Battery pack and electric equipment

Abstract

The utility model relates to the technical field of battery packs, and discloses a battery pack and electric equipment, the battery pack comprises a box body, a plurality of battery monomers, a supporting plate, an insulating layer and a connecting piece, the box body is provided with an accommodating cavity, the inner side wall of the box body is convexly provided with a stopping part, and the stopping part is provided with a first through hole along a first direction; the plurality of single batteries are arranged in the accommodating cavity, and the plurality of single batteries and the stopping part are arranged at intervals; the supporting plate is arranged in the accommodating cavity, the supporting plate supports a plurality of battery monomers, and a plurality of exhaust holes are formed in the supporting plate relative to the battery monomers; second through holes are formed in the supporting plate, the second through holes and the exhaust holes are arranged at intervals, and the second through holes and the first through holes are opposite in the first direction; the insulating layer is arranged between the supporting plate and the stopping part, a third through hole is formed in the insulating layer, and the third through hole is opposite to the first through hole in the first direction; the connecting piece penetrates through the first through hole, the third through hole and the second through hole to connect the stopping part and the supporting plate. The connecting piece is in insulated connection with the inner wall of the first through hole and the inner wall of the second through hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, especially a kind of battery pack and electric equipment. BACKGROUND

[0002] With the rapid development of power battery technology, it promotes the widespread popularity of new energy vehicles. Battery safety has become the focus of consumers, and electrical protection is the key to battery pack safety design.

[0003] The battery pack usually includes a box body and a plurality of battery monomers installed in the box body. Each battery monomer is provided with an explosion-proof valve. The inside of the battery pack is also provided with a support. The support bears the battery monomers. When the battery monomers are out of control, the explosion-proof valve will burst, and the spewing material (such as high-temperature and high-pressure gas, molten material, etc.) in the battery monomer will spew out through the explosion-proof valve. However, if the spewing material contacts the support, and the support is a non-insulating part, the support and the box body form a conductive connection, thereby causing the overall insulation failure of the battery pack, which may cause more serious battery pack short circuit accidents.

[0004] In summary, when the battery monomers are out of control, the support and the box body are likely to form a conductive connection, which may cause the insulation failure of the entire battery pack, and the battery safety is poor. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem that when the battery monomers are out of control, the support and the box body are likely to form a conductive connection, which may cause the insulation failure of the entire battery pack, and the battery safety is poor.

[0006] To solve the above technical problems, the utility model provides a technical scheme of a battery pack:

[0007] The battery pack has a first direction and includes:

[0008] The box body has a receiving cavity. The inner side wall of the box body is provided with a stop portion. The stop portion is protrudingly arranged towards the receiving cavity. The stop portion is provided with a first through hole along the first direction.

[0009] A plurality of battery monomers are arranged in the receiving cavity, and each of the battery monomers is spaced apart from the stop portion.

[0010] A support plate is arranged in the receiving cavity. The support plate supports a plurality of battery monomers. The support plate is provided with a plurality of exhaust holes, and each exhaust hole is opposite to a battery monomer. The support plate is provided with a second through hole. The second through hole is spaced apart from the exhaust hole. The second through hole and the first through hole are arranged opposite to each other along the first direction.

[0011] An insulating layer is arranged between the support plate and the stop portion, and the insulating layer is provided with a third through hole opposite to the first through hole along the first direction;

[0012] A connecting piece is arranged through the first through hole, the third through hole and the second through hole to connect the stop portion and the support plate, and the connecting piece is insulatedly connected with the inner wall of the first through hole and the inner wall of the second through hole respectively.

[0013] Further, the battery pack also has a second direction and a third direction, and the first direction, the second direction and the third direction intersect with each other;

[0014] The box body includes a plurality of side beams, and the plurality of side beams are connected to surround the accommodation cavity, and the stop portion is arranged on the side beam close to the side wall of the accommodation cavity; in the second direction and the third direction, the support plate and the side wall close to the accommodation cavity of the side beam have a gap.

[0015] Further, the side beams include two first side beams and two second side beams, the first side beams extend along the second direction, and the second side beams extend along the third direction;

[0016] The two first side beams are arranged at intervals along the third direction, and the ends of the second side beams in the third direction are connected with the two first side beams respectively; the two second side beams are arranged at intervals along the second direction, and the ends of the first side beams in the second direction are connected with the two second side beams respectively;

[0017] The stop portion includes a first stop piece arranged on the first side beam, the first stop piece has a strip-shaped structure, the two ends of the first stop piece in the second direction are connected with the two second side beams respectively, and the first stop piece is stop-fitted with the support plate along the first direction.

