Battery packs and vehicles

Abstract

This disclosure relates to a battery pack and a vehicle. The battery pack includes a battery housing and a plurality of battery cells. The battery housing includes a tray body and a cover. The plurality of battery cells are arranged in an array to form two battery packs. The two battery packs are connected to the cover and housed in the tray body. A filling space is formed between the two battery packs. The filling space is used to fill the filling space with adhesive to connect the tray body to the cover. Through the above technical solution, the battery pack can improve the overall modal stiffness.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and more particularly to a battery pack and a vehicle. Background Technology

[0002] In related technologies, due to the low modal stiffness of the battery pack as a whole, when the battery pack is subjected to lateral compression or collision, it is easy for the individual battery cells inside the battery pack to experience thermal runaway, which affects the safety of battery use. Utility Model Content

[0003] The purpose of this disclosure is to provide a battery pack and a vehicle that can improve the overall modal stiffness of the battery pack.

[0004] According to a first aspect of the present disclosure, a battery pack is provided, the battery pack including a battery housing and a plurality of battery cells, the battery housing including a tray body and a sealing cover, the plurality of battery cells being arranged in an array to form two battery packs, the two battery packs being connected to the sealing cover and housed in the tray body, a filling space being formed between the two battery packs, the filling space being used to fill adhesive to connect the tray body to the sealing cover.

[0005] Through the above technical solution, in the battery pack provided in this disclosure, the filling space is formed between the two battery packs. Based on this, since the battery packs are connected to the encapsulation cover and housed in the tray body, the adhesive filling the filling space can simultaneously contact the tray body, the encapsulation cover, and the two battery packs. In this way, the adhesive can bond the tray body, the encapsulation cover, and the two battery packs into a whole structure. This allows the gravity of the whole structure or the external force it receives to be directly or indirectly transferred to the encapsulation cover in the whole structure, and the encapsulation cover absorbs and disperses the gravity or external force, which is beneficial to improving the overall modal stiffness of the battery pack.

[0006] In some possible implementations, the battery pack includes connectors, with each of the two battery packs connected to an opposite side of the connector, the two connectors being spaced apart and the space between the two connectors being filled with the adhesive.

[0007] In some possible implementations, at least one of the two connectors is provided with a raised strip that protrudes from one connector toward the other, and a gap is formed between the raised strip and the other connector. In this implementation, the raised strip design increases the surface area of ​​the connector, and the raised strip can be inserted into the adhesive, thereby improving the bonding reliability between the connector and the adhesive.

[0008] In some possible implementations, both connectors are provided with the raised strips, and there are multiple raised strips on the same connector. The multiple raised strips are arranged at intervals along a first direction, and the raised strips on the two connectors are staggered. In this way, the multiple raised strips can further increase the surface area of ​​the connectors, thereby further improving the bonding reliability between the connectors and the adhesive.

[0009] In some possible implementations, the projections of the raised strips on the two connectors overlap in the first direction. This allows the adhesive block to simultaneously engage with the raised strips on both connectors, thereby enhancing the interlocking force between the adhesive block and the connectors, and further improving the reliability of the connection between the adhesive block and the connectors.

[0010] In some possible implementations, the tray body includes a base plate, and at least one of the base plate and the encapsulation cap is provided with a reinforcing beam, the reinforcing beam extending from the base plate or the encapsulation cap into the filling space and contacting the adhesive. In this way, the reinforcing beam can increase the contact area between the base plate or encapsulation cap and the adhesive, thereby improving the adhesive strength between the base plate or encapsulation cap and the adhesive.

[0011] In some possible implementations, the reinforcing beam has opposing first and second surfaces, at least one of which has a groove formed therein, the groove recessing away from the filling space from the first or second surface; or, at least one of the first and second surfaces has a protrusion formed therein, the protrusion projecting towards the filling space from the first or second surface. This design of grooves and protrusions further increases the surface area of ​​the first and second surfaces, thereby improving the reliability of the connection between the reinforcing beam and the adhesive.

[0012] In some possible implementations, the base plate is integrally formed with the reinforcing beam, and / or the encapsulation cover is integrally formed with the reinforcing beam. This ensures the integrity of the base plate or encapsulation cover and the reinforcing beam formed thereon, thereby guaranteeing the reliability of the connection between the base plate or encapsulation cover and the adhesive.

[0013] In some possible implementations, the connector is constructed as a plate and is bonded to the battery pack. This allows for the separate fabrication of the battery pack and the connector, reducing the difficulty of manufacturing the battery pack.

[0014] In some possible implementations, the connector is constructed as a liquid-cooled plate, which is bonded to the battery pack. This allows the battery pack to be cooled via the liquid-cooled plate, thus ensuring its performance.

