CN113224452B - Battery pack - Google Patents
Battery pack Download PDFInfo
- Publication number
- CN113224452B CN113224452B CN202110323268.9A CN202110323268A CN113224452B CN 113224452 B CN113224452 B CN 113224452B CN 202110323268 A CN202110323268 A CN 202110323268A CN 113224452 B CN113224452 B CN 113224452B
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- CN
- China
- Prior art keywords
- upper cover
- connecting piece
- battery
- battery pack
- battery module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application relates to the technical field of energy storage devices, in particular to a battery pack which comprises a box body, a battery module and an upper cover, wherein the battery module is accommodated in the box body, the upper cover seals the battery module in the box body, and a fixed connecting part is arranged in the middle of the upper cover; the battery pack further comprises a first connecting piece, and the first connecting piece connects the fixed connecting part to the battery module; or, the first connecting piece connects the fixed connecting part to the box body. In the battery package that this application provided, the fixed connection portion of the middle part of upper cover is fixed back with battery module or box, and the middle part of upper cover just can not take place rocking by a wide margin again. Therefore, the problem of scratching the battery module is avoided, abnormal sound is eliminated, and the safety performance of the battery pack is improved.
Description
Technical Field
This application energy memory technical field especially relates to a battery package.
Background
The secondary battery is a power source of new energy vehicles as a rechargeable battery module, and is widely applied in the field of new energy vehicles.
The battery package among the prior art includes battery module, box and upper cover, and the battery module holds in the box, and the top at the box is fixed to the upper cover to seal the battery module in the box.
In the prior art, the upper cover is easy to shake, so that the quality problem of the battery pack is caused.
Disclosure of Invention
In view of this, the present application provides a battery pack to solve the technical problem that the upper cover is easy to shake in the prior art.
The application provides a battery pack, including box, battery module and upper cover, the battery module hold in the box, the upper cover will the battery module seal in the box, wherein:
the middle part of the upper cover is provided with a fixed connecting part;
the battery pack further comprises a first connecting piece, and the first connecting piece connects the fixed connecting part to the battery module; or the first connecting piece connects the fixed connecting part to the box body.
In one possible embodiment, the battery pack further includes a second connector;
the battery module comprises end plates, side plates and battery units, wherein the end plates and the side plates are respectively connected to the battery units;
the second connecting piece connects the end plates of the adjacent battery modules; or the second connecting piece is used for connecting the side plates of the adjacent battery modules;
the first connecting piece connects the fixed connecting part to the second connecting piece.
In one possible embodiment, the second connector includes a bracket body and a boss connected to the bracket body;
the boss is provided with a connecting hole;
the first connecting piece is a bolt;
the first connecting piece is connected to the connecting hole.
In one possible embodiment, the battery pack further comprises a sealing member;
the sealing member is connected between the upper cover and the second connecting member in a sealing manner.
In a possible embodiment, the boss is provided with a groove, and the groove surrounds the connecting hole;
the seal is received in the groove.
In one possible embodiment, the material of the sealing element is a plastic material.
In a possible embodiment, the second connector further comprises a reinforcing rib connected to the boss and the bracket body.
In one possible embodiment, the second connector is connected to the top of the end plate.
In a possible embodiment, the fixed connection part is a part of the upper cover and is located at a central position of the upper cover.
In a possible embodiment, a spacer is arranged between the first connecting element and the fixed connection.
In the battery package that this application provided, the fixed connection portion of the middle part of upper cover and battery module or the fixed back of box, the middle part of upper cover just can not take place rocking by a wide margin again. Therefore, the problem of scratching the battery module is avoided, abnormal sound is eliminated, and the safety performance of the battery pack is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;
fig. 2 is a top view of a battery pack provided in an embodiment of the present application;
FIG. 3 isbase:Sub>A sectional view taken along line A-A in FIG. 2;
FIG. 4 is an enlarged view of FIG. 3 at B;
fig. 5 is a schematic structural diagram of a second connecting member in a battery pack according to an embodiment of the present disclosure;
fig. 6 is a top view of a second connector in a battery pack provided in an embodiment of the present application;
fig. 7 is a sectional view taken along line E-E in fig. 6.
