A battery module, a battery device, and an electric device

Abstract

The utility model belongs to battery heat dissipation technical field, specifically disclose a kind of battery module, battery device and electric device, battery module includes a plurality of sequentially stacked electric core, heat conduction plate and temperature control mechanism, heat conduction plate is arranged between two adjacent electric core, heat conduction plate can heat exchange with electric core.Temperature control mechanism is arranged in at least one side of multiple electric core, temperature control mechanism includes temperature equalizing piece and temperature control, temperature equalizing piece can carry out heat exchange with heat conduction plate, temperature control carries out thermal management to temperature equalizing piece.By heat conduction plate the heat of electric core located in the middle position close to stacking direction is quickly conducted to temperature equalizing piece, temperature equalizing piece makes the temperature of each electric core tend to be consistent, temperature difference between multiple electric core is smaller, temperature control carries out thermal management to temperature equalizing piece, and then realize the regulation and control to electric core temperature, multiple electric core all are in suitable working temperature, and service life is extended.The utility model further provides a kind of battery device and electric device, including above-mentioned battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery heat dissipation technology, and in particular to a battery module, battery device and power supply device. Background Technology

[0002] With the continuous development of technology, drones can perform tasks required in various industries, such as aerial delivery. In practical applications, drones are equipped with battery modules (including main batteries and backup batteries) to provide power and signal transmission. Under harsh external environmental conditions (excessively high or low ambient temperatures), and due to the heat generated by the battery modules during takeoff and landing, the battery modules in drones cannot maximize their performance, resulting in a shortened lifespan. Therefore, how to manage the thermal of the battery modules in drones is an urgent problem to be solved.

[0003] Currently, common airborne batteries consist of multiple cells stacked together. Several methods exist for thermal management of these batteries, such as natural cooling or liquid cooling. However, in these methods, heat from the inner cells cannot be dissipated quickly enough, leading to a continuous rise in temperature and poor heat dissipation. Furthermore, cells closer to the center of the battery accumulate more heat, resulting in temperature differences between cells, poor temperature uniformity, decreased battery performance, and a shorter lifespan. Additionally, liquid cooling systems, including the cooling plate and its encapsulated heat exchange medium, are quite heavy. Integrating a liquid cooling plate into a drone significantly increases its weight, energy consumption, and flight costs. Moreover, the risk of leakage from the liquid cooling plate reduces safety. Utility Model Content

[0004] The purpose of this utility model is to provide a battery module, battery device and power device. The battery module has good temperature uniformity among the cells and excellent thermal management performance. All cells in the battery module are at a suitable operating temperature, resulting in a long service life. In addition, the battery module is lightweight and has high safety.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, this utility model provides a battery module, which includes:

[0007] Multiple battery cells, wherein the multiple battery cells are stacked sequentially along the thickness direction of the battery cells;

[0008] A heat-conducting plate is disposed between two adjacent battery cells, and the heat-conducting plate is capable of exchanging heat with the adjacent battery cells;

[0009] A temperature control mechanism is disposed on at least one side of the plurality of battery cells. The temperature control mechanism includes a temperature equalization element and a temperature control element. The temperature equalization element and the temperature control element are arranged sequentially in a direction away from the battery cells. The temperature equalization element can exchange heat with the heat-conducting plate to evenly distribute the heat of the plurality of battery cells to the temperature control element. The temperature control element is used to heat or cool the temperature equalization element.

[0010] Optionally, multiple heat-conducting plates are provided, with one heat-conducting plate between each pair of adjacent battery cells.

[0011] Optionally, the heat-conducting plate includes a first body portion and a first folded edge. The first body portion is attached to the end face of the battery cell in the thickness direction. The first folded edge is connected to the side of the first body portion and is perpendicular to the first body portion. The first body portion and the first folded edge form a first accommodating space for mounting the battery cell.

[0012] Optionally, the temperature control mechanism includes an insulating component disposed between the plurality of battery cells and the temperature equalization component, the insulating component serving to insulate and isolate the battery cells and the temperature equalization component.

[0013] Optionally, the insulating element is an insulating film; and / or, the temperature equalization element is a temperature equalization plate.

[0014] Optionally, the temperature control device is a TEC thermoelectric cooler; the battery module includes a temperature sensor, which is disposed at the battery cell and used to obtain the real-time temperature of the battery cell, and both the temperature sensor and the TEC thermoelectric cooler are communicatively connected to the control system.

