Insulating piece, end cover assembly, energy storage device and electric appliance

Abstract

The application discloses an insulating piece, an end cover assembly, an energy storage device and an electric equipment. The insulating piece comprises a first surface and a second surface arranged oppositely along a thickness direction. The insulating piece is sequentially and spacedly provided with a first flow guide groove, a liquid injection hole and a second flow guide groove along a first direction. The first flow guide groove comprises a plurality of first sub-grooves arranged spacedly along a second direction. The size of each first sub-groove along the second direction is the same. The groove bottom wall of each first sub-groove is provided with at least one first flow guide hole. The second flow guide groove comprises a plurality of second sub-grooves arranged spacedly along the second direction. Along the second direction, the size of the second sub-groove close to the middle position along the second direction is different from the size of the second sub-groove close to the two side positions along the second direction. The groove bottom wall of each second sub-groove is provided with at least one second flow guide hole. The insulating piece provided by the application can make the electrolyte between the insulating piece and the end cover quickly return to the battery cell, thereby avoiding the waste of the electrolyte.

Description

Technical Field

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

[0002] A secondary battery, also known as a rechargeable battery or accumulator, is a battery that can be recharged after discharge to reactivate its active materials and continue to be used. A secondary battery includes insulating components that insulate the end caps and terminals. There is usually a gap between the end caps and the insulating components. When electrolyte is added to the battery, it flows into this gap, resulting in a slower filling rate. Summary of the Invention

[0003] This application provides an insulating component, an end cap assembly, an energy storage device, and an electrical device, which can enable the electrolyte between the insulating component and the end cap to flow rapidly into the battery cell, thereby increasing the electrolyte injection speed.

[0004] In a first aspect, this application provides an insulating component for an energy storage device. The insulating component includes a first surface and a second surface, which are disposed opposite to each other along the thickness direction of the insulating component. The insulating component is provided with a first flow channel, an injection hole, and a second flow channel. The first flow channel, the injection hole, and the second flow channel are sequentially spaced apart along a first direction; the openings of both the first and second flow channels are located on the first surface, and the injection hole penetrates both the first and second surfaces along the thickness direction of the insulating component.

[0005] The first guide channel includes a plurality of first sub-channels spaced apart along a second direction, each of the first sub-channels having the same dimension along the second direction. Each first sub-channel has at least one first guide hole on its bottom wall, the first guide hole penetrating the bottom wall of the first sub-channel. The second guide channel includes a plurality of second sub-channels spaced apart along the second direction. Along the second direction, the dimensions of the second sub-channels near the middle position along the second direction differ from those of the second sub-channels near the sides. Each second sub-channel has at least one second guide hole on its bottom wall, the second guide hole penetrating the bottom wall of the second sub-channel. The first direction is perpendicular to the second direction.

[0006] In one possible implementation, the insulating member has a first center line parallel to the second direction, and the second center line is equidistant from two opposite edges of the insulating member along the first direction. The first and second flow channels are asymmetrically arranged about the first center line.

[0007] In one possible implementation, the plurality of first sub-slots have the same dimensions along the second direction; along the second direction, the dimensions of the second sub-slots near the middle position are different from the dimensions of the second sub-slots near the sides.

[0008] In one possible implementation, along the second direction, the dimension of the second sub-slot near the middle position along the second direction is larger than the dimension of the second sub-slots near the two sides along the second direction.

[0009] In one possible implementation, the plurality of first sub-slots have the same dimension along the second direction; the plurality of second sub-slots have the same dimension along the second direction.

[0010] In one possible implementation, the insulating element includes an explosion-proof section. The explosion-proof section has a groove, the opening of which is located on the first surface, and the groove is situated between the injection hole and the second flow guide groove. The bottom wall of the groove has a through hole that penetrates the second surface. The explosion-proof section is configured to be positioned opposite to the explosion-proof valve of the energy storage device.

[0011] In one possible implementation, the insulating member includes a first partition plate disposed within the first guide groove along the width direction of the insulating member, and spaced apart from two opposite sidewalls of the first guide groove along the length direction of the insulating member.

[0012] In one possible implementation, the insulating member has a second center line parallel to the length direction of the insulating member, and the distances from the second center line to the two opposite edges in the width direction of the insulating member are equal; a plurality of second sub-slots are symmetrically arranged about the second center line.

[0013] In one possible implementation, the insulating member includes a first connecting portion and a first flow guiding portion, wherein the first flow guiding portion, the first connecting portion, and the explosion-proof portion are sequentially connected along the first direction. The first flow guiding groove is disposed in the first flow guiding portion, and the injection hole is disposed in the first connecting portion; the first surface is planar, and the thickness of the first flow guiding portion is greater than or equal to the thickness of the first connecting portion.

[0014] In one possible implementation, the insulating member further includes a second connecting portion and a second flow guiding portion. The second connecting portion is connected to the side of the explosion-proof portion opposite to the first connecting portion, and the second flow guiding portion is connected to the side of the second connecting portion opposite to the explosion-proof portion. A second flow guiding groove is disposed in the second flow guiding portion. The thickness of the second flow guiding portion is greater than or equal to the thickness of the second connecting portion and the thickness of the first connecting portion.

[0015] In one possible implementation, the insulating member has a first through hole and a second through hole, both penetrating the first surface and the second surface along the thickness direction of the insulating member. The first through hole is located between the injection hole and the first guide groove, and is spaced apart from the injection hole and the first guide groove; the second through hole is located between the groove and the second guide groove, and is spaced apart from the groove and the second guide groove. The first through hole is used for the positive terminal of the energy storage device to pass through, and the second through hole is used for the negative terminal of the energy storage device to pass through. Alternatively, the first through hole is used for the negative terminal of the energy storage device to pass through, and the second through hole is used for the positive terminal of the energy storage device to pass through.

[0016] Secondly, this application provides an end cap assembly. The end cap assembly includes an end cap and the aforementioned insulating member. The end cap has a liquid injection through hole that penetrates the end cap along its thickness direction. Along the thickness direction of the end cap assembly, the insulating member is stacked and fixedly connected to the end cap, with its first surface facing the end cap. The liquid injection hole and the liquid injection through hole are opposite to each other and communicate with each other.

[0017] In one possible implementation, the end cap further includes an explosion-proof hole, which is spaced apart from the injection hole along the first direction. The end cap assembly also includes an explosion-proof valve disposed within the explosion-proof hole and fixedly connected to the inner wall of the explosion-proof hole. Along the thickness direction of the end cap assembly, the explosion-proof valve is positioned opposite the groove and spaced apart from the bottom wall of the groove.

[0018] In one possible implementation, the end cap further includes a first electrode through-hole and a second electrode through-hole, which are spaced apart along the first direction and along the thickness direction of the end cap assembly. The first electrode through-hole is opposite to and communicates with the first through-hole of the insulating element, and the second electrode through-hole is opposite to and communicates with the second through-hole of the insulating element. The end cap assembly also includes a first electrode and a second electrode, with the first electrode passing through the first electrode through-hole and the first through-hole, and the second electrode passing through the second electrode through-hole and the second through-hole.

