WO2022067695A1

WO2022067695A1 - Battery having sealing structure

Info

Publication number: WO2022067695A1
Application number: PCT/CN2020/119465
Authority: WO
Inventors: 兰天保; 胡传鹏; 李长江
Original assignee: 东莞新能安科技有限公司
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-07

Abstract

Provided is a battery having a sealing structure. The battery comprises a housing, a battery cell assembly disposed inside the housing, a connector, and a circuit board. The battery cell assembly is electrically connected to the connector. The circuit board is disposed inside the housing, and is connected to the connector. A first recess is arranged at a first side of a first housing. One end of the connector away from the circuit board extends out of the first housing from the first recess. A second recess is arranged at a second housing. A joint where the connector and the circuit board are connected is arranged outside the second housing, and is partially received in the second recess. A sealant is filled in the second recess. The sealant covers the joint where the connector and the circuit board are connected. In the above battery, a portion of the connector is disposed outside the housing, the joint where the connector and the circuit board are connected is arranged outside the second housing and partially received in the second recess, and the sealant is filled in the second recess to perform sealing, such that the connector occupies less internal space of the battery, and the sealing reliability is high.

Description

battery with sealed structure

technical field

The present application relates to the field of batteries, in particular to a battery with a sealed structure.

Background technique

In the prior art, the connector output of the battery is mainly fixed on the surface of the casing by the socket head, and the adapter terminal and the socket head are connected by a wire harness. The adapter and the wire harness are both arranged inside the battery casing, requiring a large space. The structure is complicated. For small batteries, this connection cannot be achieved, and there is also a problem of poor sealing between the socket head and the housing.

SUMMARY OF THE INVENTION

In view of the above situation, the present application provides a battery with a sealed structure, by arranging the connector part outside the casing, and disposing the connection between the connector and the circuit board outside the second casing and partially accommodated in the second groove , the second groove is filled with sealant for packaging, so that the space occupied by the connector inside the battery is reduced, and the sealing reliability is high.

Embodiments of the present application provide a battery with a sealed structure, including a casing, a battery core assembly disposed in the casing, a connector, and a circuit board. The cell assembly is electrically connected to the connector, and the circuit board is disposed in the housing and connected to the connector. A first groove is provided on the first side of the first casing, and one end of the connector away from the circuit board extends out of the first casing from the first groove. The second casing is provided with a second groove, and the connection between the connector and the circuit board is disposed outside the second casing and partially accommodated in the second groove. The second groove is filled with sealant, and the sealant covers the connection between the connector and the circuit board.

In some embodiments, the second groove is disposed close to the first side of the first housing, and the first groove and the second groove communicate with each other.

In some embodiments, the battery further includes a sealing ring, the sealing ring is sleeved on the outer side of the connector, the sealing ring is clamped in the first groove, and the sealing ring and the second The sealant in the groove is bonded.

In some embodiments, the first groove is provided with a first protruding rib connected to the sealing ring, the outer side of the sealing ring is provided with a second protruding rib connected to the housing, and the first protruding rib is connected to the casing. The second raised ribs are staggered.

In some embodiments, the inner side of the sealing ring is provided with a third protruding rib, and the outer surface of the connector is connected to the third protruding rib.

In some embodiments, a positioning column is provided in the first housing, a positioning hole is provided on the circuit board, and the positioning column is matched with the positioning hole.

In some embodiments, the side wall of the second groove is pressed against a side surface of the circuit board facing the second housing.

In some embodiments, the battery further includes an adapter plate, the adapter plate electrically connects the cell assembly and the circuit board, the first housing includes a first receiving cavity and a second receiving cavity, The battery core assembly is arranged in the first accommodating cavity, the circuit board is arranged in the second accommodating cavity, a first partition is arranged between the first accommodating cavity and the second accommodating cavity, and the A limit slot is provided on the first partition plate, and the limit slot is used to fix the adapter plate.

In some embodiments, the first accommodating cavity is filled with potting glue, and the battery further includes a sealing member, and the sealing member is disposed in the limiting groove.

