CN214123999U

CN214123999U - Battery package and consumer

Info

Publication number: CN214123999U
Application number: CN202120275043.6U
Authority: CN
Inventors: 喻律师; 吴明杰; 夏君
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-09-03
Anticipated expiration: 2031-01-29

Abstract

The embodiment of the utility model provides a relate to battery technical field, disclose a battery package and consumer very much, including electric core subassembly, circuit board, conducting strip and mounting panel. The battery cell assembly comprises a plurality of battery cells stacked along a first direction. Every electric core includes electric core casing and utmost point ear, and utmost point ear extends electric core casing along the second direction, and utmost point ear is including locating the outer connecting portion of electric core casing and weld part. The circuit board is arranged on the electric core assembly. The conducting plate is arranged on the surface of the circuit board far away from the electric core component, and the welding part is connected with the conducting plate. The support plate comprises a support body arranged between the circuit board and the cell component and a support arm extending from the support body. The support arm extends beyond the conducting strip to the connecting portion of utmost point ear are connected to the support arm, and the shore A hardness of connecting portion is greater than the shore A hardness of support arm. In this way, the embodiment of the utility model provides a can support the effect that the arm played the support protection to the utmost point ear of electric core, avoid utmost point ear fracture.

Description

Battery package and consumer

Technical Field

The embodiment of the utility model provides a relate to battery technical field, especially relate to a battery package and consumer.

Background

In the existing market, the common battery comprises a single battery cell, the electric quantity of the single battery cell is less, a plurality of battery cells are usually wrapped to form a new battery pack for increasing the electric quantity, and the problem of less electric quantity of the battery can be solved by the new battery pack. The battery cell is provided with a lug which is connected with a metal patch on the circuit board, so that the battery cell is communicated with the circuit board.

However, the inventor of the present invention finds out that: in the battery use, the condition that utmost point ear is buckled to the metal patch can hardly appear, and the corner and the utmost point ear contact of metal patch can produce great stress for utmost point ear fracture.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present invention provide a battery pack and an electric device, which overcome the above problems or at least partially solve the above problems.

According to the utility model discloses an aspect provides a battery package and consumer, include: comprises an electric core component, a circuit board, a conducting strip and a bracket plate. The battery cell assembly comprises a plurality of battery cells stacked along a first direction. Every electric core includes electric core casing and utmost point ear, and utmost point ear extends electric core casing along the second direction, and utmost point ear is including locating the outer connecting portion of electric core casing and weld part. The circuit board is arranged on the electric core assembly. The conducting plate is arranged on the surface of the circuit board far away from the electric core component, and the welding part is connected with the conducting plate. The support plate comprises a support body arranged between the circuit board and the cell component and a support arm extending from the support body. The support arm extends beyond the conducting strip to the connecting portion of utmost point ear are connected to the support arm, and the shore A hardness of connecting portion is greater than the shore A hardness of support arm.

In an alternative form, the support arm is provided with an arcuate portion having a first fillet, the tab weld having a thickness of T1, the first fillet having a radius R1, and R1> T1.

In an alternative way, the support arm satisfies the following condition: l1 is more than or equal to d, and along the second direction, L1 is the vertical distance from one surface of the circuit board facing the electric core assembly to the top of the arc-shaped part, and d is the vertical distance from one surface of the circuit board facing the electric core assembly to the top of the conducting strip.

In an alternative mode, the supporting arm and the lug meet the condition that D is more than T1, wherein in the first direction, D is the vertical distance from the conducting strip to the supporting arm, and T1 is the thickness of the welding part of the lug.

In an alternative mode, the battery cells include a first battery cell and a second battery cell which are adjacently arranged; the support arm includes first support arm and second support arm, first support arm with the second support arm set up in the conducting strip both sides, first support arm is connected the connecting portion of the utmost point ear of first electric core, the second support arm is connected the connecting portion of the utmost point ear of second electric core, the first weld part of first electric core and the second weld part of second electric core weld in same conducting strip.

In an optional mode, the support plate includes a second groove disposed between the first support arm and the second support arm, and the portion of the circuit board on which the conductive sheet is disposed in the second groove.

In an optional mode, the circuit board is provided with a first through hole and a second through hole, the first through hole is used for the first support arm to extend out of the circuit board, and the second through hole is used for the second support arm to extend out of the circuit board.

In an optional mode, the thickness T1 of the welding part of the tab of the first battery cell is 0.1-0.2 mm; the thickness T2 of the welding part of the lug of the second battery cell is 0.1-0.2 mm; the thickness d of the conductive sheet is 0.5-1.0 mm.

In an optional mode, the battery pack includes a fixing member, the circuit board is provided with a first fixing hole, the support plate is provided with a second fixing hole, and the fixing member passes through the first fixing hole and is fixed to the second fixing hole.

According to another aspect of the present invention, there is provided an electric device, comprising the battery pack as described above.

