Energy storage high-voltage box integrated board, energy storage high-voltage box and energy storage equipment

Abstract

The embodiment of the utility model provides an energy storage high-voltage box integrated board, which comprises a circuit board substrate, and a power supply input end, a power supply output end, a main positive relay, a total negative relay, a pre-charging relay, a pre-charging resistor, a sampling resistor, a fuse and a signal line terminal which are welded on the circuit board substrate, and is characterized in that the main positive relay is electrically connected between the power supply positive input end and the power supply positive output end; the main negative relay is electrically connected between the power supply negative input end and the power supply negative output end; the pre-charging relay is connected in series with the pre-charging resistor and then is connected in parallel with the main positive relay; the sampling resistor is arranged in the circuit loop; the signal line terminal is used for being connected with an external line to transmit a sampling signal and a control signal; the fuse is connected in series in the circuit loop; the circuit board substrate adopts a double-layer board, and a plurality of strip-shaped windows which are arranged at equal intervals are arranged at element welding positions in the top layer and the bottom layer of the circuit board substrate. The installation is simplified, the cost is reduced, and the installation efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an integrated plate for an energy storage high-voltage box, an energy storage high-voltage box, and an energy storage device. Background Technology

[0002] The high-voltage box is a crucial component of an energy storage system, connecting the battery clusters and the energy storage converter. It plays a vital role in managing, controlling, and protecting the battery clusters, ensuring the safe operation of the energy storage system. Specifically, its functions include collecting information such as the voltage and current of the battery clusters and providing protection against overcurrent, short circuits, and over / under voltage.

[0003] Traditional high-voltage boxes typically employ a distributed layout, with relays, resistors, and other components generally connected via insulated terminals and copper busbars. Modules are connected using wiring harnesses for signal acquisition and control. High-voltage boxes using this layout are often large in size, with complex wiring harnesses. Due to the numerous types and sizes of components, various specifications of insulated terminals and custom-made copper busbars of different sizes are required, leading to high costs. Furthermore, the copper busbars require screw locking, resulting in numerous installation steps, complex wiring harness connections, and poor reliability. Summary of the Invention

[0004] In view of this, the present application provides an integrated plate for an energy storage high-voltage box, an energy storage high-voltage box, and an energy storage device to solve at least one problem existing in the background art.

[0005] In a first aspect, one embodiment of this application provides an integrated board for an energy storage high-voltage box, characterized in that it includes a circuit board substrate and power input terminal, power output terminal, main positive relay, main negative relay, precharge relay, precharge resistor, sampling resistor, fuse, and signal line terminals soldered thereon.

[0006] The power input terminal includes a positive power input terminal and a negative power input terminal, and the power output terminal includes a positive power output terminal and a negative power output terminal. The main positive relay is electrically connected between the positive power input terminal and the positive power output terminal, and the main negative relay is electrically connected between the negative power input terminal and the negative power output terminal. The precharge relay is connected in series with the precharge resistor and then in parallel with the main positive relay.

[0007] The sampling resistor is set in the circuit loop; the signal line terminal is used to connect to the external line to transmit sampling signals and control signals; the fuse is connected in series in the circuit loop; the circuit board substrate is a double-layer board, and several equally spaced strip windows are provided at the component soldering points in the top and bottom layers.

[0008] In conjunction with the first aspect of this application, in an alternative embodiment, the bottom layer of the circuit board substrate is tin-plated with openings.

[0009] In conjunction with the first aspect of this application, in an alternative embodiment, the direction of the window opening is parallel to the direction of current flow.

[0010] In conjunction with the first aspect of this application, in an optional embodiment, the inner coils of the main positive relay, the total negative relay, and the precharge relay are all connected in parallel with freewheeling diodes.

[0011] In conjunction with the first aspect of this application, in an optional embodiment, the wiring width at the window opening position is greater than or equal to 30 mm.

[0012] In conjunction with a first aspect of this application, in an alternative embodiment, the sampling resistor includes a first sampling resistor and a second sampling resistor connected in parallel.

[0013] In conjunction with the first aspect of this application, in an optional embodiment, a loop current sampling point is provided on the circuit board substrate, and the current sampling point is disposed between the first sampling resistor and the second sampling resistor.

[0014] In conjunction with the first aspect of this application, in an alternative embodiment, the copper thickness of the circuit board substrate is 2 ounces or more.

[0015] Secondly, embodiments of this application provide an energy storage high-voltage box, including a box body and an energy storage high-voltage box integrated plate installed in the box body.

[0016] Thirdly, this application provides an energy storage device, including the aforementioned high-voltage energy storage box.

