Battery module, battery pack and unmanned aerial vehicle

Abstract

The utility model relates to the technical field of energy storage, and provides a battery module, a battery pack and an unmanned aerial vehicle. The battery module comprises a shell, a battery module and a battery management system, the shell is a Kevlar shell. The battery modules are arranged in the shell, the number of the battery modules is at least two, and a heating unit is arranged between every two adjacent battery modules. The battery management system is arranged in the shell, the battery management system is electrically connected with each battery module, and the battery management system is electrically connected with each heating unit. Therefore, the weight of the battery module can be reduced, the strength of the battery module is improved, and the cruising ability of the battery module in a low-temperature environment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to a battery module, a battery pack and an unmanned aerial vehicle. Background Art

[0002] With the continuous development of drone technology, drones are being used more and more widely in various fields. As the core part of drone energy supply, battery modules have always been key factors restricting the development of drones, such as light weight, high energy density, reliability and life. In related technologies, drone battery modules are usually wrapped with heat shrink tubing. However, heat shrink tubing is easily damaged, resulting in poor safety and reliability of battery modules. At present, there are also solutions to wrap battery modules with metal casings such as aluminum alloy. However, metal casings are usually heavy, which is not conducive to the lightweight design of drones. At the same time, drone battery modules usually do not have a heating function, which results in poor endurance of drones in low temperature environments, or even inability to operate in low temperature environments. Utility Model Content

[0003] The embodiments of the utility model provide a battery module, a battery pack and a drone, which can reduce the weight of the battery module, increase the strength of the battery module, and improve the endurance of the battery module in a low temperature environment.

[0004] In a first aspect, an embodiment of the present utility model provides a battery module, comprising:

[0005] A shell, wherein the shell is a Kevlar shell;

[0006] A battery module is disposed in the housing, wherein the battery modules are arranged at intervals of at least two, and a heating unit is disposed between each two adjacent battery modules;

[0007] A battery management system is disposed in the housing, the battery management system is electrically connected to each of the battery modules, and the battery management system is electrically connected to each of the heating units.

[0008] In one embodiment, the thickness of the shell is 0.2 mm to 1 mm.

[0009] In one embodiment, the housing comprises:

[0010] A first shell and a second shell, at least one of the first shell and the second shell is configured with a storage cavity, the first shell is connected to the second shell to close the storage cavity, and the battery module and the battery management system are both arranged in the storage cavity.

[0011] In one embodiment, the first shell and / or the second shell is configured with a wire through hole, a cable is connected to the battery management system, the cable passes through the storage cavity from the wire through hole, and is connected to a first connector.

[0012] In one embodiment, a first docking hole is configured on a side of the first shell facing the second shell, and a second docking hole is configured on a side of the second shell facing the first shell. The first shell is docked with the second shell to connect the first docking hole with the second docking hole and form the wire hole.

[0013] In one embodiment, the first shell and / or the second shell is configured with a socket, the battery management system is connected to a second connector, and the second connector is adapted to the socket.

[0014] In one embodiment, the battery management system is configured to obtain a temperature parameter of the battery module and compare the temperature parameter with a preset temperature threshold, and the battery management system starts or stops the heating unit based on the comparison result.

[0015] In one embodiment, at least two of the battery modules are stacked in sequence along the thickness direction thereof.

[0016] In a second aspect, an embodiment of the present invention provides a battery pack, comprising the battery module as described above.

[0017] In a third aspect, an embodiment of the present utility model provides a drone, comprising the battery pack as described above.

[0018] Beneficial effects of the embodiments of the utility model:

[0019] In an embodiment of the utility model, by setting the outer shell as a Kevlar shell, the outer shell can be made lighter and stronger, thereby achieving lightweight of the battery module and improving the safety of the battery module. Based on setting a heating unit between the battery modules, the battery module can be heated by the heating unit to ensure that the battery module operates at an optimal temperature, thereby improving the battery life of the battery module and extending the service life of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1It is a three-dimensional schematic diagram of a battery module provided by an embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the explosion structure of the battery module provided;

[0023] Figure 3 is a three-dimensional schematic diagram of a first housing provided in an embodiment of the utility model;

[0024] Figure 4 is a three-dimensional schematic diagram of a second housing provided by an embodiment of the utility model;

[0025] Figure 5 It is a three-dimensional schematic diagram of a battery module provided by an embodiment of the utility model.

