Integrated relay, battery pack and vehicle

Abstract

The utility model relates to the technical field of electrical systems of new energy automobiles, in particular to an integrated relay, a battery pack and a vehicle. The first relay, the second relay, the arc extinguish chamber and the linkage assembly are integrated in the relay body, the linkage assembly is arranged in the arc extinguish chamber, the linkage assembly is connected with the first relay and the second relay, and the first relay and the second relay are linked and attracted through the linkage assembly. Therefore, the problems of insufficient space of an electrical area in the battery pack, wrong pull-in of the quick charge relay and the like are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile electrical system technical field, especially to a kind of integrated relay, battery pack and vehicle. BACKGROUND

[0002] Under the promotion of environmental protection policy and market demand driving, new energy automobile industry is flourishing, its holding quantity continues to rise, battery as core component, faces energy density promotion, charging time shortening and safety guarantee and many challenges and breakthrough opportunities.

[0003] The electrical area in the battery pack of the related art is used to arrange high-voltage devices such as BDU (Battery Disconnect Unit), but in order to improve the power, more battery cells need to be arranged, which leads to the gradual reduction of the available space in the electrical area. In addition, during project development, it is often found that the fast-charging relay cannot be closed according to the predetermined design timing, which can cause fast-charging failure. This phenomenon affects the user experience and can cause safety hazards. SUMMARY

[0004] The utility model provides a kind of integrated relay, battery pack and vehicle to solve the problems of insufficient space in the electrical area of battery pack and fast-charging relay error attraction.

[0005] The utility model provides a kind of integrated relay in the first aspect, comprising: relay body;First relay, second relay, arc-extinguishing chamber and linkage assembly integrated in relay body, wherein the linkage assembly is arranged inside the arc-extinguishing chamber, the linkage assembly is connected with the first relay and the second relay respectively, and the first relay and the second relay are linked and attracted by the linkage assembly;First connector and first to third connecting columns arranged on the relay body, wherein the first connecting column is the high-voltage input connecting column of the first relay, the second connecting column is the high-voltage connecting column shared by the first relay and the second relay, and the third connecting column is the high-voltage output connecting column of the second relay.

[0006] Optionally, the linkage assembly includes a first movable contact, a conducting body, a connecting structure, first and second conductive sheets, an insulating column and a coil via column, wherein the first movable contact is the movable contact of the first relay, the connecting structure is used to connect the conducting body and the movable contact, the insulating column fixes the first conductive sheet, the first movable contact and the conducting body are connected with the connecting structure respectively, the first conductive sheet is connected with the positive electrode of the coil of the first relay, and the second conductive sheet is connected with the positive electrode of the coil of the second relay;When the first movable contact moves upward under the action of the magnetic field generated by the energization of the first relay coil, the conducting body moves with the first movable contact to conduct the first and second conductive sheets, and the coil via column penetrates the arc-extinguishing chamber to guide the coil wire from the outside of the arc-extinguishing chamber into the inside of the arc-extinguishing chamber.

[0007] Optionally, the linkage assembly further comprises first to third input terminals, wherein the first input terminals are connected to the positive poles of the coils of the first and second relays respectively, the second input terminal is connected to the negative pole of the coil of the first relay, and the third input terminal is connected to the negative pole of the coil of the second relay.

[0008] Optionally, the first movable contact and the connecting structure are connected by welding, and the via of the coil via column is sealed by welding or glue filling.

[0009] Optionally, the linkage assembly further comprises a second movable contact and an insulator arranged between the conducting body and the connecting structure, wherein the second movable contact is the movable contact of the second relay.

[0010] Optionally, the arc extinguishing chamber comprises a bottom plate and an upper cover, wherein the insulating column is fixed to the upper cover by brazing.

[0011] Optionally, the relay body comprises a lower relay shell and an upper relay shell.