[0018] Further, the stop portion includes a second stop piece arranged on the second side beam, the second stop piece has a strip-shaped structure, the two ends of the second stop piece in the third direction are connected with the two first stop pieces respectively, and the second stop piece is stop-fitted with the support plate along the first direction.

[0019] Further, the stop portion includes a plurality of stop blocks, at least part of the stop blocks are respectively provided with at least one first through hole, and the plurality of stop blocks are arranged at intervals along the second direction or the third direction, and the stop blocks are stop-fitted with the support plate along the first direction.

[0020] Further, the connecting piece comprises a connecting piece body and an insulating sleeve, the insulating sleeve is sleeved on the connecting piece body, and the insulating sleeve is connected with the inner wall of the first through hole and the inner wall of the second through hole respectively.

[0021] Further, the connecting piece body is provided with a first limiting part and a second limiting part, the first limiting part is limited and matched with the stop part along the first direction, and the second limiting part is limited and matched with the support plate along the first direction.

[0022] Further, an insulating coating is arranged on the outer surface of the connecting piece; and / or the connecting piece is an insulator.

[0023] Further, the battery pack further comprises a flow guide piece, the flow guide piece is arranged through the exhaust hole, the flow guide piece has an exhaust passage in the inside, the battery monomer corresponding to the exhaust hole is provided with an explosion-proof valve, and the flow guide piece surrounds the explosion-proof valve.

[0024] An insulator is arranged between the flow guide piece and the inner hole wall of the exhaust hole, and / or at least one of the flow guide piece and the support plate is an insulator.

[0025] In order to solve the above technical problems, the utility model also provides a kind of technical scheme of electric equipment:

[0026] Electric equipment, including battery pack;The battery pack has first direction, comprising:

[0027] Box, the box has accommodating cavity, the inner wall of the box is provided with stop part, the stop part is set outwards to the accommodating cavity, and the first through hole is opened in the stop part along the first direction;

[0028] Multiple battery monomers are arranged in the accommodating cavity, and the multiple battery monomers are arranged at intervals with the stop part;

[0029] Support plate, the support plate is arranged in the accommodating cavity, and the support plate supports the multiple battery monomers, the support plate is provided with multiple exhaust holes, and the exhaust hole is opposite to the battery monomer one by one;The support plate is provided with second through hole, the second through hole is arranged at intervals with the exhaust hole, and the second through hole is arranged opposite to the first through hole along the first direction;

[0030] Insulating layer, the insulating layer is arranged between the support plate and the stop part, the insulating layer is provided with third through hole, and the third through hole is arranged opposite to the first through hole along the first direction;

[0031] A connecting piece is provided through the first through hole, the third through hole and the second through hole to connect the stop part and the support plate, and the connecting piece is insulatedly connected with the inner wall of the first through hole and the inner wall of the second through hole respectively.

[0032] Further, the battery pack also has a second direction and a third direction, the first direction, the second direction and the third direction intersect with each other;

[0033] The box body comprises a plurality of side beams, the plurality of side beams are connected to surround the containing cavity, and the stop part is arranged on the side beam close to the side wall of the containing cavity; in the second direction and the third direction, the support plate has a gap with the side wall of the containing cavity close to the side beam.

[0034] Further, the side beam comprises two first side beams and two second side beams, the first side beam extends along the second direction, and the second side beam extends along the third direction;

[0035] The two first side beams are arranged at intervals along the third direction, and the second side beam is connected with the two first side beams at the ends in the third direction respectively; the two second side beams are arranged at intervals along the second direction, and the first side beam is connected with the two second side beams at the ends in the second direction respectively;

[0036] The stop part comprises a first stop piece arranged on the first side beam, the first stop piece is in a strip-shaped structure, the two ends of the first stop piece along the second direction are connected with the two second side beams respectively, and the first stop piece is stop-fitted with the support plate along the first direction.

[0037] Further, the stop part comprises a second stop piece arranged on the second side beam, the second stop piece is in a strip-shaped structure, the two ends of the second stop piece along the third direction are connected with the two first stop pieces respectively, and the second stop piece is stop-fitted with the support plate along the first direction.

[0038] Further, the stop part comprises a plurality of stop blocks, at least part of the stop blocks are respectively provided with at least one first through hole, and the plurality of stop blocks are arranged at intervals along the second direction or the third direction, and the stop blocks are stop-fitted with the support plate along the first direction.

