A relay and battery pack

Abstract

The utility model provides a kind of relay and battery pack, the relay includes shell, contact and contact detection device;The contact is arranged on the shell, the shell has outer surface and is equipped with accommodating groove on the outer surface, the contact is located at the opening of the accommodating groove one end, the contact detection device is embedded in the accommodating groove and is connected with the contact. One end of contact detection device is connected with contact, the other end is connected to the circuit board of battery pack circuit breaker unit, real-time monitoring of contact temperature and adhesion anomaly. Contact detection device is directly built-in in accommodating groove, without additional preparation of separate wiring harness terminal and plug, easy to install, reduces installation process;Wiring harness connection is mainly completed in the accommodating groove on the surface of shell, saves wiring space, the whole contact detection device occupies small space, is conducive to the miniaturization of relay and battery pack circuit breaker unit.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a relay and a battery pack. Background Technology

[0002] Relays are a critical electrical component within battery packs, responsible for switching the power supply on and off and providing safety protection. Relays can fail under high temperatures and abnormally high current conditions, leading to power supply disruptions. Therefore, temperature and adhesion monitoring are necessary at the core contact points of the relay to determine its proper functioning.

[0003] Conventional monitoring methods involve fixing wire harness terminals above the relay contacts and connecting the terminals to the power busbar to monitor contact temperature and adhesion. This method requires bolts to secure the additional wire harness terminals and power busbar together to the bolt holes of the contacts, taking up extra space. The use of plugs for connection is cumbersome, and there's a risk of bolts loosening, resulting in wasted time and unreliability. Utility Model Content

[0004] This invention provides a relay and battery pack, aiming to solve the problems of complex installation and unreliability of the contact detection device of the relay in the prior art.

[0005] In a first aspect, this utility model provides a relay, which includes a housing, contacts, and a contact detection device; the contacts are disposed on the housing, the housing has an outer surface and a receiving groove is provided on the outer surface, the contacts are disposed at one end of the receiving groove, and the contact detection device is embedded in the receiving groove and connected to the contacts.

[0006] Optionally, the contact detection device includes a temperature detection mechanism and an adhesion detection mechanism disposed within the receiving groove; the adhesion detection mechanism is at least partially disposed on the bottom wall of the receiving groove and located between the temperature detection mechanism and the bottom wall of the receiving groove; the adhesion detection mechanism is connected to the contact, and the temperature detection mechanism is connected to the end of the adhesion detection mechanism near the contact, with a gap between the temperature detection mechanism and the contact.

[0007] Optionally, the temperature detection mechanism includes a temperature sensor, and the adhesion detection mechanism includes a heat-conducting sheet;

[0008] The heat-conducting sheet is connected to the contact point; the temperature sensor is disposed on the heat-conducting sheet and has a gap between it and the contact point.

[0009] Optionally, the temperature detection mechanism further includes a first connecting line and a first external connecting piece, one end of the first connecting line being connected to the temperature sensor, and the other end of the first connecting line being connected to the first external connecting piece;

[0010] The adhesion detection mechanism further includes a second connecting line and a second external connecting piece. One end of the second connecting line is connected to the contact point, and the other end is connected to the second external connecting piece. The heat-conducting sheet is disposed at the end of the second connecting line near the contact point and is connected to the contact point.

[0011] Optionally, the adhesion detection mechanism further includes a contact piece disposed between the heat-conducting sheet and the contact point.

[0012] Optionally, there are two first connecting lines and two first external connecting pieces, with one first connecting line connected to one first external connecting piece.

[0013] Optionally, the relay has a first direction, the outer surface includes a first surface, a second surface disposed opposite to each other along the first direction, and a side surface connected between the first surface and the second surface, the contact is disposed on the first surface, and the receiving groove extends from the first surface through the side surface to the second surface.

[0014] Optionally, the receiving groove includes: a contact segment, a connecting line segment, and an external connection segment; wherein,

[0015] The contact segment is located on the first surface. One end of the contact segment is provided with the contact point, and the other end is connected to the connecting line segment. The contact piece, the heat-conducting piece, and the temperature sensor are disposed on the contact segment. The heat-conducting piece and the temperature sensor are stacked along the first direction.

