A multi-energy complementary power plant battery for energy storage

Abstract

This invention provides a storage battery for multi-energy complementary power plants, relating to the field of energy storage battery technology. It includes a main battery component with two pressure relief control components mounted on it. These two pressure relief control components are used to control circuit breaking. Each of the two pressure relief control components has a connecting component at its bottom. The two connecting components are used to connect to the positive and negative terminals of the main battery component. By using copper busbar connectors in conjunction with the pressure relief control components, automatic circuit breaking can be achieved by utilizing an upward-moving piston column when the pressure inside the battery casing increases. This further reduces safety hazards, and timely circuit breaking can prevent loose connections between the electrode plates and the positive and negative electrode cores when the main battery component bulges. This solves the problem that current multi-energy complementary power plant storage batteries are not easy to automatically control for pressure relief and circuit breaking when the battery bulges, resulting in poor safety.

Description

Technical Field

[0001] This application relates to the field of energy storage battery technology, and in particular to a battery for energy storage in multi-energy complementary power plants. Background Technology

[0002] To alleviate peak-shaving pressure on the power grid, power plants are increasingly equipped with more comprehensive energy storage facilities for electricity storage. The power sources typically include wind power and photovoltaic power. When energy storage is carried out through batteries, the frequent adjustment of the power source requires high charging and discharging performance of the batteries. Currently, multi-energy complementary power plants use battery packs as the unit for risk control. Under long-term frequent charging and discharging conditions, individual battery cells are prone to bulging, which can easily lead to loose connections between the positive and negative electrodes, increasing the risk of arcing. When batteries bulge, they are also prone to electrolyte leakage or explosion, creating safety hazards. It is not convenient to automatically control the pressure relief and circuit disconnection when batteries bulge, resulting in poor safety. At the same time, it is also not convenient to detect battery leakage. Even if the battery does not bulge, the leaked electrolyte can corrode surrounding batteries, affecting battery safety. Summary of the Invention

[0003] This application relates to a storage battery for energy storage in multi-energy complementary power plants, which solves the problem that current storage batteries for energy storage in multi-energy complementary power plants are not easy to automatically control to release pressure and disconnect the circuit when the battery bulges, resulting in poor safety.

[0004] In a first aspect, this application provides a storage battery for multi-energy complementary power plants, specifically comprising a battery body, on which two pressure relief control components are installed; the two pressure relief control components are used to control circuit breaking; each of the two pressure relief control components has a connecting component installed at its bottom; the two connecting components are respectively used to connect to the positive and negative terminals of the battery body; each of the two pressure relief control components has a power failure fuse installed; each of the two pressure relief control components has a copper busbar connector installed; a electrolyte filling component is fixedly installed on the battery body; the battery body includes a battery casing and a top cover, with the top cover fixedly installed on the top of the battery casing; the battery casing is filled with electrolyte.

[0005] In at least some embodiments, the battery body further includes: positive and negative electrode cores, and the positive and negative electrode cores are sleeved inside the battery casing.

[0006] In at least some embodiments, the pressure relief control component includes: a pressure relief mounting cylinder and a pressure relief pipe, the pressure relief pipe being connected to a flexible hose, and the flexible hose connected to the pressure relief pipe leading out of the battery pack housing; the pressure relief mounting cylinder is fixedly mounted on the top cover; the pressure relief mounting cylinder communicates with the inside of the battery housing; and a pressure relief pipe is fixedly mounted on the side of the pressure relief mounting cylinder.

[0007] In at least some embodiments, the pressure relief control component further includes: a piston rod, a limiting groove, a flashlight, and a contact spring. The piston rod is slidably sleeved inside the pressure relief mounting cylinder, and a sealing ring is sleeved on the outside of the piston rod, with the sealing ring on the outside of the piston rod located below the pressure relief pipe. The bottom of the piston rod has a sloping structure. A limiting groove is formed on the piston rod, and the two sides of the limiting groove are both sloping structures. A flashlight is fixedly sleeved inside the piston rod. A contact spring is fixedly installed on the upper and lower sides of the flashlight. The two contact springs are elastic steel sheets.

