Modular energy storage battery cabinet with thermal runaway prevention function

Abstract

The application relates to the technical field of battery energy storage cabinets, and discloses a modular energy storage battery cabinet with a heat runaway prevention function, which comprises a battery cabinet shell and a partition plate integrally connected inside the battery cabinet shell, a battery main body is installed on the partition plate, a water cooling box is installed on the side of the battery cabinet shell, a cooling coil is installed between the partition plate and the battery main body, a water cooling spiral pipe is arranged in the water cooling box, a heat runaway water inlet and a heat runaway water outlet are intermittently and respectively arranged in the water cooling spiral pipe, and expansion balls are arranged at the pipe openings of the heat runaway water inlet and the heat runaway water outlet. The battery module is completely disconnected from the external circuit, when the temperature of the battery rises, the gas in the expansion air bag expands and extends, the track rod at the side of the expansion air bag slides in the arc-shaped groove and the track groove, the fixed cylinder is driven to rotate, the gear ring is threadedly unlocked with the first clamping ring and the second clamping ring, and the heat runaway is prevented from spreading to the adjacent module through the conductive component.

Description

Technical Field

[0001] The present invention relates to the technical field of battery energy storage cabinets, and in particular to a modular energy storage battery cabinet with a thermal runaway prevention function. Background Art

[0002] Modular energy storage battery cabinets utilize electrochemical energy storage technology to achieve flexible storage and dispatch of electrical energy. They consist of standardized modules composed of lithium-ion battery cells connected in series or parallel. Multiple modules are integrated into the cabinet in a plug-in configuration, supporting horizontal or vertical expansion to meet varying capacity requirements. An external power source converts AC power to DC power via a bidirectional energy storage converter, charging the battery modules in a constant current / voltage mode, achieving electrical to chemical energy storage. The battery modules release chemical energy, which is then inverted by the PCS into AC output to meet grid peak load or load power requirements. As a key component of modern energy systems, energy storage battery cabinets offer a core advantage in enabling efficient storage and flexible dispatch of electrical energy through technological integration and intelligent management, bringing multi-dimensional value to power grids, businesses, and individual users. Thermal runaway is one of the most serious safety risks in battery systems. It is essentially a chain reaction of exothermic reactions triggered by internal or external factors, resulting in a rapid and uncontrollable increase in battery temperature. Thermal runaway not only directly damages the battery but can also lead to catastrophic consequences such as fire and explosion.

[0003] Currently, battery modules are tightly arranged in series / parallel. Runaway cells rapidly heat adjacent cells through heat conduction and radiation, triggering the surrounding battery separators to melt and cause internal short circuits. Therefore, this does not meet existing needs. To address this, we have proposed a modular energy storage battery cabinet with anti-thermal runaway function. Summary of the Invention

[0004] The present invention provides a modular energy storage battery cabinet with a thermal runaway prevention function, which has the beneficial effect of completely disconnecting the battery module from the external circuit, which can not only stop the abnormal current from continuing to generate heat, but also prevent thermal runaway from spreading to adjacent modules through conductive components. It solves the problem mentioned in the above background technology that the runaway battery cell quickly heats the adjacent battery cells through heat conduction and heat radiation, triggering the melting of the surrounding battery diaphragms and causing internal short circuits.

[0005] The present invention provides the following technical solution: a modular energy storage battery cabinet with a thermal runaway prevention function, comprising a battery cabinet shell and a partition integrally connected to the inside of the battery cabinet shell, a battery body mounted on the partition, a water cooling box mounted on the side of the battery cabinet shell, a cooling coil mounted between the partition and the battery body, a water cooling spiral pipe disposed inside the water cooling box, a thermal runaway water inlet and a thermal runaway water outlet intermittently connected in the middle of the water cooling spiral pipe, and expansion balls disposed at the thermal runaway water inlet and the thermal runaway water outlet.

[0006] As an optional solution for a modular energy storage battery cabinet with thermal runaway protection function described in the present invention, the thermal runaway water inlet and the thermal runaway water outlet pipe are respectively provided with a sealing disk, a telescopic column is connected between the sealing disk and the inner wall of the water cooling box, a return spring is provided on the outside of the telescopic column, one end of the return spring is fixedly connected to the side of the sealing disk, and the other end of the return spring is connected to the inner wall of the water cooling box.