[0016] One end of the connecting line segment is located on the first surface and communicates with the contact segment, and the other end extends through the side to the second surface and communicates with the external connection segment. The first connecting line and the second connecting line are embedded side by side in the connecting line segment.

[0017] The external connection segment is located on the second surface, and the first external connection piece and the second external connection piece are embedded in the external connection segment.

[0018] Optionally, the contact segment includes a first sub-contact segment and a second sub-contact segment connected together;

[0019] One end of the first sub-contact segment is provided with the contact point, and the other end is connected to the second sub-contact segment. The contact piece is disposed on the first sub-contact segment.

[0020] One end of the second sub-contact segment is connected to the first sub-contact segment, and the other end is connected to the connecting line segment. The heat-conducting sheet and the temperature sensor are disposed in the second sub-contact segment, and the heat-conducting sheet and the temperature sensor are stacked along the first direction.

[0021] Optionally, it also has a second direction perpendicular to the first direction;

[0022] Along the second direction, two first connecting lines are spaced apart and the second connecting line is located between the two first connecting lines;

[0023] Along the second direction, two first external connecting pieces are spaced apart and the second external connecting piece is located between the two first external connecting pieces.

[0024] Secondly, embodiments of the present invention also provide a battery pack, including any of the relays provided in the first aspect.

[0025] This invention provides a relay and a battery pack. The relay includes a housing, contacts, and a contact detection device. The housing has a recessed groove for accommodating the contact detection device, which is integrated into the recessed groove as an integral part of the relay. One end of the contact detection device connects to the contacts, and the other end connects to the circuit board of the battery pack's circuit breaker unit, enabling real-time monitoring of contact temperature and adhesion abnormalities. The contact detection device is directly integrated into the recessed groove, eliminating the need for separate wiring harness terminals and plugs, simplifying installation and reducing installation steps. Wiring connections are primarily completed within the recessed groove on the housing surface, saving wiring space. The overall small footprint of the contact detection device contributes to the miniaturization of the relay and battery pack's circuit breaker unit.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is an exploded view of a relay according to an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of a relay according to an embodiment of the present utility model;

[0030] Figure 3 This is a schematic diagram of a relay according to an embodiment of the present invention in another direction;

[0031] Figure 4 yes Figure 3 A partially enlarged view of the relay shown;

[0032] Figure 5 This is a schematic diagram of the temperature detection mechanism 31 according to an embodiment of the present utility model;

[0033] Figure 6 This is a schematic diagram of the adhesion detection mechanism 32 according to an embodiment of the present utility model.

[0034] Reference numerals: 1: Housing; 11: Outer surface; 111: First surface; 112: Side surface; 113: Second surface; 12: Receiving groove; 121: Contact segment; 1211: First sub-contact segment; 1212: Second sub-contact segment; 122: Connecting line segment; 123: External connecting segment; 2: Contact; 3: Contact detection device; 31: Temperature detection mechanism; 311: Temperature sensor; 312: First connecting line; 313: First external connecting piece; 32: Adhesion detection mechanism; 321: Contact piece; 322: Heat-conducting piece; 323: Second connecting line; 324: Second external connecting piece. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the fixed scope of the present utility model.

[0036] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0037] This utility model provides a relay, which includes a housing 1, a contact 2, and a contact detection device 3. The contact 2 is disposed on the housing 1, the housing 1 has an outer surface 11 and a receiving groove 12 is provided on the outer surface 11, the contact 2 is disposed at one end of the receiving groove 12, and the contact detection device 3 is embedded in the receiving groove 12 and connected to the contact 2.

[0038] like Figure 1 - Figure 3As shown, the relay has a contact 2, which is the most critical component of the relay, responsible for connecting, disconnecting, or switching the current in the circuit. It typically has two states: open and closed. The outer surface 11 of the relay housing 1 has a recessed receiving groove 12. The contact 2 is located at one end of the receiving groove 12. The contact detection device 3 is embedded in the receiving groove 12. One end of the contact detection device 3 is connected to the contact 2, and the other end is connected to an external detection circuit. The relay and its detection circuit are usually located in the Battery Disconnect Unit (BDU). The detection circuit exports information such as the open / closed state and temperature of the contact 2 for real-time monitoring.

