A battery module

Abstract

The utility model relates to battery technology field discloses a kind of battery module, including shell and multiple battery units, multiple battery units are located in shell, multiple battery units are sequentially arranged and stacked into module main body, the side of shell is equipped with the reinforcing cavity that projects outward, the overall rigidity of battery module can be improved, so that when battery thermal runaway occurs, shell is not easy to be damaged, to improve safety, and when battery module is impacted by outside, reinforcing cavity can also dissipate stress, protect shell, to protect the battery cell and other components in shell. Explosion-proof vent and explosion-proof valve are also provided, which can discharge high-temperature flue gas, prevent heat accumulation from burning through the module shell, and protect other equipment, components and personnel safety of the aircraft. First fire baffle, second fire baffle and third fire baffle are also provided inside the battery module, further improving thermal protection safety. And the voltage, temperature and other information of the battery cell are collected by FPC, with high integration and small space occupation, and lighter weight.

Description

Technical Field

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

[0002] Currently, most electric aircraft battery modules have low sealing levels. This low sealing level allows high-temperature fumes generated during thermal runaway to leak haphazardly into the fuselage, affecting the normal operation of other aircraft systems or causing critical structural components to weaken due to high temperatures, and even potentially igniting. A fully sealed module structure, on the other hand, traps heat within the module, placing extremely high demands on the strength of the battery module casing. Insufficient casing rigidity can lead to an explosion risk if the casing cannot contain the heat generated by thermal runaway. To improve rigidity and safety, current technologies utilize large amounts of protective materials or increase casing thickness, but this significantly reduces the energy density of the battery module. Furthermore, current battery module casings are easily deformed under impact, potentially damaging the internal battery cell structure. Utility Model Content

[0003] The purpose of this invention is to provide a battery module with improved rigidity and safety.

[0004] To achieve the above objectives, this utility model provides a battery module, including a housing and multiple battery units, wherein the multiple battery units are disposed in the housing and are arranged and stacked sequentially to form the module body, and the side of the housing is provided with an outwardly protruding reinforcing cavity.

[0005] As a preferred embodiment, the system also includes several reinforcing plates disposed within the reinforcing cavity, which divide the reinforcing cavity into several non-communicating chambers.

[0006] As a preferred embodiment, the battery unit includes a battery cell and an assembly frame. The assembly frame is connected to both sides of the battery cell. The assembly frame includes a first frame, a second frame, and a third frame. The first frame and the third frame are ring-shaped structures. The two ends of the second frame are connected to the first frame and the third frame, respectively.

[0007] As a preferred embodiment, the battery cell further includes a heat spreader and an elastic fireproof heat insulation component. The heat spreader includes a heat spreader plate. One battery cell includes two battery cells and two heat spreaders. The battery cells are mounted on the heat spreaders, and the long and wide surfaces of the battery cells are in contact with the heat spreader plates of the heat spreaders. In one battery cell, the heat spreaders of the two heat spreaders are located between the two battery cells. The elastic fireproof heat insulation component is disposed between the heat spreaders of the two heat spreaders. The assembly frame is connected to the heat spreader plates.

[0008] As a preferred embodiment, the battery cell further includes a gasket disposed between the heat spreaders of the two heat spreaders of the same battery cell.

[0009] As a preferred embodiment, the housing includes a cover plate, side plates, end frames, sealing plates, and a bottom plate. Two side plates are provided, arranged parallel to each other. Two sealing plates are provided, arranged parallel to each other. The cover plate, side plates, sealing plates, and bottom plate are connected to form the outer peripheral surface of the housing. A plurality of battery cells are arranged sequentially along the length direction of the side plates. The reinforcing cavity is connected to the side plates. The end frames are located between the sealing plates and the battery cells closest to the sealing plates.

[0010] As a preferred embodiment, the side plate includes a first plate portion, a second plate portion, and a third plate portion. The first plate portion and the third plate portion are connected to both sides of the second plate portion, so that the cross-section of the side plate is a C-shaped structure. The first plate portion rests above the assembly frame of the end frame and the battery unit, and the second plate portion rests below the assembly frame of the end frame and the battery unit.

[0011] As a preferred embodiment, the module also includes an FPC board and a data acquisition board. The FPC board is attached to the side of the module body, and the data acquisition board is mounted on the end frame. The FPC board and the data acquisition board are communicatively connected.

