High-safety lithium ion battery energy storage product based on new energy

Abstract

The application discloses a kind of high safety lithium ion battery energy storage products based on new energy, including heat dissipation shell assembly, the heat dissipation shell assembly includes heat dissipation shell, pressure relief assembly;Heat dissipation shell top surface is equipped with first water storage wall, second water storage wall, third water storage wall, first water storage wall, second water storage wall, third water storage wall enclose three water storage areas, from inside to outside in turn first water storage area, second water storage area and third water storage area.The technical effects and advantages of the present application are:1.the product inside will not enter dust, protect the inside parts, especially electronic components, thereby prolonging product life.2.product appears heating abnormal condition, will issue warning and prompt processing according to different situations, even if thermal runaway fire, the system can automatically extinguish fire, reduce the surrounding articles ignition caused by the product thermal runaway, reduce loss, reduce casualties.3.in working condition, without using high-power air conditioning system, reduce operating cost.

Description

TECHNICAL FIELD

[0001] The application relates to the field of new energy storage, in particular to a high-safety lithium ion battery energy storage product based on new energy. BACKGROUND

[0002] Electric energy has an important influence on national industry and people's life, and energy security is one of the problems that need to be considered in formulating some policies of a country.

[0003] With the rapid development of new energy power generation, electric vehicles and smart grid technology, lithium ion batteries have become the core carrier in the field of electrochemical energy storage due to their high energy density, long cycle life and other advantages. However, the existing lithium battery energy storage system still has significant technical bottlenecks in safety: first, the traditional battery module structure design lacks effective blocking mechanism for thermal runaway propagation, and the thermal runaway of single battery can easily trigger chain reaction, leading to system-level safety accidents; second, the flammable nature of the existing electrolyte system and the insufficient thermal stability of the electrode material pose a risk of fire and explosion under overcharge, short circuit or mechanical abuse conditions; in addition, the battery management system (BMS) has insufficient prediction accuracy for early faults, and it is difficult to implement effective intervention before the critical point of thermal runaway. Although the industry has improved safety through means such as strengthening thermal management and optimizing separator coating, it still faces the contradiction between protection measures and energy density, and the safety redundancy design under complex working conditions significantly increases the system cost. For lithium battery energy storage products that store a large amount of energy, when thermal runaway and fire occur, the common fire extinguisher has limited effect, and if fire extinguishing water is used, it needs to be operated by personnel with professional knowledge. At the same time, such energy storage products often have high voltage, and there is a risk of electric shock for firefighters in the waterlogged state.

[0004] At present, some lithium ion battery energy storage products use air cooling technology to remove heat generated by the battery cells and internal inverter components. The fan blows external air through the surface of the heat generating components and then expels it outside the product, taking the heat away. When external air enters the product, it carries dust into the product. After a long period of dust accumulation, the product's normal operation is affected. If there is dust-proof cotton at the air inlet, it reduces the amount of dust entering the product, but also reduces the amount of air entering, affecting the cooling effect, and dust still cannot be completely isolated from entering the product. If an air conditioning system is used, the product housing is made into a sealed structure, and the air conditioning system is used to create an internal circulation in the energy storage product. The outdoor unit of the air conditioning system is placed outside the energy storage product. This method can solve the problems of heat dissipation and sealing, but it also has significant disadvantages. First, the cost of the entire air conditioning system is high, increasing the cost of the product. Second, the air conditioning system needs a large amount of power to maintain its operation while it is working, which consumes a lot of electricity and increases the cost of use.

[0005] Therefore, it is necessary to develop a lithium ion battery energy storage product that has high safety and economy, which is a key requirement for breaking through the barriers to industrial scale application. SUMMARY

[0006] The application discloses a high-safety lithium ion battery energy storage product based on new energy, which can solve the problem of heat dissipation of the lithium ion battery energy storage product and prevent dust in the air outside the product from entering the product and affecting the performance of the product.

[0007] The technical scheme of the application is as follows:

[0008] The application discloses a high-safety lithium ion battery energy storage product based on new energy, which can solve the problem of heat dissipation of the lithium ion battery energy storage product and prevent dust in the air outside the product from entering the product and affecting the performance of the product.

[0009] The pressure relief assembly 1b comprises a water plugging cover 1ba, a waterproof ring 1bb, a fixed clamping block 1bc, a water collecting funnel 1bd, a spring 1be, a reverse threaded bolt 1bf, a water guide pipe 1bg, a small water storage box 1bh and a fixed buckle 1bj. The water plugging cover 1ba is a circular sheet with a circular table 1baa in the middle. The circular table 1baa has an internal thread blind hole 1bab in the middle. The internal thread is connected with the reverse threaded bolt with a reverse thread 1bfa. The fixed clamping block 1bc has a circular counterbore 1bca in the center. The counterbore 1bca is circular and flat. The counterbore 1bca has a plurality of special-shaped holes 1bcb outside. The fixed clamping block 1bc has a fixed clamping block upper small wall 1bcc and a fixed clamping block lower small wall 1bcd outside. The two small walls clamp the fixed clamping block in the center hole of the upper wall to prevent the fixed clamping block from moving up and down. The upper wall of the heat dissipation shell has a groove 1aw near the center hole. The waterproof ring 1bb is placed in the groove and is pressed by the water plugging cover. The fixed clamping block has a spring 1be below. One end of the spring 1be abuts against the inner side flat surface 1bfb of the reverse threaded bolt. The other end of the spring 1be abuts against the inner side flat surface of the upper wall of the heat dissipation shell. The reverse threaded bolt has a water collecting funnel 1bd below. The water collecting funnel 1bd is connected to the water guide pipe. The water guide pipe is inclined downward from the water collecting funnel to the small water storage box 1bh. The water guide pipe is fixed to the inner top surface of the heat dissipation shell by the fixed buckle. The other end of the water guide pipe is connected to the small water storage box 1bh. The small water storage box 1bh has a water storage area. The water storage area has exhaust holes 1bha on the left and right sides. The small water storage box 1bh is fixed to the front small hole 1at of the front side of the heat dissipation shell. The small water storage box 1bh has a positive electrode and a negative electrode for connecting an alarm at a certain height inside the small water storage box 1bh.