[0015] Optionally, the temperature control mechanism includes a heat sink, which is disposed on one side of the temperature control unit and is used to dissipate heat from the temperature control unit.

[0016] Optionally, the radiator includes a heat sink and a plurality of heat sink fins, wherein the plurality of heat sink fins are spaced apart on the heat sink.

[0017] Optionally, the battery module further includes an electric heating film sandwiched between two adjacent battery cells, the electric heating film being used to heat the battery cells.

[0018] Secondly, this utility model provides a battery device, including a battery box and a plurality of battery modules according to any of the above-mentioned solutions, wherein the plurality of battery modules are integrated and installed in the battery box, and the plurality of battery modules are connected in series and / or in parallel.

[0019] Thirdly, this utility model provides an electrical device, including the battery module in any of the above-mentioned solutions.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention provides a battery module comprising multiple battery cells, a heat-conducting plate, and a temperature control mechanism. The battery cells are stacked sequentially along their thickness direction. The heat-conducting plate, made of a thermally conductive material, is positioned between adjacent cells and exchanges heat with them to quickly and efficiently dissipate heat from the cells located inside the battery module. The temperature control mechanism is located on at least one side of the battery cells and includes a temperature equalization element and a temperature control element. The temperature equalization element exchanges heat with the heat-conducting plate, and the temperature control element heats or cools the temperature equalization element. Thus, by adding a heat-conducting plate between adjacent cells, heat from cells located near the center of the stacking direction is rapidly conducted to the temperature equalization element. The temperature equalization element ensures that the temperatures of the cells are nearly uniform, resulting in a small temperature difference between the cells and good temperature uniformity. Simultaneously, the temperature control element manages the temperature of the temperature equalization element, thereby regulating the temperature of the cells. All cells operate at a suitable temperature, extending their service life. Furthermore, the temperature control device uses the thermoelectric effect to heat or cool the temperature equalizer, providing precise temperature control. It is also lightweight, eliminates the risk of leakage, and ensures high safety.

[0022] This utility model provides a battery device, including a battery box and multiple battery modules. The battery modules are integrated and installed inside the battery box, and are connected in series and / or in parallel. By using the above-mentioned battery modules, it is possible to ensure that all cells are at a suitable operating temperature, and that the temperature uniformity among the multiple cells is good. The battery device has excellent performance and a long service life.

[0023] This utility model also provides an electrical device, which includes the above-mentioned battery module. The battery module is electrically connected to the electrical device. By using the above-mentioned battery module, the temperature difference between each cell can be small, and multiple cells can be at a suitable operating temperature. The cells have excellent performance and can provide a stable current to the electrical device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the battery module provided in Embodiment 1 of this utility model;

[0025] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 3 This is an exploded view of the battery module provided in Embodiment 1 of this utility model;

[0027] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0028] Figure 5 yes Figure 3 A magnified view of a section at point C;

[0029] Figure 6 yes Figure 3 A magnified view of a section at point D;

[0030] Figure 7 This is a top view of the battery module provided in Embodiment 1 of this utility model;

[0031] Figure 8 This is a schematic diagram of the battery module provided in Embodiment 2 of this utility model;

[0032] Figure 9 This is an exploded view of the battery module provided in Embodiment 2 of this utility model;

[0033] Figure 10 yes Figure 9 A magnified view of a section at point E in the middle;

[0034] Figure 11 This is a top view of the battery module provided in Embodiment 2 of this utility model.

[0035] In the picture:

[0036] 100. Battery cell; 110. Electrode; 120. Busbar; 200. Heat-conducting plate; 201. First accommodating space; 210. First body part; 220. First folded edge; 300. Temperature control mechanism; 310. Insulating film; 320. Heat spreader; 330. TEC thermoelectric cooler; 340. Radiator; 341. Heat dissipation plate; 342. Heat dissipation fins; 400. Protective plate; 401. Second accommodating space; 410. Second body part; 420. Second folded edge; 500. Temperature sensor; 600. Electric heating film; 610. Connector; 620. Wire; 700. Buffer pad. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] Example 1

