A lithium battery energy storage system with safety protection

Abstract

This invention relates to the field of lithium battery technology, specifically to a lithium battery energy storage system with safety protection. The system includes a lithium battery limiting mechanism and an electrode connection mechanism. The lithium battery limiting mechanism has several lithium batteries mounted on it. A lower protection mechanism and an upper protection mechanism are respectively provided on the outer surface of the lithium battery limiting mechanism to cover and seal it. In use, the lithium batteries are isolated by a battery mounting plate, an n-shaped isolation platform, and a longitudinal isolation plate, ensuring that all lithium batteries are individually separated. Simultaneously, the lower and upper protection mechanisms work together to protect the battery pack formed by the lithium batteries. If any lithium battery spontaneously combusts, the isolation between the lithium batteries effectively prevents the spread of combustion and slows down its spread, thus improving safety.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, and in particular to a lithium battery energy storage system with safety protection. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as the positive and negative electrode materials and a non-aqueous electrolyte solution. Lithium-ion batteries primarily rely on the movement of lithium ions between the positive and negative electrodes to achieve charging and discharging; this gives them excellent charge-discharge performance and a long lifespan, and they are often used as energy storage devices in new energy vehicles. To enhance energy storage capacity, for example, in new energy vehicles, several lithium-ion batteries are connected in series to form a battery pack, thereby increasing the battery's capacity.

[0003] During use, lithium batteries are prone to short circuits and spontaneous combustion if subjected to external impacts, overcharging / over-discharging, or high-temperature environments. Once a lithium battery spontaneously combusts, the fire spreads very rapidly. In existing lithium battery packs, the lithium batteries are tightly packed together. If one lithium battery spontaneously combusts, the remaining lithium batteries will also be ignited, causing a large-scale explosion risk.

[0004] Therefore, this application proposes a lithium battery energy storage system with safety protection to reduce the possibility of large-scale explosion of lithium batteries. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a lithium battery energy storage system with safety protection to solve the problem of lithium batteries being prone to large-scale explosion and combustion mentioned in the prior art.

[0006] To achieve the above and other related objectives, the present invention provides a lithium battery energy storage system with safety protection, including a lithium battery limiting mechanism and an electrode connection mechanism. The lithium battery limiting mechanism is provided with a plurality of lithium batteries, and the outer surface of the lithium battery limiting mechanism is respectively provided with a lower protection mechanism and an upper protection mechanism to cover and seal the lithium battery limiting mechanism.

[0007] The lithium battery limiting mechanism includes a battery mounting plate, on which a plurality of n-shaped isolation platforms are equidistantly arranged, and a plurality of longitudinal isolation plates are arranged in a cross-shaped manner with the n-shaped isolation platforms. The longitudinal isolation plates penetrate through the n-shaped isolation platforms, dividing the interior of the n-shaped isolation platforms into a plurality of independent spaces. Each independent space of the n-shaped isolation platform has an electrode connection cap at its inner top.

[0008] The lithium batteries are respectively located on both sides and inside the n-shaped isolation platform, so that all adjacent lithium batteries are separated. The electrodes of the lithium batteries located inside the n-shaped isolation platform are electrically connected to the electrode connection caps, and the electrodes of the lithium batteries located on the sides of the n-shaped isolation platform are connected to the electrode connection caps through the electrode connection mechanism, so that all lithium batteries are connected in series, and all electrode connections are insulated.

[0009] Preferably, a buffer cavity is provided between the inner walls of the n-shaped isolation platform, and the buffer cavity is filled with a plurality of buffer elements. The buffer elements are circular tubular structures and are elastic.

[0010] Preferably, the electrode connection cap includes a metal battery core, the bottom of the metal battery core is provided with a sleeve cap, the outer surface of the metal battery core is provided with an external thread groove, the metal battery core extends from the inner top of the n-shaped isolation platform to the outside of the n-shaped isolation platform, the external thread groove is connected to the through thread of the metal battery core, and the sleeve cap is connected to the electrode of the circulating water cooling pipe disposed inside the n-shaped isolation platform.

[0011] Preferably, the electrode connection mechanism includes a ceramic strip, which has a conductive sheet mounting compartment. Electrode connection holes are provided on both sides of the ceramic strip. Metal conductive sheets are provided on both sides inside the conductive sheet mounting compartment to match the electrode connection holes. A high-temperature fusible bridge is provided between the two metal conductive sheets, and the two metal conductive sheets are connected by the high-temperature fusible bridge.

[0012] Preferably, the high-temperature fused bridge piece is composed of several metal strips, and each metal strip has an insulating coating on its outer surface.