[0039] Furthermore, the shape and depth of the receiving groove 12 match the shape and size of the contact detection device 3 to ensure that the contact detection device 3 can be securely embedded in the receiving groove 12, and that the contact detection device 3, except for the part connected to the external detection circuit, is located within the receiving groove 12 and does not protrude from the outer surface 11, thus not occupying additional space in the battery pack. In this embodiment, the contact detection device 3 utilizes the space of the relay itself for installation, occupying little space and contributing to the miniaturization of the relay and BDU.

[0040] The contact detection device 3 has temperature detection and adhesion detection functions, and is connected to two separate detection circuits for temperature detection and adhesion detection, respectively. The contact detection device 3 collects the temperature of contact 2 in real time and transmits the temperature information to the temperature detection circuit. When the temperature of contact 2 is too high, the temperature detection circuit will issue a warning signal to take timely measures to prevent contact 2 from being damaged due to overheating. In addition, the contact detection device 3 can also detect whether contact 2 has adhered. During long-term use, contact 2 may adhere due to arcing, oxidation, etc., causing the circuit to fail to disconnect normally. The contact detection device 3 is connected to an external adhesion detection circuit. When contact 2 is normally conducting and disconnecting, the voltage and current detected in the adhesion detection circuit are different. The current on / off status of contact 2 can be determined based on the detected voltage difference, thereby judging whether contact 2 can normally connect and disconnect. If, after the relay coil is de-energized, the adhesion detection circuit still has a voltage close to the power supply, then contact 2 may have adhered.

[0041] In some alternative embodiments, the contact detection device 3 includes a temperature detection mechanism 31 and an adhesion detection mechanism 32 disposed within the receiving groove 12; the adhesion detection mechanism 32 is at least partially disposed on the bottom wall of the receiving groove 12 and is located between the temperature detection mechanism 31 and the bottom wall of the receiving groove 12; the adhesion detection mechanism 32 is connected to the contact 2, and the temperature detection mechanism 31 is connected to the end of the adhesion detection mechanism 32 near the contact 2, and there is a gap between the temperature detection mechanism 31 and the contact 2.

[0042] In this embodiment, the contact detection device 3 is divided into a temperature detection mechanism 31 for collecting temperature information of the contact 2 and an adhesion detection mechanism 32 for judging the adhesion of the contact 2. The adhesion detection mechanism 32 and the temperature detection mechanism 31 can share the same receiving slot 12. The adhesion detection mechanism 32 and the temperature detection mechanism 31 partially overlap, making the wiring of the contact detection device 3 on the relay surface simpler. The adhesion detection mechanism 32 and the temperature detection mechanism 31 can be connected to the external detection circuit on the same circuit board at adjacent positions, which is convenient for wiring.

[0043] In practical applications, the adhesion detection mechanism 32 is directly connected to the contact 2, while the temperature detection mechanism 31 is indirectly connected to the contact 2 through the adhesion detection mechanism 32. The adhesion detection mechanism 32 is disposed on the bottom wall of the receiving groove 12, and the temperature detection mechanism 31 is stacked on top of the adhesion detection mechanism 32. The adhesion detection mechanism 32 connects to the contact 2, thus connecting the contact 2 to the adhesion detection circuit, enabling monitoring of whether the contact 2 can close and open normally. The temperature detection mechanism 31 only needs to collect the temperature at the contact 2 and does not need to connect the contact 2 to the temperature detection circuit. Therefore, the adhesion detection mechanism 32 and the temperature detection mechanism 31 can be stacked at the end closest to the contact 2, and the temperature detection mechanism 31 is stacked on top of the adhesion detection mechanism 32, with the adhesion detection mechanism 32 transferring the temperature of the contact 2 to the temperature detection mechanism 31.

