Smoke exhaust structure of battery module and cylindrical battery system

Abstract

The utility model relates to a smoke exhaust structure of a battery module and a cylindrical battery system, which comprises a battery system consisting of a lower shell, an upper cover and a battery positioned in a closed space formed by the lower shell and the upper cover, and the lower shell consists of a shell bottom surface and a shell surrounding edge; a plurality of battery containing grooves used for positioning and fixing the bottom of the shell are formed in the bottom face of the shell, each battery containing groove is composed of the shell bottom face and a side frame, and one or more notches serving as smoke exhaust channels are formed in each side frame. The utility model has the advantages that the structure is reasonable, high-temperature and high-pressure gas is quickly exhausted, explosion and fire are avoided, and the safety is good.

Description

Technical Field

[0001] This utility model belongs to the field of cylindrical battery technology, specifically relating to a smoke exhaust structure for a battery module and a cylindrical battery system. Background Technology

[0002] Lithium-ion or sodium-ion batteries have advantages such as light weight, large energy storage, high power, no pollution, long life, low self-discharge coefficient, and wide temperature adaptability, and are therefore gradually favored by people. They are also gradually replacing other traditional batteries in the fields of energy storage and power batteries. Cylindrical batteries have the characteristics of high production efficiency, low production cost, and good product consistency. Due to the strong structural stability of cylindrical batteries, if high-temperature and high-pressure gases cannot be discharged from the battery and battery system in time during thermal runaway, the battery and system are very likely to explode and catch fire. Therefore, it is very necessary to provide a battery module smoke exhaust structure and cylindrical battery system with reasonable structure, rapid discharge of high-temperature and high-pressure gases, prevention of explosion and fire, and good safety. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a smoke exhaust structure and cylindrical battery system for a battery module that has a reasonable structure, can quickly discharge high-temperature and high-pressure gas, avoids explosion and fire, and has good safety.

[0004] The purpose of this utility model is achieved as follows: a smoke exhaust structure for a battery module, comprising a battery system consisting of a lower housing, an upper cover, and a battery located in the enclosed space formed by the lower housing and the upper cover, characterized in that: the lower housing is composed of a housing bottom surface and a housing perimeter, the housing bottom surface is provided with a plurality of battery receiving slots for positioning and fixing the bottom of the housing, the battery receiving slots are composed of the housing bottom surface and a side frame, and there is one or more notches on the side frame as smoke exhaust channels.

[0005] The battery consists of a housing, a cover plate assembly located at the top and bottom of the housing, and a bottom of the housing; the cover plate assembly consists of an electrode post, a first explosion-proof valve, and a light cover plate, the light cover plate being disposed on the upper surface of the cover plate assembly, the electrode post being disposed in the middle of the light cover plate, and the first explosion-proof valve being disposed on one side of the electrode post.

[0006] The terminal post is the first polarity of the battery, and the light cover plate is the second polarity of the battery.

[0007] The bottom of the housing is provided with a cross groove, and a second explosion-proof valve is provided at the center intersection of the cross groove.

[0008] The lower housing is a box-shaped structure with one open side. The lower housing and the upper cover are sealed with sealant and locked together with screws. A waterproof and breathable valve is provided on one side of the upper cover.

[0009] The side frame is cylindrical, and several steps of the same height are evenly distributed at the junction of the bottom surface of the housing and the cylindrical surface in the battery receiving groove; the notch extends from the cylindrical surface to the bottom surface of the housing.

[0010] The step is used to support the bottom of the battery casing, so that a certain space is reserved between the bottom of the casing and the bottom surface of the casing, providing space for the second explosion-proof valve to open.

[0011] Several intermediate fixing posts are provided on the bottom surface of the housing, and several edge fixing posts are provided on the inner wall of the housing perimeter. A groove for accommodating sealant is provided along the edge of the housing perimeter, and several fixing holes are provided on the outer side of the groove on the housing perimeter.

