the two stationary contacts 2 using bolts 11. In operation, by sending a signal to the relay's signal receiving end (not shown), the electromagnetic mechanism (not shown) inside the relay can be controlled to connect or disconnect the two stationary contacts 2, thereby completing the switching on and off of the external circuit.

[0003] As the most important switching unit in the BDU, the temperature and voltage signals at both ends of the relay are of great significance to the safety of the entire vehicle. The commonly used method is to use bolt 11 to press an additional temperature / voltage sampling terminal onto the copper busbar 26 to indirectly obtain the temperature and voltage signals on the relay stationary contact 2, and then transmit the obtained signals to the control center through the sampling harness 5 on the sampling terminal, thereby realizing the safety monitoring of the relay.

[0004] However, the sampling method described above, where both the sampling terminals and sampling harness 5 are externally located on the relay, results in redundancy in the internal wiring harness of the BDU, which is detrimental to wiring and also affects heat dissipation. Furthermore, the bolt connection method (11) is prone to sampling errors due to unreliable installation, and therefore requires further improvement. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a relay with sampling function. By incorporating a built-in sampling terminal and sampling harness, it simplifies harness layout and improves sampling accuracy.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0007] A relay with sampling function includes a housing and a stationary contact disposed on the outside of the housing. A mounting contact extends from the stationary contact to the inside of the housing. A sampling contact for acquiring a sampling signal on the stationary contact is integrally disposed on the mounting contact. A sampling wire harness for transmitting the sampling signal is electrically connected to the sampling contact and extends to the outside of the housing.

[0008] By adopting the above solution and placing the sampling terminals and sampling harness inside the relay housing, redundant wiring harnesses on the outside of the relay can be effectively reduced, simplifying the wiring arrangement inside the BDU and thus improving the relay's heat dissipation performance. Integrating the sampling contacts into the mounting contacts improves the connection stability between the sampling contacts and the stationary contacts, enhances sampling accuracy, and avoids sampling errors caused by unreliable installation. Transmitting the sampling signal to the outside of the relay via the sampling harness facilitates the reception of the sampling signal by external devices.

[0009] Preferably, the outer side of the housing is provided with a signal connection port for connecting external devices to output sampling signals, and the signal end of the sampling harness is electrically connected to the signal input terminal of the signal connection port.

[0010] By adopting the above solution, the signal connection port can facilitate the connection of external devices to the sampling harness and improve the stability of signal reception.

[0011] Preferably, the outer side of the housing is provided with a connector for mounting the signal connection port.

[0012] By adopting the above solution, the connector can facilitate the installation of signal connection ports and further improve the connection stability between the sampling harness and external devices.

[0013] Preferably, the upper surface of the connector has a mounting groove, and the signal connection port is fixedly installed in the mounting groove.

[0014] The above solution allows external devices to connect to the signal connection port from the top of the connector, thereby improving connection efficiency and convenience.

[0015] Preferably, the upper surface of the stationary contact is provided with a threaded hole, and a bolt is screwed into the threaded hole.

[0016] The above solution allows the bolts to securely mount the copper busbars of the external wiring to the stationary contacts.

[0017] Preferably, the housing is provided with a heat dissipation base, which includes a heat dissipation base plate that is attached to the bottom of the housing for heat exchange with the housing, a plurality of heat dissipation fins disposed on the heat dissipation base plate, and an installation mechanism for fixing the housing to the heat dissipation base plate.

[0018] Using the above solution, the heat dissipation plate on the heat sink base can quickly dissipate heat from the housing, thereby improving the heat dissipation performance of the relay. The heat dissipation fins increase the surface area of ​​the heat dissipation plate, further enhancing the heat dissipation performance of the heat sink base. The mounting mechanism can combine the relay housing with the heat sink base, ensuring a stable connection.

[0019] Preferably, a heat dissipation pad is provided between the bottom of the housing and the heat dissipation base plate.

[0020] By adopting the above solution, the heat dissipation pad can eliminate the gap between the bottom of the housing and the heat dissipation base plate, so that the heat transfer between the two is more direct, thereby effectively improving the heat dissipation performance of the heat dissipation base plate and the entire heat dissipation base.