In some embodiments, the first casing and the second casing are fastened together, and the open end of the second casing is accommodated in the open end of the first casing; the first casing There is a connecting groove inside the open end of the connecting groove, the step surface at the bottom of the connecting groove abuts the open end of the second shell, and the sealing glue is filled in the connecting groove.

In some embodiments, the second groove communicates with the connecting groove.

In some embodiments, the inner sidewall of the connection slot is provided with a first snap, the outer sidewall of the second housing is provided with a second snap, and the first snap fits with the second snap .

In some embodiments, a third groove is formed on the step surface, a fourth raised rib is formed at the open end of the second casing, and the fourth raised rib is received in the third groove .

In some embodiments, the casing is further provided with a waterproof and breathable membrane, and the waterproof and breathable membrane is used to adjust the internal pressure of the casing.

In some embodiments, the first housing is further provided with an accommodating groove, and the accommodating groove is located between the first groove and the second accommodating cavity.

The above-mentioned battery is packaged by arranging the connector part outside the casing, setting the connection between the connector and the circuit board outside the second casing, and partially accommodating the battery in the second groove, and filling the second groove with sealant for encapsulation, so that the battery is sealed. The space occupied by the connector inside the battery is reduced, and the sealing reliability is high.

Description of drawings

FIG. 1 is a schematic three-dimensional structure diagram of a battery in an embodiment.

FIG. 2 is a partial structural diagram of the battery shown in FIG. 1 when no sealant is filled between the first casing and the second casing.

FIG. 3 is a schematic diagram of an exploded structure of the battery shown in FIG. 1 .

FIG. 4 is a schematic three-dimensional structural diagram of the first casing of the battery shown in FIG. 1 .

FIG. 5 is a partial structural schematic diagram of the first housing shown in FIG. 4 .

FIG. 6 is a schematic structural diagram of the sealing ring in the battery shown in FIG. 2 .

FIG. 7 is a schematic three-dimensional structural diagram of the second casing of the battery shown in FIG. 1 .

FIG. 8 is a schematic structural diagram of some components of the battery shown in FIG. 1 .

FIG. 9 is a schematic structural diagram of the battery shown in FIG. 1 when the second casing and the sealant are not provided.

FIG. 10 is a schematic cross-sectional structure diagram of the structure shown in FIG. 9 .

FIG. 11 is an enlarged view of a partial structure of the structure shown in FIG. 9 .

FIG. 12 is a top view of the structure shown in FIG. 8 .

FIG. 13 is an enlarged view of a partial structure of the first separator.

FIG. 14 is a schematic diagram of the structure of the seal.

FIG. 15 is a schematic structural diagram of a top view of a battery case.

FIG. 16 is a schematic cross-sectional view of the housing shown in FIG. 15 .

FIG. 17 is a partial enlarged view of the structure shown in FIG. 16 .

FIG. 18 is a schematic three-dimensional structural diagram of the battery shown in FIG. 1 in another direction.

Figure 19 is a top view of a battery in one embodiment.

Description of main component symbols:

battery 100

Shell 10

first shell 11

first groove 111

The first raised rib 112

Positioning post 113

First Containment Chamber 114

Second Containment Chamber 115

First partition 116

Limit slot 1161

Seals 117

Containment Slot 1171

Depression 1172

Connection slot 118

Step surface 1181

Third groove 1182

The first buckle 119

second shell 12

Second groove 121

Second buckle 122

Fourth raised rib 123

Waterproof breathable membrane 13

Detection port 131

Receptacle 14

Cell components 20

Connector 30

Sealant 40

seal ring 50

The second raised rib 51

The third raised rib 52

circuit board 60

Positioning hole 61

Adapter board 70

Detailed ways:

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments.

It should be noted that when an element is referred to as being "fixed 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 also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.

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

An embodiment of the present application provides a battery with a sealed structure, including a casing, a battery core assembly disposed in the casing, a connector, and a circuit board. The cell assembly is electrically connected to the connector, and the circuit board is disposed in the housing and connected to the connector. A first groove is provided on the first side of the first casing, and one end of the connector away from the circuit board extends out of the first casing from the first groove. The second casing is provided with a second groove, and the connection between the connector and the circuit board is disposed outside the second casing and partially accommodated in the second groove. The second groove is filled with sealant, and the sealant covers the connection between the connector and the circuit board.

Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to FIGS. 1 , 2 and 3 , a battery 100 with a sealed structure includes a casing 10 , a battery cell assembly 20 disposed in the casing 10 , a connector 30 and a circuit board 60 . The connector 30 extends out of the housing 10 , and the cell assembly 20 is electrically connected to the connector 30 . The circuit board 60 is disposed in the housing 10 and connected to the connector 30 . The housing 10 includes a first housing 11 and a second housing 12 , a first groove 111 is provided on the first side of the first housing 11 , and one end of the connector 30 away from the circuit board 60 is The first groove 111 protrudes from the first casing 11 . The second casing 12 is provided with a second groove 121, and the second groove 121 is disposed close to the first side of the first casing 11. The first groove 111 and the second groove 121 Connected. The connection between the connector 30 and the circuit board 60 is disposed outside the second housing 12 and partially accommodated in the second groove 121 . The second groove 121 is filled with sealant 40 , and the sealant 40 covers the connection between the connector 30 and the circuit board 60 .

The housing 10 further includes a sealing ring 50 , and the sealing ring 50 is sleeved on the outside of the connector 30 . The sealing ring 50 is clamped in the first groove 111 . The inner side of the sealing ring 50 is bonded to the sealing glue 40 .

In the embodiment of the present application, the first groove 111 is substantially a notch on the side wall of the first casing 11 , and communicates with the inner cavity of the first casing 11 . The second groove 121 is formed by the inward depression of the side wall of the second casing 12 . The outer contour of the sealing ring 50 matches the shape of the first groove 111 , and is substantially rectangular, and the inner contour of the sealing ring 50 matches the outer contour of the connector 30 , and is substantially trapezoidal. It can be understood that the inner and outer contours of the sealing ring 50 may also be in other shapes such as a circle, a polygon, etc., which can be matched with the first groove 111 and the connector 30 respectively, and the present application is not limited thereto.

Please continue to refer to FIG. 4 , FIG. 5 and FIG. 6 , the first groove 111 is provided with a first protruding rib 112 connected to the sealing ring 50 , and the outer side of the sealing ring 50 is provided with a second protrusion connected to the housing 10 Ribs 51 are formed, and the first protruding ribs 112 and the second protruding ribs 51 are staggered. Specifically, the first protruding rib 112 is disposed on the inner peripheral side of the first groove 111 , and the first protruding rib 112 and the first housing 11 are integrally formed. The second protruding rib 51 is disposed on the surface of the sealing ring 50 abutting against the first groove 111 , and the second protruding rib 51 and the sealing ring 50 are integrally formed. The sealing ring 50 is made of elastic material. Along the axial direction of the connector 30 , the thickness of the sealing ring 50 is approximately the same as the thickness of the first groove 111 . The first protruding ribs 112 correspond to the positions of the second protruding ribs 51 . When the sealing ring 50 is accommodated in the first groove 111 , the inner peripheral side of the first groove 111 and the sealing ring The outer side surface of the sealing ring 50 abuts against the first protruding rib 112 and the second protruding rib 51 , thereby improving the sealing performance between the sealing ring 50 and the first groove 111 . In other embodiments, the thickness of the sealing ring 50 and the thickness of the first groove 111 may also be different, and the present application is not limited thereto.

Please refer to FIG. 6 again, the inner side of the sealing ring 50 is provided with a third protruding rib 52 , and the outer surface of the connector 30 is connected to the third protruding rib 52 , so as to ensure the connection between the connector 30 and the sealing ring 50 . sealing performance.

Referring to FIGS. 7 to 10 , the first housing 11 is provided with positioning posts 113 , the circuit board 60 is provided with positioning holes 61 , and the positioning posts 113 are matched with the positioning holes 61 . Specifically, the first housing 11 includes a first accommodating cavity 114 and a second accommodating cavity 115 , and a first partition 116 is provided between the first accommodating cavity 114 and the second accommodating cavity 115 . The cell assembly 20 is disposed in the first receiving cavity 114 , the circuit board 60 and the positioning post 113 are disposed in the second receiving cavity 115 , and the circuit board 60 is electrically connected to the cell assembly 20 . connect. A plurality of the positioning columns 113 are vertically disposed at the bottom of the second receiving cavity 115 and can be integrally formed with the first housing 11 . When the positioning posts 113 are matched with the positioning holes 61 , the circuit board 60 is supported and fixed by a plurality of the positioning posts 113 . The first groove 111 is disposed on a side of the second accommodating cavity 115 opposite to the first partition plate 116 . One end of the connector 30 extending into the first housing 11 is electrically connected to the circuit board 60 .

