Battery mounting device and battery pack

Abstract

This application provides a battery mounting device and a battery pack. The battery mounting device includes a mounting body and an airbag. The mounting body forms an inner cavity for accommodating the battery. The airbag is mounted to the mounting body and has a vent communicating with its interior. The vent is configured to communicate with the inner cavity. By providing an airbag on the mounting body and connecting the airbag's vent to the inner cavity where the battery is mounted, the air pressure in the inner cavity is kept stable by the lifting and lowering of the airbag when the air pressure changes. This ensures safety during use and can replace the vent valve, allowing the inner cavity to remain relatively closed to the outside environment, preventing humid air from entering the inner cavity and reducing the possibility of condensation.

Description

Technical Field

[0001] This application relates to the field of power battery technology, specifically to a battery mounting device and a battery pack. Background Technology

[0002] In related technologies, power batteries and energy storage batteries are installed in vehicles or other equipment via battery boxes. These battery boxes often require components such as vent valves to ensure pressure balance inside and outside the battery pack. In actual use, some leakage from the vent valves is unavoidable. When temperature differences between the inside and outside of the battery pack cause pressure inconsistencies, the exchange of humid air between the battery pack and the outside environment leads to condensation inside the battery pack. While some alternative solutions use moisture-absorbing sheets to keep the inside of the battery pack dry, condensation problems still exist during long-term use. Utility Model Content

[0003] The embodiments of this application provide a battery mounting device and a battery pack, which can improve the technical problem of condensation in the internal space of the battery pack.

[0004] In the first aspect, the battery mounting device provided in this application includes:

[0005] The mounting body forms an internal cavity to accommodate the battery;

[0006] The airbag is installed onto the mounting body;

[0007] The airbag is provided with a vent; the vent is connected to the interior of the airbag and is configured to communicate with the inner cavity.

[0008] Using the above scheme, after the battery mounting device and the battery are integrated into a battery pack, the change in air pressure in the inner cavity will cause the volume change of the airbag, so as to use the airbag to balance the change in air pressure in the inner cavity.

[0009] In one embodiment, the mounting body is provided with:

[0010] A receiving cavity for at least a portion of the airbag to be embedded in, so that the airbag is fixedly installed to the mounting body.

[0011] Using the above method, the airbag can be positioned and installed using the receiving cavity, limiting the deformation of the airbag to ensure stable operation.

[0012] In one embodiment, the receiving cavity is configured as a space formed inside the mounting body, such that a portion of the airbag located inside the receiving cavity is disposed outside the inner cavity; the mounting body has a through hole communicating with the receiving cavity; the through hole communicates with the inner cavity.

[0013] By adopting the above scheme, the airbag can adapt to changes in air pressure in the inner cavity and ensure normal operation of the airbag by using through holes, while the airbag occupies little or no space in the inner cavity.

[0014] In one embodiment, the vent is positioned opposite the through hole to communicate with the inner cavity at the through hole.

[0015] By adopting the above solution, when the airbag may deform due to changes in the air pressure inside the cavity, it is ensured that the deformation of the airbag will not prevent the normal communication between the inside of the airbag and the cavity.

[0016] In one embodiment, the mounting body is provided with a plurality of the receiving cavities; the battery mounting device includes a plurality of the airbags; the plurality of airbags are fixedly disposed in different receiving cavities at intervals.

[0017] This setup uses the deformation of multiple airbags to balance changes in the internal pressure, and uses the cavity wall to limit the deformation of a single airbag. When the internal pressure changes, multiple airbags can deform separately, resulting in smaller expansion or compression of a single airbag.

[0018] In one embodiment, the airbag is fixedly disposed on the outside of the mounting body.

[0019] This setup also allows for the use of airbags to adjust the air pressure balance within the cavity without taking up space within the cavity.

[0020] In one embodiment, the mounting body includes:

[0021] The box body has the aforementioned internal cavity formed inside;

[0022] The lid is fixedly mounted on the box body to seal the inner cavity.

[0023] Using the above solution, the box and the cover seal the opening by enclosing each other, thus enclosing the battery inside the cavity.

