Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack which comprises a box body, a first battery layer and a second battery layer, a partition plate assembly is arranged in the box body, and the partition plate assembly divides the space in the box body into a first containing space and a second containing space which are arranged in the vertical direction; the first battery layer is arranged in the first accommodating space and comprises a plurality of first single batteries, a first conductive bar and a first conductive output part; and the second battery layer is arranged in the second accommodating space and comprises a plurality of second single batteries, a second conductive bar and a second conductive output part.

Description

Technical Field

[0001] The present disclosure relates to the technical field of batteries, and more particularly, to a battery pack. Background Art

[0002] In an electric vehicle, a battery pack is often provided, and the battery pack is used to provide power to the electric vehicle. A plurality of single cells are arranged in the battery pack, and the plurality of single cells are electrically connected through conductive bars. An explosion-proof valve is arranged on the single cell, and the explosion-proof valve explodes after the single cell is out of thermal control to relieve pressure on the single cell. After the explosion-proof valve explodes, the liquid in the single cell will spray out, and the sprayed gas and liquid have the characteristics of high temperature and high pressure. Therefore, the liquid sprayed out when the explosion-proof valve explodes is likely to damage the conductive bar.

[0003] It should be noted that the information disclosed in the above background art is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a battery pack and an electrical device, so as to at least to a certain extent protect the conductive bar in the battery pack.

[0005] According to one aspect of the present disclosure, a battery pack is provided, and the battery pack includes:

[0006] A box body, in which a partition assembly is arranged, and the partition assembly divides the box body into a first accommodation space and a second accommodation space arranged in the vertical direction;

[0007] A first battery layer, which is arranged in the first accommodation space. The first battery layer includes a plurality of first single cells, a first conductive bar and a first conductive output part. An explosion-proof valve is arranged at one end of the first single cell facing the partition. The first conductive bar connects the plurality of first batteries, and the first conductive bar is not arranged on the side of the first battery where the explosion-proof valve is arranged. The first conductive output part is connected to the first conductive bar, and the first conductive output part is located at the side of the first battery layer. The side of the first battery layer is located between two relatively arranged ends, and one end of the first battery layer faces the partition assembly;

[0008] A second battery layer is provided in the second accommodation space. The second battery layer includes a plurality of second single cells, a second conductive busbar, and a second conductive output portion. An explosion-proof valve is provided at one end of the second single cell facing the partition. The second conductive busbar connects a plurality of the second batteries, and the second conductive busbar is not provided on the side of the second battery where the explosion-proof valve is provided. The second conductive output portion is connected to the second conductive busbar, and the second conductive output portion is located at a side portion of the second battery layer. The side portion of the second battery layer is located between two relatively arranged end portions. One end portion of the second battery layer faces the partition assembly, and the first conductive output portion is connected to the second conductive output portion.

[0009] According to another aspect of the present disclosure, an electrical device is provided, and the electrical device includes the above battery pack.

[0010] The battery pack provided by the embodiments of the present disclosure includes a first battery layer and a second battery layer. The first battery layer includes a plurality of first single cells and a first conductive busbar, and the first conductive busbar is not provided on the side of the first single cell where the explosion-proof valve is provided. The second battery layer includes a plurality of second single cells and a second conductive busbar, and the second conductive busbar is not provided on the side of the second single cell where the explosion-proof valve is provided, realizing the separation of the explosion-proof valve and the conductive busbar of the single cell. Further, when a single cell undergoes thermal runaway, the ejected liquid cannot directly spray on the conductive busbar, thereby protecting the conductive busbar. Further, a first conductive output portion is provided at a side portion of the first battery layer, and a second conductive output portion is provided at a side portion of the second battery layer. The first conductive output portion is connected to the second conductive output portion. On the one hand, the electrical connection between the first battery layer and the second battery layer is realized. On the other hand, the problem that the length of the lead-out end of the conductive busbar is too long due to the stacked arrangement of the first battery layer and the second battery layer in the vertical direction inside the box, affecting the electrical connection stability of the battery pack, is solved.

