Battery module

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module, which has a first direction, a second direction and a third direction which are intersected pairwise, and comprises a heat dissipation shell, a heat insulation module, a plurality of groups of battery units, a plurality of heat dissipation modules and a heat dissipation material layer, the heat insulation module is provided with a plurality of accommodating cavities, the plurality of accommodating cavities are separately arranged in the second direction and the third direction at intervals, the plurality of battery units are inserted into the plurality of accommodating cavities in a one-to-one correspondence manner, and the two ends of each battery unit in the first direction are connected with the heat dissipation modules; and the heat dissipation material layer is arranged between the heat dissipation module and the inner wall of the heat dissipation shell. The battery module has the beneficial effects that the heat insulation structure is arranged, so that mutual influence of heat of the battery units is avoided, the overall heat dissipation of the battery module is uniform, the temperature difference in the battery module is reduced, and the overall service life of the battery pack is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery module. Background Technology

[0002] Battery packs, composed of battery modules, are core components of new energy and are widely used in electric vehicles, hybrid vehicles, energy storage systems, and other applications requiring large capacity and high voltage. They have advantages such as high energy density, high voltage platform, long cycle life, and good safety performance.

[0003] To improve the stability of the battery pack during charging and discharging, heat dissipation designs are implemented for the battery modules. Common methods include using thermally conductive potting compound for heat dissipation. However, the heat from each battery cell affects the others, creating a large heat-affected zone. This causes heat to concentrate around some battery cells, making heat dissipation difficult. Furthermore, the different distribution of battery cells within the heat sink leads to uneven temperature distribution throughout the battery module, resulting in significant temperature differences and reducing the overall lifespan of the battery pack. Utility Model Content

[0004] The purpose of this utility model is to provide a battery module with a heat insulation structure to prevent the heat of the battery cells from affecting each other, while making the overall heat dissipation of the battery module uniform, reducing the internal temperature difference of the battery module, and improving the overall service life of the battery pack.

[0005] To achieve the above objectives, this utility model provides a battery module having a first direction, a second direction and a third direction intersecting in pairs, including a heat dissipation shell, a heat insulation module, multiple battery cells and multiple heat dissipation modules disposed within the heat dissipation shell, and a heat dissipation material layer;

[0006] The battery cell extends in the first direction. The heat insulation module has multiple receiving cavities. Each receiving cavity has a heat dissipation port at both ends along the first direction. The multiple receiving cavities are spaced apart in the second direction and the third direction. The multiple battery cells are inserted into the multiple receiving cavities one by one. Each battery cell is connected to the heat dissipation module at both ends in the first direction. The heat dissipation material layer is provided between the heat dissipation module and the inner wall of the heat dissipation shell.

[0007] Furthermore, the heat dissipation module includes a first busbar, a first thermally conductive adhesive layer, and a first thermally conductive plate arranged sequentially away from the battery cell in the first direction;

[0008] The side of the first busbar facing the heat insulation module is in contact with one end of the battery unit. The side of the first busbar facing away from the battery unit is coated with the first thermally conductive adhesive layer. The first thermally conductive plate is attached to the side of the first thermally conductive adhesive layer facing away from the first busbar. The heat dissipation material layer is filled between the first thermally conductive plate and the heat dissipation shell.

[0009] Furthermore, the bottom of the heat dissipation shell is provided with a sealant layer, the bottom of the first heat-conducting plate is in contact with the sealant layer, and two sealing plates are provided on one side of the first heat-conducting plate facing the heat dissipation shell, with the two sealing plates spaced apart at both ends extending along the second direction on the side.

[0010] The first heat-conducting plate, the sealing plate, the sealant layer, and the sidewall of the heat dissipation shell cooperate to form a gap for filling the heat dissipation material layer.

[0011] Furthermore, the heat insulation module is a heat insulation board, and the heat insulation board has a receiving cavity extending through both sides in the second direction and the third direction.

[0012] Furthermore, the heat insulation module includes multiple ceramic tubes arranged parallel to each other in the second direction and the third direction, and each ceramic tube is provided with the receiving cavity.

[0013] Furthermore, the length of the receiving cavity extending in the first direction is less than the length of the battery cell extending in the first direction.

[0014] Furthermore, the outer wall of the heat dissipation shell is provided with heat dissipation teeth.

