CN115275426A

CN115275426A - Battery pack and electric equipment

Info

Publication number: CN115275426A
Application number: CN202210949968.3A
Authority: CN
Inventors: 张熊; 徐卫潘
Original assignee: Xiamen Xinnengda Technology Co Ltd
Current assignee: Xiamen Xinnengda Technology Co Ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-11-01

Abstract

The application provides a battery pack and electric equipment, wherein the battery pack comprises a plurality of battery cell units, the battery cell units are stacked and arranged along a first direction, each battery cell unit comprises a support and a battery cell, and the support is provided with a first supporting part; the battery cell is accommodated in the bracket; the first support portion is configured to support adjacent brackets in a first direction such that a gap is formed between adjacent brackets. The battery cell is accommodated in the support, then the heat that the electric core produced in the charge-discharge process can be transferred to the clearance between two adjacent supports through the support in, and heat radiating area is big, and heat transfer route is short, and the thermal resistance is lower, and then the heat that the electric core produced can be shifted away through this clearance fast to reduce the temperature of battery cell fast, and then improve the heat-sinking capability of group battery, thereby be favorable to providing the security performance of group battery.

Description

Battery pack and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack and electric equipment.

Background

When the battery pack is used under the working conditions of high multiplying power, no standing and continuous charging and discharging (such as an agricultural unmanned aerial vehicle battery pack), the problem of overhigh temperature of a battery core can be caused; in order to ensure charging and discharging, the temperature of the battery cell needs to be quickly reduced, but the existing battery pack scheme cannot completely meet the requirement of quickly cooling the battery cell.

Disclosure of Invention

The embodiment of the application provides a battery pack and electric equipment, so that the heat dissipation capacity of a battery is improved.

In a first aspect, an embodiment of the present application provides a battery pack, where the battery pack includes a plurality of cell units, the cell units are stacked and arranged along a first direction, each cell unit includes a bracket and a cell, and the bracket is provided with a first supporting portion; the battery cell is accommodated in the bracket; wherein the first supporting portion is configured to support the adjacent brackets along the first direction so that a gap is formed between the adjacent brackets.

Among the above-mentioned technical scheme, the first supporting part of support supports in adjacent support to form the clearance between two adjacent supports, electric core holds in the support, then the heat that charge-discharge in-process electricity core produced can pass through the support and transmit to the clearance between two adjacent supports in, heat radiating area is big, the heat transfer route is short, the thermal resistance is lower, then the heat that electricity core produced can shift away through this clearance fast, thereby reduce the temperature of electric core fast, and then improve the heat-sinking capability of group battery, thereby be favorable to providing the security performance of group battery. And the support not only bears the effect of holding and protecting the battery cell, but also can be favorable for heat dissipation, and has simple structure and small occupied space.

In some embodiments of the first aspect of the present application, the bracket is further provided with a second support portion, the second support portion and the first support portion are respectively provided on both sides of the bracket along the first direction, the second support portion is configured to cooperate with the first support portion of an adjacent bracket.

Among the above-mentioned technical scheme, two electric core units are along the first direction pile configuration back, and the second supporting part of a support of two adjacent electric core units and the first supporting part location fit of another support of two adjacent electric core units can improve the accuracy of the location that two adjacent electric core units piled up and pile up stability to improve the stability of whole group battery structure.

In some embodiments of the first aspect of the present application, the bracket is provided with a plurality of the first support portions, and the plurality of the first support portions are spaced apart.

Among the above-mentioned technical scheme, a plurality of first supporting part interval distribution of support adjacent support jointly, can improve support stability to make and form stable clearance between two adjacent supports, be favorable to electric core to stabilize quick heat dissipation. A plurality of first supporting parts support adjacent support jointly and can also improve two adjacent electric core units and pile up stability.

In some embodiments of the first aspect of the present application, a plurality of the first supporting portions are distributed in a rectangular array on the support.

Among the above-mentioned technical scheme, a plurality of first supporting part rectangular array distributes in the support, not only can improve piling up stability of two adjacent electric core units, still is favorable to electric core uniform heat dissipation.

In some embodiments of the first aspect of the present application, the battery cell unit further includes a heat conduction member disposed on an inner surface of the bracket.

Among the above-mentioned technical scheme, the heat-conducting piece sets up in the internal surface of support, can make the heat that electric core produced transmit to the support fast to the clearance between the adjacent support shifts away fast, thereby improves the radiating efficiency of electric core.

In some embodiments of the first aspect of the present application, the bracket includes a first portion and a second portion, the first portion and the second portion are arranged along the first direction, the first portion and the second portion jointly define a housing space, and the battery cell is received in the housing space.

Among the above-mentioned technical scheme, the support forms the accommodation space who holds electric core through first portion and second part equipment back, makes things convenient for electric core to get into in the support, and the different positions of the support of being convenient for are maintained.

In some embodiments of the first aspect of the present application, the first portion is provided with a first fixing portion, the second portion is provided with a second fixing portion, and the first fixing portion and the second fixing portion are fixedly engaged along the first direction; along the first direction, the first fixing portion and the first supporting portion are respectively arranged on two sides of the first portion, and the second fixing portion and the second supporting portion are respectively arranged on two sides of the second portion.

In the technical scheme, in the process of assembling the first part and the second part to form the bracket, the first fixing part of the first part is matched with the second fixing part of the second part, so that the accurate positioning of the first fixing part and the second fixing part in the assembling process is favorably improved, the bracket is convenient to assemble and mold, and the first part and the second part are kept in a relatively stable matching relationship, so that the structure of the bracket is stable; the first fixing part and the first supporting part are respectively arranged on two sides of the first part, the second fixing part and the second supporting part are respectively arranged on two sides of the second part, manufacturing is convenient, and the second supporting part and the first supporting part can be matched, and the first fixing part and the second fixing part of the adjacent support are not interfered mutually.

In some embodiments of the first aspect of the present application, at least one end of the cell unit along a second direction forms an electric energy output portion, a first channel through which the electric energy output portion passes is formed between the first portion and the second portion, and the second direction is perpendicular to the first direction; the battery pack also includes a first seal configured to close the first channel.

Among the above-mentioned technical scheme, the electric energy output part of electric core extends from first passageway, makes things convenient for electric energy output part to be connected with the electric energy of output electric core with other structure electricity. The first channel is sealed by the first sealing piece, so that the risk that liquid leakage of the battery core and external impurities enter the battery core can be reduced.

In some embodiments of the first aspect of the present application, the power output portion includes a main body portion and a folded portion provided to the main body portion in a third direction; the first passage includes a first space and an accommodating chamber provided in the first space in the third direction, the accommodating chamber communicates with the first space, the main body portion is accommodated in the first space, and the bent portion is accommodated in the accommodating chamber; the first direction, the second direction and the third direction are perpendicular to each other.

Among the above-mentioned technical scheme, electric energy output portion is formed with dog-ear portion at its main part along the both ends of third direction, can reduce the size of electric energy output portion in the third direction, dog-ear portion holds in holding the room, the main part holds in first space, make the size of holding the room and the size matching of the dog-ear portion that corresponds and the size of first space match with the size of first space, the electric energy output portion of being convenient for stretches out the first passageway of support, and reduced the sealed degree of difficulty to first passageway.

In some embodiments of the first aspect of the present application, the first portion comprises a first flat portion and a first bent portion, the second portion comprises a second flat portion and a second bent portion, and the second bent portion is connected to the second flat portion along the third direction; the first flat portion and the second flat portion are arranged oppositely along the first direction and form the first space, and the first bent portion and the second bent portion form the accommodating chamber.

In the above technical solution, the first space is formed by a first straight portion of the first portion and a second straight portion of the second portion, and each accommodating chamber is formed by a first bending portion of the first portion and a second bending portion of the second portion, so that the electric energy output portion can enter the first passage and extend from the first passage.

In some embodiments of the first aspect of the present application, the first straight portion is provided with a first limit groove extending in the third direction, and a portion of the first sealing member is received in the first limit groove; and/or a second limiting groove extending along the third direction is arranged on the second straight part, and part of the first sealing element is accommodated in the second limiting groove.

In the technical scheme, part of the first sealing element is accommodated in the first limiting groove, and the first limiting groove can limit the first sealing element so that the part of the first sealing element has a stable sealing effect on the first space; and/or the part of the first sealing element is accommodated in the second limiting groove, and the second limiting groove can limit the first sealing element so as to ensure that the part of the first sealing element has a stable sealing effect on the first space.

In some embodiments of the first aspect of the present application, the first sealing element includes a first sealing portion, a second sealing portion, a third sealing portion and a fourth sealing portion, the first sealing portion and the second sealing portion are sealed in the first space and are respectively located on two sides of the main body portion along the first direction, the third sealing portion is located in one of the accommodating chambers and covers the folded portion, and the fourth sealing portion is located in the other of the accommodating chambers and covers the folded portion.

Among the above-mentioned technical scheme, first sealing and second sealing all seal in first space and are located the main part respectively and follow the both sides of first direction, can improve the sealing performance to first space, and third sealing and fourth sealing hold respectively in two accommodation chambers and the dog-ear portion that the cladding corresponds, can improve the sealing performance between dog-ear portion and the support.

In some embodiments of the first aspect of the present application, the third seal and the fourth seal are potted within two of the receiving chambers, respectively.

Among the above-mentioned technical scheme, through third sealing and the fourth sealing that the embedment formed, can strengthen the wholeness ability of third sealing, dog-ear portion and support and fourth sealing, dog-ear portion and support, can improve the resistance to external impact, vibrations and improve waterproof, humidity resistance. And the encapsulation process enables the third sealing part and the fourth sealing part to more easily cover the corresponding bevel parts.

In some embodiments of the first aspect of the present application, two adjacent battery cell units are provided with two sealing structures, and along the second direction, the two sealing structures are respectively disposed at two ends of the support to seal two ends of the gap along the second direction.