[0042] like Figure 1 , Figure 3 and Figure 7As shown, this embodiment provides a battery module that can be used to power the flight of a drone. The battery module includes multiple battery cells 100, a heat-conducting plate 200, and a temperature control mechanism 300. The multiple battery cells 100 are stacked sequentially along their thickness direction. The heat-conducting plate 200 is disposed between two adjacent battery cells 100, and can exchange heat with its adjacent battery cells 100 to promptly and quickly dissipate heat from the battery cell 100 located in the middle of the stacking direction. The temperature control mechanism 300 is disposed on at least one side of the multiple battery cells 100 in the height direction. For example, the temperature control mechanism 300 can be disposed on the top and / or bottom of the multiple battery cells 100. The temperature control mechanism 300 includes a temperature equalization element and a temperature control element, which are arranged sequentially in a direction away from the battery cells 100. The temperature equalization element can exchange heat with the heat-conducting plate 200 to equalize the heat from the multiple battery cells 100 and then transfer it to the temperature control element. The temperature control element is used to heat or cool the temperature equalization element. The thickness direction of the aforementioned battery cell 100 is as follows: Figure 1 As shown in the X-axis direction, the height direction of cell 100 is... Figure 1 The Z-axis direction is shown in the figure.

[0043] In this embodiment, the battery module rapidly transfers heat or cold from the battery cell 100 located in the middle of the stacking direction to the heat spreader via the heat-conducting plate 200. The heat spreader then evenly distributes the heat or cold from the multiple battery cells 100 to the temperature control unit, which in turn manages the heat spreader's thermal performance, ultimately regulating the temperature of the battery cell 100. For example, during drone takeoff or landing, the battery module's output power is high, and the battery cell 100 generates significant heat. In this case, the heat-conducting plate 200 quickly conducts the heat generated by the battery cell 100 to the heat spreader, and the temperature control unit generates cold air to cool the heat spreader. The heat spreader then evenly transfers the cold air back to the heat-conducting plate 200 and the multiple battery cells 100, achieving good heat dissipation for the multiple battery cells 100 and ensuring a relatively uniform temperature, thus extending the lifespan of the battery cells 100. Of course, in cold winter environments, the battery module temperature is too low, the power supply performance is poor, and it cannot provide stable power for the drone. At this time, the temperature control device can heat the temperature distribution component, and then the temperature distribution component conducts heat to the battery cell 100 through the heat conduction plate 200, so that the temperature of the battery cell 100 rises and can achieve normal power supply.

[0044] It should be noted that in order to improve the temperature uniformity among multiple cells 100, the projection of the temperature uniformity element along the height direction of the cell 100 should be able to cover multiple cells 100, thereby reducing the temperature difference among multiple cells 100, improving the temperature uniformity among each cell 100, and achieving good thermal management effect.

[0045] See also Figure 3 and Figure 4In this embodiment, multiple heat-conducting plates 200 are provided, with one heat-conducting plate 200 between each pair of adjacent battery cells 100. This allows the heat from the battery cell 100 located at the center of the battery cell stacking direction to be quickly conducted to the temperature control mechanism 300, ensuring good heat dissipation for all battery cells 100. This helps reduce the temperature difference between multiple battery cells 100 and improves the temperature uniformity among the battery cells 100. For example, the heat-conducting plates 200 can be made of conventional thermally conductive materials such as aluminum, copper, and silver, or they can be made of high thermally conductive materials such as graphene or non-silicon thermally conductive materials.

[0046] Optionally, the heat-conducting plate 200 in this embodiment includes a first body portion 210 and three first folded edges 220. The first body portion 210 is attached to the end face of the battery cell 100 in the thickness direction. The three first folded edges 220 are sequentially connected to three adjacent sides of the first body portion 210. Each first folded edge 220 is perpendicular to the first body portion 210. The first body portion 210 and the three first folded edges 220 form a first accommodating space 201 for mounting the battery cell 100. By setting the three first folded edges 220, the contact area between the heat-conducting plate 200 and the battery cell 100 can be increased, which is beneficial to improving the heat exchange effect. In addition, by setting the first folded edges 220, the battery cell 100 can also be positioned and fixed well, resulting in higher assembly accuracy of the battery module. It should be noted that the heat-conducting plate 200 does not have a first folded edge 220 on the side near the tab 110 of the battery cell 100, to avoid interference between the first folded edge 220 and the tab 110, and to facilitate the arrangement of other structures in the battery module. Of course, in other embodiments, the first folded edge 220 can also be set as one or two, and the arrangement can be adjusted as needed.

