Parallel lithium battery module

Abstract

The utility model discloses a parallel lithium battery module, and relates to the field of battery module protection. The battery pack protection device comprises the lower shell and the upper shell, the protection mechanism is arranged in the upper shell, and when the upper shell is installed on the lower shell, the battery pack in the lower shell can be in a closed state, so that the battery pack is prevented from being damaged. After combustion, the fire-fighting liquid prepared from the perfluoroethyl isopropyl ketone can be quickly converted into a gas state from a liquid state due to the temperature, and when the temperature reaches 90 DEG C or above, the liquid storage bag can quickly generate vapor pressure; when the battery pack is in use, vapor pressure can be split through the tearing opening, so that gaseous perfluoroethyl isopropyl ketone can be sprayed out from the fire-fighting opening by fire-fighting liquid, and after the perfluoroethyl isopropyl ketone is sprayed out, flames generated by combustion of the battery pack can be quickly extinguished due to the inertia of the perfluoroethyl isopropyl ketone, so that the overall safety is improved; and serious damage to the external environment caused by the battery pack is avoided.

Description

Technical Field

[0001] The utility model relates to the field of battery module protection, in particular to a parallel lithium battery module. Background Art

[0002] Lithium battery is a type of battery. Its working principle is to store and release energy by moving lithium batteries between positive and negative electrodes. Lithium batteries rely on the process of embedding and de-embedding cations to charge and discharge. A combination of multiple lithium battery packs combined and fixed in parallel is called a parallel lithium battery module.

[0003] During the use of existing parallel lithium battery modules, a large amount of heat will be generated during the charging process due to the resistance of the battery. If the overcharging time is too long or the voltage is too high, dendrite short circuits are likely to occur inside the potassium battery module, causing the temperature and pressure to continue to rise, thereby posing a fire risk. In order to avoid this situation, it is necessary to provide a novel protection mechanism that can quickly extinguish the fire after the parallel lithium battery module burns, thereby avoiding the increase of the fire. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a parallel lithium battery module to solve the technical problem that the parallel lithium battery module may be overloaded and burned during use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a parallel lithium battery module, comprising a lower shell and an upper shell, a protective mechanism is arranged inside the upper shell, the protective mechanism comprises a placement groove, a liquid storage bag is placed inside the placement groove, a fire-fighting liquid is stored inside the liquid storage bag, a fire-fighting port is opened below the liquid storage bag, and a tearing port is arranged on one side of the bottom of the liquid storage bag near the fire-fighting port.

[0006] By adopting the above technical solution, the battery pack can be effectively protected by the lower shell and the upper shell to prevent the battery pack from being damaged.

[0007] Furthermore, a mounting plate is provided on the inner side of the fire opening, and a top pin is provided on the top of the mounting plate.

[0008] By adopting the above technical solution, a mounting plate is provided on the inner side of the fire outlet, and the ejector pin can be effectively mounted through the mounting plate.

[0009] Furthermore, a visual window is arranged on the top of the upper shell, and the visual window is arranged in a rectangular structure.

[0010] By adopting the above technical solution, since a visual window is provided on the top of the upper shell, the production date of the liquid storage package can be effectively seen through the visual window.

[0011] Furthermore, a sealing groove is provided at the bottom of the upper shell, a second sealing block is provided inside the sealing groove, and a first sealing block is provided at the top of the lower shell, and the first sealing block fits with the sealing groove.

[0012] By adopting the above technical solution, the battery pack is placed in the lower shell, and then the upper shell and the lower shell can be fixed by bolts. A labyrinth sealing structure can be formed by the first sealing block, the sealing groove, and the second sealing block, so that the interior of the lower shell can be made sealed.

[0013] Furthermore, a battery pack is disposed inside the lower shell, and the battery pack is composed of a plurality of battery cells, and the plurality of battery cells are adhered to each other by an adhesive sheet.

[0014] By adopting the above technical solution, a battery pack is arranged inside the lower shell, and energy storage operations and electric energy storage can be performed through the battery pack.

[0015] Furthermore, a plurality of parallel terminals are arranged on the top of the battery pack, and the plurality of parallel terminals are connected by electrical conductors.