[0015] Furthermore, the battery cell includes a plurality of battery cells spaced apart in the first direction;

[0016] A heat insulation module corresponding to the battery cell is provided in the first direction, and a heat conduction component is provided between adjacent battery cells. The heat conduction component is used to transfer heat between itself and the heat dissipation shell.

[0017] Furthermore, the heat-conducting component includes a second heat-conducting plate, a second heat-conducting adhesive layer, and a second busbar. The second heat-conducting plate has the second heat-conducting adhesive layer on both sides in the first direction, and the second busbar is attached to the other side of the second heat-conducting adhesive layer. The other side of the second busbar is in contact with one end of the battery cell in the first direction.

[0018] Furthermore, the heat dissipation shell includes a housing and an end cap. The heat insulation module and multiple battery units are all disposed inside the housing. The housing has an opening at one end facing the third direction, and the end cap is provided at the opening to seal the housing.

[0019] Compared with the prior art, the battery module of this utility model has the following advantages: It includes a heat insulation module with cavities for housing battery cells. Each cavity corresponds to a battery cell, separating them and ensuring that the heat generated by the battery cells is dissipated from both ends in the first direction, preventing heat interference between battery cells and facilitating heat dissipation. Simultaneously, by connecting heat dissipation modules to both ends of the battery cells in the first direction and using a heat dissipation material layer and a heat dissipation shell for heat dissipation, the heat dissipation difference between battery cells is reduced, further reducing the internal temperature difference of the battery module and improving the overall service life of the battery pack. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the battery module structure according to an embodiment of the present invention;

[0021] Figure 2 This is an exploded view of the battery module components according to an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the installation of the battery unit in the battery module of this utility model embodiment;

[0023] Figure 4 This is a schematic diagram of the heat dissipation module of the battery module in an embodiment of this utility model;

[0024] Figure 5 This is an exploded view of the heat dissipation module of the battery module in an embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the heat insulation module of the battery module in an embodiment of this utility model;

[0026] Figure 7 This is a top view of the heat insulation module of the battery module according to an embodiment of the present utility model;

[0027] Figure 8 This is another structural schematic diagram of the heat insulation module of the battery module in this embodiment of the utility model;

[0028] Figure 9 This is a partial schematic diagram of the heat insulation module of the battery module in an embodiment of this utility model;

[0029] Figure 10 This is a schematic diagram of the installation of the foam in the battery module according to an embodiment of this utility model;

[0030] Figure 11This is a schematic diagram of the structure of the heat-conducting component of the battery module according to an embodiment of this utility model;

[0031] Figure 12 This is an exploded view of the heat-conducting components of the battery module according to an embodiment of this utility model;

[0032] Figure 13 This is a cross-sectional view of the battery module according to an embodiment of the present invention;

[0033] Figure 14 yes Figure 13 A magnified view of a portion of the image;

[0034] Figure 15 This is a schematic diagram of the installation of the first busbar of the battery module in an embodiment of this utility model;

[0035] Figure 16 This is a top view of the battery module according to an embodiment of the present invention.

[0036] In the figure, 1 is the heat sink; 11 is the housing; 111 is the heat dissipation tooth; 12 is the end cap; 112 is the opening; 2 is the heat insulation module; 21 is the receiving cavity; 211 is the heat dissipation port; 3 is the battery unit; 31 is the battery cell; 4 is the heat dissipation module; 41 is the first busbar; 42 is the first thermally conductive adhesive layer; 43 is the first thermally conductive plate; 5 is the heat dissipation material layer; 6 is the sealing plate; 7 is the thermally conductive component; 71 is the second thermally conductive plate; 72 is the second thermally conductive adhesive layer; 73 is the second busbar; a is the gap; X is the first direction; Y is the second direction; Z is the third direction. Detailed Implementation

[0037] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer" and other terms used in this utility model to indicate the orientation or positional relationship are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device and element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0040] like Figures 1 to 16 As shown, a preferred embodiment of the present invention provides a battery module having intersecting first directions X, second directions Y, and third directions Z. It includes a heat dissipation shell 1, a heat insulation module 2, multiple battery cells 3, multiple heat dissipation modules 4, and a heat dissipation material layer 5 disposed within the heat dissipation shell 1. See also... Figure 1 The first direction X is the length direction of the heat sink 1, the second direction Y is the width direction of the heat sink 1, and the third direction Z is the height direction of the heat sink 1.