[0013] Preferably, the lower protection mechanism includes a lower sealing box, the top of which is provided with a battery limiting groove adapted to the lithium battery limiting mechanism, the side wall of which is provided with a circulating air duct with a front and rear circulation, and the circulating air duct is provided with a ventilation and heat dissipation vent extending to the outside of the lower sealing box.

[0014] The bottom of the lower sealing box is provided with a sandwich layer, in which a serpentine distribution of circulating water cooling pipes is provided, and the inlet and outlet of the circulating water cooling pipes extend to the outside of the lower sealing box.

[0015] The bottom of the lower sealing box is provided with a lower heat dissipation hole, which is connected to the interlayer at the bottom of the lower sealing box;

[0016] The inner bottom of the battery limiting groove is in close contact with the bottom of the battery mounting plate and the bottom of the lithium battery set inside the n-shaped isolation platform.

[0017] Preferably, the upper protection mechanism includes a sealing cover, a power terminal is provided on one side of the bottom of the sealing cover, a terminal block is provided on the side of the sealing cover near the power terminal, the power terminal and the terminal block are electrically connected, and the power terminal is electrically connected to the lithium battery;

[0018] The sealing cap is located at the top of the lower sealing box.

[0019] Preferably, the bottom of the sealing cover is provided with a battery isolation block, which is located between two adjacent electrode connection mechanisms to separate the adjacent electrode connection mechanisms, and the bottom of the battery isolation block overlaps with the top of the lithium battery installed between the two n-shaped isolation platforms.

[0020] The sealing cover has an internal cavity, and a heat-conducting component adapted to the position of the battery separator is provided in the cavity. A water supply pipe is provided on the side of the sealing cover, and the water supply pipe extends into the cavity and communicates with the heat-conducting component. The top of the sealing cover has an upper heat dissipation hole that communicates with the cavity.

[0021] A drain pipe is provided between the water supply pipe and the circulating water cooling pipe on the vertical line. The drain pipe is a T-shaped pipe.

[0022] Preferably, the heat-conducting component includes a hot water box, and the hot water box has an isolation component in the middle, which divides the hot water box into two independent chambers. Each of the two independent chambers is provided with a connecting pipe that connects to the corresponding chamber of the next heat-conducting component. The two chambers of the topmost hot water box are connected through the connecting pipe.

[0023] Each independent chamber is equipped with several baffles, which form a curved waterway within the independent chamber.

[0024] Preferably, the isolation element includes an isolation frame, and a flow-blocking membrane is provided between the inner walls of the isolation frame. The flow-blocking membrane is an elastic, permeable membrane that can expand and permeate water under pressure.

[0025] As described above, the lithium battery energy storage system with safety protection according to the present invention has the following beneficial effects:

[0026] This invention isolates lithium batteries by using a battery mounting plate, an n-shaped isolation platform, and a longitudinal isolation plate, ensuring that all lithium batteries are separated individually. At the same time, the battery pack formed by the lithium batteries is protected by a lower protection mechanism and an upper protection mechanism. When any lithium battery spontaneously combusts, the isolation between the lithium batteries effectively prevents the spread of combustion and slows down the spread rate, thus improving safety.

[0027] This invention incorporates a buffer cavity within an n-shaped isolation platform, filled with a buffer element. When the battery pack is subjected to external impact, the buffer cavity and buffer element deform to cushion the impact force, thereby reducing damage to the lithium battery. Furthermore, the buffer cavity provides isolation, reducing heat conduction speed in the event of spontaneous combustion of the lithium battery, thus improving safety. Simultaneously, a ceramic strip is incorporated, with a conductive sheet mounting chamber within it. This chamber houses a metal conductive sheet and a high-temperature fused bridge connecting to the lithium battery. When a short circuit occurs in the lithium battery, the high temperature causes the high-temperature fused bridge to melt and interrupt the current, further enhancing safety. Moreover, the fused high-temperature fused bridge is constrained by the ceramic strip, preventing it from simultaneously contacting multiple lithium batteries and causing a continuous short circuit.

[0028] This invention provides a lower heat dissipation hole in the lower sealed box, a heat-conducting component in the sealed cover, and connects the lower heat dissipation hole and the heat-conducting component to an external water pump for water circulation. The water circulation cools the lithium battery, and the lower and upper heat dissipation holes accelerate the heat dissipation of the circulating water cooling pipe and the heat-conducting component. A circulating air duct is set on the inner wall of the battery limiting groove and connected to the ventilation and heat dissipation port to form an air circulation, which is used to improve the heat dissipation speed of the lithium battery and achieve the effect of accelerating the heat dissipation of the lithium battery.

