Battery module shell, battery module and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery module shell, a battery module and a battery pack, the battery module shell comprises a shell body, a storage cavity used for containing a battery pack is arranged in the shell body, a cooling window communicated with the storage cavity is further arranged on the shell body, the cooling window is opposite to a cooling piece, and the battery pack is arranged in the storage cavity. And the cooling window is used for cooling the battery pack by the cooling piece. According to the battery pack, the cooling window opposite to the cooling piece is formed in the shell, so that the cooling piece can cool the battery pack without penetrating through the shell under the action of the cooling window, the transmission level is greatly reduced, the transmission path is shortened, the cooling efficiency is improved, and the timeliness of heat dissipation is ensured.

Description

Technical Field

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

[0002] With the increasing maturity of power battery technology, power batteries are gradually applied in various industries. As a commonly used power supply unit, a battery pack is internally provided with a plurality of battery modules connected in series and parallel. During use, it needs to be controlled within a reasonable temperature range to be used normally. Therefore, temperature control treatment is required for the battery pack. A common method is to set a liquid cooling plate in the battery pack box body. By placing the battery module on the liquid cooling plate, heat transfer is used to cool down the battery module.

[0003] Among them, the battery module includes a battery pack composed of a plurality of batteries, and a housing formed by a bottom plate, a cover plate, side plates and end plates for accommodating and protecting the battery pack. The battery pack is bonded to the bottom plate by structural adhesive, and the bottom plate is bonded to the liquid cooling plate by structural adhesive. When heat transfer occurs, when the heat is transferred from the battery pack outward, it passes through the structural adhesive between the battery pack and the bottom plate, the bottom plate, and the structural adhesive between the bottom plate and the liquid cooling plate in sequence before it can be transferred to the liquid cooling plate. Its transfer levels are numerous and the heat transfer path is long, so that the battery pack cannot be cooled down in time and effectively, resulting in low cooling efficiency of the battery pack and untimely heat dissipation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery module housing, a battery module and a battery pack, which have fewer transfer levels, a short heat transfer path, high cooling efficiency and timely heat dissipation.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] On the one hand, a battery module housing is provided. The battery module housing is connected to a battery pack box body. A cooling member is provided on the battery pack box body. The battery module housing includes a housing. A storage cavity for accommodating a battery pack is provided in the housing. A cooling window communicating with the storage cavity is further opened on the housing. The cooling window faces the cooling member, and the cooling window is used to realize the cooling of the battery pack by the cooling member.

[0007] Optionally, the housing includes a plurality of enclosing members, and the plurality of enclosing members surround to form a hollow structure. The cooling window is opened on the enclosing member facing the cooling member.

[0008] Optionally, a bearing structure for bearing the battery pack is formed on the enclosing member provided with the cooling window.

[0009] Optionally, a first heat-conducting layer is provided on one side of the battery pack facing the cooling window, and the first heat-conducting layer is disposed between the battery pack and the cooling member;

[0010] And / or, a second heat-conducting layer is provided on the side of the battery pack facing away from the cooling window, and the second heat-conducting layer is disposed between the side of the battery pack facing away from the cooling member and the housing.

[0011] Optionally, a first heat-conducting layer is provided on one side of the battery pack facing the cooling window, and the surface of the first heat-conducting layer adhered to the cooling member is flush with the surface of the housing (1) facing the cooling member.

[0012] Optionally, at least one connecting protrusion is provided on the housing, and at least one of the connecting protrusions is detachably connected to the battery pack box body.

[0013] Optionally, two adjacent closures are welded to each other.

[0014] On the other hand, a battery module is further provided, and the battery module includes a battery pack and the battery module housing according to any one of the above, and the battery pack is fixedly connected to the storage cavity of the housing.

[0015] On the other hand, a battery pack is provided, and the battery pack includes a battery pack box body, a battery pack box cover, and a plurality of battery modules as described above. The battery pack box cover is provided on the battery pack box body (100) to form an accommodation chamber, and the battery module is fixedly connected to the accommodation chamber.

