Battery pack and electric equipment

Abstract

The utility model relates to the field of power batteries, and discloses a battery pack and electric equipment, the battery pack comprises a transition plate, a bottom plate, an edge beam, an anti-explosion valve and a protective cover, the bottom plate and the edge beam are connected to form an accommodating cavity; the transition plate is arranged in the containing cavity and connected with the edge beam, the transition plate is provided with a vent hole, and an exhaust channel communicated with the vent hole is formed between the bottom plate and the transition plate; the boundary beam is provided with a transition channel, and the transition channel is communicated with the exhaust channel; the anti-explosion valve is arranged on the side face of the edge beam and communicates with the transition channel. The protective cover covers the outer side of the anti-explosion valve and is connected with the edge beam, the protective cover is provided with an exhaust port, and the exhaust port faces the bottom side of the battery pack. According to the utility model, high-temperature gas in the battery pack can be sprayed to the bottom of the battery pack, so that the high-temperature gas is prevented from being directly sprayed to a passenger compartment, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power battery, concretely relates to battery pack and electric equipment. BACKGROUND

[0002] Battery pack is the power source of new energy vehicle and is an important component of new energy vehicle. In order to improve the safety of battery pack, the battery pack is provided with an explosion-proof valve. When thermal runaway occurs in a battery monomer in the battery pack and the internal pressure of the battery pack reaches a certain degree, the explosion-proof valve will be started to balance the internal pressure of the battery pack by releasing the spewing matter, thereby preventing the battery from exploding and ensuring the safety performance of the battery.

[0003] The spewing matter spouted from the explosion-proof valve includes high-temperature gas generated by thermal runaway of the battery monomer in the battery pack. When the high-temperature gas is discharged from the explosion-proof valve of the battery pack to the outside, it will catch fire due to high temperature and contact with oxygen in the air, and the flame will burn upward to affect the safety of the passenger cabin. Moreover, the explosion-proof valve of the battery pack is exposed to the outside, and the high-temperature gas spouted from the explosion-proof valve will be radiated in all directions, which will also cause damage to other persons or objects. SUMMARY

[0004] Therefore, the utility model provides a battery pack and electric equipment to solve the problem that the high-temperature gas spouted upward may cause harm to the passenger cabin of the vehicle and exist a safety hazard.

[0005] In a first aspect, the utility model provides a battery pack, which comprises a transition plate, a bottom plate, a side beam, an explosion-proof valve and a protective cover. The transition plate is connected with the side beam, and the bottom plate is connected with the side beam to form a containing cavity together, thereby constituting a battery pack shell. The transition plate is arranged in the containing cavity and connected with the side beam. The transition plate is provided with a ventilation hole. An exhaust passage is formed between the bottom plate and the transition plate, and the exhaust passage is communicated with the ventilation hole. The side beam has a transition passage, and the transition passage is communicated with the exhaust passage. The explosion-proof valve is arranged on the side surface of the side beam and communicated with the transition passage. The protective cover is arranged on the outside of the explosion-proof valve and connected with the side beam. The protective cover has an exhaust port, and the exhaust port faces the bottom side of the battery pack.

[0006] Beneficial effects: The high-temperature gas in the battery pack enters the exhaust passage through the ventilation hole. The high-temperature gas flows through the exhaust passage to the transition passage of the side beam and is discharged by the explosion-proof valve. The gas discharged by the explosion-proof valve changes direction under the blocking and protection of the protective cover and is spouted from the exhaust port to the bottom of the battery pack. The high-temperature gas is prevented from being directly spouted toward the passenger cabin, the safety is improved, and the safety hazard of the battery pack is reduced.

[0007] In an alternative embodiment, the protective cover comprises a cover body and a connecting piece, the cover body abuts against the edge beam to form an exhaust cavity, and the connecting piece is connected to the cover body and the edge beam.

[0008] Beneficial effects: the direction of the ejected gas is changed by the cover body, ensuring that the gas is ejected towards the bottom side of the battery pack; the connection of the cover body and the edge beam is realized by the connecting piece.

[0009] In an alternative embodiment, the cover body comprises a main body portion and a flange portion, one end of the flange portion abuts against the edge beam, and the other end of the flange portion is connected to the main body portion.

[0010] In an alternative embodiment, a mounting hole is formed in the connecting piece, and the battery pack further comprises a fastener, the fastener penetrates through the mounting hole and is fastened in the edge beam.

