High-voltage direct-current control box of energy storage equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a high-voltage direct-current control box of energy storage equipment, which comprises a box body. The circuit breaker is arranged at the position close to the middle of the box body, and a switch of the circuit breaker is arranged on the side face of the interface and connected with the circuit breaker through a connecting shaft; the fuse, the diverter and the first contactor are all arranged between the circuit breaker and the side face of the interface, the fuse and the diverter are arranged on one side of the connecting shaft, and the first contactor is arranged on the other side of the connecting shaft, so that the situation that a box body is too large due to the fact that the transverse length of the circuit breaker is too large is avoided, and the space in the box body is more compact; meanwhile, the fuse and the shunt are arranged at close positions, so that the battery positive electrode interface and the battery negative electrode interface are arranged at the same side, and the interface arrangement is more in line with the use logic.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and specifically to a high-voltage DC control box for an energy storage device. Background Technology

[0002] A high-voltage DC control box is a unit used to distribute energy to energy storage devices, especially lithium batteries. It is an important part of the energy storage system. Its main functions include: providing a safe and reliable charging and discharging circuit for the battery pack; and real-time monitoring of parameters such as battery voltage, current, battery insulation resistance, and ambient temperature to accurately control the on / off state of the internal electrical circuits.

[0003] High-voltage DC control boxes typically include multiple components such as circuit breakers, shunts, and connecting wires. The positive terminal connects to the positive terminal of the power storage converter (PCS) and the positive terminal of the battery, while the negative terminal connects to the negative terminal of the PCS and the negative terminal of the battery, thus controlling the discharge circuit. However, existing high-voltage DC control boxes are bulky and have an unreasonable layout of components. For example, the "High-Voltage Control Box for a Lithium Battery Energy Storage System" disclosed in Chinese patent literature (publication number CN218632191U) has its circuit breaker located on one side of the box, occupying a large amount of space. This results in a loose and uncompact layout within the box and separates the positive and negative battery terminals, which is not logically sound. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of the large size of existing high-voltage DC control boxes and to provide a high-voltage DC control box with a compact structure and reasonable layout.

[0005] The technical solution provided by this utility model is as follows: A high-voltage DC control box for an energy storage device, comprising:

[0006] The enclosure has a battery positive terminal interface, a battery negative terminal interface, an energy storage converter positive terminal interface, and an energy storage converter negative terminal interface on its interface side.

[0007] The circuit breaker is located near the middle of the enclosure. The circuit breaker is connected to the positive terminal of the battery via a fuse and to the negative terminal of the battery via a shunt. The switch of the circuit breaker is located on the side of the interface and is connected to the circuit breaker via a connecting shaft.

[0008] The first contactor is used to connect the circuit breaker to the negative terminal of the energy storage converter.

[0009] The second contactor is used to connect the circuit breaker to the positive terminal of the energy storage converter.

[0010] The fuse, shunt, and first contactor are all disposed between the circuit breaker and the interface side, with the fuse and shunt disposed on one side of the connecting shaft and the first contactor disposed on the other side of the connecting shaft.

[0011] By setting the connecting shaft to position the circuit breaker near the center of the enclosure, the fuse, shunt, and first contactor can be positioned between the circuit breaker and the interface side. This avoids an excessively large enclosure due to the excessive lateral length of the circuit breaker, making the internal space of the enclosure more compact. At the same time, since the fuse and shunt are positioned close to each other, the positive and negative battery interfaces are located on the same side, making the interface arrangement more in line with usage logic.

[0012] Preferably, a pre-charging circuit is connected in parallel to both ends of the second contactor. The pre-charging circuit includes a third contactor and a pre-charging resistor connected in series. The pre-charging circuit is used to protect the entire circuit during switching to prevent overload damage to components.

[0013] Preferably, the second contactor and the third contactor have opposite on / off states. Before the current is turned on, the second contactor is off and the third contactor is on, so that the pre-charge resistor is connected to the circuit to protect the circuit from overload and damage to components at the moment of connection. When the circuit current stabilizes, the second contactor is on and the third contactor is off, so that the pre-charge resistor is blocked and the power consumption is reduced.

[0014] Preferably, the pre-charging circuit uses copper busbars to connect components, which can be tightened with bolts during installation, making installation more convenient and the box structure more neat and orderly.

[0015] Preferably, the pre-charging circuit is located on the side of the circuit breaker facing away from the interface, so as not to occupy space with the circuit breaker, fuse, shunt, etc.

[0016] Preferably, the circuit breaker is provided with four threaded interfaces for connecting copper busbars. The circuit breaker is connected to the fuse, shunt, first contactor, and second contactor respectively via the copper busbars. Preferably, the fuse is connected to the positive terminal of the battery, the shunt to the negative terminal of the battery, the first contactor to the negative terminal of the energy storage converter, and the second contactor to the positive terminal of the energy storage converter via copper busbars. Using copper busbars to connect components allows for easy installation using bolts, resulting in a neater and more organized enclosure structure.