[0017] The energy storage high-voltage box integrated board, energy storage high-voltage box, and energy storage equipment of this application embodiment eliminate the need for traditional copper busbars by using an integrated circuit board, significantly reducing costs and improving installation efficiency. The use of a double-layer board improves the current-carrying capacity of the circuit board. Increasing the trace width on the top and bottom layers of the double-layer board enhances the ability to handle high currents. Multiple equally spaced strip-shaped openings at the solder joints of various components solve the temperature rise problem under high currents and improve heat dissipation. The use of tin plating on the openings on the bottom layer of the circuit board substrate further increases the ability to handle high currents.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 A front view of the integrated plate of the energy storage high-voltage box provided in an embodiment of this application;

[0021] Figure 2 This is a perspective view of an energy storage high-voltage box integrated board according to an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the back of the energy storage high-voltage box integrated plate according to an embodiment of this application;

[0023] Figure 4 for Figure 1 Enlarged view of part B in the middle;

[0024] Figure 5 This is a schematic diagram of the integrated circuit board of an energy storage high-voltage box according to an embodiment of this application;

[0025] Figure 6 A schematic diagram of a high-voltage box provided in an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of an energy storage device provided in an embodiment of this application. Detailed Implementation

[0027] To make the technical solutions and beneficial effects of this application more apparent and understandable, the technical solutions in the embodiments of this application are clearly and completely described below by listing specific examples. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Unless otherwise defined, all technical and scientific terms used herein 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 be limiting of the application.

[0029] It should be noted that the terms "first," "second," etc., used in this application may be used to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another, and not to describe a specific order or sequence. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, not excluding the presence or addition of one or more other features.

[0030] This application provides an integrated board for an energy storage high-voltage box. Please refer to [link / reference]. Figure 1It includes a circuit board substrate and power input terminals, power output terminals, main positive relay RE1, total negative relay RE3, precharge relay RE2, precharge resistors R1 and R2, sampling resistors R3 and R4, fuse FS1 and signal line terminals soldered thereon.

[0031] Please refer to Figure 5 The power input terminals include a positive input terminal CN1 and a negative input terminal CN4, used to connect to the positive and negative terminals of the battery, respectively. The power output terminals, used to connect to the energy storage converter, include a positive output terminal CN2 and a negative output terminal CN3. Optionally, the positive and negative input terminals CN1-CN4 use onboard copper terminals. The main positive relay RE1 is electrically connected between the positive input terminal CN1 and the positive output terminal CN2, used to control the on / off state of the main circuit. The total negative relay RE3 is electrically connected between the negative input terminal CN4 and the negative output terminal CN3, used to control the on / off state of the total negative terminal. The pre-charge resistors include a first pre-charge resistor R1 and a second pre-charge resistor R2 connected in parallel. The pre-charge relay RE2 is used to control the on / off state of the pre-charge branch; it is connected in series with the pre-charge resistor and then in parallel with the main positive relay RE1.

[0032] The main positive relay RE1 includes six terminals. Terminals 1 and 2 are the positive and negative control terminals of RE1, respectively, from which sampling points RE11 and RE12 are led out. RE11 and RE12 are the relay's closing contacts, corresponding to terminals 3 and 4. Terminals 5 and 6 are the relay's feedback terminals, used to monitor whether the relay's closing and opening are normal, from which sampling points RE35 and RE36 are led out. D1 is the freewheeling diode of the main positive relay RE1, forming a circuit with the internal coil of the main positive relay RE1 to release the coil's energy.

[0033] The precharge relay RE2 has four terminals. Terminals 3 and 4 are the negative and positive control terminals of RE2, respectively, from which sampling points RE23 and RE24 are led out. Terminals 1 and 2 are the relay energizing contacts. D2 is the freewheeling diode of RE2. After RE2 is energized, the current flows through precharge resistors R1 and R2 to precharge the load.

[0034] The main positive relay RE3 includes six terminals. Terminals 1 and 2 are the positive and negative control terminals of RE3, respectively, from which sampling points RE31 and RE32 are led out. Terminals 3 and 4 are the closing contacts of relay RE3. Terminals 5 and 6 are the feedback terminals of relay RE3, used to monitor whether the relay's closing and opening are normal, from which sampling points RE15 and RE16 are led out. D3 is the freewheeling diode of the main negative relay RE3, forming a circuit with the internal coil of the main negative relay RE3 to release the coil energy.

[0035] The control voltage for the main positive relay RE1, the main negative relay RE3, and the precharge relay RE2 is 12V.