[0044] As can be seen, the adhesion detection mechanism 32 in this embodiment has the functions of detecting the adhesion of the contact 2 and transferring heat to the temperature detection mechanism 31, so as to realize the adhesion detection and temperature detection functions while stacking the adhesion detection mechanism 32 and the temperature detection mechanism 31.

[0045] In some alternative embodiments, the temperature detection mechanism 31 includes a temperature sensor 311, and the adhesion detection mechanism 32 includes a heat-conducting sheet 322; the heat-conducting sheet 322 is connected to the contact 2; the temperature sensor 311 is disposed on the heat-conducting sheet 322 and has a gap between it and the contact 2.

[0046] Figure 5 and Figure 6The specific structures of the temperature detection mechanism 31 and the adhesion detection mechanism 32 are shown. The temperature of the contact 2 is transferred to the temperature detection mechanism 31 by a heat-conducting sheet 322 disposed in the adhesion detection mechanism 32. A temperature sensor 311 is disposed at one end of the temperature detection mechanism 31 near the contact 2, and the heat-conducting sheet 322 is disposed at one end of the contact detection device 31 near the contact 2. The temperature sensor 311 is connected to the heat-conducting sheet 322. The heat-conducting sheet 322 is a metal sheet with good thermal conductivity. The temperature sensor 311 uses a negative temperature coefficient (NTC) thermistor. The resistance of the NTC changes with temperature. The real-time resistance of the NTC is obtained by detecting the current and voltage in the detection circuit, and then the corresponding temperature is calculated.

[0047] The heat-conducting plate 322 not only transfers heat but also provides a mounting surface for the NTC. Compared to the contact 2 with its curved appearance, the planar structure of the heat-conducting plate 322 provides better fixation for the NTC. The NTC can also be directly built into the heat-conducting plate 322. When the contact detection device 3 is connected to the relay, the temperature detection mechanism 31 and the adhesion detection mechanism 32 are simultaneously embedded in the receiving groove 12 and connected to the contact 2.

[0048] In addition, in some optional embodiments, the temperature detection mechanism 31 further includes a first connecting line 312 and a first external connecting piece 313. One end of the first connecting line 312 is connected to the temperature sensor 311, and the other end of the first connecting line 312 is connected to the first external connecting piece 313. The adhesion detection mechanism 32 further includes a second connecting line 323 and a second external connecting piece 324. One end of the second connecting line 323 is connected to the contact 2, and the other end is connected to the second external connecting piece 324. The heat-conducting sheet 322 is disposed at the end of the second connecting line 323 near the contact 2 and is connected to the contact 2.

[0049] like Figure 5 - Figure 6 As shown, the temperature detection mechanism 31 is composed of a temperature sensor 311, a first connecting line 312 and a first external connecting piece 313 connected in sequence, and the adhesion detection mechanism 32 is composed of a contact piece 321, a heat-conducting piece 322, a second connecting line 323 and a second external connecting piece 324 connected in sequence.

[0050] The first external connecting piece 313 and the second external connecting piece 324 are used to connect to an external detection circuit to achieve signal transmission. In actual operation, a connection point with a large operating space and easy soldering can be selected according to the actual installation of the relay in the battery pack. The first connecting wire 312 and the second connecting wire 323 are led out to the connection point, and the first external connecting piece 313 and the second external connecting piece 324 at the ends of the first connecting wire 312 and the second connecting wire 323 are soldered to the circuit board of the BDU.

[0051] In this embodiment, when the contact detection device 3 is connected to the BDU, only the first external connecting piece 313 and the second external connecting piece 324 need to be soldered onto the circuit board of the BDU. Compared with the connection method in the prior art that requires multiple plugs, the use of plugs is avoided, a large amount of materials are saved, and the installation process is greatly simplified.

[0052] In some alternative embodiments, the adhesion detection mechanism 32 further includes a contact piece 321 disposed between the heat-conducting sheet 322 and the contact 2.

