Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment. The battery pack comprises a shell, a battery cell assembly, a heat dissipation piece, a first insulating piece, a first fastening piece and a shielding piece. The shell is provided with a containing space and a first fixing hole communicated with the containing space. The battery cell assembly is arranged in the containing space and comprises a battery cell, and the battery cell comprises an electrode terminal. The heat dissipation piece is arranged in the containing space and provided with a first through hole. The first insulator covers at least a portion of the electrode terminal. The first fastener is arranged in the first fixing hole and the first through hole. The shielding piece is connected with the heat dissipation piece and covers an opening of one side, away from the first fixing hole, of the first through hole. In the fastening process of the first fastening piece, chippings generated by the heat dissipation piece and / or the first fastening piece and / or the shell can be reduced to enter the accommodating space, and the risk that the chippings damage the battery cell shell is reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery pack and an electrical device. Background Art

[0002] Currently, battery packs are widely used in drones, electric vehicles, smart energy storage equipment and other fields. During the assembly process of the battery pack, impurities such as debris can easily enter the battery pack and affect the use of the battery pack. Utility Model Content

[0003] In view of this, it is necessary to provide a battery pack and an electrical device that can reduce the entry of impurities into the battery pack.

[0004] An embodiment of the present application provides a battery pack, including a shell, a battery cell assembly, a heat sink, a first insulating member, a first fastener and a shielding member. The shell is provided with a receiving space and a first fixing hole connected to the receiving space. The battery cell assembly is arranged in the receiving space, the battery cell assembly includes a battery cell, and the battery cell includes an electrode terminal. The heat sink is arranged in the receiving space, and the heat sink is provided with a first through hole. The first insulating member covers at least part of the electrode terminal. The first fastener is arranged in the first fixing hole and the first through hole. The shielding member is connected to the heat sink and covers the opening of the first through hole away from the first fixing hole. During the tightening process of the first fastener, the debris generated by the heat sink and / or the first fastener and / or the shell can be reduced from entering the receiving space, thereby reducing the risk of debris damaging the battery cell shell.

[0005] In one or more of the above optional embodiments, a connecting member is also included, the battery cell assembly and the connecting member are arranged along a first direction, the connecting member has a first recess, part of the electrode terminal is disposed in the first recess, at least part of the first insulating member is disposed in the gap between the electrode terminal and the connecting member, and the first through hole is located outside the first recess to facilitate external equipment to pass through the first through hole into the first recess.

[0006] In one or more of the above optional embodiments, the heat sink includes a top wall and a protrusion, a first through hole passes through the protrusion, the protrusion extends from the top wall along a first direction, the shielding member is connected to the protrusion, and the protrusion is located outside the first recess, thereby reducing the occupation of the first recess by the protrusion, reducing the length of the external device extending into the first recess, and further reducing the risk of external equipment damaging components in the first recess.

[0007] In one or more optional embodiments above, the first recess includes a first opening toward the heat sink, and along the first direction, there is a first space between the top wall and the first opening, and the first space is configured such that before the first insulating member is provided, the first through hole is connected to the first recess through the first space. When the first insulating material is injected, an external device extends from the first through hole, and the first space can provide space for the external device, facilitating the external device to extend therein, thereby reducing the risk of the external device damaging the components in the first recess.

[0008] In one or more optional embodiments above, the convex portion is provided with a first wall, the first through hole penetrates the first wall, and the shielding member is connected to the first wall. The shielding member is configured to be pushed open when subjected to force, and to cover the first through hole when not subjected to force, which is conducive to reducing debris from entering the receiving space.

[0009] In one or more of the above optional embodiments, the shielding member includes a first section and a second section that are bent, the first section is connected to the top wall or other walls of the protrusion, the second section is connected to the first wall, and the second section is configured to be pushed open when subjected to force, and to cover the first through hole when not subjected to force, thereby helping to reduce the entry of debris into the receiving space.

[0010] In one or more of the above optional embodiments, the shielding member includes a bending section, which is separated from the protrusion, and connects the first section and the second section, which is conducive to bending the second section relative to the first section, facilitating external equipment to push open the second section, and facilitating the second section to bend relative to the first section.

[0011] In one or more of the above optional embodiments, an adhesive is also included. The adhesive is arranged in the first through hole and connected to the second section, which is beneficial to shielding the opening. The adhesive can adhere to some debris, which is beneficial to reducing the risk of short circuit.

[0012] In one or more of the above optional embodiments, the adhesive is connected to the inner wall of the first through hole, which is further beneficial to shield the opening and further reduce the risk of short circuit.

[0013] In one or more of the above optional embodiments, at least one of the housing, the first fastener and the heat sink comprises a metal material. During the tightening process of the first fastener, the metal chips generated can be reduced from entering the receiving space, the risk of metal damaging the battery housing, and the risk of metal chips short-circuiting the battery.