The embodiment of the utility model provides a beneficial effect is: different from the prior art, the electrical core assembly of the embodiment of the present invention comprises a plurality of electrical cores stacked along a first direction, each electrical core comprises an electrical core housing and a tab, the tab extends out of the electrical core housing along a second direction, the tab comprises a connecting portion and a welding portion disposed outside the electrical core housing, wherein the circuit board is disposed on the electrical core assembly, the conductive sheet is disposed on the surface of the circuit board away from the electrical core, the welding portion is connected to the conductive sheet, furthermore, the support plate comprises a support body disposed between the circuit board and the electrical core assembly, and a support arm extending from the support body, wherein the support arm extends beyond the conductive sheet, and the support arm is connected to the connecting portion of the tab, the shore a hardness of the connecting portion is greater than the shore a hardness of the support arm, so as to set, when the tab is bent towards the electrical core assembly, the support arm connects the connecting portion of the tab, and the shore a hardness of the connecting portion is greater than the shore a hardness of the support arm, the utmost point ear is not fragile, and the support arm can play the effect of support protection to utmost point ear, avoids the corner of conducting strip and utmost point ear contact to cause the fracture of utmost point ear.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic diagram of the overall assembly of a battery pack according to an embodiment of the present invention;

fig. 2 is an exploded view of a part of the structure of a battery pack according to an embodiment of the present invention;

FIG. 3 is a cross-sectional side view taken at B-B of FIG. 1;

fig. 4 is a schematic partially cut-away view of a battery pack housing structure of a battery pack according to an embodiment of the present invention;

fig. 5 is an exploded view of the overall structure of a battery pack according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating the assembly of a single cell of a battery pack according to an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of the structure of FIG. 5;

fig. 8 is a partially cut-away schematic view of a part of the structure of a battery pack according to an embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of the structure of FIG. 8;

fig. 10 is a schematic structural view of a support plate of a battery pack according to an embodiment of the present invention;

fig. 11 is a schematic view of another angle of the structure of the support plate of the battery pack according to the embodiment of the present invention;

fig. 12 is an exploded view of a part of the structure of a battery pack according to an embodiment of the present invention;

fig. 13 is a partially cut-away schematic view of a partial structure of a battery pack according to an embodiment of the present invention;

fig. 14 is a schematic diagram of a battery pack according to an embodiment of the present invention, which is partially cut open and filled with glue;

FIG. 15 is an enlarged view of a portion of the structure of FIG. 13;

fig. 16 is a schematic view of the battery pack according to the embodiment of the present invention, partially cut away from another angle;

FIG. 17 is an enlarged view of a portion of the structure of FIG. 16;

FIG. 18 is an enlarged view of a portion of the structure of FIG. 17;

fig. 19 is a partially sectioned side view of a partial structure of a battery pack according to an embodiment of the present invention;

FIG. 20 is an enlarged view of a portion of the structure of FIG. 19;

fig. 21 is an exploded view of another embodiment of the battery pack of the present invention;

FIG. 22 is an enlarged view of a portion of the structure of FIG. 21;

fig. 23 is a partially cut-away schematic view of the overall structure of an embodiment of the battery pack of the present invention;

FIG. 24 is an enlarged view of a portion of the structure of FIG. 23;

fig. 25 is a partially cut-away schematic view of a partial structure of another embodiment of the battery pack of the present invention;

FIG. 26 is an enlarged view of a portion of the structure of FIG. 25;

fig. 27 is a partially cut-away glue-pouring schematic view of the overall structure of another embodiment of the battery pack of the present invention;

fig. 28 is an enlarged view of a portion of the structure of fig. 27.

10, a battery pack shell; 11. a bottom wall; 111. a raised layer; 12. a side wall; 121. a fixed part; 121a, top surface of the fixing part; 1211. fixing grooves; 122. a bayonet; 13. a battery cavity; 14. a second groove;

20. an electrical core assembly; 21. a plurality of cells; 211. a cell shell; 2111. a sealing part; 2111a, a first seal portion; 2111b, a second seal portion; 2112. an accommodating portion; 212. a tab; 212a, a connecting portion; 212b, a weld; 21', a first cell; 212', a first cell casing; 212a', a first portion; 211' and a first tab; 211a' and a connection portion of the first tab; 21", a second cell; 212", a second cell casing; 212a ", a second portion; 211 ″ of a second tab; 211a ″ of the second tab; 2211. a first groove;

30. a mounting plate; 31. a stent body; 311. a boss portion; 3111. a base plate; 3111a, a first surface; 3111b, a second surface; 3112. a first connecting plate; 3113. a second connecting plate; 312. a hook is clamped; 313. a first groove; 314. a bracket hole; 315. a second fixing hole; 32. a support arm; 32a, an arc portion; 321. a first support arm; 322. a second support arm;

