Battery monomer, battery pack and electric equipment

Abstract

The utility model provides a battery monomer, a battery pack and electric equipment, and relates to the technical field of battery related equipment, the battery monomer comprises an outer shell, the outer shell is provided with an accommodating cavity and two side walls which are mutually vertical to a first direction and are oppositely arranged; the battery cell is arranged in the accommodating cavity; the first direction is perpendicular to the side face with the largest area in the battery cell; the two ends, in the first direction, of the pole respectively penetrate through the two side walls of the outer shell, and the two ends, in the first direction, of the pole are insulated from the outer shell; the pole is provided with a mounting hole; the mounting hole is configured to accommodate a temperature control member. According to the utility model, the heating problem at the pole can be improved, heat dissipation is fast, and the heat dissipation effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of battery-related equipment, in particular to a battery monomer, a battery pack and electrical equipment. Background Art

[0002] With the rapid development of new energy technology, lithium battery technology has also developed rapidly.

[0003] The realization of battery charging and discharging functions depends on the tabs and poles on the battery. In the existing battery processing method, a large number of welding is usually performed between the tabs and poles of the battery to complete the outward lead-out of the positive and negative poles. Although a large number of welding can achieve the purpose of firmly connecting the tabs and poles, the welding parts have a large resistance, which will cause the heat generated during the operation of the battery to increase. The welding parts lack an effective heat dissipation path, which is not conducive to the heat dissipation and cooling of the battery during operation, posing a threat to the safe use of the battery. Utility Model Content

[0004] The utility model aims to provide a battery cell, a battery pack and an electric device to alleviate the technical problem of slow heat dissipation at the battery pole in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides a battery cell, comprising:

[0007] An outer shell, the outer shell having a containing cavity and two side walls which are perpendicular to the first direction and opposite to each other;

[0008] A battery cell, wherein the battery cell is arranged in the accommodating cavity; the first direction and a side surface with the largest area in the battery cell are perpendicular to each other;

[0009] A pole, wherein two ends of the pole along a first direction respectively penetrate two side walls of the outer shell, and both ends of the pole along the first direction are insulated from the outer shell; the pole is provided with a mounting hole; the mounting hole is configured to accommodate a temperature control component.

[0010] Further, the pole comprises a first conductive member and a second conductive member, wherein the first conductive member has a first connecting portion located in the accommodating cavity and an externally connected protruding portion disposed away from the first connecting portion in a first direction;

[0011] The second conductive member has a second connecting portion located in the accommodating cavity and an externally connected recessed portion disposed away from the plug-in portion in the first direction, and the first conductive member and the second conductive member are connected by plugging and fitting the first connecting portion and the second connecting portion;

[0012] The externally connected protrusion is configured to be plug-fitted with the externally connected recessed portion of another battery cell.

[0013] Further, the external protrusion has a first end surface arranged away from the second conductive member along the first direction; the mounting hole is a blind hole, and the first end surface of the external protrusion is recessed to form the mounting hole; or, the mounting hole is a through hole, and the mounting hole is arranged on the first end surface of the external protrusion, and the mounting hole passes through the first conductive member; or, the mounting hole is a through hole, and the mounting hole is arranged on the first end surface of the external protrusion, and the mounting hole passes through the pole.

[0014] The utility model also provides a battery pack, which includes a battery cell.

[0015] Further, the battery pack includes a first layer of battery monomer groups consisting of a plurality of the battery monomers and a second layer of battery monomer groups consisting of a plurality of the battery monomers, the first layer of battery monomer groups and the second layer of battery monomer groups are arranged in sequence along a first direction, and the first layer of battery monomer groups and the second layer of battery monomer groups are staggered along a second direction;

[0016] In the first direction, two adjacent battery cells are connected by plugging the first connecting portion and the second connecting portion.

[0017] Furthermore, it also includes a temperature control component, wherein the first temperature control component includes a heat-conducting shell, and a cooling medium is contained in the heat-conducting shell; the heat-conducting shell is accommodated in the installation hole of the battery cell.

[0018] Furthermore, the mounting hole of the battery cell passes through the pole; in the first direction, the heat-conducting housing passes through the mounting holes of two adjacent battery cells.

[0019] Furthermore, the battery pack further comprises a liquid cooling plate, and the second layer of battery monomer groups are arranged on the liquid cooling plate;

[0020] In the first direction, one end of each of the heat-conducting housings close to the liquid cooling plate is connected to and communicates with the liquid cooling plate, and a cooling medium is provided in the liquid cooling plate.

