CN210136922U

CN210136922U - Battery module and battery pack

Info

Publication number: CN210136922U
Application number: CN201921275290.5U
Authority: CN
Inventors: 姜利文; 方伍梅
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-03-10
Anticipated expiration: 2029-08-07

Abstract

The utility model provides a battery module and battery package. The battery module comprises a plurality of battery units stacked along the height direction, each battery unit comprises a support frame and a battery, each support frame comprises a heat insulation plate and a surrounding frame surrounding the periphery of the heat insulation plate, the surrounding frame and the heat insulation plate form a first accommodating cavity along the opening of the height direction, and the battery is accommodated in the first accommodating cavity and attached to the heat insulation plate. In the battery module according to the utility model, the heat insulation plate and the surrounding frame form an integrated structure for accommodating the battery, so that the battery only needs to be assembled into the corresponding accommodating cavity when being assembled and the battery is attached to the heat insulation plate, thereby reducing the complexity of the assembly of the battery module; in addition, the accommodating cavity plays a role in positioning the battery, the problem of alignment between the battery and the heat insulation pad in the prior art is not needed to be considered, and the assembly efficiency of the battery module is improved.

Description

Battery module and battery pack

Technical Field

The utility model relates to a battery field especially relates to a battery module and battery package.

Background

As for the new energy power battery, a pouch type secondary battery and a can type secondary battery may be classified according to the type of the case. The case of the pouch-type secondary battery is made of a laminate sheet including a polymer layer and a metal layer. The outer case of the can-type secondary battery is generally composed of a metal case and a metal top cover sheet. In a battery module assembled by pouch type secondary batteries, in order to maintain thermal insulation between adjacent pouch type secondary batteries, it is generally necessary to attach a thermal insulation pad between the adjacent pouch type secondary batteries, and then a plurality of pouch type secondary batteries and the thermal insulation pad attached between the adjacent pouch type secondary batteries are assembled into a battery module, in which the thermal insulation pad is attached between every two adjacent pouch type secondary batteries at the time of assembly, and the thermal insulation pad should be maintained in alignment with the pouch type secondary batteries during the attachment of the thermal insulation pad, whereby the assembly process of the battery module is complicated, and the assembly efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of the problem that exists among the background art, the utility model aims to provide a battery module and battery package, it can guarantee to insulate against heat between the adjacent battery, reduces the number of times of pasting the heat insulating mattress, improves battery module's packaging efficiency.

In order to realize the above object, in a first aspect, the utility model provides a battery module, it includes that a plurality of battery cell that pile up the setting along the direction of height, each battery cell includes support frame and battery, and the support frame includes the heat insulating board and centers on the frame that encloses in the heat insulating board periphery, encloses frame and heat insulating board formation and accepts the chamber along the direction of height open-ended is first, and the battery is acceptd in first accepting the chamber and is laminated with the heat insulating board.

In an embodiment, the frame of the supporting frame and the thermal insulation board further form a second accommodating cavity with an opening along the height direction, the first accommodating cavity is located on the upper side of the thermal insulation board, the second accommodating cavity is located on the lower side of the thermal insulation board, the second accommodating cavity accommodates a battery, and the battery accommodated in the second accommodating cavity is attached to the thermal insulation board.

In an embodiment, the battery module further includes a first heat insulation pad sandwiched between the adjacent battery units, and batteries located at two sides of the first heat insulation pad in the two adjacent battery units are respectively attached to the first heat insulation pad.

In one embodiment, the battery module further includes a lower cover assembly and a second heat insulation pad stacked below the plurality of battery cells, the lower cover assembly includes a lower cover and a battery, the lower cover forms a third accommodating cavity which is upwardly opened along a height direction, the third accommodating cavity accommodates the battery, the second heat insulation pad is clamped between the lower cover assembly and an adjacent battery cell, and the battery in the third accommodating cavity and the battery in the adjacent second accommodating cavity are respectively attached to the second heat insulation pad.

In one embodiment, the battery module further includes an upper cover assembly and a third heat insulation pad stacked above the plurality of battery cells, the upper cover assembly includes an upper cover and a battery, the upper cover forms a fourth accommodating cavity which is opened downward in the height direction, the battery is accommodated in the fourth accommodating cavity, the third heat insulation pad is sandwiched between the upper cover assembly and the adjacent battery cell, and the battery in the fourth accommodating cavity and the battery in the adjacent first accommodating cavity are respectively attached to the third heat insulation pad.

In one embodiment, the batteries accommodated in the first accommodating cavity are multiple and arranged side by side along the width direction.