[0014] In one or more of the above optional embodiments, the shielding member is provided with a plurality of intersecting cutouts to form a plurality of shielding sub-components, and the plurality of shielding sub-components are configured to be pushed open when subjected to force, and to cover the opening of the first through hole when not subjected to force.

[0015] In one or more of the above optional embodiments, the battery pack includes an adhesive member, which connects the intersections of multiple cutout portions and can adhere multiple shielding components, which is beneficial for shielding the openings. The adhesive member can adhere to some metal chips, which is beneficial for reducing the risk of short circuit.

[0016] In one or more of the above optional embodiments, the first through hole is separated from the first insulating member, so as to facilitate the first fastener to connect to the first through hole.

[0017] An embodiment of the present application further provides an electrical device, comprising the battery pack in any of the above embodiments.

[0018] The battery pack and the electrical device are connected to the heat sink through the shielding member, and cover the opening of the first through hole on the side away from the first fixing hole. During the tightening process of the first fastener, the debris generated by the heat sink and / or the first fastener and / or the shell can be reduced from entering the receiving space, thereby reducing the risk of the debris damaging the battery cell shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An exploded schematic diagram of a battery pack in some embodiments is shown.

[0020] Figure 2 Schematic diagrams of the structures of some shells, heat sinks and shielding elements in some embodiments are shown.

[0021] Figure 3 Shows Figure 2 An enlarged schematic diagram of point A in the embodiment.

[0022] Figure 4 Shows Figure 2 A schematic diagram of the structures of the shielding member and the adhesive member in the embodiment.

[0023] Figure 5 Shows Figure 2 Schematic diagram of the structure of external equipment glue filling in the embodiment.

[0024] Figure 6 Schematic diagrams of the structures of some shells, heat sinks and shielding elements in other embodiments are shown.

[0025] Figure 7 Shows Figure 6 An enlarged schematic diagram of point B in the embodiment.

[0026] Figure 8 Shows Figure 6 A schematic diagram of the structures of the shielding member and the adhesive member in the embodiment.

[0027] Fig. 9 Shows Figure 6 Schematic diagram of the structure of external equipment glue filling in the embodiment.

[0028] Fig.10 Schematic diagrams of the structures of some shells, heat sinks and shielding elements in some other embodiments are shown.

[0029] Fig.11 Shows Fig.10 Schematic diagram of the structure of external equipment glue filling in the embodiment.

[0030] Fig.12 A partial structural schematic diagram of a battery pack in some embodiments is shown.

[0031] Fig.13Shows Fig.12 A schematic diagram of an exploded view of a portion of the structure of a battery pack in an embodiment.

[0032] Fig.14 A partial structural schematic diagram of a battery pack in some embodiments is shown.

[0033] Fig.15 Shows Fig.14 A schematic diagram of the structure of the battery pack in an inverted position in the embodiment.

[0034] Fig.16 Shows Fig.15 A schematic cross-sectional view of a partial structure of an inverted battery pack in an embodiment along the VI-VI direction.

[0035] Fig.17 Shows Fig.15 A schematic cross-sectional view of a partial structure of an inverted battery pack along the VI-VI direction in the embodiment, wherein the first insulating material is disposed in the first recess.

[0036] Fig.18 Shows Fig.17 An enlarged schematic diagram of point E in the embodiment.

[0037] Fig.19 Schematic diagrams of the structures of connecting members in some embodiments are shown.

[0038] Fig. 20 Schematic diagrams of the structures of heat sinks in some embodiments are shown.

[0039] Fig.21 Shows Fig. 20 A schematic cross-sectional view of the heat sink along direction VII-VII in the embodiment.

[0040] Fig. 22 A schematic diagram of the structure of electrical equipment in some embodiments is shown.

[0041] Description of main component symbols:

