Lower insulating assembly, end cover assembly, energy storage device and electric appliance

Abstract

The application provides a lower insulation assembly, an end cover assembly, an energy storage device and an electric equipment. The lower insulation assembly comprises a lower insulation piece and a support block. In the lower insulation piece, the air permeable hole is located on one side of the boss, the groove is arranged correspondingly with the boss, the groove has a first groove side wall surface opposite to the first peripheral surface and a first groove wall surface opposite to the third surface; the air outlet hole penetrates through the first peripheral surface and the first groove side wall surface and is communicated with the air permeable hole, and the air inlet hole penetrates through the third surface and the first groove wall surface. The support block is installed in the groove, the support block has a first side surface opposite to the first groove side wall surface and a fourth surface opposite to the first groove wall surface, the support block is provided with a first exhaust passage, a first air inlet of the first exhaust passage is located on the fourth surface and is arranged correspondingly with the first air inlet hole, a first air outlet of the first exhaust passage is located on the first side surface and is arranged correspondingly with the air outlet hole.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a lower insulation component, an end cap component, an energy storage device, and an electrical device. Background Technology

[0002] With the increasingly widespread application of energy storage devices, their safety performance has become a major concern. Existing energy storage devices often incorporate a support structure within the lower insulation component to ensure that the support structure can consistently press against the battery cell assembly in the event of thermal runaway. However, the inclusion of this support structure can impede the venting channels of the lower insulation component, hindering the venting of the energy storage device and posing a significant safety hazard, thus reducing the device's safety and reliability. Utility Model Content

[0003] This application provides a lower insulation component, an end cap component, an energy storage device, and an electrical device to ensure good venting performance of the energy storage device and improve its safety performance.

[0004] This application provides a lower insulation component for use in an energy storage device, including a lower insulation member and a support block. The lower insulation member has a first surface and a second surface, and the first surface and the second surface are disposed opposite to each other along the thickness direction of the lower insulation member.

[0005] The lower insulating member is provided with a boss, which is provided on the second surface and is used to abut against the battery cell assembly in the energy storage device. The boss has a first peripheral surface and a third surface, and the third surface is connected to the first peripheral surface.

[0006] The lower insulating component is further provided with a vent hole, a groove, an outlet hole, and an inlet hole. The vent hole penetrates the first surface and the second surface, and is located on one side of the boss and is opposite to the first circumferential surface. The opening of the groove is located on the first surface. The groove is corresponding to the boss. The groove has a first groove sidewall and a first groove wall. The first groove sidewall is located on the side of the groove facing the vent hole and is opposite to the first circumferential surface. The first groove wall is connected to the first groove sidewall and is opposite to the third surface. The outlet hole penetrates the first circumferential surface and the first groove sidewall and communicates with the groove and the vent hole. The inlet hole penetrates the third surface and the first groove wall and communicates with the groove.

[0007] The support block is installed in the groove. The support block has a first side surface and a fourth surface. The first side surface is disposed opposite to the side wall of the first groove. The fourth surface is connected to the first side surface and is disposed opposite to the side wall of the first groove. The support block is provided with a first exhaust channel. The first exhaust channel has a first air inlet and a first air outlet. The first air inlet is located on the fourth surface and is disposed corresponding to the first air inlet hole. The first air outlet is located on the first side surface and is disposed corresponding to the air outlet hole.

[0008] The lower insulating member is further provided with a second air inlet, which penetrates the third surface and the first groove wall and communicates with the groove, and is spaced apart from the first air inlet.

[0009] The support block is provided with a second exhaust channel, which has a second air inlet and a second air outlet. The second air inlet is located on the fourth surface and is corresponding to the second air inlet hole, and is spaced apart from the first air inlet. The second air outlet is located on the first side and is corresponding to the air outlet hole.

[0010] The lower insulating component is further provided with a third air inlet hole, which penetrates the third surface and the first groove wall and communicates with the groove, and is spaced apart from the first air inlet hole and the second air inlet hole.

[0011] The support block is also provided with a third exhaust channel, which has a third air inlet and a third air outlet. The third air inlet is located on the fourth surface and is corresponding to the third air inlet hole, and is spaced apart from the first air inlet and the second air inlet. The third air outlet is located on the first side and is corresponding to the air outlet hole.

[0012] The third surface includes a second circumferential surface, a third circumferential surface, and a boss surface. Along the length of the lower insulating member, the second circumferential surface and the third circumferential surface are arranged opposite to each other and are both connected to the first circumferential surface. The boss surface is located on the side of the second surface away from the first surface and is connected between the second circumferential surface and the third circumferential surface, and is used to abut against the battery cell assembly.

[0013] The first groove wall includes a second groove side wall, a third groove side wall, and a groove bottom wall. Along the length of the lower insulating member, the second groove side wall and the third groove side wall are arranged opposite to each other and are both connected to the first groove side wall. The second groove side wall is arranged opposite to the second circumferential surface, and the third groove side wall is arranged opposite to the third circumferential surface. The groove bottom wall is arranged opposite to the opening of the groove and is connected between the second groove side wall and the third groove side wall. It is arranged opposite to the surface of the boss and is also connected to the first groove side wall.

[0014] The first air inlet penetrates the side wall of the second groove and the second peripheral surface; the second air inlet penetrates the side wall of the third groove and the third peripheral surface; and the third air inlet penetrates the bottom wall of the groove and the surface of the boss.

[0015] The fourth surface also includes a second side, a third side, and a fourth side. Along the length of the lower insulating component, the second side and the third side are arranged opposite to each other and are both connected to the first side. The second side is arranged opposite to the side wall of the second groove, the third side is arranged opposite to the side wall of the third groove, and the fourth side is connected between the second side and the third side, and is arranged opposite to the bottom wall of the groove and connected to the first side.

[0016] The first air inlet is located on the second side, the second air inlet is located on the third side, and the third air inlet is located on the fourth side.

[0017] The first air inlet also penetrates the bottom wall of the groove and the surface of the boss, and / or the second air inlet also penetrates the bottom wall of the groove and the surface of the boss.

[0018] The first air outlet, the second air outlet, and the third air outlet overlap.

[0019] The second side is spaced apart from the second groove sidewall, and the third side is spaced apart from the third groove sidewall.

[0020] The support block is further provided with a first clearance groove, the opening of which is located on the fourth side, and the first clearance groove passes through the second side and the third side.

[0021] The fourth surface further includes a fifth side surface, which is disposed opposite to the first side surface and connected to the fourth side surface, and is connected between the second side surface and the third side surface;

[0022] There are two first clearance slots. Along the width direction of the lower insulating component, the two first clearance slots are spaced apart. One first clearance slot penetrates the first side surface, and the other first clearance slot penetrates the fifth side surface.

[0023] The support block also has a sixth side surface, which faces the same direction as the first surface, is connected to the first side surface, and is connected between the second side surface and the third side surface.

[0024] The support block is also provided with a second clearance groove, the opening of which is located on the sixth side surface, and the second clearance groove extends through the second side surface and the third side surface.

[0025] The fourth surface further includes a fifth side surface, which is disposed opposite to the first side surface and connected to the sixth side surface, and is connected between the second side surface and the third side surface;

[0026] There are two second clearance slots, which are spaced apart. One second clearance slot passes through the first side and the other second clearance slot passes through the fifth side.

[0027] In the direction from the opening of the groove towards the bottom wall of the groove, the distance between the second groove sidewall and the third groove sidewall gradually decreases.

[0028] Wherein, the angle between the second groove sidewall and the thickness direction of the lower insulating member is greater than or equal to 0 degrees and less than or equal to 10 degrees, and / or, the angle between the third groove sidewall and the thickness direction of the lower insulating member is greater than or equal to 0 degrees and less than or equal to 10 degrees.

