energy storage device

Abstract

The utility model provides a kind of energy storage equipment, it is related to energy storage equipment technical field, and energy storage equipment includes: battery box, battery module is equipped in battery box;Inverter box is connected with battery box, inverter box is equipped with inverter assembly;Battery pressing plate is connected with battery box;At least one semiconductor refrigeration sheet is located in battery pressing plate;Among them, semiconductor refrigeration sheet has hot end and cold end, hot end is equipped in battery box, for heating battery module;Cold end is equipped in inverter box, for cooling inverter assembly.The utility model's technical scheme, according to the feature that semiconductor refrigeration sheet can cool down on one side, heat dissipation on one side, two sets of thermal management system are combined into a set of thermal management system.Semiconductor refrigeration sheet is used to replace heating film and fan in conventional technology, which is conducive to reducing the number of parts and occupying space, higher integration, and overall structure is more compact.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and more specifically, to an energy storage device. Background Technology

[0002] Energy storage devices are devices that store electrical energy through specific energy storage media (such as electrochemical batteries) and can release the stored electrical energy for external use as needed. Their core function is to realize the transfer and supply and demand regulation of electrical energy, and they are widely used in emergency power supply and mobile energy scenarios.

[0003] In related technologies, energy storage devices include a battery system and an inverter system, and have two thermal management systems. One thermal management system is the inverter cooling system, which typically includes an internal fan and an external heat sink. The other thermal management system is the battery heating system, which usually uses a heating film to heat the battery.

[0004] The limitation of this design approach is that the thermal management system of energy storage devices requires many components and occupies a large space. Utility Model Content

[0005] In order to solve or improve the technical problem that the thermal management system of existing energy storage equipment requires a large number of components and occupies a large space, the purpose of this utility model is to provide an energy storage device.

[0006] To achieve the above objectives, this utility model provides an energy storage device, comprising: a battery housing containing battery modules; an inverter housing connected to the battery housing, containing an inverter assembly; a battery pressure plate connected to the battery housing; and at least one semiconductor cooling chip disposed on the battery pressure plate; wherein the semiconductor cooling chip has a hot end and a cold end, the hot end being disposed in the battery housing for heating the battery modules; and the cold end being disposed in the inverter housing for cooling the inverter assembly.

[0007] This invention aims to provide an energy storage device that combines two thermal management systems into one, based on the characteristic of a thermoelectric cooler that can simultaneously cool and dissipate heat. The battery module is heated by the hot end of the thermoelectric cooler, while the inverter components are cooled by the cold end. This design, using a thermoelectric cooler instead of the heating film and fan in traditional technology, reduces the number of components and space required, resulting in higher integration and a more compact overall structure.

[0008] It should be noted that cooling the inverter components through the cold end of the thermoelectric cooler can dissipate the heat generated by the power devices in a timely manner, ensuring the conversion efficiency of the inverter components and effectively preventing thermal breakdown, thus maintaining the inverter system within a safe operating temperature range. Heating the battery module through the hot end of the thermoelectric cooler allows the battery system to operate within a suitable temperature range, which helps ensure the output performance of the energy storage device, extends the lifespan of the battery module, and reduces safety hazards.

[0009] In some technical solutions, optionally, the battery box has a first opening on the side facing the inverter box; a battery pressure plate is provided in the first opening; at least a portion of the battery pressure plate abuts against the battery module to limit the battery module.

[0010] In this technical solution, by setting a battery pressure plate, firstly, it serves as a mounting carrier for the thermoelectric cooler, ensuring that the hot end of the thermoelectric cooler can extend into the battery box and the cold end of the thermoelectric cooler can extend into the inverter box; secondly, it can limit the battery module and improve the connection strength between the battery module and the battery box.

[0011] In some technical solutions, optionally, the inverter box has a second opening on the side facing the battery box, and the second opening is connected to the first opening; the semiconductor cooling chip passes through both sides of the battery pressure plate so that the hot end is located in the battery box and the cold end is located in the inverter box.

[0012] In this technical solution, the battery pressure plate is located at the first opening, and the thermoelectric cooler extends through both sides of the battery pressure plate. By optimizing the spatial layout of the battery pressure plate and the thermoelectric cooler, it is ensured that the hot end of the thermoelectric cooler can extend into the battery housing, and the cold end of the thermoelectric cooler can extend into the inverter housing, which is beneficial to improving the heating and cooling effects of the thermoelectric cooler.

