Temperature detection gating circuit and energy storage system

Abstract

The utility model relates to the technical field of energy storage power supplies, and mainly provides a temperature detection gating circuit and an energy storage system, the temperature detection gating circuit comprises at least two temperature acquisition ports and temperature detection modules correspondingly connected with the at least two temperature acquisition ports, the at least two temperature acquisition ports are used for acquiring the working temperatures of different branches in the working circuit, the temperature detection module comprises a temperature detection unit and a judgment unit, and the temperature detection module configures the output voltage of the temperature detection unit to change along with the acquired working temperatures; therefore, the temperatures of different branches in the working circuit are detected in real time, high-temperature early warning is triggered in time when the temperature is abnormal, and the safety of the energy storage system is improved. Meanwhile, whether the output voltage is abnormal or not is judged based on the judgment unit, so that an error prompt is triggered when the output voltage is abnormal, whether an error occurs in the circuit or not is determined in time, and the safety and stability of the energy storage system are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage power supplies, in particular to a temperature detection gating circuit and an energy storage system.

Background Art

[0002] When an energy storage product performs AC output, to ensure safety during use, when the temperature at the detection point reaches a set value, the energy storage product will trigger an over-temperature protection mechanism, turn off the AC output and give an alarm to remind the user that the product temperature is too high and the device needs to be paused to cool down.

[0003] However, in the circuit design of energy storage products, to comprehensively grasp the operating state of the device, an I / O port is independently allocated for each path to detect the temperature of multiple paths, but this is often difficult to achieve in actual design, which will not only increase costs but also occupy a large amount of chip resources.

[0004] Therefore, the gating circuit has become an effective solution to this problem. However, in the production process of the existing gating circuit, if the thermistor is not attached or burned out and disconnected, the gating circuit cannot detect the circuit temperature, and the system will still operate normally, unable to trigger over-temperature protection, thus reducing the safety of the energy storage system.

Summary of the Utility Model

[0005] The embodiments of the utility model provide a temperature detection gating circuit and an energy storage system, aiming to solve the technical problem of low safety of energy storage in the prior art.

[0006] To solve the above technical problem, one technical solution adopted in the embodiments of the utility model is: to provide a temperature detection gating circuit, the temperature detection gating circuit includes at least two temperature acquisition ports, at least two groups of temperature detection modules and an output module;

[0007] The at least two temperature acquisition ports are correspondingly connected to the at least two groups of temperature detection modules, the at least two groups of temperature detection modules are also connected to the output module, the output module is used to be connected to a controller, and the at least two temperature acquisition ports are used to acquire the operating temperatures of different branches in the working circuit;

[0008] Each temperature detection module includes a temperature detection unit and a judgment unit, the temperature detection unit is respectively connected to the temperature acquisition port and the output module, the judgment unit is respectively connected to the temperature detection unit and the output module, and the temperature detection unit is used to output a first voltage signal according to the operating temperature;

[0009] The judgment unit is used to judge whether the first voltage signal is greater than a preset threshold, and when the first voltage signal is greater than the preset threshold, output a second voltage signal;

[0010] The output module responds to the first voltage signals output by the at least two groups of temperature detection modules, and outputs the first voltage signal with the minimum voltage value among the multiple first voltage signals to the controller, so that the controller performs operating temperature detection based on the first voltage signal with the minimum voltage value; and

[0011] Outputs the second voltage signal output by the judgment unit to the controller to trigger an error prompt.

[0012] Optionally, the temperature detection unit includes a voltage-dividing resistor and a thermistor;

[0013] The voltage-dividing resistor is connected to a first power supply, the voltage-dividing resistor is connected in series with the thermistor, and the voltage-dividing resistor is also connected to the output module and the judgment unit respectively;

[0014] The voltage-dividing resistor responds to the resistance ratio between the voltage-dividing resistor and the thermistor, and outputs a first voltage signal based on the resistance ratio;

[0015] The resistance value of the thermistor responds to the change of the operating temperature, and changes the magnitude of the first voltage signal based on the changed resistance value.