[0024] In one embodiment, the airbag is fixedly mounted on the housing.

[0025] This design allows the airbag to be positioned away from components such as explosion-proof valves and manifolds, preventing the use of these components from being affected by factors such as airbag deformation.

[0026] A second aspect of this application also provides a battery pack, including a battery and a battery mounting device as described above;

[0027] The battery is disposed within the inner cavity of the battery mounting device.

[0028] In one embodiment, the pre-inflation volume V of the airbag a satisfy:

[0029] V a =[(T E -T L ) / (T H -T L )]V0

[0030] Among them, T E The installation ambient temperature of the battery; T L The minimum operating temperature of the battery; T H V0 represents the maximum operating temperature of the battery; V0 represents the maximum expansion volume of the airbag.

[0031] This design allows the airbag to be used under the most extreme temperature variations.

[0032] In one embodiment, the maximum inflation volume V0 of the airbag satisfies:

[0033] V0>[(2T H -2T L ) / (T H +T L )]V1

[0034] Wherein, V1 is the air volume in the inner cavity.

[0035] This design allows the airbag to adapt to the most extreme temperature variations during use.

[0036] The beneficial effects of the embodiments of this application,

[0037] In the embodiments of this application, by setting an airbag on the mounting body and connecting the airbag's vent to the inner cavity of the battery, the air pressure in the inner cavity is kept stable by the airbag's lifting change when the air pressure in the inner cavity changes. While ensuring safety, this can replace the setting of a vent valve and keep the inner cavity in a closed state relative to the outside world, preventing humid air from the outside environment from entering the inner cavity, thereby reducing the possibility of condensation in the inner cavity. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a perspective view of the battery pack provided in an embodiment of this application;

[0040] Figure 2 yes Figure 1A three-dimensional schematic diagram of some structures in the battery pack shown;

[0041] Figure 3 yes Figure 2 A three-dimensional schematic diagram of the central airbag;

[0042] Figure 4 yes Figure 2 A three-dimensional schematic diagram of the middle box.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Battery mounting device;

[0045] 110. Mounting body; 110a. Inner cavity; 110b. Receiving cavity; 110c. Through hole; 111. Box body; 112. Box cover;

[0046] 120, airbag; 120a, vent;

[0047] 10. Battery pack. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0049] Reference Figures 1 to 4 As shown, the first aspect of this application provides a battery mounting device 100, which can be used to mount a battery so that it can be integrated with the battery to form at least a part of a battery pack 10. It is understood that the battery mentioned in this application can refer to either a single battery cell or a battery module composed of multiple battery cells.

[0050] Reference Figure 1 and Figure 2 As shown, the battery mounting device 100 of this application includes: a mounting body 110 and an airbag 120.

[0051] The mounting body 110 has an inner cavity 110a for accommodating batteries. It can be understood that the mounting body 110 can be considered as the battery box mentioned earlier. However, this does not mean that the structure of the mounting body 110 must be completely identical to the aforementioned battery box, nor that the mounting body 110 must have the same function of installing batteries. Based on actual needs, the structure of the mounting body 110 can be flexibly configured; for example, the aforementioned vent valve may not be necessary on the mounting body 110.

[0052] As a specific plan, refer to Figure 1 As shown, the mounting body 110 includes: a housing 111 and a housing cover 112.

[0053] The inner cavity 110a is formed inside the housing 111. The cover 112 is fixedly disposed on the housing 111 to close the inner cavity 110a. That is, the inner cavity 110a is opened on at least one end face of the housing 111, and the housing 111 and the cover 112 close the opening by enclosing each other, thereby enclosing the battery in the inner cavity 110a.