[0026] Reference numerals:

[0027] 10-housing, 110-first shell, 120-second shell, 130-storage cavity, 140-first docking hole, 150-second docking hole, 160-jack, 170-first flange, 180-second flange, 20-battery module, 30-heating unit, 40-battery management system, 410-cable, 420-first connector, 430-second connector, 50-wire hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0029] Specifically, Figures 1 to 5As shown, an embodiment of the present application provides a battery module. The battery module includes a housing 10, a battery module 20 and a battery management system 40. The housing 10 is a Kevlar housing. The battery module 20 is disposed in the housing 10, and the battery modules 20 are arranged at intervals of at least two, and a heating unit 30 is provided between each two adjacent battery modules 20. The battery management system 40 is disposed in the housing 10, and the battery management system 40 is electrically connected to each battery module 20, and the battery management system 40 is electrically connected to each heating unit 30.

[0030] In some embodiments, by setting the outer shell 10 as a Kevlar shell, the outer shell 10 can be made lighter and stronger, thereby achieving lightweight of the battery module and improving the safety of the battery module. Based on setting a heating unit 30 between the battery modules 20, the battery module 20 can be heated by the heating unit 30 to ensure that the battery module 20 operates at an optimal temperature, thereby improving the battery life of the battery module and extending the service life of the battery module.

[0031] It is understandable that the housing 10 is made of Kevlar material. The housing 10 based on Kevlar material can make the housing 10 have the advantages of low density, high strength, good toughness, high temperature resistance, high flame retardancy, high insulation and easy processing and molding. It can provide guarantee for the safety, lightness, reliability and long life of the battery module.

[0032] Specifically, the shell 10 made of Kevlar material has a density of only one-fifth of that of conventional steel and aluminum alloy shells, which can make the formed battery module meet the requirements of lightweight design. Compared with conventional heat shrink tubing, the shell 10 made of Kevlar material has high strength, can withstand greater impact force, can protect the internal battery module 20, and improve the safety of the battery module. Especially when the battery module is applied to drones, the drone will be subjected to huge impact force during launch and landing. The shell 10 made of Kevlar material can protect the battery module 20 and improve the safety of the battery module.

[0033] At the same time, the Kevlar shell 10 can also effectively wrap the battery module 20 due to its high strength. During the charging and discharging process of the battery module 20, the shell 10 can effectively restrain the expansion of the battery module 20, thereby improving the safety and life of the battery module. Based on the insulation, flame retardancy and high temperature resistance of the Kevlar shell 10, the battery module 20 can be effectively insulated from the outside world, ensuring the safety of the battery module, and effectively protecting the internal battery module 20, so that the battery module can be used in various harsh environments. In particular, when the battery module is applied to a drone, the drone can adapt to flight missions in various harsh environments, improving the applicability of the drone.

[0034] In some embodiments, the battery module 20 uses a high energy density soft-pack lithium-ion battery. For example, a lithium-ion cylindrical battery is used. As a result, the battery module 20 can have the characteristics of high energy density, long life, and fast charging. The battery modules 20 are arranged at intervals of at least two, and a heating unit 30 is arranged between each two adjacent battery modules 20. When operating in a low temperature environment, the heating unit 30 can heat the battery module 20 so that the battery module 20 operates at an optimal temperature, ensuring the safety and stable operation of the battery module 20, and effectively extending the service life of the battery module.

[0035] The battery management system 40 is electrically connected to the battery module 20 and the heating unit 30, so that the heating unit 30 can be powered by the battery module 20 to achieve heating of the heating unit 30. Although the heating unit 30 consumes a portion of the electric energy, the improvement of the temperature of the battery module 20 by the heating unit 30 can improve the working efficiency of the battery module 20 in a low temperature environment as a whole.

[0036] like Figure 5 As shown, at least two battery modules 20 are stacked in sequence along the thickness direction thereof, and a heating unit 30 is provided between each two adjacent battery modules 20. The length of the heating unit 30 is the same as the length of the battery module 20, the width of the heating unit 30 is the same as the width of the battery module 20, and the heating unit 30 fits the battery module 20. Thus, the heating unit 30 can heat the side with the largest surface area of ​​the battery module 20, so that the battery module 20 has the largest heating area, which is conducive to the rapid heating of the battery module 20.