[0007] As an optional solution for a modular energy storage battery cabinet with thermal runaway protection function described in the present invention, the inner wall of the water cooling box is connected to a limit frame, an expansion ball is connected to the inside of the limit frame, and the expansion ball is in intermittent contact with the sealing disk.

[0008] As an optional solution for a modular energy storage battery cabinet with thermal runaway protection function described in the present invention, wherein: the inner wall of the battery cabinet shell is respectively provided with a water outlet cavity and a water inlet cavity, the water cooling spiral pipe, the water outlet cavity and the water inlet cavity are connected, and the thermal runaway water inlet, the thermal runaway water outlet and the water cooling spiral pipe are used in conjunction with each other.

[0009] As an optional solution for a modular energy storage battery cabinet with thermal runaway protection function described in the present invention, a first snap ring is installed on the side of the battery body, a wire is detachably connected between the two first snap rings, the end of the wire is connected to a second snap ring, and a gear ring is provided on the outer side of the second snap ring and the first snap ring. A parts box is also installed on the side of the battery body, and a drive gear that meshes with the gear ring is provided inside the parts box.

[0010] As an optional solution for a modular energy storage battery cabinet with thermal runaway prevention function described in the present invention, the second clamping ring is slidably engaged with the first clamping ring, an expansion ring is provided inside the first clamping ring, the second clamping ring is fitted with the expansion ring, the inner wall of the gear ring is provided as a threaded section, the outer sides of the first clamping ring and the second clamping ring are provided as threaded sections, the gear ring is threadedly connected to the outer sides of the first clamping ring and the second clamping ring, the side of the expansion ring is connected to a first air pipe, the other end of the first air pipe is connected to an expansion airbag, and the first air pipe intermittently connects the expansion ring and the expansion airbag.

[0011] As an optional solution for a modular energy storage battery cabinet with thermal runaway protection function described in the present invention, an air ventilation cavity is provided inside the expansion airbag, two fixed blocks are fixedly connected to the inner wall of the air ventilation cavity, baffles are provided inside the two fixed blocks, grooves are provided on the sides of the fixed blocks, and a connecting spring is connected between the groove and the baffle.

[0012] As an optional solution for a modular energy storage battery cabinet with thermal runaway protection function described in the present invention, wherein: the inner wall of the parts box is connected to a fixed cylinder, the expansion airbag is located inside the fixed cylinder, an arc-shaped groove is opened on the side of the fixed cylinder, the side of the expansion airbag is connected to a track rod, the track rod passes through the side of the arc-shaped groove, the track rod is slidably engaged with the arc-shaped groove, and the drive gear is fixedly connected to the other end of the fixed cylinder.

[0013] As an optional solution for a modular energy storage battery cabinet with thermal runaway protection function described in the present invention, wherein: a through slot is opened on the side of the parts box, the drive gear passes through the side of the through slot, a track slot is opened on the top of the parts box, the track rod passes through the interior of the track slot, and the track rod is slidably engaged with the track slot.

[0014] As an optional solution for a modular energy storage battery cabinet with thermal runaway protection function described in the present invention, the battery main body is provided in three groups, and each group has the same configuration, the battery cabinet shell side is rotatably connected to an opening and closing door, and the opening and closing door side is connected to a handle.

[0015] The present invention has the following beneficial effects:

[0016] 1. This modular energy storage battery cabinet, which protects against thermal runaway, has a thermal runaway water inlet and outlet located in the middle of the water-cooling spiral tube. When the temperature inside the water-cooling box rises, the refrigerant in the second half absorbs heat, causing the temperature to rise, significantly reducing the cooling efficiency. Simultaneously, the nitrogen inside the expansion bulb expands due to the heat, pushing up the sealing disk, forcibly discharging the high-temperature refrigerant and injecting new, lower-temperature refrigerant, achieving liquid replacement and preventing the spread of thermal runaway. When the coolant temperature is too high, the heat exchange capacity decreases, and the risk of thermal runaway increases exponentially.

[0017] 2. This modular energy storage battery cabinet with thermal runaway prevention function is equipped with an expansion airbag. When the battery temperature rises, the gas inside the expansion airbag expands and extends, causing the gear ring to unlock the threads of the first and second locking rings. This can effectively prevent the spread of thermal runaway, significantly reduce the possibility of safety accidents, and ensure the safety of personnel and the surrounding environment.

