Internal structure of battery pack

Abstract

The utility model discloses an internal structure of a battery pack, which comprises a battery cell, a BMS (Battery Management System) protection plate and a shell, the battery cell and the BMS protection plate are both positioned in the shell, the BMS protection plate is connected in series on a charging and discharging circuit of the battery cell, a front cover is arranged on the front side of the shell, the BMS protection plate is arranged on the inner side of the front cover and positioned between the front cover and the battery cell, and the battery cell is arranged in the shell. The convex height h of the BMS protection plate is smaller than the distance D between the battery cell and the front cover; a supporting piece is further arranged between the front cover and the battery cell, the supporting piece is connected with the front cover or the battery cell, and the top face height H of the supporting piece is larger than the outward protruding height h of the BMS protection plate; according to the battery pack, the special supporting structure is arranged in the battery pack, so that the battery cell cannot be in contact with the BMS protection plate when the battery pack topples over, the height of the supporting structure is greater than that of the BMS protection plate, a safe space is formed in the battery pack, and the battery cell can be effectively prevented from crushing the BMS protection plate, the wiring harness and other parts; the device has the advantages of simple structure, high reliability and low cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely is an internal structure of battery pack. BACKGROUND

[0002] The battery pack is mainly composed of the battery cell, the BMS protection board and the shell, and the battery cell and the BMS protection board are located inside the shell. In the prior art, the BMS protection board inside the battery pack does not have a special protection structure. When the portable energy storage power supply is moved or tilted, the battery cell is easy to crush the BMS protection board or the wire harness, causing the entire battery pack to be damaged and invalid. Therefore, the existing battery pack does not have a protection structure specially arranged inside to protect the BMS protection board, which makes it not suitable for application in the portable energy storage power supply. SUMMARY

[0003] The utility model aims at providing an internal structure of battery pack, which aims at solving the problem that the existing battery pack does not have a protection structure specially arranged inside to protect the BMS protection board, which makes it not suitable for application in the portable energy storage power supply.

[0004] The utility model is realized in this way:

[0005] An internal structure of battery pack, including battery cell, BMS protection board and shell, the battery cell and BMS protection board are located in the shell, the BMS protection board is connected in series on the charge-discharge circuit of battery cell, the front side of shell is provided with front cover, the BMS protection board is arranged in the inner side of front cover, and is located between front cover and battery cell, the outer convex height h of BMS protection board is less than the distance D between battery cell and front cover, the support piece is further arranged between front cover and battery cell, the support piece is connected with front cover or battery cell, and the top surface height H of support piece is greater than the outer convex height h of BMS protection board.

[0006] Further, the top surface height H of the support piece is the distance between the inner side of the front cover or the battery cell, and the bottom surface of the support piece is attached to the inner side of the front cover or the battery cell.

[0007] Further, the BMS protection board is provided with a cooling fin, the cooling fin is attached to the inner side of the front cover, and the bottom surface of the support piece is attached to the cooling fin.

[0008] Further, the support piece is provided with a connecting hole, the front cover or the battery cell is provided with a screw, the screw passes through the connecting hole and is connected with a nut, so as to connect the support piece to the front cover or the battery cell.

[0009] Further, the support piece is a U-shaped bracket structure, the top of the U-shaped bracket is provided with a top surface having a supporting effect for supporting the battery cell or the front cover, the mouth of the U-shaped bracket is provided with a bottom surface, and the connecting hole is arranged on the bottom surface.

[0010] Further, the support is a columnar structure, a top of the columnar structure is provided with a top surface with a supporting effect for supporting the battery cell or the front cover, and a bottom of the columnar structure is provided with a bottom surface, and the bottom surface is provided with a connecting hole.

[0011] Further, the top of the shell further comprises a top cover, an inside of the top cover is provided with a fire extinguishing device, the fire extinguishing device is provided with a temperature probe, and the fire extinguishing device is automatically started to extinguish fire when detecting that the temperature inside the battery pack is too high.

[0012] Further, the front cover is provided with a positive and negative electrode interface, a communication interface and a balance valve, and both sides of the shell are provided with a handle.

[0013] Further, the front cover is made of a metal plate, the shell is made of an epoxy plate, and the support is made of a metal plate, plastic or rubber.

[0014] Compared with the prior art, the battery pack has the advantages that:

[0015] 1. The special support structure arranged in the battery pack ensures that the battery cell does not contact the BMS protection plate when the battery pack is tilted, the height of the support structure is greater than the height of the BMS protection plate, a safety space is formed in the battery pack, the battery cell can effectively prevent the BMS protection plate and the wiring harness from being damaged, and the battery pack has the obvious advantages of simple structure, high reliability and low cost.