[0010] Further, the second drainage hole has a spray-proof stop block 1aq outside. The spray-proof stop block 1aq is hollow and has a downward opening 1ar. The second drainage hole is connected to the spray-proof stop block 1aq. When the water in the second drainage hole 1ap is drained from the groove 1am, the water pressure is large, and the water will spray to the spray-proof stop block 1aq and bounce back to flow downward along the side wall.

[0011] The heat dissipation shell assembly 1 has a large door 1c and a small door 1d in front. The large door 1c is installed in the door hole 1as and can be opened and closed. The front side of the heat dissipation shell has a front small hole 1at. The door hole 1as has a convex structure on the left and right sides. The convex structure 1au on the left side has a groove. The inner wall of the groove has a plurality of first small holes 1ay. The groove structure has a water absorption bag 7 and an oxygen consumption bag 8 inside. The water absorption bag contains calcium oxide material. When there is water vapor in the energy storage product, the water absorption bag will absorb it to prevent the water vapor from affecting the performance of the energy storage product. The oxygen consumption bag contains iron powder and sodium chloride to absorb oxygen in the energy storage product. Even if the lithium ion battery module has thermal runaway, the amount of fire and heat generated will be much less than in ordinary air, which is beneficial to improve the safety of the product. The convex structure outside has a small door 1d. When the small door 1d is closed, water vapor cannot enter the product from the outside.

[0012] Also including the heat insulation shell 2, the air control plate 3, the fan 9, the fan fixing frame 10, the lithium ion battery module 11, the module fixing frame 12, the air guide block 13; The heat dissipation shell assembly has the module fixing frame 12 inside, and a plurality of lithium ion battery modules 11, a battery management system module, an inverter and a fan fixing frame are fixed to the module fixing frame, and the fan is fixed to the fan fixing frame; The heat insulation shell 2 has a left wall, a right wall, a rear wall 2a and an upper wall, wherein the rear wall 2a is provided with a plurality of ventilation holes, the heat insulation shell is arranged between the module fixing frame and the heat dissipation shell assembly; The air control plate 3 is rectangular in shape, is in the form of a sheet, has a plurality of ventilation holes, is arranged between the heat insulation shell and the heat dissipation shell assembly, has three pieces, one piece is located at the upper surface of the heat insulation shell, is parallel to the intersection line between the rear side of the heat insulation shell and the upper surface of the heat insulation shell, and is 10 mm away from the intersection line, another piece is located at the left side of the heat insulation shell, is parallel to the intersection line between the rear side of the heat insulation shell and the left side of the heat insulation shell, and is 10 mm away from the intersection line, and the third piece is located at the right side of the heat insulation shell, is parallel to the intersection line between the rear side of the heat insulation shell and the right side of the heat insulation shell, and is 10 mm away from the intersection line; Each of the air control plates has a plurality of ventilation holes, the diameters of the ventilation holes are the same, and the center distances between the holes are not all the same, so as to reasonably distribute the air volume flowing through the upper wall, the left wall and the right wall of the heat insulation shell after the gas comes out of the rear wall of the heat insulation shell; when the gas needs to be cooled, more flowing gas contacts more heat dissipation shell inner sides, which is beneficial to heat dissipation.

[0013] Also including the bottom plate 14, the bottom plate 14 is located at the bottom of the product and has a recess structure, i.e. a water pool 14a; A small groove 14b is formed at the position of the bottom plate 14 between the inside of the heat dissipation assembly and the heat insulation shell, the groove bottom has an inclination angle, is located at the lowest part of the inside of the door, and two electrode pieces are arranged in the area, one of which is a positive electrode 14c and the other is a negative electrode 14d; when the two electrode pieces are soaked in water, the positive electrode and the negative electrode are conductive, form a current, and flow through the alarm bell to emit an alarm sound, and at the same time, the alarm information is transmitted to the mobile phone, and the mobile phone receives the alarm information.

