A circuit supporting temperature detection channel expansion

Abstract

This invention relates to a circuit supporting the expansion of a temperature detection channel, comprising a temperature expansion unit and a temperature detection unit. The temperature detection unit includes at least one set of first temperature detection circuits and at least one set of second temperature detection circuits. The first temperature detection circuits are connected to the temperature expansion unit, and the second temperature detection circuits are also connected to the temperature expansion unit. This invention utilizes the existing temperature detection channel of the temperature detection unit without adding a new temperature detection unit. Therefore, it can achieve compatibility with existing battery management systems' temperature detection channels with minimal circuit modifications, while simultaneously expanding the functionality of the temperature detection channel as needed.

Description

Technical Field

[0001] This invention relates to circuit systems, and more particularly to a circuit that supports the expansion of temperature detection channels. Background Technology

[0002] Temperature detection channels are typically finalized after product design, especially in battery management systems (BMS) which require monitoring battery temperature. Different types of battery systems require different temperature detection channels, and using multiple BMS systems stacked together would significantly increase costs. For example, marine and underground mining battery systems require the same temperature and voltage detection channels. In such cases, traditional electric vehicle BMS systems are unsuitable. This results in an inflexible approach to meeting the temperature detection channel requirements of different battery systems, necessitating the development of different products with longer development and verification cycles, leading to higher costs. Summary of the Invention

[0003] Therefore, it is necessary to provide a circuit that supports the expansion of temperature detection channels to address the issue of high costs associated with adding temperature detection channels.

[0004] A circuit supporting temperature detection channel expansion includes a temperature expansion unit and a temperature detection unit. The temperature detection unit includes at least one set of first temperature detection circuits and at least one set of second temperature detection circuits. The first temperature detection circuits are connected to the temperature expansion unit, and the second temperature detection circuits are connected to the temperature expansion unit.

[0005] In one embodiment, the first temperature detection circuit includes resistor R11, resistor R12 and capacitor C1. One end of resistor R11 is connected to VCC terminal, and the other end of resistor R11, one end of resistor R12 and one end of capacitor C1 form a node. One end of the node forms a first port A1, and the other end is connected to the temperature extension unit.

[0006] In one embodiment, the resistor R12 is a thermistor.

[0007] In one embodiment, the first temperature detection circuit is provided in multiple groups, and each group of the first temperature detection circuit is connected to one of the temperature extension units.

[0008] In one embodiment, the second temperature detection circuit includes resistor R31, resistor R32 and capacitor C3. One end of resistor R31 is connected to VCC terminal, and the other end of resistor R31, one end of resistor R32 and one end of capacitor C3 form a node. One end of the node forms a third port A3, and the other end is connected to the temperature extension unit.

[0009] In one embodiment, the second temperature detection circuit is provided in multiple groups, and each group of the second temperature detection circuit is connected to the temperature extension unit.

[0010] In one embodiment, R22 is a thermistor.

[0011] In one embodiment, the temperature extension unit further includes a multiplexer MUX, and the third port A3 is connected to the multiplexer MUX of the temperature extension unit and controls the opening and closing of the multiplexer MUX.

[0012] In one embodiment, a resistor Rx is also included, with one end of the resistor Rx grounded and the other end connected to the temperature extension unit.

[0013] In one embodiment, the resistor Rx is a thermistor. Attached Figure Description

[0014] Figure 1 This is the circuit diagram of the present invention. Detailed Implementation

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0016] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0017] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0018] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0020] This invention relates to a circuit that supports the expansion of temperature detection channels. It can be applied to battery management systems and can expand the existing temperature detection channels of the battery management system to a different number of temperature detection channels, so that the existing product can meet the initial design requirements and can be expanded to a different number of temperature detection channels according to actual needs.