[0029] The first side surface includes a first chamfered surface, a second chamfered surface, and a first connecting surface. The first chamfered surface is connected to the second side surface, the second chamfered surface is connected to the third side surface, and the first connecting surface is connected between the first chamfered surface and the second chamfered surface.

[0030] The fourth surface further includes a fifth side surface, which is disposed opposite to the first side surface and connected between the second side surface and the third side surface. The fifth side surface includes a third chamfered surface, a fourth chamfered surface, and a second connecting surface. The third chamfered surface is connected to the second side surface, the fourth chamfered surface is connected to the third side surface, and the second connecting surface is connected between the third chamfered surface and the fourth chamfered surface.

[0031] The support block also has a sixth side surface, which faces the same direction as the first surface. The sixth side surface is located on the side of the first surface closer to the second surface, or the sixth side surface is flush with the first surface.

[0032] There are two bosses, which are located on opposite sides of the vent hole along the width of the lower insulating member.

[0033] There are two grooves, and each groove is provided in correspondence with one of the bosses;

[0034] There are two support blocks, and each support block is installed in one of the grooves.

[0035] This application also provides an end cap assembly, including the lower insulation component, end cap and explosion-proof valve described above, wherein the end cap is located on the side of the first surface away from the second surface, and the end cap is provided with an explosion-proof hole, which is disposed opposite to the vent hole;

[0036] The explosion-proof valve is installed on the end cap and covers the explosion-proof hole.

[0037] The projection of the vent hole on the explosion-proof valve covers the opening area of ​​the explosion-proof valve.

[0038] This application also provides an energy storage device, which includes a housing, a battery cell assembly, and the aforementioned end cap assembly. The housing has a receiving cavity and an opening. The receiving cavity is located inside the housing and contains an electrolyte. The opening is located on the top side of the receiving cavity and communicates with the receiving cavity. The battery cell assembly is housed in the receiving cavity. The end cap assembly is mounted on the housing, closes the opening, and is electrically connected to the battery cell assembly. The boss abuts against the battery cell assembly.

[0039] This application also provides an electrical device, including the energy storage device described above, which is used to supply power to the electrical device.

[0040] The lower insulation component, end cap component, energy storage device, and electrical equipment provided in this embodiment, by providing a first exhaust channel on the support block and an exhaust port and an intake port on the boss, allow the gas inside the energy storage device to pass sequentially through the intake port, the first exhaust channel, and the exhaust port, and then enter the vent hole, thereby reaching the area below the explosion-proof valve of the energy storage device, and being discharged with the opening of the explosion-proof valve. This facilitates the rapid discharge of gas inside the energy storage device, improving the exhaust performance and safety performance of the energy storage device. Attached Figure Description

[0041] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0042] Figure 1a This is a schematic diagram of the structure of an energy storage system according to an embodiment of this application;

[0043] Figure 1b This is a schematic diagram of the energy storage device structure provided in this application;

[0044] Figure 2 yes Figure 1b The diagram shows the structure of the end cap assembly in the energy storage device.

[0045] Figure 3 yes Figure 2 The exploded view of the end cap assembly is shown.

[0046] Figure 4 yes Figure 2 The diagram shows a cross-sectional view of the end cap assembly after it has been cut along point AA.

[0047] Figure 5 yes Figure 2 The diagram shows a cross-sectional view of the end cap assembly taken along point BB.

[0048] Figure 6 yes Figure 2 The diagram shows a cross-sectional view of the end cap assembly taken along point CC.

[0049] Figure 7 yes Figure 3 An exploded view of the lower insulation component in the end cap assembly shown.

[0050] Figure 8 yes Figure 7 The diagram shows the structure of the lower insulating component in the lower insulating assembly.

[0051] Figure 9 yes Figure 8 The diagram shows the structure of the lower insulating component from another angle.

[0052] Figure 10 yes Figure 3 A schematic diagram of the structure of the lower insulating component cut along DD in the lower insulating assembly shown in the figure;

[0053] Figure 11 yes Figure 3 The diagram shows a cross-section of the lower insulating component along point DD.

[0054] Figure 12 yes Figure 3 The diagram below shows the structural schematic of the support block in the lower insulation assembly;

[0055] Figure 13 yes Figure 12 A schematic diagram of the support block shown at another angle;

[0056] Figure 14 yes Figure 13 A schematic diagram of the structure of the support block after it has been cut open along EE.

[0057] Figure 15 yes Figure 3 The diagram below shows the gas flow path in the lower insulation component;

[0058] Figure 16 yes Figure 5 The diagram shows the gas flow path in the end cap assembly.

[0059] Reference numerals: Energy storage device 1000, Energy storage system 400, High-voltage cable 410, First power conversion device 420, Second power conversion device 430, Housing 2000, End cap assembly 3000, Opening 2001, Lower insulation assembly 100, End cap 200, Explosion-proof valve 300, Protective plate 450, Pole post 500, Pressure block 600, Upper insulation component 700, Sealing ring 800, Lower insulation component 110, Support block 150 First surface 111, second surface 112, peripheral side surface 113, boss 120, first peripheral surface 125, third surface b, boss surface 121, second peripheral surface 123, third peripheral surface 124, fourth peripheral surface 126, vent 130, first pole post hole 135, groove 140, air outlet 40, air inlet a, first groove side wall 144, first groove wall c, groove bottom wall 141, second groove side wall 142, third groove side wall Wall 143, Fourth groove side wall 145, First air inlet 20, Second air inlet 25, Third air inlet 10, First side surface 155, Fourth surface d, Sixth side surface 151, First chamfered surface 1, Second chamfered surface 2, First connecting surface 155a, Fourth side surface 152, Second side surface 153, Third side surface 154, Fifth side surface 156, Third chamfered surface 3, Fourth chamfered surface 4, Second connecting surface 156a, Clearance groove 160 First exhaust channel 11, second exhaust channel 12, third exhaust channel 13, first clearance groove 161, second clearance groove 162, first air inlet 11a, first air outlet 11b, second air inlet 12a, second air outlet 12b, third air inlet 13a, third air outlet 13b, explosion-proof hole 210, second pole post hole 220, valve opening area 310, fixing area 320, third pole post hole 710, fourth pole post hole 610. Detailed Implementation

[0060] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0061] Because the energy we need is highly time- and space-dependent, in order to utilize energy rationally and improve energy efficiency, it is necessary to store one form of energy in the same way or by converting it into another, and then release it in a specific energy form for future applications. Currently, the main way to generate green electricity is to develop green energy sources such as photovoltaics and wind power to replace fossil fuels.

[0062] Currently, the generation of green electricity generally relies on solar, wind, and hydropower. However, wind and solar power are generally characterized by strong intermittency and large fluctuations, which can cause grid instability, insufficient power during peak demand periods, and excessive power during off-peak periods. Unstable voltage can also damage the power grid. Therefore, insufficient electricity demand or insufficient grid capacity may lead to the problem of "wind and solar curtailment." Solving these problems requires energy storage. This involves converting electrical energy into other forms of energy through physical or chemical means and storing it. When needed, this energy can be converted back into electrical energy and released. Simply put, energy storage is like a large "power bank," storing electrical energy when solar and wind power are abundant and releasing the stored electricity when needed.

[0063] Taking electrochemical energy storage as an example, this solution provides an energy storage device for use in energy storage systems. The energy storage device is equipped with a set of chemical batteries, which mainly use the chemical elements in the batteries as energy storage media. The charging and discharging process is accompanied by the chemical reaction or change of the energy storage media. Simply put, the electrical energy generated by wind and solar energy is stored in the chemical batteries. When the use of external electrical energy reaches its peak, the stored electricity is released for use, or transferred to places with a shortage of electricity for use.

