Relay, distribution box, battery pack and electric equipment

Abstract

The utility model relates to a relay, a distribution box, a battery pack and electric equipment. The relay comprises a movable contact plate, a cutting piece and a driving mechanism. The movable contact plate comprises a weak part; the cutting piece is arranged corresponding to the weak part; and the driving mechanism is used for driving the cutting piece to break the weak part. On the premise that the relay has corresponding functions of the relay, the relay also integrates a safety function, so that the overall space utilization rate is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of relays, and in particular to a relay, a distribution box, a battery pack and an electrical device. Background Art

[0002] The fuse in the battery pack is an important part of new energy vehicle insurance. With the help of advanced intelligent technology, it can realize intelligent detection of battery pack status and timely warn of battery pack failure.

[0003] In the related art, the design of relay (high-voltage contactor) in series with intelligent insurance, which is commonly used in the high-voltage circuit of electric vehicles, occupies a large space and has many fasteners, thus increasing the volume and weight of the assembly. Utility Model Content

[0004] The purpose of the present disclosure is to provide a relay, a distribution box, a battery pack and an electrical device. The relay not only has the corresponding functions of a relay, but also integrates a fuse function, thereby improving the overall space utilization.

[0005] In order to achieve the above-mentioned object, the present disclosure provides a relay in a first aspect, comprising:

[0006] Moving touch plate, including weak portion;

[0007] a cutting piece arranged corresponding to the weak portion; and

[0008] The driving mechanism is used to drive the cutting member to cut off the weak portion.

[0009] Optionally, a notch is provided at a portion of the movable touch plate facing toward and / or away from the cutting member, and the notch is used to weaken the strength of the movable touch plate to form the weak portion on the movable touch plate.

[0010] Optionally, the cutting member includes a connecting portion and a cutting portion;

[0011] The connecting portion is connected to the driving mechanism, and the cutting portion corresponds to the weak portion.

[0012] Optionally, there are two cutting portions, which are respectively connected to two ends of the connecting portion; two notches are arranged at intervals on the moving touch plate, and the cutting portions correspond to the notches one by one.

[0013] Optionally, the driving mechanism includes a driving member and a control member;

[0014] The control component is used to obtain the overcurrent signal of the relay, and control the driving component to drive the cutting component to disconnect the weak portion according to the overcurrent signal.

[0015] Optionally, the control element includes a pyrotechnic control switch; and the driving element includes an explosive.

[0016] Optionally, the relay further comprises an elastic member, two ends of which are respectively connected to the cutting member and the moving contact plate, and the elastic member can drive the cutting member away from the weak portion of the moving contact plate.

[0017] Optionally, the material hardness of the cutting piece is greater than the material hardness of the moving touch plate.

[0018] Optionally, a moving contact is formed at each of the two opposite ends of the moving contact plate, and the relay further comprises two static contacts corresponding to the moving contacts one by one;

[0019] The weak portion is located between the two moving contacts.

[0020] A second aspect of the present disclosure provides a distribution box comprising the above-mentioned relay.

[0021] A third aspect of the present disclosure provides a battery pack, comprising the above-mentioned distribution box.

[0022] According to a fourth aspect of the present disclosure, there is also provided an electrical device, comprising the above-mentioned battery pack.

[0023] Through the above technical solution, the relay disclosed in the present invention includes a moving contact plate with a weak part, a driving mechanism and a cutting piece connected to the driving mechanism. The moving contact plate is used to connect the two static contacts of the relay to achieve high-voltage circuit conduction. At the same time, the driving mechanism drives the cutting piece to disconnect the weak part of the moving contact plate to achieve power-off protection. The relay not only has the corresponding functions of the relay, but also integrates the insurance function, thereby improving the overall space utilization.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 is a structural diagram of a relay provided in some embodiments of the present disclosure.

[0027] Figure 2 It is a cross-sectional structural diagram of a relay provided in some embodiments of the present disclosure.

[0028] Figure 3 It is a structural diagram of a moving contact plate and a cutting piece of a relay provided in some embodiments of the present disclosure.

[0029] Figure 4 is a cross-sectional view of a bracket, a column, and a bolt of a relay provided in some embodiments of the present disclosure.

[0030] Figure 5 This is a structural diagram of a cutting piece of a relay provided in some embodiments of the present disclosure cutting off a moving contact plate.

