Hot spot automatic circuit breaker and photovoltaic module having the same

Abstract

The present application relates to photovoltaic module technical field, especially a kind of hot spot automatic circuit breaker and photovoltaic module with hot spot automatic circuit breaker, hot spot automatic circuit breaker includes main circuit output end M1, main circuit output end M2, battery string access end N1, battery string access end N2, main circuit connection circuit, bypass circuit, short circuit, voltage detection module V, current detection module A1, current detection module A2, state switching module, current comparison module, switch S1, switch S2 and switch S3.The present application is optimized on circuit structure, bypass and disconnect with main circuit to the photovoltaic cell string that hot spot fault occurs, prevent hot spot temperature rise, so that hot spot heat has time to dissipate in time, so the temperature on cell piece when hot spot occurs can be greatly reduced;And whether hot spot is eliminated is detected in time, access main circuit in time after elimination;The preset value of voltage can be set, so it can be earlier intervention than bypass diode scheme when hot spot occurs.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module technology, and in particular to an automatic hot spot circuit breaker and a photovoltaic module having an automatic hot spot circuit breaker. Background Technology

[0002] The existing solution to the hot spot problem in photovoltaic modules is to connect a bypass diode in parallel at both ends of the photovoltaic cell string. When shading occurs, the voltage of the shaded photovoltaic (PV) cell string initially decreases. As the shading area increases, the voltage gradually drops to a negative value and further decreases until the bypass diode activates. At this point, the bypass diode conducts, bypassing the PV cell string. Some current flows through the bypass diode. As the shading area increases, the current flowing through the bypass diode gradually increases, while the current flowing through the shaded PV cell string gradually decreases. The power consumed by the shaded PV cell string undergoes a process of gradually increasing, then gradually decreasing after the bypass diode activates. In reality, when the voltage across the shaded cell in the PV cell string is negative, the cell begins to heat up. Under some shading conditions, the bypass diode will not activate, and even after the bypass diode activates, the heating of the shaded cell does not stop. The bypass diode primarily addresses the issue of not affecting the power generation of other PV cell strings and reduces the voltage of the shaded cell with hot spot faults to a certain extent, but it cannot fundamentally solve the problem of the shaded cell overheating. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the intervention in the photovoltaic module after the hot spot problem occurs is too late, and the heating problem of the shaded cells cannot be solved in time.

[0004] The technical solution adopted by this invention to solve its technical problem is: an automatic hot spot circuit breaker, including a main circuit output terminal M1, a main circuit output terminal M2, a battery string connection terminal N1, a battery string connection terminal N2, a main circuit connection circuit, a bypass circuit, a short circuit circuit, a voltage detection module V, a current detection module A1, a current detection module A2, a state switching module, a current comparison module, switches S1, S2, and S3. The battery string connection terminals N1 and N2 are used to connect to corresponding photovoltaic cell strings. The main circuit output terminals M1 and M2 are used to connect the corresponding photovoltaic cell strings to the main circuit of the photovoltaic module. The battery string input terminal N2 and the main circuit output terminal M2 are connected via a main circuit connection circuit. One end of the bypass circuit is connected to the main circuit output terminal M1, and the other end is connected to the main circuit output terminal M2. One end of the short circuit is connected to the battery string input terminal N1, and the other end is connected to the battery string input terminal N2. Switch S1 is connected in series in the main circuit connection circuit to switch the main circuit connection circuit on and off, and is located between the bypass circuit and the short circuit. Switch S2 is connected in series in the bypass circuit to switch the bypass circuit on and off. Switch S3 is connected in series in the short circuit to switch the short circuit on and off. One end of the voltage detection module V is connected to the battery string input terminal N1. The voltage detection module V... The other end is connected to the battery string input terminal N2, used to detect whether the voltage of the corresponding photovoltaic cell string is less than a preset value. When the voltage detection module V detects that the voltage is less than the preset value, it controls switch S2 to close and switch S1 to open. The current comparison module is connected to the current detection module A1, the current detection module A2, switch S1, switch S2, and switch S3 respectively. The current detection module A1 is used to detect the short-circuit current I1 flowing through the short-circuit circuit of the battery string. The current detection module A2 is used to detect the main circuit current I2 flowing through the bypass circuit. The current comparison module controls switch S3 to close at regular intervals to detect the short-circuit current I1 of the battery string at regular intervals. When the current comparison module detects that the short-circuit current I1 of the battery string is greater than the main circuit current I2, it closes the battery string short-circuit current I1. When the circuit current is I2, control switch S3 is open, switch S1 is closed, and switch S2 is open. The state switching module is connected to the voltage detection module V and the current comparison module. When the voltage detected by the voltage detection module V is less than the preset value, the voltage detection module V sends a state switching signal. After receiving the state switching signal, the state switching module puts the voltage detection module V into the non-working state and puts the current comparison module into the working state. When the current comparison module detects that the battery string short-circuit current I1 is greater than the main circuit current I2, the current comparison module sends a state switching signal. After receiving the state switching signal, the state switching module puts the voltage detection module V into the working state and puts the current comparison module into the non-working state.