[0012] A cylindrical battery system having the above-mentioned smoke exhaust structure of the battery module.

[0013] A cylindrical battery system, comprising:

[0014] The upper bracket is located between the lower housing and the upper cover. The upper surface of the upper bracket is provided with a plurality of battery receiving slots for positioning and fixing the top end cover plate assembly of the battery.

[0015] CCS assembly, the CCS assembly being located between the upper support and the upper cover;

[0016] BMS mounting bracket and BMS, wherein the BMS mounting bracket is installed on the inner side of the lower housing, and the BMS is mounted on the BMS mounting bracket;

[0017] The power connector and the signal connector are installed on the sunken surface of the upper cover corresponding to the BMS fixing bracket. The power connector and the signal connector are detachably connected by plugging in.

[0018] The device includes a top handle and a side handle, with the top handle mounted on the top cover and the side handle mounted on the front of the lower housing.

[0019] The beneficial effects of this utility model are as follows: This utility model is a smoke exhaust structure for a battery module, suitable for cylindrical batteries. During use, when the battery triggers thermal runaway, high-temperature and high-pressure gas breaks through the second explosion-proof valve and can be quickly discharged through the gap, preventing the battery from exploding. Afterwards, the high-temperature and high-pressure gas is quickly discharged from the battery system through a waterproof and breathable valve, which can prevent the battery system from exploding and catching fire. This utility model has the advantages of reasonable structure, rapid discharge of high-temperature and high-pressure gas, prevention of explosion and fire, and good safety. Attached Figure Description

[0020] Figure 1This is a schematic diagram of one end of the battery cover assembly of this utility model.

[0021] Figure 2 This is a schematic diagram of the bottom end of the battery casing of this utility model.

[0022] Figure 3 This is a schematic diagram of the battery system of this utility model.

[0023] Figure 4 This is a schematic diagram of the lower shell of this utility model.

[0024] Figure 5 This is an exploded view of the cylindrical battery system of this utility model.

[0025] In the diagram: 1. Lower housing 1-1, Housing bottom surface 1-2, Housing perimeter 1-3, First battery receiving slot 1-4, Cylindrical surface 1-5, Step 1-6, Notch 1-7, Housing middle fixing post 1-8, Housing edge fixing post 1-9, Groove 1-10, First fixing hole 2. Battery 2-1, Cover assembly 2-2, Housing 2-3, Terminal post 2-4, First explosion-proof valve 2-5, Smooth cover 2-6, Housing bottom 2-7, Second explosion-proof valve 3. Upper bracket 4. CCS assembly 5. Top cover 6. BMS fixing bracket 7. BMS 8. Power connector 9. Signal connector 10. Top handle 11. Side handle 12. Sealant 13. Screw 14. Waterproof and breathable valve 0. Battery system. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings. Example

[0027] like Figure 1-5 As shown, a smoke exhaust structure for a battery module includes a battery system 0 consisting of a lower housing 1, an upper cover 5, and a battery 2 located within a closed space formed by the lower housing 1 and the upper cover 5. The battery 2 is composed of a housing 2-2 and cover plate assemblies 2-1 and a housing bottom 2-6 located at the top and bottom of the housing 2-2, respectively. The lower housing 1 is composed of a housing bottom surface 1-1 and a housing perimeter 1-2. The housing bottom surface 1-1 is provided with a plurality of battery receiving slots 1-3 for positioning and fixing the housing bottom 2-6. The battery receiving slots 1-3 are composed of the housing bottom surface 1-1 and a cylindrical surface 1-4. One or more notches 1-6 as smoke exhaust channels are present on the cylindrical surface 1-4.

[0028] The cover plate assembly 2-1 consists of a pole post 2-3, a first explosion-proof valve 2-4, and a light cover plate 2-5. The light cover plate 2-5 is disposed on the upper surface of the cover plate assembly 2-1, the pole post 2-3 is disposed in the middle of the light cover plate 2-5, and the first explosion-proof valve 2-4 is disposed on one side of the pole post 2-3.