[0064] Current energy storage applications are quite widespread, including generation-side energy storage, grid-side energy storage, and consumption-side energy storage. The corresponding types of energy storage devices include:

[0065] (1) Large-scale energy storage power stations applied to wind power and photovoltaic power stations can assist renewable energy power generation in meeting grid connection requirements and improve the utilization rate of renewable energy. As a high-quality active / reactive power regulation power source on the power supply side, energy storage power stations can achieve load matching of power in time and space, enhance the absorption capacity of renewable energy, reduce instantaneous power changes, reduce the impact on the power grid, improve the absorption of new energy power generation, and are of great significance in power grid system backup, alleviating peak load power supply pressure and peak regulation and frequency regulation.

[0066] (2) Energy storage containers applied on the grid side mainly function as peak shaving, frequency regulation and grid congestion relief. In terms of peak shaving, they can realize peak shaving and valley filling of electricity load, that is, charging the energy storage battery when the electricity load is low and releasing the stored electricity during the peak electricity load period, thereby achieving a balance between power production and consumption.

[0067] (3) Small energy storage cabinets applied to the electricity consumption side mainly function as self-consumption of electricity, peak-valley price arbitrage, capacity cost management, and improvement of power supply reliability. Depending on the application scenario, electricity consumption side energy storage can be divided into industrial and commercial energy storage cabinets, household energy storage devices, energy storage charging piles, etc., which are generally used in conjunction with distributed photovoltaics. Industrial and commercial users can use energy storage for peak-valley price arbitrage and capacity cost management. In the electricity market implementing peak-valley pricing, by charging the energy storage system when the electricity price is low and discharging the energy storage system when the electricity price is high, peak-valley price arbitrage can be achieved, reducing electricity costs. In addition, industrial enterprises subject to two-part tariffs can use energy storage systems to store energy during off-peak hours and discharge during peak loads, thereby reducing peak power and the maximum demand declared, achieving the goal of reducing capacity charges. Household photovoltaics with energy storage can improve the level of self-consumption of electricity. Due to high electricity prices and poor power supply stability, the demand for household photovoltaic installations is driven. Given that photovoltaic power generation occurs during the day, while user load is generally higher at night, configuring energy storage can better utilize photovoltaic power, improve self-consumption levels, and reduce electricity costs. Furthermore, energy storage is needed in areas such as communication base stations and data centers for backup power.

[0068] In some embodiments, see Figure 1a , Figure 1a This is a schematic diagram of the structure of an energy storage system 400 according to an embodiment of this application, and this application Figure 1a The embodiments are illustrated using a shared energy storage scenario on the generation / distribution side as an example. The energy storage device 1000 of this application is not limited to its generation / distribution side energy storage scenario.

[0069] This application provides an energy storage system 400, which includes: a high-voltage cable 410, a first power conversion device 420, a second power conversion device 430, and an energy storage device 1000 provided in this application. In some embodiments of the power generation scenario, the second power conversion device 430 can be a wind power conversion device. Since the electricity generated by wind power conversion is volatile, random, and intermittent, the unstable electricity output by the wind power conversion device can be stored in the energy storage device 1000 through grid connection. The energy storage device 1000 is connected to the high-voltage cable 410 and outputs smooth electricity to the power consumption side of the distribution network, realizing peak shaving and frequency regulation, and stable grid operation; or, wind power... The energy conversion device is always connected to the high-voltage cable 410. Under normal power generation conditions, the power output of the wind power conversion device is supplied to the power consumption side of the distribution network through the high-voltage cable. When the current power load is low and the wind power conversion device generates excess power, the excess power is first stored in the energy storage device 1000 to reduce wind and solar curtailment rates and improve the problem of new energy power generation consumption. When the power load is high, the power grid issues an instruction to transmit the power stored in the energy storage device 1000 together with the high-voltage cable 410 in grid-connected mode to supply power to the power consumption side. This provides the power grid with various services such as peak shaving, frequency regulation, and backup, giving full play to the peak shaving role of the power grid, promoting peak shaving and valley filling, and alleviating the power supply pressure of the power grid.

[0070] In some embodiments on the distribution network side, the first power conversion device 420 can be a photovoltaic power conversion device. The energy storage device 1000 is connected to the high-voltage cable 410 and installed downstream of the high-voltage cable 410 between the user load and the user load. The electrical energy output by the photovoltaic power conversion device is stored in the energy storage device 1000, which can respond in a timely manner to act as a backup power source when the power grid / distribution network fails. Alternatively, it can provide power supply support to alleviate line congestion when the high-voltage cable 410 transmission line is blocked, and to delay the economic pressure caused by the expansion of the power grid / distribution capacity when the power grid is planned to be expanded.

[0071] Optionally, the first power conversion device may include, but is not limited to, a wind power conversion device, and the second power conversion device may include, but is not limited to, a photovoltaic power conversion device. The first power conversion device 420 and the second power conversion device 430 can convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy, and mechanical energy into electrical energy.

[0072] Optionally, the energy storage device 1000 may include, but is not limited to, energy storage applications such as energy storage power stations, hydropower / thermal / wind power generation systems, solar power generation systems, mobile power systems, smart home systems, or temporary power supply systems, and may also be applied in multiple fields such as data centers, military equipment, aerospace, charging piles, and electric vehicles.

[0073] Optionally, the energy storage device 1000 may include, but is not limited to, single-cell batteries, or battery modules, battery packs, battery clusters, power banks, energy storage cabinets / containers, and other battery integrated systems composed of single-cell batteries. The actual application form of the energy storage device 1000 provided in this application embodiment may be, but is not limited to, the listed products, and may also be other application forms. This application embodiment does not strictly limit the application form of the energy storage device 1000. This application embodiment only uses a multi-cell battery as an example for illustration.

[0074] Please see Figure 1b , Figure 1b This is a schematic diagram of the energy storage device 1000 provided in this application.

[0075] This application provides an energy storage device 1000, which may include, but is not limited to, single-cell batteries, battery modules, battery packs, and battery systems. The single-cell battery can be a rechargeable battery, meaning a battery that can be reactivated by charging after discharge and continue to be used. Single-cell batteries can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and this application does not specifically limit their types. The actual application form of the energy storage device provided in this application embodiment can be, but is not limited to, the listed products, and can also be other application forms. This application embodiment does not strictly limit the application form of the energy storage device 1000. This application embodiment uses a square battery as an example to illustrate the energy storage device 1000.

[0076] Please refer to the following: Figure 2 , Figure 2 yes Figure 1b The diagram shows the structure of the end cap assembly 3000 in the energy storage device 1000.

[0077] The energy storage device 1000 includes a housing 2000, a battery cell assembly, and an end cap assembly 3000. The housing 2000 has a receiving cavity (not shown) and an opening 2001. The receiving cavity is located inside the housing 2000 and contains an electrolyte. The opening 2001 is located on the top side of the receiving cavity and communicates with it. The housing 2000 may be made of aluminum; for example, the housing 2000 may be an aluminum shell. The electrode assembly is housed in the receiving cavity. The electrode assembly can be immersed in the electrolyte. The end cap assembly 3000 is mounted on the housing 2000, closes the opening 2001, and is electrically connected to the battery cell assembly.

[0078] Please see Figure 3 and Figure 4 , Figure 3 yes Figure 2 The diagram shows an exploded view of the end cap assembly 3000. Figure 4 yes Figure 2The diagram shows a cross-sectional view of the end cap assembly 3000 after it is cut along point AA.