[0042] Battery Pack 100

[0043] Housing 10

[0044] Containment Space 101

[0045] Housing opening 102

[0046] First fastener 103

[0047] Second fastener 104

[0048] The third fastener 105

[0049] First housing opening 10a

[0050] Second housing opening 10b

[0051] First fixing hole 10c

[0052] Second fixing hole 10d

[0053] The third fixing hole 10e

[0054] The first side wall 11

[0055] The first opening 111

[0056] The first fixing hole 112

[0057] Second side wall 12

[0058] The third opening 121

[0059] The third side wall 13

[0060] First heat sink 131

[0061] Fourth side wall 14

[0062] Second heat sink 141

[0063] Shell bottom wall 15

[0064] Top cover 16

[0065] The third heat sink 161

[0066] Bracket 17

[0067] Battery cell assembly 20

[0068] The first group of cells 201

[0069] The second battery cell 202

[0070] Battery 21

[0071] Battery shell 211

[0072] Electrode terminal 212

[0073] Heat sink 30

[0074] Heat dissipation channel 30a

[0075] Protrusion 30b

[0076] First through hole 301

[0077] Opening 301a

[0078] Front wall 31

[0079] First connection hole 311

[0080] Rear wall 32

[0081] The second connection hole 321

[0082] Top wall 33

[0083] Projection 34

[0084] First Wall 341

[0085] Second Wall 342

[0086] Bottom wall 35

[0087] Left wall 36

[0088] Right wall 37

[0089] The first insulating member 40

[0090] Shielding member 50

[0091] Cutout 51

[0092] Shielding component 50a

[0093] Adhesives 50b, 50c

[0094] First section 52

[0095] Second section 53

[0096] Bend section 54

[0097] Connector 60

[0098] first recess 601

[0099] First opening 601a

[0100] First Space 601b

[0101] Base 61

[0102] The second through hole 612

[0103] The third through hole 613

[0104] Fourth through hole 614

[0105] Connecting wall 62

[0106] First circuit board 70

[0107] The first conductive sheet 71

[0108] The second conductive sheet 72

[0109] Second circuit board 80

[0110] Second insulating member 90

[0111] The third insulating member 91

[0112] Fourth insulating member 92

[0113] Heat conducting element 110

[0114] Thermal conductive adhesive 110a

[0115] Insulator 110b

[0116] The first elastic member 110c

[0117] The second elastic member 110d

[0118] First electrical connector 120

[0119] The second electrical connection member 130

[0120] Conductive member 140

[0121] Electrical equipment 200

[0122] External device 1000

[0123] First direction X

[0124] Second direction Y

[0125] The third direction Z

[0126] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0127] The following specific embodiments are exemplary and non-limiting, and are intended to provide a basic understanding of the present application, and are not intended to identify the key or decisive elements of the present application or to limit the scope of protection. As long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

[0128] When a component is considered to be “provided on” another component, it can be directly provided on the other component or there may be a component in between. When a component is considered to be “connected to” another component, it can be directly connected to the other component or there may be a component in between.

[0129] It can be understood that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, there may be a state that is approximately perpendicular or equal to each other between the two components. For example, in combination with numerical descriptions, perpendicularity can refer to the angle between two straight lines being between 90°±10°, perpendicularity can also refer to the dihedral angle between two planes being between 90°±10°, and perpendicularity can also refer to the angle between a straight line and a plane being between 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0130] The terms “vertical”, “horizontal”, “left”, “right”, “top”, “bottom”, “front”, “back” and similar expressions used in this document are for illustrative purposes only and are not intended to limit this application.

[0131] Unless otherwise defined, when the term "plurality" is used to describe the number of components, it specifically means that the components are two or more.

[0132] In the first direction X, it includes the first direction X and a direction opposite to the first direction X, in the second direction Y, it includes the second direction Y and a direction opposite to the second direction Y, and in the third direction Z, it includes the third direction Z and a direction opposite to the third direction Z.

[0133] An embodiment of the present application provides a battery pack, including a shell, a battery cell assembly, a heat sink, a first insulating member, a first fastener and a shielding member. The shell is provided with a receiving space and a first fixing hole connected to the receiving space. The battery cell assembly is arranged in the receiving space, the battery cell assembly includes a battery cell, and the battery cell includes an electrode terminal. The heat sink is arranged in the receiving space, and the heat sink is provided with a first through hole. The first insulating member covers at least part of the electrode terminal. The first fastener is arranged in the first fixing hole and the first through hole. The shielding member is connected to the heat sink and covers the opening of the first through hole away from the first fixing hole. During the tightening process of the first fastener, the debris generated by the heat sink and / or the first fastener and / or the shell can be reduced from entering the receiving space, thereby reducing the risk of debris damaging the battery cell shell.

[0134] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0135] See also Figures 1 to 11 An embodiment of the present application provides a battery pack 100 , including a housing 10 and a battery cell assembly 20 . The housing 10 is provided with a receiving space 101 , and the battery cell assembly 20 is arranged in the receiving space 101 .

[0136] In some embodiments, the housing 10 includes a first side wall 11, a second side wall 12, a third side wall 13, a fourth side wall 14, and a housing bottom wall 15. The housing bottom wall 15 and the battery cell assembly 20 are arranged along a first direction X, the third side wall 13 and the fourth side wall 14 are arranged along a second direction Y, and the first side wall 11 and the second side wall 12 are arranged along a third direction Z. The first side wall 11 connects the third side wall 13 and the fourth side wall 14, the second side wall 12 connects the third side wall 13 and the fourth side wall 14, and the housing bottom wall 15 connects the first side wall 11, the second side wall 12, the third side wall 13 and the fourth side wall 14, and forms a receiving space 101. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0137] In some embodiments, the housing 10 includes a top cover 16 , which connects the first side wall 11 , the second side wall 12 , the third side wall 13 , and the fourth side wall 14 and encloses the receiving space 101 .

[0138] In some embodiments, the battery pack 100 includes a bracket 17 , which connects the first side wall 11 , the second side wall 12 , the third side wall 13 , and the fourth side wall 14 . The bracket 17 and the top cover 16 are arranged along the first direction X, and the top cover 16 is connected to the bracket 17 .