The side wall of the second groove 121 protrudes from the side wall of the second casing 12 . When the second casing 12 is engaged with the first casing 11 , the side wall of the second groove 121 presses against the side surface of the circuit board 60 facing the second casing 12 , so that the The circuit board 60 is further fixed to prevent the circuit board 60 from shaking in the housing 10 . Further, please refer to FIG. 2 again, before the sealant 40 is filled, the connection between the circuit board 60 and the connector 30 is located in the second groove 121 and exposed to the housing 10 , and the sealant 40 covers the second groove 121 when filled with the sealant 40 At the connection between the circuit board 60 and the connector 30 , on the one hand, the sealing of the casing 10 is completed, and on the other hand, the circuit board 60 and the connector 30 are fixed.

Please continue to refer to FIG. 11 , the battery 100 further includes an adapter board 70 , and the adapter board 70 is electrically connected to the cell assembly 20 and the circuit board 60 . Specifically, the first partition plate 116 is provided with a limiting groove 1161 for fixing the adapter plate 70 . One end of the adapter plate 70 extends into the first accommodating cavity 114 and is electrically connected to the cell assembly 20 , and the other end of the adapter plate 70 extends into the second accommodating cavity 115 and the circuit board 60 electrical connections.

Please refer to FIG. 12 , FIG. 13 and FIG. 14 , the first receiving cavity 114 is filled with potting glue, the first housing 11 further includes a sealing member 117 , and the sealing member 117 is disposed in the limiting groove 1161 is used to fill the gap between the adapter plate 70 and the limiting groove 1161 to prevent the potting glue from flowing into the second accommodating cavity 115 . The sealing member 117 is made of elastic material, and its shape is generally U-shaped. A receiving groove 1171 is formed in the middle of the sealing member 117 , the adapter plate 70 is disposed in the receiving groove 1171 , and the inner side wall of the receiving groove 1171 abuts the surface of the adapter plate 70 . A concave portion 1172 is formed on the outer peripheral side of the sealing member 117 , and the inner peripheral side of the limiting groove 1161 is clamped in the concave portion 1172 .

Please refer to FIG. 1 , FIG. 3 and FIG. 4 again, the first casing 11 is buckled with the second casing 12 , and the open end of the second casing 12 is accommodated in the first casing 11 . Inside the open end. The open end of the first casing 11 is provided with a connecting groove 118, the stepped surface 1181 at the bottom of the connecting groove 118 abuts the open end of the second casing 12, and the connecting groove 118 is filled with The sealant 40 seals the connection gap between the first casing 11 and the second casing 12 . The first housing 11 is further provided with an accommodating groove 14 , and the accommodating groove 14 is located between the first groove 111 and the second accommodating cavity 115 . When the first casing 11 and the second casing 12 are fastened together, the second groove 121 communicates with the connecting groove 118 and the accommodating groove 14, and the molten sealant 40 can pass through the second groove. 121 is poured, and then flows into the connecting groove 118 and the accommodating groove 14 from the second groove 121 until the sealing is completed.

Please refer to FIG. 15 , FIG. 16 and FIG. 17 , the inner side wall of the connection slot 118 is provided with a first buckle 119 , the outer side wall of the second housing 12 is provided with a second buckle 122 , the first buckle The buckle 119 cooperates with the second buckle 122 , and the sealant 40 is provided between the first buckle 119 and the second buckle 122 , which is beneficial to prevent the first shell 11 and the second shell Body 12 is separated. The plurality of first buckles 119 are in one-to-one correspondence with the plurality of second buckles 122 . In one embodiment of the present application, the stepped surface 1181 is further provided with a third groove 1182 , and the open end of the second housing 12 is provided with a fourth protruding rib 123 . The ribs 123 are received in the third grooves 1182 . The sealant 40 can also be filled in the gap between the third groove 1182 and the fourth raised rib 123 to further improve the connection firmness and stability of the first housing 11 and the second housing 12 . tightness.

