Energy storage battery pack with DCDC boost module

Abstract

The utility model belongs to the field of battery pack especially one energy storage battery pack containing DCDC boost module, and the existing battery pack needs to replace the high voltage control box of different voltage for different high pressure, and the volume of high voltage component is big, and the problem that the control box occupies space is obvious, and the following scheme is presented, it includes the case, the inside of case is provided with DCDC module, fire control module, filter, upper stack terminal, lower stack terminal, battery group I and battery group II, the side fixed setting of DCDC module has even distribution's multiple radiating fins, in the utility model, through the setting of DCDC module, it is cost -effective, reduces the risk, improves the performance, increases the versatility, reduces the outside interference, simplifies the framework and reduces the operation and maintenance cost to adapt to the mixed scene of multiple brand equipment, can also replace the high voltage control box core function in the energy storage system, further simplifies the framework, design and assembly process, reduces the risk of multiple component connection failure.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to an energy storage battery pack containing a DC-DC boost module. Background Technology

[0002] High-voltage three-phase home energy storage systems are integrated energy management solutions that achieve efficient storage and flexible distribution of household electricity through three-phase AC power technology. They mainly consist of high-voltage battery packs (such as lithium iron phosphate batteries, supporting a wide voltage range of 150-800V), three-phase inverters, intelligent management systems (EMS), and smart meters. Their high power output, economy, and safety make them outstanding in household electricity use, emergency backup power, and grid interaction.

[0003] Currently available energy storage battery packs on the market can boost low-voltage DC power to the high voltage required by the inverter through parallel stacking of lithium batteries and a customized DC-DC boost module in the high-voltage control box to meet drive or grid connection needs. However, they cannot escape the dilemma of high customization cost and weak versatility. Different high-voltage control boxes need to be replaced for different high voltages, and the high-voltage components are roughly the same size as the control box, which occupies a significant amount of space. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the need to replace high-voltage control boxes with different ones for different high voltages, and the large size of high-voltage components, which results in significant space occupation by the control box. The invention proposes an energy storage battery pack with a DC-DC boost module.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An energy storage battery pack with a DC-DC boost module includes: The chassis contains a DC-DC module, a fire suppression module, a filter, upper stacking terminals, lower stacking terminals, battery pack I and battery pack II. Multiple heat dissipation fins are fixedly installed on one side of the DC-DC module.

[0006] In one possible design, a side cover is fixedly provided on the open side of the chassis, and a rectangular opening is provided on one side of the side cover, through which the heat dissipation fins extend to the outside of the side cover.

[0007] In one possible design, battery pack I is fixedly mounted on the bottom wall of the chassis, and battery pack II is fixedly mounted on the top of battery pack I.

[0008] In one possible design, a mounting bracket is fixedly installed on one side of the chassis near the exterior of battery pack I and battery pack II, and the DC-DC module, fire suppression module and filter are fixedly installed on one side of the mounting bracket.

[0009] In one possible design, the upper stacking terminals are embedded at the top of the chassis, and the lower stacking terminals are embedded at the bottom of the chassis.

[0010] In one possible design, lower mounting brackets are fixedly installed on both sides of the bottom of the chassis, and upper mounting brackets are fixedly installed on both sides of the top of the chassis.