[0029] Meanwhile, the lower and upper heat dissipation holes allow water to drain outside the device when the water supply pipe or heat-conducting component is broken due to an external impact, preventing water from contacting the lithium battery and causing a short circuit.

[0030] This invention improves the heat absorption effect of water flow by setting up a hot water absorption box, separating it into two independent chambers with an insulating component, and setting a flow baffle in each independent chamber to divide it into a curved water channel.

[0031] Meanwhile, an isolation frame is installed to support the flow-blocking membrane. When one of the independent chambers is blocked, the water pressure in the independent chamber will open the flow-blocking membrane, connecting the two independent chambers, thus preventing high temperatures in some areas due to pipe blockage. Attached Figure Description

[0032] Figure 1 The diagram shown is a structural schematic of the present invention.

[0033] Figure 2 The diagram shows the installation schematic of the lithium battery limiting mechanism and the lithium battery of the present invention.

[0034] Figure 3 The diagram shown is a structural schematic of the lithium battery limiting mechanism of the present invention.

[0035] Figure 4The image shown is a bottom view of the lithium battery limiting mechanism of the present invention.

[0036] Figure 5 The diagram shown is a cross-sectional view of the structure of the n-shaped isolation platform of the present invention.

[0037] Figure 6 The diagram shown is a cross-sectional view of the electrode connection mechanism of the present invention.

[0038] Figure 7 The diagram shown is a structural schematic of the protective mechanism of this invention.

[0039] Figure 8 The diagram shown is a cross-sectional view of the protective mechanism of this invention.

[0040] Figure 9 The diagram shown is a structural schematic of the protective mechanism of this invention.

[0041] Figure 10 The diagram shown is a cross-sectional view of the protective mechanism of this invention.

[0042] Figure 11 The diagram shown is a cross-sectional view of the thermal conductive component of this invention.

[0043] Figure 12 The diagram shown is a structural schematic of the isolation component of this invention.

[0044] Component designation explanation:

[0045] 1. Lower protection mechanism; 11. Lower sealing box; 12. Battery limiting groove; 13. Ventilation and heat dissipation vent; 14. Circulating water cooling pipe; 15. Circulating air duct; 16. Lower heat dissipation hole;

[0046] 2. Upper protective mechanism; 21. Sealing cover; 22. Electrical terminal; 23. Terminal block; 24. Water supply pipe; 241. Heat-conducting component; 2411. Hot water absorption box; 2412. Isolation component; 24121. Isolation frame; 24122. Flow-blocking membrane; 2413. Connecting pipe; 2414. Flow-blocking plate; 25. Battery isolation block; 26. Upper heat dissipation hole;

[0047] 3. Lithium battery limiting mechanism; 31. Battery mounting plate; 32. N-shaped isolation platform; 321. Buffer cavity; 322. Buffer component; 33. Longitudinal isolation plate; 34. Electrode connection cap; 341. Metal battery cell; 342. Socket cap; 343. External thread groove;

[0048] 4. Lithium battery;

[0049] 5. Electrode connection mechanism; 51. Ceramic strip; 52. Conductivity sheet mounting compartment; 53. Electrode connection hole; 54. Metal conductivity sheet; 55. High-temperature fusible link;

[0050] 6. Drainage tube. Detailed Implementation

[0051] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0052] Please see Figures 1 to 12 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0053] like Figures 1-4 As shown, the present invention provides a lithium battery energy storage system with safety protection, including a lithium battery limiting mechanism 3 and an electrode connection mechanism 5. The lithium battery limiting mechanism 3 supports, fixes and isolates a plurality of lithium batteries 4. The outer surface of the lithium battery limiting mechanism 3 is respectively provided with a lower protection mechanism 1 and an upper protection mechanism 2 to cover and seal the lithium battery limiting mechanism 3, thereby isolating the lithium batteries 4 installed on the lithium battery limiting mechanism 3 from the outside.

[0054] Specifically, the lithium battery limiting mechanism 3 includes a battery mounting plate 31, on which several n-shaped isolation platforms 32 are equidistantly arranged, and several longitudinal isolation plates 33 are arranged in a cross pattern with the n-shaped isolation platforms 32. The longitudinal isolation plates 33 penetrate through the n-shaped isolation platforms 32, thereby dividing the top of the battery mounting plate 31 and the interior of the n-shaped isolation platforms 32 into several independent spaces for installing lithium batteries 4. When any lithium battery 4 spontaneously combusts, because the lithium batteries 4 are isolated from each other, the risk of large-scale combustion and deflagration caused by the ignition of other lithium batteries 4 can be avoided or reduced. Each independent space of the n-shaped isolation platform 32 is provided with an electrode connection cap 34 at its inner top.

