A relay detection method and a relay detection device

Abstract

The present invention discloses a relay detection method and a relay detection device, and relates to the field of electricity safety technology. First, the relay is disconnected, a battery pack in a battery box is connected to a power module to form a detection circuit, and then the voltage at both ends of the relay is detected. If the voltages at both ends are equal, it is determined that the relay is stuck. Compared with the prior art, the relay detection method provided by the present invention adopts the step of detecting the voltage at both ends of the relay, and if the voltages at both ends are equal, it is determined that the relay is stuck, so it can quickly detect whether the relay is stuck, ensure the stable operation of the circuit, and will not affect the circuit, which is safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of electricity safety, and in particular to a relay detection method and a relay detection device. Background Art

[0002] Relays are important components in the control circuit of new energy vehicles, and they play the role of automatic adjustment, safety protection, circuit conversion, etc. In the circuit of new energy vehicles, if the relay fails, the high current in the circuit will have a great impact on the battery and electronic control, and may even cause serious damage.

[0003] In view of this, it is particularly important to design and manufacture a stable and reliable relay detection method and relay detection device, especially in the production of new energy vehicles. Summary of the invention

[0004] The object of the present invention is to provide a relay detection method, which is simple to operate, can quickly detect whether the relay is stuck, ensure the stable operation of the circuit, and will not affect the circuit, and is safe and reliable.

[0005] Another object of the present invention is to provide a relay detection device with a simple structure, which can quickly detect whether the relay is stuck, ensure the stable operation of the circuit, and will not affect the circuit. It is safe, reliable, practical and efficient.

[0006] The present invention is achieved by adopting the following technical solutions.

[0007] A relay detection method is used to detect whether a relay in a power-consuming module is damaged. The relay detection method includes: disconnecting the relay, connecting a battery pack in a battery box to the power-consuming module to form a detection loop; detecting the voltage at both ends of the relay, and if the voltages at both ends are equal, it is determined that the relay is stuck.

[0008] Furthermore, the relay is disconnected, and a battery pack in the battery box is connected to a power-consuming module to form a detection circuit. In the step, there are multiple power-consuming modules, which are connected in parallel and are all connected to the battery pack to detect multiple relays at the same time.

[0009] Further, the voltages at both ends of the relay are detected. If the voltages at both ends are equal, the step of determining whether the relay is stuck includes: detecting the voltage at one end of the relay to obtain a first voltage; detecting the voltage at the other end of the relay to obtain a second voltage; comparing the first voltage and the second voltage. If the first voltage is equal to the second voltage, determining that the relay is stuck; if the first voltage is not equal to the second voltage, determining that the relay is not stuck.

[0010] Further, by comparing the first voltage and the second voltage, if the first voltage is equal to the second voltage, it is determined that the relay is stuck; if the first voltage is not equal to the second voltage, in the step of determining that the relay is not stuck, if it is determined that the relay is stuck, an error signal is issued and power is stopped on the power-consuming module.

[0011] Furthermore, after the step of detecting the voltage at both ends of the relay and determining that the relay is stuck if the voltages at both ends are equal, the relay detection method also includes: if the voltages at both ends are not equal, closing the relay and detecting the voltage at both ends of the relay, and if the voltages at both ends are not equal, determining that the relay cannot be attracted.

[0012] Furthermore, if the voltages at both ends are not equal, the relay is closed and the voltages at both ends of the relay are detected. If the voltages at both ends are not equal, the step of determining that the relay cannot be attracted includes: detecting the voltage at one end of the relay to obtain a third voltage; detecting the voltage at the other end of the relay to obtain a fourth voltage; comparing the third voltage and the fourth voltage. If the third voltage is not equal to the fourth voltage, determining that the relay cannot be attracted; if the third voltage is equal to the fourth voltage, determining that the relay is not damaged.

[0013] Further, by comparing the third voltage and the fourth voltage, if the third voltage is not equal to the fourth voltage, it is determined that the relay cannot be attracted; if the third voltage is equal to the fourth voltage, it is determined that the relay is not damaged. If it is determined that the relay cannot be attracted, an error signal is issued and power is stopped to the power module.

