Cavity-divided lithium battery

Abstract

The utility model discloses a cavity-divided lithium battery which comprises a lithium battery pack, a first fixing seat is fixedly mounted on the left side of the surface of the lithium battery pack, a second fixing seat is fixedly mounted on the right side of the surface of the lithium battery pack, and meanwhile, a plurality of groups of lithium battery monomers are uniformly mounted in the lithium battery pack; the distances between two adjacent groups of lithium battery monomers are consistent, the surfaces of the lithium battery monomers are covered with top covers, and fuses are mounted on the lithium battery monomers. According to the cavity-separated lithium battery, the lithium battery monomers adopt a separated design, so that other cavities can be prevented from being ignited under the condition that a certain lithium battery monomer is in thermal runaway, and the cavity-separated lithium battery is safer and more reliable; when a certain lithium battery monomer is subjected to thermal runaway, heat can be prevented from being quickly transferred to the adjacent monomer through the arrangement of the isolation plate and the isolation cavity, the chain reaction of thermal runaway is delayed or prevented, and the possibility of large-scale thermal runaway of the whole lithium battery pack is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of lithium battery, concretely is a kind of split cavity formula lithium battery. BACKGROUND

[0002] Lithium battery pack is a battery system composed of multiple lithium battery monomers, and its working principle is based on the embedding and de-embedding of lithium ions between the positive and negative electrodes; during charging, lithium ions are released from the positive lattice, pass through the electrolyte and embed into the negative lattice; during discharging, lithium ions return from the negative electrode to the positive electrode, while electrons flow from the negative electrode to the positive electrode through the external circuit, thereby generating electric current; the charging and discharging process of the lithium battery pack needs to be controlled and managed by a battery management system (BMS) to ensure the safety and stability of the battery; the BMS can monitor parameters such as voltage, current and temperature of the battery, and control the charging and discharging of the battery according to these parameters to avoid overcharging, overdischarging, overcurrent and overheating;

[0003] The lithium battery pack includes multiple lithium battery monomers, and it is difficult to ensure that other battery monomers are not ignited in the case of thermal runaway of the lithium battery monomers, thereby reducing the safety of the lithium battery pack during use. SUMMARY

[0004] The utility model aims at providing a split cavity formula lithium battery to solve the defects mentioned in the background.

[0005] To achieve the above-mentioned purpose, a split cavity formula lithium battery is provided, which includes a lithium battery pack, a first fixing seat is fixedly installed on the left surface of the lithium battery pack, a second fixing seat is fixedly installed on the right surface of the lithium battery pack, multiple groups of lithium battery monomers are uniformly installed inside the lithium battery pack, the distance between adjacent two groups of lithium battery monomers is consistent, a top cover covers the surface of the lithium battery monomer, a fuse is installed on the lithium battery monomer, an isolation cavity is formed on the surface of the lithium battery pack, a plug-in slot is formed on one side of the isolation cavity, the size of the plug-in slot is matched with that of the isolation plate, and the isolation plate is plugged into the plug-in slot.

[0006] Preferably, the first fixing seat and the second fixing seat are both "L"-shaped structures made of metal material, and a circular mounting hole is formed on the first fixing seat and the second fixing seat.

[0007] Preferably, an isolation structure is arranged between the lithium battery monomers, and the isolation structure includes a plug-in slot, an isolation plate and an isolation cavity.

[0008] Preferably, the depth of the plug-in slot is greater than the length of the lithium battery monomer, and the cross section of the plug-in slot is rectangular.

[0009] Preferably, positioning grooves are arranged on both sides of the insertion groove, positioning seats are fixedly arranged on both sides of the isolation plate, the positioning seats are matched with the positioning grooves in size, and the two groups of positioning seats are inserted into the two groups of positioning grooves respectively.

[0010] Preferably, the side area of the isolation plate is larger than that of the lithium battery monomer, the isolation plate is made of a polyethylene material and has a cuboid structure, and a stress groove is arranged on the top of the isolation plate.

[0011] Compared with the prior art, the lithium battery monomer is designed in a separation type, so that other cavities are not ignited in the case of thermal runaway of a certain lithium battery monomer, and safety and reliability are improved; when a certain lithium battery monomer is in thermal runaway, the isolation plate and the isolation cavity can prevent heat from being rapidly transmitted to adjacent monomers, delay or prevent the chain reaction of thermal runaway, reduce the possibility of large-scale thermal runaway of the entire lithium battery pack, and thus reduce the probability of occurrence of serious safety accidents such as fire and explosion; the isolation cavity can physically separate the lithium battery monomers, and reduce the risk of large-area diffusion of internal short circuits in the battery pack caused by lithium battery monomer failure. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front view of the structure of the utility model;

[0013] Figure 2 It is a bottom view of Figure 1 ;

[0014] Figure 3 It is a rear view of Figure 1 ;

[0015] Figure 4 It is a top view of the lithium battery pack.

