Relay residual life monitoring device and battery device with same

Abstract

The utility model discloses a relay residual life monitoring device and a battery device with the same. The device comprises an acquisition trigger circuit, a signal acquisition circuit and a processing circuit, the acquisition trigger circuit is configured to output a first trigger acquisition signal and a second trigger acquisition signal; the signal acquisition circuit is connected to the acquisition trigger circuit and the relay, and acquires a sound signal sent by the relay when receiving the first trigger acquisition signal; when the second trigger acquisition signal is received, an acoustic signal sent by the relay and an electric signal of the relay are acquired, and the electric signal comprises a voltage signal and a current signal; and the processing circuit is connected to the signal acquisition circuit, analyzes the residual life of the relay based on the acoustic signal when receiving the acoustic signal, and analyzes the residual life of the relay based on the acoustic signal and the electric signal when receiving the acoustic signal and the electric signal. According to the scheme, corresponding signals can be collected according to needs, the flexibility of signal collection is improved, and then the accuracy of service life monitoring is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric appliance detection, in particular to a relay residual life monitoring device and a battery device with the same. BACKGROUND

[0002] The relay is widely used in energy storage systems. The relay is an electronic control device that can control a larger current or voltage switching device through a smaller current or voltage, and is used to control the on-off of a large current circuit in an energy storage system. However, due to long-term operation and frequent switching operations, faults may occur inside the relay, such as arc generation during large current breaking, contact resistance heating, etc. These phenomena may melt the contact, causing the mechanical moving parts and the contact inside the relay to degrade, affecting the effect of the relay, and thus causing faults and even system collapse. Therefore, it is particularly important to monitor the life of the relay.

[0003] When monitoring the life of the relay, the signals collected are usually fixed. However, different signals may need to be collected for life monitoring corresponding to different working states of the relay. If fixed signals are always collected for life monitoring, the accuracy of life monitoring may be affected. CONTENT OF THE UTILITY MODEL

[0004] The present application at least provides a relay residual life monitoring device and a battery device with the same, to improve the accuracy of relay life monitoring.

[0005] The first aspect of the present application provides a relay residual life monitoring device, comprising a collection trigger circuit, a signal collection circuit and a processing circuit; the collection trigger circuit is configured to output a first trigger collection signal and a second trigger collection signal; the signal collection circuit is connected to the collection trigger circuit and is configured to collect a sound signal emitted by the relay when receiving the first trigger collection signal; the signal collection circuit is also connected to the relay and is configured to collect the sound signal emitted by the relay and an electric signal of the relay when receiving the second trigger collection signal, and the electric signal includes at least one of a voltage signal and a current signal; the processing circuit is connected to the signal collection circuit and is configured to analyze the residual life of the relay based on the sound signal when receiving the sound signal, and analyze the residual life of the relay based on the sound signal and the electric signal when receiving the sound signal and the electric signal.

[0006] The scheme has the advantages that the acquisition trigger circuit is arranged, and the acquisition trigger circuit is configured to output different acquisition signals, namely a first trigger acquisition signal and a second trigger acquisition signal, when the relay is in different working states; the signal acquisition circuit acquires the sound signal emitted by the relay when the first trigger acquisition signal is received, and acquires the sound signal and the electric signal of the relay when the second trigger acquisition signal is received, so that corresponding signals can be acquired as required, the flexibility of signal acquisition is improved, and the accuracy of life monitoring is improved.

[0007] In some embodiments, the acquisition trigger circuit comprises a first coil voltage detection unit and a trigger signal output unit; the first coil voltage detection unit is configured to detect the coil voltage in the relay, and output a second trigger control signal when the coil voltage is greater than a first preset threshold; and the trigger signal output unit is connected to the first coil voltage detection unit and the signal acquisition circuit, and is configured to output the second trigger acquisition signal to make the signal acquisition circuit acquire the sound signal and the electric signal of the relay when the second trigger control signal is received.