[0021] Preferably, the installation mechanism includes clamping plates on both sides of the housing, a first positioning tooth disposed on the opposite surface of the two clamping plates, and a second positioning tooth disposed on both sides of the housing and elastically engaged with the first positioning tooth. The first positioning tooth and the second positioning tooth are both distributed along a plane perpendicular to the heat dissipation pad.

[0022] The above-described design allows the relay housing to be directly mounted between the two clamping plates along a plane perpendicular to the heat dissipation pad. This facilitates the clamping of the heat dissipation pad, minimizing the gap between the pad, the housing, and the heat dissipation base, thereby further improving the heat transfer efficiency of the base. The snap-fit ​​engagement between the first and second positioning teeth increases the contact area between the relay housing and the clamping plates, enhancing heat exchange efficiency, and also locks the relay housing in a suitable position according to the thickness of the heat dissipation pad. This effectively improves the installation efficiency and convenience between the relay housing and the heat dissipation base.

[0023] Preferably, a guide rod is provided on the outer side of the housing along a direction perpendicular to the plane of the heat dissipation pad, and a guide groove is provided on the surface of the clamping plate for the guide rod to slide and connect.

[0024] By adopting the above solution, the sliding fit between the guide rod and the guide groove can not only play a guiding role, making the splicing of the relay housing and the heat sink base more precise and smooth, but also play a lateral limiting role, preventing the relay housing from separating from the two clamping plates along the plane of the heat sink pad, and further improving the connection stability between the heat sink base and the relay housing.

[0025] Preferably, the heat sink base is provided with feet on both sides for fixing the heat sink base.

[0026] By adopting the above solution, the heat sink and relay can be stably installed in a specific position, further improving the stability of the BDU system.

[0027] This invention, by employing the above technical solutions, achieves significant technical advantages: By placing the sampling terminals and sampling harness inside the relay housing, redundant wiring harnesses outside the relay are effectively reduced, simplifying the wiring arrangement inside the BDU and thus improving the relay's heat dissipation performance. By integrating the sampling contacts onto the mounting contacts, the connection stability between the sampling contacts and the stationary contacts is improved, as is the sampling accuracy, while avoiding sampling errors caused by unreliable installation. Transmitting the sampling signal to the outside of the relay via the sampling harness facilitates the reception of the sampling signal by external devices. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure and series installation of a relay in the prior art;

[0029] Figure 2 This is a schematic diagram of the structure of this embodiment. Figure 1 ;

[0030] Figure 3 for Figure 2 An enlarged schematic diagram of part A shown;

[0031] Figure 4 This is a schematic diagram of the structure of this embodiment. Figure 2 ;

[0032] Figure 5 for Figure 4 An enlarged schematic diagram of part B is shown below;

[0033] Figure 6 This is a schematic diagram of the structure of this embodiment. Figure 3 ;

[0034] Figure 7 This is a schematic diagram of the structure of this embodiment. Figure 4 ;

[0035] Figure 8 for Figure 7 An enlarged schematic diagram of section C is shown;

[0036] Figure 9 for Figure 7 An enlarged schematic diagram of part D is shown.

[0037] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Housing; 2. Stationary contact; 3. Mounting contact; 4. Sampling contact; 5. Sampling harness; 6. Signal connection port; 8. Connector; 9. Mounting slot; 10. Threaded hole; 11. Bolt; 12. Heat sink base; 13. Heat sink base plate; 14. Heat sink fins; 15. Heat sink pad; 16. Clamping plate; 17. First positioning tooth; 18. Second positioning tooth; 19. Guide rod; 20. Guide groove; 21. Support leg; 22. Through hole; 23. Connecting plate; 24. Mounting plate; 25. Mounting hole; 26. Copper busbar. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0039] like Figures 2 to 9 As shown in the figure, this embodiment discloses a relay with sampling function, including a housing 1 and two stationary contacts 2 fixed to the upper surface of the housing 1 by a hot-melt process. The stationary contacts 2 extend into the housing 1 to form mounting contacts 3. Sampling contacts 4 for acquiring sampling signals from the stationary contacts 2 are welded onto the mounting contacts 3. Sampling wire harnesses 5 for transmitting sampling signals are welded onto the sampling contacts 4, extending to the outside of the housing 1. The sampling signals that the sampling contacts 4 can acquire include, but are not limited to, temperature signals, voltage signals, etc.