[0016] Optionally, the judgment unit includes a judgment sub-unit and a control sub-unit;

[0017] The judgment sub-unit is connected to the temperature detection unit, the judgment sub-unit is also connected to the control sub-unit, and the control sub-unit is connected to the output module;

[0018] The judgment sub-unit is used to judge whether the first voltage signal is greater than a preset threshold value, and when the first voltage signal is greater than the preset threshold value, outputs a control signal to the control sub-unit, so that the control sub-unit outputs a second voltage signal to the output module.

[0019] Optionally, the judgment sub-unit includes a voltage stabilizing diode DZ1;

[0020] The cathode of the voltage stabilizing diode DZ1 is connected to the temperature detection unit, and the anode of the voltage stabilizing diode DZ1 is connected to the control sub-unit.

[0021] Optionally, the control sub-unit includes a switching transistor Q1 and a resistor R3;

[0022] The control end of the switching transistor Q1 is connected to the anode of the voltage stabilizing diode DZ1, the control end of the switching transistor Q1 is also connected to the second end of the switching transistor Q1 through the resistor R3, the first end of the switching transistor Q1 is connected to the output module, and the second end of the switching transistor Q1 is used for grounding.

[0023] Optionally, the temperature detection module further includes a signal stabilization unit;

[0024] The signal stabilization unit is respectively connected to the temperature detection unit and the output module;

[0025] The signal stabilization unit is used to stably output the first voltage signal output by the temperature detection unit to the output module.

[0026] Optionally, the signal stabilization unit includes a voltage follower U1;

[0027] The positive input terminal of the voltage follower U1 is connected to the temperature detection unit, the negative input terminal of the voltage follower U1 is connected to the output terminal of the voltage follower U1, and the output terminal of the voltage follower U1 is connected to the output module.

[0028] Optionally, the output module includes a resistor R2;

[0029] The resistor R2 is connected to a first power supply, and the resistor R2 is also respectively connected to the at least two groups of temperature detection modules and the controller.

[0030] Optionally, the thermistor is a negative temperature coefficient thermistor.

[0031] To solve the above technical problems, another technical solution adopted in the embodiments of the present invention is: to provide an energy storage system, the energy storage system includes:

[0032] A controller;

[0033] A working circuit;

[0034] And, the temperature detection and gating circuit as described above, wherein the temperature detection and gating circuit is respectively connected to the controller and the working circuit.

[0035] Different from the related art, the present invention provides a temperature detection and gating circuit and an energy storage system. The temperature detection and gating circuit includes at least two temperature acquisition ports, at least two groups of temperature detection modules and an output module. The at least two temperature acquisition ports are correspondingly connected to the at least two groups of temperature detection modules. The at least two groups of temperature detection modules are also connected to the output module. The output module is used to be connected to a controller. The at least two temperature acquisition ports are used to acquire the working temperatures of different branches in the working circuit. The temperature detection module includes a temperature detection unit and a judgment unit. The temperature detection unit is respectively connected to the temperature acquisition port and the output module. The judgment unit is respectively connected to the temperature detection unit and the output module.

[0036] The temperature detection module configures the output voltage of the temperature detection unit to change following the collected operating temperature, so as to detect the temperatures of different branches in the working circuit in real time, trigger a high-temperature warning in case of abnormal temperature, and thus improve the safety of the energy storage system. Meanwhile, based on the judgment unit, it judges whether the output voltage is abnormal, triggers an error prompt in case of abnormality, and thus timely determines whether there is an error in the circuit, further enhancing the safety and stability of the energy storage system.

Description of the Drawings

[0037] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the figures do not constitute a proportional limitation.

[0038] Figure 1 is the application scenario provided by the embodiment of the present invention;

[0039] Figure 2 is the structural block diagram of a temperature detection gating circuit provided by the embodiment of the present invention;

[0040] Figure 3 is the structural block diagram of a temperature detection module provided by the embodiment of the present invention

[0041] Figure 4 is the circuit diagram of a temperature detection module provided by the embodiment of the present invention;

[0042] Figure 5 is the circuit diagram of a temperature detection gating circuit provided by the embodiment of the present invention.

Detailed Embodiments

[0043] In order to make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The technical features involved in the various embodiments of the present application described below do not conflict with each other and can be combined with each other.