[0008] In some embodiments, the signal acquisition circuit comprises an electric signal detection module connected to the coil and / or the contact of the relay and connected to the acquisition trigger circuit, and configured to detect the coil electric signal and / or the contact electric signal of the relay, and output the first trigger control signal to the acquisition trigger circuit to make the acquisition trigger circuit output the first trigger acquisition signal when the coil electric signal and / or the contact electric signal meets a preset condition.

[0009] The scheme has the advantages that the electric signal detection module detects the electric signal of the relay, and the signal acquisition circuit acquires the sound signal when the electric signal of the relay meets a preset condition, so that the flexibility of signal acquisition is improved.

[0010] In some embodiments, the signal acquisition circuit further comprises a sound signal detection module and a signal acquisition module; the sound signal detection module is configured to detect the sound signal emitted by the relay; the signal acquisition module is connected to the acquisition trigger circuit, the sound signal detection module and the electric signal detection module, and is configured to acquire the sound signal emitted by the relay when the first trigger acquisition signal or the second trigger acquisition signal is received, and further acquire the coil electric signal and / or the contact electric signal of the relay when the second trigger acquisition signal is received.

[0011] The scheme has the advantages that the electric signal detection module detects the electric signal of the relay, and the signal acquisition circuit acquires the sound signal when the electric signal of the relay meets a preset condition, so that the flexibility of signal acquisition is improved.

[0012] In some embodiments, the acoustic signal detection module comprises an acoustic sensor configured to detect the acoustic signal emitted by the relay, and a signal amplifier connected to the acoustic sensor and configured to amplify the acoustic signal output by the acoustic sensor.

[0013] The above scheme improves the accuracy of acoustic signal acquisition by amplifying the acoustic signal output by the acoustic sensor through the signal amplifier, thereby improving the accuracy of the service life monitoring based on the acoustic signal.

[0014] In some embodiments, the electric signal detection module comprises a second coil voltage detection unit electrically connected to the coil in the relay and configured to detect the voltage of the coil in the relay, and a coil current detection unit electrically connected to the coil in the relay and configured to detect the current of the coil in the relay.

[0015] The above scheme is advantageous for accurately measuring the coil electric signal when the relay is closed and opened, and provides comprehensive data for subsequent signal analysis.

[0016] In some embodiments, the electric signal detection module comprises a contact voltage detection unit electrically connected to the contact in the relay and configured to detect the voltage of the contact in the relay, and a contact current detection unit electrically connected to the contact in the relay and configured to detect the current of the contact in the relay.

[0017] The above scheme is advantageous for accurately measuring the contact electric signal when the relay is closed and opened, and provides comprehensive data for subsequent signal analysis.

[0018] In some embodiments, the device further comprises a warning output module connected to the processing circuit, and the warning output module is configured to output a warning information when the remaining service life of the relay is less than the remaining service life threshold.

[0019] In some embodiments, the device further comprises a human-computer interaction module connected to the processing circuit, and the human-computer interaction module is configured to receive and display the remaining service life output by the processing circuit.

[0020] The second aspect of the present application provides a battery device comprising a battery pack and a relay coupled to each other, and the relay remaining service life monitoring device of the above-mentioned first aspect, and the relay remaining service life monitoring device is electrically connected to the battery pack.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, but not limiting the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings incorporated in and forming a part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0023] Figure 1 is a frame diagram of a relay residual life monitoring device according to an embodiment of the present application;

[0024] Figure 2 is a frame diagram of a relay residual life monitoring device according to another embodiment of the present application;

[0025] Figure 3 is a structure diagram of a trigger circuit according to an embodiment of the relay residual life monitoring device of the present application;

[0026] Figure 4 is a frame diagram of a relay residual life monitoring device according to still another embodiment of the present application;

[0027] Figure 5 is a frame diagram of a relay residual life monitoring device according to yet another embodiment of the present application;

[0028] Figure 6 is a frame diagram of a warning output module according to an embodiment of the present application;

[0029] Figure 7 is a frame diagram of a battery device according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The scheme of the embodiments of the present application will be described in detail below in conjunction with the drawings of the specification.

