Heterojunction battery energy storage system

Abstract

The invention discloses a heterojunction battery energy storage system which comprises a device body, an energy management system and a battery supporting assembly are installed in the device body, a plurality of battery containing assemblies are installed in the battery supporting assembly, and battery modules are connected into the battery containing assemblies. Compared with the prior art, according to the heterojunction battery energy storage system, the solar cell panel is installed on the top end face of the shell, auxiliary power supply is carried out through weak light resources in an extremely cold environment, dependence on an external power source is reduced, and the energy storage efficiency is improved. The energy consumption cost is reduced; the heating pipes are laid on the inner wall of the battery rack, the distributed layout is adopted to ensure that heat is uniformly transferred to the surface of the battery, and electrolyte solidification is avoided; the battery rack adopts a modular drawer design, each drawer is independently connected with a battery module, and flame is effectively prevented from being generated and spread in cooperation with a control system and a fireproof structure on the inner wall of the drawer.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a heterojunction battery energy storage system. Background Art

[0002] Heterojunction batteries efficiently convert solar energy into direct current (DC), which is then converted into AC through a bidirectional power storage converter (PCS) and fed into the power grid or supplied to the load. Energy storage equipment stores electricity when there is excess power generation and releases it during peak demand or when the grid is off-grid. The energy management system (EMS) monitors power generation, storage, and loads in real time and intelligently dispatches them to achieve stable power output, peak-to-valley shifting, or off-grid power supply.

[0003] At present, when heterojunction battery energy storage systems are used in extremely cold environments, the internal resistance of the battery increases and the charging and discharging efficiency decreases. Long-term operation may shorten the battery life and require additional reliance on AC power or diesel generators, increasing operating costs and environmental dependence. Low temperatures lead to the risk of electrolyte solidification, which may cause internal short circuits or thermal runaway in the battery. Thermal runaway of a single battery may trigger a chain reaction, causing the entire battery rack to catch fire or explode, resulting in systemic losses.

[0004] Therefore, in response to the above technical problems, it is necessary to provide a heterojunction battery energy storage system.

[0005] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0006] The object of the present invention is to provide a heterojunction battery energy storage system that can solve the problems raised in the above background technology.

[0007] In order to achieve the above-mentioned purpose, a technical solution provided by a specific embodiment of the present invention is as follows: a heterojunction battery energy storage system, comprising a device body, an energy management system and a battery support assembly installed in the device body, several groups of battery holding assemblies installed in the battery support assembly, several groups of battery holding assemblies are connected to battery modules, a control system for controlling the battery holding assemblies is installed on the rear side of the battery holding assemblies in the device body, and a solar power generation assembly for auxiliary power supply is installed on the top end face of the device body.

[0008] In one or more embodiments of the present invention, the device body includes a shell, a rain cover is installed on the top end face of one side of the shell, a door is installed on one side wall of the device body, and a partition wall for separating the energy management system and the battery support assembly is installed on the inner wall of the shell.

[0009] In one or more embodiments of the present invention, the battery support assembly includes a battery rack, which is installed on the inner wall of the shell located on one side of the partition wall, and a plurality of battery receiving slots are provided on one side wall of the battery rack. A first slide groove is provided on a pair of side walls of the battery rack located on the plurality of battery receiving slots, and a second slide groove is provided on one side of the plurality of first slide grooves.

[0010] In one or more embodiments of the present invention, a plurality of groups of heating tubes are installed on the inner wall of the battery rack, and the heating tubes are electrically connected to the solar power generation components.

[0011] In one or more embodiments of the present invention, the battery holding assembly includes a drawer-type collection bin, a pair of side walls of the drawer-type collection bin are integrally formed with a slide rod and a limit block that match the first slide groove and the second slide groove, a sealing strip is fixedly connected to the top end face of the drawer-type collection bin, a handle is installed on one side wall of the sealing strip, and a support partition is installed on the inner wall of the drawer-type collection bin, and the support partition includes a heat insulation layer, a flame retardant layer and an aerogel layer.

[0012] In one or more embodiments of the present invention, the control system includes a pair of support columns, which are respectively installed on the side walls at both ends of the battery support assembly in the shell, one group of the support columns has a vertical groove on one side wall, and the other group of the support columns has a cross groove on the side wall.

