CN220172221U - Battery pack and electric equipment - Google Patents

Abstract

The utility model discloses a battery pack and electric equipment. The battery cell assembly is arranged in the shell. The battery cell assembly comprises battery cell units, each battery cell unit comprises a battery cell, a first heat conduction piece and a second heat conduction piece, and the first heat conduction piece and the second heat conduction piece form an accommodating space. The battery cell comprises a battery cell shell and an electrode terminal, wherein the battery cell shell comprises a main body part and a first sealing part, and the electrode terminal extends out of the battery cell shell from the first sealing part. The main body part is arranged in the accommodating space, and the first sealing part is arranged outside the accommodating space. The heat dissipation piece is located in the shell, and heat dissipation piece and electric core subassembly are arranged in first direction, and along first direction, part of first heat conduction piece is located between heat dissipation piece and the electric core casing, and part of second heat conduction piece is located between heat dissipation piece and the electric core casing, and the shell is connected to the heat dissipation piece, and first heat conduction piece and second heat conduction piece are connected to the heat dissipation piece. The utility model is beneficial to improving the heat dissipation efficiency.

Description

Battery pack and electric equipment

Technical Field

The utility model relates to the technical field of energy storage, in particular to a battery pack and electric equipment.

Background

At present, the battery pack is widely applied to the fields of unmanned aerial vehicles, electric vehicles, intelligent energy storage equipment and the like. When the battery pack is used, the battery cell can emit a large amount of heat, so that the battery pack is required to be cooled in order to avoid overhigh temperature of the battery pack, and the traditional cooling mode is low in cooling speed and limited in cooling of the battery cell.

Disclosure of Invention

In view of the foregoing, it is necessary to provide a battery pack and an electric device that can improve heat dissipation efficiency.

Embodiments of the present utility model provide a battery pack including a housing, a cell assembly, and a heat sink. The battery cell assembly is arranged in the shell and comprises battery cell units, each battery cell unit comprises a battery cell, a first heat conduction piece and a second heat conduction piece, and the first heat conduction piece and the second heat conduction piece form an accommodating space. The battery cell comprises a battery cell shell, an electrode assembly and an electrode terminal, wherein the electrode terminal is connected to the electrode assembly and led out from the battery cell shell; the main body part is arranged in the accommodating space, and the sealing part is arranged outside the accommodating space. The heat dissipation piece is located in the shell, and heat dissipation piece and electric core subassembly are arranged in first direction, and along first direction, part of first heat conduction piece is located between heat dissipation piece and the electric core casing, and part of second heat conduction piece is located between heat dissipation piece and the electric core casing, and the shell is connected to the heat dissipation piece, and first heat conduction piece and second heat conduction piece are connected to the heat dissipation piece. According to the utility model, the first heat conduction piece and the second heat conduction piece form the accommodating space, the main body part is arranged in the accommodating space to radiate the main body part, and the heat of the main body part is conducted to the shell through the heat radiation piece by the first heat conduction piece and the second heat conduction piece, so that the heat radiation efficiency is improved.

Alternatively, in some embodiments of the utility model, the first thermally conductive member comprises a first base portion and the second thermally conductive member comprises a second base portion. The body portion includes a body front wall and a body rear wall aligned in a second direction. The first base is connected to the body front wall and the second base is connected to the body rear wall. The first direction is perpendicular to the second direction, can dispel the heat to the main part front wall and the main part back wall of main part portion, is favorable to promoting radiating efficiency, reduces the difference in temperature of electric core different positions, is favorable to promoting the performance of electric core.

Optionally, in some embodiments of the present utility model, the first heat conducting member includes a first extension portion, the first extension portion is connected to the first base portion, the first extension portion is disposed between the main body portion and the heat dissipating member, and the first extension portion is connected to the heat dissipating member. The heat of the front wall of the main body is conducted to the heat dissipation piece through the first extension part and dissipated through the heat dissipation channel.

Alternatively, in some embodiments of the present utility model, the first heat conductive member includes two first extension portions, and the two first extension portions connect the first base portion in the first direction. One of the first extending parts is arranged between the main body part and the heat dissipation part and is connected with the heat dissipation part, and the other first extending part is arranged between the main body part and the shell and is connected with the shell and further improves heat dissipation.

Alternatively, in some embodiments of the present utility model, the first heat conductive member includes a first connection portion, and the first connection portion is connected to the first base portion. The first connecting portion and the main body portion are arranged along a third direction, the first connecting portion is arranged between the shell and the main body portion, and the first connecting portion is connected with the shell. The first direction, the second direction and the third direction are perpendicular in pairs, and heat dissipation is further improved.

