Battery shell, battery pack and electric equipment

Abstract

The utility model discloses a battery shell, a battery pack and electric equipment. The battery shell comprises an upper cover and a lower cover, a bottom plate; the upper cover is arranged on the bottom plate in a covering manner; the battery module comprises a bottom plate and a cover plate, the side, away from the battery module, of the cover plate is connected with the bottom plate, a containing cavity is formed between the cover plate and the upper cover, the containing cavity is used for arranging the battery module, a liquid cooling cavity is formed between the cover plate and the bottom plate, and a liquid cooling working medium circulates in the liquid cooling cavity. Wherein the liquid cooling cavity for circulating the liquid cooling working medium is formed between the cover plate and the bottom plate, the heat of the battery module is taken away through the circulation of the liquid cooling working medium, the space of the bottom plate in the battery pack is fully utilized, the integration degree is high, and the space utilization rate is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery housing, a battery pack and an electrical equipment. Background Art

[0002] The battery pack system mainly includes a battery pack upper cover, a battery pack bottom plate, the batteries and modules of the battery pack, high and low voltage lines and a control system, a battery pack liquid cooling system and a heat conduction system, etc. The complete liquid cooling system includes components such as a battery cooler, an electronic expansion valve, an electronic water pump, a battery valve and a liquid cooling plate; among them, the liquid cooling plate realizes the cooling function by the flow of the liquid cooling working medium in the channel to transfer the excess heat, and is a key component of the liquid cooling system.

[0003] When the battery works, it generates excess heat, and the heat is transferred by the contact between the battery or the module and the surface of the liquid cooling plate, and finally is taken away by the liquid cooling working medium flowing through the internal flow channel of the liquid cooling plate. The general requirements for the liquid cooling plate are large heat dissipation power, which can timely export the excess heat generated during the working process of the power battery and avoid the occurrence of excessive temperature rise.

[0004] In the liquid cooling scheme adopted by the electric vehicle power battery, the liquid cooling plate is installed on the new energy vehicle as a separate part, which will occupy more space, increase the cost, and is not conducive to the development requirements of the lightweight of new energy vehicles. Content of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a battery housing, in which a liquid cooling cavity for circulating the liquid cooling working medium is formed between a cover plate and an upper cover. The heat of the battery module is taken away by the circulation of the liquid cooling working medium, making full use of the space of the upper cover inside the battery pack, with high integration and higher space utilization rate.

[0006] The utility model further provides a battery pack.

[0007] The utility model further provides an electrical equipment.

[0008] The battery housing according to the first aspect embodiment of the utility model includes: a bottom plate; an upper cover, the upper cover is covered on the bottom plate; a cover plate, a receiving cavity is formed between the cover plate and the bottom plate, the receiving cavity is used for arranging a battery module, the cover plate is connected to the upper cover to form a liquid cooling cavity between the cover plate and the upper cover, and a liquid cooling working medium circulates in the liquid cooling cavity.

[0009] According to some embodiments of the utility model, the upper cover includes: a bottom wall and an annular side wall, the annular side wall is connected to the periphery of the bottom wall, the annular side wall is provided with a clamping portion, the clamping portion is annularly arranged on the annular side wall, and the cover plate is clamped with the clamping portion.

[0010] According to some embodiments of the present utility model, the clamping portion is a groove.

[0011] According to some embodiments of the present utility model, a liquid inlet and a liquid outlet are provided on the annular side wall, and the liquid cooling cavity communicates with the liquid inlet and the liquid outlet.

[0012] According to some embodiments of the present utility model, the battery housing further includes: a first sealing member, and the first sealing member is clamped between the cover plate and the clamping portion.

[0013] According to some embodiments of the present utility model, the battery housing further includes: a second sealing member, and the second sealing member is disposed between the first sealing member and the clamping portion.

[0014] According to some embodiments of the present utility model, the battery housing further includes: a first heat conducting layer, and the first heat conducting layer is disposed between the cover plate and the battery module for realizing heat transfer between the battery module and the cover plate.

[0015] According to some embodiments of the present utility model, a plurality of spaced baffles are provided on the bottom plate, the baffles extend along the height direction of the battery housing, and a plurality of mutually enclosed liquid cooling cavities are formed between the cover plate and the plurality of baffles.

[0016] The battery pack according to the second aspect embodiment of the present utility model includes: the battery housing; and a battery module, and the battery module is disposed in the accommodating cavity.