Among the above-mentioned technical scheme, two seal structure shutoff gaps are along the both ends of second direction respectively, reduce other impurity and get into the clearance along the both ends that the clearance is located the second direction and shutoff gap or occupy the risk in the part in clearance to guarantee the heat radiating area in clearance.

In some embodiments of the first aspect of the present application, the sealing structure includes a fifth sealing portion and a sixth sealing portion, the fifth sealing portion and the sixth sealing portion are respectively disposed at two adjacent brackets along the first direction, and the fifth sealing portion and the sixth sealing portion are in sealing engagement.

Among the above-mentioned technical scheme, set up in the fifth sealing and the sixth sealing of two adjacent supports and can pile up the sealed cooperation of completion back at two supports to the shutoff clearance is along the both ends of second direction, reduces other impurity and gets into the clearance and the risk of shutoff clearance or the part that occupies the clearance along the both ends that the clearance is located the second direction, thereby guarantees the heat radiating area in clearance.

In some embodiments of the first aspect of the present application, the fifth seal portion forms a seal groove, and the sixth seal portion is interposed in the seal groove; the seal structure also includes a second seal located within the seal groove and sealing a gap between the sixth seal and the seal groove.

Among the above-mentioned technical scheme, the sixth sealing portion is inserted and is located in the seal groove that forms on the fifth sealing portion, not only can play sealed effect between two adjacent supports, reduces the risk that other impurity got into the clearance along the both ends that the clearance is located the second direction, can also play the positioning action between two adjacent supports, improves the stability of piling up of two adjacent supports. The second sealing element seals a gap between the sixth sealing part and the sealing groove, and the sealing performance between the two adjacent brackets is further improved.

In some embodiments of the first aspect of the present application, both ends of the cell in the second direction form an electric energy output portion.

Among the above-mentioned technical scheme, electric core all forms electric energy output portion along the both ends of second direction, and the polarity of the electric energy output portion at both ends is opposite, reduces the risk of the electric energy output portion contact that two polarities are opposite to reduce the risk of group battery short circuit.

In some embodiments of the first aspect of the present application, both ends of the cell unit in the second direction form the power output part; the battery pack further comprises two side walls, the two side walls are respectively located on two sides of the battery cell unit along the second direction, and each support is connected with the two side walls; an accommodating cavity is formed in one side of the side wall facing the battery cell unit, and each electric energy output part is accommodated in the accommodating cavity; the battery pack further comprises a third sealing member filled in the accommodating cavity.

Among the above-mentioned technical scheme, two lateral walls are located the both sides of electric core unit along the second direction respectively, can play the guard action to electric core unit in the both sides of second direction to electric core unit. Each support is connected with two side walls, so that a plurality of battery cell units can keep a relatively stable stacking relation, and the battery pack can form a stable integral structure. The third sealing member is filled in the cavity that holds of lateral wall towards electric core unit one side to improve the sealing performance between lateral wall and the electric core unit, reduce other impurity get into and hold the risk that gets into the clearance again from the both ends of clearance in the second direction after the chamber and reduce other impurity pollution or damage electric energy output portion's risk.

In some embodiments of the first aspect of the present application, the cell comprises a housing, an electrode assembly, and an electrode terminal connected to the electrode assembly and extending from the housing; wherein the case includes a body part in which the electrode assembly is accommodated and an extension part extending outward from the body part, and the electrode terminal extends from the extension part.

In the technical scheme, the electrode assembly is accommodated in the body part of the shell, and the electrode terminal extends out of the extending part of the shell, so that the inner structure of the shell is matched with the electrode assembly and the electrode terminal, and the shell and the electrode terminal are convenient to seal subsequently.

In some embodiments of the first aspect of the present application, the battery cell unit further includes an insulator that is fitted around an outer periphery of the body portion.

Among the above-mentioned technical scheme, the periphery of this somatic part is located to the insulator cover, can insulate and separate electric core and support, reduces the risk of group battery short circuit.

In some embodiments of the first aspect of the present application, the battery pack further includes a circuit board, the electric power output portion is electrically connected to the circuit board, and a fourth sealing member is filled between two ends of the circuit board and two of the side walls, respectively, along the second direction.

Among the above-mentioned technical scheme, the circuit board is filled with the fourth sealing member between the both ends of second direction and lateral wall, can play the guard action to the hookup location of electric energy output portion and circuit board, reduces other impurity and gets into the space between lateral wall and the circuit board and lead to the electric connection of electric energy output portion and circuit board to become invalid risk.

In some embodiments of the first aspect of the present application, the battery pack further includes a top wall, and the top wall covers a side of the circuit board facing away from the battery cell unit and is connected to the two side walls.

Among the above-mentioned technical scheme, the roof lid closes the one side that deviates from electric core unit with the circuit board, can play the guard action to the circuit board, reduces the risk that the circuit board damage received external force and damaged.

In some embodiments of the first aspect of the present application, the cell is a flexible-package cell.

Among the above-mentioned technical scheme, the casing of soft-packaged electrical core is softer, if it is direct to pile up along the first direction, then in close contact with between the adjacent electric core, heat dispersion is relatively poor, through holding soft-packaged electrical core in the support, the supporting part of support supports in adjacent support, can form the clearance between two adjacent supports, then the heat that the soft-packaged electrical core produced among the charge-discharge process can pass through the support and transmit to the clearance between two adjacent supports in, heat radiating area is big, the heat transfer route is short, the thermal resistance is lower, then the heat that soft-packaged electrical core produced can shift away through this clearance fast, thereby reduce the temperature of soft-packaged electrical core fast, and then improve the heat-sinking capability of group battery.

In a second aspect, an embodiment of the present application provides an electric device, which includes the battery pack provided in any embodiment of the first aspect.

Among the above-mentioned technical scheme, the group battery heat-sinking capability that the first aspect embodiment provided is good, and the radiating efficiency is high to make the security performance of group battery higher, thereby improve consumer's power consumption safety.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings can also be obtained according to the drawings.

Fig. 1 is an exploded view of a plurality of cell units provided in some embodiments of the present application;

fig. 2 is a cross-sectional view of a cell unit provided in some embodiments of the present application;

fig. 3 is a cross-sectional view of two adjacent cell units stacked;

FIG. 4 is an enlarged view taken at A in FIG. 3;

fig. 5 is a cross-sectional view of two adjacent cell units stacked according to other embodiments of the present disclosure;

FIG. 6 is an enlarged view at B in FIG. 5;

fig. 7 is a cross-sectional view of two adjacent cell units stacked according to further embodiments of the present disclosure;

FIG. 8 is an enlarged view at C of FIG. 7;

fig. 9 is a structural cross-sectional view of a cell unit according to another embodiment of the present application;

fig. 10 is a schematic diagram of the cell units in fig. 9 after stacking;

FIG. 11 is an enlarged view taken at D of FIG. 10;

fig. 12 is a structural cross-sectional view of a cell unit according to still other embodiments of the present application;

fig. 13 is a schematic diagram of the cell unit of fig. 12 after stacking;

FIG. 14 is an enlarged view at E in FIG. 13;

fig. 15 is a perspective view of a cell unit provided in some embodiments of the present application;

fig. 16 is an exploded view of a cell unit provided in some embodiments of the present application;

FIG. 17 is a schematic structural view of a first portion provided in some embodiments of the present application;

FIG. 18 is a schematic structural view of a second portion provided in some embodiments of the present application;

fig. 19 is a perspective view of a cell unit according to further embodiments of the present application;

FIG. 20 is an enlarged view of FIG. 19 at F;

fig. 21 is a schematic structural diagram of a battery cell provided in some embodiments of the present application;

fig. 22 is a structural schematic diagram of a casing of a battery cell;

fig. 23 is a schematic structural diagram of a battery cell according to another embodiment of the present application;

FIG. 24 is a schematic illustration of a first portion of the present application according to further embodiments;

FIG. 25 is a schematic illustration of a second portion of the present application according to still other embodiments;

FIG. 26 is a schematic view of the first seal of the present application in cooperation with the first and second grooves (enlarged view at G in FIG. 2);

FIG. 27 is an enlarged view at H in FIG. 3;

FIG. 28 is a schematic view of a first portion of one and a second portion of the other of two adjacent brackets sealingly mated by a sealing structure;

fig. 29 is a schematic structural view of a battery pack according to another embodiment of the present application;

FIG. 30 is a schematic view of a sidewall construction according to some embodiments of the present application;

FIG. 31 is a cross-sectional view of a battery pack provided in accordance with still other embodiments of the present application;

FIG. 32 is an enlarged view at J of FIG. 31;

FIG. 33 is an enlarged view at K of FIG. 31;

FIG. 34 is a top view of a battery pack provided in accordance with further embodiments of the present application;

fig. 35 is a schematic structural diagram of a battery pack according to further embodiments of the present application.