[0012] The utility model discloses a second aspect provides a kind of battery pack, comprising: first integrated relay and second integrated relay, wherein, first integrated relay and second integrated relay are integrated relay of any one of above-mentioned;Power battery module, battery management system, resistance, pre-charging relay, second connector and third connector, wherein, battery management system is connected with first integrated relay, second integrated relay and pre-charging relay respectively, the anode of power battery module is connected with one end of first integrated relay and one end of resistance respectively, the other end of resistance is connected with one end of pre-charging relay, pre-charging relay is connected with the first connector of first integrated relay and one end of second connector, the other end of first integrated relay is connected with one end of third connector, the negative pole of power battery module is connected with one end of second integrated relay, the first connector of second integrated relay is connected with the second connector of two ends, the other end of second integrated relay is connected with the other end of third connector.

[0013] The utility model discloses a third aspect further provides a kind of vehicle, comprising above-mentioned battery pack.

[0014] Therefore, the utility model at least has following beneficial effects:

[0015] The utility model discloses an integrated relay is provided, which is applied to a battery pack, and the integrated relay comprises a relay body, a first relay and a second relay integrated in the relay body, and a linkage assembly.

[0016] Additional aspects and advantages of the utility model will be in part apparent and in part apparent from the following description, or will be learned by practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

[0018] Figure 1 A block schematic diagram of an integrated relay according to an embodiment of the utility model is provided;

[0019] Figure 2 A structural schematic diagram of an integrated relay according to an embodiment of the utility model is provided;

[0020] Figure 3 A structural schematic diagram of an integrated relay module installed with a fastening nut according to an embodiment of the utility model is provided;

[0021] Figure 4 A block schematic diagram of a battery pack according to an embodiment of the utility model is provided;

[0022] Figure 5 A high-voltage principle diagram of a battery pack according to an embodiment of the utility model is provided.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1101 is first relay coil positive pole, 1102 is first relay coil negative pole, 1103 is second relay coil negative pole, 1104 is second relay coil positive pole, 1105 is first connector, 1106 is arc chamber upper cover, 1107 is first connecting column, 1108 is second connecting column, 1109 is third connecting column, 1110 is second movable contact, 1111 is first movable contact, 1112 is conducting body, 1113 is connecting structure, 1114 is insulator, 1115 is relay lower shell, 1116 is relay upper shell;

[0025] 1117 is a first conductive sheet, 1118 is an insulating column, 1119 is a first input terminal, 1120 is a second input terminal, 1121 is a third input terminal, 1122 is an arc chamber bottom plate, 1123 is a second conductive sheet, and 1124 is a coil via column.

[0026] 1118 is fixed with 1122 by brazing, used for fixing 1117, 1111 is combined with 1113 by welding, 1114 is an insulator, used for fixing 1112 and 1113 together. When 1111 moves upward under the action of the magnetic field generated by the energization of the first relay coil, 1112 will also move in linkage with 1111 and conduct 1117 and 1123. 1124 penetrates 1122, leads the coil wire from the outside of the arc chamber into the inside of the arc chamber, and seals the via by welding or glue pouring process.

[0027] 100 is a power battery module, 101 is a battery management system, 104 is a resistor, 105 is a pre-charging relay, 108 is a second connector, 109 is a third connector, 110 is a first integrated relay, and 111 is a second integrated relay. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0029] New energy vehicles have developed to today, and integrated design is still a problem to be solved. At present, the electrical area in the battery pack is used to arrange BDU high-voltage devices, but the limited space in the battery pack needs to arrange more battery cells to improve the power, and the space of the electrical area is getting smaller and smaller. The integrated design of high-voltage relays becomes very necessary.

[0030] In addition, there will be cases of fast charging relay failure caused by not closing according to the design timing in the project development process. Therefore, the present application integrates the main relay and the fast charging relay by a design, and the attraction of the fast charging relay is controlled by the main relay linkage.