[0017] The electrical equipment according to the third aspect embodiment of the present utility model includes: the battery pack.

[0018] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is the overall structural schematic diagram of the battery pack according to the embodiment of the present utility model;

[0021] Figure 2 is the partial schematic diagram of the battery pack according to the embodiment of the present utility model.

[0022] Reference Signs:

[0023] 10. Battery pack; 11. Bottom plate; 12. Upper cover; 121. Bottom wall; 122. Annular side wall; 123. Clamping portion; 13. Cover plate; 14. Battery module; 15. First heat conducting layer; 16. Liquid cooling cavity; 17. First seal. Detailed implementation manners

[0024] The embodiments of the present utility model will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model will be described in detail below.

[0025] Below, reference is made to Figure 1 - Figure 2 Describe the battery housing according to the embodiments of the present utility model. A battery pack 10 including the above battery housing is further proposed, and an electrical device including the above battery pack 10 is further proposed.

[0026] Wherein, Figure 1 - Figure 2 The up-down direction therein is the height direction.

[0027] As Figure 1 shown, the battery housing includes: a bottom plate 11, an upper cover 12 and a cover plate 13. The upper cover 12 is covered on the bottom plate 11. An accommodation cavity is formed between the cover plate 13 and the bottom plate 11, and the accommodation cavity is used to arrange the battery module 14. Specifically, the upper cover 12 is fixedly connected to the bottom plate 11 to form the appearance of the battery pack 10. An installation space is formed between the upper cover 12 and the bottom plate 11, and both the cover plate 13 and the battery module 14 are arranged in the installation space. An accommodation cavity is formed between the cover plate 13 and the bottom plate 11, and the battery module 14 is arranged in the accommodation cavity.

[0028] Further, the lower side of the battery module 14 is fixedly connected to the bottom plate 11, and an adhesive is arranged between the battery module 14 and the bottom plate 11 to fixedly connect the battery module 14 to the bottom plate 11. The adhesive can be a thermally conductive adhesive, which guides part of the heat of the battery module 14 to the bottom plate 11 and dissipates it to the outside through the bottom plate 11, improving the heat dissipation efficiency of the battery pack 10.

[0029] Moreover, the upper cover 12 and the bottom plate 11 are connected by means including but not limited to riveting, screws, gluing, riveting + gluing or screws + gluing. In actual use, the connection method is set according to needs and will not be elaborated one by one here.

[0030] The cover plate 13 is connected to the upper cover 12, and a liquid cooling cavity 16 is formed between the cover plate 13 and the upper cover 12, and a liquid cooling working medium flows in the liquid cooling cavity 16. Specifically, the cover plate 13 is disposed in the installation space, the cover plate 13 is disposed between the battery module 14 and the upper cover 12, and one side of the cover plate 13 facing away from the battery module 14 is connected to the upper cover 12, so as to form a hollow structure between the cover plate 13 and the upper cover 12, that is, a liquid cooling cavity 16 is formed between the cover plate 13 and the upper cover 12, and a liquid cooling working medium can flow in the liquid cooling cavity 16, and the heat of the battery module 14 is taken away through the flow of the liquid cooling working medium. The liquid cooling working medium reciprocally flows in the liquid cooling cavity 16 to achieve the purpose of regulating the temperature of the battery pack 10. Integrating the liquid cooling cavity 16 inside the upper cover 12 of the battery pack 10 makes the structure more integrated and the space utilization rate higher.

[0031] Wherein, the upper cover 12 is made of a metal material to ensure the strength of the top of the battery housing and ensure the structural strength of the liquid cooling cavity 16 formed between the upper cover 12 and the cover plate 13 through which the liquid cooling working medium flows.

[0032] In the related art, the liquid cooling plate is formed by sealing an upper cooling plate and a lower cooling plate to form a channel for the liquid cooling working medium. In the present utility model, under the condition that the space and function remain unchanged, the cover plate 13 and the upper cover 12 replace the separate liquid cooling plate in the prior art, reducing the lower cooling plate, saving the cost of the lower cooling plate, and improving the volume utilization rate of the battery pack 10.

