Energy storage device and power utilization system

Abstract

The application provides an energy storage device and a power utilization system. The energy storage device comprises a battery module, a mounting bracket and a pressure relief bracket. The battery module comprises a plurality of batteries arranged in sequence along a first direction. The battery comprises an explosion-proof valve. The mounting bracket is arranged on one side of the battery module. The mounting bracket comprises a plurality of exhaust holes. One exhaust hole corresponds to the explosion-proof valve of one battery. The pressure relief bracket is arranged on the side of the mounting bracket away from the battery module. The pressure relief bracket and the mounting bracket form a pressure relief channel. The pressure relief channel is communicated with the exhaust holes. When the internal pressure of the battery exceeds a threshold value due to failure, the gas released by the battery directly enters the pressure relief channel formed by the mounting bracket and the pressure relief bracket through the explosion-proof valve and the exhaust hole. The high-temperature and high-pressure gas sprayed from the battery can be isolated from the battery module, thereby avoiding the problem of heat spread caused by the random movement of the high-temperature and high-pressure gas in the battery module. The conductive material sprayed from the battery can be isolated from the battery module, thereby avoiding the short circuit of the battery module.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to an energy storage device and a power system. Background Technology

[0002] Battery end caps are typically equipped with explosion-proof valves or diaphragms. These valves or diaphragms allow gases and substances inside the battery to escape when internal pressure increases, reducing the risk of explosion. However, the ejection of these gases and substances through the explosion-proof valves onto the battery's aluminum busbars (electrical connectors) can easily lead to short circuits and thermal runaway. In related technologies, thermal runaway protection solutions often involve attaching mica sheets to the aluminum busbars. However, over time, the adhesive strength of the mica sheets decreases, and they easily detach, failing to effectively isolate the substances ejected from the aluminum busbars and the battery's explosion-proof valves. Utility Model Content

[0003] The purpose of this application is to provide an energy storage device and power system to solve the technical problem that the thermal runaway protection scheme of batteries in related technologies cannot effectively isolate the substances ejected from the aluminum busbar and the battery explosion-proof valve.

[0004] In a first aspect, this application provides an energy storage device, comprising: A battery module, the battery module comprising multiple batteries arranged sequentially along a first direction, the batteries including an explosion-proof valve; A mounting bracket is disposed on one side of the battery module. The mounting bracket includes a plurality of vent holes arranged sequentially along the first direction, with each vent hole corresponding to one explosion-proof valve of the battery. A pressure relief bracket is provided on the side of the mounting bracket away from the battery module. The pressure relief bracket and the mounting bracket form a pressure relief channel, which is connected to the vent.

[0005] In the energy storage device provided by this company, the battery module includes batteries arranged sequentially along a first direction. A mounting bracket is located on one side of the battery module and includes multiple vent holes arranged sequentially along the first direction. Each vent hole corresponds to an explosion-proof valve for one battery. A pressure relief bracket is located on the side of the mounting bracket away from the battery module. The pressure relief bracket and the mounting bracket form a pressure relief channel connecting the vent holes. When the internal pressure of the battery exceeds a threshold due to a fault (such as thermal runaway), the high-temperature and high-pressure gas released passes through the explosion-proof valve and the vent holes, directly entering the pressure relief channel formed by the mounting bracket and the pressure relief bracket. This isolates the high-temperature and high-pressure gas ejected from the battery from the battery module, preventing the high-temperature and high-pressure gas from spreading randomly within the battery module and causing heat propagation problems. It also isolates conductive materials ejected from the battery from the battery module, preventing short circuits in the battery module.

[0006] One end of the pressure relief bracket and one end of the mounting bracket form a pressure relief port, which is connected to the pressure relief channel.

[0007] The mounting bracket includes a mounting body and a mounting sidewall, the mounting sidewall surrounding the outer periphery of the mounting body. The pressure relief bracket includes a pressure relief body and a pressure relief sidewall, the pressure relief sidewall surrounding the outer periphery of the pressure relief body. The pressure relief body and the mounting body are spaced apart to form the pressure relief channel.

[0008] The mounting sidewall has a first mating part, and the pressure relief sidewall has a second mating part. The first mating part and the second mating part cooperate to fix the pressure relief bracket to the mounting bracket. One of the first mating part and the second mating part is a male buckle, and the other is a female buckle.

[0009] The pressure relief bracket has a first surface facing the battery module, and the explosion-proof valve has a second surface facing the pressure relief bracket. The distance between the first surface and the second surface is d1, where d1 is greater than or equal to 5 mm. The distance between the wall of the vent hole and the explosion-proof valve is d2, where d2 is greater than or equal to 1.5 mm.

[0010] The energy storage device further includes a shielding component, which is disposed on the first surface of the pressure relief bracket.

[0011] The mounting bracket is provided with multiple mounting slots, which are spaced apart on the surface of the mounting bracket away from the battery module. The energy storage device also includes: Multiple electrical connectors are spaced apart on one side of the mounting bracket. Each electrical connector is electrically connected to the battery, and each electrical connector is located in a mounting slot.