[0031] This integrated relay design is a scheme design applied to the fast charging circuit integrated in the battery pack. The attraction of the fast charging relay is controlled by the BMS, and the coil circuit controlled by the fast charging relay is controlled by the main relay linkage. Before the main relay is not attracted, even if the low-side drive of the BMS to the fast charging relay is effective, the fast charging relay cannot be attracted.

[0032] Thus, the integrated relay integrates the first relay and the second relay in the relay body, the linkage assembly not only realizes linkage attraction of the two, but also accurately controls the attraction sequence of the relay through specific connection structure and component layout, such as cooperative work of the conducting body, the conducting sheet and the like, thereby avoiding false attraction of the fast charging relay, ensuring stability and reliability of the fast charging process, meanwhile, the integrated design reduces the number of external high-voltage connection points, optimizes the layout of the electrical area in the battery pack from the structure, so that more battery cells can be arranged in the limited space, thereby improving the battery capacity; after the integrated relay is used, the connection between components such as the power battery module, the battery management system, the resistor, the pre-charging relay and the like is more reasonable and orderly, the battery management system can more accurately control the working state of the relay, thereby ensuring efficient operation of the entire battery pack, not only improving the performance of the battery pack, but also reducing the risk caused by unreasonable component layout or relay misoperation, enhancing the safety of the battery pack; finally, the vehicle is equipped with such a battery pack, ensuring that the fast charging can be more stable and efficient, reducing charging failures caused by problems of the fast charging relay, and improving the user experience.

[0033] Specifically, Figure 1 A block diagram of an integrated relay provided by the utility model embodiment is shown as Figure 1 The integrated relay 1000 comprises a relay body 1001, a first relay 1002, a second relay 1003, an arc extinguishing chamber 1004, a linkage assembly 1005, a first connector 1105, a first connecting column 1107, a second connecting column 1108 and a third connecting column 1109.

[0034] As shown in Figure 2 The linkage assembly is arranged in the arc extinguishing chamber, and is connected with the first relay and the second relay respectively, so that the first relay and the second relay are attracted in linkage through the linkage assembly; the first connecting column is a high-voltage input connecting column of the first relay, the second connecting column is a high-voltage connecting column shared by the first relay and the second relay, and the third connecting column is a high-voltage output connecting column of the second relay.

[0035] It can be understood that the relay body of the embodiment of the utility model provides integrated infrastructure for the first relay, the second relay, the arc extinguishing chamber and other components, guarantees the stability of the overall structure; the integrated design of the first relay and the second relay realizes linkage attraction through the linkage assembly, effectively avoids the condition of false attraction of the second relay, improves the reliability and safety in the fast charging process, ensures the normal operation of the vehicle fast charging function, avoids the problem of fast charging failure caused by the false operation of the relay; the arc extinguishing chamber helps to extinguish the electric arc in the relay action process, protects the relay contact, prolongs the service life of the relay, and improves the safety of the system; the linkage assembly accurately controls the attraction sequence of the relay through reasonable structure design, further enhances the stability and reliability of the relay work; the first connector facilitates the connection with the external control system, and is convenient for the battery management system to control the relay; the first connecting column, the second connecting column and the third connecting column clarify the high-voltage input and output connection point, optimize the electrical connection path, reduce the number of external high-voltage connection points, are beneficial to the reasonable use of the electrical area space in the battery pack, provide the possibility for the battery pack to arrange more battery cells, thereby improve the battery capacity, and to a certain extent, reduce the cost and weight.

[0036] In an embodiment of the utility model, the linkage assembly 1005 includes a first moving contact, a conducting body, a connecting structure, a first to second conductive sheet, an insulating column and a coil via column, wherein the first moving contact is the moving contact of the first relay 1002, the connecting structure is used for connecting the conducting body and the moving contact, the insulating column fixes the first conductive sheet, the first moving contact and the conducting body are connected with the connecting structure respectively, the first conductive sheet is connected with the positive electrode of the coil of the first relay 1002, and the second conductive sheet is connected with the positive electrode of the coil of the second relay 1003; when the first moving contact moves upward under the magnetic field generated by the coil electrification of the first relay 1002, the conducting body moves with the first moving contact and conducts the first to second conductive sheet, and the coil via column penetrates the arc extinguishing chamber 1004 and leads the coil wire from the outside of the arc extinguishing chamber 1004 into the inside of the arc extinguishing chamber 1004.