Reference numerals:
1-a box body;
2-a battery module;
21-an end plate;
3, covering the cover;
31-a fixed connection;
4-a first connector;
5-a second connector;
51-a stent body;
52-boss;
521-a connection hole;
522-groove
53-reinforcing ribs;
6-a seal;
7-a gasket.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element through intervening elements.
Current battery package includes battery module, box and upper cover, and the battery module holds in the box, and the upper cover is fixed on the box. When the battery pack is installed on electric equipment, for example, a new energy automobile, vibration may occur along with the operation of the new energy automobile. The fixed point of upper cover and box is usually located the upper cover peripheral position, and this can lead to the middle part of upper cover to appear rocking by a wide margin, takes place to last the collision with battery module's high pressure and low pressure part. The long-time repeated collision can lead to the upper cover damaged, can scratch battery module's high pressure even and connect protector and low pressure pencil, also can produce the abnormal sound, leads to the emergence of safety problem. In addition, the upper part of the battery module is weak in the ability of resisting vibration in the horizontal direction, the first-order modal frequency is lower, the resonance condition is not easy to avoid, and the mechanical performance is poor.
In view of this, the present disclosure provides a battery pack, which can increase a first-order modal frequency of the battery pack and avoid vibration of a structure of the battery pack.
As shown in fig. 1 to 3, the battery pack provided by the embodiment of the present application includes a case 1, a battery module 2 and an upper cover 3, wherein the battery module 2 is accommodated in the case 1, and the upper cover 3 encloses the battery module 2 in the case 1.
The middle part of the upper cover 3 is provided with a fixed connecting part 31, the battery pack further comprises a first connecting piece 4, and the first connecting piece 4 connects the fixed connecting part 31 to the battery module 2; alternatively, the first connector 4 connects the fixed connection 31 to the case 1.
In the battery pack provided by the embodiment of the application, after the fixing connection part 31 in the middle of the upper cover 3 is fixed with the battery module 2 or the box body 1, the middle of the upper cover 3 cannot shake greatly. Therefore, the problem that the upper cover 3 scratches the battery module 2 is avoided, abnormal sound is eliminated, and the safety performance of the battery pack is improved.
The fixing portion 31 may be a part of a plate member of the upper cover 3, or may be a separate member attached to the middle portion of the upper cover 3. The first connector 4 may fix the fixing connection portion 31 to the case 1, or may connect the fixing connection portion 31 to the battery module 2 so that the middle portion of the upper cover 3 is stably fixed.
It will be understood by those skilled in the art that other positions of the connecting member between the upper cover 3 and the box body 1 may be provided, for example, the periphery of the upper cover 3 is fixedly connected to the box body 1 by screws or rivets, so as to further improve the stability of the upper cover 3.
In a specific embodiment, as shown in fig. 4, the battery pack further includes a second connector 5. The battery module 2 includes end plates 21, side plates, and battery cells, and the end plates 21 and the side plates are connected to the battery cells, respectively. Specifically, the battery cell may be plural, and the plural battery cells are stacked and fixed by the side plates and the end plates 21 to form the battery module 2.
The second connecting member 5 connects the end plates 21 of the adjacent battery modules 2. Or, the second connecting member 5 connects the side plates of the adjacent battery modules 2. In the embodiment shown in fig. 4, the second connecting member 5 is connected to the end plate 21. The first link 4 connects the fixing connection portion 31 of the upper cover 3 to the second link 5.
In the above embodiment, the second connecting member 5 may be plural according to the number of the battery modules 2, and the first connecting member 4 may be connected only to the second connecting member 5 corresponding to the middle portion of the upper cover 3.