In one embodiment, each battery is a pouch type secondary battery and includes a main body part and electrode terminals having opposite polarities, the main body part is received in the first receiving cavity, and the electrode terminals are connected to the side of the main body part in the length direction and extend out of the first receiving cavity.

In one embodiment, the frame of the support frame is provided with grooves, and the electrode terminal of each battery extends out of the corresponding groove.

In order to achieve the above object, in a second aspect, the present invention provides a battery pack, which includes a lower case and a battery module according to the first aspect of the present invention, wherein the battery module is fixed in the lower case.

In one embodiment, the battery module is fixed in the lower case via an adhesive.

The utility model has the advantages as follows: in the battery module according to the utility model, the heat insulation plate and the surrounding frame form an integrated structure for accommodating the battery, so that the battery only needs to be assembled into the corresponding accommodating cavity during assembly and the battery is attached to the heat insulation plate, compared with the prior art, the times for adhering the heat insulation pad are reduced, and the complexity of the assembly of the battery module is reduced; in addition, the accommodating cavity plays a role in positioning the battery, the problem of alignment between the battery and the heat insulation pad in the prior art is not needed to be considered, and the assembly efficiency of the battery module is improved.

Drawings

Fig. 1 is an assembly view of a battery module according to the present invention.

Fig. 2 is an enlarged view of a circled portion in fig. 1.

Fig. 3 is a partially exploded view of fig. 1.

Fig. 4 is an assembly view of the battery cell in fig. 1.

Fig. 5 is an exploded view of fig. 4.

Fig. 6 is an enlarged view of a circled portion in fig. 4.

Fig. 7 is a perspective view of a battery pack according to the present invention.

Wherein the reference numerals are as follows:

m Battery module 3 lower cover subassembly

1 lower cover of battery unit 31

Third containing cavity of 11 support frame S3

111 heat shield 4 second insulation pad

112 surrounding frame 5 upper cover assembly

R groove 51 upper cover

S1 first containing cavity S4 fourth containing cavity

S2 third heat insulation pad of second containing cavity 6

12 batteries C lower box

121 body part H in height direction

122 width direction of electrode terminal W

2 first insulating mat L in the longitudinal direction

Detailed Description

The accompanying drawings illustrate embodiments of the present invention and it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms, and therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

As shown in fig. 7, the battery pack according to the present invention includes a lower case C and a plurality of battery modules M, each of which is fixed to the lower case C. In one embodiment, each battery module M is fixed in the lower case C via an adhesive. The battery module M adopts an adhesive fixing mode, so that the use of additional mechanical parts is omitted, the overall weight of the battery pack is reduced, meanwhile, the space occupied by the mechanical parts when the mechanical parts are fixed is saved, and the energy density of the battery pack is improved.

As shown in fig. 1 to 3, the battery module M includes a plurality of battery cells 1 stacked in the height direction H. The battery module M may further include a first heat insulating mat 2, a lower cover assembly 3, a second heat insulating mat 4, an upper cover assembly 5, and a third heat insulating mat 6.

As shown in fig. 4 to 6, each battery unit 1 includes a support frame 11 and a battery 12.

The support frame 11 includes a heat insulation plate 111 and a surrounding frame 112 surrounding the periphery of the heat insulation plate 111. In one embodiment, the heat insulation board 111 and the enclosure frame 112 are integrally formed, the heat insulation board 111 may be made of a polypropylene plastic foam material (EPP for short), and the EPP material is used as the heat insulation board, so that the heat insulation board has the characteristics of light specific gravity, strong heat insulation capability and good buffering performance. The enclosure frame 112 may be made of plastic or metal. The surrounding frame 112 is provided with a groove R recessed inward from an end of the supporting frame 11 in the height direction H. The grooves R allow electrode terminals 122 of the battery 12, which will be described later, to protrude from the surrounding frame 112.

The surrounding frame 112 and the heat insulating plate 111 form a first receiving cavity S1 opened in the height direction H, and the battery 12 is received in the first receiving cavity S1 and attached to the heat insulating plate 111. In the battery module M according to the present invention, the supporting frame 11 includes the heat insulating plate 111 and the surrounding frame 112 surrounding the periphery of the heat insulating plate 111, and the heat insulating plate 111 and the surrounding frame 112 form an integrated structure for accommodating the battery 12, so that the battery 12 only needs to be assembled into the corresponding accommodating cavity (the first accommodating cavity S1) during the assembly and the battery 12 is attached to the heat insulating plate 111, and this assembly process avoids the process of sequentially attaching each battery 12 to the heat insulating pad in the known art, reduces the number of times of attaching the heat insulating pad, and reduces the complexity of assembling the battery module M; in addition, the batteries 12 are accommodated in the corresponding accommodating cavities, and the accommodating cavities play a role in positioning the batteries 12, so that the problem of alignment between the batteries 12 and the heat insulation pad in the prior art does not need to be considered, and the assembly efficiency of the battery module M is improved.

