CN113078400A

CN113078400A - Casing, group battery and power consumption device

Info

Publication number: CN113078400A
Application number: CN202110328391.XA
Authority: CN
Inventors: 肖良针
Original assignee: Ningde Amperex Technology Ltd; Dongguan Poweramp Technology Ltd
Current assignee: Ningde Amperex Technology Ltd; Dongguan Poweramp Technology Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-07-06
Anticipated expiration: 2041-03-26
Also published as: WO2022199153A1

Abstract

A shell is provided with an accommodating space, an open slot is formed in the side wall of the shell, the shell further comprises a first slot part and a second slot part, the first slot part comprises a first connecting part and a second connecting part, the first connecting part is connected to the side wall and extends into the accommodating space from the side wall, the second connecting part is arranged at one end, away from the open slot, of the first connecting part, and the second connecting part, the first connecting part and the side wall form a first accommodating groove for accommodating an insulator; the second groove part is connected with the second connecting part and provided with a second accommodating groove, and the open groove and the second accommodating groove are used for allowing the connecting piece to extend out of the accommodating space. And also to a battery pack using the above case. Also relates to an electric device using the battery pack. According to the scheme, the first accommodating groove for accommodating the insulator is arranged, so that the using amount of the insulator is reduced.

Description

Casing, group battery and power consumption device

Technical Field

The application relates to the technical field of lithium batteries, in particular to a shell, a battery pack and an electric device.

Background

In the production and manufacturing process of the battery, the battery is assembled by using an upper and lower shell-closing manner, and some hole sites for the wiring harness or other components to penetrate through are arranged on the assembled battery. During the use of the battery, the air tightness of the hole sites needs to be ensured so as to reduce the problem that liquid permeates into the battery through the hole sites to cause short circuit or other safety problems when the battery is used. In the existing method, the wire harness and the hole sites are usually plugged by adding a sealing gasket or applying glue to the hole sites. Through the mode of addding sealed pad, need the manual work to seal up the hole site department of assembling to battery case to material and cost of labor have been increased, and the problem that production efficiency is low appears. And the manual assembly of the gasket easily causes a gap between the gasket and the wire harness or other components, and the problem of poor sealing reliability occurs. The reliability of hole position and wire harness and other parts sealing can be guaranteed through the gluing sealing mode, but because the existing battery shell is not provided with a glue flowing structure, the glue consumption can not be controlled, a large amount of glue is wasted, and the glue is easy to remain outside the shell to influence the appearance quality of the battery.

Disclosure of Invention

In view of the above, it is desirable to provide a casing, a battery pack and an electric device with good sealing reliability and reduced glue consumption.

An embodiment of the application provides a housing, the housing is provided with an accommodating space, a first side wall of the housing is provided with an open slot, the housing further comprises a first slot portion and a second slot portion, the first slot portion comprises a first connecting portion and a second connecting portion, the first connecting portion is connected to the first side wall and extends into the accommodating space from the first side wall, the second connecting portion is arranged at one end, deviating from the open slot, of the first connecting portion, and the second connecting portion, the first connecting portion and the first side wall form a first accommodating slot for accommodating an insulator; the second groove part is connected with the second connecting part and provided with a second accommodating groove, and the open groove and the second accommodating groove are used for allowing the connecting piece to extend out of the accommodating space.

According to the scheme, the connecting piece extends out of the second containing groove and the open groove, and when the connecting piece extends out, part of the connecting piece is arranged in the first containing groove, and the connecting piece is fixed in the first containing groove by pouring the insulator in the first containing groove, so that the sealing effect is achieved.

In a possible implementation manner, the second groove portion extends from the second connecting portion to the direction of the opening groove.

According to the scheme, the second groove part extends from the second connecting part to the direction of the open groove, so that the connecting piece extending out of the accommodating space can extend out of the second groove part and the open groove.