[0021] Furthermore, the battery pack also includes a liquid cooling component, which is arranged on a side of the first layer of battery cell groups away from the second layer of battery cell groups; in a first direction, one end of each of the heat conductive shells away from the liquid cooling plate is connected and communicated with the liquid cooling component.

[0022] The utility model also provides an electrical device, comprising a battery pack.

[0023] The utility model can achieve the following beneficial effects:

[0024] The utility model provides a battery cell, in which a mounting hole is designed on a pole so as to accommodate a temperature control component, thereby improving the heating problem at the pole, achieving fast heat dissipation and good heat dissipation effect.

[0025] The utility model provides a battery pack, in which the battery cells are designed to be placed flat, thereby reducing the overall height of the battery pack, thereby realizing the installation of the battery pack on the chassis of an automobile. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the top view of the battery cell provided in an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the internal structure of a battery cell provided by an embodiment of the utility model;

[0029] Figure 3 for Figure 1 Schematic diagram of the AA cross-section structure in the first form;

[0030] Figure 4 for Figure 1 Schematic diagram of the AA cross-section structure in the second form;

[0031] Figure 5 A schematic diagram of the cross-sectional structure of a battery cell provided by an embodiment of the utility model after being placed in a temperature control component;

[0032] Figure 6 A schematic structural diagram of a first form of an insulating member of a battery cell provided by an embodiment of the utility model;

[0033] Figure 7 A schematic structural diagram of a second form of an insulating member of a battery cell provided by an embodiment of the utility model;

[0034] Figure 8 A schematic structural diagram of a third form of an insulating member of a battery cell provided by an embodiment of the utility model;

[0035] Fig. 9 A schematic structural diagram of a fourth form of an insulating member of a battery cell provided by an embodiment of the utility model;

[0036] Fig.10 A schematic diagram of a three-dimensional structure of a first form of a battery pack provided by an embodiment of the utility model;

[0037] Fig.11 A schematic diagram of the three-dimensional structure of a second form of a battery pack provided in an embodiment of the present utility model.

[0038] Icons: 1-outer shell; 11-shell; 12-cover plate; 2-battery cell; 3-pole; 31-first conductive part; 311-mounting hole; 312-first connecting part; 313-external protrusion; 32-second conductive part; 321-second connecting part; 322-external recess; 4-insulating part; 41-bottom plate; 411-avoidance hole; 4111-spacer; 412-connection avoidance hole; 42-side plate; 421-through groove structure; 5-temperature control part; 6-liquid cooling plate; 7-liquid cooling part. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0046] Embodiment 1

[0047] This embodiment provides a battery cell, referring to Figure 1 , the battery cell comprises:

[0048] An outer shell 1, the outer shell 1 having a containing cavity and two side walls which are perpendicular to the first direction and opposite to each other;

[0049] The battery cell 2 is disposed in the accommodating cavity; the first direction and a side surface with the largest area in the battery cell 2 are perpendicular to each other;

[0050] The pole 3 has two ends along the first direction that penetrate through the two side walls of the outer shell 1 respectively, and both ends of the pole 3 along the first direction are insulated from the outer shell 1 ; the pole 3 is provided with a mounting hole 311 ; the mounting hole 311 is configured to accommodate the temperature control component 5 .

[0051] In the embodiment of the utility model, the pole 3 is designed to be provided with a mounting hole 311 so as to accommodate a temperature control component, thereby improving the heating problem at the pole, and achieving fast heat dissipation and good heat dissipation effect.

[0052] Furthermore, the outer shell 1 includes a shell 11 and a cover plate 12 . An opening is provided at one end of the shell 11 in the first direction. The cover plate 12 seals the opening of the shell 11 . The cover plate 12 and the shell 11 form a receiving cavity for receiving the battery cell 2 .

[0053] Further, the battery cell 2 is a wound battery cell or a laminated battery cell, and at least one battery cell 2 may be provided. Specifically, two battery cells 2 are provided, and the two battery cells 2 are arranged opposite to each other along the third direction, and each battery cell 2 includes a battery cell body, and two pole ears with opposite polarities extend from one end of the battery cell body in the third direction, and the two pole ears are arranged opposite to each other along the second direction, wherein the third direction and the first direction are perpendicular to each other, and the second direction and the third direction are perpendicular to each other.

[0054] In some embodiments, reference Figure 2 The pole 3 includes a first conductive member 31 and a second conductive member 32. The first conductive member 31 has a first connecting portion 312 located in the accommodating cavity and an external protrusion 313 arranged away from the first connecting portion 312 in the first direction; the second conductive member 32 has a second connecting portion 321 located in the accommodating cavity and an external recessed portion 322 arranged away from the plug-in portion in the first direction. The first conductive member 31 and the second conductive member 32 are connected by plugging and fitting the first connecting portion 312 and the second connecting portion 321; the external protrusion 313 is configured to be plug-fitted with the external recessed portion 322 of another battery cell.