[0045] When an element is expressed as "connected" to another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween.

[0046] In the description and claims of the present utility model, terms such as "first", "second", etc. are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or more.

[0047] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0048] Please refer to Figure 1 , Figure 1 which is the application scenario provided by the embodiment of the present utility model. As Figure 1 shown, the application scenario includes an energy storage system 1 and a load 2, and the energy storage system 1 is connected to the load 2. The energy storage system 1 is used to output alternating current to the load 2 to provide a working voltage for the load 2.

[0049] Furthermore, as Figure 1As shown, the energy storage system 1 includes a controller 100, a working circuit 200, and a temperature detection and selection circuit 300. The temperature detection and selection circuit 300 is respectively connected to the controller 100 and the working circuit 200, and the working circuit 200 is also respectively connected to the controller 100 and the load 2. Among them, the working circuit 200 includes several branches 201. When the energy storage system 1 supplies power to the load 2, the controller 100 will control the working circuit 200 to start working. After the working circuit 200 starts working, the devices on the several branches 201 are in a working state, so as to output alternating current to the load 2. When the several branches 201 are in a working state, the temperature detection and selection circuit 300 will also detect the working temperature of each branch 201 in the working circuit 200 in real time, and output a corresponding voltage signal based on the working temperature of each branch 201, and finally output the voltage signal with the smallest voltage value among all the voltage signals to the controller 100. When the controller 100 receives the voltage signal with the smallest voltage value, it will judge whether the voltage signal is less than a preset voltage value. If the voltage value of the voltage signal is less than the preset voltage value, it is considered that there is an abnormal temperature in a branch 201 in the working circuit 200, so as to trigger a temperature warning to prompt the user that there is a branch with abnormal temperature in the working circuit 200. Based on this, the temperature anomaly situation of the energy storage system 1 can be detected in real time, thus improving the safety of the energy storage system. And by synchronously detecting different branches through the temperature detection and selection circuit 300, it is avoided to use more detection ports to detect the temperatures of different branches, thus saving resources and reducing the cost of the energy storage system 1.

[0050] In some embodiments, please refer to Figure 2 , Figure 2 which is a structural block diagram of a temperature detection and selection circuit provided by an embodiment of the present invention. As Figure 2 shown, the temperature detection and selection circuit 300 includes at least two temperature acquisition ports 10, at least two groups of temperature detection modules 20, and an output module 30;

[0051] The at least two temperature acquisition ports 10 are correspondingly connected to the at least two groups of temperature detection modules 20, the at least two groups of temperature detection modules 20 are also connected to the output module 30, the output module 30 is used to be connected to the controller 100, and the at least two temperature acquisition ports 10 are used to acquire the working temperatures of different branches 201 in the working circuit 200.

[0052] Specifically, the at least two temperature acquisition ports 10 are correspondingly connected to several branches 201 in the working circuit 200. When the energy storage system 1 supplies power to the load 2, the at least two temperature acquisition ports 10 will collect the working temperature of the corresponding branch 201 in real time, and input the working temperature into the corresponding temperature detection module 20, so that the temperature detection module 20 converts the working temperature into a corresponding voltage signal and outputs it to the output module 30. When the output module 30 receives the voltage signals output by the at least two groups of temperature detection modules 20, it will obtain the voltage signal with the smallest voltage value among the voltage signals output by the at least two groups of temperature detection modules 20, and output the voltage signal with the smallest voltage value to the controller 100, so that the controller 100 determines whether the voltage signal with the smallest voltage value is less than a preset voltage value, thereby determining whether to trigger a temperature warning.