In a possible implementation manner, the second groove portion includes a first section and a second section which are sequentially arranged, the first section is connected to the second connecting portion, and the second section is obliquely arranged relative to the first section.

The scheme is that the second section is obliquely arranged relative to the first section so as to clamp the connecting piece in the second section when the cross-sectional area of the second section is smaller than that of the first section; when the cross-sectional area of the second section is greater than the cross-sectional area of the first section, the first section is facilitated to receive more insulator.

In a possible implementation manner, a gap between the second groove portion and the first side wall is not less than 1 mm.

According to the scheme, the distance between the second groove part and the first side wall is not less than 1mm, so that after the insulator is poured and solidified, the thickness of the insulator between the second groove part and the first side wall is not less than 1mm, and the sealing effect of the shell is improved.

In one possible implementation manner, the second groove portion extends from the second connecting portion to a direction away from the opening groove.

The above solution enables the connecting piece extending from the accommodating space to extend from the second groove part and the opening groove by extending the second groove part from the second connecting part to the direction back to the opening groove.

In a possible implementation manner, an end of the second groove portion facing away from the first side wall is provided with a second chamfer.

Through setting up the second chamfer to reduce the connecting piece when stretching into the second basin piece fish tail.

In a possible implementation manner, a distance from one end of the second groove portion, which faces away from the second connection portion, to the second connection portion is not less than 1 mm.

According to the scheme, the distance from one end of the second groove part, which is far away from the second connection part, to the second connection part is not less than 1mm, so that when the insulator penetrates into the second accommodating groove, the insulator is solidified on the inner wall of the second accommodating groove without penetrating through the second accommodating groove, and the insulator is limited to flow into the accommodating space to influence the performance of the battery cell module.

In a possible implementation manner, the first side wall is provided with a third groove portion at an outer edge of the open groove, and the third groove portion is located in the first accommodating groove.

According to the scheme, the third groove part is arranged, so that the insulator is displayed in the third groove part after the first accommodating groove is filled with the insulator, and the phenomenon that the insulator overflows to the surface of the shell due to the fact that the insulator is filled too much is reduced.

In a possible implementation manner, one end of the third groove portion, which is away from the first side wall, is further provided with a step portion, and the step portion is located in the open groove.

According to the scheme, the step part is arranged, so that when the insulator is displayed on the third groove part, the step part can accommodate more insulators, and the phenomenon that the insulators overflow is limited is further facilitated.

A battery pack comprises a battery cell module, a connecting piece, an insulator and the shell; the battery cell module is arranged in the accommodating space; the connecting piece is connected to the battery cell module and extends out of the shell through the open slot and the second accommodating groove, and the connecting piece is partially arranged in the first accommodating groove; the insulator is provided in the first receiving groove and fixes the connector and the first groove.

According to the scheme, the shell is applied to the battery pack, so that the first accommodating groove is used for accommodating the insulator in the sealing process of the battery, and the loss of the insulator in the filling process is reduced.

In one possible implementation, the insulator is formed by setting a resin in the first receiving groove and then curing the resin.

In one possible implementation, there are two of the housings; the two shells are fixedly connected, so that the two accommodating spaces are spliced to form an accommodating cavity for accommodating the battery cell module, and the two open grooves are spliced to form a through hole communicated with the accommodating cavity; the two first groove parts are spliced, so that the two first accommodating grooves form a glue filling cavity communicated with the through hole, and the insulator is arranged in the glue filling cavity; the two second groove parts are spliced, so that the two second accommodating grooves form a converging channel facing the through hole.

An electric device comprises the battery pack.

According to the scheme, the first accommodating groove and the second accommodating groove which are used for accommodating the connecting piece and the insulator are formed in the shell, so that the connecting piece and the shell are favorably and fixedly connected, further, the insulator is formed by arranging resin in the first accommodating groove and then curing, other external impurities are limited from entering the shell, the service life of the battery pack is prolonged, the first accommodating groove limits the insulator from overflowing out of the shell, and the attractiveness of the battery pack is improved.