[0016] 2. The top of the shell further comprises a top cover, an inside of the top cover is provided with a fire extinguishing device, the fire extinguishing device is provided with a temperature probe, and the fire extinguishing device is automatically started to extinguish fire when detecting that the temperature inside the battery pack is too high, and the use is safer. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of a three-dimensional structure of the utility model;

[0018] Figure 2 is an exploded view of the utility model;

[0019] Figure 3 is a front view of the utility model;

[0020] Figure 4 is Figure 3 a sectional view in direction A-A in figure 1;

[0021] Figure 5 is Figure 3 a sectional view in direction B-B in figure 1;

[0022] Figure 6 is Figure 5 an enlarged view of region C in figure 1;

[0023] Figure 7 is another structure of the support, Figure 5 is an enlarged view of the C region in the middle;

[0024] Figure 8 is a structure diagram of the support of the utility model.

[0025] In the figure: 1, the electric core; 2, BMS protection board; 3, the shell; 4, the front cover; 5, the support; 6, the cooling fin; 7, the connecting hole; 8, the screw; 9, the nut; 10, the top surface; 11, the bottom surface; 12, the top cover; 13, the fire extinguishing device; 14, the positive and negative pole interface; 15, the communication interface; 16, the balance valve; 17, the handle. DETAILED DESCRIPTION

[0026] In the utility model, unless another explicit provision and limitation, the terms "installation", "connection", "connection", "fixing" and other terms should be broad sense understanding, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or the interaction of two elements inside two elements. For ordinary skilled in the art, the above terms can be understood according to the specific meaning of the utility model.

[0027] The following will be further described in combination with the specific embodiments and the drawings:

[0028] As Figures 1-7 shown, the internal structure of a battery pack includes electric core 1, BMS protection board 2 and shell 3, the shell 3 is made of epoxy board, the electric core 1 and BMS protection board 2 are located in the shell 3, and the BMS protection board 2 is connected in series on the charge-discharge circuit of the electric core 1. The front side of the shell 3 is provided with the front cover 4, the front cover 4 is provided with the positive and negative pole interface 14, the communication interface 15 and the balance valve 16, and the shell 3 is provided with the handle 17 on both sides, which is convenient for moving the battery pack. The BMS protection board 2 is arranged on the inner side of the front cover 4 and is located between the front cover 4 and the electric core 1, and the outer convex height h of the BMS protection board 2 is less than the distance D between the electric core 1 and the front cover 4, so that the BMS protection board 2 can be placed between the electric core 1 and the front cover 4 without being extruded. The support 5 is further arranged between the front cover 4 and the electric core 1, the support 5 is connected with the front cover 4 or the electric core 1, the top surface height H of the support 5 is the distance between the support 5 and the inner side of the front cover 4 or the electric core 1, and the bottom surface 11 of the support 5 is attached to the inner side of the front cover 4 or the electric core 1. The top surface height H of the support 5 is greater than the outer convex height h of the BMS protection board 2, so when the portable energy storage power supply is moved or poured, the electric core 1 will not extrude the BMS protection board 2 due to the arrangement of the support 5, so the BMS protection board 2 can be effectively protected.

[0029] The relative height of the support 5 and the BMS protection plate 2 is very critical, only when the height H of the support 5 is greater than the height h of the BMS protection plate 2, the support 5 can support and protect the BMS protection plate 2 before the battery cell 1 contacts the BMS protection plate 2, so as to avoid the BMS protection plate 2 being damaged by the battery cell 1.

[0030] As shown in Figure 5 , Figure 6 and Figure 7 , the BMS protection plate 2 is provided with a cooling fin 6, the cooling fin 6 is attached to the inner side of the front cover 4, and the bottom surface of the support 5 is attached to the cooling fin 6. The front cover 4 is made of a metal plate material, and has good heat transfer effect, and the cooling fin 6 transfers the heat generated by the BMS protection plate 2 during work to the front cover 4, and then the front cover 4 transfers the heat to the air outside.

[0031] As shown in Figure 3 , Figure 5 , Figure 6 and Figure 8 , the support 5 is a U-shaped bracket structure, and the U-shaped bracket is made of a metal plate material, plastic or rubber. The top of the U-shaped bracket is provided with a top surface 10 having a supporting effect, for supporting the battery cell 1 or the front cover 4, and the mouth of the U-shaped bracket is provided with a bottom surface 11, and the bottom surface 11 is provided with a connecting hole 7 for mounting with the front cover 4, the cooling fin 6 or the battery cell 1. The front cover 4 or the battery cell 1 is provided with a screw 8, the root of the screw 8 is connected with the front cover 4 or the battery cell 1 through a press-in or welding process, the screw 8 penetrates through the connecting hole 7 and is connected with a nut 9, so as to connect the support 5 to the front cover 4 or the battery cell 1.