[0055] In this embodiment, since the pole 3 has an external protrusion 313 and an external recess 322, two adjacent battery cells can be electrically connected by plugging the external protrusion 313 on one battery cell into the external recess 322 on the other battery cell, and the connection is quick.

[0056] It should be noted that two poles 3 are provided, the polarities of the two poles 3 are opposite, and the two poles 3 are arranged opposite to each other along the second direction.

[0057] Furthermore, the first conductive member 31 is disposed on the shell of the outer shell 1 , and the second conductive member 32 is disposed on the cover of the outer shell 1 . The first conductive member 31 and the shell of the outer shell 1 are insulated, and the second conductive member 32 and the cover of the outer shell 1 are insulated.

[0058] Specifically, a first through hole is provided on the shell of the outer shell 1, and the first conductive member 31 is passed through the first through hole, and the first conductive member 31 is connected to the shell of the outer shell 1 through a first insulating seal; a second through hole is provided on the cover plate of the outer shell 1, and the second conductive member 32 is passed through the second through hole, and the second conductive member 32 is connected to the cover plate of the outer shell 1 through a second insulating seal.

[0059] Furthermore, in the first direction, the first connection part 312 has a pole ear connection surface arranged away from the external protrusion 313; the pole ear connection surface of the first connection part 312 is recessed to form a slot, and the first connection part 312 and the second connection part 321 are connected by plugging the second connection part 321 into the slot, which is quick to connect.

[0060] It should be noted that after the first connection part 312 and the second connection part 321 are plugged into each other, in order to ensure that the first conductive member and the second conductive member are firmly connected, the first conductive member and the second conductive member are welded. Specifically, laser penetration welding is performed at the external recessed part 322 so that the bottom of the groove of the external recessed part 322 and the bottom of the groove of the slot are welded together.

[0061] Furthermore, the tab of the battery cell 2 is located between the tab connection surface of the first connection portion 312 and the side wall of the shell, and the tab of the battery cell 2 is welded to the tab connection surface of the first connection portion 312 with the same polarity.

[0062] In some embodiments, see Figure 2 , Figure 3 and Figure 4 As shown, the external protrusion 313 has a first end surface arranged away from the second conductive member 32 along the first direction; the mounting hole 311 is a blind hole, and the first end surface of the external protrusion 313 is recessed to form the mounting hole 311; or, the mounting hole 311 is a through hole, the mounting hole 311 is arranged on the first end surface of the external protrusion 313, and the mounting hole 311 passes through the first conductive member 31; or, the mounting hole 311 is a through hole, the mounting hole 311 is arranged on the first end surface of the external protrusion 313, and the mounting hole 311 passes through the pole 3.

[0063] In this embodiment, the mounting holes 311 with different structures are designed to adapt to the use of different temperature control components, so the application range is wide.

[0064] In some embodiments, reference Figure 7 The battery cell also includes an insulating member 4, which includes a bottom plate 41 and two side plates 42 connected to the bottom plate 41; the bottom plate 41 is provided with an avoidance hole 411 for the second connecting portion 321 to pass through; the two side plates 42 are arranged opposite to each other along the second direction, and an accommodation space for accommodating the first connecting portion 312 is formed between the two side plates 42; wherein, in order to connect the pole ear of the battery cell with the pole ear connecting surface on the first connecting portion 312, a through groove structure 421 for the pole ear to pass through can be provided on the side plate 42, wherein the through groove structure 421 can be a U-shaped avoidance groove.

[0065] Specifically, after the pole lug of the battery cell and the first connecting part 312 of the pole are welded, the second connecting part 321 passes through the avoidance hole 411 of the bottom plate 41, and the pole lug of the battery cell and the U-shaped avoidance groove slide together. After the second connecting part 321 and the first connecting part 312 are plugged in, the first connecting part 312 of the pole is clamped between the two side plates 42, and the bottom plate 41 covers the connection area formed by the connection between the pole lug and the pole lug connecting surface.

[0066] In some other embodiments, referring to Figure 6The bottom plate 41 of the insulating member 4 is also provided with a connection avoidance hole 412, and the connection avoidance hole 412 is directly opposite to the portion of the pole lug connected to the pole lug connection surface.