[0029] The electrode post 2-3 is the first polarity of the battery 2, and the light cover plate 2-5 is the second polarity of the battery 2.

[0030] A cross groove is provided at the bottom 2-6 of the housing, and a second explosion-proof valve 2-7 is provided at the center intersection of the cross groove.

[0031] The lower housing 1 is a box-shaped structure with one open side. The lower housing 1 and the upper cover 5 are sealed with sealant 12 and locked together with screws 13. A waterproof and breathable valve 14 is provided on one side of the upper cover 5.

[0032] In this embodiment, when the battery triggers thermal runaway, high-temperature and high-pressure gas is quickly discharged from the battery system through a waterproof and breathable valve, preventing the battery system from exploding and catching fire.

[0033] Several steps 1-5 of the same height are evenly distributed at the junction of the bottom surface 1-1 and the cylindrical surface 1-4 of the battery receiving groove 1-3; the notch 1-6 extends from the cylindrical surface 1-4 to the bottom surface 1-1 of the casing.

[0034] The step 1-5 is used to support the bottom 2-6 of the battery 2 housing, so that a certain space is reserved between the bottom 2-6 of the housing and the bottom surface 1-1 of the housing, so as to reserve opening space for the second explosion-proof valve 2-7 to open.

[0035] In this embodiment, the gap serves as a smoke exhaust channel. When the battery triggers thermal runaway, the high-temperature and high-pressure gas breaks through the second explosion-proof valve and can be quickly discharged through the gap, preventing the battery from exploding.

[0036] A plurality of intermediate fixing posts 1-7 are provided on the bottom surface 1-1 of the housing, and a plurality of edge fixing posts 1-8 are provided on the inner wall of the housing perimeter 1-2. A groove 1-9 for accommodating sealant 12 is provided along the edge of the housing perimeter 1-2, and a plurality of fixing holes 1-10 are provided on the outer side of the groove 1-9 on the housing perimeter 1-2.

[0037] This utility model is a smoke exhaust structure for a battery module. During use, when the battery triggers thermal runaway, the high-temperature and high-pressure gas breaks through the second explosion-proof valve 2-7 and can be quickly discharged through the notch 1-6 to prevent the battery from exploding. Afterwards, the high-temperature and high-pressure gas is quickly discharged from the battery system 0 through the waterproof and breathable valve 14, which can prevent the battery system 0 from exploding and catching fire. This utility model has the advantages of reasonable structure, rapid discharge of high-temperature and high-pressure gas, prevention of explosion and fire, and good safety. Example

[0038] like Figure 1-5 As shown, a cylindrical battery system has the above-mentioned exhaust structure for the battery module; including:

[0039] The upper bracket 3 is located between the lower housing 1 and the upper cover 5. The upper surface of the upper bracket 3 is provided with a plurality of battery receiving slots for positioning and fixing the top end cover plate assembly 2-1 of the battery 2.

[0040] In this embodiment, one end of the bottom of the battery casing is positioned and fixed by a battery receiving groove provided in the lower casing, and one end of the battery cover assembly is positioned and fixed by a battery receiving groove provided in the upper bracket.

[0041] CCS component 4, which is located between the upper bracket 3 and the upper cover 5;

[0042] BMS mounting bracket 6 and BMS 7, wherein the BMS mounting bracket 6 is installed on the inner side of the lower housing 1, and the BMS 7 is installed on the BMS mounting bracket 6;

[0043] Power connector 8 and signal connector 9, the signal connector 9 is installed on the sunken surface of the upper cover 5 corresponding to the BMS fixing bracket 6 on one side, and the power connector 8 and signal connector 9 are detachably connected by plugging in.

[0044] A top handle 10 and a side handle 11 are provided. The top handle 10 is mounted on the upper cover 5, and the side handle 11 is mounted on the front of the lower housing 1.