[0005] A photovoltaic module with an automatic hot spot circuit breaker includes a photovoltaic cell string and the aforementioned automatic hot spot circuit breaker that is matched with the photovoltaic cell string. The photovoltaic cell string is connected to the matched automatic hot spot circuit breaker and is connected to the main circuit of the photovoltaic module through the matched automatic hot spot circuit breaker.

[0006] In some embodiments, optionally, each photovoltaic cell string is equipped with a hot spot automatic circuit breaker, and the hot spot automatic circuit breakers are connected in series; or, every two photovoltaic cell strings are equipped with a hot spot automatic circuit breaker, the two photovoltaic cell strings connected to the same hot spot automatic circuit breaker are connected in parallel, and the hot spot automatic circuit breakers are connected in series.

[0007] In some embodiments, the hot spot automatic circuit breaker may also include a housing, the circuit portion of which is located within the housing, and the hot spot automatic circuit breaker is fixed to the back of the photovoltaic module via the housing.

[0008] In some embodiments, the hot spot automatic circuit breaker can optionally be divided into a positive hot spot automatic circuit breaker, an intermediate hot spot automatic circuit breaker, and a negative hot spot automatic circuit breaker. The intermediate hot spot automatic circuit breaker is located between the positive hot spot automatic circuit breaker and the negative hot spot automatic circuit breaker. The positive terminal of the main circuit output of the positive hot spot automatic circuit breaker and the negative terminal of the main circuit output of the negative hot spot automatic circuit breaker serve as the positive and negative terminals of the photovoltaic module, respectively, for transmitting the current of the photovoltaic module to the outside.

[0009] The beneficial effects of this invention are as follows: The automatic hot spot circuit breaker detects the voltage of the photovoltaic cell string. When the voltage of the photovoltaic cell string is significantly lower than a preset value, the problematic photovoltaic cell string is bypassed using a bypass circuit, while the current of other photovoltaic cell strings is unaffected by the bypass circuit. This disconnects the problematic photovoltaic cell string, thus preventing the hot spot temperature from rising. Simultaneously, the short-circuit current I1 and main circuit current I2 of this photovoltaic cell string are periodically detected. When the short-circuit current I1 of this photovoltaic cell string is less than the main circuit current I2 of the photovoltaic module, it indicates that some cells are still being shaded. In this case, the photovoltaic cell string remains disconnected for a certain delay, and the voltage is tested again. If the short-circuit current I1 of the photovoltaic cell string is still less than I2, repeat the above steps until I1 > I2, indicating that the shading has been eliminated. At this point, connect the photovoltaic cell string back to the main circuit of the photovoltaic module. Then repeat the above process. This allows the photovoltaic cell string with hot spot faults to be bypassed and disconnected from the main circuit without affecting power generation, preventing the hot spot temperature from rising and allowing the heat from the hot spot to dissipate in time, thus significantly reducing the temperature on the cell when hot spots occur. It also periodically checks whether the hot spot has been eliminated and connects it back to the main circuit in time after elimination. The preset voltage value can be set, so it can intervene earlier than the bypass diode solution when hot spots occur. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a circuit diagram of the automatic circuit breaker for hot spots on the back of the photovoltaic module of the present invention;

[0012] Figure 2 This is a front view of the photovoltaic module of the present invention;

[0013] Figure 3 This is a front view of a photovoltaic module in the prior art;

[0014] Figure 4 This is a schematic diagram of the back of the photovoltaic module of the present invention;

[0015] Figure 5 This is a schematic diagram of the back of a photovoltaic module in the prior art;

[0016] Figure 6 This is a circuit diagram of the photovoltaic module of the present invention;

[0017] Figure 7 This is a circuit diagram of a photovoltaic module in the existing technology.

