CN219643026U

CN219643026U - Box body of battery pack, battery pack and electric equipment

Info

Publication number: CN219643026U
Application number: CN202321293663.8U
Authority: CN
Inventors: 何俊霖; 殷继炜; 曾而平; 郑卫鑫
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-05-25
Filing date: 2023-05-25
Publication date: 2023-09-05
Anticipated expiration: 2033-05-25

Abstract

The utility model discloses a box body of a battery pack, the battery pack and electric equipment, wherein the battery pack comprises a first battery module and a second battery module, the first battery module and the second battery module are stacked, the second battery module is arranged above the first battery module, the box body comprises a tray, a connecting fixing piece and a fastening piece, and the tray is used for fixing the first battery module. The connecting and fixing piece is used for fixedly connecting the second battery module and the tray. The fastener includes a first fastener for fixedly connecting the second battery module and the connection fixture. Above-mentioned box of battery package is fixed second battery module in the top of first battery module through connecting mounting and fastener, and first fastener is used for fixed connection second battery module and connecting the mounting, can make the fastener atress even, guarantees that battery package structure is firm.

Description

Box body of battery pack, battery pack and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a box body of a battery pack, the battery pack and electric equipment.

Background

For a battery pack having a double-layered battery module, the two-layered battery module is generally fixedly connected by a fastener. Because vibration can occur in the driving process, the upper layer battery module is large in mass, vibration and load born by a fastener positioned in the middle area of the battery pack body are large, a fracture phenomenon can occur, and the overall structural stability of the battery pack is influenced.

Disclosure of Invention

The embodiment of the utility model provides a box body of a battery pack, the battery pack and electric equipment.

The utility model provides a box body of a battery pack, which is used for fixing the battery pack with at least two layers of battery modules, wherein the battery pack comprises a first battery module and a second battery module, the first battery module and the second battery module are stacked, the second battery module is arranged above the first battery module, and the box body comprises: tray, connection fastener and fastener.

The tray is used for fixing the first battery module, the connection fixing piece is used for fixedly connecting the second battery module with the tray, the fastening piece comprises a first fastening piece, and the first fastening piece is used for fixedly connecting the second battery module with the connection fixing piece.

Above-mentioned box, through connecting mounting and first fastener with second battery module fixed in the top of first battery module, use first fastener fixed connection second battery module and connection mounting in the higher region of vibration and load that the battery package bore, can make the fastener atress even, guarantee that the battery package structure is firm.

In some embodiments, the tray is provided with a weight-reducing groove.

In some embodiments, the connection fixture includes a body and a reinforcing plate disposed perpendicular to the body for fixedly connecting with the second battery module and the tray.

In some embodiments, the second battery module includes a plurality of battery cell assemblies and side plates fixed to opposite sides of each of the battery cell assemblies, and the first fastener fixedly connects the side plates and the connection fixture.

In some embodiments, the side panels comprise square tubes that are hollow inside.

In some embodiments, the side plate is provided with a first connecting hole, the connecting fixing piece is provided with a second connecting hole, and the first fastening piece penetrates through the first connecting hole and the second connecting hole to fixedly connect the side plate and the connecting fixing piece.

In some embodiments, the fastener further comprises a second fastener, the second fastener is fixedly connected with the side plate, the connection fixing piece and the tray, the side plate is provided with a first connection hole, the connection fixing piece is provided with a third connection hole, the tray is provided with a fourth connection hole, and the second fastener penetrates through the first connection hole, the third connection hole and the fourth connection hole to be fixedly connected with the side plate, the connection fixing piece and the tray.

In some embodiments, the fastener further comprises a third fastener for fixedly connecting the connection fixture and the tray, the connection fixture is provided with a fifth connection hole, and the third fastener penetrates the fifth connection hole and the fourth connection hole to fixedly connect the connection fixture and the tray.

A battery pack according to an embodiment of the present utility model includes:

at least two layers of battery modules; and

the case of any one of the above embodiments.

The electric equipment comprises the battery pack.