[0139] In some embodiments, at least one of the first side wall 11, the second side wall 12, the third side wall 13, the fourth side wall 14, the bottom wall 15 of the housing, and the top cover 16 includes a thermally conductive material, which can improve the heat dissipation performance. Optionally, the first side wall 11, the second side wall 12, the third side wall 13, the fourth side wall 14, the bottom wall 15 of the housing, and the top cover 16 all include a metal thermally conductive material and a thermally conductive insulating material, and the insulating material can cover the outer surface of the metal thermally conductive material. Optionally, the metal thermally conductive material includes aluminum.

[0140] In some embodiments, at least one of the first side wall 11 , the second side wall 12 , the third side wall 13 , the fourth side wall 14 , the housing bottom wall 15 and the top cover 16 is provided with a heat sink to further improve the heat dissipation performance.

[0141] Optionally, along the second direction Y, a first heat sink 131 is disposed on the side of the third side wall 13 away from the fourth side wall 14 , and a second heat sink 141 is disposed on the side of the fourth side wall 14 away from the third side wall 13 . Optionally, the top cover 16 is provided with a third heat sink 161 .

[0142] See also Fig.13 and Fig.14 The battery cell assembly 20 includes a battery cell 21 , and the battery cell 21 includes a battery cell shell 211 , an electrode assembly (not shown) and an electrode terminal 212 . The electrode assembly is disposed in the battery cell shell 211 , and the electrode terminal 212 is connected to the battery cell shell 211 and led out from the battery cell shell 211 .

[0143] In some embodiments, the battery cell 21 includes a soft pack battery cell.

[0144] In some embodiments, the battery pack 100 includes a heat sink 30 . The heat sink 30 is disposed in the receiving space 101 and can dissipate heat from the battery cell 21 .

[0145] In some embodiments, the battery cell assembly 20 includes a first group of battery cells 201 and a second group of battery cells 202, the first group of battery cells 201 includes at least two battery cells 21 stacked along a third direction Z, and the second group of battery cells 202 includes at least two battery cells 21 stacked along a third direction Z. The first group of battery cells 201 and the second group of battery cells 202 are arranged along a second direction Y, and the heat sink 30 is disposed between the first group of battery cells 201 and the second group of battery cells 202, and can dissipate heat for the first group of battery cells 201 and the second group of battery cells 202.

[0146] In some embodiments, the heat sink 30 includes a heat dissipation channel 30 a , which is connected to the outside and is beneficial for dissipating heat from the battery cell assembly 20 .

[0147] See also Figures 1 to 11 In some embodiments, the housing 10 includes a housing opening 102, and the housing opening 102 includes a first housing opening 10a and a second housing opening 10b. The first housing opening 10a penetrates the first side wall 11, and the second housing opening 10b penetrates the second side wall 12. The heat dissipation channel 30a communicates with the first housing opening 10a and the second housing opening 10b, and the heat dissipation channel 30a communicates with the outside through the first housing opening 10a and the second housing opening 10b.

[0148] In some embodiments, a cooling medium passes through the heat dissipation channel 30a to remove heat. Optionally, the cooling medium includes air and liquid. Optionally, liquid from the external environment, such as rain, can be used to dissipate heat by natural wind or external air cooling equipment.

[0149] See also Fig.12 , Fig.13 , Fig. 20 and Fig.21 In some embodiments, the heat sink 30 includes a front wall 31 and a rear wall 32 arranged along a third direction Z. Along the third direction Z, a heat dissipation channel 30 a penetrates the front wall 31 and the rear wall 32 .

[0150] In some embodiments, the heat dissipation element 30 is provided with a first through hole 301 .

[0151] In some embodiments, the heat sink 30 includes a top wall 33 and a protrusion 34. The protrusion 34 extends from the top wall 33 along the first direction X. The first through hole 301 passes through the protrusion 34 along the third direction Z.

[0152] In some embodiments, the top wall 33 connects the front wall 31 and the rear wall 32 .

[0153] In some embodiments, the heat dissipation element 30 includes a bottom wall 35 , and the bottom wall 35 and the top wall 33 are arranged along the first direction X.

[0154] In some embodiments, the heat sink 30 includes a left wall 36 and a right wall 37, wherein the left wall 36 connects the top wall 33 and the bottom wall 35, and the right wall 37 connects the top wall 33 and the bottom wall 35. The left wall 36 connects the first group of battery cells 201, and the heat of the first group of battery cells 201 is transferred to the heat sink 30 through the left wall 36. The right wall 37 connects the second group of battery cells 202, and the heat of the second group of battery cells 202 is transferred to the heat sink 30 through the right wall 37.

[0155] In some embodiments, the battery pack 100 includes a heat conductive member 110 , the battery cells 21 are disposed between adjacent heat conductive members 110 , the heat conductive member 110 connects the left wall 36 and the right wall 37 , and the heat conductive member 110 connects the bottom wall 35 , which is beneficial to heat dissipation.