[0015] According to a second aspect of this disclosure, a vehicle is provided, the vehicle including the aforementioned battery pack.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Other features and advantages of this disclosure will be described in detail in the subsequent detailed description section. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure:

[0018] Figure 1 This is a cross-sectional view of a battery pack provided in an exemplary embodiment of this disclosure;

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the image;

[0020] Figure 3 This is a cross-sectional view of a battery pack provided in yet another exemplary embodiment of this disclosure;

[0021] Figure 4 yes Figure 3 The enlarged view at point B in the image shows the groove.

[0022] Figure 5 This is a cross-sectional view of a battery pack provided in another exemplary embodiment of this disclosure.

[0023] Explanation of reference numerals in the attached figures

[0024] 1. Battery housing; 11. Tray body; 111. Base plate; 12. Encapsulation cover; 2. Connector; 21. Raised strip; 3. Battery cell; 4. Battery pack; 5. Filling space; 6. Reinforcing beam; 61. First surface; 62. Second surface; 71. Groove. Detailed Implementation

[0025] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0026] In this disclosure, unless otherwise stated, directional terms such as "first direction" refer to those specified in the appendix to the instruction manual. Figure 2 , 4Or the direction indicated by L1 in section 5. Furthermore, the terms used in this disclosure, such as "first" and "second," are for distinguishing one element from another and do not have sequential or material significance. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.

[0027] According to a first aspect of the embodiments of this disclosure, reference is made to Figures 1 to 5 As shown, a battery pack is provided, which includes a battery housing 1 and a plurality of battery cells 3. The battery housing 1 includes a tray body 11 and a package cover 12. The plurality of battery cells 3 are arranged in an array to form two battery packs 4. The two battery packs 4 are connected to the package cover 12 and housed in the tray body 11. A filling space 5 is formed between the two battery packs 4. The filling space 5 is used to fill adhesive to connect the tray body 11 to the package cover 12.

[0028] Through the above technical solution, in the battery pack provided in this disclosure, the filling space 5 is formed between the two battery packs 4. Based on this, since the battery pack 4 is connected to the encapsulation cover 12 and is housed in the tray body 11, the adhesive filling the filling space 5 can simultaneously contact the tray body 11, the encapsulation cover 12, and the two battery packs 4. In this way, the adhesive can bond the tray body 11, the encapsulation cover 12, and the two battery packs 4 into an integral structure. This allows the gravity of the integral structure or the external force it receives to be directly or indirectly transmitted to the encapsulation cover 12 in the integral structure, and the encapsulation cover 12 absorbs and disperses the gravity or external force, which is beneficial to improving the overall modal stiffness of the battery pack.

[0029] The "adhesive" can be a structural adhesive or a potting compound, etc. This adhesive not only serves to bond the tray body 11, the encapsulation cover 12, and the battery pack 4, but also reduces heat transfer between the two battery packs 4, thereby improving the safety of the battery pack 4. For example, if thermal runaway occurs on the side of the battery pack 4 connected to the adhesive, the adhesive can reduce the heat transferred from that side to the other side, ensuring the thermal safety of the battery pack 4 on the other side. Furthermore, other types of adhesives can also be used, and this disclosure does not impose specific limitations on them. In addition, when using an adhesive to bond the tray body 11, the encapsulation cover 12, and the battery pack 4, the adhesive can also separate the two battery packs 4, replacing the partition beam between them, which is beneficial for the lightweight design of the battery pack.

[0030] In the battery pack provided in this disclosure, as an exemplary embodiment, reference is made to... Figures 1 to 4As shown, the battery pack includes connectors 2. Two battery packs 4 are connected to opposite sides of each connector 2, with the connectors 2 spaced apart and filled with adhesive. This allows the connectors 2 to be positioned between the battery packs 4 and the filling space 5, directly contacting the adhesive in the filling space 5.

[0031] In the battery pack provided in this disclosure, as an exemplary embodiment, reference is made to... Figures 1 to 4 As shown, at least one of the two connecting members 2 is provided with a protruding strip 21, which protrudes from one of the two connecting members 2 toward the other, and a gap is formed between the protruding strip 21 and the other of the two connecting members 2. The design of the protruding strip 21 increases the surface area of ​​the connecting member 2, thereby increasing the bonding area between the connecting member 2 and the adhesive, and improving the bonding reliability between the connecting member 2 and the adhesive. Furthermore, the gap between the protruding strip 21 and the other of the two connecting members 2 allows the adhesive to flow downwards through the gap under its own gravity to fill the filling space 5.

[0032] The phrase "at least one of the two connecting parts 2 is provided with a raised strip 21" means that one of the two connecting parts 2 is provided with a raised strip 21, or that both connecting parts 2 are provided with raised strips 21. Figures 1 to 4 The example shown is that both connectors 2 are provided with raised strips 21, which does not constitute a limitation of this disclosure.

