A thermal management high voltage integrated module controller and an electric compressor

Abstract

The utility model discloses a kind of thermal management high-voltage integrated module controller and electric compressor, including voltage regulating unit, communication unit, isolation unit, main chip, drive unit and high-voltage filter circuit, drive unit includes heating unit and the heating control switch corresponding to it one by one, heating control switch is connected with drive unit signal, drive unit is used to drive heating control switch, heating control switch and the output end electric connection of high-voltage filter circuit;Wherein, heating control switch includes two switching circuits, two switching circuits are connected with different IGBT respectively, for controlling the on-off of different heating unit, two switching circuits can be opened alone or simultaneously, to realize the flexible adjustment of heating power.The utility model has the following advantages: by the setting of double-open circuit and multi-path temperature detection circuit, the heating power of heater can be more accurately adjusted according to the operating state of heater, energy is saved, and the probability of overburning of heater is reduced.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a thermal management high-pressure integrated module controller and an electric compressor. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] Currently, under the strong national policies, the popularization of electric vehicles is an inevitable trend. However, in the process of developing electric vehicles, more and more problems are becoming increasingly prominent.

[0004] The demand for new energy electric vehicles continues to grow rapidly. In new energy vehicle systems, in addition to batteries, motors, and electronic controls, the air conditioning system will be the fourth core component. It not only provides air conditioning for the passenger compartment but also needs to be responsible for the heat dissipation of the battery pack management system. It needs to have very high reliability. After integrating the heater and compressor, the control module of the heater also needs to be integrated with the control module of the compressor. Due to the high degree of integration, higher requirements are placed on the structure and internal circuit of the controller. In the existing technology, the heater is controlled by the same set of IGBTs, which poses a risk of low heating efficiency or overheating.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a thermal management high-pressure integrated module controller and electric compressor, which, through the setting of dual-circuit and multi-channel temperature detection circuit, can more accurately adjust the heating power of the heater according to the operating status of the heater, save energy, and reduce the probability of heater overheating.

[0007] This application discloses a thermal management high-voltage integrated module controller, including:

[0008] A voltage regulation unit is used to provide a stable operating voltage;

[0009] The communication unit is used for data interaction with external devices;

[0010] Isolation unit, used for signal isolation;

[0011] The main chip is used for control logic processing;

[0012] The driving unit includes a heating unit and a corresponding heating control switch. The heating control switch is signal-connected to the driving unit. The driving unit is used to drive the heating control switch. The heating control switch is electrically connected to the output terminal of the high-voltage filter circuit.

[0013] The heating control switch includes two switching circuits, which are respectively connected to different IGBTs to control the on / off state of different heating units. The two switching circuits can be turned on individually or simultaneously to achieve flexible adjustment of heating power.

[0014] Furthermore, in the aforementioned thermal management high-voltage integrated module controller, the main chip is connected to multiple temperature detection units, including:

[0015] Two heating unit detection circuits are used to detect the temperature of the heating unit in real time;

[0016] At least one controller temperature detection circuit is provided for detecting the temperature of the controller.

[0017] Two liquid temperature detection circuits are used to detect the temperature at the inlet and outlet.

[0018] Furthermore, the aforementioned thermal management high-voltage integrated module controller also includes a current detection circuit and an amplification circuit. The current detection circuit is used to detect the input current of the controller, which is then input to the main chip after passing through the amplification circuit. When the current exceeds a set threshold, the main chip controls the heating control switch to turn off.

[0019] Furthermore, the aforementioned thermal management high-pressure integrated module controller also includes a motor control unit, which includes a three-phase half-bridge and a compressor electrically connected to the output terminal of the three-phase half-bridge. The main chip is signal-connected to the three-phase half-bridge and the motor control device, respectively.

[0020] Furthermore, the aforementioned thermal management high-voltage integrated module controller also includes a signal transmission module and a transformer circuit. The signal transmission module is configured to receive control signals from the vehicle CAN bus and transmit the control signals to the main chip, so that the main chip accepts and executes the control signals. The signal transmission module includes an isolation circuit, and the output terminal of the transformer circuit is electrically connected to the input terminal of the isolation circuit.

[0021] Furthermore, the aforementioned thermal management high-voltage integrated module controller also includes a sensor, which is signal-connected to the main chip.

