Lithium battery box with high safety

Abstract

A lithium battery box with high safety comprises a box body, a battery module and a battery management module, at least 5 / 6 areas in the box body are used for installing the battery module, the rest areas are used for installing the battery management module, a protection assembly is arranged in the box body, at least three faces of the protection assembly are combined with the inner wall of the box body, and therefore the safety of the lithium battery box is improved. According to the battery module, the inner wall and the bottom plate are combined, the supporting part and the protection part are arranged at the joint, the protection layer is defined by the inner wall, the supporting part, the protection part and the bottom plate, so that the protection layer is arranged between the battery module and the box body, an enough protection effect is achieved, and the protection layer is hollow or filled with a protection material with certain hardness to improve the protection effect; the inner side of the protection assembly further comprises a buffer layer used for wrapping the battery module, the buffer layer is tightly attached between the protection part and the battery module so that the battery module can be limited in the protection assembly, additional parts are not needed for fixing, installation procedures are reduced, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery boxes, in particular to a lithium battery box with high safety. Background Art

[0002] With the development of vehicle technology, electric vehicle technology has become more mature, so various low-speed battery vehicles have appeared in life, such as sightseeing cars, patrol cars, golf carts and other low-speed vehicles. The battery packs in these low-speed vehicles are usually powered by lithium battery packs. Different models will be equipped with different numbers of lithium batteries according to needs to meet usage requirements. In order to match different numbers of lithium battery packs, these lithium battery packs need to be placed in the battery box to ensure the safety of the battery and facilitate the loading and unloading of the battery.

[0003] In the existing battery box, such as the lithium battery box and battery pack disclosed in the Chinese patent with patent application number CN202321007379.X, it includes a box body, a receiving cavity is opened in the box body, the receiving cavity is used to receive the battery module, a positioning groove connected with the receiving cavity is formed in the box body, the positioning groove is used to position the battery module, and a step structure is formed on the inner wall of the receiving cavity adjacent to the opening of the positioning groove; the lithium battery box also includes a positioning fixing part and a pressing part, the positioning fixing part is located in the receiving cavity, the positioning fixing part is connected to the box body, the positioning fixing part and the step structure are used together to position and clamp the two sides of the battery module; the pressing part is located in the box body and connected to the box body, the pressing part is used to press and fix the top surface of the battery module, the structure is simple and the installation operation is relatively simple, so that the installation efficiency is high.

[0004] However, in the above structure, the outer wall of the box is a single-layer structure, which cannot provide adequate protection for the battery module. It is easy to be penetrated by sharp objects, thereby causing damage to the battery. Moreover, in this structure, the battery module needs to be fixed by other auxiliary components after being installed in the accommodating cavity. This fixing method not only increases the difficulty of installing the battery pack, but also increases the installation process, which is not conducive to cost saving. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a lithium battery box with high safety.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A lithium battery box with high safety comprises a box body, a battery module and a battery management module, wherein at least 5 / 6 of the area in the box body is used to install the battery module, and the remaining area is used to install the battery management module, and a protective component for protecting the battery module is provided in the box body, wherein at least three surfaces of the protective component are engaged with the inner wall of the box body, and the remaining surface faces the inside of the box body and separates the battery module from the battery management module, and the protective component for engaging the inner wall of the box body comprises a supporting portion for connecting with the inner wall of the box body and a protective portion for fitting the battery module, and the protective portion facing the box body The protective component on one side of the interior of the body only includes a protective part, one end of the support part is fixedly connected to the inner wall of the box body, and the other end extends inward perpendicular to the inner wall of the box body, the top of the protective part is fixedly connected to the extended end of the support part, and the other end extends downward in parallel to the inner wall of the box body to the bottom plate of the box body and is fixedly connected to the bottom plate, the extension length of the support part is 1 / 15-1 / 12 of the protective part, and the extension length of the protective part is 7 / 10-9 / 10 of the height of the battery module, and the inner wall of the box body, the support part, the protective part and the bottom plate together form a protective layer.

[0008] Furthermore, the protective layer is hollow inside or filled with protective materials.

[0009] Furthermore, the inner side of the protective component also includes a buffer layer for wrapping the battery module, the buffer layer is tightly fitted between the protective part and the battery module, the buffer layer confines the battery module within the protective component through friction, and the buffer layer extends upward from the bottom plate of the box to a position flush with the height of the battery module.

[0010] Furthermore, the buffer layer may be made of a soft rubber material or a sticky foam material.

[0011] Furthermore, a heat insulating layer is provided between the battery module and the buffer layer, and the heat insulating layer is an epoxy board.

[0012] In the utility model, an interface panel is provided on the box wall on the side of the box close to the battery management module. The interface panel is connected to the battery module after passing through the battery management module. A fuse that can forcibly cut off the main line is also connected between the battery management module and the battery module.

[0013] Furthermore, one end of the fuse is mounted on a vibration switch, and when encountering strong vibration, the vibration switch controls one end of the fuse to be disconnected from the main circuit.