Icon: 100-a battery pack; 10-a cell unit; 11-a scaffold; 111-a first surface; 112-a second surface; 113-a first portion; 1131 — a first opening; 1132-open end of the first portion; 1133 — a first straight portion; 11331 — a first retaining groove; 1134, a first bending part; 1135 — a first receptacle; 1136 — a first transition; 1137 — first connection; 1138 — a second connector; 1139 — a third connecting portion; 114-a second portion; 1141-a second opening; 1142 — an open end of the second portion; 1143-a second straight portion; 11431-a second limiting groove; 1144-a second bending part; 1145-a second receptacle; 1146-a second transition; 1147-a fourth connecting portion; 1148-a fifth connecting portion; 1149-a sixth connecting portion; 115-a first channel; 1151-a first space; 1152-a containment chamber; 12-electric core; 121-power output; 1211-a body portion; 1212-dog-ear; 122-a housing; 1221-a body portion; 1222-an extension; 1223-dog-ear; 124-electrode terminals; 125-sealant; 126-an insulator; 13-a first support; 131-a first positioning hole; 14-an expansion space; 15-a second support; 151-first receptacle; 16-a thermally conductive member; 17-a first fixed part; 18-a second fixed part; 20-clearance; 30-a first seal; 31-a first seal; 32-a second seal; 33-a third seal; 34-a fourth seal; 40-a sealing structure; 41-fifth seal; 42-a sixth seal; 43-a second seal; 50-a side wall; 51-a first region; 52-a second region; 53-third area; 54-a fourth region; 55-a third opening; 60-a containing cavity; 70-a third seal; 80-a circuit board; 90-a fourth seal; 110 — a first conductor; 120-a second conductor; 130-a top wall; 100 a-total positive electrode; 100 b-total negative electrode; 100c — positive terminal; 100 d-negative terminal; x-a first direction; y-a second direction; z-a third direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is conventionally understood by those skilled in the art, is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

At present, secondary batteries are increasingly widely used in view of the development of market conditions. Secondary batteries have been widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric automobiles, and in a plurality of fields such as electric tools, unmanned planes, and energy storage devices. As the field of application of secondary batteries is continuously expanded, the demand of the market is also continuously expanded.

In the development of battery technology, various design factors, such as energy density, cycle life, discharge capacity, charge/discharge rate, and other performance parameters, are considered, and whether a battery can be normally charged/discharged is also one of important factors to be considered as environmental conditions and/or internal conditions of the battery change.

The inventor finds that the temperature change inside the battery is large in the charging and discharging process of the battery, and the battery can cause the problem of overhigh battery cell temperature when used under the working conditions of high multiplying power, no standing and continuous charging and discharging (such as an agricultural unmanned aerial vehicle battery). In order to ensure normal charging and discharging of the battery pack, the temperature of the battery cell needs to be rapidly reduced.

In the prior art, there are two main ways for battery pack heat dissipation, the first is to set heat conducting members at the tab ends of the battery cells of the battery pack, and to dissipate heat through the heat conducting members, but the heat dissipation area is small and the heat dissipation efficiency is low. The second kind, through set up the pipeline between two adjacent electric core faces, blow to the pipeline through air cooling device, though heat radiating area is big, and the radiating efficiency is high, but the structure is complicated, and occupation space is big.

In view of the above, in order to improve the heat dissipation capability of the battery pack and simplify the structure of the heat dissipation structure, an embodiment of the present application provides a battery pack, where the battery pack includes cell units stacked in a first direction, the cell units include a bracket and a cell, and the bracket is provided with a first support part; the battery cell is accommodated in the bracket; the first support portion is configured to support adjacent brackets along a first direction so that a gap is formed between the adjacent brackets.

The first supporting part of support supports in adjacent support to form the clearance between two adjacent supports, electric core holds in the support, then the heat that charge and discharge in-process electricity core produced can pass through the support and transmit to the clearance between two adjacent supports in, heat radiating area is big, the heat transfer route is short, the thermal resistance is lower, then the heat that electricity core produced can shift away through this clearance fast, thereby reduce the temperature of electricity core fast, and then improve the heat-sinking capability of group battery.

And the support not only bears the effects of accommodating and protecting the battery cell, but also can be favorable for heat dissipation, and has a simple structure and a small occupied space.

The battery pack disclosed by the embodiment of the application can be but is not limited to be used in electric equipment such as electric bicycles, electric tools, unmanned aerial vehicles and energy storage equipment. The battery pack provided by the working condition of the application can be used as a power supply system of the electric equipment, so that the heat dissipation capacity of the charge-discharge process of the power supply system and the electricity safety of the electric equipment are improved.

The embodiment of the application provides an use consumer of group battery as power, consumer can be but not limited to electronic equipment, electric tool, electric vehicle, unmanned aerial vehicle, energy storage equipment. The electronic equipment can comprise a mobile phone, a tablet, a notebook computer and the like, the electric tool can comprise an electric drill, an electric saw and the like, and the electric vehicle can comprise an electric automobile, an electric motorcycle, an electric bicycle and the like.

As shown in fig. 1, 2, and 3, the battery pack 100 includes a plurality of cell units 10, the plurality of cell units 10 being arranged in a stack in a first direction X, the cell units 10 including a bracket 11 and cells 12, the bracket 11 being provided with a first support portion 13; the battery cell 12 is accommodated in the bracket 11; the first support portion 13 is configured to support the adjacent brackets 11 in the first direction X, so that a gap 20 is formed between the adjacent brackets 11.

The battery cell 12 may be a soft package battery cell 12, or may be a steel-clad battery cell 12.

The holder 11 is formed with a housing space that houses the battery cell 12. The battery cell 12 is accommodated in the accommodation space. At least one side of the cell 12 may not contact the inner wall of the support 11 along the first direction X, so that an expansion space 14 is formed between the cell 12 and the inner wall of the support 11. The expansion space 14 is used for expanding the battery cell 12 during charging and discharging so that the inner wall of the bracket 11 does not press the battery cell 12 prematurely. Optionally, along the first direction X, a compressible elastic element is disposed between the battery cell 12 and the support 11, and the elastic element may provide an expansion space for the battery cell 12 and may also play a role in buffering between the battery cell 12 and the support 11. Optionally, a gap is provided between the battery cell 12 and the bracket 11 along the first direction X, so as to provide an expansion space for the battery cell 12. Optionally, the resilient member comprises foam.

The first support portion 13 is provided on a side of the bracket 11 facing the adjacent bracket 11 in the first direction X. The first support parts 13 protrude from the surfaces of the brackets 11 facing the brackets 11 between adjacent ones. The first supporting portion 13 and the bracket 11 may be separately disposed and then connected to form an integral structure, or the first supporting portion 13 and the bracket 11 may be integrally formed. The first support part 13 is supported on a surface of the bracket 11 adjacent thereto, which faces the first support part 13, such that a gap 20 is formed between two adjacent brackets 11 along the first direction X. The gap 20 may be used for heat dissipation. The gap 20 penetrates in at least one direction among directions perpendicular to the first direction X, so that heat generated during charge and discharge can be transferred from the penetrating direction of the gap 20.

The first supporting part 13 of support 11 supports in adjacent support 11, form clearance 20 between two adjacent supports 11, electric core 12 holds in support 11, the heat that electric core 12 produced in the charge-discharge process can pass through support 11 and transmit to the clearance 20 between two adjacent supports 11 in, heat radiating area is big, heat transfer route is short, the thermal resistance is lower, the heat that electric core 12 produced can shift away through this clearance 20 fast, thereby reduce electric core 12's temperature fast, and then improve the heat-sinking capability of group battery 100, thereby be favorable to providing the security performance of group battery 100. The support 11 plays a role in accommodating and protecting the battery cell 12, and is also beneficial to heat dissipation, simple in structure and small in occupied space.

As shown in fig. 2-4, in some embodiments, the bracket 11 is further provided with a second support portion 15, the second support portion 15 and the first support portion 13 are respectively provided on both sides of the bracket 11 along the first direction X, and the second support portion 15 is configured to cooperate with the first support portion 13 of the adjacent bracket 11. It is possible to improve the accuracy of positioning and the stacking stability of the stack of two adjacent cell units 10, thereby improving the stability of the entire structure of the battery pack 100.

In this embodiment, the second support portion 15 is configured to be in locating engagement with the first support portion 13 of the adjacent bracket 11. For the support 11 of any one of the cell units 10, the second support portion 15 and the first support portion 13 are respectively disposed on two opposite sides of the support 11 along the first direction X. Along the first direction X, the bracket 11 has a first surface 111 and a second surface 112 opposite to each other, the first supporting portion 13 is disposed on the first surface 111, and the second supporting portion 15 is disposed on the second surface 112. For two adjacent cell units 10, the second support part 15 and the first support part 13 which are matched in positioning are positioned in the gap 20.

As shown in fig. 2, 3, and 4, a first positioning hole 131 is formed in an end surface of the first support portion 13 away from one end connected to the bracket 11 along the first direction X, and the second support portion 15 is disposed in the first positioning hole 131. As shown in fig. 4, after the second support portion 15 is disposed in the first positioning hole 131, the second support portion 15 can abut against the adjacent bracket 11. As shown in fig. 5 and 6, after the second support portion 15 is disposed in the first positioning hole 131, the second support portion 15 may be spaced apart from the adjacent bracket 11 along the first direction X.

As shown in fig. 2 to 6, in the embodiment in which the second support part 15 is inserted into the first positioning hole 131 of the first support part 13, the second support part 15 has a hollow structure, so that the weight of the cell unit 10 and thus the weight of the battery pack 100 can be reduced. In other embodiments, the second support portion 15 may also be a solid structure.

As shown in fig. 7 and 8, in other embodiments, the second support portion 15 is provided with a first insertion hole 151, and the first support portion 13 is inserted into the first insertion hole 151, and a space exists between the second support portion 15 and the adjacent bracket 11 along the first direction X. In such an embodiment, the second support part 15 may be a hollow structure to reduce the weight of the cell unit 10, thereby reducing the weight of the battery pack 100.

As shown in fig. 9, 10, and 11, in other embodiments, the bracket 11 may not be provided with the second support portion 15. The first support part 13 is supported on the second surface 112 of the adjacent bracket 11 such that the gap 20 is formed between the adjacent two brackets 11. In such an embodiment, the first support part 13 may be a hollow structure or a solid structure.

As shown in fig. 12, 13, and 14, in other embodiments, the second support portion 15 may be a recess formed in the second surface 112 of the bracket 11, and the first support portion 13 is inserted into the recess (the second support portion 15) of the adjacent bracket 11.

As shown in fig. 15, in some embodiments, the bracket 11 is provided with a plurality of first supporting parts 13, and the plurality of first supporting parts 13 are spaced apart.

