WO2023130616A1

WO2023130616A1 - Relay of battery, relay control policy, battery, and electric apparatus

Info

Publication number: WO2023130616A1
Application number: PCT/CN2022/088066
Authority: WO
Inventors: 李兴星; 黄小腾; 陈智明
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-01-04
Filing date: 2022-04-21
Publication date: 2023-07-13
Also published as: CN116435144A

Abstract

Provided are a relay (102) of a battery, a relay control policy, a battery (100), and an electric apparatus. The relay (102) of the battery comprises a first contact (1), a second contact (2), a detecting element (6), and a driving mechanism (3), wherein the first contact (1) is a normally-open contact, the second contact (2) is connected in series to the first contact (1), and the second contact (2) is a normally-closed contact. The detecting element (6) is used for detecting a potential difference between the first contact (1) and the second contact (2); and the driving mechanism (3) is connected to the first contact (1) and the second contact (2), and is used for controlling, according to the potential difference, the first contact (1) and the second contact (2) to open or close. The relay (102) of the battery can detect adhesion in a timely manner, and prevent the adhesion from intensifying further, thereby effectively avoiding harm caused by the adhesion.

Description

Battery relay, relay control strategy, battery and electrical device

Cross References to Related Applications

This application claims the priority of Chinese patent application 202210005225.0 entitled "Battery Relay, Relay Control Strategy, Battery and Electrical Device" filed on January 4, 2022, the entire content of which is incorporated herein by reference .

technical field

The present application relates to the field of battery technology, in particular to a battery relay, a relay control strategy, a battery and an electrical device.

Background technique

Batteries have the advantages of high specific energy and high power density, and are widely used in electronic equipment, such as mobile phones, laptop computers, battery cars, electric vehicles, electric aircraft, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc. wait.

In the development of battery technology, in addition to improving the performance of batteries, safety issues are also a problem that cannot be ignored. If the safety of the battery cannot be guaranteed, the battery cannot be used. Therefore, how to enhance the safety of batteries is a technical problem to be solved urgently in battery technology.

Contents of the invention

In view of the above problems, the present application provides a battery relay, which can enhance the safety of the battery.

In the first aspect, the present application provides a battery relay, including: a first contact, a second contact, a detection element and a driving mechanism, the first contact is a normally open contact, the second contact is connected to the first contact The points are connected in series, and the second contact is a normally closed contact. The detection element is used to detect the potential difference between the first contact and the second contact; the driving mechanism is connected to the first contact and the second contact, and the driving mechanism is used to control the closing of the first contact and the second contact according to the potential difference or disconnect.

In the technical solution of the embodiment of the present application, the drive mechanism is connected to the first contact and the second contact in series to control the closing or opening of the first contact and the second contact. When the first contact is disconnected When the detection element detects that the potential difference between the first contact and the second contact is less than the preset value, it means that the first contact is stuck, the relay continues to be energized, and the driving mechanism acts to disconnect the second contact, so that the relay The power-off avoids the aggravation of the adhesion caused by the continuous energization of the first contact, effectively avoids the harm caused by the adhesion, improves the safety of the battery relay, and thus improves the safety of the battery.

In some embodiments, the first contact includes a first static contact and a first movable contact that are matched, the second contact includes a second movable contact and a second static contact that are matched, and the first movable contact point and the second moving contact are connected with the driving mechanism, the first moving contact can be engaged with or disengaged from the first static contact under the action of the driving mechanism, and the second moving contact can be connected with the second moving contact under the action of the driving mechanism Two static contacts engage or disengage.

In the above solution, the driving mechanism can act on the first movable contact to make the first movable contact engage or disengage from the first static contact, and the driving mechanism can act on the second movable contact to make the second movable contact The first contact and the second contact are closed or disconnected by engaging or disengaging with the second static contact.

In some embodiments, the driving mechanism includes a first magnet, a second magnet and an electromagnetic induction armature, the first magnet is connected to the first movable contact, the second magnet is connected to the second movable contact, and the electromagnetic induction armature is used to drive the first movable contact. A magnet acts to engage the first movable contact with the first stationary contact, and drives the second magnet to act to disengage the second movable contact from the first stationary contact.

In the above solution, the electromagnetic induction armature can drive the first magnet and the second magnet to move through the magnetic force between the first magnet and the second magnet, thereby driving the first movable contact and the second magnet on the first magnet The second moving contact action on.

In some embodiments, a control circuit is provided in the electromagnetic induction armature, and the control circuit is used to control the direction of the magnetic field generated by the electromagnetic induction armature.

In the above scheme, the control circuit can make the electromagnetic induction armature generate a magnetic field, and change the magnetic field generated by the electromagnetic induction armature, so that the electromagnetic induction armature can generate force on the first magnet and the second magnet respectively.

In some embodiments, the driving mechanism further includes a first spring and a second spring, and the two ends of the first spring are respectively connected to the inner wall of the relay and the first magnet to disengage the first stationary contact from the first movable contact, The first contact can maintain a normally open state, and the two ends of the second spring are respectively connected to the inner wall of the relay and the second magnet to engage the second static contact and the second movable contact, so that the second contact can maintain a normal state. closed state.

