Battery, battery pack, energy storage device and energy storage system

Abstract

This application relates to a battery, a battery pack, an energy storage device, and an energy storage system. The battery includes: a housing and a top cover assembly, the housing and the top cover assembly together enclosing a receiving cavity, the top cover assembly including an explosion-proof valve; an electrode assembly, the electrode assembly being housed within the receiving cavity; and a limiting assembly, the limiting assembly including a pressing member and a supporting member, the pressing member being connected to the top cover assembly and located between the top cover assembly and the electrode assembly, and the supporting member being connected to the inner wall of the housing; wherein, when the top cover assembly and the pressing member are installed relative to the housing, at least a portion of the structure of the supporting member can be positioned between the pressing member and the top cover assembly. By providing the pressing member and the supporting member, at least a portion of the structure of the supporting member, when the top cover assembly and the pressing member are installed relative to the housing, is positioned between the pressing member and the top cover assembly, which can better support the electrode assembly in the event of thermal runaway, prevent the explosion-proof valve from being blocked, and improve battery safety.

Description

Technical Field

[0001] This application relates to the field of batteries, and more particularly to a battery, a battery pack, an energy storage device, and an energy storage system. Background Technology

[0002] In traditional battery structures, the top cover assembly is welded to the casing, encapsulating the electrode assembly inside the casing. Typically, during thermal runaway, the internal temperature rises, increasing gas production, and the explosion-proof valve automatically opens to release gas. However, the lower plastic layer in the top cover assembly melts during thermal runaway, causing the electrode assembly to lose its support to the top cover. During thermal runaway, the electrode assembly generates a large amount of gas, pushing it towards the explosion-proof valve. This blocks the gas passage located at the top of the electrode assembly, connecting to the valve's vent, resulting in poor venting. The resulting surge in internal pressure can lead to cracks on the casing sides and at the welds between the casing and the top cover, compromising battery safety. Utility Model Content

[0003] The purpose of this application is to provide a battery, battery pack, energy storage device, and energy storage system that can better support the electrode assembly in the event of thermal runaway, prevent the explosion-proof valve from clogging, and improve the safety of the battery.

[0004] To achieve the above objectives, in a first aspect, this application provides a battery comprising: The housing and the top cover assembly together enclose a receiving cavity, and the top cover assembly includes an explosion-proof valve; Electrode assembly, the electrode assembly being housed within a receiving cavity; and The limiting assembly includes a pressing member and a supporting member. The pressing member is connected to the top cover assembly and is located between the top cover assembly and the electrode assembly. The supporting member is connected to the inner wall of the housing. When the top cover assembly and the press-fit member are installed relative to the housing, at least a portion of the structure of the support member can move towards the inner wall of the housing under the pressure of the press-fit member to avoid it. When the top cover assembly and the press-fit member are installed in place relative to the housing, at least a portion of the structure of the support member can be positioned between the press-fit member and the top cover assembly.

[0005] As an alternative implementation, the support is cantilevered, with one end connected to the inner wall of the housing and the other end suspended in the air.

[0006] As an optional implementation, the support member includes a fixing part and a stop part that are connected to each other; The fixing part is connected to the inner wall of the housing; The stop portion is tilted away from the inner wall of the housing so that it can elastically deform towards the inner wall of the housing under the pressure of the presser when the top cover assembly and the presser are installed relative to the housing, or elastically return to the position away from the inner wall of the housing when the top cover assembly and the presser are installed relative to the housing, and extend between the top cover assembly and the presser.

[0007] As an alternative implementation, a portion of the stop portion away from the inner wall surface of the housing is formed as a guide slope. The guide slope is used to press against the press-fit member when the top cover assembly and the press-fit member are installed relative to the housing, and to guide the installation of the press-fit member relative to the housing.

[0008] As an optional implementation, the surface of the fixing part away from the inner wall of the housing is defined as the first surface, and the included angle Q between the first surface and the guide slope satisfies: 120°≤Q≤175°.

[0009] As an alternative implementation, the tail of the stop portion is flipped toward the inner wall of the housing so that the stop portion is formed into a hook shape with the tail tucked inward.

[0010] As an optional implementation, a first direction, a second direction, and a third direction that are perpendicular to each other are defined in the battery. The third direction is the height direction of the battery, and the size of the battery along the second direction is larger than the size of the battery along the first direction. The support member is constructed as a thin-walled structure; the width dimension along the first direction of the overlapping portion of the press-fit member and the tail portion projected onto the target plane is defined as G, wherein the target plane is perpendicular to the third direction; The thickness K and width G of the support member satisfy: 0.15mm ≤ G ≤ 5K; and / or The distance P between the end face of the tail and the inner wall of the housing satisfies the following width dimension G: P ≥ G.

[0011] As an optional implementation, the housing includes a first housing region and a second housing region, which are arranged sequentially along the height direction of the battery; and the inner wall of the first housing region protrudes inward relative to the interior of the second housing region in the direction of housing wall thickness. The fixing part is connected to the first housing area, and the stop part is positioned corresponding to the second housing area and is raised away from the inner wall of the second housing area.

[0012] As an optional implementation, the top cover assembly also includes a top cover and a lower insulating member; The explosion-proof valve is located on the top cover; The lower insulating member is connected to the side of the top cover facing the electrode assembly, and the crimping member is connected to the side of the lower insulating member facing the electrode assembly.

[0013] As an optional implementation, a first direction, a second direction, and a third direction that are perpendicular to each other are defined in the battery. The third direction is the height direction of the battery, and the size of the battery along the second direction is larger than the size of the battery along the first direction. The crimping member extends along the first direction, and each crimping member is provided with two supporting members, which are located on both sides of the lower insulating member along the first direction.

