Lithium ion battery module capable of preventing thermal runaway

Abstract

The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery module capable of preventing thermal runaway, which comprises an accommodating bin, a battery and a fixing frame, a cross-shaped partition plate is fixedly connected inside the accommodating bin, a threading hole is arranged on the outer side of the partition plate, a mounting hole is arranged at the top end of the accommodating bin, and the battery is arranged in the mounting hole. According to the battery fixing device, the containing bin, the partition plate, the positioning block, the fixing frame, the connecting plate and the like are arranged, so that the containing bin playing a protection role can be added from the outer part of the battery to protect the battery, and the heat dissipation effect of the battery is improved; thermal runaway caused by internal short circuit of the batteries due to direct collision of the batteries is avoided, the battery modules can be separated one by one by the partition plates, the batteries are prevented from being stacked together, other batteries are prevented from being damaged when a certain battery goes wrong, and the batteries can be tightly fixed in the accommodating bin by the fixing frame.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery module capable of preventing thermal runaway. Background Art

[0002] Currently, both power batteries and energy storage batteries are using lithium-ion batteries on a large scale. The use of lithium-ion batteries poses a mobile safety hazard and is prone to thermal runaway. Thermal runaway refers to a chain reaction phenomenon caused by various inducements. The large amount of heat and harmful gases emitted by thermal runaway can cause the battery to catch fire and explode. The thermal runaway of the battery often starts with the decomposition of the SEI film at the negative electrode of the battery, followed by the decomposition and melting of the diaphragm, causing the negative electrode to react with the electrolyte, followed by decomposition of the positive electrode and the electrolyte, thereby causing a large-scale internal short circuit, causing the electrolyte to burn, and then spreading to other battery cells, causing serious thermal runaway, causing the entire battery pack to spontaneously combust.

[0003] There are many factors that may cause thermal runaway of lithium batteries. For example, when a vehicle touches a foreign object while driving at high speed, the internal diaphragm of the battery may collapse, which may cause a short circuit in the battery and lead to spontaneous combustion. Secondly, the battery may be overheated due to long-term use, causing the SEI film inside the battery to begin to dissolve. Therefore, a lithium-ion battery module that prevents thermal runaway is proposed to address the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a lithium-ion battery module that prevents thermal runaway, so as to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A lithium-ion battery module for preventing thermal runaway comprises a storage bin, a battery and a fixing frame, wherein a cross-shaped partition plate is fixedly connected inside the storage bin, a threading hole is provided on the outer side of the partition plate, a mounting hole is provided at the top of the storage bin 1, a fixing hole penetrating the storage bin is provided at the bottom of the storage bin, heat dissipation grooves communicating with the fixing hole are provided on both sides of the fixing hole, a fan is fixedly connected inside the fixing hole, a thermal pad is provided above the fixing hole, a battery is provided at the top of the thermal pad, a copper plate is provided on the outer side of the battery, a fin is fixedly connected to the outer side of the copper plate, a positioning block for limiting effect is provided inside the storage bin, a heat dissipation plate is provided at the top of the battery, a fixing frame is provided at the top of the heat dissipation plate, a connecting plate is fixedly connected to the bottom of the fixing frame, a circular hole penetrating the connecting plate is provided at the top of the connecting plate, and a fixing bolt passes through the circular hole.

[0007] Preferably, the length of the heat dissipation slot is greater than the length of the thermal pad.

[0008] Preferably, the length and width of the battery are smaller than the length and width of the thermal pad.

[0009] Preferably, the number of the copper plates is four, two in a group, and they are symmetrically arranged on both sides of the battery.