[0012] The mounting groove has a through hole at the bottom, through which the battery terminal passes and connects to the electrical connector; the mounting groove wall has multiple retaining members that retain the electrical connector; the retaining part has a guide slope away from the bottom of the mounting groove, which guides the electrical connector during installation.

[0013] The energy storage device further includes: A flexible circuit board is disposed on the side of the pressure relief bracket away from the battery module, and the flexible circuit board is connected to the electrical connector via an adapter. The housing is used to house the battery module. The side wall of the housing has a notch, which corresponds to the flexible circuit board and the pressure relief port.

[0014] Secondly, this application provides an electrical system, the electrical system comprising: Electrical equipment; and The energy storage device is used to supply power to the electrical equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of 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. Figure 1 This is a schematic diagram of the structure of an energy storage device including a pressure relief bracket according to an embodiment of this application; Figure 2 This is a schematic diagram of an energy storage device provided in this application, excluding a pressure relief bracket; Figure 3 This is a schematic cross-sectional view of the mounting bracket and pressure relief bracket provided in the embodiments of this application. Figure 1 ; Figure 4 yes Figure 1 Enlarged view of region A in the middle; Figure 5 This is a schematic cross-sectional view of the mounting bracket and pressure relief bracket provided in the embodiments of this application. Figure 2 ; Figure 6 This is a schematic diagram of the mounting bracket and pressure relief bracket provided in the embodiments of this application; Figure 7 yes Figure 1 Enlarged view of region B in the middle; Figure 8 This is a schematic diagram of the mounting bracket and electrical connector provided in the embodiments of this application; Figure 9 This is an exploded view of the mounting bracket and electrical connector provided in the embodiments of this application; Figure 10 yes Figure 9 Enlarged view of region C in the middle; Figure 11 This is a schematic diagram of the structure of the electrical connector provided in the embodiments of this application; Figure 12 This is a schematic diagram of the structure of an energy storage device including a flexible circuit board according to an embodiment of this application; Figure 13 This is a structural schematic diagram of an energy storage device including a housing provided in an embodiment of this application; Figure 14 This is a schematic diagram of the structure of an electrical system provided in an embodiment of this application.

[0016] Label Explanation: Energy storage device 100, battery module 10, battery 11, explosion-proof valve 111, mounting bracket 20, vent 21, mounting body 22, mounting side wall 23, first mating part 231, mounting groove 24, through hole 241, clamping part 242, pressure relief bracket 30, pressure relief body 31, pressure relief side wall 32, second mating part 321, pressure relief channel 41, pressure relief port 42, shielding part 50, electrical connector 60, first part 61, bending part 62, second part 63, welding hole 64, flexible circuit board 70, temperature sensor 71, housing 80, notch 81, electrical equipment 200, electrical system 1000, first surface M1, second surface M2, first direction D1. Detailed Implementation

[0017] 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.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0019] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately varied depending on the orientation of the constituent elements being described. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0020] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the meaning of these terms in this disclosure as appropriate.

[0021] Battery end caps are typically equipped with explosion-proof valves or diaphragms. These valves or diaphragms allow gases and substances inside the battery to escape when internal pressure increases, reducing the risk of explosion. However, the ejection of these gases and substances through the explosion-proof valves onto the battery's aluminum busbars (electrical connectors) can easily lead to short circuits and thermal runaway. In related technologies, thermal runaway protection solutions often involve attaching mica sheets to the aluminum busbars. However, over time, the adhesive strength of the mica sheets decreases, and they easily detach, failing to effectively isolate the substances ejected from the aluminum busbars and the battery's explosion-proof valves.

[0022] Please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of an energy storage device including a pressure relief bracket according to an embodiment of this application. Figure 2 This is a schematic diagram of an energy storage device provided in an embodiment of this application, excluding a pressure relief bracket. Figure 3 This is a schematic cross-sectional view of the mounting bracket and pressure relief bracket provided in the embodiments of this application. Figure 1 , Figure 4 yes Figure 1 An enlarged schematic diagram of region A in the middle.

[0023] This application provides an energy storage device 100 to solve the technical problem that the thermal runaway protection scheme of batteries in the related art cannot effectively isolate the substances ejected from the aluminum busbar and the battery explosion-proof valve.

[0024] The energy storage device 100 includes a battery module 10, a mounting bracket 20, and a pressure relief bracket 30. The battery module 10 includes multiple batteries 11 arranged sequentially along a first direction D1, and each battery 11 includes an explosion-proof valve 111. The mounting bracket 20 is located on one side of the battery module 10 and includes multiple vent holes 21 arranged sequentially along the first direction D1, with each vent hole 21 corresponding to the explosion-proof valve 111 of one battery 11. The pressure relief bracket 30 is located on the side of the mounting bracket 20 opposite to the battery module 10, and the pressure relief bracket 30 and the mounting bracket 20 form a pressure relief channel 41, which communicates with the vent holes 21.

