Novel explosion-proof lithium battery pack

Abstract

The utility model discloses a novel explosion-proof lithium battery pack, and relates to the technical field of lithium batteries. The novel explosion-proof lithium battery pack comprises a protective shell, a pressure release valve, a supporting and buffering assembly, lithium batteries and a protective cover, a plurality of lithium batteries are installed in the protective shell, different lithium batteries are connected in series through series connection pieces to form the lithium battery pack, the pressure release valve is nested in the side end of the protective shell, and the supporting and buffering assembly is installed on the inner side face of the protective shell. Explosion-proof plates are arranged between adjacent lithium batteries at intervals, the two sides of each explosion-proof plate are coated with explosion-proof coatings, and the area of each explosion-proof plate accounts for 60%-80% of the side area of the corresponding lithium battery. The lithium battery pack provided by the utility model is externally protected by the protective shell, and the explosion-proof plates are arranged on the side surfaces of the adjacent lithium batteries in a large area, so that direct mutual influence between the lithium batteries during detonation can be avoided, the overall explosion-proof effect of the lithium battery pack is improved to a certain extent, and the overall structure plays a role in internal and external dual protection.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field more particularly is related to a new -type explosion -proof lithium battery group. BACKGROUND

[0002] Lithium battery is a kind of by lithium metal or lithium alloy as positive / negative electrode material, using non-aqueous electrolyte solution battery, in the use process of electric vehicle, lithium battery group is its core component, provides energy source for it to drive;Nowadays, there are sightseeing electric vehicles powered by lithium battery group in tourist attractions, the safety of lithium battery group is particularly important.Based on this, the inventor studies and proposes the case. CONTENT OF UTILITY MODEL

[0003] The utility model is to solve the above-mentioned technical problem, the utility model provides a new -type explosion -proof lithium battery group.

[0004] The utility model discloses a kind of new -type explosion -proof lithium battery groups to achieve the above-mentioned purposes specifically using the following technical solutions:

[0005] A kind of new -type explosion -proof lithium battery group, including protective shell, pressure relief valve, support buffer assembly, lithium battery, protective cover, several lithium batteries are installed in protective shell, different lithium batteries are connected by series connection piece and form lithium battery group, pressure relief valve is nested at the side end of protective shell, support buffer assembly is installed on the inner side of protective shell, explosion-proof plate is arranged at interval between adjacent lithium batteries, explosion-proof plate is coated with explosion-proof coating on both sides, the area of explosion-proof plate occupies 60%-80% of lithium battery side area.

[0006] Large area is set in the explosion-proof plate of adjacent lithium battery side, can reduce the risk of direct mutual influence between lithium battery when deflagration, improve the explosion-proof effect of lithium battery group as a whole to some extent;Again superimposed high-strength protective shell attribute, play the effect of internal and external double protection.

[0007] A preferred technical solution: support buffer assembly includes base, hinge rod, roller, buffer block, hinge connection has hinge rod on base, roller is rotatably installed on hinge rod, buffer block is installed on the inner side of roller, buffer block is pasted and installed on base.

[0008] A preferred technical solution: the inner side of protective shell is provided with the notch matched with base.

[0009] A preferred technical solution: two hinge rods are symmetrically installed on one base.

[0010] A preferred technical solution: the top surface of series connection piece is attached to set heat insulation sealing plate.

[0011] A preferred technical solution: the side end of protective cover is set as ladder mouth, protective cover is slidably installed in protective shell, heat insulation sealing plate blocks the connecting gap between protective cover and protective shell.

[0012] A preferred technical solution: the bottom end of the series connection piece is provided with a plurality of positioning holes, and the lithium battery is connected with the series connection piece through the positioning holes.

[0013] A preferred technical solution: the bottom end of the lithium battery is provided with a buffer plate.

[0014] The beneficial effects of the utility model are as follows:

[0015] In the utility model, the lithium battery group is externally protected by the protective shell, the explosion-proof plates are arranged on the side surfaces of the adjacent lithium batteries in a large area, direct mutual influence between the lithium batteries during explosion and combustion is avoided, the overall explosion-proof effect of the lithium battery group is improved to a certain extent, and the overall structure has the effect of double protection from inside and outside. DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model; Figure 1 It is a local enlarged view of position A in the utility model;

[0018] Figure 3 It is a local enlarged view of position B in the utility model; Figure 1 It is a local enlarged view of position B in the utility model;

[0019] Figure 4 It is a local enlarged view of position C in the utility model. Figure 1 It is a local enlarged view of position C in the utility model.