[0156] In some embodiments, the battery pack 100 includes a thermally conductive adhesive 110 a , and the thermally conductive member 110 is connected to the battery cell housing 211 via the thermally conductive adhesive 110 a , which is beneficial to heat dissipation.

[0157] In some embodiments, the battery pack 100 includes an insulator 110 b , and the insulator 100 c is disposed between the thermal conductor 110 and the cell housing 211 .

[0158] In some embodiments, the battery pack 100 includes a first elastic member 110c. The first elastic member 110c is disposed between the first side wall 11 and the battery cell housing 211, which can provide expansion space for the battery cell 21, and can reduce the amount of heat dissipated by the heat conductive member 110 connected to the battery cell 21 through the first side wall 11, which can reduce the temperature difference between the multiple battery cells 21, and is conducive to improving the performance of the battery pack 100.

[0159] In some embodiments, the battery pack 100 includes a second elastic member 110d, and the second elastic member 110d is disposed between adjacent heat conducting members 110 to provide expansion space for the battery cell 21. Optionally, the second elastic member 110d includes foam.

[0160] In some embodiments, the battery pack 100 includes a first insulating member 40 that covers at least a portion of each electrode terminal 212 .

[0161] In some embodiments, the first insulating member 40 is configured to be formed by the first insulating material flowing into the receiving space 101 and then solidifying.

[0162] In some embodiments, the first insulating material includes one of polyurethane glue, epoxy glue, and silicone glue. Optionally, the first insulating material includes potting glue. Optionally, the first insulating material includes foam glue.

[0163] In some embodiments, the flowing first insulating material flows into the receiving space 101 through the first through hole 301 and solidifies to form the first insulating member 40 .

[0164] In some embodiments, the battery pack 100 includes a first fastener 103, the housing 10 is provided with a first fixing hole 10c, and the first fastener 103 is provided in the first fixing hole 10c and the first through hole 301, and the heat sink 30 can be fixedly connected to the housing 10. Optionally, the first fastener 103 includes a non-metallic fastener, which can reduce the generation of debris during the locking process. Optionally, the first fastener 103 includes a metal fastener, which can increase the locking force and improve the connection strength between the heat sink 30 and the housing 10. Optionally, the metal fastener includes a screw.

[0165] In some embodiments, the first through hole 301 is separated from the first insulating member 40 , so that the first fastener 103 can be connected to the first through hole 301 .

[0166] In some embodiments, the first fixing hole 10 c passes through the first side wall 11 or the second side wall 12 .

[0167] In some embodiments, the heat sink 30 includes two protrusions 34, and the two protrusions 34 are spaced apart on the top wall 33 along the third direction Z. The first insulating material can be simultaneously injected through the first through holes 301 provided on the two protrusions 34, which is beneficial to improving the glue injection efficiency and facilitating the fixed connection between the heat sink 30 and the housing 10. When the heat sink 30 includes two protrusions 34, the first fixing hole 10c passes through the first side wall 11 and the second side wall 12, one of the first fasteners 103 fixes the heat sink 30 to the first side wall 11, and the other first fastener 103 fixes the heat sink 30 to the second side wall 12.

[0168] In some embodiments, the heat sink 30 includes a protrusion 30 b, which is disposed in the heat dissipation channel 30 a and extends along the third direction Z. Optionally, along the third direction Z, one end surface of the protrusion 30 b is coplanar with the front wall 31 , and the other end surface is coplanar with the rear wall 32 .

[0169] In some embodiments, a first connection hole 311 is provided at one end of the protrusion 30b that is coplanar with the front wall 31, and a second fixing hole 10d is provided on the first side wall 11. The battery pack 100 includes a second fastener 104, and the second fastener 104 is provided in the second fixing hole 10d and the first connection hole 311, which is conducive to fixing the heat sink 30 to the first side wall 11.

[0170] In some embodiments, a second connection hole 321 is provided at one end of the protrusion 30b that is coplanar with the rear wall 32, and a third fixing hole 10e is provided on the second side wall 12. The battery pack 100 includes a third fastener 105, and the third fastener 105 is provided in the third fixing hole 10e and the second connection hole 321, which is conducive to fixing the heat sink 30 to the second side wall 12.

[0171] See also Figures 1 to 11 In some embodiments, the battery pack 100 includes a shielding member 50, which is connected to the heat sink 30 and covers the opening 301a of the first through hole 301 away from the first fixing hole 10c. During the locking process of the first fastener 103, the debris generated by the heat sink 30 and / or the first fastener 103 and / or the shell 10 can be reduced from entering the receiving space 101, thereby reducing the risk of the debris damaging the battery cell shell 211.

[0172] In some embodiments, the shielding member 50 is connected to the protrusion 34. Optionally, the shielding member 50 is connected to the protrusion 34 by bonding.

[0173] In some embodiments, at least one of the shell 10, the first fastener 103 and the heat sink 30 includes metal material. During the locking process of the first fastener 103, the metal chips generated can be reduced from entering the receiving space 101, the risk of metal damaging the battery cell shell 211 can be reduced, and the risk of short circuit between the metal chips and the battery cell 21 can be reduced.