[0025] The battery module 10 includes multiple batteries 11. It should be noted that the capacity of a single battery 11 is limited. To meet the power supply requirements of the power system, multiple batteries 11 are typically connected in series or parallel to form the energy storage device 100. Optionally, the battery 11 may include, but is not limited to, blade cells, prismatic cells, cylindrical cells, or other types of cells. Further optionally, the battery 11 may be, but is not limited to, a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery.

[0026] The battery 11 includes the explosion-proof valve 111, which is a "safety pressure relief port" for the battery 11. When the internal pressure of the battery 11 rises suddenly due to abnormal conditions such as overcharging, short circuit, or high temperature, the explosion-proof valve 111 will automatically open to release the high-temperature and high-pressure gas (which may contain flammable components) and other substances inside, thus preventing the battery 11 from exploding.

[0027] The mounting bracket 20 includes a plurality of vent holes 21 arranged sequentially along the first direction D1. Each vent hole 21 corresponds to an explosion-proof valve 111, allowing gas released from the battery 11 to directly enter the pressure relief channel 41 through the corresponding vent hole 21, thus preventing disorderly diffusion of gas among the battery modules 10. Understandably, in this embodiment, one explosion-proof valve 111 for each battery 11 corresponds to one vent hole 21, and different explosion-proof valves 111 for different batteries 11 correspond to different vent holes 21. Alternatively, multiple vent holes 21 can be configured one-to-one with multiple explosion-proof valves 111 for each battery 11.

[0028] The energy storage device 100 also includes the pressure relief bracket 30, which is installed on the outside of the mounting bracket 20 (i.e., the side away from the battery module 10). The pressure relief bracket 30 and the mounting bracket 20 together form the pressure relief channel 41. Further, one end of the pressure relief bracket 30 and one end of the mounting bracket 20 form a pressure relief port 42, which connects to the pressure relief channel 41. The pressure relief channel 41 connects to all the vent holes 21 on the mounting bracket 20, acting as a concentrator. When one or more batteries 11 discharge gas through the vent holes 21, the pressure relief channel 41 collects the dispersed gas and ultimately directs it to the outside of the energy storage device 100 (or a designated safe area, such as away from circuits or flammable materials; this application does not impose any restrictions on this) through the pressure relief port 42.

[0029] In the energy storage device 100 provided by this company, after the battery 11 malfunctions, the explosion-proof valve 111 opens to release gas. The gas enters the pressure relief channel 41 through the exhaust port 21 directly opposite the explosion-proof valve 111. The pressure relief channel 41 collects the dispersed gas and guides it to the ends of the pressure relief bracket 30 and the mounting bracket 20. The collected gas is then directly discharged to the outside of the energy storage device 100 (or a preset safe area) through the pressure relief port 42. By placing the pressure relief port 42 at the ends of the pressure relief bracket 30 and the mounting bracket 20, the direct impact of high-temperature and high-pressure gas on the critical components inside the energy storage device 100, or the accumulation of explosive mixture inside the energy storage device 100, can be avoided, thus eliminating secondary safety risks from the outlet end.

[0030] Furthermore, if the opening of the pressure relief port 42 is too small, it will cause the gas flow rate in the pressure relief channel 41 to slow down and pressure to accumulate, which may crack the pressure relief bracket 30. If the opening of the pressure relief port 42 is too large, it may cause external foreign objects (such as dust or water droplets) to enter the pressure relief channel 41, affecting the internal structure. Therefore, in this embodiment, the cross-sectional area of ​​the pressure relief port 42 needs to correspond to the cross-sectional area of ​​the pressure relief channel 41, including but not limited to the fact that the cross-sectional area of ​​the pressure relief port 42 needs to be the same as or approximately the same as the cross-sectional area of ​​the pressure relief channel 41, so that the pressure relief port 42 can effectively discharge the gas or substances in the pressure relief channel 41.

[0031] In the energy storage device 100 provided by this company, the battery module 10 includes batteries 11 arranged sequentially along the first direction D1. The mounting bracket 20 is disposed on one side of the battery module 10. The mounting bracket 20 includes a plurality of vent holes 21 arranged sequentially along the first direction D1. Each vent hole 21 corresponds to an explosion-proof valve 111 of one battery 11. The pressure relief bracket 30 is disposed on the side of the mounting bracket 20 away from the battery module 10. The pressure relief bracket 30 and the mounting bracket 20 form a pressure relief channel 41 communicating with the vent holes 21. When the internal pressure of the battery 11 exceeds the threshold due to a fault (such as thermal runaway), the high-temperature and high-pressure gas released is directly introduced into the pressure relief channel 41 formed by the mounting bracket 20 and the pressure relief bracket 30 through the explosion-proof valve 111 and the exhaust port 21. This can isolate the high-temperature and high-pressure gas ejected from the battery 11 from the battery module 10, preventing the high-temperature and high-pressure gas from running rampant in the battery module 10 and causing problems such as heat spread. It can also isolate the conductive material ejected from the battery 11 from the battery module 10, preventing short circuits in the battery module 10.