[0018] 3. In this modular energy storage battery cabinet with thermal runaway prevention function, when the temperature continues to rise, the gas inside the expanding airbag pushes the baffle, and the baffle drives the connecting spring to pull up, so that the expanded gas inside the air passage cavity flows to the expansion ring through the first air pipe. The expansion ring becomes larger and squeezes the second clamping ring, so that the second clamping ring is separated from the first clamping ring. After the wires are separated, the battery module is completely disconnected from the external circuit, and the abnormal current stops and continues to generate heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 For the present invention Figure 1 A is an enlarged structural diagram of FIG.

[0021] Figure 3 It is a schematic diagram of the top view of the cross-section structure of the present invention.

[0022] Figure 4 It is a side view schematic diagram of the cross-section structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the front view cutaway structure of the present invention.

[0024] Figure 6 It is a schematic diagram of the side cutaway structure of the water cooling box of the present invention.

[0025] Figure 7 This is a schematic diagram of the cutaway structure of the parts box of the present invention.

[0026] Figure 8 It is a schematic diagram of the fixed cylinder structure of the present invention.

[0027] Figure 9 It is a schematic diagram of the expansion ring structure of the present invention.

[0028] Figure 10 Schematic diagram of the sealing disk structure of the present invention.

[0029] Figure 11 Schematic diagram of the baffle structure of the present invention.

[0030] Figure: 10, battery cabinet housing; 101, partition; 102, water outlet chamber; 103, water inlet chamber; 104, cooling coil; 20, battery body; 201, first snap ring; 2011, expansion ring; 2012, first air pipe; 202, wire; 203, second snap ring; 204, gear ring; 30, water cooling box; 30, water outlet; 303, water cooling spiral pipe; 304, thermal runaway water inlet; 3041, blocking disk; 3042, telescopic column; 3043, reset Spring; 3044, limit frame; 3045, expansion ball; 305, thermal runaway water outlet; 40, parts box; 401, second air pipe; 402, fixing cylinder; 403, expansion airbag; 4031, air passage cavity; 4032, fixing block; 4033, baffle; 4034, groove; 4035, connecting spring; 404, driving gear; 405, track rod; 406, arc groove; 407, track groove; 408, through groove; 409, opening and closing door; 410, handle. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1

[0033] This embodiment aims to solve the problem that when the coolant temperature is too high, the heat exchange capacity decreases and the heat generated during the battery charging and discharging process cannot be effectively removed, resulting in an exponential increase in the risk of thermal runaway. Figure 1-11 A modular energy storage battery cabinet with thermal runaway prevention function includes a battery cabinet housing 10 and a partition 101 integrally connected to the battery cabinet housing 10. A battery body 20 is mounted on the partition 101. A water cooling box 30 is mounted on the side of the battery cabinet housing 10. A cooling coil 104 is installed between the partition 101 and the battery body 20. A water cooling spiral tube 303 is provided inside the water cooling box 30. A thermal runaway water inlet 304 and a thermal runaway water outlet 305 are intermittently connected in the middle of the water cooling spiral tube 303. The thermal runaway water inlet 304 and the thermal runaway water outlet 305 are respectively provided with expansion balls 3045.

[0034] It should be noted that a water inlet and a water outlet are provided at both ends of the water-cooling spiral tube 303, and a water pump is also provided inside the water-cooling spiral tube 303. In the prior art, the water-cooling spiral tube 303 system often adopts a single water row with built-in dual water pump design, and drives two groups of spiral tubes such as the first water row tube group and the second water row tube group respectively through independent water pumps to avoid the problem of cross-flow of hot and cold water and ensure the uniformity of heat absorption of each water cooling head. I will not go into details here.

[0035] The thermal runaway water inlet 304 and the thermal runaway water outlet 305 are respectively provided with a blocking disk 3041, which is located in the interface between the water-cooling spiral tube 303 and the thermal runaway water inlet 304 and the thermal runaway water outlet 305. A telescopic column 3042 is connected between the blocking disk 3041 and the inner wall of the water-cooling box 30. A return spring 3043 is sleeved on the outer side of the telescopic column 3042. One end of the return spring 3043 is fixedly connected to the side of the blocking disk 3041, and the other end of the return spring 3043 is connected to the inner wall of the water-cooling box 30.