In some embodiments, the battery relay further includes a limit mechanism, the limit mechanism includes a first limit block and a second limit block arranged on the inner wall of the relay, and the first limit block is used to limit the position of the first magnet. Displacement, the second limit block is used to limit the displacement of the second magnet.

In some embodiments, the first spring is a compression spring, the second spring is a tension spring, the first limiting block is arranged on the side of the first magnet away from the first spring, and the second limiting block is arranged on the side of the second magnet close to the first spring. side of the second spring.

In the above solution, the compression spring can hold the first magnet against the first limit block, so that the first movable contact on the first magnet is away from the first static contact; the tension spring can pull the second magnet to On the second limit block, the second movable contact on the second magnet is kept engaged with the second static contact.

In some embodiments, the battery relay further includes a first slide rail and a second slide rail arranged at intervals on the inner wall of the relay, and both the first magnet and the second magnet are slidably connected between the first slide rail and the second slide rail between.

In the above scheme, the first slide rail can make the first magnet move along the arrangement direction of the first slide rail, so that the first magnet can move along the preset direction, and the second slide rail can make the second magnet move along the second slide rail. The arrangement direction of the rail is moved so that the second magnet can move in a preset direction.

In some embodiments, the first contact includes two first static contacts, the second contact includes two second static contacts, one first static contact and one second static contact are connected in series, and the detection element uses for detecting the potential difference between another first static contact and another second static contact.

In the above solution, the detection element ensures that the detection element can detect the potential difference between the first contact and the second contact by detecting the potential difference between another first static contact and another second static contact.

In some embodiments, the battery relay further includes an alarm, and the alarm is electrically connected to the detection element.

In the above solution, the alarm can send out an alarm according to the potential difference between the first contact and the second contact detected by the detection element, so as to remind the operator of adhesion.

In the second aspect, the present application provides a relay control strategy, which is used to realize the control of the battery relay provided by any of the solutions above, and the relay control strategy includes:

energize the relay;

Judging whether the potential difference between the first contact and the second contact is greater than or equal to a preset value, if it is, it means that the relay of the battery is not stuck, otherwise it means that the relay of the battery is stuck;

When there is adhesion in the relay, the relay will alarm and the second contact will be disconnected;

When the second contact is disconnected, it is judged whether the potential difference between the first contact and the second contact is greater than or equal to a preset value, if so, the relay is maintained, and if not, personnel are evacuated.

In the above scheme, after the relay is energized, it is detected whether the potential difference between the first contact and the second contact is greater than or equal to the preset value, and whether the relay is stuck before use can be detected, and the relay sticking can be found in time. During the adhesion, the second contact is disconnected to cut off the circuit, which prevents the aggravation of the adhesion caused by the first contact being energized, and can effectively avoid the harm caused by the adhesion. When the second contact is disconnected, it is judged again whether the potential difference between the first contact and the second contact is greater than or equal to the preset value, and it is possible to find out in time whether the relay cannot be cut off, which is convenient for the operator to judge whether it is correct or not. The relay is maintained and the personnel are evacuated to ensure safety.

In some embodiments, when it is confirmed that there is no adhesion in the relay, the first contact is closed or disconnected as required, so as to ensure that the first contact is used in a non-adhesion state and ensure the use safety of the relay.

In a third aspect, the present application provides a battery, including:

multiple battery packs;

In the battery relay provided by any of the solutions above, the battery relay is used to electrically connect multiple battery packs.

In a fourth aspect, the present application also provides an electrical device, the battery provided in the above solution, and the battery is used to provide electrical energy.

The application provides a battery relay, the battery relay includes a first contact, a second contact, a detection element and a drive mechanism, the drive mechanism is connected to the first contact and the second contact in series to control The closure or disconnection of the first contact and the second contact, when the first contact is open and the detection element detects that the potential difference between the first contact and the second contact is less than the preset value, it indicates the first contact When adhesion occurs, the relay is continuously energized, and the driving mechanism acts to disconnect the second contact, so that the relay is de-energized, avoiding the aggravation of adhesion caused by the continuous energization of the first contact, and effectively avoiding the harm caused by adhesion.

The present application also provides a relay control strategy. In the relay control strategy, after the relay is energized, it is detected whether the potential difference between the first contact and the second contact is greater than or equal to a preset value, and whether the relay is stuck before use can be detected. The detection can detect the adhesion of the relay in time. When there is adhesion in the relay, the second contact is disconnected to cut off the circuit, which prevents the aggravation of the adhesion caused by the first contact due to energization, and can effectively avoid the harm caused by the adhesion. When the second contact is disconnected, it is judged again whether the potential difference between the first contact and the second contact is greater than or equal to the preset value, and it is possible to find out in time whether the relay cannot be cut off, which is convenient for the operator to judge whether it is correct or not. Relay maintenance, or evacuation of personnel, is conducive to ensuring safety.