[0053] Contact piece 321 is soldered onto contact 2, acquiring the on / off signal of contact 2 while simultaneously conducting heat, transferring heat from relay contact 2 to heat-conducting plate 322. Heat-conducting plate 322 is connected to temperature sensor 311, enabling temperature sensor 311 to detect the temperature of relay contact 2 and transmit the temperature signal to first external connecting piece 313 via first connecting line 312. First external connecting piece 313 is connected to external metal terminals. Meanwhile, contact piece 321 itself is connected to relay contact 2, enabling real-time acquisition of the on / off signal of relay contact 2, and is connected to second external connecting piece 324 via second connecting line 323. Second external connecting piece 324 is connected to external metal terminals.

[0054] In some alternative embodiments, the number of receiving slots 12 can be two or more, with the temperature detection mechanism 31 and the adhesion detection mechanism 32 respectively embedded in two independent receiving slots 12 and connected to different positions on the circuit board. In this case, the adhesion detection mechanism 32 only serves to obtain the on / off signal of the contact 2 and does not have a heat conduction function. The adhesion detection mechanism 32 may not have a heat-conducting plate 322, only retaining the contact piece 321, the second connecting line 323, and the second external connecting piece 324. However, in order to better fix the temperature sensor 311, the temperature sensor 311 still needs a heat-conducting plate 322 as a carrier when connected to the contact 2. The temperature detection mechanism 31 should include a heat-conducting plate 322, a first connecting line 312, and a first external connecting piece 313.

[0055] In some alternative embodiments, there are two first connecting lines 312 and two first external connecting pieces 313, with one first connecting line 312 connected to one first external connecting piece 313.

[0056] Two first connecting lines 312 and two first external connecting pieces 313 connect the temperature sensor 311 in series in the detection circuit to form a complete loop. The corresponding temperature is calculated by detecting the resistance of the temperature sensor 311. The adhesion detection mechanism 32 only needs to detect the continuity of the contact, and only one second connecting line 323 and one second external connecting piece 324 are needed to connect the contact 2 to the detection circuit.

[0057] In some alternative embodiments, the relay has a first orientation, the outer surface 11 includes a first surface 111 disposed opposite to each other along the first orientation, a second surface 113 and a side surface 112 connected between the first surface 111 and the second surface 113, the contact 2 is disposed on the first surface 111, and the receiving groove 12 extends from the first surface 111 through the side surface 112 to the second surface 113.

[0058] like Figure 3 As shown, in this embodiment, the receiving groove 12 extends from the first surface 111 where the contact 2 is located, through the side 112, to the second surface 113 opposite to the first surface 111. The second surface 113 is connected to the external detection circuit. In actual operation, the relay is inverted in the battery pack, and the contact 2 rests against the mounting plane adjacent to the first surface 111. The first surface 111 has no wiring conditions, and the first connecting wire 312 and the second connecting wire 323 need to be led out to other surfaces for soldering. However, multiple relays are usually arranged side by side in the battery pack, and the side 112 of the relay is in close contact with the adjacent relay, with limited space for soldering. Therefore, the side 112 is not suitable for wiring. The receiving groove 12 extends through the side 112 to the second surface 113, and the contact detection device 3 is connected to the external detection circuit on the second surface 113. This provides a larger operating space, making it easier for the operator to solder the first connecting piece and the second connecting piece to the connecting piece of the circuit board.

[0059] In some alternative embodiments, the receiving slot 12 includes: a contact segment 121, a connecting line segment 122, and an external connecting segment 123; wherein, the contact segment 121 is located on the first surface 111, one end of the contact segment 121 is provided with a contact 2, and the other end is connected to the connecting line segment 122, a contact piece 321, a heat-conducting piece 322, and a temperature sensor 311 are disposed on the contact segment 121, and the heat-conducting piece 322 and the temperature sensor 311 are stacked along a first direction; one end of the connecting line segment 122 is located on the first surface 111 and is connected to the contact segment 121, and the other end extends through the side 112 to the second surface 113 and is connected to the external connecting segment 123, and the first connecting line 312 and the second connecting line 323 are embedded side by side in the connecting line segment 122; the external connecting segment 123 is located on the second surface 113, and the first external connecting piece 313 and the second external connecting piece 324 are embedded in the external connecting segment 123.