Optionally, in some embodiments of the utility model, the second heat conducting member includes a second extension, the second extension being connected to the second base. The second extension part is arranged between the main body part and the heat dissipation piece. Along the second direction, the first extending part is arranged towards the second extending part, the second extending part is arranged towards the first extending part, and a first gap H is arranged between the first extending part and the second extending part ₁ ,0mm＜H ₁ The heat dissipation device has the advantages that the stacking possibility of the first extending part and the second extending part is reduced less than 0.3mm, the flatness of the first extending part and the second extending part can be improved, the connection of the first left wall and the heat dissipation piece is facilitated, the heat dissipation area is ensured, the assembly is convenient, and the production is facilitated.

Optionally, in some embodiments of the present utility model, the heat dissipation element includes a heat dissipation channel, and the heat dissipation channel communicates with the outside to facilitate heat dissipation.

Alternatively, in some embodiments of the utility model, the housing comprises a first front wall and a first rear wall arranged in the second direction, the first front wall having a first housing opening, the first rear wall being in particular a second housing opening. The heat dissipation channel communicates the first housing opening and the second housing opening.

Optionally, in some embodiments of the present utility model, the electrical core assembly includes a first electrical core assembly and a second electrical core assembly, the first electrical core assembly includes a plurality of electrical core units, the second electrical core assembly includes a plurality of electrical core units, and the heat dissipation member is disposed between the first electrical core assembly and the second electrical core assembly and can dissipate heat from the first electrical core assembly and the second electrical core assembly.

Optionally, in some embodiments of the present utility model, the second heat conductive member includes a second base portion and two second extension portions, the two second extension portions connecting both sides of the second base portion in the first direction. The second base portion is connected to the main body portion. Along the first direction, one of the second extending parts is arranged between the shell and the main body part, and the other second extending part is arranged between the main body part and the heat dissipation piece. The heat of the main body part is conducted to the shell and the heat dissipation piece through the second extension part, and the heat dissipation is further facilitated.

Optionally, in some embodiments of the present utility model, the first extension is disposed between the second sealing portion and the heat dissipation element, and the second extension is disposed between the second sealing portion and the heat dissipation element, so as to facilitate heat dissipation.

Optionally, in some embodiments of the present utility model, the first extension portion is disposed between the main body portion and the heat dissipation element, and the second extension portion is disposed between the second sealing portion and the heat dissipation element, so as to facilitate heat dissipation.

Optionally, in some embodiments of the present utility model, the first extension portion is disposed between the second sealing portion and the heat dissipation element, and the second extension portion is disposed between the main body portion and the heat dissipation element, so as to facilitate heat dissipation.

The embodiment of the utility model also provides electric equipment, which comprises the battery pack in any embodiment.

Above-mentioned group battery and consumer form accommodation space through first heat conduction spare and second heat conduction spare, and accommodation space is located to main part, dispels the heat to main part to heat through the heat dissipation spare with the heat of main part is conducted to the shell through first heat conduction spare and second heat conduction spare, be favorable to promoting radiating efficiency.

Drawings

Fig. 1 shows a schematic diagram of the structure of a battery pack in some embodiments.

Fig. 2 illustrates a schematic structural view of a battery pack at another view angle in some embodiments.

Fig. 3 shows an exploded schematic view of a battery pack in some embodiments.

Fig. 4 illustrates a schematic diagram of the structure of a cell in some embodiments.

Fig. 5 illustrates an exploded schematic view of a cell in some embodiments.

Fig. 6 illustrates an exploded view of a cell and a thermally conductive member in some embodiments.

Fig. 7 shows a schematic structural diagram of the cell and the heat conductive member in some embodiments.

Fig. 8 is an exploded view showing a part of the structure of a battery pack in some embodiments.

Fig. 9 shows a schematic structural view of a heat sink in some embodiments.

Fig. 10 shows a schematic structural view of a portion of a battery pack in some embodiments.

Fig. 11 illustrates a schematic structural view of a portion of a battery pack at another view angle in some embodiments.

Fig. 12 illustrates a schematic of a powered device in some embodiments.