[0037] In one embodiment, the battery management system 40 is configured to obtain temperature parameters of the battery module 20 and compare the temperature parameters with a preset temperature threshold. The battery management system 40 activates or deactivates the heating unit 30 based on the comparison result.

[0038] The battery management system 40 can not only electrically control the battery module 20 and the heating unit 30, but also collect the temperature parameters of the battery module 20. At the same time, the collected temperature parameters are compared with the preset temperature threshold to determine whether the heating unit 30 needs to be started or shut down. In this way, the battery module 20 is ensured to work at the optimal temperature to ensure the stable operation and safety of the battery module, and can effectively extend the service life of the battery module.

[0039] The heating temperature of the heating unit 30 is a fixed value, and the heating temperature of the heating unit 30 is greater than the maximum value of the temperature threshold. For example, the heating unit 30 is a resistive heating sheet. The battery management system 40 can collect the temperature parameters of the battery module 20 in real time. The temperature parameter is the temperature of the battery module 20, not the ambient temperature. Based on the comparison between the collected temperature parameters and the temperature threshold, it is determined whether the heating unit 30 needs to be started or turned off.

[0040] For example, the temperature threshold can be set to 0 degrees Celsius to 20 degrees Celsius, then the heating unit 30 is started when the collected temperature parameter is lower than 0 degrees Celsius, and the heating unit 30 is turned off when the collected temperature parameter is higher than 20 degrees Celsius. Alternatively, the temperature parameter can also be set to 5 degrees Celsius to 20 degrees Celsius. Alternatively, the temperature parameter can also be set to 5 degrees Celsius to 30 degrees Celsius.

[0041] Take the temperature threshold of 5 degrees Celsius to 20 degrees Celsius as an example. When the battery management system 40 detects that the temperature parameter of the battery module 20 is 4 degrees Celsius, the battery management system 40 drives the heating unit 30 to start, and heats the battery module 20 through the heating unit 30 to increase the temperature of the battery module 20. After the heating unit 30 heats the battery module 20 for a period of time, the battery management system 40 detects that the temperature parameter of the battery module 20 is 21 degrees Celsius, and the battery management system 40 drives the heating unit 30 to stop heating.

[0042] The battery management system 40 may also collect the voltage parameters of the battery in real time, and monitor the status of the battery module 20 based on the collection of the voltage parameters.

[0043] In some embodiments, the thickness of the outer shell 10 is 0.2 mm to 1 mm, thereby ensuring not only the lightweight and thinness of the outer shell 10 but also the adequate protection of the internal battery module 20 and the battery management system 40 by the outer shell 10 .

[0044] For example, the thickness of the housing 10 can be set to 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, or any value therebetween.

[0045] It is understandable that when the thickness of the outer shell 10 is less than 0.2 mm, the outer shell 10 may be insufficiently strong, making it impossible for the outer shell 10 to protect the internal battery module 20 and the battery management system 40. In particular, when the drone is subjected to a huge impact force during takeoff or landing, the internal battery module 20 or the battery management system 40 may be damaged. When the thickness of the outer shell 10 is greater than 1.0 mm, the outer shell 10 will be heavier and it will be difficult to meet the lightweight design requirements. In addition, the heavy weight of the outer shell 10 will increase the power consumption of the drone and reduce the endurance of the drone.

[0046] like Figure 2 As shown, in some embodiments, the housing 10 includes a first shell 110 and a second shell 120, at least one of the first shell 110 and the second shell 120 is configured with a storage cavity 130, the first shell 110 is connected to the second shell 120 to close the storage cavity 130, and the battery module 20 and the battery management system 40 are both disposed in the storage cavity 130.

[0047] It is understandable that the first shell 110 and the second shell 120 are both made of Kevlar material.

[0048] like Figure 3 and Figure 4 As shown, both the first shell 110 and the second shell 120 can be configured to have a structure of a storage cavity 130, and the storage cavities 130 provided on the first shell 110 and the second shell 120 are both open cavities, and both have openings. And the opening of the storage cavity 130 of the first shell 110 faces the opening of the storage cavity 130 of the second shell 120, so that the two storage cavities 130 can be connected after the first shell 110 and the second shell 120 are docked.