[0039] Further, the connecting piece comprises a connecting piece body and an insulating sleeve, the insulating sleeve is sleeved on the connecting piece body, and the insulating sleeve is connected with the inner wall of the first through hole and the inner wall of the second through hole respectively.

[0040] Further, the connecting piece body is provided with a first limiting part and a second limiting part, the first limiting part is limitedly matched with the stop part along the first direction, and the second limiting part is limitedly matched with the support plate along the first direction.

[0041] Further, an outer surface of the connecting piece is provided with an insulating coating layer, and / or the connecting piece is an insulator.

[0042] Further, the battery pack further comprises a flow guide piece, the flow guide piece is arranged in the exhaust hole, an inner part of the flow guide piece has an exhaust passage, the battery monomer corresponding to the exhaust hole is provided with an explosion-proof valve, and the flow guide piece surrounds the explosion-proof valve.

[0043] An insulator is arranged between the flow guide piece and the inner hole wall of the exhaust hole, and / or at least one of the flow guide piece and the support plate is an insulator.

[0044] Compared with the prior art, the battery pack and the electric equipment have the beneficial effects that: the battery pack adopts the design form of a box body, a plurality of battery monomers, a support plate, an insulating layer and a connecting piece, the box body has a containing cavity, the support plate is arranged in the containing cavity, the support plate plays a supporting role on the plurality of battery monomers, and the support plate is provided with a plurality of exhaust holes, the exhaust holes are in one-to-one correspondence with the battery monomers, and the spewing material of the battery thermal runaway can enter the space on the other side of the support plate through the exhaust holes, so that the spewed high-temperature and high-pressure material cannot cause a thermal effect on other battery monomers.

[0045] The inner side wall of the box body is provided with a stop part, the stop part is arranged protruding towards the containing cavity, the stop part is provided with a first through hole, the support plate is provided with a second through hole, the insulating layer is arranged between the support plate and the stop part, and the insulating layer is provided with a third through hole. The stop part and the support plate are limitedly matched in the containing cavity, the connecting piece is arranged in the first through hole, the third through hole and the second through hole along the first direction, the connecting piece plays a connecting and fixing role between the stop part and the support plate, and the conductive path between the support plate and the stop part is blocked by the insulating layer.

[0046] In addition, the connecting piece is insulatively connected with the inner wall of the first through hole and the inner wall of the second through hole, respectively, so that a new conductive path is prevented from being introduced due to the connecting piece between the support plate and the stop part, the integrity of the insulating design between the support plate and the box body is ensured, the support plate is prevented from being in conductive communication with the box body, and the insulating stability and the battery safety of the whole pack are improved. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is an explosion schematic view of the battery pack in the embodiment of the utility model;

[0048] Figure 2is the internal structure diagram of the box body and the supporting plate in the embodiment of the utility model;

[0049] Figure 3 is the axial section view of the battery pack in the embodiment of the utility model;

[0050] Figure 4 is the section view schematic diagram of the battery pack in the embodiment of the utility model;

[0051] Figure 5 is Figure 4 The local enlarged view of the supporting plate, the stop portion and the connecting piece;

[0052] Figure 6 is the local enlarged view of the supporting plate at the exhaust hole in the embodiment of the utility model:

[0053] Figure 7 is the internal structure diagram of the box body in other embodiments of the utility model;

[0054] In the figure: 1-box body, 10-containing cavity, 11-edge beam, 111-first edge beam, 112-second edge beam, 12-stop portion, 121-first stop piece, 122-second stop piece, 123-stop block, 13-first through hole, 14-gap, 15-first cover plate, 16-second cover plate, 2-battery monomer, 20-explosion-proof valve, 3-supporting plate, 30-exhaust hole, 31-insulating layer, 310-third through hole, 32-second through hole, 33-gel layer, 4-connecting piece, 40-connecting piece body, 401-first limiting portion, 402-second limiting portion, 41-insulating sleeve, 5-flow guide piece, 50-exhaust passage, 51-annular gap. DETAILED DESCRIPTION

[0055] The specific embodiments of the utility model are described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0056] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like in the utility model are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0059] like Figures 1 to 5 As shown, a battery pack according to an embodiment of the present invention has a first direction Z and includes: a housing 1, multiple battery cells 2, a support plate 3, an insulating layer 31, and a connector 4. The housing 1 has a receiving cavity 10, and a stop portion 12 is provided on the inner side wall of the housing 1. The stop portion 12 protrudes toward the receiving cavity 10 and has a first through hole 13 along the first direction Z. Multiple battery cells 2 are disposed in the receiving cavity 10, and the multiple battery cells 2 are spaced apart from the stop portion 12. The support plate 3 is disposed in the receiving cavity 10 and supports the multiple battery cells 2. The support plate 3 has multiple vent holes 30, and the vent holes 30 are one-to-one opposite to the battery cells 2.