[0016] By adopting the above technical solution, a plurality of parallel terminals are arranged on the top of the battery pack, and the circuit lines can be effectively connected through the parallel terminals.

[0017] Furthermore, a conductive plate is provided on one side of the battery pack, a liquid cooling tube is provided inside the conductive plate, a circulating pump is provided on one side of the lower shell, liquid guide tubes are provided at the output end and the output end of the circulating pump, and the two liquid guide tubes are connected to the liquid inlet and liquid outlet of the liquid cooling tube.

[0018] By adopting the above technical solution, since a conduction sheet is provided on one side of the battery pack, and a liquid cooling tube is provided inside the conduction sheet, heat can be effectively conducted through the conduction sheet.

[0019] Furthermore, the lower shell and the upper shell are both made of engineering plastics, and the fire fighting fluid is made of perfluoroethyl isopropyl ketone.

[0020] By adopting the above technical solution, since the materials of the lower shell and the upper shell are both engineering plastics, the materials of the lower shell and the upper shell can effectively reduce the weight of the overall device, making the device lighter and easier to carry. At the same time, engineering plastics also have good mechanical strength and can effectively protect the internal battery pack from damage due to external impact.

[0021] In summary, the utility model mainly has the following beneficial effects:

[0022] 1. The utility model provides a protective mechanism. When the upper shell is installed on the lower shell, the battery pack inside the lower shell will form a sealed state. After burning, the fire-fighting liquid made of perfluoroethyl isopropyl ketone will quickly change from liquid to gas due to the temperature. When the temperature reaches above 90 degrees Celsius, the liquid storage bag will quickly generate vapor pressure, which will burst through the tearing hole so that the fire-fighting liquid and the gaseous perfluoroethyl isopropyl ketone can be sprayed out through the fire-fighting hole. After the perfluoroethyl isopropyl ketone is sprayed out, the flame of the battery pack can be quickly extinguished due to its inertia, thereby improving the overall safety and preventing the battery pack from causing serious damage to the external environment.

[0023] 2. The utility model is provided with a mounting plate, an ejector pin and a visual window. When a fire occurs, in order to avoid the situation that the tearing mouth is not broken due to poor production quality, or the liquid storage bag is broken in an incorrect position and the fire is not extinguished immediately, when the liquid storage bag expands to a certain size, it will contact the ejector pin, and then the tearing mouth will be punctured to facilitate the spraying of gaseous perfluoroethylisopropyl ketone. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of a partial three-dimensional structure of the lower shell of the utility model;

[0026] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the upper shell of the utility model;

[0027] Figure 4 It is a side view stereoscopic structural schematic diagram of the utility model;

[0028] Figure 5 For this utility model Figure 3 Schematic diagram of the structure enlarged at point A in the middle.

[0029] In the figure: 1. lower shell; 2. upper shell; 3. battery pack; 4. parallel end; 5. adhesive sheet; 6. circulation pump; 7. conduction sheet; 8. liquid guide tube; 9. protection mechanism; 901. placement slot; 902. liquid storage bag; 903. fire-fighting liquid; 904. tearing hole; 905. installation sheet; 906. ejector pin; 907. fire-fighting port; 10. visual window; 11. first sealing block; 12. sealing groove; 13. second sealing block. DETAILED DESCRIPTION

[0030] 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. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0031] The following describes an embodiment of the utility model based on its overall structure.

[0032] A parallel lithium battery module, such as Figure 1-Figure 5 As shown, it includes a lower shell 1 and an upper shell 2, and a protective mechanism 9 is arranged inside the upper shell 2. The protective mechanism 9 includes a placement groove 901, and a liquid storage bag 902 is placed inside the placement groove 901. The liquid storage bag 902 stores fire-fighting liquid 903 inside. A fire-fighting port 907 is opened below the liquid storage bag 902, and a tearing port 904 is arranged on one side of the bottom of the liquid storage bag 902 near the fire-fighting port 907. The lower shell 1 and the upper shell 2 can effectively protect the battery pack 3 from damage. The protective mechanism 9 can be used to perform fire-fighting operations after the battery pack 3 accidentally burns.