Above-mentioned battery package and consumer are fixed two-layer or more than two-layer battery module through fixed knot constructs to the battery package, can guarantee that the fastener atress on the box is even in the use, guarantee that the battery package structure is firm to guarantee the security of consumer.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the present utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a perspective view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of section II of FIG. 1;

fig. 3 is a front view of a battery pack according to an embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of portion IV of FIG. 3;

FIG. 5 is a top view of a tray according to an embodiment of the utility model;

FIG. 6 is an enlarged schematic view of the portion VI of FIG. 5;

fig. 7 is a perspective view of a connection fixing plate according to an embodiment of the present utility model;

FIG. 8 is an enlarged schematic view of section VIII of FIG. 7;

fig. 9 is a partial perspective view of a battery pack according to an embodiment of the present utility model;

fig. 10 is another perspective view of a battery pack according to an embodiment of the present utility model;

fig. 11 is an enlarged schematic view of the portion xi in fig. 10.

Description of main reference numerals:

the battery pack comprises a battery pack body 100, a first battery module 101, a second battery module 102, a battery core assembly 103, a single battery core 104, a side plate 105 and a first connecting hole 106;

the box body-200, the connecting fixing piece-201, the body-2011, the reinforcing plate-2012, the second connecting hole-2013, the third connecting hole-2014, the fifth connecting hole-2015, the tray-202, the weight reducing groove-2021, the fourth connecting hole-2022, the first fastening piece-203, the second fastening piece-204 and the third fastening piece-205.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the embodiments of the present utility model and are not to be construed as limiting the embodiments of the present utility model.

In an embodiment of the utility model, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different structures of embodiments of the utility model. In order to simplify the disclosure of embodiments of the present utility model, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Embodiments of the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and do not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present utility model provide examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 and 2, a case 200 of a battery pack 100 according to an embodiment of the present utility model is used for fixing a battery pack 100 having at least two layers of battery modules, the battery pack 100 includes a first battery module 101 and a second battery module 102, the first battery module 101 and the second battery module 102 are stacked, the second battery module 102 is disposed above the first battery module 101, and the case 200 includes a tray 202, a connection fixing member 201 and a fastening member.

The tray 202 is used for fixing the first battery module 101, the connection fixing member 201 is used for fixedly connecting the second battery module 102 and the tray 202, the fastening member comprises a first fastening member 203, and the first fastening member 203 is used for fixedly connecting the second battery module 102 and the connection fixing member 201.

Above-mentioned box 200 of battery package 100 is fixed second battery module 102 in the top of first battery module 101 through connecting mounting 201 and first fastener 203, uses first fastener 203 fixed connection second battery module 102 and connecting mounting 201 in the higher region of vibration and load that battery package 100 bore, can make the fastener atress even, guarantees that battery package 100 structure is firm.

Specifically, when the battery pack 100 has two or more layers of battery modules, the second battery module 102 located at the upper layer has a larger mass, and in use, due to vibration of the vehicle, the fastening members located at the two ends of the battery pack 100 are stressed more and have a longer moment, so that the fastening members located at the two ends of the battery pack 100 generate a cracking phenomenon, which causes hidden danger to the structural safety of the body of the battery pack 100.

The case 200 of the battery pack 100 is analyzed according to the above-described problems, and design and simulation tests are performed for the installation positions of the fasteners, the types of the fasteners, and the number of the fasteners, taking bolts as the fasteners, to finally draw conclusions: 1. the grade of the bolt is high, so that the fatigue limit can be improved; 2. the number of the fixing bolts is increased on the fixing beam, so that the bolt stress can be reduced; 3. bolt shortening can reduce bolt stress. Accordingly, the design scheme of the case 200 of the battery pack 100 according to the embodiment of the present utility model is obtained.

Two kinds of fasteners with different lengths are used in the box 200 of the battery pack 100 to fix two sides and a middle area of the second battery module 102 respectively, as shown in fig. 1, the first battery module 101 and the second battery module 102 may include a plurality of battery core assemblies 103, the battery core assemblies 103 are arranged along the left-right direction in the figure, each two adjacent battery core assemblies 103 are fixedly connected with the connecting fixing piece 201 by using the first fastener 203, as shown in fig. 10, two connecting fixing plates 201 are arranged on the front side and the rear side of one box 200 on the two sides of the battery core assembly 103, so that the stress of the fasteners on each position of the box 200 is more uniform, thereby ensuring the stable structure of the battery pack 100 and improving the safety of the battery pack 100 in the use process.