[0174] See also Figures 2 to 5 In some embodiments, the protrusion 34 is provided with a first wall 341 , the first through hole 301 passes through the first wall 341 , and the shielding member 50 is connected to the first wall 341 and shields the opening 301 a .

[0175] In some embodiments, the shielding member 50 is configured such that the shielding member 50 is pushed open when a force is applied, and covers the opening 301a of the first through hole 301 when no force is applied. Specifically, when the first insulating material is injected, the external device 1000 pushes the shielding member 50 open and extends into the receiving space 101. When the injection is completed, the external device 1000 withdraws from the receiving space 101, and the shielding member 50 is restored and covers the opening 301a. Optionally, the external device 1000 includes a glue injection tube.

[0176] In some embodiments, the shielding member 50 is provided with a plurality of intersecting cutouts 51 to form a plurality of shielding sub-elements 50a. The plurality of shielding sub-elements 50a are configured to be pushed open when subjected to force, and to cover the opening 301a of the first through hole 301 when not subjected to force.

[0177] In some embodiments, the battery pack 100 includes an adhesive member 50b, which connects the intersections of the multiple cutouts 51 and can bond multiple shielding sub-members 50a, which is beneficial for shielding the opening 301a. The adhesive member 50b can adhere to some metal filings, which is beneficial for reducing the risk of short circuit. Optionally, the adhesive member 50b includes glue. It is understandable that the adhesive member 50b bonds multiple shielding sub-members 50a after the first insulating material is injected.

[0178] In some embodiments, the adhesive member 50 b is connected to the inner wall of the first through hole 301 , which is further helpful to shield the opening 301 a and further reduce the risk of short circuit.

[0179] In some embodiments, the shielding member 50 includes a first section 52 and a second section 53 that are bent, the first section 52 is connected to the top wall 33 or other walls of the protrusion 34, the second section 53 is connected to the first wall 341, and the second section 53 covers the opening 301a.

[0180] See also Figure 7 In some embodiments, the first section 52 connects to other walls of the protrusion 34 .

[0181] See also Fig.11 In some embodiments, the first section 52 is connected to the top wall 33 .

[0182] In some embodiments, the second section 53 is configured to be pushed open when subjected to force, and to cover the first through hole 301 when not subjected to force. When the first insulating material is injected, the external device 1000 pushes the second section 53 open, so that the second section 53 is bent relative to the first section 52. When the injection is completed, the external device 1000 withdraws from the receiving space 101, and the second section 53 is bent in the opposite direction relative to the first section 52, so that the second section 53 is connected to the first wall 341 and covers the opening 301a.

[0183] In some embodiments, the shielding member 50 includes a bending section 54, which connects the first section 52 and the second section 53. The bending section 54 is separated from the protrusion 34, which is conducive to bending the second section 53 relative to the first section 52, making it easier for the external device 1000 to push open the second section 53, and facilitating the bending of the second section 53 relative to the first section 52.

[0184] In some embodiments, the battery pack 100 includes an adhesive 50c, which is disposed in the first through hole 301 and connected to the second section 53, which is conducive to shielding the opening 301a. The adhesive 50c can adhere to some metal chips, which is conducive to reducing the risk of short circuit. After the adhesive 50c is injected with the first insulating material, the first fastener 103 is then disposed in the first fixing hole 10c and the first through hole 301. During the locking process, the adhesive 50c can adhere to the debris generated during the locking process, reducing the debris from entering the receiving space 101.

[0185] In some embodiments, the adhesive member 50c is connected to the inner wall of the first through hole 301, which is further helpful to shield the opening 301a and further reduce the risk of short circuit.

[0186] See also Figures 13 to 19 In some embodiments, the battery pack 100 includes a connector 60, and the cell housing 211 and the connector 60 are arranged along a first direction X. The connector 60 has a first recess 601, and a portion of each electrode terminal 212 is disposed in the first recess 601. At least a portion of the first insulating member 40 is disposed in the gap between the electrode terminal 212 and the connector 60.

[0187] In some embodiments, the first through hole 301 is located outside the first recess 601 , so that the external device 1000 can pass through the first through hole 301 and enter the first recess 601 .

[0188] In some embodiments, the first recess 601 includes a first opening 601a facing the heat sink 30, and a first space 601b exists between the top wall 33 and the first opening 601a along the first direction X. The first space 601b is configured such that, before the first insulating member 40 is provided, the first through hole 301 is connected to the first recess 601 through the first space 601b. When the first insulating material is injected, the external device 1000 extends from the first through hole 301, and the first space 601b can provide space for the external device 1000, facilitating the external device 1000 to extend therein, thereby reducing the risk of the external device 1000 damaging the components in the first recess 601. The first insulating material can enter the first recess 601 through the first space 601b.