[0014] Also including the water delivery pipe 4, the water pump 5 and the faucet assembly 6, the faucet assembly 6 is located outside the heat dissipation assembly and includes a floating ball 6a, a valve body part 6b, a handle 6c and a water outlet pipe 6d, the floating ball 6a is in the form of a hollow sphere and can float on the water surface, the valve body part 6b has a semispherical structure, the principle of which is similar to that of a ball valve, and the semispherical structure can rotate around the shaft, the semispherical structure is embedded in the water outlet pipe 6d of tap water, and the rotation can control whether the water outlet pipe discharges water and the water discharge amount, the floating ball 6a floats on the water in the water pool and is connected with the valve body part 6b through the handle 6c, the water level can be controlled according to the rotation angle of the valve body part 6b, and the water flow rate of the faucet can be controlled; The water pump 5 is located outside the heat dissipation shell assembly, is connected with two water pipes, one end of one water pipe extends into the water pool formed by the bottom plate, and the other water pipe delivers water to the upper wall first water storage area through the pressure of the water pump.

[0015] The left side, the right side and the back side of the heat dissipation shell 1a are fixed with multiple water guide pieces 1av, which are divided into multiple layers in the height direction, each layer has multiple water guide pieces, and each water guide piece has multiple second small holes 1ava at the bottom and a small water blocking wall 1avb at the outer side. These structures are beneficial for water to contact the surface of the heat dissipation shell more during the flow process, and carry away more heat. At the same time, when the water flows to the water guide piece, it often splashes and splashes, realizes the contact between water and more air, is beneficial for heat dissipation, and prevents the water from flowing to a place far away from the heat dissipation shell under the blocking of the long water blocking piece.

[0016] Technical effects and advantages of the present application:

[0017] 1. Dust cannot enter the product, protecting the internal components, especially electronic components, thereby prolonging the product life.

[0018] 2. If the product overheats, an alarm will be sent and a prompt will be given to handle the situation. Even if a thermal runaway fire occurs, the system can automatically extinguish the fire, reducing the risk of surrounding objects catching fire due to the product's thermal runaway, reducing losses and personnel casualties.

[0019] 3. In the working state, there is no need to use a high-power air conditioning system, reducing operating costs. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is an exploded view of the present application;

[0022] Figure 3 It is a rear view of the heat dissipation shell assembly;

[0023] Figure 4 It is Figure 3 Another perspective view;

[0024] Figure 5 It is an exploded view of the heat dissipation shell;

[0025] Figure 6 It is a schematic diagram of the heat dissipation shell structure;

[0026] Figure 7 It is Figure 6 An enlarged view of position A;

[0027] Figure 8 It is an inside view of the heat dissipation shell;

[0028] Figure 9 It is a pressure relief assembly schematic diagram;

[0029] Figure 10 It is an exploded view of the pressure relief assembly;

[0030] Figure 11 Fig. 1 is a schematic view of a water blocking cover structure;

[0031] Figure 12 Fig. 2 is a schematic view of a fixed clamping block 1bc;

[0032] Figure 13 Fig. 3 is a schematic view of a bolt with reverse thread;

[0033] Figure 14 Fig. 4 is a schematic view of a small water storage box;

[0034] Figure 15 Fig. 5 is a schematic view of a rear wall of a heat insulation shell;

[0035] Figure 16 Fig. 6 is a schematic view of a bottom plate structure;

[0036] Figure 17 Fig. 7 is a schematic view of a faucet assembly;

[0037] Figure 18 Fig. 8 is a schematic view of a hemispherical structure of a valve body part. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0039] The embodiment is a high-safety lithium ion battery energy storage product based on new energy, comprising a heat dissipation shell assembly 1, which comprises a heat dissipation shell 1a and a pressure relief assembly 1b; the top surface of the heat dissipation shell 1a is provided with a first water storage wall 1ad, a second water storage wall 1ag and a third water storage wall 1ak; the first water storage wall 1ad, the second water storage wall 1ag and the third water storage wall 1ak surround three water storage areas, which are a first water storage area 1aa, a second water storage area 1ab and a third water storage area 1ac from inside to outside; the first water storage area is surrounded by the first water storage wall 1ad, and when the first water storage area is full, water can flow to the second water storage area through the top of the first water storage wall; a center hole 1ae is arranged in the middle of the first water storage area, and a water diversion ring 1af is arranged at the bottom of the center hole 1ae; the water diversion ring 1af is in a ring-shaped downward protruding structure; the second water storage area is located between the first water storage wall and the second water storage wall 1ag and is surrounded by the second water storage wall 1ag; a plurality of first drainage holes 1ah are arranged on the side surface of the second water storage wall 1ag, and the first drainage holes are arranged in two rows in the height direction, each row has a plurality of first drainage holes, and a plurality of notches 1aj are arranged on the top of the second water storage wall 1ag; the second water storage wall 1ag and the third water storage wall 1ak form the third water storage area 1ac, which is surrounded by the third water storage wall 1ak; a groove 1am is arranged on the inner side of the bottom of the third water storage wall, and when the third water storage area has a small amount of water, the groove can be filled with water; the top of the left side wall, the right side wall and the back side wall of the third water storage wall is provided with a plurality of notches 1an, and the lower part is provided with a plurality of second drainage holes 1ap; the second drainage holes are arranged in two rows in the height direction, each row has a plurality of second drainage holes, and when the groove is filled with water, the two rows of second drainage holes can overflow water outward;