[0032] Please refer to Figures 1 to 5 , Figure 5 This is a schematic cross-sectional view of the mounting bracket and pressure relief bracket provided in the embodiments of this application. Figure 2 .

[0033] In one embodiment, the pressure relief bracket 30 has a first surface M1 facing the battery module 10, and the explosion-proof valve 111 has a second surface M2 facing the pressure relief bracket 30. The distance between the first surface M1 and the second surface M2 is d1, and d1 satisfies the range: d1≥5mm. Specifically, the first surface M1 is the inner surface of the pressure relief bracket 30 facing the battery module 10, the second surface M2 is the surface of the explosion-proof valve 111 of the battery 11 facing the pressure relief bracket 30 (i.e., the outer surface of the explosion-proof valve 111), and d1 is the vertical distance between the first surface M1 and the second surface M2. It can be understood that d1 is the shortest distance from the outer surface of the explosion-proof valve 111 to the inner surface of the pressure relief bracket 30.

[0034] The distance between the first surface M1 and the second surface M2 is d1, and d1 satisfies the range: d1≥5mm, which can ensure gas discharge efficiency and avoid pressure blockage. Specifically, it should be noted that when the battery 11 malfunctions and the explosion-proof valve 111 opens, high-temperature and high-pressure gas will be ejected from the explosion-proof valve 111 at a relatively fast speed, forming a jet-like process. If d1 is too small, the ejected gas may directly impact the first surface M1 of the pressure relief bracket 30, causing the gas to rebound or form turbulence in the narrow space, increasing frictional resistance, resulting in a slower exhaust speed and failure to discharge smoothly from the pressure relief port 42.

[0035] Therefore, in this embodiment, the d1 satisfies the range: d1≥5mm, which provides a buffer diffusion space for the gas. After the gas is ejected from the explosion-proof valve 111, it can initially diffuse and decelerate within this gap before smoothly entering the corresponding exhaust port 21, ensuring that most of the gas can enter the pressure relief channel 41 along a preset path. Furthermore, since the battery module 10 includes multiple batteries 11, the d1≥5mm width of the pressure relief channel 41 is large enough to accommodate the gas discharged simultaneously from multiple batteries 11 (especially when multiple batteries 11 fail simultaneously), preventing gas from accumulating in the pressure relief channel 41 and causing excessive pressure, which could crack the pressure relief bracket 30.

[0036] Optionally, d1 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, or other values ​​greater than 5mm, and this application does not limit it.

[0037] Furthermore, the battery 11 will expand in volume during charge-discharge cycles, high-temperature environments, or aging. If d1 is too small (e.g., <5mm), when the battery 11 expands, the battery 11 housing, where the explosion-proof valve 111 is located, may bulge towards the pressure relief bracket 30, causing the second surface M2 of the explosion-proof valve 111 to directly contact and compress with the first surface M1 of the pressure relief bracket 30. In severe cases, the explosion-proof valve 111 may be blocked, preventing it from opening normally when the internal pressure of the battery 11 increases (the explosion-proof valve 111 requires a certain deformation space to rupture or spring open), directly losing its safe pressure relief function. A d1 ≥ 5mm can effectively accommodate the normal expansion of the battery 11, and even under extreme expansion, it can avoid rigid interference between the explosion-proof valve 111 and the pressure relief bracket 30.

[0038] It should be noted that, in this embodiment, the space of the explosion-proof valve 111 of each battery 11 facing the pressure relief bracket 30 is connected to the exhaust port 21 corresponding to the explosion-proof valve 111. It can be understood that the orthographic projection of the explosion-proof valve 111 on the first surface M1 and the orthographic projection of the exhaust port 21 on the first surface M1 at least partially overlap, so that the gas discharged by the battery 11 through the explosion-proof valve 111 can enter the exhaust port 21 and enter the pressure relief channel 41 from the exhaust port 21.

[0039] Furthermore, in one embodiment, the orthographic projection of the explosion-proof valve 111 onto the first surface M1 completely falls into the orthographic projection of the vent 21 onto the first surface M1, ensuring that the path of the gas discharged from the battery 11 through the explosion-proof valve 111 is unobstructed, and all of it enters the vent 21 and then enters the pressure relief channel 41 through the vent 21.

[0040] Furthermore, in this embodiment, the distance between the wall of the exhaust port 21 and the explosion-proof valve 111 is d2, and d2 satisfies the range d2≥1.5mm.

[0041] The vent 21 is a through hole in the mounting bracket 20. The distance between the wall of the vent 21 and the explosion-proof valve 111 is d2. In other words, d2 is the shortest distance between the edge of the explosion-proof valve 111 and the wall of the vent 21.