40. a first resin layer; 50. a second resin layer; 60. a conductive sheet; 70. a circuit board; 70a, a soldering portion of the circuit board; 71. circuit board holes; 711. a first through hole; 712. a second through hole; 72. a first fixing hole; 80. a fixing member; 90. a first cushion pad; 100. a second cushion pad; 110. a first insulating member; 120. a second insulating member.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, a battery pack 01 includes: the battery pack comprises a battery pack case 10, a battery cell assembly 20, a support plate 30, a first resin layer 40, a second resin layer 50, a conductive sheet 60, a circuit board 70, a fixing member 80, a first buffer 90 and a second buffer 100. Wherein, the electric core assembly 20 is disposed in the battery pack case 10, the support plate 30 is disposed on the electric core assembly 20, and the support plate 30 is fixed with the battery pack case 10. The circuit board 70 is disposed on the support plate 30, the conductive sheet 60 is disposed on the circuit board 70, and the fixing member 80 is used to fix the circuit board 70 to the support plate 30. The first resin layer 40 is disposed between the cell assembly 20 and the holder plate 30 to fix the cell assembly 20 and the holder plate 30. The second resin layer 50 is disposed between one end of the cell assembly 20 far from the support plate 30 and the battery pack case 10, and the second resin layer 50 fixes the cell assembly 20 and the battery pack case 10. First buffer 90 and second buffer 100 set up in the both sides of electric core subassembly 20, and first buffer 90 and second buffer 100 are used for buffering electric core subassembly 20. Preferably, the first resin layer 40 includes a potting adhesive.

The battery pack case 10, as shown in fig. 3-5, the battery pack case 10 includes a bottom wall 11 and a side wall 12 connected to the bottom wall 11, preferably, the bottom wall 11 is perpendicular to the side wall 12. The bottom wall 11 and the side wall 12 together enclose a battery cavity 13 with an opening (not labeled), wherein the battery cavity 13 is used for accommodating the battery assembly 20. The inner surface of the sidewall 12 is provided with a fixing portion 121, and the fixing portion 121 is provided with a fixing groove 1211, and the fixing groove 1211 is used for fixing the electric core assembly 20. The bottom wall 11 of the battery pack case 10 extends along the second direction to form a protruding layer 111, and the protruding layer 111 is used for abutting against the electric core assembly 20 accommodated in the battery cavity 13 to support the electric core assembly 20. Wherein, the protruding layer 111, the side wall 12 of the battery pack case 10 and the bottom wall 11 of the battery pack case 10 enclose and form a second groove 14, and when viewed from the first direction, the second groove 14 is located between the electric core assembly 20 and the bottom wall 11 of the battery pack case 10, the second groove 14 can be used to fill a second resin layer 50, and the second resin layer 50 is used to bond the electric core assembly 20, the side wall 12 and the bottom wall 11, so that the electric core assembly 20, the bottom wall 11 and the side wall 12 are fixed together. Preferably, the second resin layer 50 is disposed between the protruding layer 111 and the cell assembly 20, the second resin layer 50 is further disposed in the second groove 14, and the second groove 14 can accommodate more second resin layers 50, which is beneficial for better fixing the cell assembly 20 and the battery pack case 10, and in some embodiments, the second resin layer 50 can be partially disposed in a gap between adjacent cells 21, and the gap is close to the bottom wall 11. Preferably, the second resin layer 50 includes a potting adhesive.

In some embodiments, the side wall 12 of the battery pack case 10 is provided with a bayonet 122, and the bayonet 122 is used for clamping the support plate 30 to fix the support plate 30 and the battery pack case 10.

In some embodiments, the sidewall 12 of the battery pack case 10 includes a protrusion (not labeled) protruding from the top surface of the fixing portion, and the bayonet 122 is disposed on the protrusion.

The battery cell assembly 20, as shown in fig. 5-7, the battery cell assembly 20 is received in the battery cavity 13. The battery cell assembly 20 includes a plurality of battery cells 21 stacked in a first direction, and specifically, the plurality of battery cells 21 are stacked in a thickness direction of the battery cells. Each of the battery cells 21 includes a cell case 211, a tab 212, and an electrode assembly 213. The cell casing 211 includes a sealing portion 2111 and a receiving portion 2112, the sealing portion 2111 includes a first sealing portion 2111a and a second sealing portion 2111b extending from the first sealing portion 2111a away from one end of the cell casing 211, and the first sealing portion 2111a is connected to the receiving portion 2112. The electrode assembly 213 is accommodated in the accommodating portion 2112, the tab 212 is electrically connected to the electrode assembly, and the tab 212 extends out of the cell case 211 from the sealing portion 2111 in a second direction perpendicular to the first direction. A length L1 of the first sealing portion 2111a in the third direction, which is perpendicular to both the first and second directions, is greater than a length L2 of the second sealing portion 2111b in the third direction. The part of the tab 212 extending out of the cell shell 211 includes a connection portion 212a and a welding portion 212b disposed outside the cell shell 211, the connection portion 212a is connected to the welding portion 212b, and the welding portion 212b of the tab 212 is used for connecting the conductive sheet 60, so that the tab 212 is connected to the conductive sheet 60. The accommodating portion 2112 includes a connecting portion 2112a and two side wall portions (not labeled) disposed opposite in the first direction, the connecting portion 2112a connecting the side wall portions and the first seal portion 2111 a.

