Intelligent battery module for electric vehicle

Abstract

This utility model discloses a battery module for intelligent electric vehicles, relating to the field of battery equipment technology. It includes a housing with a battery pack inside. The battery pack comprises multiple battery cells arranged in one direction. All battery cells have explosion-proof valves located on the same side, positioned between the positive and negative electrodes of the battery cells. A heat insulation plate is provided on top of the explosion-proof valve, closely attached to the end face of the explosion-proof valve of the battery cell. The heat insulation plate has through holes corresponding to the positions of the explosion-proof valves. A cover is provided around the through holes on the top of the heat insulation plate. Pressure relief holes are provided on the sides of the cover, with the arrangement direction of the pressure relief holes of the multiple covers consistent with the arrangement direction of the battery cells. A raised fence is provided on the top of the heat insulation plate, with all covers located inside the fence. A heat-insulating cover is provided on the top of the housing. This utility model provides a large protective area, effectively preventing the spread of hot contents and ensuring the stability and reliability of the battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery equipment technology, specifically to a battery module for intelligent electric vehicles. Background Technology

[0002] A battery module consists of multiple battery cells, each with positive and negative electrodes and an explosion-proof valve on its top. When a battery cell experiences thermal runaway, it bulges and generates significant internal pressure. The explosion-proof valve releases pressure when the internal pressure of the battery cell is high, ejecting hot contents. To prevent heat propagation during thermal runaway, a heat shield is typically installed on top of the battery module to isolate the hot contents from the battery cells. However, this heat shield has a relatively small protected area, and the ejected hot contents still have a considerable chance of spreading to other battery cells, thus affecting the overall reliability of the battery module. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a battery module for intelligent electric vehicles.

[0004] Technical solution: A battery module for an intelligent electric vehicle includes an outer casing. Inside the outer casing is a battery pack comprising multiple battery cells arranged in one direction. All battery cells have explosion-proof valves located on the same side, positioned between the positive and negative electrodes of the battery cell. A heat insulation plate is provided on top of the explosion-proof valve, closely attached to the end face of the explosion-proof valve of the battery cell. The heat insulation plate has through holes corresponding to the positions of the explosion-proof valves. A cover is provided around the through holes on the top of the heat insulation plate. Pressure relief holes are provided on the sides of the cover. The arrangement direction of the pressure relief holes of the multiple covers is consistent with the arrangement direction of the battery cells. A raised fence is provided on the top of the heat insulation plate, with all covers located inside the fence. A heat insulation cover is provided on the top of the outer casing, with an embedding groove at the bottom center of the heat insulation cover that fits into the fence.

[0005] Furthermore, the outer casing has multiple positioning slots inside, and individual battery cells are placed in the positioning slots with a certain distance between adjacent battery cells.

[0006] Furthermore, the pressure relief hole is located in the middle of the side of the cover, and the bottom of the pressure relief hole is at a certain height from the upper surface of the heat insulation plate.

[0007] Furthermore, the top of the outer shell is provided with multiple positioning holes, and the bottom of the heat insulation cover is provided with corresponding positioning posts.

[0008] Furthermore, the shape of the housing is the same as that of the explosion-proof valve.

[0009] Furthermore, the outer casing is provided with screw holes at the four corners, and the outer casing and the heat insulation cover are fixed by bolts, with the bolts threaded into the screw holes.

[0010] Furthermore, the top of the outer casing is provided with multiple clips that engage with the slots at the bottom of the heat insulation cover.