[0014] In the utility model, the battery management module includes a central control module, an overload protection module, and a temperature monitoring module. The overload protection module and the temperature monitoring module are electrically connected to the central control module. The central control module is connected to the main line. The overload protection module detects the magnetic field strength and current strength of the main line through a Hall sensor; the temperature monitoring module monitors the battery temperature through a temperature sensor, and the temperature sensor transmits the temperature data to the central control module in real time. The central control module adjusts the temperature by controlling the battery power.

[0015] In the utility model, the lithium battery box can be used alone or in combination.

[0016] The utility model has the following advantages and beneficial effects:

[0017] By arranging a protection component in the box, the protection component has at least three surfaces connected to the inner wall of the box, and the connection includes a supporting part and a protecting part. A protective layer is formed by enclosing the inner wall, the supporting part, the protecting part and the bottom plate. In this way, a protective layer can be arranged between the battery module and the box to achieve sufficient protection. The interior of the protective layer is hollow or filled with a protective material with a certain hardness to improve the protection effect. The inner side of the protection component also includes a buffer layer for wrapping the battery module. The buffer layer fits tightly between the protecting part and the battery module so that the battery module is confined in the protection component. It does not need to be fixed by additional components, thereby reducing the installation process and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] Figure 1 Schematic diagram of the lithium battery box in this embodiment;

[0020] Figure 2 is a top view of the lithium battery box in this embodiment;

[0021] Figure 3 is a cross-sectional view of the lithium battery box in this embodiment;

[0022] Figure 4 This is a schematic diagram of the combined use of lithium battery boxes in this embodiment. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention, but the present invention is not limited to the following embodiments.

[0024] like Figures 1 to 3As shown, the present embodiment discloses a lithium battery box with high safety, including a box body 1, a battery module 2 and a battery management module 3, at least 5 / 6 of the area in the box body 1 is used to install the battery module 2, and the remaining area is used to install the battery management module 3, the box body 1 is provided with a protective component 4 for protecting the battery module 2, at least three surfaces of the protective component 4 are engaged with the inner wall of the box body 1, and the remaining surface faces the inside of the box body 1 and separates the battery module 2 and the battery management module 3, the protective component 4 for engaging the inner wall of the box body 1 includes a support portion 40 for connecting to the inner wall of the box body 1 and a protective portion 41 for fitting the battery module 2, one end of the support portion 40 is fixedly connected to the inner wall of the box body 1 at a certain height, and the other end is fixedly connected to the inner wall of the box body 1 at a certain height. The end extends inwardly perpendicular to the inner wall of the box body 1, the top of the protective part 41 is fixedly connected to the extended end of the support part 40, and the other end extends downwardly parallel to the inner wall of the box body 1 to the bottom plate of the box body 1 and is fixedly connected to the bottom plate, the extension length of the support part 40 is 1 / 15-1 / 12 of the protective part 41, and the extension length of the protective part 41 is 7 / 10-9 / 10 of the height of the battery module 2. The inner wall of the box body 1, the support part 40, the protective part 41 and the bottom plate together form a protective layer 42. It can be determined that the protective component 4 facing the inner side of the box body 1 only includes the protective part 41, and the protective layer 42 is hollow inside or can be filled with a protective material with a certain hardness to improve the protective effect.

[0025] Furthermore, the inner side of the protective component 4 also includes a buffer layer 43 for wrapping the battery module 2. The buffer layer 43 is tightly fitted between the protective part 41 and the battery module 2. The buffer layer 43 limits the battery module 2 in the protective component 4 through friction. Specifically, the buffer layer 43 extends upward from the bottom plate of the box body 1 to a position flush with the height of the battery module 2, which can improve the protection effect. In order to improve the fixing effect of the battery module 2, the buffer layer 43 can be a soft rubber material or a sticky foam material, which not only has a buffering effect, but also has a tight fitting effect.

[0026] Furthermore, the battery module 2 generates heat during operation, and the generated heat will cause the buffer layer 43 to deform or lose its tight fitting effect. Therefore, a heat insulation layer 44 is provided between the battery module 2 and the buffer layer 43. The heat insulation layer 44 is an epoxy board, which has excellent heat resistance, corrosion resistance and flame retardancy, and can play a heat insulation effect.

[0027] In this embodiment, an interface panel 11 is provided on the wall of the box body 1 on the side of the box body 1 close to the battery management module 3. The interface panel 11 is connected to the battery module 2 after passing through the battery management module 3. A fuse 30 is also connected between the battery management module 3 and the battery module 2. When the battery is short-circuited, the fuse 30 can forcibly cut off the main line to protect the battery.

[0028] Furthermore, in order to further improve the safety of the battery, when the battery box falls from a height or encounters strong bumps, in order to avoid internal short circuit of the battery, it is also necessary to cut off the main line. Therefore, one end of the fuse 30 is installed on the vibration switch 31. When encountering strong vibration, the vibration switch 31 works to disconnect one end of the fuse 30 from the main line, thereby achieving a protective effect.