The plurality of battery cells 21 are stacked in the first direction, the sealing portions 2111 of two adjacent battery cells 21 and the connection portions 2112a of the accommodating portions 2112 enclose a first groove 2211, the first groove 2211 is arranged in the third direction, and the first resin layer 40 is arranged in the first groove 2211. Preferably, the first groove 2211 is used to guide the injection of the first resin layer 40 and also to reduce the overflow of the first resin layer 40 out of the battery pack case 10.

The sidewall 12 of the battery pack case 10 is provided with a fixing groove 1211 communicating with the battery cavity 13, the fixing groove 1211 is used for accommodating and fixing the battery cell 21, and the position deviation of the battery cell 21 when the first resin layer 40 is injected is reduced, and preferably, the fixing groove 1211 is provided with an insulating layer for insulating and isolating the battery cell 21 from the fixing groove 1211. Preferably, the insulating layer includes an adhesive for fixing the battery cell 21 and the sidewall of the battery pack case 10. In some embodiments, the distance between the inner wall of the fixing groove 1211 and the battery cell 21 accommodated in the fixing groove 1211 is smaller, for example: 0.2 mm to reduce the flow of the injected first resin layer 40 into the fixing groove 1211.

In some embodiments, the number of the fixing slots 1211 on the fixing portion 121 is plural, a side of one cell 21 is disposed in one fixing slot 1211, another side of one cell 21 is disposed in another fixing slot 1211 disposed oppositely, or two sides of two cells 21 are disposed in one fixing slot 1211. In another embodiment, the number of the fixing portions 121 is two, the two fixing portions 121 are respectively located on two opposite side walls 12 of the battery pack case 10, one side of the battery cell 21 is disposed in the fixing groove 1211 on one side, and the other side is disposed in the fixing groove 1211 on the other side, so that the two sides of the battery cell 21 are fixed, and the stability of fixing the battery cell 21 is facilitated.

In some embodiments, as shown in fig. 8 and 9, the fixing portion 121 includes a top surface 121a near the open end of the battery cavity 13, and the vertical distance from the connecting portion 2112a of the accommodating portion 2112 to the top surface 121a in the second direction is H1, and the vertical distance from the connecting portion 2112a of the accommodating portion 2112 to the end of the first sealing portion 2111a away from the accommodating portion 2112 is H2, preferably, H2 < H1. When the first resin layer 40 is injected, the injection is usually stopped when the first resin layer 40 is substantially flush with the first sealing part 2111a, and H2 < H1, so that the fixing part 121 protrudes from the first sealing part 2111a, and the fixing part 121 can limit the first resin layer 40 from overflowing out of the battery pack case 10.

In some embodiments, the first sealing portion 2111a of the battery cell 21 is received in the fixing groove 1211 when viewed in the third direction, preferably, the sealing portion 2111 is entirely received in the fixing groove 1211, and the first resin layer fixes the sealing portion 2111 and the battery pack case 10, so as to limit the movement of the sealing portion 2111, which is beneficial to improving the stability of the battery pack. In the second direction, the vertical distance from the accommodating portion 2112 to the top surface of the side wall 12 of the battery cavity 13 is H3, preferably, H3 > H1.

In some embodiments, the length of the first sealing portion 2111a is less than the length of the second sealing portion 2111b in the second direction, so that the battery assembly is not only aesthetically pleasing overall, but also saves material.

The conductive sheet 60, as shown in fig. 5, the conductive sheet 60 is made of a material having conductive properties, such as: copper, aluminum, iron, and the like. In some embodiments, the thickness d of the conductive sheet 60 is 0.5 millimeters.

In the circuit board 70, as shown in fig. 5, the conductive sheet 60 is disposed on the circuit board 70, and the conductive sheet 60 is electrically connected to the circuit board 70.

As shown in fig. 5, 10, 11 and 12, the support plate 30 is disposed on the battery cell assembly 20, and the support plate 30 is fixed to the battery pack case 10. The holder plate 30 includes a holder body 31 and a support arm 32 extending from the holder body 31 in the second direction. Preferably, the holder plate 30 is positioned on the top surface of the fixing portion 121.

The holder body 31 is provided with a plurality of protrusions 311 extended from a surface of the holder body 31 facing the electric core assembly 20 and hooks 312. Preferably, in the second direction, the supporting arms 32 and the protruding portions 311 are disposed on two opposite sides of the bracket body 31, and the circuit board 70 is particularly disposed on a surface of the bracket body away from the core assembly 20. The hook 312 is engaged with the bayonet 122 of the battery pack case 10, so as to fix the support plate 30 to the battery pack case 10.

It can be understood that: the manner in which the holder plate 30 is fixed to the battery pack case 10 is not limited to the above, and other manners are also possible, such as: screwed, welded, etc.

