An excitation device with current detection function

Abstract

The application discloses an excitation device with a current detection function, which comprises an excitation shell, an excitation source, a conductive row and a current detection module. The excitation source is arranged on the excitation shell, the conductive row is arranged in the excitation shell, and both ends of the conductive row are located outside the excitation shell. The excitation source releases driving force to disconnect the conductive row according to a received trigger signal. An alloy resistor as a resistance alloy is connected in series on the conductive row, and the current detection module is arranged at the alloy resistor to collect current data and temperature data at the alloy resistor. The integration degree of the current detection device and the excitation device can be improved, and the excitation device integrated with the current detection module is more miniaturized.

Description

Technical Field

[0001] This invention relates to the field of circuit protection, specifically to an excitation device with current detection function used for circuit protection. Background Technology

[0002] Currently, in circuit protection systems for electric vehicles, wind, solar, and energy storage, excitation fuses are used for short circuits and interruption under special circumstances, while current sensors (such as magnetic induction current sensors and resistance alloys) are used for current detection and feedback, which can meet the full current measurement and protection requirements of the circuit protection system. However, the current sensor and the excitation fuse are two independent components, performing current detection and system protection functions respectively. When used in electric vehicles, this is not conducive to the development trend of BDU integration and miniaturization. Summary of the Invention

[0003] The purpose of this invention is to provide an excitation device that integrates a resistance alloy onto a conductive busbar and mounts a modular current detection device on the resistance alloy. In applications requiring both a current sensor and an excitation device, this reduces contact resistance while decreasing the number of components, thereby improving integration.

[0004] To achieve the above objectives, the present invention provides an excitation device with current detection function. The excitation device includes an excitation housing, an excitation source, a conductive busbar, and a current detection module. The excitation source is disposed on the excitation housing, and the conductive busbar passes through the excitation housing with both ends located outside the excitation housing. The excitation source releases a driving force to disconnect the conductive busbar according to a received trigger signal. An alloy resistor, which serves as a resistance alloy, is connected in series on the conductive busbar. The current detection module is disposed at the resistance alloy and is used to collect current and temperature data at the resistance alloy.

[0005] Preferably, the current detection module includes a current detection module housing, a connector and a temperature detection element disposed on the current detection module housing; current data sampling points are respectively disposed at both ends of the resistance alloy in the current direction; the temperature detection element is disposed close to the resistance alloy, and the connector is connected to the current data sampling points and the temperature detection element respectively through pins.

[0006] Preferably, the connector is integrally injection molded onto the housing of the current detection module.

[0007] Preferably, the current data sampling points of the resistance alloy are conductive posts located at both ends of the current direction of the resistance alloy.

[0008] Preferably, the current detection module is configured as a PCBA surface mount structure.

[0009] Preferably, the resistance alloy and the current detection module are respectively disposed outside or inside the excitation housing.

[0010] Preferably, the housing of the current detection module is integrally formed with the excitation housing.

[0011] Preferably, a PCBA control board is provided on the excitation device, the current detection module is connected to the PCBA control board, and the PCBA control board is connected to the data receiving end of the excitation source to send a trigger signal to the excitation source.

[0012] Preferably, the device further includes a piston, which is disposed corresponding to a conductive busbar. The driving force released by the excitation source drives the piston, and the piston displacement disconnects the conductive busbar.

[0013] The excitation device with current detection function of the present invention has an alloy resistor directly connected in series on the conductive busbar, and then a modular current detection device is set at the alloy resistor, which improves the integration of the current detection device and the excitation device and makes the excitation device with integrated current detection module more miniaturized.

[0014] An alloy resistor is connected in series with the busbar to reduce the contact resistance between the resistor alloy and the busbar.

[0015] The housing of the current detection module, the connector, and the housing of the excitation device are integrally injection molded, reducing the number of parts, simplifying the assembly process, and reducing the workload of assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an excitation device equipped with a current detection module.

[0017] Figure 2 yes Figure 1 A partial enlarged view of the current detection module in the image.

[0018] Figure 3 This is another structural diagram of the current detection module.

[0019] Figure 4 This is a schematic diagram of the current detection module configured as a PCBA surface mount structure.

