Heating and cooling structure of battery module and battery pack system

Abstract

The utility model discloses a heating and cooling structure of a battery module and a battery pack system, the heating and cooling structure comprises a heating film, a direct cooling plate and a structural adhesive, the heating film is arranged at the bottom of the battery module, the direct cooling plate is arranged at the bottom of the heating film, and the structural adhesive extends from the surface of the battery module to the surface of the direct cooling plate. Sequentially bonding the battery module, the heating film and the direct cooling plate; the battery pack system comprises a box cover, a box body, a protective plate, a battery module and a heating and cooling structure arranged on the battery module, the box body wraps the peripheral side of the battery module, the box cover and the protective plate are arranged at the top and the bottom of the box body respectively, and the heating and cooling structure is the heating and cooling structure; according to the utility model, the heating film and the direct cooling plate are fixed at the bottom of the battery module, so that a better heating effect and a better cooling effect can be provided, the temperature of the battery module can be effectively adjusted, and the efficient and stable work of the battery module is ensured.

Description

Technical Field

[0001] The utility model relates to a heating and cooling structure of a battery module and a battery pack system, belonging to the technical field of electric vehicles. Background Art

[0002] The power source of electric vehicles is the battery module. The performance of the battery module is greatly affected by temperature. High temperature increases the activity of the battery, and the energy can be more effectively exerted, including the battery's charging and discharging platform, efficiency, and available capacity. However, the battery life will be significantly shortened if it works in a high temperature environment for a long time. When the battery temperature is low, the battery activity is significantly reduced, the battery's internal resistance and polarization voltage increase, the actual available capacity decreases, the battery's discharge capacity decreases, the discharge platform is low, and the battery is more likely to reach the discharge cut-off voltage, which is manifested as a decrease in the battery's available capacity and a decrease in the battery's energy utilization efficiency. Therefore, it is necessary to provide an effective cooling and heating system for the battery module. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide a heating and cooling structure for a battery module and a battery pack system, which can effectively regulate the temperature of the battery module, thereby ensuring efficient and stable operation of the battery module.

[0004] In order to achieve the above purpose / solve the above technical problems, the utility model is implemented by adopting the following technical solutions:

[0005] In a first aspect, the utility model provides a heating and cooling structure of a battery module, the heating and cooling structure comprising:

[0006] A heating film is arranged at the bottom of the battery module;

[0007] A direct cooling plate, arranged at the bottom of the heating film;

[0008] The structural adhesive extends from the surface of the battery module to the surface of the direct cooling plate, and sequentially bonds the battery module, the heating film and the direct cooling plate.

[0009] Optionally, the heating film has a hollow area, and there are multiple hollow areas, which are arranged in sequence at intervals.

[0010] Optionally, the structural adhesive is a thermally conductive structural adhesive.

[0011] Optionally, the direct cooling plate includes a flat plate and a flow channel plate, the flow channel plate has a plurality of recessed areas, and the flat plate closes the recessed areas to form a cooling flow channel.

[0012] Optionally, the top of the flat plate has an installation area, and the installation area is used to set the heating film.

[0013] Optionally, the cooling channel includes an inlet, an outlet, a first cooling channel and a second cooling channel, the first cooling channel and the second cooling channel have the same structure and are symmetrically arranged on both sides; the first cooling channel and the second cooling channel both include a diversion area, a connection area and a confluence area, the connection area is connected to the inlet through the diversion area, and the connection area is connected to the outlet through the confluence area.

[0014] Optionally, the diversion area includes a plurality of diversion sections, one end of the plurality of diversion sections converges into a diversion inlet section and is connected to the inlet, and the other end of the plurality of diversion sections is split into a plurality of diversion outlet sections; the confluence area includes a plurality of confluence sections, one end of the plurality of confluence sections converges into a confluence outlet section and is connected to the outlet, and the other end of the plurality of confluence sections is split into a plurality of confluence inlet sections;

[0015] The connection area includes multiple connection sub-areas, the number of the connection sub-areas, the diversion outflow sections and the confluence inflow sections are the same and are arranged one by one. The connection sub-area includes multiple connection sections, one end of each of the connection sections is connected to the corresponding diversion outflow section, and the other end of each of the connection sections is connected to the corresponding confluence inflow section.

[0016] In a second aspect, the utility model provides a battery pack system, which includes a battery module and a heating and cooling structure configured on the battery module, and the heating and cooling structure is the above-mentioned heating and cooling structure.

[0017] Optionally, the battery pack system further includes a box cover, a box body and a protective plate, wherein the box body is wrapped around the battery module, and the box cover and the protective plate are respectively arranged on the top and bottom of the box body.