[0016] Optionally, the battery pack box body is provided with placement grooves corresponding to the plurality of battery modules one by one, and the plurality of battery modules are respectively fixedly connected in the corresponding placement grooves. The cooling member is disposed in the placement groove of the battery pack box body, and the cooling member is used to cool the battery pack through the cooling window.

[0017] Advantages of the present utility model:

[0018] The present utility model provides a battery module housing, which is connected to a battery pack box body. A cooling member is provided on the battery pack box body. The battery module housing includes a housing, and a storage cavity for accommodating a battery pack is provided in the housing. A cooling window communicating with the storage cavity is further provided on the housing, and the cooling window faces the cooling member, so that the cooling member can cool the battery pack without passing through the housing under the action of the cooling window, thereby greatly reducing the transfer level, shortening the transfer path, improving the cooling efficiency, and ensuring the timeliness of heat dissipation.

[0019] The present utility model also provides a battery module. By applying the above-mentioned battery module housing, the present battery module reduces the levels of heat transfer during the heat dissipation and cooling of the battery pack, thereby having a higher cooling efficiency.

[0020] The present utility model also provides a battery pack. The battery pack is composed of a plurality of the above-mentioned battery modules, such that the battery modules inside the battery pack have a high cooling efficiency, ensuring a suitable ambient temperature inside, improving the performance of the battery pack, and extending the service life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the battery module housing provided by the present utility model;

[0022] Figure 2 is an exploded view of the structure of the battery pack provided by the present utility model;

[0023] Figure 3 is a partial structural cross-sectional view of the battery pack provided by the present utility model;

[0024] Figure 4 is a schematic diagram of the connection relationship between the closure and the bearing structure in the battery module housing provided by the present utility model.

[0025] In the figures:

[0026] 100, battery pack box body; 101, placement groove; 102, connection boss; 200, battery pack; 300, first heat-conducting layer; 400, second heat-conducting layer;

[0027] 1, housing; 11, cooling window; 12, closure; 13, bearing structure; 14, connection protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, 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, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] With the increasing maturity of power battery technology, power batteries are gradually applied in various industries. As a commonly used power supply unit, the battery pack is internally provided with a plurality of battery modules connected in series and parallel. During use, it needs to be controlled within a reasonable temperature range to be used normally. Therefore, temperature control treatment needs to be carried out on the battery pack. A common method is to set a liquid cooling plate in the battery pack box body. By placing the battery module on the liquid cooling plate, heat transfer is used to cool down the battery module.

[0033] Among them, the battery module includes a battery pack composed of a plurality of batteries, and a housing formed by a bottom plate, a cover plate, side plates and end plates for accommodating and protecting the battery pack. The battery pack is bonded to the bottom plate through structural adhesive, and the bottom plate is bonded to the liquid cooling plate through structural adhesive. When heat transfer occurs, when heat is transferred from the battery pack outward, it successively passes through the structural adhesive between the battery pack and the bottom plate, the bottom plate, and the structural adhesive between the bottom plate and the liquid cooling plate before it can be transferred to the liquid cooling plate. The transfer levels are more, and the heat transfer path is longer, so that the battery pack cannot be cooled down in time and effectively, resulting in low cooling efficiency of the battery pack and untimely heat dissipation.

[0034] Therefore, in order to reduce the transfer levels, shorten the transfer path, improve the cooling efficiency and ensure the timeliness of heat dissipation, this embodiment provides a battery module housing, which is connected to the battery pack box body, and a cooling member is provided on the battery pack box body.

[0035] Such as Figures 1 to 4As shown in the figure, the battery module housing includes a housing 1. A storage cavity for accommodating the battery pack 200 is provided inside the housing 1. A cooling window 11 communicating with the storage cavity is also provided on the housing 1. The cooling window 11 faces the cooling member, and the cooling window 11 is used to enable the cooling member to cool the battery pack 200.