[0055] Lithium batteries 4 are respectively located on both sides and inside the n-shaped isolation platform 32, thus separating all adjacent lithium batteries 4. The electrodes of the lithium batteries 4 located inside the n-shaped isolation platform 32 are electrically connected to the electrode connecting caps 34, and the electrodes of the lithium batteries 4 located on the sides of the n-shaped isolation platform 32 are connected to the electrode connecting caps 34 through the electrode connecting mechanism 5, so that all lithium batteries 4 are connected in series. This allows the lithium batteries 4 inside the n-shaped isolation platform 32 to be connected to the lithium batteries 4 outside the n-shaped isolation platform 32, while maintaining the isolation between the n-shaped isolation platforms 32. All electrode connections are insulated to avoid the risk of short circuits and leakage caused by exposed electrodes.

[0056] The battery mounting plate 31, the n-shaped isolation platform 32, and the longitudinal isolation plate 33 are all made of insulating and flame-retardant materials to further improve the safety of the lithium battery 4.

[0057] like Figure 5 As shown, in some embodiments, a buffer cavity 321 is provided between the inner walls of the n-shaped isolation platform 32 of the present invention, so that the wall surface of the n-shaped isolation platform 32 can deform when an impact occurs, thereby reducing the damage of external impact force to the lithium battery 4 through the deformation of the wall surface of the n-shaped isolation platform 32; the buffer cavity 321 is filled with a plurality of buffer members 322 for supporting the wall surface of the n-shaped isolation platform 32, so as to avoid deformation of the wall surface of the n-shaped isolation platform 32 due to slight impact; the buffer member 322 is a circular tubular structure and has elasticity, so that when external impact force acts on the buffer member 322, the buffer member 322 can deform and dissipate the force through the hollow structure and elastic force, so as to achieve a better buffering effect.

[0058] like Figure 5 As shown, in some embodiments, the electrode connection cap 34 of the present invention includes a metal battery cell 341, and a sleeve cap 342 is provided at the bottom of the metal battery cell 341. Both the metal battery cell 341 and the sleeve cap 342 are made of conductive metal material. The outer surface of the metal battery cell 341 is provided with an external thread groove 343. The metal battery cell 341 penetrates from the inner top of the n-shaped isolation platform 32 to the outside of the n-shaped isolation platform 32. The external thread groove 343 is connected to the through thread of the metal battery cell 341, so that the electrode connection cap 34 can be easily disassembled and assembled. Different types of lithium batteries 4 can be adapted by replacing the electrode connection cap 34 with different models. The sleeve cap 342 is connected to the electrode of the circulating water cooling pipe 14 provided inside the n-shaped isolation platform 32, so that the lithium battery 4 is connected to the electrode connection mechanism 5 through the electrode connection cap 34, thereby improving the sealing of the inside of the n-shaped isolation platform 32. Compared with the direct connection of the electrode of the lithium battery 4 through the top of the n-shaped isolation platform 32 to the electrode connection mechanism 5, it can prevent the flame of the lithium battery 4 from igniting other lithium batteries 4 through the through hole when the lithium battery 4 spontaneously combusts.

[0059] like Figure 6As shown, in some embodiments, the electrode connection mechanism 5 of the present invention includes a ceramic strip 51, a conductive sheet mounting chamber 52 is provided in the ceramic strip 51, and electrode connection holes 53 are respectively provided on both sides of the ceramic strip 51. Metal conductive sheets 54 are respectively provided on both sides inside the conductive sheet mounting chamber 52 to be adapted to the electrode connection holes 53. The electrode of the lithium battery 4 contacts the metal conductive sheet 54 through the electrode connection hole 53 to achieve conductivity. A high-temperature fusible bridge piece 55 that is easy to melt is provided between the two metal conductive sheets 54, and the two metal conductive sheets 54 are connected by the high-temperature fusible bridge piece 55.

[0060] When a short circuit occurs in lithium battery 4, the high temperature generated by the short circuit will cause the high-temperature fuse bridge piece 55 to melt. After the high-temperature fuse bridge piece 55 melts, the power supply to the entire battery pack will be interrupted, thereby preventing the short circuit from damaging the other lithium batteries 4. At this time, the ceramic strip 51 is used to cover the melted high-temperature fuse bridge piece 55 to prevent it from contacting the electrodes of the surrounding lithium batteries 4 and causing a new short circuit. It can also prevent the high temperature caused by the short circuit from damaging the lithium batteries 4.