[0041] Specifically, the battery unit 3 extends in the first direction X. The heat insulation module 2 has multiple receiving cavities 21, and heat dissipation vents 211 are respectively provided at both ends of the receiving cavities 21 in the first direction. The multiple receiving cavities are spaced apart in the second direction Y and the third direction Z. In order to avoid the heat between the battery units 3 affecting each other and causing heat to concentrate around some battery units 3, making it difficult to dissipate heat, the multiple battery units 3 are inserted into the multiple receiving cavities 21 one by one. The heat insulation module 2 is used to isolate the battery units 3 from each other, that is, each battery unit 3 has an independent installation space and avoids peripheral contact between adjacent battery units 3. Therefore, the heat generated by each battery unit 3 is conducted out from both ends in the first direction X. In order to facilitate heat dissipation, heat dissipation modules 4 are connected to both ends of the battery unit 3 in the first direction. A heat dissipation material layer 5 is provided between the heat dissipation module 4 and the inner wall of the heat dissipation shell 1. The heat generated by the battery unit 3 is conducted out from the heat dissipation modules 4 at both ends to the heat dissipation material layer 5 and dissipated through heat exchange with the external environment through the heat dissipation shell 1. Through multi-stage heat conduction, the heat dissipation of each battery unit 3 in the battery module is uniform, reducing the internal temperature difference of the battery module and improving the overall service life of the battery pack.

[0042] In some embodiments, to facilitate the dissipation of heat generated by the battery unit 3 and reduce the overall structure of the heat dissipation module 4, see [reference]. Figure 4 , Figure 5The heat dissipation module 4 includes a first busbar 41, a first thermally conductive adhesive layer 42, and a first thermally conductive plate 43 arranged sequentially in the first direction X away from the heat insulation module 2. The side of the first busbar 41 facing the heat insulation module 2 contacts one end of the battery unit 3. Since the first busbar 41 is generally made of copper or aluminum, it has a certain heat dissipation effect. To facilitate further heat dissipation to the outside of the battery module, the side of the first busbar 41 facing away from the battery unit is coated with the first thermally conductive adhesive layer 42. The gap between the first busbar 41 and the battery unit 3 is also filled with the adhesive from the first thermally conductive adhesive layer 42, thus adding a flexible connection structure between the battery unit 3 and the first busbar 41 and improving the stability of the connection between the first busbar 41 and the battery unit 3. The first thermally conductive plate 43 is attached to the side of the first thermally conductive adhesive layer 42 facing away from the first busbar 41, and a heat dissipation material layer 5 is filled between the first thermally conductive plate 43 and the inner wall of the heat dissipation shell 1. In this embodiment, in order to reduce the manufacturing cost of the first heat-conducting plate 43, the first heat-conducting plate 43 is made of aluminum plate.

[0043] The thermal insulation module 2 typically needs to be made of a material with good thermal insulation properties. In some embodiments of this application, to facilitate the processing of the thermal insulation module 2, the thermal insulation module 2 is a thermal insulation board. Specifically, see [link to relevant documentation]. Figure 6 , Figure 7 The heat insulation plate has receiving cavities 21 extending through its two sides in the second direction Y and the third direction Z for installing battery units 3. During installation, the battery units 3 can be directly inserted into the receiving cavities 21.

[0044] In some other embodiments, see Figure 8 , Figure 9 The heat insulation module 2 includes multiple ceramic tubes arranged parallel to each other in the second direction Y and the third direction Z. Each ceramic tube has a receiving cavity 21. Each ceramic tube needs to be installed individually. The manufacturing material of the heat insulation module 2 can be selected according to actual production needs. Since each battery unit 3 is located in a separate receiving cavity 21, the heat around each battery unit 3 is uniform. Each battery unit 3 dissipates heat through both ends in the first direction X, making the heat dissipation of the battery module uniform and reducing the internal temperature difference of the battery module. In this embodiment, the shape of the receiving cavity 21 is circular, which is suitable for the heat dissipation design of cylindrical battery units 3. The shape of the receiving cavity 21 can also be adapted to the shape of the battery unit 3.

[0045] Furthermore, since the heat insulation module 2 has a heat insulation effect but poor thermal conductivity, in order to facilitate heat conduction between the two ends of the battery unit 3 and the first busbar 41, refer to... Figure 15The length of the receiving cavity 21 extending in the first direction X is less than the length of the battery unit 3 extending in the first direction X. That is, both ends of the battery unit 3 extend out from the receiving cavity 21, which facilitates the connection between the first busbar 41 and the battery unit 3 and avoids contact with the heat insulation module 2. This would result in insufficient contact between the battery unit 3 and the first busbar 41, affecting heat dissipation.