Referring to fig. 5, in some embodiments, a weight-reducing groove 2021 is formed in the tray 202.

In this way, the overall weight of the battery pack 100 and the case 200 thereof can be reduced.

Specifically, the tray 202 is located at the bottom of the case 200 for fixing the first battery module 101 and the second battery module 102 by the connection fixing member 201, the weight-reducing groove 2021 is formed on the tray 202, the periphery of the tray 202 is used for mounting and fixing the battery module and the connection fixing member 201, and the weight-reducing groove 2021 can reduce the weight of the tray 202, on the one hand, can maintain the stability of the structure of the tray 202, and on the other hand, can reduce the weight of the battery pack 100 having the fixing structure.

Referring to fig. 7 and 8, in some embodiments, the connection fixture 201 includes a body 2011 and a reinforcing plate 2012 disposed perpendicular to the body, and the reinforcing plate 2012 is fixedly connected with the second battery module 102 and the tray 202.

In this way, the connection fixture 201 can be made to have high strength while reducing the overall weight of the connection fixture 201.

Specifically, the connection fixture 201 includes a body 2011 and a reinforcing plate 2012, the reinforcing plate 2012 is perpendicular to the body 2011, and the fastener connects the second battery module 102, the connection fixture 201 and the tray 202 through the reinforcing plate 2012, so that the connection fixture 201 can bear load in the vertical direction, and the weight of the connection fixture 201 is reduced. The reinforcing plate 2012 and the body 2011 may be integrally formed, or may be connected by welding or gluing. The number of reinforcing plates 2012 may be one or more, and a plurality of reinforcing plates 2012 can improve the strength of the connecting fastener.

In one embodiment, the connection fixture 201 may be a plate body having a hollow inside, so that the connection fixture 201 has a certain strength while the weight of the connection fixture 201 can be reduced.

In other embodiments, the connecting fixing member 201 may be a solid plate, so that the bearing capacity of the connecting fixing member 201 is better, and the fastening member penetrating through the connecting fixing member plays a better role in protecting the fastening member, so that the fastening member is not easy to break.

In some embodiments, the second battery module 102 includes a plurality of battery cell assemblies 103 and side plates 105 fixed to opposite sides of each battery cell assembly 103, and the first fasteners 203 fixedly connect the side plates 105 and the connection fixtures 201.

In this way, the second battery module 102 is connected to the connection fixture 201 and the tray 202 via the side plates 105.

Specifically, each cell module 103 includes a plurality of unit cells 104 and two side plates 105 that are sequentially arranged, and the two side plates 105 are fixed on two opposite sides of the cell module 103 along the arrangement direction of the unit cells 104, where the arrangement direction of the unit cells 104 is the left-right direction as shown in fig. 1, and as shown in fig. 9, the cell module is fixedly connected with the connection fixing member 201 through the two side plates 105.

In some embodiments, the side panels 105 comprise square tubes that are hollow inside.

In this way, the weight of the side plate 105 is reduced while the side plate 105 has a certain strength.

Specifically, the side plates 105 are fixedly connected with two side surfaces of the battery module along the arrangement direction of the single battery cells 104, as shown in fig. 2 and 4, the side plates 105 are square tubes with hollow interiors, the side plates 105 are fixedly connected with the bottoms of the two side surfaces of the battery module and are connected with the connecting fixing pieces 201 below through the side plates 105, so that the side plates 105 can be ensured to have higher strength, and the overall weight of the side plates 105 and the battery module after being fixedly connected is lighter.

In some embodiments, the side plate 105 is provided with a first connection hole 106, the connection fixing member 201 is provided with a second connection hole 2013, and the first fastener 203 penetrates the first connection hole 106 and the second connection hole 2013 to fix the connection side plate 105 and the connection fixing member 201.