Description of main reference numerals:

battery pack 100

Housing 10

First elastic member 101

Second elastic member 102

Second heat conductive adhesive 100b

First housing opening 10a

Second housing opening 10b

First front wall 11

First rear wall 12

First left wall 13

First heat sink 131

First right wall 14

Second heat sink 141

First bottom wall 15

A first top wall 16

Third heat sink 161

Bracket 17

Cell assembly 20

First cell assembly 201

Second cell assembly 202

Cell unit 20a

Accommodation space 20b

First gap 20c

Second gap 20d

Cell 21

Cell housing 211

Body portion 211a

First housing 2111

First concave portion 2111a

Second housing 2112

Second concave portion 2112a

First extension edge 2113

Second extension edge 2114

Body sidewall 2101

Main body bottom wall 2102

Main body top wall 2103

Main body front wall 2104

Body back wall 2105

Sealing portion 211b

First sealing portion 2115

Second seal portion 2116

Electrode terminal 212

Electrode assembly 213

First heat conductive member 22

First base 221

First extension 222

First connection portion 223

Second heat conductive member 23

A second base 231

Second extension 232

Second connecting portion 233

Radiator 30

Heat dissipation channel 30a

Front wall 31 for heat dissipation

Heat dissipation back wall 32

Left heat dissipation wall 33

Right heat dissipation wall 34

Electric equipment 200

First direction X

Second direction Y

Third direction Z

The utility model will be further illustrated by the following specific examples in conjunction with the above-described figures.

Detailed Description

The following detailed description is exemplary, but not limiting, and is intended to provide a basic understanding of the utility model and is not intended to identify key or critical elements of the utility model or to delineate the scope of the utility model. The technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.

When an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

It is to be understood that the term "perpendicular, equal" is used to describe an ideal state between two components. In the actual production or use state, there may be a state approximately perpendicular or equal between the two members. For example, in conjunction with the numerical description, perpendicular may refer to an angle between two straight lines ranging between 90++10°, perpendicular may also refer to a dihedral angle between two planes ranging between 90++10°, and perpendicular may also refer to an angle between a straight line and a plane ranging between 90++10°. The two components described as "perpendicular" may be considered "straight" or "planar" as they are considered "straight" or "planar" in that they are not strictly straight or planar, but may be substantially straight or planar in that they extend in a macroscopic manner.

The terms "vertical," "horizontal," "left," "right," "top," "bottom," "front," "back," and the like are used herein for illustrative purposes only and are not intended to limit the utility model.

The term "parallel" is used to describe an ideal state between two components. In an actual production or use state, there may be a state of approximately parallelism between the two components. For example, in connection with numerical descriptions, parallel may refer to an angle between two straight lines ranging between 180++10°, parallel may refer to a dihedral angle between two planes ranging between 180++10°, and parallel may refer to an angle between a straight line and a plane ranging between 180++10°. The two components described as "parallel" may be considered "straight" or "planar" as they are considered "straight" or "planar" in that they are not strictly straight or planar, but may be substantially straight or planar in that they extend in a macroscopic manner.

The term "plurality" as used herein, unless otherwise defined, when used to describe a number of elements, specifically refers to two or more than two of the elements.

In the third direction Z, including the third direction Z and in a direction opposite to the third direction Z, in the first direction X, including the first direction X and in a direction opposite to the first direction X, and in the second direction Y, including the second direction Y and in a direction opposite to the second direction Y.

Referring to fig. 1 to 7 and fig. 10 to 11, a battery pack 100 according to an embodiment of the present utility model includes a housing 10, a battery cell assembly 20 and a heat sink 30. The cell assembly 20 is disposed within the housing 10. The cell assembly comprises cell units 20a, each cell unit 20a comprising a cell 21, a first heat conducting member 22 and a second heat conducting member 23. The first heat conductive member 22 and the second heat conductive member 23 form an accommodating space 20b. The battery cell 21 includes a battery cell housing 211, electrode terminals 212, and an electrode assembly 213. The electrode assembly 213 is provided in the cell case 211, and the electrode terminal 212 is connected to the electrode assembly 213 and led out from the cell case 211. The cell case 211 includes a main body portion 211a and a first sealing portion 2115, the electrode assembly 213 is provided in the main body portion 211a, the electrode terminal 212 extends out of the cell case 211 from the first sealing portion 2115, the main body portion 211a is provided in the accommodation space 20b, and the first sealing portion 2115 is provided outside the accommodation space 20b. The heat sink 30 is disposed within the housing 10. The heat sink 30 and the cell assembly 20 are aligned in the first direction X. Along the first direction X, a portion of the first heat conductive member 22 is located between the heat dissipation member 30 and the cell case 211, and a portion of the second heat conductive member 23 is located between the heat dissipation member 30 and the cell case 211. The heat sink 30 is connected to the housing 10, and the heat sink 30 is connected to the first heat conductive member 22 and the second heat conductive member 23.

