Power battery module with protection function

Abstract

The utility model discloses a power battery module with a protection function, and belongs to the field of rechargeable batteries. According to the utility model, the peripheral protective sleeve, the bottom protective pad and the external protective sleeve are arranged, the peripheral protective sleeve is formed by integrally connecting the two first protective plates and the two second protective plates and is sleeved on the periphery of the battery core body, and the bottom protective pad is arranged at the bottom of the battery core body and is formed by thermal shrinkage through the external protective sleeve; the periphery protection sleeve and the bottom protection pad are arranged outside the periphery protection sleeve and the bottom protection pad in a sleeving mode, the periphery protection sleeve and the bottom protection pad are rapidly fixed, the periphery protection sleeve and the bottom protection pad are not provided with barbs, the battery cannot be damaged, meanwhile, the periphery protection sleeve and the bottom protection pad can resist puncture, all faces of the power battery are protected, and the service life of the power battery is prolonged. The whole structure is simple, the manufacturing cost is low, the production efficiency is high and the battery protection effect is good.

Description

Technical Field

[0001] The utility model relates to the field of rechargeable batteries, in particular to a power battery module with a protective function. Background Art

[0002] Lithium-ion batteries (LIBs) are widely used in portable electronics, electric vehicles, and energy storage systems due to their high energy density, good cycle performance, and no memory effect. However, the safety of lithium-ion batteries has always been a key and difficult issue in research and application.

[0003] Especially in the field of remote control models, when the model is being manipulated, the power battery module is prone to collision with the remote control model. When charging is required, the power battery module usually needs to be removed from the remote control model, and frequent operations can easily cause the risk of the battery falling. When charging, the charging environment of the power battery module is difficult to ensure safety, and it is easy to collide with other objects. It can be seen that it is inevitable that the power battery module will fall or bump during use. However, in conventional power battery modules, the surface of the battery cell is very easy to be scratched during the process of falling or bumping, and further lead to short circuit fire, or even explosion, thus creating a product safety hazard. Front and back

[0004] In the case of protective designs, aluminum sheets are usually placed on the front and back of the battery assembly, and then the whole assembly is trapped. The aluminum sheet has sufficient hardness to prevent damage to the battery assembly. However, aluminum sheets are metal and are relatively heavy materials. The processing of aluminum sheets is usually punching, and burrs are difficult to avoid on the processed surface, which will damage the surface of the battery cell during use.

[0005] At the same time, it is understandable that improving production efficiency and reducing production costs are issues that the lithium-ion battery industry needs to pay constant attention to.

[0006] It can be seen that the market is in urgent need of a power battery module that meets production efficiency and cost requirements and can adapt to provide protection when the battery falls or collides. Utility Model Content

[0007] In order to solve the problems existing in the prior art, the main purpose of the utility model is to provide a power battery module with a protective function, which can realize the protection of the battery when it falls or collides, while meeting the requirements of production efficiency and production cost.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A power battery module with a protective function, the power battery module comprising a battery core, the battery core being configured in a rectangular parallelepiped shape, wherein the battery core has two first opposite sides with the largest area, two second opposite sides with the smallest area, and the remaining two third opposite sides, the second side of the top of the battery core being electrically connected to a wire, wherein the power battery module further comprises a surrounding protective cover, a bottom protective pad and an external protective cover,

[0010] The surrounding protective cover includes two first protective plates and two second protective plates, wherein the shape of the first protective plates matches the first side surface of the battery core, and the shape of the second protective plates matches the third side surface of the battery core; each of the first protective plates and the second protective plates are connected by integrally forming plastic, so that the surrounding protective cover is sleeved and surrounds each of the first side surface and the third side surface of the battery core;

[0011] The bottom protective pad has a shape matching the second side surface of the battery core and is disposed on the second side surface of the bottom of the battery core;

[0012] The outer protective sleeve is a heat shrinkable sleeve, which is sleeved outside the surrounding protective sleeves and wraps the bottom protective pad and the second side surface of the top of the battery core.

[0013] Optionally, each of the first protective plates and each of the second protective plates are hollowed out and provided with array holes.

[0014] Optionally, the power battery module further includes a corner protection pad, which is fixed outside the external protective sleeve and arranged on the corner of the battery core.

[0015] Optionally, eight corner protection pads are provided, respectively located on eight corners of the battery core.

