A home energy storage integrated machine

Abstract

This utility model relates to a home energy storage integrated machine, comprising a housing, a battery pack and a controller housed within the housing, and a control panel and wiring panel of the controller extending to the surface of the housing. The battery pack is electrically connected to the controller. The battery pack consists of two or more batteries, which are connected to each other via a first control relay and a second control relay. The positive terminals of two adjacent batteries are connected to the common terminal and normally open terminal of the first control relay, respectively, and the negative terminals of two adjacent batteries are connected to the common terminal and normally open terminal of the second control relay, respectively. The normally closed terminal of the second control relay is connected to the normally closed terminal of the first control relay. The controller synchronously operates the first and second control relays via commands, thereby changing the battery connection method. Users can freely choose the operating mode according to the grid status, load demand, or electricity pricing strategy, significantly improving energy utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of integrated energy storage machines, and in particular to a home integrated energy storage machine. Background Technology

[0002] As a key component of distributed energy systems, integrated home energy storage systems typically consist of a casing, a built-in battery pack, and a controller. By integrating photovoltaic input, grid interaction, and load management functions, they achieve optimized scheduling of household electricity consumption. Their battery packs often employ fixed series-parallel battery modules, with the charging and discharging process centrally managed by the controller, providing backup power or peak-valley electricity price arbitrage services for residences.

[0003] In existing integrated energy storage devices, the battery packs only support a single series or parallel connection mode. They cannot dynamically switch configurations according to actual scenarios, such as high power demand or long-term power supply. This leads to increased safety risks in high-voltage scenarios or insufficient capacity utilization in low-voltage scenarios. If the connection method needs to be changed, manual adjustment of cables is required, which is cumbersome and cannot meet the rapid response requirements in the event of sudden power outages or load changes. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a home energy storage integrated machine that can effectively solve the technical problem of only supporting a single series or parallel mode.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A home energy storage unit includes a casing, within which a battery pack and a controller are housed. The controller's control panel and wiring panel extend to the surface of the casing. The battery pack is electrically connected to the controller. The battery pack consists of two or more batteries. Adjacent batteries are connected via a first control relay and a second control relay. The positive terminals of two adjacent batteries are connected to the common terminal and normally open terminal of the first control relay, respectively. The negative terminals of two adjacent batteries are connected to the common terminal and normally open terminal of the second control relay, respectively. The normally closed terminal of the second control relay is connected to the normally closed terminal of the first control relay. The normally closed terminal of the first control relay is not connected to any circuit. The positive terminal of the first battery in the battery pack is connected to the controller, and the negative terminal of the last battery in the battery pack is connected to the controller. Both the first and second control relays are connected to the controller.

[0007] Furthermore, the controller is connected to a voltage detection circuit, which is connected in parallel to the positive terminal of the first battery and the negative terminal of the last battery.

[0008] Furthermore, a current sensor is connected between the battery pack and the controller.

[0009] Furthermore, a thermal fuse is connected in series with the negative terminal of each battery in the battery pack.

[0010] Furthermore, the battery pack is detachably mounted inside the housing via a battery frame, and the surface of the housing is provided with a cover plate for covering the battery frame and a sealing cover plate, which is connected to the housing via a snap fastener.

[0011] Furthermore, the battery frame is provided with a number of battery slots equal to the number of batteries. The inner wall of the battery slot is provided with positive and negative terminals. The first control relay and the second control relay are fixedly installed on the surface of the battery frame and are connected to the positive and negative terminals.

[0012] Compared with existing technologies, the beneficial effects of this utility model are: it realizes dynamic switching between series and parallel connection of batteries; by synchronously operating the first and second control relays through controller commands, the connection method of the batteries can be changed; users can freely choose the working mode according to the grid status, load demand, or electricity pricing strategy, significantly improving energy utilization efficiency. In series mode, it is suitable for starting high-power equipment such as air conditioners and charging piles, reducing transmission losses. In parallel mode, it extends the power supply time of basic loads such as lighting and security, improving battery capacity utilization. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention;

[0014] Figure 2 This is a right view of the sealing cover plate after it has been removed in this utility model.

[0015] Figure 3 This is a schematic diagram of the series connection mode in this utility model;

[0016] Figure 4 This is a schematic diagram of the parallel connection mode in this utility model;

[0017] The numbers in the diagram are: 1-outer casing, 2-control panel, 3-wiring panel, 4-battery, 5-battery frame, 6-sealing cover, 7-first control relay, 8-second control relay, 9-thermal fuse. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] The following is combined with Figures 1-4 A detailed description of a home energy storage integrated machine according to this utility model is provided below:

[0020] A home energy storage unit includes a housing 1, within which a battery pack and a controller are housed. The controller's control panel 2 and subsequent wiring panel 3 extend to the surface of the housing 1. The battery pack is electrically connected to the controller. The battery pack consists of two batteries 4. Adjacent batteries 4 are connected via a first control relay 7 and a second control relay 8. The positive terminals of the two adjacent batteries 4 are connected to the common terminal and normally open terminal of the first control relay 7, respectively. The negative terminals of the two adjacent batteries 4 are connected to the common terminal and normally open terminal of the second control relay 8, respectively. The normally closed terminal of the second control relay 8 is connected to the normally closed terminal of the first control relay 7. The normally closed terminal of the first control relay 7 is not connected to any circuit. The positive terminal of the first battery 4 in the battery pack is connected to the controller, and the negative terminal of the last battery 4 in the battery pack is connected to the controller. Both the first control relay 7 and the second control relay 8 are connected to the controller.