[0011] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings without creative efforts based on these drawings.

[0013] Figure 1 FIG. is a schematic structural diagram of a battery pack provided by an exemplary embodiment of the present disclosure;

[0014] Figure 2 A schematic structural diagram of a single battery provided by an exemplary embodiment of the present disclosure.

[0015] Description of reference numerals:

[0016] 10. Box body; 11. Bottom plate; 12. Frame; 21. First battery layer; 211. First single battery; 212. First conductive row; 213. First conductive output part; 22. Second battery layer; 221. Second single battery; 222. Second conductive row; 223. Second conductive output part; 30. Partition assembly; 31. First partition; 311. First groove; 32. Second partition;

[0017] 20. Single battery; 201. Battery housing; 202. Battery cell; 203. Terminal post; 204. Explosion-proof valve. Detailed implementation manners

[0018] Next, the technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the protection scope of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the protection scope of the present disclosure.

[0019] In the description of the present disclosure, unless otherwise clearly defined and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "plurality" means two or more; the term "and / or" includes any combination and all combinations of one or more of the associated listed items. In particular, referring to "the / said" object or "one" object also intends to represent one of the possible multiple such objects.

[0020] Unless otherwise specified or described, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0021] Further, in the description of the present disclosure, it should be understood that the orientation terms such as "upper", "lower", "inner", and "outer" described in the exemplary embodiments of the present disclosure are described from the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It should also be understood that in the context, when it is mentioned that an element or feature is connected "above", "below", or "inside", "outside" another element (one or more), it can not only be directly connected "above", "below", or "inside", "outside" another element (one or more), but also be indirectly connected "above", "below", or "inside", "outside" another element (one or more) through an intermediate element.

[0022] An exemplary embodiment of the present disclosure provides a battery pack, as Figure 1 and Figure 2 shown. The battery pack includes a box body 10, a first battery layer 21, and a second battery layer 22. A partition assembly 30 is disposed in the box body 10. The partition assembly 30 divides the space in the box body 10 into a first accommodation space and a second accommodation space arranged in the vertical direction. The first battery layer 21 is disposed in the first accommodation space. The first battery layer 21 includes a plurality of first single cells 211, a first conductive bus 212, and a first conductive output portion 213. An explosion-proof valve 204 is provided at one end of the first single cell 211 facing the partition. The first conductive bus 212 connects a plurality of first batteries, and the first conductive bus 212 is not disposed on the side where the first battery is provided with the explosion-proof valve 204. The first conductive output portion 213 is connected to the first conductive bus 212, and the first conductive output portion 213 is located at the side of the first battery layer 21. The side of the first battery layer 21 is located between two relatively arranged ends, and one end of the first battery layer 21 faces the partition assembly 30. The second battery layer 22 is disposed in the second accommodation space. The second battery layer 22 includes a plurality of second single cells 221, a second conductive bus 222, and a second conductive output portion 223. An explosion-proof valve 204 is provided at one end of the second single cell 221 facing the partition. The second conductive bus 222 connects a plurality of second batteries, and the second conductive bus 222 is not disposed on the side where the second battery is provided with the explosion-proof valve 204. The second conductive output portion 223 is connected to the second conductive bus 222, and the second conductive output portion 223 is located at the side of the second battery layer 22. The side of the second battery layer 22 is located between two relatively arranged ends, and one end of the second battery layer 22 faces the partition assembly 30. The first conductive output portion 213 is connected to the second conductive output portion 223.