Plural means two or more. In other embodiments, the number of the first support parts 13 may be one. In the embodiment where the first support portion 13 is provided in plurality, the second support portion 15 may be provided in plurality.

A plurality of first supporting parts 13 interval distribution of support 11 support adjacent support 11 jointly, can improve support stability to make and form stable clearance 20 between two adjacent supports 11, be favorable to electric core 12 to stabilize quick heat dissipation. The plurality of first support portions 13 jointly support the adjacent support frames 11, and also can improve the stacking stability of the adjacent two cell units 10.

In the embodiment where the number of the first support parts 13 is plural, the arrangement form of the plural first support parts 13 is plural, for example, all the first support parts 13 are arranged at intervals along a certain straight line. Or all of the first supporting parts 13 may be arranged in an array, for example, as shown in fig. 15, in some embodiments, a plurality of first supporting parts 13 are distributed in a rectangular array on the bracket 11. Some of the first support parts 13 are spaced apart from one side of the bracket 11 in the third direction Z in the second direction Y, and other of the first support parts 13 are spaced apart from the other side of the bracket 11 in the third direction Z in the second direction Y. As shown in fig. 15, the bracket 11 is provided with six first support parts 13, three first support parts 13 of the six first support parts 13 are arranged at intervals in the second direction Y on one side of the bracket 11 in the third direction Z, and the other three first support parts 13 of the six first support parts 13 are arranged at intervals in the second direction Y on the other side of the bracket 11 in the third direction Z. The first direction X, the second direction Y and the third direction Z are vertical to each other.

In other embodiments, the plurality of first supporting portions 13 may be distributed in a circular array, a path array, or the like.

The plurality of first supporting portions 13 may be arranged at uniform intervals, or may be arranged at non-uniform intervals.

A plurality of first supporting parts 13 rectangular array distribute in support 11, not only can improve two adjacent electric core unit 10 pile up stability, still are favorable to electric core 12 uniform heat dissipation.

In some embodiments, as shown in fig. 16, the battery cell unit 10 further includes a heat conducting member 16, and the heat conducting member 16 is disposed on an inner surface of the support 11, so as to facilitate efficiency of heat transfer from the battery cell 12 to the outside.

The heat conducting member 16 may be made of a material with good thermal conductivity, for example, the material of the heat conducting member 16 includes at least one of polyethylene terephthalate, polyimide, and polycarbonate.

The heat-conducting member 16 is fixed to the inner surface of the bracket 11. The thermal conductor 16 may be adhered to the inner surface of the bracket 11 or fixed to the inner surface of the bracket 11 by other connecting means.

The heat conducting member 16 is disposed on the inner surface of the support 11, and can enable heat generated by the battery cells 12 to be rapidly transferred to the support 11 and rapidly transferred out from the gap 20 between adjacent support 11, so as to improve the heat dissipation efficiency of the battery cells 12.

As shown in fig. 15 and 16, the bracket 11 includes a first portion 113 and a second portion 114, the first portion 113 and the second portion 114 are arranged along a first direction X, the first portion 113 and the second portion 114 together define a receiving space (not shown in the drawings), and the battery cell 12 is received in the receiving space.

In this embodiment, the bracket 11 includes a first portion 113 and a second portion 114 that are separately disposed, and the first portion 113 and the second portion 114 are connected to define a receiving space for receiving the battery cell 12. It is understood that the body 1211 of the bracket 11 is formed by connecting the first portion 113 and the second portion 114. The first portion 113 and the second portion 114 may be welds. Or the detachable connection is realized by adopting the modes of bolt connection, screw connection, glue bonding, buckle connection and the like.

As shown in fig. 16, 17 and 18, the first portion 113 is formed with a first cavity (not labeled) having a first opening 1131, the first opening 1131 faces the second portion 114 along a direction opposite to the first direction X, the second portion 114 is formed with a second cavity (not labeled) having a second opening 1141, and the second opening 1141 faces the first portion 113 along the first direction X. The open end 1132 of the first portion and the open end 1142 of the second portion are attached to each other in the first direction X (shown in fig. 15) to form a receiving space together, so as to facilitate the electrical core 12 to enter the bracket 11, and facilitate maintenance of different parts of the bracket 11. The first portion open end 1132 and the second portion open end 1142 are attached to each other in the first direction X, so that the sealing performance between the first portion 113 and the second portion 114 is better or the sealing difficulty after the first portion 113 and the second portion 114 are connected is reduced.

The first support 13 is provided to the first portion 113, and the second support 15 is provided to the second portion 114. The first surface 111 of the holder 11 is a surface of the first portion 113 facing away from the second portion 114 along the first direction X, and the first surface 111 is disposed opposite to the open end 1132 of the first portion. The second surface 112 of the holder 11 is a surface of the second portion 114 facing away from the first portion 113 in a direction opposite to the first direction X, the second surface 112 being arranged opposite to the open end 1142 of the second portion.

As shown in fig. 16, 17 and 18, in some embodiments, the first portion 113 is provided with a first fixing portion 17, the second portion 114 is provided with a second fixing portion 18, and the first fixing portion 17 and the second fixing portion 18 are fixedly matched along the first direction X.

The first fixing portion 17 is disposed at the open end 1132 of the first portion, and the second fixing portion 18 is disposed at the open end 1142 of the second portion. One of the first fixing portion 17 and the second fixing portion 18 is a protrusion, and the other is a groove, and the protrusion is inserted into the groove along the first direction X to realize the fixed matching of the first fixing portion 17 and the second fixing portion 18. As shown in fig. 16, 17 and 18, the first retainer 17 is a protrusion extending from the open end 1132 of the first portion in a direction toward the second portion 114, and the second retainer 18 is a recess recessed from the open end 1142 of the second portion in a direction away from the first portion 113. The depth of the recess (second retainer 18) recessed from the open end 1142 of the second portion in a direction away from the first portion 113 is equal to the extent of the projection (first retainer 17) extending from the open end 1132 of the first portion in a direction facing the second portion 114, facilitating the fit between the open end 1132 of the first portion and the open end 1142 of the second portion.

The number of the first fixing portions 17 may be one or plural, and the number of the second fixing portions 18 may be one or plural. The number of the first fixing portions 17 and the second fixing portions 18 is the same. The first fixing portions 17 and the second fixing portions 18 are arranged in a one-to-one correspondence manner, and the first fixing portions 17 are in positioning fit with the corresponding third portions.

In the embodiment where the number of the first fixing portions 17 and the number of the second fixing portions 18 are plural, the arrangement manner of the plural first fixing portions 17 is the same as the arrangement manner of the plural second fixing portions 18, so that the first fixing portions 17 can be fixedly fitted with the second fixing portions 18 corresponding thereto.

The arrangement of the plurality of first fixing portions 17 is various, for example, all the first fixing portions 17 are arranged at intervals along a straight line. Alternatively, the plurality of first anchors 17 are arranged in an array, for example, in some embodiments, the plurality of first anchors 17 are distributed in a rectangular array at the open end 1132 of the first portion. A part of the plurality of first fixing portions 17 is spaced apart from the open end 1132 of the first portion along the second direction Y on one side along the third direction Z, and another part of the plurality of first fixing portions 17 is spaced apart from the open end 1132 of the first portion along the second direction Y on the other side along the third direction Z. As shown in fig. 17, the first portion 113 includes six first fixing portions 17, three first fixing portions 17 of the six first fixing portions 17 are arranged at intervals along the second direction Y on one side of the open end 1132 of the first portion along the third direction Z, and another three first fixing portions 17 of the six first fixing portions 17 are arranged at intervals along the second direction Y on the other side of the open end 1132 of the first portion along the third direction Z (refer to fig. 17 and 24 in combination).

During the process of assembling the first portion 113 and the second portion 114 to form the bracket 11, the first fixing portion 17 of the first portion 113 and the second fixing portion 18 of the second portion 114 are matched, which is beneficial to improving the accurate positioning of the first fixing portion 17 and the second fixing portion 18 during the assembling process, facilitating the assembling and forming of the bracket 11, and enabling the first portion 113 and the second portion 114 to maintain a relatively stable matching relationship, thereby enabling the structure of the bracket 11 to be stable.

In the embodiment where the bracket 11 is provided with the second supporting portion 15, please refer to fig. 16, 17, and 18, the first supporting portion 13 is provided on the first portion 113, the second portion 114 is provided with the second supporting portion 15, and the second supporting portion 15 is configured to be positioned and matched with the first supporting portion 13 of the adjacent bracket 11; along the first direction X, the first fixing portion 17 and the first supporting portion 13 are respectively disposed at both sides of the first portion 113, and the second fixing portion 18 and the second supporting portion 15 are respectively disposed at both sides of the second portion 114.

The first supporting portion 13 is disposed on a side of the first portion 113 departing from the second portion 114 along the first direction X, and the second supporting portion 15 is disposed on a side of the second portion 114 departing from the first portion 113 along the first direction X.

The first fixing portions 17 and the first supporting portions 13 are disposed on the first portion 113, and the number of the first fixing portions 17 and the number of the first supporting portions 13 may be the same or different. The embodiment of the present application shows the case where the number of the first fixing portions 17 is the same as that of the first supporting portions 13, and the first fixing portions 17 and the first supporting portions 13 are six.

The second fixing portions 18 and the second supporting portions 15 are disposed on the second portion 114, and the number of the second fixing portions 18 and the number of the second supporting portions 15 may be the same or different. The embodiment of the present application shows the case where the number of the second fixing portions 18 and the number of the second supporting portions 15 are the same, and the number of the second fixing portions 18 and the number of the second supporting portions 15 are six.

The first fixing portion 17 and the first supporting portion 13 are respectively disposed at both sides of the first portion 113, and the second fixing portion 18 and the second supporting portion 15 are respectively disposed at both sides of the second portion 114, so that the manufacturing is convenient, and the second supporting portion 15 and the first supporting portion 13 can be matched, and the first fixing portion 17 and the second fixing portion 18 of the adjacent bracket 11 can be matched without interference.