[0008] In at least some embodiments, the power receiving component includes: a power receiving mounting plate, a lower power receiving post, and electrode plates. The power receiving mounting plate is fixedly installed at the bottom of the pressure relief mounting cylinder, and the power receiving mounting plate has two through holes. The lower power receiving post is fixedly installed on the power receiving mounting plate and is inserted into the inner side of a ring of lower power receiving springs. The lower power receiving post is located inside the power receiving cylinder. Electrode plates are fixedly installed at the bottom of the power receiving mounting plate. The two electrode plates are respectively connected to the positive electrode plate and the negative electrode plate of the positive and negative electrode core.

[0009] In at least some embodiments, the power failure device includes: a spring cover and a compression post; the spring cover is threadedly connected to the side of the pressure relief mounting cylinder; the compression post is slidably inserted into the pressure relief mounting cylinder and passes through the side wall of the pressure relief mounting cylinder; the end of the compression post has a beveled structure; the end of the compression post is pressed into a limiting groove; and a ball bearing is embedded in the end of the compression post.

[0010] In at least some embodiments, the power failure device further includes: a safety spring, wherein the safety spring is provided inside the pressure relief mounting cylinder; one end of the safety spring is fixedly connected to the tail of the extrusion column, and the other end of the safety spring is fixedly connected to the inside of the spring cover.

[0011] In at least some embodiments, the copper busbar connector includes: a plastic cover, a copper busbar core, a compression bolt, a connecting post, and an upper electrical terminal. The plastic cover is threaded onto a pressure relief mounting cylinder. The copper busbar core is fixedly mounted on the plastic cover. The compression bolt is threaded onto the copper busbar core. The compression bolt is used to connect the copper busbar. The connecting post is fixedly mounted on the bottom of the copper busbar core, and an upper electrical terminal is fixedly mounted on the bottom of the connecting post. The diameter of the connecting post is smaller than that of the upper electrical terminal. The upper electrical terminal is located inside the electrical terminal cylinder. The upper electrical terminal is inserted into a ring of upper electrical contact springs.

[0012] In at least some embodiments, the copper busbar connector further includes: a pressure relief spring, wherein the pressure relief spring is fixedly installed inside the plastic cover and is located inside the pressure relief mounting cylinder; the bottom end of the pressure relief spring is fixedly connected to the top of the piston column; and the pressure relief spring is in a compressed state.

[0013] In at least some embodiments, the liquid filling component includes a liquid filling pipe and a valve, wherein the liquid filling pipe is fixedly installed on the top cover; and the valve is fixedly installed on the liquid filling pipe.

[0014] This application provides a storage battery for energy storage in a multi-energy complementary power plant, which has the following advantages: This application uses a pressure relief control component in conjunction with the main battery component to automatically control the pressure relief operation when the internal pressure of the main battery component increases and bulges. This structure can achieve automatic pressure relief without an electronic control system, making it more suitable for the frequent charging and discharging conditions of the main battery component used in multi-energy complementary power plant energy storage.

[0015] Furthermore, by using copper busbar connectors in conjunction with pressure relief control components, automatic circuit breaking can be achieved by utilizing the upward-moving piston column when the internal pressure of the battery casing increases. This further reduces safety hazards, and timely circuit breaking can prevent problems such as loose connections between the electrode plates and the positive and negative electrode cores when the battery body bulges, thus avoiding further safety risks. This structure is a mechanical circuit breaking control, which is simple and reliable. Utilizing a power-off fuse, the piston column's lifting and lowering displacement adjustment is not affected. When the piston column moves upward due to pressure increase, it can be automatically squeezed and pushed to move stably upward, ensuring effective power breaking. This avoids the frequent contact and separation of the upper electrode post and electrode spring due to unstable internal pressure of the battery body, which can easily lead to loose connections and sparking.

[0016] In addition, the pressure relief spring can be used to elastically push the piston column, which makes it easier for the piston column to detect leakage in the battery case. If leakage occurs in the battery case, circuit breaking control can also be achieved, which can further reduce safety hazards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings of the embodiments will be briefly described below.

[0018] The accompanying drawings described below are only related to some embodiments of this application and are not intended to limit the scope of this application.