[0023] The battery pack provided by the embodiment of the present disclosure includes a first battery layer 21 and a second battery layer 22. The first battery layer 21 includes a plurality of first single cells 211 and a first conductive bar 212. The first conductive bar 212 is not disposed on the side of the first single cell 211 where the explosion-proof valve 204 is provided. The second battery layer 22 includes a plurality of second single cells 221 and a second conductive bar 222. The second conductive bar 222 is not disposed on the side of the second single cell 221 where the explosion-proof valve 204 is provided. This realizes the separation of the explosion-proof valve 204 and the conductive bar of the single cell 20, and further can avoid the liquid ejected when the single cell 20 is out of thermal control from directly spraying on the conductive bar, thereby protecting the conductive bar. Further, a first conductive output portion 213 is provided on the side of the first battery layer 21, and a second conductive output portion 223 is provided on the side of the second battery layer 22. The first conductive output portion 213 and the second conductive output portion 223 are connected. On the one hand, the electrical connection between the first battery layer 21 and the second battery layer 22 is realized. On the other hand, the problem that the stacked arrangement of the first battery layer 21 and the second battery layer 22 in the vertical direction in the box body 10 results in a large size of the battery pack in the height direction and a too long length of the lead-out end of the conductive bar, which affects the electrical connection stability of the battery pack is solved.

[0024] The following will detail each part of the battery pack provided by the embodiment of the present disclosure:

[0025] A partition assembly 30 is provided in the box body 10. The partition assembly 30 divides the space in the box body 10 into a first accommodation space and a second accommodation space arranged in the vertical direction. The first space is used to accommodate the first battery layer 21, and the second accommodation space is used to accommodate the second battery layer 22.

[0026] Wherein, the box body 10 may include a bottom edge and a frame 12. The frame 12 is connected to the bottom plate 11 to form a battery compartment. The partition assembly 30 is disposed in the battery compartment, and the partition assembly 30 divides the battery compartment into a first accommodation space and a second accommodation space. The partition assembly 30 may be arranged parallel to the bottom plate 11, and there is a gap between the partition assembly 30 and the bottom plate 11. A first accommodation space is formed between the partition assembly 30 and the bottom plate 11, and a second accommodation space is formed on the side of the partition assembly 30 facing away from the bottom plate 11.

[0027] The partition assembly 30 may include a first partition 31 and a second partition 32. The first single cell 211 is opposite to (abuts against) the first partition 31, and the second single cell 221 is opposite to (abuts against) the second partition 32. There is a gap between the first partition 31 and the second partition 32, and the gap between the first partition 31 and the second partition 32 can serve as a pressure relief channel for the battery pack. For example, the space between the first partition 31 and the second partition 32 communicates with the pressure relief channel within the frame 12 of the housing 10. By setting the partition assembly 30 into two upper and lower parts, it is convenient for assembling the battery pack, and the pressure relief space can be determined according to requirements, which is convenient for operation.

[0028] The first battery layer 21 includes a plurality of first single cells 211, a first conductive busbar 212, and a first conductive output portion 213. An explosion-proof valve 204 is provided at one end of the first single cell 211 facing the partition. The first conductive busbar 212 connects the plurality of first batteries, and the first conductive busbar 212 is not provided on the side of the first battery where the explosion-proof valve 204 is provided. The first conductive output portion 213 is connected to the first conductive busbar 212, and the first conductive output portion 213 is located at the side of the first battery layer 21.

[0029] Among them, the plurality of first single cells 211 in the first battery layer 21 may be arranged in an array, and the plurality of first single cells 211 are aligned (the bottom surfaces and top surfaces of the plurality of first single cells 211 are all aligned). The first conductive busbar 212 electrically connects the electrode posts 203 of the plurality of first single cells 211. For example, the plurality of first single cells 211 are connected in series through the first conductive busbar 212, or the plurality of first single cells 211 are connected in parallel through the first conductive busbar 212.

[0030] The first single cell 211 has a top end and a bottom end arranged oppositely, and a side surface located between the top end and the bottom end. The bottom end of the first single cell 211 faces the partition assembly 30. The explosion-proof valve 204 is provided at the bottom end of the first single cell 211, and the first conductive busbar 212 is provided on the side surface of the first single cell 211, or the first conductive busbar 212 is provided on the top surface of the first single cell 211. The first conductive busbar 212 includes a plurality of busbars. For example, one busbar connects two or more adjacent first single cells 211.