[0040] To enable the relays to be installed in series, a threaded hole 10 is provided on the upper surface of the stationary contact 2, and a bolt 11 is screwed into the threaded hole 10.

[0041] To output the sampling signal, a signal connection port 6 is provided on the outer side of the housing 1 for connecting external devices to output the sampling signal. The signal end of the sampling harness 5 is soldered to the signal input terminal of the signal connection port 6. Specifically, a through hole 22 is provided on the side wall of the housing 1 for the sampling harness 5 to pass through. A connector 8 is integrally provided on the outer side of the housing 1. The upper surface of the connector 8 has a mounting groove 9 communicating with the through hole 22. The signal connection port 6 is fixed in the mounting groove 9 with glue and faces upward, thereby facilitating the connection of external devices. The external devices include, but are not limited to, controllers, slave computers, and computers.

[0042] To improve the heat dissipation performance of the relay, a heat dissipation base 12 is provided on the housing 1. The heat dissipation base 12 is made of aluminum alloy, thus having good thermal conductivity and robustness. Specifically, the heat dissipation base 12 includes a heat dissipation base plate 13 that is tightly attached to the bottom of the housing 1 for heat exchange with the housing 1, a plurality of heat dissipation fins 14 integrally formed on the heat dissipation base plate 13, and a mounting mechanism for fixing the housing 1 to the heat dissipation base plate 13. Among them, there are two sets of heat dissipation fins 14, which are respectively arranged on the upper and lower sides of the heat dissipation base plate 13. Each set of heat dissipation fins 14 has multiple fins arranged along the length of the heat dissipation base plate 13, and each heat dissipation fin 14 is perpendicular to the surface of the heat dissipation base plate 13.

[0043] To improve the heat exchange efficiency between the relay housing 1 and the heat dissipation base plate 13, a heat dissipation pad 15 is provided between the bottom of the housing 1 and the heat dissipation base plate 13. The heat dissipation pad 15 is preferably a thermally conductive silicone sheet. The mounting mechanism includes two clamping plates 16 respectively clamped on both sides of the housing 1, a plurality of first positioning teeth 17 disposed on the opposite surfaces of the two clamping plates 16, and a plurality of second positioning teeth 18 disposed on both sides of the housing 1 and elastically engaged with the first positioning teeth 17. The plurality of first positioning teeth 17 and the plurality of second positioning teeth 18 are distributed along a plane perpendicular to the heat dissipation pad 15. Among them, the second positioning teeth 18 are made of plastic and integrally formed with the housing 1, thus having strong elastic deformation capability and robustness, thereby achieving elastic engagement with the first positioning teeth 17.

[0044] In order to improve the splicing accuracy and stability of the relay housing 1 and the heat sink base 12, a guide rod 19 is fixed on the outer side of the housing 1 where the second positioning tooth 18 is installed, along the direction perpendicular to the plane of the heat sink 15. The plate surface of the clamping plate 16 is provided with a guide groove 20 for the guide rod 19 to slide and connect.

[0045] To improve the installation stability of the heat sink base 12, support legs 21 are provided on both sides of the heat sink base 12. The support legs 21 include a connecting plate 23 vertically fixed to the bottom of the heat sink base plate 13 and a mounting plate 24 vertically fixed to the end of the connecting plate 23. The mounting plate 24 has mounting holes 25.

[0046] The specific operating principle is as follows:

[0047] When installing the heat sink base 12, first install the heat sink 15 between the two clamping plates 16 and attach it to the upper surface of the heat sink base plate 13. Then, align the guide rods 19 on both sides of the relay housing 1 with the guide grooves 20 on the two clamping plates 16 respectively, and press the relay housing 1 and the heat sink base 12 together. During the pressing process, the relay housing 1 can press the heat sink 15 along the guide rods 19. Since the tooth surfaces of the first positioning tooth 17 and the second positioning tooth 18 are both inclined outward, the first positioning tooth 17 can bounce on the second positioning tooth 18 during the pressing process of the relay housing 1 and the heat sink base 12. After the heat sink 15 is pressed firmly by the relay housing 1, release the housing 1 and the heat sink base 12, and the housing 1 can be locked in the current position through the snap-fit ​​engagement of the first positioning tooth 17 and the second positioning tooth 18, thereby completing the installation of the heat sink base 12.