[0060] The shape of the receiving groove 12 matches the shape of the contact detection device 3. According to the structure of the contact detection device 3, the receiving groove 12 can be divided into contact segment 121, connecting line segment 122, and external connection segment 123.

[0061] The contact segment 121 is located on the first surface 111, and the relay contact 2 is disposed on the contact segment 121. The contact segment 121 is used to accommodate the contact piece 321, the heat-conducting piece 322, and the temperature sensor 311 of the temperature detection mechanism 31 of the contact detection device 3.

[0062] The connecting line segment 122 connects to the contact segment 121 on the first surface 111 and then extends to the second surface 113 via the side 112. In the connecting line segment 122, the first connecting line 312 and the second connecting line 323 are embedded side by side. This layout not only saves space but also helps to reduce mutual interference and improve the quality of signal transmission.

[0063] The external connection segment 123 is located on the second surface 113 to facilitate connection with external devices, and the embedding of the first external connection piece 313 and the second external connection piece 324 further enhances the strength and stability of the connection.

[0064] The contact segment 121, connecting segment 122, and external connection segment 123 are sequentially connected, forming a complete circuit channel for the contact detection device 3 within the entire receiving groove 12, ensuring smooth signal transmission and effective heat dissipation. By segmenting the receiving groove 12, its shape can better fit various positions of the contact detection device 3, allowing the contact detection device 3 to be firmly fixed in the receiving groove 12 without additional fixing measures. For better fixing, epoxy resin can also be injected for fixation after the contact detection device 3 is embedded in the receiving groove 12.

[0065] In some alternative embodiments, the contact segment 121 includes a first sub-contact segment 1211 and a second sub-contact segment 1212 connected together; one end of the first sub-contact segment 1211 is provided with a contact 2, and the other end is connected to the second sub-contact segment 1212, and a contact piece 321 is disposed on the first sub-contact segment 1211; one end of the second sub-contact segment 1212 is connected to the first sub-contact segment 1211, and the other end is connected to the connecting line segment 122, and a heat-conducting sheet 322 and a temperature sensor 311 are disposed on the second sub-contact segment 1212, and the heat-conducting sheet 322 and the temperature sensor 311 are stacked along a first direction.

[0066] When the adhesion detection mechanism 32 includes a contact piece 321, the contact segment 121 connected to the contact 2 of the receiving groove 12 is divided into a first sub-contact segment 1211 for receiving the contact piece 321 and a second sub-contact segment 1212 for receiving the heat-conducting sheet 322 and the temperature sensor 311.

[0067] Additionally, in some optional embodiments, a second direction perpendicular to the first direction is also provided; along the second direction, two first connecting lines 312 are spaced apart and a second connecting line 323 is located between the two first connecting lines 312; along the second direction, two first external connecting pieces 313 are spaced apart and a second external connecting piece 324 is located between the two first external connecting pieces 313.

[0068] like Figure 4 As shown, two first connecting lines 312 and one second connecting line 323 are embedded side by side in the connecting line segment 122 of the receiving groove 12. Furthermore, the connecting line segment 122 can be divided into three parts arranged side by side along the second direction, which are used to accommodate the two first connecting lines 312 and one second connecting line 323 respectively. This results in better fixing effect, clearer wiring and easier organization, and improves the stability and reliability of each connecting line, ensuring signal transmission quality.

[0069] This utility model embodiment also provides a battery pack, including any of the relays provided in the above embodiments.

[0070] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0071] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the present invention.

[0072] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0073] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A relay, characterized in that, The relay includes a housing (1), a contact (2), and a contact detection device (3); the contact (2) is disposed on the housing (1), the housing (1) has an outer surface (11) and a receiving groove (12) is provided on the outer surface (11), the contact (2) is disposed at one end of the receiving groove (12), and the contact detection device (3) is embedded in the receiving groove (12) and connected to the contact (2).