[0031] The first conductive output portion 213 serves as the lead-out end of the first battery layer 21 and is connected to the first conductive busbar 212. For example, the first conductive output portion 213 and the first conductive busbar 212 can be connected by welding, riveting, or bolting. Or the first conductive output portion 213 and the first conductive busbar 212 are of an integrally formed structure, and the first conductive busbar 212 and the first conductive output portion 213 are formed by bending.

[0032] The first battery layer 21 has a top surface and a bottom surface that are oppositely arranged, and a side surface located between the top surface and the bottom surface. The surface of the first battery layer 21 close to the partition assembly 30 is the bottom surface, and the surface of the first battery layer 21 facing away from the partition assembly 30 is the top surface. The first conductive output portion 213 is located at the side of the first battery layer 21. That is, the first conductive output portion 213 and the side surface of the first battery layer 21 are oppositely arranged.

[0033] The second battery layer 22 is disposed in the second accommodation space. The second battery layer 22 includes a plurality of second single batteries 221, a second conductive bus 222, and a second conductive output portion 223. An explosion-proof valve 204 is provided at one end of the second single battery 221 facing the partition. The second conductive bus 222 connects a plurality of second batteries, and the second conductive bus 222 is not provided on the side of the second battery where the explosion-proof valve 204 is provided. The second conductive output portion 223 is connected to the second conductive bus 222, and the second conductive output portion 223 is located at the side of the second battery layer 22. The first conductive output portion 213 is connected to the second conductive output portion 223.

[0034] Among them, the plurality of second single batteries 221 in the second battery layer 22 can be arranged in an array, and the plurality of second single batteries 221 are aligned (the bottom surfaces and the top surfaces of the plurality of second single batteries 221 are all aligned). The second conductive bus 222 electrically connects the electrode posts 203 of the plurality of second single batteries 221. For example, the plurality of second single batteries 221 are connected in series through the second conductive bus 222, or the plurality of second single batteries 221 are connected in parallel through the second conductive bus 222.

[0035] The second single battery 221 has a top end and a bottom end that are oppositely arranged, and a side surface located between the top end and the bottom end. The bottom end of the second single battery 221 faces the partition assembly 30. The explosion-proof valve 204 is provided at the bottom end of the second single battery 221. The second conductive bus 222 is provided on the side surface of the second single battery 221, or the second conductive bus 222 is provided on the top surface of the second single battery 221. The second conductive bus 222 includes a plurality of busbars. For example, one busbar connects two or more adjacent second single batteries 221.

[0036] The second conductive output portion 223 serves as the lead-out end of the second battery layer 22 and is connected to the second conductive bus 222. For example, the second conductive output portion 223 and the second conductive bus 222 can be welded, riveted, or bolted. Or the second conductive output portion 223 and the second conductive bus 222 are an integrally formed structure, and the second conductive bus 222 and the second conductive output portion 223 are formed by bending.

[0037] The second battery layer 22 has a top surface and a bottom surface that are oppositely arranged, and side surfaces located between the top surface and the bottom surface. The surface of the second battery layer 22 close to the partition assembly 30 is the bottom surface, and the surface of the second battery layer 22 facing away from the partition assembly 30 is the top surface. The second conductive output portion 223 is located at the side portion of the second battery layer 22, that is, the second conductive output portion 223 and the side surface of the second battery layer 22 are oppositely arranged.

[0038] In a feasible implementation manner, the first conductive row 212 is provided at one end of the first battery layer 21 facing away from the partition assembly 30, and the second conductive row 222 is provided at one end of the second battery layer 22 facing away from the partition assembly 30. Through the bottom outlet of the explosion-proof valve 204, the conductive row is arranged away from the explosion-proof valve 204 to prevent the thermal runaway of the single battery 20 from affecting the electrical connection between the batteries.

[0039] The orthographic projection of the explosion-proof valve 204 of the first single battery 211 on the partition assembly 30 forms a first projection area, and the orthographic projection of the explosion-proof valve 204 of the second single battery 221 on the partition assembly 30 forms a second projection area. The first projection area and the second projection area partially overlap (the first projection area and the second projection area do not partially overlap).