[0010] Preferably, the fixing bolt and the positioning block are threadedly connected.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, by providing a storage compartment, a partition plate, a positioning block, a fixing frame and a connecting plate, etc., a storage compartment for protection can be added from the outside of the battery to protect the battery, so as to prevent the battery from being directly subjected to a collision and causing an internal short circuit of the battery to cause thermal runaway. The partition plate can separate the battery modules one by one to prevent the batteries from being stacked together. When a problem occurs in a battery, other batteries will also be damaged. The fixing frame can fix the battery tightly in the storage compartment;

[0013] 2. In the utility model, the fixing holes, heat dissipation slots and fans are provided to continuously ventilate and dissipate heat inside the battery storage compartment, so that the heat generated by the battery is taken out of the storage compartment through the flowing air;

[0014] 3. In the utility model, the heat dissipation of the battery can be carried out by providing the thermal pad, heat sink, copper plate and fins. The heat of the battery is directly transferred to the thermal pad, heat sink and copper plate. The air flowing in the heat dissipation groove will take away the heat on the thermal pad, and the heat on the copper plate will be transferred to the fins. The fins are in contact with the air and directly transfer the heat to the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 A schematic diagram of the structure at A;

[0017] Figure 3 This is a schematic diagram of the structure of the fixing frame of the utility model.

[0018] In the figure: 1. Storage compartment; 2. Partition plate; 3. Threading hole; 4. Mounting hole; 5. Fixing hole; 6. Heat dissipation slot; 7. Fan; 8. Thermal pad; 9. Battery; 10. Heat sink; 11. Copper plate; 12. Fin; 13. Positioning block; 14. Fixing frame; 15. Connecting plate; 16. Round hole; 17. Fixing bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0022] See also Figure 1-3 , the utility model provides a technical solution:

[0023] A lithium-ion battery module for preventing thermal runaway comprises a accommodating chamber 1, a battery 9 and a fixing frame 14, wherein a cross-shaped partition plate 2 is fixedly connected inside the accommodating chamber 1, a threading hole 3 is provided on the outer side of the partition plate 2, a mounting hole 4 is provided on the top of the accommodating chamber 1, a fixing hole 5 penetrating the accommodating chamber 1 is provided on the bottom end inside the accommodating chamber 1, heat dissipation grooves 6 connected to the fixing hole 5 are provided on both sides of the fixing hole 5, a fan 7 is fixedly connected inside the fixing hole 5, a thermal pad 8 is provided above the fixing hole 5, a battery 9 is provided on the top of the thermal pad 8, a copper plate 11 is provided on the outer side of the battery 9, a fin 12 is fixedly connected to the outer side of the copper plate 11, a positioning block 13 for limiting effect is provided inside the accommodating chamber 1, a heat dissipation plate 10 is provided on the top of the battery 9, a fixing frame 14 is provided on the top of the heat dissipation plate 10, a connecting plate 15 is fixedly connected to the bottom end of the fixing frame 14, a circular hole 16 penetrating the connecting plate 15 is provided on the top of the connecting plate 15, and a fixing bolt 17 passes through the circular hole 16.

[0024] The length of the heat dissipation slot 6 is greater than that of the thermal pad 8; the length and width of the battery 9 are less than those of the thermal pad 8; there are four copper plates 11, two in a group, symmetrically arranged on both sides of the battery 9; the fixing bolt 17 and the positioning block 13 are threadedly connected.