[0013] In some technical solutions, optionally, an insulating sheet is provided between the thermoelectric cooler and the battery pressure plate, and the thermoelectric cooler is connected to the battery pressure plate through the insulating sheet.

[0014] In this technical solution, by incorporating an insulating sheet, the electrical connection between the thermoelectric cooler and the metal battery platen can be blocked, while also withstanding the pressure during installation and temperature changes during equipment operation. This design ensures the long-term stable operation of the thermoelectric cooler and helps to extend its service life.

[0015] In some technical solutions, optionally, the insulating sheet is provided with at least one first mounting groove, and each thermoelectric cooler is embedded in a corresponding first mounting groove.

[0016] In this technical solution, embedding the thermoelectric cooler in the first mounting groove improves the connection strength between the thermoelectric cooler and the battery platen. Under conditions such as bumpy transport of energy storage equipment or outdoor wind vibration, it effectively avoids problems such as hot-end detachment and cold-end displacement caused by loosening of the thermoelectric cooler, ensuring the long-term stable operation of the thermal management system.

[0017] In some technical solutions, optionally, the battery platen is provided with at least one second mounting groove; each first mounting groove is embedded in a corresponding second mounting groove.

[0018] In this technical solution, the insulating sheet positions the thermoelectric cooler via a first mounting groove, and then achieves secondary positioning by embedding itself into a second mounting groove on the battery pressure plate. This design improves the installation accuracy of the insulating sheet and the thermoelectric cooler, reducing assembly errors. Under conditions such as bumpy transportation of energy storage equipment or outdoor wind vibration, it effectively avoids problems such as hot-end detachment and cold-end displacement caused by loosening of the thermoelectric cooler, ensuring the long-term stable operation of the thermal management system.

[0019] In some technical solutions, optionally, the surface of the battery module is provided with an insulating thermal pad; the hot end abuts against the insulating thermal pad.

[0020] In this technical solution, the use of an insulating thermally conductive pad increases the contact area between the hot end of the thermoelectric cooler and the battery module, thereby improving the heating effect of the thermoelectric cooler on the battery module. The insulating thermally conductive pad, with its high insulation performance, blocks the leakage path between the hot end of the thermoelectric cooler and the aluminum busbar of the battery module, avoiding risks such as device burnout and electric shock caused by high and low voltage crosstalk.

[0021] In some technical solutions, the inverter assembly optionally includes: an auxiliary power supply electrically connected to the thermoelectric cooler, the auxiliary power supply being used to provide electrical energy to the thermoelectric cooler.

[0022] In this technical solution, the auxiliary power supply, as an independent DC regulated power supply module, can stabilize the fluctuating voltage output by the battery system to the rated operating voltage of the thermoelectric cooler, thus avoiding unstable cooling or heating power caused by voltage fluctuations.

[0023] In some technical solutions, optionally, a control switch is provided in the power supply path between the auxiliary power supply and the thermoelectric cooler; the inverter assembly also includes a control module electrically connected to the control switch.

[0024] In this technical solution, by setting up a control module and a control switch, the thermoelectric cooler only starts supplying power when the battery module needs heating or the inverter components need heat dissipation, and remains powered off at other times. Compared with the traditional design method of continuous power supply, this approach helps reduce the power consumption of the energy storage device and improves energy utilization efficiency.

[0025] In some technical solutions, optionally, a temperature sensor is also installed inside the battery box, and the temperature sensor is electrically connected to the control module.

[0026] In this technical solution, a temperature sensor is used to acquire the battery temperature of the battery module. The control module acquires the battery temperature of the battery module through the temperature sensor and, based on the battery temperature, controls a switch to either connect or disconnect the power supply path between the auxiliary power supply and the thermoelectric cooler. This design allows for precise determination of when the battery module needs heating, preventing the thermoelectric cooler from being powered on for extended periods, thereby reducing the power consumption of the energy storage device itself.