[0054] Considering the potential condensation problem in the inner cavity 110a when air exchange occurs between the inner cavity 110a and the external environment, referring to Figure 2 and Figure 3 As shown, the battery mounting device 100 provided in this application is equipped with an airbag 120. The airbag 120 is mounted to the mounting body 110, and has a vent 120a that connects to the interior of the airbag 120. This allows gas from the external environment to enter the airbag 120 through the vent 120a, thus connecting the inside and outside of the airbag 120. The vent 120a is configured to communicate with the inner cavity 110a. Therefore, after the battery mounting device 100 and the battery are integrated into the battery pack 10, changes in the air pressure within the inner cavity 110a will cause changes in the volume of the airbag 120. For example, when the air pressure in the inner cavity 110a increases, gas from the inner cavity 110a may enter the airbag 120 through the vent 120a; or when the air pressure in the inner cavity 110a decreases, gas from the airbag 120 may replenish the inner cavity 110a.

[0055] By setting an airbag 120 on the mounting body 110 and connecting the air vent 120a of the airbag 120 to the inner cavity 110a where the battery is installed, the air pressure in the inner cavity 110a is kept stable by the lifting change of the airbag 120 when the air pressure in the inner cavity 110a changes. While ensuring safety of use, it can replace the setting of the vent valve and keep the inner cavity 110a in a closed state relative to the outside world, preventing the humid air in the outside environment from entering the inner cavity 110a, thereby reducing the possibility of condensation in the inner cavity 110a.

[0056] Considering the sealing performance of the main body 110, sealant can be filled between the box 111 and the cover 112 to ensure the sealing effect of the inner cavity 110a, so as to avoid air leakage between the inner cavity 110a and the airbag 120.

[0057] Reference Figure 2 , Figure 3 and Figure 4 As illustrated in the exemplary description of the specific way in which the mounting body 110 and the airbag 120 are combined, in some embodiments, the mounting body 110 is provided with a receiving cavity 110b. The receiving cavity 110b is for at least a portion of the airbag 120 to be embedded, so that the airbag 120 is fixedly mounted to the mounting body 110. That is, the mounting body 110 can be hollowed out, and the airbag 120 is embedded into the receiving cavity 110b. The receiving cavity 110b is used to position and install the airbag 120, limiting the deformation of the airbag 120 to ensure stable operation.

[0058] In the specific design, the receiving cavity 110b is configured as a space formed inside the mounting body 110, so that the portion of the airbag 120 located inside the receiving cavity 110b is disposed outside the inner cavity 110a, i.e., at least a portion of the airbag 120 is isolated outside the inner cavity 110a by the mounting body 110. A through hole 110c is formed on the mounting body 110, communicating with the receiving cavity 110b and the inner cavity 110a. This configuration allows the airbag 120 to adapt to changes in air pressure within the inner cavity 110a using the through hole 110c, ensuring the normal operation of the airbag 120, while minimizing or eliminating the space occupied by the airbag 120 within the inner cavity 110a. This has minimal impact on the spatial layout of other components within the inner cavity 110a, facilitating the integration of components such as the battery and airbag 120 onto the mounting body 110.

[0059] In a more specific design, the vent 120a is aligned with the through hole 110c to communicate with the inner cavity 110a at the through hole 110c. Several feasible solutions exist for this arrangement. For example, the portion of the airbag 120 forming the vent 120a can be located within the receiving cavity 110b, with the vent 120a aligned with the through hole 110c, thus using the through hole 110c to connect the vent 120a and the inner cavity 110a. Alternatively, the portion of the airbag 120 forming the vent 120a can be embedded in or even pass through the through hole 110c, similarly enabling communication between the vent 120a and the inner cavity 110a. This design ensures that the deformation of the airbag 120 will not obstruct normal communication between the interior of the airbag 120 and the inner cavity 110a, even if the airbag 120 may deform due to pressure changes in the inner cavity 110a, thereby ensuring stable operation of the airbag 120.

[0060] The material of the airbag 120 can be flexibly selected as needed. For example, it can be made of plastic or rubber with elastic deformation capability. More specifically, the manufacturing material of the airbag 120 can include polyethylene (PE), polypropylene (PP), polyester (PET) and nylon, or at least one of natural rubber (NR), styrene-butadiene rubber (SBR), butadiene rubber (BR), chloroprene rubber (CR), nitrile rubber (NBR), ethylene propylene rubber (EPM / EPDM), and butyl rubber (IIR). As an example, the PE airbag 120 is very sensitive to changes in air pressure. Using the PE airbag 120 to balance the changes in air pressure in the inner cavity 110a is faster and more effective than traditional ventilator valves.

