Wiring condition detection circuit, battery pack and energy storage device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN POWEROAK NEWENER CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-07-03
Smart Images
Figure CN224456977U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of energy storage technology, specifically to a wiring condition detection circuit, a battery pack, and an energy storage device. Background Technology
[0002] With the widespread application and continuous development of battery technology, battery packs, as key components for energy storage and supply, are widely used in energy storage systems and many other fields.
[0003] Currently, in the home energy storage sector, home energy storage products typically require manual installation by after-sales personnel. These products usually feature high voltage and large capacity, making accurate wiring extremely critical. Short circuits or reverse connections during wiring can lead to a series of serious consequences, potentially causing battery overheating, fires, or even explosions. This not only damages the home energy storage product itself but also poses a serious threat to other electrical appliances in the home and the lives of people, resulting in significant economic losses and safety risks for users.
[0004] Therefore, in order to ensure the safe and stable operation of home storage systems, how to effectively detect the wiring conditions during wiring has become a technical problem that urgently needs to be solved in this field. Utility Model Content
[0005] This application provides a wiring condition detection circuit, a battery pack, and an energy storage device, which can detect whether the wiring is correct during the battery pack wiring process.
[0006] In a first aspect, embodiments of this application provide a wiring condition detection circuit applied to a battery pack, the battery pack including a first positive terminal and a first negative terminal; the wiring condition detection circuit includes: a first power supply, a control module, a voltage detection module, and a switch module; the first power supply is connected to a first terminal of the switch module, a second terminal of the switch module is connected to the first positive terminal and the first terminal of the voltage detection module, a second terminal of the voltage detection module is connected to a first terminal of the control module, and a second terminal of the control module is connected to a third terminal of the switch module; the voltage detection module is configured to detect the voltage of the first positive terminal; the control module is configured to control the switch module to be turned on or off to establish or disconnect the connection between the first power supply and the first positive terminal; the control module is further configured to determine the wiring condition of the battery pack based on the voltage after the switch module is turned on and the first positive terminal is connected, wherein the wiring condition includes positive connection, reverse connection, and external short connection.
[0007] In one or more embodiments, the switching module includes a first switching unit, a second switching unit, and a third switching unit; a first end of the first switching unit is connected to a second end of the control module, a second end of the first switching unit is connected to a first end of the second switching unit, a second end of the second switching unit is used to connect to a second power supply, a third end of the second switching unit is connected to a first end of the third switching unit, a second end of the third switching unit is connected to the first power supply, and a third end of the third switching unit is connected to the first positive terminal and a first end of the voltage detection module; wherein, the control module is configured to control the first switching unit to be turned on or off; in response to the first switching unit being turned on, the second switching unit and the third switching unit are turned on; in response to the first switching unit being turned off, the second switching unit and the third switching unit are turned off.
[0008] In one or more embodiments, the first switching unit includes a first resistor, a second resistor, and a first switch; a first end of the first resistor is connected to a second end of the control module, a second end of the first resistor is connected to a first end of the first switch and a first end of the second resistor, a second end of the first switch is connected to a first end of the second switching unit, and a third end of the first switch and a second end of the second resistor are grounded.
[0009] In one or more embodiments, the second switching unit includes a third resistor and an isolating switch; the first end of the third resistor is used to connect to the second power supply, the input end of the isolating switch is located between the second end of the third resistor and the second end of the first switching unit, and the output end of the isolating switch is located between the first end of the third switching unit and ground.
[0010] In one or more embodiments, the third switching unit includes a fourth resistor, a fifth resistor, a sixth resistor, and a second switch; a first end of the second switch is connected to a first end of the fourth resistor and the first power supply; a second end of the second switch is connected to a first end of the fifth resistor; a second end of the fifth resistor is connected to the first positive terminal and the first end of the voltage detection module; a third end of the second switch is connected to a second end of the fourth resistor and the first end of the sixth resistor; and a second end of the sixth resistor is connected to a third end of the second switching unit.
[0011] In one or more embodiments, the wiring condition detection circuit further includes an anti-backflow module; the first end of the anti-backflow module is connected to the second end of the switch module, and the second end of the anti-backflow module is connected to the first positive terminal and the first end of the voltage detection module.
[0012] In one or more embodiments, the anti-backflow module includes a diode; the anode of the diode is connected to the second terminal of the switching module, and the cathode of the diode is connected to the first positive terminal and the first terminal of the voltage detection module.