[0031] Figure 6 It is a partial enlarged view of a cutting piece provided in some embodiments of the present disclosure cutting off a moving touch plate.

[0032] Description of Reference Numerals

[0033] 100-moving touch plate; 101-moving contact; 110-weak part; notch-1101; 200-cutting piece; 210-cutting part; 220-connecting part; 300-driving mechanism; 310-explosive; 320-fireworks control switch; 230-elastic piece; 240-bracket; 250-column; 260-bolt; 400-housing; 401-static contact; 402-sealed space; 403-low-voltage terminal. DETAILED DESCRIPTION

[0034] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0035] In the present disclosure, unless otherwise stated, the directional words used, such as "inside" and "outside", refer to the outline of the corresponding parts themselves. In addition, the terms "first" and "second" used in the present disclosure are to distinguish one element from another element and do not have order and importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] In the related art, the design of the relay (high-voltage contactor) in series with the intelligent insurance commonly used in the high-voltage circuit of electric vehicles occupies a large space and has many fasteners, which increases the volume and weight of the assembly. In the above technical solution, the high-voltage contactor and the intelligent insurance exist separately, and screws are needed to fasten them together, which increases the manufacturing cost, the number of screws, and the assembly labor cost and inventory management cost. In addition, the various components are combined by assembly, and certain structural features need to be designed between the matching components to achieve matching, which occupies a considerable space, thereby increasing the space volume occupied by the entire assembly, making the external space utilization rate lower.

[0037] The purpose of the present disclosure is to provide a relay, a distribution box, a battery pack and an electrical device. The relay not only has the corresponding functions of a relay, but also integrates a fuse function, thereby improving the overall space utilization.

[0038] In order to achieve the above purpose, Figures 1 to 6 As shown, an embodiment of the present disclosure provides a relay, which may include a movable contact plate 100, a cutting member 200 and a driving mechanism 300. The movable contact plate 100 includes a weak portion 110; the cutting member 200 is arranged corresponding to the weak portion 110; and the driving mechanism 300 is used to drive the cutting member 200 to disconnect the weak portion 110.

[0039] Through the above technical solution, the relay disclosed in the present invention includes a moving touch plate 100 with a weak portion 110, a driving mechanism 300 and a cutting member 200 connected to the driving mechanism 300. The moving touch plate 100 is used to connect the two static contacts 401 of the relay to achieve high-voltage circuit conduction. At the same time, the driving mechanism 300 drives the cutting member 200 to disconnect the weak portion 110 of the moving touch plate 100 to achieve power-off protection. The relay not only has the corresponding functions of the relay, but also integrates the insurance function, thereby improving the overall space utilization.

[0040] In some embodiments, a moving contact 101 is formed at each of the two opposite ends of the moving contact plate 100, and the relay further includes two static contacts 401 corresponding to the moving contacts 101 one by one; the weak portion 110 is located between the two moving contacts 101. Figure 2 As shown, the relay may include a housing 400 having a receiving cavity, two stationary contacts, a moving contact plate 100, a cutting member 200 and a driving mechanism 300. The two stationary contacts are fixedly connected to the housing 400, the moving contact plate 100 and the cutting member 200 are arranged in the receiving cavity inside the housing 400, and a moving contact 101 is formed at opposite ends of the moving contact plate 100, which is used to correspond to the stationary contact 401, and when the moving contact plate 100 moves toward the stationary contact 401, the two can abut against each other to realize the high-voltage line connection between the two stationary contacts 401; when the moving contact plate 100 moves away from the stationary contact 401, the two are separated, thereby disconnecting the high-voltage line (passive disconnection when overcurrent occurs). The weak portion 110 is located between the two moving contact points 101 of the moving touch plate 100, and the cutting piece 200 corresponds to the weak portion 110 of the moving touch plate 100, and can act on the weak portion 110 under the drive of the driving mechanism 300 to cut off the weak portion 110, thereby disconnecting the moving touch plate 100 and thus disconnecting the high-voltage line (the driving mechanism 300 actively disconnects the moving touch plate 100 through the cutting piece 200).