[0036] The battery module housing is connected to the battery pack box body 100. A cooling member is provided on the battery pack box body 100. The battery module housing includes a housing 1. A storage cavity for accommodating the battery pack 200 is provided inside the housing 1. A cooling window 11 communicating with the storage cavity is also provided on the housing 1. The cooling window 11 faces the cooling member, so that the cooling member can cool the battery pack 200 without passing through the housing 1 and the battery pack 200, thereby greatly reducing the transfer levels and shortening the transfer path, improving the cooling efficiency and ensuring the timeliness of heat dissipation.

[0037] In this embodiment, when it is necessary to cool down the battery pack 200, the cooling member can be connected to an external refrigeration device. The refrigeration device realizes the cooling function of the cooling member by introducing a flowing gaseous or liquid refrigeration medium into the cooling member. At this time, the cooling member can adopt a liquid cooling plate. The cooling member can directly cool the battery pack 200 through the cooling window 11. In addition, a heat-conducting material can be provided on the side of the battery pack 200 facing the cooling window 11, so as to enhance the cooling effect of the cooling member on the battery pack 200.

[0038] When the battery pack 200 works in a low-temperature environment, the power supply efficiency of the battery pack 200 will be reduced. Therefore, sometimes it is also necessary to heat up the battery pack 200. When it is necessary to heat up the battery pack 200, the cooling member can also be connected to an external heating device. The heating device realizes the heating function of the cooling member by introducing a flowing gas or liquid heating medium into the cooling member. At this time, the cooling member can adopt a liquid cooling plate. The cooling member can directly heat the battery pack 200 through the cooling window 11. In addition, a heat-conducting material can be provided on the side of the battery pack 200 facing the cooling window 11, so as to enhance the heating effect of the cooling member on the battery pack 200.

[0039] In addition to using an open cooling member and connecting it to an external refrigeration device or heating device to realize the cooling or heating function, a closed cooling member can also be used. A phase change material is filled inside the cooling member, and the phase change reaction of the phase change material is used to realize the temperature regulation and the heating or cooling function of the cooling member. At this time, the cooling member can adopt a plate-shaped micro heat pipe.

[0040] Optionally, the housing 1 includes a plurality of closures 12, which together enclose a hollow structure, and the cooling window 11 is opened on the closure 12 opposite to the cooling member. By using a plurality of closures 12 to form a hollow structure and opening the cooling window 11 on the closure 12 opposite to the cooling member, the opening of the cooling window 11 can be adapted to different heat dissipation methods.

[0041] The shape of the housing 1 can be freely defined according to requirements. The housing 1 can be a cylindrical box or a six-sided box. According to different shapes, closures 12 of suitable shapes are selected. In the cylindrical box, the closures 12 are two circular plates and a curved panel. In the six-sided box, the closures 12 are six flat plates.

[0042] In this embodiment, the housing 1 is a six-sided box. The closures 12 made of six flat plates can be further classified according to different assembly positions. The six closures 12 are divided into a top plate, a bottom plate, and four side plates. When the battery module uses bottom heat dissipation, the cooling window 11 is opened on the closure 12 serving as the bottom plate. When the battery module uses top heat dissipation, the cooling window 11 is opened on the closure 12 serving as the top plate. When the battery module uses side heat dissipation, the cooling window 11 is opened on the closure 12 serving as the side plate. In this embodiment, the bottom heat dissipation method is adopted. Therefore, in this embodiment, the cooling window 11 is opened on the closure 12 serving as the bottom plate.

[0043] Optionally, a bearing structure 13 for carrying the battery pack 200 is formed on the closure 12 provided with the cooling window 11. By forming a bearing structure 13 for carrying the battery pack 200 on the closure 12 provided with the cooling window 11, the bearing structure 13 is used to limit and carry the battery pack 200 to prevent the battery pack 200 from falling out of the storage cavity.