[0061] The number of airbags 120 can be flexibly configured as needed; for example, only one airbag 120 can be installed on the mounting body 110.

[0062] In some embodiments, refer to Figure 2 and Figure 4 As shown, the mounting body 110 has multiple receiving cavities 110b. Correspondingly, the battery mounting device 100 includes multiple airbags 120. The multiple airbags 120 are fixedly arranged in different receiving cavities 110b at intervals, that is, each airbag 120 is installed in a different receiving cavity 110b. In a specific scheme, one airbag 120 is installed in each receiving cavity 110b. This arrangement uses the deformation of multiple airbags 120 to balance the air pressure changes in the inner cavity 110a, and uses the cavity wall of the receiving cavity 110b to limit the deformation of a single airbag 120. When the air pressure in the inner cavity 110a changes, multiple airbags 120 can deform separately, so the expansion or compression of a single airbag 120 is smaller, which is beneficial to the stable use of the airbag 120. Compared with the scheme of only setting a single airbag 120, the requirements for the deformation and recovery ability of the airbag 120 after deformation are reduced, which can reduce manufacturing costs.

[0063] The airbag 120 may not necessarily be located inside the mounting body 110. In some embodiments, the airbag 120 is fixedly located outside the mounting body 110, that is, the airbag 120 can be fixed to the outer wall of the mounting body 110, and the portion of the airbag 120 forming the vent 120a is connected to the inner cavity 110a through the holes on the mounting body 110. This arrangement can also realize the use of the airbag 120 to adjust the air pressure balance in the inner cavity 110a without occupying the space where the inner cavity 110a is located. This embodiment is not shown in the drawings.

[0064] In the specific plan, refer to Figure 2As shown, the airbag 120 is fixedly mounted on the housing 111. Considering that in actual solutions, the housing cover 112 of the mounting body 110 used as a battery box often needs to reserve installation positions for components such as explosion-proof valves and current collectors, fixing the airbag 120 to the housing 111 can avoid occupying the installation space of these components. That is, the position of the airbag 120 avoids the explosion-proof valve, current collector and other components, and avoids the use of these components being affected by factors such as the deformation of the airbag 120. For example, it can prevent the explosion-proof valve from failing to open in time when the airbag 120 blocks the position of the explosion-proof valve and the air pressure in the inner cavity 110a is too high.

[0065] Based on the inventive concept of this application, and referring to Figure 1 As shown, a second aspect of this application also provides a battery pack 10, including a battery and the battery mounting device 100 as described above; wherein the battery is disposed in the inner cavity 110a of the battery mounting device 100. This battery pack 10 has the beneficial effects of the battery mounting device 100 described above, which will not be elaborated further here.

[0066] The battery is not shown in the accompanying drawings of this application.

[0067] Understandably, the deformation of the airbag 120 and the volume of gas filled in the airbag 120 before use of the battery pack 10 will also affect the performance of the airbag 120. For example, if the maximum expansion volume of the airbag 120 during use is too large, it may cause the airbag 120 to over-inflate, which may cause the explosion-proof valve integrated on the battery pack 10 to open abnormally when the airbag 120 returns to its original shape. On the other hand, if the maximum expansion volume of the airbag 120 is too small, the deformation of the airbag 120 may not be able to adapt to the pressure changes in the inner cavity 110a. Alternatively, if the pre-charge volume of the airbag 120 (i.e., the volume of air pre-filled into the airbag 120 when it is integrated into the battery pack 10) is insufficient or excessive, the anti-condensation effect of the airbag 120 may also be reduced.

[0068] In some embodiments, the pre-inflation volume V of the airbag 120 a satisfy:

[0069] V a =[(T E -T L ) / (T H -T L )]V0

[0070] Among them, T E The battery installation environment temperature refers to the temperature of the external environment in which the battery mounting device 100 and the battery are located during the process of integrating the battery into the inner cavity 110a and fixing the cover 112 to the housing 111 to seal the inner cavity 110a; T L This refers to the minimum operating temperature of the battery; TH V0 represents the maximum operating temperature of the battery; V0 represents the maximum expansion volume of the airbag 120.