[0040] The pressure relief assembly 1b includes a water-blocking cover 1ba, a waterproof ring 1bb, a fixing block 1bc, a water collection funnel 1bd, a spring 1be, a bolt with a backing 1bf, a water inlet pipe 1bg, a small water storage box 1bh, and a fixing buckle 1bj. The water-blocking cover 1ba is a thin circular sheet with a frustum 1baa in the center of its inner side. The frustum has a blind hole 1bab with an internal thread in the center, which is connected to the bolt with a backing. The fixing block 1bc has a circular countersunk hole 1bca in the center, which is flat and round. The bolt with a backing 1bf passes through the countersunk hole. There are multiple irregular holes 1bcb outside the countersunk hole. There are upper small walls 1bcc and lower small walls 1bcd on the outer side of the fixing block. These two small walls clamp the fixing block into the center hole of the upper wall to prevent the fixing block from moving up and down. There is a groove 1aw near the center hole on the upper wall of the heat sink housing. A waterproof ring 1bb is placed in the groove and is pressed down by a water-blocking cap. There is a spring 1be under the fixing block. One end of the spring abuts against the inner plane 1bfb with the buckle, and the other end abuts against the inner plane of the upper wall of the heat sink housing. There is a water collection funnel 1bd below the buckle. The bottom hole of the water collection funnel is connected to the water inlet pipe. The water inlet pipe runs from the water collection funnel to the small water storage box and slopes downward. The water inlet pipe is fixed to the inner top surface of the heat sink housing by a fixing buckle. The other end is connected to the small water storage box 1bh. The small water storage box has a water storage area. There are vent holes 1bha on the left and right sides of the water storage area. The small water storage box is fixed to the front small hole 1at on the front side of the heat sink housing. There are positive and negative terminals for connecting the alarm at a certain height inside the small water storage box.

[0041] There is a blowout preventer 1aq on the outside of the second drain hole. The blowout preventer is hollow and has a downward opening 1ar. The outside of the second drain hole is connected to the blowout preventer. When the water in the second drain hole 1ap is drained out of the trench 1am, if the water pressure is high, it will spray onto the blowout preventer and bounce back, flowing down along the side wall.

[0042] The heat dissipation housing assembly 1 has a large door 1c and a small door 1d on the front. The large door 1c is installed at the door opening 1as and can be opened and closed. The front side of the heat dissipation housing has a small hole 1at. There are convex structures on the left and right sides of the door opening 1as. The convex structure 1au on the left side has a groove with multiple first small holes 1ay on the inner wall of the groove. A water-absorbing bag 7 and an oxygen-consuming bag 8 are placed inside the groove. The water-absorbing bag contains calcium oxide. When there is water vapor inside the energy storage product, the water-absorbing bag will absorb it to prevent water vapor from affecting the performance of the energy storage product. The oxygen-consuming bag contains iron powder and sodium chloride to absorb oxygen inside the energy storage product. This means that even if thermal runaway occurs in a low-oxygen environment, the lithium-ion battery module will generate much less open flame and heat than in ordinary air, which is beneficial to improving product safety. A small door 1d is installed on the outside of the convex structure. When the small door is closed, water vapor will not be able to enter the product from the outside.

[0043] It also includes a heat insulation shell 2, an air control plate 3, a fan 9, a fan mounting bracket 10, a lithium-ion battery module 11, a module mounting bracket 12, and an air guide block 13; the heat dissipation shell assembly has a module mounting bracket 12 inside, and multiple lithium-ion battery modules 11, a battery management system module 15, an inverter 16, and a fan mounting bracket are fixed to the module mounting bracket, and the fan is fixed to the fan mounting bracket; the heat insulation shell 2 has a left wall, a right wall, a rear wall 2a, and a top wall, wherein the rear wall 2a has multiple ventilation holes 2aa, and the heat insulation shell is arranged between the module mounting bracket and the heat dissipation shell assembly; the air control plate 3 is rectangular in shape, thin in shape, and has multiple ventilation holes, arranged between the heat insulation shell and the heat dissipation shell assembly, there are three pieces, one of which is located on the upper surface of the heat insulation shell and is connected to the heat insulation shell. The rear side of the heat-insulating shell is parallel to the line of intersection with the upper surface of the heat-insulating shell, and 10mm away from the line of intersection. Another plate is located on the left side of the heat-insulating shell, and is parallel to the line of intersection with the rear side of the heat-insulating shell and the left side of the heat-insulating shell, and 10mm away from the line of intersection. The third plate is located on the right side of the heat-insulating shell, and is parallel to the line of intersection with the rear side of the heat-insulating shell and the right side of the heat-insulating shell, and 10mm away from the line of intersection. Each of these air control plates has multiple ventilation holes. The ventilation holes have the same diameter, but the center distance between the holes is not the same. This is to control the airflow after the gas comes out from the rear wall of the heat-insulating shell and to reasonably distribute the airflow through the upper wall, left wall and right wall of the heat-insulating shell. When the gas needs to dissipate heat, more flowing gas comes into contact with more inner surfaces of the heat-insulating shell, which is beneficial to heat dissipation.

[0044] It also includes a base plate 14, which has a recessed structure, namely a water tank 14a, at the bottom of the product. A small groove 14b is provided on the base plate 14 between the heat dissipation component and the heat insulation shell. The bottom of the groove has an inclined angle and is located at the lowest point on the bottom inside the door. There are two electrode plates in this area, one of which is a positive electrode 14c and the other is a negative electrode 14d. When water soaks the two electrode plates, the positive and negative electrodes are connected to form a current, which flows through the alarm bell to emit an alarm sound. At the same time, the alarm information is transmitted to the mobile phone, and the mobile phone receives the alarm information.