[0031] In the following description, for the purpose of explanation and not limitation, specific details are set forth, such as particular system configurations, interfaces, techniques, in order to provide a thorough understanding of the present application.

[0032] The term "and / or" herein is merely an associated relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects. In addition, "multiple" herein means two or more than two. In addition, the term "at least one" herein means any one of multiple or any combination of at least two of multiple, for example, including at least one of A, B and C can mean including any one or more elements selected from the set consisting of A, B and C.

[0033] Please refer to Figure 1The first aspect of the present application provides a relay residual life monitoring device 100, comprising a collection trigger circuit 110, a signal collection circuit 120 and a processing circuit 130; the collection trigger circuit 110 is configured to output a first trigger collection signal and a second trigger collection signal; the signal collection circuit 120 is connected to the collection trigger circuit 110 and is configured to collect the sound signal emitted by the relay when receiving the first trigger collection signal; the signal collection circuit 120 is also connected to the relay and is configured to collect the sound signal emitted by the relay and the electrical signal of the relay when receiving the second trigger collection signal, and the electrical signal includes at least one of a voltage signal and a current signal; the processing circuit 130 is connected to the signal collection circuit 120 and is configured to analyze the residual life of the relay based on the sound signal when receiving the sound signal, and analyze the residual life of the relay based on the sound signal and the electrical signal when receiving the sound signal and the electrical signal.

[0034] The above scheme, by setting the collection trigger circuit 110, and the collection trigger circuit 110 is configured to output different collection signals when the relay is in different working states, that is, output the first trigger collection signal and the second trigger collection signal, the signal collection circuit 120 collects the sound signal emitted by the relay when receiving the first trigger collection signal, and collects the sound signal and the electrical signal of the relay when receiving the second trigger collection signal, so that the corresponding signal can be collected as needed, improve the flexibility of signal collection, and improve the accuracy of life monitoring.

[0035] In addition, through the relay residual life monitoring device provided by the present application, the signal collection circuit can be connected with the relay, for example, the electrical signal detection probe can be electrically connected with the coil and the contact of the relay to detect the electrical signal of the relay, and the sound sensor can be built-in in the relay to detect the sound signal of the relay, so as to realize signal collection, and without disassembling the relay, online measurement and analysis of the relay can be realized.

[0036] Exemplarily, the sound signal emitted by the relay can include the sound signal emitted by the relay during the attraction process, for example, the sound of the moving contact and the static contact in contact during the attraction process of the relay, the sound of the iron core collision, so as to obtain the attraction time, the overtravel time and other parameters in the attraction process of the relay according to the sound signal; the sound signal emitted by the relay can also include the sound signal emitted by the relay during the breaking process, for example, the sound of the bracket hitting the yoke plate during the breaking process of the relay, so as to obtain the release time, the breaking open distance travel time and other parameters in the breaking process of the relay according to the sound signal.

[0037] It should be noted that the mechanical performance degradation of the relay will affect both the contact attraction process and the contact breaking process. Since the contact action of the relay includes both the contact attraction process and the contact breaking process, and both processes generate sound, the mechanical performance degradation can be obtained by analyzing the sound signals of the two processes. Since the contact attraction is affected by the roughness and local protrusions of the contact surface, the sound signals of the contact attraction process can also be used to obtain parameters representing the contact electrical wear state.

[0038] The above scheme can realize non-contact performance evaluation of the relay by collecting the sound signals generated by the relay to obtain the performance of the relay, thereby alleviating the problem that the performance evaluation of the relay needs to be disassembled.

[0039] In some embodiments, referring to Figure 2 The trigger circuit 110 includes a first coil voltage detection unit 111 and a trigger signal output unit 112. The first coil voltage detection unit 111 is configured to detect the coil voltage in the relay and output a second trigger control signal when the coil voltage is greater than a first preset threshold. The trigger signal output unit 112 is connected to the first coil voltage detection unit 111 and the signal collection circuit 120. The trigger signal output unit 112 is configured to output a second trigger collection signal when the second trigger control signal is received, so that the signal collection circuit 120 collects the sound signals and the electrical signals of the relay.