Therefore, the fastener is matched and connected with the connecting hole, and the processing and the assembly are simpler and more reliable.

Specifically, as shown in fig. 7, 8, 10 and 11, the side plate 105 is provided with a first connection hole 106, the connection fixing member 201 is provided with a second connection hole 2013, in the illustrated embodiment, the connection fixing member 201 is composed of a body 2011 and a plurality of reinforcing plates 2012, the plurality of reinforcing plates 2012 are provided with a plurality of second connection holes 2013 at corresponding positions, and the first fastening member 203 is inserted through the first connection hole 106 and the second connection hole 2013 to fixedly connect the side plate 105 and the connection fixing member 201.

In some embodiments, the fastener further includes a second fastener 204, where the second fastener 204 fixedly connects the side plate 105, the connection fixing member 201, and the tray 202, the side plate 105 is provided with the first connection hole 106, the connection fixing member 201 is provided with the third connection hole 2014, the tray 202 is provided with the fourth connection hole 2022, and the second fastener 204 fixedly connects the second battery module 102, the connection fixing member 201, and the tray 202 through the first connection hole 106, the third connection hole 2014, and the fourth connection hole 2022.

In this way, the second fastener 204 fixedly connects the second battery module 102, the connection fixture 201, and the tray 202 to fix the battery module.

Specifically, the connection fixing member 201 is provided with a third connection hole 2014, the tray 202 is provided with a fourth connection hole 2022, in the illustrated embodiment, the connection fixing member 201 is composed of a body 2011 and a plurality of reinforcing plates 2012, the plurality of reinforcing plates 2012 are provided with a plurality of third connection holes 2014 at corresponding positions, and the second fastening members 204 respectively penetrate through the first connection hole 106, the plurality of third connection holes 2014 and the fourth connection hole 2022 to fix the side plate 105, the connection fixing member 201 and the tray 202 together.

When the first fastening member 203 and the second fastening member 204 are respectively inserted into the second connection holes 2013 and the third connection holes 2014 on the reinforcing plate 2012, the plurality of reinforcing plates 2012 can make the stress of the second fastening member 204 and the first fastening member 203 more uniform, and protect the first fastening member 203 and the second fastening member 204 to a certain extent, and can reduce the weight of the connection fixing member 201.

In some embodiments, the fastener further includes a third fastener 205, the third fastener 205 is configured to fixedly connect the connection fixing member 201 and the tray 202, the connection fixing member 201 is provided with a fifth connection hole 2015, and the third fastener 205 is configured to penetrate through the fifth connection hole 2015 and the fourth connection hole 2022 to fixedly connect the connection fixing member 201 and the tray 202.

In this way, the third fastener 205 reinforces the connection between the connection fixing member 201 and the tray 202, and is connected with the connection hole in a matching manner through the fastener, so that the processing and the assembly are simpler and more reliable.

Specifically, as shown in fig. 3 and 4, the fastener further includes a third fastener 205, and the third fastener 205 is disposed between the two side plates 105 of each cell assembly 103, for fixedly connecting the fixing member 201 and the tray 202. The third fasteners 205 may be uniformly arranged between the two side plates 105 of each cell assembly 103, or the positions of the third fasteners 205 may be designed according to the stress condition of the fasteners in the case 200, as shown in fig. 3.

As shown in fig. 4, 8 and 11, the connection fixing member 201 is provided with a fifth connection hole 2015, the third fastening member 205 penetrates through the fifth connection hole 2015 and the fourth connection hole 2022 to fixedly connect the connection fixing member 201 and the tray 202, in the illustrated embodiment, the connection fixing member 201 includes a plurality of reinforcing plates 2012, the plurality of reinforcing plates 2012 are provided with the fifth connection hole 2015, and the third fastening member 205 penetrates through the plurality of fifth connection holes 2015 sequentially to penetrate through the connection fixing member 201 and penetrate through the fourth connection hole 2022 to fix the connection fixing member 201 and the tray 202. The plurality of reinforcing plates 2012 can make the stress of the third fastening piece 205 more uniform, and play a certain role in protecting the third fastening piece 205.