[0020] Figure label:

[0021] 1. Excitation housing; 2. Conductor busbar; 3. Resistance alloy; 4. Current detection module; 5. Data sampling conductive post; 6. Temperature detection element; 7. Connector; 8. Pin; 9. Current detection module housing. Detailed Implementation

[0022] The present invention discloses an excitation device with current detection function. The excitation device includes an excitation housing, an excitation source, a conductive busbar, and a current detection module. The excitation source is disposed on the excitation housing, and the conductive busbar passes through the excitation housing with both ends of the conductive busbar located outside the excitation housing. The excitation source releases a driving force to disconnect the conductive busbar according to a received trigger signal. An alloy resistor, which is a resistance alloy, is connected in series on the conductive busbar. The current detection module is disposed at the resistance alloy and is used to collect current data and temperature data at the resistance alloy.

[0023] The following describes preferred embodiments in detail with reference to the accompanying drawings. The directional terms used are for reference only and do not constitute a limitation on the technical solution of this invention.

[0024] See the excitation device with current detection function. Figures 1 to 2 The excitation device includes an excitation housing 1, an excitation source, and a conductive busbar 2. The excitation source is mounted on the excitation housing 1, and the conductive busbar 2 passes through the excitation housing 1. The two ends of the conductive busbar 2 located outside the excitation housing 1 serve as the connection terminals of the excitation device. The excitation source actuates upon receiving a trigger signal, releasing a driving force that breaks the conductive busbar 2, thereby achieving circuit protection. Alternatively, it may include a piston located within the excitation housing. The driving force released by the excitation source drives the piston to displace, and the kinetic energy of the piston's displacement breaks the conductive busbar 2, thus disconnecting the circuit and achieving circuit protection.

[0025] It also includes a resistance alloy 3 and a current detection module 4. The resistance alloy 3 serves as a current sensor for current sampling. The resistance alloy 3 is connected in series with the busbar 2. The resistance alloy 3 can be located on the busbar 2 inside the excitation housing 1 or on the busbar 2 outside the excitation housing 1. Correspondingly, the current detection module 4 is located at the resistance alloy 3, and its location follows that of the resistance alloy 3. That is, if the resistance alloy 3 is located inside the excitation housing 1, the current detection module 4 is located inside the excitation housing 1; if the resistance alloy 3 is located outside the excitation housing 1, the current detection module 4 is located outside the excitation housing 1. The resistance alloy 3 is connected in series with the busbar 2. On the one hand, it is part of the busbar 2 and integrally formed with it, avoiding the contact resistance caused by bolt connection after the resistance alloy overlaps with the busbar 2. Therefore, the resistance alloy connected in series with the busbar 2 can reduce the contact resistance. On the other hand, it is used to sense current changes, making it convenient for the current detection module 4 to collect current data on the busbar.

[0026] The current detection module 4 is mounted on the resistance alloy 3 and collects real-time current data. The following description assumes that both the resistance alloy 3 and the current detection module 4 are located outside the excitation housing 1; for a more detailed structure, please refer to [link to relevant documentation]. Figure 1 and Figure 2A current data sampling conductive post 5 is respectively set on the conductive busbar 2 at both ends of the current direction of the resistance alloy 3. The current detection module 4 includes a current detection module housing 9, a temperature detection element 6, and a connector 7. The temperature detection element 6 is installed in the current detection module housing 9, and the connector 7 is set on the current detection module housing 9. Several pins 8 on the connector 7 are respectively connected to the temperature detection element 6 for data connection and to the current data sampling conductive post 5 for conductive connection. The temperature detection element 6 in the current detection module 4 is set close to the resistance alloy 3 to sense the temperature change at the resistance alloy 3. Through the connector 7, the current data and temperature data detected by the resistance alloy 3 are sent to the control terminal to provide data support for system control decisions, such as SOC calculation and excitation triggering. The control terminal sends a trigger signal to the excitation source.

[0027] The control terminal can be located inside the excitation device, at the user end, or both. When located inside the excitation device, a PCBA control board is typically used; when located at the user end, it is generally installed in the user's control system.