The present application also provides a battery, which has higher safety because it includes the relay provided by the above technical solution.

The present application also provides an electric device. Since the electric device includes the battery provided by the above technical solution, the electric device has higher safety.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the application. Also throughout the drawings, the same reference numerals are used to designate the same parts. In the attached picture:

Figure 1 is a schematic structural view of a vehicle in some embodiments;

Figure 2 is a schematic structural view of a battery in some embodiments;

Fig. 3 is a schematic diagram of the internal structure of a battery relay in some embodiments;

Figure 4 is a flow diagram of a relay control strategy of some embodiments.

The reference numerals in the specific embodiment are as follows:

1-the first contact, 11-the first static contact, 12-the first moving contact;

2-the second contact, 21-the second static contact, 22-the second moving contact;

3-drive mechanism, 31-first magnet, 32-second magnet, 33-electromagnetic induction armature, 331-first control line connector, 332-second control line connector, 333-third control line connector, 34-the first One spring, 35-second spring;

41-the first limit block, 42-the second limit block;

51-the first slide rail, 52-the second slide rail;

6- detection element;

100-battery, 101-battery pack, 102-relay, 103-maintenance switch;

200-controller,

300-motor,

1000 - Vehicles.

Detailed ways

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples, rather than limiting the protection scope of the present application.

It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application shall have ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" , "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "diameter The orientation or positional relationship indicated by "to", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiment of the present application and simplifying the description, rather than indicating or implying the referred device or element Must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In addition, the technical terms "first", "second" and so on are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the embodiments of the present application, "plurality" means more than two, unless otherwise specifically defined.

In the description of the embodiments of this application, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, or It can be a detachable connection, or integrated; it can also be a mechanical connection, it can also be an electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

In the description of the embodiments of the present application, unless otherwise specified and limited, the first feature may be in direct contact with the first feature or the second feature "on" or "under" the second feature. Indirect contact through intermediaries. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, firepower, wind power and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application fields, its market demand is also constantly expanding.

The inventor noticed that because of the high voltage of the battery system, the contacts in the circuit are prone to breakdown and sparking, which makes the used relays prone to adhesion and causes serious damage to the continuous energization of the circuit.

At present, double relays are usually used to avoid the hazards caused by adhesion, or to extend the service life of the relays by improving the shape or material of the contacts. Dual relays not only cost more, but also take up a lot of space, which increases system cost and space. Although there is a solution in the prior art to forcibly break the adhesion by rubbing the contact position relative to each other, this solution, like the solution for improving the contacts, cannot prevent further aggravation of the adhesion and cannot avoid the harm caused by the adhesion.

In order to alleviate the sticking problem of the relay contacts of the battery, the applicant has found through research that additional protection can be provided for the relay by additionally setting a second contact. Specifically, on the basis of the original first contact of the relay, a second contact in series is added. When the first contact is stuck, the added second contact is disconnected to cut off the power supply of the circuit, preventing the first contact from sticking further. Intensify, avoid serious harm caused by adhesion, improve the safety of the battery relay, thereby enhancing the safety of the battery.

Based on the above considerations, in order to solve the problem of relay adhesion, the inventor has designed a battery relay after in-depth research, by additionally setting a second contact in the circuit of the battery relay, and making the second contact contact with the first The contacts are connected in series to jointly control the on-off of the relay, so that when the second contact is disconnected, the circuit of the relay is disconnected, and the relay cannot be energized.

In such a battery relay, if the first contact is stuck and the relay continues to be energized, the second contact will be disconnected, thereby de-energizing the relay, avoiding the aggravation of adhesion caused by the continued energization of the first contact, and effectively avoiding The harm caused by adhesion ensures the safety of the battery relay, thereby enhancing the safety of the battery.

When the battery relay is in use, due to the high voltage of the battery, the first contact that plays the function of daily control relay on-off is prone to breakdown and ignition, and the first contact is prone to adhesion, making the first contact The power is still on due to the presence of the sticky when the disconnect operation is performed. The second contact connected in series in the circuit is disconnected, which can disconnect the relay. When the first contact cannot normally disconnect the circuit due to adhesion, the second contact can be disconnected, so that the relay is disconnected, avoiding The adhesion of the first contact is intensified due to the continuous energization, which can effectively avoid the harm caused by the adhesion and ensure the safety of the battery relay, thereby enhancing the safety of the battery. It should be noted that the second contact may be a relay contact with the same structure as the first contact, or a relay contact with a different structure from the first contact.

The relays disclosed in the embodiments of the present application can be used, but not limited to, in electric devices such as vehicles, ships, or aircrafts. A power supply system comprising the electrical device disclosed in the present application, such as a relay and a battery, can be used. In this way, it is beneficial to avoid the aggravation of the adhesion caused by the continuous energization of the first contact, effectively avoid the harm caused by the adhesion, and improve the safety of the relay. Therefore, the safety of batteries and electrical devices can be greatly improved.