[0033] Combined Figure 1 and Figure 2 As shown, the upper cover 12 includes: a bottom wall 121 and an annular side wall 122. The annular side wall 122 is connected to the peripheral side of the bottom wall 121. The annular side wall 122 is provided with a clamping portion 123. The clamping portion 123 is annularly arranged on the annular side wall 122, and the cover plate 13 is clamped with the clamping portion 123. Specifically, the upper end surface of the annular side wall 122 is fixedly connected to the bottom plate 11. The annular side wall 122 and the bottom plate 11 are connected by means including but not limited to riveting, screws, gluing, riveting + gluing or screws + gluing. In actual use, the connection method is set according to needs and will not be elaborated here one by one. The lower end of the annular side wall 122 is connected to the peripheral side of the bottom wall 121, and the upper surface of the annular side wall 122 is connected to the cover plate 13 to form a sealed liquid cooling cavity 16 between the cover plate 13 and the upper cover 12.

[0034] Specifically, a clamping portion 123 is provided on the inner side of the annular side wall 122. The clamping portion 123 is annularly arranged around the side wall. The cover plate 13 and the clamping portion 123 are clamped and connected to fix the cover plate 13 on the inner circumference of the annular side wall 122, so as to form a liquid cooling cavity 16 through which the liquid cooling working medium flows between the cover plate 13 and the upper cover 12.

[0035] In some embodiments, the clamping portion 123 is a groove. That is to say, the clamping portion 123 can be a groove, which is recessed inward to form an annular groove. The outer peripheral side of the cover plate 13 is clamped with the groove to fix the cover plate 13 on the upper cover 12, so as to form a liquid cooling cavity 16 for circulating the liquid cooling working medium between the cover plate 13 and the upper cover 12.

[0036] Furthermore, a liquid inlet and a liquid outlet are provided on the annular side wall 122, and the liquid cooling cavity 16 communicates with the liquid inlet and the liquid outlet. Specifically, the liquid cooling working medium in the liquid cooling cavity 16 enters through the liquid inlet and exits through the liquid outlet, so as to realize the circulating flow of the liquid cooling working medium in the liquid cooling cavity 16.

[0037] In some other embodiments, there can be multiple liquid cooling cavities 16, and the multiple liquid cooling cavities 16 are arranged at intervals and respectively correspond to the positions where multiple battery cells are located, so as to ensure the cooling effect on the battery cells. The liquid inlets can be multiple, and the liquid outlets can be multiple. The multiple liquid inlets and the multiple liquid outlets correspond to each other one by one, and the multiple liquid inlets and the multiple liquid outlets are respectively communicated with the multiple liquid cooling cavities 16.

[0038] As Figure 2 shown, the battery housing further includes: a first seal 17, and the first seal 17 is clamped between the cover plate 13 and the clamping portion 123. Specifically, the outer peripheral side of the first seal 17 is fixedly connected to the clamping portion 123, and the inner peripheral side of the first seal 17 abuts against the cover plate 13. The first seal 17 is arranged between the cover plate 13 and the clamping portion 123. On the basis of the clamping connection between the cover plate 13 and the clamping portion 123, the first seal 17 is further arranged between the cover plate 13 and the clamping portion 123 to ensure the sealing performance between the cover plate 13 and the upper cover 12.

[0039] Furthermore, the battery housing further includes: a second seal, and the second seal is arranged between the first seal 17 and the cover plate 13. The second seal includes but is not limited to sealant or structural adhesive. On the basis of the first seal 17, sealant or structural adhesive is coated to further improve the sealing performance between the cover plate 13 and the upper cover 12.

[0040] As Figure 1 and Figure 2 shown, the battery housing further includes: a first heat conducting layer 15, and the first heat conducting layer 15 is arranged between the cover plate 13 and the battery module 14 for realizing heat transfer between the battery module 14 and the cover plate 13. Specifically, the first heat conducting layer 15 is arranged on the side where the cover plate 13 abuts against the battery module 14. The cover plate 13 uniformly exchanges the heat of the liquid cooling working medium and the battery module 14 to realize heat exchange, so as to achieve the purpose of controlling the temperature of the battery module 14.

[0041] In some other embodiments, the battery housing further includes: a second heat conducting layer disposed between the battery module 14 and the bottom plate 11 for achieving heat transfer between the battery module 14 and the bottom plate 11, so that part of the heat of the battery module 14 is dissipated to the outside through the bottom plate 11, thereby improving the heat dissipation efficiency of the battery module 14.