[0189] In some embodiments, the protrusion 34 is located outside the first recess 601 , which reduces the occupation of the first recess 601 by the protrusion 34 and reduces the length of the external device 1000 extending into the first recess 601 , further reducing the risk of the external device 1000 damaging the components in the first recess 601 .

[0190] In some embodiments, the battery pack 100 includes a first circuit board 70 , the protrusion 34 and the first circuit board 70 are arranged along the first direction X, and the protrusion 34 and the first circuit board 70 are spaced apart to reduce the impact of the external device 1000 extending through the first through hole 301 on the first circuit board 70 .

[0191] In some embodiments, the electrode terminal 212 passes through the first circuit board 70 and connects to a side of the first circuit board 70 facing away from the cell housing 211 , and the first insulating member 40 covers at least a portion of the first circuit board 70 to insulate and protect the first circuit board 70 .

[0192] In some embodiments, the first circuit board 70 includes a plurality of first conductive sheets 71, the first conductive sheets 71 are connected to the first circuit board 70, the electrode terminals 212 of adjacent cells 21 pass through the first circuit board 70, and the two electrode terminals 212 are stacked and welded on the first conductive sheets 71. Welding includes but is not limited to laser welding, ultrasonic welding, etc. In other embodiments, the two electrode terminals 212 are stacked and connected to the first conductive sheet 71 by other means such as conductive glue.

[0193] In one embodiment, the first conductive sheet 71 is configured to collect electrical signal information of the battery cell 21 , and the electrical signal information includes but is not limited to voltage, current, temperature, and resistance.

[0194] In one embodiment, the first circuit board 70 is further provided with a second conductive sheet 72. The second conductive sheet 72 connects the electrode terminals 212 of the first group of battery cells 201 and the electrode terminals 212 of the second group of battery cells 202, and is used to transfer current from the first group of battery cells 201 to the second group of battery cells 202, thereby realizing a series connection or a parallel connection between the first group of battery cells 201 and the second group of battery cells 202.

[0195] Optionally, the first circuit board 70 includes a flexible printed circuit (FPC). Optionally, the first circuit board 70 includes a printed circuit board (PCB).

[0196] In some embodiments, the battery pack 100 further includes a first electrical connector 120, which is connected to an external device to implement input or output of electrical energy. Optionally, the first electrical connector 120 is welded to the first circuit board 70. Optionally, the first electrical connector 120 includes a copper busbar.

[0197] In some embodiments, the battery pack 100 further includes a second electrical connector 130, which is connected to an external device to implement input or output of electrical energy. Optionally, the second electrical connector 130 is welded to the first circuit board 70. Optionally, the second electrical connector 130 includes a copper busbar.

[0198] In some embodiments, the battery pack 100 further includes a conductive member 140, the conductive member 140 is connected to the first circuit board 70, and the conductive member 140 is configured to transmit electrical signal information of the battery cell 21 and / or transmit the power of the battery cell assembly 20, and the electrical signal information includes but is not limited to voltage, current, temperature, and resistance. In this embodiment, the conductive member 140 is configured to transmit the electrical signal information of the battery cell 21 as an example.

[0199] In some embodiments, the battery pack 100 includes a second circuit board 80, and the second circuit board 80 is connected to the top cover 16. The conductive member 140 is connected to the second circuit board 80, and can transmit the collected information to the second circuit board 80.

[0200] Optionally, the second circuit board 80 includes a BMS component (Battery Management System), which includes multiple electronic components. The multiple electronic components can realize functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 21.

[0201] Optionally, the second circuit board 80 includes a flexible printed circuit (FPC). Optionally, the second circuit board 80 includes a printed circuit board (PCB), and a plurality of wires (not shown) are disposed on the second circuit board 80.

[0202] In some embodiments, the outer surface of the connector 60 is insulating. Optionally, the connector 60 is made of an insulating material. Optionally, the connector 60 is made of a metal material and an insulating material, and the insulating material can cover the outer surface of the metal material.

[0203] In some embodiments, the connector 60 includes a base 61 , which is disposed on a side of the first circuit board 70 facing away from the cell housing 211 .

[0204] In some embodiments, the connector 60 includes a connecting wall 62, which is formed by extending the edge of the base 61, and the connecting wall 62 and the base 61 form a first recess 601, which is arranged toward the battery cell assembly 20 in a direction opposite to the first direction X. Optionally, the connector 60 includes four connecting walls 62, which are enclosed by the four connecting walls 62 and the base 61 to form the first recess 601.

[0205] See also Fig.12 and Fig.19 In some embodiments, the connecting member 60 includes a second through hole 612 , and the second through hole 612 penetrates the base 61 along the first direction X. The conductive member 140 is led out from the second through hole 612 .

[0206] In some embodiments, the battery pack 100 includes a second insulating member 90 . The second insulating member 90 is configured to be formed by a second insulating material flowing into the second through hole 612 and then solidified, and the second through hole 612 is closed by the second insulating member 90 .

