A large capacity battery structure

Abstract

The application provides a large-capacity battery structure, and belongs to the technical field of energy storage batteries.The large-capacity battery structure comprises a battery cylinder, a temperature management unit, a pole, an upper cover plate and a battery module.The battery module is arranged in the inner cavity of the battery cylinder.The upper cover plate is arranged at the top opening of the battery cylinder.The pole is connected with the battery module and extends to the upper cover plate and is connected with the temperature management unit.The part of the pole connected with the battery module is arranged in the inner cavity of the battery cylinder.The temperature management unit can realize heat dissipation or heating of the inside of the battery, so that the working temperature of the battery is always in the optimal range, the internal temperature of the battery is effectively controlled, and the reliability, safety and service life of the large-capacity battery are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of energy storage batteries, and relates to parallel connection and temperature control technology of large-capacity batteries, in particular to a large-capacity battery structure. BACKGROUND

[0002] As of the end of 2020, among various types of electrochemical energy storage batteries, the cumulative installed capacity of lithium ion batteries is the largest, about 2.9 GWh.

[0003] The research and development of large-capacity energy storage batteries in China is basically blank, mainly limited by production equipment, safety technology, high scrap rate, mass production cost and other factors, and the cost of energy storage is the key to the development of energy storage systems. Most of the existing large-capacity lithium ion batteries are formed by connecting multiple battery cells in parallel to form a large-capacity lithium ion battery. However, the large-capacity lithium ion battery needs to be connected in series to meet the capacity requirement during use, resulting in a large number of connection parts, complex connection steps, time and labor consumption, and a large amount of battery management system, wire and battery box, resulting in high energy storage cost. Moreover, due to the complex connection lines and different internal resistances, this connection method causes current difference, which is very easy to cause battery heating. The consistency of the battery will become worse and worse after long-term use, which not only exists safety hazard, but also seriously affects the service life of the battery.

[0004] Patent No. CN205810902U discloses a soft package battery fixing device and a soft package battery module. The device includes two identical plastic supports and two identical metal plates. The metal plates have battery accommodating grooves for accommodating soft package batteries. The two identical metal plates are fixed to the two identical plastic supports respectively, forming two identical battery placing units. The two identical battery placing units are connected and fixed oppositely, so that the two battery accommodating grooves of the two identical metal plates are connected to form a battery placing cavity. The battery placing cavity is used for placing the soft package battery, so that the soft package battery fixing device and the soft package battery in the battery placing cavity jointly constitute a soft package battery unit. The module is formed by a plurality of soft package battery units. The patent uses a soft package battery fixing device to fix the soft package battery. Each fixing device only fixes a small number of soft package batteries, which is high in cost and complicated in process.

[0005] Patent No. CN213692275U discloses a soft package battery adapter plate and a soft package battery. The patent uses a PCB substrate to weld the tabs of the soft package batteries together, thereby forming electrical connection between the soft package batteries. This connection method has small current carrying capacity, high cost and complicated process. SUMMARY

[0006] In view of the problems of high cost and complicated process in connecting the existing soft package batteries, the application provides a large-capacity battery structure.

[0007] The specific technical solutions of the present application are as follows:

[0008] A large-capacity battery structure, comprising a battery cylinder, a temperature management unit, a pole, an upper cover plate and a battery module, the battery module is placed in the inner cavity of the battery cylinder, the upper cover plate is placed at the top opening of the battery cylinder, the pole is connected with the battery module and extends to the upper cover plate and is connected with the temperature management unit.

[0009] Further limited, the battery module is provided with an L-shaped adapter row, and the battery module is connected with the pole through the L-shaped adapter row.

[0010] Further limited, one inner side of the L-shaped adapter row is connected with the battery module, and the other inner side of the L-shaped adapter row is connected with the pole.

[0011] Further limited, the battery module and the pole are fixedly connected through a fastener.

[0012] Further limited, the fastener is a screw.

[0013] Further limited, the side of the pole is provided with a C-shaped fixing groove along the length direction, a heat-conducting fire extinguishing pipe is inlaid in the C-shaped fixing groove, and a heat-conducting fire extinguishing material is filled in the lumen of the heat-conducting fire extinguishing pipe; the heat-conducting fire extinguishing pipe extends into the inner cavity of the battery cylinder.

[0014] Further limited, the heat-conducting fire extinguishing material is a halogenated alkane.

[0015] Further limited, the bottom of the battery cylinder is fixedly connected with a bottom cover.

[0016] Further limited, the battery cylinder comprises an inner cylinder and an outer cylinder, the inner cylinder is placed inside the outer cylinder, the inner cylinder is connected with the outer cylinder through a connecting rib, the battery module and the L-shaped adapter row are placed in the inner cavity of the inner cylinder, and the inner cylinder and the outer cylinder are fixedly connected with the upper cover plate and the bottom cover.