[0079] In this embodiment, the end cap assembly 3000 includes a lower insulating assembly 100, an end cap 200, an explosion-proof valve 300, a protective plate 450, a pole 500, a pressure block 600, an upper insulating component 700, and a sealing ring 800. Along the thickness direction of the end cap assembly 3000, the end cap 200 is mounted on one side of the lower insulating assembly 100. Both the explosion-proof valve 300 and the protective plate 450 are mounted on the end cap 200. The upper insulating component 700 is mounted on the side of the end cap 200 opposite to the lower insulating assembly 100. There are two upper insulating components 700; one serves as the positive electrode upper insulating component, and the other as the negative electrode upper insulating component. Along the length direction of the end cap assembly 3000, the positive and negative electrode upper insulating components are arranged alternately. The pressure block 600 is located on the side of the end cap 200 away from the lower insulating assembly 100 and is mounted on the upper insulating component 700. There are two pressure blocks 600. One pressure block 600 serves as the positive electrode pressure block and is installed on the positive electrode upper insulating component. The other pressure block 600 serves as the negative electrode pressure block and is installed on the negative electrode upper insulating component. Along the thickness direction of the end cap assembly 3000, the pole post 500 passes through the lower insulating assembly 100, the end cap 200, the upper insulating component 700, and the pressure block 600. There are two pole posts 500. One pole post 500 serves as the positive electrode pole post and passes through the positive electrode upper insulating component and the positive electrode pressure block. The other pole post 500 serves as the negative electrode pole post and passes through the negative electrode upper insulating component and the negative electrode pressure block.

[0080] A sealing ring 800 is fitted onto the terminal post 500 and clamped between the end cap 200 and the terminal post 500. There are two sealing rings 800; each sealing ring 800 is fitted onto one terminal post 500 and clamped between the end cap 200 and the terminal post 500. One sealing ring 800 serves as the positive electrode sealing ring, fitted onto the positive terminal post and clamped between the end cap 200 and the positive terminal post. The other sealing ring 800 serves as the negative electrode sealing ring, fitted onto the negative terminal post and clamped between the end cap 200 and the negative terminal post.

[0081] Please see Figures 5 to 7 , Figure 5 yes Figure 2 The diagram shows a cross-sectional view of the end cap assembly 3000 taken along point BB. Figure 6 yes Figure 2 The diagram shows a cross-sectional view of the end cap assembly 3000 taken along point CC. Figure 7 yes Figure 3 An exploded view of the lower insulating component 100 in the end cap assembly 3000 shown.

[0082] The lower insulation assembly 100 includes a lower insulation member 110 and a support block 150. The support block 150 is mounted on the lower insulation member 110. The lower insulation member 110 has a first surface 111, a second surface 112, and a peripheral surface 113. Along the thickness direction of the lower insulation member 110, the second surface 112 and the first surface 111 are disposed opposite to each other. The peripheral surface 113 connects between the first surface 111 and the second surface 112.

[0083] Please refer to the following: Figures 8 to 10 , Figure 8 yes Figure 7 The diagram shows the structure of the lower insulating member 110 in the lower insulating assembly 100. Figure 9 yes Figure 8 The diagram shows the structure of the lower insulating component 110 at another angle; Figure 10 yes Figure 3 The diagram shows a cross-section of the lower insulating member 110 along DD in the lower insulating assembly 100 shown.

[0084] The lower insulating member 110 is provided with a boss 120. The boss 120 is located on the second surface 112 and is used to abut against the battery cell assembly. The boss 120 protrudes from the second surface 112 in a direction away from the first surface 111. The boss 120 has a first circumferential surface 125 and a third surface b. Along the width direction of the lower insulating member 110, the first circumferential surface 125 is located on one side of the boss 120. The third surface b is connected to the first circumferential surface 125. The third surface b includes a boss surface 121, a second circumferential surface 123, a third circumferential surface 124, and a fourth circumferential surface 126. The boss surface 121, the second circumferential surface 123, and the third circumferential surface 124 are all connected to the first circumferential surface 125. The boss surface 121 is located on the side of the second surface 112 away from the first surface 111 and abuts against the battery cell assembly. Along the length of the lower insulating member 110, the second circumferential surface 123 is located on one side of the boss 120 and connects between the boss surface 121 and the second surface 112. Along the length of the lower insulating member 110, the third circumferential surface 124 is disposed opposite to the second circumferential surface 123 and connects between the boss surface 121 and the second surface 112. The third circumferential surface 124 and the second circumferential surface 123 are respectively connected to opposite ends of the boss surface 121. Along the width of the lower insulating member 110, the fourth circumferential surface 126 is disposed opposite to the first circumferential surface 125 and connects between the boss surface 121 and the second surface 112, and also connects between the second circumferential surface 123 and the third circumferential surface 124.

[0085] In this embodiment, there are two bosses 120. Along the length of the lower insulating member 110, both bosses 120 are located at the middle of the lower insulating member 110. Along the width of the lower insulating member 110, the two bosses 120 are located at opposite ends of the lower insulating member 110 and are spaced apart. For example, the bosses 120 are square.

[0086] By setting the boss 120 to limit the battery cell assembly, the battery cell assembly can be fixed, avoiding the situation where the electrode tabs are torn or the core becomes loose due to the shaking of the battery cell assembly. This reduces the impact of the battery cell assembly moving along the thickness direction of the lower insulation component 110 inside the energy storage device 1000, improves the stability of the internal structure of the energy storage device 1000, and enhances the safety performance and reliability of the energy storage device 1000.

[0087] The lower insulating member 110 also includes a vent 130, a first pole hole 135, a groove 140, an outlet 40, and an inlet a. Both the vent 130 and the first pole hole 135 penetrate the lower insulating member 110 along its thickness direction. Along the length of the lower insulating member 110, the vent 130 is located at its center. Along the width of the lower insulating member 110, the vent 130 is located on one side of the boss 120 and is opposite to the first circumferential surface 125 of the boss 120. The vent 130 is located between two bosses 120 and is opposite to the first circumferential surfaces 125 of the two bosses 120. For example, the vent 130 is rectangular.

[0088] Along the length of the lower insulating member 110, a first pole hole 135 is located on one side of a vent hole 130 and is spaced apart from the vent hole 130. There are two first pole holes 135, located on opposite sides of the vent hole 130. Along the width of the lower insulating member 110, a groove 140 is located on one side of the vent hole 130 and corresponds to a boss 120. It should be noted that the groove 140 corresponding to the boss 120 means that the projection of the groove 140 onto the boss 120 covers at least a portion of the boss 120. There are two grooves 140, located on opposite sides of the vent hole 130 and corresponding to two bosses 120 respectively. For example, the groove 140 is square. Specifically, the opening of the groove 140 is located on the first surface 111. The groove 140 is recessed from the first surface 111 towards the boss 120. The groove 140 has a first groove sidewall 144 and a first groove wall c. The first groove sidewall 144 is located on the side of the groove 140 facing the vent 130 and is disposed opposite to the first circumferential surface 125.

[0089] The first groove wall surface c is connected to the first groove side wall surface 144 and is disposed opposite to the third surface b. The first groove wall surface c includes a groove bottom wall surface 141, a second groove side wall surface 142, a third groove side wall surface 143, and a fourth groove side wall surface 145. The groove bottom wall surface 141 is disposed opposite to the opening of the groove 140, connected to the first groove side wall surface 144, and connected between the second groove side wall surface 142 and the third groove side wall surface 143. The groove bottom wall surface 141 is disposed opposite to the boss surface 121. Along the length direction of the lower insulating member 110, the second groove side wall surface 142 is located on one side of the groove 140, is disposed opposite to the second peripheral surface 123, and is connected to the first groove side wall surface 144 and the groove bottom wall surface 141. Along the length of the lower insulating member 110, the third groove side wall 143 is disposed opposite to the second groove side wall 142 and opposite to the third peripheral surface 124, and is connected to the first groove side wall 144 and the groove bottom wall 141.