[0041] It is understandable that the weak portion 110 may be constructed using any suitable structure. The weak portion 110 may be formed by providing a notch 1101 on the movable touch panel 100. Figure 3 and Figure 6 As shown, in some embodiments, a notch 1101 is provided at a portion of the movable touch panel 100 facing and / or away from the cutting member 200, and the notch 1101 is used to weaken the strength of the movable touch panel 100, so as to form the weak portion 110 on the movable touch panel. For example, the notch 1101 can be provided on the side of the movable touch panel 100 facing the cutting member 200, and the notch 1101 reduces the strength of the movable touch panel 100 at the location where the notch 1101 is provided, and when the cutting member 200 acts on the weak portion 110 through the notch 1101, the movable touch panel 100 can be more easily disconnected.

[0042] In other embodiments, the notch 1101 can be set on the side of the movable touch plate 100 away from the cutting piece 200. The notch 1101 can also reduce the strength of the movable touch plate 100 at its corresponding position. When the cutting piece 200 acts on the weak portion 110, the movable touch plate 100 can be more easily disconnected.

[0043] In some other embodiments, notches 1101 can be provided on both the side of the movable touch panel 100 facing the cutting piece 200 and the side of the movable touch panel 100 facing away from the cutting piece 200. The notches 1101 on both sides can further reduce the strength of the movable touch panel 100 at this position (the position corresponding to the cutting piece 200). When the cutting piece 200 acts on the weak portion 110, it is convenient to disconnect the movable touch panel 100.

[0044] It should be noted that the above-mentioned notch 1101 includes but is not limited to V-shaped, U-shaped and other shapes. The purpose of setting the notch 1101 is to reduce the strength by reducing the thickness of the moving touch plate 100 at the position corresponding to the cutting piece 200, so that the cutting piece 200 can cut off the weak part 110 of the moving touch plate 100 more quickly.

[0045] The cutting member 200 may be constructed in any suitable structure. In some embodiments, the cutting member 200 includes a connecting portion 220 and a cutting portion 210; the connecting portion 220 is connected to the driving mechanism 300, and the cutting portion 210 corresponds to the weak portion 110. The connecting portion 220 may be directly or intermittently connected to the driving mechanism 300, or may be in abutment with the driving mechanism 300, and may be pushed when the driving mechanism 300 is in motion, so that the cutting portion 210 connected to the connecting portion 220 can cut the movable touch panel 100 at the weak portion 110.

[0046] like Figure 3As shown, in some embodiments, there may be two weak parts 110, that is, formed by two notches 1101 arranged at intervals on the movable touch panel 100, and there may also be two cutting parts 210, which are respectively connected to the two ends of the connecting part 220, and the cutting parts 210 and the notches 1101 correspond one to one. Through the above arrangement, the cutting parts 210 are constructed as two, and are respectively arranged at the opposite ends of the connecting part 220, corresponding to the two notches 1101 positions of the movable touch panel 100. On the one hand, by disconnecting the two weak parts 110 at the same time, it is ensured that the movable touch panel 100 can be completely disconnected; on the other hand, when the weak part 110 at the position of at least one notch 1101 is cut off, the movable touch panel 100 can be disconnected, that is, when one cutting part 210 fails and does not disconnect the movable touch panel 100, the other cutting part 210 can play a backup role. Therefore, the solution of using two cutting parts 210 corresponding to the weak parts 110 formed by the two notches 1101 can improve the reliability of the disconnection.

[0047] The driving mechanism 300 can be constructed using any suitable structure. In some embodiments, the driving mechanism 300 includes a driving member and a control member; the control member is used to obtain an overcurrent signal of the relay and control the driving member to drive the cutting member 200 to disconnect the weak portion 110 according to the overcurrent signal.

[0048] When the control component receives the overcurrent signal of the relay (which can be detected by the current sensor), it controls the driving component to operate, thereby pushing the cutting component 200 toward the weak portion 110 through the driving component to cut off the weak portion 110 .

[0049] It should be noted that the control component can be a controller, which is used to obtain the current signal of the relay in real time. When the current flowing through the relay is too large, for example, a short circuit occurs in the current loop, the controller obtains the overcurrent signal of the relay and controls the driving component to drive the cutting component 200 to cut the weak portion 110 of the moving touch plate 100 according to the overcurrent signal. That is to say, when the current signal obtained by the controller is greater than the preset threshold value, it indicates that a short circuit, overcurrent or other fault occurs. The controller controls the driving component to drive the cutting component 200 to cut the weak portion 110, so that the moving touch plate 100 is disconnected, thereby disconnecting the current loop and protecting the current loop. With this arrangement, the controller can obtain the current signal in real time. When the loop current is abnormal, the current loop can be disconnected in time, so that the current interruption protection can be triggered in time, thereby improving the reaction speed and further improving the safety of the relay.