[0011] Beneficial effects: the connecting piece is fixed on the edge beam by the fastener penetrating through the mounting hole, realizing the detachable connection of the connecting piece and the edge beam, which is simple to operate and facilitates subsequent inspection and maintenance.

[0012] In an alternative embodiment, the edge beam is provided with a clamping groove, and the connecting piece is buckled into the clamping groove and abuts against the groove wall of the clamping groove.

[0013] Beneficial effects: the detachable connection of the connecting piece and the edge beam is realized by buckling the connecting piece into the clamping groove, which is simple to operate and facilitates subsequent inspection and maintenance.

[0014] In an alternative embodiment, the transition plate comprises a first heat insulation plate and a cooling plate, the cooling plate is located above the bottom plate, and the first heat insulation plate is located above the cooling plate, a first through hole is formed in the first heat insulation plate, and a second through hole is formed in the cooling plate, the first through hole and the second through hole together form the air vent hole.

[0015] Beneficial effects: the first heat insulation plate is provided to support the battery monomer and reduce the influence of the discharged high-temperature gas on the battery monomer; the cooling plate is provided to cool the high-temperature gas, so as to avoid the safety hazard caused by the excessively high temperature of the discharged gas.

[0016] In an alternative embodiment, at least one cooling flow channel is provided on the cooling plate, the cooling flow channel protrudes from the cooling plate and extends into the exhaust passage, and the cooling flow channel guides the high-temperature gas in the exhaust passage.

[0017] Beneficial effects: the cooling flow channel protrudes from the cooling plate and extends into the exhaust passage, forming a flow guide device, and the flow guide device realizes the flow guiding effect of the high-temperature gas and the rapid discharge of the high-temperature gas.

[0018] In an alternative embodiment, the battery pack further comprises a second heat insulation plate, which is arranged on one side of the bottom plate close to the exhaust passage.

[0019] Beneficial effects: By arranging the second heat insulation plate, the influence of high-temperature gas on the bottom plate is reduced, and the safety of the battery pack is improved.

[0020] In an alternative embodiment, the second heat insulation plate is provided with a relief hole, and the battery pack further comprises a support, which is connected with the bottom plate through the relief hole and abuts against the transition plate.

[0021] Beneficial effects: By arranging the support, the exhaust passage is always formed between the transition plate and the bottom plate, ensuring the smooth exhaust of high-temperature gas.

[0022] In a second aspect, the utility model also provides a kind of electric equipment, comprising the battery pack described above. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor according to these drawings.

[0024] Figure 1 It is the explosion structure schematic view of the battery pack of the utility model embodiment;

[0025] Figure 2 It is the overall structure schematic view of the battery pack of the utility model embodiment;

[0026] Figure 3 It is Figure 2 the local enlarged schematic view of A in middle;

[0027] Figure 4 It is the overhead structure schematic view of the battery pack of the utility model embodiment;

[0028] Figure 5 It is Figure 4 the A-A section view schematic view of in middle;

[0029] Figure 6 It is the structure schematic view of the protective cover of the utility model embodiment.

[0030] Explanation of reference signs:

[0031] 10, battery cell; 20, transition plate; 21, first heat insulation plate; 22, cooling plate; 23, vent hole; 30, bottom plate; 40, side beam; 50, explosion-proof valve; 60, protective cover; 61, cover body; 611, main body part; 612, flange part; 62, connecting piece; 621, mounting hole; 63, exhaust port; 70, fastener; 80, second heat insulation plate; 90, top cover; 101, exhaust passage; 102, transition passage; 111, accommodating cavity. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] The embodiments of the present application will be described below in conjunction with Figures 1 to 6

[0034] According to the embodiments of the present application, in a first aspect, a battery pack is provided, which comprises a transition plate 20, a bottom plate 30, a side beam 40, an explosion-proof valve 50 and a protective cover 60. The bottom plate 30 and the side beam 40 are connected to form an accommodating cavity 111 together, which constitutes a battery pack shell. The transition plate 20 is arranged in the accommodating cavity 111 and is connected with the side beam 40. The transition plate 20 is provided with a vent hole 23. An exhaust passage 101 is formed between the bottom plate 30 and the transition plate 20. The exhaust passage 101 is in communication with the vent hole 23. The side beam 40 has a transition passage 102. The transition passage 102 is in communication with the exhaust passage 101. The explosion-proof valve 50 is arranged on the side surface of the side beam 40 and is in communication with the transition passage 102. The protective cover 60 is arranged on the outside of the explosion-proof valve 50 and is connected with the side beam 40. The protective cover 60 has an exhaust port 63, which faces the bottom side of the battery pack.