[0018] In the diagram, 1. Photovoltaic module, 11. Photovoltaic cell string, 2. Hot spot automatic circuit breaker, 21. Positive hot spot automatic circuit breaker, 22. Intermediate hot spot automatic circuit breaker, 23. Negative hot spot automatic circuit breaker, 3. Box, 4. Junction box. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, an automatic hot spot circuit breaker includes a main circuit output terminal M1, a main circuit output terminal M2, a battery string connection terminal N1, a battery string connection terminal N2, a main circuit connection circuit, a bypass circuit, a short circuit circuit, a voltage detection module V, a current detection module A1, a current detection module A2, a state switching module, a current comparison module, a switch S1, a switch S2, and a switch S3.

[0021] Battery string access terminals N1 and N2 are used to connect to the corresponding photovoltaic cell strings 11. Main circuit output terminals M1 and M2 are used to connect the corresponding photovoltaic cell strings 11 to the main circuit of photovoltaic module 1. Battery string access terminals N1 and M1, as well as battery string access terminals N2 and M2, are connected through a main circuit connection circuit. One end of the bypass circuit is connected to the main circuit output terminal M1, and the other end is connected to the main circuit output terminal M2. One end of the short circuit is connected to battery string access terminal N1, and the other end is connected to battery string access terminal N2. Switch S1 is connected in series in the main circuit connection circuit to switch the main circuit connection circuit on and off, and is located between the bypass circuit and the short circuit. Switch S2 is connected in series in the bypass circuit to switch the bypass circuit on and off. Switch S3 is connected in series in the short circuit to switch the short circuit on and off.

[0022] One end of the voltage detection module V is connected to the battery string access terminal N1, and the other end of the voltage detection module V is connected to the battery string access terminal N2. It is used to detect whether the voltage of the corresponding photovoltaic cell string 11 is less than a preset value. When the voltage detection module V detects that the voltage is less than the preset value, it controls the switch S2 to close and the switch S1 to open.

[0023] The current comparison module is connected to the current detection module A1, the current detection module A2, the switch S1, the switch S2, and the switch S3 respectively. The current detection module A1 is used to detect the short-circuit current I1 flowing through the battery string in the short-circuit circuit, and the current detection module A2 is used to detect the main circuit current I2 flowing through the bypass circuit.

[0024] The current comparison module controls switch S3 to close at regular intervals to detect the short-circuit current I1 of the battery string at regular intervals. When the current comparison module detects that the short-circuit current I1 of the battery string is greater than the main circuit current I2, it controls switch S3 to open, switch S1 to close, and switch S2 to open.

[0025] The state switching module is connected to the voltage detection module V and the current comparison module. When the voltage detected by the voltage detection module V is less than the preset value, the voltage detection module V sends a state switching signal. After receiving the state switching signal, the state switching module puts the voltage detection module V into a non-working state and puts the current comparison module into a working state.

[0026] When the current comparison module detects that the short-circuit current I1 of the battery string is greater than the main circuit current I2, the current comparison module sends a state switching signal. After receiving the state switching signal, the state switching module puts the voltage detection module V into the working state and the current comparison module into the non-working state.

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, a photovoltaic module with an automatic hot spot circuit breaker includes a photovoltaic cell string 11 and an automatic hot spot circuit breaker 2 that is matched with the photovoltaic cell string 11. The photovoltaic cell string 11 is connected to the matching automatic hot spot circuit breaker 2 and is connected to the main circuit of the photovoltaic module 1 through the matching automatic hot spot circuit breaker 2.

[0028] Each photovoltaic cell string 11 is equipped with a hot spot automatic circuit breaker 2, and the hot spot automatic circuit breakers 2 are connected in series; or, every two photovoltaic cell strings 11 are equipped with a hot spot automatic circuit breaker 2, the two photovoltaic cell strings 11 connected to the same hot spot automatic circuit breaker 2 are connected in parallel, and the hot spot automatic circuit breakers 2 are connected in series. Figure 6 As shown.