[0090] Along the opening of the groove 140 towards the bottom wall 141, the distance between the third groove side wall 143 and the second groove side wall 142 gradually decreases, so that both the third groove side wall 143 and the second groove side wall 142 have a guiding function to guide the support block 150 to be installed in the groove 140. The angle between the second groove side wall 142 and the thickness direction of the lower insulating member 110 is greater than or equal to 0 degrees and less than or equal to 10 degrees, and the angle between the third groove side wall 143 and the thickness direction of the lower insulating member 110 is greater than or equal to 0 degrees and less than or equal to 10 degrees, ensuring that the third groove side wall 143 and the second groove side wall 142 have a good guiding function, better guiding the support block 150 to be installed in the groove 140.

[0091] In some other embodiments, only the angle between the second groove sidewall 142 and the thickness direction of the lower insulating member 110 may be greater than or equal to 0 degrees and less than or equal to 10 degrees, or only the angle between the third groove sidewall 143 and the thickness direction of the lower insulating member 110 may be greater than or equal to 0 degrees and less than or equal to 10 degrees. This application does not impose any restrictions on this.

[0092] Along the width direction of the lower insulating member 110, the fourth groove sidewall 145 is disposed opposite to the first groove sidewall 144 and connected to the groove bottom wall 141, and connected between the second groove sidewall 142 and the third groove sidewall 143. The fourth groove sidewall 145 is disposed opposite to the fourth peripheral surface 126.

[0093] The vent 40 penetrates the first circumferential surface 125 and the first groove sidewall 144, and also penetrates the first surface 111, communicating with both the groove 140 and the vent 130. The vent 40 includes two sub-holes (not shown), spaced apart along the length of the lower insulating member 110. For example, the sub-holes are elongated.

[0094] The air inlet a penetrates the third surface b and the first groove wall c, communicates with the groove 140, and is spaced apart from the air outlet 40. Specifically, the air inlet a includes a first air inlet 20, a second air inlet 25, and a third air inlet 10. The first air inlet 20 penetrates the second groove side wall 142 and the second peripheral surface 123, and penetrates the groove bottom wall 141 and the boss surface 121, and communicates with the groove 140. It should be noted that the first air inlet 20 penetrating the groove bottom wall 141 and the boss surface 121 can increase the hole area of ​​the first air inlet 20, further expanding the exhaust channel, which is beneficial to the rapid exhaust of the energy storage device 1000. In some other embodiments, the first air inlet 20 may not penetrate the groove bottom wall 141 and the boss surface 121. This application does not limit this. For example, the first air inlet 20 may be a square hole.

[0095] The second air inlet 25 penetrates the third groove sidewall 143 and the third peripheral surface 124, and also penetrates the groove bottom wall 141 and the boss surface 121, communicating with the groove 140. It should be noted that the second air inlet 25 penetrating the groove bottom wall 141 and the boss surface 121 increases the hole area of ​​the second air inlet 25, further expanding the exhaust channel and facilitating rapid exhaust of the energy storage device 1000. In some other embodiments, the second air inlet 25 may not penetrate the groove bottom wall 141 and the boss surface 121. For example, the second air inlet 25 may be a square hole.

[0096] The third air inlet 10 penetrates the bottom wall surface 141 of the groove and the surface 121 of the boss, and communicates with the groove 140. Exemplarily, the third air inlet 10 is a semi-circular hole. In some other embodiments, the air inlet a may include only one or two of the first air inlet 20, the second air inlet 25, and the third air inlet 10; this application does not impose any limitations on this.

[0097] Please continue reading. Figure 6 , Figure 7 , Figure 11 and Figure 12 , Figure 11 yes Figure 3 The diagram shows a cross-section of the lower insulating component 100 along point DD. Figure 12 yes Figure 3 The diagram shows the structure of the support block 150 in the lower insulation component 100.

[0098] The support block 150 is installed in the groove 140 of the lower insulating member 110. The groove 140 restricts the movement of the support block 150 relative to the lower insulating member 110, which not only improves the assembly stability between the support block 150 and the lower insulating member 110, but also improves the structural stability of the lower insulating assembly 100, so that the boss 120 of the lower insulating member 110 can better press against the cell assembly, thereby improving the safety performance of the energy storage device 1000.

[0099] In this embodiment, there are two support blocks 150. Each support block 150 is installed in a groove 140, which can better ensure the structural stability of the lower insulation component 100, so that the protrusion 120 of the lower insulation component 110 can better press against the cell assembly, thereby improving the safety performance of the energy storage device 1000. For example, the support block 150 is square.

[0100] Each support block 150 has a first side surface 155, a fourth surface d, and a sixth side surface 151. Along the width direction of the lower insulating member 110, the first side surface 155 is located on one side of the support block 150 and is disposed opposite to the first groove sidewall 144. The fourth surface d is connected to the first side surface 155 and is disposed opposite to the first groove wall c. The first side surface 155 includes a first chamfered surface 1, a second chamfered surface 2, and a first connecting surface 155a. The first connecting surface 155a connects between the first chamfered surface 1 and the second chamfered surface 2. For example, both the first chamfered surface 1 and the second chamfered surface 2 are arc-shaped curved surfaces. It should be noted that during the assembly of the support block 150 and the lower insulating member 110, the arrangement of the first chamfered surface 1 and the second chamfered surface 2 can effectively prevent the support block 150 from rubbing against the groove wall of the groove 140, thereby preventing structural damage to the support block 150 and the lower insulating member 110 and improving the overall structural strength of the lower insulating assembly 100. In some other embodiments, the first side surface 155 may not include the chamfered surface, and this application does not limit this.

[0101] The fourth surface d includes a fourth side surface 152, a second side surface 153, a third side surface 154, and a fifth side surface 156. Along the thickness direction of the lower insulating member 110, the fourth side surface 152 is located on one side of the support block 150, opposite to the bottom wall surface 141 of the groove, and connected to the first side surface 155, and also connected between the second side surface 153 and the third side surface 154. Along the length direction of the lower insulating assembly 100, the second side surface 153 is located on one side of the support block 150, connected to the first side surface 155, and opposite to and spaced apart from the second groove side wall surface 142. Specifically, the second side surface 153 is connected to the first chamfered surface 1 of the first side surface 155. It should be noted that the spaced arrangement of the second side surface 153 and the second groove side wall surface 142 allows for an exhaust channel between the support block 150 and the second groove side wall surface 142, facilitating airflow and improving the exhaust performance of the energy storage device 1000.

[0102] The third side surface 154 is connected to both the first side surface 155 and is positioned opposite to the second side surface 153, and is spaced apart from and opposite to the third groove side wall surface 143. Specifically, the third side surface 154 is connected to the second chamfered surface 2 of the first side surface 155. It should be noted that the spaced arrangement of the third side surface 154 and the third groove side wall surface 143 allows for an exhaust channel between the support block 150 and the third groove side wall surface 143, facilitating airflow and improving the exhaust performance of the energy storage device 1000. Furthermore, along the thickness direction of the lower insulating component 100, the minimum distance between the second groove side wall surface 142 and the third groove side wall surface 143 is slightly greater than the distance between the second side surface 153 and the third side surface 154. The second groove side wall surface 142 and the third groove side wall surface 143 can restrict the movement of the support block 150 along the length direction of the lower insulating component 110, improving the assembly stability of the support block 150 and the lower insulating component 110.

[0103] Along the width direction of the lower insulating assembly 100, the fifth side surface 156 is disposed opposite to the first side surface 155, connected to the fourth side surface 152, and connected between the second side surface 153 and the third side surface 154. The fifth side surface 156 includes a third chamfered surface 3, a fourth chamfered surface 4, and a second connecting surface 156a. The third chamfered surface 3 is connected to the second side surface 153. The fourth chamfered surface 4 is connected to the third side surface 154. For example, both the fourth chamfered surface 4 and the third chamfered surface 3 are arc-shaped curved surfaces. It should be noted that during the assembly of the support block 150 and the lower insulating component 110, the arrangement of the third chamfered surface 3 and the fourth chamfered surface 4 can effectively prevent the support block 150 from rubbing against the groove wall of the groove 140, thereby preventing structural damage to the support block 150 and the lower insulating component 110 and improving the overall structural strength of the lower insulating assembly 100. The second connecting surface 156a is connected between the third chamfered surface 3 and the fourth chamfered surface 4. In some other embodiments, the fifth side surface 156 may not include a chamfered surface, and this application does not impose any restrictions on this.