As shown in fig. 13 to 15, the protrusion 311 is disposed between the sealing portions 2111 of the adjacent cells 21, when the first resin layer 40 is disposed between the cell casing 211 and the support plate 30, the protrusion 311 is bonded to the first resin layer 40, and the protrusion 311 is used to bond and fix the cell casing 211 and the support plate 30, so that the amount of the first resin layer 40 can be saved, and the cost can be reduced.

Specifically, the boss 311 includes a bottom plate 3111, a first connection plate 3112, and a second connection plate 3113. Bottom plate 3111's one end is connected to the one end of first connecting plate 3112, and bottom plate 3111's the other end is connected to the one end of second connecting plate 3113, and the other end of first connecting plate 3112 and second connecting plate 3113 all is connected with support body 31. Preferably, the first connection plate 3112, the bottom plate 3111 and the second connection plate 3113 are bonded and fixed to the first resin layer 40, so that the protrusion 311 has multiple surfaces bonded to the first resin layer 40, and the bonding between the cell casing 211 and the protrusion 311 is further strengthened.

As shown in fig. 16-20, the base plate 3111 includes a first face 3111a and a second face 3111b oppositely disposed in a second direction. The first surface 3111a is closer to the accommodating portion 2112 than the other surface of the boss portion 311, and the first surface 3111a is bonded in contact with the first resin layer 40. In the second direction, the first seal portion 2111a extends beyond the first surface 3111a of the boss 311. Here, the "other surface" refers to the other surface of the boss 311 except for the first surface 3111a of the boss 311, and when the boss 311 and the cell casing 211 are adhesively fixed by the first resin layer 40, the first surface 3111a of the boss 311 is bonded to the first resin layer 40 preferentially over the other surface of the boss 311.

In some embodiments, a first included angle ≦ 1 is formed between the first connection plate 3112 and the direction opposite to the first direction, and a second included angle ≦ 2 is formed between the second connection plate 3113 and the first direction, and both the first included angle and the second included angle are greater than 30 degrees and less than 80 degrees, so that the stress intensity of the protrusion 311 is within a safe range. In some embodiments, the first angle and the second angle are equal, so that the stress on the protrusion 311 is relatively uniform and not easily damaged.

In some embodiments, the width of the boss 311 in the first direction satisfies the condition: d2 is more than or equal to n x d1, wherein d1 is the distance between the sealing parts 2111a of two adjacent cells, and d2 is the width of the protrusion 311 along the first direction. Preferably, n is greater than or equal to 0.6 and less than 1, which is beneficial for the convex part 311 to be arranged between the sealing parts 2111 of the adjacent battery cells 21. A gap is formed between the protruding portion 311 and the sealing portion 2111 of the adjacent battery cell 21, preferably, the first resin layer 40 includes a potting adhesive, the potting adhesive is disposed in the gap and cured to form the first resin layer 40, and the battery cell 21 and the support plate 30 are bonded and fixed by the first resin layer 40, so that movement of the battery cell 21 is reduced.

In some embodiments, referring again to fig. 15, a surface of the bracket body 31 facing away from the core assembly 20 is provided with a first recess 313. The first groove 313 receives a soldering portion 70a of the circuit board 70, and the soldering portion 70a is soldered and fixed to the conductive sheet 60.

In some embodiments, as shown in fig. 5 and 10, bracket body 31 is provided with bracket holes 314 and circuit board 70 is provided with circuit board holes 71. The support holes 314 and the circuit board holes 71 allow the welded portions of the tabs 212 to pass through and then electrically connect with the conductive sheets 60.

In some embodiments, the circuit board 70 is provided with a first fixing hole 72, the bracket plate 30 is provided with a second fixing hole 315, and the fixing member 80 is fixed to the second fixing hole 315 after passing through the first fixing hole 72, thereby fixing the circuit board 70 and the bracket plate 30. Preferably, the fixing member 80 may be a screw, and the first fixing hole 72 and the second fixing hole 315 are both screw holes, and the screw passes through the first fixing hole 72 and is screwed into the second fixing hole 315, so as to fix the circuit board 70 and the bracket board 30.

It is understood that the fixing manner between the circuit board 70 and the bracket board 30 is not limited to the above, but may be other manners, such as: riveting, glue fixation, snap fixation, etc.

As shown in fig. 16-18, in some embodiments, in the second direction, the supporting arm 32 extends beyond the conductive sheet 60, and the supporting arm 32 is connected to the connecting portion 212a of the tab 212, when the tab 212 is bent, the supporting arm 32 can support and protect the tab 212, so as to reduce the stress concentration of the tab 212 caused by the conductive sheet 60 directly contacting the tab 212 when the tab 212 is bent, thereby causing the tab 212 to break.

In some embodiments, the shore a hardness of the connecting portion 212a is greater than the shore a hardness of the supporting arm 32, the shore a hardness of the supporting arm 32 is smaller, when the tab 212 contacts with the supporting arm 32 to generate a larger stress, the tab 212 is not easily broken, and the supporting arm 32 can protect the tab 212.