[0044] When the cooling window 11 is opened on the closure 12, the size, shape, and opening position of the cooling window 11 can form different-shaped bearing structures 13. In this embodiment, the cooling window 11 is rectangular, so that two strip-shaped bearing structures 13 are formed on the closure 12 after opening the cooling window 11 of this structure, and the two strip-shaped bearing structures 13 are respectively perpendicularly connected to the adjacent closures 12.

[0045] Optionally, a first heat-conducting layer 300 is provided on the side of the battery pack 200 facing the cooling window 11, and the first heat-conducting layer 300 is disposed between the battery pack 200 and the cooling member. By providing the first heat-conducting layer 300, the heat transfer effect is better and more uniform, thus helping to improve the cooling efficiency.

[0046] In this embodiment, the first heat-conducting layer 300 is a heat-conducting structural adhesive, which can, on the one hand, realize the bonding of the battery pack 200 and the cooling member, and on the other hand, improve the heat transfer effect.

[0047] Optionally, a second heat-conducting layer 400 is provided on the side of the battery pack 200 facing away from the cooling window 11. The second heat-conducting layer 400 is disposed between the side of the battery pack 200 facing away from the cooling member and the housing 1. By providing the second heat-conducting layer 400, the heat transfer effect is better and more uniform, thus helping to improve the cooling efficiency.

[0048] In this embodiment, the second heat-conducting layer 400 is a heat-conducting structural adhesive, which can realize the bonding of the battery pack 200 and the housing 1 on the one hand, and improve the heat transfer effect on the other hand.

[0049] Optionally, a first heat-conducting layer 300 is provided on the side of the battery pack 200 facing the cooling window 11. The surface of the first heat-conducting layer 300 bonded to the cooling member is flush with the surface of the housing 1 facing the cooling member. Since the heat conduction efficiency of air is extremely low, by making the surface of the first heat-conducting layer 300 bonded to the cooling member flush with the surface of the housing 1 facing the cooling member, on the one hand, the first heat-conducting layer 300 is used to eliminate the gap between the battery pack 200 and the cooling member, improve the cooling effect, and avoid the exposed area of the battery pack 200 from being suspended, affecting the structural strength. On the other hand, it effectively avoids the first heat-conducting layer 300 from overflowing the bonding area and causing unnecessary adhesion.

[0050] Optionally, at least one connecting protrusion 14 is provided on the housing 1. The at least one connecting protrusion 14 is detachably connected to the battery pack box body 100. By providing the connecting protrusion 14 on the housing 1, it is convenient to connect and fix the battery module housing to the battery pack box body 100. The position where the connecting protrusion 14 is provided depends on the heat dissipation method of the battery module, and the number of the connecting protrusions 14 can be freely set according to requirements.

[0051] In this embodiment, since the bottom heat dissipation method is adopted, the connecting protrusion 14 is provided on the closing member 12 serving as a side plate, and in order to ensure the firmness of the connection, the connecting protrusion 14 is provided on all four closing members 12 serving as side plates. A connecting through hole is provided on the connecting protrusion 14, and a connecting threaded hole corresponding to the connecting through hole is provided on the battery pack box body 100. The bolt is threadedly connected to the connecting threaded hole through the connecting through hole, thereby realizing the connection and fixation of the battery module housing to the battery pack box body 100.

[0052] Optionally, two adjacent closing members 12 are welded to each other. By using the welding method to connect multiple closing members 12 into one body, a high-strength battery module housing is formed, which can effectively protect the internal battery pack 200.

[0053] In this embodiment, a battery module is further provided. The battery module includes a battery pack 200 and the above-mentioned battery module housing, and the battery pack 200 is fixedly connected in the storage cavity of the housing 1. By applying the above-mentioned battery module housing, the battery module reduces the number of transfer levels during heat dissipation and cooling of the battery pack 200, and thus has higher cooling efficiency.