[0014] As an alternative implementation, the lower insulating member is recessed at the end near the support member to form a clearance space to accommodate the corresponding support member.

[0015] As an optional implementation, the crimping member includes a main body and at least two vertical wall portions connected to the main body; At least two vertical wall sections are located on the side of the main body facing the top cover assembly, and the vertical wall sections are arranged at intervals.

[0016] As an optional implementation, there are two vertical wall portions, which are located on both sides of the corresponding support member along the second direction, and the two vertical wall portions extend along the first direction.

[0017] As an optional implementation, the angle D between the facing surfaces of the two vertical walls and the surface of the main body facing the top cover assembly both satisfy: 45°≤D≤135°; and / or At least one end of the main body along the first direction is chamfered.

[0018] As an alternative implementation, the surface of the main body facing the top cover assembly is provided with a reinforcing structure.

[0019] As an optional implementation, there are two crimping members, which are respectively disposed at the two ends of the lower insulating member along the second direction.

[0020] As an optional implementation, the lower insulating member includes an insulating member body and a boss, the boss protruding relative to the insulating member body in the direction toward the electrode assembly; The crimping member is connected to the end face of the boss that is away from the main body of the insulating component, and the support member corresponding to the crimping member is located between the crimping member and the main body of the insulating component.

[0021] As an alternative implementation, the crimping member and the electrode assembly are spaced apart along the height direction of the battery.

[0022] Secondly, this application also provides a battery pack including at least one battery as described above.

[0023] Thirdly, this application also provides an energy storage device, including the aforementioned battery pack.

[0024] Secondly, this application also provides an energy storage system, including the aforementioned energy storage device.

[0025] Compared with the prior art, the beneficial effects of this application are: In this application, a limiting component is provided, comprising a pressing member and a supporting member. The pressing member is connected to the top cover assembly and located between the top cover assembly and the electrode assembly. In the event of thermal runaway, the electrode assembly will move towards the top cover assembly and the pressing member, pressing against the pressing member, thus giving the pressing member a tendency to move towards the top cover assembly. Since the supporting member is connected to the inner wall of the housing, when the top cover assembly and the pressing member are installed relative to the housing, at least a portion of the supporting member can be positioned between the pressing member and the top cover assembly. Therefore, the pressing member is blocked by the portion of the supporting member positioned between the pressing member and the top cover assembly, thus also hindering the movement of the electrode assembly. At this time, a channel for gas to pass through the battery can be formed between the electrode assembly, the pressing member, and the top cover assembly, thereby preventing the explosion-proof valve from becoming blocked and improving battery safety.

[0026] Furthermore, when the top cover assembly and the press-fit member are installed relative to the housing, at least a portion of the support member's structure can move towards the inner wall of the housing under the pressure of the press-fit member. This configuration ensures that during the installation of the top cover assembly and the press-fit member relative to the housing, the press-fit member presses at least a portion of the support member's structure, causing it to move towards the inner wall of the housing, thus preventing the support member from affecting the installation of the top cover assembly and the press-fit member, allowing them to be smoothly installed onto the housing. When the top cover assembly and the press-fit member are in place relative to the housing, at least a portion of the support member's structure is positioned between the press-fit member and the top cover assembly, thus acting as a barrier to prevent the top cover assembly and the press-fit member from detaching from the housing. It also serves to pre-position the top cover assembly before welding it to the housing. In other words, the battery of this application can effectively block the support from the press-fitting component and the electrode assembly in the event of thermal runaway, ensure that the top cover assembly and the press-fitting component are not interfered with by the support during installation, and also play a pre-positioning role for the top cover assembly before welding. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the energy storage system provided in the embodiments of this application; Figure 2This is a schematic diagram of another structure of the energy storage system provided in the embodiments of this application; Figure 3 This is a cross-sectional structural diagram of the battery provided in an embodiment of this application; Figure 4 yes Figure 3 Enlarged structural diagram of part A in the middle; Figure 5 This is a cross-sectional view of the battery provided in an embodiment of this application from another angle; Figure 6 yes Figure 5 A magnified structural diagram of part B in the middle section; Figure 7 yes Figure 5 A magnified structural diagram of section C; Figure 8 This is a schematic diagram of the structure of the top cover assembly and the limiting assembly in the battery provided in the embodiments of this application. Figure 9 This is a schematic diagram of the structure of the battery in which the pressure connector and the support component cooperate with each other, provided in an embodiment of this application; Figure 10 This is an exploded structural diagram of the interaction between the pressure connector and the support component in the battery provided in the embodiments of this application.

[0029] Explanation of reference numerals in the attached figures: 100. Battery; 10. Shell; 11. First shell region; 12. Second shell region; 20. Top cover assembly; 21. Top cover; 221. First pole post; 222. Second pole post; 23. Explosion-proof valve; 24. Lower insulating component; 240. Insulating component body; 241. Boss; 30. Limiting components; 40. Press-fit component; 41. Main body; 42. Vertical wall section; 43. Reinforcing structure; 44. Mounting hole; 50. Support component; 51. Fixing part; 511. First surface; 52. Stop part; 521. Guide slope; 522. Tail end; 60. Electrode assembly; Z, receiving cavity; F, first direction; S, second direction; T, third direction; B, clearance space; 400, Energy storage system; 200, Energy storage device; 410, Power conversion device; 411, First user load; 412, Second user load; 420, High-voltage cable; 421, First power conversion device; 422, Second power conversion device. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0031] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0032] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain circumstances to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0034] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0035] 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 based on future application needs. Currently, the main way to generate green electricity is to develop green energy sources such as photovoltaics and wind power to replace fossil fuels.

[0036] 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.