[0040] For example, when the coil voltage is greater than the first preset threshold, the relay contact will be attracted. The size of the first preset threshold can be set according to actual conditions, for example, the first preset threshold can be determined according to the driving voltage of the relay, etc. The size of the first preset threshold is not limited in the present application.

[0041] In some embodiments, referring to Figure 3 The first coil voltage detection unit 111 can include several voltage sensors, for example, a first voltage sensor 1111 and a second voltage sensor 1112. Since the driving voltages of different specifications of relays are different, using a single range sensor to detect the coil voltage may not be suitable for different specifications of relays. The first voltage sensor 1111 and the second voltage sensor 1112 can have different ranges, so as to be suitable for different specifications of relays. For example, the first voltage sensor 1111 and the second voltage sensor 1112 can be voltage sensors with voltage ranges of 12V and 24V, respectively. Other range voltage sensors can also be provided in the first coil voltage detection unit 111. The number and range of the voltage sensors can be selected according to actual needs, and the number and range of the voltage sensors are not limited in the present application.

[0042] The first voltage sensor 1111 and the second voltage sensor 1112 can also be connected to the trigger signal output unit 112 through an OR gate (for example Figure 3 The first diode D1 and the second diode D2 in the OR gate can output a second trigger control signal to the trigger signal output unit 112 when the first voltage sensor 1111 or the second voltage sensor 1112 detects that the coil voltage exceeds the first preset threshold.

[0043] Exemplarily, the trigger signal output unit 112 can be a solid-state relay. The solid-state relay is powered by a +5V voltage and is connected to the signal acquisition circuit 120 and the first coil voltage detection unit 111. When the first coil voltage detection unit 111 detects that the coil voltage exceeds the first preset threshold, the solid-state relay outputs a second trigger acquisition signal to the signal acquisition circuit 120.

[0044] The trigger signal output unit 112 can also include other circuit elements, as long as it can output a second trigger acquisition signal under the excitation of the second trigger control signal output by the first coil voltage detection unit 111. For example, a controllable semiconductor transistor such as MOSFET can be used, which is turned on to output the power supply voltage as the second trigger acquisition signal when the second trigger control signal is received. The specific circuit structure of the trigger signal output unit 112 is not limited in the present application.

[0045] In some embodiments, please refer to Figure 4 The signal acquisition circuit 120 can include an electrical signal detection module 121 connected to the coil and / or the contact of the relay and connected to the acquisition trigger circuit 110, configured to detect the coil electrical signal and / or the contact electrical signal of the relay, and output a first trigger control signal to the acquisition trigger circuit 110 when the coil electrical signal and / or the contact electrical signal meets a preset condition, so that the acquisition trigger circuit 110 outputs a first trigger acquisition signal.

[0046] The relay includes a contact system and an electromagnetic mechanism (such as a coil), wherein the contact system is the direct execution mechanism of the relay, and the closing of the moving contact and the static contact controls the conduction and breaking of the circuit. Under the action of high temperature or arc, the contact is prone to welding, which causes the relay to be unable to reliably cut off the circuit. The life can be predicted by the contact resistance, contact pressure and other parameters of the contact. Moreover, the inventors of the present application have found that in the frequent operation of the relay, due to the influence of high temperature or arc, the contact material is prone to transfer or loss, and the internal sealed cavity will also affect the working performance of the relay due to the spattering or high temperature of the contact material.

[0047] Therefore, the relay residual life monitoring device 100 can obtain the contact resistance, the arc energy, the arc time and the like of the relay by obtaining the electrical signal related to the coil and / or the contact in the relay.

[0048] Exemplarily, the arc time can be obtained by obtaining the contact current and / or the contact voltage. The arc time is the time interval from the arc-on time to the arc-off time. When the moving contact and the static contact are broken and the arc occurs, the contact current and the contact voltage will appear a series of changes. When the relay is under load breaking, due to the existence of the arc, the contact current does not immediately drop to 0, but gradually decreases during the arc duration; the contact voltage also has a corresponding change process. Therefore, the arc time can be determined according to the contact current and / or the contact voltage.