[0067] Specifically, before welding the tab of the cell and the first connection portion 312 of the pole, the first connection portion 312 of the pole is sandwiched between the two side plates 42, and the tab is placed on the tab connection surface of the first connection portion 312 through the through-slot structure; and then the tab and the first connection portion 312 are welded at the connection avoidance hole. The through-slot structure can also be an avoidance opening.

[0068] Further, see Figure 8 and Fig. 9 As shown, the insulating member 4 further includes a spacer 4111 connected to the bottom plate. The spacer 4111 is inserted into the slot of the first connecting portion 312 , and the spacer 4111 is sleeved outside the second connecting portion 321 .

[0069] Embodiment 2

[0070] A battery pack of this embodiment includes a battery cell.

[0071] In an optional implementation manner of this embodiment, refer to Fig.10 or Fig.11 The battery pack includes a first layer of battery cell groups consisting of multiple battery cells and a second layer of battery cell groups consisting of multiple battery cells. The first layer of battery cell groups and the second layer of battery cell groups are arranged in sequence along a first direction, and the first layer of battery cell groups and the second layer of battery cell groups are staggered along a second direction. In the first direction, two adjacent battery cells are connected by plugging the first connecting portion 312 and the second connecting portion 321.

[0072] In this embodiment, the battery cells are designed to lie flat, which reduces the overall height of the battery pack, thereby enabling the battery pack to be installed on the chassis of the car.

[0073] Specifically: in terms of arrangement, the first layer of battery cell groups and the second layer of battery cell groups are multiple battery cells arranged in sequence along the same direction, and the first layer of battery cell groups and the second layer of battery cell groups are staggered along the second direction; and in terms of connection, two adjacent battery cells are connected by plugging the first connecting portion 312 and the second connecting portion 321, thereby realizing the series connection of the corresponding battery cells of the first layer of battery cell groups and the second layer of battery cell groups.

[0074] In some embodiments, reference Figure 5 The battery pack further includes a temperature control component 5 , which includes a heat-conducting shell containing a cooling medium; the heat-conducting shell is accommodated in the mounting hole 311 .

[0075] In this embodiment, the temperature control element 5 is arranged in the mounting hole 311 by design, so that heat can be dissipated at the pole of the battery cell.

[0076] Among them, the cooling medium can be a liquid material or a gaseous material or a phase change material. The cooling medium being a liquid material means that the cooling medium is always liquid during the entire heat dissipation process, and the use of liquid materials as cooling media belongs to liquid cooling heat dissipation. By keeping the cooling medium within a relatively low temperature range, the heat generated at the pole is absorbed. The liquid cooling medium can be water, oil or other liquids with relatively large specific heat capacity. The cooling medium being a gaseous material means that the cooling medium is always gaseous during the entire heat dissipation process, and the use of gaseous materials as cooling media belongs to air cooling heat dissipation. The cooling medium being a phase change material means that the cooling medium will undergo phase change during the entire heat dissipation process, and the use of phase change materials as cooling media belongs to phase change heat dissipation. The phase change heat dissipation method uses the technology that absorbs or releases heat when the phase of a substance changes. For example, when water changes from liquid to gas, it can absorb a large amount of heat with almost no temperature change, thereby achieving a very good cooling effect.

[0077] It should be noted that in order to ensure the insulation setting of the temperature control component and the pole, the heat-conducting shell can be designed to be made of insulating material with high thermal conductivity. In order to ensure the contact between the temperature control component and the pole, the heat-conducting shell and the mounting hole can be designed to be plug-in and interference fit. Of course, the heat-conducting shell and the mounting hole can also be designed to be threadedly connected.

[0078] It should also be noted that the heat-conducting housing can be designed as a closed structure or as an open structure.

[0079] Further, refer to Fig.10 or Fig.11 The mounting hole 311 of the battery cell is designed to penetrate the pole 3; in the first direction, the heat-conducting housing penetrates the mounting holes of two adjacent battery cells.

[0080] Specifically: a temperature control component is designed to penetrate two adjacent battery cells along a first direction, which not only makes the temperature control component easier to install, but also serves to position the first layer of battery cell groups and the second layer of battery cell groups, thereby facilitating the arrangement of the battery cells.

[0081] Further, refer to Fig.10 or Fig.11 The battery pack also includes a liquid cooling plate 6, and the second layer of battery monomer groups is arranged on the liquid cooling plate 6; in the first direction, one end of each heat-conducting shell close to the liquid cooling plate 6 is connected and communicated with the liquid cooling plate 6, and a coolant is arranged in the liquid cooling plate 6.