[0014] A relay detection device is used to implement the above-mentioned relay detection method. The relay detection device includes a battery box and a power module. The power module includes a relay and an electrical appliance. The battery box is electrically connected to the electrical appliance through the relay, and the combination forms a conductive loop. The battery box includes a plurality of battery packs connected in series, one of which is electrically connected to the electrical appliance through the relay, and the combination forms a detection loop.

[0015] Furthermore, a first switch is provided in the conductive loop, and a second switch is provided in the detection loop.

[0016] Furthermore, there are multiple relays and multiple electrical appliances, and each relay is connected to one electrical appliance.

[0017] The relay detection method and relay detection device provided by the present invention have the following beneficial effects:

[0018] The relay detection method provided by the present invention first disconnects the relay, connects a battery pack in the battery box to the power module to form a detection loop, and then detects the voltage at both ends of the relay. If the voltages at both ends are equal, the relay is determined to be stuck. Compared with the prior art, the relay detection method provided by the present invention detects the voltage at both ends of the relay, and if the voltages at both ends are equal, the relay is determined to be stuck. Therefore, it can quickly detect whether the relay is stuck, ensure the stable operation of the circuit, and will not affect the circuit, which is safe and reliable.

[0019] The relay detection device provided by the present invention is used to implement the relay detection method. It has a simple structure and can quickly detect whether the relay is stuck, thereby ensuring stable operation of the circuit and will not affect the circuit. It is safe, reliable, practical and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of the structure of a relay detection device provided by an embodiment of the present invention;

[0022] Figure 2 A flowchart of a relay detection method according to an embodiment of the present invention;

[0023] Figure 3 A flowchart of a relay detection method provided by an embodiment of the present invention.

[0024] Icons: 100 - relay detection device; 110 - battery box; 111 - battery pack; 120 - power module; 121 - relay; 122 - electrical appliance; 130 - first switch; 140 - second switch. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0031] Example

[0032] Please refer to Figure 1, an embodiment of the present invention provides a relay detection device 100 for detecting whether a relay 121 in a power module 120 is damaged. It has a simple structure, can quickly detect whether the relay 121 is adhered, ensures stable operation of the circuit, and will not affect the circuit. It is safe, reliable, practical and efficient. The relay detection device 100 includes a battery box 110 and a power module 120. The battery box 110 is electrically connected to the power module 120 to supply power to the power module 120, and the power module 120 uses electrical energy to operate to achieve specific functions. In this embodiment, the relay detection device 100 is applied to new energy vehicles to protect the entire vehicle circuit and ensure that the new energy vehicle can operate safely and stably.

[0033] It is worth noting that the power module 120 includes a relay 121 and an electrical appliance 122. The battery box 110 is electrically connected to the electrical appliance 122 through the relay 121, and the combination forms a conductive loop. The current in the conductive loop is relatively large to ensure that the electrical appliance 122 can operate normally. The relay 121 can turn on or off the conductive loop, so that the electrical appliance 122 is powered on or powered off, thereby controlling the electrical appliance 122, and the electrical appliance 122 is used to operate using electrical energy to achieve specific functions. In this embodiment, a first switch 130 is provided in the conductive loop, and the first switch 130 is provided at one end of the battery box 110. The first switch 130 can also turn on or off the conductive loop to facilitate the detection of the relay 121.

[0034] The battery box 110 includes a plurality of battery packs 111 connected in series, wherein one battery pack 111 is electrically connected to an electrical appliance 122 via a relay 121, and the combination forms a detection circuit, and the battery pack 111 is a preset battery pack (not shown). The current in the detection circuit is small to prevent the detection current from affecting the conductive circuit. The relay 121 can turn on or off the detection circuit, which is convenient for detecting the relay 121. In the present embodiment, a second switch 140 is provided in the detection circuit, and the second switch 140 is provided at one end of the preset battery pack, and the second switch 140 can also turn on or off the detection circuit, so as to detect the relay 121.