[0049] Based on the first shell 110 having the storage cavity 130, the first shell 110 can have a first flange 170 extending toward the second shell 120, and the first flange 170 is arranged around the periphery of the first shell 110, so that the storage cavity 130 opening toward the second shell 120 is formed based on the first flange 170 and the first shell 110. Similarly, the second shell 120 can have a second flange 180 extending toward the first shell 110, and the second flange 180 is arranged around the periphery of the second shell 120, so that the storage cavity 130 opening toward the first shell 110 is formed based on the second flange 180 and the second shell 120.

[0050] In some embodiments, the receiving cavity 130 may be formed only on the first shell 110, and the receiving cavity 130 forms an opening on the first shell 110. The second shell 120 may be a flat plate structure, so that the second shell 120 covers the opening of the first shell 110, thereby closing the receiving cavity 130.

[0051] In some embodiments, the receiving cavity 130 may be formed only on the second shell 120, and the receiving cavity 130 forms an opening on the second shell 120. The first shell 110 may be a flat plate structure, so that the first shell 110 covers the opening of the second shell 120, thereby closing the receiving cavity 130.

[0052] like Figure 1 As shown, in some embodiments, the first housing 110 and / or the second housing 120 are configured with a wire hole 50, and a cable 410 is connected to the battery management system 40, and the cable 410 passes through the storage cavity 130 from the wire hole 50 and is connected to the first connector 420. Thus, the battery management system 40 located inside the storage cavity 130 can be electrically connected to the first connector 420 located outside the storage cavity 130 through the cable 410. The first connector 420 is used to connect a corresponding model of a male connector or a female connector to achieve electrical connection between the battery management system 40 and external components.

[0053] Among them, the first connector 420 can be set to at least two, corresponding to at least two cables 410 connected to the battery management system 40, and at least two cables 410 pass through the storage cavity 130 from the wire hole 50. The first connector 420 connected to the at least two cables 410 can be of the same model or different models. For example, the first connector 420 is set to two, corresponding to two cables 410 connected to the battery management system 40, and the two cables 410 pass through the storage cavity 130 from the wire hole 50. The two cables 410 are respectively connected to different models of first connectors 420 to adapt to different models of connecting male heads and / or connecting female heads.

[0054] like Figure 3 and Figure 4 As shown, in some embodiments, a first docking hole 140 is configured on a side of the first shell 110 facing the second shell 120, and a second docking hole 150 is configured on a side of the second shell 120 facing the first shell 110. The first shell 110 is docked with the second shell 120 so that the first docking hole 140 is connected to the second docking hole 150 and a wire hole 50 is formed.

[0055] It is understandable that the first docking hole 140 is formed on the first flange 170 of the first shell 110, and the first docking hole 140 may be a waist-shaped hole or a semicircular hole. The second docking hole 150 is formed on the second flange 180 of the second shell 120, and the second docking hole 150 may be a waist-shaped hole or a semicircular hole. Based on the docking of the first shell 110 and the second shell 120, the first docking hole 140 is connected to the second docking hole 150, thereby forming the wire hole 50.

[0056] The sizes of the first docking hole 140 and the second docking hole 150 can be reasonably selected based on different types of battery modules, and can also be reasonably selected based on the outer diameter and number of cables 410 to be passed through.

[0057] The wire hole 50 is formed by splicing the first shell 110 and the second shell 120 , which is beneficial for the cable 410 to pass through the storage cavity 130 and facilitates the assembly and molding of the housing 10 .

[0058] For example, the first flange 170 of the first shell 110 may be provided with a stepped connection surface, and the second flange 180 of the second shell 120 may be provided with a matching stepped surface. The two stepped surfaces are closed and docked to achieve the positioning connection between the first shell 110 and the second shell 120.

[0059] For example, a first connecting portion in the shape of teeth may be provided on the first flange 170 of the first shell 110, and a second connecting portion in the shape of teeth matching therewith may be provided on the second flange 180 of the second shell 120. The first connecting portion and the second connecting portion are closed and docked to realize the positioning connection between the first shell 110 and the second shell 120.

[0060] For example, the outer surface of the first flange 170 of the first shell 110 may be provided with a snap-fit ​​portion, and the outer surface of the second flange 180 of the second shell 120 may be provided with a snap-fit ​​portion matching therewith. The snap-fit ​​portion may be snap-fitted to the snap-fit ​​portion, thereby achieving the positioning connection between the first shell 110 and the second shell 120.