In one embodiment, as shown in fig. 5, the surrounding frame 112 and the heat insulating board 111 further form a second receiving cavity S2 opened in the height direction H. The first receiving cavity S1 is located at an upper side of the heat insulation plate 111, and the second receiving cavity S2 is located at a lower side of the heat insulation plate 111. The second receiving cavity S2 receives the battery 12, and the battery 12 received in the second receiving cavity S2 is attached to the heat insulating plate 111. The heat insulation plate 111 and the enclosure frame 112 form a first accommodating cavity S1 and a second accommodating cavity S2 on the upper side and the lower side along the height direction H, so that the batteries 12 can be accommodated on both sides of the support frame 11, the energy density of the battery module M is improved, meanwhile, the heat insulation plate 111 plays a heat insulation role on the batteries 12 in the first accommodating cavity S1 and the second accommodating cavity S2, heat transfer between the batteries 12 adjacent to each other in the height direction H is prevented, mutual influence between the adjacent batteries 12 due to heat is prevented, and the safety of the battery module M is improved; in addition, the heat insulation plate 111 and the surrounding frame 112 form an integrated structure for accommodating the battery 12, so that the battery 12 can be directly fixed in the corresponding accommodating cavity (the first accommodating cavity S1 or the second accommodating cavity S2), thereby avoiding the process of sequentially adhering heat insulation pads to the batteries 12 arranged along the height direction H, simplifying the assembly process of the battery module M, and improving the assembly efficiency of the battery module M. In one embodiment, each of the batteries 12 disposed in the first receiving cavity S1 and the second receiving cavity S2 is attached to the heat insulation board 111 via an adhesive.

When the enclosure frame 112 and the heat insulation board 111 of the support frame 11 form the first receiving cavity S1 and the second receiving cavity S2 that are open at the upper and lower sides in the height direction H, the first heat insulation pad 2 is sandwiched between the adjacent battery units 1, and the batteries 12 located at the two sides of the first heat insulation pad 2 in the two adjacent battery units 1 are respectively attached to the first heat insulation pad 2. The first heat insulating mat 2 can prevent heat transfer between the batteries 12 at both sides in the height direction H thereof, prevent adjacent batteries 12 from being affected by each other due to heat, and improve the safety of the battery module M. When the depths of the first and second receiving cavities S1 and S2 in the height direction H are respectively greater than the thickness of the battery 12 as described above, the upper and lower ends of the first heat insulating pad 2 in the height direction H are respectively inserted into the second receiving cavity S2 and the first receiving cavity S1 facing each other in the adjacent battery unit 1, so that the first heat insulating pad 2 can be directly positioned in the first receiving cavity S1 and the second receiving cavity S2 at the time of assembly, and the assembly efficiency of the battery module M is improved without considering the centering problem of the first heat insulating pad 2, compared to the known art. In one embodiment, referring to fig. 1 and 2, at least a portion of the first heat insulating pad 2 in the height direction H is exposed, and the first heat insulating pad 2 can play a role of buffering when the battery module M is impacted or vibrated, thereby preventing the battery 12 in each battery unit 1 from being damaged and improving the safety of the battery module M. The surface of the first heat insulation pad 2 in the height direction H is fixed with the adjacent battery 12 through the adhesive, and the fixing mode avoids the battery module M from being fixed by mechanical parts in the assembling process, reduces the assembling complexity of the battery module M, reduces the whole weight of the battery module M and improves the energy density of the battery module M.

The lower cap assembly 3 is stacked under the plurality of battery cells 1. The lower cover assembly 3 includes a lower cover 31 and a battery 12. The material of the lower cover 31 may be plastic or metal. The lower cover 31 forms a third housing cavity S3 opened upward in the height direction H, and the battery 12 is housed in the third housing cavity S3.