[0017] Further limited, the upper cover plate is fixedly connected with the inner cylinder and / or the outer cylinder and / or the connecting rib through a screw.

[0018] Further limited, the inner cylinder is a square cylindrical structure, the outer cylinder is a cylindrical structure, and the inner cylinder and the outer cylinder are integrally extruded.

[0019] Further limited, the outer side wall of the battery cylinder is provided with an accessory connecting groove.

[0020] Further limited, the outer side of the battery cylinder is provided with a handle, and the handle is connected with the battery cylinder through the accessory connecting groove.

[0021] Further limited, the material of the handle is aluminum alloy or steel.

[0022] Further limited, the battery module includes a plurality of parallel stacked battery cells, and the outer side of the battery module is provided with a pressing plate, the pressing plate is arranged in parallel with the battery cells, and the pressing plate and the battery module are bundled by a bundling belt.

[0023] Further limited, the pressing plate is an insulating plate, and the material of the insulating plate is one or a combination of two or more of polyvinyl chloride, polypropylene, polystyrene, polyformaldehyde, polymethyl methacrylate, polybutylene terephthalate, polycarbonate, or acrylonitrile-butadiene-styrene copolymer; the bundling belt is an insulating bundling belt.

[0024] Further limited, the internal resistance and voltage of the plurality of battery cells are the same.

[0025] Further limited, one or more battery modules are arranged in the inner cavity of the battery barrel, and if there are a plurality of battery modules, the plurality of battery modules are connected in parallel.

[0026] Further limited, the temperature management unit includes a semiconductor refrigeration assembly, a heat equalizing row, and a heating sheet, the pole post is provided with a pole post through hole in the length direction, the heat equalizing row is inserted into the pole post through hole, and the heat equalizing row extends to the outside of the pole post through hole and is connected with the semiconductor refrigeration assembly, and the semiconductor refrigeration assembly is connected with the heating sheet; the semiconductor refrigeration assembly is arranged above the battery barrel.

[0027] Further limited, the heat equalizing row is an L-shaped gravity heat row.

[0028] Further limited, the material of the heating sheet is silicone rubber, polyimide, or polyacetamide.

[0029] Further limited, a heat-conducting material is filled between the heat equalizing row and the hole wall of the pole post through hole; the heat-conducting material is liquid heat-conducting glue or two-component sealing heat-conducting glue.

[0030] Further limited, an upper layer insulating pad and a lower layer insulating pad are sequentially arranged between the battery barrel and the semiconductor refrigeration assembly from top to bottom, and the heat equalizing row is arranged between the upper layer insulating pad and the lower layer insulating pad. Further limited, the material of the lower layer insulating pad is rubber, polypropylene, or epoxy resin, and the lower layer insulating pad can withstand a temperature above 130°C; the material of the upper layer insulating pad is insulating heat-conducting silica gel sheet, heat-conducting PPS, or heat-conducting nylon 66, and the upper layer insulating pad can withstand a temperature above 260°C.

[0031] Further limited, the battery barrel and the upper cover plate are integrally formed by injection molding.

[0032] Further limited, the material of the battery cylinder and the upper cover plate is hydrogenated nitrile rubber, ethylene propylene rubber, fluorine rubber, silicone rubber or polypropylene.

[0033] Further limited, the upper cover plate is provided with a pressure relief valve.

[0034] Further limited, the temperature acquisition sensor is used to acquire the temperature of the pole column, and the temperature acquisition sensor is electrically connected with the temperature control unit, and the temperature control unit is connected with the semiconductor refrigeration assembly and the heating sheet.

[0035] Further limited, the insulating plate is arranged between the pole column and the inner wall of the battery cylinder, and the material of the insulating plate is polyvinyl chloride, polypropylene, polystyrene, polyformaldehyde, polymethyl methacrylate, polybutylene terephthalate, polycarbonate, acrylonitrile-butadiene-styrene copolymer, epoxy resin or rubber.

[0036] Compared with the prior art, the beneficial effects of the present application are that:

[0037] 1、The large-capacity battery structure comprises a battery cylinder, a temperature management unit, a pole column, an upper cover plate and a battery module, the temperature management unit is connected to the pole column, the temperature management unit can realize heat dissipation or heating in the battery, so that the working temperature of the battery is always in the best range, the internal temperature of the battery is effectively controlled, and the reliability, safety and service life of the large-capacity battery are improved.

[0038] 2、The battery module is provided with an L-shaped adapter row, and the battery module is connected with the pole column through the L-shaped adapter row.

[0039] 3、The battery module and the pole column are fixedly connected through fasteners, and the physical fixed connection between the battery module and the pole column is realized through the fasteners.

[0040] 4、A C-shaped fixing groove is arranged on the side of the pole column along the length direction, and a heat-conducting fire extinguishing pipe is embedded in the C-shaped fixing groove.

[0041] 5、The battery cylinder comprises an inner cylinder and an outer cylinder, and the inner cylinder is connected with the outer cylinder through connecting ribs.

