Battery pack

Abstract

The utility model relates to power battery technical field especially relates to a kind of battery pack.The battery pack includes: box, box has the battery compartment and high pressure storehouse that are independent of each other in it;Battery cell, installation is in battery compartment;Sealing cover, installation is in high pressure storehouse, and sealing cooperation with the inner wall of box defines pressure detection storehouse, and pressure detection storehouse is communicated through the beam inner passage of box communication with battery compartment;Pressure detection piece, pressure detection piece installation is in pressure detection storehouse.Battery compartment and high pressure storehouse are independently set to set battery cell and pressure detection piece in different space to realize gas electricity separation arrangement;Based on this, sealing cover defines the pressure detection storehouse that sealing and communication with battery compartment in high pressure storehouse, and pressure detection piece installation is in pressure detection storehouse, both can realize the detection of the pressure in battery compartment, and can reduce the influence to other electrical elements in high pressure storehouse, beneficial to reduce the risk that high temperature flue gas further occurs heat spread, improves the security of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a battery pack. Background Technology

[0002] Pressure sensors are required within the battery pack to monitor the cells. However, when a cell experiences thermal runaway, it generates a large amount of high-temperature fumes. These fumes not only affect the pressure sensors but also adversely impact other electrical components, potentially exacerbating heat spread. Summary of the Invention

[0003] This invention provides a battery pack to solve the technical problem of easy spread of high-temperature flue gas when thermal runaway occurs in the battery cell, thereby improving safety.

[0004] To achieve the above and other related objectives, this utility model provides a battery pack, comprising:

[0005] The housing contains independent battery compartments and high-voltage compartments;

[0006] The battery cell is installed inside the battery compartment;

[0007] A sealing cover is installed inside the high-pressure chamber and seals against the inner wall of the housing to define a pressure detection chamber. The pressure detection chamber is connected to the battery compartment through a channel inside the beam of the housing.

[0008] A pressure detection element is installed inside the pressure detection chamber.

[0009] In one embodiment of the present invention, the housing includes a partition beam and a plurality of surrounding beams, the plurality of surrounding beams being connected to form the housing having a receiving cavity, the partition beam being installed in the receiving cavity and separating the receiving cavity to form the battery compartment and the high voltage compartment, the sealing cover being connected to and sealingly fitted with the surrounding beams, and the internal channel of the beam being disposed inside the surrounding beams.

[0010] In one embodiment of the present invention, the beam channel includes a first channel section, and the pressure detection chamber and the battery chamber are connected through the first channel section.

[0011] In one embodiment of the present invention, the box further includes a bottom plate and a top cover, the bottom plate and the top cover cooperating to close the receiving cavity; the sealing cover has a first connecting part and a second connecting part, the first connecting part being connected to the surrounding beam, and the second connecting part being connected to the bottom plate.

[0012] In one embodiment of the present invention, the beam channel further includes a second channel section communicating with the battery compartment, and an explosion-proof valve is installed on the surrounding beam. The explosion-proof valve is adapted to connect the second channel section with the outside of the box when it is in the open state.

[0013] In one embodiment of the present invention, the first channel segment is connected to the second channel segment.

[0014] In one embodiment of the present invention, the exhaust port of the battery compartment is located between the first channel segment and the second channel segment, and is connected to the first channel segment and the second channel segment.

[0015] In one embodiment of this utility model, the sealing cover is sealed to the inner wall of the box by sealant.

[0016] In one embodiment of the present invention, the sealing cover is provided with a glue groove and a third connecting part located on the inner periphery of the glue groove, the sealant is filled in the glue groove, the first connecting part and the second connecting part are located on the outer periphery of the glue groove, and the pressure detection element is connected and fixed to the third connecting part.

[0017] In one embodiment of the present invention, the sealing cover is provided with a wire harness hole, and the wire harness hole passes through the adhesive groove to connect the pressure detection chamber and the high pressure chamber. The wire harness of the pressure detection component passes through the wire harness hole and extends into the high pressure chamber. The sealant seals the assembly gap between the wire harness and the wire harness hole.