[0040] The explosion-proof valves 204 of the first battery cell and the second single battery 221 are oppositely arranged, which can enable the upper and lower layers of single batteries 20 to share the exhaust space of a single battery pack. The pressure relief space is concentrated, improving the utilization rate of the box body 10. The explosion-proof valves 204 of the upper and lower layers of batteries are arranged in a staggered manner to prevent the explosion of one side from affecting the single battery 20 on the other side. The incomplete opposition can reduce the impact on other battery cells.

[0041] The overlapping area of the first projection area and the second projection area is M1, and the area of the first projection area is M (it can also be the area of the second projection area. In practical applications, the explosion-proof valve areas of the first single battery and the second single battery are the same), 0 < M1 / M ≤ 0.5. By setting M1 / M to 0 - 0.5. On the one hand, it can reduce the impact of the thermal runaway of the single battery 20 on the single battery 20 on the opposite side, and on the other hand, it also takes into account the utilization rate of the space inside the battery pack (although completely staggering can maximize the avoidance of influence, it will reduce the volume utilization rate of the battery pack).

[0042] The thickness of the partition assembly 30 is 5 mm - 20 mm. The thickness of the partition assembly 30 is the dimension of the partition assembly in the Z direction. When the overlapping area ratio of the explosion-proof valves of the first battery layer 21 and the second battery layer 22 is larger, and in the case where the explosion-proof valve can break through, the thickness of the partition assembly 30 needs to be thickened. By setting the thickness of the partition assembly 30 to 5 mm - 20 mm, it can prevent the explosion-proof valve of the single battery on the opposite side from being affected by the spraying valve.

[0043] One side of the partition assembly 30 facing the first battery layer 21 is provided with a first groove 311, and at least a part of the first single battery 211 is located in the first groove 311; one side of the partition assembly 30 facing the second battery layer 22 is provided with a second groove, and at least a part of the second single battery 221 is located in the second groove. By providing the first groove 311 and the second groove on the two sides of the partition assembly 30 respectively, it is convenient for positioning the single battery 20 when assembling it into the box, and the production efficiency of the battery pack is improved.

[0044] Wherein, when the partition assembly 30 includes a first partition 31 and a second partition 32, the first groove 311 is provided on the first partition 31, and at least a part of the first single battery 211 is embedded in the first partition 31. The second groove is provided on the second partition 32, and at least a part of the second single battery 221 is embedded in the second partition 32.

[0045] The first single battery 211 is bonded to the first groove 311 through a connecting adhesive, and the second single battery 221 is bonded to the second groove through a connecting adhesive. When assembling the single battery 20 into the box, the first single battery 211 and the first partition 31 can be bonded first, and the second single battery 221 and the second partition 32 can be bonded, realizing the pre-fixation of the single battery 20 and facilitating the assembly of the single battery 20 into the box.

[0046] It should be noted that when the thickness of the first partition 31 is uneven, h1 refers to the thickness of the positive projection area of the first single battery 211 on the first partition 31. When the explosion-proof valve 204 on the first single battery 211 is a notch, S1 is the area of the region surrounded by the notch. When the thickness of the second partition 32 is uneven, h2 refers to the thickness of the positive projection area of the second single battery 221 on the second partition 32. When the explosion-proof valve 204 on the second single battery 221 is a notch, S2 is the area of the region surrounded by the notch.

[0047] In the embodiments of the present disclosure, the first single battery 211 and the second single battery 221 are only named for convenience of description, and do not mean that the first single battery 211 and the second single battery 221 are different. That is, both the first single battery 211 and the second single battery 221 are ordinary single batteries 20.

[0048] The single battery 20 may include a battery case 201, an electric core 202 and a pole column 203. The battery case 201 is used to form the outer contour of the single battery 20 and protect the components inside the battery case 201. A receiving space is provided inside the battery case 201, the electric core 202 is arranged in the receiving space, the pole column 203 is arranged on the battery case 201, and the pole column 203 is connected to the electric core 202.