[0019] Thirdly, this application provides an energy storage device. The energy storage device includes a housing, an electrode assembly, and an end cap assembly. The housing has an opening and a receiving cavity that communicates with the opening. The electrode assembly is disposed within the receiving cavity, and the end cap assembly covers the opening and is fixedly connected to the housing.

[0020] Fourthly, this application provides an electrical appliance. The electrical appliance includes the aforementioned energy storage device. The energy storage device is used to supply power to the electrical appliance.

[0021] In summary, the energy storage device provided in this application, by providing a first guiding groove on the insulating component and a first guiding hole within the first guiding groove, allows the electrolyte flowing between the insulating component and the end cap during the injection process to flow into the receiving cavity through the first guiding groove and the first guiding hole. This increases the injection speed and prevents some electrolyte from remaining on the first surface, thus avoiding electrolyte waste. Furthermore, by dividing the first guiding groove into multiple first sub-grooves, the electrolyte can flow simultaneously from multiple first sub-grooves into the interior of the energy storage device, further increasing the injection speed and making the electrolyte distribution within the energy storage device more uniform, thereby improving the wetting speed and effect of the electrode assembly. Moreover, by further providing a second guiding groove on the insulating component, when the electrolyte inside the energy storage device sloshes into the gap between the insulating component and the end cap due to transportation issues, the electrolyte can simultaneously flow back into the interior of the energy storage device from both the first and second guiding grooves, thereby increasing the electrolyte return speed. Attached Figure Description

[0022] To more clearly illustrate the technical solution 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 from these drawings without creative effort.

[0023] Figure 1 This is an application scenario diagram of the electrical equipment provided in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the energy storage device provided in the first embodiment of this application;

[0025] Figure 3 yes Figure 2 The diagram shows the exploded structure of the energy storage device.

[0026] Figure 4 yes Figure 2 An exploded view of the end cap assembly in the energy storage device shown.

[0027] Figure 5 yes Figure 4 A schematic diagram of the insulating component in the end cap assembly shown;

[0028] Figure 6 yes Figure 5 The diagram shows the structure of the insulating component from another angle;

[0029] Figure 7 yes Figure 5 A partial structural schematic diagram of the insulating component shown.

[0030] Figure 8 yes Figure 5 A schematic diagram of another part of the insulating component shown;

[0031] Figure 9 yes Figure 6 The diagram shows a cross-sectional view of the insulating component along the AA direction.

[0032] Figure 10 This is a partial structural schematic diagram of an insulating member provided in another embodiment of this application;

[0033] Figure 11 This is a partial structural schematic diagram of an insulating member provided in another embodiment of this application;

[0034] Figure 12 This is a schematic diagram of the structure of the insulating component in the energy storage device provided in the second embodiment of this application;

[0035] Figure 13 This is a schematic diagram of the structure of the insulating component in the energy storage device provided in the third embodiment of this application.

[0036] Reference numerals: Energy storage system 1000; Power conversion device 200; Wind power conversion device 210; First user load 220; Energy storage cabinet 230; Energy storage device 100; Housing 50; Receiving cavity 51; Electrode assembly 70; Electrode core 71; Positive electrode tab 711; Negative electrode tab 712; First connector 61; Second connector 62; End cap assembly 1; End cap 20; First upper plastic 31; Second upper plastic 32; Insulating component 10; First pole post 41; Second pole post 42; Explosion-proof valve 80; Top surface 21; Back surface 22; First pole Column through hole 23; Second pole column through hole 24; Explosion-proof hole 25; Liquid injection through hole 26; First surface 101; Second surface 102; First guide section 11; Seventh surface 111; Eighth surface 112; First guide groove 113; First side surface 1131; Second side surface 1132; Third side surface 1133; Fourth side surface 1134; First bottom surface 1135; First sub-groove 1136; First sub-groove 1137; Second partition 114; First partition 115; First guide hole 116; Second guide section 12; Ninth surface 121; 10th side 122; Second guide channel 123; Fifth side 1231; Sixth side 1232; Seventh side 1233; Eighth side 1234; Second bottom surface 1235; Third baffle 124; First third baffle 1241; Second third baffle 1242; Third third baffle 1243; Fourth third baffle 1244; Fourth baffle 125; Second sub-slot 126; First second sub-slot 1261; Second second sub-slot 1262; Third second sub-slot 1263; Fourth second sub-slot 1264 64; Fifth sub-slot 1265; Second sub-slot 127; Second guide hole 128; Explosion-proof part 13; Fifth surface 131; Sixth surface 132; Groove 133; First side wall 1331; Second side wall 1332; Bottom wall of the tank 1333; Through hole 134; First connecting part 14; First surface 141; Second surface 142; First through hole 143; Injection hole 144; Second connecting part 15; Third surface 151; Fourth surface 152; Second through hole 153; Hot melt column 16; Second center line P1; First center line P2. Detailed Implementation

[0037] 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.

[0038] 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 according to future application needs. As we all know, to achieve the grand goal of carbon neutrality, the main way to generate green electricity is to develop green energy sources such as photovoltaics and wind power to replace fossil fuels. Currently, the generation of green electricity generally relies on photovoltaics, wind power, and hydropower. However, wind and solar energy generally suffer from strong intermittency and large fluctuations, which can cause grid instability, insufficient electricity during peak demand periods, and excessive electricity 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. Energy storage involves converting electrical energy into other forms of energy through physical or chemical means and storing it. When needed, the stored energy is converted back into electrical energy and released. Simply put, energy storage is like a large "power bank". When there is sufficient solar and wind power, electrical energy is stored and the stored power is released when needed.

[0039] Taking electrochemical energy storage as an example, this solution provides an energy storage device. The energy storage device is equipped with a set of chemical batteries. It mainly uses the chemical elements in the chemical 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 batteries. When the use of external electrical energy reaches its peak, the stored electricity is released for use, or transferred to places with a shortage of electricity for use.

[0040] Current energy storage applications are quite widespread, including generation-side energy storage, grid-side energy storage, renewable energy grid-connected energy storage, and user-side energy storage. The corresponding types of energy storage devices include:

[0041] (1) Large energy storage containers used in grid-side energy storage scenarios can serve as high-quality active and reactive power regulation power sources in the grid, enabling load matching of electrical energy in time and space, enhancing the absorption capacity of renewable energy, and playing a significant role in grid system backup, alleviating peak load power supply pressure, and peak regulation and frequency regulation.

[0042] (2) Small and medium-sized energy storage cabinets used in commercial and industrial energy storage scenarios (banks, shopping malls, etc.) and small household energy storage boxes used in residential energy storage scenarios primarily operate under the "peak shaving and valley filling" mode. Because there are significant price differences in electricity consumption during peak and off-peak periods, users with energy storage devices typically charge the cabinets / boxes during off-peak hours to reduce costs; during peak hours, they release the stored electricity for use, thus saving on electricity bills. Furthermore, in remote areas and regions prone to natural disasters such as earthquakes and hurricanes, the existence of household energy storage devices effectively provides backup power for users and the power grid, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0043] Please see Figure 1 , Figure 1 This is an application scenario diagram of the electrical equipment provided in the embodiments of this application. The embodiments of this application take the home energy storage scenario in user-side energy storage as an example for illustration, and the energy storage device of this application is not limited to the home energy storage scenario.