An embodiment of the present application provides an electric device using a battery as a power source. The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles; spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and more. The embodiments of the present application do not impose special limitations on the above-mentioned electrical devices.

In the following embodiments, for the convenience of description, the electric device in an embodiment of the present application is taken as an example for description.

Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. The interior of the vehicle 1000 is provided with a battery 100 , and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000 . The battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 . The vehicle 1000 may further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, for starting, navigating and running the vehicle 1000 .

In some embodiments of the present application, the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1000 .

Please refer to FIG. 2 , which is a schematic structural diagram of a battery 100 provided by some embodiments of the present application. The battery 100 includes a battery pack 101 and a relay 102 , the battery relay 102 is used to electrically connect multiple battery packs 101 , realize opening and closing of the circuit in the battery 100 , and realize charging and discharging of the battery 100 . It can be understood that there is also a maintenance switch 103 in the circuit of the battery 100, which is convenient for disconnecting the circuit during maintenance to reduce operation risks.

In the battery 100 , there may be multiple battery packs 101 , and the multiple battery packs 101 are connected in series or in parallel to meet the requirements of the battery 100 for external power supply.

Wherein, each battery pack 101 includes a plurality of battery cells, and the plurality of battery cells can be connected in series, in parallel or in combination, and the combination means that there are both series and parallel connections. The battery cell can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, but is not limited thereto. The battery cells can be in the form of cylinders, flat bodies, cuboids or other shapes.

Please refer to FIG. 3 , which is a schematic diagram of the internal structure of the battery relay 102 provided by some embodiments of the present application. The relay 102 is an electric control device, which plays the role of automatic adjustment, safety protection, conversion circuit, etc. in the circuit. The relay 102 mainly includes a contact group and a coil. The closing or opening of the contact group is controlled by controlling the incoming current in the coil, so as to realize the closing or opening of the relay 102 . The coil is wound by a cable, and the coil can generate a magnetic field after the current passes through the coil, and the action of the magnetic field and the contact group can realize the closing or disconnection of the contact group.

According to some embodiments of the present application, refer to FIG. 3 . The battery relay 102 includes a first contact 1, a second contact 2, a detection element 6 and a drive mechanism 3, the first contact 1 is a normally open contact, the second contact 2 is a normally closed contact, and the second contact 2 is a normally closed contact. The contact 2 is set in series with the first contact 1 , so that both the second contact 2 and the first contact 1 can control the on-off of the relay 102 . The detection element 6 is used to detect the potential difference between the first contact 1 and the second contact 2 to determine whether the first contact 1 and the second contact 2 are connected. The drive mechanism 3 is connected to the first contact 1 and the second contact 2, and the drive mechanism 3 is used to control the first contact 1 and the second contact 2 according to the potential difference between the first contact 1 and the second contact 2 closed or open.

Both the first contact 1 and the second contact 2 are contact groups arranged in the circuit of the relay 102, and the two are connected in series to control the disconnection of the relay 102, so that the disconnection of the first contact 1 and the second contact Opening of point 2 can make relay 102 open.

In the present application, the contact form of the first contact 1 and the second contact 2 may be a point contact. It can be understood that the contact form of the first contact 1 and the second contact 2 can also be line contact or surface contact, and those skilled in the art can make contact with the first contact 1 and the second contact 2 according to the actual situation. form to set. In addition, when the first contact 1 and the second contact 2 are closed, both the first contact 1 and the second contact 2 have contact pressure, which can not only ensure good contact of the contacts, but also make the contact resistance of the relay 102 as small as possible , but also to prevent the growth of the surface film and the contamination of the contact surface.

The normally open contact means that when the coil is not energized, the contact in the disconnected state is a normally open contact. A normally closed contact means that when the coil is not energized, the contact in the closed state is a normally closed contact.

The detection element 6 may be a voltmeter, which is used to measure the potential difference between the first contact 1 and the second contact 2, so that the first contact 1 and the second contact 2 can be measured according to the potential difference between the first contact 1 and the second contact 2 The continuity of the circuit between the first contact 1 and the second contact 2 is judged.

The driving mechanism 3 may include the coil mentioned in the foregoing solution, and use the magnetic field generated by the coil as a source of driving force to drive the first contact 1 and the second contact 2 to move. The driving mechanism 3 may also include other mechanisms capable of generating mechanical actions with insulation functions, such as hydraulic cylinders, linear motors, etc., to drive the first contact 1 and the second contact 2 to act.