[0049] For example, the arc-on time can be the time when the contact current begins to decrease, and the arc-off time can be the time when the contact current just drops to 0. Therefore, the electrical signal detection module 121 can be configured to be connected to the contact of the relay to detect the contact current, and the preset condition can include that the contact current is less than a first contact current value and the contact current is not greater than a second contact current value. The first contact current value can be the current value when the contact is in a stable attraction state; and the second contact current value can be 0.

[0050] For another example, the arc-on time can be the time when the contact voltage begins to rise, and the arc-off time can be the time when the contact voltage begins to stabilize. Therefore, the electrical signal detection module 121 can be configured to be connected to the contact of the relay to detect the contact current and the contact voltage.

[0051] For another example, the arc-on time can be the time when the contact current begins to decrease and the contact voltage begins to rise, and the arc-off time can be the time when the contact current just drops to 0 and the contact voltage begins to stabilize. Therefore, the electrical signal detection module 121 can be configured to be connected to the contact of the relay to detect the contact current and the contact voltage.

[0052] The electrical signal detection module 121 can also be connected to the coil of the relay to detect the coil electrical signal, such as the coil voltage and the coil current. When the coil voltage and the coil current meet the preset condition, the first trigger control signal is output to the signal acquisition circuit 120 to make the signal acquisition circuit 120 acquire the sound signal.

[0053] The preset condition can be set according to actual needs, for example, it can be set that the contact current exceeds a certain preset value, or the contact voltage exceeds a certain preset value, and the like. The preset condition is not limited in the present application.

[0054] The scheme detects the electric signal of the relay through the electric signal detection module 121, and makes the signal acquisition circuit 120 acquire the sound signal when the electric signal of the relay meets the preset condition, thereby improving the flexibility of signal acquisition.

[0055] In some embodiments, please continue to refer to Figure 4 The signal acquisition circuit 120 can further include a sound signal detection module 122 and a signal acquisition module 123. The sound signal detection module 122 is configured to detect the sound signal emitted by the relay. The signal acquisition module 123 is connected to the acquisition trigger circuit 110, the sound signal detection module 122, and the electric signal detection module 121. The signal acquisition module 123 is configured to acquire the sound signal emitted by the relay when receiving the first trigger acquisition signal or the second trigger acquisition signal, and further acquire the coil electric signal and / or the contact electric signal of the relay when receiving the second trigger acquisition signal.

[0056] The signal acquisition module 123 can include a synchronous high-speed multifunctional data acquisition card, which realizes data interaction with the processing circuit 130 through a high-speed network port, completes synchronous high-speed acquisition of the electric signal and the sound signal, and relieves the influence of asynchronous and low-speed sampling on the time synchronization of the high-frequency sound signal impact characteristics and the electric signal.

[0057] The scheme detects the electric signal of the relay through the electric signal detection module 121, and makes the signal acquisition circuit 120 acquire the sound signal when the electric signal of the relay meets the preset condition, thereby improving the flexibility of signal acquisition.

[0058] In some embodiments, please refer to Figure 5 The sound signal detection module 122 includes a sound sensor 1221 and a signal amplifier 1222. The sound sensor 1221 is configured to detect the sound signal emitted by the relay. The signal amplifier 1222 is connected to the sound sensor 1221 and amplifies the sound signal output by the sound sensor 1221.

[0059] The sound sensor 1221 can include a preamplifier and a microphone.

[0060] The scheme amplifies the sound signal output by the sound sensor 1221 through the signal amplifier 1222, thereby improving the accuracy of sound signal acquisition and further improving the accuracy of life monitoring based on the sound signal.

[0061] In some embodiments, please continue to refer to Figure 5The electric signal detection module 121 can include a second coil voltage detection unit 1211 and a coil current detection unit 1212. The second coil voltage detection unit 1211 is electrically connected to the coil in the relay and is configured to detect the voltage of the coil in the relay. The coil current detection unit 1212 is electrically connected to the coil in the relay and is configured to detect the current of the coil in the relay.