[0028] When the excitation device has an internal PCBA control board, the connector on the current detection module 4 can be connected to the PCBA control board via a connector. The PCBA control board is connected to the data receiving end of the excitation source. The current detection module 4 sends the detected current and temperature data to the PCBA control board. When the current on the conductor 2 exceeds a set threshold, a trigger signal is sent to the excitation source via the PCBA, triggering the excitation source to act and drive the piston to disconnect the conductor. With this setup, no additional control terminal is required at the user end to control the excitation source's action.

[0029] When the excitation device does not have a PCBA control board, but only the user end is equipped with one, the current detection module 4 is connected to the user end control system and controls the sending of a trigger signal to the excitation source.

[0030] When control terminals are installed both inside the excitation device and at the user end, the current detection module 4 is simultaneously connected to both the PCBA control board inside the excitation device and the control system at the user end. Trigger signals are sent to the excitation source through both the PCBA control board and the control system at the user end. The excitation source then operates based on the first received trigger signal. This design improves the reliability of the excitation source being triggered.

[0031] To further improve integration, reduce the number of components in the excitation device, and simplify the assembly process, the current detection module 4 is integrated with the excitation housing 1. (See [link]) Figure 3The connector 7, the current detection module housing 9, and the excitation housing 1 are formed into an integrated structure through injection molding. When the excitation housing 1 is divided into several housing parts, the housing of the current detection module is integrally formed with the housing parts that facilitate installation.

[0032] See Figure 4 The current detection module 4 is a PCBA surface mount structure. Within this structure, a temperature sensing element 6 and a connector 7 are incorporated. The pins of connector 7, which connect to the current signal sampling points of the resistance alloy 3, are surface mount. The current signal sampling points are directly located in the sampling areas at both ends of the resistance alloy. The surface mount pins of connector 7 are directly connected to the current signal sampling points via surface contact, such as through soldering. This PCBA surface mount structure of the current detection module 4 results in a flattened, miniaturized design, reducing the space occupied by the excitation device while ensuring stable and reliable operation.

[0033] The above Figures 1 to 4 The current detection module 4 is located on the outside of the excitation housing 1. Alternatively, the current detection module 4 can be integrally formed inside the excitation housing 1. When located inside the excitation housing 1, in order not to increase the volume of the excitation housing, it is preferable to place the current detection module 4 on the part of the excitation housing 1 that contacts the conductive busbar 2, such as between the piston displacement cavity and the outer wall of the excitation housing.

Claims

1. An excitation device with a current detection function, characterized by The excitation device comprises an excitation shell, an excitation source, a conductive row, and a current detection module; the excitation source is arranged on the excitation shell, the conductive row is arranged in the excitation shell, both ends of the conductive row are located outside the excitation shell, and the excitation source releases driving force to disconnect the conductive row according to a received trigger signal; An alloy resistor as a resistance alloy is connected in series on the conductive row, and the current detection module is arranged at the alloy resistor to collect current data and temperature data at the alloy resistor.

2. The excitation device of claim 1, wherein The current detection module comprises a current detection module shell, a connector, and a temperature detection element arranged on the current detection module shell; both ends of the alloy resistor in the current direction are respectively provided with current data sampling points; The temperature detection element is arranged close to the alloy resistor, and the connector is connected with the current data sampling points and the temperature detection element through pins.

3. The excitation device of claim 2, wherein The connector is integrally injection molded on the current detection module shell.

4. The excitation device of claim 3, wherein The current data sampling points of the alloy resistor are conductive columns arranged at both ends of the alloy resistor in the current direction.

5. The excitation device of claim 3, wherein The current detection module is arranged in a PCBA patch type structure.

6. The excitation device of claim 1, wherein The alloy resistor and the current detection module are arranged inside or outside the excitation shell.

7. An excitation device according to any one of claims 1 to 6, characterised in that, The current detection module shell is integrally formed with the excitation shell.

8. The excitation device of claim 1, wherein A PCBA control board is arranged on the excitation device, the current detection module is connected with the PCBA control board, the PCBA control board is connected with a data receiving end of the excitation source, and the PCBA control board sends a trigger signal to the excitation source.

9. The excitation device of claim 1, wherein A piston corresponding to the conductive row is further arranged, the driving force released by the excitation source drives the piston, and the piston is displaced to disconnect the conductive row.

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