[0053] In yet another embodiment, please refer to Figure 3 , Figure 3 which is a structural block diagram of a temperature detection module provided by an embodiment of the present invention. As Figure 3 shown, each temperature detection module 20 includes a temperature detection unit 21 and a judgment unit 22; the temperature detection unit 21 is respectively connected to the temperature acquisition port 10 and the output module 30, the judgment unit 22 is respectively connected to the temperature detection unit 21 and the output module 30, and the temperature detection unit 21 is used to output a first voltage signal according to the working temperature;

[0054] The judgment unit 22 is used to judge whether the first voltage signal is greater than a preset threshold, and output a second voltage signal when the first voltage signal is greater than the preset threshold;

[0055] The output module 30 responds to the first voltage signals output by the at least two groups of temperature detection modules, and outputs the first voltage signal with the smallest voltage value among the multiple first voltage signals to the controller 100, so that the controller 100 performs working temperature detection based on the first voltage signal with the smallest voltage value; and

[0056] outputs the second voltage signal output by the judgment unit 22 to the controller 100 to trigger an error prompt.

[0057] It can be known that the temperature detection unit 21 is mainly used to receive the working temperature output by the temperature acquisition port 10, and output a first voltage signal to the output module 30 based on the working temperature, so that the output module 30 outputs the first voltage signal with the minimum voltage value to the controller 100, so that the controller 100 performs working temperature detection based on the first voltage signal with the minimum voltage value, and then determines whether the working circuit 200 has a temperature anomaly according to the working temperature detection result. However, when the first voltage signal is output through the temperature detection unit 21, if the temperature detection unit 21 fails, it will cause an incorrect first voltage signal to be output to the controller 100, so that the controller 100 has a detection error when performing working temperature detection. Therefore, in this application, a judgment unit 22 is introduced. The judgment unit 22 detects whether the first voltage signal is greater than a preset threshold, so as to determine whether the first voltage signal output by the voltage detection unit 21 is abnormal, and when the first voltage signal is abnormal, outputs a second voltage signal to the controller 100, so that the controller 100 triggers an error prompt based on the second voltage signal. Based on this, the user can be prompted that the temperature detection module 20 in the temperature detection gating circuit 300 fails, thereby improving the safety and stability of the energy storage system 1.

[0058] In some embodiments, please refer to Figure 4 , Figure 4 is a circuit diagram of a temperature detection module provided by an embodiment of the present invention. As Figure 4 shown, the temperature detection module 20 includes a voltage dividing resistor R1 and a thermistor RT1;

[0059] The voltage dividing resistor R1 is connected to a first power supply. The voltage dividing resistor R1 is connected in series with the thermistor RT1. The voltage dividing resistor R1 is also connected to the output module 30 and the judgment unit 22 respectively;

[0060] The voltage dividing resistor R1 responds to the resistance ratio between the voltage dividing resistor R1 and the thermistor RT1, and outputs a first voltage signal based on the resistance ratio;

[0061] The resistance value of the thermistor RT1 responds to the change of the working temperature, and changes the magnitude of the first voltage signal based on the changed resistance value.

[0062] Specifically, the thermistor RT1 is used to connect to the branch 201 through the temperature acquisition port 10, and the resistance value of the thermistor RT1 changes with the temperature change of the branch 201. When the temperature of the branch 201 is normal, the thermistor RT1 and the voltage dividing resistor R1 normally divide the voltage output by the first power supply, thereby outputting a first voltage signal. When the temperature of the branch 201 changes, the resistance value of the thermistor RT1 also changes, so that the resistance ratio between the thermistor RT1 and the voltage dividing resistor R1 also changes, resulting in a change in the voltage division value on the thermistor RT1, and further changing the magnitude of the first voltage signal.

[0063] In some embodiments, the thermistor RT1 is a negative temperature coefficient thermistor. That is, the resistance value of the thermistor RT1 decreases as the temperature increases. When the temperature of the branch 201 rises, the resistance value of the thermistor RT1 decreases, so that the voltage division value of the thermistor RT1 becomes lower, and further the magnitude of the first voltage signal also becomes lower. Based on this, when the controller 100 detects that the first voltage signal is lower than the preset voltage value, it can be determined that the temperature of the branch 201 has abnormally increased, thereby realizing real-time monitoring of the temperature of each branch in the working circuit 200, and further improving the safety of the energy storage system.