Drawings

Fig. 1 is a schematic perspective view illustrating a battery pack according to an embodiment.

Fig. 2 is a schematic structural view of the battery pack shown in fig. 1, in which an upper case is omitted.

Fig. 3 is a schematic structural view of the battery pack shown in fig. 2, in which the connection member is omitted.

Fig. 4 is a sectional view of the battery pack shown in fig. 3 taken along the direction i-i.

Fig. 5 is a schematic perspective view of the battery pack shown in fig. 3, with cells omitted.

Fig. 6 is a schematic perspective view of a battery pack in another embodiment, where a cell is omitted.

Fig. 7 is a sectional view of the battery pack shown in fig. 6 in a direction ii-ii.

Fig. 8 is a schematic perspective view of a battery pack in a third embodiment, with cells omitted.

Fig. 9 is a schematic perspective view of a battery pack in a fourth embodiment, with cells omitted.

Description of the main elements

Battery pack 100

Housing 10

First side wall 11

Open slot 111

Second side wall 12

Third side wall 13

Fourth side wall 14

Accommodating space 10a

Battery cell module 20

Battery cell 21

First groove portion 30

First connecting portion 31

Second connecting part 32

First receiving groove 33

Second groove portion 40

Second receiving groove 41

First section 42

Second section 43

Bundling groove 44

First chamfer 40a

First distance L1

Second distance L2

The third groove portion 50

Step 60

Connecting piece 70

Insulator 80

First direction A

Second direction B

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that 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 "on" another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like as used herein are for illustrative 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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Another embodiment of the present application further provides a battery pack, including a battery cell module, a connecting member, an insulator, and the above-mentioned housing; the battery cell module is arranged in the accommodating space; the connecting piece is connected to the battery cell module and extends out of the shell through the open slot and the second accommodating groove, and the connecting piece is partially arranged in the first accommodating groove; the insulator is provided in the first receiving groove and fixes the connector and the first groove.

In the battery pack provided above, the first groove extending into the housing space is provided in the case, and the first groove is provided with the first housing groove for housing the insulator. When the connecting piece is connected with the battery cell module and extends out of the shell along the second accommodating groove and the open groove, the first accommodating groove accommodates a certain amount of insulator so as to block a gap between the connecting piece and the second accommodating groove, so that the problem that the insulator flows into the shell or remains outside the shell due to the fact that the shell does not have a structure for accommodating the insulator is solved, the using amount of the insulator is reduced under the condition that the sealing of the connecting piece is ensured, and the appearance of the outside of the battery pack is improved.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Example one

Referring to fig. 1, 2 and 3, an embodiment of the present application provides a battery pack 100 including a cell module 20, a casing 10, a first slot portion 30, a second slot portion 40, a connecting member 70 and an insulator 80. The casing 10 is provided with an accommodating space 10a, the casing 10 includes a plurality of first side walls 11, the battery cell module 20 is accommodated in the accommodating space 10a, an open slot 111 is formed in the first side wall 11, the first slot portion 30 includes a first connecting portion 31 and a second connecting portion 32, the first connecting portion 31 is connected to the first side wall 11 and extends into the accommodating space 10a from the first side wall 11, and the second connecting portion 32 is arranged at one end of the first connecting portion 31, which deviates from the open slot 111. The second connecting portion 32, the first connecting portion 31 and the housing 10 form a first receiving groove 33, the second groove portion 40 connects the second connecting portion 32, the second groove portion 40 is provided with a second receiving groove 41, the connecting member 70 is connected to the cell module 20, the connecting member 70 extends out of the housing 10 through the opening groove 111 and the second receiving groove 41, the connecting member 70 is partially located in the first receiving groove 33, and the insulator 80 is provided in the first receiving groove 33 and is used for fixing the connecting member 70 and the first groove portion 30. The second groove portion 40 is located in the first receiving groove 33 as viewed along a first direction a perpendicular to the extending direction of the first connecting portion 31.