[0018] In one embodiment of this utility model, the pressure detection element includes a pressure sensor.

[0019] The beneficial effects of this utility model are as follows: The battery pack proposed in this utility model has a battery compartment and a high-voltage compartment that are independently arranged so that the battery cells and pressure detection devices are placed in different spaces to achieve gas-electric separation. Based on this, the sealing cover defines a sealed pressure detection compartment that is connected to the battery compartment within the high-voltage compartment. The pressure detection device is installed in the pressure detection compartment, which can not only detect the pressure in the battery compartment, but also reduce the impact on other electrical components in the high-voltage compartment. This helps to reduce the risk of further thermal spread of high-temperature flue gas and improves the safety of the battery pack. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0021] In the attached diagram:

[0022] Figure 1 A top view of a partial structure of a battery pack according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A partial structural diagram of the battery pack;

[0024] Figure 3 for Figure 1 An exploded view of a portion of the battery pack's structure;

[0025] Figure 4 for Figure 1 Main view of the battery pack;

[0026] Figure 5 for Figure 4 Sectional view at point AA;

[0027] Figure 6 for Figure 1 A partial structural diagram of the battery pack when the sealing cover and pressure detection device are removed;

[0028] Figure 7 for Figure 1 A first-view structural schematic diagram of the central sealing cover;

[0029] Figure 8 for Figure 1 A structural schematic diagram of the central sealing cover from a second perspective.

[0030] The attached figures are labeled as follows:

[0031] Box 1, battery compartment 11, exhaust port 111, high voltage compartment 12, pressure detection compartment 13, air inlet 131, partition beam 14, surrounding beam 15, first channel section 151, second channel section 152, bottom plate 16, battery cell 2, pressure detection component 3, sealing cover 4, first connecting part 41, second connecting part 42, glue groove 43, third connecting part 44, wire harness hole 45, explosion-proof valve 5. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0033] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0034] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0035] See Figures 1 to 5 In some optional embodiments, this utility model provides a battery pack, which includes a housing 1, battery cells 2, a pressure detection element 3, and a sealing cover 4. The housing 1 has an independent battery compartment 11 and a high-voltage compartment 12. The battery cells 2 are installed in the battery compartment 11, and the sealing cover 4 is installed in the high-voltage compartment 12. The sealing cover 4 seals against the inner wall of the housing 1, defining a pressure detection compartment 13. The pressure detection compartment 13 is connected to the battery compartment 11 through a channel within the beam of the housing 1. The pressure detection element 3 is installed in the pressure detection compartment 13, enabling it to detect the pressure within the battery compartment 11 and monitor the state of the battery cells 2 within the battery compartment 11.

[0036] Optionally, the housing 1 includes a partition beam 14 and multiple surrounding beams 15. The multiple surrounding beams 15 are connected to form a housing 1 with a receiving cavity. The partition beam 14 is installed in the receiving cavity and separates the receiving cavity to form a battery compartment 11 and a high-voltage compartment 12. The sealing cover 4 is connected to and sealed with the surrounding beams 15. The internal channel of the beam is set inside the surrounding beam 15. That is, the surrounding beam 15 can be a beam structure with a cavity, and the cavity is constructed to form an internal channel of the beam.

[0037] Optionally, the beam-internal channel includes a first channel segment 151, through which the pressure detection chamber 13 and the battery chamber 11 are connected. The pressure detection chamber 13 and the battery chamber 11 are connected via the first channel segment 151 located within the beam, eliminating the need for additional connecting pipes and saving space. This simple structure improves space utilization. Furthermore, it eliminates the need for through holes in the partition beam 14, ensuring the relative independence of the battery chamber 11 and the high-voltage chamber 12. Further, the air inlet 131 of the pressure detection chamber 13 is located on the beam 15 and connected to the first channel segment 151. The first channel segment 151 is connected to the pressure detection chamber 13 via the air inlet 131.