The first heat conducting member 22 and the second heat conducting member 23 form the accommodating space 20b, the main body 211a is arranged in the accommodating space 20b, the main body 211a dissipates heat, and the heat of the main body 211a is conducted to the shell 10 through the heat dissipating member 30 by the first heat conducting member 22 and the second heat conducting member 23, so that the heat dissipating efficiency is improved.

Referring to fig. 3, in some embodiments, the battery pack 100 includes a housing 10. The housing 10 comprises a first front wall 11, a first rear wall 12, a first left wall 13, a first right wall 14 and a first bottom wall 15. The first left wall 13 and the first right wall 14 are aligned in the first direction X, and the first front wall 11 and the first rear wall 12 are aligned in the second direction Y. The third direction Z, the first direction X and the second direction Y are perpendicular to each other. The first front wall 11 connects the first left wall 13 and the first right wall 14, the first rear wall 12 connects the first left wall 13 and the first right wall 14, and the first bottom wall 15 connects the first front wall 11, the first rear wall 12, the first left wall 13 and the first right wall 14 to form an accommodation space. Optionally, the cell assembly 20 and the heat sink 30 are disposed in the receiving space.

In some embodiments, the housing 10 includes a first top wall 16, the first bottom wall 15 and the first top wall 16 being aligned along the third direction Z, the housing 10 including a bracket 17, the bracket 17 connecting the first front wall 11, the first rear wall 12, the first left wall 13 and the first right wall 14. The brackets 17 and the first top wall 16 are arranged in the third direction Z, the first top wall 16 being connected to the brackets 17.

In some embodiments, at least one of the first front wall 11, the first rear wall 12, the first left wall 13, the first right wall 14, the first bottom wall 15, and the first top wall 16 comprises a thermally conductive material, which may enhance heat dissipation. Optionally, the first front wall 11, the first rear wall 12, the first left wall 13, the first right wall 14, the first bottom wall 15, and the first top wall 16 each include a metal heat conductive material and a heat conductive insulating material, and the insulating material may cover an outer surface of the metal heat conductive material. Optionally, the metallic thermally conductive material comprises aluminum.

Referring to fig. 3 and 10, in some embodiments, at least one of the first front wall 11, the first rear wall 12, the first left wall 13, the first right wall 14, the first bottom wall 15, and the first top wall 16 is provided with a heat sink, so as to further enhance heat dissipation performance.

Optionally, along the first direction X, a side of the first left wall 13 facing away from the first right wall 14 is provided with a first heat sink 131. Optionally, a side of the first right wall 14 facing away from the first left wall 13 is provided with a second heat sink 141. Optionally, the first top wall 16 is provided with a third heat sink 161.

Referring to fig. 3 and 9, in some embodiments, the heat dissipation element 30 includes a heat dissipation channel 30a, the heat dissipation channel 30a is in communication with the outside, and heat of the battery cell 21 is conducted to the heat dissipation element 30 through the first heat conduction element 22 and the second heat conduction element 23, and is dissipated through the heat dissipation channel 30a, so as to facilitate improving heat dissipation efficiency.

In some embodiments, the housing 10 has a first housing opening 10a and a second housing opening 10b. The first housing opening 10a penetrates the first front wall 11, and the second housing opening 10b penetrates the first rear wall 12. The heat dissipation passage 30a communicates with the first and second housing openings 10a and 10b, and the first heat dissipation passage 30a communicates with the outside through the first and second housing openings 10a and 10b.

In some embodiments, the battery pack 100 may pass through the cooling medium from the heat dissipation channel 30a to take away heat. Optionally, the cooling medium comprises at least one of air and a liquid. Alternatively, the liquid may be a liquid from an external environment, such as water.

Taking cooling medium as an example, in some embodiments, the battery pack 100 may be used on a device that is stationary when in use, and natural wind or external air cooling devices, such as fans, may be used to dissipate heat when the battery pack 100 is stationary. Optionally, the battery pack 100 may be used on a dynamic device, such as an unmanned plane, an electric bicycle, etc., where the air flow speed is faster when the device is moving, so as to achieve rapid heat dissipation of the battery pack 100.

It is understood that the first housing opening 10a may be used as an air inlet or an air outlet according to the moving direction of the battery pack 100. When the first housing opening 10a may serve as an air intake, the second housing opening 10b serves as an air outlet. When the first housing opening 10a may be used as an air intake, the second housing opening 10b is used as an air intake.