Referring to FIG. 18 , in one embodiment, the casing 10 is further provided with a waterproof and breathable membrane 13 for adjusting the internal pressure of the casing 10 . The gas generated during the charging and discharging of the battery 100 can escape from the waterproof and breathable membrane 13 .

Referring to FIG. 19 , in an optional embodiment, the waterproof and breathable membrane 13 is further provided with a detection port 131 for detecting the sealing performance of the battery 100 to ensure overall reliability.

The above embodiments are only used to illustrate the technical solutions of the present application rather than limitations. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced. Neither should depart from the spirit and scope of the technical solutions of the present application.

Claims

A battery with a sealed structure, comprising:

a casing, including a first casing and a second casing;

an electric core assembly, arranged in the casing;

a connector, the battery core assembly is electrically connected to the connector;

It is characterized in that, the battery further includes a circuit board, and the circuit board is arranged in the casing and connected to the connector;

A first groove is provided on the first side of the first casing, and one end of the connector away from the circuit board extends out of the first casing from the first groove;

The second casing is provided with a second groove, the connection between the connector and the circuit board is arranged outside the second casing, and is partially accommodated in the second groove. The groove is filled with sealant, and the sealant covers the connection between the connector and the circuit board.
The battery of claim 1, wherein the second groove is disposed close to the first side of the first casing, and the first groove and the second groove communicate with each other.
The battery according to claim 1, wherein the battery further comprises a sealing ring, the sealing ring is sleeved on the outer side of the connector, the sealing ring is clamped in the first groove, the sealing ring The sealing ring is bonded with the sealant in the second groove.
The battery according to claim 3, wherein a first raised rib connected to the sealing ring is arranged in the first groove, and a second raised rib connected to the casing is arranged outside the sealing ring, so The first protruding rib and the second protruding rib are arranged alternately.
3. The battery of claim 3, wherein a third raised rib is provided on the inner side of the sealing ring, and the outer surface of the connector is connected to the third raised rib.
The battery according to claim 1, wherein a positioning post is provided in the first casing, a positioning hole is provided on the circuit board, and the positioning post is matched with the positioning hole.
6. The battery of claim 6, wherein the side wall of the second groove presses against a side surface of the circuit board facing the second casing.
The battery according to claim 6, wherein the battery further comprises an adapter plate, the adapter plate electrically connects the cell assembly and the circuit board, and the first housing includes a first housing cavity and a second accommodating cavity, the battery core assembly is arranged in the first accommodating cavity, the circuit board is arranged in the second accommodating cavity, and is arranged between the first accommodating cavity and the second accommodating cavity The first partition plate is provided with a limit groove, and the limit groove is used to fix the adapter plate.
The battery according to claim 8, wherein the first receiving cavity is filled with potting glue, and the battery further comprises a sealing member, and the sealing member is disposed in the limiting groove.
The battery according to claim 1, wherein the first case and the second case are fastened together, and the open end of the second case is accommodated in the open end of the first case The inner side of the open end of the first casing is provided with a connecting groove, the step surface at the bottom of the connecting groove abuts the open end of the second casing, and the sealant is filled in the connecting groove.
The battery of claim 10, wherein the second groove communicates with the connecting groove.
11. The battery according to claim 10, wherein the inner side wall of the connecting groove is provided with a first buckle, the outer side wall of the second casing is provided with a second buckle, and the first buckle is connected with the The second snap fit.
11. The battery according to claim 10, wherein a third groove is provided on the stepped surface, a fourth raised rib is provided on the open end of the second casing, and the fourth raised rib accommodates in the third groove.
The battery according to claim 1, wherein the casing is further provided with a waterproof and breathable membrane, and the waterproof and breathable membrane is used to adjust the internal pressure of the casing.
The battery according to claim 1, wherein the first casing is further provided with an accommodating groove, and the accommodating groove is located between the first groove and the second accommodating cavity.