[0064] In another embodiment, as Figure 3 shown, the judging unit 22 includes a judging sub-unit 221 and a control sub-unit 222;

[0065] The judging sub-unit 221 is connected to the temperature detecting unit 21, the judging sub-unit 221 is also connected to the control sub-unit 222, and the control sub-unit 222 is connected to the output module 30;

[0066] The judging sub-unit 221 is used to judge whether the first voltage signal is greater than a preset threshold, and when the first voltage signal is greater than the preset threshold, output a control signal to the control sub-unit 222, so that the control sub-unit 22 outputs a second voltage signal to the output module 30.

[0067] It can be known that the preset threshold is set based on the voltage value of the first power supply and the resistance value of the voltage-dividing resistor R1. When the thermistor RT1 is in a normal state, the thermistor RT1 and the voltage-dividing resistor R1 divide the voltage normally, so that the first voltage signal is less than the preset threshold, and further enables the controller 100 to determine whether there is an abnormal temperature condition in the branch 201 based on the first voltage signal. When the thermistor RT1 fails, the thermistor RT1 does not participate in voltage division, so that the voltage of the first power supply is directly input to the judgment subunit 221, resulting in the judgment subunit 221 outputting a control signal to the control subunit 222, and further outputting a second voltage signal to the controller 100 to trigger an error prompt. Based on this, the judgment unit 21 can be used to detect in real time whether the thermistor RT1 fails, thereby improving the accuracy of branch temperature detection and further improving the stability of the energy storage system.

[0068] In some embodiments, as Figure 4 shown, the judgment subunit 221 includes a zener diode DZ1; the control subunit 222 includes a switching transistor Q1 and a resistor R3;

[0069] The cathode of the zener diode DZ1 is connected to the temperature detection unit 21, and the anode of the zener diode DZ1 is connected to the control subunit 222.

[0070] The control terminal of the switching transistor Q1 is connected to the anode of the zener diode DZ1, and the control terminal of the switching transistor Q1 is also connected to the second terminal of the switching transistor Q1 through the resistor R3. The first terminal of the switching transistor Q1 is connected to the output module 30, and the second terminal of the switching transistor Q1 is used for grounding.

[0071] Specifically, when the temperature detection unit 21 outputs a first voltage signal based on the temperature of the branch 201, the first voltage signal will be input to the cathode of the zener diode DZ1. If the first voltage signal is greater than the zener voltage value of the zener diode DZ1, the zener diode DZ1 will be broken down. When the zener diode DZ1 is broken down, the switching transistor Q1 is also turned on, so that the voltage of the output module 30 is pulled down (that is, a second voltage signal is output). Further, the controller 100 recognizes the second voltage signal, thereby triggering an error warning.

[0072] It should be noted that the voltage stabilizing diode DZ1 is mainly used to determine whether the thermistor RT1 fails. When the thermistor RT1 fails (such as being damaged or missing), the thermistor RT1 will become ineffective. At this time, the thermistor RT1 will not participate in voltage division. Even if the temperature in the branch 201 is abnormal, the voltage of the first power supply will directly output (the first voltage signal) through the voltage dividing resistor R1. If there is no judgment unit 22, it will cause the first voltage signal to be directly output to the controller 100, resulting in misjudgment. Therefore, by introducing the voltage stabilizing diode DZ1, when the thermistor RT1 fails, the voltage output by the first power supply will break down the voltage stabilizing diode DZ1 through the voltage dividing resistor R1, so that the output module 30 outputs a second voltage signal to the controller 100, thereby triggering an error prompt. Based on this, when the thermistor fails, the user can be reminded in time, thus improving the safety of the energy storage system. It can be known that the voltage stabilizing value of the voltage stabilizing diode DZ1 is set based on the voltage value of the first power supply and the resistance value of the resistor R1.

[0073] In another embodiment, as Figure 3 shown, the temperature detection module 20 further includes a signal stabilizing unit 23;

[0074] The signal stabilizing unit 23 is respectively connected to the temperature detection unit 21 and the output module 30;

[0075] The signal stabilizing unit 23 is used to stably output the first voltage signal output by the temperature detection unit 21 to the output module 30.

[0076] It should be noted that since the first voltage signal is determined by the resistance value of the thermistor RT1, and the resistance value of the thermistor RT1 changes in real time with temperature, that is, the first voltage signal is unstable. Therefore, when outputting the first voltage signal to the output module 30, the first voltage signal is output through the signal stabilizing unit 23, thereby improving the stability of the signal.