In one embodiment, the housing 10 includes a first sidewall 11 and a second sidewall 12 oppositely disposed along the second direction B, and a third sidewall 13 and a fourth sidewall 14 oppositely disposed along the third direction C. Preferably, the first sidewall 11 is provided with an open slot 111, and the first connecting portion 31 extends from the first sidewall 11 into the accommodating space 10 a. Preferably, the first connecting portion 31 extends from the first sidewall 11 into the accommodating space 10a along the second direction B. The first direction A and the second direction B are perpendicular to each other, and the third direction C is perpendicular to both the first direction A and the second direction B. Preferably, the first connecting portion 31 is connected to the end of the first sidewall 11 and is spaced from the opening groove 111 in the first direction a, so that the space of the first receiving groove 33 is larger to receive more insulators 80 and fix the connectors 70.

In one embodiment, the shape of the open slot 111 is one of a semi-circle, a semi-ellipse, a rectangle, and a petal shape. Wherein the petal shape comprises a plurality of partially overlapping semi-circles.

It should be noted that the shape of the open slot 111 is not limited to this, and may be other shapes that are adapted to the shape of the connecting member 70.

Referring to fig. 1, fig. 2 and fig. 3, the housing 10 is provided with an accommodating space 10a, and the battery cell module 20 is disposed in the accommodating space 10 a. In one embodiment, the battery pack 100 includes two cases 10. The two housings 10 can be fixedly connected, so that the accommodating spaces 10a on the two housings 10 are spliced to form an accommodating cavity (not shown) for accommodating the cell module 20.

In an embodiment, the housing 10 may include a top wall, which may be directly disposed on the housing 10 and enclose the receiving space 10 a.

It is understood that the number of the cases 10 assembled into the battery pack 100 is not limited thereto, and as in another embodiment, the number of the cases 10 may also be three, four, or five, etc., in order to assemble the battery pack 100 forming an irregular shape. When the plurality of housings 10 are spliced, the accommodating spaces 10a on each housing 10 are oppositely arranged to form accommodating cavities for accommodating the battery cells 21. A plurality of cases 10 are fixed to each other to form a specific-shaped battery pack 100.

Referring to fig. 2 and 3, the housing 10 includes a first sidewall 11, and an opening groove 111 is formed on the first sidewall 11, and the opening groove 111 communicates with the accommodating space 10 a. In one embodiment, the two housings 10 are assembled with each other such that the two opening grooves 111 are assembled to form a through hole (not shown) communicating with the receiving cavity. The connecting member 70 is connected to the cell module 20 and extends out of the through hole to be connected to an external device.

In some embodiments, the cell module 20 is formed by stacking a plurality of cells 21. And a plurality of the battery cells 21 may be arranged in series or in parallel with each other.

The first connection portion 31 and the second connection portion 32 form, in combination, a first receiving groove 33 for receiving the insulator 80. When the insulator 80 seals the connector 70 and the second receiving groove 41, the insulator 80 is received in the first receiving groove 33 of the cavity to reduce the loss of the insulator 80, thereby reducing the usage amount of the insulator 80 and the material use cost. In addition, by providing the cavity for accommodating the insulator 80, the insulator 80 is prevented from flowing into the casing 10 during pouring to affect the performance of the battery cell 21, and the insulator 80 is prevented from overflowing out of the casing 10 to affect the aesthetic appearance of the entire battery pack 100.

In one embodiment, there are two housings 10, and the first slots 30 of the two housings 10 are engaged, so that the two first receiving slots 33 of the two first slots 30 form a glue filling chamber (not shown) connected to the through hole.