[0013] In one or more embodiments of the present invention, a control motor is installed on the inner wall of the device body below the support column, the output end of the control motor is located in the vertical groove and is fixedly connected to a threaded rod, bearings are installed on the upper and lower end surfaces of the threaded rod, and a pair of inner rings of the bearings are welded to the outer walls at both ends of the threaded rod.

[0014] In one or more embodiments of the present invention, a support rod is threadedly connected to the outer wall of the threaded rod, and a threaded hole matching the threaded rod is provided at one end of the support rod close to the threaded rod. A first slider matching the cross groove on the vertical groove is integrally formed on the outer wall of the other end of the support rod, and the outer wall of the first slider slides on the inner wall of the cross groove.

[0015] In one or more embodiments of the present invention, a moving groove is provided on the side wall of the support rod, and limiting grooves are provided on the upper and lower end surfaces of the moving groove. A rack is installed on one side wall of the support rod.

[0016] In one or more embodiments of the present invention, a moving block matching the moving groove is slidably connected inside the support rod, a second slider matching the limit groove is integrally formed on the outer wall of the moving block, the outer wall of the second slider slides on the inner wall of the limit groove, a moving motor is installed on the bottom end face of the moving block, the output end of the moving motor is fixedly connected to a spur gear matching the rack, the rack and the spur gear are meshed with each other, a circular hole is opened on the side wall of the moving block, and an electric telescopic rod is installed on the inner wall of the circular hole.

[0017] Compared with the existing technology, the heterojunction battery energy storage system of the present invention installs a solar panel on the top end face of the shell, uses the weak light resources in the extremely cold environment for auxiliary power supply, reduces dependence on external power sources, and reduces energy consumption costs; heating tubes are laid on the inner wall of the battery rack, and a distributed layout is adopted to ensure that heat is evenly transferred to the battery surface to avoid solidification of the electrolyte; the battery rack adopts a modular drawer design, each drawer is independently connected to the battery module, and cooperates with the control system and the fire-proof structure of the inner wall of the drawer to effectively prevent the generation and spread of flames. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a heterojunction battery energy storage system according to an embodiment of the present invention;

[0020] Figure 2 This is a structural cross-sectional view of a heterojunction battery energy storage system according to one embodiment of the present invention;

[0021] Figure 3 This is a structural side view of a heterojunction battery energy storage system according to one embodiment of the present invention;

[0022] Figure 4 A schematic diagram of the partial structure of a heterojunction battery energy storage system according to one embodiment of the present invention Figure 1 ;

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 A structural cross-sectional view of a battery rack according to an embodiment of the present invention;

[0025] Figure 7An exploded view of the local structure of a heterojunction battery energy storage system according to one embodiment of the present invention;

[0026] Figure 8 A schematic diagram of the partial structure of a heterojunction battery energy storage system according to one embodiment of the present invention Figure 2 ;

[0027] Figure 9 A schematic diagram of the partial structure of a heterojunction battery energy storage system according to one embodiment of the present invention Figure 3 ;

[0028] Figure 10 A schematic structural diagram of a supporting partition in one embodiment of the present invention;

[0029] Figure 11 This is a partial structural cross-sectional view of the supporting partition structure in one embodiment of the present invention.

[0030] Description of main reference numerals:

[0031] 1-Device body, 101-Shell, 102-Rainproof cover, 103-Door, 104-Temperature adjustment component, 105-Partition wall, 2-Energy management system, 3-Battery support component, 301-Battery rack, 3011-Heating tube, 302-Battery holding slot, 3021-First slide slot, 3022-Second slide slot, 4-Battery holding component, 401-Drawer type collection bin, 402-Slide rod, 403-Limiting block, 404-Sealing strip, 405-Handle, 406-Support partition, 40 61-insulation layer, 4062-flame retardant layer, 4063-aerogel layer, 5-control system, 501-support column, 5011-vertical slot, 502-control motor, 503-threaded rod, 504-support rod, 5041-moving slot, 5042-threaded hole, 5043-first slider, 505-rack, 506-moving block, 5061-second slider, 507-electric telescopic rod, 508-moving motor, 509-spur gear, 6-solar power generation component, 601-solar panel. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0033] like Figures 1 and 2As shown, a heterojunction battery energy storage system in one embodiment of the present invention includes a device body 1, an energy management system 2 and a battery support assembly 3 installed in the device body 1, a plurality of battery holding assemblies 4 installed in the battery support assembly 3, and a battery module connected to each of the plurality of battery holding assemblies 4. A control system 5 for controlling the battery holding assemblies 4 is installed on the rear side of the battery holding assemblies 4 in the device body 1, and a solar power generation assembly 6 for auxiliary power supply is installed on the top end surface of the device body 1. The solar power generation assembly 6 includes a solar panel 601. The solar panel 601 absorbs sunlight energy. The solar power generation assembly 6 is connected to the battery energy storage system through a DC-DC converter, and the heating tube is powered first. The remaining electrical energy is directly stored or used by the control system 5. When the battery temperature is high, the control system and the fireproof structure of the inner wall of the drawer are used to effectively prevent the generation and spread of flames.