[0061] like Figure 6 As shown, in some embodiments, the high-temperature fusible bridge piece 55 of the present invention is composed of several metal strips, so that the high-temperature fusible bridge piece 55 can melt more easily when the lithium battery 4 is short-circuited; the outer surface of each metal strip is provided with an insulating coating to avoid contact between the metal strips, and after the metal strips are energized, it can prevent the phenomenon of sparks or open flames caused by contact between the metal strips.

[0062] like Figure 7 and Figure 8 As shown, in some embodiments, the lower protection mechanism 1 of the present invention includes a lower sealing box 11. The top of the lower sealing box 11 is provided with a battery limiting groove 12 adapted to the lithium battery limiting mechanism 3 for supporting and limiting the lithium battery limiting mechanism 3. The side wall of the battery limiting groove 12 is provided with a circulating air duct 15 with a front and rear circulation. The circulating air duct 15 is provided with a ventilation and heat dissipation port 13 that extends to the outside of the lower sealing box 11. The external airflow enters the interior of the circulating air duct 15 through the ventilation and heat dissipation port 13 on one side of the lower sealing box 11, and then blows out from the ventilation and heat dissipation port 13 on the other side to improve the heat dissipation performance of the lower sealing box 11.

[0063] The bottom of the lower sealing box 11 is provided with a sandwich layer, in which a serpentine distribution of circulating water cooling pipes 14 is provided. The inlet and outlet of the circulating water cooling pipes 14 extend to the outside of the lower sealing box 11 and are arranged side by side. When the circulating water cooling pipes 14 are connected to an external water pump, the water pump can draw water from the water tank and circulate it in the circulating water cooling pipes 14, thereby cooling the lower sealing box 11, improving the thermal conductivity of the lower sealing box 11 to the lithium battery 4, and reducing the high temperature of the lithium battery 4.

[0064] The bottom of the lower sealing box 11 is provided with a lower heat dissipation hole 16, which is connected to the interlayer at the bottom of the lower sealing box 11. External air can come into contact with the circulating water cooling pipe 14 through the lower heat dissipation hole 16, thereby further improving the heat dissipation performance of the circulating water cooling pipe 14. At the same time, when the circulating water cooling pipe 14 is damaged by external impact, the circulating water in the circulating water cooling pipe 14 can be discharged into the interior of the lower sealing box 11 through the lower heat dissipation hole 16 to avoid the circulating water from coming into contact with the lithium battery 4 and causing leakage or short circuit.

[0065] The inner bottom of the battery limiting groove 12 is in close contact with the bottom of the battery mounting plate 31 and the bottom of the lithium battery 4 disposed inside the n-shaped isolation platform 32. The bottom and wall of the battery limiting groove 12 absorb the heat of the lithium battery 4 during operation for heat dissipation. At the same time, the inner bottom of the battery limiting groove 12 is in contact with the bottom of the battery mounting plate 31, thereby isolating the lithium battery 4 located in the n-shaped isolation platform 32 and improving the sealing performance.

[0066] like Figure 9 and Figure 10 As shown, in some embodiments, the upper protection mechanism 2 of the present invention includes a sealing cover 21. A power terminal 22 is provided on one side of the bottom of the sealing cover 21, and a terminal block 23 is provided on the side of the sealing cover 21 near the power terminal 22. The power terminal 22 and the terminal block 23 are electrically connected, and the power terminal 22 is electrically connected to the lithium battery 4, while the terminal block 23 is connected to an external power supply or charging device, thereby realizing the purpose of charging the lithium battery 4 and discharging to an external device. The sealing cover 21 is sealed on the top of the lower sealing box 11 to completely isolate the lithium battery 4 and reduce the impact of the external environment on the lithium battery 4.

[0067] like Figure 1 , Figure 9 and Figure 10 As shown, in some embodiments, the bottom of the sealing cover 21 of the present invention is provided with a battery isolation block 25. The battery isolation block 25 is located between two adjacent electrode connection mechanisms 5 to separate the adjacent electrode connection mechanisms 5. The bottom of the battery isolation block 25 overlaps with the top of the lithium battery 4 between the two n-shaped isolation platforms 32, thereby isolating the lithium battery 4 from both sides of the n-shaped isolation platform 32 and improving the sealing performance. At the same time, the battery isolation block 25 contacts the top of the lithium battery 4, thereby absorbing heat from the lithium battery 4 through the water supply pipe 24 and improving the heat dissipation performance of the lithium battery 4.