In the illustrated embodiment, the first, second and third fasteners 203, 204, 205 are bolts, the first, second, third, fourth and fifth connecting holes 106, 2013, 2014, 2022, 2015 are corresponding threaded holes to be matingly secured, in one example, the second fastener 204 is an external hex flange bolt m8×131×1.25, the first fastener 203 is an external hex flange bolt m8×40×1.25, the third fastener 205 is an external hex flange bolt m8×105×1.25, and the locking portion below the third fastener 205 is provided with threads and the non-locking portion above is not threaded to reduce the risk of breakage.

In summary, in the case 200 of the battery pack 100 according to the embodiment of the present utility model, the first battery module 101 is fixedly connected with the tray 202, and according to the stress situation of the battery pack 100 in use, the second fasteners 204 and the first fasteners 203 with different axial lengths are used to fix the two sides and the middle position of the second battery module 102 respectively, so that the fasteners in different positions are stressed uniformly, and then the fixing piece 201 and the tray 202 are fixedly connected through the third fastener 205, so that the second battery module 102 is further reinforced and connected, and the overall structure of the battery panel is stable and reliable.

The battery pack 100 according to the embodiment of the present utility model includes at least two layers of battery modules and the case 200 according to any of the above embodiments.

An electric device according to an embodiment of the present utility model includes the battery pack 100 of the above embodiment.

Above-mentioned battery package 100 and consumer, the battery module of two-layer or more than two-layer through fixed knot constructs to battery package 100 is fixed, can guarantee in the use that the fastener atress on the box 200 is even, guarantees that battery package 100 structure is firm to guarantee the security of consumer.

In particular, the powered device may include an energy storage device, a vehicle, an unmanned aerial vehicle, and the like. Vehicles include, but are not limited to, electric-only vehicles, hybrid vehicles, extended range electric vehicles, and the like.

In the description of the present specification, reference is made to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., meaning that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. The utility model provides a box of battery package, the battery package has two-layer battery module at least, its characterized in that, the battery package includes first battery module and second battery module, first battery module with the second battery module stacks the setting, the second battery module sets up the top of first battery module, the box includes:

the tray is used for fixing the first battery module;

the connecting and fixing piece is used for fixedly connecting the second battery module and the tray;

the fastener comprises a first fastener, and the first fastener is used for fixedly connecting the second battery module and the connecting fixing piece.

2. The case according to claim 1, wherein the tray is provided with a weight-reducing groove.

3. The case according to claim 1, wherein the connection fixture includes a body and a reinforcing plate provided perpendicular to the body, the reinforcing plate being for fixed connection with the second battery module and the tray.

4. The case of claim 1, wherein the second battery module includes a plurality of cell assemblies and side plates fixed to opposite sides of each of the cell assemblies, and the first fastener fixedly connects the side plates and the connection fixture.

5. The cabinet of claim 4, wherein said side panels comprise square tubes that are hollow in the interior.

6. The case of claim 4, wherein the side plate is provided with a first connection hole, the connection fixing member is provided with a second connection hole, and the first fastener penetrates the first connection hole and the second connection hole to fixedly connect the side plate and the connection fixing member.

7. The case of claim 4, wherein the fastener further comprises a second fastener fixedly connecting the side plate, the connection fixture, and the tray, wherein the side plate is provided with a first connection hole, the connection fixture is provided with a third connection hole, the tray is provided with a fourth connection hole, and the second fastener is fixedly connecting the side plate, the connection fixture, and the tray through the first connection hole, the third connection hole, and the fourth connection hole.

8. The case of claim 1, wherein the fastener further comprises a third fastener for fixedly connecting the connection fixture and the tray, the connection fixture is provided with a fifth connection hole, and the third fastener is provided with a fifth connection hole and a fourth connection hole in a penetrating manner to fixedly connect the connection fixture and the tray.

9. A battery pack, comprising:

at least two layers of battery modules; and

the case of any one of claims 1-8.

10. A powered device comprising the battery pack of claim 9.