[0012] As a preferred embodiment, a first fire baffle is provided between the top of the outer shell and the module body, and a second fire baffle is provided between the side of the outer shell and the module body.

[0013] As a preferred embodiment, a third fire baffle is also included, wherein the plurality of battery cells are divided into a plurality of battery packs, each battery pack includes one or more of the battery cells, and the third fire baffle is disposed between two adjacent battery packs.

[0014] As a preferred embodiment, the inner wall of the bottom surface of the housing is provided with a thermally conductive silicone grease layer.

[0015] As a preferred embodiment, the outer casing is provided with an explosion-proof vent that communicates with its interior, and an explosion-proof valve is provided at the explosion-proof vent.

[0016] As a preferred embodiment, the interior of the outer casing is provided with an explosion-proof chamber, which communicates with the explosion-proof vent. The explosion-proof chamber has a discharge port that communicates with the interior of the outer casing. The explosion-proof valve is located inside the explosion-proof chamber and includes a mounting plate, a baffle, and a spring. The mounting plate is connected to the inner wall of the explosion-proof chamber, the baffle is located at the discharge port, and the two ends of the spring are respectively connected to the mounting plate and the baffle. The explosion-proof vent is provided with a waterproof and breathable membrane and a waterproof and breathable membrane pressure plate.

[0017] As a preferred embodiment, the outer casing is provided with a positive terminal interface, a negative terminal interface, and a signal interface that communicate with its interior.

[0018] As a preferred embodiment, the outer shell is provided with an inwardly recessed lifting platform opening.

[0019] As a preferred embodiment, the outer casing is an aluminum alloy casing.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This invention improves the overall rigidity of the battery module by providing outwardly protruding reinforcing cavities on the side of the outer casing. This makes the casing less susceptible to damage in the event of thermal runaway, thus enhancing safety. Furthermore, when the battery module is subjected to external impacts, the reinforcing cavities absorb the stress, protecting the casing and, consequently, the internal components such as the battery cells. The reinforcing cavities also support sliding rail mounting of the battery module. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the battery module according to an embodiment of the present invention.

[0023] Figure 2 This is an exploded view of the battery module according to an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the structure of the battery cell according to an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the battery unit without battery cells installed in an embodiment of this utility model.

[0026] Figure 5 This is an exploded view of the battery unit of this utility model embodiment when no battery cells are installed.

[0027] Figure 6 This is a schematic diagram of the installation of the battery unit according to an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the main body of the module according to an embodiment of the present utility model.

[0029] Figure 8 This is a schematic diagram of the module body with a third fire baffle in an embodiment of this utility model.

[0030] Figure 9 This is a schematic diagram of the connection between the module body and the FPC board in an embodiment of this utility model.

[0031] Figure 10 This is a first-view cross-sectional schematic diagram of the outer shell of an embodiment of the present invention.

[0032] Figure 11 This is a schematic diagram of the exhaust channel according to an embodiment of the present invention.

[0033] Figure 12 This is a cross-sectional schematic diagram of the outer shell of an embodiment of the present invention from a second perspective.

[0034] Figure 13 This is a schematic diagram of the explosion-proof vent and explosion-proof valve configuration according to an embodiment of this utility model.

[0035] In the diagram, 1-outer shell; 101-cover plate; 102-side plate; 1021-first plate; 1022-second plate; 1023-third plate; 103-end frame; 104-sealing plate; 1041-lifting platform opening; 105-bottom plate; 106-positive terminal interface; 107-negative terminal interface; 108-signal interface; 109-explosion-proof vent; 2-battery unit; 201-cell; 2011-positive terminal tab; 2012-negative terminal tab; 202-assembly frame; 2021-first frame; 2022-second frame; 2023-third frame; 2024-second mounting hole; 203-heat spreader. ; 2031-Heat-spreading plate; 2032-Upper plate; 2033-Lower plate; 2034-Limiting foam; 2035-First mounting hole; 204-Elastic fireproof and heat-insulating component; 205-Gasket; 2051-Third mounting hole; 206-Connecting column; 207-Mounting column; 208-Fourth mounting hole; 3-Reinforced cavity; 4-Reinforced plate; 5-FPC plate; 6-Collection plate; 7-First fire baffle; 8-Second fire baffle; 9-Third fire baffle; 10-Explosion-proof valve; 1001-Mounting plate; 1002-Baffle; 1003-Spring; 1004-Guide column; 11-Waterproof and breathable membrane; 12-Waterproof and breathable membrane pressure plate. Detailed Implementation

[0036] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] In addition, in the description of the present utility model, unless otherwise stated, the meaning of "plurality" is two or more.