[0011] In this application, upon initial use, the chassis and internal components are first connected. Battery pack I is fixedly mounted on the bottom wall of the chassis, and battery pack II is fixedly mounted on the top of battery pack I. The two are connected in series internally to form an integrated battery module system, providing stable low-voltage DC power to the subsequent circuits (each battery module uses grade A 3.2V 102AH lithium iron phosphate cells, 16 of which are connected in series to form a 51.2V 100AH ​​battery module. After the two battery modules are connected in series, they provide a stable power foundation for the entire battery pack). The battery module outputs 51...A 2V low-voltage DC power supply is connected to the input of the DC-DC module via a wire. The DC-DC module uses a phase-shifted full-bridge boost topology to boost the input low-voltage DC power. During connection, it is essential to ensure that the wire specifications meet the current transmission requirements to avoid overheating or even safety hazards caused by excessively thin wires. Simultaneously, the connection points must be secure and reliable to prevent poor contact that could affect power transmission efficiency. The -V high-voltage DC power supply, boosted by the DC-DC module, is then connected to the input of a filter via a wire. The filter internally uses capacitors, inductors, and other filtering components to filter the input high-voltage DC power. The filter removes ripple from the battery module's output voltage and high-frequency interference signals generated during the DC-DC module's boost process, outputting stable and clean DC power. During connection, careful attention must be paid to the selection of wires and the reliability of connection points to ensure the filter functions properly and guarantees the power quality and operational stability of the entire energy storage system. The upper stacking terminals are embedded at the top of the chassis, and the lower stacking terminals are embedded at the bottom. The upper stacking terminals are connected to the circuitry of components such as Battery Pack I, Battery Pack II, and the DC-DC module inside the battery pack via wires, ensuring current transmission between internal components. The lower stacking terminals are also connected via wires... It connects to internal components and provides interfaces for external connections (during connection, the upper stacking terminals are soldered to the corresponding output terminals of components such as battery modules and DC-DC modules using wires or connectors to ensure a secure connection and stable current transmission). When multiple battery packs need to be stacked vertically for expansion, the upper stacking terminals of one battery pack are connected to the lower stacking terminals of another battery pack using dedicated connectors or wires. This connection method not only achieves electrical connection between multiple packs but also enables signal exchange, meeting the capacity or power expansion requirements of the energy storage system. During the connection process, it is essential to strictly follow the connection specifications. To ensure correct connections and avoid short circuits or other malfunctions caused by incorrect connections, the fire suppression module connects to the battery module via built-in temperature and smoke sensors. These sensors, installed near the battery module, monitor its temperature and smoke levels in real time. Upon detecting abnormal signals, such as a sudden temperature rise or the generation of flammable gases, the fire suppression module will quickly trigger a response, issuing an alarm through its internal device and taking appropriate fire suppression measures to prevent the fire from spreading from a single cell to the entire battery pack. During connection, ensure good contact between the sensors and the battery module to accurately detect changes in the battery module's status. During operation, the cells in battery packs I and II are connected in series to output a 51.2V low-voltage DC power. This power is transmitted through wires to the input of the DC-DC module, providing it with operating power. Upon receiving the low-voltage DC power, the DC-DC module activates its internal boost topology (such as a phase-shifted full-bridge) to gradually boost the 51.2V DC power to a 330-460V high-voltage DC power. During this boosting process, multiple heat sinks fixed on one side of the DC-DC module begin to dissipate the heat generated by high-power components (such as IGBTs), ensuring boost efficiency (typically 90%-96%) and long-term module reliability. The boosted high-voltage DC power is then transmitted through wires to the input of a filter. The filter uses internal capacitors, inductors, and other filtering components to filter the input high-voltage DC power, removing ripple and high-frequency interference signals, resulting in a stable and clean output DC power. This ensures the quality of the output power and prevents voltage fluctuations or interference from damaging downstream inverters and other equipment, thus guaranteeing the overall system performance. To ensure the stable operation of the energy storage system, the fire suppression module uses built-in temperature and smoke sensors to monitor the temperature and smoke levels of battery packs I and II in real time. Upon detecting any abnormal signals, such as a temperature exceeding a set threshold or smoke, the fire suppression module immediately triggers the alarm, alerting maintenance personnel to handle the situation promptly. Simultaneously, the fire suppression module takes appropriate fire extinguishing measures (such as releasing extinguishing gases) according to a pre-set program to prevent the fire from spreading further and ensure the safety of the battery packs. When it is necessary to increase the capacity or power of the energy storage system, multiple battery packs can be stacked vertically. The upper stacking terminal of one battery pack is connected to the lower stacking terminal of another battery pack using a dedicated connector or wire. This not only achieves electrical connection between multiple packs, allowing current to flow between them, but also enables signal exchange, facilitating unified management and control of the entire energy storage system. The connection between the upper and lower stacking terminals meets the different capacity and power requirements of the energy storage system while simplifying the installation and maintenance process.