[0037] It can be understood that, as Figure 2As shown, the first moving contact of the embodiment of the utility model is the moving contact of the first relay, which moves upward under the magnetic field generated by the energization of the coil, which triggers the conduction of the moving contact, and then the first to second conductive sheets are conducted, thereby realizing the effective linkage of the first relay and the second relay in the attraction action, when the first relay attraction action occurs, the attraction timing of the second relay can be accurately controlled, ensuring that the second relay works strictly according to the set timing, avoiding the fast charging failure caused by not closing according to the design timing, greatly improving the reliability and stability of fast charging, ensuring the normal realization of the fast charging function of new energy vehicles, at the same time, the insulating column fixes the first conductive sheet, effectively preventing the short circuit risk between the conductive sheets, ensuring the safety and stability of the circuit, the coil via column penetrates the arc extinguishing chamber to guide the coil wire from the outside to the inside, not only ensuring the reasonable layout of the coil wire, but also preventing electrical interference inside and outside the arc extinguishing chamber through its sealing measures (welding or glue sealing), further improving the safety and reliability of the entire relay system.

[0038] In an embodiment of the utility model, the linkage assembly 1005 further includes first to third input terminals, wherein the first input terminal is connected with the positive electrode of the coil of the first relay 1002 and the positive electrode of the coil of the second relay 1003 respectively, the second input terminal is connected with the negative electrode of the coil of the first relay 1002, and the third input terminal is connected with the negative electrode of the coil of the second relay 1003.

[0039] It can be understood that, as Figure 3 As shown, the first input terminal of the embodiment of the utility model is connected with the positive electrode of the coil of the first relay and the positive electrode of the coil of the second relay respectively, this connection mode can uniformly manage and control the positive electrodes of the coils of the two relays when the external control signal is input, ensuring that when the first relay attraction action triggers the related control logic, the power supply state of the second relay can be affected at the same time, thereby ensuring the correlation and coordination of the first relay and the second relay in the attraction control, effectively preventing the second relay from being attracted incorrectly when the first relay is not attracted, avoiding the fast charging failure; the second input terminal is connected with the negative electrode of the coil of the first relay, and the third input terminal is connected with the negative electrode of the coil of the second relay, the two input terminals provide independent connection paths for the negative electrodes of the coils of the two relays, facilitating accurate control and monitoring of the working state of the two relays, so that the on-off state of the two relays can be accurately adjusted according to different working condition requirements in the entire relay system working process, further optimizing the control logic of the high-voltage circuit in the battery pack, improving the stability and reliability of the electrical system in the battery pack, ensuring the safety and efficiency of new energy vehicles in the charging and running process, and at the same time, it is also helpful to realize more reasonable electrical layout in the limited space of the battery pack, improving the overall performance.

[0040] In an embodiment of the utility model, first moving contact and connecting structure are connected through welding, and the via of coil via column is sealed through welding or pouring glue.

[0041] It can be understood that, first moving contact and connecting structure are connected through welding in the embodiment of the utility model, which can provide stable and reliable connection, ensure that there is no looseness or displacement between first moving contact and connecting structure when first relay coil is electrified to generate magnetic field and make first moving contact move, thereby ensuring that on -off body can accurately follow first moving contact linkage, stably turn on first to second conductive sheet, realize accurate control to second relay attraction, effectively avoid second relay misoperation caused by unstable connection, and guarantee the reliability of fast charging process, the via of coil via column is sealed through welding or pouring glue, which can effectively prevent external dust, moisture and other impurities from entering the inside of arc extinguishing chamber, avoid electrical short circuit or other faults caused by impurities, ensure the stability of electrical environment in arc extinguishing chamber, and ensure safe and reliable operation of relay system.