[0050] It should be noted that the driving assembly may also include a driving structure such as a cylinder, an electric push rod, etc., which can be directly or indirectly connected to the cutting member 200 and can also drive the cutting member 200 to cut off the weak portion 110.

[0051] like Figure 3 and Figure 4 As shown, in some embodiments, the control member includes a pyrotechnic control switch 320; the driving member includes an explosive 310. The control member may be a pyrotechnic control switch 320, and the driving member may be an explosive 310, such as gunpowder. When the pyrotechnic control switch 320 obtains overcurrent information, the gunpowder can be ignited, thereby generating expanding gas to push the cutting member 200 to move toward the moving touch plate 100 and cut the weak portion 110.

[0052] It can be understood that the cutting piece 200 is located inside the shell 400 and can form a relatively enclosed closed space with the inner wall of the shell 400, and the explosive 310 (such as gunpowder) is arranged in the closed space. When the explosive 310 explodes under the action of the pyrotechnic control switch 320, the generated expanding gas can push the connecting part 220 of the cutting piece 200 to move, thereby disconnecting the weak part 110 through the cutting part 210 to achieve the protection function.

[0053] It should be noted that the cutting member 200 may also be fixed on a bracket 240, and the connecting plate and / or the connecting portion 220 of the cutting member 200 together with the inner side of the housing 400 form the above-mentioned enclosed space. In addition, the relay may also include a low-voltage terminal 403, which is provided on the housing 400 and is used to communicate with the control member, for example The pyrotechnic control switch 320 is electrically connected for power and / or data communication.

[0054] like Figure 2 and Figure 3 As shown, in some embodiments, the relay further includes an elastic member 230, and the two ends of the elastic member 230 are respectively connected to the cutting member 200 and the moving touch plate 100, and the elastic member 230 can drive the cutting member 200 away from the weak portion 110 of the moving touch plate 100. Among them, one end of the elastic member 230 is connected to the cutting member 200, and the other end can be connected to the moving touch plate 100, and the cutting member 200 is kept away from the weak portion 110 of the moving touch plate 100 by the elastic force of the elastic member 230. It is worth noting that the elastic member 230 includes but is not limited to a spring, and can also be other elastic springs, elastic rubber, etc.

[0055] In some embodiments, the relay also includes a bracket 240 and a column 250, wherein the column 250 is fixedly connected to the moving touch plate 100 by a bolt 260, the cutting piece 200 is fixedly connected to the bracket 240, the bracket 240 is movably sleeved on the column 250, the elastic piece 230 is sleeved on the column 250, and one end of the elastic piece 230 is connected to one end of the column 250 close to the moving touch plate 100, and the other end is connected to the bracket 240, for driving the bracket 240 and the cutting piece 200 on the bracket 240 away from the moving touch plate 100.

[0056] When the relay is in normal use, the elastic member 230 can push the cutting member 200 away from the weak portion 110 of the moving touch plate 100, and the cutting member 200 and the weak portion 110 are in a separated state; when the weak portion 110 needs to be cut off, the driving mechanism 300 drives the cutting member 200 to move toward the moving touch plate 100, and the elastic member 230 is compressed, thereby disconnecting the weak portion 110 through the cutting member 200.

[0057] In some embodiments, the material hardness of the cutting piece 200 is greater than the material hardness of the moving touch panel 100, so that the cutting piece 200 can better cut off the weak portion 110 of the moving touch panel 100, wherein the cutting piece 200 can be made of steel or cemented carbide, and the moving touch panel 100 can be made of copper or aluminum.

[0058] An embodiment of the present disclosure provides a distribution box, which includes the above-mentioned relay. Therefore, the distribution box also has all the advantages of the above-mentioned relay, which will not be repeated here.

[0059] An embodiment of the present disclosure provides a battery pack, which includes the distribution box of the above embodiment. Therefore, the battery pack also has all the advantages of the above battery pack, which will not be described one by one here.

[0060] An embodiment of the present disclosure further provides an electric device, which includes the battery pack of the above embodiment, and therefore, also has all the advantages of the battery pack.