[0012] This utility model has the following beneficial effects: This invention, through the setting of a DC-DC module, eliminates the need for a custom boost module and related structures in the control box, reducing space and cost, and minimizing the risk of failure. It enables dynamic parameter adjustment, efficient boosting, and flexible load matching, improving versatility, reducing external interference, enhancing adaptability and economy, simplifying the architecture, and reducing operation and maintenance costs. It is suitable for scenarios involving mixed use of multiple brands of equipment and can also replace the core boosting function of the high-voltage control box in energy storage systems, eliminating the need for a high-voltage control box, simplifying the system architecture, circuit design, and assembly process, and reducing the risk of failure caused by connecting multiple components.

[0013] In this invention, by setting up heat dissipation fins, a large amount of heat is generated by high-power components during the process of the DC-DC module boosting low-voltage DC power. The heat dissipation fins can dissipate this heat in a timely manner, effectively reducing the component temperature and preventing the component performance from deteriorating, lifespan shortened, or even damaged due to excessive temperature. This ensures that the DC-DC module's boost efficiency is maintained at a high level, while also ensuring the long-term stable and reliable operation of the module, thereby improving the working performance and stability of the entire energy storage battery pack. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall main structure of an energy storage battery pack containing a DC-DC boost module proposed in this utility model. Figure 2 This is a bottom view of the overall structure of an energy storage battery pack containing a DC-DC boost module proposed in this utility model. Figure 3 This is a side view of the overall structure of an energy storage battery pack containing a DC-DC boost module proposed in this utility model. Figure 4 This is a schematic diagram showing the overall disassembled structure of an energy storage battery pack containing a DC-DC boost module proposed in this utility model.

[0015] In the diagram: 1. Chassis; 101. Lower mounting bracket; 102. Upper mounting bracket; 2. Side cover; 201. Rectangular opening; 3. DC-DC module; 4. Heat sink fins; 5. Fire suppression module; 6. Filter; 7. Upper stacking terminal; 8. Lower stacking terminal; 9. Battery pack I; 10. Battery pack II. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] In one embodiment Reference Figure 1-4 Energy storage battery pack, including: The components include a chassis 1, a side cover 2, a DC-DC module 3, heat sink fins 4, a fire suppression module 5, a filter 6, an upper stacking terminal 7, a lower stacking terminal 8, battery pack I 9, battery pack II 10, a lower mounting base 101, and an upper mounting base 102. The chassis 1 serves as the main structure of the entire energy storage battery pack, providing installation and protection space for the internal components. The side cover 2 is fixedly installed on its open side by bolts or other means. The side cover 2 has a rectangular opening 201 for the heat sink fins 4 to pass through. The lower mounting bases 101 are fixedly installed on both sides of the bottom of the chassis 1, and the upper mounting bases 102 are fixedly installed on both sides of the top. These mounting bases facilitate the fixing and positioning of the battery pack in the installation environment.

[0018] Battery pack I9 is ​​fixed to the bottom wall of chassis 1 by bolts, while battery pack II10 is fixed to the top of battery pack I9 by bolts. Both use grade A 3.2V 102AH lithium iron phosphate cells, and 16 cells are connected in series to form a 51.2V 100AH ​​battery module, which provides stable low-voltage DC power to DC-DC module 3.

[0019] The DC-DC module 3 is mounted on a mounting bracket on one side of the chassis 1, near the exterior of battery packs I9 and II10. This mounting bracket is bolted to the chassis 1. The DC-DC module 3 employs a phase-shifted full-bridge DC-DC boost topology, capable of boosting the 51.2V low-voltage DC output from the battery modules to a 330-460V high-voltage DC. Multiple evenly distributed heat dissipation fins 4 are fixedly mounted on one side of the module. These fins extend through rectangular openings 201 on the side cover 2 to the outside of the side cover 2. During operation, high-power components (such as IGBTs) generate heat, which the heat dissipation fins 4 effectively dissipate, ensuring the DC-DC module's power supply is maintained. The boost efficiency of module 3 (typically 90%-96%) and long-term reliability are enhanced because the DC-DC module 3 is built into the battery pack and housed in the same enclosed casing as the battery module. This reduces interference from external environmental factors such as vibration, humidity, and dust. At the same time, the built-in DC-DC module 3 can dynamically adjust the boost parameters according to the real-time battery voltage, avoiding efficiency losses caused by the mismatch between the external fixed boost module and the battery voltage. Especially when the battery is low in power, it can more efficiently boost low-voltage energy to the voltage required by the load. It can also flexibly match loads with different voltage requirements without replacing the entire battery pack or modifying external boost equipment due to changes in load voltage, thus improving the versatility of the battery pack.