[0016] Optionally, the corner protection pad is provided with three mutually perpendicular extension ends.

[0017] Optionally, the corner protection pad is made of plastic material.

[0018] Optionally, the bottom protective pad is made of plastic material.

[0019] Optionally, the wire is a charging and discharging wire.

[0020] Optionally, the conductors include charging and discharging conductors and balancing charging conductors.

[0021] Optionally, the battery core is formed by electrically connecting at least two battery cells.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] (1) The utility model provides a surrounding protective sleeve, a bottom protective pad and an external protective sleeve, wherein the surrounding protective sleeve is formed by two first protective plates and two second protective plates connected to each other in one piece and sleeved on the outer periphery of the battery core, while the bottom protective pad is arranged at the bottom of the battery core, and then the external protective sleeve is formed by heat shrinkage and sleeved on the surrounding protective sleeve and the bottom protective pad, so that the surrounding protective sleeve and the bottom protective pad are quickly fixed. The surrounding protective sleeve and the bottom protective pad themselves have no barbs and will not damage the battery. At the same time, the surrounding protective sleeve and the bottom protective pad are puncture-resistant, so that all sides of the power battery are protected. The overall structure is simple, the manufacturing cost is low, the production efficiency is high, and the battery protection effect is good.

[0024] (2) The utility model further provides a hollow array of holes on the surrounding protective cover, which not only reduces the weight but also plays a role in heat dissipation to a certain extent.

[0025] (3) The present invention further provides corner protection pads, which not only can play the role of battery drop shock absorption, but also the corner protection pads are arranged outside the external protective cover, which can to a certain extent block the external protective cover from contact with other objects and reduce damage.

[0026] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a three-dimensional structure of a power battery module with a protective function according to an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of an exploded three-dimensional structure of a power battery module with a protection function according to an embodiment of the utility model;

[0029] Figure 3 A schematic diagram of the three-dimensional structure of the surrounding protective cover according to the utility model.

[0030] Figure numerals: 10, battery core; 20, surrounding protective cover; 21, first protective plate; 22, second protective plate; 23, array hole; 30, bottom protective pad; 40, outer protective cover; 50, corner protective pad; 60, charging and discharging wire; 70, balance charging wire. DETAILED DESCRIPTION

[0031] In order to better illustrate the purpose, technical solution and advantages of the utility model, the specific implementation of the utility model is further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but are not intended to limit the scope of the utility model.

[0032] like Figures 1 to 3As shown, a power battery module with a protective function according to an embodiment of the utility model. The power battery module includes a battery core 10, a surrounding protective cover 20, a bottom protective pad 30 and an external protective cover 40, a corner protective pad 50, a charge and discharge wire 60 and a balance charge wire 70. Among them, the battery core 10 is formed by electrically connecting at least two battery cells. Each battery cell is in the shape of a rectangular parallelepiped with the same size. The battery core 10 composed of stacked battery cells is also in the shape of a rectangular parallelepiped. The two opposite sides with the largest area in the battery core 10 are the first sides. When the number of battery cells is small, the first side is usually the front and back of the battery core 10. The two opposite sides with the smallest area in the battery core 10 are the second sides, and the remaining two opposite sides of the battery core 10 are the third sides.

[0033] In detail, the surrounding protective cover 20 is composed of two first protective plates 21 and two second protective plates 22. Among them, the shape of the first protective plate 21 matches the first side of the battery core 10, and the size is slightly larger than the first side of the battery core 10. The shape of the second protective plate 22 matches the third side of the battery core 10, and the size is slightly larger than the third side of the battery core 10. The two first protective plates 21 are arranged opposite to each other, and the two second protective plates 22 are also arranged opposite to each other, and each first protective plate 21 and second protective plate 22 is also surrounded by a rectangular parallelepiped shape as a whole. Among them, each enclosed first protective plate 21 and second protective plate 22 is made of plastic integrally molded. The surrounding protective cover 20 can be inserted into the battery core 10 from the top or bottom (i.e., the second side) of the battery core 10. After insertion, the surrounding protective cover 20 is set and surrounds each first side and third side of the battery core 10.