[0042] In some other embodiments, a plurality of spaced baffles are provided on the bottom plate 11. The baffles extend along the height direction of the battery housing. A plurality of mutually enclosed liquid cooling cavities 16 are formed between the cover plate 13 and the plurality of baffles. Specifically, the upper surface of the baffle is fixedly connected to the bottom wall 121. The baffle extends upward along the height direction of the battery housing. When the cover plate 13 is snap-connected to the upper cover 12, the lower surface of the baffle abuts against the cover plate 13, and a plurality of liquid cooling cavities 16 are formed between the cover plate 13 and the baffle. The plurality of liquid cooling cavities 16 are separated from each other. The plurality of liquid cooling cavities 16 can be communicated with each other or not communicated with each other. Liquid cooling working media flow through the plurality of liquid cooling cavities 16 respectively. The liquid cooling working media and the battery module 14 perform heat pipe exchange through the cover plate 13 to adjust the temperature of the battery module 14.

[0043] In some embodiments, the cover plate 13 and the baffle can be directly adhered together by compaction and riveting, which is equivalent to the upper cover 12 having additional reinforcing beams, indirectly improving the structural strength of the upper cover 12 of the battery pack 10.

[0044] The battery pack 10 according to the second aspect embodiment of the present invention includes: a battery housing and a battery module 14. An accommodation cavity is formed between the bottom plate 11 and the cover plate 13, and the battery module 14 is disposed in the accommodation cavity. The cover plate 13 and the upper cover 12 replace a separate liquid cooling plate, reducing the lower cooling plate, saving the cost of the lower cooling plate, and improving the volume utilization rate of the battery pack 10. With the reduction of components, the improvement of integration also reduces the overall assembly process and operation steps of the battery pack 10. While the work efficiency is improved, the qualified rate of the product will also be improved.

[0045] The electrical equipment according to the third aspect embodiment of the present invention includes: a battery pack 10. In the present invention, the cover plate 13 and the upper cover 12 replace the original separate liquid cooling plate, reducing the number of components and also reducing the overall weight of the battery pack 10, indirectly improving the mass energy density of the battery pack 10, which means that the electrical equipment has higher endurance and faster acceleration.

[0046] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0047] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0048] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery housing, characterized in that, Comprising: Bottom plate (11); Upper cover (12), the upper cover (12) being disposed on the bottom plate (11); Cover plate (13), an accommodation cavity being formed between the cover plate (13) and the bottom plate (11), the accommodation cavity being used for arranging a battery module (14), the cover plate (13) being connected to the upper cover (12) to form a liquid cooling cavity (16) between the cover plate (13) and the upper cover (12), the liquid cooling cavity (16) being used for circulating a liquid cooling working medium.

2. The battery housing according to claim 1, characterized in that, The upper cover (12) comprises: a bottom wall (121) and an annular side wall (122), the annular side wall (122) being connected to the peripheral side of the bottom wall (121), a clamping portion (123) being arranged on the annular side wall (122), the clamping portion (123) being annularly arranged on the annular side wall (122), and the cover plate (13) being clamped with the clamping portion (123).

3. The battery housing according to claim 2, wherein The clamping portion (123) is a groove.

4. The battery housing according to claim 2, characterized in that, An inlet and an outlet are arranged on the annular side wall (122), and the liquid cooling cavity (16) communicates with the inlet and the outlet.

5. The battery housing according to claim 2, characterized in that, Further comprising: A first seal (17), the first seal (17) being clamped between the cover plate (13) and the clamping portion (123).

6. The battery housing according to claim 5, characterized in that, Further comprising: A second seal, the second seal being disposed between the first seal (17) and the clamping portion (123).

7. The battery housing according to claim 1, characterized in that, Further comprising: A first heat conducting layer (15), the first heat conducting layer (15) being disposed between the cover plate (13) and the battery module (14) for realizing heat transfer between the battery module (14) and the cover plate (13).

8. The battery housing according to claim 1, characterized in that, A plurality of spaced baffles are arranged on the bottom plate (11), the baffles extending along the height direction of the battery housing, and a plurality of mutually closed liquid cooling cavities (16) are formed between the cover plate (13) and the plurality of baffles.

9. A battery pack, characterized in that, Comprising: The battery housing according to any one of claims 1 - 8; A battery module (14), the battery module (14) being arranged in the accommodation cavity.

10. An electrical device, characterized in that, Comprising: The battery pack (10) according to claim 9.

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