[0038] Optionally, the enclosure also includes a bottom plate 16 and a top cover. The bottom plate 16 is connected to multiple surrounding beams 15 to form an enclosure with an opening. The battery cell 2 is suitable for being installed into the enclosure 1 through the opening. When the top cover seals the opening, it seals the battery compartment 11 and the high-voltage compartment 12. In other words, the bottom plate 16 and the top cover cooperate to seal the receiving cavity. The sealing cover 4 has a first connecting part 41 and a second connecting part 42. The first connecting part 41 is connected to the surrounding beams 15, and the second connecting part 42 is connected to the bottom plate 16. The sealing cover 4 is connected to both the surrounding beams 15 and the bottom plate 16, which helps to improve the stability of the overall structure. Furthermore, there is one first connecting part 41 and two second connecting parts 42. The first connecting part 41 and the two second connecting parts 42 are arranged in a triangular distribution, which helps to further improve the stability of the overall structure.

[0039] Optionally, the beam channel also includes a second channel section 152 communicating with the battery compartment 11. An explosion-proof valve 5 is installed on the beam 15. The explosion-proof valve 5 is suitable for connecting the second channel section 152 to the outside of the housing 1 when it is open. The structure is simple and easy to assemble. Furthermore, the first channel section 151 is connected to the second channel section 152, which can both detect the pressure inside the battery compartment 11 and simplify the structure.

[0040] Optionally, the exhaust port 111 of the battery compartment 11 is located between the first channel section 151 and the second channel section 152, and is connected to the first channel section 151 and the second channel section 152, so that the high-temperature flue gas discharged from the exhaust port 111 can flow to the first channel section 151 and the second channel section 152 in a timely manner, which is beneficial to improving the timeliness of detection. Furthermore, the exhaust port 111 of the battery compartment 11 is opened on the surrounding beam 15. When the battery cell 2 experiences thermal runaway, the high-temperature flue gas in the battery compartment 11 is discharged from the exhaust port 111 and flows to the first channel section 151 and the second channel section 152. The high-temperature flue gas flowing into the first channel section 151 flows into the pressure detection chamber 13 through the air inlet 131, so that the pressure detection element 3 can detect the actual pressure of the battery compartment 11. Then, the pressure detection element 3 can directly or indirectly transmit the detected real data to the vehicle, so that the driver can more intuitively notice the real situation inside the battery pack. The high-temperature flue gas flowing into the second channel section 152 is discharged to the outside of the battery pack through the explosion-proof valve 5 to ensure the safety of the battery pack.

[0041] Optionally, the pressure sensing element 3 includes a pressure sensor.

[0042] In the battery pack of the above embodiment, the battery cell 2 and the pressure detection device 3 are arranged in separate compartments, which is conducive to achieving gas-electric separation. The pressure detection device 3 is located in the high-pressure chamber 12 and is separated from other electrical components in the high-pressure chamber 12 by the sealing cover 4. This helps to prevent high-temperature flue gas from being discharged from the pressure detection chamber 13 to the high-pressure chamber 12 and interfering with other electrical components in the high-pressure chamber 12, thereby reducing the risk of heat spread.

[0043] See Figures 1 to 3 , Figures 6 to 8 In some alternative embodiments, the sealing cover 4 is sealed to the inner wall of the housing 1 by sealant.

[0044] Optionally, the sealing cover 4 is provided with a glue groove 43 and a third connecting part 44 located on the inner periphery of the glue groove 43. The glue groove 43 is arranged circumferentially around the sealing cover 4, and the sealant is filled in the glue groove 43. The first connecting part 41 and the second connecting part 42 are located on the outer periphery of the glue groove 43. That is, the connection point between the sealing cover 4 and the housing 1 is located on the outer periphery of the glue groove 43, which helps to ensure the sealing performance of the connection between the sealing cover 4 and the housing 1. The pressure detection element 3 is connected and fixed to the third connecting part 44, so that the pressure detection element 3 can be located on the inner side of the seal, which helps to improve the sealing performance of the space where the pressure detection element 3 is located.