Specifically, when the detection element 6 detects that the potential difference between the first contact 1 and the second contact 2 is greater than or equal to the preset value, it means that the circuit between the first contact 1 and the second contact 2 is disconnected. In the open state, since the second contact 2 is a normally closed contact, it means that the first contact 1 is disconnected, and the first contact 1 is not stuck. When the detection element 6 detects that the potential difference between the first contact 1 and the second contact 2 is less than the preset value, it means that the circuit between the first contact 1 and the second contact 2 is connected, because the second Contact 2 is a normally closed contact, which means that the first contact 1 is also closed. If the first contact 1 is not closed under the control of the drive mechanism 3, it means that the first contact 1 is stuck, and the drive mechanism 3. It can drive the second contact 2 to be disconnected to cut off the power of the relay 102, avoiding the aggravation of adhesion caused by the continuous energization of the first contact 1, and effectively avoiding the harm caused by the adhesion. In this application, the preset value is 5V, and a potential difference of 5V can effectively determine whether the circuit between the first contact 1 and the second contact 2 is in an open state. It can be understood that the preset value can also be other values, and those skilled in the art can set the specific value according to the actual situation. In some implementations of the present application, the first contact 1 includes a first static contact 11 and a first movable contact 12 that are matched, and the second contact 2 includes a second movable contact 22 and a second static contact that are matched. The contact 21, the first movable contact 12 and the second movable contact 22 are all connected to the drive mechanism 3, and the first movable contact 12 can be driven by the drive mechanism 3 to engage or disengage with the first static contact 11. Open, so as to realize the closing or breaking of the first contact 1; the second movable contact 22 can move under the drive of the driving mechanism 3 to achieve engagement or disengagement with the second static contact 21, thereby realizing the second contact 2 closed or disconnected.

The matched first static contact 11 and the first movable contact 12 form the first contact 1 and play the role of a switch as a contact group, and the matched second movable contact 22 and the second static contact 21 form the second contact. The two contacts 2 function as a contact group as a switch.

Further, it may be that the first contact 1 in this application includes two first static contacts 11 and a first movable contact 12, and the second contact 2 includes two second static contacts 21 and a second The movable contact 22, a first static contact 11 and a second static contact 21 are connected in series, the first movable contact 12 can be engaged with two first static contacts 11 at the same time, and the second movable contact 22 can be connected with the Two second static contacts 21 are engaged, and the detection element 6 is used to detect the potential difference between another first static contact 11 and another second static contact 21, to ensure that the detection range of the detection element 6 can be the first Contact 1 and second contact 2 are fully included.

In some embodiments, the first contact 1 may also include a first static contact 11 and a first movable contact 12, and the second contact 2 may include a second static contact 21 and a second movable contact. At point 22, the first movable contact 12 is connected in series with the second movable contact 22, the first movable contact 12 can be engaged with the first static contact 11, the second movable contact 22 can be engaged with the second static contact 21, The detection element 6 is used to detect the potential difference between the first static contact 11 and the second static contact 21 to ensure that the detection range of the detection element 6 can completely cover the first contact 1 and the second contact 2 . It can be understood that the first contact 1 and the second contact 2 can also have other structural forms, as long as the detection range of the detection element 6 can completely cover the first contact 1 and the second contact 2 .

In some embodiments, the driving mechanism 3 includes a first magnet 31, a second magnet 32 and an electromagnetic induction armature 33, the first magnet 31 is connected with the first movable contact 12, and the second magnet 32 is connected with the second movable contact 22 , the electromagnetic induction armature 33 drives the first magnet 31 to move through the electromagnetic force generated between the first magnet 31 and the second magnet 32 so that the first movable contact 12 is engaged with the first static contact 11 and drives the second magnet 32 Action to disengage the second movable contact 22 from the first static contact 11 .

The electromagnetic induction armature 33 here plays the role of the coil in the above scheme to generate a magnetic field, and acts on the first magnet 31 and the second magnet 32 to drive the first magnet 31 and the second magnet 32 to move, so that the first movable contact 12 And the second movable contact 22 moves accordingly.

In some embodiments, a control circuit is provided in the electromagnetic induction armature 33, and the control circuit is used to control the magnetic field generated by the electromagnetic induction armature 33, so that the electromagnetic force between the electromagnetic induction armature 33 and the first magnet 31 can drive the first magnet 31 when necessary. A magnet 31 acts to engage the first movable contact 12 with the first static contact 11, so as to close the first contact 1, and also enables the electromagnetic force between the electromagnetic induction armature 33 and the second magnet 32 to be able to The second magnet 32 is driven to disengage the second movable contact 22 from the second stationary contact 21 to disconnect the second contact 2 . The control circuit can be a cable wound on the outer peripheral surface of the main body of the electromagnetic induction armature 33 , and the electromagnetic induction armature 33 can generate a magnetic field when a current flows through the cable.

Specifically, the control circuit includes a first control line joint 331, a second control line joint 332 and a third control line joint 333. The first control line joint 331 and the second control line joint 332 are wound around the outer peripheral surface of the electromagnetic induction armature 33 The cable connection on the cable connection, the second control line connector 332 and the third control line connector 333 are connected by cables wound on the outer peripheral surface of the electromagnetic induction armature 33, the first control line connector 331 and the second control line connector 332 are used for Control the interaction between the electromagnetic induction armature 33 and the first magnet 31 to control the action of the first contact 1, the second control line connector 332 and the third control line connector 333 are used to control the electromagnetic induction armature 33 and the second magnet 32 Between the role to control the action of the second contact 2.