[0036] The sealing disk 3041 is made of high-temperature resistant and corrosion-resistant metal or ceramic composite materials, and its edge is embedded with an annular sealing ring. Under normal circumstances, it is tightly attached to the pipe mouth under the pre-tightening force of the reset spring 3043 to achieve complete sealing. The telescopic column 3042 is a multi-stage nested guide structure with a sliding rail inside to ensure that the sealing disk 3041 only moves along the axial direction to avoid sealing failure caused by deflection.

[0037] In this embodiment: a thermal runaway water inlet 304 and a thermal runaway water outlet 305 are set in the middle of the water-cooling spiral tube 303. Under normal circumstances, the sealing disk 3041 is close to the tube mouth under the pre-tightening force of the return spring 3043 to achieve complete sealing. When the internal temperature of the water-cooling box 30 increases, the temperature of the refrigerant in the second half rises due to heat absorption, and the cooling efficiency decreases significantly. At the same time, the nitrogen inside the expansion ball 3045 expands due to heat, lifts the sealing disk 3041, and pulls up the return spring 3043. The thermal runaway water inlet 304 and the thermal runaway water outlet 305 are connected to the water-cooling spiral tube 303. In the prior art, the high-temperature refrigerant is forced to be discharged and low-temperature new liquid is injected under the action of the water pump to achieve liquid replacement, thereby avoiding as much as possible the exponential increase in the risk of thermal runaway caused by the coolant temperature being too high.

[0038] Example 2

[0039] This embodiment is intended to help solve the problem that a runaway cell rapidly heats adjacent cells through heat conduction and radiation, triggering the surrounding battery separators to melt and causing an internal short circuit. This embodiment is an improvement based on embodiment 1. For details, please refer to Figure 1-11 The inner wall of the battery cabinet shell 10 is respectively provided with a water outlet cavity 102 and a water inlet cavity 103, and the water cooling spiral tube 303, the water outlet cavity 102 and the water inlet cavity 103 are connected. The thermal runaway water inlet 304, the thermal runaway water outlet 305 and the water cooling spiral tube 303 are used in conjunction with each other. The side of the inner wall of the battery cabinet shell 10 close to the water cooling box 30 is used as the total coolant inlet and is connected to the water cooling spiral tube 303. A diversion is set inside the cavity to ensure that the coolant is evenly distributed to the cooling coil 104 at the bottom of each battery body 20. The inner wall of the battery cabinet shell and the side away from the water cooling box 30 are used as the total coolant outlet, which collects the return water of each cooling coil 104.

[0040] A first snap ring 201 is installed on the side of the battery body 20, and a wire 202 is detachably connected between the two first snap rings 201. The end of the wire 202 is connected to a second snap ring 203. The second snap ring 203 and the first snap ring 201 are both provided with a gear ring 204 on the outside. A parts box 40 is also installed on the side of the battery body 20. A driving gear 404 is provided inside the parts box 40 to mesh with the gear ring 204. The second snap ring 203 is slidably engaged with the first snap ring 201, and the first snap ring 201 is provided with a gear ring 204 on the inside. An expansion ring 2011 is provided, and a second clamping ring 203 is fitted with the expansion ring 2011. The inner wall of the gear ring 204 is provided with a threaded section. The outer sides of the first clamping ring 201 and the second clamping ring 203 are provided with threaded sections. The gear ring 204 is threadedly connected to the outer sides of the first clamping ring 201 and the second clamping ring 203. A first air tube 2012 is connected to the side of the expansion ring 2011. The other end of the first air tube 2012 is connected to the expansion airbag 403. The first air tube 2012 intermittently connects the expansion ring 2011 and the expansion airbag 403.

[0041] The fixed cylinder 402 is installed in the spare box 40, the side wall is provided with an arc-shaped guide groove, the movement path of the track rod 405 is limited, the track rod 405 moves along the predetermined track when the air bag is inflated, one end of the track rod 405 is fixed to the surface of the inflation air bag 403, the other end passes through the arc-shaped groove 406 and is connected with the shaft of the driving gear 404, the linear inflation of the air bag is converted into the rotary motion of the driving gear 404, the driving gear 404 is installed in the spare box 40 and meshes with the outer gear ring 204, when the track rod moves, the driving gear 404 rotates, the gear ring 204 rotates out, and the threaded connection of the first joint ring and the second joint ring 203 is quickly separated.