In an embodiment, along the second direction B, the cross-sectional shape of the first connecting portion 31 is one of a semicircle, a semi-ellipse, a rectangle or a petal shape, wherein the petal shape includes a plurality of overlapping semicircles, the second connecting portion 32 is a flat plate structure, and the first connecting portion 31 and the second connecting portion 32 are combined to form the first groove portion 30.

In one embodiment, the insulator 80 includes a resin, and is poured into the first receiving groove 33 by way of pouring and is fixed, such as pouring sealant. It is understood that the type of the insulator 80 is not limited thereto, and the insulator 80 may also be a sealant as in another embodiment. Preferably, the insulator 80 may be first disposed in the first receiving groove 33, and then the connecting member 70 may be disposed in the second receiving groove 41 and extend out of the opening groove 111.

In another embodiment, the connecting member 70 may be disposed in the second receiving groove 41 and extended out of the opening groove 111, and then the insulator may be disposed in the first receiving groove 33.

Referring to fig. 2, fig. 3 and fig. 4, in an embodiment, the second slot portion 40 extends from the second connecting portion 32 to the opening groove 111. The second groove 40 is provided with a second housing groove 41. Preferably, the second housing groove 41 is provided in the first housing groove 33. Preferably, the second receiving groove 41 has a size larger than the opening groove 111 when viewed in a direction opposite to the second direction B, and a gap may be provided between the second receiving groove 41 and a partial section of the connecting member 70 disposed in the second receiving groove 41, and the gap may be provided with an adhesive to fix the connecting member 70 and the second groove portion 40. Preferably, when viewed in a direction opposite to the second direction B, in a sectional view of the second slot portion 40, the open slot 111 is located in the second slot portion 40, specifically, an opening size of the second receiving slot 41 is larger than an opening size of the open slot 111, and after the connecting element 70 passes through the second receiving slot 41 on the second slot portion 40, the connecting element can pass through the open slot 111 and extend out of the housing 10. It is understood that the arrangement direction of the second groove portion 40 is not limited thereto, and as in another embodiment, the second groove portion 40 may also extend from the first sidewall 11 or the first connection portion 31 into the receiving space 10 a.

In one embodiment, the gap between the second groove portion 40 and the first sidewall 11 is a first distance L1. In an embodiment, the first distance L1 is not less than 1mm, when the insulator 80 is poured into the first receiving groove 33, the insulator 80 is more concentrated in the space between the second groove portion 40 and the first sidewall 11, and after the insulator 80 is cured, a cured structure is formed between the second groove portion 40 and the first sidewall 11, so as to limit the entry of foreign matters into the housing 10, such as water into the housing.

In one embodiment, the housing 10 has two, and the two second slots 40 of the two housings 10 are combined together, so that the two second receiving slots 41 of the two second slots 40 form a converging channel (not shown) facing the opening slot 111, and the connecting member 70 extends out of the housing 10 through the converging channel and the opening slot 111.

It should be noted that when the connecting member 70 extends from the converging passage, a gap is formed between the connecting member 70 and the inner walls of the two second groove portions 40. At this time, the insulator 80 is poured into the glue filling bin and can permeate into the bundling channel from the glue filling bin so as to fill and block the gap between the connecting piece 70 and the bundling channel. After the insulator 80 is cured, the connecting member 70 is fixedly connected with the inner walls of the two second groove portions 40 to achieve sealing of the connecting member 70 at the constricted passage.

Referring to fig. 4, the second slot portion 40 is located in the first slot portion 30 as viewed along a first direction a, so as to guide the connecting element 70 from the second slot portion 40 into the first receiving slot 33, wherein the first direction a is perpendicular to the extending direction of the first connecting element 31.

Referring to fig. 5, a converging groove 44 is disposed at an end of the second groove portion 40 away from the first sidewall 11, and the converging groove 44 is connected to the second receiving groove 41 by a first chamfer 40 a. When the connecting member 70 is connected to the cell module 20 and extends into the second receiving groove 41, the connecting member 70 contacts with the converging groove 44 and the first chamfer 40a at the end of the second groove 40, so as to reduce the scratch problem caused by the contact and relative movement of the connecting member 70 with the sharp corner part on the second groove 40 when the connecting member 70 extends out of the casing 10 along the second receiving groove 41 and the opening groove 111.