[0045] It also includes a water supply pipe 4, a water pump 5, and a faucet assembly 6. The faucet assembly 6 is located outside the heat dissipation assembly and includes a float ball 6a, a valve body part 6b, a handle 6c, and a water outlet pipe 6d. The float ball 6a is a hollow spherical structure that can float on the water surface. The valve body part 6b has a hemispherical structure 6ba, which works similarly to a ball valve and can rotate around an axis. This hemispherical structure is embedded in the water outlet pipe 6d of the tap water. By rotating it, the water outlet pipe can be controlled to produce water and the amount of water. The float ball 6a floats on the water in the pool and is connected to the valve body part 6b through the handle 6c. According to the water level, the faucet can be controlled to be turned on or off and the water flow rate can be controlled by controlling the rotation angle of the valve body part 6b. The water pump 5 is located outside the heat dissipation housing assembly and is connected to two water pipes. One end of the water pipe extends into the pool formed by the bottom plate, and the other water pipe, through the pressure of the water pump, transports water to the first-level water storage area on the upper wall.

[0046] Multiple water guide plates 1av are fixed on the left, right, and rear sides of the heat dissipation shell 1a. These water guide plates are divided into multiple layers in the height direction, with multiple plates in each layer. Each water guide plate has multiple second small holes 1ava at its bottom and small water-blocking walls 1avb on its outer side. Long water-blocking plates 1ax are present at the intersection of the front, rear, left, and right sides of the heat dissipation shell 1a. These structures facilitate water to have more contact with the surface of the heat dissipation shell during the flow process, thus carrying away more heat. When the water flows to the water guide plates, it often tumbles and splashes, allowing the water to have more contact with the air, which is beneficial for heat dissipation. At the same time, the long water-blocking plates 1ax can prevent water from splashing away from the heat dissipation shell and hitting people.

[0047] In this embodiment, when the lithium-ion battery module 11 and inverter in the energy storage product generate heat and need to dissipate it, water from the faucet flows into the pool formed by the recessed structure of the bottom plate 14. The water pump draws the water from the pool into the primary water storage area of ​​the heat dissipation shell. After the primary water storage area is full, the water flows from the top of the water storage wall of the primary water storage area to the secondary water storage area. The side of the water storage wall of the secondary water storage area has multiple first drainage holes, which are arranged in two rows in the height direction, with multiple first drainage holes in each row. When the water in the secondary water storage area overflows the lowest row of first drainage holes, the water in the secondary water storage area will flow from this row of holes to the tertiary water storage area. Because this row of first drainage holes is relatively small, the drainage capacity is not large. The water level is high, so it quickly rises to the higher row of first drain holes. The top of the secondary water storage wall has multiple gaps. After the water in the secondary water storage area overflows these two rows of first drain holes, it will continue to rise to these gaps, from which the water flows to the tertiary water storage area. Therefore, even if the upper wall of the heat dissipation shell is slightly tilted relative to the horizontal plane during installation, it can still ensure that water drains from each first drain hole, allowing water to flow over most of the surface of the tertiary water storage area. The flowing water carries away the heat from the upper wall of the heat dissipation shell. At the same time, even when the secondary water storage area is not full, it can still achieve a good heat dissipation effect. The size of the secondary water storage area and the height of the secondary water storage wall can be adjusted according to specific test data to achieve optimal performance. The current heat dissipation effect and water storage capacity are adjusted to the optimal state. Compared with filling the entire secondary water storage area with water, the weight of the water in the secondary water storage area is also reduced. After the water enters the tertiary water storage area, it will flow to the grooves on the inner side of the bottom of the tertiary water storage wall. The grooves have a small water storage capacity. In the tertiary water storage wall, there are multiple gaps at the top of the left, right, and rear side walls, and multiple secondary drainage holes at the bottom. These secondary drainage holes are arranged in two rows in the vertical direction, with multiple secondary drainage holes in each row. The height of these secondary drainage holes is no higher than the height of the large plane of the tertiary water storage area. When the grooves are full of water, both rows of secondary drainage holes can spray water outward, thus achieving the goal of heat dissipation even when the upper wall of the heat dissipation shell is slightly different from the horizontal plane. When the flow is tilted, as long as a small amount of water enters the three-stage water storage area, the trench can be filled with water. The second drainage hole at the bottom of the three-stage water storage wall next to the trench can drain water outwards. This means that the three-stage water storage area does not necessarily need to store a lot of water, reducing the weight of water stored on the upper wall of the heat dissipation shell and reducing the design difficulty and cost of the heat dissipation shell. There is a blowout baffle on the outside of the second drainage hole. The blowout baffle has a downward opening. When water is drained outwards from the trench from the second drainage hole, if the water force is strong, it will spray onto the blowout baffle and bounce back, flowing down along the side wall. There is a door hole at the front of the heat dissipation shell. The large door is installed on the outside of the door hole and can be opened or closed. Above the door hole, there is a small front hole on the front side of the heat dissipation shell.The large hole has convex structures on both sides. Inside the left convex structure is a groove with multiple small holes on its inner wall. The water-absorbing bag and oxygen-consuming bag are placed inside this groove. The water-absorbing bag contains calcium oxide; when water vapor is present inside the energy storage product, the bag absorbs it, preventing it from affecting the product's performance. The oxygen-consuming bag contains iron powder and sodium chloride; its main purpose is to absorb oxygen from the energy storage product. This ensures that even if thermal runaway occurs in a low-oxygen environment, the lithium-ion battery module will generate significantly less open flame and heat compared to normal air, thus improving performance. For enhanced product safety, a small door (1d) is installed on the outer side of the bulge. Closing this door prevents water vapor from entering the product from the outside. The pressure relief assembly includes a water-blocking cap, a waterproof ring, a fixing block, a water collection funnel, a spring, a bolt with an undercut, a water inlet pipe, a small water storage box, and a fixing buckle. The water-blocking cap is a thin, circular sheet with a truncated cone in the center. The cone has a blind hole with an internal thread, which connects to the bolt with the undercut. The fixing block is flat and round with a central countersunk hole. A countersunk platform is located next to the through hole, through which the bolt with the undercut passes. Multiple irregularly shaped holes are located outside this through hole. The upper and lower small walls of the fixing block secure it in place, preventing it from moving up and down. Near the center hole of the upper wall of the heat sink housing, there is a groove where a waterproof ring is placed and held in place by a water-blocking cap. Below the fixing block is a spring; one end of the spring abuts against the inner bolt plane of the undercut bolt, and the other end abuts against the inner plane of the upper wall of the heat sink housing. Below the undercut bolt is a water collection funnel, the bottom hole of which connects to a water inlet pipe. The water inlet pipe forms a downward angle with the horizontal line and is secured with a fixing buckle. One end connects to a small water storage box, which is fixed to a small hole on the front side of the heat dissipation housing. When the energy storage product is working, the lithium-ion battery module, battery management system (BMS) module, and inverter will generate heat. The air inside the heat dissipation housing will expand, increasing the pressure. The gas inside the product will be discharged outside the product through the water collection funnel, water inlet pipe, and small water storage box of the pressure relief component. When the product is not working, the air inside the product will cool down, reducing the air pressure. Air from outside the product will enter the product through the small water storage box, water inlet pipe, and water collection funnel, thus balancing the internal and external air pressure of the product.