[0082] In this embodiment, the liquid cooling plate 6 is designed to dissipate heat from the battery cells, and the liquid cooling plate 6 and the heat-conducting shell are designed to be connected and communicated, which on the one hand provides the possibility for circulating cooling, and on the other hand can position the first layer of battery cell groups and the second layer of battery cell groups, facilitating the arrangement of the battery cells.

[0083] Further, refer to Fig.11 The battery pack also includes a liquid cooling member 7, which is arranged on a side of the first layer of battery monomer groups away from the second layer of battery monomer groups; in the first direction, one end of each heat-conducting shell away from the liquid cooling plate 6 is connected and communicated with the liquid cooling member 7.

[0084] In this embodiment, the cooling medium enters into each heat-conducting housing through the liquid cooling member 7 and then enters into the liquid cooling plate 6, providing a basis for circulating cooling.

[0085] Embodiment 3

[0086] An electric device according to this embodiment includes a battery pack.

[0087] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery cell, characterized in that: include: An outer shell (1), the outer shell (1) comprising a containing cavity and two side walls which are perpendicular to the first direction and arranged opposite to each other; A battery cell (2), the battery cell (2) being arranged in the accommodating cavity; the first direction and a side surface with the largest area in the battery cell (2) being perpendicular to each other; A pole (3), wherein two ends of the pole (3) along a first direction respectively penetrate two side walls of the outer shell (1), and both ends of the pole (3) along the first direction are insulated from the outer shell (1); the pole (3) is provided with a mounting hole (311); the mounting hole (311) is configured to accommodate a temperature control component (5).

2. The battery cell according to claim 1, characterized in that: The pole (3) comprises a first conductive member (31) and a second conductive member (32); the first conductive member (31) has a first connecting portion (312) located in the accommodating cavity and an externally connected protruding portion (313) disposed away from the first connecting portion (312) in a first direction; The second conductive member (32) has a second connecting portion (321) located in the accommodating cavity and an externally connected recessed portion (322) disposed away from the plug-in portion in a first direction, and the first conductive member (31) and the second conductive member (32) are connected by plugging and fitting the first connecting portion (312) and the second connecting portion (321); The externally connected protruding portion (313) is configured to be plug-fitted with the externally connected recessed portion (322) of another battery cell.

3. The battery cell according to claim 2, characterized in that: The externally connected protrusion (313) has a first end face arranged away from the second conductive member (32) along the first direction; the mounting hole (311) is a blind hole, and the first end face of the externally connected protrusion (313) is recessed to form the mounting hole (311); or, the mounting hole (311) is a through hole, and the mounting hole (311) is arranged on the first end face of the externally connected protrusion (313), and the mounting hole (311) passes through the first conductive member (31); or, the mounting hole (311) is a through hole, and the mounting hole (311) is arranged on the first end face of the externally connected protrusion (313), and the mounting hole (311) passes through the pole (3).

4. A battery pack, characterized in that: A battery cell comprising the battery cell according to any one of claims 1 to 3.

5. The battery pack according to claim 4, characterized in that: The battery cell group comprises a first layer of battery cells formed by a plurality of the battery cells and a second layer of battery cell groups formed by a plurality of the battery cells, wherein the first layer of battery cell groups and the second layer of battery cell groups are sequentially arranged along a first direction, and the first layer of battery cell groups and the second layer of battery cell groups are staggered along a second direction; In the first direction, two adjacently arranged battery cells are connected by plugging the first connecting portion (312) and the second connecting portion (321).

6. The battery pack according to claim 5, characterized in that: It also includes a temperature control component (5), the temperature control component (5) including a heat-conducting shell, the heat-conducting shell containing a cooling medium; the heat-conducting shell is accommodated in the installation hole (311) of the battery cell.

7. The battery pack according to claim 6, characterized in that: The mounting hole (311) of the battery cell passes through the pole (3); in a first direction, the heat-conducting housing passes through the mounting holes (311) of two adjacently arranged battery cells.

8. The battery pack according to claim 7, characterized in that: The battery pack further comprises a liquid cooling plate (6), and the second layer of battery monomer groups is arranged on the liquid cooling plate (6); In the first direction, one end of each heat-conducting housing close to the liquid cooling plate (6) is connected to and communicates with the liquid cooling plate (6), and a cooling medium is provided in the liquid cooling plate (6).

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises a liquid cooling element (7), wherein the liquid cooling element (7) is arranged on a side of the first layer of battery monomer groups away from the second layer of battery monomer groups; in a first direction, one end of each of the heat-conducting housings away from the liquid cooling plate (6) is connected to and communicates with the liquid cooling element (7).

10. An electrical device, characterized in that: A battery pack comprising any one of claims 5 to 9.

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