Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack and electric equipment.The battery pack comprises a box body, a heat dissipation assembly and a plurality of battery modules, the heat dissipation assembly and the battery modules are arranged in the box body, the heat dissipation assembly comprises a heat dissipation main body and a plurality of heat conduction fins, and the heat conduction fins are arranged at intervals in the length direction of the heat dissipation main body; the heat-conducting fins are positioned between two adjacent battery modules, or the heat-conducting fins are positioned between the battery modules and the side wall of the box body; at least one surface of each heat-conducting fin is provided with a semiconductor chilling plate, and the refrigeration surface of the semiconductor chilling plate faces the side wall of the battery module and / or the box body; and the heating surface of the semiconductor chilling plate faces the heat-conducting fins. According to the battery pack provided by the utility model, the semiconductor chilling plate is arranged on at least one surface of each heat-conducting fin, and the refrigeration surface of the semiconductor chilling plate faces the side wall of the battery module and / or the box body; and the heating surface faces the heat conduction fins, so that rapid cooling can be realized, and the temperature difference between the battery modules in the battery pack is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and electrical equipment. Background Technology

[0002] A battery pack is an integrated unit composed of multiple battery modules, used to store and provide electrical energy. Within a battery pack, due to limitations in the layout and heat dissipation structure design of the battery modules, the heat dissipation conditions vary between modules in different locations. For example, battery modules located in the central area of ​​the battery pack experience difficulty in heat dissipation due to heat accumulation and a longer heat dissipation path, while modules in the edge areas dissipate heat relatively easily, resulting in temperature inconsistencies between battery modules.

[0003] When the battery pack is under high-power discharge conditions, the battery modules located in the central area of ​​the battery pack will generate a large amount of heat in a short period of time. Existing cooling systems may not be able to dissipate this heat in time, causing the battery temperature to rise rapidly, affecting battery performance and lifespan. Utility Model Content

[0004] This utility model provides a battery pack and electrical equipment to solve the above-mentioned technical defects in the prior art, and can achieve rapid cooling and effectively reduce the temperature difference between the battery modules in the battery pack.

[0005] The first aspect of this utility model provides a battery pack, including a housing, a heat dissipation assembly and a plurality of battery modules disposed in the housing, the heat dissipation assembly including a heat dissipation body and a plurality of heat-conducting fins, the plurality of heat-conducting fins being spaced apart along the length direction of the heat dissipation body, the heat-conducting fins being located between two adjacent battery modules, or the heat-conducting fins being located between the battery modules and the side wall of the housing.

[0006] Each of the heat-conducting fins has at least one surface provided with a semiconductor refrigeration chip, the cooling surface of the semiconductor refrigeration chip facing the side wall of the battery module and / or the housing; the heating surface of the semiconductor refrigeration chip facing the heat-conducting fin.

[0007] According to the battery pack provided by this utility model, each of the heat-conducting fins is provided with a first side and a second side facing away from each other along the width direction, and both the first side and the second side are provided with a semiconductor cooling chip.

[0008] In this configuration, the cooling surface of the semiconductor refrigeration chip located between two adjacent battery modules faces the corresponding battery module, and the heating surface faces the heat-conducting fins; the cooling surface of the semiconductor refrigeration chip located between the battery module and the side wall of the housing faces the corresponding side wall of the housing, and the heating surface faces the corresponding heat-conducting fins.

[0009] According to the battery pack provided by this utility model, the semiconductor cooling chip is in contact with the battery module, or a gap is provided between the semiconductor cooling chip and the battery module.

[0010] According to the battery pack provided by this utility model, the semiconductor cooling chip is in contact with the side wall of the housing, or a gap is provided between the semiconductor cooling chip and the side wall of the housing.

[0011] According to the battery pack provided by this utility model, the semiconductor cooling chips are arranged in series in each of the heat-conducting fins.

[0012] The first aspect of this utility model provides a battery pack, including a housing, a heat dissipation assembly and a plurality of battery modules disposed in the housing, the heat dissipation assembly including a heat dissipation body and a plurality of heat-conducting fins, the plurality of heat-conducting fins being spaced apart along the length direction of the heat dissipation body, the heat-conducting fins being located between two adjacent battery modules, or the heat-conducting fins being located between the battery modules and the side wall of the housing.