[0042] 6、The battery barrel body is provided with an accessory connecting groove on the outer side wall, and a handle or other connecting member for fixing the battery can be connected through the accessory connecting groove, thereby facilitating the fixing and connection of the whole battery structure.

[0043] 7、The battery module comprises a plurality of battery cells arranged in parallel and stacked, and a pressing plate is arranged on the outer side of the battery module, the pressing plate being arranged in parallel with the battery cells, and the pressing plate and the battery module being bundled by a bundling belt, so that the battery module and the pressing plate are fixed by the bundling belt to prevent movement or misalignment between the plurality of battery cells or between the battery cells and the pressing plate.

[0044] 8、The internal resistance and voltage of the plurality of battery cells are the same, and the consistency of the plurality of battery cells during operation can be ensured when the internal resistance and voltage are the same.

[0045] 9、The temperature management unit comprises a semiconductor refrigeration assembly, a heat equalizing row and a heating sheet, when the battery temperature is too high, the heat equalizing row conducts the temperature of the pole to the semiconductor refrigeration assembly, and the semiconductor refrigeration assembly dissipates heat, when the battery temperature is too low, the heating sheet heats the heat equalizing row, and the heat equalizing row conducts heat to the inside of the battery, so that the working temperature of the battery is always within the best range, and the working efficiency of the battery is ensured.

[0046] 10、Thermal conductive material is filled between the heat equalizing row and the hole wall of the pole through hole, and the transmission efficiency of heat from the pole to the heat equalizing row can be improved through the thermal conductive material, so that the heat generated in the battery can be dissipated in time and effectively.

[0047] 11、An insulating pad layer is arranged between the battery barrel body and the semiconductor refrigeration assembly, and the insulating performance between the battery barrel body and the semiconductor refrigeration assembly can be ensured through the insulating pad layer.

[0048] 12、A pressure relief valve is arranged on the upper cover plate, and the pressure relief port corresponding to the pressure relief valve can be used for vacuumizing, liquid injection and pressure relief, that is, the inner cavity of the battery barrel body can be vacuumized before liquid injection, liquid injection is performed after vacuumization, the pressure relief valve is installed after liquid injection, and if thermal runaway occurs during normal operation of the battery, the pressure relief valve can be opened through the pressure in the battery to relieve the pressure in the battery barrel body.

[0049] 13. The temperature acquisition sensor is connected to the pole, the temperature acquisition sensor is used for acquiring the temperature of the pole, the temperature acquisition sensor is electrically connected with the temperature control unit, and the temperature control unit is connected with the semiconductor refrigeration assembly and the heating sheet. The temperature acquisition sensor acquires the temperature on the pole in real time, and simultaneously transmits the acquired temperature to the temperature control unit. The temperature control unit receives the temperature transmitted by the temperature acquisition sensor and judges the temperature. If it is judged that the temperature exceeds the preset maximum temperature, the temperature control unit controls the semiconductor refrigeration assembly to start heat dissipation inside the battery. If it is judged that the temperature exceeds the preset minimum temperature, the temperature control unit controls the heating sheet to heat the inside of the battery. The reliability, safety and service life of the large-capacity lithium ion battery are improved.

[0050] 14. An insulating plate is arranged between the pole and the inner wall of the battery cylinder, and the insulating performance between the pole and the inner wall of the battery cylinder is improved through the insulating plate. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 It is a structural schematic view of the large-capacity battery structure of the application.

[0052] Figure 2 It is a structural schematic view of the connection between the outer cylinder and the inner cylinder.

[0053] Figure 3 It is a structural schematic view of the inner cylinder.

[0054] Figure 4 It is a structural schematic view of the battery module.

[0055] Figure 5 It is a structural schematic view of the pole.

[0056] Figure 6 It is a structural schematic view of the connection between the pole and the battery module.

[0057] Figure 7 It is a structural schematic view of the connection between the upper cover plate and the pole.

[0058] Figure 8 It is a structural schematic view of the temperature management unit.

[0059] Figure 9 It is a structural schematic view of the connection between the temperature management unit and the pole.

[0060] Figure 10 It is a structural schematic view of the connection between the temperature management unit, the pole, the battery module and the upper cover plate.

[0061] 1 - inner cylinder, 11 - bottom cover, 12 - accessory connecting groove, 13 - cylinder wall through hole, 14 - connecting rib, 2 - temperature management unit, 21 - semiconductor refrigeration assembly, 22 - uniform heating row, 23 - heating sheet, 24 - upper layer insulation pad, 25 - lower layer insulation pad, 3 - pole, 31 - pole through hole, 32 - threaded hole, 33 - C-shaped fixed groove, 4 - upper cover plate, 5 - pressure relief valve, 6 - battery module, 61 - battery cell, 62 - pressing plate, 621 - bolt fixing hole, 63 - binding belt, 64 - L-shaped adapter row, 65 - screw. DETAILED DESCRIPTION

[0062] The technical solutions of the present application will be further explained and described below in combination with the drawings and examples, but the present application is not limited to the following described embodiments.