[0017] Preferably, the bottom of the enclosure is provided with a raised fuse mounting base and a raised shunt mounting base. Since fuses and shunts often do not have an insulating layer, it is necessary to provide protrusions on the enclosure to prevent them from contacting the enclosure.

[0018] Preferably, the copper busbar connecting the positive terminal of the battery is bent downwards and connected to the fuse, while the copper busbar connecting the negative terminal of the battery is bent upwards and connected to the shunt. This increases the distance between the positive and negative terminals of the battery, making it more convenient to connect the battery and less likely to cause confusion.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] By setting the connecting shaft, the circuit breaker is placed near the middle of the enclosure, so that the fuse, shunt and first contactor can be placed between the circuit breaker and the interface side, thereby avoiding the enclosure being too large due to the excessive lateral length of the circuit breaker, making the space inside the enclosure more compact.

[0021] Because the fuse and shunt are located in close proximity, the positive and negative terminals of the battery are located on the same side, which makes the interface arrangement more in line with the usage logic.

[0022] The wiring uses copper busbars for easy installation and a simple, orderly layout.

[0023] The distance between the positive and negative terminals of the battery is increased by bending the copper busbar, making the interface layout more flexible. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention after removing the top surface of the box body 1;

[0025] Figure 2 This is a top view of Embodiment 1 of the present invention after removing the top surface of the box body 1;

[0026] Figure 3 This is a front view schematic diagram of Embodiment 1 of the present utility model;

[0027] Figure 4 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention after removing the box body 1;

[0028] Figure 5 This is a three-dimensional schematic diagram of the present invention from another perspective after removing the box body 1 in Embodiment 1.

[0029] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Battery positive terminal interface; 12. Battery negative terminal interface; 13. Energy storage converter positive terminal interface; 14. Energy storage converter negative terminal interface; 15. Interface side; 16. Fuse mounting base; 17. Shunt mounting base; 2. Circuit breaker; 21. Switch; 22. Connecting shaft; 3. Fuse; 4. Shunt; 5. First contactor; 6. Second contactor; 7. Third contactor; 8. Precharge resistor; 91. First copper busbar step; 92. Second copper busbar step. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0031] For ease of description, the plane of the enclosure 1 where the circuit breaker 2 is placed is a horizontal plane, and this plane is the bottom plane.

[0032] Example 1, as Figures 1-5 As shown, a high-voltage DC control box for an energy storage device includes:

[0033] The enclosure 1 has a battery positive terminal interface 11, a battery negative terminal interface 12, an energy storage converter positive terminal interface 13, and an energy storage converter negative terminal interface 14 on its interface side 15.

[0034] Circuit breaker 2 is located near the middle of the enclosure. Circuit breaker 2 is connected to the positive terminal interface 11 of the battery through fuse 3. Circuit breaker 2 is connected to the negative terminal interface 12 of the battery through shunt 4. The switch 21 of circuit breaker 2 is located on the side 15 of the interface and is connected to circuit breaker 2 through connecting shaft 22.

[0035] The first contactor 5 and the circuit breaker 2 are connected to the negative terminal interface 14 of the energy storage converter through the first contactor 5.

[0036] The second contactor 6, the circuit breaker 2 is connected to the positive terminal interface 13 of the energy storage converter through the second contactor 6;

[0037] The fuse 3, shunt 4 and first contactor 5 are all located between the circuit breaker 2 and the interface side 15, with the fuse 3 and shunt 4 located on one side of the connecting shaft 22 and the first contactor 5 located on the other side of the connecting shaft 22.

[0038] By setting the connecting shaft 22, the circuit breaker 2 is positioned near the middle of the enclosure, allowing the fuse 3, shunt 4, and first contactor 5 to be positioned between the circuit breaker 2 and the interface side 15. This avoids the enclosure becoming too large due to the excessive lateral length of the circuit breaker 2, making the internal space of the enclosure more compact. At the same time, since the fuse 3 and shunt 4 are positioned close to each other, the battery positive terminal interface 11 and battery negative terminal interface 12 are positioned on the same side, while the energy storage converter positive terminal interface 13 and energy storage converter negative terminal interface 14 are positioned on the other side, making the interface arrangement more in line with usage logic.

[0039] The two ends of the second contactor 6 are connected in parallel with a pre-charging circuit, which includes a third contactor 7 and a pre-charging resistor 8 connected in series. The pre-charging circuit is used to protect the entire circuit during switching to prevent overload damage to components.

[0040] The second contactor 6 and the third contactor 7 have opposite on / off states. Before the current is turned on, the second contactor 6 is off and the third contactor 7 is on, so that the pre-charge resistor 8 is connected to the circuit to protect the circuit from overload and damage to components at the moment of connection. When the circuit current stabilizes, the second contactor 6 is on and the third contactor 7 is off, so that the pre-charge resistor 8 is de-energized, reducing power consumption.