[0013] Secondly, embodiments of this application provide a battery pack, which includes a first positive terminal, a first negative terminal, and a wiring condition detection circuit as described in any embodiment of the first aspect; the first positive terminal is connected to the wiring condition detection circuit, and the first positive terminal and the first negative terminal are used to connect to an energy storage converter.
[0014] Thirdly, embodiments of this application provide an energy storage device, which includes: an energy storage converter and a battery pack as described in any of the second aspects; the battery pack is connected to the energy storage converter.
[0015] In one or more embodiments, the energy storage converter includes a second positive terminal, a second negative terminal, a bus capacitor, and a step-up / step-down circuit; the second positive terminal is connected to the bus capacitor and the step-up / step-down circuit, and the second positive terminal and the second negative terminal are connected to the battery pack.
[0016] The beneficial effects of this application are as follows: This application provides a wiring condition detection circuit, a battery pack, and an energy storage device, including: a first power supply, a control module, a voltage detection module, and a switch module; the first power supply is connected to a first terminal of the switch module, the second terminal of the switch module is connected to a first positive terminal and the first terminal of the voltage detection module, the second terminal of the voltage detection module is connected to a first terminal of the control module, and the second terminal of the control module is connected to a third terminal of the switch module; the voltage detection module is configured to detect the voltage of the first positive terminal; the control module is configured to control the switch module to be turned on or off to establish or disconnect the connection between the first power supply and the first positive terminal; the control module is also configured to determine the wiring condition of the battery pack based on the voltage after the switch module is turned on and the first positive terminal is connected, wherein the wiring condition includes positive connection, reverse connection, and external short circuit. This circuit obtains the voltage of the first positive terminal after connection through the voltage detection module and determines the wiring condition based on the voltage of the first positive terminal, realizing the detection of the wiring condition of the external power line and improving the safety and reliability of the wiring process. Attached Figure Description
[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0018] Figure 1 A structural block diagram of an energy storage device provided in an embodiment of this application;
[0019] Figure 2 This is a partial structural diagram of an energy storage converter provided in an embodiment of this application;
[0020] Figure 3 A structural block diagram of another energy storage device provided in the embodiments of this application;
[0021] Figure 4 A structural block diagram of a wiring condition detection circuit provided in an embodiment of this application;
[0022] Figure 5 A voltage curve diagram of a first positive terminal provided in an embodiment of this application;
[0023] Figure 6 A structural block diagram of another wiring condition detection circuit provided in an embodiment of this application;
[0024] Figure 7 A structural diagram of a wiring condition detection circuit provided in an embodiment of this application;
[0025] Figure 8 This is a structural block diagram of another wiring condition detection circuit provided in an embodiment of this application. Detailed Implementation
[0026] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "electrically connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. Furthermore, technical features involved in the different embodiments of this application described below may be combined with each other as long as they do not conflict with each other.
[0028] This application provides an energy storage device, see the following embodiments. Figure 1 The energy storage device 1000 includes a power conversion system (PCS) 100 and a battery pack 200. The power conversion system 100 is connected to the battery pack 200.
[0029] Energy storage equipment 1000 includes energy storage equipment such as household energy storage equipment.
[0030] The energy storage converter 100 can convert direct current to alternating current or vice versa to enable the charging and discharging of the energy storage device 1000.
[0031] In some embodiments, see Figure 2 The energy storage converter 100 includes a second positive terminal P+, a second negative terminal P-, a bus capacitor C1, and a step-up / step-down circuit 110. The second positive terminal P+ is connected to the bus capacitor C1 and the step-up / step-down circuit 110. For details, please refer to [link to relevant documentation]. Figure 2 The step-up / step-down circuit 110 includes resistor R7, NMOS transistor Q3, resistor R8, NMOS transistor Q4, resistor R9, and inductor L1. The first terminal of resistor R7 is connected to the second negative terminal P-, the first terminal of bus capacitor C1, the source of NMOS transistor Q3, and the first terminal of resistor R8. The second terminal of resistor R7 is connected to the gate of NMOS transistor Q3. The drain of NMOS transistor Q3 is connected to the first terminal of inductor L1, the first terminal of resistor R9, and the source of NMOS transistor Q4. The gate of NMOS transistor Q4 is connected to the second terminal of resistor R9, and the drain of NMOS transistor Q4 is connected to the second terminal of resistor R8. The second terminal of inductor L1 is connected to the second positive terminal P+. The bus capacitor can have a capacitance of 4mF. It should be noted that... Figure 2 The circuit structure shown is a partial circuit structure of the energy storage converter 100, and does not represent the complete circuit structure of the energy storage converter 100.