[0022] This application also discloses an electric compressor, including the above-described thermal management high-pressure integrated module controller.

[0023] In summary, the structure adopted in this embodiment of the present invention has the following advantages:

[0024] 1. The thermal management high-pressure integrated module controller and electric compressor of this utility model adopt a dual-circuit control of the heating unit. The dual-circuit mode can greatly improve the heat conversion efficiency, quickly convert electrical energy into heat energy, and shorten the heating time. When the temperature reaches the heating requirement, it can be switched to single-circuit mode to maintain temperature stability and reduce energy consumption. The two switching circuits independently control the heating unit and can be turned on individually or simultaneously to improve heating efficiency and avoid overheating.

[0025] 2. The thermal management high-pressure integrated module controller and electric compressor of this utility model are equipped with a multi-channel temperature detection unit, using a low-noise amplifier and a high-resolution ADC, which can collect the temperature change of the PTC heater in real time with an accuracy of ±0.1℃, significantly improving the accuracy of temperature control. The real-time acquisition of temperature data and feedback to the main chip improves the detection speed and accuracy, and real-time monitoring of the heating unit, controller and liquid temperature improves the control accuracy.

[0026] 3. The thermal management high-voltage integrated module controller and electric compressor of this utility model are equipped with a high-precision operational amplifier reference to amplify the detected current. By detecting the current in real time, the current is quickly disconnected when it is too high, realizing overcurrent protection, protecting the controller, and reducing safety hazards.

[0027] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the main circuit structure in an embodiment of this utility model;

[0030] Figure 2 This is a schematic diagram of the control circuit in an embodiment of this utility model;

[0031] Figure 3This is a structural diagram of the temperature detection circuit in an embodiment of this utility model;

[0032] Figure 4 This is a schematic diagram of the current detection circuit and amplification circuit in an embodiment of this utility model. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0034] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0035] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0036] Reference Figures 1 to 4 As shown in the figure, this application discloses a thermal management high-voltage integrated module controller, including:

[0037] A voltage regulation unit is used to provide a stable operating voltage;

[0038] The communication unit is used for data interaction with external devices;

[0039] Isolation unit, used for signal isolation;

[0040] The main chip is used for control logic processing;

[0041] The driving unit includes a heating unit and a corresponding heating control switch. The heating control switch is signal-connected to the driving unit. The driving unit is used to drive the heating control switch. The heating control switch is electrically connected to the output terminal of the high-voltage filter circuit.

[0042] The heating control switch includes two switching circuits, which are respectively connected to different IGBTs to control the on / off state of different heating units. The two switching circuits can be turned on individually or simultaneously to achieve flexible adjustment of heating power.

[0043] With the above structure, a dual-circuit control of the heating unit is adopted. The dual-circuit mode can significantly improve the heat conversion efficiency, quickly convert electrical energy into heat energy, and shorten the heating time. When the temperature reaches the heating requirement, it can be switched to single-circuit mode to maintain temperature stability and reduce energy consumption. The two switching circuits independently control the heating unit, which can be turned on individually or simultaneously, improving heating efficiency and avoiding overheating. The heating unit in this embodiment can be a PTC heater. Compared with other heaters, PTC heaters have the characteristics of rapid heating, self-regulation of temperature in case of fan failure, and long service life, which can improve the stability of use and reduce the risk of failure.

[0044] Specifically, refer to Figure 3 In this embodiment, the main chip is connected to multiple temperature detection units, arranged from left to right, including:

[0045] Two heating unit detection circuits are connected to the heating units respectively, and are used to detect the temperature of the heating units in real time;

[0046] At least one controller temperature detection circuit is connected to the controller for detecting the controller temperature.

[0047] Two liquid temperature detection circuits are connected to the inlet and outlet respectively to detect the temperature at the inlet and outlet.

[0048] In this embodiment, a multi-channel temperature detection unit is set up, using a low-noise amplifier and a high-resolution ADC, which can collect the temperature changes of the PTC heater in real time with an accuracy of ±0.1℃, significantly improving the accuracy of temperature control. The real-time acquisition of temperature data and feedback to the main chip improves the detection speed and accuracy, and monitors the temperature of the heating unit, controller and liquid in real time, thereby improving the control accuracy.