The second groove portion 40 has a second distance L2 from the end facing away from the second connection portion 32 to the second connection portion 32. In one embodiment, the second distance L2 is not less than 1 mm. When the insulator 80 is poured, the insulator 80 penetrates from the first receiving groove 33 into the second receiving groove 41, and flows along the inner wall of the second receiving groove 41 toward the inside of the housing 10, and the length of the second distance L2 is set to be not less than 1mm, so that the insulator 80 is not yet flowed into the housing 10 when flowing in the second receiving groove 41, and is solidified on the inner wall of the second receiving groove 41.

In one embodiment, the cross-sectional shape of the second groove portion 40 along the second direction B is one of a semicircle, a semi-ellipse, a rectangle, and a petal shape. Wherein the petal shape comprises a plurality of partially overlapping semi-circles.

The shape of the second groove 40 is not limited to this, and may be another shape that matches the shape of the connector 70.

In one embodiment, the connector 70 is a wire harness, but obviously, the connector 70 is not limited thereto, and as in another embodiment, the connector 70 may also be a sheet-shaped metal piece or other connecting structure for connecting the battery cell 21 and the electric equipment.

The operation flow of one specific embodiment of the present application is as follows: first, the battery pack 100 is manufactured by connecting a plurality of battery cells 21 to each other in series or in parallel to form a cell module 20. The cell module 20 is placed in the accommodating space 10a in the casing 10.

Then, the connection member 70 connected to the cell module 20 passes through the second receiving groove 41, the first receiving groove 33, and the opening groove 111 to protrude outside the case 10, and performs a case-closing operation by fixedly connecting another case 10 to the case 10 in which the cell module 20 is placed.

Finally, the insulator 80 is filled into the glue filling bin along the through hole formed by splicing the two shells 10, so that the insulator 80 is filled into the glue filling bin. When the insulator 80 filled in the glue filling bin overflows the second groove 40, the insulator 80 flows into the housing 10 along the inner wall of the second receiving groove 41 to fill the gap between the connector 70 and the second receiving groove 41, and after the insulator 80 is cooled and solidified, the connector 70 and the second groove 40 are fixedly connected by the insulator 80, so as to achieve the sealing effect.

The battery pack 100 described above mainly deals with the case where the second groove 40 extends from the second connection portion 32 in the first direction a, and the cross-sectional area of the second groove 40 in the second direction B is always the same.

In the battery pack 100 provided as described above, the first groove portion 30 extending into the housing space 10a is provided in the case 10, and the first housing groove 33 for housing the insulator 80 is provided in the first groove portion 30. When the connecting member 70 is connected to the cell module 20 and extends out of the casing 10 along the second receiving groove 41 and the opening groove 111, the first receiving groove 33 receives a certain amount of the insulator 80 to close the gap between the connecting member 70 and the second receiving groove 41, thereby reducing the problem that the insulator 80 flows into the casing 10 or remains outside the casing 10 due to the casing 10 having no structure for receiving the insulator 80, reducing the usage amount of the insulator 80 while ensuring the sealing of the connecting member 70, and enhancing the external appearance of the battery pack 100.

Example two

Referring to fig. 6 and 7, the battery pack 100 of the second embodiment is substantially the same as that of the first embodiment, except that the first groove 30 includes a first section 42 and a second section 43 sequentially disposed. The first section 42 is connected to the second connecting portion 32, and the second section 43 is disposed obliquely to the first section 42.