[0060] The support plate 3 has a second through hole 32, which is spaced apart from the exhaust hole 30. The second through hole 32 and the first through hole 13 are arranged opposite each other along the first direction Z. An insulating layer 31 is disposed between the support plate 3 and the stop part 12. The insulating layer 31 has a third through hole 310, which is arranged opposite to the first through hole 13 along the first direction Z. A connecting member 4 passes through the first through hole 13, the third through hole 310 and the second through hole 32 to connect the stop part 12 and the support plate 3. The connecting member 4 is insulated from the inner wall of the first through hole 13 and the inner wall of the second through hole 32, respectively.

[0061] The battery pack adopts the design form of a box body 1, a plurality of battery monomers 2, a support plate 3, an insulation layer 31 and a connecting piece 4, the box body 1 has a containing cavity 10, the support plate 3 is arranged in the containing cavity 10, the plurality of battery monomers 2 are supported by the support plate 3, and the support plate 3 is provided with a plurality of exhaust holes 30, the exhaust holes 30 are opposite to the battery monomers 2 one by one, and the eruption material of the battery thermal runaway can enter the space on the other side of the support plate 3 through the exhaust holes 30, so that the high-temperature and high-pressure material erupted does not cause a thermal effect on other battery monomers 2.

[0062] The inner side wall of the box body 1 is provided with a stop portion 12, the stop portion 12 is protrudingly arranged towards the containing cavity 10, the stop portion 12 is provided with a first through hole 13, the support plate 3 is provided with a second through hole 32, the insulation layer 31 is arranged between the support plate 3 and the stop portion 12, and the insulation layer 31 is provided with a third through hole 310. The stop portion 12 and the support plate 3 are stop-fitted in the containing cavity 10, the connecting piece 4 is arranged through the first through hole 13, the third through hole 310 and the second through hole 32 along the first direction Z, the connecting piece 4 connects and fixes the stop portion 12 and the support plate 3, and the conductive path between the support plate 3 and the stop portion 12 is blocked by the insulation layer 31.

[0063] In addition, the connecting piece 4 is insulatedly connected with the inner wall of the first through hole 13 and the inner wall of the second through hole 32 respectively, so that a new conductive path is prevented from being introduced due to the connecting piece 4 between the support plate 3 and the stop portion 12, the integrity of the insulation design between the support plate 3 and the box body 1 is ensured, the support plate 3 is effectively prevented from being in conductive communication with the box body 1, and the insulation stability and the battery safety of the whole pack are improved.

[0064] In the embodiment, the battery pack also has a second direction X and a third direction Y, the first direction Z, the second direction X and the third direction Y intersect with each other; the box body 1 includes a plurality of edge beams 11, the plurality of edge beams 11 are connected to surround the containing cavity 10, and the stop portion 12 is arranged on the side wall of the edge beam 11 close to the containing cavity 10; in the second direction X and the third direction Y, the support plate 3 has a gap 14 between the side wall of the edge beam 11 close to the containing cavity 10. The gap 14 between the support plate 3 and the inner side wall of the edge beam 11 is reserved, the width of the gap 14 is the safe distance of the high-voltage breakdown air, and the conductive connection between the support plate 3 and the edge beam 11 is effectively avoided.

[0065] The edge beam 11 comprises two first edge beams 111 and two second edge beams 112, the first edge beams 111 extend along the second direction X, and the second edge beams 112 extend along the third direction Y; the two first edge beams 111 are arranged at intervals along the third direction Y, and the second edge beams 112 are connected with the two first edge beams 111 at the ends along the third direction Y respectively; the two second edge beams 112 are arranged at intervals along the second direction X, and the first edge beams 111 are connected with the two second edge beams 112 at the ends along the second direction X respectively; the stop portion 12 comprises a first stop piece 121 arranged on the first edge beam 111, the first stop piece 121 is in a strip-shaped structure, the two ends of the first stop piece 121 along the second direction X are connected with the two second edge beams 112 respectively, and the first stop piece 121 is in stop cooperation with the support plate 3 along the first direction Z. The first stop piece 121 is in a strip-shaped structure, and is arranged on the first edge beam 111 and extends along the second direction X, thereby providing a connecting fulcrum for the edge of the support plate 3 along the second direction X.