[0048] Then, pass the screws (not shown) through the mounting holes 25 and tighten them to install the support 21, the heat sink base 12, and the relay in the designated position. After the heat sink base 12 is installed, fix the copper busbars 26 on both sides of the external circuit serial port to the upper surface of the stationary contact 2 with bolts 11 to complete the series installation of the relay.

[0049] When the relay is running, the sampling contact 4, which is integrated on the mounting contact 3, can sample the temperature / voltage of the relay's load point (i.e., stationary contact 2) and transmit the sampling signal to the signal connection port 6 on the outside of the relay housing 1 through the sampling harness 5. The signal connection port 6 can transmit the acquired sampling signal to an external device (not shown) to complete the relay's status monitoring, thereby improving the safety of the relay's use.

[0050] Since both the sampling contact 4 and the sampling harness 5 are built into the relay housing 1, the external wiring layout of the relay can be simplified, thereby improving heat dissipation performance. At the same time, the integrated design of the sampling contact 4 and the mounting contact 3 can improve sampling accuracy and avoid sampling errors caused by unreliable installation of the sampling contact 4.

[0051] At the same time, the heat sink 12 can exchange heat with the relay housing 1, thereby effectively improving the heat dissipation performance of the relay.

Claims

1. A relay with sampling function, comprising a housing (1) and stationary contacts (2) disposed on the outside of the housing (1), characterized in that: The stationary contact (2) extends into the inner side of the housing (1) to form a mounting contact (3). The mounting contact (3) is integrally provided with a sampling contact (4) for acquiring the sampling signal on the stationary contact (2). The sampling contact (4) is electrically connected to a sampling harness (5) for transmitting the sampling signal. The sampling harness (5) extends to the outer side of the housing (1).

2. A relay with sampling function according to claim 1, characterized in that: The outer side of the housing (1) is provided with a signal connection port (6) for external devices to connect and output sampling signals. The signal end of the sampling harness (5) is electrically connected to the signal input end of the signal connection port (6).

3. A relay with sampling function according to claim 2, characterized in that: The outer side of the housing (1) is provided with a connector (8) for mounting the signal connection port (6).

4. A relay with sampling function according to claim 3, characterized in that: The upper surface of the connector (8) is provided with a mounting groove (9), and the signal connection port (6) is fixedly installed in the mounting groove (9).

5. A relay with sampling function according to claim 1, characterized in that: The upper surface of the stationary contact (2) is provided with a threaded hole (10), and a bolt (11) is screwed into the threaded hole (10).

6. A relay with sampling function according to any one of claims 1 to 5, characterized in that: The housing (1) is provided with a heat dissipation base (12), which includes a heat dissipation base plate (13) attached to the bottom of the housing (1) for heat exchange with the housing (1), a plurality of heat dissipation fins (14) provided on the heat dissipation base plate (13), and an installation mechanism for fixing the housing (1) to the heat dissipation base plate (13).

7. A relay with sampling function according to claim 6, characterized in that: A heat dissipation pad (15) is provided between the bottom of the housing (1) and the heat dissipation base plate (13).

8. A relay with sampling function according to claim 7, characterized in that: The mounting mechanism includes clamping plates (16) clamped on both sides of the housing (1), first positioning teeth (17) disposed on the opposite sides of the two clamping plates (16), and second positioning teeth (18) disposed on both sides of the housing (1) and elastically engaged with the first positioning teeth (17). The first positioning teeth (17) and the second positioning teeth (18) are both distributed along the plane direction perpendicular to the heat dissipation pad (15).

9. A relay with sampling function according to claim 8, characterized in that: A guide rod (19) is provided on the outer side of the housing (1) in a direction perpendicular to the plane of the heat dissipation pad (15), and a guide groove (20) is provided on the surface of the clamping plate (16) for the guide rod (19) to slide and connect.

10. A relay with sampling function according to claim 6, characterized in that: Both sides of the heat dissipation base (12) are provided with support feet (21) for fixing the heat dissipation base (12).

Images