Referring to fig. 3, 4 and 5, in some embodiments, the cells 21 comprise soft-pack cells. The cell housing 211 includes a first housing 2111 and a second housing 2112, the first housing 2111 being provided with a first recess 2111a, and the second housing 2112 being provided with a second recess 2112a. The first housing 2111 is connected to the second housing 2112, and forms an accommodation space. A portion of the electrode assembly 213 is provided in the first recess 2111a and a portion thereof is provided in the second recess 2112a. The peripheral side of the first housing 2111 extends outward to form a first extension edge 2113, the peripheral side of the second housing 2112 extends outward to form a second extension edge 2114, and after the first housing 2111 is connected to the second housing 2112, the first extension edge 2113 and the second extension edge 2114 overlap and are connected in a sealed manner to form a sealing portion 211b.

In some embodiments, the sealing portion 211b includes a first sealing portion 2115 and two second sealing portions 2116, the first sealing portion 2115 connecting the two second sealing portions 2116, the two second sealing portions 2116 being aligned along the first direction X. The electrode terminal 212 protrudes from the first sealing portion 2115.

In one embodiment, the first sealing portion 2115 is disposed outside the receiving space 20b, and the second sealing portion 2116 is disposed inside the receiving space 20b.

In some embodiments, the first extension 222 is disposed between the second sealing portion 2116 and the heat sink 30, and the second extension 232 is disposed between the second sealing portion 2116 and the heat sink 30 to facilitate heat dissipation.

Referring to fig. 10, in some embodiments, the first extension portion 222 is disposed between the main portion 211a and the heat dissipation element 30, and the second extension portion 232 is disposed between the second sealing portion 2116 and the heat dissipation element 30, which is beneficial for heat dissipation.

Referring to fig. 10, in some embodiments, the first extension portion 222 is disposed between the second sealing portion 2116 and the heat dissipating member 30, and the second extension portion 232 is disposed between the main portion 211a and the heat dissipating member 30, which is beneficial for dissipating heat.

In some embodiments, the body portion 211a includes two body side walls 2101, a body bottom wall 2102, and a body top wall 2103. One of the second sealing portions 2116 is connected to one of the body side walls 2101, the other second sealing portion 2116 is connected to the other body side wall 2101, and the first sealing portion 2115 is connected to the body top wall 2103.

Referring to fig. 3 to 7, 10 and 11, in some embodiments, the first heat conductive member 22 includes a first base 221 and a first extension 222, and the first base 221 is connected to the first extension 222. Along the second direction Y, the main body portion 211a includes a main body front wall 2104 and a main body rear wall 2105, the first base 221 is connected to the main body front wall 2104, the first extension 222 is provided between the main body portion 211a and the heat sink 30, the first extension 222 is connected to the heat sink 30, and heat of the main body front wall 2104 is conducted to the heat sink 30 through the first extension 222 and dissipated through the heat dissipating channel 30 a.

In some embodiments, the second heat conductive member 23 includes a second base 231 and a second extension 232, and the second base 231 is connected to the second extension 232. The second base 231 is connected to the main body rear wall 2105, the second extension 232 is provided between the main body portion 211a and the heat sink 30, the second extension 232 is connected to the heat sink 30, and heat of the main body rear wall 2105 is conducted to the heat sink 30 through the second extension 232 and dissipated through the heat dissipating channel 30 a. The first heat conducting piece 22 and the second heat conducting piece 23 can radiate heat to the main body front wall 2104 and the main body rear wall 2105 of the main body part 211a, so that the heat radiation efficiency is improved, the temperature difference of different positions of the battery cell 21 is reduced, and the performance of the battery cell 21 is improved.

In some embodiments, the first base 221, the first extension 222, the second base 231, and the second extension 232 form the receiving space 20b.

In some embodiments, the first extension 222 contacts the connecting heat sink 30 to facilitate heat dissipation.

In some embodiments, the battery pack 100 includes a first heat conductive glue (not shown), and the first extension 222 is connected to the heat sink 30 through the first heat conductive glue, which further facilitates heat dissipation.

In some embodiments, the second extension 232 contacts the connecting heat sink 30 to facilitate heat dissipation.

In some embodiments, the second extension 232 is connected to the heat dissipating member 30 through the first heat conductive adhesive, which further facilitates heat dissipation.

In some embodiments, the first heat conductive member 22 includes a first base 221 and two first extension portions 222, and the two first extension portions 222 connect both sides of the first base 221 along the first direction X. The first base 221 is connected to the main body front wall 2104. Along the first direction X, one of the first extending portions 222 is provided between the first left wall 13 and one of the main body side walls 2101, and the other of the first extending portions 222 is provided between the other of the main body side walls 2101 and the heat sink 30. The heat of the main body front wall 2104 is conducted to the first left wall 13 and the heat sink 30 through the first extension 222, further facilitating heat dissipation.