[0049] The battery housing 201 may include a housing body and a cover plate. One end of the housing body has an opening, and the cover plate is connected to the opening of the housing body. The housing body may include a bottom plate 11 and a side frame. The bottom plate 11 and the cover plate are arranged opposite to each other. The side frame is in the shape of a cylindrical structure with openings at both ends, and the bottom plate 11 and the cover plate are respectively connected to both ends of the cylindrical structure.

[0050] The cover plate and the side frame are of a split molding structure, and the cover plate and the side frame can be connected by means such as welding, riveting or adhesive connection. The bottom plate 11 and the side frame can be of an integral molding structure or a split molding structure. When the bottom plate 11 and the side frame are of an integral molding structure, the housing body can be formed by means such as stamping or casting. When the bottom plate 11 and the side frame are of a split molding structure, the housing body can be formed by means such as welding, riveting or adhesive connection.

[0051] The battery cell 202 is disposed inside the battery housing 201. The battery cell 202 is connected to the pole post 203, and the battery cell 202 is immersed in the electrolyte. The battery cell 202 includes a battery cell body and a tab. The tab extends from the battery cell body; there are two tabs on the battery cell body, and the two tabs are respectively a first tab (positive tab) and a second tab (negative tab), and the first tab and the second tab can be respectively connected to corresponding adapter parts.

[0052] It should be noted that the battery cell body may include more than two electrode plates, the tab includes more than two single-piece tabs, the single-piece tabs respectively extend from the electrode plates corresponding to them, the width of the single-piece tab is smaller than the width of the electrode plate, and multiple single-piece tabs are stacked to form the tab.

[0053] In one embodiment, the battery is a stacked battery, which is not only convenient for grouping but also can be processed into a battery with a longer length. The battery cell 202 is a stacked battery cell, and the battery cell 202 has a first electrode plate, a second electrode plate having an opposite electrical property to the first electrode plate, and a separator disposed between the first electrode plate and the second electrode plate, so that multiple pairs of first electrode plates and second electrode plates are stacked to form the stacked battery cell.

[0054] Optionally, the battery cell 202 can be a wound battery cell, that is, the first electrode plate, the second electrode plate having an opposite electrical property to the first electrode plate, and the separator disposed between the first electrode plate and the second electrode plate are wound to obtain the wound battery cell.

[0055] In the embodiments of the present disclosure, the first single battery 211 and the second single battery 221 are both cylindrical batteries. The axis of the first single battery 211 is arranged in the vertical direction, and the axis of the second single battery 221 is arranged in the vertical direction. That is, multiple single batteries 20 are arranged in two vertical layers. The arrangement of the single batteries 20 in two vertical layers can effectively save the size of the battery pack in the non-height direction, which is beneficial to the flexible layout of the battery pack in an electric vehicle.

[0056] It can be understood that in some other embodiments, the single cell 20 may also be a prismatic cell. The prismatic cell may include a first terminal 203 and a second terminal 203, the first terminal 203 and the second terminal 203 are respectively disposed on the surface of the cell housing 201, and the first terminal 203 and the second terminal 203 are respectively connected to the cell core 202.

[0057] The battery pack provided by the embodiments of the present disclosure includes a first battery layer 21 and a second battery layer 22. The first battery layer 21 includes a plurality of first single cells 211 and a first conductive bar 212. The first conductive bar 212 is not disposed on the side of the first single cell 211 where the explosion-proof valve 204 is provided. The second battery layer 22 includes a plurality of second single cells 221 and a second conductive bar 222. The second conductive bar 222 is not disposed on the side of the second single cell 221 where the explosion-proof valve 204 is provided, realizing the separation of the explosion-proof valve 204 and the conductive bar of the single cell 20. Further, when the single cell 20 is out of thermal control, the ejected liquid is prevented from directly spraying on the conductive bar, thereby protecting the conductive bar. Further, a first conductive output portion 213 is disposed on the side portion of the first battery layer 21, and a second conductive output portion 223 is disposed on the side portion of the second battery layer 22. The first conductive output portion 213 and the second conductive output portion 223 are connected. On the one hand, the electrical connection between the first battery layer 21 and the second battery layer 22 is realized. On the other hand, the problem that the first battery layer 21 and the second battery layer 22 are stacked in the vertical direction in the box body 10, resulting in too long a length of the lead-out end of the conductive bar and affecting the electrical connection stability of the battery pack is solved.