[0034] like Figures 1 to 4 As shown, the device body 1 includes a housing 101. A rain cover 102 is mounted on one top end surface of the housing 101. A door 103 is mounted on one side wall of the device body 1. In extremely cold outdoor environments, where the temperature is low, heat generated by the operating batteries can be transferred to the interior of the device body 1. Workers can enter the interior of the device body 1 through door 103 to keep warm, thus avoiding danger in harsh environments. A temperature adjustment assembly 104 is mounted on the rear side of the battery support assembly 3 within the housing 101. A partition 105 is mounted on the inner wall of the housing 101 to separate the energy management system 2 from the battery support assembly 3.

[0035] like Figure 6 As shown, the battery support assembly 3 includes a battery rack 301. Several sets of heating tubes 3011 are mounted on the inner wall of the battery rack 301. The heating tubes 3011 are electrically connected to the solar power generation assembly 6. When the temperature is low, the electricity generated by the solar power generation assembly 6 drives the heating tubes 3011. A distributed layout ensures uniform heat transfer to the battery surface. The heating tubes are linked to the solar panels and energy storage system, and closed-loop control is achieved through a PID temperature controller with a set temperature range of -20°C to 10°C. The surface of the heating tubes is covered with an insulating thermally conductive material, such as a graphene coating, to prevent local overheating and improve thermal efficiency.

[0036] like Figures 4 and 5 and Figures 9 and 10As shown, the battery rack 301 is installed on the inner wall of the housing 101 on one side of the partition wall 105 , and a plurality of battery receiving slots 302 are provided on one side wall of the battery rack 301 . The battery rack 301 is located on a pair of side walls of several groups of battery holding slots 302, and a first slide slot 3021 is provided on each side of several groups of first slide slots 3021. A second slide slot 3022 is provided on one side of each group of first slide slots 3021. The battery holding assembly 4 includes a drawer-type collection bin 401. A pair of side walls of the drawer-type collection bin 401 are integrally formed with a slide rod 402 and a limit block 403 that match the first slide slot 3021 and the second slide slot 3022. A handle 405 is installed on one side wall of the sealing strip 404. The battery rack adopts a modular drawer design. Each drawer is independently connected to the battery module. When a problem occurs in a single battery module, it is convenient to solve it in time while reducing damage to other battery modules. The faulty drawer can be replaced separately. A temperature sensor for detecting the internal temperature of the battery holding slot 302 is installed on the top inner wall of each group of battery holding slots 302 to monitor the temperature of the battery in real time. When the battery needs to be inspected or repaired, the handle 405 is manually pulled to move the drawer-type collection bin 401 toward the side away from the battery rack 301, while driving the side walls of the limit block 403 and the slide bar 402 to slide on the inner wall of the first slide groove 3021, and driving the upper and lower end faces of the slide bar 402 to slide on the inner wall of the second slide groove 3022. When the limit block 403 slides to a side wall that is in contact with the first slide groove 3021 close to the second slide groove 3022, it stops. This is the limit position of the movable drawer-type collection bin 401.

[0037] Furthermore, a sealing strip 404 is fixedly attached to the top end surface of each drawer-type collection bin 401. In extremely cold environments, the temperature difference between the inside and outside of the battery bin may cause condensation. The sealing strip prevents external moisture from penetrating, preventing damage to the battery components due to freezing and expansion of condensed water, while also preventing the risk of short circuits in the circuit boards.