[0013] A semiconductor refrigeration chip is provided between the heat dissipation body and the heat-conducting fins. The heating surface of the semiconductor refrigeration chip is in contact with the heat dissipation body, and the heat-conducting fins are vertically connected to the cooling surface of the semiconductor refrigeration chip.

[0014] According to the battery pack provided by this utility model, at least one of the surface of the battery module, the heat-conducting fins, and the side wall of the housing is provided with a temperature sensor, the temperature sensor is electrically connected to a controller, and the controller is electrically connected to the semiconductor cooling chip;

[0015] The temperature sensor transmits the collected temperature data to the controller, which then controls the cooling power of the thermoelectric cooler based on the temperature data.

[0016] According to the battery pack provided by this utility model, the box body includes multiple side plates and a cover, the heat dissipation body acts as the bottom plate of the box body, the multiple side plates and the heat dissipation body surround a box body with an opening, and the cover is placed on the box body to seal the opening.

[0017] According to the battery pack provided by this utility model, the heat dissipation body includes any one of a water-cooled plate, a radiator, and a heat spreader.

[0018] A second aspect of this utility model provides an electrical device, including an electrical main body and a battery pack as described in any one of the present inventions, wherein the battery pack is used to supply power to the electrical main body.

[0019] The battery pack provided by this utility model has heat-conducting fins disposed between two adjacent battery modules, or between a battery module and the side wall of the housing. A thermoelectric cooler is provided on at least one surface of each heat-conducting fin, with the cooling surface of the cooler facing the battery module and / or the side wall of the housing, and the heating surface facing the heat-conducting fins. When the thermoelectric cooler is powered on, the cooling surface absorbs the heat dissipated by the battery module, lowering its temperature. The heat generated by the heating surface of the cooler is transferred to the heat-conducting fins, which then rapidly conduct the heat to the heat dissipation body. The heat dissipation body dissipates the heat to the outside of the housing through convection heat exchange with the surrounding air, thereby achieving heat dissipation and cooling of the battery module. This enables rapid cooling and effectively reduces the temperature difference between the battery modules within the battery pack.

[0020] The electrical equipment provided by this utility model has all the above advantages because it includes the aforementioned battery pack. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention (the casing is omitted).

[0023] Figure 2 This is a schematic diagram of the structure of one embodiment of the battery pack provided by this utility model.

[0024] Figure 3 This is a schematic diagram of another embodiment of the battery pack provided by this utility model.

[0025] Figure label:

[0026] 10. Battery module;

[0027] 20. Heat dissipation component; 21. Heat dissipation body; 22. Heat-conducting fins;

[0028] 30. Semiconductor cooling chip; 31. Cooling surface; 32. Heating surface. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention (the casing is omitted). Figure 2 This is a schematic diagram of the structure of one embodiment of the battery pack provided by this utility model.

[0031] See Figure 1 and Figure 2 This utility model provides a battery pack, which includes a housing (not shown in the figure), a heat dissipation component 20 and a plurality of battery modules 10 disposed in the housing. The heat dissipation component 20 includes a heat dissipation body 21 and a plurality of heat-conducting fins 22. The plurality of heat-conducting fins 22 are spaced apart along the length direction of the heat dissipation body 21. The heat-conducting fins 22 are located between two adjacent battery modules 10, or the heat-conducting fins 22 are located between the battery module 10 and the side wall of the housing.

[0032] At least one surface of each heat-conducting fin 22 is provided with a semiconductor cooling chip 30, the cooling surface 31 of the semiconductor cooling chip 30 facing the side wall of the battery module 10 and / or the housing; the heating surface 32 of the semiconductor cooling chip 30 facing the heat-conducting fin 22.

[0033] The battery pack casing can be made of high-strength aluminum alloy in a rectangular structure, providing excellent mechanical strength and heat dissipation. The casing contains space to accommodate multiple battery modules 10, which are neatly arranged within the casing. Each battery module 10 consists of multiple individual battery cells connected in series or parallel, providing a stable power output.