[0019] In the attached diagram: Figure 1 This invention provides a schematic diagram of a series connection of batteries for energy storage in a multi-energy complementary power plant. Figure 2 This invention provides a schematic diagram of the overall structure of a storage battery for multi-energy complementary power plants. Figure 3 This application shows a cross-sectional view of the internal structure of a storage battery for multi-energy complementary power plants. Figure 4 A schematic diagram of the main battery component structure of this application is shown; Figure 5A schematic diagram of the electrical connection structure of this application is shown; Figure 6 A schematic diagram of the pressure relief pipe installation location of this application is shown; Figure 7 A schematic diagram of the pressure relief control component of this application is shown; Figure 8 A schematic diagram of the spring cover mounting position of this application is shown; Figure 9 This application shows Figure 8 Enlarged view of the structure of the G region; Figure 10 A schematic diagram of the copper busbar connector structure of this application is shown.

[0020] List of reference numerals 1. Battery main body components; 101. Battery casing; 102. Top cover; 103. Positive and negative electrode cores; 2. Pressure relief control components; 201. Pressure relief mounting cylinder; 2011. Pressure relief pipe; 202. Piston column; 2021. Limiting groove; 203. Flashlight; 204. Electrical contact spring; 3. Electrical connection components; 301. Electrical connection mounting plate; 3011. Lower electrical contact post; 302. Electrode plate; 4. Power failure fuse components; 401. Spring cover; 402. Extrusion column; 403. Safety spring; 5. Copper busbar connectors; 501. Plastic cover; 502. Copper busbar core; 503. Extrusion bolt; 504. Connecting column; 505. Upper electrical contact post; 506. Pressure relief spring; 6. Fluid filling components; 601. Fluid filling pipe; 602. Valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Example 1: Please refer to Figures 1 to 10 : This application proposes a storage battery for multi-energy complementary power plants, including a battery body 1, on which two pressure relief control components 2 are installed; the two pressure relief control components 2 are used to control circuit breaking; each of the two pressure relief control components 2 has a power connection component 3 installed at its bottom; the two power connection components 3 are used to connect the positive and negative terminals of the battery body 1 respectively; each of the two pressure relief control components 2 has a power failure component 4 installed; each of the two pressure relief control components 2 has a copper busbar connector 5 installed; a electrolyte filling component 6 is fixedly installed on the battery body 1; the battery body 1 includes a battery casing 101 and a top cover 102, with the top cover 102 fixedly installed on the top of the battery casing 101; the battery casing 101 is filled with electrolyte.

[0023] In this embodiment, the battery body 1 further includes: positive and negative electrode cores 103, which are sleeved inside the battery casing 101; the pressure relief control component 2 includes: a pressure relief mounting cylinder 201 and a pressure relief pipe 2011, with a flexible hose connected to the external end of the pressure relief pipe 2011 extending out of the battery pack casing; the pressure relief mounting cylinder 201 is fixedly mounted on the top cover 102; the pressure relief mounting cylinder 201 communicates with the inside of the battery casing 101; the pressure relief pipe 2011 is fixedly mounted on the side of the pressure relief mounting cylinder 201; the pressure relief control component 2 further includes: a piston rod 202, a limiting groove 2021, a flashlight 203, and a flashlight spring 204, which are used for pressure relief mounting cylinders. A piston rod 202 is slidably sleeved inside the cylinder 201, and a sealing ring is sleeved on the outside of the piston rod 202, with the sealing ring on the outside of the piston rod 202 located below the pressure relief pipe 2011; the bottom of the piston rod 202 has a sloping structure; a limiting groove 2021 is provided on the piston rod 202, and the two sides of the limiting groove 2021 are both sloping structures; a flashlight 203 is fixedly sleeved inside the piston rod 202; a ring of electric contact springs 204 is fixedly installed on the upper and lower sides of the flashlight 203; the two rings of electric contact springs 204 are elastic steel sheets; the electric contact component 3 includes: an electric contact mounting plate 301, a lower electric contact post 3011, and an electrode plate 302, and a pressure relief mounting cylinder 201. A power connection mounting plate 301 is fixedly installed at the bottom of the battery. Two through holes are provided on the power connection mounting plate 301. A lower power connection post 3011 is fixedly installed on the power connection mounting plate 301 and is inserted into the inner side of a ring of lower power connection springs 204. The lower power connection post 3011 is located inside the power receiver 203. Electrode plates 302 are fixedly installed at the bottom of the power connection mounting plate 301. The two electrode plates 302 are respectively connected to the positive and negative electrode plates of the positive and negative electrode cores 103. Using a pressure relief control component 2 in conjunction with the battery body component 1, automatic pressure relief can be achieved when the internal pressure of the battery body component 1 increases and bulges, effectively improving... This design enhances safety by eliminating the need for an electronic control system, enabling automatic pressure relief. The piston rod 202 control method is direct and reliable, ensuring basic sealing when the battery's internal pressure is normal, thus preventing leakage. This design is particularly suitable for the frequent charging and discharging conditions of the main battery component 1 in multi-energy complementary power plants, reducing safety hazards caused by the swelling of the main battery component 1. Furthermore, the design is simple to control. When the internal pressure of the main battery component 1 increases, the piston rod 202 moves upward, no longer obstructing the pressure relief pipe 2011, allowing it to release pressure normally and divert any potentially overflowing electrolyte.