[0032] In some embodiments, the battery pack 200 includes a battery management system (BMS) and multiple battery modules. The battery modules are connected to the BMS, and the BMS is connected to the energy storage inverter 100. A battery module includes multiple cells connected in parallel, series, or a combination thereof for storing and providing electrical energy. The combination thereof includes both series and parallel connections. The battery pack 200 also includes a first positive terminal B+ and a first negative terminal B-, where the first positive terminal B+ is the positive terminal of the battery pack 200, and the first negative terminal B- is the negative terminal of the battery pack 200.
[0033] In this energy storage device 1000, the number of battery packs 200 is one, two, or more, and the multiple battery packs 200 are connected in parallel. Specifically, when the energy storage device 1000 is configured with a single battery pack 200, this battery pack 200 is directly connected to the energy storage converter 100 as the main pack, such as... Figure 1 As shown, when the energy storage device 1000 is configured with two or more battery packs 200, one battery pack 200 is connected to the energy storage converter 100 as the master pack, and the remaining battery packs 200 are connected in parallel with the master pack as slave packs, as shown. Figure 3 As shown. When the main battery pack is connected to the energy storage converter 100, and when the slave battery pack is connected in parallel with the main battery pack, the connection is established through the corresponding power lines. For some types of energy storage devices 1000, such as residential energy storage devices, wiring is usually required by after-sales personnel. During the wiring process of the battery pack 200, there are three wiring conditions: positive connection, reverse connection, and external short circuit. For the positive connection condition, refer to... Figure 1 The first positive terminal B+ of the battery pack 200 is connected to the second positive terminal P+ of the energy storage converter 100 via a power line, and the first negative terminal B- of the battery pack 200 is connected to the second negative terminal P- of the energy storage converter 100 via a power line. In reverse connection mode, the first positive terminal B+ of the battery pack 200 is connected to the second negative terminal P- of the energy storage converter 100 via a power line, and the first negative terminal B- of the battery pack 200 is connected to the second positive terminal P+ of the energy storage converter 100 via a power line. In external short-circuit connection mode, the first positive terminal B+, the first negative terminal B- of the battery pack 200, the second positive terminal P+ of the energy storage converter 100, and the second negative terminal P- of the energy storage converter 100 are all short-circuited. Since home energy storage devices are usually high-voltage, high-capacity devices, incorrect wiring can not only damage the energy storage device, but also injure the wiring personnel or even cause a fire.
[0034] For the reasons mentioned above, this application provides a wiring condition detection circuit 300. This wiring condition detection circuit 300 is applied to the battery pack 200 and can detect the wiring condition of the battery pack 200. The wiring personnel can use the wiring condition detection circuit 300 to determine whether the wiring is correct, thereby reducing the occurrence of wiring errors.
[0035] like Figure 4 As shown, the wiring condition detection circuit 300 provided in this embodiment includes: a first power supply VCC1, a control module 310, a voltage detection module 320, and a switch module 330. The first power supply VCC1 is connected to the first terminal of the switch module 330, the second terminal of the switch module 330 is connected to the first positive terminal B+ and the first terminal of the voltage detection module 320, the second terminal of the voltage detection module 320 is connected to the first terminal of the control module 310, and the second terminal of the control module 310 is connected to the third terminal of the switch module 330.
[0036] Voltage detection module 320 is configured to detect the voltage at the first positive terminal B+. Control module 310 is configured to control switch module 330 to turn on or off to establish or disconnect the connection between the first power supply VCC1 and the first positive terminal B+. Control module 310 is also configured to determine the wiring condition of battery pack 200 based on voltage after switch module 330 is turned on and the first positive terminal B+ is connected, wherein the wiring condition includes positive connection, reverse connection, and short circuit.
[0037] The first power supply VCC1 can be an independent power supply, or the voltage of the battery pack 200 can be converted by a voltage conversion circuit to obtain the voltage of the first power supply VCC1. The voltage of the first power supply VCC1 can be set as needed. For example, the voltage of the first power supply VCC1 relative to ground is 12V.