[0034] The heat dissipation body 21 can be an aluminum metal plate. The length and height of the metal plate are adapted to the side wall of the casing, covering the area between the battery module 10 and the side wall of the casing. The heat dissipation body 21 can be a water-cooled plate, i.e., a heat exchange channel is constructed inside the water-cooled plate. The length of the heat dissipation body 21 is consistent with the arrangement direction of the battery module 10, ensuring effective heat conduction along the length of the battery pack. Along the length of the heat dissipation body 21, several heat-conducting fins 22 are evenly spaced. The heat-conducting fins 22 are also made of copper and are rectangular thin sheets. The width and height of the heat-conducting fins 22 can be designed according to the size and spacing of the battery module 10 to ensure that they can be tightly embedded between two adjacent battery modules 10. Each heat-conducting fin 22 is firmly connected to the heat dissipation body 21 by welding, ensuring that heat can be transferred from the heat-conducting fin 22 to the heat dissipation body 21.

[0035] A thermoelectric cooler 30 can be provided on both surfaces of each heat-conducting fin 22. The cooling surface 31 of the thermoelectric cooler 30 faces the battery module 10, while the heating surface 32 is tightly attached to the heat-conducting fin 22. The size of the thermoelectric cooler 30 can match the surface size of the heat-conducting fin 22, and it is fixed by adhesive using a thermally conductive silicone pad to ensure good thermal conductivity.

[0036] During battery pack operation, battery module 10 generates heat. Since the cooling surface 31 of the thermoelectric cooler 30 faces the battery module 10, when the thermoelectric cooler 30 is powered on, the cooling surface 31 absorbs the heat dissipated by the battery module 10, lowering its temperature. The heat generated by the heating surface 32 of the thermoelectric cooler 30 is transferred to the heat-conducting fins 22, which then rapidly conduct the heat to the heat dissipation body 21. The heat dissipation body 21 dissipates the heat outside the housing through convection heat exchange with the surrounding air, thereby achieving heat dissipation and cooling of the battery module 10.

[0037] In some embodiments of this utility model, the battery pack casing can also adopt a structure combining engineering plastics and a metal frame, which ensures the strength of the casing while reducing its weight. Multiple battery modules 10 are installed inside the casing.

[0038] The heat dissipation body 21 can be a group of parallel aluminum alloy pipes. These pipes are arranged along the orientation of the battery module 10, effectively collecting and conducting heat. Several aluminum heat-conducting fins 22 are spaced apart along the length of the metal pipes. The heat-conducting fins 22 are corrugated thin sheets. The corrugated design increases the surface area of ​​the heat-conducting fins 22, improving heat dissipation efficiency. The heat-conducting fins 22 and the metal pipes are integrally formed through an extrusion process, ensuring good thermal conductivity.

[0039] Each heat-conducting fin 22 has a thermoelectric cooler 30 on its surface, with the cooling surface 31 facing the battery module 10 and the heating surface 32 in close contact with the heat-conducting fin 22. The thermoelectric cooler 30 is fixed by applying thermal grease to ensure the stability of heat transfer.

[0040] The heat dissipation body 21 can also be a heat sink or a vapor chamber. A vapor chamber typically consists of two thin metal plates, which are fabricated using microchannel technology to form a closed cavity inside. The cavity is evacuated to a vacuum state, and then a suitable amount of working medium is injected. Common working media include water, acetone, and methanol, with water being the most commonly used due to its high latent heat of vaporization and chemical stability. In addition, a capillary structure, such as a sintered copper powder layer, fiber fabric, or groove structure, is attached to the inner wall of the cavity. The function of the capillary structure is to facilitate the circulation of the working medium within the vapor chamber. The vapor chamber helps maintain a uniform temperature for the battery module, improving battery charging and discharging efficiency and safety, and extending battery life.