[0027] Additional aspects and advantages of the present invention will become apparent in the following description or may be learned by practice of the present invention. Attached Figure Description

[0028] Figure 1 An exploded view of an energy storage device according to an embodiment of the present invention is shown;

[0029] Figure 2 An exploded view of an energy storage device according to another embodiment of the present invention is shown;

[0030] Figure 3 A schematic diagram of a battery case according to an embodiment of the present invention is shown;

[0031] Figure 4 An exploded view of a battery housing according to an embodiment of the present invention is shown;

[0032] Figure 5 A circuit diagram of an energy storage device according to an embodiment of the present invention is shown.

[0033] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0034] 1: Energy storage device; 10: Battery housing; 102: First opening; 11: Battery module; 112: Aluminum busbar; 12: Inverter housing; 122: Second opening; 13: Inverter assembly; 131: Auxiliary power supply; 132: Control module; 133: Power board; 134: Power supply path; 135: Control switch; 14: Battery pressure plate; 142: Second mounting slot; 15: Semiconductor cooling chip; 152: Hot end; 154: Cold end; 16: Insulating sheet; 162: First mounting slot; 171: Insulating thermal pad; 172: Buffer foam; 18: Temperature sensor. Detailed Implementation

[0035] To better understand the above-mentioned objectives, features, and advantages of the embodiments of this utility model, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, embodiments of the present invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0037] Energy storage devices are devices that store electrical energy through specific energy storage media (such as electrochemical batteries) and can release the stored electrical energy for external use as needed. Their core function is to realize the transfer and supply and demand regulation of electrical energy, and they are widely used in emergency power supply and mobile energy scenarios.

[0038] In energy storage devices, the battery system and the inverter system are the two core components. Both have specific requirements for operating temperature, so they are usually configured with two independent thermal management systems.

[0039] The core function of an inverter system is to convert the direct current (DC) output from the battery system into alternating current (AC) that can be directly supplied to the load. During this conversion process, the power devices within the inverter generate a significant amount of heat due to conduction and switching losses. If this heat cannot be dissipated in time, it will cause the temperature of electronic components to rise, which may reduce conversion efficiency or even lead to thermal breakdown of electronic components, causing inverter system failure. Therefore, a dedicated inverter cooling system (usually including an internal fan and an external heat sink) is required for forced cooling to maintain the inverter operating within a safe operating temperature range.

[0040] As an energy storage medium, the performance of a battery system is closely related to its operating temperature. Taking a commonly used lithium-ion battery as an example, when the ambient temperature is too low (usually below 0°C), the migration rate of electrolyte ions inside the battery decreases significantly, the electrochemical activity of the electrode materials decreases, leading to a decrease in the battery's charge and discharge capacity and an increase in internal resistance. This not only affects the output performance of the energy storage device but may also shorten the battery's lifespan and even cause safety hazards. Therefore, a dedicated battery heating system (usually using a heating film) is needed to actively heat the battery to ensure that it operates within a suitable temperature range.

[0041] However, this design with two independent thermal management systems has obvious limitations: the thermal management system of the energy storage device requires many components and occupies a large space.

[0042] This invention aims to provide an energy storage device that combines two thermal management systems into one, based on the characteristic of a thermoelectric cooler that can simultaneously cool and dissipate heat. The battery module is heated by the hot end of the thermoelectric cooler, while the inverter components are cooled by the cold end. This design, using a thermoelectric cooler instead of the heating film and fan in traditional technology, reduces the number of components and space required, resulting in higher integration and a more compact overall structure.

[0043] It should be noted that cooling the inverter components through the cold end of the thermoelectric cooler can dissipate the heat generated by the power devices in a timely manner, ensuring the conversion efficiency of the inverter components and effectively preventing thermal breakdown, thus maintaining the inverter system within a safe operating temperature range. Heating the battery module through the hot end of the thermoelectric cooler allows the battery system to operate within a suitable temperature range, which helps ensure the output performance of the energy storage device, extends the lifespan of the battery module, and reduces safety hazards.

[0044] The following reference Figures 1 to 5 This invention describes an energy storage device provided according to some embodiments of the present invention.

[0045] In one embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the energy storage device 1 includes a battery housing 10, an inverter housing 12, a battery pressure plate 14, and a semiconductor cooling chip 15.

[0046] A battery module 11 is housed inside the battery housing 10. An inverter housing 12 is connected to the battery housing 10, and an inverter assembly 13 is housed inside the inverter housing 12. A battery pressure plate 14 is connected to the battery housing 10. At least one thermoelectric cooler 15 is disposed on the battery pressure plate 14.