[0045] This utility model is a smoke exhaust structure for a battery module. During use, when the battery triggers thermal runaway, the high-temperature and high-pressure gas breaks through the second explosion-proof valve 2-7 and can be quickly discharged through the notch 1-6 to prevent the battery from exploding. Afterwards, the high-temperature and high-pressure gas is quickly discharged from the battery system 0 through the waterproof and breathable valve 14, which can prevent the battery system 0 from exploding and catching fire. This utility model has the advantages of reasonable structure, rapid discharge of high-temperature and high-pressure gas, prevention of explosion and fire, and good safety.

Claims

1. A smoke exhaust structure for a battery module, comprising a battery system consisting of a lower housing, a upper cover, and a battery located within an enclosed space formed by the lower housing and the upper cover, characterized in that: The lower housing consists of a bottom surface and a perimeter. The bottom surface of the housing is provided with several battery receiving slots for positioning and fixing the bottom of the housing. The battery receiving slots are composed of the bottom surface of the housing and a side frame. There are one or more gaps on the side frame that serve as smoke exhaust channels.

2. The smoke exhaust structure of a battery module according to claim 1, characterized in that: The battery consists of a housing, a cover plate assembly located at the top and bottom of the housing, and a bottom of the housing; the cover plate assembly consists of an electrode post, a first explosion-proof valve, and a light cover plate, the light cover plate being disposed on the upper surface of the cover plate assembly, the electrode post being disposed in the middle of the light cover plate, and the first explosion-proof valve being disposed on one side of the electrode post.

3. The smoke exhaust structure of a battery module according to claim 2, characterized in that: The terminal post is the first polarity of the battery, and the light cover plate is the second polarity of the battery.

4. The smoke exhaust structure of a battery module according to claim 3, characterized in that: The bottom of the housing is provided with a cross groove, and a second explosion-proof valve is provided at the center intersection of the cross groove.

5. The smoke exhaust structure of a battery module according to claim 1, characterized in that: The lower housing is a box-shaped structure with one open side. The lower housing and the upper cover are sealed with sealant and locked together with screws. A waterproof and breathable valve is provided on one side of the upper cover.

6. The smoke exhaust structure of a battery module according to claim 1, characterized in that: The side frame is cylindrical, and several steps of the same height are evenly distributed at the junction of the bottom surface of the housing and the cylindrical surface in the battery receiving groove; the notch extends from the cylindrical surface to the bottom surface of the housing.

7. The smoke exhaust structure of a battery module according to claim 6, characterized in that: The step is used to support the bottom of the battery casing, so that a certain space is reserved between the bottom of the casing and the bottom surface of the casing, providing space for the second explosion-proof valve to open.

8. The smoke exhaust structure of a battery module according to claim 7, characterized in that: Several intermediate fixing posts are provided on the bottom surface of the housing, and several edge fixing posts are provided on the inner wall of the housing perimeter. A groove for accommodating sealant is provided along the edge of the housing perimeter, and several fixing holes are provided on the outer side of the groove on the housing perimeter.

9. A cylindrical battery system, characterized in that: The battery module has a smoke exhaust structure as described in any one of claims 1-8.

10. A cylindrical battery system according to claim 9, characterized in that: include: The upper bracket is located between the lower housing and the upper cover. The upper surface of the upper bracket is provided with a plurality of battery receiving slots for positioning and fixing the top end cover plate assembly of the battery. CCS assembly, the CCS assembly being located between the upper support and the upper cover; BMS mounting bracket and BMS, wherein the BMS mounting bracket is installed on the inner side of the lower housing, and the BMS is mounted on the BMS mounting bracket; The power connector and the signal connector are installed on the sunken surface of the upper cover corresponding to the BMS fixing bracket. The power connector and the signal connector are detachably connected by plugging in. The device includes a top handle and a side handle, with the top handle mounted on the top cover and the side handle mounted on the front of the lower housing.

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