It should be noted that: the Shore hardness is also called Shore hardness, and represents a method for representing the hardness grades of metal, plastic and rubber materials, and is divided into four types, namely A type, B type, C type and D type, and the Shore A hardness is taken as one of the types.

In some embodiments, the end of the support arm 32 beyond the conductive sheet 60 is provided with an arc 32a, the arc 32a is provided with a first rounded corner (not labeled), the tab 212 welding portion 212b has a thickness T1, and the first rounded corner has a radius R1. Preferably, R1> T1. When the tab 212 is bent, the arc-shaped part 32a is beneficial to guiding the tab 212 to bend in an arc shape, so that stress concentration is reduced, and damage to the tab 212 is reduced.

In some embodiments, support arm 32 satisfies the condition: l1 ≧ d, and along the second direction, L1 is the vertical distance from a surface of the circuit board 70 facing the electric core assembly 20 to the top of the arc-shaped part 32a, and d is the vertical distance from a surface of the circuit board 70 facing the electric core assembly 20 to the top of the conductive sheet 60. The arc-shaped part 32a of the supporting arm 32 extends out of the circuit board 70 and exceeds the conductive sheet 60 on the circuit board 70, and when the tab 212 is bent, the supporting arm 32 exceeding the conductive sheet 60 can support and protect the tab 212, so that the fracture of the tab 212 caused by the contact of the tab 212 and the corner of the conductive sheet 60 is reduced.

In some embodiments, the support arm 32 satisfies the condition D > T1, where D is the vertical distance from the conductive strip 60 to the support arm 32 in the first direction and T1 is the thickness of the weld 212b of the tab 212. The supporting arm 32 and the conducting strip 60 have a spacing distance therebetween, so that the corner contact between the tab 212 and the conducting strip 60 when the tab is bent is reduced, and meanwhile, the spacing distance between the supporting arm 32 and the conducting strip 60 can facilitate the subsequent processing of the tab 212, thereby facilitating the process production.

With respect to the above-described first resin layer 40, as shown in fig. 14 to 16, the first resin layer 40 is provided between the cell casing 211 and the protruding portion 311, and the first resin layer 40 is used to adhesively fix the protruding portion 311 and at least a part of the accommodating portion 2112 so as to fix the cell casing 211 and the accommodating portion 2112. When the battery pack falls or other working conditions cause heavy impact, the first resin layer 40 can also play a role in buffering, and the probability of damage of the battery pack is reduced. Specifically, fall towards ground or take place other operating mode and arouse the moment of great impact at battery package 01, the gravity of electric core 21 is strikeed to mounting panel 30 direction, because first resin layer 40 sets up between electric core 21 and mounting panel 30, first resin layer 40 can eliminate partly with the gravity of electric core 21 or other great impact buffering, the rest part impact force transmits support panel 30 through first resin layer 40, the partial impact force of transmitting support panel 30 makes support panel 30 have the trend of keeping away from electric core 21 motion, and support panel 30 and electric core 21 are fixed through first resin layer 40 bonding, at this moment, there is elastic restoring force between first resin layer 40 and the support panel 30, elastic restoring force can eliminate some impact forces. In addition, the holder plate 30 is fixed to the battery pack case 10, and a part of the impact force transmitted to the holder plate 30 can be transmitted to the battery pack case 10. It can be seen that the first resin layer 40 can reduce the possibility of damage to the battery pack 01 at the moment when the battery pack 01 falls down toward the ground or other working conditions cause a significant impact.

In some embodiments, the first resin layer 40 is disposed between the sealing portions 2111 of the adjacent battery cells 21, and the first resin layer 40 adhesively fixes the protrusion 311 and at least a part of the sealing portions 2111 and the accommodating portions 2112 of the adjacent battery cells 21, so as to adhesively fix the protrusion 311 of the support plate 30 and the cell housing 211 of the cell assembly 20.

For the second resin layer 50, as shown in fig. 16, the second resin layer 50 is disposed between one end of the electric core assembly 20, which is far away from the support plate 30, and the bottom wall 11 of the battery pack case 10, and the second resin layer 50 is used for bonding the electric core 21 and the battery pack case 10, so as to fix the electric core assembly 20 and the battery pack case 10, so that when the battery pack 01 drops or otherwise generates a significant impact, it is beneficial to reduce the relative displacement of the electric core assembly 20 with respect to the battery pack case 10. In addition, the second resin layer 50 is flexible and has elastic deformation performance, and when the battery pack 01 falls or other working conditions occur to cause heavy impact, the second resin layer 50 can also play a role in buffering.

In some embodiments, as shown in fig. 4, a second resin layer 50 is disposed in the second groove 14, and the second resin layer 50 is used to adhesively fix the electric core assembly 20 and the bottom wall 11 of the battery pack case 10.