[0047] like Figure 4 As shown, the thermoelectric cooler 15 has a hot end 152 and a cold end 154. The hot end 152 is located inside the battery housing 10 and is used to heat the battery module 11; the cold end 154 is located inside the inverter housing 12 and is used to cool the inverter assembly 13.

[0048] As an energy storage carrier, the performance of the battery module 11 is closely related to its operating temperature. Heating the battery module 11 through the hot end 152 of the semiconductor cooling chip 15 ensures that the battery system operates within a suitable temperature range, which helps to ensure the output performance of the energy storage device 1, extend the service life of the battery module 11, and reduce safety hazards.

[0049] Inverter assembly 13 is electrically connected to battery module 11 to convert direct current (DC) into alternating current (AC) that can be directly supplied to the load. During the energy conversion process, the power devices (such as power board 133) in inverter assembly 13 generate a large amount of heat due to conduction and switching losses. Cooling inverter assembly 13 through the cold junction 154 of semiconductor cooling chip 15 can dissipate the heat generated by the power devices in a timely manner, ensuring the conversion efficiency of inverter assembly 13, effectively preventing thermal breakdown, and maintaining the inverter system operating within a safe operating temperature range.

[0050] The battery pressure plate 14 has two main functions: first, to limit the position of the battery module 11; and second, to serve as a mounting carrier for the semiconductor cooling chip 15.

[0051] The thermoelectric cooler 15 (TEC) is a sheet-like device formed by alternating series connection of two semiconductor materials with different thermoelectric properties between an insulating ceramic substrate and metal conductive plates. The hot end 152 of the thermoelectric cooler 15 is used to heat the battery module 11, and the cold end 154 of the thermoelectric cooler 15 is used to cool the inverter assembly 13.

[0052] This invention aims to provide an energy storage device 1 that combines two thermal management systems into one, based on the characteristic that the thermoelectric cooler 15 can simultaneously cool and dissipate heat. The battery module 11 is heated via the hot end 152 of the thermoelectric cooler 15, while the inverter assembly 13 is cooled via the cold end 154 of the thermoelectric cooler 15. This design, using the thermoelectric cooler 15 to replace the heating film and fan in traditional technology, helps reduce the number of components and space occupied, resulting in higher integration and a more compact overall structure.

[0053] It should be noted that cooling the inverter assembly 13 via the cold end 154 of the thermoelectric cooler 15 can dissipate the heat generated by the power devices in a timely manner, ensuring the conversion efficiency of the inverter assembly 13 and effectively preventing thermal breakdown, thus maintaining the inverter system within a safe operating temperature range. Heating the battery module 11 via the hot end 152 of the thermoelectric cooler 15 ensures that the battery system operates within a suitable temperature range, which helps ensure the output performance of the energy storage device 1, extends the service life of the battery module 11, and reduces safety hazards.

[0054] In some embodiments, the battery pressure plate 14 and the battery housing 10 are optionally detachably connected, which facilitates disassembly and assembly by staff and is beneficial for maintenance or replacement.

[0055] In some embodiments, the battery pressure plate 14 and the battery housing 10 are optionally detachably connected by a first connector. When the battery pressure plate 14 and the battery housing 10 are connected, the first connector passes through the battery pressure plate 14 and the battery housing 10.

[0056] It should be noted that the number of first connectors is at least one; that is, there can be one, two, or more first connectors, and the first connectors can be flexibly set according to actual needs.

[0057] In one specific embodiment, the first connector is a bolt.

[0058] In one specific embodiment, the first connector is a screw.

[0059] In one specific embodiment, the first connector is a pin.

[0060] In some embodiments, the battery pressure plate 14 and the battery housing 10 are optionally detachably connected by a snap-fit ​​structure.

[0061] One of the battery pressure plate 14 and the battery housing 10 is provided with a first groove, and the other is provided with a first protrusion. The battery pressure plate 14 and the battery housing 10 are detachably connected through the mutual cooperation of the first groove and the first protrusion.

[0062] When the battery pressure plate 14 and the battery housing 10 are connected, the first protrusion is engaged inside the first groove.

[0063] In one specific embodiment, the battery pressure plate 14 is provided with a first groove, and the battery housing 10 is provided with a first protrusion.