[0011] Beneficial effects: This invention provides a battery module for intelligent electric vehicles. A heat insulation plate is installed on the end face of the battery cell where the explosion-proof valve is located, and a through hole corresponding to the explosion-proof valve is provided on the heat insulation plate. When the explosion-proof valve ruptures, gas and hot contents are ejected from the through hole and constrained by the casing before being ejected horizontally from one side. Other casings can block the ejected contents, preventing them from entering the explosion-proof valve locations of other battery cells. Furthermore, the heat insulation cover, embedded sleeve, and fence work together to constrain the area where the contents can spread, protecting the positive and negative electrodes and other areas of the battery cell. This invention provides a large protected area, effectively preventing the spread of hot contents and ensuring the stability and reliability of the battery module. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the battery module of this utility model in the state of disassembling the heat insulation cover and heat insulation plate; Figure 2 This is a schematic diagram of the battery module of this utility model with the heat insulation cover removed. Figure 3 This is a top view of the heat insulation panel of this utility model; Figure 4 This is a cross-sectional view of the mating structure of the heat insulation cover and the heat insulation plate of this utility model; Figure 5 This is a side view of the heat insulation cover of this utility model.

[0013] In the diagram, 1. Outer shell; 2. Battery pack; 3. Battery cell; 4. Explosion-proof valve; 5. Positive and negative electrodes; 6. Heat insulation plate; 7. Through hole; 8. Cover; 9. Pressure relief hole; 10. Fence; 11. Heat insulation cover; 12. Embedded groove; 13. Positioning groove; 14. Positioning hole; 15. Positioning post; 16. Screw hole; 17. Clip. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings.

[0015] As attached Figure 1 To be continued Figure 5 . Specific implementation examples:

[0017] A battery module for a smart electric vehicle includes a housing 1, inside which a battery pack 2 is housed. The battery pack 2 includes multiple battery cells 3 arranged in one direction, such as... Figure 1 As shown, multiple battery cells 3 are arranged in a straight line, and the explosion-proof valves 4 of all battery cells 3 are located on the same side, as shown. Figure 1 The explosion-proof valves 4 shown are all located at the top, and are positioned between the positive and negative electrodes 5 of the battery cell 3. Figure 2 As shown, the top of the explosion-proof valve 4 is equipped with a heat insulation plate 6, and the structure of the heat insulation plate 6 is as follows. Figure 3 As shown, the heat insulation plate 6 is in close contact with the end face of the explosion-proof valve 4 of the battery cell 3. The heat insulation plate 6 can also cover the area where the positive and negative electrodes 5 are located, shielding the electrode area, and is not limited to... Figure 2 The shown area is located only between the positive and negative electrodes; the heat insulation plate 6 has a through hole 7 corresponding to the position of the explosion-proof valve 4, and a cover 8 is provided around the through hole 7 on the top of the heat insulation plate 6, such as... Figure 4 As shown, the side of the cover 8 is provided with pressure relief holes 9. The arrangement direction of the multiple pressure relief holes 9 of the cover 8 is consistent with the arrangement direction of the battery cells 3, for example, they are all located in Figure 2 On the right side of the direction shown, the top of the heat insulation plate 6 is provided with a raised fence 10, the entire cover 8 is located inside the fence 10, the top of the outer shell 1 is provided with a heat insulation cover plate 11, and the bottom middle position of the heat insulation cover plate 11 is provided with an embedding groove 12 that fits into the fence 10.

[0018] When one of the battery cells 3 experiences thermal runaway and high internal pressure, the explosion-proof valve 4 opens to release pressure, ejecting hot contents. The airflow, carrying the hot contents, exits through the through-holes in the heat insulation plate 6 and the pressure relief holes 9 on the casing 8. Because the pressure relief holes 9 are located on the side of the casing 8, the airflow is ejected horizontally and blocked by the adjacent casing 8. Due to the obstruction of the heat insulation plate 6 and the casing 8, the hot contents ejected from the explosion-proof valve 4 of one battery cell 3 will not spread to the explosion-proof valves 4 of other battery cells 3. Furthermore, due to the cooperative structure of the embedded groove 12 and the fence 10, the ejected hot contents are confined to a certain area and will not splash into the area where the positive and negative electrodes 5 are located, thus avoiding damage to other battery cells 3. Unlike existing systems that place the heat insulation plate 6 on top of the explosion-proof valve 4, the structural design of this embodiment can prevent the hot contents from being ejected upward and impacting the heat insulation plate 6, causing splashing and spreading to the area where other battery cells 3 are located, thereby affecting the reliability of the entire battery module.