[0042] In an embodiment of the utility model, linkage assembly 1005 further includes second moving contact and insulator arranged between on -off body and connecting structure, wherein second moving contact is the moving contact of second relay 1003.

[0043] It can be understood that, as shown in Figure 2 Second moving contact in the embodiment of the utility model is the moving contact of second relay, which can form complementary control signal source with first moving contact, so that the relay system can more flexibly adjust the attraction order, time interval and other parameters of first relay and second relay when facing different charging requirements, battery state or external instructions, thereby optimizing the control logic of fast charging process, ensuring safe and efficient fast charging function in various situations, avoiding fast charging failure or unstable situation caused by single control, and effectively preventing short circuit and other faults caused by misdirected electricity in high-voltage environment, the insulation design ensures the accuracy and safety of electrical connection between components, which ensures the accuracy of first relay control on second relay, prevents fast charging relay from being attracted due to electrical interference, thereby preventing fast charging failure, improving the reliability and stability of the entire battery pack fast charging system, and good insulation performance also helps to realize more reasonable electrical layout in the limited space of battery pack, because it is not necessary to additionally set up too many protective measures to avoid possible electrical conduction problem, thereby providing more space for the arrangement of other components in the battery pack, which indirectly helps to improve the energy density and other performance indicators of the battery pack.

[0044] In an embodiment of the utility model, the arc extinguishing chamber 1004 includes a bottom plate and an upper cover, wherein the insulating column is fixed with the upper cover through brazing.

[0045] It can be understood that, as shown in the drawings, Figure 3 The arc extinguishing chamber structure constituted by the bottom plate and the upper cover provides effective limitation and extinction time for the electric arc generated in the action process of the relay, can quickly extinguish the electric arc, protects the contact of the relay from being eroded by the electric arc, significantly prolongs the service life of the relay, and ensures that the relay works stably and reliably for a long time.

[0046] In an embodiment of the utility model, the relay body 1001 includes a relay lower shell and a relay upper shell.

[0047] It can be understood that, as shown in the drawings, Figure 2 The relay body of the utility model embodiment is constituted by the relay lower shell and the relay upper shell, provides physical protection for the internal components such as the first relay, the second relay, the arc extinguishing chamber and the linkage assembly, effectively prevents the erosion and interference of external dust, moisture, foreign matters and the like on the internal precision components, ensures that the components work in a relatively stable and clean environment, and thus improves the reliability and stability of the entire relay system.

[0048] The integrated relay provided by the embodiment of the utility model has a relay body which provides integrated architecture and physical protection for internal components, guarantees stability and prevents external interference, and improves overall reliability; the integrated and linkage assembly design of the first relay and the second relay realizes precise linkage attraction, effectively avoids false attraction of the second relay, ensures normal function of vehicle fast charging, improves reliability and safety of fast charging, and prevents fast charging failure caused by misoperation; the arc extinguishing chamber quickly extinguishes arc through the bottom plate and the upper cover structure, protects the contact, prolongs the service life of the relay, improves the safety of the relay, and the brazing fixation between the insulating column and the upper cover enhances the insulation performance and stability; the cooperative work between the first movable contact, the conducting body and other components in the linkage assembly can precisely control the attraction sequence and enhance stability; the first to third input terminals optimize control logic, facilitate precise regulation of relay on-off, improve stability and reliability of the electrical system, and are beneficial to reasonable use of battery pack space and performance improvement; the welding of the first movable contact and the connecting structure and the coil via hole column sealing guarantee the stability of component connection, electrical environment stability, and avoidance of faults; the second movable contact and the insulator further ensure control accuracy and electrical safety, and prevent fast charging failure; the lower shell and the upper shell of the relay constitute a body which is convenient to install, maintain and overhaul, and comprehensively improves the stability, safety and overall performance of high-voltage devices in the battery pack of the new energy vehicle.