The second heat insulating mat 4 is interposed between the lower cover member 3 and the adjacent battery cell 1, and the battery 12 in the third receiving cavity S3 and the battery 12 in the adjacent second receiving cavity S2 are respectively attached to the second heat insulating mat 4. Likewise, when the depths of the third receiving cavity S3 and the second receiving cavity S2 adjacent thereto in the height direction H are respectively greater than the thickness of the battery 12, the upper end and the lower end of the second heat insulating mat 4 in the height direction H are respectively fitted into the second receiving cavity S2 in the battery cell 1 adjacent to the lower cap assembly 3 and the third receiving cavity S3 of the lower cap assembly 3, and at least part of the second heat insulating mat 4 in the height direction H is exposed. The second heat insulating mat 4 may prevent heat transfer between the battery 12 received in the third receiving cavity S3 and the battery 12 in the adjacent second receiving cavity S2, prevent the adjacent batteries 12 from affecting each other due to heat, and improve the safety of the battery module M; in addition, the second heat insulating mat 4 can buffer the battery module M when the battery module M is subjected to impact or vibration.

The cap assembly 5 is stacked over the plurality of battery cells 1. The upper cover assembly 5 includes an upper cover 51 and a battery 12. The material of the upper cover 51 may be plastic or metal. The upper cover 51 forms a fourth housing cavity S4 that opens downward in the height direction H, and the fourth housing cavity S4 houses the battery 12.

The third heat insulating spacer 6 is interposed between the upper cover assembly 5 and the adjacent battery cell 1, and the battery 12 in the fourth receiving cavity S4 and the battery 12 in the first receiving cavity S1 adjacent to the fourth receiving cavity S4 are respectively attached to the third heat insulating spacer 6. Similarly, when the depths of the fourth receiving cavity S4 and the first receiving cavity S1 adjacent thereto in the height direction H are respectively greater than the thickness of the battery 12, the upper end and the lower end of the third heat insulating pad 6 in the height direction H are respectively fitted into the fourth receiving cavity S4 of the lid assembly 5 and the first receiving cavity S1 adjacent to the fourth receiving cavity S4, and at least a portion of the third heat insulating pad 6 in the height direction H is exposed. Similarly, the function of the third insulation mat 6 is the same as that of the second insulation mat 4, and will not be described in detail. The materials of the first heat insulating mat 2, the second heat insulating mat 4 and the third heat insulating mat 6 are the same as those of the heat insulating board 111 described above, and detailed description thereof is omitted.

In the battery module M according to the present invention, the batteries 12 accommodated in the first accommodation chamber S1 are plural and arranged side by side in the width direction W; correspondingly, the number of the batteries 12 accommodated in the second accommodating cavity S2, the third accommodating cavity S3 and the fourth accommodating cavity S4 is also plural and the same as the number of the batteries 12 in the first accommodating cavity S1, and the batteries 12 in the plural cavities (the first accommodating cavity S1, the second accommodating cavity S2, the third accommodating cavity S3 and the fourth accommodating cavity S4) form a plurality of battery rows arranged in the width direction W. Each cavity accommodates a plurality of batteries 12, so that the batteries 12 are assembled in the corresponding accommodating cavities at the same time, and the energy density of the battery module M is improved. As shown in fig. 5, each of the batteries 12 is a pouch-type secondary battery and includes a main body portion 121 and electrode terminals 122 of opposite polarities, the electrode terminals 122 of opposite polarities being disposed on the same side in the longitudinal direction L of the main body portion 121; of course, the electrode terminals 122 having opposite polarities may be provided on both sides of the body portion 121 in the longitudinal direction L. The body portion 121 of the battery 12 positioned in the first receiving cavity S1 is received in the first receiving cavity S1, and the electrode terminal 122 is connected to a side of the body portion 121 in the longitudinal direction L and protrudes out of the first receiving cavity S1. The main body 121 of the battery 12 located in the second receiving cavity S2 is received in the second receiving cavity S2, and the electrode terminal 122 is connected to the side of the main body 121 in the longitudinal direction L and protrudes out of the second receiving cavity S2, specifically, the electrode terminal 122 protrudes out through the groove R of the surrounding frame 112 described above. Similarly, the body portion 121 of the battery 12 positioned in the third housing cavity S3 is housed in the third housing cavity S3, and the electrode terminal 122 is connected to the side of the body portion 121 in the longitudinal direction L and protrudes out of the third housing cavity S3; the body portion 121 of the battery 12 positioned in the fourth receiving cavity S4 is received in the fourth receiving cavity S4, and the electrode terminal 122 is connected to a side of the body portion 121 in the longitudinal direction L and protrudes out of the fourth receiving cavity S4. Specifically, the upper cover 51 and the lower cover 31 described above also form the groove R, the groove R of the upper cover 51 is recessed inward in the height direction H from the end of the upper cover 51, and the electrode terminal 122 of the battery 12 accommodated in the fourth accommodation chamber S4 protrudes out of the upper cover 51 via the groove R of the upper cover 51; the groove R of the lower cover 31 is recessed inward in the height direction H from the end of the lower cover 31, and the electrode terminal 122 of the battery 12 accommodated in the third accommodation chamber S3 protrudes out of the lower cover 31 through the groove R of the lower cover 31. The electrode terminals 122 of the respective cell rows protruding from the respective cavities (the first receiving cavity S1, the second receiving cavity S2, the third receiving cavity S3, and the fourth receiving cavity S4) are aligned in the height direction H. The protruding electrode terminals 122 are electrically connected via electrical connections (not shown) so as to connect the plurality of cells 12 in series and/or in parallel.