[0045] Optionally, the sealing cover 4 is provided with a wire harness hole 45, and the wire harness hole 45 passes through the glue groove 43 to connect the pressure detection chamber 13 and the high pressure chamber 12. The wire harness of the pressure detection component 3 extends into the high pressure chamber 12 through the wire harness hole 45. The sealant seals the assembly gap between the wire harness and the wire harness hole 45. This structural design allows the sealant to fill the assembly gap between the wire harness and the sealing cover 4 when the glue groove 43 is filled with sealant, thereby achieving a sealed assembly. This not only helps to improve the sealing performance and reduce the risk of high-temperature flue gas in the pressure detection chamber 13 entering the high pressure chamber 12, but also facilitates the wiring arrangement of the wire harness of the pressure detection component 3 in the high pressure chamber 12.

[0046] In this utility model, the battery cell 2 and the pressure detection element 3 are respectively installed in the battery compartment 11 and the high-voltage compartment 12, which is conducive to achieving gas-electric separation arrangement. The sealing cover 4 cooperates with the housing 1 to form a sealed pressure detection compartment 13 in part of the high-voltage compartment 12. This allows the pressure detection element 3 to be connected to the battery compartment 11 but isolated from other electrical components in the high-voltage compartment 12, reducing the risk of high-temperature flue gas in the pressure detection compartment 13 entering the high-voltage compartment 12 and affecting other electrical components, thus improving safety.

[0047] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A battery pack, characterized in that, include: The housing contains independent battery compartments and high-voltage compartments; The battery cell is installed inside the battery compartment; A sealing cover is installed inside the high-pressure chamber and seals against the inner wall of the housing to define a pressure detection chamber. The pressure detection chamber is connected to the battery compartment through a channel inside the beam of the housing. A pressure detection element is installed inside the pressure detection chamber.

2. The battery pack according to claim 1, characterized in that, The enclosure includes a partition beam and multiple surrounding beams, which are connected to form an enclosure with a receiving cavity. The partition beam is installed in the receiving cavity and separates the receiving cavity to form the battery compartment and the high-voltage compartment. The sealing cover is connected to the surrounding beam and seals with it. The channel inside the beam is located inside the surrounding beam.

3. The battery pack according to claim 2, characterized in that, The beam internal channel includes a first channel section, through which the pressure detection chamber and the battery chamber are connected.

4. The battery pack according to claim 2, characterized in that, The enclosure also includes a bottom plate and a top cover, which cooperate to seal the receiving cavity; the sealing cover has a first connecting part and a second connecting part, the first connecting part being connected to the surrounding beam, and the second connecting part being connected to the bottom plate.

5. The battery pack according to claim 3, characterized in that, The beam passage also includes a second passage section that communicates with the battery compartment. An explosion-proof valve is installed on the beam, and the explosion-proof valve is adapted to connect the second passage section with the outside of the enclosure when it is in the open state.

6. The battery pack according to claim 5, characterized in that, The first channel segment is connected to the second channel segment.

7. The battery pack according to claim 6, characterized in that, The exhaust port of the battery compartment is located between the first channel segment and the second channel segment, and is connected to both the first channel segment and the second channel segment.

8. The battery pack according to claim 4, characterized in that, The sealing cover is sealed to the inner wall of the box by sealant.

9. The battery pack according to claim 8, characterized in that, The sealing cover has a glue groove and a third connecting part located on the inner periphery of the glue groove. The sealant is filled in the glue groove. The first connecting part and the second connecting part are located on the outer periphery of the glue groove. The pressure detection element is connected and fixed to the third connecting part.

10. The battery pack according to claim 9, characterized in that, The sealing cover is provided with a wire harness hole, and the wire harness hole passes through the glue groove to connect the pressure detection chamber and the high pressure chamber. The wire harness of the pressure detection component passes through the wire harness hole and extends into the high pressure chamber. The sealant seals the assembly gap between the wire harness and the wire harness hole.

11. The battery pack according to claim 1, characterized in that, The pressure detection element includes a pressure sensor.

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