[0035] By using the battery pack of the present embodiments, the high-temperature gas in the battery pack enters the exhaust passage 101 through the vent hole 23. The high-temperature gas flows through the exhaust passage 101 to the transition passage 102 of the side beam 40 and is discharged by the explosion-proof valve 50. The gas discharged by the explosion-proof valve 50 changes direction under the blocking of the protective cover 60 and is sprayed from the exhaust port 63 to the bottom of the battery pack. This avoids the high-temperature gas from being directly sprayed toward the passenger cabin, improves the safety and reduces the safety hazards of the battery pack.

[0036] ​Specifically, in the embodiment, the explosion-proof valve of each battery cell in the battery cell 10 is arranged at the bottom of the battery cell, so as to discharge downward and further avoid the upward eruption of the gas to affect the safety of the passenger compartment.

[0037] Specifically, the transition plate 20 also supports the battery cell 10.

[0038] Specifically, referring to Figure 1 and Figure 4 , the battery pack further comprises the battery cell 10 and the top cover 90, the top cover 90 is arranged at the top of the battery cell 10, and the battery cell 10 is located above the transition plate 20.

[0039] It should be noted that the high-temperature gas in the battery pack is generated by the battery cell 10.

[0040] Specifically, referring to Figure 2 and Figure 3 , the explosion-proof valve 50 is arranged on the side surface of the side beam 40.

[0041] In other alternative embodiments, the explosion-proof valve 50 is arranged on the bottom plate 30. However, during the driving of the automobile, foreign matters such as stones may impact on the battery pack through the automobile chassis, and if the explosion-proof valve 50 is arranged on the bottom plate 30, the foreign matters may impact on the explosion-proof valve 50, causing the explosion-proof valve 50 to be triggered accidentally. Therefore, it is preferred that the explosion-proof valve 50 is arranged on the side surface of the side beam 40, and the gas eruption direction is changed by the protective cover 60.

[0042] It should be noted that the protective cover 60 can also block the foreign matters, preventing the foreign matters from impacting on the explosion-proof valve 50 to cause the explosion-proof valve 50 to be triggered accidentally.

[0043] In one embodiment, as shown in Figure 6 , the protective cover 60 comprises a cover body 61 and a connecting piece 62, the cover body 61 abuts against the side beam 40 to form an exhaust cavity, and the connecting piece 62 is connected with the cover body 61 and the side beam 40. The direction of the ejected gas is changed by the cover body 61, so as to ensure that the gas erupts to the bottom side of the battery pack; and the connection of the cover body 61 and the side beam 40 is realized by the connecting piece 62.

[0044] Specifically, referring to Figure 6 , the connecting piece 62 is provided with two, and the two connecting pieces 62 are arranged on the left side and the right side of the explosion-proof valve 50, respectively.

[0045] Further, the connecting piece 62 is integrally formed with the cover body 61.

[0046] In other alternative embodiments, the connecting piece 62 and the cover body 61 can also be separately arranged and connected by welding or other connection methods.

[0047] Specifically, the cover body 61 covers the outer side of the explosion-proof valve 50, that is, the side of the explosion-proof valve 50 away from the side beam 40.

[0048] In one embodiment, as shown in Figure 6 The cover body 61 includes a main body part 611 and a flange part 612, one end of the flange part 612 abuts against the side beam 40, and the other end of the flange part 612 is connected to the main body part 611. The flange part 612 is provided with three, along the thickness direction of the battery pack, one of which is provided on the top side of the explosion-proof valve 50 along the extension direction of the side beam 40, and the other two are provided on the left and right sides of the explosion-proof valve 50.

[0049] Specifically, please refer to Figure 3 and Figure 6 The main body part 611 is provided on the side of the explosion-proof valve 50 away from the side beam 40, and the three flange parts 612 are respectively provided on the left side, right side and top side of the explosion-proof valve 50. The three flange parts 612 are spaced apart from the explosion-proof valve 50.

[0050] Specifically, the main body part 611 and the flange part 612 are integrally formed.