[0040] Embodiment 1

[0041] As Figures 1 to 13 shown, a battery module of a preferred embodiment of the present utility model includes a housing 1 and a plurality of battery cells 2. The plurality of battery cells 2 are arranged in the housing 1 and stacked in sequence to form a module body. A reinforcing cavity 3 protruding outward is provided on the side surface of the housing 1. In this embodiment, by providing a reinforcing cavity 3 protruding outward on the side surface of the housing 1, the overall stiffness of the battery module can be improved, so that when the battery undergoes thermal runaway, the housing 1 is not easily damaged, thereby improving safety. And when the battery module is subjected to an external impact, the reinforcing cavity 3 can also absorb the force and protect the housing 1, thereby protecting components such as the battery cells 201 in the housing 1. And the reinforcing cavity 3 can also support the battery module for rail-mounted installation.

[0042] Furthermore, the battery module of this embodiment further includes a plurality of reinforcing plates 4. The reinforcing plates 4 are arranged in the reinforcing cavity 3 and divide the reinforcing cavity 3 into a plurality of non-communicating chambers. The reinforcing plates 4 can further improve the strength and stiffness of the housing​​Specifically, in this embodiment, the battery unit 2 includes a cell 201 and an assembly frame 202. An assembly frame 202 is connected to each side of the cell 201. The assembly frame 202 includes a first frame 2021, a second frame 2022, and a third frame 2023. The first frame 2021 and the third frame 2023 are annular structures. The two ends of the second frame 2022 are connected to the first frame 2021 and the third frame 2023, respectively. The first frame 2021 and the third frame 2023 are annular structures. When the module body formed by stacking the battery units 2 is placed in the outer casing 1, the first frame 2021 of each battery unit 2 forms a channel, and the third frame 2023 of each battery unit 2 forms a channel. The formed channels can be used as exhaust channels for the flow of high-temperature flue gas during thermal runaway. In this embodiment, the radial dimension of the second frame 2022 is smaller than that of the first frame 2021 and the third frame 2023, making the assembly frame 202 a structure with a concave middle and convex ends. When the module body formed by the battery unit 2 is placed in the outer shell 1, there is a gap between the middle of the assembly frame 202 and the inner side wall of the outer shell 1, which can also form a high-temperature flue gas channel and facilitate the connection of the electrode tabs of the battery cell 201.

[0044] Furthermore, the battery cell 2 in this embodiment also includes a heat spreader 203 and an elastic fireproof and heat-insulating component 204. The heat spreader 203 includes a heat spreader plate 2031. One battery cell 2 includes two battery cells 201 and two heat spreaders 203. The battery cells 201 are mounted on the heat spreaders 203, and the long and wide surfaces of the battery cells 201 are in contact with the heat spreader plates 2031 of the heat spreaders 203. In one battery cell 2, the heat spreader plates 2031 of the two heat spreaders 203 are located between the two battery cells 201. The elastic fireproof and heat-insulating component 204 is disposed between the heat spreader plates 2031 of the two heat spreaders 203. The assembly frame 202 is connected to the heat spreader plates 2031. Optionally, the elastic fireproof and heat-insulating component 204 in this embodiment is foam. The foam can absorb tolerances during installation and can also prevent the heat generated by a single battery cell 201 from affecting adjacent battery cells 201. At operating temperatures, the foam acts as a thermally conductive material, resulting in a smaller temperature difference and better uniformity between batteries. At high temperatures, it becomes a porous material, which can then be used as a thermal insulation material to delay the spread of runaway heat. In the event of thermal runaway, the foam weakens its top heat transfer capacity. At high temperatures, the foam completely melts, forming air gaps, which, due to the low thermal conductivity of air, become a thermal insulation material to prevent heat transfer. In this embodiment, the heat spreader 203 is made entirely of aluminum, resulting in good heat spread. The heat spreader 203 in this embodiment also includes an upper plate 2032 and a lower plate 2033, which are connected to the upper and lower sides of the heat spreader 2031. The battery cell 201 is located between the upper plate 2032 and the lower plate 2033, and a limiting foam 2034 is also provided between the top surface of the battery cell 201 and the upper plate 2032.

