High-safety lithium battery pack with multiple safety protection measures

Abstract

The utility model relates to the field of lithium ion batteries, in particular to a high-safety lithium battery pack with multiple safety protection measures. A battery pack is arranged in the battery pack stainless steel box, the battery pack comprises a battery cell, a flame-retardant bracket and a circuit board, the battery cell is arranged in the flame-retardant bracket, the flame-retardant bracket is provided with an upper-layer groove and a lower-layer groove which correspond to each other up and down, and the battery cell is clamped and fixed through the upper-layer groove and the lower-layer groove; a circuit board is arranged above the upper-layer groove of the flame-retardant bracket; and the circuit board is connected with the pole of the battery cell through a matched bolt and a matched nut. Through structural design and material selection, thermal stability and electrochemical stability are improved, potential safety hazards such as over-charge, over-discharge, short circuit and thermal runaway are effectively prevented, internal circuits of the lithium battery pack are simplified, potential safety hazards of the lithium battery pack are remarkably reduced, and compared with a lithium battery pack of the same specification, the lithium battery pack is small in size and light in weight.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lithium ion battery, in particular to a high safety lithium battery pack with multiple safety protection measures. BACKGROUND

[0002] Lithium battery is a kind of battery with lithium metal or lithium alloy as positive / negative electrode material, using non-aqueous electrolyte solution, due to the chemical properties of lithium metal is very active, the processing, preservation, use of lithium metal, the requirement to environment is very high. With the popularity of portable electronic equipment and electric vehicles, the demand for high-performance, high-safety lithium battery pack is increasing. Although the existing lithium battery pack has made progress in energy density and cycle life, there are still deficiencies in safety, such as overheating, short circuit and overcharge, which may cause safety accidents. SUMMARY

[0003] The utility model aims at providing a high safety lithium battery pack with multiple safety protection measures, which can improve the safety of the battery pack and reduce the explosion of the battery pack.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0005] A high safety lithium battery pack with multiple safety protection measures, comprising a battery pack stainless steel box and a battery pack arranged in the battery pack stainless steel box, the battery pack comprising a battery cell, a fire-retardant support and a circuit board, the battery cell being arranged in the fire-retardant support, the fire-retardant support being provided with an upper groove and a lower groove corresponding to each other, and the battery cell being clamped and fixed through the upper groove and the lower groove; the circuit board is arranged above the upper groove of the fire-retardant support, and the pole of the battery cell is connected with the circuit board through a matched bolt and nut.

[0006] The high safety lithium battery pack with multiple safety protection measures, the lower end of the battery cell is inserted into the lower groove of the fire-retardant support, the upper groove is buckled on the upper end of the battery cell, the battery cells are arranged in a row in series and the poles are upward, and the upper end of the pole is connected and fixed with the circuit board through the upper groove.

[0007] The high safety lithium battery pack with multiple safety protection measures, the battery pack stainless steel box serves as an external protective layer and a buffer layer.

[0008] The high safety lithium battery pack with multiple safety protection measures, the circuit board is a PCB circuit board.

[0009] The high safety lithium battery pack with multiple safety protection measures, each battery cell is equipped with a safety valve.

[0010] The high safety lithium battery pack with multiple safety protection measures, a handle and a charging and discharging triangle head are installed on the top of the battery pack stainless steel box.

[0011] The high-safety lithium battery pack with multiple safety protection measures is pasted with EVA bubble cotton as a buffer layer around the battery pack.

[0012] The high-safety lithium battery pack with multiple safety protection measures is pasted with EVA bubble cotton as a buffer layer around the battery pack.

[0013] The high-safety lithium battery pack with multiple safety protection measures is pasted with EVA bubble cotton as a buffer layer around the battery pack.

[0014] The high-safety lithium battery pack with multiple safety protection measures is pasted with EVA bubble cotton as a buffer layer around the battery pack.

[0015] 1、 The utility model has the advantages and beneficial effects that relative to prior art:

[0016] 2、 The utility model uses lithium iron phosphate automobile-grade battery cells, which not only improves the safety of the battery pack but also has a long cycle life and saves use cost.

[0017] 3、 The utility model uses a PCB (printed circuit board), which can realize solderless wiring, simplifies the internal circuit of the lithium battery pack and improves production efficiency.

[0018] 4、 The utility model can have an intelligent management system, which can remotely monitor the state and geographical position of the battery cells in real time, including voltage, current, temperature and other parameters, and automatically take measures in abnormal conditions, such as cutting off the circuit or starting the heating system, and also has an anti-theft function. DRAWINGS

[0019] Figure 1 It is a structure schematic view of the stainless steel box of the utility model.

[0020] Figure 2 It is a structure schematic view of the battery pack of the utility model.

[0021] Figure 3 It is a right side schematic view of the utility model. Figure 2

[0022] Figure 4 It is a front view schematic view of the utility model. Figure 2

[0023] ​​In the figure: 1 handle, 2 charge-discharge delta head, 3 battery cell (31 pole), 4 fire-retardant support (41 upper groove, 42 lower groove), 5 circuit board, 6 protection plate, 7 battery pack stainless steel box. DETAILED DESCRIPTION

[0024] In order to better understand the purpose, structure and function of the utility model, the utility model will be described in further detail below with reference to the drawings.