[0025] Working process: When using the device, you can first select a suitable storage compartment 1 according to the size of the battery 9. A partition board 2 is provided inside the storage compartment 1 to serve as an isolation. The partition board 2 can divide the interior of the storage compartment 1 into several separate spaces of the same size, so that the batteries 9 placed in the storage compartment 1 can be stored separately to avoid stacking multiple batteries 9 together. The separate placement of the batteries 9 can reduce some potential dangers, and when a problem occurs in one battery 9, it will not affect other batteries 9. A threading hole 3 is also provided on the partition board 2. When a connection line is needed between the batteries 9, the connection line can be inserted through the threading hole. 3, a mounting hole 4 is also provided at the top of the storage bin 1, and the storage bin 1 can be fixed through the mounting hole 4, a fixing hole 5 and a heat dissipation groove 6 are provided at the bottom of the storage bin 1, and the heat dissipation groove 6 is connected to the fixing hole 5, and a fan 7 is fixedly installed inside the fixing hole 5. After the fan 7 is started, the air outside the storage bin 1 can be brought into the storage bin 1 through the heat dissipation groove 6, and a thermal pad 8 is provided at the bottom of the storage bin 1. The battery 9 is placed on the thermal pad 8. The bottom of the battery 9 contacts the thermal pad 8, and the heat can be directly transferred to the thermal pad 8. When the fan 7 is started, air will flow quickly in the heat dissipation groove 6. The heat on the thermal pad 8 can be quickly taken away. A heat sink 10 is also provided on the top of the battery 9. The heat sink 10 is directly placed on the top of the battery 9. A positioning block 13 is also provided inside the storage compartment 1. The four positioning blocks 13 can limit the battery 9 to a fixed position. The battery 9 can be tightly fixed inside the storage compartment 1 through a fixing frame 14 and a connecting plate 15. A fixing bolt 17 is passed between the connecting plate 15 and the positioning block 13, so that the fixing frame 14 can tightly fix the battery 9 to prevent the battery 9 from moving. A heat dissipation copper plate 11 and a fin 12 are also provided on the outside of the battery 9. The copper The plate 11 is in direct contact with the battery 9, and can transfer the heat on the surface of the battery 9 to the fins 12 quickly and efficiently. The rotation of the fan 7 will accelerate the flow of air inside the storage chamber 1. The flow of air can transfer the heat on the heat sink 10, the copper plate 11 and the fins 12, thereby reducing the temperature of the battery 9, protecting the battery 9, and avoiding the dissolution of the SEI film caused by the temperature increase of the battery 9, which may cause an internal short circuit in the battery 9 and thermal runaway. The partition plate 2 divides the storage chamber 1 into several separate spaces, which can provide certain protection facilities between the batteries 9. Through the above-mentioned multiple measures, the probability of thermal runaway of the battery 9 can be reduced.

[0026] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium-ion battery module for preventing thermal runaway, comprising a storage compartment (1), a battery (9) and a fixing frame (14), characterized in that: A cross-shaped partition plate (2) is fixedly connected inside the storage bin (1), a threading hole (3) is provided on the outside of the partition plate (2), a mounting hole (4) is provided at the top of the storage bin (1), a fixing hole (5) penetrating the storage bin (1) is provided at the bottom of the storage bin (1), heat dissipation grooves (6) connected to the fixing hole (5) are provided on both sides of the fixing hole (5), a fan (7) is fixedly connected inside the fixing hole (5), a heat conductive pad (8) is provided above the fixing hole (5), and a battery (9) is provided at the top of the heat conductive pad (8), A copper plate (11) is provided on the outside of the battery (9), and a fin (12) is fixedly connected to the outside of the copper plate (11). A positioning block (13) having a limiting effect is provided inside the storage compartment (1). A heat sink (10) is provided on the top of the battery (9), and a fixing frame (14) is provided on the top of the heat sink (10). A connecting plate (15) is fixedly connected to the bottom of the fixing frame (14). A circular hole (16) penetrating the connecting plate (15) is provided on the top of the connecting plate (15), and a fixing bolt (17) passes through the inside of the circular hole (16).

2. A lithium-ion battery module for preventing thermal runaway according to claim 1, characterized in that: The length of the heat dissipation groove (6) is greater than the length of the thermal conductive pad (8).

3. A lithium-ion battery module for preventing thermal runaway according to claim 1, characterized in that: The length and width of the battery (9) are smaller than the length and width of the thermal pad (8).

4. A lithium-ion battery module for preventing thermal runaway according to claim 1, characterized in that: The number of the copper plates (11) is four, two in a group, and they are symmetrically arranged on both sides of the battery (9).

5. A lithium-ion battery module for preventing thermal runaway according to claim 1, characterized in that: The fixing bolt (17) and the positioning block (13) are threadedly connected.

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