[0018] Optionally, a plurality of support members are sequentially arranged at intervals on the inner wall of the guard plate, and the top of the support member extends to the bottom of the direct cooling plate.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model provides a heating and cooling structure for a battery module, in which a heating film and a direct cooling plate are sequentially bonded to the bottom of the battery module by structural adhesive, wherein the heating film is arranged close to the battery module, and when the heating film is working, the heat can be directly transferred to the bottom of the battery module, and the heating efficiency is high; the direct cooling plate is arranged close to the heating film, and since the thickness of the heating film is relatively thin, the heat of the battery module can be transferred to the direct cooling plate relatively quickly, and at the same time, the direct cooling plate can also quickly take away the heat on the heating film, and avoid the residual heat of the heating film after working to heat the battery module, and the cooling efficiency is high. The cooling channels in the direct cooling plate are arranged regionally, and while covering the area of ​​the direct cooling plate, it is ensured that each area can efficiently transfer the coolant, thereby further improving the cooling efficiency; in summary, the heating and cooling structure can effectively adjust the temperature of the battery module, thereby ensuring the efficient and stable operation of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a heating and cooling structure of a battery module provided by an embodiment of the utility model;

[0022] Figure 2 It is a cross-sectional schematic diagram of a direct cooling plate provided by an embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the installation of the heating film and the direct cooling plate provided in the embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the cooling channel provided by the embodiment of the utility model;

[0025] Figure 5 It is a structural schematic diagram of a battery pack system provided by an embodiment of the utility model;

[0026] Figure 6 It is a bottom view schematic diagram of a box provided by an embodiment of the utility model;

[0027] The markings in the figure are:

[0028] 1-Box cover;

[0029] 2-Battery module;

[0030] 3-Structural adhesive;

[0031] 4-heating film; 41-hollow area;

[0032] 5-direct cooling plate; 51-flat plate; 52-flow channel plate; 53-recessed area; 54-cooling flow channel; 541-inlet; 542-outlet; 543-first cooling flow channel; 544-second cooling flow channel; 55-installation area;

[0033] 6- Support member;

[0034] 7-Box;

[0035] 8- Guard plate;

[0036] 10-diversion area; 101-diversion section; 102-diversion inlet section; 103-diversion outlet section;

[0037] 11-connecting region; 111-connecting subregion; 112-connecting segment;

[0038] 12- confluence area; 121- confluence section; 122- confluence outflow section; 123- confluence inflow section. DETAILED DESCRIPTION

[0039] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0040] Embodiment 1:

[0041] like Figure 1 As shown, this embodiment provides a heating and cooling structure for a battery module, including a heating film 4, a direct cooling plate 5 and a structural adhesive 3, the heating film 4 is arranged at the bottom of the battery module 2, and the direct cooling plate 5 is arranged at the bottom of the heating film 4; the structural adhesive 3 extends from the surface of the battery module 2 to the surface of the direct cooling plate 5, and sequentially bonds the battery module 2, the heating film 4 and the direct cooling plate 5.

[0042] The heating film 4 has a hollow area 41, and there are multiple hollow areas 41, which are arranged in sequence at intervals; specifically in this embodiment, the hollow area 41 is arranged in a strip shape, and the heating film 4 has a comb-like structure as a whole; in other optional embodiments, the size and shape of the hollow area 41 can be adjusted as needed.

[0043] The structural adhesive 3 is used as a component for bonding the battery module 2, the heating film 4 and the direct cooling plate 5. Specifically, in this embodiment, a heat-conducting structural adhesive is used. The heat-conducting structural adhesive has better thermal conductivity, which facilitates heat exchange between the battery module 2 and the heating film 4 and the direct cooling plate 5, and improves the heating and cooling efficiency. In other optional embodiments, the structural adhesive 3 can be selected as needed. The structural adhesive 3 can fully or partially cover the heating film 4, and its thickness must be greater than the thickness of the heating film 4, so that it can bond the battery module 2 and the direct cooling plate 5 located on both sides of the heating film 4.

[0044] like Figure 2 As shown, the direct cooling plate 5 includes a flat plate 51 and a flow channel plate 52. The flow channel plate 52 has a plurality of recessed areas 53. The flat plate 51 closes the recessed areas 53 to form cooling channels 54. The flat plate 51 and the flow channel plate 52 are usually fixed by welding.

[0045] like Figure 3 As shown, the top of the flat plate 51 has an installation area 55, and the installation area 55 is used to set the heating film 4; specifically in this embodiment, the installation area 55 can be a groove, a contour line, etc., which plays a role in positioning and auxiliary fixing for the installation of the heating film 4.