[0047] See Figure 2 , Figure 3 and Figure 5The battery module in this embodiment also includes two protective plates 400, which are respectively disposed on the outermost side of the stacking direction (i.e., the thickness direction of the cell 100) of the multiple cells 100. The protective plates 400 can group the multiple cells 100 together and protect the outermost cell 100, preventing it from being damaged by impacts, thus providing good safety performance. Optionally, the protective plate 400 includes a second body portion 410 and three second folded edges 420. The second body portion 410 is attached to the end face of the outermost cell 100 in the thickness direction of the stacking direction. The three second folded edges 420 are sequentially connected to three adjacent sides of the second body portion 410. The second folded edges 420 are all perpendicular to the second body portion 410. The second body portion 410 and the three second folded edges 420 form a second accommodating space 401 for mounting the cell 100. For the outermost cell 100 in the stacking direction, the mounting space of the cell 100 (including the first accommodating space 201 and the second accommodating space 401) is formed by the heat-conducting plate 200 and the protective plate 400. For the cell 100 located on the inner side in the stacking direction, the mounting space of the cell 100 (including a first accommodating space 201) is formed by the first body portion 210 of two adjacent heat-conducting plates 200 and the first folded edge 220 of one of the heat-conducting plates 200.

[0048] Furthermore, the three second folded edges 420 effectively position, fix, and protect the outermost cell 100 in the stacking direction, resulting in higher assembly accuracy and greater stability and reliability of the battery module. It is important to note that the protective plate 400 does not have a second folded edge 420 on the side near the tab 110 of the cell 100 to avoid interference between the second folded edge 420 and the tab 110, and also to facilitate the arrangement of other structures in the battery module. Of course, in other embodiments, one or two second folded edges 420 can be used as needed, with flexible adjustments to their arrangement.

[0049] See also Figure 2 , Figure 3 and Figure 6 The temperature distribution element can be configured as a temperature distribution plate 320. Exemplarily, the temperature distribution plate 320 includes an encapsulation shell and a phase change material disposed inside the encapsulation shell. The encapsulation shell is made of a metal material, such as aluminum, copper, silver, or other conventional thermally conductive materials. The temperature control mechanism 300 in this embodiment also includes an insulating element disposed between the multiple battery cells 100 and the temperature distribution element; that is, the insulating element, the temperature distribution element, and the temperature control element are arranged sequentially in a direction away from the battery cells 100. The insulating element is used to insulate and isolate the battery cells 100 and the temperature distribution element. Optionally, the insulating element can be configured as an insulating film 310, which is attached to the height direction of the battery cells 100 (i.e.,...). Figure 3The insulating film 310 can insulate the battery cell 100 from the temperature equalizer at the top and / or bottom of the Z-axis direction, ensuring electrical safety. Exemplarily, the insulating film 310 can be made of materials such as PP (polypropylene), PC (polycarbonate), PE (polyethylene), PI (polyimide), or PTFE (polytetrafluoroethylene).

[0050] Taking the case where cell 100 needs cooling as an example, the heat generated by cell 100 during operation can be transferred to insulating film 310 through heat-conducting plate 200, and then insulating film 310 transfers the heat to heat spreader 320. After the encapsulation shell of heat spreader 320 absorbs heat, phase change material absorbs heat and diffuses within the encapsulation shell. Heat exchange occurs between the molecules of phase change material, and heat spreader 320 can quickly transfer the absorbed heat to any part of the surface of the encapsulation shell, making the temperature of heat spreader 320 uniform at all positions in the XY plane. This can quickly balance the temperature of multiple cells 100, reduce the temperature difference between cells 100, and achieve good temperature uniformity. At the same time, the phase change material located within the encapsulation shell absorbs heat and undergoes a phase change, which also plays a certain role in cooling heat-conducting plate 200 and cell 100.

[0051] Of course, in some other embodiments, the temperature equalization element can also be made of ceramic plate, mica plate, or polymer composite material plate (silicone-based elastic plate made of glass fiber or polyimide (PI) film as substrate through high-temperature composite process). The materials used to make these plates have excellent thermal conductivity and insulation properties, which can also achieve good temperature equalization effect, while also insulating the battery cell 100 from the temperature control device to ensure electrical safety.