[0061] In some embodiments, the first housing 110 and / or the second housing 120 is configured with a socket 160, and the battery management system 40 is connected with a second connector 430, which is adapted to the socket 160. The battery management system 40 can be electrically connected to external components through the cable 410 in conjunction with the first connector 420, and can also be electrically connected to external components through the socket 160 in conjunction with the second connector 430.

[0062] It is understandable that the male connector and / or the female connector of the external component can be inserted into the jack 160 and inserted into the second connector 430 to achieve electrical connection with the battery management system 40.

[0063] The jack 160 may be one or more, and may be selected based on the number of the second connectors 430. For example, only one jack 160 may be provided on the first housing 110. Alternatively, only one jack 160 may be provided on the second housing 120. Alternatively, multiple jacks 160 may be provided on the first housing 110 and the second housing 120, respectively.

[0064] It is understandable that the second connector 430 is compatible with the jack 160 , and the shape, size and position of the jack 160 all correspond to those of the second connector 430 .

[0065] In some embodiments, the housing 10 is filled with an adhesive for bonding the battery module 20 and the battery management system 40 to the housing 10. The battery module 20 and the battery management system 40 are bonded to the housing 10 by the adhesive, ensuring that the housing 10 reliably fixes the battery module 20 and the battery management system 40, and ensuring that the housing 10 effectively protects the battery module 20 and the battery management system 40.

[0066] The embodiment of the present application further provides a battery pack, which includes the battery module as described in the above embodiment.

[0067] In some embodiments, by setting the outer shell 10 as a Kevlar shell, the outer shell 10 can be made lighter and stronger, thereby achieving lightweight of the battery module and improving the safety of the battery module. Based on setting a heating unit 30 between the battery modules 20, the battery module 20 can be heated by the heating unit 30 to ensure that the battery pack operates at an optimal temperature, thereby improving the battery life of the battery pack and extending the service life of the battery pack.

[0068] The embodiment of the present application also provides a drone, which includes the battery pack in the above embodiment.

[0069] In some embodiments, by setting the outer shell 10 as a Kevlar shell, the outer shell 10 can be made lighter and stronger, which can achieve lightweight battery modules and improve the safety of the battery modules. Based on setting a heating unit 30 between the battery modules 20, the battery module 20 can be heated by the heating unit 30 to ensure that the battery module 20 of the drone operates at an optimal temperature, thereby improving the endurance of the drone and extending the service life of the battery module of the drone.

[0070] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery module, characterized in that: include: A shell, wherein the shell is a Kevlar shell; A battery module is disposed in the housing, wherein the battery modules are arranged at intervals of at least two, and a heating unit is disposed between each two adjacent battery modules; A battery management system is disposed in the housing, the battery management system is electrically connected to each of the battery modules, and the battery management system is electrically connected to each of the heating units.

2. The battery module according to claim 1, characterized in that: The thickness of the shell is 0.2 mm to 1 mm.

3. The battery module according to claim 1, characterized in that: The housing comprises: A first shell and a second shell, at least one of the first shell and the second shell is configured with a storage cavity, the first shell is connected to the second shell to close the storage cavity, and the battery module and the battery management system are both arranged in the storage cavity.

4. The battery module according to claim 3, characterized in that: The first shell and / or the second shell is configured with a wire through hole, a cable is connected to the battery management system, the cable passes through the storage cavity from the wire through hole, and is connected to a first connector.

5. The battery module according to claim 4, characterized in that: The first shell has a first docking hole on one side facing the second shell, and the second shell has a second docking hole on one side facing the first shell. The first shell is docked with the second shell to connect the first docking hole with the second docking hole and form the wire hole.

6. The battery module according to claim 3, characterized in that: The first shell and / or the second shell is configured with a socket, the battery management system is connected with a second connector, and the second connector is adapted to the socket.

7. The battery module according to any one of claims 1 to 6, characterized in that: The battery management system is configured to obtain a temperature parameter of the battery module and compare the temperature parameter with a preset temperature threshold. The battery management system starts or stops the heating unit based on the comparison result.

8. The battery module according to any one of claims 1 to 6, characterized in that: At least two of the battery modules are stacked in sequence along the thickness direction thereof.

9. A battery pack, characterized in that: Comprising a battery module as described in any one of claims 1 to 8.

10. A drone, characterized in that: Comprising the battery pack as claimed in claim 9.

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