[0029] The hot spot automatic circuit breaker 2 also includes a housing 3, the circuit part of the hot spot automatic circuit breaker 2 is located inside the housing 3, and the hot spot automatic circuit breaker 2 is fixed to the back of the photovoltaic module 1 through the housing 3.

[0030] The automatic circuit breakers 2 on the back of the photovoltaic module 1 are divided into a positive hot spot automatic circuit breaker 21, an intermediate hot spot automatic circuit breaker 22, and a negative hot spot automatic circuit breaker 23. The intermediate hot spot automatic circuit breaker 22 is located between the positive hot spot automatic circuit breaker 21 and the negative hot spot automatic circuit breaker 23. The positive terminal of the main circuit output of the positive hot spot automatic circuit breaker 21 and the negative terminal of the main circuit output of the negative hot spot automatic circuit breaker 23 serve as the positive and negative terminals of the photovoltaic module 1, respectively, for transmitting the current of the photovoltaic module 1 to the outside.

[0031] The voltage detection module V, current detection modules A1 and A2, state switching module, and current comparison module can be implemented through hardware circuits, or some or all of the functions of each module can be implemented through existing computer programs within the chip. Based on different current detection principles, current detection modules A1 and A2 are connected in series or parallel in the short-circuit circuit and bypass circuit, respectively, or current detection modules A1 and A2 are placed near the short-circuit circuit and bypass circuit in a non-contact manner.

[0032] In this embodiment, current detection module A1 and current detection module A2 are connected in series in the short-circuit circuit and bypass circuit, respectively, to perform current detection.

[0033] Switch S1 is a normally closed switch, while switches S2 and S3 are normally open switches. All switches S1, S2, and S3 are electronic switches.

[0034] To clearly show the connection relationships between the main circuit output terminals M1 and M2, the battery string connection terminals N1 and N2, the main circuit connection circuit, the bypass circuit, the short circuit circuit, the voltage detection module V, the current detection module A1, the current detection module A2, the switch S1, the switch S2, and the switch S3, the state switching module and the current comparison module are omitted in the attached figure.

[0035] The working principle of the hot spot automatic circuit breaker 2 is as follows:

[0036] During normal operation, switch S1 is normally closed, and switches S2 and S3 are normally open. The photovoltaic module 1 connects the photovoltaic cell strings 11 inside the photovoltaic module 1 together through three hot spot automatic circuit breakers 2 and transmits current to the outside.

[0037] The voltage detection module V periodically measures the voltage of the photovoltaic cell string 11. Since crystalline silicon cells normally operate at a voltage between 0.5 and 0.7V when generating electricity, assuming the number of cells in the photovoltaic string 11 is n, the voltage should be measured between 0.5n and 0.7nV during normal operation. If the voltage is lower than this value, it indicates external shading, damage to the cells in the photovoltaic string 11, or a significant power reduction. If the shading area is large enough, such as... Figure 7 As shown, in the existing photovoltaic module 1, the bypass diode connected in parallel will activate, which is equivalent to shielding this photovoltaic cell string 11 and will not affect the power generation of other photovoltaic cell strings 11. However, the photovoltaic cell string 11 with hot spots will still have reverse bias voltage and current at both ends, and the cells in the photovoltaic cell string 11 will continue to heat up, which will affect the lifespan of the photovoltaic module 1, and in severe cases, may even cause a fire.

[0038] Assuming the preset value of voltage detection module V is set to 0.4nV, when the voltage measured by voltage detection module V is greater than 0.4nV, it does not activate. After a certain delay, such as 2 seconds, it measures the voltage again until the measured voltage is less than 0.4nV. At this time, it sends a trigger signal to switch S2, and switch S2 closes. At this time, the current in the main circuit of the photovoltaic module can flow through the bypass circuit connected in series with switch S2, without affecting the power generation of other photovoltaic cell strings 11 in photovoltaic module 1. After switch S2 closes, switch S1 opens after a certain delay, such as 1 second. At this time, the photovoltaic cell string 11 with the hot spot is disconnected, and the cells will begin to cool down. While switch S1 remains open, switch S3 closes every certain period of time, such as 30 seconds. At this time, both current detection devices A1 and A2 are connected, and the short-circuit current I1 of photovoltaic cell string 11 and the main circuit current can be measured respectively. The current comparison module I2 periodically detects the short-circuit current I1 and the main circuit current I2 through current detection devices A1 and A2. When I1 ≤ I2, it indicates that there is still shading on this photovoltaic cell string 11. Switch S3 is opened, and after 30 seconds, switch S3 is closed, and the short-circuit current I1 and the main circuit current I2 are detected again. If I1 ≤ I2, the above process is repeated. Until the current comparison module detects I1 > I2, the shading condition of the cells in this photovoltaic cell string 11 is eliminated, and it can be connected to the main circuit of the photovoltaic module 1 for power generation. At this time, switch S3 is opened first, switch S1 is closed and delayed for 1 second, and then switch S2 is opened. At this time, this photovoltaic cell string 11 is connected to the main circuit of the photovoltaic module 1 for power generation. At this time, the voltage detection module V detects the voltage across the photovoltaic cell string 11 again, and the above actions are repeated.