In some embodiments, one of the first extending portions 222 is connected to the first left wall 13, and the other first extending portion 222 is connected to the heat dissipating member 30, so as to facilitate heat dissipation.

In some embodiments, the battery pack 100 includes a first heat conductive adhesive (not shown), wherein one of the first extending portions 222 is connected to the first left wall 13 through the first heat conductive adhesive, and the other of the first extending portions 222 is connected to the heat dissipating member 30 through the first heat conductive adhesive, so as to further facilitate heat dissipation.

In some embodiments, the second heat conductive member 23 includes a second base 231 and two second extension parts 232, and the two second extension parts 232 connect both sides of the second base 231 in the first direction X. The second base 231 is connected to the body back wall 2105. Along the first direction X, one of the second extending portions 232 is disposed between the first left wall 13 and one of the main body side walls 2101, and the other of the second extending portions 232 is disposed between the other of the main body side walls 2101 and the heat sink 30. The heat of the main body rear wall 2105 is conducted to the first left wall 13 and the heat sink 30 through the second extension 232, further facilitating heat dissipation.

In some embodiments, one of the second extending portions 232 is connected to the first left wall 13, and the other second extending portion 232 is connected to the heat dissipating member 30, so as to facilitate heat dissipation.

In some embodiments, one of the second extending portions 232 is connected to the first left wall 13 through the first heat-conducting glue, and the other second extending portion 232 is connected to the heat dissipating member 30 through the first heat-conducting glue, so as to further facilitate heat dissipation.

In some embodiments, the battery pack 100 includes a second thermally conductive paste 100b, and the first base 221 is connected to the main body front wall 2104 by the second thermally conductive paste 100b to facilitate heat dissipation.

In some embodiments, the second base 231 is connected to the body back wall 2105 by a second thermally conductive glue 100b, further facilitating heat dissipation.

In some embodiments, the first extension 222 of the same cell unit 20a is disposed toward the second extension 232, and the second extension 232 is disposed toward the first extension 222.

In some embodiments, the first gap 20c is formed between the first extending portion 222 and the second extending portion 232 located at two sides of the same main body portion 211a in the second direction Y, so as to reduce stacking possibility of the first extending portion 222 and the second extending portion 232, improve flatness of the first extending portion 222 and the second extending portion 232, facilitate connection of the first left wall 13 and the heat dissipating member 30, ensure heat dissipating area, facilitate assembly, and facilitate production.

In some embodiments, the distance H of the first gap 20c in the second direction Y ₁ Satisfy 0mm < H ₁ ＜0.3mm。H ₁ May be any one of 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm and 0.29 mm.

In some embodiments, the first thermally conductive member 22 includes a first connection portion 223, the first connection portion 223 being connected to the first base 221. The first connection portion 223 is provided between the first bottom wall 15 and the main body bottom wall 2102. The heat of the main body front wall 2104 is conducted to the first bottom wall 15 through the first connecting part 223, facilitating heat dissipation.

In some embodiments, the battery pack 100 includes a third heat conductive adhesive (not shown), and the first connection portion 223 is connected to the first bottom wall 15 through the third heat conductive adhesive, which further facilitates heat dissipation.

In some embodiments, the second heat conductive member 23 includes a second connection portion 233, and the second connection portion 233 is connected to the second base 231. The second connecting portion 233 is provided between the first bottom wall 15 and the main body bottom wall 2102. The heat of the main body rear wall 2105 is conducted to the first bottom wall 15 through the second connecting parts 233, facilitating heat dissipation.

In some embodiments, the second connecting portion 233 is connected to the first bottom wall 15 through a third heat conductive adhesive, which further facilitates heat dissipation.

In some embodiments, the second gap 20d is formed between the first connection portion 223 and the second connection portion 233 located at two sides of the same main body portion 211a in the second direction Y, so as to reduce stacking possibility of the first connection portion 223 and the second connection portion 233, improve flatness of the first connection portion 223 and the second connection portion 233, facilitate connection with the first bottom wall 15, ensure heat dissipation area, facilitate assembly, and facilitate production.

Referring to fig. 6 and 7, in some embodiments, when the battery cell 21 is not connected to the first heat conducting member 22, the first extension portion 222 of the first heat conducting member 22 is configured to be disposed away from the first base 221, such that the first extension portion 222 is disposed obliquely with respect to the first base 221, and an included angle between the first extension portion 222 and the first base 221 is disposed at an obtuse angle α. When the battery cell 21 is placed on the first heat conducting member 22, the risk of the first extension 222 scratching the battery cell housing 211 can be reduced, and the battery cell 21 can be mounted conveniently.