[0048] The implementation examples are divided into the following cases based on the extent of water ingress into the water-blocking cap:

[0049] 1. When a small amount of air pressure increases inside the product for a short time, the spring is in a compressed state and has a spring preload, so the water-blocking cover does not open, and the gas is discharged outside the product through the water collection funnel, water inlet pipe and small water storage box.

[0050] 2. When there is a short period of high air pressure inside the product, or the pressure relief component fails, it will slightly open the water-blocking cap. A small amount of water will enter the product through the central hole on the upper wall of the heat sink housing. Some of the water will directly enter the water collection funnel of the pressure relief component, while the other part will flow on the inner side of the upper wall of the heat sink housing. When it flows to the water guide ring, the water guide ring will guide the water to drip down and fall into the water collection funnel of the pressure relief component. This ensures that any small amount of water entering will flow into the water collection funnel and then through the water pipe to the small water storage box. The small water storage box has a water storage area with two electrode plates, one of which is positive and the other is negative. When water soaks the two electrode plates, the positive and negative electrodes conduct, and current flows through the alarm bell to emit an alarm sound. At the same time, it connects to the mobile phone, which can receive the alarm information and handle it in time. If the pressure relief component fails, it needs to be maintained in time. In this case, it is highly likely that it can be repaired and used normally.

[0051] 3. When the product experiences a short period of high internal pressure, briefly opening the water-blocking cap, but the undercut bolts are not fully tightened to the fixing block, a significant amount of water enters the product through the central hole on the upper wall of the heat dissipation housing. Some of the water enters the water collection funnel of the pressure relief component and flows into the small water storage box, triggering an alarm. Simultaneously, the water collection funnel of the pressure relief component cannot hold all the water, causing it to overflow and flow along the outside of the heat insulation housing, into the small groove on the bottom plate, and along the inclined direction of the small groove, flow to the inside of the door, triggering an alarm. This creates a double alarm, indicating a serious problem that requires immediate attention. This situation necessitates careful inspection to identify the root cause; repairing it may restore normal operation.

[0052] 4. When a large amount of heat is generated within the energy storage product in a very short time, the gas will rapidly and forcefully push the water-blocking cap. The water-blocking cap will move upwards, causing the bolts with buckles to engage with the recessed platform of the fixing block, thus opening the water-blocking cap. This situation generally indicates that the lithium-ion battery has experienced thermal runaway and will soon catch fire. Water will continuously flow into the heat dissipation shell through the central hole on the upper wall. At this time, the amount of water flowing from the upper wall to the bottom water tank will decrease, causing the water level in the tank to drop. The floating parts on the valve body will also drop, thus opening the tap or opening the tap valve more fully to replenish the water tank, providing a continuous supply of water to flow into the energy storage product and extinguish the fire. The entire process is timely and rapid, requiring no personnel intervention, reducing the risk of fires in nearby items due to thermal runaway of the product, reducing property damage, and reducing the possibility of injury or death to firefighters and ordinary personnel.