In some embodiments, the battery relay 102 also includes a controller, the controller is electrically connected with the control circuit of the drive mechanism 3 and the detection element 6, and when the first contact 1 is not closed under the drive of the drive mechanism 3 and the potential difference is less than When the preset value is set, it means that the first contact 1 is stuck, and the controller controls the driving mechanism 3 to disconnect the second contact 2, so that the relay 102 is de-energized, which avoids the aggravation of the sticking caused by the continuous energization of the first contact 1 , effectively avoiding the harm caused by adhesion.

In this embodiment, the controller can be a centralized or distributed controller. For example, the controller can be a single single-chip microcomputer, or it can be composed of distributed multi-block single-chip microcomputers. The control program can be run in the single-chip microcomputer, and then control the drive. Mechanism 3 and detection element 6 realize their functions.

In some embodiments, the driving mechanism 3 further includes a first spring 34 and a second spring 35, and the two ends of the first spring 34 are respectively connected to the inner wall of the relay 102 and the first magnet 31 so that the first stationary contact 11 and the second A movable contact 12 is kept disengaged under normal conditions, so that the first contact 1 is a normally open contact. The two ends of the second spring 35 are respectively connected to the inner wall of the relay 102 and the second magnet 32 to keep the second static contact 21 and the second movable contact 22 engaged under normal conditions, so that the second contact 2 is Normally closed contact.

The relay 102 of the battery also includes a limit mechanism, the limit mechanism includes a first limit block 41 and a second limit block 42 arranged on the inner wall of the relay 102, the first limit block 41 is used to limit the first magnet 31 displacement, so that the first magnet 31 can be within the magnetic field range of the electromagnetic induction armature 33; .

Both the first limiting block 41 and the second limiting block 42 are parts that play a limiting role. The first limiting block 41 and the second limiting block 42 are arranged on the inner wall of the relay 102. The first limiting block 41 can The displacement of the first magnet 31 is blocked to limit the position of the first magnet 31 , and the second limit block 42 can block the displacement of the second magnet 32 to realize the limit of the second magnet 32 .

It can be understood that the limiting mechanism may also include a first limiting protrusion and a second limiting protrusion arranged on the inner wall of the relay 102, and the displacement of the first magnet 31 is blocked by the first limiting protrusion to achieve The position limiting of the first magnet 31 ensures that the first magnet 31 can be within the magnetic field range of the electromagnetic induction armature 33; the displacement of the second magnet 32 is blocked by the second position limiting protrusion to realize the position limiting of the second magnet 32, This ensures that the second magnet 32 can be within the magnetic field range of the electromagnetic induction armature 33 .

Specifically, the first spring 34 is a compression spring, and the first limiting block 41 is arranged on the side of the first magnet 31 away from the first spring 34. Under normal conditions, the compression spring can hold the first magnet 31 against the first limiting block. 41 , the first movable contact 12 on the first magnet 31 is kept away from the first stationary contact 11 . The second spring 35 is an extension spring, and the second limiting block 42 is arranged on the side of the second magnet 32 close to the second spring 35, and the extension spring can pull the second magnet 32 onto the second limiting block 42, so that The second movable contact 22 on the second magnet 32 is kept in engagement with the second stationary contact 21 .

Compression spring refers to a helical spring that bears axial pressure. The cross-section of the material it uses is mostly circular. There is a certain gap between the rings of the compression spring. The spring can hold the first magnet 31 against the first limiting block 41 . Tension spring refers to a helical spring that bears axial tension. Tension springs are generally made of circular cross-section materials. When not under load, the coils of the tension spring are generally tight and there is no gap. When the external load is applied, the spring is elongated and deformed, and the deformation energy is stored, so that the tension spring can pull the second magnet 35 to the first limit block 41 .

By setting the compression spring, the first contact 1 maintains a normally open state under normal conditions, that is, the first contact 1 is a normally open contact. By setting the tension spring, the first contact 1 maintains a normally closed state under normal conditions, that is, the second contact 2 is a normally closed contact.

In some embodiments, the battery relay 102 further includes a first slide rail 51 and a second slide rail 52 arranged in parallel on the inner wall of the relay 102, and the first magnet 31 and the second magnet 32 are both slidably connected to the first slide rail. Between the rail 51 and the second slide rail 52 , the first magnet 31 and the second magnet 32 are moved along the arrangement direction of the first slide rail 51 and the second slide rail 52 . Specifically, the first slide rail 51 and the second slide rail 52 are arranged parallel to the extending direction of the center line of the electromagnetic induction armature 33, which not only facilitates the setting of the first slide rail 51 and the second slide rail 52, but also makes the first magnet 31 and the second magnet 32 can move along a preset direction.