In some embodiments, when the battery cell 21 is not connected to the second heat conductive member 23, the second extension portion 232 of the second heat conductive member 23 is configured to be disposed away from the second base 231, such that the second extension portion 232 is disposed obliquely with respect to the second base 231, and an included angle between the second extension portion 232 and the second base 231 is disposed at an obtuse angle β. When the battery cell 21 is placed on the second heat conducting member 23, the risk of the second extension 232 scratching the battery cell housing 211 can be reduced, and the battery cell 21 can be mounted conveniently.

In some embodiments, the two first extensions 222 of the first heat conductive member 22 are configured to be disposed in a direction away from the first base 221 such that the two first extensions 222 are flared. The main body front wall 2104 is connected to the first base 221. The two second extension portions 232 of the second heat conductive member 23 are arranged to be disposed in a direction away from the second base 231 such that the two second extension portions 232 are flared. The body back wall 2105 is connected to the second base 231. When the battery cell assembly 20, the heat dissipation member 30, the first heat conduction member 22, and the second heat conduction member 23 are mounted in the case 10, the first left wall 13 and the heat dissipation member 30 may press the first extension 222 and the second extension 232 that are disposed obliquely such that the first extension 222 is close to the first base 221 and is substantially parallel to the surface of the first left wall 13 and such that the second extension 232 is close to the second base 231 and is substantially parallel to the surface of the first left wall 13.

Optionally, after assembly, the first extension 222 is perpendicular to the first base 221. Optionally, after assembly, the second extension 232 is perpendicular to the second base 231. The risk of scratching the battery cell housing 211 can be reduced, the battery cell 21 can be conveniently installed, the reserved space for installing the battery cell 21 can be reduced, the sizes of the first heat conduction piece 22 and the second heat conduction piece 23 can be reduced, the space occupied by the first heat conduction piece 22 and the second heat conduction piece 23 can be reduced, and the space utilization rate and the energy density of the battery pack 100 can be improved.

In some embodiments, the first extension 222 is bent at a first angle A with respect to the first base 221, satisfying 3 A.ltoreq.20, A may be any of 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, before assembly.

In some embodiments, the angle B at which the second extension 232 is bent with respect to the second base 231 is the same as the first angle a.

Referring to fig. 3, 8 and 10, in some embodiments, the battery pack 100 includes a first elastic member 101. The first elastic member 101 is disposed between the first front wall 11 and the first base 221 at the outermost side, and can provide an expansion space for the battery cells 21, and can reduce the heat dissipation of the battery cells 21 connected to the first base 221 through the first front wall 11, thereby reducing the temperature difference between the plurality of battery cells 21 and being beneficial to improving the performance of the battery pack 100.

In some embodiments, the first elastic member 101 is disposed between the first rear wall 12 and the second base 231 at the outermost side, so as to provide an expansion space for the battery cells 21, and reduce the heat dissipation of the battery cells 21 connected to the second base 231 through the first rear wall 12, so as to reduce the temperature difference between the battery cells 21, which is further beneficial to improving the performance of the battery pack 100. Optionally, the first elastic member 101 comprises foam.

In some embodiments, the battery pack 100 includes a second elastic member 102, where the second elastic member 102 is disposed between the adjacent first base 221 and second base 231, and may provide an expansion space for the battery cells 21. Optionally, the second elastic member 102 comprises foam.

Referring to fig. 1, 3, 9 and 11, in some embodiments, the heat sink 30 includes a heat dissipation front wall 31 and a heat dissipation rear wall 32 disposed along the second direction Y. In the second direction Y, the heat dissipation path 30a penetrates the heat dissipation front wall 31 and the heat dissipation rear wall 32. The heat dissipation front wall 31 is connected to the first front wall 11, and the heat dissipation rear wall 32 is connected to the first rear wall 12.

In some embodiments, the heat sink 30 includes a heat dissipation left wall 33 and a heat dissipation right wall 34 arranged along the first direction X, the heat dissipation left wall 33 connecting the heat dissipation front wall 31 and the heat dissipation rear wall 32, and the heat dissipation right wall 34 connecting the heat dissipation front wall 31 and the heat dissipation rear wall 32.

In some embodiments, the cell assembly 20 includes a first cell assembly 201 and a second cell assembly 202. The first cell assembly 201 and the second cell assembly 202 are arranged along a first direction X. The first cell assembly 201 includes a plurality of cell units 20a, and the second cell assembly 202 includes a plurality of cell units 20a.