[0077] Further, please refer to Figure 4 , the signal stabilizing unit 23 includes a voltage follower U1;

[0078] The positive input terminal of the voltage follower U1 is connected to the temperature detection unit 21, the negative input terminal of the voltage follower U1 is connected to the output terminal of the voltage follower U1, and the output terminal of the voltage follower U1 is connected to the output module 30.

[0079] It should be noted that the output voltage of the voltage follower can quickly and accurately follow the change of the input voltage. The first voltage signal is output through the voltage follower U1, thereby improving the stability of the first voltage signal.

[0080] In another embodiment, as Figure 4 shown, the output module 30 includes a resistor R2; the resistor R2 is connected to the first power supply, and the resistor R2 is also respectively connected to the at least two groups of temperature detection modules 20 and the controller 100. Optionally, the voltage of the first power supply is 3.3V.

[0081] In some embodiments, please refer to Figure 5 , Figure 5 is the circuit diagram of a temperature detection gating circuit provided by an embodiment of the present invention. As Figure 5 shown, Figure 5 exemplarily provides three groups of temperature detection modules 20. The three groups of temperature detection modules 20 are respectively used to detect the temperatures of different branches 201. For example, Figure 5 the first temperature detection module 20 in Figure 5 detects the temperature of the first branch as T1, the second temperature detection module 20 detects the temperature of the second branch as T2, and the temperature detected by the third temperature detection module 20 is T3. When the three groups of temperature detection modules 20 are not working, the resistor R2 will output a corresponding voltage signal to the controller 100 based on the voltage of the first power supply. Among them, the temperature detection gating circuit 300 is connected to the controller 100 through

[0082] In another embodiment, as Figure 3 shown, the temperature detection module 20 further includes an anti-backflow unit 24. The anti-backflow unit 24 is respectively connected to the signal stabilization unit 23 and the output module 30. The anti-backflow unit 24 is used to prevent the output voltage from flowing into the controller 100 when the output voltage of the signal stabilization unit 23 is too large, thereby protecting the controller 100 from being damaged.

[0083] Specifically, please refer to Figure 4, the anti-backflow unit 24 includes a diode D1, the cathode of the diode D1 is connected to the output terminal of the voltage follower U1, and the anode of the diode D1 is connected to the controller 100.

[0084] It should be noted that, please combine Figure 4 and Figure 5 , since the anode of the diode D1 is connected to the first power supply through a resistor R2, and based on the unidirectional conductivity of the diode, it can be known that only when the output voltage of the voltage follower U1 is less than the voltage of the resistor R2, the diode D1 is in the conducting state, and the first voltage signal output by the temperature detection unit 21 can be output to the controller 100. Therefore, when the output voltage of the voltage follower U1 is greater than the voltage of the first power supply, the diode D1 is in the cut-off state, thereby achieving the purpose of preventing backflow.

[0085] The present invention provides a temperature detection gating circuit, which includes at least two temperature acquisition ports, at least two groups of temperature detection modules and an output module. The at least two temperature acquisition ports are correspondingly connected to the at least two groups of temperature detection modules. The at least two groups of temperature detection modules are also connected to the output module. The output module is used to be connected to a controller. The at least two temperature acquisition ports are used to acquire the operating temperatures of different branches in the working circuit. The temperature detection module includes a temperature detection unit and a judgment unit. The temperature detection unit is respectively connected to the temperature acquisition port and the output module. The judgment unit is respectively connected to the temperature detection unit and the output module.