The first slide rail 51 and the second slide rail 52 can be the tracks formed by slotting on the inner wall of the relay 102, the first magnet 31 and the second magnet 32 are provided with sliding parts, and the sliding parts of the first magnet 31 are clearance fit In the first slide rail 51, the sliding connection between the first magnet 31 and the first slide rail 51 is realized, and the sliding part of the second magnet 32 is clearance-fitted in the second slide rail 52, so that the second magnet 32 and the second slide rail 52 slip connections. The first slide rail 51 and the second slide rail 52 can also be track-shaped protrusions provided on the inner wall of the relay 102, and the first magnet 31 and the second magnet 32 are provided with slide grooves, and the first slide rail 51 is loosely fitted in the In the sliding groove of the first magnet 31, the sliding connection between the first magnet 31 and the first sliding rail 51 is realized, and the second sliding rail 52 is gap-fitted in the sliding groove of the second magnet 32 to realize the connection between the second magnet 32 and the second sliding rail. The sliding connection of the rails 52 forms a track.

In some embodiments, the battery relay 102 further includes an alarm, which is electrically connected to the detection element 6 or the controller, and the alarm can send out an alarm signal when the first contact 1 is stuck. The alarm signal is a signal that can attract the attention of the operator and surrounding personnel, so that the operator and surrounding personnel can quickly realize the adhesion of the first contact 1 after receiving the alarm signal, so that the operator and surrounding personnel can take corresponding measures in time.

The alarm signal can be a sound signal or a light signal, and the alarm signal can make the operator know in time that the relay 102 is stuck, so as to take countermeasures such as maintenance in time. That is to say, the siren can be an audible siren or a light siren,

According to some embodiments of the present application, the present application also provides a relay control strategy, which is used to realize the control of the battery relay 102 provided by the above solution, as shown in FIG. 4 , the relay control strategy includes:

energize the relay 102;

That is, after the relay 102 is installed in the circuit, the circuit where the relay 102 is located is energized. It can be understood that the relay 102 here is a disconnected relay 102;

Judging whether the potential difference between the first contact 1 and the second contact 2 is greater than or equal to a preset value, if so, it means that the relay 102 of the battery has no adhesion, otherwise, it means that the relay 102 of the battery has adhesion;

That is to say, whether the potential difference between the first contact 1 and the second contact 2 measured by the detection element 6 is greater than or equal to the preset value, if the potential difference between the first contact 1 and the second contact 2 greater than or equal to the preset value, it means that the first contact 1 and the second contact 2 are disconnected, and the relay 102 of the battery has no adhesion; if the potential difference between the first contact 1 and the second contact 2 is less than the preset If the value is set, it means that there is communication between the first contact 1 and the second contact 2, and it means that the first contact 1, which should be kept normally open, is closed, that is to say, the first contact 1 is stuck;

When there is adhesion in the relay 102, the relay 102 gives an alarm and the second contact 2 is disconnected;

That is to say, when the relay 102 is stuck, the relay 102 sends out an alarm, and the driving mechanism 3 drives the second contact 2 to disconnect, cut off the circuit of the relay 102, prevent the relay 102 from continuing to be energized, and avoid the first contact 1 from continuing to be energized. The resulting adhesion is intensified, effectively avoiding the harm caused by adhesion;

When the second contact 2 is disconnected, it is judged whether the potential difference between the first contact 1 and the second contact 2 is greater than or equal to a preset value, if so, the relay 102 is maintained, and if not, personnel are evacuated;

That is to say, when the second contact 2 is disconnected, it is judged whether the potential difference between the first contact 1 and the second contact 2 is greater than or equal to the preset value, and if the potential difference is greater than or equal to the preset value, it means that the Opening the second contact 2 realizes the disconnection of the relay 102 , and the operator can perform maintenance and other operations on the battery relay 102 to eliminate the adhesion in the first contact 1 in the battery relay 102 . If the potential difference is less than the preset value, it means that even if the second contact 2 is disconnected, the disconnection of the relay 102 cannot be realized, and the relay 102 of the battery fails, and the surrounding personnel should be evacuated in time to avoid danger;

After the relay 102 is energized, it is detected whether the potential difference between the first contact 1 and the second contact 2 is greater than or equal to the preset value. Whether the relay 102 is stuck before use can be detected in time, and the relay 102 can be found in time. When there is adhesion, the second contact 2 is disconnected, which cuts off the circuit, prevents the first contact 1 from increasing the adhesion caused by continuous energization, and can effectively avoid the harm caused by the adhesion. And when the second contact 2 is disconnected, it is judged again whether the potential difference between the first contact 1 and the second contact 2 is greater than or equal to the preset value, and whether the fault that cannot be cut off occurs in the relay 102 can be checked in time, which is convenient for operation Personnel judge whether to maintain the relay 102 or evacuate the personnel, which is conducive to ensuring the safety of the relay 102;

When it is confirmed that the relay 102 has no adhesion, then close or disconnect the first contact 1 as required, so as to ensure that the first contact 1 is used in a non-adhesion state and ensure the use safety of the relay 102;