[0052] Furthermore, the temperature control device in this embodiment uses the thermoelectric effect to heat or cool the heat spreader, providing precise temperature control. Moreover, the temperature control device is lightweight, eliminates the risk of leakage, and offers high safety. For example, the temperature control device is a TEC thermoelectric cooler 330. The TEC thermoelectric cooler 330 is attached to the heat spreader 320. The TEC thermoelectric cooler 330 is connected to a power source, which supplies power to the TEC thermoelectric cooler 330, enabling it to cool or heat, thereby cooling or heating the heat spreader 320.

[0053] Optionally, the TEC thermoelectric cooler 330 includes a housing and multiple thermoelectric coolers. The housing is made of a metal material, such as aluminum, copper, silver, or other conventional thermally conductive materials. The multiple thermoelectric coolers are connected in series and spaced apart within the housing. One end of the series connection of the multiple thermoelectric coolers is connected to the positive terminal of the power supply, and the other end is connected to the negative terminal. The housing is in heat exchange contact with the vapor chamber 320. The power supply can be a separately arranged battery dedicated to powering the TEC thermoelectric cooler 330, or it can be the aforementioned battery cell 100. Alternatively, in other cases, it can be an external power socket. The power socket is connected to the battery and battery cell 100 via conductive lines, allowing the battery and battery cell 100 to store electricity, ensuring normal power supply for the UAV after takeoff. By using the TEC thermoelectric cooler 330 to heat or cool the battery cell 100, the risk of leakage associated with traditional liquid cooling methods is avoided, resulting in higher safety, greater portability, and easier integration into the battery cell 100. Moreover, compared to natural heat dissipation or heat dissipation using phase change materials, the TEC thermoelectric cooler 330 can control the temperature more precisely and is not limited by the material properties of the phase change material itself. The TEC thermoelectric cooler 330 can continuously heat or cool the battery cell 100.

[0054] The TEC thermoelectric cooler 330 operates as follows: When multiple thermoelectric coolers are forward-energized, they generate cooling energy, which is transferred to the battery cell 100 via the heat spreader 320 and heat conduction plate 200, thus cooling the battery cell 100. When the multiple thermoelectric coolers are reverse-energized, they generate heat, which is also transferred to the battery cell 100 via the heat spreader 320 and heat conduction plate 200, thus heating the battery cell 100. This allows for precise temperature control of the battery cell 100, ensuring that all cells 100 operate at a suitable temperature with minimal temperature difference between them, resulting in excellent thermal management and a long service life.

[0055] See also Figure 3 and Figure 6The battery module also includes a temperature sensor 500 and a control system. Both the temperature sensor 500 and the TEC thermoelectric cooler 330 are communicatively connected to the control system. Exemplarily, in some embodiments, the temperature sensor 500 can be disposed on the busbar 120 of the battery cell 100. The busbar 120 is connected to the tab 110 of the battery cell 100, enabling series and parallel connections between multiple battery cells 100. The tab 110 and the busbar 120 are located at the top of the battery cell 100 in the height direction, that is, at the end of the heat-conducting plate 200 and the protective plate 400 before the first fold 220 and the second fold 420 are provided. The temperature sensor 500 can be an NTC thermistor (NTC, Negative Temperature Coefficient). Temperature sensor 500 can be used to acquire the real-time temperature at bus 120 of battery cell 100 (close to the real-time temperature of tab 110) and transmit this temperature information to the control system. The control system, based on the temperature information fed back by temperature sensor 500 and after a control strategy assessment, determines whether to activate the TEC thermoelectric cooler 330, the timing of activation, and whether the power supply is forward or reverse for the TEC thermoelectric cooler 330. By adopting this scheme, the temperature control device (i.e., the TEC thermoelectric cooler 330) can promptly activate based on the real-time temperature of battery cell 100 to regulate its temperature, keeping it at a suitable operating temperature. This results in a fast response time and good thermal management performance.