As for the above-described first and

second cushions

90 and 100, as shown in fig. 2, the first and

second cushions

90 and 100 are disposed at both sides of the battery module 20, and the first and

second cushions

90 and 100 are each located between the battery module 20 and the battery pack case 10. When the battery pack falls, the first buffer pad 90 and the second buffer pad 100 play a role in buffering and protecting the electric core assembly 20 inside the battery pack, so that the direct collision between the electric core assembly 20 and the battery pack shell 10 is reduced, and the damage is avoided.

In some embodiments, as shown in fig. 5 and 13-15, the battery pack 01 further includes a first insulating member 110 and a second insulating member 120, and the second insulating member 120 is connected to the first insulating member 110.

The first insulator 110 and the second insulator 120 are both disposed between the first sealing portions 2111a of the adjacent battery cells 21, and the first insulator 110 exceeds the accommodating portions 2112 of the adjacent battery cells 21 in the second direction, and the first insulator 110 is used to limit the resin before curing from passing through and reduce the flow of the first resin layer 40 into between the accommodating portions 2112 of the adjacent battery cells 21, and meanwhile, when the first resin layer 40 is disposed between the first sealing portions 2111a of the adjacent battery cells 21, the first insulator 110 occupies a part of the volume, which can save the usage amount of the first resin layer 40. In addition, the second insulating member 120 may be compressed to provide a space for the cell 21 to swell, and when the first resin layer 40 is disposed between the first sealing portions 2111a of the adjacent cells 21, the second insulating member 120 may reduce the flow of the first resin layer 40 into between the accommodating portions 2112 of the adjacent cells 21, thereby reducing restriction on swelling of the cells 21.

It should be noted that: usually, two adjacent electric cores 21 in the electric core assembly 20 are a group, and for the convenience of the reader to understand the concept of the present invention, the following description takes two adjacent electric cores 21 as an example:

for convenience of description, as shown in fig. 21 to fig. 24, two adjacent battery cells 21 are respectively referred to as a first battery cell 21 'and a second battery cell 21", an electrode assembly, a cell casing, and tabs of the first battery cell 21' are respectively referred to as a first electrode assembly (not shown), a first tab 211', and a first cell casing 212' (not shown), and an electrode assembly, a cell casing, and tabs of the second battery cell 21" are respectively referred to as a second electrode assembly (not shown), a second tab 211", and a second cell casing 212" (not shown). In other words, the plurality of battery cells 21 includes a first battery cell 21 'and a second battery cell 21", the first battery cell 21' including a first electrode assembly, a first cell casing 212 'for housing the first electrode assembly, and a first tab 211' electrically connected to the first electrode assembly. The second cell 21 "includes a second electrode assembly, a second cell casing 212" for housing the second electrode assembly, and a second tab 211 "electrically connected to the second electrode assembly. Further, circuit board hole 71 includes a first through hole 711 and a second through hole 712. The support arm 32 includes a first support arm 321 and a second support arm 322. The bracket apertures 314 include a first bracket aperture (not labeled) and a second bracket aperture (not labeled).

The welding part of the first cell 21' is welded to the conductive plate 60 after penetrating through the first bracket hole and the first through hole 711, and the welding part of the second tab 211 "of the second cell 21" is welded to the conductive plate 60 after penetrating through the second bracket hole and the second through hole 712. The first support arm 321 and the second support arm 322 are disposed at two sides of the conductive plate 60, the arc portion of the first support arm 321 extends out of the conductive plate 60 after passing through the first through hole 711 of the circuit board 70, and the arc portion of the first support arm 321 is connected to the connection portion 211a 'of the first tab 211' of the first cell 21', so that the first support arm 321 is connected to the connection portion 211a' of the first tab 211 'of the first cell 21'. The arc-shaped portion of the second support arm 322 extends out of the conductive plate 60 after passing through the second through hole 712 of the circuit board 70, and the arc-shaped portion of the second support arm 322 is connected to the connection portion 211a "of the second tab 211" of the second cell 21", so that the second support arm 322 is connected to the connection portion 211a" of the second tab 211 "of the second cell 21".

In some embodiments, the thickness T1 of the weld of the first tab 211 'of the first cell 21' is 0.15 millimeters and the thickness T2 of the weld of the second tab 211 "of the second cell 21" is 0.2 millimeters.

In some embodiments, as shown in fig. 25-28, the connection portion of the receptacle of the first cell 21 'includes a first portion 212a' in contact connection with the first seal 2111a of the first cell 21', and a first tab 211' extends from the first seal of the first cell 21 'out of the first cell housing 212'. The first portion 212a 'may be used to fill the first resin layer 40, so as to adhesively fix the first battery cell 21' and the support plate 30. The connection portion of the receptacle 2112 of the second cell 21 "includes a second portion 212a" in contact connection with the first seal of the second cell 21", and the second pole ear 211" extends from the first seal 2111a of the second cell 21 "out of the second cell casing 212". Wherein the second portion 212a "can be used to fill the first resin layer 40 to achieve the adhesive fixation of the second cell 21" and the support plate 30.