[0035] It should be noted that, in the present embodiment, only one battery pack 111 is used as the power source of the detection circuit. When the detection circuit is turned on, the current therein is very small and will not affect the functions of the various devices in the detection circuit, thereby avoiding affecting the normal function of the conductive circuit and ensuring the safety, stability, reliability and practicality of the detection process.

[0036] In this embodiment, there are multiple power modules 120, which are connected in parallel and connected to the battery box 110. The battery box 110 can supply power to multiple power modules 120 at the same time. The multiple power modules 120 are also connected to a preset battery pack to facilitate simultaneous detection of relays 121 in multiple power modules 120. There are multiple relays 121 and multiple electrical appliances 122, and each relay 121 is connected to one electrical appliance 122 to control the opening or closing of the corresponding electrical appliance 122.

[0037] Please refer to Figure 2 and Figure 3 The embodiment of the present invention further provides a relay detection method for using the relay detection device 100 to detect whether the relay 121 in the power module 120 is damaged.

[0038] The relay detection method comprises the following steps:

[0039] Step S101: disconnect the relay 121, connect a battery pack 111 in the battery box 110 to the power module 120, and form a detection loop.

[0040] It is worth noting that in step S101, the first switch 130 is disconnected to disconnect the conductive circuit, the battery box 110 is disconnected from the power module 120, and the battery box 110 will not supply power to the power module 120; the second switch 140 is disconnected to disconnect the detection circuit, the preset battery pack is disconnected from the power module 120, and the preset battery pack will not output current; the relay 121 is disconnected to facilitate the detection of the relay 121.

[0041] Step S102: Detect the voltages at both ends of the relay 121. If the voltages at both ends are equal, it is determined that the relay 121 is stuck.

[0042] It should be noted that in step S102, the second switch 140 is closed and the relay 121 remains in the disconnected state. At this time, if the relay 121 is stuck, the entire detection circuit is turned on and the voltages at both ends of the relay 121 are equal. If the relay 121 is not stuck, the entire detection circuit is turned off and the voltages at both ends of the relay 121 are not equal.

[0043] Specifically, step S102 includes three steps, namely:

[0044] Step S1021: Detect the voltage at one end of the relay 121 to obtain a first voltage.

[0045] Step S1022: Detect the voltage at the other end of the relay 121 to obtain a second voltage.

[0046] Step S1023: comparing the first voltage and the second voltage, if the first voltage is equal to the second voltage, it is determined that the relay 121 is stuck; if the first voltage is not equal to the second voltage, it is determined that the relay 121 is not stuck.

[0047] It should be noted that in step S1023, if it is determined that the relay 121 is stuck, an error signal is issued, and the battery box 110 is stopped from energizing the power module 120, so as to notify the staff to perform maintenance and ensure the safety of the conductive circuit.

[0048] Step S103: If the voltages at both ends are not equal, the relay 121 is closed, and the voltages at both ends of the relay 121 are detected. If the voltages at both ends are not equal, it is determined that the relay 121 cannot be closed.

[0049] It should be noted that in step S103, the relay 121 is closed. At this time, the second switch 140 and the relay 121 are both in a closed state. If the relay 121 can be normally attracted, the entire detection circuit is turned on, and the voltages at both ends of the relay 121 are equal. If the relay 121 cannot be attracted, the entire detection circuit is disconnected, and the voltages at both ends of the relay 121 are not equal.

[0050] Specifically, step S103 includes three steps, namely:

[0051] Step S1031: Detect the voltage at one end of the relay 121 to obtain a third voltage.

[0052] Step S1032: Detect the voltage at the other end of the relay 121 to obtain a fourth voltage.

[0053] Step S1033: comparing the third voltage and the fourth voltage, if the third voltage is not equal to the fourth voltage, it is determined that the relay 121 cannot be attracted; if the third voltage is equal to the fourth voltage, it is determined that the relay 121 is not damaged.