[0038] like Figure 11 As shown, a support partition 406 is installed on the inner wall of the drawer-type collection bin 401. The support partition 406 includes a heat-insulating layer 4061, a flame-retardant layer 4062 and an aerogel layer 4063. The heat-insulating layer 4061 is ceramic fiber or aerogel felt, which blocks heat transfer; the flame-retardant layer 4062 is expanded graphite or aluminum hydroxide composite material, which releases inert gas to inhibit combustion when exposed to high temperature; the aerogel layer 4063 uses silica aerogel to fill the gap to prevent flames from penetrating. When a single battery catches fire, the fire-proof structure can confine the flame to the drawer to avoid affecting adjacent batteries. The flame-retardant layer reduces the release of toxic gases and reduces the risk of personal injury.

[0039] like Figure 2 、 Figure 7 and Figure 8As shown, the control system 5 includes a pair of support columns 501, which are respectively installed on the side walls of the battery support assembly 3 at both ends in the shell 101, one side wall of one group of support columns 501 is provided with a vertical groove 5011, and the side wall of the other group of support columns 501 is provided with a cross groove. A control motor 502 is installed on the inner wall of the device body 1 below the support columns 501, and the output end of the control motor 502 is located in the vertical groove 5011 and is fixedly connected to a threaded rod 503. Bearings are installed on the upper and lower end surfaces of the threaded rod 503, and the inner rings of a pair of bearings are welded to the outer walls of the two ends of the threaded rod 503. The outer wall of the threaded rod 503 is threadedly connected to a support rod 504, and the support rod 504 is close to one end of the threaded rod 503. A threaded hole 5042 is provided to match the threaded rod 503, and a first slider 5043 is integrally formed on the outer wall of the other end of the support rod 504 to match the cross groove on the vertical groove 5011. The outer wall of the first slider 5043 slides on the inner wall of the cross groove, and a moving groove 5041 is provided on the side wall of the support rod 504. Limiting grooves are provided on the upper and lower end surfaces of the moving groove 5041. A rack 505 is installed on one side wall of the support rod 504. A moving block 506 matching the moving groove 5041 is slidably connected in the support rod 504, and a second slider 5061 matching the limiting groove is integrally formed on the outer wall of the moving block 506. The outer wall of the second slider 5061 slides on the inner wall of the limiting groove, and the bottom end surface of the moving block 506 A moving motor 508 is installed on it, and the output end of the moving motor 508 is fixedly connected to a spur gear 509 that matches the rack 505. The rack 505 and the spur gear 509 mesh with each other. A circular hole is opened on the side wall of the moving block 506, and an electric telescopic rod 507 is installed on the inner wall of the circular hole. When the temperature sensor detects that the temperature of a single battery pack is high, the management system drives the control system 5 to work. First, the control motor 502 is turned on, driving the threaded rod 503 to rotate in the support column 501 while meshing with the support rod 504 through the threaded hole 5042, thereby driving the support rod 504 to move up and down, and at the same time driving the first slider 5043 to slide on the inner wall of the cross slot of another set of support columns 501, so as to realize the height adjustment of the support rod 504. After the adjustment, the moving motor 508 is turned on, driving the spur gear 509 to rotate and engage with the rack 505, thereby driving the outer wall of the second slider 5061 to slide on the inner wall of the moving groove 5041, realizing the adjustment of the left and right position of the moving block 506, and driving the moving block 506 to move to the rear side of the battery pack with higher temperature under the action of the control motor 502 and the moving motor 508. Then the electric telescopic rod 507 is opened, pushing the drawer-type collection bin 401 to move outward, so that the battery pack with higher temperature can be automatically cooled in the severe cold environment outdoors. Magnets are installed on the side wall of the electric telescopic rod 507 close to the drawer-type collection bin 401 and the side wall of the drawer-type collection bin 401 close to the electric telescopic rod 507. When the temperature drops,The electric telescopic rod 507 drives the drawer-type collection bin 401 to slide in the opposite direction through magnetic attraction, driving the drawer-type collection bin 401 and the battery pack back into the battery rack 301.