[0037] Taking electrochemical energy storage as an example, an energy storage device can be provided for use in an energy storage system. This energy storage device contains a set of batteries, which mainly use the chemical elements in the batteries as the energy storage medium. The charging and discharging process is accompanied by the chemical reaction or change of the energy storage medium. Simply put, the electrical energy generated by wind and solar energy is stored in the chemical battery. 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.

[0038] 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: (1) Large-scale energy storage power stations applied to wind power and photovoltaic power stations can help renewable energy power generation meet 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.

[0039] (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.

[0040] (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 costs. 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.

[0041] In some embodiments, see Figure 1 , Figure 1 This is a schematic diagram of the energy storage system provided in the embodiments of this application. Figure 1 The embodiments are illustrated using a home energy storage scenario in user-side energy storage as an example. The energy storage device 200 of this application is not limited to the home energy storage scenario.

[0042] This application provides an energy storage system 400, which includes a power conversion device 410 (photovoltaic panel), a first user load 411 (household lighting fixture), a second user load 412 (e.g., household appliances such as air conditioners), and an energy storage device 200. The energy storage device 200 can be a small energy storage box, which can be wall-mounted on an outdoor wall. However, the energy storage device 200 of this application is not limited to wall mounting and can also be placed in a user's residence in other ways. Specifically, the photovoltaic panel can convert solar energy into electrical energy during periods of low electricity prices, and the energy storage device 200 is used to store this electrical energy and supply it to lighting fixtures and household appliances during periods of high electricity prices, or to provide power during power outages / power failures.

[0043] In some embodiments, please refer to Figure 2 , Figure 2 This is a schematic diagram of another structure of the energy storage system provided in an embodiment of this application. Figure 2 The embodiments are illustrated using a shared energy storage scenario on the generation / distribution side as an example. The energy storage device 200 of this application is not limited to its generation / distribution side energy storage scenario.

[0044] The energy storage system 400 provided in this application includes: a high-voltage cable 420, a first power conversion device 421, a second power conversion device 422, and an energy storage device 200 provided in this application. In some embodiments of the power generation scenario, the second power conversion device 422 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 200 through grid connection. The energy storage device 200 is connected to the high-voltage cable 420 and outputs smooth electricity to the power consumption side of the distribution network, realizing peak shaving and frequency regulation, and ensuring stable grid operation. Alternatively, the wind power conversion device is always connected to the high-voltage cable 420. Under normal power generation conditions, the electricity output by the wind power conversion device is supplied to the power consumption side of the distribution network through the high-voltage cable 420. When the current power load is low and the wind power conversion device generates excess electricity, the excess electricity is stored in the energy storage device 200 to reduce wind and solar curtailment rates and improve the problem of new energy power generation consumption. When the electricity load is high, the power grid issues an instruction to transmit the electricity stored in the energy storage device 200 together with the high-voltage cable 420 in grid-connected mode to supply the electricity to the electricity 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.

[0045] In some embodiments on the distribution network side, the first power conversion device 421 can be a photovoltaic power conversion device. The energy storage device 200 is connected to the high-voltage cable 420 and installed downstream of the high-voltage cable 420 between the user load and the high-voltage cable 420. The electrical energy output by the photovoltaic power conversion device is stored in the energy storage device 200, which can act as a backup power source in a timely manner when the power grid / distribution network experiences a fault. Alternatively, it can provide power support to alleviate line congestion when the high-voltage cable 420 transmission line experiences line congestion, and to provide power support during power grid expansion planning to delay the economic pressure caused by power grid / distribution capacity expansion.

[0046] Optionally, the first power conversion device 421 may include, but is not limited to, a wind power conversion device, and the second power conversion device 422 may include, but is not limited to, a photovoltaic power conversion device. The first power conversion device 421 and the second power conversion device 422 can convert at least one of solar energy, light energy, wind energy, thermal energy, tidal energy, biomass energy and mechanical energy into electrical energy.

[0047] Optionally, the energy storage device 200 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.

[0048] Optionally, the energy storage device 200 may include, but is not limited to, individual batteries, or battery modules, battery packs, battery clusters, mobile power supplies, energy storage cabinets / containers, and other battery integrated systems composed of individual batteries. The actual application form of the energy storage device 200 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 200.

[0049] Optionally, when the energy storage device 200 is a single battery, the energy storage device 200 can be, but is not limited to, at least one of cylindrical batteries, square batteries, prismatic batteries or batteries of other shapes.

[0050] Optionally, the battery cell can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application does not specifically limit it.

[0051] In this embodiment, the energy storage device includes a battery pack, and the battery pack includes a battery, as an example for illustration.

[0052] In traditional battery structures, the top cover assembly is welded to the casing, encapsulating the electrode assembly inside the casing. Typically, during thermal runaway, the internal temperature of the battery rises, and the electrode assembly generates a large amount of gas. The explosion-proof valve in the top cover assembly opens to vent the gas from the top of the electrode assembly. The gas pressure at the top of the electrode assembly decreases, and the gas at the bottom of the electrode assembly impacts the bottom of the casing, bypasses the electrode assembly from the side, and eventually exits from the explosion-proof valve at the top of the electrode assembly. Therefore, the electrode assembly has a strong upward tendency to move. However, during thermal runaway, the lower plastic in the top cover assembly melts, causing the electrode assembly to lose its support from the top cover. This pushes the electrode assembly towards the explosion-proof valve, blocking the gas passage at the top of the electrode assembly that connects to the explosion-proof valve's vent. Gas generated inside, at the bottom, and on the sides of the electrode assembly cannot escape from the explosion-proof valve, causing a sharp increase in internal battery pressure. This can lead to problems such as cracking of the casing sides and cracking of the welds between the casing and the top cover, resulting in poor battery safety.