[0061] It should be noted that electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0062] The relay, distribution box, battery pack and electrical equipment of the disclosed embodiment, the operation process of the relay includes:

[0063] When the current flowing through the relay is too large, for example, a short circuit occurs in the current loop, the pyrotechnic control switch 320 obtains the overcurrent signal of the relay and ignites the gunpowder in the sealed space 402 according to the overcurrent signal. The gunpowder explodes to generate expanding gas that pushes the cutting piece 200 and / or the bracket 240 to compress the spring. Therefore, the cutting piece 200 cuts the weak portion 110 of the moving touch plate 100, thereby disconnecting the moving touch plate 100, improving the reaction speed and further improving the safety of the relay.

[0064] The relay implemented in the present invention integrates the intelligent fuse and the relay into one, and can use the in-mold injection molding technology to distinguish between high and low voltages. It integrates the passive (overcurrent) and active (flame switch) circuit cut-off trigger mechanisms into one. The high-voltage contactor requires an excessively high short-circuit tolerance, and the matching with the contactor also becomes simple, as an integrated part replaces the original combination of multiple parts.

[0065] Furthermore, the high and low voltage ports (static contact 401 and low voltage terminal 403 ) may be integrated into the housing 400 of the embodiment of the present disclosure by integral injection molding.

[0066] The advantages of the relay, distribution box, battery pack and electrical equipment of the embodiments of the present disclosure include at least:

[0067] 1. By arranging the cutting member 200 and the driving mechanism 300 in the relay, the volume is reduced and the space utilization is improved.

[0068] 2. Reduce costs by reducing the use of screws and eliminating embedded nuts when installing panels, thereby reducing manufacturing costs and reducing labor assembly costs.

[0069] 3. When an accident is detected, the pyrotechnic control switch 320 is activated immediately. When the high-voltage circuit current is higher than the trigger current, the short-circuit current can be clamped within 1ms, and the high-voltage circuit can be cut off to protect the system and key components within 3ms. By cutting off the weak part 110 of the moving touch plate 100 with the cutting piece 200, the high-voltage DC contactor does not need too high a short-circuit tolerance, and the matching with the contactor becomes simple. There will be no fire or damage to electrical components due to the short circuit, which further improves the safety factor of the vehicle.

[0070] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0071] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0072] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A relay, characterized in that: include: Moving touch plate, including weak portion; a cutting member, arranged corresponding to the weak portion; and The driving mechanism is used to drive the cutting member to cut off the weak portion.

2. The relay according to claim 1, characterized in that: A notch is provided at a portion of the movable touch plate facing toward and / or away from the cutting member, and the notch is used to weaken the strength of the movable touch plate and to form the weak portion on the movable touch plate.

3. The relay according to claim 1 or 2, characterized in that: The cutting member comprises a connecting portion and a cutting portion; The connecting portion is connected to the driving mechanism, and the cutting portion corresponds to the weak portion.

4. The relay according to claim 3, characterized in that: There are two cutting parts, which are respectively connected to the two ends of the connecting part; and two notches are arranged on the moving touch plate at intervals; The cutting portions and the notches correspond one to one.

5. The relay according to claim 1, characterized in that: The driving mechanism comprises a driving member and a control member; The control component is used to obtain the overcurrent signal of the relay, and control the driving component to drive the cutting component to disconnect the weak portion according to the overcurrent signal.

6. The relay according to claim 5, characterized in that: The control component includes a pyrotechnic control switch; the driving component includes an explosive.

7. The relay according to claim 1, characterized in that: The relay further comprises an elastic member, two ends of which are respectively connected to the cutting member and the moving contact plate, and the elastic member can drive the cutting member away from the weak portion of the moving contact plate.

8. The relay according to claim 1, characterized in that: The material hardness of the cutting piece is greater than the material hardness of the moving touch plate.

9. The relay according to claim 1, characterized in that: The two opposite ends of the moving contact plate are respectively formed with a moving contact, and the relay further comprises two stationary contacts corresponding to the moving contacts one by one; The weak portion is located between the two moving contacts.

10. A distribution box, characterized in that: A relay comprising any one of claims 1 to 9.

11. A battery pack, characterized in that: Including the distribution box described in claim 10.

12. An electrical equipment, characterized in that: A battery pack comprising the battery pack of claim 11.

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