[0044] This application provides a residential energy storage system 1000, which includes a power conversion device 200 (photovoltaic panel), a wind power conversion device 210 (windmill), a first user load 220 (base station), a second user load (not shown) (commercial / industrial side), and an energy storage device. The energy storage system 1000 also includes an energy storage cabinet 230, in which the energy storage device is installed for easy outdoor installation. Specifically, the power conversion device 200 can convert solar energy into electrical energy during periods of low electricity prices. The energy storage device stores this electrical energy and supplies it to the base station and commercial / industrial side during peak electricity prices, or provides power during power outages / outages. The wind power conversion device 210 (windmill) can convert wind energy into electrical energy. The energy storage device stores this electrical energy and supplies it to the base station and commercial / industrial side during peak electricity prices, or provides power during power outages / outages. The electrical energy can be transmitted via high-voltage cables.

[0045] Among them, energy storage cabinet 230 can be understood as electrical equipment. Energy storage devices can also be used in the form of energy storage containers, small and medium-sized energy storage cabinets, and small household energy storage boxes, etc., which contain energy storage devices. The aforementioned energy storage containers, small and medium-sized energy storage cabinets, and small household energy storage boxes, etc., which contain energy storage devices, can all be understood as electrical equipment.

[0046] It is understood that energy storage devices may include, but are not limited to, single-cell batteries, battery modules, battery packs, and battery systems. The actual application form of the energy storage device 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. This application embodiment only uses a multi-cell battery as an example for illustration.

[0047] Please see Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of the energy storage device 100 provided in the first embodiment of this application. Figure 3 yes Figure 2 The exploded structure diagram of the energy storage device 100 shown.

[0048] For ease of description, in this application, the length direction of the energy storage device 100 is designated as the first direction, i.e., the X direction; the width direction of the energy storage device 100 is designated as the second direction, i.e., the Y direction; and the thickness direction of the energy storage device 100 is designated as the third direction, i.e., the Z direction. The X, Y, and Z directions are mutually perpendicular.

[0049] The energy storage device 100 includes a housing 50, an end cap assembly 1, an electrode assembly 70, an electrolyte, a first connector 61, and a second connector 62. The housing 50 has a receiving cavity 51, the opening of which is located on one side of the housing 50 in the height direction. The electrode assembly 70 and the electrolyte are located within the receiving cavity 51, with the electrode assembly 70 immersed in the electrolyte. The electrode assembly 70 includes multiple electrode cores 71. The multiple electrode cores 71 are arranged side-by-side along the width direction (Y direction) of the energy storage device 100. Each electrode core 71 includes a positive electrode tab 711 and a negative electrode tab 712. The end cap assembly 1 is mounted on the open side of the housing 50 and fixedly connected to the housing 50 to close the receiving cavity 51. The first connector 61 connects the positive electrode tab 711 and the positive terminal of the end cap assembly 1, and the second connector 62 connects the negative electrode tab 712 and the negative terminal of the end cap assembly 1.

[0050] In this embodiment, the outer side of the electrode assembly 70 is also covered with an insulating film (not shown) to protect the electrode core 71 and prevent it from being scratched. The insulating film covers the outer surface of the electrode assembly 70, and the sides of the insulating film are thermally bonded to the end cap assembly 1.

[0051] Please see Figure 4 , Figure 4 yes Figure 2 An exploded view of the end cap assembly 1 in the energy storage device 100 shown.

[0052] The end cap assembly 1 includes an end cap 20, a first upper plastic 31, a second upper plastic 32, an insulating component 10, a first electrode post 41, a second electrode post 42, and an explosion-proof valve 80. In this embodiment, the end cap 20 is a rectangular thin plate. In other embodiments, the end cap 20 may also be a circular plate, an elliptical plate, or other irregularly shaped plates. In this embodiment, the end cap 20 is a plain aluminum component. The end cap 20 includes a top surface 21 and a back surface 22. The top surface 21 and the back surface 22 are arranged opposite to each other along the Z direction. The end cap 20 is provided with a first electrode post through hole 23, a second electrode post through hole 24, an explosion-proof hole 25, and a liquid injection through hole 26. Along the length direction of the end cap 20, that is, along the X direction, the first electrode post through hole 23, the liquid injection through hole 26, the explosion-proof hole 25, and the second electrode post through hole 24 are arranged alternately in sequence. Furthermore, the first electrode through hole 23, the liquid injection through hole 26, the explosion-proof hole 25, and the second electrode through hole 24 all penetrate the top surface 21 and the back surface 22 along the Z direction.

[0053] The first electrode post 41 passes through the first electrode post through hole 23. A first upper plastic sleeve 31 is fitted around the outer periphery of the first electrode post 41 and is disposed on the top surface 21 of the end cap 20, and is fixedly connected to the end cap 20. The first electrode post 41 is insulated from the end cap 20 through the first upper plastic sleeve 31. The second electrode post 42 passes through the second electrode post through hole 24. A second upper plastic sleeve 32 is fitted around the outer periphery of the second electrode post 42 and is disposed on the top surface 21 of the end cap 20, and is fixedly connected to the end cap 20. The second electrode post 42 is insulated from the end cap 20 through the second upper plastic sleeve 32. In this embodiment, the first electrode post 41 is a positive electrode post, and the second electrode post 42 is a negative electrode post. In other embodiments, the first electrode post 41 may also be a negative electrode post, and the second electrode post 42 may be a positive electrode post.

[0054] An explosion-proof valve 80 is installed in the explosion-proof port 25 and fixedly connected to the end cap 20. For example, the explosion-proof valve 80 is welded to the inner wall of the explosion-proof port 25. When the internal pressure of the energy storage device 100 becomes excessive, the explosion-proof valve 80 automatically opens to release pressure, preventing the energy storage device 100 from exploding and improving the safety performance of the energy storage device 100.

[0055] The electrolyte injection port 26 is located between the explosion-proof valve 80 and the first pole 41. During the electrolyte injection process of the energy storage device 100, electrolyte is injected into the energy storage device 100 through the electrolyte injection port 26.

[0056] Please combine Figure 5 and Figure 6 , Figure 5 yes Figure 4 The diagram shows the structure of the insulating element 10 in the end cap assembly 1. Figure 6 yes Figure 5 The schematic diagram of the insulating component 10 at another angle is shown.

[0057] The insulating component 10 is the lower plastic part of the energy storage device 100. In this embodiment, the insulating component 10 is generally rectangular and thin. The insulating component 10 is made of insulating material. For example, the insulating component 10 is made of plastic or rubber, or it may be made of other insulating materials.