[0042] In the embodiment, when the temperature of the battery rises, the gas in the inflation air bag 403 expands and extends, the track rod 405 on the side of the inflation air bag 403 slides in the arc-shaped groove 406 and the track groove 407, thereby driving the fixed cylinder 402 to rotate, the driving gear 404 at the end of the fixed cylinder 402 also rotates and meshes with the gear ring 204, so that the gear ring 204 is unlocked from the threaded connection with the first joint ring 201 and the second joint ring 203, and the heat runaway is prevented from spreading to adjacent modules through the conductive part.

[0043] Embodiment 3

[0044] The embodiment is intended to promote the solution to the problem that the first joint ring 201 and the second joint ring 203 are not separated in time, and the embodiment is an improvement based on the embodiment 1, for details, please refer to Figure 1-11 The inflation air bag 403 is internally provided with a gas passage cavity 4031, two fixed blocks 4032 are fixedly connected to the inner wall of the gas passage cavity 4031, baffles 4033 are arranged in the fixed blocks 4032, recesses 4034 are formed in the side of the fixed blocks 4032, connecting springs 4035 are connected between the recesses 4034 and the baffles 4033, a fixed cylinder 402 is connected to the inner wall of the spare box 40, the inflation air bag 403 is located in the inside of the fixed cylinder 402, an arc-shaped groove 406 is formed in the side of the fixed cylinder 402, a track rod 405 is connected to the side of the inflation air bag 403, the track rod 405 passes through the side of the arc-shaped groove 406 and is slidably connected with the arc-shaped groove 406, and a driving gear 404 is fixedly connected to the other end of the fixed cylinder 402.

[0045] In the normal state, the baffle 4033 tightly abuts against the recess 4034 of the fixed block 4032 under the pulling force of the connecting spring 4035, completely seals the gas passage cavity 4031 and prevents the gas from flowing from the inflation ring 2011 to the air bag, thereby maintaining the air plug in the contracted state.

[0046] When the temperature rises, the nitrogen in the inflation air bag 403 expands, the gas pressure pushes the baffle 4033 to move out of the groove 4034, compresses the connecting spring 4035, and the gas cavity 4031 is opened, and the gas flows to the inflation ring 2011.

[0047] The part box 40 is provided with a through groove 408 on the side, the drive gear 404 passes through the side of the through groove 408, the part box 40 is provided with a track groove 407 on the top, the track rod 405 passes through the inside of the track groove 407, and the track rod 405 is slidably connected with the track groove 407, the battery main body 20 is provided with three groups, and each group is configured the same, the battery cabinet shell 10 is rotatably connected with a hinged door 409 on the side, and the hinged door 409 is connected with a handle 410 on the side.

[0048] In the embodiment: by setting the baffle 4033, when the temperature continues to rise, the gas in the inflation air bag 403 pushes the baffle 4033, the baffle 4033 drives the connecting spring 4035 to be pulled up, so that the gas in the gas cavity 4031 expands and flows to the inflation ring 2011 through the first gas pipe 2012, the inflation ring 2011 is enlarged to press the second clamping ring 203, so that the second clamping ring 203 is separated from the first clamping ring 201, the battery module is completely disconnected with the circuit, and the abnormal current continues to generate heat. From the safety point of view, the abnormal current heat termination can effectively avoid a series of safety hazards caused by overheating of the battery. Overheating may cause damage to the internal structure of the battery, electrolyte leakage, and even cause serious accidents such as combustion and explosion. The device can cut off the circuit in time to prevent danger and ensure the safety of personnel and equipment.

[0049] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus that includes a list of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such a process, method, article or apparatus.