[0064] In one specific embodiment, the battery pressure plate 14 is provided with a first protrusion, and the battery housing 10 is provided with a first groove.

[0065] In some embodiments, the battery housing 10 and the inverter housing 12 are optionally detachably connected, which facilitates disassembly and assembly by staff to maintain or replace the electronic components inside the battery housing 10 or the inverter housing 12.

[0066] In some embodiments, the battery housing 10 and the inverter housing 12 are optionally detachably connected via a second connector. When the battery housing 10 and the inverter housing 12 are connected, the second connector passes through both the battery housing 10 and the inverter housing 12.

[0067] In one specific embodiment, the second connector is a bolt.

[0068] In one specific embodiment, the second connector is a screw.

[0069] In one specific embodiment, the second connector is a pin.

[0070] In some embodiments, the battery housing 10 and the inverter housing 12 are optionally detachably connected by a snap-fit ​​structure.

[0071] One of the battery housing 10 and the inverter housing 12 is provided with a second groove, and the other is provided with a second protrusion. The battery housing 10 and the inverter housing 12 are detachably connected by the cooperation of the second groove and the second protrusion.

[0072] In one specific embodiment, the battery housing 10 is provided with a second groove, and the inverter housing 12 is provided with a second protrusion.

[0073] In one specific embodiment, the battery housing 10 is provided with a second protrusion, and the inverter housing 12 is provided with a second groove.

[0074] In some embodiments, the battery module 11 may optionally include a plurality of connected battery cells. The plurality of battery cells may be connected in series or in parallel.

[0075] like Figure 4 As shown, the battery module 11 also includes an aluminum busbar 112. Multiple battery cells are connected in series or in parallel through the aluminum busbar 112.

[0076] As a low-impedance conductive medium, the aluminum busbar 112 can efficiently converge the current of multiple battery cells (increasing the total capacity when connected in parallel) or form a voltage superposition (increasing the total voltage when connected in series). It can also be connected to external circuits (such as inverter assembly 13 and battery management module) through the lead-out terminals of the aluminum busbar 112 to ensure stable current transmission.

[0077] In addition, the aluminum busbar 112 has excellent thermal conductivity. The aluminum busbar 112, which is attached to the surface of the battery cell, can quickly dissipate the heat generated by the battery cell during operation to the entire battery module 11, avoiding local overheating.

[0078] In some embodiments, optionally, such as Figure 1 As shown, the inverter assembly 13 includes a power board 133. During the power conversion process of the inverter assembly 13, the power board 133 generates a large amount of heat. By cooling the inverter assembly 13 through the cold end 154 of the thermoelectric cooler 15, the heat generated by the power board 133 can be dissipated in a timely manner, ensuring the conversion efficiency of the inverter assembly 13.

[0079] In some embodiments, optionally, the battery housing 10 is further provided with cushioning foam 172. The cushioning foam 172 is used to abut against the inner wall of the battery housing 10 and against the battery module 11.

[0080] The advantages of setting up the buffer foam 172 are as follows: First, as a flexible buffer layer, the buffer foam 172 can absorb the stress of mechanical vibration and thermal expansion, which is conducive to improving the service life of the energy storage device 1; Second, the buffer foam 172 can limit the battery module 11 to a certain extent; Third, the buffer foam 172 can block the leakage path between the battery module 11 and the battery box 10, and the insulation isolation is highly reliable.

[0081] In some embodiments, optionally, such as Figure 2 , Figure 3 and Figure 4 As shown, the battery housing 10 has a first opening 102 on the side facing the inverter housing 12. A battery pressure plate 14 is provided in the first opening 102. At least a portion of the battery pressure plate 14 abuts against the battery module 11 to limit the battery module 11.

[0082] By setting the battery pressure plate 14, firstly, it serves as a mounting carrier for the thermoelectric cooler 15, ensuring that the hot end 152 of the thermoelectric cooler 15 can extend into the battery housing 10 and the cold end 154 of the thermoelectric cooler 15 can extend into the inverter housing 12; secondly, it can limit the battery module 11, thereby improving the connection strength between the battery module 11 and the battery housing 10.

[0083] In addition, by placing the battery pressure plate 14 in the first opening 102 of the battery housing 10, it is beneficial to optimize the spatial layout, ensure that the hot end 152 of the semiconductor cooling chip 15 can extend into the battery housing 10, and the cold end 154 of the semiconductor cooling chip 15 can extend into the inverter housing 12.