[0058] The insulating component 10 includes a first flow guiding portion 11, a second flow guiding portion 12, an explosion-proof portion 13, a first connecting portion 14, and a second connecting portion 15. Along the length of the insulating component 10, the first flow guiding portion 11, the first connecting portion 14, the explosion-proof portion 13, the second connecting portion 15, and the second flow guiding portion 12 are connected sequentially. The first connecting portion 14 includes a first surface 141 and a second surface 142. The first surface 141 and the second surface 142 are arranged opposite to each other along the thickness direction of the insulating component 10. The first connecting portion 14 is provided with a first through hole 143 and a liquid injection hole 144. The first through hole 143 and the liquid injection hole 144 are spaced apart along the X direction and penetrate the first surface 141 and the second surface 142. The liquid injection hole 144 is located on the side of the first through hole 143 closest to the explosion-proof portion 13, that is, the liquid injection hole 144 is located between the first through hole 143 and the explosion-proof portion 13. The liquid injection hole 144 is correspondingly provided with the liquid injection through hole 26. In the electrolyte injection process of the energy storage device 100, the electrolyte flows into the receiving cavity 51 of the housing 50 through the injection through hole 26 and the injection hole 144 to wet the electrode assembly 70. The first through hole 143 is correspondingly provided with the first electrode post through hole 23. The first electrode post 41 passes through the first electrode post through hole 23 and the first through hole 143 and is connected to the first connector 61.

[0059] The second connecting portion 15 includes a third surface 151 and a fourth surface 152. The third surface 151 and the fourth surface 152 are arranged opposite to each other along the thickness direction of the insulating member 10. The second connecting portion 15 is connected to the side of the first connecting portion 14 facing away from the explosion-proof part 13, and the third surface 151 is flush with the first surface 141, and the fourth surface 152 is flush with the second surface 142. In this embodiment, the thickness of the first connecting portion 14 and the second connecting portion 15 is the same or approximately the same. The second connecting portion 15 is provided with a second through hole 153. The second through hole 153 penetrates the third surface 151 and the fourth surface 152 along the Z direction. The second through hole 153 is correspondingly arranged with the second pole post through hole 24. The second pole post 42 passes through the second pole post through hole 24 and the second through hole 153, and is connected to the second connecting member 62.

[0060] The explosion-proof part 13 includes a fifth surface 131 and a sixth surface 132. The fifth surface 131 and the sixth surface 132 are arranged opposite to each other along the thickness direction of the insulating member 10. The explosion-proof part 13 is connected between the first connecting part 14 and the second connecting part 15, and is arranged opposite to the explosion-proof valve 80 along the Z direction. The fifth surface 131 is flush with the first surface 141 and the third surface 151, and the sixth surface 132 protrudes from the second surface 142 and the fourth surface 152. It is understood that the thickness of the explosion-proof part 13 is greater than the thickness of the first connecting part 14 and the second connecting part 15. That is, the dimension of the explosion-proof part 13 along the Z direction is greater than the dimension of the first connecting part 14 along the Z direction and the dimension of the second connecting part 15 along the Z direction, to improve the strength of the insulating member 10. Alternatively, the sixth surface 132 may also be flush with the second surface 142 and the fourth surface 152, and the thickness of the explosion-proof part 13 may be the same as the thickness of the first connecting part 14 and the second connecting part 15.

[0061] The explosion-proof part 13 is provided with a groove 133. The opening of the groove 133 is located on the fifth surface 131 and recessed towards the sixth surface 132. The groove 133 includes a first sidewall 1331, a second sidewall 1332, and a bottom wall 1333. The first sidewall 1331 and the second sidewall 1332 are arranged opposite to each other along the X direction. In this embodiment, both the first sidewall 1331 and the second sidewall 1332 are inclined surfaces. Along the direction from the sixth surface 132 to the fifth surface 131, the distance between the first sidewall 1331 and the second sidewall 1332 gradually increases. That is, along the direction from the sixth surface 132 to the fifth surface 131, the size of the groove 133 along the X direction gradually increases.

[0062] The bottom wall 1333 of the tank is provided with through holes 134. The through holes 134 penetrate the bottom wall 1333 and the sixth surface. There are multiple through holes 134. These multiple through holes 134 are arranged in an array along the X and Y directions. In this embodiment, the bottom wall 1333 has two rows of through holes 134, which are spaced apart along the X direction. Each row includes eight through holes 134 spaced apart along the X direction. In other embodiments, the through holes 134 can be in one row, three rows, or more. The number of through holes 134 in each row can be greater than eight or less than eight, and the number of through holes 134 in each row can be the same or different. Alternatively, the multiple through holes 134 can be randomly arranged on the bottom wall 1333; no specific restrictions are placed on the arrangement of the through holes 134 here.

[0063] Please combine Figure 7 , Figure 7 yes Figure 5 A partial structural schematic diagram of the insulating component 10 shown.

[0064] The first flow guide 11 includes a seventh surface 111 and an eighth surface 112. The seventh surface 111 and the eighth surface 112 are arranged opposite to each other along the thickness direction of the insulating member 10. The first flow guide 11 is connected to the side of the first connecting portion 14 facing away from the explosion-proof portion 13. The seventh surface 111 is flush with the fifth surface 131, the first surface 141, and the third surface 151, while the eighth surface 112 protrudes from the second surface 142. It can be understood that the thickness of the first flow guide 11 is greater than the thickness of the first connecting portion 14. That is, the dimension of the first flow guide 11 along the Z direction is greater than the dimension of the first connecting portion 14 along the Z direction, so as to further improve the strength of the insulating member 10. Alternatively, the eighth surface 112 may also be flush with the second surface 142 and the fourth surface 152, and the thickness of the first flow guide 11 may be the same as the thickness of the first connecting portion 14 and the second connecting portion 15.

[0065] The first guide section 11 is provided with a first guide groove 113. The opening of the first guide groove 113 is located on the seventh surface 111 and is recessed towards the eighth surface 112. The first guide groove 113 includes a first side surface 1131, a second side surface 1132, a third side surface 1133, a fourth side surface 1134, and a first bottom surface 1135. The first side surface 1131, the second side surface 1132, the third side surface 1133, and the fourth side surface 1134 are connected end to end and are arranged around the first bottom surface 1135. The first side surface 1131 and the third side surface 1133 are arranged opposite each other along the X direction. The second side surface 1132 and the fourth side surface 1134 are arranged opposite each other along the Y direction and are connected between the first side surface 1131 and the third side surface 1133.

[0066] The first flow guide section 11 also includes a second partition 114 and a first partition 115. Both the second partition 114 and the first partition 115 are disposed within the first flow guide groove 113 and connected to the inner wall of the first flow guide groove 113. The second partition 114 and the first partition 115 serve a reinforcing function, increasing the strength of the first flow guide section 11, thereby improving the structural strength of the insulating component 10.

[0067] The second partition 114 extends parallel to the X-direction. It is perpendicularly connected to the first bottom surface 1135 and spaced apart from the second side surface 1132 and the fourth side surface 1134. The opposite ends of the second partition 114 along its length are connected to the first side surface 1131 and the third side surface 1133, respectively. Multiple second partitions 114 are arranged at intervals along the Y-direction, with equal distances between adjacent partitions. This means the multiple second partitions 114 divide the first flow channel 113 into multiple first sub-channels 1136 arranged at intervals along the Y-direction. The multiple first sub-channels 1136 have the same or approximately the same dimensions. That is, the multiple first sub-channels 1136 have the same length and width. In this embodiment, the first flow guide 11 includes three second partitions 114. These three second partitions 114 are arranged at intervals along the Y-direction, dividing the first flow channel 113 into four first sub-channels 1136 of the same size. In other embodiments, the number of second partitions 114 may also be two, four, or more than five.