[0021] The battery pack is detachably mounted inside the housing 1 via a battery frame 5. The surface of the housing 1 is provided with a cover for the battery frame 5 and a sealing cover 6. The sealing cover 6 is connected to the housing 1 via snap-fit ​​fasteners. The modular design of the battery frame 5 allows the entire battery pack, including the battery 4 and the relay integrated on the frame, to be easily removed or installed from the housing 1 as a single unit, greatly simplifying the maintenance, replacement, or upgrade process. The sealing cover 6 is secured by snap-fit ​​fasteners, allowing for quick opening for easy access to the battery frame 5 and reliable closing, enabling rapid restoration of the equipment's sealing performance after maintenance.

[0022] The battery frame 5 has a number of battery slots equal to the number of batteries 4. Batteries 4 slide into the battery slots, making the installation, removal, and replacement of individual batteries extremely simple and quick. The inner wall of the battery slots has positive and negative terminals, automatically establishing a reliable electrical connection when a battery 4 is inserted. This avoids tedious manual wiring, reduces the risk of wiring errors, and improves installation efficiency and connection reliability. The first control relay 7 and the second control relay 8 are fixedly mounted on the surface of the battery frame 5, connecting to the positive and negative terminals. The relays are directly fixed to the surface of the battery frame 5 and connected to the slot interfaces. This not only significantly simplifies the overall wiring complexity inside the casing 1 and improves production and assembly efficiency, but also makes the internal structure of the equipment neater and more organized, facilitating heat dissipation and later maintenance. During replacement, the entire frame and wiring can be replaced together.

[0023] Each battery 4 in the battery pack has a thermal fuse 9 connected in series at its negative terminal, providing a final physical safety barrier for each individual cell. When a battery 4 experiences an abnormal temperature rise due to internal faults, external short circuits, or severe overcurrent, its corresponding thermal fuse 9 will quickly melt, permanently cutting off the current circuit of the faulty battery. The fuse's melting effectively isolates the faulty battery from the battery pack, preventing it from overheating, catching fire, or even exploding, and avoiding the spread of the fault to other healthy batteries 4 or the entire system, significantly improving the system's safety and reliability. The thermal fuse 9 extends to the surface of the battery frame 5, allowing for convenient visual inspection of the fuse's condition or replacement during maintenance without deep disassembly, reducing maintenance difficulty and cost.

[0024] Series mode: When the normally open terminals of the first control relay 7 and the second control relay 8 are closed, the positive terminals of the two batteries 4 are connected to each other, and the negative terminals are connected to each other.

[0025] Parallel mode: The normally open terminals of the first control relay 7 and the second control relay 8 are disconnected, and the positive and negative terminals of the two batteries 4 are connected.

[0026] This system enables dynamic switching between series and parallel connections for battery 4. By synchronously operating the first control relay 7 and the second control relay 8 via controller commands, the connection method of battery 4 can be changed. Users can freely choose the operating mode based on grid conditions, load demand, or electricity pricing strategies, significantly improving energy efficiency. In series mode, it is compatible with the startup of high-power equipment such as air conditioners and charging piles, reducing transmission losses. In parallel mode, it extends the power supply duration for basic loads such as lighting and security systems, improving battery capacity utilization.

[0027] The controller is connected to a voltage detection circuit, which is connected in parallel to the positive terminal of the first battery (4) and the negative terminal of the last battery (4). This voltage detection circuit can accurately measure the total output voltage of the entire battery pack in real time, regardless of whether it is connected in series or parallel, providing crucial voltage feedback to the controller. Precise total voltage data is essential for the controller to manage charging and discharging, calculate remaining capacity and health status, and helps in developing more optimized energy dispatch strategies and improving energy management.

[0028] A current sensor is connected between the battery pack and the controller. The current sensor can accurately measure the total current flowing into or out of the battery pack, enabling the controller to monitor the charging and discharging power and rate of the system in real time. When the current exceeds the safety threshold, the controller can quickly cut off the circuit or adjust the relay status, effectively protecting the battery, relay and downstream equipment from damage caused by high current.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A household energy storage all-in-one machine, comprising a shell, a battery pack and a controller are arranged in the shell, a control panel of the controller and a wiring panel extend to the surface of the shell, the battery pack is electrically connected with the controller, characterized in that: The battery pack consists of two or more batteries. Adjacent batteries are connected via a first control relay and a second control relay. The positive terminals of two adjacent batteries are connected to the common terminal and normally open terminal of the first control relay, respectively. The negative terminals of two adjacent batteries are connected to the common terminal and normally open terminal of the second control relay, respectively. The normally closed terminal of the second control relay is connected to the normally closed terminal of the first control relay. The normally closed terminal of the first control relay is not connected to any circuit. The positive terminal of the first battery in the battery pack is connected to the controller, and the negative terminal of the last battery in the battery pack is connected to the controller. Both the first control relay and the second control relay are connected to the controller.

2. The household energy storage all-in-one machine according to claim 1, characterized in that: The controller is connected to a voltage detection circuit, which is connected in parallel to the positive terminal of the first battery and the negative terminal of the last battery.

3. The household energy storage all-in-one machine according to claim 1, characterized in that: A current sensor is connected between the battery pack and the controller.

4. The household energy storage all-in-one machine according to claim 1, characterized in that: Each battery in the battery pack has a thermal fuse connected in series at its negative terminal.

5. The home energy storage all-in-one machine according to any one of claims 1-4, characterized in that: The battery pack is detachably mounted inside the housing via a battery frame. The surface of the housing is provided with a cover plate for covering the battery frame and a sealing cover plate, which is connected to the housing via a snap fastener.

6. The household energy storage all-in-one machine according to claim 5, characterized in that: The battery frame has a number of battery slots equal to the number of batteries. The inner wall of the battery slots has positive and negative terminals. The first control relay and the second control relay are fixedly installed on the surface of the battery frame and are connected to the positive and negative terminals.

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