[0041] It is understood that the battery pack provided in this embodiment of the present invention has heat-conducting fins 22 disposed between two adjacent battery modules 10, or between the battery module 10 and the side wall of the housing. At least one surface of each heat-conducting fin 22 is provided with a thermoelectric cooler 30, with the cooling surface 31 of the thermoelectric cooler 30 facing the battery module 10 and / or the side wall of the housing; and the heating surface 32 of the thermoelectric cooler 30 facing the heat-conducting fins 22. When the thermoelectric cooler 30 is powered on, the cooling surface 31 absorbs the heat emitted by the battery module 10, lowering the temperature of the battery module 10. The heat generated by the heating surface 32 of the thermoelectric cooler 30 is transferred to the heat-conducting fins 22, which then rapidly conduct the heat to the heat dissipation body 21. The heat dissipation body 21 dissipates the heat outside the housing through convection heat exchange with the surrounding air, thereby achieving heat dissipation and cooling of the battery module 10 and effectively reducing the temperature difference between the battery modules 10 within the battery pack.

[0042] Continue reading Figure 1 and Figure 2 In some embodiments of this utility model, each heat-conducting fin 22 is provided with a first side and a second side facing away from each other along the width direction, and both the first side and the second side are provided with a semiconductor cooling chip 30.

[0043] In this configuration, the cooling surface 31 of the semiconductor cooling chip 30 located between two adjacent battery modules 10 faces the corresponding battery module 10, and the heating surface 32 faces the heat-conducting fins 22; the cooling surface 31 of the semiconductor cooling chip 30 located between the battery module 10 and the side wall of the housing faces the corresponding side wall of the housing, and the heating surface 32 faces the corresponding heat-conducting fins 22.

[0044] This is equivalent to having a semiconductor cooling chip 30 on each of the two surfaces opposite to each heat-conducting fin 22. In other words, each battery module 10 has a semiconductor cooling chip 30 on both sides for cooling, resulting in a better cooling effect.

[0045] The heat-conducting fins 22 have a first side and a second side facing each other along their width. Both sides are finely polished to ensure good adhesion to the thermoelectric cooler 30. The thermoelectric cooler 30 is selected with appropriate cooling power and size, and its size is adapted to the side dimensions of the heat-conducting fins 22. During installation, a very thin layer of thermally conductive silicone grease is applied between the thermoelectric cooler 30 and the side of the heat-conducting fins 22 to reduce thermal resistance. Then, screws or clips are used to firmly fix the thermoelectric cooler 30 to the side of the heat-conducting fins 22.

[0046] For the heat-conducting fins 22 located between two adjacent battery modules 10, the cooling surfaces 31 of the semiconductor cooling chips 30 on the first and second sides face the corresponding battery modules 10, while the heating surfaces 32 are tightly attached to the sides of the heat-conducting fins 22. Similarly, for the heat-conducting fins 22 located between the battery modules 10 and the sidewall of the housing, the cooling surfaces 31 of the semiconductor cooling chips 30 face the corresponding sidewall of the housing, while the heating surfaces 32 also face the heat-conducting fins 22.

[0047] During the charging and discharging process of the battery pack, the battery module 10 generates heat. When the thermoelectric cooler 30 located between two adjacent battery modules 10 is energized, the cooling surface 31 begins to absorb the heat dissipated by the battery module 10, thereby reducing the temperature of the battery module 10 and maintaining it within a suitable operating range. At the same time, the heat generated by the heating surface 32 of the thermoelectric cooler 30 is transferred to the heat-conducting fins 22. The heat-conducting fins 22 quickly disperse the heat through their own thermal conductivity, and then dissipate the heat into the air inside the housing or conduct it to the heat dissipation body 21 through convection heat exchange with the surrounding air.

[0048] For the semiconductor cooling chip 30 located between the battery module 10 and the side wall of the housing, its cooling surface 31 absorbs the heat conducted from the side wall of the housing (the side wall of the housing may be affected by the ambient temperature and rise), preventing heat from being transferred back to the battery module 10. The heat generated by the heating surface 32 is also transferred to the heat-conducting fins 22 for heat dissipation, thereby ensuring the stability of the ambient temperature around the battery module 10.