[0084] In some embodiments, the battery pressure plate 14 can be of any shape, such as a triangle, rectangle, ellipse, circle, pentagon, or hexagon, and the shape of the battery pressure plate 14 can be flexibly set according to actual needs.

[0085] In some embodiments, the number of battery pressure plates 14 may be at least one, that is, there may be one, two or more battery pressure plates 14. The number of battery pressure plates 14 may be flexibly set according to actual needs, taking into account the limiting effect on the battery module 11, the size of the space occupied, the cost and other factors.

[0086] In some embodiments, the number of thermoelectric coolers 15 may be at least one, that is, there may be one, two or more thermoelectric coolers 15. The number of thermoelectric coolers 15 may be flexibly set according to actual needs, taking into account the heating effect on the battery module 11, the cooling effect on the inverter assembly 13, the space occupied, the cost and other factors.

[0087] In one specific embodiment, there is one battery pressure plate 14. There are two semiconductor cooling chips 15.

[0088] In some embodiments, optionally, such as Figure 1 As shown, the inverter housing 12 has a second opening 122 on the side facing the battery housing 10, and the second opening 122 is connected to the first opening 102; the semiconductor cooling chip 15 passes through both sides of the battery pressure plate 14 so that the hot end 152 is located inside the battery housing 10 and the cold end 154 is located inside the inverter housing 12.

[0089] Optionally, the position of the first opening 102 of the battery box 10 and the position of the second opening 122 of the inverter box 12 are sealed together by a sealing strip or flange structure.

[0090] A battery pressure plate 14 is located at the first opening 102, and a thermoelectric cooler 15 extends through both sides of the battery pressure plate 14. By optimizing the spatial layout of the battery pressure plate 14 and the thermoelectric cooler 15, it is ensured that the hot end 152 of the thermoelectric cooler 15 can extend into the battery housing 10, and the cold end 154 of the thermoelectric cooler 15 can extend into the inverter housing 12, which is beneficial to improving the heating and cooling effect of the thermoelectric cooler 15.

[0091] In some embodiments, optionally, such as Figure 4 As shown, an insulating sheet 16 is provided between the semiconductor cooling chip 15 and the battery pressure plate 14, and the semiconductor cooling chip 15 is connected to the battery pressure plate 14 through the insulating sheet 16.

[0092] Optionally, the insulating sheet 16 is made of an insulating material that is resistant to high temperatures and has a certain mechanical strength. Optionally, the insulating sheet 16 is made of glass fiber reinforced epoxy resin board (FR-4) or polyimide film (Kapton).

[0093] It should be noted that in FR-4, "FR" stands for Flame Retardant, and "4" represents the material number.

[0094] By incorporating the insulating sheet 16, the electrical connection between the thermoelectric cooler 15 and the metal battery plate 14 can be blocked, while also withstanding the pressure during installation and temperature changes during equipment operation. This design ensures the long-term stable operation of the thermoelectric cooler 15 and helps to extend its service life.

[0095] In some embodiments, optionally, such as Figure 4 As shown, the insulating sheet 16 is provided with at least one first mounting groove 162, and each semiconductor cooling chip 15 is embedded in a corresponding first mounting groove 162.

[0096] It should be emphasized that the number of first mounting slots 162 is at least one, that is, there can be one, two or more first mounting slots 162, which can be flexibly set according to actual needs. Optionally, the number of first mounting slots 162 is the same as the number of thermoelectric coolers 15, and each thermoelectric cooler 15 is embedded in a corresponding first mounting slot 162.

[0097] By embedding the thermoelectric cooler 15 into the first mounting groove 162, the connection strength between the thermoelectric cooler 15 and the battery plate 14 is improved. Under conditions such as bumpy transportation of the energy storage device 1 or outdoor wind vibration, problems such as the hot end 152 detaching and the cold end 154 shifting due to the loosening of the thermoelectric cooler 15 can be effectively avoided, ensuring the long-term stable operation of the thermal management system.

[0098] In some embodiments, optionally, a first thermally conductive insulating layer is provided between the sidewall of the semiconductor cooling chip 15 and the groove wall of the first mounting groove 162 to fill the tiny gap between the semiconductor cooling chip 15 and the groove wall.