[0066] Correspondingly, the stop portion 12 further comprises a second stop piece 122 arranged on the second edge beam 112, the second stop piece 122 is in a strip-shaped structure, the two ends of the second stop piece 122 along the third direction Y are connected with the two first stop pieces 121 respectively, and the second stop piece 122 is in stop cooperation with the support plate 3 along the first direction Z. The second stop piece 122 and the first stop piece 121 are arranged around the inner side wall of the edge beam 11, thereby stably and reliably stopping the four edges of the support plate 3. In addition, the box body 1 further comprises a first cover plate 15 and a second cover plate 16 opposite along the first direction Z, and the accommodating cavity 10 is formed by the two first edge beams 111, the two second edge beams 112, the first cover plate 15 and the second cover plate 16. The side surface of the support plate 3 along the first direction Z is provided with a glue layer 33, and the glue layer 33 can be used for adhesively fixing the battery monomer 2.

[0067] As a further preferred scheme, the connecting piece 4 comprises a connecting piece body 40 and an insulating sleeve 41, the insulating sleeve 41 is sleeved on the connecting piece body 40, and the insulating sleeve 41 is connected with the inner wall of the first through hole 13 and the inner wall of the second through hole 32 respectively. By sleeving the insulating sleeve 41 on the connecting piece body 40, reliable insulation protection can be achieved between the connecting piece body 40 and the inner wall of the first through hole 13 and the inner wall of the second through hole 32.

[0068] And, the connecting member body 40 is provided with a first limiting part 401 and a second limiting part 402, the first limiting part 401 is limitedly matched with the stop part 12 along the first direction Z, and the second limiting part 402 is limitedly matched with the support plate 3 along the first direction Z.For example: the connecting member body 40 is selected as a rivet, and the first limiting part 401 and the second limiting part 402 can be rivet mushroom heads; or, the connecting member body 40 is selected as a screw, and the first limiting part 401 and the second limiting part 402 can be screw caps or nuts, etc.In addition, in other embodiments, the outer surface of the connecting member is provided with an insulating coating; and / or, the connecting member itself is an insulator, which can also play an insulating protective role similar to the insulating sleeve.

[0069] In the embodiment, the battery pack further comprises a flow guide 5, as shown in the figure, the flow guide 5 is arranged in the exhaust hole 30, the flow guide 5 has an exhaust passage 50 inside, the flow guide 5 is a high-temperature-resistant part and can withstand high-temperature and high-pressure substances sprayed during thermal runaway, preventing the flow guide 5 from being damaged by high temperature. Figure 6

[0070] The flow guide 5 surrounds the explosion-proof valve 20 and can aggregate and guide the sprayed substances to be discharged through the exhaust passage 50, preventing high-temperature and high-pressure substances from leaking from the gap between the battery monomer 2 and the support plate 3, ensuring the reliability of the flow guide effect.

[0070] The flow guide 5 surrounds the explosion-proof valve 20 and can aggregate and guide the sprayed substances to be discharged through the exhaust passage 50, preventing high-temperature and high-pressure substances from leaking from the gap between the battery monomer 2 and the support plate 3, ensuring the reliability of the flow guide effect.

[0071] In order to meet different use requirements, in other embodiments of the battery pack of the utility model, the structure design of the stop part can be adaptively adjusted, as shown in the figure, the stop part comprises a plurality of stop blocks 123, at least part of the stop blocks 123 are respectively provided with at least one first through hole 13, the plurality of stop blocks 123 are arranged on the first edge beam 111 and are arranged at intervals along the second direction X, or are arranged on the second edge beam 112 and are arranged at intervals along the third direction Y, and the stop blocks 123 are limitedly matched with the support plate 3 along the first direction Z. Figure 7

[0072] The specific embodiment of the power utilization equipment includes a battery pack, wherein the battery pack is the same as each specific embodiment of the battery pack in the above-mentioned embodiment of the utility model, and will not be repeated here.

[0073] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements and replacements can be made without departing from the technical principles of the utility model, and these improvements and replacements should also be considered as the protection range of the utility model.