[0063] The application discloses a large-capacity battery structure which comprises a battery cylinder, a temperature management unit 2, a pole 3, an upper cover plate 4 and a battery module 6. The battery module 6 is arranged in the inner cavity of the battery cylinder, the upper cover plate 4 is arranged at the top opening of the battery cylinder, the pole 3 is connected with the battery module 6 and extends to the upper side of the upper cover plate 4 and is connected with the temperature management unit 2. The battery module 6 is provided with an L-shaped adapter row 64, and the battery module 6 is connected with the pole 3 through the L-shaped adapter row 64. One inner side of the L-shaped adapter row 64 is connected with the battery module 6, and the other inner side of the L-shaped adapter row 64 is connected with the pole 3. The battery module 6 and the pole 3 are fixedly connected through fasteners. The fasteners are screws. The side of the pole 3 is provided with a C-shaped fixing groove 33 in the length direction, a heat-conducting fire extinguishing pipe is embedded in the C-shaped fixing groove 33, the pipe cavity of the heat-conducting fire extinguishing pipe is filled with heat-conducting fire extinguishing material, and the heat-conducting fire extinguishing pipe extends into the inner cavity of the battery cylinder. The heat-conducting fire extinguishing material is halogenated alkane. The bottom of the battery cylinder is fixedly connected with a bottom cover 11. The battery cylinder comprises an inner cylinder 1 and an outer cylinder, the inner cylinder 1 is arranged in the inner cylinder of the outer cylinder, the inner cylinder 1 is connected with the outer cylinder through a connecting rib 14, the battery module 6 and the L-shaped adapter row 64 are arranged in the inner cavity of the inner cylinder 1, the inner cylinder 1 and the outer cylinder are fixedly connected with the upper cover plate 4 and the bottom cover 11, and the part, at which the pole 3 is connected with the battery module 6, is arranged in the inner cavity of the inner cylinder 1. The upper cover plate 4 is fixedly connected with the inner cylinder 1 and / or the outer cylinder and / or the connecting rib 14 through screws. The inner cylinder 1 is a square cylinder structure, the outer cylinder is a cylindrical cylinder structure, and the inner cylinder and the outer cylinder are integrally formed through extrusion. The outer side wall of the battery cylinder is provided with an accessory connecting groove 12. The outer side of the battery cylinder is provided with a handle, and the handle is connected with the battery cylinder through the accessory connecting groove 12. The material of the handle is aluminum alloy or steel. The battery module 6 comprises a plurality of parallelly-stacked battery cells 61, the outer side of the battery module 6 is provided with a pressing plate 62, the pressing plate 62 is arranged in parallel with the battery cells 61, and the pressing plate 62 is bundled with the battery module 6 through a bundling belt 63. The pressing plate 62 is an insulating plate, and the material of the insulating plate is one or a combination of two or more of polyvinyl chloride, polypropylene, polystyrene, polyformaldehyde, polymethyl methacrylate, polybutylene terephthalate, polycarbonate or acrylonitrile-butadiene-styrene copolymer. The bundling belt 63 is an insulating bundling belt. The internal resistance and voltage of the plurality of battery cells 61 are the same. One or more battery modules 6 are arranged in the inner cavity of the battery cylinder, if the battery modules 6 are multiple, the multiple battery modules 6 are connected in parallel. The temperature management unit 2 comprises a semiconductor refrigeration assembly 21, a heat equalizing row 22 and a heating sheet 23. The pole 3 is provided with a pole through hole 31 in the length direction, the heat equalizing row 22 is inserted into the pole through hole 31, the heat equalizing row 22 extends to the outer side of the pole through hole 31 and is connected with the semiconductor refrigeration assembly 21, the semiconductor refrigeration assembly 21 is connected with the heating sheet 23, and the semiconductor refrigeration assembly 21 is arranged above the battery cylinder. The heat equalizing row 22 is an L-shaped gravity heat row. The material of the heating sheet 23 is silicone rubber, polyimide or polyacetamide.The heat conduction material is filled between the heat sink 22 and the hole wall of the pole post through hole 31, and the heat conduction material is liquid heat conduction glue or two-component sealing heat conduction glue. The upper layer insulating pad and the lower layer insulating pad are sequentially arranged between the battery cylinder and the semiconductor refrigeration assembly from top to bottom, and the heat sink is arranged between the upper layer insulating pad and the lower layer insulating pad. The material of the lower layer insulating pad 25 is rubber, polypropylene or epoxy resin, and the temperature resistance of the lower layer insulating pad 25 is above 130 DEG C. The material of the upper layer insulating pad 24 is insulating heat conduction silica gel sheet, heat conduction PPS or heat conduction nylon 66, and the temperature resistance of the upper layer insulating pad 24 is above 260 DEG C. The battery cylinder and the upper cover plate 4 are integrally formed by injection molding. The materials of the battery cylinder and the upper cover plate 4 are hydrogenated nitrile rubber, ethylene propylene diene rubber, fluorine rubber, silicone rubber or polypropylene. The upper cover plate 4 is provided with a pressure relief valve 5. The temperature acquisition sensor is connected to the pole post 3, and the temperature acquisition sensor is used to acquire the temperature of the pole post 3. The temperature acquisition sensor is electrically connected to the temperature control unit, and the temperature control unit is connected to the semiconductor refrigeration assembly 21 and the heating sheet 23. The insulating plate is arranged between the pole post 3 and the inner wall of the battery cylinder, and the material of the insulating plate is polyvinyl chloride, polypropylene, polystyrene, polyformaldehyde, polymethyl methacrylate, polybutylene terephthalate, polycarbonate, acrylonitrile-butadiene-styrene copolymer, epoxy resin or rubber.