[0042] It should be noted that in actual production, there will inevitably be slight deviations in the processing and assembly of the battery module 10 and the mounting bracket 20. For example, the battery 11 may be offset along the first direction D1 or the vertical direction during installation, and the vent hole 21 of the mounting bracket 20 may have dimensional deviations (such as slightly smaller hole diameter or positional offset). If d2 < 1.5mm, these errors may accumulate and cause the edge of the explosion-proof valve 111 to extend beyond the range of the vent hole 21, partially blocking the vent hole 21, directly resulting in gas not being able to fully enter the vent hole 21 (part of the gas is partially blocked by the mounting bracket 20).

[0043] The d2 ≥ 1.5 mm can fully accommodate the above error, ensuring that even if there is a deviation, the explosion-proof valve 111 is still completely within the coverage area of ​​the exhaust port 21, and the gas can enter the exhaust port 21 and enter the pressure relief channel 41 through the exhaust port 21.

[0044] Optionally, d2 can be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, or other values ​​greater than 1.5mm, and this application does not limit it.

[0045] Please refer to Figures 1 to 6 , Figure 6 This is a schematic diagram of the mounting bracket and pressure relief bracket provided in the embodiments of this application.

[0046] In one embodiment, the mounting bracket 20 includes a mounting body 22 and a mounting sidewall 23, the mounting sidewall 23 surrounding the outer periphery of the mounting body 22, and the pressure relief bracket 30 includes a pressure relief body 31 and a pressure relief sidewall 32, the pressure relief sidewall 32 surrounding the outer periphery of the pressure relief body 31, the pressure relief body 31 and the mounting body 22 being spaced apart to form the pressure relief channel 41.

[0047] The mounting sidewall 23 of the mounting bracket 20 (surrounding the outer periphery of the mounting body 22) and the pressure relief sidewall 32 of the pressure relief bracket 30 (surrounding the outer periphery of the pressure relief body 31) are aligned and fitted together, transforming the space between the mounting body 22 and the pressure relief body 31 into a closed cavity, which is the pressure relief channel 41. Furthermore, because the mounting sidewall 23 and the pressure relief sidewall 32 surround the outer periphery and cooperate with each other, the gas in the pressure relief channel 41 can only be discharged through the preset pressure relief port 42, and cannot leak from the edge gaps of the mounting bracket 20 and the pressure relief bracket 30, ensuring that the gas flows along the path of the exhaust hole 21, the pressure relief channel 41, and the pressure relief port 42.

[0048] Please refer to Figures 1 to 7 , Figure 7 yes Figure 1 Enlarged schematic diagram of region B in the middle.

[0049] In one embodiment, the mounting sidewall 23 is provided with a first mating part 231, and the pressure relief sidewall 32 is provided with a second mating part 321. The first mating part 231 and the second mating part 321 cooperate to fix the pressure relief bracket 30 to the mounting bracket 20, wherein one of the first mating part 231 and the second mating part 321 is a male buckle and the other is a female buckle.

[0050] The mounting bracket 20 has a first mating portion 231 on its mounting sidewall 23, and the pressure relief bracket 30 has a second mating portion 321 on its pressure relief sidewall 32. The first mating portion 231 and the second mating portion 321 have a male-female corresponding relationship. For example, the first mating portion 231 is an outwardly protruding male snap, and the second mating portion 321 is an inwardly recessed female snap; conversely, the second mating portion 321 is an outwardly protruding male snap, and the first mating portion 231 is an inwardly recessed female snap.

[0051] When assembling the pressure relief bracket 30 and the mounting bracket 20, align the pressure relief bracket 30 with the mounting bracket 20, align the second mating part 321 of the pressure relief sidewall 32 with the first mating part 231 of the mounting sidewall 23, apply slight pressure, and the male buckle will elastically engage with the female buckle, thereby achieving quick and secure assembly of the pressure relief bracket 30 and the mounting bracket 20.

[0052] Compared to screw fixing, the snap-fit ​​assembly of the pressure relief bracket 30 and the mounting bracket 20 is more efficient and suitable for mass production. Furthermore, the mating of the male and female snaps restricts the relative displacement (such as vertical or horizontal offset) of the pressure relief bracket 30 and the mounting bracket 20, ensuring that the interval between the pressure relief body 31 and the mounting body 22 remains unchanged, thus guaranteeing the dimensional stability of the pressure relief channel 41. Moreover, if the energy storage device 100 requires maintenance (such as cleaning the pressure relief channel 41), the male snap can be disassembled from the female snap using external force, achieving non-destructive disassembly of the pressure relief bracket 30.

[0053] Optionally, in this embodiment, the number of the first mating parts 231 and the second mating parts 321 is multiple and corresponds one-to-one. This application does not limit the number of the first mating parts 231 and the second mating parts 321. Multiple first mating parts 231 are arranged around the mounting sidewall 23, and multiple second mating parts 321 are arranged around the pressure relief sidewall 32 to improve the installation stability of the pressure relief bracket 30 and the mounting bracket 20.

[0054] In one embodiment, the energy storage device 100 further includes a shielding member 50, which is disposed on the first surface M1 of the pressure relief bracket 30.