[0058] The battery pack provided by the embodiments of the present disclosure can be applied to an electric vehicle. The battery pack is installed on the electric vehicle to provide energy for the electric vehicle. In practical applications, the battery pack can be installed on the frame of the electric vehicle. The battery pack can be fixedly connected to the frame. Or the battery pack can be a modular battery pack, and the modular battery pack can be detachably connected to the vehicle body for easy replacement.

[0059] The exemplary embodiment of the present disclosure further provides an electrical device, and the electrical device includes a battery pack. The electrical device can be an electric vehicle or an energy storage station, etc.

[0060] Those skilled in the art will readily think of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A battery pack, characterized in that: The battery pack comprises: A box body, wherein a partition assembly is disposed in the box body, and the partition assembly divides the space in the box body into a first accommodating space and a second accommodating space arranged in a vertical direction; a first battery layer, the first battery layer is arranged in the first accommodating space, the first battery layer comprises a plurality of first single batteries, a first conductive bar and a first conductive output part, an explosion-proof valve is arranged at one end of the first single battery facing the partition, the first conductive bar connects the plurality of first batteries, and the first conductive bar is not arranged at the side of the first battery where the explosion-proof valve is arranged, the first conductive output part is connected to the first conductive bar, and the first conductive output part is located at a side of the first battery layer, the side of the first battery layer is located between two oppositely arranged ends, and one end of the first battery layer is opposite to the partition assembly; A second battery layer, the second battery layer is arranged in the second accommodating space, the second battery layer includes a plurality of second single cells, a second conductive bar and a second conductive output part, an explosion-proof valve is arranged at one end of the second single cell facing the partition, the second conductive bar connects a plurality of the second cells, and the second conductive bar is not arranged on the side of the second cell where the explosion-proof valve is arranged, the second conductive output part is connected to the second conductive bar, and the second conductive output part is located at a side of the second battery layer, the side of the second battery layer is located between two oppositely arranged ends, one end of the second battery layer is opposite to the partition assembly, and the first conductive output part is connected to the second conductive output part.

2. The battery pack according to claim 1, characterized in that: The first conductive row is disposed at one end of the first battery layer away from the separator assembly, and the second conductive row is disposed at one end of the second battery layer away from the separator assembly.

3. The battery pack according to claim 1, wherein: The orthographic projection of the explosion-proof valve of the first single cell on the partition assembly forms a first projection area, and the orthographic projection of the explosion-proof valve of the second single cell on the partition assembly forms a second projection area, and the first projection area and the second projection area partially overlap.

4. The battery pack according to claim 3, characterized in that: The overlapping area of ​​the first projection area and the second projection area is M1, and the area of ​​the first projection area is M, <M1 / M≤0.5。 5. The battery pack according to claim 4, characterized in that: The thickness of the partition assembly is 5mm-20mm.

6. The battery pack according to claim 1, wherein: A first groove is provided on a side of the separator assembly facing the first battery layer, and the first single battery is at least partially located in the first groove; A second groove is disposed on a side of the separator assembly facing the second battery layer, and the second single battery is at least partially located in the second groove.

7. The battery pack according to claim 6, characterized in that: The first single cell is bonded to the first groove by a connecting glue, and the second single cell is bonded to the second groove by a connecting glue.

8. The battery pack according to claim 1, wherein: The partition assembly comprises: a first separator, the first separator abutting against the first single battery; The second separator is in contact with the second unit battery, and a gap is provided between the first separator and the second separator.

9. The battery pack according to any one of claims 1 to 8, characterized in that: The first single cell is a cylindrical cell, and the axis of the first single cell is arranged along the vertical direction; the second single cell is a cylindrical cell, and the axis of the first single cell is arranged along the vertical direction.

10. An electrical device, characterized in that: The electrical equipment comprises the battery pack according to any one of claims 1-9.

Images