[0016] Marked numbers in the figure: 1, lithium battery pack; 2, first fixed seat; 21, second fixed seat; 3, lithium battery monomer; 31, top cover; 4, insertion groove; 41, positioning groove; 5, isolation plate; 51, positioning seat; 52, stress groove; 6, isolation cavity. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] Please refer to Figures 1-4The utility model provides a kind of cavity formula lithium battery, including lithium battery pack 1, the surface left side of lithium battery pack 1 is fixedly installed with first fixed seat 2, and the surface right side of lithium battery pack 1 is fixedly installed with second fixed seat 21, while the inside of lithium battery pack 1 evenly installs multiple groups lithium battery monomer 3, and the distance between adjacent two groups lithium battery monomer 3 is consistent, the surface of lithium battery monomer 3 is covered with top cover 31, and fuse is installed on lithium battery monomer 3, while the surface of lithium battery pack 1 is provided with isolation chamber 6, and the side of isolation chamber 6 is provided with insertion slot 4, the size of insertion slot 4 and isolation plate 5 is compatible, and isolation plate 5 is inserted in the inside of insertion slot 4.

[0019] Working principle: when using, the inside of lithium battery pack 1 is evenly provided with multiple groups lithium battery monomer 3, and isolation structure is arranged between lithium battery monomer 3 and lithium battery monomer 3, and the isolation structure includes insertion slot 4, isolation plate 5 and isolation chamber 6; the setting of isolation plate 5 and isolation chamber 6 can isolate lithium battery monomer 3 and lithium battery monomer 3, and lithium battery monomer 3 is designed in a separated manner, so that other cavities can be guaranteed not to be ignited in the case of thermal runaway of a certain lithium battery monomer 3, and it is more safe and reliable; when a certain lithium battery monomer 3 occurs thermal runaway, the setting of isolation plate 5 and isolation chamber 6 can prevent heat from being rapidly transmitted to adjacent monomers, delay or prevent the chain reaction of thermal runaway, reduce the possibility of large-scale thermal runaway of the whole lithium battery pack 1, thereby reducing the probability of occurrence of serious safety accidents such as fire and explosion; isolation chamber 6 can physically separate each lithium battery monomer 3, reduce the risk of large-area spread of internal short circuit caused by lithium battery monomer 3 failure in the battery pack; even if one monomer occurs internal short circuit, it is not easy to affect other normal monomers, avoiding the whole battery pack losing function or causing more serious electrical failure; fuse is installed on lithium battery monomer 3, which can be disconnected under extreme conditions, improving the safety of battery pack in use.

[0020] First fixed seat 2 and second fixed seat 21 are both made of metal material and are in the shape of "L", and a circular mounting hole is formed on first fixed seat 2 and second fixed seat 21.

[0021] As a preferred embodiment, isolation structure is arranged between lithium battery monomer 3 and lithium battery monomer 3, and the isolation structure includes insertion slot 4, isolation plate 5 and isolation chamber 6.

[0022] The depth of insertion slot 4 is greater than the length of lithium battery monomer 3, and the cross section of insertion slot 4 is rectangular.

[0023] As a preferred embodiment, positioning grooves 41 are formed on both sides of insertion slot 4, and positioning seats 51 are fixedly installed on both sides of isolation plate 5, and the size of positioning seats 51 and positioning grooves 41 is compatible, and two groups of positioning seats 51 are respectively inserted into two groups of positioning grooves 41.

[0024] The side area of the isolation plate 5 is greater than the side area of the lithium battery monomer 3, and the isolation plate 5 is a cuboid structure made of polyethylene material, and a stress groove 52 is arranged on the top of the isolation plate 5.

[0025] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A compartmentalized lithium battery, comprising a lithium battery pack (1), characterized in that: The lithium battery pack (1) has a first fixing seat (2) fixedly installed on the left side of its surface and a second fixing seat (21) fixedly installed on the right side of its surface. At the same time, multiple sets of lithium battery cells (3) are evenly installed inside the lithium battery pack (1), and the distance between two adjacent sets of lithium battery cells (3) is consistent. The surface of the lithium battery cell (3) is covered with a top cover (31), and a fuse is installed on the lithium battery cell (3). Meanwhile, an isolation cavity (6) is opened on the surface of the lithium battery pack (1), and a plug-in groove (4) is opened on one side of the isolation cavity (6). The plug-in groove (4) is adapted to the size of the isolation plate (5), and the isolation plate (5) is inserted into the inside of the plug-in groove (4).

2. A compartmentalized lithium battery according to claim 1, characterized in that: The first fixing seat (2) and the second fixing seat (21) are both "L" shaped structures made of metal, and both the first fixing seat (2) and the second fixing seat (21) have circular mounting holes.

3. A compartmentalized lithium battery according to claim 1, characterized in that: An isolation structure is provided between the lithium battery cells (3) and the lithium battery cells (3), the isolation structure including the insertion groove (4), the isolation plate (5) and the isolation cavity (6).

4. A compartmentalized lithium battery according to claim 3, characterized in that: The depth of the insertion slot (4) is greater than the length of the lithium battery cell (3), and the cross-section of the insertion slot (4) is rectangular.

5. A compartmentalized lithium battery according to claim 1, characterized in that: The insertion slot (4) has positioning slots (41) on both sides, and positioning seats (51) are fixedly installed on both sides of the isolation plate (5). The positioning seats (51) are adapted to the size of the positioning slots (41), and the two sets of positioning seats (51) are respectively inserted into the two sets of positioning slots (41).

6. A compartmentalized lithium battery according to claim 5, characterized in that: The side area of ​​the separator (5) is larger than that of the lithium battery cell (3), and the separator (5) is a cuboid structure made of polyethylene material. At the same time, a stress groove (52) is provided on the top of the separator (5).

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