[0064] Embodiment 1

[0065] Referring to Figure 1 The large-capacity battery structure of the embodiment includes a battery cylinder, a temperature management unit 2, a pole post 3, an upper cover plate 4 and a battery module 6. The battery module 6 is arranged in the inner cavity of the battery cylinder. The top of the battery cylinder is open. The upper cover plate 4 is arranged at the top opening of the battery cylinder. One end of the pole post 3 is connected to the battery module 6. The other end of the pole post 3 extends above the upper cover plate 4 and is connected to the temperature management unit 2. The part of the pole post 3 connected to the battery module 6 is arranged in the inner cavity of the battery cylinder.

[0066] It should be noted that the temperature management unit 2 of the embodiment includes a semiconductor refrigeration assembly 21, a heat sink 22 and a heating sheet 23. The pole post through hole 31 is arranged on the pole post 3 along the length direction. One end of the heat sink 22 is inserted into the pole post through hole 31. The other end of the heat sink 22 extends to the outside of the pole post through hole 31 and is connected to the semiconductor refrigeration assembly 21. The semiconductor refrigeration assembly 21 is connected to the heating sheet 23. The semiconductor refrigeration assembly 21 is arranged above the battery cylinder.

[0067] Preferably, the pole post through hole 31 of the embodiment is arranged at the center position of the pole post 3.

[0068] Preferably, the cross section of the pole post through hole 31 of the embodiment is rectangular.

[0069] Embodiment 2

[0070] Referring to Figure 6 and Figure 7 , the embodiment is a large-capacity battery structure, which is based on the embodiment 1, and an L-shaped adapter row 64 is arranged on the battery module 6, one end surface of the L-shaped adapter row 64 is connected with the battery module 6, and the other end surface of the L-shaped adapter row 64 is connected with the pole 3.

[0071] Preferably, one side surface of the L-shaped adapter row 64 of the embodiment is connected with the battery module 6, and the other inner side surface of the L-shaped adapter row 64 is connected with the pole 3; the current-carrying area between the battery module 6 and the pole 3 is increased through the L-shaped adapter row 64, and the current-carrying capacity is improved.

[0072] Referring to Figure 4 and Figure 5 , the battery module 6 of the embodiment is connected in parallel by a plurality of parallel and stacked battery cells 61, and a pressing plate 62 is arranged on the outer side of the battery module 6; preferably, the pressing plate 62 has two, and the two pressing plates 62 are arranged on the opposite two side portions of the battery module 6; the two pressing plates 62 are arranged in parallel with the battery cells 61, and the two pressing plates 62 and the plurality of battery cells 61 are bundled through a bundling belt 63.

[0073] It should be noted that the number of battery cells 61 on the same battery module 6 of the embodiment can be 3, 5, 8, 10, 15, or even more, and the specific number depends on the capacity requirement of the same battery module 6.

[0074] The pressing plate 62 is an insulating plate, and its specific material can be one or a combination of two or more of polyvinyl chloride, polypropylene, polystyrene, polyformaldehyde, polymethyl methacrylate, polybutylene terephthalate, polycarbonate, or acrylonitrile-butadiene-styrene copolymer; the bundling belt 63 is an insulating bundling belt, or if the bundling belt 63 is of metal material, an insulating layer needs to be coated or sleeved on the outer side of the bundling belt 63.

[0075] Preferably, the internal resistance and voltage of the plurality of battery cells 61 on the same battery module 6 of the embodiment are the same.

[0076] It should be noted that one or more battery modules 6 can be arranged on the same battery cylinder in the embodiment, and if the number of battery modules 6 is multiple, the plurality of battery modules 6 are connected in parallel or in series, preferably, the plurality of battery modules 6 of the embodiment are connected in parallel.