2. The relay according to claim 1, characterized in that, The contact detection device (3) includes a temperature detection mechanism (31) and an adhesion detection mechanism (32) disposed in the receiving groove (12); the adhesion detection mechanism (32) is at least partially disposed on the bottom wall of the receiving groove (12) and located between the temperature detection mechanism (31) and the bottom wall of the receiving groove (12); the adhesion detection mechanism (32) is connected to the contact (2), the temperature detection mechanism (31) is connected to the end of the adhesion detection mechanism (32) near the contact (2), and there is a gap between the temperature detection mechanism (31) and the contact (2).

3. The relay according to claim 2, characterized in that, The temperature detection mechanism (31) includes a temperature sensor (311), and the adhesion detection mechanism (32) includes a heat-conducting sheet (322). The heat-conducting sheet (322) is connected to the contact (2); the temperature sensor (311) is disposed on the heat-conducting sheet (322) and has a gap between it and the contact (2).

4. The relay according to claim 3, characterized in that, The temperature detection mechanism (31) further includes a first connecting line (312) and a first external connecting piece (313). One end of the first connecting line (312) is connected to the temperature sensor (311), and the other end of the first connecting line (312) is connected to the first external connecting piece (313). The adhesion detection mechanism (32) further includes a second connecting line (323) and a second external connecting piece (324). One end of the second connecting line (323) is connected to the contact (2), and the other end is connected to the second external connecting piece (324). The heat-conducting sheet (322) is disposed at one end of the second connecting line (323) near the contact (2) and is connected to the contact (2).

5. The relay according to claim 4, characterized in that, The adhesion detection mechanism (32) further includes a contact piece (321), which is disposed between the heat-conducting sheet (322) and the contact point (2).

6. The relay according to claim 5, characterized in that, There are two first connecting lines (312) and two first external connecting pieces (313), with one first connecting line (312) connected to one first external connecting piece (313).

7. The relay according to claim 6, characterized in that, The relay has a first direction, the outer surface (11) includes a first surface (111), a second surface (113) disposed opposite to each other along the first direction, and a side surface (112) connected between the first surface (111) and the second surface (113), the contact (2) is disposed on the first surface (111), and the receiving groove (12) extends from the first surface (111) through the side surface (112) to the second surface (113).

8. The relay according to claim 7, characterized in that, The receiving slot (12) includes: a contact segment (121), a connecting line segment (122), and an external connection segment (123); wherein, The contact segment (121) is located on the first surface (111). One end of the contact segment (121) is provided with the contact (2), and the other end is connected to the connecting line segment (122). The contact piece (321), the heat-conducting piece (322), and the temperature sensor (311) are disposed on the contact segment (121). The heat-conducting piece (322) and the temperature sensor (311) are stacked along the first direction. One end of the connecting line segment (122) is located on the first surface (111) and communicates with the contact segment (121), and the other end extends through the side (112) to the second surface (113) and communicates with the external connecting segment (123). The first connecting line (312) and the second connecting line (323) are embedded side by side in the connecting line segment (122). The external connection segment (123) is located on the second surface (113), and the first external connection piece (313) and the second external connection piece (324) are embedded in the external connection segment (123).

9. The relay according to claim 8, characterized in that, The contact segment (121) includes a first sub-contact segment (1211) and a second sub-contact segment (1212) connected together. One end of the first sub-contact segment (1211) is provided with the contact (2), and the other end is connected to the second sub-contact segment (1212). The contact piece (321) is disposed on the first sub-contact segment (1211). One end of the second sub-contact segment (1212) is connected to the first sub-contact segment (1211), and the other end is connected to the connecting line segment (122). The heat-conducting sheet (322) and the temperature sensor (311) are disposed on the second sub-contact segment (1212), and the heat-conducting sheet (322) and the temperature sensor (311) are stacked along the first direction.

10. The relay according to claim 7, characterized in that, It also has a second direction perpendicular to the first direction; Along the second direction, two first connecting lines (312) are spaced apart and the second connecting line (323) is located between the two first connecting lines (312); Along the second direction, two first external connecting pieces (313) are spaced apart and the second external connecting piece (324) is located between the two first external connecting pieces (313).

11. A battery pack, characterized in that, Including the relay as described in any one of claims 1-10.

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