[0055] It should be noted that if the high-temperature gas or sparks ejected from the explosion-proof valve 111 directly impact the pressure relief bracket 30, it can easily cause the pressure relief bracket 30 to soften, melt, or even burn, which may lead to damage or deformation of the pressure relief bracket 30, reducing the effective size of the pressure relief channel 41 and hindering gas discharge. The shielding member 50 can be used to directly withstand the high-temperature impact, preventing the pressure relief bracket 30 from being burned, so that the pressure relief channel 41 remains unobstructed at all times.

[0056] Optionally, in this embodiment, the shielding member 50 is a mica sheet. In other embodiments, the shielding member 50 may also be made of other materials, and this application does not limit this.

[0057] Optionally, in this embodiment, the shielding member 50 and the pressure relief bracket 30 are fixed by hot riveting.

[0058] Please refer to Figures 1 to 10 , Figure 8 This is a structural schematic diagram of the mounting bracket and electrical connector provided in the embodiments of this application. Figure 9 This is an exploded view of the mounting bracket and electrical connector provided in the embodiments of this application. Figure 10 yes Figure 9 A magnified view of region C in the middle.

[0059] In one embodiment, the mounting bracket 20 is provided with a plurality of mounting slots 24, which are spaced apart on the surface of the mounting bracket 20 away from the battery module 10.

[0060] The energy storage device 100 also includes a plurality of electrical connectors 60, which are spaced apart on one side of the mounting bracket 20. The electrical connectors 60 are electrically connected to the battery 11, and each electrical connector 60 is disposed in a mounting groove 24.

[0061] Each mounting groove 24 is a recessed cavity structure, and the dimensions of the mounting groove 24 are adapted to the electrical connector 60. The groove walls of the mounting groove 24 limit the electrical connector 60, preventing it from shifting during assembly or use. Furthermore, the spaced mounting grooves 24 separate adjacent electrical connectors 60, preventing direct contact between them and potential short circuits.

[0062] In this embodiment, multiple mounting slots 24 are spaced apart on the surface of the mounting bracket 20 opposite to the battery module 10, and each mounting slot 24 contains an electrical connector 60. Different electrical connectors 60 are positioned in different mounting slots 24, improving the stability of the electrical connector 60 fixed to the mounting bracket 20, and consequently improving the electrical connection stability between the electrical connector 60 and the battery 11. When the energy storage device 100 experiences vibration, the electrical connector 60 remains firmly positioned within the mounting slot 24, preventing it from detaching from the mounting bracket 20 and causing the energy storage device 100 to malfunction. Furthermore, it prevents electrical sparks caused by unstable electrical connection between the electrical connector 60 and the battery 11, thus improving the safety performance of the energy storage device 100.

[0063] In this embodiment, one electrical connector 60 is electrically connected to the positive terminal and the negative terminal of one battery 11, respectively. The battery module 10 of the energy storage device 100 needs to be connected in series to boost the total voltage to meet the power supply requirements of external devices. The core function of the electrical connector 60 is to act as a series node to ensure reliable conductivity between the positive and negative terminals of adjacent batteries 11, ensuring smooth power output from the entire battery module 10.

[0064] In other embodiments, the plurality of electrical connectors 60 electrically connect the plurality of batteries 11, or the plurality of batteries 11 may be connected in parallel or in a mixed configuration, and this application does not limit this.

[0065] Optionally, in this embodiment, the electrical connector 60 is made of aluminum. In other embodiments, the electrical connector 60 may also be made of copper, copper-aluminum composite, or other materials. This application does not impose any restrictions on this.

[0066] Please refer to Figures 1 to 11 , Figure 11 This is a schematic diagram of the structure of the electrical connector provided in the embodiments of this application.

[0067] The electrical connector 60 includes a first part 61, a bent part 62 and a second part 63 connected in sequence. The bent part 62 is arc-shaped and is further away from the bottom wall of the mounting groove 24 than the first part 61 and the second part 63. The first part 61 and the second part 63 are electrically connected to two adjacent batteries 11 respectively.

[0068] In the energy storage device 100 provided in this application embodiment, after a period of use, the battery 11 will expand to a certain extent due to overcharging or over-discharging. Since the batteries 11 are arranged sequentially along the first direction D1, adjacent batteries 11 move relative to each other in opposite directions. When the first part 61 and the second part 63 are electrically connected to the adjacent batteries 11 and have the bending part 62, the bending part 62 can provide a stretching allowance for the electrical connector 60. This allows the bending part 62 to provide a stretching allowance when the first part 61 and the second part 63 move in opposite directions with the batteries 11, preventing the electrical connector 60 from breaking due to excessive stretching. This allows multiple batteries 11 to be connected in series, parallel, or mixed, enabling the energy storage device 100 to work normally.

[0069] Please refer to Figures 1 to 11 In one embodiment, the bottom of the mounting groove 24 is provided with a through hole 241, through which the terminal of the battery 11 passes and connects to the electrical connector 60; the groove wall of the mounting groove 24 is provided with a plurality of retaining members 242, which retain the electrical connector 60; the retaining part has a guide slope away from the bottom of the mounting groove 24, which is used to guide the electrical connector 60 when it is installed.