[0053] Under normal operating conditions, the heat generated by the lithium-ion battery modules and inverters on the module mounting bracket inside the product is driven by a fan fixed to the fan mounting bracket. The fan drives the gas to flow over the surfaces of the heat-generating components such as the battery pack and inverter, and then flows through the holes on the rear side of the heat insulation shell to the space between the heat insulation shell and the heat dissipation shell. There are multiple air guide blocks between the heat insulation shell and the heat dissipation shell, which guide the gas to contact the inner side of the heat dissipation shell as much as possible, so that the heat of the gas can be transferred to the heat dissipation shell and flow back to the fan. The water flowing on the outer side of the heat dissipation shell carries away the heat of the heat dissipation shell. The water evaporates and cools down during the flow, thereby achieving continuous cooling of the energy storage product.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-safety lithium-ion battery energy storage product based on new energy sources, characterized in that, The heat dissipation housing assembly (1) includes a heat dissipation housing (1a) and a pressure relief assembly (1b). The top surface of the heat dissipation housing (1a) is provided with a primary water storage wall (1ad), a secondary water storage wall (1ag), and a tertiary water storage wall (1ak). The primary water storage wall (1ad), the secondary water storage wall (1ag), and the tertiary water storage wall (1ak) surround and form three water storage zones, which are, from the inside out, the primary water storage zone (1aa), the secondary water storage zone (1ab), and the tertiary water storage zone (1ac). The primary water storage zone is surrounded by the primary water storage wall (1ad). When the primary water storage zone is full, it can flow through the top of the primary water storage wall to the secondary water storage zone. A central hole (1ae) is opened in the middle of the primary water storage zone, and a water guide ring (1af) is present at the bottom of the central hole (1ae). The secondary water storage zone is located between the primary water storage wall and the secondary water storage wall. Between the two walls (1ag), there is a secondary water storage wall (1ag). The secondary water storage wall (1ag) has multiple first drainage holes (1ah) on its side. These first drainage holes are arranged in two rows in the height direction, with multiple first drainage holes in each row. The top of the secondary water storage wall (1ag) has multiple gaps (1aj). Between the secondary water storage wall (1ag) and the tertiary water storage wall (1ak) is the tertiary water storage area (1ac). The tertiary water storage area is surrounded by the tertiary water storage wall (1ak). The bottom inner side of the tertiary water storage wall has a ditch (1am). The top of the left, right and rear side walls of the tertiary water storage wall has multiple gaps (1an), and the lower part has multiple second drainage holes (1ap). These second drainage holes are arranged in two rows in the height direction, with multiple second drainage holes in each row. When the ditch is full of water, water can overflow from both rows of second drainage holes. The pressure relief assembly (1b) includes a water-blocking cap (1ba), a waterproof ring (1bb), a fixing block (1bc), a water collection funnel (1bd), a spring (1be), a barbed bolt (1bf), a water inlet pipe (1bg), a small water storage box (1bh), and a fixing buckle (1bj). The water-blocking cap is connected to the barbed bolt. The fixing block (1bc) has a circular countersunk hole (1bca) in the center, and a groove (1aw) near the center hole on the upper wall of the heat sink housing. A spring (1be) is located below the fixing block, with one end of the spring abutting against the inner plane of the barbed bolt. 1bfb), the other end abuts against the inner side of the upper wall of the heat dissipation housing, with a water collection funnel (1bd) below the buckle bolt, the bottom hole of the water collection funnel is connected to the water inlet pipe, the water inlet pipe runs from the water collection funnel to the small water storage box, and slopes downwards, the water inlet pipe is fixed to the inner top surface of the heat dissipation housing by a fixing buckle, the other end is connected to the small water storage box (1bh), the small water storage box has a water storage area, and there are vent holes (1bha) on the left and right sides of the water storage area. The small water storage box is fixed to the front small hole (1at) on the front side of the heat dissipation housing, and there are positive and negative terminals for connecting the alarm at a certain height inside the small water storage box.

2. The high-safety lithium-ion battery energy storage product based on new energy sources according to claim 1, characterized in that: The countersunk hole (1bca) has multiple irregular holes (1bcb) on its outside. There are upper small walls (1bcc) and lower small walls (1bcd) on the outside of the fixing block. These two small walls clamp the fixing block in the center hole of the upper wall to prevent the fixing block from moving up and down. There is a groove (1aw) near the center hole of the upper wall of the heat dissipation shell. The waterproof ring (1bb) is placed in the groove and is pressed down by the water-blocking cover.

3. The high-safety lithium-ion battery energy storage product based on new energy sources according to claim 1, characterized in that: There is a blowout preventer (1aq) on the outside of the second drain hole. The blowout preventer is hollow and has a downward opening (1ar). The outside of the second drain hole is connected to the blowout preventer. When the water in the second drain hole (1ap) is drained out of the trench (1am) and the water pressure is high, it will spray onto the blowout preventer and bounce back, flowing down along the side wall.