[0099] In some embodiments, the groove wall of the first mounting groove 162 is provided with a first wear-resistant layer, which helps to improve the wear resistance and thus improve the service life of the insulating sheet 16.

[0100] In some embodiments, optionally, such as Figure 4 As shown, the battery pressure plate 14 is provided with at least one second mounting groove 142. Each first mounting groove 162 is embedded in a corresponding second mounting groove 142.

[0101] It should be emphasized that the number of second mounting slots 142 is at least one, that is, there can be one, two or more second mounting slots 142, which can be flexibly set according to actual needs. Optionally, the number of second mounting slots 142 is the same as the number of first mounting slots 162, and each first mounting slot 162 is embedded in a corresponding second mounting slot 142.

[0102] By providing a second mounting groove 142 on the battery pressure plate 14, and embedding the first mounting groove 162 within the second mounting groove 142, it is beneficial to improve the installation accuracy of the insulating sheet 16 and reduce assembly errors.

[0103] The insulating sheet 16 positions the thermoelectric cooler 15 via the first mounting groove 162, and then achieves secondary positioning by embedding itself into the second mounting groove 142 of the battery pressure plate 14. This design helps improve the installation accuracy of the insulating sheet 16 and the thermoelectric cooler 15, and reduces assembly errors. Under conditions such as transportation bumps or outdoor wind vibrations of the energy storage device 1, it can effectively avoid problems such as the hot end 152 detaching and the cold end 154 shifting due to the loosening of the thermoelectric cooler 15, ensuring the long-term stable operation of the thermal management system.

[0104] In some embodiments, optionally, a second thermally conductive insulating layer is provided between the outer wall of the first mounting groove 162 and the inner wall of the second mounting groove 142 to fill the minute gap between the outer wall of the first mounting groove 162 and the inner wall of the second mounting groove 142.

[0105] In some embodiments, the groove wall of the second mounting groove 142 is provided with a second wear-resistant layer, which helps to improve the wear resistance and thus improve the service life of the battery pressure plate 14.

[0106] In some embodiments, optionally, such as Figure 4 As shown, the surface of the battery module 11 is provided with an insulating thermal pad 171; the hot end 152 abuts against the insulating thermal pad 171.

[0107] By setting up the insulating thermal pad 171, the contact area between the hot end 152 of the thermoelectric cooler 15 and the battery module 11 is increased, which helps to improve the heating effect of the thermoelectric cooler 15 on the battery module 11. The insulating thermal pad 171 blocks the leakage path between the hot end 152 of the thermoelectric cooler 15 and the aluminum busbar 112 of the battery module 11 through its high insulation performance, avoiding the risks of device burnout, electric shock and other problems caused by high and low voltage crosstalk.

[0108] In addition, the insulating thermal pad 171, as a flexible buffer layer, can absorb the stress of mechanical vibration and thermal expansion, which is beneficial to improving the service life of the semiconductor cooling chip 15, so as to enable the energy storage device 1 to operate stably for a long time.

[0109] In some embodiments, the insulating thermal pad 171 may optionally be made of a silicone-based thermally conductive composite material (such as silicone rubber with added alumina and boron nitride ceramic particles).

[0110] In some embodiments, optionally, such as Figure 5 As shown, the inverter assembly 13 includes an auxiliary power supply 131. The auxiliary power supply 131 is electrically connected to the thermoelectric cooler 15 and is used to provide electrical energy to the thermoelectric cooler 15.

[0111] As an independent DC regulated power supply module, the auxiliary power supply 131 can stabilize the fluctuating voltage output by the battery system to the rated operating voltage (e.g., 12V) of the semiconductor cooling chip 15, thus avoiding unstable cooling or heating power caused by voltage fluctuations.

[0112] It should be noted that "V" is the unit of voltage, representing volts.

[0113] In some embodiments, optionally, such as Figure 5 As shown, a control switch 135 is provided in the power supply path 134 between the auxiliary power supply 131 and the semiconductor cooling chip 15.

[0114] The inverter assembly 13 also includes a control module 132. The control module 132 is electrically connected to the control switch 135.