[0070] It should be noted that the electrical connector 60 is fixed in the mounting groove 24 by the retaining member 242 and the bottom of the mounting groove 24, and the electrical connector 60 is welded to the electrical connector 60 in the mounting groove 24, so that the electrical connector 60 is pressed against the bottom of the mounting groove 24, generating pressure in the direction of the battery module 10. This pressure will cause the mounting bracket 20 to be pressed tightly against the surface of the battery module 10, thereby indirectly fixing the mounting bracket 20 to the battery module 10.

[0071] Furthermore, in this embodiment, the electrical connector 60 is provided with at least one welding hole 64. The welding hole 64 is used to electrically connect the terminal of the battery 11, which passes through the bottom of the mounting groove 24 and is electrically connected to the electrical connector 60 through the welding hole 64 when the battery 11 is assembled into the energy storage device 100. Furthermore, in this embodiment, the electrical connector 60 is provided with two welding holes 64, one in the first part 61 and the other in the second part 63.

[0072] When the electrical connector 60 is placed into the mounting groove 24 and connected to the pole, the retaining member 242 and the bottom of the mounting groove 24 abut against opposite sides of the electrical connector 60, restricting the electrical connector 60 from moving up and down within the mounting groove 24. Specifically, in this embodiment, multiple retaining members 242 are respectively disposed at opposite ends of the mounting groove 24 to improve the locking stability of the electrical connector 60. Optionally, in this embodiment, the number of retaining members 242 is 3. In other embodiments, the number of retaining members 242 may be 2, 4, or more than 4. This application does not impose any limitation on this.

[0073] The retaining member 242 has a guide slope facing away from the bottom of the mounting groove 24, which guides the electrical connector 60 smoothly into the groove. When installing the electrical connector 60, if it is directly aligned with the mounting groove 24 and pressed, it may be obstructed due to the hard contact between the edge of the electrical connector 60 and the retaining member 242. The guide slope allows the edge of the electrical connector 60 to contact the slope first. As the pressing force increases, the slope generates a lateral force, pushing the retaining member 242 to deform slightly outward, making way for the electrical connector 60 to enter the mounting groove 24. Furthermore, it can improve the assembly efficiency of the electrical connector 60. There is no need to precisely align the gaps between multiple retaining members 242. The electrical connector 60 can be automatically guided into place by the slope simply by roughly placing it into the mounting groove 24 and pressing it. This is especially suitable for automated assembly in mass production.

[0074] Please refer to Figures 1 to 12 , Figure 12 This is a schematic diagram of the structure of an energy storage device including a flexible circuit board, provided in an embodiment of this application.

[0075] In one embodiment, the energy storage device 100 further includes a flexible circuit board 70, which is disposed on the side of the pressure relief bracket 30 away from the battery module 10, and the flexible circuit board 70 is connected to the electrical connector 60 via an adapter.

[0076] The flexible circuit board 70 is located on the side of the pressure relief bracket 30 away from the battery module 10, which can prevent the flexible circuit board 70 from being directly affected by the high-temperature gas and debris inside the pressure relief channel 41.

[0077] It should be noted that the electrical connector 60 is a rigid metal sheet (aluminum busbar). The electrical connector 60 and the flexible circuit board 70 cannot be directly welded or made in contact, and reliable conductivity is achieved through the adapter.

[0078] Furthermore, the flexible circuit board 70 is provided with at least one temperature sensor 71, which can be used to collect temperature data of the battery module 10 and transmit the temperature data to the controller to monitor the status of the battery module 10 and prevent the battery module 10 from being overcharged, over-discharged or overheated.

[0079] Please refer to Figures 1 to 13 , Figure 13 This is a structural schematic diagram of an energy storage device including a housing, provided by an embodiment of this application.

[0080] In one embodiment, the energy storage device 100 further includes a housing 80 for housing the battery module 10. The side wall of the housing 80 is provided with a notch 81, which corresponds to the flexible circuit board 70 and the pressure relief port 42.

[0081] The housing 80 is capable of housing all components: it completely encloses the battery module 10 and its associated structures (the mounting bracket 20, the pressure relief bracket 30, the flexible circuit board 70, etc.) to prevent damage to the internal structure (such as loosening of the electrical connector 60 or deformation of the pressure relief channel 41) caused by external collisions or compression. Furthermore, the housing 80 can prevent external dust and moisture from entering the interior, preventing dust from causing short circuits in the electrical connector 60 and moisture from corroding the terminals of the battery 11.

[0082] Furthermore, the notch 81 of the housing 80 is aligned with the pressure relief port 42, ensuring that the high-temperature and high-pressure gas in the pressure relief channel 41 (released when the battery 11 thermally runs away) can be directly discharged to the outside of the housing 80 through the notch 81, rather than accumulating inside the housing (if the gas is trapped inside the housing 80, it will cause the pressure inside the housing 80 to rise sharply, causing the housing 80 to explode).