[0051] Of course, the main body part 611 and the flange part 612 can also be provided separately, and the main body part 611 and the flange part 612 are connected by welding or the like to form the cover body 61.

[0052] In one embodiment, as shown in Figure 3 and Figure 6 The connecting piece 62 is provided with a mounting hole 621, and the battery pack further includes a fastener 70, which penetrates the mounting hole 621 and is fastened in the side beam 40. By penetrating the mounting hole 621 with the fastener 70 to fix the connecting piece 62 on the side beam 40, the detachable connection of the connecting piece 62 and the side beam 40 is realized, which is simple to operate and convenient for subsequent inspection and maintenance.

[0053] In other embodiments, the side beam 40 can also be provided with a clamping groove, and the connecting piece 62 is buckled into the clamping groove and abuts against the groove wall of the clamping groove. By buckling the connecting piece 62 into the clamping groove, the detachable connection of the connecting piece 62 and the side beam 40 is realized, which is simple to operate and convenient for subsequent inspection and maintenance.

[0054] Of course, in other alternative embodiments, the connecting piece 62 and the side beam 40 can also be connected by welding. It can be understood that the connecting piece 62 and the side beam 40 are connected by welding, which is not conducive to the maintenance and replacement of the protective cover 60 in the later period, and therefore the detachable connection of the connecting piece 62 and the side beam 40 is preferred.

[0055] In one embodiment, as shown in Figure 1 and Figure 5As shown, the transition plate 20 includes a first heat insulation plate 21 and a cooling plate 22, the cooling plate 22 is above the bottom plate 30, the first heat insulation plate 21 is above the cooling plate 22, the first heat insulation plate 21 is provided with a first through hole, the cooling plate 22 is provided with a second through hole, and the first through hole and the second through hole jointly form the air vent 23. By setting the first heat insulation plate 21, the battery monomer 10 is supported, and the influence of the discharged high-temperature gas on the battery monomer 10 is reduced; by setting the cooling plate, the high-temperature gas is cooled to prevent the temperature of the discharged gas from being too high to cause safety hazards.

[0056] Specifically, the first heat insulation plate 21 is a mica plate, which has high-temperature resistance and insulation performance, and is more conducive to protecting the battery monomer 10.

[0057] Of course, in other alternative embodiments, the first heat insulation plate 21 can also be made of other heat insulation materials.

[0058] It should be noted that the high-temperature gas may have an impact on other mechanisms of the battery pack. In order to reduce the impact of the high-temperature gas, the cooling plate 22 is provided, and when the high-temperature gas flows through the cooling plate 22, the cooling plate 22 cools the high-temperature gas, thereby reducing the temperature of the discharged gas and improving safety.

[0059] It is worth noting that when the battery pack is working normally, the cooling plate 22 can also stabilize the temperature inside the battery pack to ensure the performance stability of the battery pack; the cooling plate 22 can also cool the battery monomer 10.

[0060] In one embodiment, the cooling plate 22 is provided with at least one cooling flow channel, the cooling flow channel protrudes from the cooling plate 22 and extends into the exhaust passage 101 to guide the high-temperature gas in the exhaust passage 101. The cooling flow channel protrudes from the cooling plate and extends into the exhaust passage to form a flow guide device, which realizes the flow guiding effect of the high-temperature gas and realizes the rapid discharge of the high-temperature gas.

[0061] Specifically, the cooling flow channel is provided with a plurality of cooling flow channels, and the plurality of cooling flow channels avoid the air vent 23, thereby forming a gas flow channel to guide the high-temperature gas.

[0062] Further, the gas flow channel extends towards the explosion-proof valve 50, thereby shortening the distance of the high-temperature gas discharged from the battery pack, reducing the time of the high-temperature gas in the battery pack, and improving the safety of the battery pack.

[0063] In one embodiment, as Figure 5As shown, the battery pack further comprises a second heat insulation plate 80 arranged on one side of the bottom plate 30 close to the exhaust passage 101. By arranging the second heat insulation plate 80, the influence of the high-temperature gas on the bottom plate 30 is reduced, and the high-temperature gas is prevented from scalding the bottom plate 30, thereby improving the safety of the battery pack.

[0064] Specifically, the second heat insulation plate 80 is a mica plate.

[0065] Of course, in other alternative embodiments, the second heat insulation plate 80 can also be made of other heat insulation materials.