[0046] like Figure 4 As shown, the cooling channel 54 includes an inlet 541, an outlet 542, a first cooling channel 543 and a second cooling channel 544. The first cooling channel 543 and the second cooling channel 544 have the same structure and are symmetrically arranged on both sides; the first cooling channel 543 and the second cooling channel 544 both include a diversion area 10, a connection area 11 and a confluence area 12. The connection area 11 is connected to the inlet 541 through the diversion area 10, and the connection area 11 is connected to the outlet 542 through the confluence area 12. Specifically in this embodiment, the inlet 541 and the outlet 542 are arranged in the middle of the same side of the flat plate 51, one in front and one behind, and the input and output of the coolant are realized by opening a through hole on the flat plate 51 to communicate with it, and setting an inlet and outlet joint on the flat plate 51. In other optional embodiments, the positions of the inlet 541 and the outlet 542 can be determined as needed.

[0047] The diversion area 10 includes a plurality of diversion sections 101, one ends of the plurality of diversion sections 101 converge into a diversion inlet section 102 and are connected to the inlet 541, and the other ends of the plurality of diversion sections 101 are split into a plurality of diversion outlet sections 103; the confluence area 12 includes a plurality of confluence sections 121, one ends of the plurality of confluence sections 121 converge into a confluence outlet section 122 and are connected to the outlet 542, and the other ends of the plurality of confluence sections 121 are split into a plurality of confluence inlet sections 123; the connection area 11 includes a plurality of connection sub-areas 111, the number of the connection sub-areas 111, the diversion outlet sections 103 and the confluence inlet sections 123 are the same and are arranged one by one, the connection sub-area 111 includes a plurality of connection sections 112, one ends of the plurality of connection sections 112 are all connected to the corresponding diversion outlet sections 103, and the other ends of the plurality of connection sections 112 are all connected to the corresponding confluence inlet sections 123.

[0048] Specifically in this embodiment, the diversion area 10 includes two diversion sections 101, one end of the two diversion sections 101 converges into a diversion inlet section 102 and is connected to the inlet 541, and the other end of the two diversion sections 101 is split into three diversion outlet sections 103, which are respectively recorded as the first diversion outlet section, the second diversion outlet section and the third diversion outlet section; the confluence area 12 includes multiple confluence sections 121, one end of the two confluence sections 121 converges into a confluence outlet section 122 and is connected to the outlet 542, and the other end of the two confluence sections 121 is split into three confluence inlet sections 123, which are respectively recorded as the first confluence inlet section, the second confluence inlet section and the third confluence inlet section.

[0049] The connection area 11 includes three connection sub-areas 111, which are respectively recorded as the first connection sub-area, the second connection sub-area and the third connection sub-area. The first connection sub-area is a double-channel parallel bending arrangement. One end of the double channel of the first connection sub-area is connected to the first diversion outflow section, which is split into two channels by the first diversion outflow section for connection; the other end of the double channel of the first connection sub-area is connected to the first confluence inflow section, which is split into two channels by the first confluence inflow section for connection. The second connection sub-area is a three-channel parallel bending arrangement. One end of the three channels of the second connection sub-area is connected to the second diversion outflow section, which is split into two channels by the second diversion outflow section, and the two channels are further split into three channels for connection; the other end of the three channels of the second connection sub-area is connected to the second confluence inflow section, which is split into three channels by the second confluence inflow section for connection. The third connecting sub-area is composed of two double channels bent in parallel, one end of the two double channels of the third connecting sub-area is connected to the first diversion outflow section, which is split into two channels by the first diversion outflow section, and each channel is further split into two channels for connection; the other end of the two double channels of the third connecting sub-area is connected to the third confluence inflow section, which is split into two channels by the third confluence inflow section, and each channel is further split into two channels for connection.

[0050] A confluence section 121 may be further added as needed to connect the first confluence section, the second confluence section and the third confluence section; at the same time, the confluence section 121 of the first cooling channel 543 and the second cooling channel 544 may be connected as needed to improve the confluence effect.

[0051] The present embodiment provides a heating and cooling structure for a battery module. When the battery module 2 needs to be heated, the heating film 4 is turned on and the heat generated by the heating film 4 is directly transferred to the bottom of the battery module 2. When the battery module 2 needs to be cooled, the direct cooling plate 5 is turned on and the heat of the battery module 2 is transferred to the direct cooling plate 5 through the structural adhesive 3 and the heating film 4, and the direct cooling plate 5 takes the heat away.

[0052] Embodiment 2:

[0053] like Figure 5 As shown, this embodiment provides a battery pack system, which includes a battery module 2 and a heating and cooling structure configured on the battery module 2, and the heating and cooling structure is the heating and cooling structure provided in Example 1. The battery pack system also includes a box cover 1, a box body 7 and a protective plate 8. The box body 7 is wrapped around the battery module 2, and the box cover 1 and the protective plate 8 are respectively arranged on the top and bottom of the box body 7. The box cover 1, the box body 7 and the protective plate 8 form a closed structure, which has a good protective effect on the internal battery module 2. Specifically in this embodiment, a plurality of support members 6 are sequentially arranged on the inner wall of the protective plate 8 at intervals, and the top of the support member 6 extends to the bottom of the direct cooling plate 5, which supports and protects the direct cooling plate 5; the material of the support member 6 can be selected from foam material.