[0053] In view of this, this application provides a battery with a limiting component, which includes a pressing member and a support member. The pressing member is connected to the top cover assembly and located between the top cover assembly and the electrode assembly. In the event of thermal runaway, the electrode assembly will move towards the top cover assembly and the pressing member, pressing against the pressing member, thus giving the pressing member a tendency to move towards the top cover assembly. Since the support member is connected to the inner wall of the housing, when the top cover assembly and the pressing member are installed relative to the housing, at least a portion of the support member can be positioned between the pressing member and the top cover assembly. Therefore, the pressing member is blocked by the portion of the support member positioned between the pressing member and the top cover assembly, thus also blocking the movement of the electrode assembly. This effectively prevents the electrode assembly from continuing to move and blocking the gas passage at the top of the electrode assembly, thereby preventing the explosion-proof valve from becoming blocked and improving battery safety.

[0054] Furthermore, when the top cover assembly and the press-fit member are installed relative to the housing, at least a portion of the support member's structure can move towards the inner wall of the housing under the pressure of the press-fit member. With this configuration, during the installation of the top cover assembly and the press-fit member relative to the housing, the press-fit member presses at least a portion of the support member's structure, causing it to move towards the inner wall of the housing, thus preventing the support member from affecting the installation of the top cover assembly and the press-fit member, allowing the top cover assembly and the press-fit member to be smoothly installed onto the housing.

[0055] The following will describe the scheme of this application in detail with reference to the accompanying drawings.

[0056] Please see Figure 3 and Figure 4 , Figure 3 This is a cross-sectional structural diagram of the battery provided in an embodiment of this application. Figure 4 yes Figure 3 A magnified structural diagram of part A in the middle.

[0057] This application discloses a battery 100, which includes: a housing 10, a top cover assembly 20, an electrode assembly 60, and a limiting assembly 30.

[0058] For ease of explanation, this application defines a first direction F, a second direction S, and a third direction T that are perpendicular to each other in the battery 100. The third direction T is the height direction of the battery 100, and the size of the battery 100 along the second direction S is greater than the size of the battery 100 along the first direction F.

[0059] In this application, the housing 10 and the top cover assembly 20 together enclose a receiving cavity Z, and the top cover assembly 20 includes an explosion-proof valve 23. The electrode assembly 60 is housed within the receiving cavity Z. The limiting assembly 30 includes a pressing member 40 and a support member 50. The pressing member 40 is connected to the top cover assembly 20 and located between the top cover assembly 20 and the electrode assembly 60, and the support member 50 is connected to the inner wall of the housing 10. When the top cover assembly 20 and the pressing member 40 are installed relative to the housing 10, at least a portion of the structure of the support member 50 can move towards the inner wall of the housing 10 under the pressure of the pressing member 40 to avoid obstruction. When the top cover assembly 20 and the pressing member 40 are installed in place relative to the housing 10, at least a portion of the structure of the support member 50 can be positioned between the pressing member 40 and the top cover assembly 20.

[0060] The battery 100 of this application includes a limiting component 30, which comprises a pressing member 40 and a support member 50. The pressing member 40 is connected to the top cover assembly 20 and located between the top cover assembly 20 and the electrode assembly 60. In the event of thermal runaway, the electrode assembly 60 will move towards the top cover assembly 20 and the pressing member 40 and press against the pressing member 40, thus giving the pressing member 40 a tendency to move towards the top cover assembly 20. Since the support member 50 is connected to the inner wall of the housing 10, when the top cover assembly 20 and the pressing member 40 are installed relative to the housing 10, at least a portion of the structure of the support member 50 can be positioned between the pressing member 40 and the top cover assembly 20. Therefore, the crimping member 40 is partially blocked by the support member 50 between the crimping member 40 and the top cover assembly 20, which also blocks the movement of the electrode assembly 60. At this time, a channel for gas to pass through the battery 100 can be formed between the electrode assembly 60, the crimping member 40 and the top cover assembly 20, thereby preventing the explosion-proof valve 23 from being blocked and improving the safety of the battery 100.

[0061] Furthermore, when the top cover assembly 20 and the crimping member 40 are installed relative to the housing 10, at least a portion of the structure of the support member 50 can move towards the inner wall of the housing 10 under the pressure of the crimping member 40. With this configuration, during the installation of the top cover assembly 20 and the crimping member 40 relative to the housing 10, the crimping member 40 presses at least a portion of the support member 50, causing it to move towards the inner wall of the housing 10, thus preventing the support member 50 from affecting the installation of the top cover assembly 20 and the crimping member 40, allowing them to be smoothly installed onto the housing 10. When the top cover assembly 20 and the crimping member 40 are in place relative to the housing 10, at least a portion of the support member 50 is positioned between the crimping member 40 and the top cover assembly 20, thus the support member 50 acts as a barrier against the crimping member 40, preventing the top cover assembly 20 and the crimping member 40 from detaching from the housing 10. This can also serve to pre-position the top cover assembly 20 before welding the top cover assembly 20 and the housing 10.

[0062] In other words, the battery 100 of this application can effectively block the support member 50 from the press member 40 and the electrode assembly 60 in the event of thermal runaway, ensure that the top cover assembly 20 and the press member 40 are not interfered with by the support member 50 during installation, and also play a pre-positioning role for the top cover assembly 20 before welding.

[0063] In this application, battery 100 can be a cylindrical battery, a prismatic battery, etc. This application uses a prismatic battery as an example for illustration. The case of other types of batteries is similar and will not be described in detail here.

[0064] In the battery 100 of this application, the housing 10 includes an opening, and the top cover assembly 20 is closed in the opening, thereby forming a closed receiving cavity Z together with the housing 10, and the electrode assembly 60 can be accommodated in the receiving cavity Z.