[0054] In this embodiment, a battery pack is further provided. The battery pack includes a battery pack box body 100, a battery pack cover, and multiple above-mentioned battery modules. The battery pack cover is provided on the battery pack box body 100 to form an accommodation chamber, and the battery modules are fixedly connected in the accommodation chamber. Since the battery pack is composed of multiple above-mentioned battery modules, the battery modules inside the battery pack have higher cooling efficiency, ensuring a suitable internal ambient temperature, improving the performance of the battery pack, and extending the service life of the battery pack.

[0055] Optionally, the battery pack box body 100 is provided with placement grooves 101 corresponding one by one to the multiple battery modules, and the multiple battery modules are respectively fixedly connected in the corresponding placement grooves 101. A cooling member is arranged in the placement grooves 101 of the battery pack box body 100, and the cooling member is used to cool the battery pack 200 through the cooling window 11. Placing the battery modules in the placement grooves 101 facilitates the connection and fixation of the battery modules. Among them, the position of the cooling member in the placement grooves 101 can be adjusted according to the heat dissipation method of the battery module. When the battery module uses bottom heat dissipation, the cooling member is arranged at the bottom of the placement groove 101. When the battery module uses side cooling, the cooling member is arranged on the side wall of the placement groove 101.

[0056] In this embodiment, connection bosses 102 are arranged in the placement grooves 101, which facilitates the connection and fixation of the battery module housing and the battery pack box body 100, and is convenient for operators to assemble.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery module housing, wherein the battery module housing is connected to a battery pack box (100), and a cooling element is provided on the battery pack box (100), characterized in that: The battery module housing comprises a shell (1), wherein a storage cavity for accommodating a battery pack (200) is provided in the shell (1), and a cooling window (11) communicating with the storage cavity is also provided on the shell (1), wherein the cooling window (11) is opposite to the cooling element, and the cooling window (11) is used to enable the cooling element to cool the battery pack (200).

2. The battery module housing according to claim 1, characterized in that: The shell (1) comprises a plurality of closing members (12), the plurality of closing members (12) being combined to form a hollow structure, and the cooling window (11) is provided on the closing member (12) opposite to the cooling member.

3. The battery module housing according to claim 2, characterized in that: A bearing structure (13) for bearing the battery pack (200) is formed on the closing member (12) provided with the cooling window (11).

4. The battery module housing according to claim 1, characterized in that: A first heat-conducting layer (300) is provided on a side of the battery pack (200) facing the cooling window (11), and the first heat-conducting layer (300) is provided between the battery pack (200) and the cooling element; And / or, a second heat-conducting layer (400) is provided on a side of the battery pack (200) facing away from the cooling window (11), and the second heat-conducting layer (400) is provided between a side of the battery pack (200) facing away from the cooling element and the housing (1).

5. The battery module housing according to claim 1, characterized in that: A first heat-conducting layer (300) is provided on the side of the battery pack (200) facing the cooling window (11), and a surface of the first heat-conducting layer (300) bonded to the cooling element is flush with a surface of the housing (1) facing the cooling element.

6. The battery module housing according to claim 1, characterized in that: At least one connecting protrusion (14) is provided on the shell (1), and at least one connecting protrusion (14) is detachably connected to the battery pack case (100).

7. The battery module housing according to claim 2, characterized in that: Two adjacent closing pieces (12) are welded to each other.

8. A battery module, characterized in that: The battery module comprises a battery pack (200) and a battery module housing as claimed in any one of claims 1 to 7, and the battery pack (200) is fixedly connected to the storage cavity of the housing (1).

9. A battery pack, characterized in that: The battery pack comprises a battery pack case (100), a battery pack case cover and a plurality of battery modules as claimed in claim 8, wherein the battery pack case cover is arranged on the battery pack case (100) to form a containing chamber, and the battery module is fixedly connected in the containing chamber.

10. The battery pack according to claim 9, characterized in that: The battery pack case (100) is provided with placement grooves (101) corresponding one to one with the plurality of battery modules, the plurality of battery modules are respectively fixedly connected in the corresponding placement grooves (101), the cooling element is arranged in the placement grooves (101) of the battery pack case (100), and the cooling element is used to cool the battery pack (200) through the cooling window (11).

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