[0071] By correlating the pre-charge volume of the airbag 120 with the temperature of the environment in which the battery is located during assembly and use, it ensures that even under the most extreme temperature variation conditions (the battery operates from its lowest operating temperature T), the battery can withstand even the most extreme temperature variations. L Heat up to the maximum operating temperature T H Or the battery is at its highest operating temperature T H Cool down to the lowest operating temperature T L The airbag 120 can also function normally to regulate the air pressure in the inner cavity 110a.

[0072] In some embodiments, the maximum inflation volume V0 of the airbag 120 satisfies:

[0073] V0>[(2T H -2T L ) / (T H +T L )]V1

[0074] Wherein, V1 is the air volume in the inner cavity 110a, that is, the volume of the area in the inner cavity 110a that can hold air after the battery, explosion-proof valve, current collector and other structures are integrated into the battery pack 10 and the inner cavity 110a is sealed.

[0075] By correlating the maximum expansion volume of the airbag 120 with the temperature of the environment in which the battery is located during assembly and use, it ensures that even under the most extreme temperature variation conditions (the battery operates from its lowest operating temperature T), the system can withstand these conditions. L Heat up to the maximum operating temperature T H Or the battery is at its highest operating temperature T H Cool down to the lowest operating temperature T L Even with 120 airbags, they will not over-inflate.

[0076] It is understandable that when the battery mounting device 100 includes a plurality of airbags 120, the aforementioned maximum expansion volume V0 of the airbags 120 and the pre-charge volume V of the airbags 120 are... a It can refer to the sum of the maximum inflation volume or pre-inflation volume of multiple airbags 120.

[0077] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery mounting device, characterized in that, include: The mounting body forms an internal cavity to accommodate the battery; The airbag is installed onto the mounting body; The airbag is provided with a vent; the vent is connected to the interior of the airbag and is configured to communicate with the inner cavity.

2. The battery mounting device according to claim 1, characterized in that, The mounting body is equipped with: A receiving cavity for at least a portion of the airbag to be embedded in, so that the airbag is fixedly installed to the mounting body.

3. The battery mounting device according to claim 2, characterized in that, The receiving cavity is configured as a space formed inside the mounting body, such that the portion of the airbag located inside the receiving cavity is disposed outside the inner cavity; the mounting body has a through hole communicating with the receiving cavity; the through hole communicates with the inner cavity.

4. The battery mounting device according to claim 3, characterized in that, The vent is directly opposite the through hole so as to communicate with the inner cavity at the through hole.

5. The battery mounting device according to claim 2, characterized in that, The mounting body is provided with multiple receiving cavities; the battery mounting device includes multiple airbags; The multiple airbags are fixedly disposed in different receiving cavities at intervals.

6. The battery mounting device according to claim 1, characterized in that, The airbag is fixedly mounted on the outside of the mounting body.

7. The battery mounting device according to any one of claims 1 to 6, characterized in that, The installation body includes: The box body has the aforementioned internal cavity formed inside; The lid is fixedly mounted on the box body to seal the inner cavity.

8. The battery mounting device according to claim 7, characterized in that, The airbag is fixedly mounted on the box body.

9. A battery pack, characterized in that, Includes a battery and a battery mounting device as described in any one of claims 1 to 8; The battery is disposed within the inner cavity of the battery mounting device.

10. The battery pack according to claim 9, characterized in that, The pre-inflation volume V of the airbag a satisfy: V a =[(T E -T L ) / (T H -T L )]V0 Among them, T E The installation ambient temperature of the battery; T L The minimum operating temperature of the battery; T H V0 represents the maximum operating temperature of the battery; V0 represents the maximum expansion volume of the airbag.

11. The battery pack according to claim 10, characterized in that, The maximum expansion volume V0 of the airbag satisfies: V0>[(2T H -2T L ) / (T H +T L )]V1 Wherein, V1 is the air volume in the inner cavity.

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