[0065] Please continue reading. Figure 3 and Figure 4 The top cover assembly 20 includes a top cover 21 and a lower insulating member 24 disposed on the side of the top cover 21 facing the electrode assembly 60. The lower insulating member 24 may be, for example, a lower plastic member, which is prone to melting due to high temperatures under conditions such as thermal runaway. The top cover assembly 20 also includes a first terminal post 221, a second terminal post 222, and an explosion-proof valve 23, which are disposed on the top cover 21. It is understood that in the event of thermal runaway, the explosion-proof valve 23 will open to allow gas to escape from the battery 100. The explosion-proof valve 23 is located approximately at the center of the top cover 21 along the second direction S.

[0066] In some embodiments, the crimping member 40 may be connected to the top cover assembly 20. For example, the crimping member 40 may be connected to the lower insulator 24 by fasteners, or it may be connected to the lower insulator 24 by other means. The crimping member 40 is located between the top cover assembly 20 and the electrode assembly 60, for example, the crimping member 40 may be located on the side of the lower insulator 24 facing the electrode assembly 60. In this way, in the event of thermal runaway, if the lower insulator 24 melts, the crimping member 40 may act as a barrier between the electrode assembly 60 and the explosion-proof valve 23 provided on the top cover 21.

[0067] The support member 50 is connected to the inner wall of the housing 10, ensuring that even if the lower insulating member 24 melts during thermal runaway, the support member 50 will not affect the support effect on the press-fit member 40. The support member 50 is made of the same material as the housing 10, or a material with the same electrode potential as the housing 10, to prevent galvanic corrosion from contact between the support member 50 and the housing 10. The connection between the support member 50 and the housing 10 can be achieved through welding or other methods.

[0068] When the top cover assembly 20 and the crimping member 40 are installed relative to the housing 10, at least a portion of the structure of the support member 50 can move towards the inner wall of the housing 10 under the pressure of the crimping member 40. This means that when the top cover assembly 20 and the crimping member 40 are installed relative to the housing 10, at least a portion of the structure of the support member 50 will be pressed by the crimping member 40 and moved towards the inner wall of the housing 10 to avoid the movement path of the top cover assembly 20 and the crimping member 40, thus preventing interference with their movement. In this application, the installation direction of the top cover assembly 20 and the crimping member 40 relative to the housing 10 can, for example, be along a third direction T. When the top cover assembly 20 and the crimping member 40 are installed relative to the housing 10, at least a portion of the structure of the support member 50 is able to be positioned between the crimping member 40 and the top cover assembly 20. This means that when the top cover assembly 20 and the crimping member 40 are installed relative to the housing 10, at least a portion of the structure of the support member 50 will be located between the crimping member 40 and the top cover assembly 20, thereby preventing the movement of the crimping member 40 and the electrode assembly 60 toward the top cover assembly 20 during thermal runaway.

[0069] In other words, at least part of the structure of the support member 50 will move towards the inner wall of the housing 10 under the pressure of the crimping member 40 during the installation of the top cover assembly 20 and the crimping member 40, and will always be located between the crimping member 40 and the top cover assembly 20 to block after installation.

[0070] Please see Figure 5 , Figure 6 , Figure 7 , Figure 5 This is a cross-sectional view of the battery 100 provided in an embodiment of this application from another angle. Figure 6 yes Figure 5 A magnified structural diagram of part B. Figure 7 yes Figure 5 An enlarged structural diagram of part C is shown. In some embodiments, the support member 50 is cantilevered and connected to the inner wall of the housing 10, with one end of the support member 50 connected to the inner wall of the housing 10 and the other end suspended. With this configuration, during the installation of the top cover assembly 20 and the pressing member 40 relative to the housing 10, the pressing member 40 can press the portion between the two ends of the support member 50, causing the support member 50 to rotate towards the inner wall of the housing 10. After installation, the pressing action of the pressing member 40 is released, and the support member 50 can return to its original position. The support member 50 can be selected as thin-walled, which facilitates elastic deformation after being pressed by the pressing member 40 and elastic reset after the pressing action is released.

[0071] Please continue reading. Figure 4 and Figure 6In some embodiments, the support member 50 includes a fixing portion 51 and a stop portion 52 connected to each other. The fixing portion 51 is connected to the inner wall of the housing 10. The stop portion 52 is tilted away from the inner wall of the housing 10 so that when the top cover assembly 20 and the crimping member 40 are installed relative to the housing 10, it can elastically deform towards the inner wall of the housing 10 under the pressure of the crimping member 40, or elastically return to its original position away from the inner wall of the housing 10 when the top cover assembly 20 and the crimping member 40 are installed in place relative to the housing 10, and extend between the top cover assembly 20 and the crimping member 40. With this configuration, when the top cover assembly 20 and the pressing member 40 are installed, the stop portion 52 can rotate towards the inner wall of the housing 10 with the fixing portion 51 as the fulcrum. After installation, the stop portion 52 can rotate in the opposite direction to elastically reset and extend between the top cover assembly 20 and the pressing member 40, thereby blocking between them. It should be noted that the end of the lower insulating member 24 near the support member 50 can be recessed to form a clearance space B for accommodating the corresponding support member 50. For example, a chamfered structure can be provided at the position of the stop portion 52 on the lower insulating member 24 to accommodate the stop portion 52. That is, in the normal use state of the battery 100, the stop portion 52 is located within this clearance space B. The chamfered structure can be a chamfered C-angle (straight angle) or a chamfered R-angle (rounded angle). In this application, a chamfered C-angle is used as an example for explanation, which, compared to a chamfered R-angle, creates a larger clearance space B. When the top cover assembly 20 and the crimping member 40 are installed relative to the housing 10, the stop portion 52 is pressed by the crimping member 40 and moves toward the inner wall of the housing 10, thereby exiting the clearance space B.