[0033] In the battery pack provided in this disclosure, as an exemplary embodiment, reference is made to... Figures 1 to 4 As shown, both connectors 2 are provided with raised strips 21, and there are multiple raised strips 21 on the same connector 2. These raised strips 21 are spaced apart along a first direction, and the raised strips 21 on the two connectors 2 are staggered. This allows the multiple raised strips 21 to further increase the surface area of ​​the connectors 2. Furthermore, the multiple raised strips 21 can form a toothed structure on the surface of the connectors 2. Therefore, the surface of the adhesive block formed after the adhesive has cured will also form a toothed structure, providing an interlocking force between the connectors 2 and the adhesive block to prevent them from separating. This further improves the connection reliability between the connectors 2 and the adhesive. The phrase "staggered arrangement of raised strips 21 on the two connectors 2" means that a raised strip 21 arranged on another connector 2 is inserted between two adjacent raised strips 21 on the same connector 2. (Refer to...) Figure 2As shown, taking the left connector 2 forming four protruding strips 21 and the right connector 2 forming three protruding strips 21 as an example, a protruding strip 21 on the right is inserted between two adjacent protruding strips 21 on the left. That is, the protruding strips 21 on the two connectors 2 are arranged alternately. In this way, not only can the adhesion between the adhesive and the two connectors 2 be guaranteed to be equally strong, but the protruding strips 21 on the two connectors 2 can also form a serpentine glue channel, so that the adhesive can flow into the filling space 5 through the glue channel. The serpentine design is conducive to guiding the adhesive to fill the filling space 5.

[0034] In the battery pack provided in this disclosure, as an exemplary embodiment, reference is made to... Figures 1 to 2 As shown, the projected portions of the protrusions 21 on the two connectors 2 overlap in the first direction. This allows the weight of the tray body 11 and the two battery packs 4 to be more reliably transferred to the encapsulation cover 12 via the adhesive bonding between the adhesive and the connectors 2, the tray body 11, the battery packs 4, and the encapsulation cover 12, thereby improving the overall modal stiffness of the battery pack. Furthermore, the design of "the projected portions of the protrusions 21 on the two connectors 2 overlapping in the first direction" allows the adhesive block formed after curing to simultaneously engage with the protrusions 21 on the two connectors 2, thereby enhancing the interlocking force between the adhesive block and the connectors 2. The weight of the tray body 11 and the two battery packs 4 can then be more reliably transferred to the encapsulation cover 12 via the adhesive bonding between the adhesive and the connectors 2, the tray body 11, the battery packs 4, and the encapsulation cover 12.

[0035] In other embodiments, reference is made to Figures 3 to 4 As shown, the projections of the protrusions 21 on the two connectors 2 in the first direction can also be spaced apart from each other, that is, the projections of the protrusions 21 on the two connectors 2 in the first direction do not overlap. In this way, a straight glue-filling channel can be formed between the two connectors 2, which is beneficial for the adhesive to enter the filling space 5 through the straight glue-filling channel. The straight design helps to reduce the flow resistance of the adhesive. In other embodiments, the protrusions 21 on the two connectors 2 can also be arranged in other suitable ways, and this disclosure does not impose specific limitations on them.

[0036] In the battery pack provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 3 As shown, the tray body 11 includes a base plate 111. At least one of the base plate 111 and the encapsulation cover 12 is provided with a reinforcing beam 6. The reinforcing beam 6 extends from the base plate 111 or the encapsulation cover 12 into the filling space 5 and contacts the adhesive. In this way, the reinforcing beam 6 can increase the contact area between the base plate 111 or the encapsulation cover 12 and the adhesive, thereby improving the bonding strength between the base plate 111 or the encapsulation cover 12 and the adhesive.

[0037] The phrase "at least one of the base plate 111 and the encapsulation cover 12 is provided with a reinforcing beam 6" means that the base plate 111 is provided with a reinforcing beam 6, or the encapsulation cover 12 is provided with a reinforcing beam 6, or both the base plate 111 and the encapsulation cover 12 are provided with reinforcing beams 6. Figure 3 The example shown is only of the reinforcing beam 6 provided on the encapsulation cover 12, and does not constitute a limitation of this disclosure.

[0038] In the battery pack provided in this disclosure, as an exemplary embodiment, reference is made to... Figure 4 As shown, the reinforcing beam 6 has opposing first surfaces 61 and second surfaces 62. At least one of the first surfaces 61 and second surfaces 62 has a groove 71 formed therein, recessed from the first surface 61 or second surface 62 away from the connector filling space 5; or, at least one of the first surfaces 61 and second surfaces 62 has a protrusion formed therein, protruding from the first surface 61 or second surface 62 toward the connector filling space 5. Thus, the design of the groove 71 and the protrusion can further increase the surface area of ​​the first surfaces 61 and second surfaces 62, thereby further increasing the bonding strength between the reinforcing beam 6 and the adhesive, and consequently increasing the bonding strength between the corresponding base plate 111 or encapsulation cover 12 and the adhesive. Furthermore, the design of the groove 71 or the protrusion allows the first surfaces 61 and second surfaces 62 to form a toothed structure. Correspondingly, the surface of the adhesive block formed after the adhesive cures will also form a matching toothed structure, so that there is an interlocking force between the reinforcing beam 6 and the adhesive block formed by the adhesive, thus further enhancing the connection reliability between the reinforcing beam 6 and the adhesive block formed by the adhesive.