As shown in fig. 16, 17, and 18, the first fixing portion 17 is provided corresponding to the first support portion 13, and the second support portion 15 is provided corresponding to the second fixing portion 18, along the first direction X.

The first fixing portions 17 and the first supporting portions 13 are arranged in a one-to-one correspondence manner, the first fixing portions 17 correspond to the first supporting portions 13 in position, and along the first direction X, the projection of the first fixing portions 17 is at least partially overlapped with the projection of the corresponding first supporting portions 13. The second supporting portions 15 and the second fixing portions 18 are arranged in a one-to-one correspondence manner, the second supporting portions 15 correspond to the second fixing portions 18 in position, and along the first direction X, at least part of the projection of the second supporting portions 15 is overlapped with the projection of the corresponding second fixing portions 18.

In other embodiments, the first fixing portion 17 and the first supporting portion 13 may not be correspondingly arranged along the first direction X, that is, the number of the first fixing portions 17 is different from that of the first supporting portion 13, and/or the projection of the first fixing portion 17 on the first portion 113 and the projection of the first supporting portion 13 on the first portion 113 are completely staggered along the first direction X. The second supporting portions 15 and the second fixing portions 18 may not be correspondingly arranged, that is, the number of the second supporting portions 15 and the number of the second fixing portions 18 are different, and/or the projection of the second supporting portions 15 on the second portion 114 and the projection of the second fixing portions 18 on the second portion 114 are completely staggered along the first direction X.

The first fixing portion 17 is disposed corresponding to the first supporting portion 13, and the second supporting portion 15 is disposed corresponding to the second fixing portion 18, thereby facilitating the manufacture of the first and

second portions

113 and 114.

As shown in fig. 19 and 20, in some embodiments, at least one end of the battery cell unit 10 along the second direction Y is formed with an electric energy output part 121, a first channel 115 through which the electric energy output part 121 passes is formed between the first portion 113 and the second portion 114, and the second direction Y is perpendicular to the first direction X. The battery pack 100 also includes a first seal 30 (shown in fig. 16), the first seal 30 configured to seal the first channel 115.

As shown in fig. 21-23, the battery cell 12 includes a casing 122, an electrode assembly disposed in the casing 122, and two electrode terminals 124 connected to the electrode assembly and extending from the casing 122, where the two electrode terminals 124 have opposite polarities, that is, one electrode terminal 124 of the two electrode terminals 124 is a positive electrode terminal, and the other electrode terminal is a negative electrode terminal.

The electrode assembly includes a separator (not shown), a positive electrode tab (not shown) and a negative electrode tab (not shown) of opposite polarities. The positive electrode sheet includes a positive electrode active material layer (not shown in the drawings) and a positive electrode current collector (not shown in the drawings). The negative electrode sheet includes a negative electrode active material layer (not shown in the drawings) and a negative electrode current collector (not shown in the drawings). Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The material of the isolation film may be PP (polypropylene) or PE (polyethylene). The positive tab is in conductive connection with the current collector of the positive plate, and the negative tab is in conductive connection with the current collector of the negative plate.

The electrode assembly may be a wound electrode assembly in which a separator, a positive electrode sheet, and a negative electrode sheet are stacked and wound around a winding axis to form a wound electrode assembly. The electrode assembly may also be a laminated electrode assembly.

The two electrode terminals 124 extend from the same end of the housing 122 out of the housing 122, and may also extend from opposite ends of the housing 122 out of the housing 122. Fig. 21 and 23 show a case where two electrode terminals 124 extend out of the case 122 from both ends of the case 122 in the second direction Y, respectively.

As shown in fig. 21 and 22, in the second direction Y, the housing 122 includes a body 1221 and extending portions 1222 connected to both ends of the body 1221 in the second direction Y. The body portion 1221 defines a body cavity (not shown) that receives the electrode assembly, and each of the extensions 1222 defines an extension cavity (not shown) that receives a portion of one of the electrode terminals 124 in the second direction Y, the body cavity and the extension cavity communicating with each other. The electrode terminals 124 and the corresponding extension portions 1222 are hermetically connected by a sealing adhesive 125. The extending portions 1222 have folded corners 1223 formed at both ends thereof in the third direction Z.

As shown in fig. 23, in some embodiments, the battery cell unit 10 further includes an insulating member 126, and the insulating member 126 is coated on the outer surface of the casing 122 to prevent water, insulation, and leakage. In some embodiments, a portion of the insulating member 126 covers the outer surface of the body 1221, and another portion of the insulating member 126 covers the outer surfaces of the two extending portions 1222, that is, the insulating member 126 covers the entire outer surface of the housing 122. In this embodiment, an electrode terminal 124, an extension 1222 and an insulating member 126 covering the outer surface of the extension 1222 together form a power output portion 121 of the cell 12. In such an embodiment, the extension 1222 of the power output portion 121 and the insulating member 126 covering the outer surface of the extension 1222 are both located in the first channel 115; the electrode terminal 124 of the power output portion 121 extends out of the first channel 115 in the second direction Y; the sealant 125 of the power output portion 121 may extend out of the first channel 115 along the second direction Y, or may be completely located in the first channel 115, and fig. 20 shows a case where the sealant 125 extends out of the first channel 115 along the second direction Y.

In other embodiments, the insulating member 126 may be entirely disposed on the outer periphery of the body portion 1221, that is, the insulating member 126 is disposed on a portion of the outer surface of the housing 122. In this embodiment, one electrode terminal 124 and one extension 1222 jointly form one power output 121 of the battery cell 12. In such an embodiment, the extension 1222 of the power output 121 is entirely located within the first channel 115; the electrode terminal 124 of the power output part 121 extends out of the first channel 115 in the second direction Y; the sealant 125 of the power output portion 121 may extend out of the first channel 115 along the second direction Y, or may be completely located in the first channel 115.

As shown in fig. 21, the battery cell 12 may not include the insulating member 126, and one electrode terminal 124 and one extension 1222 jointly form one power output portion 121 of the battery cell 12. In such embodiments, the extension 1222 of the power output 121 may be located entirely within the first channel 115; the electrode terminal 124 of the power output part 121 extends out of the first channel 115 in the second direction Y; the sealant 125 of the power output portion 121 may extend out of the first channel 115 along the second direction Y, or may be completely located in the first channel 115.

The two electrode terminals 124 of the battery cell 12 extend out of the casing 122 from the two opposite ends of the casing 122 along the second direction Y, the two power output parts 121 also extend along the two opposite ends of the second direction Y, the polarities of the two power output parts 121 are opposite, and the risk of the two power output parts 121 with opposite polarities contacting each other is reduced, so that the risk of short circuit of the battery pack 100 is reduced. Accordingly, two first passages 115 are formed between the first portion 113 and the second portion 114, and the two first passages 115 are oppositely arranged at intervals in the second direction Y.

By "the first seal 30 is configured to seal the first passage 115", it is meant that the first seal 30 seals the space between the first portion 113 and the power output portion 121 and the space between the second portion 114 and the power output portion 121.

The electric energy output part 121 extends out of the first channel 115, so that the electric energy output part 121 is conveniently electrically connected with other structures to output electric energy of the battery cell 12. The first sealing member 30 seals the first passage 115, so that the risk of leakage from the battery cell 12 and the risk of external impurities entering the battery cell 12 can be reduced.

Referring to fig. 20, fig. 21 and fig. 23, in some embodiments, the power output portion 121 includes a main body portion 1211, and the main body portion 1211 is bent at two ends in the third direction Z to form a bent portion 1212; the first channel 115 includes a first space 1151 and accommodating chambers 1152 provided at both ends of the first space 1151 in the third direction Z, the accommodating chambers 1152 communicate with the first space 1151, the main body portion 1211 is accommodated in the first space 1151, and the two chamfered portions 1212 are respectively accommodated in the two accommodating chambers 1152; wherein the size of the accommodation chamber 1152 is larger than that of the first space 1151 along the first direction X, and the first direction X, the second direction Y and the third direction Z are perpendicular two by two.

Along the first direction X, the accommodation chamber 1152 is larger than the size of the first space 1151, i.e., H1 > H2 in the drawing.

The power output unit 121 has a bevel 1212 formed at a position corresponding to the bevel 1223. Referring to fig. 23, in the embodiment where the battery cell 12 does not include the insulating member 126, the bent portion 1212, i.e., the bent corner 1223, and the main body 1211 are formed by the electrode terminal 124 and the sealant 125. Referring to fig. 21, in an embodiment where the battery cell 12 includes the insulating member 126, the folded corner portion 1212 may be formed by the folded corner 1223 and the insulating member 126 covering the folded corner 1223, and the main body 1211 is formed by the electrode terminal 124, the sealant 125 and a portion covering the extending portion 1222 and located between the two folded corner portions 1212 in the third direction Z.

The folded portion 1212 of the power output portion 121 has an irregular shape and a larger size in the first direction X relative to the main body portion 1211, and therefore, the size of the accommodating chamber 1152 accommodating the folded portion 1212 in the first direction X is larger than the size of the first space 1151 in the first direction X, the size of the accommodating chamber 1152 in the first direction X matches the size of the corresponding folded portion 1212 in the first direction X, and the size of the first space 1151 in the first direction X matches the size of the first space 1151 in the first direction X, so that the power output portion 121 protrudes from the first channel 115 of the bracket 11, and the difficulty in sealing the first channel 115 is reduced. The power output unit 121 has the bent portions 1212 formed at both ends of the body 1211 in the third direction Z, so that the size of the power output unit 121 in the third direction Z can be reduced.

In other embodiments, the size of the accommodating chamber 1152 may be the same as the size of the first space 1151 along the first direction X.