[0024] In this embodiment, the power-off safety component 4 includes: a spring cover 401 and a compression post 402. The spring cover 401 is threadedly connected to the side of the pressure relief mounting cylinder 201; the compression post 402 is slidably inserted into the pressure relief mounting cylinder 201, and the compression post 402 passes through the side wall of the pressure relief mounting cylinder 201; the end of the compression post 402 has a beveled structure; the end of the compression post 402 compresses and fits the limiting groove 2021; a ball is embedded in the end of the compression post 402; the power-off safety component 4 also includes: a safety spring 403, the elastic force of the safety spring 403 is greater than the elastic force of the pressure relief spring 506; a safety spring is provided inside the pressure relief mounting cylinder 201. Spring 403; one end of the safety spring 403 is fixedly connected to the tail of the extrusion column 402, and the other end of the safety spring 403 is fixedly connected to the inner side of the spring cover 401; the copper busbar connector 5 includes: a plastic cover 501, a copper busbar core 502, an extrusion bolt 503, a connecting column 504, and an upper electrical connection column 505. The plastic cover 501 is threadedly connected to the pressure relief mounting cylinder 201; the copper busbar core 502 is fixedly installed on the plastic cover 501; the extrusion bolt 503 is threadedly connected to the copper busbar core 502; the extrusion bolt 503 is used to connect the copper busbar; the connecting column 504 is fixedly installed at the bottom of the copper busbar core 502, and connects... A top terminal 505 is fixedly installed at the bottom of the terminal 504; the diameter of the terminal 504 is smaller than that of the top terminal 505; the top terminal 505 is located inside the junction box 203; the top terminal 505 is inserted into the upper ring of junction springs 204; by using copper busbar connector 5 in conjunction with pressure relief control component 2, when the pressure inside the battery casing 101 increases, the upward-moving piston 202 can be used to achieve automatic circuit breaking, which can further reduce safety hazards. Timely circuit breaking can prevent the electrode plates 302 and the positive and negative electrode cores 103 from breaking and becoming loosely connected when the battery body 1 bulges. In case of sparking or other problems, and to avoid further safety hazards, this structure uses mechanical circuit breaking control, which is simple and reliable. Utilizing the power-off fuse 4, while not affecting the adjustment of the piston column 202's lifting and lowering displacement, when the piston column 202 moves upward due to the pressure increase inside the battery casing 101, it can automatically squeeze and push the piston column 202 to move stably upward, ensuring effective power breaking. This avoids the piston column 202 moving up and down due to unstable internal pressure of the battery body 1, which could easily cause frequent contact and separation between the upper electrical terminal 505 and the electrical contact spring 204, leading to loose connections and sparking, thus ensuring the reliability of the circuit breaking control.

[0025] In Example 2, based on Example 1, the copper busbar connector 5 further includes: a pressure relief spring 506, which is fixedly installed inside the plastic cover 501 and located inside the pressure relief mounting cylinder 201; the bottom end of the pressure relief spring 506 is fixedly connected to the top of the piston column 202; the pressure relief spring 506 is in a compressed state; the liquid filling component 6 includes: a liquid filling pipe 601 and a valve 602, which is fixedly installed on the top cover 102; the valve 602 is fixedly installed on the liquid filling pipe 601; the pressure relief spring 506 can be used to elastically push the piston column 202, which can facilitate the piston column 202 to detect leakage in the battery case 101. When leakage occurs in the battery case 101, it can also perform circuit breaking control, which can further reduce safety hazards, improve the comprehensiveness of the detection function of the piston column 202 in this structure, and avoid the problem that the battery performance will be greatly reduced and safety hazards will exist after the battery case 101 leaks.