[0019] Preferably, the outer casing 1 has multiple positioning slots 13 inside, and the battery cells 3 are placed in the positioning slots 13 with a certain distance between adjacent battery cells 3. This can prevent the battery cells 3 from bulging and increasing in volume, squeezing the adjacent battery cells 3, and causing changes in the volume of the entire battery module.

[0020] The pressure relief hole 9 is located in the middle of the side of the cover 8. The bottom of the pressure relief hole 9 is at a certain height from the upper surface of the heat insulation plate 6, which can prevent the risk of the sprayed contents overflowing from the bottom of the pressure relief hole 9 due to their own fluidity.

[0021] The top of the outer casing 1 is provided with multiple positioning holes 14, such as Figure 5 As shown, the bottom of the heat insulation cover 11 is provided with a corresponding positioning post 15. The positioning post 15 and the positioning hole 14 cooperate to ensure the fitting accuracy between the fence 10 and the embedded groove 12.

[0022] The shape of the housing 8 is the same as that of the explosion-proof valve 4. Common explosion-proof valves 4 are oblong and round.

[0023] The outer casing 1 has screw holes 16 at its four corners. The outer casing 1 and the heat insulation cover 11 are fixed by bolts, and the bolts are threaded into the screw holes 16.

[0024] The top of the outer casing 1 is also provided with multiple clips 17, which engage with the slots at the bottom of the heat insulation cover 11. After the outer casing 17 and the heat insulation cover 11 are engaged, they are further fixed by bolts to ensure the reliability of the fixation. The heat insulation cover 11 presses the heat insulation plate 6 to prevent the heat insulation plate 6 from shifting.

[0025] Although the present invention has been disclosed above with reference to preferred embodiments, these are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of protection of the claims of this application.

Claims

1. A battery module for intelligent electric vehicles, characterized in that, The device includes an outer casing, inside which is a battery pack. The battery pack includes multiple battery cells arranged in one direction. The explosion-proof valves of all battery cells are located on the same side, at the midpoint between the positive and negative electrodes of the battery cells. A heat insulation plate is provided on top of the explosion-proof valve, which is in close contact with the end face of the explosion-proof valve of the battery cell. The heat insulation plate has a through hole corresponding to the position of the explosion-proof valve. A cover is provided around the through hole on the top of the heat insulation plate. The side of the cover has pressure relief holes. The arrangement direction of the pressure relief holes of the multiple covers is consistent with the arrangement direction of the battery cells. A raised fence is provided on the top of the heat insulation plate, and all the covers are located inside the fence. A heat insulation cover is provided on the top of the outer casing, and an embedded groove that fits into the fence is provided at the bottom center of the heat insulation cover.

2. The intelligent battery module for electric vehicles as claimed in claim 1 wherein, The outer casing has multiple positioning slots inside, and individual battery cells are placed in the positioning slots with a certain distance between adjacent battery cells.

3. The intelligent battery module for electric vehicles as claimed in claim 1 wherein, The pressure relief hole is located in the middle of the side of the cover, and the bottom of the pressure relief hole is at a certain height from the upper surface of the heat insulation plate.

4. The intelligent battery module for electric vehicles as claimed in claim 1 wherein, The top of the outer shell is provided with multiple positioning holes, and the bottom of the heat insulation cover is provided with corresponding positioning posts.

5. The intelligent battery module for electric vehicles as claimed in claim 1 wherein, The shape of the cover is the same as that of the explosion-proof valve.

6. The battery module for intelligent electric vehicle according to claim 4, wherein, The outer casing has screw holes at its four corners. The outer casing and the heat insulation cover are fixed together by bolts, which are threaded into the screw holes.

7. The battery module for intelligent electric vehicle according to claim 6, characterized in that, The top of the outer shell is also provided with multiple clips that engage with the slots at the bottom of the heat insulation cover.

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