In an embodiment, the second section 43 is inclined from the first section 42 to a direction close to the first connection portion 31, that is, the cross-sectional area of the second section 43 gradually increases as viewed along the first direction a. When the insulator 80 is poured into the first receiving groove 33 to seal the connecting member 70 and the second section 43, since the cross-sectional area of the second section 43 is relatively larger than that of the first section 42, the second section 43 can receive more insulator 80, so as to increase the stability of the connection between the connecting member 70 and the second section 43.

In another embodiment, the second section 43 is inclined from the first section 42 in a direction away from the first connection portion 31, that is, the cross-sectional area of the second section 43 gradually decreases as viewed in the first direction a. So that the inner wall of the second section 43 is constricted and the connection member 70 is clamped when the connection member 70 passes through the second section 43, thereby reducing the problem that the connection member 70 is separated from the second groove portion 40 due to the loose clamping of the connection member 70 during the manufacturing process of the battery pack 100.

The battery pack 100 described above is mainly directed to the case where the second groove 40 extends from the second connection portion 32 in the first direction a, and the second groove 40 has different cross-sectional areas in different sections. When the types of the connecting pieces 70 for connecting the battery cell 21 and the external electric equipment are different, the inclination direction of the second section 43 is adjusted to achieve the purpose of having different clamping effects on different connecting pieces 70.

EXAMPLE III

Referring to fig. 8, the battery pack 100 of the third embodiment is substantially the same as that of the first embodiment, except that the second groove 40 extends from the second connecting portion 32 in a direction away from the opening groove 111. When the insulator 80 is poured to seal the connection member 70 and the second groove portion 40, the thickness of the second connection portion 32 from the first sidewall 11 in the first direction a increases, i.e., the insulator 80 after being cooled and solidified has a greater thickness in the first direction a in the first receiving groove 33, so as to better reduce the air tightness problem existing at the opening groove 111.

Further, an end of the second groove portion 40 facing away from the first side wall 11 is provided with a second chamfer (not shown). When the connecting member 70 is connected to the cell module 20 and extends into the second accommodating groove 41, the connecting member 70 contacts with the second reverse side of the end of the second groove 40, so as to reduce the scratch problem caused by the contact and relative movement of the connecting member 70 with the sharp corner of the second groove 40 when the connecting member 70 extends out of the casing 10 along the second accommodating groove 41 and the opening groove 111.

The above-described battery pack 100 is mainly directed to the case where the air-tightness is poor at the open groove 111, but is also applicable to other battery packs 100 having no air-tightness requirement at the open groove 111.

Example four

Referring to fig. 9, the battery pack 100 of the fourth embodiment is substantially the same as the first embodiment, except that the first sidewall 11 is provided with a third groove 50 at the outer edge of the opening groove 111, preferably, the third groove 50 extends from the first sidewall 11 into the receiving space 10a, so that when the insulator 80 is poured, and the insulator 80 overflows from the first receiving groove 33 to the third groove 50, the observation is facilitated, and the problem that the appearance of the housing 10 is affected by the overflow of the insulator 80 due to the pouring of the excess insulator 80 is reduced.

In one embodiment, the cross-sectional area of the third groove portion 50 along the second direction B is one of a semi-circle, a semi-ellipse, a rectangle, and a petal shape. Wherein the petal shape comprises a plurality of partially overlapping semi-circles. It is understood that the shape of the cross-sectional area of the third groove portion 50 in the second direction B is not limited thereto, and as in another embodiment, the cross-sectional area of the third groove portion 50 in the second direction B may also be other shapes having the same shape as the connection member 70, and the like.

Further, the third groove portion 50 is located in the first accommodation groove 33 as viewed in the first direction a, so that the third groove portion 50 communicates with the first accommodation groove 33, and the insulator 80 that overflows from the first accommodation groove 33 can overflow into the third groove portion 50.

In one embodiment, the third slot portion 50 extends beyond the second slot portion 40 in a direction opposite the second direction B, i.e., the dimension of the third slot portion 50 in the second direction is greater than the dimension of the second slot portion 40 in the second direction, further limiting the insulator 80 from spilling during securement.