In the embodiment where the bracket 11 includes the first portion 113 and the second portion 114, as shown in fig. 17-20, the first portion 113 includes a first straight portion 1133 and two first bending portions 1134, and the two first bending portions 1134 are connected to two ends of the first straight portion 1133 along the third direction Z, and the second portion 114 includes a second straight portion 1143 and two second bending portions 1144, and the two second bending portions 1144 are connected to two ends of the second straight portion 1143 along the third direction Z; the first flat portion 1133 and the second flat portion 1143 are oppositely disposed along the first direction X and form a first space 1151, and a first bent portion 1134 and a second bent portion 1144 form a containing chamber 1152.

The first flat portion 1133 and the second flat portion 1143 are both flat plate structures extending along the third direction Z.

First kink 1134 includes consecutive first connecting portion 1137, second connecting portion 1138 and third connecting portion 1139, and first connecting portion 1137 and third connecting portion 1139 are arranged along third direction Z relatively, and first connecting portion 1137 links to each other with second connecting portion 1138 along the one end of first direction X, and third connecting portion 1139 links to each other with second connecting portion 1138 along the one end of first direction X. An end surface of third connection portion 1139 facing away from second connection portion 1138 in first direction X is part of open end 1132 of the first portion. An end of the first connecting portion 1137 away from the second connecting portion 1138 is connected to the first straight portion 1133 along the first direction X, and the first straight portion 1133 is closer to the second portion 114 than the second connecting portion 1138 along the first direction X. The second bent portion 1144 includes a fourth connecting portion 1147, a fifth connecting portion 1148 and a sixth connecting portion 1149 connected in sequence, the fourth connecting portion 1147 and the sixth connecting portion 1149 are oppositely arranged along the third direction Z, one end of the fourth connecting portion 1147 along the first direction X is connected to the fifth connecting portion 1148, and one end of the sixth connecting portion 1149 along the first direction X is connected to the fifth connecting portion 1148. An end surface of the sixth connecting portion 1149 facing away from the fifth connecting portion 1148 in the first direction X is part of the second portion open end 1142. Along the first direction X, the second flat portion 1143 is closer to the first portion 113 than the fifth connecting portion 1148, so that a distance between the first flat portion 1133 and the second flat portion 1143 is smaller than a distance between the second connecting portion 1138 and the fifth connecting portion 1148 along the first direction X, thereby making a size of the first space 1151 along the first direction X smaller than a size of the accommodating chamber 1152 along the first direction X.

The first space 1151 is formed by a first straight portion 1133 of the first portion 113 and a second straight portion 1143 of the second portion 114, and each accommodating chamber 1152 is formed by a first bent portion 1134 of the first portion 113 and a second bent portion 1144 of the second portion 114, so that the power output portion 121 can enter the first channel 115 and extend out of the first channel 115.

As shown in fig. 24, 25, and 26, in some embodiments, the first straight portion 1133 is provided with a first limiting groove 11331 extending along the third direction Z, and a portion of the first sealing element 30 is accommodated in the first limiting groove 11331; and/or a second limiting groove 11431 extending along the third direction Z is disposed on the second flat portion 1143, and a portion of the first sealing member 30 is received in the second limiting groove 11431.

In this embodiment, the first straight portion 1133 is provided with a first limiting groove 11331 and the second straight portion 1143 is provided with a second limiting groove 11431. The first limiting groove 11331 is disposed on a surface of the first straight portion 1133 facing the second straight portion 1143 along the first direction X. The first stopper groove 11331 extends in the third direction Z and penetrates both ends of the first flat portion 1133, so that the first stopper groove 11331 and the two housing chambers 1152 communicate with each other. The second limit groove 11431 is disposed on the surface of the second flat portion 1143 facing the first flat portion 1133 along the first direction X, and the second limit groove 11431 extends along the third direction Z and penetrates through two ends of the second flat portion 1143, so that the second limit groove 11431 is communicated with the two accommodating chambers 1152, so that a portion of the first sealing member 30 located in the first limit groove 11331, a portion of the second limit groove 11431 and a portion located in the accommodating chambers 1152 are connected to form an integral structure, which is beneficial to improving the sealing performance.

In other embodiments, the first straight portion 1133 may be provided with the first limiting groove 11331, and the second straight portion 1143 is not provided with the second limiting groove 11431; or the first straight portion 1133 is not provided with the first limiting groove 11331, and the second straight portion 1143 is provided with the second limiting groove 11431.

In other embodiments, the first flat portion 1133 may not be provided with the first retaining groove 11331 and the second flat portion 1143 may not be provided with the second retaining groove 11431. A portion of the first seal member 30 is sealed between the surface of the first flat portion 1133 facing the second flat portion 1143 and the body portion 1211 of the power output, and a portion of the first seal member 30 is sealed between the surface of the second flat portion 1143 facing the first flat portion 1133 and the body portion 1211 of the power output, so as to achieve that the first seal member 30 seals the first space 1151.

The first sealing element 30 is partially accommodated in the first limiting groove 11331, and the first limiting groove 11331 can limit the first sealing element 30, so that the first sealing element 30 is partially sealed with the first space 1151; and/or portions of the first seal member 30 are received in the second retaining groove 11431, the second retaining groove 11431 being capable of retaining the first seal member 30 such that portions of the first seal member 30 provide a stable seal with the first space 1151.

In some embodiments, referring to fig. 16 and 26, the first sealing element 30 includes a first sealing portion 31, a second sealing portion 32, a third sealing portion 33 and a fourth sealing portion 34, the first sealing portion 31 and the second sealing portion 32 are sealed in the first space 1151 and respectively located on two sides of the main body 1211 along the first direction X, the third sealing portion 33 is located in one of the accommodating chambers 1152 and covers the folded portion 1212, and the fourth sealing portion 34 is located in the other accommodating chamber 1152 and covers the folded portion 1212.

The first seal portion 31, the second seal portion 32, the third seal portion 33, and the fourth seal portion 34 may be separate seal portions independent from each other. The first sealing portion 31, the second sealing portion 32, the third sealing portion 33, and the fourth sealing portion 34 may be separately provided and then connected to form an integral structure. The first seal portion 31, the second seal portion 32, the third seal portion 33, and the fourth seal portion 34 may be integrally formed, and the formed first seal 30 may be integrally formed. The integrally formed structure is formed by an integrally forming process, and the integrally forming process can be injection molding, encapsulation and the like. Optionally, the first sealing portion 31 includes a sealant. Optionally, the second sealing portion 32 includes a sealant. Optionally, the third sealing portion 33 comprises a sealant. Optionally, the fourth sealing portion 34 includes a sealant.

The first sealing portion 31 is received in the first limiting groove 11331 to seal the space between the first flat portion 1133 and the power output portion 121. The second sealing portion 32 is received in the second retaining groove 11431 to seal the space between the second flat portion 1143 and the power output portion 121.

The first sealing portion 31, the second sealing portion 32, the third sealing portion 33, and the fourth sealing portion 34 may also be connected to the power output portion 121, for example, the first sealing portion 31, the second sealing portion 32, the third sealing portion 33, and the fourth sealing portion 34 are all bonded to the power output portion 121.

In some implementations, the first sealing portion 31 may also be connected to the first straight portion 1133, such as the first sealing portion 31 being bonded to the first straight portion 1133.

In some implementations, the second seal 32 can also be coupled to the second flat portion 1143, such as the second seal 32 being bonded to the second flat portion 1143.

In some implementations, the third sealing portion 33 may also be connected to the first bending portion 1134 and the second bending portion 1144, for example, the third sealing portion 33 is adhered to the first bending portion 1134 and the second bending portion 1144.

In some implementations, the fourth sealing portion 34 may also be connected to the first bending portion 1134 and the second bending portion 1144, such as the fourth sealing portion 34 is adhered to the first bending portion 1134 and the second bending portion 1144.

The third sealing portion 33 and the fourth sealing portion 34 respectively cover the two folded corner portions 1212, and it can be understood that the two folded corner portions 1212 are respectively located in the space defined by the third sealing portion 33 and the fourth sealing portion 34, so that the contact areas between the third sealing portion 33 and the fourth sealing portion 34 and the corresponding folded corner portions 1212 can be increased, and the sealing performance can be improved.

The first sealing portion 31 and the second sealing portion 32 are sealed in the first space 1151 and are located on both sides of the body 1211 in the first direction X, respectively, so that sealing performance with respect to the first space 1151 can be improved, and the third sealing portion 33 and the fourth sealing portion 34 are housed in the two housing chambers 1152, respectively, so as to cover the corresponding bevel portion 1212, so that sealing performance between the bevel portion 1212 and the holder 11 can be improved.

In some embodiments, third and

fourth seals

33, 34 are potted within two containment chambers 1152, respectively.

The potting is to mechanically or manually fill the liquid compound into the housing 1152 having the bevel 1212, and cure the liquid compound at normal temperature or under heating to form the third sealing portion 33 and the fourth sealing portion 34 which are thermosetting and have excellent properties. The fluidity of the liquid compound enables the liquid compound to be sufficiently spread within the housing chamber 1152 to contact each face of the fillet portion 1212 as much as possible to increase the contact area between the fillet portion 1212 and the liquid compound, thereby increasing the contact area between the fillet portion 1212 and the third and

fourth sealing portions

33 and 34.

In the embodiment where the first limiting groove 11331 penetrates the first flat portion 1133 and the second limiting groove 11431 penetrates the second flat portion 1143 along the third direction Z, during the potting process, the liquid compound can flow toward the first limiting groove 11331 and the second limiting groove 11431, so that the third sealing portion 33 and the fourth sealing portion 34 are connected to the first sealing portion 31 received in the first limiting groove 11331 and the second sealing portion 32 received in the second limiting groove 11431. In this case, the first seal portion 31, the second seal portion 32, the third seal portion 33, and the fourth seal portion 34 are provided separately and connected to form an integral structure.