[0050] The above description is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A modular energy storage battery cabinet with a thermal runaway prevention function, comprising a battery cabinet housing (10) and a partition (101) integrally connected to the interior of the battery cabinet housing (10), a battery body (20) being mounted on the partition (101), and a water cooling box (30) being mounted on the side of the battery cabinet housing (10), characterized in that: A cooling coil (104) is installed between the partition (101) and the battery body (20); a water-cooling spiral tube (303) is provided inside the water-cooling box (30); a thermal runaway water inlet (304) and a thermal runaway water outlet (305) are intermittently connected in the middle of the water-cooling spiral tube (303); and expansion balls (3045) are provided at the pipe openings of the thermal runaway water inlet (304) and the thermal runaway water outlet (305); The thermal runaway water inlet (304) and the thermal runaway water outlet (305) are respectively provided with a blocking disk (3041), a telescopic column (3042) is connected between the blocking disk (3041) and the inner wall of the water cooling box (30), and a return spring (3043) is sleeved on the outer side of the telescopic column (3042), one end of the return spring (3043) is fixedly connected to the side of the blocking disk (3041), and the other end of the return spring (3043) is connected to the inner wall of the water cooling box (30); The inner wall of the water cooling box (30) is connected to the limiting frame (3044), the internal gas of the expansion ball (3045) is set to nitrogen, the expansion ball (3045) is connected to the inside of the limiting frame (3044), and the expansion ball (3045) is in intermittent contact with the sealing disk (3041).

2. The modular energy storage battery cabinet with thermal runaway protection function according to claim 1, characterized in that: The inner wall of the battery cabinet housing (10) is respectively provided with a water outlet cavity (102) and a water inlet cavity (103); the water cooling spiral tube (303), the water outlet cavity (102) and the water inlet cavity (103) are connected; the thermal runaway water inlet (304), the thermal runaway water outlet (305) and the water cooling spiral tube (303) are used in conjunction with each other.

3. The modular energy storage battery cabinet with thermal runaway protection function according to claim 1, characterized in that: A first snap ring (201) is installed on the side of the battery body (20), a wire (202) is detachably connected between the two first snap rings (201), an end of the wire (202) is connected to a second snap ring (203), and a gear ring (204) is provided on the outside of the second snap ring (203) and the first snap ring (201). A parts box (40) is also installed on the side of the battery body (20), and a driving gear (404) is provided inside the parts box (40) and is engaged with the gear ring (204).

4. The modular energy storage battery cabinet with thermal runaway protection according to claim 3, characterized in that: The second locking ring (203) is slidably engaged with the first locking ring (201); an expansion ring (2011) is provided inside the first locking ring (201); the second locking ring (203) is fitted with the expansion ring (2011); the inner wall of the gear ring (204) is provided with a threaded section; the outer sides of the first locking ring (201) and the second locking ring (203) are provided with threaded sections; the gear ring (204) is threadedly connected to the outer sides of the first locking ring (201) and the second locking ring (203); a first air tube (2012) is connected to the side of the expansion ring (2011); the other end of the first air tube (2012) is connected to an expansion air bag (403); and the first air tube (2012) intermittently connects the expansion ring (2011) and the expansion air bag (403).

5. The modular energy storage battery cabinet with thermal runaway protection function according to claim 4, characterized in that: An air vent cavity (4031) is provided inside the expansion airbag (403), two fixed blocks (4032) are fixedly connected to the inner wall of the air vent cavity (4031), baffles (4033) are provided inside the two fixed blocks (4032), grooves (4034) are provided on the sides of the fixed blocks (4032), and a connecting spring (4035) is connected between the groove (4034) and the baffles (4033).

6. The modular energy storage battery cabinet with thermal runaway protection according to claim 4, characterized in that: The inner wall of the parts box (40) is connected to a fixed cylinder (402), the expansion airbag (403) is located inside the fixed cylinder (402), the side of the fixed cylinder (402) is provided with an arc groove (406), the side of the expansion airbag (403) is connected to a track rod (405), the track rod (405) passes through the side of the arc groove (406), the track rod (405) and the arc groove (406) are slidably engaged, and the driving gear (404) is fixedly connected to the other end of the fixed cylinder (402).

7. The modular energy storage battery cabinet with thermal runaway protection according to claim 6, characterized in that: A through slot (408) is provided on the side of the parts box (40), the driving gear (404) passes through the side of the through slot (408), a track slot (407) is provided on the top of the parts box (40), the track rod (405) passes through the inside of the track slot (407), and the track rod (405) is slidably engaged with the track slot (407).

8. The modular energy storage battery cabinet with thermal runaway protection according to claim 1, characterized in that: The battery main body (20) is provided in three groups, and each group has the same configuration. The side of the battery cabinet housing (10) is rotatably connected to an opening and closing door (409), and the side of the opening and closing door (409) is connected to a handle (410).

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