[0045] In addition, the battery cell 2 in this embodiment also includes a gasket 205, which is disposed between the heat spreaders 2031 of the two heat spreaders 203 of the same battery cell 2. The gasket 205 is used to separate the two heat spreaders 203 and to prevent excessive pressure on the elastic fireproof heat insulation member 204.

[0046] Battery cell 2 also includes a connecting post 206. A first mounting hole 2035 is provided on the heat spreader 2031, a second mounting hole 2024 is provided on the assembly frame 202, and a third mounting hole 2051 is provided on the gasket 205. The connecting post 206 passes through the first mounting holes 2035 on the two heat spreaders 2031, the second mounting holes 2024 on the two assembly frames 202, and the third mounting hole 2051 on the gasket 205, thereby connecting the two heat spreaders 203, the gasket 205, and the two assembly frames 202 on the same side in one battery cell 2. In this embodiment, the assembly frame 202 is a plastic part. One end of the positioning post 206 is fixed in the second mounting hole 2024 of one of the assembly frames 202 on the same side. After passing through the heat spreader 2031 and the gasket 203, the other end of the positioning post 206 is melted to fix it in the second mounting hole 2024 of the other assembly frame 202 on the same side. The battery unit 2 also includes a mounting post 207. The first frame 2021 and the second frame 2022 are provided with a fourth mounting hole 208. The mounting post 207 passes through the fourth mounting hole 208 of each battery unit 2, thereby stacking and connecting multiple battery units 2 to form a module body.

[0047] Example 2

[0048] The difference between this embodiment and Embodiment 1 is that, based on Embodiment 1, this embodiment provides a further explanation of the outer casing 1.

[0049] The outer casing 1 of this embodiment includes a cover plate 101, side plates 102, end frames 103, sealing plates 104, and a bottom plate 105. There are two side plates 102, which are arranged in parallel and opposite to each other. There are also two sealing plates 104, which are arranged in parallel and opposite to each other. The cover plate 101, side plates 102, sealing plates 104, and bottom plate 105 are connected to form the outer peripheral surface of the outer casing 1. Multiple battery cells 2 are arranged sequentially along the length direction of the side plates 102. The reinforcing cavity 3 is connected to the side plates 102. The end frame 103 is located between the sealing plate 104 and the battery cell 2 closest to the sealing plate 104.

[0050] In this embodiment, the side plate 102 includes a first plate portion 1021, a second plate portion 1022, and a third plate portion 1023. The first plate portion 1021 and the third plate portion 1023 are connected to both sides of the second plate portion 1022, making the cross-section of the side plate 102 a C-shaped structure. The first plate portion 1021 rests on top of the assembly frame 202 of the end frame 103 and the battery unit 2, and the second plate portion 1022 rests below the assembly frame 202 of the end frame 103 and the battery unit 2. The C-shaped opening of the side plate 102 covers the upper and lower sides of the assembly frame 202 of the end frame 103 and the battery unit 2, allowing the side plate 102 to bear the load of the entire module, ensuring the flatness of the bottom surface of the module. This is beneficial for subsequent external thermal management equipment to be attached to the bottom of the battery module for thermal management, and is safer than traditional battery modules that rely on the welding points of the module base plate 105 for stress.

[0051] In this embodiment, the outer shell 1 is made of aluminum alloy, which has a certain rigidity and thermal protection capability. Furthermore, the cover plate 101, side plate 102, end frame 103, sealing plate 104, and bottom plate 105 in this embodiment are connected and sealed by laser welding, which ensures the rigidity of the entire module and its overall protection level can reach IP67.

[0052] Furthermore, the outer casing 1 of this embodiment is provided with an inwardly recessed lifting platform opening 1041. The lifting platform opening 1041 is used for lifting the entire battery module. In this embodiment, the lifting platform opening 1041 is provided on the sealing plate 104.

[0053] The battery module in this embodiment has a protruding reinforcing cavity 3 on its side, which gives the battery module high rigidity and thermal protection capability. When the battery module in this embodiment is assembled on the main beam of the body, it can be used as a crossbeam of the body, which improves the overall rigidity of the body, reduces the weight, and reduces the complexity of the body structure and the difficulty of fireproof and heat-insulating design.