[0021] Please see Figure 1In this embodiment, a temperature extension unit 10 and a temperature detection unit 20 are included. The temperature detection unit 20 includes a first temperature detection circuit 21 and a second temperature detection circuit 22. The first temperature detection circuit 21 is connected to the temperature extension unit 10, and the second temperature detection circuit 22 is connected to the temperature extension unit 10.

[0022] In this embodiment, the temperature detection unit 20 can be a battery management unit capable of temperature detection. The temperature detection unit 20 can have multiple detection circuits to meet temperature detection requirements. A temperature expansion unit 10 is also provided, which can be connected to the temperature detection unit 20. This allows for the expansion of the temperature detection channels within the existing temperature detection unit 20 without adding new temperature detection units 20. Furthermore, multiple temperature expansion units 10 can be added as needed. This achieves compatibility with existing battery management system temperature detection channels with minimal circuit modifications, while also allowing for the expansion of temperature detection channel functionality as required.

[0023] Furthermore, the first temperature detection circuit includes resistors R11 and R12, and capacitor C1. One end of resistor R11 is connected to VCC. The other end of resistor R11, one end of resistor R12, and one end of capacitor C1 form a node. One end of this node forms a first port A1, and the other end is connected to the temperature extension unit 10. Thus, the first temperature detection circuit can be connected to the temperature extension unit 10. The first port A1 can be a port for temperature detection by a microcontroller and can be used for signal transmission.

[0024] It should be noted that multiple sets of the first temperature detection circuit can be configured, and correspondingly, multiple sets of temperature extension units 10 can also be configured, with each set of the first temperature detection circuit connected to one of the temperature extension units 10. For example... Figure 1 It may also include resistors R21 and R22, and capacitor C2. One end of resistor R21 is connected to VCC. The other end of resistor R21, one end of resistor R22, and one end of capacitor C2 form a node. One end of this node forms a second port A2, and the other end is connected to another temperature extension unit 10. Therefore, more temperature extension units 10 can be introduced when more temperature detection channels are needed. The second port A2 can be a port for microcontroller temperature detection and can be used for signal transmission.

[0025] In this embodiment, the second temperature detection circuit 22 includes resistors R31 and R32 and capacitor C3. One end of resistor R31 is connected to VCC. The other end of resistor R31, one end of resistor R32, and one end of capacitor C3 form a node. One end of this node forms a third port A3, and the other end is connected to the temperature extension unit 10. Thus, a set of second temperature detection circuits can be connected to the temperature extension unit 10 through the third port A3. The third port A3 can be a port for temperature detection by a microcontroller and can be used for signal transmission.

[0026] Meanwhile, multiple sets of the second temperature detection circuit are provided, each set connected to the same temperature expansion unit. As shown in the figure, multiple sets of the second temperature detection circuit can also be provided. The second set of second temperature detection circuits may include resistors R41 and R42 and capacitor C4. One end of resistor R41 is connected to VCC. The other end of resistor R41, one end of resistor R42, and one end of capacitor C4 form a node. One end of this node forms a third port A4, and the other end is connected to the temperature expansion unit 10. The third set of second temperature detection circuits may include resistors R51 and R52 and capacitor C5. One end of resistor R51 is connected to VCC. The other end of resistor R51, one end of resistor R52, and one end of capacitor C5 form a node. One end of this node forms a third port A5, and the other end is connected to the temperature expansion unit 10. The fourth port A4 and the fifth port A5 can be ports for microcontroller temperature detection and can be used for signal transmission.

[0027] The resistors R11, R21, R31, R41, and R51 are pull-up resistors, R12, R22, R32, R42, and R52 are thermistors to be tested, and C1, C2, C3, C4, and C5 are temperature detection filter capacitors.

[0028] The temperature expansion unit also includes a multiplexer (MUX). The third port A3 is connected to the multiplexer (MUX) of the temperature expansion unit and controls the opening and closing of the multiplexer (MUX). When multiple sets of second temperature detection circuits 22 are provided, the multiplexer (MUX) can be controlled to realize temperature detection of different second temperature detection circuits 22, thereby increasing the number of temperature detection channels.