[0056] In practical use, when the real-time temperature of the busbar 120 of the battery cell 100 obtained by the temperature sensor 500 is greater than the first threshold (for example, the first threshold can be 40°C), the control system controls the TEC thermoelectric cooler 330 to be turned on, and the power supply is given to the TEC thermoelectric cooler 330 in the forward direction so that the semiconductor cooling chip of the TEC thermoelectric cooler 330 is cooled. The cooling energy is conducted to the battery cell 100 through the heat spreader 320, the insulating film 310 and the heat conduction plate 200 to cool and lower the temperature of the battery cell 100. When the real-time temperature of the busbar 120 of the battery cell 100 obtained by the temperature sensor 500 is less than the second threshold (for example, the second threshold can be 0°C), the control system controls the TEC thermoelectric cooler 330 to be turned on, and the power supply sends reverse power to the TEC thermoelectric cooler 330 so that the semiconductor cooling chip of the TEC thermoelectric cooler 330 generates heat, and conducts heat to the battery cell 100 through the heat spreader 320, the insulating film 310 and the heat conduction plate 200, thereby heating and raising the temperature of the battery cell 100. When the real-time temperature of the busbar 120 of the battery cell 100, as obtained by the temperature sensor 500, is between the first threshold and the second threshold (including the first threshold and the second threshold), the control system controls the shutdown of the TEC thermoelectric cooler 330 and dissipates heat from the battery cell 100 through the heat spreader 320. At this time, the cooling performance is reduced compared to when the TEC thermoelectric cooler 330 is cooling, but the temperature of the battery cell 100 can still be regulated by natural cooling through heat conduction between the heat conduction plate 200, the insulating film 310 and the heat spreader 320.

[0057] Therefore, in this embodiment, by adding a heat-conducting plate 200 between adjacent cells 100, setting a heat spreader 320 and a TEC thermoelectric cooler 330 at the top and / or bottom of the cells 100, and setting a temperature sensor 500 at the busbar 120 of the cells 100, the heat of the cells 100 located in the middle of the stacking direction can be quickly conducted to the heat spreader 320 through the heat-conducting plate 200. Then, the control system judges the real-time temperature of the cells 100 obtained by the temperature sensor 500 against the set first threshold and second threshold, and then accurately turns on the TEC thermoelectric cooler 330 to regulate the temperature of the cells 100.

[0058] See also Figure 2 and Figure 3 In this embodiment, the temperature control mechanism 300 includes a heat sink 340, which is located on the side of the TEC thermoelectric cooler 330 away from the battery cell 100. The heat sink 340 can assist the TEC thermoelectric cooler 330 in heat dissipation.

[0059] Optionally, the heat sink 340 includes a heat sink 341 and multiple heat sink fins 342. The multiple heat sink fins 342 are spaced apart on the side of the heat sink 341 facing away from the battery cell 100. The heat sink 341 is in contact with the outer casing of the TEC thermoelectric cooler 330. For example, when the temperature sensor 500 detects that the real-time temperature of the busbar 120 has risen to a first threshold, the battery cell 100 needs to be cooled. The control system sends a command to the TEC thermoelectric cooler 330 and the power supply. The power supply supplies power to the TEC thermoelectric cooler 330 in the positive direction. The TEC thermoelectric cooler 330 starts cooling. The cold end of the TEC thermoelectric cooler 330 (i.e., the outer casing of the TEC thermoelectric cooler 330) exchanges heat with the heat spreader 320, transferring the heat from the heat spreader 320 to the heat sink 341 and the heat sink fins 342. Finally, the heat is dissipated into the air through the heat sink fins 342. The heat sink 341 and heat sink fins 342 are designed to accelerate heat dissipation, resulting in good cooling of the battery cell 100. Optionally, the heat sink 341 and the multiple heat sink fins 342 can also be made of a metal material with good thermal conductivity, such as aluminum, copper, stainless steel, or carbon steel.

[0060] In some embodiments, the temperature control mechanism 300 further includes a cooling fan, which is installed on the side of the heat sink 340 away from the battery cell 100. By setting the cooling fan, the airflow near the heat sink 340 can be accelerated, which is beneficial to improving the heat dissipation efficiency of the heat sink 340 and enhancing the heat dissipation effect. Optionally, the cooling fan is also electrically connected to a power supply and communicatively connected to a control system. The control system can control the cooling fan to be turned on synchronously with the TEC thermoelectric cooler 330 when it is cooling.