[0049] In some embodiments of this utility model, multiple temperature sensors can be installed on the surface of the battery module 10, the heat-conducting fins 22, and key locations inside the housing to monitor the temperature of the battery module 10, the temperature of the heat-conducting fins 22, and the ambient temperature inside the housing in real time.

[0050] The temperature sensor transmits the collected temperature data to the controller, which automatically adjusts the operating state of the thermoelectric cooler 30 based on a preset temperature threshold and control algorithm. For example, when the temperature of the battery module 10 rises above the set value, the controller increases the cooling power of the thermoelectric cooler 30; when the temperature drops to a suitable range, the controller reduces the cooling power to save energy and extend the service life of the thermoelectric cooler 30.

[0051] During battery pack operation, temperature sensors continuously monitor the temperature of various components and feed the data back to the controller. The controller determines the temperature status of the battery pack based on the received data and then sends a control signal to the thermoelectric cooler 30, thereby making the cooling temperature of the battery pack controllable.

[0052] Essentially, the semiconductor cooling chip 30 located between adjacent battery modules 10 and between the battery module 10 and the side wall of the housing can adjust its cooling power according to the controller's instructions. Its cooling surface 31 effectively absorbs heat from the battery module 10 and the side wall of the housing, while its heating surface 32 transfers heat to the heat-conducting fins 22. The heat-conducting fins 22 dissipate heat rapidly through a microchannel structure and convection heat exchange with the surrounding air, thereby achieving precise control of the internal temperature of the battery pack and ensuring that the battery module 10 always operates within its optimal operating temperature range.

[0053] Continue reading Figure 2 In some embodiments of this utility model, the semiconductor cooling chip 30 is in contact with the battery module 10, or a gap is provided between the semiconductor cooling chip 30 and the battery module 10.

[0054] The semiconductor cooling chip 30 is in contact with the side wall of the housing, or a gap is provided between the semiconductor cooling chip 30 and the side wall of the housing.

[0055] The first method: The semiconductor cooling chip 30 contacts the battery module 10 and the side wall of the housing.

[0056] The cooling surface 31 of the thermoelectric cooler 30 is in direct, close contact with the surface of the battery module 10, while the heating surface 32 is in close contact with the side of the heat-conducting fins 22. Similarly, the thermoelectric cooler 30 located between the battery module 10 and the side wall of the housing has its cooling surface 31 in close contact with the side wall of the housing, and its heating surface 32 in contact with the heat-conducting fins 22. To ensure good heat conduction, a thin layer of thermal grease is applied between the contact surfaces to reduce thermal resistance.

[0057] During battery pack operation, battery module 10 generates heat. Since the cooling surface 31 of the thermoelectric cooler 30 is in direct contact with battery module 10, when the thermoelectric cooler 30 is powered on, the cooling surface 31 can quickly absorb the heat dissipated by battery module 10, lowering the temperature of battery module 10 and maintaining it within a suitable operating range. Simultaneously, the heat generated by the heating surface 32 of the thermoelectric cooler 30 is transferred to the heat-conducting fins 22. The heat-conducting fins 22 quickly disperse the heat through their own thermal conductivity, and then dissipate the heat into the air inside the housing through convection heat exchange with the surrounding air.

[0058] For the semiconductor cooling chip 30 in contact with the side wall of the enclosure, its cooling surface 31 absorbs the heat conducted from the side wall of the enclosure (the side wall of the enclosure may be affected by the ambient temperature and rise), preventing heat from being transferred back to the battery module 10. The heat generated by the heating surface 32 is also transferred to the heat-conducting fins 22 for heat dissipation, thereby ensuring the stability of the ambient temperature around the battery module 10.

[0059] The second method: There is a gap between the semiconductor cooling chip 30 and the battery module 10, and a gap between the chip and the side wall of the housing.

[0060] A certain gap is provided between the thermoelectric cooler 30 and the battery module 10, and between the thermoelectric cooler 30 and the side wall of the housing. The gap is filled with a phase change material with good thermal conductivity, such as a paraffin-based phase change material. This phase change material is solid at room temperature, and when the temperature rises to a certain level, it will undergo a phase change to absorb a large amount of heat, thereby playing a role in buffering and storing heat.