[0029] In this embodiment, the battery management module 3 includes a central control module 32, an overload protection module 33, and a temperature monitoring module 34. The overload protection module 33 and the temperature monitoring module 34 are electrically connected to the central control module 32. The central control module 32 is connected to the main line. The overload protection module 33 mainly detects the magnetic field strength and current strength of the main line through a Hall sensor, thereby realizing the measurement and control of current, voltage, power, etc., helping to monitor and control the charging and discharging process of the battery, and ensuring the safety and efficient operation of the battery; the temperature monitoring module 34 monitors the battery temperature through a temperature sensor pasted between the battery modules 2, and transmits the temperature data to the central control module 32 in real time. The central control module 32 adjusts the temperature by controlling the battery power; when necessary, the main line can be cut off to ensure battery safety.

[0030] Not limited to the above embodiments, Figure 4 As shown, the battery box can not only be used alone, but also can be used in combination of two or more battery boxes; when two battery boxes are used in combination, the fuse 30 and the battery management module 30 can be installed in the two battery boxes respectively, and the two are connected in series with each other; when connected, the positive / negative line is led out from the interface panel 11 of one of the battery boxes and connected to the negative / positive pole of the interface panel 11 of the other battery box, thereby realizing series connection.

[0031] Specifically, the interface panel 11 is also provided with a communication interface for connecting to a display, through which the working status of the lithium battery can be displayed in real time, facilitating monitoring and management.

[0032] The above contents described in this specification are merely examples of the present invention. Technicians in the technical field to which the present invention belongs can make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the contents of the present invention specification or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A lithium battery box with high safety, comprising a box body (1), a battery module (2) and a battery management module (3), characterized in that: At least 5 / 6 of the area in the box (1) is used to install the battery module (2), and the remaining area is used to install the battery management module (3). A protective component (4) for protecting the battery module (2) is provided in the box (1). At least three surfaces of the protective component (4) are connected to the inner wall of the box (1), and the remaining surface faces the inside of the box (1) and separates the battery module (2) and the battery management module (3). The protective component (4) for connecting to the inner wall of the box (1) includes a support portion (40) for connecting to the inner wall of the box (1) and a protective portion (41) for fitting the battery module (2), while the protective component (4) on the side facing the inside of the box (1) only includes a support portion (40) for connecting to the inner wall of the box (1) and a protective portion (41) for fitting the battery module (2). The protective portion (41) includes a protective portion, one end of the support portion (40) is fixedly connected to the inner wall of the box body (1), and the other end extends inwardly perpendicular to the inner wall of the box body (1); the top of the protective portion (41) is fixedly connected to the extended end of the support portion (40), and the other end extends downwardly parallel to the inner wall of the box body (1) to the bottom plate of the box body (1) and is fixedly connected to the bottom plate; the extended length of the support portion (40) is 1 / 15 to 1 / 12 of the protective portion (41), and the extended length of the protective portion (41) is 7 / 10 to 9 / 10 of the height of the battery module (2); the inner wall of the box body (1), the support portion (40), the protective portion (41) and the bottom plate together form a protective layer (42).

2. A lithium battery box with high safety according to claim 1, characterized in that: The protective layer (42) is hollow inside or filled with protective material.

3. A lithium battery box with high safety according to claim 1, characterized in that: The inner side of the protection component (4) further comprises a buffer layer (43) for wrapping the battery module (2); the buffer layer (43) is tightly fitted between the protection portion (41) and the battery module (2); the buffer layer (43) restricts the battery module (2) within the protection component (4) through the action of friction; the buffer layer (43) extends upward from the bottom plate of the box body (1) to a position flush with the height of the battery module (2).

4. A lithium battery box with high safety according to claim 3, characterized in that: The buffer layer (43) may be made of a soft rubber material or a sticky foam material.

5. A lithium battery box with high safety according to claim 3, characterized in that: A heat insulation layer (44) is further provided between the battery module (2) and the buffer layer (43), and the heat insulation layer (44) is an epoxy board.

6. A lithium battery box with high safety according to claim 1, characterized in that: An interface panel (11) is provided on a wall of the box body (1) on a side of the box body (1) close to the battery management module (3); the interface panel (11) is connected to the battery module (2) after passing through the battery management module (3); and a fuse (30) capable of forcibly disconnecting the main line is also connected between the battery management module (3) and the battery module (2).

7. A lithium battery box with high safety according to claim 6, characterized in that: One end of the fuse (30) is mounted on a vibration switch (31), and when strong vibration occurs, the vibration switch (31) controls one end of the fuse (30) to be disconnected from the main circuit.

8. A lithium battery box with high safety according to claim 6, characterized in that: The battery management module (3) comprises a central control module (32), an overload protection module (33), and a temperature monitoring module (34); the overload protection module (33) and the temperature monitoring module (34) are electrically connected to the central control module (32); the central control module (32) is connected to a main line; the overload protection module (33) detects the magnetic field strength and current strength of the main line through a Hall sensor; the temperature monitoring module (34) monitors the battery temperature through a temperature sensor; the temperature sensor transmits the temperature data to the central control module (32) in real time; and the central control module (32) adjusts the temperature by controlling the battery power.

9. A lithium battery box with high safety according to any one of claims 1 to 8, characterized in that: The lithium battery box can be used alone or in combination.

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