[0033] See also Figure 1 , Figure 4 , Figure 5 A mounting piece 905 is disposed on the inner side of the fire outlet 907 , and a ejector pin 906 is disposed on the top of the mounting piece 905 . The ejector pin 906 can be effectively installed through the mounting piece 905 , and the tear opening 904 can be punctured through the ejector pin 906 .

[0034] See also Figure 1 , Figure 3 , Figure 4 A visual window 10 is provided on the top of the upper shell 2. The visual window 10 is arranged in a rectangular structure. Through the visual window 10, the production date of the liquid storage bag 902 and the status of the liquid storage bag 902 can be effectively seen.

[0035] See also Figure 1 , Figure 3 , Figure 4 A sealing groove 12 is provided at the bottom of the upper shell 2, and a second sealing block 13 is provided on the inner side of the sealing groove 12. A first sealing block 11 is provided on the top of the lower shell 1, and the first sealing block 11 fits with the sealing groove 12. The battery pack 3 is placed on the lower shell 1, and then the upper shell 2 and the lower shell 1 can be fixed by bolts. A labyrinth sealing structure can be formed by the first sealing block 11, the sealing groove 12, and the second sealing block 13. At this time, the interior of the lower shell 1 can be closed. When the lower shell 1 is in a sealed state, the battery can be protected from moisture, dust and other adverse effects, thereby extending the battery life.

[0036] See also Figure 1 , Figure 2 , Figure 4A battery pack 3 is arranged inside the lower shell 1. The battery pack 3 is composed of a plurality of battery cells. The plurality of battery cells are bonded to each other by an adhesive sheet 5. The battery pack 3 can be used for energy storage and electric energy storage. Moreover, the plurality of battery cells can be bonded to each other by the adhesive sheet 5, thereby improving the overall stability.

[0037] See also Figure 1 , Figure 2 , Figure 4 A plurality of parallel terminals 4 are provided on the top of the battery pack 3, and the plurality of parallel terminals 4 are connected by electrical conductors. The circuit lines can be effectively connected through the parallel terminals 4, and the plurality of circuit lines can effectively promote the parallel connection of a plurality of battery cells to form a battery pack 3.

[0038] See also Figure 1 , Figure 2 , Figure 4 A conduction sheet 7 is provided on one side of the battery pack 3, a liquid cooling pipe is provided inside the conduction sheet 7, a circulation pump 6 is provided on one side of the lower shell 1, and liquid guide tubes 8 are provided at the output end and the output end of the circulation pump 6, and the two liquid guide tubes 8 are connected to the liquid inlet end and the liquid outlet end of the liquid cooling pipe. Heat can be effectively conducted through the conduction sheet 7, and during the normal use of the battery, the circulation pump 6 will be continuously started. At this time, the circulation pump 6 will drive the coolant inside the liquid guide tube 8 to circulate, so as to cool the battery pack 3 on a daily basis.

[0039] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 The material of the lower shell 1 and the upper shell 2 are both engineering plastics, and the material of the fire-fighting liquid 903 is perfluoroethyl isopropyl ketone. Therefore, the material of the lower shell 1 and the upper shell 2 can effectively reduce the weight of the overall device, making the device lighter and easier to carry. At the same time, the engineering plastic also has good mechanical strength, which can effectively protect the internal battery pack 3 from damage by external impact. Moreover, the fire-fighting liquid 903 made of perfluoroethyl isopropyl ketone will quickly transform from liquid to gas due to temperature. When the temperature reaches above 90 degrees Celsius, the liquid storage bag 902 will quickly generate vapor pressure, and the vapor pressure will break through the tearing hole 904, so that the fire-fighting liquid 903 and the fire-fighting hole 907 can spray out the gaseous perfluoroethyl isopropyl ketone. When the perfluoroethyl isopropyl ketone is sprayed out, due to its inertia, it can quickly extinguish the burning flame of the battery pack 3, thereby improving the overall safety and avoiding the battery pack 3 from causing serious damage to the external environment.