In some embodiments, the first cell assembly 201 includes at least two cells 21 stacked in the second direction Y and a first heat conductive member 22 and a second heat conductive member 23 connecting each cell 21, and the second cell assembly 202 includes at least two cells 21 stacked in the second direction Y and a first heat conductive member 22 and a second heat conductive member 23 connecting each cell 21.

In some embodiments, the heat sink 30 is located between the first cell assembly 201 and the second cell assembly 202. The first cell assembly 201 is disposed between the first left wall 13 and the heat dissipation left wall 33, and the second cell assembly 202 is disposed between the heat dissipation right wall 34 and the first right wall 14, so that heat dissipation can be performed on the first cell assembly 201 and the second cell assembly 202.

Referring to fig. 12, the present utility model further provides an electric device 200 using the battery pack 100. In an embodiment, the electric device 200 of the present utility model may be, but is not limited to, an electronic device, an unmanned aerial vehicle, a standby power supply, an electric automobile, an electric motorcycle, an electric bicycle, an electric tool, a large-sized battery pack for home use, and the like.

It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration of the utility model and are not intended to be limiting, and that suitable modifications and variations of the above embodiments are within the scope of the disclosure, insofar as they fall within the true spirit of the utility model.

Claims (10)

1. A battery pack, comprising:

a housing;

the battery cell assembly is arranged in the shell and comprises battery cell units, each battery cell unit comprises a battery cell, a first heat conduction piece and a second heat conduction piece, and the first heat conduction piece and the second heat conduction piece form an accommodating space;

the battery cell comprises a battery cell shell, an electrode assembly and an electrode terminal, wherein the electrode terminal is connected to the electrode assembly and led out from the battery cell shell, the battery cell shell comprises a main body part and a first sealing part, the electrode assembly is arranged on the main body part, and the electrode terminal extends out of the battery cell shell from the first sealing part; the main body part is arranged in the accommodating space, and the first sealing part is arranged outside the accommodating space;

the heat dissipation piece, the heat dissipation piece is located in the shell, heat dissipation piece and electric core subassembly are arranged in first direction, along first direction, the part of first heat conduction piece is located between heat dissipation piece and the electric core casing, the part of second heat conduction piece is located between heat dissipation piece and the electric core casing, the heat dissipation piece is connected the shell, the heat dissipation piece is connected first heat conduction piece and second heat conduction piece.

2. The battery of claim 1, wherein the first thermally conductive member comprises a first base portion and the second thermally conductive member comprises a second base portion;

the main body portion includes a main body front wall and a main body rear wall arranged in a second direction;

the first base is connected with the front wall of the main body, and the second base is connected with the rear wall of the main body;

the first direction is perpendicular to the second direction.

3. The battery of claim 2, wherein the first thermally conductive member includes a first extension portion, the first extension portion being connected to the first base portion, the first extension portion being disposed between the main body portion and the heat sink, the first extension portion being connected to the heat sink.

4. The battery pack according to claim 2, wherein the first heat conductive member includes two first extending portions, the two first extending portions connecting the first base portion in the first direction;

one of the first extending parts is arranged between the main body part and the heat radiating piece and is connected with the heat radiating piece, and the other first extending part is arranged between the main body part and the shell and is connected with the shell.

5. The battery pack according to claim 2, wherein the first heat conductive member includes a first connection portion that connects the first base portion;

the first connecting part and the main body part are arranged along a third direction, the first connecting part is arranged between the shell and the main body part, and the first connecting part is connected with the shell;

the first direction, the second direction and the third direction are perpendicular to each other.

6. The battery of claim 3, wherein the second thermally conductive member includes a second extension, the second extension being connected to the second base;

the second extension part is arranged between the main body part and the radiating piece;

along the second direction, the first extending portion is disposed towards the second extending portion, the second extending portion is disposed towards the first extending portion, and a first gap H is disposed between the first extending portion and the second extending portion ₁ ,0mm＜H ₁ ＜0.3mm。

7. The battery pack according to any one of claims 2 to 6, wherein the heat dissipation member includes a heat dissipation path, and the heat dissipation path communicates with the outside.

8. The battery of claim 7, wherein the housing comprises a first front wall and a first rear wall aligned in the second direction, the first front wall having a first housing opening, the first rear wall having a second housing opening;

the heat dissipation channel communicates the first housing opening and the second housing opening.

9. The battery pack of claim 1, wherein the cell assembly comprises a first cell assembly and a second cell assembly, the first cell assembly comprising a plurality of the cell units, the second cell assembly comprising a plurality of the cell units, the heat sink being disposed between the first cell assembly and the second cell assembly.

10. A powered device comprising a battery pack as claimed in any one of claims 1 to 9.