The above detailed description describes exemplary embodiments, but is not intended to limit the combinations explicitly disclosed herein. Thus, unless otherwise specified, various features disclosed herein can be combined together to form a number of additional combinations that are not shown for the sake of brevity.

Claims

1. The battery module (M) is characterized by comprising a plurality of battery units (1) stacked along the height direction (H), each battery unit (1) comprises a support frame (11) and a battery (12), each support frame (11) comprises a thermal insulation plate (111) and a surrounding frame (112) surrounding the periphery of the thermal insulation plate (111), the surrounding frame (112) and the thermal insulation plate (111) form a first accommodating cavity (S1) with an opening along the height direction (H), and the battery (12) is accommodated in the first accommodating cavity (S1) and attached to the thermal insulation plate (111).

2. The battery module (M) according to claim 1,

the frame (112) and the heat insulation board (111) of the support frame (11) further form a second accommodating cavity (S2) with an opening along the height direction (H), the first accommodating cavity (S1) is located on the upper side of the heat insulation board (111), the second accommodating cavity (S2) is located on the lower side of the heat insulation board (111), the second accommodating cavity (S2) accommodates the battery (12), and the battery (12) accommodated in the second accommodating cavity (S2) is attached to the heat insulation board (111).

3. The battery module (M) according to claim 2,

the battery module (M) further comprises a first heat insulation pad (2) clamped between the adjacent battery units (1), and batteries (12) located on two sides of the first heat insulation pad (2) in the two adjacent battery units (1) are respectively attached to the first heat insulation pad (2).

4. The battery module (M) according to claim 2,

the battery module (M) further includes a lower cover assembly (3) and a second heat insulating mat (4) stacked under the plurality of battery cells (1),

the lower cover assembly (3) comprises a lower cover (31) and a battery (12), the lower cover (31) forms a third containing cavity (S3) which is opened upwards along the height direction (H), the third containing cavity (S3) contains the battery (12),

the second heat insulation pad (4) is clamped between the lower cover assembly (3) and the adjacent battery unit (1), and the battery (12) in the third containing cavity (S3) and the battery (12) in the adjacent second containing cavity (S2) are respectively attached to the second heat insulation pad (4).

5. The battery module (M) according to claim 2,

the battery module (M) further includes an upper cover assembly (5) and a third heat insulating mat (6) stacked over the plurality of battery cells (1),

the upper cover assembly (5) includes an upper cover (51) and a battery (12), the upper cover (51) forms a fourth receiving cavity (S4) which is opened downwards along the height direction (H), the fourth receiving cavity (S4) receives the battery (12),

the third heat insulation pad (6) is clamped between the upper cover assembly (5) and the adjacent battery unit (1), and the battery (12) in the fourth containing cavity (S4) and the battery (12) in the adjacent first containing cavity (S1) are respectively attached to the third heat insulation pad (6).

6. The battery module (M) according to claim 1,

the batteries (12) accommodated in the first accommodation chamber (S1) are plural and arranged side by side in the width direction (W).

7. The battery module (M) according to claim 6,

each battery (12) is a pouch-type secondary battery and includes a main body portion (121) and electrode terminals (122) having opposite polarities, the main body portion (121) being housed in the first housing cavity (S1), the electrode terminals (122) being connected to the side of the main body portion (121) in the longitudinal direction (L) and protruding out of the first housing cavity (S1).

8. The battery module (M) according to claim 7,

the surrounding frame (112) of the supporting frame (11) is provided with a groove (R),

the electrode terminals (122) of the respective cells (12) protrude from the corresponding grooves (R).

9. A battery pack, characterized by comprising a lower case (C) and a battery module (M) according to any one of claims 1 to 8, the battery module (M) being fixed in the lower case (C).

10. The battery pack according to claim 9, wherein the battery module (M) is fixed in the lower case (C) via an adhesive.