[0054] like Figure 5-Figure 6 As shown, due to the heavy weight of the battery module 2, a crossbeam structure for support is usually provided in the middle of the box body 7. In this case, the heating film 4 needs to be attached to the battery module 2, and must be provided in multiple pieces, each piece is used to fill the gap in the crossbeam structure. The area of ​​the heating film 4 is adjusted according to the size of the gap in the crossbeam structure.

[0055] Similar to the first embodiment, this embodiment provides a battery pack system. When the battery module 2 needs to be heated, the heating film 4 starts working, and the heat generated by the heating film 4 is directly transferred to the bottom of the battery module 2; when the battery module 2 needs to be cooled, the direct cooling plate 5 starts working, and the heat of the battery module 2 is transferred to the direct cooling plate 5 through the structural adhesive 3 and the heating film 4, and the direct cooling plate 5 takes the heat away.

[0056] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are 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, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A heating and cooling structure for a battery module, characterized in that: The heating and cooling structure comprises: A heating film (4) is arranged at the bottom of the battery module (2); A direct cooling plate (5) is arranged at the bottom of the heating film (4); The structural adhesive (3) extends from the surface of the battery module (2) to the surface of the direct cooling plate (5), and sequentially bonds the battery module (2), the heating film (4), and the direct cooling plate (5).

2. The heating and cooling structure of the battery module according to claim 1, characterized in that: The heating film (4) has a hollow area (41), there are a plurality of hollow areas (41), and the plurality of hollow areas (41) are arranged in sequence and at intervals.

3. The heating and cooling structure of the battery module according to claim 1, characterized in that: The structural adhesive (3) is a heat-conducting structural adhesive.

4. The heating and cooling structure of the battery module according to claim 1, characterized in that: The direct cooling plate (5) comprises a flat plate (51) and a flow channel plate (52), the flow channel plate (52) having a plurality of recessed areas (53), and the flat plate (51) enclosing the recessed areas (53) to form a cooling flow channel (54).

5. The heating and cooling structure of the battery module according to claim 4, characterized in that: The top of the flat plate (51) is provided with an installation area (55), and the installation area (55) is used to set the heating film (4).

6. The heating and cooling structure of the battery module according to claim 4, characterized in that: The cooling channel (54) comprises an inlet (541), an outlet (542), a first cooling channel (543) and a second cooling channel (544); the first cooling channel (543) and the second cooling channel (544) have the same structure and are symmetrically arranged on both sides; the first cooling channel (543) and the second cooling channel (544) both comprise a diversion area (10), a connection area (11) and a confluence area (12); the connection area (11) is connected to the inlet (541) via the diversion area (10), and the connection area (11) is connected to the outlet (542) via the confluence area (12).

7. The heating and cooling structure of the battery module according to claim 6, characterized in that: The flow diversion area (10) comprises a plurality of flow diversion sections (101), one end of the plurality of flow diversion sections (101) converges into a flow diversion inlet section (102) and is connected to the inlet (541), and the other end of the plurality of flow diversion sections (101) splits into a plurality of flow diversion outlet sections (103); The confluence area (12) comprises a plurality of confluence sections (121), one end of the plurality of confluence sections (121) converges into a confluence outflow section (122) and is connected to the outlet (542), and the other end of the plurality of confluence sections (121) is split into a plurality of confluence inflow sections (123); The connection area (11) comprises a plurality of connection sub-areas (111); the connection sub-areas (111), the diversion outflow sections (103) and the converging inflow sections (123) are of the same number and are arranged in a one-to-one correspondence; the connection sub-area (111) comprises a plurality of connection sections (112); one end of each of the plurality of connection sections (112) is connected to a corresponding diversion outflow section (103); and the other end of each of the plurality of connection sections (112) is connected to a corresponding converging inflow section (123).

8. A battery pack system, characterized in that: The battery pack system comprises a battery module (2) and a heating and cooling structure arranged on the battery module (2), and the heating and cooling structure is a heating and cooling structure as claimed in any one of claims 1 to 7.

9. The battery pack system according to claim 8, characterized in that: The battery pack system further comprises a box cover (1), a box body (7) and a protective plate (8); the box body (7) is wrapped around the battery module (2); the box cover (1) and the protective plate (8) are respectively arranged on the top and bottom of the box body (7).

10. The battery pack system according to claim 9, characterized in that: A plurality of support members (6) are sequentially arranged at intervals on the inner wall of the guard plate (8), and the top of the support member (6) extends to the bottom of the direct cooling plate (5).

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