[0046] Furthermore, in this embodiment, to facilitate the connection between the heat insulation module 2 and the heat dissipation shell 1, and to ensure the internal sealing of the heat dissipation shell 1, a sealing adhesive layer is provided at the bottom of the heat dissipation shell 1. (See also...) Figure 13 , Figure 14 Specifically, the bottom of the first heat-conducting plate 43 is in contact with the sealant layer. After the heat-conducting adhesive layer is applied to the first heat-conducting plate 43, in order to facilitate the formation of a gap a between it and the inner wall of the heat sink 1 to fill the gap a of the heat dissipation material layer 5, two sealing plates 6 are provided on one side of the first heat-conducting plate 43 facing the heat sink 1. The two sealing plates 6 are spaced apart at both ends extending along the second direction Y on the side. The first heat-conducting plate 43, the sealing plates 6, the sealant layer, and the side wall of the heat sink 1 cooperate to form the gap a for filling the heat dissipation material layer 5. Furthermore, in order to facilitate the formation of a seal between the sealing plate 6 and the heat sink 1 and the side wall of the first heat-conducting plate 43, the sealing plate 6 is made of foam. The thickness of the foam is greater than the gap between the first heat-conducting plate 43 and the side wall of the heat sink 1. The foam is compressed and deformed to form a seal between itself and the heat sink 1 and the side wall of the first heat-conducting plate 43.

[0047] Thermally conductive adhesive is injected into the gap at the top of the heat sink 1 to form a heat dissipation material layer 5, allowing heat transfer between the first heat-conducting plate 43 and the heat sink 1. Heat from the first heat-conducting plate 43 is transferred to the heat sink 1, enabling heat exchange between the heat sink 1 and the external environment. Furthermore, to improve the heat exchange efficiency between the heat sink 1 and the external environment and increase the heat dissipation area, heat dissipation fins 111 are evenly distributed on the outer wall of the heat sink 1 near the heat-conducting plate. Figure 16 As shown, the heat dissipation teeth 111 are arranged at intervals in the second direction Y and extend along the third direction Z. The cross-sectional shape of the teeth in the direction perpendicular to the third direction Z is rectangular, triangular or trapezoidal, and the shape can be adaptively adjusted according to the actual heat dissipation requirements.

[0048] In this embodiment, the battery unit 3 includes a plurality of battery cells 31 spaced apart in the first direction X, and a heat insulation module 2 corresponding to the battery cells 31 is provided in the first direction X, such as... Figure 11 , Figure 12As shown, a single battery cell 3 includes two battery cells 31 spaced apart in the first direction X. Therefore, there are two heat insulation modules 2 in the first direction X. In the first direction X, to facilitate heat dissipation between adjacent battery cells 31, a heat-conducting component 7 for transferring heat between adjacent battery cells 31 and the heat dissipation shell 1 is provided. Specifically, the heat-conducting component 7 includes a second heat-conducting plate 71, a second heat-conducting adhesive layer 72, and a second busbar 73. In this embodiment, the number of the second busbar 73 and the second heat-conducting adhesive layer 72 are both two. Specifically, the second heat-conducting plate 71 has a second heat-conducting adhesive layer 72 on both ends in the first direction X, and the other end of the second heat-conducting adhesive layer 72 is attached to a second busbar 73. The other end of the second busbar 73 is in contact with one end of the battery cell 31. That is, a second busbar is provided on both sides of the second heat-conducting plate 71, and a second thermally conductive adhesive layer 72 is provided between the second heat-conducting plate 71 and the second busbar 73. The overall heat dissipation effect of the heat-conducting component 7 can be improved by increasing the thickness of the second heat-conducting plate 71 in the first direction X.

[0049] Furthermore, to facilitate the design of the heat dissipation shell 1 and the assembly of the battery module, the heat dissipation shell 1 includes a shell 11 and an end cap 12. The heat insulation module 2 and multiple battery units 3 are all housed within the shell 11. The shell 11 has an opening 112 at one end in the Z-direction, and the end cap 12 is provided at the opening 112 to seal the shell 11. That is, after the bottom of the shell 11 is filled with a sealant layer, the multiple battery units 3, the heat insulation module 2, and the heat dissipation module 4 are assembled and then inserted into the shell 11 as a whole, and the heat dissipation material layer 5 is filled in. Then, the end cap 12 is assembled with the shell 11 to complete the assembly of the battery module. The overall structure is simple and the assembly efficiency is improved.