[0020] Filter 6 is also installed on one side of the mounting bracket. It contains filtering components such as capacitors and inductors. Filter 6 can filter out the ripple in the output voltage of the battery module and the high-frequency interference signal generated during the boost process of the DC-DC module 3, outputting stable and clean DC power, avoiding voltage fluctuations or interference from damaging the inverter, and ensuring the power quality and operational stability of the entire energy storage system.

[0021] The upper stacking terminal 7 is embedded in the top of the chassis 1, and the lower stacking terminal 8 is embedded in the bottom of the chassis 1. These stacking terminals serve as physical connection and expansion interfaces. On the one hand, they enable the circuit connection of each component inside a single battery pack, such as the battery module and the DC-DC module 3, through internal wiring to ensure current transmission. On the other hand, they support the vertical stacking expansion of multiple battery packs, facilitating the rapid realization of electrical connections and signal interaction between multiple packs through the terminals. This meets the capacity or power expansion requirements of the energy storage system and simplifies the installation and maintenance process.

[0022] This application can be used in the field of energy storage battery pack technology containing DC-DC boost modules, and can also be used in other fields applicable to this application.

[0023] In another embodiment, refer to Figure 4 This invention relates to an energy storage battery pack containing a DC-DC boost module. The structure of this embodiment is basically the same as the aforementioned embodiments, except that the fire suppression module 5 is also fixedly mounted on one side of the mounting bracket. It has built-in temperature and smoke sensors, enabling real-time monitoring of the battery pack's internal state. When abnormal signals such as a sudden temperature rise or the generation of flammable gases are detected, a rapid response can be triggered in the early stages of thermal runaway, preventing the fire from spreading from a single cell to the entire battery pack. This achieves early warning of thermal runaway and improves the safety of the battery pack.

[0024] However, as is well known to those skilled in the art, the working principles and wiring methods of DC-DC module 3, fire protection module 5, filter 6, upper stacking terminal 7, lower stacking terminal 8, battery pack I 9, and battery pack II 10 are all conventional methods or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0025] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An energy storage battery pack containing a DC-DC boost module, characterized in that, include: The chassis (1) is equipped with a DC-DC module (3), a fire suppression module (5), a filter (6), an upper stack terminal (7), a lower stack terminal (8), a battery pack I (9) and a battery pack II (10). The DC-DC module (3) is fixedly provided with a plurality of evenly distributed heat dissipation fins (4) on one side.

2. The energy storage battery pack containing a DC-DC boost module according to claim 1, characterized in that, The chassis (1) has a side cover (2) fixedly installed on the open side. A rectangular opening (201) is provided on one side of the side cover (2). The heat dissipation fins (4) extend through the rectangular opening (201) to the outside of the side cover (2).

3. The energy storage battery pack containing a DC-DC boost module according to claim 1, characterized in that, The battery pack I (9) is fixedly installed on the bottom wall of the chassis (1), and the battery pack II (10) is fixedly installed on the top of the battery pack I (9).

4. The energy storage battery pack containing a DC-DC boost module according to claim 1, characterized in that, A mounting bracket is fixedly installed on one side of the chassis (1) near the outside of battery pack I (9) and battery pack II (10), and the DC-DC module (3), fire protection module (5) and filter (6) are fixedly installed on one side of the mounting bracket.

5. The energy storage battery pack containing a DC-DC boost module according to claim 1, characterized in that, The upper stacking terminal (7) is embedded in the top of the chassis (1), and the lower stacking terminal (8) is embedded in the bottom of the chassis (1).

6. The energy storage battery pack containing a DC-DC boost module according to claim 4, characterized in that, The bottom two sides of the chassis (1) are fixedly provided with lower mounting bases (101), and the top two sides of the chassis (1) are fixedly provided with upper mounting bases (102).

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