[0072] Understandably, because the stop portion 52 is elastically deformed by the pressure of the pressure member 40 during the installation of the top cover assembly 20 and the pressure member 40, and elastically resets itself when the top cover assembly 20 and the pressure member 40 are in place, the stop portion 52 of the support member 50 can provide an elastic buffer for the pressure member 40 and the electrode assembly 60 at the bottom of the pressure member 40. When the battery 100 encounters external impacts such as drops, if the electrode assembly 60 and the pressure member 40 float up and encounter the support member 50, the elastic buffering effect of the support member 50 can reduce the impact force when the electrode assembly 60 floats up, preventing the electrode assembly 60 from impacting the explosion-proof valve 23 and causing the explosion-proof valve 23 to open, thereby improving the safety of the battery 100.

[0073] In some embodiments, please continue to combine Figure 4 and Figure 6The housing includes a first housing region 11 and a second housing region 12, which are arranged sequentially along the height direction of the battery, i.e., the third direction T. The inner wall of the first housing region 11 protrudes inward relative to the interior of the second housing region 12 in the direction of the housing 10 wall thickness. That is, the wall thickness of the first housing region 11 is greater than the wall thickness of the second housing region 12. The fixing part 51 is connected to the first housing region 11, and the stop part 52 is positioned corresponding to the second housing region 12 and protrudes in a direction away from the inner wall of the second housing region 12. With this configuration, the interior of the second housing region 12 has a relatively larger space compared to the interior space of the first housing region 11. For the stop part 52, which needs to be deformed by protrusion, being positioned corresponding to the second housing region 12 provides more deformation space. In a specific implementation, the wall thickness of the first housing region 11 can gradually increase from the electrode assembly 60 towards the top cover 21. Here, the first housing region 11 can be a circumferential annular wall surrounding the top cover assembly.

[0074] Please continue reading. Figure 6 In some embodiments, the stop portion 52 is partially formed as a guide slope 521 away from the inner wall surface of the housing 10. The guide slope 521 is used to abut against the crimping member 40 when the top cover assembly 20 and the crimping member 40 are installed relative to the housing 10, and to guide the installation of the crimping member 40 relative to the housing 10. The guide slope 521 is inclined away from the inner wall of the housing 10 along the direction from the top cover assembly 20 to the electrode assembly 60.

[0075] In some embodiments, the surface of the fixing part 51 facing away from the inner wall of the housing 10 is defined as the first surface 511, and the included angle Q between the first surface 511 and the guide slope 521 satisfies: 120°≤Q≤175°. When the included angle Q is less than 120°, the elastic force generated by the stop part 52 will be too large, that is, the downward elastic force applied by the stop part 52 to the crimping member 40 will be too large, which will easily scratch the electrode assembly 60. When the included angle Q is greater than 175°, when the stop part 52 applies elastic force to the crimping member 40, it is easy to detach from the crimping member 40, that is, it is easy to detach from the gap between the crimping member 40 and the housing 10. When the included angle Q satisfies: 120°≤Q≤175°, the support member 50 can apply an appropriate elastic force to the crimping member 40, and can effectively prevent the support member 50 from detaching from the crimping member 40.

[0076] Understandably, to avoid metal shavings generated by frictional contact between the stop portion 52 and the crimping member 40, it is advisable to flip the tail portion 522 of the stop portion 52 towards the inner wall of the housing 10, so that the stop portion 52 is formed into a hook shape with the tail portion 522 folded inward. That is, the bent outer surface of the tail portion 522 of the stop portion 52 is set as an arc-shaped surface. And the tail portion 522 of the stop portion 52 is folded inward, that is, when the surface of the crimping member 40 facing the top cover assembly 20 is used as the reference plane, the tail portion 522 of the stop portion 52 is flipped away from the reference plane relative to the reference plane, so as to prevent the tail portion 522 of the stop portion 52 from inserting into the electrode assembly 60 when the electrode assembly 60 floats towards the top cover assembly 20, causing the electrode assembly 60 to short-circuit.

[0077] Please see Figure 6 and Figure 7 To ensure that the support member 50 has good elastic deformation capability, it can be constructed as a thin-walled structure. Thin-walled means that the thickness dimension K of the support member 50 is smaller than the dimension a along the second direction S and the dimension b along the third direction T.

[0078] For ease of explanation, Figure 6 In the middle, the support member 50 is shown separately. Figure 6 In the upper right corner of the figure, in some embodiments, the thickness dimension K of the support member 50, the dimension a of the support member 50 along the second direction S, and the dimension b of the support member 50 along the third direction T satisfy the following relationship: 1.5K<a<10K, 5K<b<25K.

[0079] If a is greater than 10K, or b is greater than 25K, the support member 50 will occupy too much internal space. If a is less than 1.5K, or b is less than 5K, it will affect the anti-reverse effect of the support member 50 on the press-fit member 40.

[0080] Define G as the width of the overlapping portion of the orthographic projection of the crimping member 40 and the tail 522 onto the target plane along the first direction F, where the target plane is perpendicular to the third direction T. The thickness K and width G of the support member 50 satisfy: 0.15mm ≤ G ≤ 5K. When G < 0.15mm, the crimping member 40 may bend towards the top cover assembly 20 when subjected to the upward force of the electrode assembly 60, causing the support member 50 to slide out of the crimping member 40. When G > 5K, the crimping member 40 may experience excessive friction with the support member 50 during installation relative to the housing 10, resulting in metal debris falling into the electrode assembly 60 and causing a short circuit in the electrode assembly 60.