[0049] Specifically, refer to Figure 4In this embodiment, a current detection circuit and an amplification circuit are also included. The current detection circuit detects the input current of the controller, which is then amplified and input to the main chip. When the current exceeds a set threshold, the main chip controls the heating control switch to disconnect. Simultaneously, in this embodiment, a high-precision operational amplifier reference is used to amplify the detected current. By detecting the current in real time, the circuit quickly disconnects when the current is too high, achieving overcurrent protection, protecting the controller, and reducing safety hazards.

[0050] Specifically, refer to Figure 1 In this embodiment, a motor control unit is also included. The motor control unit includes a three-phase half-bridge and a compressor electrically connected to the output terminal of the three-phase half-bridge. The main chip is signal connected to the three-phase half-bridge and the motor control device respectively.

[0051] Specifically, refer to Figure 1 In this embodiment, a signal transmission module and a transformer circuit are also included. The signal transmission module is configured to receive control signals from the vehicle CAN bus and transmit the control signals to the main chip so that the main chip accepts and executes the control signals. The signal transmission module includes an isolation circuit, and the output terminal of the transformer circuit is electrically connected to the input terminal of the isolation circuit.

[0052] Specifically, in this embodiment, a sensor is also included, which is signal-connected to the main chip.

[0053] Reference Figure 1 and Figure 2 In this embodiment, the low-voltage control circuit function is realized through an auxiliary power supply control circuit, an isolation transformer, a 10V to 5V circuit, a 5.5V to 3.3V circuit, and a drive power supply circuit. The signal isolation circuit function is realized through a CAN interface circuit and a communication isolation circuit. The heating drive circuit function is realized through a PTC drive circuit. The heating control switch function is realized through an IGBT. The two switch circuits are respectively connected to different IGBTs to control the on / off state of different heating units. The two switch circuits can be turned on individually or simultaneously to achieve flexible adjustment of heating power.

[0054] This embodiment also provides an electric compressor, including the above-mentioned thermal management high-pressure integrated module controller.

[0055] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0056] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0057] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A thermal management high-voltage integrated module controller, characterized in that, include: A voltage regulation unit is used to provide a stable operating voltage; The communication unit is used for data interaction with external devices; Isolation unit, used for signal isolation; The main chip is used for control logic processing; The driving unit includes a heating unit and a corresponding heating control switch. The heating control switch is signal-connected to the driving unit. The driving unit is used to drive the heating control switch. The heating control switch is electrically connected to the output terminal of the high-voltage filter circuit. The heating control switch includes two switching circuits, which are respectively connected to different IGBTs to control the on / off state of different heating units. The two switching circuits can be turned on individually or simultaneously to achieve flexible adjustment of heating power.

2. The thermal management high-voltage integrated module controller according to claim 1, characterized in that, The main chip is connected to multiple temperature detection units, including: Two heating unit detection circuits are used to detect the temperature of the heating unit in real time; At least one controller temperature detection circuit is provided for detecting the temperature of the controller. Two liquid temperature detection circuits are used to detect the temperature at the inlet and outlet.

3. The thermal management high-voltage integrated module controller according to claim 1, characterized in that, It also includes a current detection circuit and an amplification circuit. The current detection circuit is used to detect the input current of the controller, which is then amplified and input to the main chip. When the current exceeds a set threshold, the main chip controls the heating control switch to turn off.

4. The thermal management high-voltage integrated module controller according to claim 1, characterized in that, It also includes a motor control unit, which includes a three-phase half-bridge and a compressor electrically connected to the output of the three-phase half-bridge. The main chip is signal-connected to the three-phase half-bridge and the motor control unit, respectively.

5. The thermal management high-voltage integrated module controller according to claim 1, characterized in that, It also includes a signal transmission module and a transformer circuit. The signal transmission module is configured to receive control signals from the vehicle CAN bus and transmit the control signals to the main chip so that the main chip accepts and executes the control signals. The signal transmission module includes an isolation circuit, and the output terminal of the transformer circuit is electrically connected to the input terminal of the isolation circuit.

6. The thermal management high-voltage integrated module controller according to claim 1, characterized in that, It also includes a sensor, which is signal-connected to the main chip.

7. An electric compressor, characterized in that, The electric compressor includes the thermal management high-pressure integrated module controller as described in any one of claims 1 to 6.

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