[0207] In some embodiments, the second insulating material includes but is not limited to polyurethane glue, epoxy glue, and silicone glue. Optionally, the second insulating material includes quick-drying glue.

[0208] In some embodiments, the connector 60 includes a third through hole 613 , and the first electrical connector 120 is led out from the third through hole 613 .

[0209] In some embodiments, the battery pack 100 includes a third insulating member 91 . The third insulating member 91 is configured to be formed by a third insulating material flowing into the third through hole 613 and then solidified, and the third through hole 613 is closed by the third insulating member 91 .

[0210] In some embodiments, the third insulating material includes but is not limited to polyurethane glue, epoxy glue, and silicone glue. Optionally, the third insulating material includes quick-drying glue.

[0211] In some embodiments, the connector 60 includes a fourth through hole 614 , and the second electrical connector 130 is led out from the fourth through hole 614 .

[0212] In some embodiments, the battery pack 100 includes a fourth insulating member 92 . The fourth insulating member 92 is configured to be formed by a fourth insulating material flowing into the fourth through hole 614 and then solidified, and the fourth through hole 614 is closed by the fourth insulating member 92 .

[0213] In some embodiments, the fourth insulating material includes but is not limited to polyurethane glue, epoxy glue, and silicone glue. Optionally, the fourth insulating material includes quick-drying glue.

[0214] See also Fig.16 and Fig.17 When the battery pack 100 is inverted and glued, the heat sink 30 is first installed between the first group of battery cells 201 and the second group of battery cells 202, the first opening 601a of the connector 60 is directed toward the battery cell assembly 20, the electrode terminal 212 of the battery cell assembly 20 is partially disposed in the first recess 601, the conductive member 140 is extended from the second through hole 612, the second insulating material is cured to form the second insulating member 90 and close the second through hole 612, the first electrical connector 120 is extended from the third through hole 613, the third insulating material is cured to form the third insulating member 91 and close the third through hole 613, the second electrical connector 130 is extended from the fourth through hole 614, the fourth insulating material is cured to form the fourth insulating member 92 and close the fourth through hole 614, the battery pack 100 is inverted, the external device 1000 is extended from the first through hole 301 into the first recess 601, and the first insulating material is injected into the first recess 601, and the first insulating material is cured to form the first insulating member 40.

[0215] See also Fig. 22 The present application also provides an electric device 200 using the above battery pack 100. In one embodiment, the electric device 200 of the present application may be, but is not limited to, electronic equipment, drones, backup power supplies, electric vehicles, electric motorcycles, electric power-assisted bicycles, electric tools, large household battery modules, etc.

[0216] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as limitations on the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A battery pack, characterized in that: include: A housing having a receiving space and a first fixing hole communicating with the receiving space; A battery cell assembly is disposed in the receiving space, wherein the battery cell assembly includes a battery cell, and the battery cell includes an electrode terminal; A heat sink is disposed in the receiving space, and the heat sink is provided with a first through hole; a first insulating member, the first insulating member covering at least a portion of each of the electrode terminals; A first fastener, disposed in the first fixing hole and the first through hole; A shielding member is connected to the heat sink and covers an opening of the first through hole on a side away from the first fixing hole.

2. The battery pack according to claim 1, wherein: It also includes a connecting member, the battery cell assembly and the connecting member are arranged along a first direction, the connecting member has a first recess, a portion of each electrode terminal is disposed in the first recess, at least a portion of the first insulating member is disposed in a gap between the electrode terminal and the connecting member, and the first through hole is located outside the first recess.

3. The battery pack according to claim 2, characterized in that: The heat sink comprises a top wall and a convex portion, the first through hole penetrates the convex portion, and the convex portion extends from the top wall along the first direction; The shielding member is connected to the convex portion, and the convex portion is located outside the first concave portion.

4. The battery pack according to claim 3, characterized in that: The first recess includes a first opening toward the heat sink, and along a first direction, a first space exists between the top wall and the first opening, and the first space is configured such that before the first insulating member is provided, the first through hole is connected to the first recess through the first space.

5. The battery pack according to claim 3, characterized in that: The convex portion is provided with a first wall, the first through hole penetrates the first wall, and the shielding member is connected to the first wall; The shielding member is configured to be pushed open when subjected to force, and to cover the first through hole when not subjected to force.

6. The battery pack according to claim 5, characterized in that: The shielding member includes a first section and a second section that are bent, the first section is connected to the top wall or other walls of the protrusion, the second section is connected to the first wall, and the second section is configured to be pushed open when subjected to force, and to cover the first through hole when not subjected to force.

7. The battery pack according to claim 6, characterized in that: The shielding member includes a bending section, the bending section is separated from the convex portion, and the bending section connects the first section and the second section.

8. The battery pack according to claim 6, wherein: It also includes an adhesive component, which is arranged in the first through hole and connected to the second section.

9. The battery pack according to any one of claims 1 to 8, characterized in that: At least one of the housing, the first fastener, and the heat sink includes a metal material.

10. An electrical device, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 9.

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