[0077] The battery module 6 of the embodiment is connected with the pole 3 through a fastener; preferably, the fastener is a threaded fastener, specifically, it can be a screw 65, a bolt or a threaded rod, etc., a threaded hole 32 is arranged on the pole 3, and a bolt fixing hole 621 is arranged on the pressing plate 62, the pole 3 is fixedly connected with the pressing plate 62 by sequentially penetrating through the threaded hole 32 and the bolt fixing hole 621 on the pressing plate 62.

[0078] Preferably, the pole 3 of the embodiment is a metal conductive column with a rectangular cross section, and the material of the pole 3 can be aluminum alloy or pure copper.

[0079] Preferably, the L-shaped adapter row 64 of the embodiment is a right-angle L-shaped adapter row.

[0080] Embodiment 3

[0081] The large-capacity battery structure of the embodiment is based on the embodiment 2, and a C-shaped fixing groove 33 is arranged on the pole 3 at the length direction of the opposite two side portions, the C-shaped fixing groove 33 is arranged in parallel with the pole through hole 31, one end of the heat-conducting fire extinguishing pipe is embedded in the C-shaped fixing groove 33, and the other end extends into the inner cavity of the battery cylinder body, a temperature-sensitive valve or a pressure-sensitive valve is arranged on the pipe wall of the heat-conducting fire extinguishing pipe, the temperature-sensitive valve or the pressure-sensitive valve is arranged at the end of the heat-conducting fire extinguishing pipe extending into the inner cavity of the battery cylinder body, and the temperature-sensitive valve or the pressure-sensitive valve opens to release the heat-conducting fire extinguishing medium into the battery when a large amount of heat or high pressure is accumulated in the battery; the pipe cavity of the heat-conducting fire extinguishing pipe is filled with heat-conducting fire extinguishing material, and the heat-conducting fire extinguishing material is halogenated alkane, specifically, it can be one or more of perfluorohexanone, perfluoropentanone, difluoro-chlorobromomethane, tetrachloromethane and trifluoro-bromomethane.

[0082] Preferably, the embodiment is provided with an opening at the bottom of the battery cylinder body, and a bottom cover 11 is arranged at the opening.

[0083] Embodiment 4

[0084] Referring to Figure 2 and Figure 3 , the large-capacity battery structure of the embodiment is based on the embodiment 3, the battery cylinder body includes an inner cylinder 1 and an outer cylinder, the inner cylinder 1 is arranged inside the outer cylinder, the inner cylinder 1 is connected with the outer cylinder through four connecting ribs 14, preferably, the four connecting ribs 14 are uniformly distributed along the circumference between the inner cylinder 1 and the outer cylinder, the battery module 6 and the L-shaped adapter row 64 are arranged in the inner cavity of the inner cylinder 1, and the inner cylinder 1 and the outer cylinder are fixedly connected with the upper cover plate 4 and the bottom cover 11; preferably, a cylinder wall through hole 13 is arranged at the top of the inner cylinder 1 and the top of the outer cylinder, a threaded through hole corresponding to the cylinder wall through hole 13 is arranged on the upper cover plate 4, and a screw is used to fix the upper cover plate 4 with the inner cylinder 1 and the outer cylinder by penetrating through the threaded through hole and the cylinder wall through hole 13; the inner cylinder 1 and the outer cylinder are welded with the bottom cover 11.

[0085] Preferably, the inner cylinder 1 and the outer cylinder are connected with the bottom cover 11 by a sealing treatment, which is a sealing glue or a sealing layer.

[0086] It should be noted that the part of the pole 3 connected with the battery module 6 is placed in the inner cavity of the inner cylinder 1.

[0087] Preferably, the connecting rib 14 of the embodiment is also fixedly connected with the upper cover plate 4 and the bottom cover 11 by screws.

[0088] Preferably, the inner cylinder 1 of the embodiment is a square cylinder structure, and the outer cylinder is a cylindrical cylinder structure; and the inner cylinder 1 and the outer cylinder are integrally extruded.

[0089] Preferably, an insulating plate is arranged between the pole 3 and the inner wall of the battery cylinder (the inner cylinder 1), and the material of the insulating plate is polyvinyl chloride, polypropylene, polystyrene, polyformaldehyde, polymethyl methacrylate, polybutylene terephthalate, polycarbonate, acrylonitrile-butadiene-styrene copolymer, epoxy resin or rubber.

[0090] Embodiment 5

[0091] The battery structure of the embodiment is based on the embodiment 4, and the outer side wall of the battery cylinder is provided with an accessory connecting groove 12, which is preferably arranged on the outer side wall of the outer cylinder.

[0092] The accessory connecting groove 12 is used to connect the fixed connecting piece of the battery.

[0093] Preferably, a handle is arranged on the outer side wall of the battery cylinder, and the handle is fixedly connected with the outer side wall of the battery cylinder through the accessory connecting groove 12. The material of the handle is aluminum alloy or steel.