In the embodiment where the first limiting groove 11331 penetrates through the first flat portion 1133 and the second limiting groove 11431 penetrates through the second flat portion 1143 along the third direction Z, before the liquid compound is injected into the accommodating chamber 1152, the first sealing portion 31 is not disposed in the first limiting groove 11331, and the second sealing portion 32 is not disposed in the second limiting groove 11431, during the process of injecting the liquid compound into the accommodating chamber 1152, the liquid compound can flow into the first limiting groove 11331 and the second limiting groove 11431, and the first sealing portion 31 and the second sealing portion 32 are respectively formed in the first limiting groove 11331 and the second limiting groove 11431, that is, the first sealing portion 31 and the second sealing portion 32 are respectively encapsulated in the first limiting groove 11331 and the second limiting groove 11431. In this case, the first seal portion 31, the second seal portion 32, the third seal portion 33, and the fourth seal portion 34 are integrally formed.

The third sealing portion 33 and the fourth sealing portion 34 formed by potting can strengthen the overall performance of the third sealing portion 33, the folded corner portion 1212, and the bracket 11, and the fourth sealing portion 34, the folded corner portion 1212, and the bracket 11, and can improve resistance to external impact and vibration, and waterproof and moistureproof performances. And the potting process makes it easier for the third and fourth sealing

parts

33 and 34 to wrap the corresponding bevel 1212.

As shown in fig. 3 and 27, in some embodiments, two sealing structures 40 are disposed on two adjacent battery cell units 10, and the two sealing structures 40 are respectively disposed at two ends of the support 11 along the second direction Y to close two ends of the gap 20 along the second direction Y.

The two sealing structures 40 block both ends of the gap 20 along the second direction Y, and then the gap 20 penetrates along the third direction Z, so that the heat of the battery cell 12 can be quickly transferred along the third direction Z.

The two sealing structures 40 respectively seal both ends of the gap 20 in the second direction Y, and reduce the risk that other impurities enter the gap 20 along both ends of the gap 20 in the second direction Y to seal the gap 20 or occupy a portion of the gap 20, thereby increasing the heat dissipation area of the gap 20.

The sealing structure 40 may be in various forms, for example, the sealing structure 40 is a sealing gasket pressed between two adjacent brackets 11, or the sealing structure 40 may also be a sealing adhesive filled between two adjacent battery cell units 10. For another example, as shown in fig. 27, in some embodiments, the sealing structure 40 includes a fifth sealing portion 41 and a sixth sealing portion 42, the fifth sealing portion 41 and the sixth sealing portion 42 are respectively disposed on two adjacent brackets 11 along the first direction X, and the fifth sealing portion 41 and the sixth sealing portion 42 are in sealing engagement.

The fifth seal 41 is a seal groove into which the sixth seal 42 can be inserted. In any one of the cell units 10, the bracket 11 is provided with a fifth sealing portion 41 and a sixth sealing portion 42 on both sides in the first direction X. For two adjacent cell units 10, the fifth sealing part 41 on one of the two adjacent brackets 11 is in sealing fit with the sixth sealing part 42 on the other.

Referring to fig. 17, 18, 27, and 28, in an embodiment where the bracket 11 includes the first portion 113 and the second portion 114, the first portion 113 further includes a first accommodating portion 1135 and two first transition portions 1136, and the two first transition portions 1136 are respectively connected to two ends of the first accommodating portion 1135 along the second direction Y. The two first straight portions 1133 are respectively connected to one ends of the two first transition portions 1136 away from the first accommodating portion 1135 along the second direction Y. Each of the first straight portions 1133 is connected to a first bending portion 1134 at two ends along the third direction Z. Along the first direction X, an end surface of the second connection portion 1138 facing the second portion 114, an end surface of the first transition portion 1136 facing the second portion 114, and an end surface of the first accommodation portion 1135 facing the second portion 114 are coplanar and jointly form an open end 1132 of the first portion; the second portion 114 further includes a second receiving portion 1145 and two second transition portions 1146, and the two second transition portions 1146 are respectively connected to two ends of the second receiving portion 1145 along the second direction Y. The two second straight portions 1143 are respectively connected to one ends of the two second transition portions 1146 away from the second receiving portion 1145 along the second direction Y. Two ends of each second straight portion 1143 along the third direction Z are connected to a second bending portion 1144. Along the first direction X, an end surface of the fifth connecting portion 1148 of the second bending portion 1144 facing the first portion 113, an end surface of the second transition portion 1146 facing the first portion 113, and an end surface of the second receiving portion 1145 facing the first portion 113 are coplanar and jointly form the open end 1132 of the first portion.

The first transition portion 1136 and the second transition portion 1146 are disposed in a one-to-one correspondence. The first transition portion 1136 and the corresponding second transition portion 1146 are disposed opposite to each other in the first direction X, and a projection of the second transition portion 1146 completely coincides with the first transition portion 1136 along the first direction X.

The first transition portion 1136 has a larger dimension along the third direction Z than the first accommodation portion 1135. The size of the second transition portion 1146 in the third direction Z is greater than the size of the second receiving portion 1145 in the third direction Z.

The fifth seal 41 is a seal groove disposed on a surface of the first transition 1136 facing away from the second portion 114 in the first direction X and recessed in a direction close to the second portion 114. The sixth sealing portion 42 is protruded from a surface of the second transition portion 1146 facing away from the first portion 113 along the first direction X. The two second transition portions 1146 are provided with fifth sealing portions 41, and the two first transition portions 1136 are provided with sixth sealing portions 42.

The fifth seal portion 41 and the sixth seal portion 42 each extend in the third direction Z. The dimension of the fifth sealing portion 41 in the third direction Z is greater than the dimension of the first accommodating portion 1135 in the third direction Z, and the dimension of the sixth sealing portion 42 in the third direction Z is greater than the dimension of the second accommodating portion 1145 in the third direction Z, so that the sealing range of the fifth sealing portion 41 and the sixth sealing portion 42 in the adjacent two brackets 11 in the third direction Z is greater than the width of the gap 20 in the third direction Z in a sealing fit manner, so as to close both ends of the gap 20 in the second direction Y, so that both ends of the gap 20 in the second direction Y are completely closed or the opening degree of both ends of the gap 20 in the second direction Y is reduced.

The fifth sealing portion 41 and the sixth sealing portion 42 disposed on the two adjacent brackets 11 can be in sealing fit after the two brackets 11 are stacked, so as to close the two ends of the gap 20 along the second direction Y, reduce the risk that other impurities enter the gap 20 along the two ends of the gap 20 located in the second direction Y to close the gap 20 or occupy the gap 20, and also play a role in positioning between the two adjacent brackets 11, thereby improving the stacking stability of the two adjacent brackets 11.

As shown in fig. 27, in some embodiments, fifth seal 41 forms a seal groove into which sixth seal 42 is inserted; the seal structure 40 further includes a second seal 43, the second seal 43 being located within the seal groove and sealing a gap between the sixth seal portion 42 and the seal groove.

In the case where the fifth sealing portion 41 and the sixth sealing portion 42 are in sealing engagement with each other as required, the sealing structure 40 may not include the second sealing member 43.

As shown in fig. 29 and 30, the battery pack 100 further includes two side walls 50, and the two side walls 50 are respectively located on two sides of the battery cell 10 along the second direction Y, and each of the brackets 11 is connected to the two side walls 50.

The sidewall 50 includes a first region 51, a second region 52, a third region 53, and a fourth region 54. The first region 51 is arranged opposite to one end of the cell unit 10 in the second direction Y. The second, third and

fourth regions

52, 53 and 54 are connected to different edges of the first region 51, respectively, and are sequentially connected. The second region 52 and the fourth region 54 are oppositely arranged along the third direction Z and are respectively located on both sides of the cell unit 10 along the third direction Z. The second region 52 and the fourth region 54 are connected by a third region 53. The third region 53 is located at one end of the plurality of cell units 10 as a whole in the first direction X. The side wall 50 is formed with a third opening 55 at an end of the first region 51 remote from the third region 53.

The bracket 11 and the side wall 50 may be connected by welding, screwing, bolting, gluing, or the like.

The two side walls 50 are respectively located at two sides of the battery cell unit 10 along the second direction Y, and can protect the battery cell unit 10 at two sides of the battery cell unit 10 along the second direction Y. Each bracket 11 is connected to both side walls 50, so that a plurality of battery cell units 10 can be maintained in a relatively stable stacked relationship, thereby forming the battery pack 100 into a stable integral structure.

As shown in fig. 31, 32, and 33, in some embodiments, a receiving cavity 60 is formed in a side of the side wall 50 facing the battery cell unit 10, and each power output part 121 is received in the receiving cavity 60; the battery pack 100 further includes a third sealing member 70, and the third sealing member 70 is filled in the receiving cavity 60.

In an embodiment in which the opposite ends of the battery cells 12 in the second direction Y are both formed with the power output portions 121, the two power output portions 121 are respectively accommodated in the accommodating cavities 60 formed between the corresponding side walls 50 and the battery cell units 10.

The third sealing member 70 may be potted in the receiving cavity 60, thereby reducing the difficulty of sealing and improving the quality of sealing. That is, the liquid compound is mechanically or manually poured into the housing 1152 having the power output unit 121, and is cured at normal temperature or under heating to form the thermosetting third sealing member 70 having excellent properties. The fluidity of the liquid compound enables the liquid compound to sufficiently diffuse within the cavity of the housing chamber 1152 and to contact each of the power outputs 121, increasing the contact area of each of the power outputs 121 with the liquid compound, and thus increasing the contact area of the power outputs 121 with the third seal 70.

In other embodiments, other ways of sealing the third seal 70 within the receiving cavity 60 may be used.