[0032] As shown in Figure 7 , the support 5 is a columnar structure, and the support 5 is made of a metal plate material, plastic or rubber. The top of the columnar structure is provided with a top surface 10 having a supporting effect, for supporting the battery cell 1 or the front cover 4, and the bottom of the columnar structure is provided with a bottom surface, and the bottom surface is provided with a connecting hole 7 for mounting with the front cover 4, the cooling fin 6 or the battery cell 1.

[0033] It should be noted that the preferred scheme of the utility model is that the support 5 is connected with the front cover 4 or the cooling fin 6 of the BMS protection plate 2, but as an alternative scheme, the support 5 can also be directly connected with the battery cell 1 or indirectly connected with the battery cell 1 through an end plate or the like on the battery cell 1, which can also play the same role of protecting the BMS protection plate 2, at this time the bottom surface 11 of the support 5 is connected with the battery cell 1 or the end plate, and the top surface 10 is used to support the front cover 4.

[0034] As shown in Figure 2 , the top of the shell 3 further comprises a top cover 12, and the inner side of the top cover 12 is provided with a fire extinguishing device 13, and the fire extinguishing device 13 is provided with a temperature probe, and when the temperature inside the battery pack is too high, the fire extinguishing device 13 is automatically started to extinguish the fire.

[0035] In summary, the utility model discloses a special support structure is arranged in the battery pack, ensure that when the battery pack is upset, and the cell 1 does not contact BMS protection board 2, support structure height is greater than the height of BMS protection board 2, form safety space in the battery pack, can effectively prevent cell 1 and press BMS protection board 2 and wire harness and other components, with simple structure, high reliability and low cost The obvious advantage, very suitable for application in various portable energy storage power supply products, has obvious technical advantage.

[0036] The above is only preferred embodiment of the utility model, and does not limit the utility model, and for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An internal structure of a battery pack, comprising a battery cell, a BMS protection board and a shell, the battery cell and the BMS protection board are located in the shell, the BMS protection board is connected in series on the charge-discharge circuit of the battery cell, characterized in that, The front side of the shell is provided with a front cover, the BMS protection plate is arranged inside the front cover and between the front cover and the battery cell, the outer convex height h of the BMS protection plate is less than the distance D between the battery cell and the front cover; a support is further arranged between the front cover and the battery cell, the support is connected with the front cover or the battery cell, and the top surface height H of the support is greater than the outer convex height h of the BMS protection plate.

2. The internal structure of a battery pack according to claim 1, wherein The top surface height H of the support is the distance between the support and the inner side surface of the front cover or the battery cell, and the bottom surface of the support is attached to the inner side surface of the front cover or the battery cell.

3. The internal structure of a battery pack according to claim 1, wherein The BMS protection plate is provided with a cooling fin, the cooling fin is attached to the inner side surface of the front cover, and the bottom surface of the support is attached to the cooling fin.

4. The internal structure of a battery pack according to claim 1, wherein The support is provided with a connecting hole, the front cover or the battery cell is provided with a screw, the screw is connected with a nut through the connecting hole, so as to connect the support to the front cover or the battery cell.

5. The internal structure of a battery pack according to claim 1, wherein The support is a U-shaped bracket structure, the top of the U-shaped bracket is provided with a top surface with a supporting function for supporting the battery cell or the front cover, and the mouth of the U-shaped bracket is provided with a bottom surface provided with a connecting hole.

6. The internal structure of a battery pack according to claim 1, wherein The support is a columnar structure, the top of the columnar structure is provided with a top surface with a supporting function for supporting the battery cell or the front cover, and the bottom of the columnar structure is provided with a bottom surface provided with a connecting hole.

7. The internal structure of a battery pack according to claim 1, wherein The top of the shell further comprises a top cover, the inside of the top cover is provided with a fire extinguishing device, the fire extinguishing device is provided with a temperature probe, and when the internal temperature of the battery pack is detected to be too high, the fire extinguishing device is automatically started to extinguish the fire.

8. The internal structure of a battery pack according to claim 1, wherein The front cover is provided with positive and negative electrode interfaces, a communication interface and a balance valve, and the shell is provided with handles on both sides.

9. The internal structure of a battery pack according to claim 1, wherein The front cover is made of a metal plate, the shell is made of an epoxy plate, and the support is made of a metal plate, plastic or rubber.

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