[0061] See also Figure 1 and Figure 3 In this embodiment, the battery module can have two temperature control mechanisms 300, which are located on opposite sides of the height of the multiple battery cells 100, i.e., the top and bottom of the battery cells 100. The two temperature control mechanisms 300 are arranged symmetrically. By setting two temperature control mechanisms 300, the top and bottom of the battery cells 100 can be cooled or heated simultaneously, which helps to improve the overall temperature uniformity of the battery cells 100, resulting in excellent thermal management performance. This can accelerate heat dissipation or accelerate the heating of the battery cells 100, thereby ensuring that the battery cells 100 are at a more suitable operating temperature and extending the service life of the battery cells 100.

[0062] See Figure 3 and Figure 6The battery module in this embodiment also includes an electric heating film 600, which is sandwiched between two adjacent battery cells 100. The electric heating film 600 is connected to a power source and is used to heat the battery cells 100. By using the electric heating film 600, auxiliary heating of the battery cells 100 can be provided in winter when the ambient temperature is low, ensuring that the battery cells 100 are at an optimal operating temperature. Optionally, multiple electric heating films 600 are provided, with one electric heating film 600 between every two adjacent battery cells 100, thereby ensuring that each battery cell 100 can be heated by the electric heating film 600. Of course, in other embodiments, one electric heating film 600 can be provided every two or three battery cells 100, depending on the specific needs. This embodiment does not limit the number of electric heating films 600. For example, multiple electric heating films 600 are provided with connectors 610 at one end of the busbar 120 near the battery cell 100. The connectors 610 are electrically connected to the wires 620. Two adjacent electric heating films 600 are connected in series through the wires 620. One of the connectors 610 of the outermost electric heating film 600 is connected to the positive or negative terminal of the power supply to form a closed circuit. The power supply provides power to the electric heating film 600 to realize the heating function of the electric heating film 600. The battery cell 100 has good thermal management performance.

[0063] Optionally, a buffer pad 700 is also provided between the battery cell 100 and the protective plate 400. The buffer pad 700 can be made of foam, which is a high-resilience material. The buffer pad 700 can absorb part of the expansion generated by the battery cell 100 during operation, preventing the battery module from bulging or deforming. At the same time, when the battery module is subjected to vibration or collision, the buffer pad 700 can disperse the impact force, avoiding damage caused by direct friction between the battery cells 100, and improving the safety of the battery module.

[0064] This embodiment provides a battery device, including a battery box and multiple battery modules as described above. The battery modules are integrated and installed within the battery box, and are connected in series and / or in parallel. By using the above-mentioned battery modules, it can be ensured that all cells 100 within the multiple battery modules are at a suitable operating temperature, the temperature uniformity among the multiple cells 100 is good, the battery device has excellent performance, and a long service life. Furthermore, the overall weight of the battery device is relatively light, making it easy to integrate into drones used for flight, reducing flight energy consumption, and lowering costs.

[0065] This utility model also provides an electrical device, which includes the aforementioned battery module and is electrically connected to an electrical device. For example, the electrical device can be a drone. By using the aforementioned battery module, the temperature difference between the individual battery cells 100 can be minimized, multiple battery cells 100 can be kept at a suitable operating temperature, and the battery cells 100 have excellent performance, providing a stable current for the drone. Furthermore, the overall weight of the battery module is lighter, making the drone's flight more agile and nimble. Of course, in other embodiments, the battery module can also be used as a power source for other electrical devices, or as an energy storage unit for electrical devices. For example, mobile devices (including mobile phones, laptops, etc.), electric vehicles (e.g., pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc., but not limited to these.

[0066] Example 2

[0067] This embodiment provides a battery module; see [link / reference] Figures 8-11 The difference between this embodiment and the battery module in Embodiment 1 is that, according to the arrangement requirements of the battery module, the two temperature control mechanisms 300 in this embodiment are arranged on opposite sides of the width direction of the multiple battery cells 100. The width direction of the battery cells 100 is perpendicular to the stacking direction of the multiple battery cells 100. Figure 8 As shown in the Y-axis direction, the stacking direction of the multiple battery cells 100 is... Figure 8 The X-axis direction is shown in the diagram. The two temperature control mechanisms 300 are arranged symmetrically, stacked on either side of multiple battery cells 100. The two temperature control mechanisms 300 can simultaneously cool or heat both sides of the battery cell 100, which improves the overall temperature uniformity of the battery cell 100, resulting in excellent thermal management performance. This accelerates heat dissipation or heating of the battery cell 100, ensuring it operates at a suitable temperature and extending its lifespan.