[0050] In summary, this embodiment of the utility model provides a battery module with a heat insulation module 2. The heat insulation module 2 has a receiving cavity 21 for installing battery cells 3. The receiving cavity 21 corresponds one-to-one with the battery cells 3, separating each battery cell 3 and allowing the heat generated by the battery cells 3 to be discharged from both ends in the first direction X, avoiding mutual heat interference between the battery cells 3 and facilitating heat dissipation. At the same time, by connecting heat dissipation modules 4 to both ends of the battery cells 3 and dissipating heat through the heat dissipation material layer 5 and the heat dissipation shell 1, the heat dissipation difference between the battery cells 3 is reduced, further reducing the internal temperature difference of the battery module and improving the overall service life of the battery pack.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery module having intersecting first, second, and third directions, characterized in that: It includes a heat dissipation shell, a heat insulation module, multiple battery units and multiple heat dissipation modules disposed within the heat dissipation shell, and a heat dissipation material layer; The battery cell extends in the first direction. The heat insulation module has multiple receiving cavities. Each receiving cavity has a heat dissipation port at both ends along the first direction. The multiple receiving cavities are spaced apart in the second direction and the third direction. The multiple battery cells are inserted into the multiple receiving cavities one by one. Each battery cell is connected to the heat dissipation module at both ends in the first direction. The heat dissipation material layer is provided between the heat dissipation module and the inner wall of the heat dissipation shell.

2. The battery module as described in claim 1, characterized in that: The heat dissipation module includes a first busbar, a first thermally conductive adhesive layer, and a first thermally conductive plate arranged sequentially away from the battery cell in the first direction. The side of the first busbar facing the heat insulation module is in contact with one end of the battery unit. The side of the first busbar facing away from the battery unit is coated with the first thermally conductive adhesive layer. The first thermally conductive plate is attached to the side of the first thermally conductive adhesive layer facing away from the first busbar. The heat dissipation material layer is filled between the first thermally conductive plate and the heat dissipation shell.

3. The battery module as described in claim 2, characterized in that: The bottom of the heat dissipation shell is provided with a sealing layer, the bottom of the first heat-conducting plate is in contact with the sealing layer, and two sealing plates are provided on one side of the first heat-conducting plate facing the heat dissipation shell. The two sealing plates are spaced apart at both ends of the side extending along the second direction. The first heat-conducting plate, the sealing plate, the sealant layer, and the sidewall of the heat dissipation shell cooperate to form a gap for filling the heat dissipation material layer.

4. The battery module as described in claim 1, characterized in that: The heat insulation module is a heat insulation board, and the heat insulation board has a receiving cavity extending through both sides in the second direction and the third direction.

5. The battery module as described in claim 1, characterized in that: The heat insulation module includes multiple ceramic tubes, which are arranged parallel to each other in the second direction and the third direction, and each ceramic tube is provided with the receiving cavity.

6. The battery module as described in claim 1, characterized in that: The length of the receiving cavity extending in the first direction is less than the length of the battery cell extending in the first direction.

7. The battery module as described in claim 1, characterized in that: The outer wall of the heat sink is provided with heat dissipation teeth.

8. The battery module as described in claim 1, characterized in that: The battery cell includes a plurality of battery cells spaced apart in the first direction; A heat insulation module corresponding to the battery cell is provided in the first direction, and a heat conduction component is provided between adjacent battery cells. The heat conduction component is used to transfer heat between the battery cell and the heat sink.

9. The battery module as described in claim 8, characterized in that: The thermal conductive component includes a second thermal conductive plate, a second thermal conductive adhesive layer, and a second busbar; The second heat-conducting plate has a second thermally conductive adhesive layer on both sides in the first direction, and a second busbar is attached to the other side of the second thermally conductive adhesive layer. The other side of the second busbar is in contact with one end of the battery cell in the first direction.

10. The battery module as described in claim 1, characterized in that: The heat dissipation shell includes a shell and an end cap. The heat insulation module and multiple battery units are all disposed inside the shell. The shell has an opening at one end facing the third direction, and the end cap is provided at the opening to seal the shell.

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