[0054] It should be noted that in step S1033, if it is determined that the relay 121 cannot be attracted, an error signal is issued, and the battery box 110 is stopped from energizing the power module 120, so as to notify the staff to perform maintenance and ensure the safety of the conductive circuit. If it is determined that the relay 121 can be attracted normally, it means that the relay 121 is intact, and the second switch 140 can be disconnected, and the first switch 130 is closed, so that the battery box 110 can power on the power module 120. At this time, the detection circuit is disconnected, and the relay 121 can accurately control the conductive circuit to be disconnected or connected.

[0055] The relay detection method provided in the embodiment of the present invention first disconnects the relay 121, connects a battery pack 111 in the battery box 110 to the power module 120 to form a detection loop, and then detects the voltage at both ends of the relay 121. If the voltages at both ends are equal, it is determined that the relay 121 is stuck. Compared with the prior art, the relay detection method provided in the present invention uses the step of detecting the voltage at both ends of the relay 121, and if the voltages at both ends are equal, it is determined that the relay 121 is stuck. Therefore, it can quickly detect whether the relay 121 is stuck, ensure the stable operation of the circuit, and will not affect the circuit. It is safe and reliable. The relay detection device 100 is stable, practical, and cost-effective.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A relay detection method for detecting whether a relay in a power module is damaged, characterized in that: The relay detection method comprises: Disconnect the relay and connect a battery pack in the battery box to the power-consuming module to form a detection loop; Detecting the voltages at both ends of the relay, and if the voltages at both ends are equal, determining that the relay is stuck; The method of disconnecting the relay and connecting a battery pack in the battery box to the power-consuming module to form a detection circuit includes: Disconnect the first switch to disconnect the conductive loop between the battery box and the power module, so that the battery box will not supply power to the power module; Disconnect the second switch, so that the detection circuit between the one battery pack and the power-consuming module is disconnected, and the one battery pack does not output current; disconnecting the relay; The detecting of the voltage at both ends of the relay comprises: The second switch is closed, the relay remains in an open state, and the voltage across the relay is detected; The step of detecting the voltages at both ends of the relay and determining that the relay is stuck if the voltages at both ends are equal comprises: Detecting a voltage at one end of the relay to obtain a first voltage; Detecting the voltage at the other end of the relay to obtain a second voltage; comparing the first voltage and the second voltage, and if the first voltage is equal to the second voltage, determining that the relay is stuck; if the first voltage is not equal to the second voltage, determining that the relay is not stuck; After the step of detecting the voltages at both ends of the relay and determining that the relay is stuck if the voltages at both ends are equal, the relay detection method further comprises: if the voltages at both ends are not equal, closing the relay and detecting the voltages at both ends of the relay, and if the voltages at both ends are not equal, determining that the relay cannot be attracted; If the voltages at both ends are not equal, the relay is closed, and the voltages at both ends of the relay are detected. If the voltages at both ends are not equal, the step of determining that the relay cannot be attracted comprises: detecting a voltage at one end of the relay to obtain a third voltage; detecting the voltage at the other end of the relay to obtain a fourth voltage; The third voltage and the fourth voltage are compared. If the third voltage is not equal to the fourth voltage, it is determined that the relay cannot be attracted; if the third voltage is equal to the fourth voltage, it is determined that the relay is not damaged.

2. The relay detection method according to claim 1, characterized in that: In the step of disconnecting the relay and connecting a battery pack in the battery box to the power-consuming module to form a detection circuit, there are multiple power-consuming modules, and the multiple power-consuming modules are connected in parallel and are all connected to the battery pack to detect multiple relays at the same time.

3. The relay detection method according to claim 1, characterized in that: In the step of comparing the first voltage and the second voltage, if the first voltage is equal to the second voltage, determining that the relay is stuck; if the first voltage is not equal to the second voltage, determining that the relay is not stuck, if it is determined that the relay is stuck, an error signal is issued and power-on to the power-consuming module is stopped.

4. The relay detection method according to claim 1, characterized in that: In the step of comparing the third voltage and the fourth voltage, if the third voltage is not equal to the fourth voltage, determining that the relay cannot be attracted; if the third voltage is equal to the fourth voltage, determining that the relay is not damaged, if it is determined that the relay cannot be attracted, an error signal is issued and power-on to the power-consuming module is stopped.

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