[0104] The sixth side surface 151 faces the same direction as the first surface 111. Along the thickness direction of the lower insulating assembly 100, the sixth side surface 151 is positioned opposite to the fourth side surface 152 and connects between the first side surface 155 and the fifth side surface 156, and between the second side surface 153 and the third side surface 154. Specifically, the sixth side surface 151 is located on the side of the first surface 111 facing the second surface 112 and is opposite to the opening of the groove 140. That is, the sixth side surface 151 being located on the side of the first surface 111 facing the second surface 112 ensures that the support block 150 will not protrude relative to the first surface 111, thus ensuring that the support block 150 will not affect the assembly of the lower insulating assembly 100 in the end cap assembly 3000, which is beneficial to improving the assembly stability of the lower insulating assembly 100. In some other embodiments, the sixth side surface 151 may be flush with the first surface 111; this application does not limit this.

[0105] Please refer to the following: Figure 13 and Figure 14 , Figure 13 yes Figure 12 The diagram shows the structure of the support block 150 at another angle. Figure 14 yes Figure 13 The diagram shows the structure of the support block 150 after being cut along EE.

[0106] The support block 150 is also provided with a relief groove 160, a first exhaust channel 11, a second exhaust channel 12, and a third exhaust channel 13. In this embodiment, the length direction of the relief groove 160 is parallel to the length direction of the lower insulating member 110. There are multiple relief grooves 160. These multiple relief grooves 160 include a first relief groove 161 and a second relief groove 162. The opening of the first relief groove 161 is located on the fourth side surface 152. The first relief groove 161 is recessed from the fourth side surface 152 towards the sixth side surface 151 and penetrates through the second side surface 153 and the third side surface 154. The provision of the first relief groove 161 increases the exhaust channels of the support block 150. In the event of thermal runaway of the energy storage device 1000, the internal gas rapidly passes from the groove 140 through the first relief groove 161, and then exits through the gap between the support block 150 and the first groove wall c to below the explosion-proof valve 300, thereby improving the exhaust effect of the energy storage device 1000. There are two first relief grooves 161. Along the width direction of the lower insulating component 100, two first clearance grooves 161 are provided at intervals. One first clearance groove 161 penetrates the first side 155, and the other first clearance groove 161 penetrates the fifth side 156, so as to eliminate the right angle of the support block 150 and avoid the scraping phenomenon when the support block 150 and the lower insulating component 110 are assembled.

[0107] The opening of the second clearance groove 162 is located on the sixth side surface 151. The second clearance groove 162 is recessed from the sixth side surface 151 toward the fourth side surface 152 and extends through the second side surface 153 and the third side surface 154. The arrangement of the second clearance groove 162 can further increase the exhaust channel of the support block 150, which helps to quickly discharge internal gas from the groove 140 through the second clearance groove 162 and then through the gap between the support block 150 and the first groove wall c to below the explosion-proof valve 300 in the event of thermal runaway of the energy storage device 1000, thereby improving the exhaust effect of the energy storage device 1000. There are two second clearance grooves 162. The two second clearance grooves 162 are arranged at intervals along the width direction of the lower insulating component 100. A second clearance groove 162 penetrates the first side 155, and another second clearance groove 162 penetrates the fifth side 156, which can further eliminate the right angle of the support block 150, and avoid the scraping phenomenon when the support block 150 and the lower insulating member 110 are assembled.

[0108] The first exhaust passage 11 penetrates the second side 153 and the first side 155 of the fourth surface d and communicates with the groove 140. Specifically, the first exhaust passage 11 has a first air inlet 11a and a first air outlet 11b. The first air inlet 11a is located on the second side 153 of the fourth surface d and is correspondingly disposed with respect to the first air inlet hole 20. It should be noted that the correspondence between the first air inlet 11a and the first air inlet hole 20 means that the projection of the first air inlet 11a on the lower insulating member 110 will cover at least a portion of the first air inlet hole 20. The first air outlet 11b is located on the first side 155 and is correspondingly disposed with respect to the air outlet hole 40. It should be noted that the correspondence between the first air outlet 11b and the air outlet hole 40 means that the projection of the first air outlet 11b on the lower insulating member 110 will cover at least a portion of the air outlet hole 40.

[0109] The second exhaust channel 12 penetrates the third side 154 and the first side 155 of the fourth surface d and communicates with the groove 140. Specifically, the second exhaust channel 12 has a second air inlet 12a and a second air outlet 12b. The second air inlet 12a is located on the third side 154 of the fourth surface d and is correspondingly disposed with respect to the second air inlet hole 25, and is spaced apart from the first air inlet 11a. It should be noted that the second air inlet 12a correspondingly disposed with respect to the second air inlet hole 25 means that the projection of the second air inlet 12a on the lower insulating member 110 will cover at least part of the second air inlet hole 25. The second air outlet 12b is located on the first side 155 and is correspondingly disposed with respect to the air outlet 40. In this embodiment, the second exhaust channel 12 is connected to the first exhaust channel 11. In some other embodiments, the second exhaust channel 12 and the first exhaust channel 11 may not be connected, and this application does not limit this.

[0110] The third exhaust channel 13 penetrates the fourth side surface 152 and the first side surface 155 of the fourth surface d and communicates with the groove 140. Specifically, the third exhaust channel 13 has a third air inlet 13a and a third air outlet 13b. The third air inlet 13a is located on the fourth side surface 152 of the fourth surface d and is correspondingly arranged with the third air inlet hole 10, and is spaced apart from the first air inlet 11a and the second air inlet 12a. It should be noted that the third air inlet 13a corresponding to the third air inlet hole 10 means that the projection of the third air inlet 13a on the lower insulating member 110 will cover at least part of the third air inlet hole 10. The third air outlet 13b is located on the first side surface 155 and is correspondingly arranged with the air outlet 40. In this embodiment, the third exhaust channel 13 communicates with the first exhaust channel 11 and the second exhaust channel 12. The third air outlet 13b, the second air outlet 12b, and the first air outlet 11b overlap to ensure that, given the limited area of ​​the first side surface 155 of the support block 150, the third air outlet 13b, the second air outlet 12b, and the first air outlet 11b can all be well-corresponding to the air outlet 40, which is beneficial for the exhaust of the energy storage device 1000. In some other embodiments, the second exhaust channel 12 and the first exhaust channel 11 may not be connected, and the third air outlet 13b, the second air outlet 12b, and the first air outlet 11b may be arranged alternately; this application does not impose any restrictions on this.

[0111] Please refer to the following: Figure 15 and Figure 16 , Figure 15 yes Figure 3 The diagram shows the gas flow path in the lower insulation component 100. Figure 16 yes Figure 5 The diagram shows the gas flow path in the end cap assembly 3000, where the solid lines with arrows represent the gas flow path.

[0112] When the energy storage device 1000 experiences thermal runaway, some of the internal gas can flow into the first air inlet 11a from the first air inlet 20, then flow out from the first air outlet 11b through the first exhaust channel 11, enter the air outlet 40, then flow into the vent 130, and reach below the explosion-proof valve 300. Some of the internal gas can flow into the second air inlet 12a from the second air inlet 25, then flow out from the second air outlet 12b through the second exhaust channel 12, enter the air outlet 40, then flow into the vent 130, and reach below the explosion-proof valve 300. Some of the internal gas can flow into the third air inlet 13a from the third air inlet 10, then flow out from the third air outlet 13b through the third exhaust channel 13, enter the air outlet 40, then flow into the vent 130, and reach below the explosion-proof valve 300. The arrangement of the first exhaust channel 11, the second exhaust channel 12, the third exhaust channel 13, the first air inlet 20, the second air inlet 25, and the third air inlet 10 facilitates the rapid discharge of gas from multiple directions to the explosion-proof valve 300, and also facilitates the timely opening of the explosion-proof valve 300 to release pressure, thereby improving the exhaust performance and safety performance of the energy storage device 1000.