[0054] The other structures in this embodiment are the same as in Embodiment 1, and will not be described again here.

[0055] Example 3

[0056] The difference between this embodiment and embodiment two is that, based on embodiment two, this embodiment provides a further explanation of the battery module.

[0057] In this embodiment, the battery module also includes an FPC board 5 and a data acquisition board 6. The FPC board 5 is attached to the side of the module body, and the data acquisition board 6 is mounted on the end frame 103. The FPC board 5 and the data acquisition board 6 are communicatively connected. The FPC board 5 is bonded to the tab surfaces on both sides of the module body and is used to collect information such as voltage and temperature of the battery cell 201. A data acquisition board 6 is mounted on each of the end frames 103 on both sides. The data acquisition board 6 processes the collected information and transmits it to the BMS (Battery Management System) through the signal interface 108. The FPC board 5 cable is lighter than traditional data acquisition cables. The data acquisition board 6 is mounted on the end frame 103 inside the housing 1, resulting in higher integration, less space occupation, and a simpler overall structure. The data acquisition board 6 is a PCB board.

[0058] Furthermore, the outer casing 1 of this embodiment is provided with a positive terminal interface 106, a negative terminal interface 107, and a signal interface 108 communicating with its interior. The positive terminal interface 106 is electrically connected to the positive terminal tab (2011) of the battery cell 201, the negative terminal interface 107 is electrically connected to the negative terminal tab (2012) of the motor, and the signal interface 108 is communicatively connected to the acquisition board 6. The positive terminal interface 106, the negative terminal interface 107, and the signal interface 108 all adopt aviation-grade waterproof connectors.

[0059] In addition, in this embodiment, a first fire baffle 7 is provided between the top of the outer shell 1 and the module body, and a second fire baffle 8 is provided between the side of the outer shell 1 and the module body. That is, the first fire baffle 7 is provided between the cover plate 101 and the module body, and the second fire baffle 8 is provided between the side plate 102 and the module body. The first fire baffle 7 and the second fire baffle 8 are insulating fireproof plates to ensure the insulation and thermal protection safety inside the module.

[0060] In addition, the battery module also includes a third fire baffle 9. The multiple battery cells 2 are divided into multiple battery packs, and each battery pack includes one or more battery cells 2. The third fire baffle 9 is located between two adjacent battery packs. The third fire baffle 9 is a metal fire baffle. The third fire baffle 9 divides the main body of the module into several regions. If a cell 201 in a single region experiences thermal runaway, it can be effectively isolated.

[0061] Furthermore, the inner wall of the bottom surface of the outer casing 1 in this embodiment is provided with a thermally conductive silicone grease layer. That is, the inner surface of the base plate 105 is provided with a thermally conductive silicone grease layer. The thermally conductive silicone grease layer is beneficial for heat conduction and dissipation. The heat generated by the battery cell 201 during operation can be transferred to the bottom of the module body through the heat dissipation plate 2031 on the assembly frame 202 of the battery cell 201. Depending on the configuration of the aircraft, the bottom surface of the battery module can be exposed for heat dissipation through air convection, or an external thermal management device can be attached to the bottom of the battery module for thermal management. If necessary, the base plate 105 of the battery module can be designed as a water-cooled plate structure, which can quickly remove the heat of the battery module after water is passed through it.

[0062] The other structures in this embodiment are the same as those in Embodiment 2, and will not be described again here.

[0063] Example 4

[0064] The difference between this embodiment and embodiment one is that, based on embodiment three, this embodiment provides a further explanation of the battery module.

[0065] In this embodiment, the outer shell 1 is provided with an explosion-proof vent 109 communicating with its interior, and an explosion-proof valve 10 is provided at the explosion-proof vent 109. When the battery module experiences thermal runaway, the heat will be quickly discharged to the outside of the outer shell 1 through the exhaust channel from the explosion-proof vent 109, preventing the heat from accumulating and burning through the outer shell 1, thus protecting the safety of other equipment, components, and personnel of the aircraft. In this embodiment, when the battery module experiences thermal runaway, the high-temperature flue gas flows in the channel formed between the first frame 2021, the third frame 2023, the second frame 2022 of the assembly frame 202 and the outer shell 1, and then the explosion-proof valve 10 is opened to discharge the high-temperature flue gas.