[0039] Even if a hot spot occurs, the photovoltaic cell string 11 in which the hot spot occurs will be quickly disconnected. Therefore, the hot spot occurs discontinuously, allowing for heat dissipation time, and the temperature of the cells in the photovoltaic cell string 11 in which the hot spot occurs can be significantly reduced.

[0040] Switches S1 and S2 can be closed simultaneously, or one can be closed and the other open, but they cannot be opened at the same time. If they are opened at the same time, the entire circuit will be broken. When the switches are closed again, arcing will occur due to excessive voltage, which will damage the switches.

[0041] The hot spot automatic circuit breaker 2 can be used not only in crystalline silicon photovoltaic modules 1, but also in thin-film and other types of photovoltaic modules 1. It is only necessary to adjust the preset value of the voltage detection module V according to the type of cell in the photovoltaic module 1.

[0042] In addition, the voltage of crystalline silicon solar cells can be set to be lower or higher. The higher the value, the more sensitive the start-up and the lower the risk of hot spots. However, if the value is too high, it may exceed the range of the inverter's MPPT and cause malfunctions. Therefore, it is necessary to match the setting according to the performance of the photovoltaic module 1 and the connected inverter.

[0043] like Figure 3 and 7 As shown, in the prior art, the connection structure between photovoltaic cell strings 11 in photovoltaic module 1 is a series-parallel-series structure, with a bypass diode connected in parallel between two photovoltaic cell strings 11 to form a cell string group, and the three cell string groups are connected in series with each other; while as Figure 2 and Figure 6 As shown, the photovoltaic cell strings 11 in the photovoltaic module 1 with hot spot automatic circuit breaker 2 are connected in a series-parallel structure. The three hot spot automatic circuit breakers 2 are divided into a positive hot spot automatic circuit breaker 21, an intermediate hot spot automatic circuit breaker 22, and a negative hot spot automatic circuit breaker 23. Each pair of photovoltaic cell strings 11 is matched with one hot spot automatic circuit breaker 2 to form a battery string group. The two photovoltaic cell strings 11 connected to the same hot spot automatic circuit breaker 2 are connected in parallel. The hot spot automatic circuit breakers 2 are connected in series. Each battery string group does not affect each other. When a hot spot occurs, this battery string group can be disconnected from the main circuit of the photovoltaic module 1.

[0044] like Figure 5 As shown, in the prior art, the photovoltaic module 1 has three junction boxes 4 on its back, each junction box 4 containing a bypass diode, and the three junction boxes are independent of each other; while as Figure 4 As shown, the photovoltaic module 1 with hot spot automatic circuit breaker 2 has three hot spot automatic circuit breakers 2 on the back side, and the three hot spot automatic circuit breakers 2 are connected together.