[0038] The control module 310 includes a microcontroller unit (MCU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a microcontroller, an acorn RISC machine (ARM), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of these components.
[0039] The voltage detection module 320 refers to a device that outputs a corresponding signal to the control module 310 based on the voltage at the first positive terminal B+. After receiving the corresponding signal, the control module 310 obtains the voltage at the first positive terminal B+. For example, the voltage detection module 320 may use a voltage divider circuit composed of multiple voltage divider resistors or a suitable voltage detection device in the prior art. Its structure can be set according to actual conditions and is not limited here.
[0040] The switch module 330 is a device that controls the connection between the first power supply VCC1 and the first positive terminal B+ to be turned on or off based on the signal sent by the control module 310. Specifically, when the control module 310 sends a high-level signal, the switch module 330 is turned on, establishing the connection between the first power supply VCC1 and the first positive terminal B+; when the control module 310 sends a low-level signal, the switch module 330 is turned off, disconnecting the connection between the first power supply VCC1 and the first positive terminal B+.
[0041] See Figure 4 and Figure 2 In the wiring condition detection circuit 300, after the wiring is completed, the control module 310 can control the switch module 330 to turn on, establishing a connection between the first power supply VCC1 and the first positive terminal B+. If the wiring condition is positive connection, the first power supply VCC1 will charge the bus capacitor C1 of the energy storage converter 100 through the switch module 330, the first positive terminal B+, and the second positive terminal P+. Therefore, the voltage curve obtained by repeatedly measuring the voltage at the first positive terminal B+ is a standard RC charging curve. Figure 5 As shown in curve S1; if the wiring condition is external short-circuit, then the first positive terminal B+ is grounded through the power line, and the voltage of the first positive terminal B+ is zero. The voltage curve obtained by measuring the voltage of the first positive terminal B+ multiple times at this time is shown in the figure. Figure 5 As shown in S2; if the wiring condition is reversed, the first positive terminal B+ is connected to Figure 2 The second negative terminal P-, and Figure 2 The second positive terminal in the circuit is grounded, and the first positive terminal B+ will be... Figure 2 In the step-up / step-down circuit 110, the body diode of NMOS transistor Q3 is clamped. Therefore, the voltage at the first positive terminal B+ is the clamping voltage of the body diode D1. The voltage curve obtained by repeatedly measuring the voltage at the first positive terminal B+ is as follows: Figure 5 As shown in S3.
[0042] As can be seen, the voltage of the first positive terminal B+ varies under different wiring conditions. Therefore, in this application, the control module 310 obtains the voltage of the first positive terminal B+ through the voltage detection module 320. Subsequently, the wiring condition can be determined based on the voltage of the first positive terminal B+, enabling wiring detection of the external power line. During use, the user can determine whether the wiring is correct based on the judgment result of the control module 310 or the output voltage curve, improving the safety and reliability of the wiring process. Moreover, detection can be performed not only when a single package is connected but also when multiple packages are connected in parallel. During the detection process, if a wiring error is found, it will be immediately determined that the high-voltage circuit will not be activated, thereby improving the safety of the circuit operation.
[0043] In some of these embodiments, see Figure 6 The switch module 330 includes a first switch unit 331, a second switch unit 332, and a third switch unit 333. The first terminal of the first switch unit 331 is connected to the second terminal of the control module 310. The second terminal of the first switch unit 331 is connected to the first terminal of the second switch unit 332, which is used to connect to the second power supply VCC2. The third terminal of the second switch unit 332 is connected to the first terminal of the third switch unit 333, which is connected to the first power supply VCC1. The third terminal of the third switch unit 333 is connected to the first positive terminal B+ and the first terminal of the voltage detection module 320. The control module 310 is configured to control the first switch unit 331 to be turned on or off; in response to the first switch unit 331 being turned on, the second switch unit 332 and the third switch unit 333 are turned on; in response to the first switch unit 331 being turned off, the second switch unit 332 and the third switch unit 333 are turned off.
[0044] The second power supply VCC2 can be an independent power supply, or the voltage of the battery pack 200 can be converted by a voltage conversion circuit to obtain the voltage of the second power supply VCC2. The voltage of the second power supply VCC2 can be set as needed. For example, the voltage of the second power supply VCC2 relative to ground GND is 5V.