[0068] The sealing cover 21 has an internal cavity containing a heat-conducting element 241 that is adapted to the position of the battery separator 25. A water supply pipe 24 is located on the side of the sealing cover 21, extending into the cavity and communicating with the heat-conducting element 241. A water pump connected to the water supply pipe 24 injects circulating water into the heat-conducting element 241. The heat absorbed by the battery separator 25 is carried away through the circulation of water, thereby improving the heat dissipation of the lithium battery 4. The top of the sealing cover 21 has an upper heat dissipation hole 26 that communicates with the cavity. Air comes into contact with the heat-conducting element 241 through the upper heat dissipation hole 26, thereby further improving the heat dissipation performance of the heat-conducting element 241. At the same time, when the heat-conducting element 241 is damaged by an external impact, the circulating water can be discharged through the upper heat dissipation hole 26, preventing the circulating water from coming into contact with the lithium battery 4 and causing leakage or short circuit of the lithium battery 4.

[0069] A drain pipe 6 is provided between the water supply pipe 24 and the circulating water cooling pipe 14 on the vertical line. The drain pipe 6 is a T-shaped pipe, so that water can be circulated through the same water pump, thereby improving the utilization rate of the water pump. Furthermore, by connecting the circulating water cooling pipe 14 and the water supply pipe 24 through the drain pipe 6, the connection between the lower sealing box 11 and the sealing cover 21 can be reinforced, thereby improving the stability of the connection between the lower sealing box 11 and the sealing cover 21.

[0070] like Figure 11 As shown, in some embodiments, the heat-conducting component 241 of the present invention includes a hot water absorption box 2411. The hot water absorption box 2411 is provided with an isolation component 2412 in the middle. The isolation component 2412 divides the hot water absorption box 2411 into two independent chambers, one of which is a water inlet chamber and the other is a water outlet chamber. Both independent chambers are provided with a connecting pipe 2413 to communicate with the corresponding chamber of the next heat-conducting component 241. The two chambers of the topmost hot water absorption box 2411 are connected by the connecting pipe 2413. Circulating water is injected into the water inlet chamber through the connecting pipe 2413 and flows into the next water inlet chamber through the connecting pipe 2413. Finally, it circulates into the water outlet chamber through the connecting pipe 2413 connecting the two chambers to form a complete cycle.

[0071] Each independent chamber is equipped with several baffles 2414, which form curved water channels in the independent chamber. The baffles 2414 can slow down the flow rate of the water to increase the residence time of the water and thus improve the heat absorption efficiency of the water.

[0072] like Figure 12As shown, in some embodiments, the isolation component 2412 of the present invention includes an isolation frame 24121, with a flow-blocking membrane 24122 disposed between the inner walls of the isolation frame 24121. The isolation frame 24121 and the flow-blocking membrane 24122 cooperate to separate the chambers in the hot water absorption box 2411. The flow-blocking membrane 24122 is an elastic, permeable membrane. Under normal circumstances, the flow-blocking membrane 24122 is impermeable under its own elastic pressure. The flow-blocking membrane 24122 can expand and permeate water under pressure. When a blockage occurs between the connecting pipe 2413 and / or the flow-blocking plate 2414, the water pressure gradually increases, pressurizing the flow-blocking membrane 24122, causing it to deform and expand, thus preventing the water flow from being unable to circulate normally due to blockage. Using the flow-blocking membrane 24122 to achieve water circulation at the blockage is a temporary solution. When the temperature monitoring equipment detects abnormal heat dissipation, maintenance of the blockage is still required.

[0073] In summary, the lithium battery energy storage system of the present invention, with its safety protection, isolates the lithium batteries 4 by setting up a battery mounting plate 31, an n-shaped isolation platform 32, and a longitudinal isolation plate 33, so that all lithium batteries 4 are separated individually. At the same time, the battery pack formed by the lithium batteries 4 is protected by the lower protection mechanism 1 and the upper protection mechanism 2. When any lithium battery 4 spontaneously combusts, the isolation between the lithium batteries 4 can effectively prevent the spread of combustion and slow down the spread rate, thereby improving safety.