That is to say, when the potential difference between the first contact 1 and the second contact 2 is greater than or equal to the preset value, whether to close the first contact 1 according to the need, and if it is necessary to close the first contact 1, then close the second contact. One contact 1, after the relay 102 is used after power-on, the first contact 1 is disconnected, so that the relay 102 enters the next cycle of the relay control strategy. If the first contact 1 does not need to be closed, the first contact 1 remains open without action.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. All of them should be covered by the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A battery relay (102), comprising:

a first contact (1), the first contact (1) being a normally open contact;

a second contact (2), the second contact (2) is connected in series with the first contact (1), and the second contact (2) is a normally closed contact;

a detection element (6), used to detect the potential difference between the first contact (1) and the second contact (2);

A driving mechanism (3), connected to the first contact (1) and the second contact (2), the driving mechanism (3) is used to control the first contact (1) according to the potential difference ) and the second contact (2) are closed or open.
The battery relay (102) according to claim 1, wherein the first contact (1) includes a first stationary contact (11) and a first moving contact (12) that are matched, and the first The two contacts (2) include a second movable contact (22) and a second static contact (21) that are matched, and the first movable contact (12) and the second movable contact (22) are both Connected with the drive mechanism (3), the first movable contact (12) can be engaged or disengaged from the first static contact (11) under the action of the drive mechanism (3), the The second movable contact (22) can engage or disengage from the second stationary contact (21) under the action of the driving mechanism (3).
The battery relay (102) according to claim 2, wherein the driving mechanism (3) includes a first magnet (31), a second magnet (32) and an electromagnetic induction armature (33), and the first magnet (31) is connected with the first movable contact (12), the second magnet (32) is connected with the second movable contact (22), and the electromagnetic induction armature (33) is used to drive the The first magnet (31) acts to make the first movable contact (12) engage with the first static contact (11), drives the second magnet (32) to make the second movable contact Point (22) is disengaged from said first stationary contact (11).
The battery relay (102) according to claim 3, wherein a control circuit is provided in the electromagnetic induction armature (33), and the control circuit is used to control the magnetic field generated by the electromagnetic induction armature (33).
The battery relay (102) according to claim 3, wherein the driving mechanism (3) further comprises a first spring (34) and a second spring (35), and the two ends of the first spring (34) respectively connected to the inner wall of the relay (102) and the first magnet (31), so that the first static contact (11) and the first movable contact (12) are disengaged, and the second spring The two ends of (35) are respectively connected to the inner wall of the relay (102) and the second magnet (32), so that the second static contact (21) and the second movable contact (22) join.
The battery relay (102) according to claim 5, wherein the battery relay (102) further includes a limit mechanism, and the limit mechanism includes a first set on the inner wall of the relay (102). A limit block (41) and a second limit block (42), the first limit block (41) is used to limit the displacement of the first magnet (31), and the second limit block (42) Used to limit the displacement of the second magnet (32).
The battery relay (102) according to claim 6, wherein the first spring (34) is a compression spring, the second spring (35) is a tension spring, and the first limit block (41 ) is arranged on the side of the first magnet (31) away from the first spring (34), and the second limiting block (42) is arranged on the second magnet (32) close to the second spring (35) side.
The battery relay (102) according to claim 2, wherein the first contact (1) includes two first static contacts (11), and the second contact (2) includes two One of the second static contacts (21), one of the first static contacts (11) and one of the second static contacts (21) are connected in series, and the detection element (6) is used to detect the other The potential difference between the first static contact (11) and another second static contact (21).
The battery relay (102) according to claim 3, wherein the battery relay (102) further comprises a first slide rail (51) and a second slide rail ( 52), the first magnet (31) and the second magnet (32) are both slidably connected between the first slide rail (51) and the second slide rail (52).
The battery relay (102) according to claim 1, wherein the battery relay (102) further comprises an alarm, and the alarm is electrically connected to the detection element (6).
A relay control strategy, wherein, for realizing the control of the relay (102) of the battery according to any one of claims 1-10, the relay control strategy comprises:

Energize the relay (102);

Judging whether the potential difference between the first contact (1) and the second contact (2) is greater than or equal to a preset value, if so, it means that the battery relay (102) has no adhesion; otherwise, it means that the battery There is adhesion in the relay (102);

When there is adhesion in the relay (102), the second contact (2) is disconnected;

When the second contact (2) is disconnected, it is judged whether the potential difference between the first contact (1) and the second contact (2) is greater than or equal to the preset value, if so, Perform maintenance on the relay (102), if not, perform personnel evacuation.
The relay control strategy according to claim 11, wherein, when the relay (102) has no adhesion, if there is a demand to close the relay (102), the first contact (1) is closed, and if there is no If the relay (102) is closed, the first contact (1) does not act.
A battery (100), comprising:

a plurality of battery packs (101);

The battery relay (102) according to any one of claims 1-10, wherein the battery relay (102) is used to electrically connect a plurality of battery packs.
An electrical device, comprising the battery (100) as claimed in claim 13, the battery (100) being used to provide electrical energy.