[0083] Furthermore, the flexible circuit board 70 needs to extend from inside the housing 80 to the outside (to connect to an external controller or load). The notch 81 provides a passage for the flexible circuit board 70 to pass through, preventing the flexible circuit board 70 from being squeezed and damaged by the housing 80, or from being broken due to forced bending.

[0084] Please refer to Figure 14 , Figure 14 This is a schematic diagram of the structure of an electrical system provided in an embodiment of this application.

[0085] This application also provides an electrical system 1000, which includes an electrical device 200 and an energy storage device 100, wherein the energy storage device 100 is used to supply power to the electrical device 200.

[0086] In this embodiment, the energy storage device 100 has high safety performance, so that when the energy storage device 100 is applied to the power system 1000, it can provide a stable power supply to the power equipment 200, so that the power system 1000 can work stably.

[0087] The power supply system 1000 in this application embodiment can be, but is not limited to, portable electronic devices such as mobile phones, tablets, laptops, desktop computers, smart bracelets, smartwatches, e-readers, and game consoles. It can also be a vehicle such as a car, truck, sedan, van, freight train, high-speed train, or electric vehicle. Furthermore, it can be various household appliances.

[0088] It is understood that the power system 1000 described in this embodiment is merely one form of the power system 1000 used by the energy storage device 100, and should not be construed as a limitation on the power system 1000 provided in this application, nor should it be construed as a limitation on the power system 1000 provided in various embodiments of this application.

[0089] In this application, the terms "embodiment" and "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of these phrases in various locations throughout the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described in this application can be combined with other embodiments. Furthermore, it should be understood that the features, structures, or characteristics described in the various embodiments of this application can be arbitrarily combined to form another embodiment that does not depart from the spirit and scope of the technical solution of this application, provided there is no contradiction between them.

[0090] The above description represents some embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. An energy storage device, characterized in that, include: A battery module, the battery module comprising multiple batteries arranged sequentially along a first direction, the batteries including an explosion-proof valve; The mounting bracket is disposed on one side of the battery module. The mounting bracket includes a plurality of vent holes arranged sequentially along the first direction, and each vent hole corresponds to an explosion-proof valve of the battery. as well as A pressure relief bracket is provided on the side of the mounting bracket away from the battery module. The pressure relief bracket and the mounting bracket form a pressure relief channel, which is connected to the vent.

2. The energy storage device according to claim 1, characterized in that, One end of the pressure relief bracket and one end of the mounting bracket form a pressure relief port, and the pressure relief port is connected to the pressure relief channel.

3. The energy storage device according to claim 2, characterized in that, The mounting bracket includes a mounting body and a mounting sidewall. The mounting sidewall surrounds the outer periphery of the mounting body. The pressure relief bracket includes a pressure relief body and a pressure relief sidewall. The pressure relief sidewall surrounds the outer periphery of the pressure relief body. The pressure relief body and the mounting body are spaced apart to form the pressure relief channel.

4. The energy storage device according to claim 3, characterized in that, The mounting sidewall is provided with a first mating part, and the pressure relief sidewall is provided with a second mating part. The first mating part and the second mating part cooperate to fix the pressure relief bracket to the mounting bracket, wherein one of the first mating part and the second mating part is a male buckle and the other is a female buckle.

5. The energy storage device according to claim 1, characterized in that, The pressure relief bracket has a first surface facing the battery module, and the explosion-proof valve has a second surface facing the pressure relief bracket. The distance between the first surface and the second surface is d1, where d1 satisfies the range: d1≥5mm; and / or, the distance between the wall of the vent hole and the explosion-proof valve is d2, where d2 satisfies the range: d2≥1.5mm.

6. The energy storage device according to claim 5, characterized in that, The energy storage device also includes a shielding member disposed on the first surface of the pressure relief bracket.

7. The energy storage device according to claim 2, characterized in that, The mounting bracket is provided with multiple mounting slots, which are spaced apart on the surface of the mounting bracket away from the battery module. The energy storage device also includes: Multiple electrical connectors are spaced apart on one side of the mounting bracket. Each electrical connector is electrically connected to the battery, and each electrical connector is located in a mounting slot.

8. The energy storage device according to claim 7, characterized in that, The bottom of the mounting groove is provided with a through hole, through which the battery terminal passes and connects to the electrical connector; the groove wall of the mounting groove is provided with a plurality of retaining members, which retain the electrical connector; the retaining part has a guide slope away from the bottom of the mounting groove, which is used to guide the electrical connector when it is installed.

9. The energy storage device according to claim 7, characterized in that, The energy storage device also includes: A flexible circuit board is disposed on the side of the pressure relief bracket away from the battery module, and the flexible circuit board is connected to the electrical connector via an adapter. The housing is used to house the battery module. The side wall of the housing has a notch, which corresponds to the flexible circuit board and the pressure relief port.

10. An electrical system, characterized in that, include: Electrical equipment; as well as The energy storage device according to any one of claims 1 to 9, wherein the energy storage device is used to supply power to the electrical equipment.

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