[0074] This invention utilizes an n-shaped isolation platform 32 to create a buffer cavity 321, which is filled with a buffer element 322. When the battery pack is subjected to external impact, the buffer cavity 321 and the buffer element 322 can deform to buffer the impact force, thereby reducing damage to the lithium battery 4. Furthermore, the buffer cavity 321 provides isolation, reducing the heat conduction rate in the event of spontaneous combustion of the lithium battery 4, thus improving safety. Simultaneously, a ceramic strip 51 is provided, within which a conductive sheet mounting chamber 52 is set. A metal conductive sheet 54 and a high-temperature fused bridge piece 55 are placed in the conductive sheet mounting chamber 52 to connect to the lithium battery 4. When a short circuit occurs in the lithium battery 4, the high temperature will cause the high-temperature fused bridge piece 55 to melt and cut off the current, further enhancing safety. Moreover, the high-temperature fused bridge piece 55, after melting, is constrained by the ceramic strip 51, preventing it from simultaneously contacting multiple lithium batteries 4 and causing a continuous short circuit.

[0075] The present invention provides a lower heat dissipation hole 16 in the lower sealed box 11, a heat-conducting component 241 in the sealed cover 21, and connects the lower heat dissipation hole 16 and the heat-conducting component 241 to an external water pump for water circulation. The lithium battery 4 is cooled by water circulation. The heat dissipation of the circulating water cooling pipe 14 and the heat-conducting component 241 is accelerated by the lower heat dissipation hole 16 and the upper heat dissipation hole 26. A circulating air duct 15 is provided on the inner wall of the battery limiting groove 12 and connected to the ventilation and heat dissipation port 13 to form an air circulation, which is used to improve the heat dissipation speed of the lithium battery 4 and achieve the effect of accelerating the heat dissipation of the lithium battery 4.

[0076] Meanwhile, the lower heat dissipation hole 16 and the upper heat dissipation hole 26, when the entire device is subjected to external impact and the water supply pipe 24 or the heat conduction component 241 is broken, can drain water out of the device through the lower heat dissipation hole 16 and the upper heat dissipation hole 26, thus preventing water from contacting the lithium battery 4 and causing a short circuit in the lithium battery 4.

[0077] The present invention provides a hot water absorption box 2411, in which an isolation member 2412 is provided to separate two independent chambers, and a flow baffle 2414 is provided in the independent chambers to separate them into curved water channels, thereby increasing the time for the water to pass through the heat-conducting member 241, thereby improving the heat absorption effect of the water flow.

[0078] Meanwhile, an isolation frame 24121 is set up to support the flow-blocking membrane 24122. When one of the independent chambers is blocked, the water pressure in the independent chamber will open the flow-blocking membrane 24122, so that the two independent chambers are connected, thereby avoiding high temperature in some areas due to pipe blockage.

[0079] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A lithium battery energy storage system with safety protection, characterized in that, It includes a lithium battery limiting mechanism (3) and an electrode connection mechanism (5). The lithium battery limiting mechanism (3) is provided with a plurality of lithium batteries (4). The outer surface of the lithium battery limiting mechanism (3) is provided with a lower protection mechanism (1) and an upper protection mechanism (2) to cover and seal the lithium battery limiting mechanism (3). The lithium battery limiting mechanism (3) includes a battery mounting plate (31). The battery mounting plate (31) is provided with a plurality of n-shaped isolation platforms (32) at equal intervals. The battery mounting plate (31) is provided with a plurality of longitudinal isolation plates (33) arranged in a cross shape with the n-shaped isolation platforms (32). The longitudinal isolation plates (33) penetrate through the n-shaped isolation platforms (32) to divide the interior of the n-shaped isolation platforms (32) into a plurality of independent spaces. Each independent space of the n-shaped isolation platform (32) is provided with an electrode connection cap (34) at its inner top. The lithium batteries (4) are respectively located on both sides of the n-shaped isolation platform (32) and inside the n-shaped isolation platform (32), so that all adjacent lithium batteries (4) are separated. The electrodes of the lithium batteries (4) inside the n-shaped isolation platform (32) are electrically connected to the electrode connection caps (34). The electrodes of the lithium batteries (4) on the side of the n-shaped isolation platform (32) are connected to the electrode connection caps (34) through the electrode connection mechanism (5), so that all lithium batteries (4) are connected in series. All electrode connections are insulated.

2. The lithium battery energy storage system with safety protection according to claim 1, characterized in that: The inner wall of the n-shaped isolation platform (32) is provided with a buffer cavity (321), and the buffer cavity (321) is filled with a number of buffer elements (322). The buffer elements (322) are circular tubular structures and are elastic.

3. The lithium battery energy storage system with safety protection according to claim 1, characterized in that: The electrode connection cap (34) includes a metal battery cell (341), a sleeve cap (342) is provided at the bottom of the metal battery cell (341), an external thread groove (343) is provided on the outer surface of the metal battery cell (341), the metal battery cell (341) extends from the inner top of the n-shaped isolation platform (32) to the outside of the n-shaped isolation platform (32), the external thread groove (343) is connected to the through thread of the metal battery cell (341), and the sleeve cap (342) is connected to the electrode of the circulating water cooling pipe (14) provided inside the n-shaped isolation platform (32).