[0061] When the battery pack is operating, the heat generated by the battery module 10 is first transferred to the phase change material in the gaps. When the temperature rises to the phase change temperature of the phase change material, the phase change material begins to absorb heat and undergo a phase change, thereby slowing down the rate of temperature rise of the battery module 10. At the same time, the semiconductor cooling chip 30 is powered on, and the cooling surface 31 indirectly absorbs the heat from the battery module 10 through the phase change material in the gaps, further controlling the temperature of the battery module 10.

[0062] The heat generated by the heating surface 32 of the thermoelectric cooler 30 is transferred to the heat-conducting fins 22, which then dissipate the heat into the surrounding air. The working principle is similar for thermoelectric coolers 30 with gaps between them and the sidewalls of the housing. The phase change material in the gaps absorbs heat from the sidewalls, preventing external heat from entering the battery module 10. Simultaneously, the heat from the heating surface 32 is dissipated through the heat-conducting fins 22, achieving effective heat dissipation and temperature protection for the battery module 10.

[0063] The third method: The semiconductor cooling chip 30 contacts the battery module 10, and there is a gap between it and the side wall of the housing.

[0064] The cooling surface 31 of the thermoelectric cooler 30 is in direct, tight contact with the surface of the battery module 10. Thermal grease is applied between the contact surfaces to improve heat transfer efficiency. A gap is provided between the thermoelectric cooler 30 and the side wall of the housing, and a thermally conductive silicone pad is filled in the gap. The thermally conductive silicone pad has good elasticity and thermal conductivity, which can effectively conduct heat from the side wall of the housing to the cooling surface 31 of the thermoelectric cooler 30 while ensuring a certain gap.

[0065] During battery pack operation, the heat generated by the battery module 10 is directly absorbed by the cooling surface 31 of the thermoelectric cooler 30, causing the temperature of the battery module 10 to decrease. The heat generated by the heating surface 32 of the thermoelectric cooler 30 is transferred to the heat-conducting fins 22, which dissipate the heat through convection heat exchange with the surrounding air.

[0066] For the thermoelectric cooler 30, which has a gap between itself and the side wall of the housing, the heat from the side wall of the housing is conducted to the cooling surface 31 of the thermoelectric cooler 30 through the thermally conductive silicone pad, and is absorbed by the cooling surface 31, thereby preventing the heat from the side wall of the housing from affecting the temperature of the battery module 10. At the same time, the heating surface 32 of the thermoelectric cooler 30 transfers the absorbed heat to the thermally conductive fins 22 for heat dissipation, maintaining the stability of the ambient temperature around the battery module 10.

[0067] The fourth method: A gap is provided between the semiconductor cooling chip 30 and the battery module 10, and it contacts the side wall of the housing.

[0068] A gap is provided between the thermoelectric cooler 30 and the battery module 10, and the gap is filled with a graphite thermal conductive sheet. The graphite thermal conductive sheet has good planar thermal conductivity, which can quickly conduct the heat generated by the battery module 10 to the cooling surface 31 of the thermoelectric cooler 30. The heating surface 32 of the thermoelectric cooler 30 is in close contact with the side of the thermal conductive fins 22. At the same time, the thermoelectric cooler 30 is in direct contact with the side wall of the housing, and thermal grease is applied between the contact surfaces.

[0069] When the battery pack is operating, the heat generated by the battery module 10 is transferred to the cooling surface 31 of the thermoelectric cooler 30 through the graphite heat-conducting sheet. The cooling surface 31 absorbs the heat, thereby controlling the temperature of the battery module 10. The heat generated by the heating surface 32 of the thermoelectric cooler 30 is transferred to the heat-conducting fins 22, which then dissipate the heat into the surrounding air.

[0070] Since the semiconductor cooling chip 30 is in direct contact with the side wall of the housing, its cooling surface 31 can absorb the heat conducted from the side wall of the housing, preventing external heat from entering the battery module 10. At the same time, the heat from the heating surface 32 is dissipated through the heat-conducting fins 22, thereby achieving effective heat dissipation and temperature protection for the battery module 10.