[0094] Preferably, the accessory connecting groove 12 of the embodiment is a dovetail groove structure.

[0095] It should be noted that the handle of the embodiment can also be fixed on the outer side wall of the outer cylinder by bolt fixing or welding.

[0096] Embodiment 6

[0097] The battery structure of the embodiment is based on the embodiment 5, and the heat equalizing row 22 is an L-shaped gravity heat row; the longer end of the L-shaped gravity heat row is inserted into the pole through hole 31, and the shorter end is arranged above the battery cylinder and connected with the semiconductor refrigeration assembly 21.

[0098] It should be noted that the material of the heating sheet 23 is silicone rubber, polyimide or polyacetamide.

[0099] See Figures 8-10The heat conduction material is filled between the heat sink 22 and the hole wall of the pole post through hole 31, and the heat conduction material is liquid heat conduction glue or two-component sealing heat conduction glue.

[0100] The upper layer insulating pad 24 and the lower layer insulating pad 25 are sequentially arranged between the battery cylinder and the semiconductor refrigeration assembly 21 from top to bottom, and the heat sink 22 is arranged between the upper layer insulating pad 24 and the lower layer insulating pad 25.

[0101] Preferably, the temperature resistance of the lower layer insulating pad 25 is above 130 DEG C, and the material can be rubber, polypropylene or epoxy resin, etc. which can achieve sealing and insulation performance; the temperature resistance of the upper layer insulating pad 24 is above 260 DEG C, and the material can be insulating heat conduction silica gel sheet, heat conduction PPS or heat conduction nylon 66, etc. which can achieve sealing and insulation performance. The heat conduction PPS is polyphenylene sulfide material.

[0102] Embodiment 7

[0103] The battery structure of the embodiment is a large capacity battery structure, and the battery cylinder (including the inner cylinder 1 and the outer cylinder and the upper cover plate 4 are integrally formed by injection molding.

[0104] It should be noted that the material of the battery cylinder and the upper cover plate 4 of the embodiment is hydrogenated nitrile rubber, ethylene propylene terpolymer, fluorine rubber, silicone rubber or polypropylene.

[0105] Preferably, the upper cover plate 4 of the embodiment is provided with a pressure relief valve 5, and the corresponding pressure relief port of the pressure relief valve 5 can be used for vacuumizing, injecting electrolyte and pressure relief; specifically, vacuumizing is performed before injecting electrolyte, electrolyte is filled after vacuumizing, and the pressure relief valve 5 is installed after the electrolyte filling is completed, and pressure relief is performed when the battery works in thermal runaway.

[0106] Embodiment 8

[0107] The battery structure of the embodiment is a large capacity battery structure, and the battery structure of the embodiment is based on the battery structure of the embodiment 7, and the temperature acquisition sensor is connected to the pole post 3, the temperature acquisition sensor is used for acquiring the temperature of the pole post 3, the temperature acquisition sensor is electrically connected with the temperature control unit, and the temperature control unit is electrically connected with the semiconductor refrigeration assembly 21 and the heating sheet 23.

[0108] The above is a further detailed description of the present application in combination with specific preferred embodiments, and is not used to limit the present application. For those skilled in the art, without departing from the concept of the present application, a number of simple deductions or replacements can be made, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be regarded as belonging to the patent protection scope determined by the claims submitted.

Claims

1. A high capacity battery structure, characterized by, The application relates to a battery cylinder, a temperature management unit, a pole, an upper cover plate and a battery module, wherein the battery module is arranged in the inner cavity of the battery cylinder, the upper cover plate is arranged at the top opening of the battery cylinder, the pole is connected with the battery module and extends to the upper cover plate and is connected with the temperature management unit, the temperature management unit comprises a semiconductor refrigeration assembly, a uniform heating row and a heating sheet, the pole is provided with a pole through hole in the length direction, the uniform heating row is inserted into the pole through hole, the uniform heating row extends to the outside of the pole through hole and is connected with the semiconductor refrigeration assembly, the semiconductor refrigeration assembly is connected with the heating sheet, the semiconductor refrigeration assembly is arranged above the battery cylinder, the uniform heating row and the hole wall of the pole through hole are filled with a heat-conducting material, the heat-conducting material is liquid heat-conducting glue or double-component sealing heat-conducting glue, the side of the pole is provided with a C-shaped fixing groove in the length direction, a heat-conducting fire extinguishing pipe is inlaid in the C-shaped fixing groove, the pipe cavity of the heat-conducting fire extinguishing pipe is filled with heat-conducting fire extinguishing material, and the heat-conducting fire extinguishing pipe extends into the inner cavity of the battery cylinder. An L-shaped adapter row is arranged on the battery module, and the battery module is connected with the pole through the L-shaped adapter row.

2. A high capacity battery structure as claimed in claim 1, wherein, One inner side of the L-shaped adapter row is connected with the battery module, and the other inner side of the L-shaped adapter row is connected with the pole.