In some embodiments, the first resin layer 40 is disposed between the protrusion 311 and the first portion 212a 'and between the protrusion 311 and the second portion 212a ″, the first resin layer 40 is used to adhesively fix the protrusion 311 and at least the first portion 212a', and the first resin layer 40 is used to adhesively fix the protrusion 311 and at least the second portion 212a ″.

In some embodiments, a second groove (not labeled) is disposed between the first supporting arm 321 and the second supporting arm 322, and the portion of the circuit board 70 on which the conductive sheet 60 is disposed is snapped into the second groove. The second groove can facilitate the part of the circuit board 70 provided with the conducting strip 60 to be clamped in, and can ensure that the first supporting arm 321 and the second supporting arm 322 are always in a state of exceeding the conducting strip 60. It will be appreciated that the second recess is not limited to placing the portion of the circuit board 70 where the conductive sheet 60 is disposed, but may also place other substances, such as: and the insulating filler can support and protect the circuit board 70.

In an embodiment of the present invention, the cell assembly comprises a plurality of cells stacked in a first direction, each cell comprises a cell housing and a tab extending in a second direction from the cell housing, the tab comprises a connecting portion and a welding portion disposed outside the cell housing, wherein the circuit board is disposed on the cell assembly, the conducting portion is disposed on a surface of the circuit board away from the cell, the welding portion is connected to the conducting portion, and further, the support plate comprises a support body disposed between the circuit board and the cell assembly, and a support arm extending from the support body, wherein the support arm extends beyond the conducting portion, and the support arm connects the connecting portion of the tab, the shore a hardness of the connecting portion is greater than the shore a hardness of the support arm, such that when the tab is bent toward the conducting portion, the support arm connects the connecting portion of the tab, and the shore a hardness of the connecting portion is greater than the shore a hardness of the support arm, the utmost point ear is not fragile, and the support arm can play the effect of support protection to utmost point ear, avoids the corner of conducting strip and utmost point ear contact to cause the fracture of utmost point ear.

The utility model also provides an embodiment of consumer, consumer include above battery package, consumer includes but not limited to two rounds of electric motor cars, energy storage equipment, handheld electric tool etc. and above-mentioned embodiment can be referred to the function and the structure of battery package, and here is no longer repeated one by one.

The above is only the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. A battery pack, comprising:

the battery core assembly comprises a plurality of battery cores stacked along a first direction, each battery core comprises a battery core shell and a lug, the lug extends out of the battery core shell along a second direction, and the lug comprises a connecting part and a welding part which are arranged outside the battery core shell;

the circuit board is arranged on the electric core assembly;

the conducting plate is arranged on the surface of the circuit board, which is far away from the electric core assembly, and the welding part is connected with the conducting plate;

characterized in that, the battery package still includes:

the support plate comprises a support body and a support arm, wherein the support body is arranged between the circuit board and the electric core assembly, the support arm extends to exceed the conducting strip, the support arm is connected with the connecting part of the lug, and the Shore A hardness of the connecting part is greater than the Shore A hardness of the support arm.

2. The battery pack according to claim 1,

the support arm is provided with arc portion, arc portion has first fillet, the thickness of utmost point ear welding part is T1, the radius of first fillet is R1, and R1> T1.

3. The battery pack of claim 1, wherein in the second direction, a vertical distance from a surface of the circuit board away from the electric core assembly to the top of the supporting arm is L1, a vertical distance from a surface of the circuit board away from the electric core assembly to the top of the conductive sheet is d, and L1 ≧ d.

4. The battery pack of claim 1, wherein the conductive tab is at a vertical distance D from the support arm in the first direction, and the tab welding portion has a thickness T1, D > T1.

5. The battery pack according to claim 1,

the battery cell comprises a first battery cell and a second battery cell which are adjacently arranged;

the support arm includes first support arm and second support arm, first support arm with the second support arm set up in the conducting strip both sides, first support arm is connected the connecting portion of the utmost point ear of first electric core, the second support arm is connected the connecting portion of the utmost point ear of second electric core, the first weld part of first electric core and the second weld part of second electric core weld in same conducting strip.

6. The battery pack according to claim 5,

the support plate comprises a second groove arranged between the first support arm and the second support arm, and the part of the circuit board, which is provided with the conducting strip, is arranged in the second groove.

7. The battery pack according to claim 5,

the circuit board is provided with a first through hole and a second through hole, the first through hole is used for the first supporting arm to extend out of the circuit board, and the second through hole is used for the second supporting arm to extend out of the circuit board.

8. The battery pack according to claim 5,

the thickness T1 of the welding part of the lug of the first battery cell is 0.1-0.2 mm;

the thickness T2 of the welding part of the lug of the second battery cell is 0.1-0.2 mm;

the thickness d of the conductive sheet is 0.5-1.0 mm.

9. The battery pack according to claim 1,

the fixing piece penetrates through the first fixing hole and is fixed in the second fixing hole.

10. An electric device comprising a battery pack according to any one of claims 1 to 9.