[0081] In some embodiments, the distance P between the end face of the tail portion 522 and the inner wall of the housing 10 satisfies the width dimension G: P ≥ G. Thus, when the crimping member 40 is installed onto the housing 10, the crimping member 40 presses against the stop portion 52, causing the stop portion 52 to move towards the inner wall of the housing 10, increasing the included angle Q. After the end face of the tail portion 522 of the stop portion 52 abuts against the inner wall of the housing 10, the stop portion 52 stops moving. The crimping member 40 slides downwards on the guide slope 521, maintaining a suitable interaction force with the stop portion 52. If P < G, the stop portion 52 moves a short distance P towards the inner wall of the housing 10 and then stops moving. The friction between the stop portion 52 and the guide slope 521 is large, resulting in severe scraping of the stop portion 52 during the installation of the crimping member 40, which can generate metal shavings. By making P≥G, the tail 522 of the stop part 52 moves toward the inner wall of the housing 10 by a distance greater than or equal to G, which can reduce the scraping between the pressing part 40 and the stop part 52 during the movement.

[0082] Please see Figure 5 , Figure 8 and Figure 9 , Figure 8 This is a schematic diagram of the structure of the top cover assembly 20 and the limiting assembly 30 cooperating with each other in the battery 100 provided in the embodiments of this application. Figure 9 This is a schematic diagram of the structure of the battery 100 provided in this application, in which the crimping member 40 and the support member 50 cooperate with each other. In some embodiments, the crimping member 40 extends along the first direction F, and each crimping member 40 is provided with two support members 50, which are located on both sides of the lower insulating member 24 along the first direction F. One crimping member 40 and the corresponding two support members 50 are used in a group, and the two support members 50 are respectively located at the two ends of the crimping member 40 along the first direction F.

[0083] In the battery 100, there are two crimping members 40, which are respectively disposed at the two ends of the lower insulating member 24 along the second direction S. That is, the battery 100 has two such mating sets, one set of crimping members 40 and two support members 50 is located at one end of the lower insulating member 24 along the second direction S, and the other set of crimping members 40 and two support members 50 is located at the other end of the lower insulating member 24 along the second direction S. This is because the length of the battery 100 along the second direction S is relatively long, and this arrangement can better support the two ends of the electrode assembly 60 in the second direction S, thereby effectively preventing the electrode assembly 60 from moving.

[0084] Please continue reading. Figure 7 and Figure 9The crimping member 40 includes a main body 41 and at least two vertical wall portions 42 connected to the main body 41. The at least two vertical wall portions 42 are located on the side of the main body 41 facing the top cover assembly 20, and are spaced apart from each other. The vertical wall portions 42 enhance the bending strength of the main body 41. In some embodiments, the main body 41 is further provided with a reinforcing structure 43 to further enhance its strength. The reinforcing structure 43 may be provided on the surface of the main body 41 facing the top cover assembly 20. Additionally, the main body 41 may also have mounting holes 44 to facilitate the mounting of the crimping member 40 onto the lower insulating member 24 using fasteners or the like.

[0085] In some embodiments, there are two vertical wall portions 42, which are respectively located on both sides of the corresponding support member 50 along the second direction S. The two vertical wall portions 42 can extend along the first direction F. The vertical wall portions 42 can block the support member 50 on both sides along the second direction S, thereby preventing the support member 50 from sliding out of the press-fit member 40 in the second direction S in the event of thermal runaway.

[0086] Optionally, the angle D between the facing surfaces of the two vertical wall portions 42 and the surface of the main body portion 41 facing the top cover assembly 20 both satisfy: 45° ≤ D ≤ 135°. For example, the angle D can be 90°. This arrangement allows the bending strength of the press-fit member 40 to be maximized.

[0087] Furthermore, to prevent metal debris from being generated by mutual scraping when the crimping member 40 and the support member 50 come into contact during movement, at least one end of the main body portion 41 of the crimping member 40 along the first direction F can be chamfered. For example, both ends of the main body portion 41 of the crimping member 40 along the first direction F can be chamfered to reduce the degree of scraping when the crimping member 40 and the corresponding support member 50 come into contact during movement. Alternatively, both ends of the main body portion 41 of the crimping member 40 along the first direction F can be chamfered to reduce the degree of scraping when both ends of the crimping member 40 come into contact with the corresponding support member 50 during movement.

[0088] Figure 10 This is an exploded structural diagram showing the interaction between the pressure connector and the support member in the battery provided in this application embodiment. Please refer to... Figure 4 and Figure 10Referring to some embodiments, the lower insulating member 24 includes an insulating member body 240 and a boss 241, the boss 241 protruding relative to the insulating member body 240 toward the electrode assembly 60. A crimping member 40 is connected to the end face of the boss 241 facing away from the insulating member body 240, and a support member 50 corresponding to the crimping member 40 is located between the crimping member 40 and the insulating member body 240. If the crimping member 40 is directly connected to the insulating member body 240, the distance between the crimping member 40 and the insulating member body 240 is too close, and the crimping member 40 cannot contact the support member 50. However, by providing the boss 241, the crimping member 40 can be supported at a position with a certain distance from the top cover 21, facilitating the insertion of part of the support member 50 between the crimping member 40 and the insulating member body 240, and enabling the crimping member 40 and the support member 50 to contact each other.

[0089] In addition, the crimping member 40 needs to be insulated from the electrode assembly 60. In some embodiments, the crimping member 40 and the electrode assembly 60 are spaced apart along the height direction of the battery, i.e., in a third direction, to ensure insulation. Furthermore, the material of the crimping member 40 can be an insulating ceramic material or a surface-insulating metal material.

[0090] On the other hand, this application also discloses a battery pack, which includes the battery as described above and has all of its beneficial effects, which will not be repeated here.

[0091] This application also discloses an energy storage device, including the battery pack described above. The energy storage device described above possesses all the beneficial effects of the battery pack in the foregoing embodiments, which will not be repeated here.