[0041] The pre-charging circuit uses copper busbars to connect components, and bolts can be tightened during installation, making installation more convenient and the enclosure structure more neat and orderly.

[0042] The pre-charging circuit is located on the side of the circuit breaker 2 facing away from the interface 15, and does not occupy space with the circuit breaker 2, fuse 3, shunt 4, etc.

[0043] Circuit breaker 2 has four threaded interfaces for connecting copper busbars. Circuit breaker 2 is connected to fuse 3, shunt 4, first contactor 5, and second contactor 6 via these copper busbars. Fuse 3 is connected to the battery positive terminal 11, shunt 4 to the battery negative terminal 12, first contactor 5 to the energy storage converter negative terminal 14, and second contactor 6 to the energy storage converter positive terminal 13 via copper busbars. Using copper busbars to connect components allows for easy installation using bolts, resulting in a neater and more organized enclosure structure.

[0044] The bottom of the enclosure 1 is provided with a raised fuse mounting base 16 and a raised shunt mounting base 17. Since the bottom of the fuse 3 and the shunt 4 often does not have an insulation layer, it is necessary to provide a protrusion on the enclosure to avoid contact with the enclosure.

[0045] The copper busbar connecting to the positive terminal 11 of the battery is bent downwards and then horizontally connected to the fuse 3, forming the first copper busbar step 91. The copper busbar connecting to the negative terminal 12 of the battery is bent upwards and then horizontally connected to the shunt 4, forming the second copper busbar step 92. This increases the distance between the positive terminal 11 and the negative terminal 12 of the battery, making battery connection more convenient and less prone to confusion. Similarly, the copper busbar connecting to the negative terminal 14 of the energy storage converter is bent upwards and then horizontally connected to the first contactor 5, offsetting the positions of the negative terminal 14 and the positive terminal 13 of the energy storage converter, making connection of the energy storage converter more convenient.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

Claims

1. A high-voltage DC control box for an energy storage device, characterized in that, include: The housing (1) has a battery positive terminal interface (11), a battery negative terminal interface (12), an energy storage converter positive terminal interface (13), and an energy storage converter negative terminal interface (14) on its interface side (15). The circuit breaker (2) is located near the middle of the housing. The circuit breaker (2) is connected to the positive terminal interface (11) of the battery through the fuse (3). The circuit breaker (2) is connected to the negative terminal interface (12) of the battery through the shunt (4). The switch (21) of the circuit breaker (2) is located on the side (15) of the interface and is connected to the circuit breaker (2) through the connecting shaft (22). The first contactor (5) is used to connect the circuit breaker (2) to the negative terminal interface (14) of the energy storage converter. The second contactor (6) is used to connect the circuit breaker (2) to the positive terminal interface (13) of the energy storage converter. The fuse (3), shunt (4) and first contactor (5) are all disposed between the circuit breaker (2) and the interface side (15), and the fuse (3) and shunt (4) are disposed on one side of the connecting shaft (22), and the first contactor (5) is disposed on the other side of the connecting shaft (22).

2. The high-voltage DC control box for the energy storage device according to claim 1, characterized in that, The two ends of the second contactor (6) are connected in parallel with a pre-charging circuit, which includes a third contactor (7) and a pre-charging resistor (8) connected in series.

3. The high-voltage DC control box for the energy storage device according to claim 2, characterized in that, The second contactor (6) has the opposite on / off state to the third contactor (7).

4. The high-voltage DC control box of the energy storage device according to claim 2 or 3, characterized in that, The pre-charging circuit uses copper busbars to connect the components.

5. The high-voltage DC control box of the energy storage device according to claim 2 or 3, characterized in that, The pre-charging circuit is located on the side of the circuit breaker (2) facing away from the interface side (15).

6. The high-voltage DC control box for the energy storage device according to any one of claims 1-3, characterized in that, The circuit breaker (2) is provided with four threaded interfaces for connecting copper busbars. The circuit breaker (2) is connected to the fuse (3), shunt (4), first contactor (5), and second contactor (6) respectively through the copper busbars.

7. The high-voltage DC control box for the energy storage device according to any one of claims 1-3, characterized in that, The fuse (3) is connected to the positive terminal interface (11) of the battery, the shunt (4) is connected to the negative terminal interface (12) of the battery, the first contactor (5) is connected to the negative terminal interface (14) of the energy storage converter, and the second contactor (6) is connected to the positive terminal interface (13) of the energy storage converter via copper busbars.

8. The high-voltage DC control box for the energy storage device according to any one of claims 1-3, characterized in that, The bottom of the housing (1) is provided with a raised fuse mounting base (16) and a raised shunt mounting base (17).

9. The high-voltage DC control box of the energy storage device according to claim 7, characterized in that, The copper busbar connected to the positive terminal interface (11) of the battery is bent downward and connected to the fuse (3), and the copper busbar connected to the negative terminal interface (12) of the battery is bent upward and connected to the shunt (4).

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