[0068] The first partition 115 extends parallel to the Y-direction. The first partition 115 is perpendicularly connected to the first bottom surface 1135 and is spaced apart from the first side surface 1131 and the third side surface 1133. The opposite ends of the first partition 115 along its length are connected to the second side surface 1132 and the fourth side surface 1134, respectively. In this embodiment, there is one first partition 115. The first partition 115 divides each first sub-slot 1136 into two first sub-slots 1137. In other embodiments, there may be multiple first partitions 115. When there are multiple first partitions 115, the multiple first partitions 115 are spaced apart along the X-direction. In this embodiment, the distance from the first partition 115 to the first side surface 1131 is equal to the distance from the first partition 115 to the second side surface 1132. The two first sub-slots 1137 in each first sub-slot 1136 are of equal size.

[0069] Understandably, the second partition 114 and the first partition 115 divide the first guide channel 113 into multiple first sub-slots 1137. Each first sub-slot 1137 has the same or approximately the same size. The multiple first sub-slots 1137 are arranged in an array along the X and Y directions. Specifically, the multiple first sub-slots 1137 are arranged in two rows along the X direction, with each row including four first sub-slots 1137. For example, the width of each first sub-slot 1137 is 4.5 mm, that is, its dimension along the X direction is 4.5 mm; the length of each first sub-slot 1137 is 14.0 mm, that is, its dimension along the Y direction is 14.0 mm.

[0070] like Figure 7As shown, the first flow guiding section 11 is also provided with a first flow guiding hole 116. There are multiple first flow guiding holes 116. Each first sub-slot 1137 has a first flow guiding hole 116 on its bottom wall. The first flow guiding hole 116 penetrates the bottom wall of the first sub-slot 1137 and the eighth surface 112. That is, the first flow guiding hole 116 connects the first flow guiding channel 113 and the receiving cavity 51 of the housing 50. The electrolyte entering the first flow guiding channel 113 can flow into the receiving cavity 51 through the first flow guiding hole 116.

[0071] Please see Figure 8 and Figure 9 , Figure 8 yes Figure 5 Another structural schematic diagram of the insulating component 10 shown. Figure 9 yes Figure 6 The schematic diagram shows the cross-sectional structure of the insulating component 10 along the AA direction.

[0072] The second flow guide 12 includes a ninth surface 121 and a tenth surface 122. The ninth surface 121 and the tenth surface 122 are arranged opposite to each other along the thickness direction of the insulating member 10. The second flow guide 12 is connected to the side of the second connecting portion 15 facing away from the explosion-proof portion 13. The ninth surface 121 is flush with the fifth surface 131, the first surface 141, the third surface 151, and the eighth surface 112, and together they form the first surface 101 of the insulating member 10. The tenth surface 122, the sixth surface 132, the second surface 142, the fourth surface 152, and the eighth surface 112 together form the second surface 102 of the insulating member 10. In this embodiment, the tenth surface 122 protrudes beyond the fourth surface 152. It is understood that the thickness of the second flow guide 12 is greater than the thickness of the second connecting portion 15. That is, the dimension of the second flow guide 12 along the Z direction is greater than the dimension of the second connecting portion 15 along the Z direction. Alternatively, the tenth surface 122 can be flush with the fourth surface 152, and the thickness of the second guide portion 12 can be the same as the thickness of the second connecting portion 15 and the first connecting portion 14.

[0073] In this embodiment, the first surface 101 and the second surface 102 are arranged opposite to each other along the thickness direction of the insulating member 10. The first surface 101 is a plane, and the second surface 102 includes a fourth surface 152 and a sixth surface 132 arranged flush with each other, as well as a second surface 142, an eighth surface 112 and a tenth surface 122 protruding from the fourth surface 152.

[0074] The second guide section 12 is provided with a second guide groove 123. The opening of the second guide groove 123 is located on the ninth surface 121 and is recessed towards the tenth surface 122. The second guide groove 123 includes a fifth side surface 1231, a sixth side surface 1232, a seventh side surface 1233, an eighth side surface 1234, and a second bottom surface 1235. The fifth side surface 1231, the sixth side surface 1232, the seventh side surface 1233, and the eighth side surface 1234 are connected end to end and are arranged around the second bottom surface 1235. The fifth side surface 1231 and the seventh side surface 1233 are arranged opposite each other along the X direction. The sixth side surface 1232 and the eighth side surface 1234 are arranged opposite each other along the Y direction and are connected between the fifth side surface 1231 and the seventh side surface 1233.

[0075] The second flow guide section 12 also includes a third partition 124 and a fourth partition 125. Both the third partition 124 and the fourth partition 125 are disposed within the second flow guide groove 123 and connected to the inner wall of the second flow guide groove 123. The third partition 124 and the fourth partition 125 serve a reinforcing function, increasing the strength of the second flow guide section 12, thereby improving the structural strength of the insulating component 10.

[0076] The third partition 124 extends parallel to the X-direction. It is perpendicularly connected to the second bottom surface 1235 and spaced apart from the sixth side surface 1232 and the eighth side surface 1234. The opposite ends of the third partition 124 along its length are connected to the fifth side surface 1231 and the seventh side surface 1233, respectively. Multiple third partitions 124 are arranged at intervals along the Y-direction, dividing the second guide channel 123 into multiple second sub-channels 126 arranged at intervals along the Y-direction.

[0077] Combination Figure 6 The insulating member 10 has a first center line P2 and a second center line P1. The first center line P2 is parallel to the width direction of the insulating member 10, that is, parallel to the Y direction. Furthermore, the distances from the first center line P2 to the two opposite edges of the insulating member 10 in the length direction are equal.

[0078] In this embodiment, the first guide groove 113 and the second guide groove 123 are asymmetrically arranged about the first center line P2. The plurality of first sub-grooves 1136 have the same dimension along the Y direction. Along the width direction of the insulating member 10, i.e., along the Y direction, the length of the second sub-grooves 126 located in the middle position is different from the length of the second sub-grooves 126 located on both sides. The length of the second sub-grooves 126 refers to its dimension along the Y direction. Specifically, along the width direction of the insulating member 10, the length of the second sub-grooves 126 located in the middle position is greater than the length of the second sub-grooves 126 located on both sides.

[0079] like Figure 6 and Figure 8As shown, in this embodiment, multiple second sub-slots 126 are symmetrically arranged about the second center line P1. Exemplarily, there are three third partitions 124. The first third partition 1241, the second third partition 1242, and the third third partition 1243 are sequentially spaced along the sixth side 1232 to the eighth side 1234, dividing the first guide channel 113 into a first second sub-slot 1261, a second second sub-slot 1262, a third second sub-slot 1263, and a fourth second sub-slot 1264, sequentially spaced along the sixth side 1232 to the eighth side 1234.