[0040] The implementation principle of the utility model is as follows: first, the lower shell 1 needs to be placed on a workbench, and then the battery pack 3 is placed on the lower shell 1, and then the upper shell 2 and the lower shell 1 can be fixed by bolts, and a labyrinth seal structure can be formed by the first sealing block 11, the sealing groove 12, and the second sealing block 13, so that the interior of the lower shell 1 can be made airtight. During the normal use of the battery, the circulating pump 6 will be continuously started, and the circulating pump 6 will drive the coolant in the liquid guide tube 8 to circulate, so as to cool the battery pack 3 on a daily basis;

[0041] During the long-term use of the parallel lithium battery module, a large amount of heat will be generated during the charging process due to the resistance of the battery. If the overcharging time is too long or the voltage is too high, dendrite short circuits are likely to occur inside the lithium battery, causing the temperature and pressure to continue to rise, which may cause combustion. When combustion occurs, the parallel potassium battery module will quickly heat up. When the temperature reaches above 90 degrees Celsius, the fire-fighting liquid 903 made of perfluoroethyl isopropyl ketone will quickly transform from liquid to gas due to the temperature, and the liquid storage bag 902 will quickly generate vapor pressure, which will then burst through the tearing hole 904, so that the fire-fighting liquid 903 and the gaseous perfluoroethyl isopropyl ketone can be sprayed out through the fire-fighting hole 907. When the perfluoroethyl isopropyl ketone is sprayed out, due to its inertia, it can quickly extinguish the burning flame of the battery pack 3, thereby improving the overall safety and preventing the battery pack 3 from causing serious damage to the external environment.

[0042] In addition, in order to avoid the situation where the tear 904 does not break due to poor production quality, or the liquid storage bag breaks at an incorrect position and the fire is not extinguished immediately, when the liquid storage bag 902 expands to a certain size, it will contact the ejector pin 906, and the tear 904 will be punctured to facilitate the spraying of gaseous perfluoroethylisopropyl ketone.

[0043] Parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art, and will not be described in detail here.

[0044] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A parallel lithium battery module, characterized in that: The invention comprises a lower shell (1) and an upper shell (2), wherein a protective mechanism (9) is arranged inside the upper shell (2), wherein the protective mechanism (9) comprises a placement groove (901), wherein a liquid storage bag (902) is placed inside the placement groove (901), wherein a fire-fighting liquid (903) is stored inside the liquid storage bag (902), wherein a fire-fighting port (907) is provided below the liquid storage bag (902), and wherein a tearing port (904) is provided on one side of the bottom of the liquid storage bag (902) close to the fire-fighting port (907).

2. The parallel lithium battery module according to claim 1, characterized in that: A mounting plate (905) is provided on the inner side of the fire-fighting opening (907), and a top pin (906) is provided on the top of the mounting plate (905).

3. The parallel lithium battery module according to claim 1, characterized in that: A visual window (10) is provided on the top of the upper shell (2), and the visual window (10) is provided in a rectangular structure.

4. The parallel lithium battery module according to claim 1, characterized in that: A sealing groove (12) is provided at the bottom of the upper shell (2), a second sealing block (13) is provided inside the sealing groove (12), and a first sealing block (11) is provided at the top of the lower shell (1), the first sealing block (11) being fitted with the sealing groove (12).

5. The parallel lithium battery module according to claim 1, characterized in that: A battery pack (3) is arranged inside the lower housing (1), the battery pack (3) being composed of a plurality of battery cells, and the plurality of battery cells being bonded together via bonding sheets (5).

6. The parallel lithium battery module according to claim 5, characterized in that: A plurality of parallel terminals (4) are arranged on the top of the battery pack (3), and the plurality of parallel terminals (4) are all connected via electrical conductors.

7. The parallel lithium battery module according to claim 5, characterized in that: A conductive sheet (7) is provided on one side of the battery pack (3), a liquid cooling tube is provided inside the conductive sheet (7), a circulating pump (6) is provided on one side of the lower shell (1), a liquid guiding tube (8) is provided at both the output end and the output end of the circulating pump (6), and the two liquid guiding tubes (8) are connected to the liquid inlet end and the liquid outlet end of the liquid cooling tube.

8. The parallel lithium battery module according to claim 1, characterized in that: The lower shell (1) and the upper shell (2) are both made of engineering plastics, and the fire-fighting fluid (903) is made of perfluoroethyl isopropyl ketone.

Images