[0066] In this embodiment, the interior of the outer casing 1 is provided with an explosion-proof chamber, which communicates with the explosion-proof vent 109. The explosion-proof chamber has a discharge port that communicates with the interior of the outer casing 1. The explosion-proof valve 10 is located inside the explosion-proof chamber. The explosion-proof valve 10 includes a mounting plate 1001, a baffle 1002, and a spring 1003. The mounting plate 1001 is connected to the inner wall of the explosion-proof chamber. The baffle 1002 is located at the discharge port. The two ends of the spring 1003 are respectively connected to the mounting plate 1001 and the baffle 1002. The explosion-proof vent 109 is provided with a waterproof and breathable membrane 11 and a waterproof and breathable membrane pressure plate 12. The explosion-proof chamber is formed between the sealing plate 104, the end frame 103, the battery cell 201, and the side plate 102. In the event of thermal runaway, the high-temperature flue gas increases the internal pressure of the outer casing 1, which in turn pushes open the baffle 1002 at the outlet of the explosion-proof chamber. The baffle 1002 moves, compressing the spring 1003 and breaking the waterproof and breathable membrane 11's pressure plate 12, allowing the high-temperature flue gas to escape. When the high-temperature flue gas has mostly escaped, the internal pressure of the outer casing 1 gradually decreases, the spring 1003 recovers, and pushes the baffle 1002 to close the outlet, preventing a large amount of external oxygen from entering the outer casing 1 and reacting with the high-temperature substances inside, causing a fire. The explosion-proof valve in this embodiment also includes a guide post 1004, with the spring 1003 mounted on it. The baffle 1002 has a guide hole through which the guide post 1004 passes. The guide post 1004 guides the movement of the baffle 1002 and prevents the spring 1003 from bending.

[0067] The other structures in this embodiment are the same as in Embodiment 3, and will not be described again here.

[0068] In summary, this utility model embodiment provides a battery module that improves overall rigidity by providing an outwardly protruding reinforcing cavity 3 on the side of the outer shell 1. This makes the outer shell 1 less susceptible to damage in the event of thermal runaway, thus improving safety. Furthermore, the reinforcing cavity 3 can absorb stress when the battery module is subjected to external impact, protecting the outer shell 1 and the internal components such as the battery cell 201. The reinforcing cavity 3 also supports sliding rail mounting of the battery module. The outer shell 1 is made of aluminum alloy and uses laser welding for sealing. The positive terminal interface 106, negative terminal interface 107, and signal interface 108 use aerospace-grade waterproof connectors, ensuring the rigidity of the entire module and achieving an overall protection level of IP67. An explosion-proof vent 109 and an explosion-proof valve 10 are also provided to discharge high-temperature fumes, preventing heat accumulation and burn-through of the module outer shell 1, thus protecting other equipment, components, and personnel of the aircraft. The battery module also includes a first heat shield 7, a second heat shield 8, and a third heat shield 9 to further enhance thermal protection safety. Furthermore, this embodiment uses an FPC to collect voltage, temperature, and other information from the battery cell 201, resulting in high integration, small footprint, and lighter weight.

[0069] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery module, characterized in that, It includes a housing (1) and multiple battery units (2), the multiple battery units (2) are disposed in the housing (1), the multiple battery units (2) are arranged and stacked in sequence to form a module body, and the side of the housing (1) is provided with an outwardly protruding reinforcing cavity (3).

2. The battery module according to claim 1, characterized in that, It also includes several reinforcing plates (4), which are disposed inside the reinforcing cavity (3) and divide the reinforcing cavity (3) into several non-communicating chambers.

3. The battery module according to claim 1, characterized in that, The battery unit (2) includes a cell (201) and an assembly frame (202). The two sides of the cell (201) are respectively connected to an assembly frame (202). The assembly frame (202) includes a first frame (2021), a second frame (2022) and a third frame (2023). The first frame (2021) and the third frame (2023) are ring structures. The two ends of the second frame (2022) are respectively connected to the first frame (2021) and the third frame (2023).