[0113] In this embodiment, the support block 150 is made of a high-temperature resistant material to ensure that even if the lower insulating component 110 melts during thermal runaway of the energy storage device 1000, the support block 150 will not deform and can still support the end cap 200 and the battery cell assembly. The melting point of the high-temperature resistant material is higher than the temperature at which the energy storage device 1000 experiences thermal runaway, ensuring the structural stability of the support block 150. This prevents the support block 150 from melting under high-temperature conditions and ensures it continues to support the end cap 200 and the battery cell assembly, thereby guaranteeing good venting performance of the energy storage device 1000 and improving its safety performance. Generally, the temperature at which the energy storage device 1000 experiences thermal runaway is around 500 degrees Celsius. For example, the melting point of the support block 150 is greater than or equal to 600 degrees Celsius, and the support block 150 can be made of ceramic, mica, or metal materials.

[0114] Please continue reading. Figure 3 and Figure 4 The end cap 200 can be a smooth aluminum sheet made of aluminum. The end cap 200 is located on the side of the first surface 111 opposite to the second surface 112. The end cap 200 has an explosion-proof hole 210 and a second pole hole 220. Both the explosion-proof hole 210 and the second pole hole 220 penetrate the end cap 200 along its thickness direction. Along the length of the end cap 200, the explosion-proof hole 210 is located in the middle of the end cap 200 and is opposite to the vent hole 130. It should be noted that the explosion-proof hole 210 being opposite to the vent hole 130 means that the orthogonal projection of the explosion-proof hole 210 on the lower insulating assembly 100 covers at least a portion of the vent hole 130.

[0115] The second electrode post hole 220 is spaced apart from the explosion-proof hole 210 and communicates with the first electrode post hole 135 to allow the electrode post 500 to pass through. There are two second electrode post holes 220. Along the length of the end cap 200, the two second electrode post holes 220 are located on opposite sides of the explosion-proof hole 210 and communicate with the two first electrode post holes 135 respectively. Specifically, one second electrode post hole 220 communicates with one first electrode post hole 135 for the positive electrode post to pass through. The other second electrode post hole 220 communicates with the other first electrode post hole 135 for the negative electrode post to pass through.

[0116] The explosion-proof valve 300 covers the explosion-proof port 210 located away from the opening of the lower insulation component 100. The explosion-proof valve 300 has an opening area 310 and a fixing area 320. The opening area 310 is located in the middle of the explosion-proof valve 300 and is correspondingly arranged with the vent 130. The projection of the vent 130 on the explosion-proof valve 300 covers the opening area 310. It should be noted that in the event of thermal runaway of the energy storage device 1000, the explosion-proof valve 300 will open, and the internal air pressure will blow a portion of the lower insulation component 110 corresponding to the explosion-proof valve 300 out of the energy storage device 1000. The blown-out portion of the lower insulation component 110 comes into contact with air and burns under the action of high temperature and oxygen, causing the energy storage device 1000 to catch fire and explode. The projection of the vent 130 onto the explosion-proof valve 300, covering the valve opening area 310, reduces the size of the lower insulating component 110 corresponding to the explosion-proof valve 300. This ensures that, in the event of thermal runaway of the energy storage device 1000, when the explosion-proof valve 300 opens, no lower insulating component 110 will be ejected by the internal gas pressure of the energy storage device 1000, thereby preventing the energy storage device 1000 from catching fire or exploding and improving its safety performance. The fixing area 320 surrounds and connects to the valve opening area 310 and is used for fixed connection with the end cap 200. In some other embodiments, the projection of the vent 130 onto the explosion-proof valve 300 may also cover part of the fixing area 320; this application does not limit this.

[0117] The protective plate 450 covers the opening of the explosion-proof hole 210 near the lower insulating assembly 100 and protects the explosion-proof valve 300. Each upper insulating member 700 passes through a second pole hole 220 and has a third pole hole 710. The third pole hole 710 penetrates the upper insulating member 700 along its thickness direction and communicates with a second pole hole 220. Each pressure block 600 has a fourth pole hole 610. The fourth pole hole 610 penetrates the pressure block 600 along its thickness direction and communicates with the third pole hole 710. Along the thickness direction of the end cap assembly 3000, each pole 500 passes through a first pole hole 135, a second pole hole 220, a third pole hole 710, and a fourth pole hole 610, and is fixedly connected to a pressure block 600. Each sealing ring 800 is fitted onto a pole post 500 and passes through a second pole post hole 220 and a first pole post hole 135. It is clamped between the hole wall of the second pole post hole 220 and the circumferential surface of a pole post 500. This not only seals the gap between the end cap 200 and the pole post 500, ensuring good airtightness of the end cap assembly 3000, but also insulates the end cap 200 and the pole post 500, preventing short circuits between them.

[0118] The energy storage device 1000 provided in this embodiment, by providing a first exhaust channel 11, a second exhaust channel 12, and a third exhaust channel 13 on the support block 150, and an exhaust port 40 and an intake port a on the boss 120, allows the gas inside the energy storage device 1000 to enter from the intake port a in multiple directions, and to flow quickly from the first exhaust channel 11, the second exhaust channel 12, and the third exhaust channel 13 to the exhaust port 40, then into the vent 130, and finally to the area below the explosion-proof valve 300, and then discharged when the explosion-proof valve 300 is opened. This facilitates the rapid discharge of gas inside the energy storage device 1000, improving the exhaust performance and safety performance of the energy storage device 1000.

[0119] This application also provides an electrical device, such as an energy storage cabinet or a new energy vehicle. This electrical device includes the energy storage device 1000 described in the above embodiments, which supplies power to the electrical device. Since the specific structure and technical effects of the energy storage device 1000 have already been described in detail above, they will not be repeated here. The electrical device provided in this embodiment, by incorporating the aforementioned energy storage device 1000, improves the exhaust performance and operational safety and reliability of the electrical device.

[0120] The above descriptions are merely optional embodiments of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of this application and are not intended to limit the patent scope of this application. At the same time, for those skilled in the art, equivalent structural transformations made based on the concept of this application using the specification and drawings of this application, or direct / indirect applications in other related technical fields, are all included within the patent protection scope of this application.

Claims

1. A lower insulation component for use in an energy storage device, characterized in that, It includes a lower insulating member and a support block. The lower insulating member has a first surface and a second surface, and the first surface and the second surface are disposed opposite to each other along the thickness direction of the lower insulating member. The lower insulating member is provided with a boss, which is provided on the second surface and is used to abut against the battery cell assembly in the energy storage device. The boss has a first peripheral surface and a third surface, and the third surface is connected to the first peripheral surface. The lower insulating component is further provided with a vent hole, a groove, an outlet hole, and a first inlet hole. The vent hole penetrates the first surface and the second surface, and is located on one side of the boss and is opposite to the first circumferential surface. The opening of the groove is located on the first surface. The groove is corresponding to the boss. The groove has a first groove sidewall and a first groove wall. The first groove sidewall is located on the side of the groove facing the vent hole and is opposite to the first circumferential surface. The first groove wall is connected to the first groove sidewall and is opposite to the third surface. The outlet hole penetrates the first circumferential surface and the first groove sidewall and communicates with the groove and the vent hole. The first inlet hole penetrates the third surface and the first groove wall and communicates with the groove. The support block is installed in the groove. The support block has a first side surface and a fourth surface. The first side surface is disposed opposite to the side wall of the first groove. The fourth surface is connected to the first side surface and is disposed opposite to the side wall of the first groove. The support block is provided with a first exhaust channel. The first exhaust channel has a first air inlet and a first air outlet. The first air inlet is located on the fourth surface and is disposed corresponding to the first air inlet hole. The first air outlet is located on the first side surface and is disposed corresponding to the air outlet hole.