3. A high capacity battery structure as claimed in claim 2, wherein, The battery module and the pole are fixedly connected through a fastener.

4. A high capacity battery structure as claimed in claim 3, wherein, The heat-conducting fire extinguishing material is halogenated alkane.

5. A high capacity battery structure as claimed in claim 4, wherein, The bottom of the battery cylinder is fixedly connected with a bottom cover.

6. A high capacity battery structure as claimed in claim 5, wherein, The battery cylinder comprises an inner cylinder and an outer cylinder, the inner cylinder is arranged inside the outer cylinder, the inner cylinder is connected with the outer cylinder through a connecting rib, the battery module and the L-shaped adapter row are arranged in the inner cavity of the inner cylinder, and the inner cylinder and the outer cylinder are fixedly connected with the upper cover plate and the bottom cover.

7. A high capacity battery structure as claimed in claim 6, wherein, The upper cover plate is fixedly connected with the inner cylinder and / or the outer cylinder and / or the connecting rib through screws.

8. A high capacity battery structure as claimed in claim 7, wherein, The inner cylinder is a square cylinder structure, the outer cylinder is a cylindrical cylinder structure, and the inner cylinder and the outer cylinder are integrally formed through extrusion.

9. A high capacity battery structure as claimed in claim 8, wherein, The outer side wall of the battery cylinder is provided with an accessory connecting groove.

10. A high capacity battery structure as claimed in claim 9, wherein, The outer side of the battery cylinder is provided with a handle, and the handle is connected with the battery cylinder through the accessory connecting groove.

11. A high capacity battery structure as claimed in claim 10, wherein, The material of the handle is aluminum alloy or steel.

12. A high capacity battery structure as claimed in claim 11, wherein, The battery module comprises a plurality of parallel and stacked battery cells, the outer side of the battery module is provided with a pressing plate, the pressing plate is arranged in parallel with the battery cells, and the pressing plate and the battery module are bundled through a bundling belt.

13. A high capacity battery structure as claimed in claim 12, wherein, The pressing plate is an insulating plate, the material of the insulating plate is one or a combination of two or more of polyvinyl chloride, polypropylene, polystyrene, polyformaldehyde, polymethyl methacrylate, polybutylene terephthalate, polycarbonate or acrylonitrile-butadiene-styrene copolymer, and the bundling belt is an insulating bundling belt.

14. A high capacity battery structure as claimed in claim 13, wherein, The internal resistance and voltage of the plurality of battery cells are the same.

15. A high capacity battery structure as claimed in claim 14, wherein, One or more battery modules are arranged in the inner cavity of the battery cylinder, and if the battery modules are multiple, the multiple battery modules are connected in parallel.

16. A high capacity battery structure as claimed in claim 15, wherein, The uniform heating row is an L-shaped gravity heating row.

17. A high capacity battery structure as claimed in claim 16, wherein, The material of the heating sheet is silicone rubber, polyimide or polyacetamide.

18. A high capacity battery structure as claimed in claim 17, wherein, An upper insulating pad and a lower insulating pad are sequentially arranged between the battery cylinder and the semiconductor refrigeration assembly from top to bottom, and the uniform heating row is arranged between the upper insulating pad and the lower insulating pad.

19. A high capacity battery structure as claimed in claim 18, wherein, ​ 20. A high capacity battery structure according to claim 19, wherein, The material of the lower insulating pad is rubber, polypropylene or epoxy resin, and the temperature resistance of the lower insulating pad is above 130 DEG C; the material of the upper insulating pad is insulating heat-conducting silica gel sheet, heat-conducting PPS or heat-conducting nylon 66, and the temperature resistance of the upper insulating pad is above 260 DEG C.

21. A high capacity battery structure according to claim 20, wherein, The battery cylinder and the upper cover plate are integrally formed by injection molding.

22. A high capacity battery structure according to claim 21, wherein, The material of the battery cylinder and the upper cover plate is hydrogenated nitrile rubber, ethylene-propylene-diene rubber, fluorine rubber, silicone rubber or polypropylene.

23. A high capacity battery structure according to claim 22, wherein, The upper cover plate is provided with a pressure relief valve.

24. A high capacity battery structure according to claim 23, wherein, A temperature acquisition sensor is connected to the pole, the temperature acquisition sensor is used for acquiring the temperature of the pole, the temperature acquisition sensor is electrically connected with a temperature control unit, and the temperature control unit is connected with a semiconductor refrigeration assembly and a heating sheet.

25. A high capacity battery structure according to claim 24, wherein, An insulating plate is arranged between the pole and the inner wall of the battery cylinder, and the material of the insulating plate is polyvinyl chloride, polypropylene, polystyrene, polyformaldehyde, polymethyl methacrylate, polybutylene terephthalate, polycarbonate, acrylonitrile-butadiene-styrene copolymer, epoxy resin or rubber.

Images