[0080] In this embodiment, the distance between the second third partition 1242 and the first third partition 1241 is greater than the distance between the first third partition 1241 and the sixth side 1232, and the distance between the second third partition 1242 and the third third partition 1243 is greater than the distance between the third third partition 1243 and the eighth side 1234. The length of the second second sub-slot 1262 is greater than the length of the first second sub-slot 1261 and the length of the fourth second sub-slot 1264, and the length of the third second sub-slot 1263 is greater than the length of the fourth second sub-slot 1264 and the length of the first second sub-slot 1261. In this embodiment, the second second sub-slot 1262 and the third second sub-slot 1263 are symmetrically arranged about the second center line P1, and the first second sub-slot 1261 and the fourth second sub-slot 1264 are also symmetrically arranged about the second center line P1. The length of the second second sub-slot 1262 is the same as the length of the third second sub-slot 1263, and the length of the first second sub-slot 1261 is the same as the length of the fourth second sub-slot 1264.

[0081] For example, the lengths of the second sub-slot 1262 and the third sub-slot 1263 are 18.0 mm, and the lengths of the first sub-slot 1261 and the fourth sub-slot 1264 are 5.0 mm. In other embodiments, the lengths of the second sub-slot 1262 and the third sub-slot 1263 may also be different.

[0082] In one implementation, such as Figure 10 As shown, when there are two third partitions 124, there are three second sub-slots 126. The distance between the first third partition 1241 and the second third partition 1242 is greater than the distance between the first third partition 1241 and the sixth side 1232, and also greater than the distance between the second third partition 1242 and the eighth side 1234. The length of the second sub-slot 1262 is greater than the length of the first second sub-slot 1261 and the length of the second sub-slot 1262. That is, along the width direction of the insulating member 10, the length of the second sub-slot 126 located in the middle position is greater than the length of the second sub-slots 126 located on both sides.

[0083] In one implementation, such as Figure 11 As shown, when there are four third partitions 124, there are five second sub-slots 126. The distance between the second third partition 1242 and the third third partition 1243 is greater than the distance between the second third partition 1242 and the first third partition 1241, and greater than the distance between the third third partition 1243 and the fourth third partition 1244. Simultaneously, the distance between the second third partition 1242 and the first third partition 1241 is greater than the distance between the first third partition 1241 and the sixth side 1232, and the distance between the third third partition 1243 and the fourth third partition 1244 is greater than the distance between the fourth third partition 1244 and the eighth side 1234. The length of the third second sub-slot 1263 is greater than the lengths of the second second sub-slot 1262 and the fourth second sub-slot 1264; the length of the second second sub-slot 1262 is greater than the length of the first second sub-slot 1261; and the length of the fourth second sub-slot 1264 is greater than the length of the fifth second sub-slot 1265. That is, along the width direction of the insulating member 10, the length of the second sub-slot 126 located in the middle position is greater than the length of the second sub-slots 126 located on both sides. In other embodiments, the number of third partitions 124 may also be five or more.

[0084] Please continue reading. Figure 8 and Figure 9 The fourth partition 125 extends parallel to the Y-direction. The fourth partition 125 is perpendicularly connected to the second bottom surface 1235 and is spaced apart from the fifth side surface 1231 and the seventh side surface 1233. The opposite ends of the fourth partition 125 along its length are connected to the sixth side surface 1232 and the eighth side surface 1234, respectively. In this embodiment, there is one fourth partition 125. The fourth partition 125 divides each second sub-slot 126 into two second sub-slots 127. In other embodiments, there may be multiple fourth partitions 125. When there are multiple fourth partitions 125, they are spaced apart along the X-direction. In this embodiment, the distance from the fourth partition 125 to the fifth side surface 1231 is equal to the distance from the fourth partition 125 to the sixth side surface 1232. The two second sub-slots 127 in each second sub-slot 126 are of equal size.

[0085] It is understood that the third partition 124 and the fourth partition 125 divide the second guide channel 123 into multiple second sub-slots 127. Each second sub-slot 127 has the same or approximately the same size. The multiple second sub-slots 127 are arranged in an array along the X and Y directions. Specifically, the multiple second sub-slots 127 are arranged in two rows along the X direction, each row including four second sub-slots 127. In this embodiment, each second sub-slot 127 has the same width, and along the width direction of the insulating member 10, the length of the second sub-slot 127 located in the middle position is greater than the length of the second sub-slots 127 located on both sides. For example, the width of each second sub-slot 127 is 4.5 mm, that is, the dimension along the X direction is 4.5 mm. The length of the first sub-slot 1137 located in the middle position along the width direction of the insulating member 10 is 18.0 mm, and the length of the second sub-slots 127 located on both sides along the width direction of the insulating member 10 is 5.0 mm. That is, Figure 5 In the second sub-slot 1262, the length of the second sub-slot 127 is 18.0 mm, and the length of the second sub-slot 127 in the first sub-slot 1261 and the length of the second sub-slot 127 in the fourth sub-slot 1264 is 5.0 mm.

[0086] like Figure 8 and Figure 9 As shown, the second flow guide section 12 is also provided with a second flow guide hole 128. There are multiple second flow guide holes 128. Each second sub-slot 127 has a second flow guide hole 128 on its bottom wall. The second flow guide hole 128 penetrates the bottom wall of the second sub-slot 127 and the tenth surface 122. That is, the second flow guide hole 128 connects the second flow guide channel 123 and the receiving cavity 51 of the housing 50. The electrolyte entering the second flow guide channel 123 can flow into the receiving cavity 51 through the second flow guide hole 128.

[0087] like Figure 3 and Figure 4 As shown, the insulating member 10 and the end cap 20 are stacked along the Z direction and fixedly connected to the end cap 20. The first surface 101 faces the back surface 22 of the end cap 20, and the first surface 101 is fixedly connected to the back surface 22. In this embodiment, the insulating member 10 and the end cap 20 are fixedly connected by heat fusion.

[0088] Combination Figure 5The first surface 101 is provided with heat-fusion pillars 16, and the back surface 22 is provided with heat-fusion points corresponding to the heat-fusion pillars 16. The heat-fusion pillars 16 are heat-fused to the top cover at the heat-fusion points. There are multiple heat-fusion pillars 16. Multiple heat-fusion pillars 16 are arranged at intervals on the first surface 101. In this embodiment, there are eight heat-fusion pillars 16. The first connecting part 14 and the second connecting part 15 are each provided with four heat-fusion pillars 16. The four heat-fusion pillars 16 located in the first connecting part 14 are arranged in a square or rectangular shape, of which two heat-fusion pillars 16 are located between the first through hole 143 and the explosion-proof part 13, and the other two heat-fusion pillars 16 are located between the first through hole 143 and the first guide part 11. The four heat-fusion pillars 16 located in the second connecting part 15 are arranged in a square or rectangular shape, of which two heat-fusion pillars 16 are located between the second through hole 153 and the explosion-proof part 13, and the other two heat-fusion pillars 16 are located between the second through hole 153 and the first guide part 11. In other embodiments, the number of hot melt columns 16 may also be two, three, four, six, or nine or more.

[0089] In this embodiment, by providing heat-fusion pillars 16 on the insulating member 10 and achieving heat-fusion connection between the insulating member 10 and the end cap 20 through the heat-fusion pillars 16, the connection method between the insulating member 10 and the end cap 20 can be simplified, and the structure of the energy storage device 100 can be simplified. Furthermore, in this embodiment, by providing multiple heat-fusion pillars 16 on the insulating member 10 and arranging the multiple heat-fusion pillars 16 at intervals, the insulating member 10 and the end cap 20 are fixedly connected at multiple points, thereby improving the connection stability between the insulating member 10 and the end cap 20.