[0068] This embodiment provides a battery device, including a battery box and multiple battery modules as described above. The battery modules are integrated and installed within the battery box, and are connected in series and / or in parallel. By using the above-mentioned battery modules, it can be ensured that all cells 100 within the multiple battery modules are at a suitable operating temperature, the temperature uniformity among the multiple cells 100 is good, the battery device has excellent performance, and a long service life. Furthermore, the overall weight of the battery device is relatively light, making it easy to integrate into drones used for flight, reducing flight energy consumption, and lowering costs.

[0069] This utility model also provides an electrical device, which includes the aforementioned battery module and is electrically connected to an electrical mechanism. For example, the electrical mechanism can be a drone. By using the aforementioned battery module, the temperature difference between the individual battery cells 100 can be minimized, multiple battery cells 100 can be kept at a suitable operating temperature, the battery cells 100 have excellent performance, and can provide a stable current to the drone. Furthermore, the overall weight of the battery module is lighter, making the drone's flight more agile and nimble.

[0070] The remaining structure of the battery module in this embodiment is the same as that in Embodiment 1, and will not be described again here.

[0071] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery module, characterized in that, include: Multiple battery cells (100) are stacked sequentially along the thickness direction of the battery cells (100); A heat-conducting plate (200) is disposed between two adjacent battery cells (100), and the heat-conducting plate (200) is capable of exchanging heat with the adjacent battery cell (100); A temperature control mechanism (300) is disposed on at least one side of the plurality of battery cells (100). The temperature control mechanism (300) includes a temperature equalization element and a temperature control element. The temperature equalization element and the temperature control element are arranged sequentially in a direction away from the battery cells (100). The temperature equalization element can exchange heat with the heat-conducting plate (200) to equalize the heat of the plurality of battery cells (100) and then transfer it to the temperature control element. The temperature control element is used to heat or cool the temperature equalization element.

2. The battery module according to claim 1, characterized in that, Multiple heat-conducting plates (200) are provided, and one heat-conducting plate (200) is provided between each pair of adjacent battery cells (100).

3. The battery module according to claim 1, characterized in that, The heat-conducting plate (200) includes a first body part (210) and a first folded edge (220). The first body part (210) is attached to the end face of the battery cell (100) in the thickness direction. The first folded edge (220) is connected to the side of the first body part (210) and is perpendicular to the first body part (210). The first body part (210) and the first folded edge (220) form a first accommodating space (201) for mounting the battery cell (100).

4. The battery module according to claim 1, characterized in that, The temperature control mechanism (300) includes an insulating element disposed between the plurality of battery cells (100) and the temperature equalization element, the insulating element being used to insulate and isolate the battery cells (100) and the temperature equalization element.

5. The battery module according to claim 4, characterized in that, The insulating element is an insulating film (310); and / or, the temperature equalization element is a temperature equalization plate (320).

6. The battery module according to claim 1, characterized in that, The temperature control device is a TEC thermoelectric cooler (330); the battery module includes a temperature sensor (500), which is located at the battery cell (100) and used to obtain the real-time temperature of the battery cell (100). Both the temperature sensor (500) and the TEC thermoelectric cooler (330) are communicatively connected to the control system.

7. The battery module according to claim 1, characterized in that, The temperature control mechanism (300) includes a radiator (340) disposed on one side of the temperature control unit, and the radiator (340) is used to dissipate heat from the temperature control unit.

8. The battery module according to claim 7, characterized in that, The radiator (340) includes a heat sink (341) and a plurality of heat sink fins (342), the plurality of heat sink fins (342) being spaced apart on the heat sink (341).

9. The battery module according to claim 1, characterized in that, The battery module also includes an electric heating film (600), which is sandwiched between two adjacent battery cells (100) and is used to heat the battery cells (100).

10. A battery device, characterized in that, The battery includes a battery box and a plurality of battery modules as described in any one of claims 1-9, wherein the plurality of battery modules are integrated and installed in the battery box, and the plurality of battery modules are connected in series and / or in parallel.

11. An electrical appliance, characterized in that, The battery module includes any one of claims 1-9.

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