2. The lower insulation component according to claim 1, characterized in that, The lower insulating component is also provided with a second air inlet, which penetrates the third surface and the first groove wall and communicates with the groove, and is spaced apart from the first air inlet. The support block is provided with a second exhaust channel, which has a second air inlet and a second air outlet. The second air inlet is located on the fourth surface and is corresponding to the second air inlet hole, and is spaced apart from the first air inlet. The second air outlet is located on the first side and is corresponding to the air outlet hole.

3. The lower insulation component according to claim 2, characterized in that, The lower insulating component is also provided with a third air inlet hole, which penetrates the third surface and the first groove wall surface, communicates with the groove, and is spaced apart from the first air inlet hole and the second air inlet hole; The support block is also provided with a third exhaust channel, which has a third air inlet and a third air outlet. The third air inlet is located on the fourth surface and is corresponding to the third air inlet hole, and is spaced apart from the first air inlet and the second air inlet. The third air outlet is located on the first side and is corresponding to the air outlet hole.

4. The lower insulation component according to claim 3, characterized in that, The third surface includes a second circumferential surface, a third circumferential surface, and a boss surface. Along the length of the lower insulating member, the second circumferential surface and the third circumferential surface are arranged opposite to each other and are both connected to the first circumferential surface. The boss surface is located on the side of the second surface away from the first surface, and is connected between the second circumferential surface and the third circumferential surface, and is also connected to the first circumferential surface. It is also used to abut against the battery cell assembly. The first groove wall includes a second groove side wall, a third groove side wall, and a groove bottom wall. Along the length of the lower insulating member, the second groove side wall and the third groove side wall are arranged opposite to each other and are both connected to the first groove side wall. The second groove side wall is arranged opposite to the second circumferential surface, and the third groove side wall is arranged opposite to the third circumferential surface. The groove bottom wall is arranged opposite to the opening of the groove and opposite to the surface of the boss, and is connected between the second groove side wall and the third groove side wall, and is also connected to the first groove side wall. The first air inlet penetrates the side wall of the second groove and the second peripheral surface; the second air inlet penetrates the side wall of the third groove and the third peripheral surface; and the third air inlet penetrates the bottom wall of the groove and the surface of the boss. The fourth surface also includes a second side, a third side, and a fourth side. Along the length of the lower insulating component, the second side and the third side are arranged opposite to each other and are both connected to the first side. The second side is arranged opposite to the side wall of the second groove, the third side is arranged opposite to the side wall of the third groove, and the fourth side is connected between the second side and the third side, and is arranged opposite to the bottom wall of the groove and connected to the first side. The first air inlet is located on the second side, the second air inlet is located on the third side, and the third air inlet is located on the fourth side.

5. The lower insulation assembly according to claim 4, characterized in that, The first air inlet also penetrates the bottom wall of the groove and the surface of the boss, and / or the second air inlet also penetrates the bottom wall of the groove and the surface of the boss.

6. The lower insulation component according to any one of claims 3 to 5, characterized in that, The first air outlet, the second air outlet, and the third air outlet overlap.

7. The lower insulation assembly according to claim 4, characterized in that, The second side is spaced apart from the second groove sidewall, and the third side is spaced apart from the third groove sidewall.

8. The lower insulation component according to claim 7, characterized in that, The support block is also provided with a first clearance groove, the opening of the first clearance groove is located on the fourth side, and the first clearance groove passes through the second side and the third side.

9. The lower insulation component according to claim 8, characterized in that, The fourth surface further includes a fifth side surface, which is disposed opposite to the first side surface and connected to the fourth side surface, and is connected between the second side surface and the third side surface; There are two first clearance slots. Along the width direction of the lower insulating component, the two first clearance slots are spaced apart. One first clearance slot penetrates the first side surface, and the other first clearance slot penetrates the fifth side surface.

10. The lower insulation assembly according to claim 7, characterized in that, The support block also has a sixth side surface, which faces the same direction as the first surface, is connected to the first side surface, and is connected between the second side surface and the third side surface; The support block is also provided with a second clearance groove, the opening of which is located on the sixth side surface, and the second clearance groove extends through the second side surface and the third side surface.

11. The lower insulation assembly according to claim 10, characterized in that, The fourth surface also includes a fifth side surface, which is disposed opposite to the first side surface and connected to the sixth side surface, and is connected between the second side surface and the third side surface; There are two second clearance slots, which are spaced apart. One second clearance slot passes through the first side and the other second clearance slot passes through the fifth side.

12. The lower insulation assembly according to any one of claims 7 to 11, characterized in that, Along the direction from the opening of the groove towards the bottom wall of the groove, the distance between the second groove sidewall and the third groove sidewall gradually decreases.

13. The lower insulation assembly according to claim 12, characterized in that, The angle between the second groove sidewall and the thickness direction of the lower insulating member is greater than or equal to 0 degrees and less than or equal to 10 degrees, and / or the angle between the third groove sidewall and the thickness direction of the lower insulating member is greater than or equal to 0 degrees and less than or equal to 10 degrees.

14. The lower insulation assembly according to any one of claims 7 to 11, characterized in that, The first side surface includes a first chamfered surface, a second chamfered surface, and a first connecting surface. The first chamfered surface is connected to the second side surface, the second chamfered surface is connected to the third side surface, and the first connecting surface is connected between the first chamfered surface and the second chamfered surface.

15. The lower insulation assembly according to any one of claims 7 to 11, characterized in that, The fourth surface further includes a fifth side surface, which is disposed opposite to the first side surface and connected between the second side surface and the third side surface. The fifth side surface includes a third chamfered surface, a fourth chamfered surface, and a second connecting surface. The third chamfered surface is connected to the second side surface, the fourth chamfered surface is connected to the third side surface, and the second connecting surface is connected between the third chamfered surface and the fourth chamfered surface.

16. The lower insulation assembly according to claim 1, characterized in that, The support block also has a sixth side surface, which faces the same direction as the first surface and is located on the side of the first surface closer to the second surface, or the sixth side surface is flush with the first surface.

17. The lower insulation assembly according to claim 1, characterized in that, There are two bosses, which are located on opposite sides of the vent hole along the width direction of the lower insulating member. There are two grooves, and each groove is provided in correspondence with one of the bosses; There are two support blocks, and each support block is installed in one of the grooves.

18. An end cap assembly, characterized in that, Includes the lower insulation component, end cap, and explosion-proof valve as described in any one of claims 1 to 16, wherein the end cap is located on the side of the first surface opposite to the second surface, and the end cap is provided with an explosion-proof hole, the explosion-proof hole being disposed opposite to the vent hole; The explosion-proof valve is installed on the end cap and covers the explosion-proof hole.

19. The end cap assembly according to claim 18, characterized in that, The projection of the vent hole on the explosion-proof valve covers the opening area of ​​the explosion-proof valve.

20. An energy storage device, characterized in that, The energy storage device includes a housing, a cell assembly, and an end cap assembly as described in claim 18 or 19. The housing has a receiving cavity and an opening. The receiving cavity is located inside the housing and contains an electrolyte. The opening is located on the top side of the receiving cavity and communicates with the receiving cavity. The cell assembly is housed in the receiving cavity. The end cap assembly is mounted on the housing, closes the opening, and is electrically connected to the cell assembly. The boss abuts against the cell assembly.

21. An electrical appliance, characterized in that, Includes the energy storage device as described in claim 20, wherein the energy storage device is used to supply power to the electrical equipment.

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