[0090] The first through hole 143 and the first pole post through hole 23 are arranged opposite to each other along the Z direction and are interconnected. The first pole post 41 passes through the first pole post through hole 23 and the first through hole 143 and is connected to the first connector 61. The second through hole 153 and the second pole post through hole 24 are arranged opposite to each other along the Z direction and are interconnected. The second pole post 42 passes through the second pole post through hole 24 and the second through hole 153 and is connected to the second connector 62.

[0091] The explosion-proof valve 80 and the explosion-proof part 13 are arranged opposite each other along the Z direction. The opening of the groove 133 faces the explosion-proof valve 80, and the bottom wall 1333 of the groove 133 is spaced apart from the explosion-proof valve 80. When the pressure inside the energy storage device 100 is too high, the pressurized gas in the receiving cavity 51 will enter the groove 133 through the through hole 134 provided in the bottom wall 1333 of the groove 133, and then impact the explosion-proof valve 80, causing the explosion-proof valve 80 to open and release pressure, thereby preventing the energy storage device 100 from exploding and improving the safety performance of the energy storage device 100. In this embodiment, by providing multiple through holes 134 in the bottom wall 1333 of the groove 133, the pressurized gas generated in the receiving cavity 51 can smoothly enter the groove 133 through the through holes 134 and impact the explosion-proof valve 80. Furthermore, in this embodiment, by providing a groove 133 in the insulating component 10 and spacing the explosion-proof valve 80 from the bottom wall 1333 of the groove 133, a larger ventilation space can be formed between the insulating component 10 and the explosion-proof valve 80, and the contact area between the pressurized gas and the explosion-proof valve 80 can be increased, thereby increasing the pressure on the explosion-proof valve 80, enabling the explosion-proof valve 80 to open normally to release pressure, and further improving the safety performance of the energy storage device 100.

[0092] like Figure 4 As shown, the injection hole 144 and the injection through hole 26 are arranged opposite to each other along the Z direction and are interconnected. In the injection process of the energy storage device 100, the electrolyte flows into the receiving cavity 51 of the housing 50 through the injection through hole 26 and the injection hole 144 to wet the electrode assembly 70. It should be noted that, due to the high flow rate of the electrolyte in the injection process of the energy storage device 100, some electrolyte will splash onto the surface of the insulating member 10 facing the end cover 20, that is, onto the first surface 101. This will cause liquid accumulation on the surface of the insulating member 10 or in the guide groove or recess provided on the first surface 101, resulting in the electrolyte failing to fully react with the active material inside the electrode assembly, thus wasting the electrolyte.

[0093] In this embodiment, by providing a first flow guide groove 113 on the insulating member 10 and a first flow guide hole 116 within the first flow guide groove 113, the electrolyte flowing between the insulating member 10 and the end cap 20 during the injection process can flow into the receiving cavity 51 through the first flow guide groove 113 and the first flow guide hole 116. This increases the injection speed and prevents some electrolyte from remaining on the first surface 101, thus avoiding waste. Furthermore, in this embodiment, by providing an injection hole 144 between the first flow guide groove 113 and the groove 133, the electrolyte flowing between the insulating member 10 and the end cap 20 during the injection process can simultaneously flow into the receiving cavity 51 through the groove 133 and the through hole 134. This increases the speed at which the electrolyte flows into the energy storage device 100, thereby increasing the injection speed.

[0094] In this embodiment, by dividing the first guide channel 113 into multiple first sub-channels 1136 arranged along the Y direction, and further dividing each first sub-channel 1136 into multiple first sub-channels 1137 arranged along the X direction, the electrolyte can simultaneously enter the receiving cavity 51 from the multiple first sub-channels 1137 and the first guide holes 116 provided in each first sub-channel 1137. This further increases the flow rate into the energy storage device 100 and the injection speed. Furthermore, in this embodiment, by arranging the multiple first sub-channels 1137 sequentially along the Y direction, and ensuring that each first sub-channel 1137 has the same size along the Y direction, the electrolyte is more evenly distributed within the receiving cavity 51, thereby improving the wetting speed and effect of the electrode assembly 70.

[0095] It should be noted that during the assembly and transportation of the energy storage device 100, the electrolyte inside the energy storage device 100 may shake due to transportation issues, causing the electrolyte to enter the gap between the insulating component 10 and the end cap 20. Part of the electrolyte that enters the gap between the insulating component 10 and the end cap 20 from the receiving cavity 51 flows back into the receiving cavity 51 through the first guide groove 113 and the first guide hole 116; part of the electrolyte flows back into the receiving cavity 51 through the groove 133 and the through hole 134; and part of the electrolyte flows back into the receiving cavity 51 through the second guide groove 123 and the second guide hole 128.

[0096] In this embodiment, by providing a first guide groove 113 and a second guide groove 123 on opposite sides of the length direction of the insulating member 10, the speed at which the electrolyte flows back into the energy storage device 100 can be increased, and the electrolyte can be prevented from remaining on the first surface 101, thus avoiding waste of the electrolyte.

[0097] Meanwhile, in this embodiment, by setting the first sidewall 1331 and the second sidewall 1332 of the groove 133 as inclined surfaces, the electrolyte between the insulating member 10 and the end cap 20 can flow smoothly along the first sidewall 1331 and the second sidewall 1332 into the groove 133 and into the energy storage device 100, thereby improving the electrolyte return rate. That is, most or all of the electrolyte can be returned to the interior of the energy storage device 100, reducing or even avoiding electrolyte residue, and thus improving the utilization rate of the electrolyte.

[0098] It should be further explained that during the long-term storage of the energy storage device 100, the middle region along the width direction of the insulating member 10 will bend inwards towards the interior of the energy storage device 100 due to gravity, that is, collapse in the negative Z-axis direction, which will lead to an increase in the gap between the middle region of the insulating member 10 and the end cap 20. When the electrolyte inside the energy storage device 100 is shaken due to transportation problems, it will enter the gap between the insulating member 10 and the end cap 20, with most of the electrolyte concentrated in the middle region of the insulating member 10 in the width direction.

[0099] In this embodiment, by dividing the second guide channel 123 into a plurality of second sub-channels 126 arranged along the Y direction, and the size of the second sub-channel 126 located in the middle of the second guide channel 123 is larger than the size of the second sub-channels 126 located on both sides, the electrolyte concentrated in the middle region of the width direction of the insulating member 10 can flow back to the energy storage device 100 through the larger second sub-channels 126, thereby increasing the speed at which the electrolyte flows back to the energy storage device 100, and further preventing the electrolyte from remaining on the first surface 101, thus further avoiding waste of the electrolyte.

[0100] The energy storage device 100 provided in this application embodiment provides a first guide groove 113 and a second guide groove 123 on opposite sides of the insulating member 10 along its length. The first guide groove 113 has multiple first sub-grooves 1136 of the same size, and the second sub-grooves 126 in the middle of the second guide groove 123 has a larger size than the second sub-grooves 126 on both sides. This ensures the flow rate and uniformity of the electrolyte entering between the insulating member 10 and the end cap 20 into the energy storage device 100 during the electrolyte injection process, while also improving the return flow rate of the electrolyte entering between the insulating member 10 and the end cap 20 into the energy storage device 100 during the transportation of the energy storage device 100.