[0036] Signal line terminals are used to connect to external lines to transmit sampling signals and control signals. There may be one or more signal line terminals. Optionally, the signal line terminals include a first signal line terminal J11 and a second signal line terminal J10, the number of which can be adjusted as needed. The pins of the first signal line terminal J11 and the second signal line terminal J10 are different to avoid incorrect insertion and provide a foolproof effect. The first signal line terminal J10 connects to the positive power sampling point PW+, the negative power sampling point PW-, and the loop current sampling points R+ and R-. TV1 is the battery voltage detection point, used to collect the battery voltage signal; TV2 is the pre-charge voltage detection point, used to collect the pre-charge voltage signal; and TV3 is the negative voltage detection terminal, used to collect the negative power output signal. R+ is the positive terminal of the shunt, and R- is the negative terminal of the shunt, used to collect the main loop current. PW+ is the positive power supply terminal of the DC-DC module, and PW- is the negative power supply terminal of the DC-DC module, used to supply power to an external DC-DC module to generate a 12V voltage.

[0037] The second signal line terminal J10 connects to TV1, TV2, TV3, RE11, RE12, RE15, RE16, RE23, RE24, RE31, RE32, RE35, and RE36, and is used for outputting sampling signals and receiving control signals. Optionally, signal line terminals J10 and J11 can be plug-in, screw-type, spring-loaded, or barrier-type. Optionally, the number of terminals on the first signal line terminal J11 and the second signal line terminal J10 may differ, and / or their insertion directions may differ. By adopting the above-mentioned foolproof design, the workload and error rate during assembly are greatly reduced, and installation efficiency is improved.

[0038] The fuse FS1 is connected in series in the circuit to disconnect when the main circuit current is too high, thus providing protection. Figure 1 One possible installation location is shown where fuse FS1 is electrically connected between the positive power input terminal CN1 and the main positive relay RE1. Fuse FS1 can also be located in other positions in the circuit, such as between the negative power input terminal CN4 and the main negative relay RE3, between the main positive relay RE1 and the positive power output terminal CN2, or between the main negative relay RE3 and the negative power output terminal CN3. Optionally, fuse FS1 is a 100A fuse.

[0039] The circuit board substrate is a double-layer board (double-sided board), consisting of a top and a bottom copper-clad layer, electrically connected vias. This double-layer routing design enhances the circuit's ability to handle high currents. Several evenly spaced strip-shaped openings are provided at the component soldering points on both the top and bottom layers. The trace width at these openings is greater than or equal to 30mm. Openings involve removing the coating layer covering the copper clad layer in specific areas of the PCB board, exposing the conductors. For example... Figures 1-3 As shown, several equally spaced strip-shaped openings are provided at the solder joints of the power input terminals CN1 and CN4, power output terminals CN2 and CN3, main positive relay RE1, total negative relay RE3, precharge relay RE2, precharge resistors R1 and R2, sampling resistors R3 and R4, and fuse FS1 on both the top and bottom layers of the circuit board substrate. Because the current flowing through the components in the high-voltage box is very large, by using an opening design on both the top and bottom layers and increasing the trace width at the opening positions, the circuit board's current carrying capacity and heat dissipation are improved. Optionally, the copper thickness of the circuit board substrate is 2 ounces or more to improve the current carrying capacity of the circuit board. Optionally, such as... Figure 3 As shown, the bottom layer of the circuit board substrate has tin-plated windows to further improve its ability to handle high currents. The direction of the windows is parallel to the current flow direction, and the tin plating increases the cross-sectional area, thereby improving the ability to handle high currents.

[0040] The sampling resistor is placed in the circuit loop to collect the loop current. The sampling resistor includes a first sampling resistor R3 and a second sampling resistor R4 connected in parallel. Figure 1 One possible location for the sampling resistor is shown: it is electrically connected between the negative power input terminal CN4 and the main negative relay RE3. It can also be located in other positions in the loop, such as between the negative power input terminal CN4 and the main negative relay RE3, between the main positive relay RE1 and the positive power output terminal CN2, or between the main negative relay RE3 and the negative power output terminal CN3. A loop current sampling point is provided on the circuit board substrate, located between the first sampling resistor R3 and the second sampling resistor R4. For example... Figure 4 As shown, the two lines extending from below R4 between R3 and R4 represent the current sampling points. Selecting the sampling points between the two resistors avoids voltage differences, which could lead to sampling errors and improves current sampling accuracy.