[0026] The working principle of this embodiment is as follows: When adding electrolyte, it can be added into the battery casing 101 through the filling pipe 601. After appropriate pressurization, the valve 602 is tightened to complete the seal. The pressurization pressure is controlled to keep the piston rod 202 in the pressure relief mounting cylinder 201 at a position that allows it to remain within the pressure relief mounting cylinder 201. Figure 3 The indicated position is sufficient; at this point, the pressure relief spring 506 is compressed. Place the battery main body 1 to be connected in series inside the battery pack housing, and then connect each battery main body 1 in series via copper busbars. After inserting the compression bolt 503 into the copper busbar, manually thread it onto the copper busbar core 502, and then connect the copper busbar to the battery pack terminals. Two-turn contact springs 204 can connect the upper contact post 505 and the lower contact post 3011 to maintain normal power supply. If the battery main body 1 bulges, the internal pressure increases. At this time, the pressure pushes the piston rod 202 upward, and the compression rod 402 will be squeezed back by the limiting groove 2021, further compressing the safety spring 403. At this time, as the piston rod 202 continues to move upward, when the pressure relief spring 403 is released, the pressure relief spring 506 is compressed. When the bottom slope of the piston rod 202 moves to the end of the extrusion rod 402, under the elastic compression of the safety spring 403, the bottom slope of the piston rod 202 can be squeezed, pushing the piston rod 202 to move further upward. At this time, the sealing ring on the outside of the piston rod 202 no longer blocks the pressure relief pipe 2011, and the pressure relief pipe 2011 can normally relieve pressure and prevent explosion. At the same time, under the compression of the extrusion rod 402, the piston rod 202 can maintain the upward state and will drive the upper ring of contact springs 204 to move upward and separate from the upper contact post 505. Because the diameter of the connecting post 504 is smaller than that of the upper contact post 505, the upper ring of contact springs 204 will not contact the connecting post 504, thus realizing circuit breaking control. If the battery casing 101 does not bulge but leaks, the internal pressure of the battery casing 101 decreases. Under the pressure relief spring 506, the piston rod 202 can move downward. At this time, the ball bearing embedded at the end of the compression rod 402 can reduce resistance and does not affect the downward movement of the piston rod 202. The piston rod 202 can then move downward, causing the upper ring of contact springs 204 to move downward and directly separate from the upper contact post 505, thus achieving circuit breaking control.

[0027] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of this application only involve the structures involved in the embodiments of this application; other structures can refer to general designs.

[0028] 2. Where there is no conflict, the embodiments of this application and the features in the embodiments can be combined with each other to obtain new embodiments.

[0029] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A storage battery for energy storage in a multi-energy complementary power plant, comprising a battery body (1), wherein two pressure relief control components (2) are installed on the battery body (1); characterized in that: The two pressure relief control components (2) are used to control the circuit break; the bottom of the two pressure relief control components (2) is respectively equipped with a power connector (3); the two power connectors (3) are respectively used to connect the positive and negative terminals of the battery body component (1); A power-off fuse (4) is installed on each of the two pressure relief control components (2); a copper busbar connector (5) is installed on each of the two pressure relief control components (2); a liquid filling component (6) is fixedly installed on the main body of the battery (1); The main body of the battery (1) includes: a battery case (101) and a top cover (102), the top cover (102) being fixedly installed on the top of the battery case (101); the battery case (101) is filled with electrolyte.

2. The storage battery for multi-energy complementary power plants according to claim 1, characterized in that, The main body of the battery (1) also includes: positive and negative electrode cores (103), and the positive and negative electrode cores (103) are sleeved inside the battery shell (101).

3. A storage battery for multi-energy complementary power plants according to claim 2, characterized in that, The pressure relief control component (2) includes a pressure relief mounting cylinder (201) and a pressure relief pipe (2011). The pressure relief mounting cylinder (201) is fixedly mounted on the top cover (102). The pressure relief mounting cylinder (201) is connected to the inside of the battery case (101). The pressure relief pipe (2011) is fixedly mounted on the side of the pressure relief mounting cylinder (201).