[0092] This application also discloses an energy storage system, including the energy storage device described above. The above-described energy storage system has all the beneficial effects of the energy storage device in the foregoing embodiments, which will not be repeated here.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery, characterized by, include: A housing and a top cover assembly, wherein the housing and the top cover assembly together enclose a receiving cavity, and the top cover assembly includes an explosion-proof valve; Electrode assembly, the electrode assembly being housed within the receiving cavity; and A limiting component, comprising a pressing member and a supporting member, wherein the pressing member is connected to the top cover assembly and is located between the top cover assembly and the electrode assembly, and the supporting member is connected to the inner wall of the housing; When the top cover assembly and the crimping member are installed relative to the housing, at least a portion of the structure of the support member can move towards the inner wall of the housing under the pressure of the crimping member to avoid it. When the top cover assembly and the crimping member are installed in place relative to the housing, at least a portion of the structure of the support member can be positioned between the crimping member and the top cover assembly.

2. The battery of claim 1, wherein, The support member is cantilevered, with one end connected to the inner wall of the housing and the other end suspended in the air.

3. The battery of claim 2, wherein, The support member includes a fixing part and a stop part that are connected to each other; The fixing part is connected to the inner wall of the housing; The stop portion is tilted away from the inner wall of the housing so that it can elastically deform towards the inner wall of the housing under the pressure of the crimping member when the top cover assembly and the crimping member are installed relative to the housing, or elastically return to its original position away from the inner wall of the housing when the top cover assembly and the crimping member are installed in place relative to the housing, and extend between the top cover assembly and the crimping member.

4. The battery of claim 3, wherein, The stop portion is partially formed as a guide slope away from the inner wall surface of the housing. The guide slope is used to press against the press-fit member when the top cover assembly and the press-fit member are installed relative to the housing, and to guide the installation of the press-fit member relative to the housing.

5. The battery of claim 4, wherein, The surface of the fixing part that is away from the inner wall of the housing is defined as the first surface, and the angle Q between the first surface and the guide slope satisfies: 120°≤Q≤175°.

6. The battery of claim 3, wherein, The tail of the stop portion is flipped toward the inner wall of the housing so that the stop portion is formed into a hook shape with the tail tucked inward.

7. The battery of claim 6, wherein, In the battery, a first direction, a second direction, and a third direction are defined to be perpendicular to each other. The third direction is the height direction of the battery. The dimension of the battery along the second direction is greater than the dimension of the battery along the first direction. The support member is constructed as a thin-walled structure; the width dimension along the first direction of the overlapping portion of the press-fit member and the tail portion projected onto the target plane is defined as G, wherein the target plane is perpendicular to the third direction; The thickness K of the support member and the width G satisfy the following conditions: 0.15mm ≤ G ≤ 5K; and / or The distance P between the end face of the tail and the inner wall of the housing satisfies the width dimension G: P ≥ G.

8. The battery of claim 3, wherein, The housing includes a first housing area and a second housing area, which are arranged sequentially along the height direction of the battery; and the inner wall of the first housing area protrudes inward relative to the interior of the second housing area in the direction of housing wall thickness. The fixing part is connected to the first housing area, and the stop part is positioned corresponding to the second housing area and is raised away from the inner wall of the second housing area.

9. The battery of any one of claims 1-8, wherein, The top cover assembly also includes a top cover and a lower insulating component; The explosion-proof valve is located on the top cover; The lower insulating member is connected to the side of the top cover facing the electrode assembly, and the crimping member is connected to the side of the lower insulating member facing the electrode assembly.

10. The battery of claim 9, wherein, In the battery, a first direction, a second direction, and a third direction are defined to be perpendicular to each other. The third direction is the height direction of the battery. The dimension of the battery along the second direction is greater than the dimension of the battery along the first direction. The crimping member extends along the first direction, and each crimping member is provided with two supporting members, which are located on both sides of the lower insulating member along the first direction.

11. The battery of claim 10, wherein, The lower insulating member is recessed at its end near the support member to form a clearance space to accommodate the corresponding support member.

12. The battery according to claim 10, characterized in that, The crimping member includes a main body and at least two vertical wall portions connected to the main body; The at least two of the vertical wall portions are located on the side of the main body facing the top cover assembly, and the vertical wall portions are arranged at intervals.

13. The battery of claim 12, wherein, The number of the upright wall portions is two, and the two upright wall portions are respectively located on both sides of the corresponding support member along the second direction, and the two upright wall portions extend along the first direction.

14. The battery of claim 13, wherein, The angle D between the facing surfaces of the two vertical wall portions and the surface of the main body portion facing the top cover assembly both satisfy: 45° ≤ D ≤ 135°; and / or At least one end of the main body along the first direction is chamfered.

15. The battery of claim 12, wherein, The main body has a reinforcing structure on the side surface facing the top cover assembly.

16. The battery of claim 12, wherein, The number of the crimping members is two, and the two crimping members are respectively disposed at the two ends of the lower insulating member along the second direction.

17. The battery of claim 11, wherein, The lower insulating member includes an insulating member body and a boss, the boss protruding relative to the insulating member body toward the electrode assembly; The crimping member is connected to the end face of the boss that is away from the main body of the insulating component, and the support member corresponding to the crimping member is located between the crimping member and the main body of the insulating component.

18. The battery according to any one of claims 1-8, characterized in that, The press-fit member and the electrode assembly are spaced apart along the height direction of the battery.

19. A battery pack, characterized in that, It includes at least one battery as described in any one of claims 1-16.

20. An energy storage device, comprising: Includes the battery pack as described in claim 19.

21. An energy storage system characterized by, Includes the energy storage device as described in claim 20.

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