4. The battery module according to claim 3, characterized in that, The battery unit (2) further includes a heat spreader (203) and an elastic fireproof heat insulation component (204). The heat spreader (203) includes a heat spreader plate (2031). One battery unit (2) includes two battery cells (201) and two heat spreaders (203). The battery cells (201) are mounted on the heat spreader (203), and the long and wide surfaces of the battery cells (201) are in contact with the heat spreader plate (2031) of the heat spreader (203). In one battery unit (2), the heat spreaders (2031) of the two heat spreaders (203) are located between the two battery cells (201). The elastic fireproof heat insulation component (204) is disposed between the heat spreaders (2031) of the two heat spreaders (203). The assembly frame (202) is connected to the heat spreader plate (2031).

5. The battery module according to claim 4, characterized in that, The battery cell (2) also includes a gasket (205) disposed between the heat spreaders (2031) of the two heat spreaders (203) of the same battery cell (2).

6. The battery module according to claim 3, characterized in that, The outer casing (1) includes a cover plate (101), a side plate (102), an end frame (103), a sealing plate (104), and a bottom plate (105). There are two side plates (102) arranged in parallel opposite directions. There are two sealing plates (104) arranged in parallel opposite directions. The cover plate (101), the side plate (102), the sealing plate (104), and the bottom plate (105) are connected to form the outer peripheral surface of the outer casing (1). A plurality of battery cells (2) are arranged sequentially along the length direction of the side plate (102). The reinforcing cavity (3) is connected to the side plate (102). The end frame (103) is located between the sealing plate (104) and the battery cell (2) closest to the sealing plate (104).

7. The battery module according to claim 6, characterized in that, The side plate (102) includes a first plate portion (1021), a second plate portion (1022) and a third plate portion (1023). The first plate portion (1021) and the third plate portion (1023) are connected to both sides of the second plate portion (1022), so that the cross-section of the side plate (102) is a C-shaped structure. The first plate portion (1021) rests on the top of the end frame (103) and the assembly frame (202) of the battery unit (2), and the second plate portion (1022) rests on the bottom of the end frame (103) and the assembly frame (202) of the battery unit (2).

8. The battery module according to claim 6, characterized in that, It also includes an FPC board (5) and a data acquisition board (6). The FPC board (5) is attached to the side of the module body, and the data acquisition board (6) is mounted on the end frame (103). The FPC board (5) and the data acquisition board (6) are connected in communication.

9. The battery module according to claim 1, characterized in that, A first fire baffle (7) is provided between the top of the outer shell (1) and the module body, and a second fire baffle (8) is provided between the side of the outer shell (1) and the module body.

10. The battery module according to claim 1, characterized in that, It also includes a third fire baffle (9), the multiple battery units (2) are divided into multiple battery groups, each battery group includes one or more of the battery units (2), and the third fire baffle (9) is disposed between two adjacent battery groups.

11. The battery module according to claim 1, characterized in that, The inner wall of the bottom surface of the outer casing (1) is provided with a thermally conductive silicone grease layer.

12. The battery module according to claim 1, characterized in that, The outer shell (1) is provided with an explosion-proof vent (109) communicating with its interior, and an explosion-proof valve (10) is provided at the explosion-proof vent (109).

13. The battery module according to claim 12, characterized in that, The outer shell (1) is provided with an explosion-proof chamber inside, which is connected to the explosion-proof vent (109). The explosion-proof chamber is provided with a discharge port that is connected to the interior of the outer shell (1). The explosion-proof valve (10) is located inside the explosion-proof chamber. The explosion-proof valve (10) includes a mounting plate (1001), a baffle (1002), and a spring (1003). The mounting plate (1001) is connected to the inner wall of the explosion-proof chamber. The baffle (1002) is located at the discharge port. The two ends of the spring (1003) are connected to the mounting plate (1001) and the baffle (1002) respectively. The explosion-proof vent (109) is provided with a waterproof and breathable membrane (11) and a waterproof and breathable membrane pressure plate (12).

14. The battery module according to claim 1, characterized in that, The outer casing (1) is provided with a positive terminal interface (106), a negative terminal interface (107) and a signal interface (108) that communicate with its interior.

15. The battery module according to claim 1, characterized in that, The outer shell (1) is provided with an inwardly recessed lifting platform opening (1041).

16. The battery module according to claim 1, characterized in that, The outer shell (1) is an aluminum alloy shell (1).

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