4. A storage battery for multi-energy complementary power plants according to claim 3, characterized in that, The pressure relief control component (2) further includes: a piston rod (202), a limiting groove (2021), a flashlight (203), and a contact spring (204). The piston rod (202) is slidably sleeved on the inner side of the pressure relief mounting cylinder (201), and a sealing ring is sleeved on the outer side of the piston rod (202). The sealing ring on the outer side of the piston rod (202) is located below the pressure relief pipe (2011). The bottom of the piston rod (202) is a sloping structure. A limiting groove (2021) is opened on the piston rod (202), and the two sides of the limiting groove (2021) are sloping structures. The flashlight (203) is fixedly sleeved on the inner side of the piston rod (202). A ring of contact springs (204) is fixedly installed on the upper and lower sides of the flashlight (203). The two rings of contact springs (204) are elastic steel sheets.

5. A storage battery for multi-energy complementary power plants according to claim 4, characterized in that, The power receiving component (3) includes: a power receiving mounting plate (301), a lower power receiving post (3011), and an electrode plate (302). The power receiving mounting plate (301) is fixedly installed at the bottom of the pressure relief mounting cylinder (201), and two through holes are opened on the power receiving mounting plate (301). The lower power receiving post (3011) is fixedly installed on the power receiving mounting plate (301), and the lower power receiving post (3011) is inserted into the inner side of a ring of power receiving springs (204) below. The lower power receiving post (3011) is located inside the power receiving cylinder (203). The electrode plate (302) is fixedly installed at the bottom of the power receiving mounting plate (301). The two electrode plates (302) are respectively connected to the positive electrode plate and the negative electrode plate of the positive and negative electrode core (103).

6. A storage battery for multi-energy complementary power plants according to claim 4, characterized in that, The power failure device (4) includes: a spring cover (401) and a compression post (402). The spring cover (401) is threadedly connected to the side of the pressure relief mounting cylinder (201). The compression post (402) is slidably inserted into the pressure relief mounting cylinder (201) and passes through the side wall of the pressure relief mounting cylinder (201). The end of the compression post (402) is a bevel structure. The end of the compression post (402) is pressed and fits the limiting groove (2021).

7. A storage battery for multi-energy complementary power plants according to claim 6, characterized in that, The power failure device (4) further includes: a safety spring (403), which is provided inside the pressure relief mounting cylinder (201); one end of the safety spring (403) is fixedly connected to the tail of the extrusion column (402), and the other end of the safety spring (403) is fixedly connected to the inside of the spring cover (401).

8. A storage battery for multi-energy complementary power plants according to claim 4, characterized in that, The copper busbar connector (5) includes: a plastic cover (501), a copper busbar core (502), a compression bolt (503), a connecting post (504), and an upper electrical connection post (505). The plastic cover (501) is threaded onto the pressure relief mounting cylinder (201). The copper busbar core (502) is fixedly installed on the plastic cover (501). The compression bolt (503) is threaded onto the copper busbar core (502). The compression bolt (503) is used to connect the copper busbar. The connecting post (504) is fixedly installed at the bottom of the copper busbar core (502), and the upper electrical connection post (505) is fixedly installed at the bottom of the connecting post (504). The diameter of the connecting post (504) is smaller than that of the upper electrical connection post (505). The upper electrical connection post (505) is located inside the electrical connection cylinder (203). The upper electrical connection post (505) is inserted into a ring of electrical contact springs (204) above.

9. A storage battery for multi-energy complementary power plant energy storage according to claim 8, characterized in that, The copper busbar connector (5) further includes a pressure relief spring (506), which is fixedly installed inside the plastic cover (501) and is located inside the pressure relief mounting cylinder (201); the bottom end of the pressure relief spring (506) is fixedly connected to the top of the piston column (202); the pressure relief spring (506) is in a compressed state.

10. A storage battery for multi-energy complementary power plants according to claim 1, characterized in that, The liquid filling component (6) includes a liquid filling pipe (601) and a valve (602). The liquid filling pipe (601) is fixedly installed on the top cover (102). The valve (602) is fixedly installed on the liquid filling pipe (601).

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