[0034] Specifically, the bottom protection pad 30 is also made of plastic material, and its shape matches the second side surface of the battery core 10. After the surrounding protection sleeve 20 is inserted into the battery core 10, the bottom protection pad 30 can be fixedly arranged on the second side surface of the bottom of the battery core 10 by gluing or other methods.

[0035] In detail, the outer protective cover 40 of the bottom protective pad 30 is a heat shrink tube, which is sleeved outside the surrounding protective cover 20. After heating, the heat shrink tube shrinks and tightly wraps the surrounding protective cover 20, and then the ends of the surrounding protective cover 20 shrink to wrap the bottom protective pad 30 and the second side of the top of the battery core 10.

[0036] It can be seen that in the present invention, the two first side surfaces and the two third side surfaces of the battery core 10 are protected by the surrounding protective sleeves 20 to prevent puncture by hard objects. The second side surface of the bottom of the battery core 10 is protected by the bottom protective pad 30 to prevent puncture by hard objects. The bottom of the battery core 10 is provided with charging and discharging wires 60 and a balance charging wire 70, which are not easy to collide. The external protective sleeve 40, on the one hand, reinforces the surrounding protective sleeves 20 and the bottom protective pad 30, and on the other hand, prevents damage such as scratches.

[0037] Specifically, in this embodiment, each first protective plate 21 and each second protective plate 22 is hollowed out to be provided with array holes 23 .

[0038] Specifically, in this embodiment, eight corner protection pads 50 are provided, and the corner protection pads 50 are fixedly provided outside the outer protective cover 40 and provided at the eight corners of the battery core 10. The corner protection pads 50 are made of plastic material and provided with three mutually perpendicular extension ends. When the power battery module is placed on a plane, the corner protection pads 50 will contact the plane to prevent the outer protective cover 40 from being worn. When the power battery module falls, the corner protection pads 50 will play a shock-absorbing role.

[0039] The above embodiments mainly describe the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A power battery module with a protective function, the power battery module comprising a battery core (10), the battery core (10) being configured in a rectangular parallelepiped shape, wherein: The battery core (10) has two first side surfaces with the largest areas, two second side surfaces with the smallest areas, and two third side surfaces with the remaining areas. The second side surface at the top of the battery core (10) is electrically connected to a wire. The power battery module further includes a surrounding protective sleeve (20), a bottom protective pad (30) and an external protective sleeve (40). The surrounding protective cover (20) comprises two first protective plates (21) and two second protective plates (22), wherein the shape of the first protective plates (21) matches the first side surface of the battery core (10), and the shape of the second protective plates (22) matches the third side surface of the battery core (10); each of the first protective plates (21) and the second protective plates (22) are connected in an integrally formed plastic, so that the surrounding protective cover (20) is sleeved and surrounds each of the first side surface and the third side surface of the battery core (10); The bottom protection pad (30) has a shape matching the second side surface of the battery core (10) and is arranged on the second side surface of the bottom of the battery core (10); The outer protective sleeve (40) is a heat shrinkable sleeve, which is sleeved outside the surrounding protective sleeve (20) and wraps the bottom protective pad (30) and the second side surface of the top of the battery core (10).

2. A power battery module with protection function according to claim 1, characterized in that: Each of the first protective plates (21) and each of the second protective plates (22) is respectively hollowed out and provided with array holes (23).

3. The power battery module with protection function according to claim 1, characterized in that: The power battery module also includes a corner protection pad (50), which is fixedly arranged outside the external protection sleeve (40) and arranged on the corner of the battery core (10).

4. The power battery module with protection function according to claim 3, characterized in that: Eight corner protection pads (50) are provided and are respectively located on eight corners of the battery core (10).

5. The power battery module with protection function according to claim 3, characterized in that: The corner protection pad (50) is provided with three mutually perpendicular extension ends.

6. The power battery module with protection function according to claim 5, characterized in that: The corner protection pad (50) is made of plastic material.

7. The power battery module with protection function according to claim 1, characterized in that: The bottom protection pad (30) is made of plastic material.

8. The power battery module with protection function according to claim 1, characterized in that: The conductor is a charging and discharging conductor (60).

9. The power battery module with protection function according to claim 1, characterized in that: The conductors include a charging and discharging conductor (60) and a balancing charging conductor (70).

10. The power battery module with protection function according to claim 1, characterized in that: The battery core (10) is formed by electrically connecting at least two battery cells.

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