The third sealing member 70 is filled in the accommodating cavity 60 of the side wall 50 facing the cell unit 10 to improve the sealing performance between the side wall 50 and the cell unit 10, so as to protect the structure located in the accommodating cavity 60, reduce the risk that other impurities enter the accommodating cavity 60 and then enter the gap 20 from the two ends of the gap 20 in the second direction Y, and reduce the risk that other impurities pollute or damage the electric energy output part 121.

With continued reference to fig. 31, 32, 33, and 34, in some embodiments, the battery pack 100 further includes a circuit board 80, the power output portion 121 is electrically connected to the circuit board 80, and a fourth sealing member 90 is filled between two ends of the circuit board 80 and the two sidewalls 50 along the second direction Y. The circuit board 80 is provided at an end of the plurality of cell units 10 as a whole in the first direction X, which is opposite to the third region 53.

In one embodiment, the circuit board 80 includes a BMS assembly (Battery Management System) including a plurality of electronic components, and the plurality of electronic components can realize functions of data acquisition, control, protection, communication, power calculation, signal transmission, power transmission, and the like of the Battery cell 12.

The plurality of cell units 10 may be connected in series, in parallel, or in series-parallel, where in series-parallel refers to that the plurality of cell units 10 are connected in series or in parallel. The plurality of battery cell units 10 may be directly connected in series or in parallel or in series-parallel to form two total positive electrodes 100a and total negative electrodes 100b with opposite polarities, the total positive electrodes 100a and the total negative electrodes 100b are both connected to the circuit board 80, so as to form a positive electrode terminal 100c and a negative electrode terminal 100d of the battery pack 100, and the positive electrode terminal 100c and the negative electrode terminal 100d may be electrically connected to an electric device, so as to output electric energy of the battery pack 100 to supply power to the electric device, and may also be electrically connected to a charging device, so as to enable the charging device to charge the battery pack 100. The positive electrode terminal 100c and the negative electrode terminal 100d are formed on a side of the circuit board 80 facing away from the cell unit 10.

The overall positive electrode 100a and the circuit board 80 may be electrically connected by the first conductor 110 or the overall positive electrode 100a may be directly electrically connected to the circuit board 80. The negative overall pole 100b and the circuit board 80 may be electrically connected by the second conductor 120 or the negative overall pole 100b may be directly electrically connected to the circuit board 80. Fig. 32, 33, and 34 show that the total positive electrode 100a is electrically connected to the circuit board 80 by the first conductor 110, and the total negative electrode 100b is electrically connected to the circuit board 80 by the second conductor 120. The first conductor 110 and the second conductor 120 are located on at least one side of the circuit board 80 in the second direction Y, and the first conductor 110 and the second conductor 120 are located between at least one end of the circuit board 80 in the second direction Y and the side wall 50, so that the paths of the first conductor 110 and the second conductor 120 are as short as possible. Optionally, the first conductor 110 comprises a wire harness. Optionally, the first conductor 110 includes a conductive retriever, such as a copper strip. Optionally, the second conductor 120 comprises a wire harness. Optionally, the second conductor 120 includes a conductive retrieval member, such as a copper strip.

The fourth sealing member 90 can be encapsulated between the circuit board 80 and the sidewall 50, that is, the liquid compound is mechanically or manually injected between the sidewall 50 and the circuit board 80, and cured under normal temperature or heating condition to form a thermosetting fourth sealing member with excellent performance. The fluidity of the liquid compound allows the liquid compound to sufficiently diffuse between the side wall 50 and the circuit board 80 and to cover the connection position of the first conductor 110 and the overall positive electrode 100a and the connection position of the second conductor 120 and the overall negative electrode 100 b. The fourth seal 90 is located at an end of the third seal 70 facing away from the third area 53 of the sidewall 50 in the first direction X and is connected to the third seal 70.

In other embodiments, the fourth sealing member 90 may be sealed between the circuit board 80 and the sidewall 50 in other manners.

The fourth sealing member 90 is filled between the two ends of the circuit board 80 in the second direction Y and the side wall 50, so that the connection position of the power output part 121 and the circuit board 80 can be protected, and the risk of electrical connection failure of the power output part 121 and the circuit board 80 caused by other impurities entering the space between the side wall 50 and the circuit board 80 is reduced.

As shown in fig. 32, 33 and 35, in some embodiments, the battery pack 100 further includes a top wall 130, and the top wall 130 covers a side of the circuit board 80 facing away from the cell unit 10 and is connected to the two side walls 50.

As shown in fig. 32 and 33, the top wall 130 covers a side of the circuit board 80 facing away from the cell unit 10 in the first direction X. The top wall 130 is disposed opposite the third region 53 of the side wall 50 and covers the third opening 55 of the side wall 50. The top wall 130 and the side wall 50 may be welded or may be connected by bolts, screws, glue, etc. The top wall 130 covers the side of the circuit board 80 away from the electric core unit 10, so that the circuit board 80 can be protected, and the risk that the circuit board 80 is damaged by external force is reduced.

In some embodiments, the cell 12 is a soft-pack cell.

The casing 122 of soft-packaged electrical core includes the plastic-aluminum membrane, through holding soft-packaged electrical core in support 11, the first supporting part 13 of support 11 supports in adjacent support 11, can form clearance 20 between two adjacent supports 11, then the heat that charge and discharge in-process soft-packaged electrical core produced can pass through support 11 and transmit to the clearance 20 between two adjacent supports 11 in, heat radiating area is big, the heat transfer route is short, the thermal resistance is lower, the heat that soft-packaged electrical core produced can go out through this clearance 20 fast transfer, thereby reduce soft-packaged electrical core's temperature fast, and then improve group battery 100's heat-sinking capability.

The embodiment of the application further provides an electric device, and the electric device comprises an electric body and the battery pack 100 provided in any embodiment. The electric equipment includes but is not limited to an energy storage system, an electric vehicle, an electric tool, an unmanned aerial vehicle and the like. The battery pack 100 is used to supply electric power to the power consuming body. The battery pack 100 provided by any of the above embodiments has good heat dissipation capability and high heat dissipation efficiency, so that the safety performance of the battery pack 100 is higher, and the electricity utilization safety of the electric equipment is improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery pack comprising a plurality of cell units arranged in a stack in a first direction, the cell units comprising:

a bracket provided with a first support part;

the battery cell is accommodated in the bracket;

wherein the first support part is configured to support adjacent brackets along the first direction so that a gap is formed between the adjacent brackets.

2. The battery pack according to claim 1, wherein the bracket is further provided with a second support portion, the second support portion and the first support portion being respectively provided on both sides of the bracket in the first direction, the second support portion being configured to be engaged with the first support portion of an adjacent bracket.

3. The battery pack of claim 2, wherein the bracket comprises a first portion and a second portion, the first portion and the second portion arranged along the first direction, the first portion and the second portion collectively defining a receiving space, the cells received within the receiving space.

4. The battery pack according to claim 3, wherein the first part is provided with a first fixing portion, the second part is provided with a second fixing portion, and the first fixing portion is fixedly engaged with the second fixing portion in the first direction;

along the first direction, the first fixing portion and the first supporting portion are respectively arranged on two sides of the first portion, and the second fixing portion and the second supporting portion are respectively arranged on two sides of the second portion.

5. The battery pack according to claim 3, wherein at least one end of the cell unit in a second direction forms an electric energy output part, a first channel for the electric energy output part to penetrate out is formed between the first part and the second part, and the second direction is perpendicular to the first direction;

the battery pack also includes a first seal configured to close the first channel.

6. The battery pack according to claim 5, wherein the power output portion includes a main body portion and a folded portion provided to the main body portion in a third direction;

the first passage includes a first space and an accommodating chamber provided in the first space in the third direction, the accommodating chamber communicates with the first space, the main body portion is accommodated in the first space, and the bent portion is accommodated in the accommodating chamber;

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

7. The battery pack according to claim 6, wherein the first portion includes a first flat portion and a first bent portion, and the second portion includes a second flat portion and a second bent portion, the second bent portion being connected to the second flat portion along the third direction;

the first straight portion and the second straight portion are oppositely arranged along the first direction and form the first space, and the first bent portion and the second bent portion form the accommodating chamber.

8. The battery pack according to claim 7, wherein the first flat portion is provided with a first stopper groove extending in the third direction, and a portion of the first sealing member is received in the first stopper groove; and/or a second limiting groove extending along the third direction is arranged on the second straight part, and part of the first sealing element is accommodated in the second limiting groove.

9. The battery pack according to claim 6, wherein two sealing structures are provided on two adjacent cell units, and the two sealing structures are respectively provided on two ends of the bracket along the second direction so as to seal two ends of the gap along the second direction.

10. The battery according to claim 9, wherein the sealing structure includes a fifth sealing portion and a sixth sealing portion, the fifth sealing portion and the sixth sealing portion are respectively provided to two adjacent brackets in the first direction, and the fifth sealing portion and the sixth sealing portion are in sealing engagement.

11. The battery pack according to claim 5, wherein both ends of the cell unit in the second direction form the power output portion;

the battery pack further comprises two side walls, the two side walls are respectively located on two sides of the battery cell unit along the second direction, and each support is connected with the two side walls;

an accommodating cavity is formed in one side of the side wall facing the battery cell unit, and each electric energy output part is accommodated in the accommodating cavity;

the battery pack further comprises a third sealing member filled in the accommodating cavity.

12. The battery pack of claim 1, wherein the cell comprises a housing, an electrode assembly, and an electrode terminal connected to the electrode assembly and extending from the housing;

wherein the case includes a body part in which the electrode assembly is accommodated and an extension part extending outward from the body part, and the electrode terminal extends from the extension part.

13. The battery pack of claim 12, wherein the cell unit further comprises an insulator that is fitted around an outer periphery of the body portion.

14. An electric device characterized by comprising the battery pack according to any one of claims 1 to 13.