[0029] In this embodiment, a resistor Rx is also included, with one end of Rx grounded and the other end connected to the temperature extension unit. The resistor Rx is also a thermistor that needs to be detected.

[0030] The working process of this invention is as follows:

[0031] 1. When the temperature detection channel required by the system is consistent with the temperature detection channel design of the temperature detection unit 20, the temperature detection unit 20 shall perform the temperature detection.

[0032] 2. When the number of temperature detection channels required by the system is greater than the number of temperature detection channels designed for temperature detection unit 20, an external temperature expansion unit 10 can be connected to expand the number of temperature channels.

[0033] 3. When the external temperature expansion unit 10 is connected, the resistors R3, R4, and R5 on the temperature expansion unit 10 are not used. At the same time, the third port A3, the fourth port A4, and the fifth port A5 can be configured from analog signal input to digital signal output and control the multiplexer MUX on the temperature expansion unit 10.

[0034] 4. As shown in the attached diagram, by connecting the third port A3, the fourth port A4, and the fifth port A5 to the temperature expansion unit 10, these three ports form a temperature detection channel. Through the original five temperature detection channels of the temperature detection unit 20, there can be eight temperature detection channels. At the same time, a multi-channel switch MUX can switch the eight thermistors to be connected in a time-sharing manner, thus expanding to eight temperature detection channels. Other channels can be expanded separately as needed.

[0035] Alternatively, a new temperature extension unit 10 can be connected to the second group of first temperature detection circuits to further increase the number of temperature detection channels. Preferably, it can be used in a battery system.

[0036] In summary, by connecting a temperature extension unit to the temperature detection unit, the temperature extension unit can utilize the existing temperature detection channel of the temperature detection unit without adding a new temperature detection unit. Thus, with minimal circuit modifications, it can achieve compatibility with the temperature detection channel of the existing battery management system, and at the same time, the functionality of the temperature detection channel can be expanded as needed.

[0037] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A circuit supporting the expansion of temperature detection channels, characterized in that, It includes a temperature extension unit (10) and a temperature detection unit (20). The temperature detection unit includes at least one set of first temperature detection circuits (21) and at least one set of second temperature detection circuits (22). The first temperature detection circuit is connected to the temperature extension unit, and the second temperature detection circuit is connected to the temperature extension unit. The first temperature detection circuit includes resistor R11, resistor R12 and capacitor C1. One end of resistor R11 is connected to VCC terminal. The other end of resistor R11, one end of resistor R12 and one end of capacitor C1 form a node. One end of the node forms a first port A1 and the other end is connected to the temperature extension unit. The second temperature detection circuit includes resistor R31, resistor R32 and capacitor C3. One end of resistor R31 is connected to VCC terminal. The other end of resistor R31, one end of resistor R32 and one end of capacitor C3 form a node. One end of the node forms a third port A3, and the other end is connected to the temperature extension unit. The temperature expansion unit also includes a multiplexer MUX, and the third port A3 is connected to the multiplexer MUX of the temperature expansion unit and controls the opening and closing of the multiplexer MUX; The resistor R12 is a thermistor, and the resistor R32 is a thermistor.

2. The circuit supporting temperature detection channel expansion according to claim 1, characterized in that, The first temperature detection circuit is provided in multiple groups, and each group of first temperature detection circuits is connected to one of the temperature extension units.

3. The circuit supporting temperature detection channel expansion according to claim 1, characterized in that, The second temperature detection circuit is provided in multiple groups, and each group of the second temperature detection circuit is connected to the temperature extension unit.

4. The circuit supporting temperature detection channel expansion according to claim 1, characterized in that, It also includes a resistor Rx, one end of which is grounded and the other end is connected to the temperature extension unit.

5. The circuit supporting temperature detection channel expansion according to claim 4, characterized in that, The resistor Rx is a thermistor.

Images