[0049] The utility model discloses a unique relay integrated design, especially the linkage control mechanism of the first relay to the second relay attraction, effectively prevents the occurrence of the second relay false attraction.

[0050] In addition, to prevent the second relay false attraction, a relay A control input can be designed in front of the second relay high-side drive of BMS, when the first relay high-side drive is effective, relay A is attracted at the same time, and then the second relay high-side drive can be realized.

[0051] Figure 4 The utility model discloses a battery pack's frame diagram.

[0052] As Figure 4 The battery pack 400 includes a first integrated relay 110, a second integrated relay 111, a power battery module 100, a battery management system 101, a resistor 104, a pre-charging relay 105, a second connector 108 and a third connector 109.

[0053] The first integrated relay 110 and the second integrated relay 111 are any integrated relay described above; the battery management system 101 is connected with the first integrated relay 110, the second integrated relay 111 and the pre-charging relay 105 respectively; the positive pole of the power battery module 100 is connected with one end of the first integrated relay 110 and one end of the resistor 104; the other end of the resistor 104 is connected with one end of the pre-charging relay 105; the pre-charging relay 105 is connected with one end of the first connector 1105 and the second connector 108 of the first integrated relay 110; the other end of the first integrated relay 110 is connected with one end of the third connector 109; the negative pole of the power battery module 100 is connected with one end of the second integrated relay 111; the first connector 1105 of the second integrated relay 111 is connected with the other end of the second connector 108; and the other end of the second integrated relay 111 is connected with the other end of the third connector 109.

[0054] It can be understood that, as shown in the drawings, Figure 5 The first integrated relay and the second integrated relay used in the battery pack of the utility model embodiment are integrated relays with excellent performance described above, the internal structure and working principle of which ensure the reliability and stability of the relay action and lay a foundation for the overall performance of the battery pack; the battery management system is connected with the first integrated relay, the second integrated relay and the pre-charging relay respectively, so that the battery management system can accurately and efficiently control the working state of each relay and realize accurate management of the charging and discharging process of the battery pack; the power battery module is an energy source, the positive pole of which is connected with one end of the first integrated relay and one end of the resistor, and the resistor cooperates with the pre-charging relay to play a role of current limiting protection in the pre-charging process, preventing damage to circuit elements caused by current impact and prolonging the service life of each component in the battery pack, while ensuring that the pre-charging process is safely and stably performed; the pre-charging relay is connected with one end of the first connector and the second connector of the first integrated relay, and the other end of the first integrated relay is connected with one end of the third connector, so that the connection path of the high-voltage circuit is optimized, the reliability and stability of the electrical connection are improved, and the risk of failure caused by connection problems is reduced; the negative pole of the power battery module is connected with one end of the second integrated relay, the first connector of the second integrated relay is connected with the other end of the second connector, and the other end is connected with the other end of the third connector, so that the normal conduction and control of the negative pole loop are ensured, the positive pole loop works cooperatively, and the complete charging and discharging function of the battery pack is realized.

[0055] According to the battery pack provided by the embodiment of the utility model, the first and second integrated relays with excellent performance are adopted, the reliability and stability of the relay action are ensured, the foundation for the overall performance of the battery pack is laid, the connection of the battery management system, the first and second integrated relays and the pre-charging relay is adopted, the accurate and efficient control of the working state of each relay is realized, the management of the charging and discharging process of the battery pack is optimized, the smooth transition of the current in the charging process is ensured, the damage of the circuit components caused by the current impact is avoided, the service life of each component in the battery pack is prolonged, and the safety and stability of the pre-charging process are ensured, in addition, the reasonable connection of the positive and negative poles of the power battery module and the specific ports of the integrated relay and the optimized high-voltage circuit connection path between the pre-charging relay and the integrated relay improve the reliability and stability of the electrical connection and reduce the risk of failure caused by connection problems.