[0066] It should be noted that when the high-temperature gas is discharged downward to the exhaust passage 101 through the air vent hole 23, part of the high-temperature gas will directly impact the surface of the bottom plate 30, which may cause the bottom plate 30 to be scalded or melted. Therefore, in order to avoid the safety hazard caused by the high-temperature gas to the bottom plate 30, the second heat insulation plate 80 is arranged on one side of the bottom plate 30 close to the exhaust passage 101 for heat insulation.

[0067] In one embodiment, the second heat insulation plate 80 is provided with a relief hole, and the battery pack further comprises a support member penetrating through the relief hole and connected with the bottom plate 30, and the support member abuts against the transition plate 20. By arranging the support member, the exhaust passage 101 is always formed between the transition plate 20 and the bottom plate 30, thereby ensuring the smooth discharge of the high-temperature gas.

[0068] It should be noted that when the automobile is running, vibration will be generated, and under the influence of the vibration, the transition plate 20 and the bottom plate 30 may collide, thereby causing the transition plate 20 or the bottom plate 30 to be damaged. By arranging the support member, the hidden danger caused by the vibration of the automobile can also be avoided, thereby ensuring the safety of the battery pack.

[0069] According to the embodiments of the utility model, the second aspect further provides a kind of electric equipment, including above-mentioned battery pack.

[0070] Although the embodiments of the utility model are described in conjunction with the drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the utility model.

Claims

1. A battery pack, characterized by, The battery pack comprises: A transition plate (20), a bottom plate (30), a side beam (40), an explosion-proof valve (50) and a protective cover (60), the bottom plate (30) and the side beam (40) are connected to form a containing cavity (111) together; The transition plate (20) is arranged in the containing cavity (111) and connected with the side beam (40), the transition plate (20) is provided with a ventilation hole (23), an exhaust passage (101) is formed between the bottom plate (30) and the transition plate (20), and the exhaust passage (101) communicates with the ventilation hole (23); The side beam (40) has a transition passage (102), and the transition passage (102) communicates with the exhaust passage (101); The explosion-proof valve (50) is arranged on the side beam (40), and the explosion-proof valve (50) communicates with the transition passage (102); The protective cover (60) covers the outside of the explosion-proof valve (50), the protective cover (60) is connected with the side beam (40), the protective cover (60) has an exhaust port (63), and the exhaust port (63) faces the bottom side of the battery pack.

2. The battery pack of claim 1, wherein, The protective cover (60) comprises a cover body (61) and a connecting piece (62), the cover body (61) abuts against the side beam (40) to form an exhaust cavity, and the connecting piece (62) is connected with the cover body (61) and the side beam (40).

3. The battery pack of claim 2, wherein, The cover body (61) comprises a main body part (611) and a turned edge part (612), one end of the turned edge part (612) abuts against the side beam (40), and the other end of the turned edge part (612) is connected with the main body part (611).

4. The battery pack of claim 2, wherein, The connecting piece (62) is provided with a mounting hole (621), and the battery pack further comprises a fastener (70), the fastener (70) penetrates through the mounting hole (621) and is fastened in the side beam (40).

5. The battery pack of claim 2, wherein, The side beam (40) is provided with a clamping groove, the connecting piece (62) is buckled into the clamping groove and abuts against the groove wall of the clamping groove.

6. The battery pack of claim 1, wherein, The transition plate (20) comprises a first heat insulation plate (21) and a cooling plate (22), the cooling plate (22) is located above the bottom plate (30), the first heat insulation plate (21) is located above the cooling plate (22), the first heat insulation plate (21) is provided with a first through hole, the cooling plate (22) is provided with a second through hole, and the first through hole and the second through hole jointly constitute the ventilation hole (23).

7. The battery pack of claim 6, wherein, The cooling plate (22) is provided with at least one cooling flow channel, the cooling flow channel protrudes from the cooling plate (22) and extends into the exhaust passage (101), and high-temperature gas in the exhaust passage (101) is guided.

8. The battery pack of claim 1, wherein, The battery pack further comprises a second heat insulation plate (80), and the second heat insulation plate (80) is arranged on one side of the bottom plate (30) close to the exhaust passage (101).

9. The battery pack of claim 8, wherein, The second heat insulation plate (80) is provided with a relief hole, and the battery pack further comprises a support, the support is connected with the bottom plate (30) through the relief hole, and the support abuts against the transition plate (20).

10. An electric device, characterized by The battery pack comprises any one of claims 1 to 9.

Images