[0062] In some embodiments, the coil current and the contact current can be collected by current clamps, and the contact voltage and the coil voltage can be collected by a high-voltage differential probe and a normal voltage probe, respectively.

[0063] In some embodiments, the second coil voltage detection unit 1211, the coil current detection unit 1212, the contact current detection unit 1213, the contact voltage detection unit 1214, and the acoustic signal detection module 122 can be connected to the signal collection module 123 through a BNC-to-SMA cable, so as to transmit the detected voltage, current, and acoustic signals to the signal collection module 123.

[0064] In some embodiments, please continue to refer to Figure 5 The electric signal detection module 121 includes a contact voltage detection unit 1214 and a contact current detection unit 1213. The contact voltage detection unit 1214 is electrically connected to the contact in the relay and is configured to detect the voltage of the contact in the relay. The contact current detection unit 1213 is electrically connected to the contact in the relay and is configured to detect the current of the contact in the relay.

[0065] In some embodiments, please continue to refer to Figure 5 The device further includes a pre-warning output module 150 connected to the processing circuit 130. The pre-warning output module 150 is configured to output a pre-warning information when the remaining life of the relay is less than the remaining life threshold.

[0066] In some embodiments, please continue to refer to Figure 5 The device further includes a human-computer interaction module 160 connected to the processing circuit 130. The human-computer interaction module 160 is configured to receive and display the remaining life output by the processing circuit 130.

[0067] The human-computer interaction module 160 can include a display screen, such as a touch display screen. It can also include external devices such as a keyboard and a mouse, which are not limited in the present application.

[0068] The trigger mode of the signal acquisition circuit 120 can be selected through the human-computer interaction module 160. Exemplarily, the trigger mode can include a first trigger mode, a second trigger mode. In the first trigger mode, the sound signal can be acquired upon receiving a first trigger acquisition signal; in the second trigger mode, the sound signal and the electric signal of the relay can be acquired upon receiving a second trigger acquisition signal. A third trigger mode can also be included to acquire the sound signal upon receiving the first trigger acquisition signal, and to acquire the sound signal and the electric signal of the relay upon receiving the second trigger acquisition signal. The trigger mode is not limited in the present application.

[0069] In some embodiments, the device can further include a power module 140 connected to the first coil voltage detection unit 111 to supply power to the first coil voltage detection unit 111.

[0070] In some embodiments, the early warning output module 150 can include a solid-state relay, please refer to Figure 6 When the remaining life is lower than the set threshold, the processing circuit 130 can control the solid-state relay to send out a 24V alarm signal through the signal acquisition circuit 120, or the processing circuit 130 can be directly connected to the solid-state relay to control the solid-state relay to send out a 24V alarm signal in the case of having a driving interface for driving the solid-state relay, and the 24V voltage can be provided by the power module 140. The alarm output unit 151 outputs alarm information after receiving the alarm signal, which can be a sound signal, a light signal, etc., and the corresponding alarm output unit 151 can include a loudspeaker, a buzzer, an LED, etc., which are not limited in the present application. The above scheme can timely send out an alarm when an abnormality occurs, thereby improving safety and reliability.

[0071] The second aspect of the present application also provides a battery device, please refer to Figure 7 The battery device 90 includes a battery pack 901 and a relay 902 coupled to each other, and the relay remaining life monitoring device 100 in any of the above embodiments, and the relay remaining life monitoring device 100 is electrically connected to the relay 902.

[0072] In some embodiments, the device provided by the embodiments of the present disclosure has functions or includes modules that can be used to execute the methods described in the above method embodiment, and the specific implementation can refer to the description of the above method embodiments. For the sake of brevity, it will not be repeated here.

[0073] The above description of each embodiment tends to emphasize the differences between each embodiment, and the same or similar parts can be mutually referred to. For the sake of brevity, it will not be repeated here.

[0074] In several embodiments provided in the present application, it should be understood that the disclosed apparatus can be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative. For example, the division of the modules or units is merely logical function division. In actual implementation, another division manner can be adopted, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, apparatuses or units, and can be in electrical, mechanical or other forms.