[0071] It should be noted that the semiconductor cooling chips located on each heat-conducting fin are arranged in series.

[0072] Figure 3 This is a schematic diagram of another embodiment of the battery pack provided by this utility model.

[0073] See Figure 3 The present invention also provides a battery pack, which includes a housing, a heat dissipation assembly 20 disposed in the housing, and a plurality of battery modules 10. The heat dissipation assembly 20 includes a heat dissipation body 21 and a plurality of heat-conducting fins 22. The plurality of heat-conducting fins 22 are spaced apart along the length direction of the heat dissipation body 21. The heat-conducting fins 22 are located between two adjacent battery modules 10, or between the battery modules 10 and the side wall of the housing. A semiconductor cooling chip 30 is provided between the heat dissipation body 21 and the heat-conducting fins 22. The heating surface 32 of the semiconductor cooling chip 30 is in contact with the heat dissipation body 21, and the heat-conducting fins 22 are vertically connected to the cooling surface 31 of the semiconductor cooling chip 30.

[0074] The battery pack of this invention can be applied to electric vehicles. The battery pack housing can be made of aluminum alloy frame. The housing has a rectangular shape and a compact and reasonable internal space layout to make full use of the limited space to accommodate the battery module 10 and heat dissipation component 20.

[0075] Multiple battery modules 10 are arranged in a combination of series and parallel connections to provide stable power output for the vehicle.

[0076] The heat dissipation body 21 can be a hollow aluminum alloy tube running through the length of the housing. Aluminum alloy has excellent thermal conductivity and low cost. The hollow design not only reduces the weight of the heat dissipation body 21, but also provides a channel for coolant flow, further enhancing the heat dissipation effect. The two ends of the heat dissipation body 21 are connected to the vehicle's cooling system, through which coolant circulates and carries away heat.

[0077] The heat-conducting fins 22 are made of metal to ensure good thermal conductivity. The heat-conducting fins 22 are vertically connected to the cooling surface 31 of the semiconductor cooling chip 30. Several heat-conducting fins 22 are evenly spaced along the length of the heat dissipation body 21. Some heat-conducting fins 22 are located between two adjacent battery modules 10 to directly absorb the heat generated by the battery module 10; while others are located between the battery module 10 and the side wall of the casing to prevent heat from the outside of the casing from entering the battery module 10 and to assist in the heat dissipation of the battery module 10.

[0078] The thermoelectric cooler 30 can be made of high-performance bismuth telluride-based semiconductor material, exhibiting high cooling efficiency and reliability. Its heating surface 32 is in close contact with the heat sink 21, with a layer of highly thermally conductive silicone grease filling the tiny gap between them to ensure efficient heat transfer. The cooling surface 31 is vertically connected to the heat-conducting fins 22 using a welding process to ensure good thermal conductivity. The dimensions of the thermoelectric cooler 30 are customized according to the dimensions of the heat-conducting fins 22 and the heat sink 21, enabling precise control of the temperature surrounding the battery module 10.

[0079] During the operation of the electric vehicle, the battery module 10 continuously outputs electrical energy, which generates heat accordingly. The heat-conducting fins 22 located between adjacent battery modules 10 first absorb the heat emitted by the battery module 10, and then transfer the heat to the cooling surface 31 of the connected thermoelectric cooler 30. After the thermoelectric cooler 30 is powered on, the temperature of its cooling surface 31 decreases, absorbing heat, while the temperature of its heating surface 32 increases, transferring heat to the heat dissipation body 21.

[0080] The heat-conducting fins 22, located between the battery module 10 and the side wall of the casing, absorb heat transferred from the battery module 10 to the side wall of the casing, and prevent heat from outside the casing from entering the battery module 10. The heat-conducting fins 22 also transfer heat to the thermoelectric cooler 30, and then the thermoelectric cooler 30 transfers the heat to the heat dissipation body 21.