[0039] In the battery pack provided in this disclosure, as an exemplary embodiment, the base plate 111 is integrally formed with a reinforcing beam 6, and / or the encapsulation cover 12 is integrally formed with a reinforcing beam 6. This ensures the integrity of the base plate 111 or encapsulation cover 12 and the reinforcing beam 6 formed thereon, thereby ensuring the reliability of the connection between the base plate 111 or encapsulation cover 12 and the adhesive. Furthermore, the integral design eliminates the need for the step of connecting the reinforcing beam 6 to the base plate 111 or encapsulation cover 12, thereby improving assembly efficiency.

[0040] In the battery pack provided in this disclosure, as an exemplary embodiment, reference is made to... Figures 1 to 4 As shown, the connector 2 is plate-shaped and is bonded to the battery pack 4. This allows the battery pack 4 and the connector 2 to be manufactured separately, reducing the manufacturing difficulty of the battery pack 4.

[0041] In the battery pack provided in this disclosure, as an exemplary embodiment, the connector 2 is constructed as a liquid cooling plate, which is bonded to the battery pack 4. This allows the liquid cooling plate to cool the battery pack 4, ensuring its performance. The battery pack 4 includes multiple battery cells 3 and multiple side cooling plates, which are arranged parallel to each other, with multiple battery cells 3 arranged between any two adjacent side cooling plates. In this embodiment, the multiple side cooling plates can be arranged perpendicular to the liquid cooling plate and connected to it. Alternatively, the liquid cooling plate can be constructed as the outermost side cooling plate of the battery pack 4. This disclosure does not impose specific limitations in this regard.

[0042] According to a second aspect of this disclosure, a vehicle is provided, the vehicle including the aforementioned battery pack.

[0043] In the battery pack provided in this disclosure, adhesive can be injected into the filling space 5 before the encapsulation cover 12 is installed on the battery pack, and then the encapsulation cover 12 can be installed. Alternatively, adhesive can be injected into the filling space 5 through the injection hole provided on the encapsulation cover 12 after the encapsulation cover 12 is assembled. This disclosure does not impose any specific limitations on this.

[0044] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0045] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A battery pack, characterized by, The battery pack includes a battery housing and multiple battery cells. The battery housing includes a tray body and a cover. The multiple battery cells are arranged in an array to form two battery packs. The two battery packs are connected to the cover and housed in the tray body. A filling space is formed between the two battery packs. The filling space is used to fill adhesive to connect the tray body to the cover.

2. The battery pack of claim 1, wherein, The battery pack includes connectors, with each of the two battery packs connected to a connector on an opposite side, the two connectors being spaced apart and filled with adhesive between them.

3. The battery pack of claim 2, wherein, At least one of the two connecting members is provided with a protruding strip that protrudes from one of the two connecting members toward the other, and a gap is formed between the protruding strip and the other of the two connecting members.

4. The battery pack of claim 3, wherein, Both of the connecting members are provided with the protruding strips, and there are multiple protruding strips on the same connecting member. The multiple protruding strips are arranged at intervals along the first direction, and the protruding strips on the two connecting members are staggered.

5. The battery pack of claim 4, wherein, The projections of the protrusions on the two connecting members overlap in the first direction.

6. The battery pack of any one of claims 1-5, wherein, The tray body includes a base plate, and at least one of the base plate and the encapsulation cover is provided with a reinforcing beam. The reinforcing beam extends from the base plate or the encapsulation cover into the filling space and contacts the adhesive.

7. The battery pack of claim 6, wherein, The reinforcing beam has opposing first and second surfaces, at least one of the first and second surfaces having a groove formed therein, the groove being recessed from the first or second surface away from the filling space; or, At least one of the first surface and the second surface is formed with a protrusion that protrudes from the first surface or the second surface toward the filling space.

8. The battery pack of claim 6, wherein, The base plate is integrally formed with the reinforcing beam, and / or the encapsulation cover is integrally formed with the reinforcing beam.

9. The battery pack of claim 2, wherein, The connector is plate-shaped and is bonded to the battery pack.

10. The battery pack of claim 2, wherein, The connector is constructed as a liquid cooling plate, which is bonded to the battery pack.

11. A vehicle characterized by comprising: The vehicle includes the battery pack according to any one of claims 1-10.

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