[0101] Please see Figure 12 , Figure 12 This is a schematic diagram of the structure of the insulating component 10 in the energy storage device 100 provided in the second embodiment of this application.

[0102] In this embodiment, the insulating element 10 and Figure 6 The difference in the insulating member 10 in the illustrated embodiment is that, in this embodiment, the dimension of the second sub-groove 126 located in the middle position along the Y direction is smaller than the dimension of the second sub-groove 126 located on both sides along the Y direction.

[0103] Please see Figure 13 , Figure 13 This is a schematic diagram of the structure of the insulating component 10 in the energy storage device 100 provided in the third embodiment of this application.

[0104] In this embodiment, the insulating element 10 and Figure 6 The difference in the insulating member 10 shown in the embodiment is that, in this embodiment, the first guide groove 113 and the second guide groove 123 are symmetrically arranged about the first center line P2. The multiple first sub-grooves 1136 have the same dimension along the Y direction, and the multiple second sub-grooves 126 have the same dimension along the Y direction. This simplifies the structure of the insulating member 10 and reduces its production cost.

[0105] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An insulating member for an energy storage device, characterized by, The insulating component includes a first surface and a second surface, which are disposed opposite to each other along the thickness direction of the insulating component; The insulating component is provided with a first flow guide groove, a liquid injection hole, and a second flow guide groove; the first flow guide groove, the liquid injection hole, and the second flow guide groove are arranged sequentially at intervals along a first direction; the openings of the first flow guide groove and the second flow guide groove are both located on the first surface, and the liquid injection hole penetrates the first surface and the second surface along the thickness direction of the insulating component; The first guide channel includes a plurality of first sub-channels spaced apart along the second direction. Each first sub-channel has at least one first guide hole on its bottom wall, and the first guide hole penetrates the bottom wall of the first sub-channel. The second guide channel includes a plurality of second sub-channels spaced apart along the second direction, and each second sub-channel has at least one second guide hole on its bottom wall, the second guide hole penetrating the bottom wall of the second sub-channel; The multiple first sub-slots have the same dimension along the second direction; Along the second direction, the dimension of the second sub-slot near the middle position along the second direction is larger than the dimension of the second sub-slot near both sides along the second direction; The insulating component is further provided with a first through hole and a second through hole, both of which penetrate the first surface and the second surface along the thickness direction of the insulating component; the first through hole and the second through hole are disposed between the first flow guide groove and the second flow guide groove; the first through hole is used for the positive terminal of the energy storage device to pass through, and the second through hole is used for the negative terminal of the energy storage device to pass through; or, the first through hole is used for the negative terminal of the energy storage device to pass through, and the second through hole is used for the positive terminal of the energy storage device to pass through. The first surface is provided with a plurality of hot melt pillars, which are arranged at intervals on the first surface. At least some of the hot melt pillars are located between the first flow guide groove and the first through hole, and at least some of the hot melt pillars are located between the second flow guide groove and the second through hole. Wherein, the first direction is perpendicular to the second direction.

2. The insulator of claim 1, wherein The insulating component includes an explosion-proof part, which has a groove. The opening of the groove is located on the first surface, and the groove is located between the injection hole and the second guide groove. The bottom wall of the groove has a through hole that penetrates the second surface. The explosion-proof part is configured to be opposite to the explosion-proof valve of the energy storage device.

3. The insulator of claim 2, wherein The insulating component includes a first partition plate, which is disposed within the first guide groove along the width direction of the insulating component and spaced apart from the two opposite side walls of the first guide groove along the length direction of the insulating component.

4. The insulator of claim 3, wherein The insulating member has a second center line, which is parallel to the length direction of the insulating member, and the distance from the second center line to the two opposite edges in the width direction of the insulating member is equal; a plurality of second sub-slots are symmetrically arranged about the second center line.

5. The insulator of claim 2, wherein The insulating component includes a first connecting portion and a first flow guiding portion. The first flow guiding portion, the first connecting portion, and the explosion-proof portion are connected sequentially along the first direction. The first flow guiding groove is disposed on the first flow guiding portion, and the liquid injection hole is disposed on the first connecting portion. The first surface is a plane, and the thickness of the first flow guiding portion is greater than or equal to the thickness of the first connecting portion.

6. The insulator of claim 5, wherein The insulating component further includes a second connecting portion and a second flow guiding portion, wherein the second connecting portion is connected to the side of the explosion-proof portion opposite to the first connecting portion, and the second flow guiding portion is connected to the side of the second connecting portion opposite to the explosion-proof portion; a second flow guiding groove is disposed in the second flow guiding portion; The thickness of the second guide portion is greater than or equal to the thickness of the second connecting portion and the thickness of the first connecting portion.

7. The insulating component according to claim 2, characterized in that, The first through hole is disposed between the injection hole and the first guide groove, and is spaced apart from the injection hole and the first guide groove; the second through hole is disposed between the groove and the second guide groove, and is spaced apart from the groove and the second guide groove.

8. An end cap assembly, characterized in that, The assembly includes an end cap and an insulating member as described in any one of claims 1 to 7. The end cap is provided with a liquid injection through hole, which penetrates the end cap along its thickness direction. Along the thickness direction of the end cap assembly, the insulating member is stacked and fixedly connected to the end cap. The first surface faces the end cap, and the liquid injection hole and the liquid injection through hole are disposed opposite to each other and communicate with each other.

9. The end cap assembly according to claim 8, characterized in that, The end cap is also provided with an explosion-proof hole, which is spaced apart from the liquid injection hole along the first direction; The end cap assembly also includes an explosion-proof valve, which is disposed inside the explosion-proof hole and is fixedly connected to the inner wall of the explosion-proof hole. The insulating component includes an explosion-proof part, which has a groove; along the thickness direction of the end cap assembly, the explosion-proof valve is disposed opposite to the groove and spaced apart from the bottom wall of the groove.

10. The end cap assembly according to claim 9, characterized in that, The end cap is further provided with a first pole post through hole and a second pole post through hole. The first pole post through hole and the second pole post through hole are spaced apart along the first direction and along the thickness direction of the end cap assembly. The first pole post through hole is opposite to and communicates with the first through hole of the insulating component, and the second pole post through hole is opposite to and communicates with the second through hole of the insulating component. The end cap assembly further includes a first pole post and a second pole post, wherein the first pole post passes through the first pole post through hole and the first through hole, and the second pole post passes through the second pole post through hole and the second through hole.

11. An energy storage device, characterized in that, The device includes a housing, an electrode assembly, and an end cap assembly as described in any one of claims 8 to 10, wherein the housing has an opening, the housing has a receiving cavity communicating with the opening, the electrode assembly is disposed within the receiving cavity, and the end cap assembly covers the opening and is fixedly connected to the housing.

12. An electrical appliance, characterized in that, Includes the energy storage device as described in claim 11, wherein the energy storage device is used to supply power to the electrical equipment.

Images