[0081] The coolant in the heat dissipation body 21 circulates continuously, carrying away the heat from the heating surface 32 of the semiconductor cooling chip 30 and dissipating it into the vehicle's cooling system, and finally into the atmosphere, thereby ensuring that the battery module 10 is always within a suitable operating temperature range, improving battery performance and lifespan.

[0082] It should be noted that the battery pack provided in this embodiment of the present invention includes a box body comprising multiple side plates and a cover, a heat dissipation body 21 serving as the bottom plate of the box body, multiple side plates and heat dissipation body 21 forming a box body with an opening, and a cover covering the box body to seal the opening.

[0083] This utility model provides an electrical device, including an electrical main body and a battery pack of any one of them. The battery pack is used to supply power to the electrical main body, which can be an electric vehicle, such as an electric work machine or an electric car.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery pack, characterized in that, The device includes a housing, a heat dissipation assembly and multiple battery modules disposed within the housing. The heat dissipation assembly includes a heat dissipation body and several heat-conducting fins. The several heat-conducting fins are spaced apart along the length of the heat dissipation body. The heat-conducting fins are located between two adjacent battery modules, or between a battery module and the side wall of the housing. Each of the heat-conducting fins has at least one surface provided with a semiconductor refrigeration chip, the cooling surface of the semiconductor refrigeration chip facing the side wall of the battery module and / or the housing; the heating surface of the semiconductor refrigeration chip facing the heat-conducting fin.

2. The battery pack according to claim 1, characterized in that, Each of the heat-conducting fins has a first side and a second side facing away from each other along the width direction, and both the first side and the second side are provided with a semiconductor cooling chip. In this configuration, the cooling surface of the semiconductor refrigeration chip located between two adjacent battery modules faces the corresponding battery module, and the heating surface faces the heat-conducting fins; the cooling surface of the semiconductor refrigeration chip located between the battery module and the side wall of the housing faces the corresponding side wall of the housing, and the heating surface faces the corresponding heat-conducting fins.

3. The battery pack according to claim 2, characterized in that, The semiconductor cooling chip is in contact with the battery module, or a gap is provided between the semiconductor cooling chip and the battery module.

4. The battery pack according to claim 2, characterized in that, The semiconductor cooling chip is in contact with the side wall of the housing, or a gap is provided between the semiconductor cooling chip and the side wall of the housing.

5. The battery pack according to claim 1, characterized in that, The semiconductor cooling chips are arranged in series for each of the heat-conducting fins.

6. A battery pack, characterized in that, The device includes a housing, a heat dissipation assembly and multiple battery modules disposed within the housing. The heat dissipation assembly includes a heat dissipation body and several heat-conducting fins. The several heat-conducting fins are spaced apart along the length of the heat dissipation body. The heat-conducting fins are located between two adjacent battery modules, or between a battery module and the side wall of the housing. A semiconductor refrigeration chip is provided between the heat dissipation body and the heat-conducting fins. The heating surface of the semiconductor refrigeration chip is in contact with the heat dissipation body, and the heat-conducting fins are vertically connected to the cooling surface of the semiconductor refrigeration chip.

7. The battery pack according to any one of claims 1 to 6, characterized in that, Temperature sensors are provided on at least one of the surface of the battery module, the heat-conducting fins, and the side wall of the housing. The temperature sensors are electrically connected to the controller, and the controller is electrically connected to the thermoelectric cooler. The temperature sensor transmits the collected temperature data to the controller, which then controls the cooling power of the thermoelectric cooler based on the temperature data.

8. The battery pack according to any one of claims 1 to 6, characterized in that, The enclosure includes multiple side panels and a cover. The heat dissipation body acts as the bottom plate of the enclosure. The multiple side panels and the heat dissipation body surround a box with an opening. The cover is placed on the box to seal the opening.

9. The battery pack according to any one of claims 1 to 6, characterized in that, The heat dissipation body includes any one of a water-cooled plate, a radiator, and a heat spreader.

10. An electrical appliance, characterized in that, It includes a power-consuming body and a battery pack as described in any one of claims 1 to 9, the battery pack being used to supply power to the power-consuming body.

Images