The other second connecting members 5 connect the adjacent battery modules 2 so that the plurality of battery modules 2 are connected as a whole. Thus, the battery module 2 is less likely to move within the case 1 when the battery pack vibrates. The second connecting member 5 is fixed to the end plate 21 or the side plate, and the second connecting member 5 is closer to the middle portion of the upper cover 3 in the height direction of the case 1 than to the case 1, so that the first connecting member 4 can be more easily connected to the battery module 2 through the second connecting member 5, simplifying the assembly process. Of course, the second connecting member 5 may be disposed at other positions of the housing 1, connected to the first connecting member 4 through a transfer member, or directly connected to the first connecting member 4.
In a specific embodiment, as shown in fig. 5 to 7, the second connector 5 includes a bracket body 51 and a boss 52 connected to the bracket body 51. The bracket body 51 may be formed by die-casting or machining an aluminum alloy, and the boss 52 may be connected to the bracket body 51 or may be integrally formed with the bracket body 51.
The holder body 51 may be a substantially rectangular block-shaped structure so as to be able to be sized to meet the requirement of simultaneously connecting the adjacent battery modules 2. The boss 52 is of a generally frustoconical configuration to facilitate machining.
The boss 52 is provided with a coupling hole 521, the coupling hole 521 may be a threaded hole, the first coupling member 4 is a bolt, and the first coupling member 4 is coupled to the coupling hole 521. Specifically, the first connecting member 4 is connected to the connecting hole 521 after passing through the middle portion of the upper cover 3.
The bracket body 51 may also be provided with through-holes in which bolts or other connectors are provided to connect the bracket body 51 to the end plates 21 or side plates of the battery module 2.
The second connecting member 5 has the advantage of simple structure, is small in size, does not occupy the installation space of the battery module 2 too much, and is favorable for improving the energy density of the battery pack.
In a specific embodiment, the battery pack further includes a sealing member 6, and the sealing member 6 is sealingly coupled between the upper cover 3 and the second coupling member 5. The sealing element 6 may be embodied as a sealing ring with a certain compression ratio.
In a specific embodiment, as shown with reference to fig. 7, the boss 52 is provided with a groove 522, the groove 522 surrounds the connection hole 521, and the sealing member 6 is received in the groove 522. As shown in fig. 5, the top surface C of the sealing member 6 is preferably higher than the upper surface D of the boss 52, and the height difference distance between the surface C and the surface D is within the effective compression distance range of the sealing member 6, so as to ensure that the upper cover 3 is effectively sealed after the first connecting member 4 is fastened.
It will be appreciated that the seal 6 may be attached directly to the outer surface of the boss 52. However, providing the groove 522 on the boss 52 and trapping the sealing member 6 in the groove 522 can further reduce the space occupied by the sealing member 6 in the battery pack, and contributes to an increase in the energy density of the battery pack.
In a specific embodiment, the material of the sealing member 6 is a plastic material capable of plastically deforming the object, such as rubber, so that the sealing performance of the sealing member 6 is good. In this embodiment, the sealing requirements of IP67 or more can be satisfied between the battery packs.
In a specific embodiment, the second connector 5 further comprises a reinforcing rib 53, and the reinforcing rib 53 is connected to the boss 52 and the holder body 51. For the lengthened battery pack, the overall size of the upper cover 3 is large, the second connecting piece 5 needs to bear certain weight, and the reinforcing ribs 53 are arranged to play a role in reinforcing, so that the upper cover 3 can be more stable and reliable after the middle part of the upper cover 3 is connected and fixed through the first connecting piece 4 and the second connecting piece 5.
In a particular embodiment, the second connector 5 is connected to the top of the end plate 21. As shown in fig. 4, the second connector 5 may be attached to the top of the end plate 21 by screws. Because battery module 2 can be fixed in box 1 through the bottom, rethread second connecting piece 5 can prevent battery module 2's removal effectively after battery module 2 leans on the position on upper portion to fix adjacent battery module 2, and a plurality of battery modules 2 are connected and are formed a rigidity wholly, and battery module 2 takes place to remove when having avoided the battery package vibration.
Of course, the second connecting member 5 may be attached to the top of the side plate by screws.