[0115] By setting up control module 132 and control switch 135, the thermoelectric cooler 15 only starts supplying power when the battery module 11 needs to be heated or the inverter assembly 13 needs to dissipate heat (cool down), and remains in a power-off state at other times. Compared with the traditional design method of being powered on for a long time, this design method is beneficial to reduce the power consumption of the energy storage device 1 and improve energy utilization efficiency.

[0116] In some embodiments, optionally, such as Figure 5 As shown, a temperature sensor 18 is also provided inside the battery box 10, and the temperature sensor 18 is electrically connected to the control module 132.

[0117] Temperature sensor 18 is used to acquire the battery temperature of battery module 11. Control module 132 acquires the battery temperature of battery module 11 through temperature sensor 18, and controls switch 135 to either connect or disconnect the power supply path 134 between auxiliary power supply 131 and thermoelectric cooler 15 based on the battery temperature. This design allows for precise timing of heating of battery module 11, preventing thermoelectric cooler 15 from being powered on for extended periods, thereby reducing the power consumption of energy storage device 1.

[0118] If the battery temperature is lower than the first preset threshold, it indicates that the temperature of the battery module 11 is too low. The control module 132 closes the control switch 135 to generate a drive signal, and the hot end 152 of the semiconductor cooling chip 15 heats the battery module 11.

[0119] If the battery temperature exceeds the second preset threshold, the hot end 152 of the thermoelectric cooler 15 is not required to heat the battery module 11, and the control switch 135 is turned off by the control module 132. The second preset threshold is greater than the first preset threshold.

[0120] In one specific embodiment, the first preset threshold is 0°C.

[0121] In one specific embodiment, the second preset threshold is 20°C.

[0122] It should be noted that, in Figure 5 In this diagram, MCU (Microcontroller Unit) represents the control module 132. NTC (Negative Temperature Coefficient) represents the temperature sensor 18. "Q1" represents the control switch 135. "VCC1" represents the auxiliary power supply 131, where "+" indicates the positive terminal and "-" indicates the negative terminal.

[0123] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0124] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0125] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0126] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An energy storage device, characterized in that, include: A battery housing, wherein a battery module is installed inside the battery housing; An inverter enclosure is connected to the battery enclosure, and an inverter assembly is installed inside the inverter enclosure; A battery pressure plate is connected to the battery housing. At least one semiconductor cooling chip is disposed on the battery pressure plate; The semiconductor cooling chip has a hot end and a cold end. The hot end is located inside the battery housing and is used to heat the battery module. The cold end is located inside the inverter housing and is used to cool the inverter assembly.

2. The energy storage device according to claim 1, characterized in that, The battery box has a first opening on the side facing the inverter box; The battery pressure plate is disposed at the first opening; at least a portion of the battery pressure plate abuts against the battery module to limit the position of the battery module.

3. The energy storage device according to claim 2, characterized in that, The inverter housing has a second opening on the side facing the battery housing, and the second opening is connected to the first opening; The semiconductor cooling chip extends through both sides of the battery pressure plate, so that the hot end is located inside the battery housing and the cold end is located inside the inverter housing.

4. The energy storage device according to claim 3, characterized in that, An insulating sheet is provided between the semiconductor cooling chip and the battery pressure plate, and the semiconductor cooling chip is connected to the battery pressure plate through the insulating sheet.

5. The energy storage device according to claim 4, characterized in that, The insulating sheet is provided with at least one first mounting groove, and each of the semiconductor cooling chips is embedded in a corresponding first mounting groove.

6. The energy storage device according to claim 5, characterized in that, The battery plate is provided with at least one second mounting slot; Each of the first mounting slots is embedded in a corresponding second mounting slot.

7. The energy storage device according to any one of claims 1 to 6, characterized in that, The surface of the battery module is provided with an insulating thermal pad; The hot end abuts against the insulating thermally conductive pad.

8. The energy storage device according to any one of claims 1 to 6, characterized in that, The inverter assembly includes: An auxiliary power supply is electrically connected to the thermoelectric cooler and is used to provide electrical energy to the thermoelectric cooler.

9. The energy storage device according to claim 8, characterized in that, The power supply path between the auxiliary power supply and the semiconductor cooling chip is equipped with a control switch; The inverter assembly also includes: The control module is electrically connected to the control switch.

10. The energy storage device according to claim 9, characterized in that, The battery box is also equipped with a temperature sensor, which is electrically connected to the control module.

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