[0086] The temperature detection module configures the output voltage of the temperature detection unit to change following the acquired operating temperature, so as to detect the temperatures of different branches in the working circuit in real time, trigger a high-temperature warning in time when the temperature is abnormal, thereby improving the safety of the energy storage system. At the same time, based on the judgment unit to judge whether the output voltage is abnormal, and trigger an error prompt when it is abnormal, so as to determine whether there is an error in the circuit in time, and further improve the safety and stability of the energy storage system.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of brevity, they are not provided in detail; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

1. A temperature detection and gating circuit, characterized in that The temperature detection gating circuit includes at least two temperature acquisition ports, at least two groups of temperature detection modules, and an output module; The at least two temperature acquisition ports are correspondingly connected to the at least two groups of temperature detection modules. The at least two groups of temperature detection modules are also connected to the output module. The output module is used to be connected to a controller. The at least two temperature acquisition ports are used to acquire the working temperatures of different branches in the working circuit; Each of the temperature detection modules includes a temperature detection unit and a judgment unit. The temperature detection unit is respectively connected to the temperature acquisition port and the output module. The judgment unit is respectively connected to the temperature detection unit and the output module. The temperature detection unit is used to output a first voltage signal according to the working temperature; The judgment unit is used to judge whether the first voltage signal is greater than a preset threshold, and when the first voltage signal is greater than the preset threshold, output a second voltage signal; The output module responds to the first voltage signals output by the at least two groups of temperature detection modules, and outputs the first voltage signal with the smallest voltage value among the multiple first voltage signals to the controller, so that the controller performs working temperature detection based on the first voltage signal with the smallest voltage value; And Output the second voltage signal output by the judgment unit to the controller to trigger an error prompt.

2. The temperature detection gating circuit according to claim 1, wherein The temperature detection unit includes a voltage dividing resistor and a thermistor; The voltage dividing resistor is connected to a first power supply. The voltage dividing resistor is connected in series with the thermistor. The voltage dividing resistor is also respectively connected to the output module and the judgment unit; The voltage dividing resistor responds to the resistance ratio between the voltage dividing resistor and the thermistor, and outputs a first voltage signal based on the resistance ratio; The resistance value of the thermistor responds to the change of the working temperature, and changes the magnitude of the first voltage signal based on the changed resistance value.

3. The temperature detection gating circuit according to claim 1, characterized in that The judgment unit includes a judgment subunit and a control subunit; The judgment subunit is connected to the temperature detection unit. The judgment subunit is also connected to the control subunit. The control subunit is connected to the output module; The judgment subunit is used to judge whether the first voltage signal is greater than a preset threshold, and when the first voltage signal is greater than the preset threshold, output a control signal to the control subunit, so that the control subunit outputs a second voltage signal to the output module.

4. The temperature detection gating circuit according to claim 3, wherein, The judgment subunit includes a voltage stabilizing diode DZ1; The cathode of the voltage stabilizing diode DZ1 is connected to the temperature detection unit. The anode of the voltage stabilizing diode DZ1 is connected to the control subunit.

5. The temperature detection strobe circuit according to claim 4, wherein, The control subunit includes a switching transistor Q1 and a resistor R3; The control end of the switching transistor Q1 is connected to the anode of the voltage stabilizing diode DZ1. The control end of the switching transistor Q1 is also connected to the second end of the switching transistor Q1 through the resistor R3. The first end of the switching transistor Q1 is connected to the output module. The second end of the switching transistor Q1 is used to be grounded.

6. The temperature detection strobe circuit according to claim 1, wherein The temperature detection module further includes a signal stabilizing unit; The signal stabilizing unit is respectively connected to the temperature detection unit and the output module; The signal stabilization unit is used to stably output the first voltage signal output by the temperature detection unit to the output module.

7. The temperature detection gating circuit according to claim 6, characterized in that, The signal stabilization unit includes a voltage follower U1; The positive input terminal of the voltage follower U1 is connected to the temperature detection unit, the negative input terminal of the voltage follower U1 is connected to the output terminal of the voltage follower U1, and the output terminal of the voltage follower U1 is connected to the output module.

8. The temperature detection gating circuit according to any one of claims 1-7, characterized in that The output module includes a resistor R2; The resistor R2 is connected to the first power supply, and the resistor R2 is also connected to the at least two groups of temperature detection modules and the controller respectively.

9. The temperature detection gating circuit according to claim 2, wherein The thermistor is a negative temperature coefficient thermistor.

10. A energy storage system, characterized in that, The energy storage system includes: A controller; A working circuit; And, the temperature detection and gating circuit according to any one of claims 1-9, wherein the temperature detection and gating circuit is connected to the controller and the working circuit respectively.

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