[0045] The first switching unit 331 is a device that controls the second switching unit 332 to be turned on or off according to the signal sent by the control module 310, thereby controlling the connection between the first power supply VCC1 and the first positive terminal B+ to be turned on or off. Specifically, when the control module 310 sends a high-level signal, the first switching unit 331 is turned on, causing the second switching unit 332 and the third switching unit 333 to be turned on, thereby establishing the connection between the first power supply VCC1 and the first positive terminal B+; when the control module 310 sends a low-level signal, the first switching unit 331 is turned off, causing the second switching unit 332 and the third switching unit 333 to be turned off, thereby disconnecting the connection between the first power supply VCC1 and the first positive terminal B+.
[0046] In this embodiment, by setting the above-mentioned switch unit, the connection between the first power supply VCC1 and the first positive terminal B+ can be established or disconnected under the control of the control module 310.
[0047] In some of these embodiments, see Figure 7 The first switching unit 331 includes a first resistor R1, a second resistor R2, and a first switch Q1; the first end of the first resistor R1 is connected to the second end of the control module 310, the second end of the first resistor R1 is connected to the first end of the first switch Q1 and the first end of the second resistor R2, the second end of the first switch Q1 is connected to the first end of the second switching unit 332, and the third end of the first switch Q1 and the second end of the second resistor R2 are grounded to GND.
[0048] Specifically, the first switch Q1 is an NPN transistor. The first terminal of the first switch Q1 is the base of the NPN transistor, the second terminal is the collector of the NPN transistor, and the third terminal is the emitter of the NPN transistor. When the control module 310 sends a high-level signal, the first switch Q1 is turned on, grounding the first terminal of the second switch unit 332 to GND. When the control module 310 sends a low-level signal, the first switch Q1 is turned off, preventing the first terminal of the second switch unit 332 from being grounded to GND.
[0049] In this embodiment, a first resistor R1 is provided to limit the current input from the control module 310 to the first switch Q1, thereby protecting the first switch Q1. Additionally, a second resistor R2 ensures that the first terminal of the first switch Q1 is reliably grounded to GND when the signal output from the control module 310 is unstable. This reduces interference signals transmitted to the first switch Q1, preventing it from being falsely triggered and improving the stability and reliability of the wiring condition detection circuit 300.
[0050] In some of these embodiments, see Figure 7The second switching unit 332 includes a third resistor R3 and an isolating switch U1; the first end of the third resistor R3 is used to connect to the second power supply VCC2, the input end of the isolating switch U1 is located between the second end of the third resistor R3 and the second end of the first switching unit 331, and the output end of the isolating switch U1 is located between the first end of the third switching unit 333 and ground GND.
[0051] The disconnecting switch U1 includes one of the following: an optocoupler, an opto-field-effect transistor, and a photoelectric thyristor. Figure 7 In this example, the isolating switch U1 is used as an optocoupler. One end of the output terminal of the isolating switch U1 is the collector of the NPN transistor of the optocoupler U2, which is connected to the third switch unit 333. The other end of the output terminal of the isolating switch U1 is the emitter of the NPN transistor of the optocoupler U2, which is grounded to GND. One end of the input terminal of the isolating switch U1 is the anode of the light-emitting diode D1 of the optocoupler U2, which is connected to the second power supply VCC2 through the third resistor R3. The other end of the input terminal of the isolating switch U1 is the cathode of the light-emitting diode D1 of the optocoupler U2, which is connected to the second terminal of the first switch Q1.
[0052] Electrical isolation can be achieved by setting the above-mentioned device as the isolating switch U1. When the first switch unit 331 is turned on, the loop between the second power supply VCC2, the third resistor R3, the input terminal of the isolating switch U1 and ground GND is connected, the output terminal of the isolating switch U1 is turned on, and the connection between the third switch unit 333 and ground GND is established, so the third switch unit 333 is turned on; when the first switch unit 331 is turned off, the loop between the second power supply VCC2, the third resistor R3, the input terminal of the isolating switch U1 and ground GND is turned off, the output terminal of the isolating switch U1 is turned off, and the connection between the third switch unit 333 and ground GND is disconnected, so the third switch unit 333 is turned off.
[0053] In this embodiment, a third resistor R3 is provided to limit the current flowing between the input terminals of the isolating switch U1 when the isolating switch U1 is turned on, thereby protecting the isolating switch U1.