Claims

1. A hot spot automatic circuit breaker, characterized in that: Includes main circuit output terminal M1, main circuit output terminal M2, battery string connection terminal N1, battery string connection terminal N2, main circuit connection circuit, bypass circuit, short circuit circuit, voltage detection module V, current detection module A1, current detection module A2, state switching module, current comparison module, switch S1, switch S2 and switch S3; Battery string access terminal N1 and battery string access terminal N2 are used to connect to the corresponding photovoltaic cell string (11). Main circuit output terminal M1 and main circuit output terminal M2 are used to connect the corresponding photovoltaic cell string (11) to the main circuit of the photovoltaic module (1). Battery string access terminal N1 and main circuit output terminal M1 and battery string access terminal N2 and main circuit output terminal M2 are connected through the main circuit connection circuit. One end of the bypass circuit is connected to the main circuit output terminal M1 and the other end of the bypass circuit is connected to the main circuit output terminal M2. One end of the short circuit is connected to the battery string access terminal N1 and the other end of the short circuit is connected to the battery string access terminal N2. Switch S1 is connected in series in the main circuit connection circuit to switch the main circuit connection circuit on and off, and is located between the bypass circuit and the short circuit. Switch S2 is connected in series in the bypass circuit to switch the bypass circuit on and off. Switch S3 is connected in series in the short circuit to switch the short circuit on and off. One end of the voltage detection module V is connected to the battery string access terminal N1, and the other end of the voltage detection module V is connected to the battery string access terminal N2. It is used to detect whether the voltage of the corresponding photovoltaic battery string (11) is less than the preset value. When the voltage detection module V detects that the voltage is less than the preset value, it controls the switch S2 to close and the switch S1 to open. The current comparison module is connected to the current detection module A1, the current detection module A2, the switch S1, the switch S2, and the switch S3 respectively. The current detection module A1 is used to detect the short-circuit current I1 flowing through the battery string in the short-circuit circuit, and the current detection module A2 is used to detect the main circuit current I2 flowing through the bypass circuit. The current comparison module controls the switch S3 to close at regular intervals to detect the short-circuit current I1 of the battery string at regular intervals. When the current comparison module detects that the short-circuit current I1 of the battery string is greater than the main circuit current I2, it controls the switch S3 to open, the switch S1 to close, and the switch S2 to open. The state switching module is connected to the voltage detection module V and the current comparison module. When the voltage detected by the voltage detection module V is less than the preset value, the voltage detection module V sends a state switching signal. After receiving the state switching signal, the state switching module puts the voltage detection module V into a non-working state and puts the current comparison module into a working state. When the current comparison module detects that the short-circuit current I1 of the battery string is greater than the main circuit current I2, the current comparison module sends a state switching signal. After receiving the state switching signal, the state switching module puts the voltage detection module V into the working state and the current comparison module into the non-working state.

2. A photovoltaic module with an automatic hot spot circuit breaker, characterized in that: It includes a photovoltaic cell string (11) and a hot spot automatic circuit breaker (2) as described in claim 1, which is matched with the photovoltaic cell string (11). The photovoltaic cell string (11) is connected to the matching hot spot automatic circuit breaker (2) and connected to the main circuit of the photovoltaic module (1) through the matching hot spot automatic circuit breaker (2).

3. The photovoltaic module with an automatic hot spot circuit breaker according to claim 2, characterized in that: Each photovoltaic cell string (11) is equipped with a hot spot automatic circuit breaker (2), and the hot spot automatic circuit breakers (2) are connected in series. Alternatively, each pair of photovoltaic cell strings (11) is equipped with a hot spot automatic circuit breaker (2), and the two photovoltaic cell strings (11) connected to the same hot spot automatic circuit breaker (2) are connected in parallel, and the hot spot automatic circuit breakers (2) are connected in series.

4. The photovoltaic module with an automatic hot spot circuit breaker according to claim 3, characterized in that: The hot spot automatic circuit breaker (2) also includes a housing (3), the circuit part of the hot spot automatic circuit breaker (2) is located inside the housing (3), and the hot spot automatic circuit breaker (2) is fixed to the back of the photovoltaic module (1) through the housing (3).

5. The photovoltaic module with an automatic hot spot circuit breaker according to claim 3, characterized in that: The hot spot automatic circuit breaker (2) is divided into a positive hot spot automatic circuit breaker (21), an intermediate hot spot automatic circuit breaker (22) and a negative hot spot automatic circuit breaker (23). The intermediate hot spot automatic circuit breaker (22) is located between the positive hot spot automatic circuit breaker (21) and the negative hot spot automatic circuit breaker (23). The positive terminal of the main circuit output of the positive hot spot automatic circuit breaker (21) and the negative terminal of the main circuit output of the negative hot spot automatic circuit breaker (23) serve as the positive and negative terminals of the photovoltaic module (1) respectively, and are used to transmit the current of the photovoltaic module (1) to the outside.

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