In one embodiment, the third groove portion 50 is disposed perpendicular to the first sidewall 11, but obviously, the third groove portion 50 is not limited thereto, and may be disposed on the first sidewall 11 at an angle as in another embodiment.

To further facilitate viewing of the insulator 80 that overflows from the first receiving groove 33 to the third groove 50, the end of the third groove 50 facing away from the first side wall 11 is further provided with a step 60. When the insulator 80 overflows from the third groove 50 from the first receiving groove 33, the overflowing insulator 80 appears on the step 60, so that the overflowing condition of the insulator 80 can be better observed.

The battery pack 100 described above is mainly directed to a case where the insulator 80 can overflow from the first receiving groove 33 to the third groove 50.

This scheme still provides an electric installation, and electric installation includes aforementioned group battery, and electric installation includes but not limited to two-wheeled electric motor car, four-wheel electric motor car, handheld electric tool, electronic cleaning device, unmanned aerial vehicle etc..

In addition, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present application, and that suitable changes and modifications to the above embodiments are within the scope of the disclosure of the present application as long as they are within the true spirit and scope of the present application.

Claims

1. The utility model provides a casing, its characterized in that, the casing is equipped with accommodating space, be provided with the open slot on the first lateral wall of casing, the casing still includes:

the first groove part comprises a first connecting part and a second connecting part, the first connecting part is connected to the first side wall and extends from the first side wall to the inside of the accommodating space, the second connecting part is arranged at one end, away from the open groove, of the first connecting part, and the second connecting part, the first connecting part and the first side wall form a first accommodating groove for accommodating an insulator;

and the second groove part is connected with the second connecting part and provided with a second accommodating groove, and the open groove and the second accommodating groove are used for allowing the connecting piece to extend out of the accommodating space.

2. The housing of claim 1, wherein the second slot portion extends from the second connecting portion in a direction toward the open slot.

3. The housing of claim 2, wherein the second slot portion includes a first section and a second section disposed in sequence, the first section being connected to the second connection portion, the second section being disposed obliquely relative to the first section.

4. The housing of claim 2, wherein a gap between the second slot portion and the first sidewall is not less than 1 mm.

5. The housing of claim 1, wherein the second slot portion extends from the second connecting portion in a direction away from the open slot.

6. The housing of claim 5, wherein an end of the second slot portion facing away from the first sidewall is provided with a second chamfer.

7. The housing according to claim 1, wherein a distance from an end of the second groove portion facing away from the second connection portion to the second connection portion is not less than 1 mm.

8. The housing of claim 1, wherein the first sidewall is provided with a third slot portion at an outer edge of the open slot, the third slot portion being located in the first receiving slot.

9. The housing of claim 8, wherein an end of the third slot portion facing away from the first sidewall is further provided with a step portion, and the step portion is located in the open slot.

10. A battery pack characterized by comprising a cell module, a connecting member, an insulator, and the casing according to any one of claims 1 to 9;

the battery cell module is arranged in the accommodating space;

the connecting piece is connected to the battery cell module and extends out of the shell through the open slot and the second accommodating groove, and the connecting piece is partially arranged in the first accommodating groove;

the insulator is provided in the first receiving groove and fixes the connector and the first groove.

11. The battery pack of claim 10, wherein there are two of said housings;

the two shells are fixedly connected, so that the two accommodating spaces are spliced to form an accommodating cavity for accommodating the battery cell module, and the two open grooves are spliced to form a through hole communicated with the accommodating cavity;

the two first groove parts are spliced, so that the two first accommodating grooves form a glue filling cavity communicated with the through hole, and the insulator is arranged in the glue filling cavity;

the two second groove parts are spliced, so that the two second accommodating grooves form a converging channel facing the through hole.

12. An electric device characterized by comprising the battery pack according to any one of claims 10 to 11.