[0041] The working principle of the energy storage high-voltage box integrated board in this embodiment is as follows: When the system starts, the RE3 relay is controlled to engage. The RE3 feedback terminals RE35 and RE36 detect whether the engagement is normal. If normal, the pre-charge relay RE2 is controlled to engage, and the system pre-charges the load through the pre-charge resistors R1 and R2. When the TV2 terminal detects that the load has reached the pre-charge voltage, the main relay RE1 is controlled to close, and the system supplies power to the load through RE1. The RE1 feedback terminal detects whether the relay is engaged normally. If RE1 is engaged normally, the pre-charge relay RE2 is controlled to open. When the current detection terminals R+ and R- are detected to be too high, the system enables the power forced disconnection logic, controls the main negative relay RE3 to open and detects whether the disconnection is normal. If the main negative relay RE3 cannot open normally, the main positive relay RE1 is controlled to open forcibly. If the system fails and the circuit current exceeds 100A, the fuse FS1 blows, providing circuit protection.

[0042] The energy storage high-voltage box integrated board of this application adopts an integrated circuit board, eliminating the need for traditional copper busbars, significantly reducing costs and improving installation efficiency. The use of a double-layer board improves the current-carrying capacity of the circuit board. Increasing the trace width on the top and bottom layers of the double-layer board enhances the overcurrent capability. Multiple equally spaced strip windows at the solder joints of each component solve the temperature rise problem under high current and improve heat dissipation. Tin plating on the windows on the bottom layer of the circuit board further increases the overcurrent capability. All components on the integrated circuit board are surface-mount, using PCB current carrying capacity, thus reducing the types of materials and alleviating warehouse management costs. Control and acquisition lines are integrated on-board, with two external interfaces, reducing the types of wiring harnesses and saving wiring harness assembly time. The two interfaces, J10 and J11, employ a foolproof design to reduce wiring errors and improve overall installation efficiency. By setting the current sampling point between the first sampling resistor R3 and the second sampling resistor R4, voltage difference is avoided, improving current sampling accuracy.

[0043] One embodiment of this application also provides an energy storage high-voltage box, including a box body 10 and an energy storage high-voltage box integrated plate of any of the above embodiments installed in the box body 10. The energy storage high-voltage box can be used for household energy storage devices, balcony energy storage devices, portable energy storage devices, etc.

[0044] One embodiment of this application also provides an energy storage device, including the aforementioned high-voltage energy storage box. For example... Figure 7 As shown, the energy storage equipment, from top to bottom, consists of an energy storage converter box 20, an energy storage high-voltage box 10, and a battery box 30. The energy storage equipment can be residential energy storage, balcony energy storage, portable energy storage, etc.

[0045] The relevant content of each unit in this embodiment can be referred to the relevant content of the units with the same reference numerals in any of the foregoing embodiments, and will not be repeated here.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An integrated board for an energy storage high-voltage box, characterized in that, This includes the circuit board substrate and the power input terminals, power output terminals, main positive relay, main negative relay, precharge relay, precharge resistor, sampling resistor, fuse, and signal line terminals soldered onto it. The power input terminal includes a positive power input terminal and a negative power input terminal, and the power output terminal includes a positive power output terminal and a negative power output terminal. The main positive relay is electrically connected between the positive power input terminal and the positive power output terminal, and the main negative relay is electrically connected between the negative power input terminal and the negative power output terminal. The precharge relay is connected in series with the precharge resistor and then in parallel with the main positive relay. The sampling resistor is set in the circuit loop; the signal line terminal is used to connect to the external line to transmit sampling signals and control signals; the fuse is connected in series in the circuit loop; the circuit board substrate is a double-layer board, and several equally spaced strip windows are provided at the component soldering points in the top and bottom layers.

2. The energy storage high-voltage box integrated plate according to claim 1, characterized in that, The bottom layer of the circuit board substrate is tin-plated with windows.

3. The energy storage high-voltage box integrated plate according to claim 1, characterized in that, The direction of the window opening is parallel to the direction of current flow.

4. The energy storage high-voltage box integrated plate according to claim 1, characterized in that, The inner coils of the main positive relay, the main negative relay, and the precharge relay are all connected in parallel with freewheeling diodes.

5. The energy storage high-voltage box integrated plate according to claim 1, characterized in that, The wiring width at the window opening location is greater than or equal to 30mm.

6. The energy storage high-voltage box integrated plate according to claim 1, characterized in that, The sampling resistors include a first sampling resistor and a second sampling resistor connected in parallel.

7. The energy storage high-voltage box integrated plate according to claim 6, characterized in that, The circuit board substrate is provided with a loop current sampling point, which is located between the first sampling resistor and the second sampling resistor.

8. The energy storage high-voltage box integrated plate according to claim 1, characterized in that, The copper thickness of the circuit board substrate is 2 ounces or more.

9. A high-voltage energy storage box, characterized in that, It includes a housing and an integrated plate for energy storage high-voltage boxes according to any one of claims 1-8 installed in the housing.

10. An energy storage device, characterized in that, Includes the energy storage high-voltage box as described in claim 9.

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