It should be noted that, the box body 1 can be provided with the multilayer battery module 2, and for each layer of battery module 2, the second connecting member 5 can be arranged on the upper portion of the battery module 2, so that the multilayer battery module 2 is not easy to move.
In a specific embodiment, the fixing connection portion 31 is a part of the upper cover 3 and is located at a central position of the upper cover 3. The center position here refers to the center point of the geometry of the upper cover 3. Such as the center of a circle, the intersection of the diagonals of a rectangle, etc. The fixed connection portion 31 may be expanded outward by a certain area centering on the center point as long as it can be engaged with the first connecting member 4. The connection point of the first connecting element 4 to the fixed connection 31 is located in this central position. Therefore, the first-order modal frequency of the battery pack can be effectively improved, and the upper cover 3 of the battery pack is prevented from shaking.
In a particular embodiment, a spacer 7 is arranged between the first connecting piece 4 and the fixed connection 31. The gasket 7 can prevent the first connecting piece 4 from crushing or scratching the upper cover 3, and the deformation of the gasket 7 can ensure that the first connecting piece 4 is more tightly connected with the upper cover 3 and is not easy to loosen.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (6)
1. The utility model provides a battery pack, includes box, battery module and upper cover, the battery module hold in the box, the upper cover will the battery module seal in the box, its characterized in that:
the middle part of the upper cover is provided with a fixed connecting part;
the battery pack further comprises a first connecting piece, and the first connecting piece connects the fixed connecting part to the battery module;
the battery pack further comprises a second connecting piece, and the second connecting piece is used for connecting the adjacent battery modules;
the second connecting piece comprises a bracket body and a boss connected to the bracket body;
the boss is provided with a connecting hole;
the first connecting piece is a bolt;
the first connecting piece is connected to the connecting hole;
the battery pack further includes a sealing member;
the sealing element is connected between the upper cover and the second connecting piece in a sealing mode;
the lug boss is provided with a groove, and the groove surrounds the connecting hole;
the sealing element is accommodated in the groove;
the second connecting piece still includes the strengthening rib, the strengthening rib connect in the boss with the support body, it is a plurality of the strengthening rib sets up week side of boss.
2. The battery pack according to claim 1, wherein the battery module includes end plates, side plates, and battery cells, the end plates and the side plates being connected to the battery cells, respectively;
the second connecting piece connects the end plates of the adjacent battery modules; or the second connecting piece is used for connecting the side plates of the adjacent battery modules;
the first connecting piece connects the fixed connecting part to the second connecting piece.
3. The battery pack of claim 1, wherein the sealing member is made of a plastic material.
4. The battery pack of claim 2, wherein the second connector is connected to a top of the end plate.
5. The battery pack according to any one of claims 1 to 4, wherein the fixing connection part is a part of the upper cover and is located at a central position of the upper cover.
6. The battery pack according to any one of claims 1 to 4, wherein a gasket is provided between the first connecting member and the fixed connecting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110323268.9A CN113224452B (en) | 2021-03-26 | 2021-03-26 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110323268.9A CN113224452B (en) | 2021-03-26 | 2021-03-26 | Battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN113224452A CN113224452A (en) | 2021-08-06 |
| CN113224452B true CN113224452B (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110323268.9A Active CN113224452B (en) | 2021-03-26 | 2021-03-26 | Battery pack |
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| CN113224452A (en) | 2021-08-06 |
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Address after: Room 201-1, Comprehensive Building 5#, No. 11, Butang Middle Road, Torch High-tech Zone (Tongxiang) Industrial Base, Xiamen City, Fujian Province, 361006 Applicant after: Xiamen Haichen Energy Storage Technology Co.,Ltd. Address before: 361101 Room 201-1, Comprehensive Building 5#, No. 11, Butang Middle Road, Torch High-tech Zone (Tongxiang) Industrial Base, Xiamen City, Fujian Province Applicant before: Xiamen Haichen New Energy Technology Co.,Ltd. |
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