[0020] Reference signs: 1, protective shell; 2, pressure relief valve; 21, valve shell; 22, limiting seat; 23, plug ball; 24, spring; 25, hole plate; 3, supporting and buffering assembly; 31, base; 32, hinge rod; 33, roller; 34, buffer block; 4, lithium battery; 5, protective cover; 6, series connection piece; 7, explosion-proof plate; 71, explosion-proof coating; 8, buffer plate; 9, heat insulation and sealing plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0023] As shown in Figures 1 to 4 The present embodiment provides a new explosion-proof lithium battery pack, which comprises a protective shell 1, a pressure relief valve 2, a supporting and buffering assembly 3, a lithium battery 4, and a protective cover 5. A plurality of lithium batteries 4 are installed in the protective shell 1, and different lithium batteries 4 are connected in series by a series connection piece 6 to form a lithium battery pack. The pressure relief valve 2 is nested at the side end of the protective shell 1, and the supporting and buffering assembly 3 is installed on the inner side surface of the protective shell 1. An explosion-proof plate 7 is arranged between adjacent lithium batteries 4. The explosion-proof plate 7 can be a plate body composed of glass fiber and resin matrix, or other plate bodies. An explosion-proof coating 71 is coated on both sides of the explosion-proof plate 7. The area of the explosion-proof plate 7 accounts for 60%-80% (e.g., 60%, 70%, 80%) of the side area of the lithium battery 4. Based on the application cost and use effect, the lithium battery 4 is taken as an example of a flat rectangular structure, and the explosion-proof plate 7 is correspondingly arranged as a rectangle and installed in the center area of the side end of the lithium battery 4. The area of the explosion-proof plate 7 accounts for 60% of the side area of the lithium battery 4, which is the preferred value. The explosion-proof coating is an elastic substance generated by the reaction of isocyanate component and amino compound component. It has strong tensile strength, flexibility, good wear resistance, and strong adhesion.

[0024] Further, the supporting and buffering assembly 3 comprises a base 31, a hinge rod 32, a roller 33, and a buffering block 34. The hinge rod 32 is hingedly connected to the base 31, and the roller 33 is rotatably installed on the hinge rod 32. The buffering block 34 is installed on the inner side of the roller 33 and is pasted on the base 31.

[0025] Further, the inner side surface of the protective shell 1 is provided with a slot matching the base 31.

[0026] Further, two hinge rods 32 are symmetrically installed on one base 31.

[0027] Further, a heat insulation sealing plate 9 is attached to the top surface of the series connection piece 6. The heat insulation sealing plate 9 is made of high-temperature and high-pressure resistant resin, glass fiber alkali-free cloth, and composite reinforced material through mold lamination.

[0028] Further, the side end of the protective cover 5 is provided with a stepped opening, and the protective cover 5 is slidingly installed in the protective shell 1. The heat insulation sealing plate 9 seals the connection gap between the protective cover 5 and the protective shell 1, which is beneficial to improve the sealing effect of the lithium battery pack.

[0029] Further, the bottom end of the series connection piece 6 is provided with a plurality of positioning holes, and the lithium battery 4 is connected with the series connection piece 6 through the positioning holes.

[0030] Further, the bottom end of the lithium battery 4 is provided with a buffer plate 8 made of polyethylene rubber.

[0031] In use, the support and buffer assembly 3 assists the lithium battery 4 to be installed into the protective shell 1, and the lithium battery 4 is placed into the protective shell 1 through the rollers 33, and the lateral buffer is achieved by the articulated hinge rod 32 and the buffer block 34. The lithium battery 4 on the outside is spaced from the protective shell 1 to form a buffer space, so as to reduce the risk of internal damage of the lithium battery pack / lithium battery 4 in the carrying process. When the lithium battery 4 is internally exploded due to an accident, there is enough storage space at the pressure relief valve 2. The pressure relief valve 2 comprises a valve shell 21, a limiting seat 22, a blocking ball 23, a spring 24 and a hole plate 25. When the internal pressure of the lithium battery pack is too large, the blocking ball 23 is pressed to compress the spring 24, a gap is formed between the blocking ball 23 and the limiting seat 22, and then the valve body is in an open state. Conversely, when the blocking ball 23 is not stressed, the spring 24 resets the blocking ball 23, so that the valve body is in a closed state.

Claims

1. A new type of explosion-proof lithium battery pack, characterized in that, The application relates to a lithium battery protection device, which comprises a protective shell, a pressure relief valve, a supporting and buffering assembly, lithium batteries and a protective cover.

2. The new explosion-proof lithium battery pack according to claim 1, characterized in that, The supporting and buffering assembly comprises a base, a hinge rod, a roller and a buffering block.

3. The new explosion-proof lithium battery pack according to claim 2, characterized in that, The inner side of the protective shell is provided with a groove matched with the base.

4. The new type of explosion-proof lithium battery pack according to claim 2, characterized in that, Two hinge rods are symmetrically arranged on the base.

5. The new explosion-proof lithium battery pack according to claim 1, characterized in that, The top surface of the series connecting piece is provided with a heat insulation sealing plate.

6. The new type of explosion-proof lithium battery pack according to claim 5, characterized in that, The side end of the protective cover is provided with a stepped opening.

7. The new explosion-proof lithium battery pack according to claim 1, characterized in that, The lithium battery is connected with the series connecting piece through the positioning hole.

8. The new explosion-proof lithium battery pack according to claim 1, characterized by, The bottom end of the lithium battery is provided with a buffering plate.

Images