[0075] In addition, each function unit in the various embodiments of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit. The integrated unit can be implemented in the form of hardware or software function unit.

Claims

1. A relay remaining life monitoring device characterized by comprising: The method comprises the following steps: a collection trigger circuit configured to output a first trigger collection signal and a second trigger collection signal; a signal collection circuit connected to the collection trigger circuit and configured to collect an acoustic signal emitted by a relay when the first trigger collection signal is received; the signal collection circuit is also connected to the relay and configured to collect the acoustic signal emitted by the relay and an electrical signal of the relay when the second trigger collection signal is received, and the electrical signal comprises at least one of a voltage signal and a current signal; a processing circuit connected to the signal collection circuit and configured to analyze the remaining life of the relay based on the acoustic signal when the acoustic signal is received, and analyze the remaining life of the relay based on the acoustic signal and the electrical signal when the acoustic signal and the electrical signal are received.

2. The apparatus of claim 1, wherein, The collection trigger circuit comprises: a first coil voltage detection unit configured to detect the coil voltage in the relay and output a second trigger control signal when the coil voltage is greater than a first preset threshold; a trigger signal output unit connected to the first coil voltage detection unit and the signal collection circuit, and configured to output the second trigger collection signal to make the signal collection circuit collect the acoustic signal and the electrical signal of the relay when the second trigger control signal is received.

3. The apparatus of claim 1, wherein, The signal collection circuit comprises: an electrical signal detection module connected to the coil and / or contact of the relay and connected to the collection trigger circuit, and configured to detect the coil electrical signal and / or contact electrical signal of the relay, and output a first trigger control signal to the collection trigger circuit when the coil electrical signal and / or the contact electrical signal meets a preset condition, so that the collection trigger circuit outputs a first trigger collection signal.

4. The apparatus of claim 3, wherein, The signal collection circuit further comprises: an acoustic signal detection module configured to detect the acoustic signal emitted by the relay, a signal collection module connected to the collection trigger circuit, the acoustic signal detection module and the electrical signal detection module, and configured to collect the acoustic signal emitted by the relay when the first trigger collection signal or the second trigger collection signal is received; and further collect the coil electrical signal and / or contact electrical signal of the relay when the second trigger collection signal is received.

5. The apparatus of claim 4, wherein, The acoustic signal detection module comprises: an acoustic sensor configured to detect the acoustic signal emitted by the relay; a signal amplifier connected to the acoustic sensor and configured to amplify the acoustic signal output by the acoustic sensor.

6. The apparatus of claim 3, wherein, The electrical signal detection module comprises: a second coil voltage detection unit electrically connected to the coil in the relay and configured to detect the voltage of the coil in the relay; a coil current detection unit electrically connected to the coil in the relay and configured to detect the current of the coil in the relay.

7. The apparatus of claim 3, wherein, The electrical signal detection module comprises: a contact voltage detection unit electrically connected to the contact in the relay and configured to detect the voltage of the contact in the relay; A contact current detection unit electrically connected to the contacts in the relay is configured to detect the current of the contacts in the relay.

8. The apparatus of claim 1, wherein, Further comprising: A pre-warning output module connected to the processing circuit, the pre-warning output module is configured to output pre-warning information when the remaining life of the relay is less than the remaining life threshold, wherein the pre-warning output module includes a solid-state relay, when the remaining life of the relay is less than the remaining life threshold, the processing circuit controls the solid-state relay to issue a 24V alarm signal through the signal acquisition circuit, or the processing circuit is directly connected to the solid-state relay to control the solid-state relay to issue a 24V alarm signal in the case that the processing circuit has a driving interface for driving the solid-state relay.

9. The apparatus of claim 1, wherein, Further comprising: A human-computer interaction module connected to the processing circuit, the human-computer interaction module is configured to receive the remaining life output by the processing circuit and display the remaining life.

10. A battery device comprising a battery pack and a relay coupled to each other, characterized by, Further comprising the relay remaining life monitoring device of any one of claims 1-9, the relay remaining life monitoring device is electrically connected to the relay.

Images