4. The lithium battery energy storage system with safety protection according to claim 1, characterized in that: The electrode connection mechanism (5) includes a ceramic strip (51), a conductive sheet mounting chamber (52) is provided in the ceramic strip (51), and electrode connection holes (53) are provided on both sides of the ceramic strip (51). Metal conductive sheets (54) are provided on both sides of the conductive sheet mounting chamber (52) to match the electrode connection holes (53). A high-temperature fusible bridge piece (55) that is easy to melt is provided between the two metal conductive sheets (54), and the two metal conductive sheets (54) are connected by the high-temperature fusible bridge piece (55).

5. The lithium battery energy storage system with safety protection according to claim 4, characterized in that: The high-temperature fused bridge piece (55) is composed of several metal strips, and each metal strip has an insulating coating on its outer surface.

6. The lithium battery energy storage system with safety protection according to any one of claims 1-5, characterized in that: The lower protection mechanism (1) includes a lower sealing box (11). The top of the lower sealing box (11) is provided with a battery limiting groove (12) that is adapted to the lithium battery limiting mechanism (3). The side wall of the battery limiting groove (12) is provided with a circulating air duct (15) that circulates from head to tail. The circulating air duct (15) is provided with a ventilation and heat dissipation port (13) that extends to the outside of the lower sealing box (11). The bottom of the lower sealing box (11) is provided with a sandwich layer, in which a serpentine circulating water cooling pipe (14) is provided, and the inlet and outlet of the circulating water cooling pipe (14) extend to the outside of the lower sealing box (11). The bottom of the lower sealing box (11) is provided with a lower heat dissipation hole (16), and the lower heat dissipation hole (16) is connected to the interlayer at the bottom of the lower sealing box (11). The inner bottom of the battery limiting groove (12) is in close contact with the bottom of the battery mounting plate (31) and the bottom of the lithium battery (4) set inside the n-shaped isolation platform (32).

7. The lithium battery energy storage system with safety protection according to claim 6, characterized in that: The upper protection mechanism (2) includes a sealing cover (21), a power terminal (22) is provided on one side of the bottom of the sealing cover (21), a terminal block (23) is provided on the side of the sealing cover (21) near the power terminal (22), the power terminal (22) and the terminal block (23) are electrically connected, and the power terminal (22) is electrically connected to the lithium battery (4); The sealing cap (21) is sealed on the top of the lower sealing box (11).

8. The lithium battery energy storage system with safety protection according to claim 7, characterized in that: The bottom of the sealing cover (21) is provided with a battery isolation block (25). The battery isolation block (25) is located between two adjacent electrode connection mechanisms (5) to separate the adjacent electrode connection mechanisms (5). The bottom of the battery isolation block (25) overlaps with the top of the lithium battery (4) between the two n-shaped isolation platforms (32). The sealing cover (21) has an internal cavity, and a heat-conducting element (241) adapted to the position of the battery separator (25) is provided in the cavity. A water supply pipe (24) is provided on the side of the sealing cover (21), and the water supply pipe (24) extends into the cavity and communicates with the heat-conducting element (241). The top of the sealing cover (21) has an upper heat dissipation hole (26) that communicates with the cavity. A drain pipe (6) is provided between the water supply pipe (24) and the circulating water cooling pipe (14) on the vertical line, and the drain pipe (6) is a T-shaped pipe.

9. The lithium battery energy storage system with safety protection according to claim 8, characterized in that: The heat-conducting component (241) includes a hot water absorption box (2411), and the hot water absorption box (2411) is provided with an isolation component (2412) in the middle. The isolation component (2412) divides the hot water absorption box (2411) into two independent chambers. Each of the two independent chambers is provided with a connecting pipe (2413) to communicate with the corresponding chamber of the next heat-conducting component (241). The two chambers of the topmost hot water absorption box (2411) are connected through the connecting pipe (2413). Each independent chamber is equipped with several baffles (2414), which form curved waterways in the independent chamber.

10. The lithium battery energy storage system with safety protection according to claim 9, characterized in that: The isolation component (2412) includes an isolation frame (24121), and a flow-blocking membrane (24122) is provided between the inner walls of the isolation frame (24121). The flow-blocking membrane (24122) is an elastic water-permeable membrane, and the flow-blocking membrane (24122) can expand and permeate water under pressure.

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