[0056] The utility model embodiment further provides a vehicle, including above-mentioned battery pack.

[0057] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of different embodiments or examples without contradiction.

[0058] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0059] Those skilled in the art of the present technology can understand that all or part of the steps carried out by the above-mentioned embodiment method can be instructed by the program to complete the relevant hardware, and the program can be stored in a computer readable storage medium. When the program is executed, it includes one of the steps of the method embodiment or its combination.

Claims

1. An integrated relay characterized by, The relay body comprises: a first relay, a second relay, an arc-extinguishing chamber and a linkage assembly integrated in the relay body, wherein the linkage assembly is arranged inside the arc-extinguishing chamber, the linkage assembly is connected with the first relay and the second relay respectively, and the linkage assembly makes the first relay and the second relay linkage attraction. The linkage assembly comprises a first movable contact, a conducting body, a connecting structure, first and second conductive sheets, an insulating column and a coil via column, wherein 2. The integrated relay of claim 1, wherein, the first movable contact is a movable contact of the first relay, the connecting structure is used for connecting the conducting body and the movable contact, the insulating column fixes the first conductive sheet, the first movable contact and the conducting body are connected with the connecting structure respectively, the first conductive sheet is connected with a positive electrode of a coil of the first relay, and the second conductive sheet is connected with a positive electrode of a coil of the second relay; when the first movable contact moves upward under the action of a magnetic field generated by energization of a coil of the first relay, the conducting body moves linkage with the first movable contact to conduct the first and second conductive sheets, and the coil via column penetrates the arc-extinguishing chamber to lead coil wires from outside the arc-extinguishing chamber into inside the arc-extinguishing chamber. The linkage assembly further comprises first to third input terminals, wherein the first input terminal is connected with the positive electrode of the coil of the first relay and the positive electrode of the coil of the second relay respectively, the second input terminal is connected with a negative electrode of the coil of the first relay, and the third input terminal is connected with a negative electrode of the coil of the second relay.

3. The integrated relay of claim 2, wherein, The first movable contact and the connecting structure are connected by welding, and the via of the coil via column is sealed by welding or glue filling.

4. The integrated relay of claim 2, wherein, The linkage assembly further comprises a second movable contact and an insulator arranged between the conducting body and the connecting structure, wherein the second movable contact is a movable contact of the second relay.

5. The integrated relay of claim 2, wherein, The arc-extinguishing chamber comprises a bottom plate and an upper cover, wherein the insulating column is fixed with the upper cover by brazing.

6. The integrated relay of claim 2, wherein, The relay body comprises a lower relay housing and an upper relay housing.

7. The integrated relay of claim 1, wherein, Further comprising:

8. The integrated relay of claim 1, wherein, a first connector and first to third connecting columns arranged on the relay body, wherein the first connecting column is a high-voltage input connecting column of the first relay, the second connecting column is a high-voltage connecting column shared by the first relay and the second relay, and the third connecting column is a high-voltage output connecting column of the second relay. The relay body comprises:

9. A battery pack, characterized by, a first integrated relay and a second integrated relay, wherein the first integrated relay and the second integrated relay are the integrated relay of any one of claims 1-8. ​ The power battery module, the battery management system, the resistor, the pre-charging relay, the second connector and the third connector, wherein the battery management system is connected with the first integrated relay, the second integrated relay and the pre-charging relay respectively, the positive pole of the power battery module is connected with one end of the first integrated relay and one end of the resistor respectively, the other end of the resistor is connected with one end of the pre-charging relay, the pre-charging relay is connected with the first connector of the first integrated relay and one end of the second connector, the other end of the first integrated relay is connected with one end of the third connector, the negative pole of the power battery module is connected with one end of the second integrated relay, the first connector of the second integrated relay is connected with the other end of the second connector, and the other end of the second integrated relay is connected with the other end of the third connector.

10. A vehicle characterized by comprising: The battery pack comprising the battery pack of claim 9.

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