[0054] In some of these embodiments, see Figure 7 The third switch unit 333 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a second switch Q2. The first end of the second switch Q2 is connected to the first end of the fourth resistor R4 and the first power supply VCC1. The second end of the second switch Q2 is connected to the first end of the fifth resistor R5. The second end of the fifth resistor R5 is connected to the first positive terminal B+ and the first end of the voltage detection module 320. The third end of the second switch Q2 is connected to the second end of the fourth resistor R4 and the first end of the sixth resistor R6. The second end of the sixth resistor R6 is connected to the third end of the second switch unit 332.
[0055] Specifically, the second switch Q2 is a PMOS transistor. The first terminal of the second switch Q2 is the source of the PMOS transistor, the second terminal is the drain of the PMOS transistor, and the third terminal is the gate of the PMOS transistor. Figure 7 In the illustrated embodiment, when the control module 310 sends a high-level signal, the first switch Q1 is turned on, forming a loop between the second power supply VCC2, the third resistor R3, the input terminal of the isolating switch U1, the first switch Q1, and ground GND. The output terminal of the isolating switch U1 is turned on, forming a loop between the first power supply VCC1, the fourth resistor R4, the sixth resistor R6, the output terminal of the isolating switch U1, and ground GND. This causes the voltage at the third terminal of the second switch Q2 to be less than the voltage at the first terminal of the second switch Q2, and the second switch Q2 is turned on. When the control module 310 sends a low-level signal, the first switch Q1 is turned off, causing the isolating switch U1 to turn off. The third terminal of the second switch Q2 is pulled up through the fourth resistor R4, and the second switch Q2 is turned off.
[0056] In this embodiment, when the signal at the third terminal of the second switch Q2 is unstable, the fourth resistor R4 reliably pulls up the third terminal of the second switch Q2, ensuring that the second switch Q2 is reliably turned off, reducing the chance of the second switch Q2 being falsely triggered and turned on, and improving the reliability of the circuit operation. The fifth resistor R5 can limit the current output from the first power supply VCC1 to the first positive terminal B+. At the same time, when the third switch unit 333 is turned on, the fourth resistor R4 and the sixth resistor R6 limit the current flowing through the first power supply VCC1.
[0057] In some of these embodiments, see Figure 8 The wiring condition detection circuit 300 also includes an anti-backflow module 340; the first end of the anti-backflow module 340 is connected to the second end of the switch module 330, and the second end of the anti-backflow module 340 is connected to the first positive terminal B+ and the first end of the voltage detection module 320.
[0058] The anti-backflow module 340 is a device that restricts the direction of current flow. By setting the anti-backflow module 340, the current can be restricted from flowing from the first end of the anti-backflow module 340 to the second end of the anti-backflow module 340, and the current can be prevented from flowing from the second end of the anti-backflow module 340 to the first end of the anti-backflow module 340, thereby protecting the switch module 330 and the first power supply VCC1.
[0059] In some of these embodiments, see Figure 8 The anti-backflow module 340 includes a diode D1; the anode of the diode D1 is connected to the second terminal of the switch module 330, and the cathode of the diode D1 is connected to the first positive terminal B+ and the first terminal of the voltage detection module 320.
[0060] Specifically, the anode of diode D1 is connected to the second terminal of the fifth resistor R5. In this embodiment, by setting diode D1, current can be prevented from flowing back to the first power supply VCC1.
[0061] The second aspect of this application also provides a battery pack 200, which includes a first positive terminal B+, a first negative terminal B-, and a wiring condition detection circuit 300 as described in any embodiment of the first aspect; the first positive terminal B+ is connected to the wiring condition detection circuit 300, and the first positive terminal B+ and the first negative terminal B- are used to connect to an energy storage converter 100.
[0062] In this embodiment, the wiring condition detection circuit 300 has the same structure and function as the wiring condition detection circuit 300 described in any one of the first aspects, and will not be repeated here.
[0063] A third aspect of this application also provides an energy storage device 1000, which includes: an energy storage converter 100 and a battery pack 200 as described in any of the second aspects; the battery pack 200 is connected to the energy storage converter 100.
[0064] In this embodiment, the battery pack 200 has the same structure and function as the battery pack 200 described in any one of the second aspects, and will not be repeated here.