[0025] As Figures 1-4 shown, the utility model provides a high safety lithium battery pack with multiple safety protection measures, mainly includes battery pack stainless steel box 7 and the battery pack combined by battery cell 3, fire-retardant support 4, circuit board 5 and protection plate 6 in battery pack stainless steel box 7, several battery cells 3 are arranged in fire-retardant support 4, fire-retardant support 4 is equipped with upper groove 41 and lower groove 42 corresponding to upper and lower, and battery cell 3 is clamped and fixed through upper groove 41 and lower groove 42, the upper groove 41 of fire-retardant support 4 is equipped with circuit board 5, and the pole 31 of battery cell 3 is connected through matched bolt and nut, and the protection plate 6 is installed on one side of fire-retardant support 4, and the upper groove 41 and lower groove 42 of fire-retardant support 4 are respectively fixedly connected with protection plate 6 through bolt, and the bolt adopts anti-loose and anti-skid nylon self-locking nut locking.

[0026] Battery pack stainless steel box 7 is used as external protection layer and buffer layer to reduce external impact.

[0027] The lower end of battery cell 3 is inserted into the lower groove 42 of fire-retardant support 4, the upper groove 41 is buckled on the upper end of battery cell 3, several battery cells 3 are arranged in series and the pole 31 is upward, the upper end of pole 31 is connected and fixed with circuit board 5 through upper groove 41, and the circuit board 5 can adopt PCB circuit board.

[0028] In use, first, install circuit board 5 above the upper groove 41 of fire-retardant support 4, and connect and fix circuit board 5 with battery cell 3 through matched bolt and nut, then connect protection plate 6 wire, charge-discharge delta head 2 wire and battery pack positive and negative electrode wire, and paste ethylene-vinyl acetate copolymer (EVA) foam on the periphery of battery pack.

[0029] The battery cell uses new type non-flammable electrolyte, improves the thermal stability and electrochemical stability of the battery, and reduces the risk of thermal runaway.

[0030] Since the battery pack adopts the matched bolt and nut fixing design, it is convenient to maintain and replace, and meanwhile the influence of single cell failure on the whole battery pack is reduced.

[0031] In addition, the protection plate 6 can have an intelligent management system, which can monitor the cell state and geographical position in real time, including voltage, current, temperature and other parameters, and automatically take measures such as cutting off the circuit or starting the heating system in abnormal conditions, and also has an anti-theft function.

[0032] The implementation results show that the battery pack improves the thermal stability and electrochemical stability through the structural design and material selection, effectively prevents the safety hazards such as overcharge, overdischarge, short circuit and thermal runaway, simplifies the internal circuit of the lithium battery pack, significantly reduces the safety hazards of the lithium battery pack, and compared with the lithium battery pack of the same specification, the size is smaller and the weight is lighter.

[0033] The above, the utility model is through some embodiment describes, the person skilled in the art knows, can carry out various changes or equivalent replacement to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A high safety lithium battery pack with multiple safety protection measures, characterized in that, The battery stainless steel box and the battery set arranged in the battery stainless steel box are included, the battery set includes battery cell, fire-retardant support and circuit board, the battery cell is arranged in the fire-retardant support, the fire-retardant support is provided with upper and lower corresponding upper groove and lower groove, and the battery cell is clamped and fixed through the upper groove and the lower groove; the upper groove of the fire-retardant support is provided with the circuit board above, and the circuit board and the pole of the battery cell are connected through matched bolt and nut.

2. The high safety lithium battery pack with multiple safety protection measures according to claim 1, characterized in that, The lower end of the battery cell is inserted into the lower groove of the fire-retardant support, the upper groove is buckled on the upper end of the battery cell, the battery cells are arranged in a row in series and the poles are upward, and the upper end of the pole is connected and fixed with the circuit board through the upper groove.

3. The high safety lithium battery pack with multiple safety protection measures according to claim 1, characterized in that, The battery stainless steel box serves as an external protection layer and a buffer layer.

4. The high safety lithium battery pack with multiple safety protection measures according to claim 1, characterized in that, The circuit board adopts a PCB circuit board.

5. The high safety lithium battery pack with multiple safety protection measures according to claim 1, characterized in that, Each battery cell is provided with a safety valve.

6. The high safety lithium battery pack with multiple safety protection measures according to claim 1, characterized in that, A handle and a charging and discharging triangle head are mounted on the top of the battery stainless steel box.

7. The high safety lithium battery pack with multiple safety protection measures according to claim 1, characterized in that, EVA foam is pasted around the battery set as a buffer layer.

8. The high safety lithium battery pack with multiple safety protection measures according to claim 1, characterized in that, A protection plate is mounted on one side of the fire-retardant support, the upper groove and the lower groove of the fire-retardant support are respectively fixedly connected with the protection plate through bolts, and the bolts adopt anti-loose and anti-slip nylon self-locking nuts for locking.

9. The high safety lithium battery pack with multiple safety protection measures according to claim 8, characterized in that, The protection plate has an intelligent management system, which can remotely monitor the state and geographical position of the battery cell in real time.

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