4. The high-safety lithium-ion battery energy storage product based on new energy sources according to claim 1, characterized in that: The heat dissipation housing assembly (1) has a large door (1c) and a small door (1d) on the front. The large door (1c) is installed at the door hole (1as). The front side of the heat dissipation housing has a front small hole (1at). There are convex structures on the left and right sides of the door hole (1as). The convex structure (1au) on the left side has a groove. There are multiple first small holes (1ay) on the inner wall of the groove. A water-absorbing bag (7) and an oxygen-consuming bag (8) are placed inside the groove structure. The water-absorbing bag contains calcium oxide. When there is water vapor inside the energy storage product, the water-absorbing bag will absorb it to prevent water vapor from affecting the performance of the energy storage product. The oxygen-consuming bag contains iron powder and sodium chloride. It is used to absorb oxygen in the energy storage product so that even if thermal runaway occurs in the lithium-ion battery module in a low oxygen content environment, the open flame and heat generated will be much less than in ordinary air, which is beneficial to improving product safety. A small door (1d) is installed on the outside of the convex structure. When the small door is closed, water vapor will not be able to enter the product from the outside.

5. A high-safety lithium-ion battery energy storage product based on new energy sources according to claim 1, characterized in that: It also includes a heat insulation shell (2), a wind control plate (3), a fan (9), a fan mounting bracket (10), a lithium-ion battery module (11), a module mounting bracket (12), and a wind guide block (13); the heat dissipation shell assembly has a module mounting bracket (12) inside, and multiple lithium-ion battery modules (11), a battery management system module, an inverter, and a fan mounting bracket are fixed to the module mounting bracket, and the fan is fixed to the fan mounting bracket; the heat insulation shell (2) has a left wall, a right wall, a rear wall (2a), and an upper wall, wherein the rear wall (2a) has multiple ventilation holes, and the heat insulation shell is arranged between the module mounting bracket and the heat dissipation shell assembly; the wind control plate (3) is rectangular in shape, thin in shape, and has multiple ventilation holes, and is arranged between the heat insulation shell and the heat dissipation shell assembly; the wind guide block (13) is arranged between the heat insulation shell and the heat dissipation shell assembly.

6. A high-safety lithium-ion battery energy storage product based on new energy sources according to claim 5, characterized in that: The air control plate consists of three pieces. One piece is located on the upper surface of the heat insulation shell, parallel to the line intersecting the rear side of the heat insulation shell with the upper surface, and 10mm away from the intersection line. Another piece is located on the left side of the heat insulation shell, parallel to the line intersecting the rear side of the heat insulation shell with the left side, and 10mm away from the intersection line. The third piece is located on the right side of the heat insulation shell, parallel to the line intersecting the rear side of the heat insulation shell with the right side, and 10mm away from the intersection line. Each of these air control plates has multiple ventilation holes with the same diameter, but the center distance between the holes is not the same. This is to control the airflow after the gas exits from the rear wall of the heat insulation shell and to rationally distribute the airflow through the upper, left, and right walls of the heat insulation shell. When the gas needs to dissipate heat, more flowing gas comes into contact with more inner surfaces of the heat dissipation shell, which is beneficial for heat dissipation.

7. A high-safety lithium-ion battery energy storage product based on new energy sources according to claim 1, characterized in that: It also includes a base plate (14), which has a recessed structure, namely a water tank (14a), at the bottom of the product. A small groove (14b) is provided at the base plate (14) between the heat dissipation component and the heat insulation shell. The bottom of the groove has an inclined angle and is located at the lowest point at the bottom inside the door. There are two electrode plates in this area, one of which is a positive electrode (14c) and the other is a negative electrode (14d). When water soaks the two electrode plates, the positive and negative electrodes are connected to form a current, which flows through the alarm bell to emit an alarm sound. At the same time, the alarm information is transmitted to the mobile phone, and the mobile phone receives the alarm information.

8. A high-safety lithium-ion battery energy storage product based on new energy sources according to claim 1, characterized in that: It also includes a water supply pipe (4), a water pump (5), and a faucet assembly (6). The faucet assembly (6) is located outside the heat dissipation assembly and includes a float (6a), a valve body part (6b), a handle (6c), and a water outlet pipe (6d). The float (6a) is a spherical hollow structure that can float on the water surface. The valve body part (6b) has a hemispherical structure and can rotate around an axis. This hemispherical structure is embedded in the water outlet pipe (6d) of the tap water. By rotating, it can control whether the water outlet pipe is dispensing water and the amount of water dispensed. The float (6a) floats on the water in the pool and is connected to the valve body part (6b) through the handle (6c). It can control whether the faucet is open or closed and the amount of water flow by controlling the rotation angle of the valve body part (6b) according to the water level. The water pump (5) is located outside the heat dissipation shell assembly and is connected to two water pipes. One end of one water pipe extends into the pool formed by the bottom plate, and the other water pipe, through the pressure of the water pump, delivers water to the first-level water storage area on the upper wall.

9. A high-safety lithium-ion battery energy storage product based on new energy sources according to claim 1, characterized in that: Multiple water guide plates (1av) are fixed on the left, right and rear sides of the heat dissipation shell (1a). These water guide plates are divided into multiple layers in the height direction, with multiple plates in each layer. Each water guide plate has multiple second small holes (1ava) at the bottom and small water baffles (1avb) on the outside. Long water baffles (1ax) are present at the intersection of the front, rear, left and right sides of the heat dissipation shell (1a). These structures are conducive to water contacting the surface of the heat dissipation shell more during the flow process, carrying away more heat. When the water flows to the water guide plates, it often tumbles and splashes, realizing more contact between the water and the air, which is conducive to heat dissipation. At the same time, the long water baffles (1ax) can prevent the water from splashing away from the heat dissipation shell and hitting people.

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