[0040] During use, the solar power generation component 6 adopts low-temperature resistant materials and an inclined angle design to ensure that it can still efficiently receive light in an extremely cold environment. When the battery is affected by the low-temperature environment, it gives priority to powering the heating tube 3011 to restore the battery to normal temperature and ensure the normal use of the battery. The remaining electric energy is directly stored or used by the control system, thereby reducing operating costs and environmental dependence; when the battery temperature is high, the control system 5 controls the battery pack to move to the outside of the battery support component 3, and when the temperature of the battery pack returns to normal, it drives the battery pack back to the battery support component 3 to continue working. When the battery pack catches fire, under the action of the control system 5, the multi-layer structure of the supporting partition 406 is cooperated to organize the spread of the flame to avoid harm to the staff or the surrounding environment, thereby forming a stable heterojunction battery energy storage system.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A heterojunction battery energy storage system, characterized in that: The device comprises a main body, an energy management system and a battery support assembly installed in the main body, a plurality of battery holding assemblies installed in the battery support assembly, each of the plurality of battery holding assemblies being connected to a battery module, and a control system for controlling the battery holding assemblies installed on the rear side of the battery holding assemblies in the main body; A solar power generation component for auxiliary power supply is installed on the top end surface of the device body.

2. A heterojunction battery energy storage system according to claim 1, characterized in that: The device body includes a shell, a rain cover is installed on the top end surface of one side of the shell, a door is installed on one side wall of the device body, and a partition wall for separating the energy management system and the battery support assembly is installed on the inner wall of the shell.

3. A heterojunction battery energy storage system according to claim 2, characterized in that: The battery support assembly includes a battery rack, which is installed on the inner wall of the shell on one side of the partition wall. Several groups of battery holding slots are provided on one side wall of the battery rack. A first slide groove is provided on a pair of side walls of the battery rack located on the several groups of battery holding slots, and a second slide groove is provided on one side of several groups of the first slide grooves.

4. A heterojunction battery energy storage system according to claim 3, characterized in that: Several groups of heating tubes are installed on the inner wall of the battery rack, and the heating tubes are electrically connected to the solar power generation components.

5. A heterojunction battery energy storage system according to claim 4, characterized in that: The battery holding assembly includes a drawer-type collection bin, a pair of side walls of which are integrally formed with a slide rod and a limit block that match the first slide groove and the second slide groove; a sealing strip is fixedly connected to the top end surface of the drawer-type collection bin, a handle is installed on one side wall of the sealing strip, and a support partition is installed on the inner wall of the drawer-type collection bin, and the support partition includes a heat insulation layer, a flame retardant layer and an aerogel layer.

6. A heterojunction battery energy storage system according to claim 5, characterized in that: The control system includes a pair of support columns, which are respectively installed on the side walls at both ends of the battery support assembly in the shell. One group of support columns has a vertical groove on one side wall, and the other group of support columns has a cross groove on the side wall.

7. A heterojunction battery energy storage system according to claim 6, characterized in that: A control motor is installed on the inner wall of the device body below the support column. The output end of the control motor is located in the vertical slot and is fixedly connected to a threaded rod. Bearings are installed on the upper and lower end surfaces of the threaded rod, and the inner rings of a pair of bearings are welded to the outer walls at both ends of the threaded rod.

8. The heterojunction battery energy storage system according to claim 7, characterized in that: A support rod is threadedly connected to the outer wall of the threaded rod, and a threaded hole matching the threaded rod is provided at one end of the support rod close to the threaded rod. A first slider matching the cross groove on the vertical groove is integrally formed on the outer wall of the other end of the support rod, and the outer wall of the first slider slides on the inner wall of the cross groove.

9. The heterojunction battery energy storage system according to claim 8, characterized in that: A moving groove is provided on the side wall of the support rod, and limiting grooves are provided on the upper and lower end surfaces of the moving groove. A rack is installed on one side wall of the support rod.

10. The heterojunction battery energy storage system according to claim 9, characterized in that: A moving block matching the moving groove is slidably connected in the support rod, a second slider matching the limit groove is integrally formed on the outer wall of the moving block, the outer wall of the second slider slides on the inner wall of the limit groove, a moving motor is installed on the bottom end face of the moving block, and the output end of the moving motor is fixedly connected to a spur gear matching the rack, the rack and the spur gear are meshed with each other, a circular hole is opened on the side wall of the moving block, and an electric telescopic rod is installed on the inner wall of the circular hole.

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