[0065] In some embodiments, the energy storage converter 100 includes a second positive terminal P+, a second negative terminal P-, a bus capacitor C1, and a step-up / step-down circuit; the second positive terminal P+ is connected to the bus capacitor C1 and the step-up / step-down circuit, and the second positive terminal P+ and the second negative terminal P- are connected to the battery pack 200.
[0066] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.
[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A line condition detection circuit, characterized by, Applied to a battery pack, the battery pack includes a first positive terminal and a first negative terminal; the wiring condition detection circuit includes: a first power supply, a control module, a voltage detection module, and a switch module; The first power supply is connected to the first terminal of the switching module, the second terminal of the switching module is connected to the first positive terminal and the first terminal of the voltage detection module, the second terminal of the voltage detection module is connected to the first terminal of the control module, and the second terminal of the control module is connected to the third terminal of the switching module. The voltage detection module is configured to detect the voltage at the first positive terminal. The control module is configured to control the switch module to turn on or off, so as to establish or disconnect the connection between the first power supply and the first positive terminal. The control module is also configured to determine the wiring condition of the battery pack based on the voltage after the switch module is turned on and the first positive terminal is connected, wherein the wiring condition includes positive connection, reverse connection and external short connection.
2. The wiring condition detection circuit according to claim 1, characterized in that, The switching module includes a first switching unit, a second switching unit, and a third switching unit; The first end of the first switching unit is connected to the second end of the control module, the second end of the first switching unit is connected to the first end of the second switching unit, the second end of the second switching unit is used to connect to the second power supply, the third end of the second switching unit is connected to the first end of the third switching unit, the second end of the third switching unit is connected to the first power supply, and the third end of the third switching unit is connected to the first positive terminal and the first end of the voltage detection module. The control module is configured to control the first switching unit to be turned on or off. In response to the first switching unit being turned on, the second switching unit and the third switching unit are also turned on; In response to the first switching unit being turned off, the second switching unit and the third switching unit are also turned off.
3. The wiring condition detection circuit according to claim 2, characterized in that, The first switching unit includes a first resistor, a second resistor, and a first switch; The first end of the first resistor is connected to the second end of the control module, the second end of the first resistor is connected to the first end of the first switch and the first end of the second resistor, the second end of the first switch is connected to the first end of the second switch unit, and the third end of the first switch and the second end of the second resistor are grounded.
4. The wiring condition detection circuit according to claim 2, characterized in that, The second switching unit includes a third resistor and an isolating switch; The first end of the third resistor is used to connect to the second power supply. The input end of the disconnecting switch is located between the second end of the third resistor and the second end of the first switching unit. The output end of the disconnecting switch is located between the first end of the third switching unit and ground.
5. The wiring condition detection circuit according to claim 2, characterized in that, The third switching unit includes a fourth resistor, a fifth resistor, a sixth resistor, and a second switch; The first end of the second switch is connected to the first end of the fourth resistor and the first power supply. The second end of the second switch is connected to the first end of the fifth resistor. The second end of the fifth resistor is connected to the first positive terminal and the first end of the voltage detection module. The third end of the second switch is connected to the second end of the fourth resistor and the first end of the sixth resistor. The second end of the sixth resistor is connected to the third end of the second switch unit.
6. The wiring condition detection circuit according to any one of claims 1-5, characterized in that, The wiring condition detection circuit also includes an anti-backflow module; The first end of the anti-backflow module is connected to the second end of the switch module, and the second end of the anti-backflow module is connected to the first positive terminal and the first end of the voltage detection module.
7. The wiring condition detection circuit according to claim 6, characterized in that, The anti-backflow module includes a diode; The anode of the diode is connected to the second terminal of the switching module, and the cathode of the diode is connected to the first positive terminal and the first terminal of the voltage detection module.
8. A battery pack, characterized in that, It includes a first positive terminal, a first negative terminal, and a wiring condition detection circuit as described in any one of claims 1-7; The first positive terminal is connected to the wiring condition detection circuit, and the first positive terminal and the first negative terminal are used to connect to the energy storage converter.
9. An energy storage device, characterized in that, include: Energy storage converter; battery pack as described in claim 8; The battery pack is connected to the energy storage converter.
10. The energy storage device according to claim 9, characterized in that, The energy storage converter includes a second positive terminal, a second negative terminal, a bus capacitor, and a step-up / step-down circuit. The second positive terminal is connected to the bus capacitor and the step-up / step-down circuit, and the second positive terminal and the second negative terminal are connected to the battery pack.