Claims

1. A battery pack having a first direction (Z), characterized by, The battery pack comprises: a box (1) having a containing cavity (10), an inner side wall of the box (1) is provided with a stop portion (12) which is arranged protruding towards the containing cavity (10), the stop portion (12) is provided with a first through hole (13) along the first direction (Z); a plurality of battery monomers (2) arranged in the containing cavity (10), and the plurality of battery monomers (2) are arranged spaced apart from the stop portion (12); a support plate (3) arranged in the containing cavity (10), the support plate (3) supports the plurality of battery monomers (2), the support plate (3) is provided with a plurality of exhaust holes (30), and the exhaust holes (30) are in one-to-one correspondence with the battery monomers (2); the support plate (3) is provided with a second through hole (32), the second through hole (32) is arranged spaced apart from the exhaust holes (30), and the second through hole (32) is arranged opposite to the first through hole (13) along the first direction (Z); an insulation layer (31) arranged between the support plate (3) and the stop portion (12), the insulation layer (31) is provided with a third through hole (310), and the third through hole (310) is arranged opposite to the first through hole (13) along the first direction (Z); a connecting piece (4) penetrating through the first through hole (13), the third through hole (310) and the second through hole (32) to connect the stop portion (12) and the support plate (3), and the connecting piece (4) is insulatedly connected with the inner walls of the first through hole (13) and the second through hole (32) respectively.

2. The battery pack of claim 1, wherein, The battery pack also has a second direction (X) and a third direction (Y), and the first direction (Z), the second direction (X) and the third direction (Y) intersect with each other; The box (1) comprises a plurality of edge beams (11), the plurality of edge beams (11) are connected to surround the containing cavity (10), and the stop portion (12) is arranged on the side wall of the edge beam (11) close to the containing cavity (10); in the second direction (X) and the third direction (Y), the support plate (3) has a gap (14) between the side wall of the edge beam (11) close to the containing cavity (10).

3. The battery pack of claim 2, wherein, The edge beam (11) comprises two first edge beams (111) and two second edge beams (112), the first edge beam (111) extends along the second direction (X), and the second edge beam (112) extends along the third direction (Y); The two first edge beams (111) are arranged spaced apart along the third direction (Y), and the second edge beam (112) is connected with the two first edge beams (111) at the ends in the third direction (Y) respectively; the two second edge beams (112) are arranged spaced apart along the second direction (X), and the first edge beam (111) is connected with the two second edge beams (112) at the ends in the second direction (X) respectively; The stop portion (12) comprises a first stop piece (121) arranged on the first edge beam (111), the first stop piece (121) is in a strip-shaped structure, two ends of the first stop piece (121) along the second direction (X) are connected with two second edge beams (112) respectively, and the first stop piece (121) is in stop cooperation with the support plate (3) along the first direction (Z).

4. The battery pack of claim 3, wherein, The stop portion (12) further comprises a second stop piece (122) arranged on the second edge beam (112), the second stop piece (122) is in a strip-shaped structure, two ends of the second stop piece (122) along the third direction (Y) are connected with two first stop pieces (121) respectively, and the second stop piece (122) is in stop cooperation with the support plate (3) along the first direction (Z).

5. The battery pack of claim 2, wherein, The stop portion (12) comprises a plurality of stop blocks (123), at least part of the stop blocks (123) are respectively provided with at least one first through hole (13), and a plurality of stop blocks (123) are arranged at intervals along the second direction (X) or the third direction (Y), and the stop blocks (123) are in stop cooperation with the support plate (3) along the first direction (Z).

6. The battery pack of claim 1, wherein, The connecting piece (4) comprises a connecting piece body (40) and an insulating sleeve (41), the insulating sleeve (41) is sleeved on the connecting piece body (40), and the insulating sleeve (41) is connected with inner walls of the first through hole (13) and the second through hole (32) respectively.

7. The battery pack of claim 6, wherein, The connecting piece body (40) is provided with a first limiting portion (401) and a second limiting portion (402), the first limiting portion (401) is in limiting cooperation with the stop portion (12) along the first direction (Z), and the second limiting portion (402) is in limiting cooperation with the support plate (3) along the first direction (Z).

8. The battery pack of claim 1, wherein, An outer surface of the connecting piece (4) is provided with an insulating coating layer; and / or, the connecting piece (4) is an insulator.

9. The battery pack of claim 1, wherein, The battery pack further comprises a flow guide piece (5), the flow guide piece (5) is arranged in the exhaust hole (30), an inner portion of the flow guide piece (5) has an exhaust passage (50), the battery monomer (2) is provided with an explosion-proof valve (20) corresponding to the exhaust hole (30), and the flow guide piece (5) surrounds the explosion-proof valve (20). An insulator is arranged between the flow guide piece (5) and an inner hole wall of the exhaust hole (30), and / or at least one of the flow guide piece (5) and the support plate (3) is an insulator.

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

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