Integrated module and battery device

Abstract

According to the integrated module and the battery device, a battery bin is arranged in a box body, no cross beam or no longitudinal beam is arranged in the battery bin, a battery cell group and a beam body are assembled to form an integral structure, and then the integrated integral structure is directly put into the battery bin; therefore, the gap between the battery cell group and the beam body can be as small as possible, the battery energy is improved, the endurance mileage of the whole vehicle is further improved, and the integration level of the battery device is also improved to a certain extent. And the beam body can also improve the structural strength of the whole box body and provide a connection point between the battery device and the vehicle body.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to an integrated module and battery device. Background Technology

[0002] Currently, battery devices typically consist of multiple cells, with N cells stacked along a predetermined direction to form a cell group, where N is an integer greater than or equal to 2. Several cell groups are assembled inside the battery device's casing. During assembly, the cell groups are placed one by one into the casing and then connected to the power supply via series and parallel busbars. To assist in the installation and fixation of the cell groups, multiple crossbeams and multiple longitudinal beams are usually fixed inside the casing. To ensure smooth assembly of the cell groups into the casing, assembly gaps are usually reserved between the crossbeams and the cell groups, and between the longitudinal beams and the cell groups. These assembly gaps occupy some space inside the casing, affecting the integration efficiency and battery energy of the battery device.

[0003] How to maximize battery energy is an important issue of concern to those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide an integrated module that can improve battery energy and battery device integration. Another purpose of this application is to provide a battery device having the above-mentioned integrated module.

[0005] This application provides an integrated module for a battery device, comprising:

[0006] At least two cell groups, each cell group comprising a plurality of cells, all the cells in the cell group being stacked along a first direction, and adjacent cell groups being bonded and fixedly connected.

[0007] At least one beam is provided, and the beam is integrated with each of the battery cell groups to form an integral structure.

[0008] In this embodiment, the battery compartment is located inside the housing. The battery compartment has no crossbeams or longitudinal beams. In this application, the battery cell assembly and beams are first assembled into a single structure, and then the integrated structure is directly placed inside the battery compartment. This minimizes the gap between the battery cell assembly and the beams, increasing battery energy and thus improving the vehicle's range. It also improves the integration of the battery device to some extent. Furthermore, the beams enhance the structural strength of the entire housing and provide connection points between the battery device and the vehicle body.

[0009] In one example, the beam extends parallel to the first direction, and the beam includes two first side surfaces arranged along a second direction, with each of the battery cells in the adjacent battery cell assembly being bonded and fixed to the first side surface.

[0010] In one example, a beam is provided between some adjacent battery cell groups, and the beam is bonded and fixed to the battery cells in the adjacent battery cell groups.

[0011] In one example, the beam has an end extending from the battery cell assembly, the end being provided with a fixing structure for fixed connection to the housing of the battery device.

[0012] In one example, a liquid cooling component is also included, the liquid cooling component having a heat exchange medium flow channel inside, and the liquid cooling component is bonded and fixed between adjacent battery cell groups;

[0013] Alternatively / and, the liquid cooling component is bonded and fixed between the beam and the adjacent battery cell assembly.

[0014] In one example, the device also includes a heat insulation plate, which is bonded and fixed between adjacent battery cell groups, or / and the heat insulation plate is bonded and fixed between the beam and the adjacent battery cell group.

[0015] In one example, the number of beams is at least two, and at least two battery cell groups are provided on one side of each beam;

[0016] Alternatively / and, an aerogel heat insulation pad is provided between adjacent cells in the same cell group.

[0017] This application embodiment also provides a battery device, including a housing with an opening, a battery compartment inside the housing, an integrated module as described in any of the above claims installed in the battery compartment, and each of the battery cells and the beam in the integrated module having a second side facing away from the opening of the housing bonded and fixed to the bottom wall of the housing.

[0018] In one example, the interior of the housing is further fixed with two fixed beams arranged along the first direction. The battery compartment is located between the two fixed beams. The end of the beam extending from the battery cell assembly is supported by the fixed beam and fixedly connected to the fixed beam.

[0019] In one example, the beam is also fixed to the bottom wall of the box by bolts.

[0020] In one example, a liquid cooling assembly is provided in the bottom wall of the enclosure, and the beam is fixedly connected to the liquid cooling assembly by bolts. Attached Figure Description

[0021] Figure 1 This is an exploded view of the battery device in one embodiment of this application;

[0022] Figure 2 for Figure 1 The structure shown is in an assembled state (top view).

[0023] Figure 3 for Figure 1 A schematic diagram of the battery cell structure shown;

[0024] Figure 4 This is a schematic diagram of the overall structure formed by assembling the battery cell assembly, beam, and liquid cooling plate in one embodiment of this application;

[0025] Figure 5 for Figure 4 A partial sectional view of the structure shown;

[0026] Figure 6 This is a schematic diagram of the overall structure formed by assembling the battery cell assembly, beam, and heat insulation board in another embodiment of this application;

[0027] Figure 7 for Figure 6 A partial sectional view of the structure shown;

[0028] Figure 8 This is an enlarged schematic diagram of the connection position between the beam and the fixed beam in one embodiment of this application;

[0029] Figure 9 This is a partial cross-sectional view of the beam and liquid cooling assembly in the XZ plane of one embodiment of this application, to show the mating position of the longitudinal beam and the liquid cooling assembly.

[0030] in, Figures 1 to 9 The one-to-one correspondence between the reference numerals and component names in the attached drawings is as follows:

[0031] 100 enclosure; 110 liquid cooling components;

[0032] 210 Liquid cooling components; 220 Heat insulation panel; 400 Adhesive layer; 500 Beam body; 600 Fixed beam;

[0033] 300 battery cell assembly; 310 battery cell; 311 terminal post; 312 pressure relief valve; 313 housing; 314 top cover; 320 busbar. Detailed Implementation

[0034] Please refer to Figures 1 to 9 , Figure 1 This is an exploded view of the battery device in one embodiment of this application; Figure 2 for Figure 1 The structure shown is in an assembled state (top view). Figure 3 for Figure 1 A schematic diagram of the battery cell structure shown; Figure 4 This is a schematic diagram of the overall structure formed by assembling the battery cell assembly, beam, and liquid cooling plate in one embodiment of this application; Figure 5 for Figure 4A partial sectional view of the structure shown; Figure 6 This is a schematic diagram of the overall structure formed by assembling the battery cell assembly, beam, and heat insulation board in another embodiment of this application; Figure 7 for Figure 6 A partial sectional view of the structure shown; Figure 8 This is an enlarged schematic diagram of the connection position between the beam and the fixed beam in one embodiment of this application; Figure 9 This is a partial cross-sectional view of the beam and liquid cooling assembly in the XZ plane of one embodiment of this application, to show the mating position of the longitudinal beam and the liquid cooling assembly.

[0035] Please refer to Figure 1 and Figure 2 This application provides a battery device, which includes a housing and a plurality of battery cells located inside the housing. The battery cells are stacked along the x-direction to form a cell group 300. Figure 1 The diagram only shows six rows of cell groups 300, and each row of cell groups 300 shows multiple cells 310. The number of cells 310 in each row of cell groups 300 is not limited to that shown in the diagram. Similarly, the interior of the housing can have one row of cell groups 300, or it can have at least N rows of cell groups 300 arranged along the y-direction. Figure 1 The image shows a three-cell pack 300.

[0036] Please combine Figure 3 Understandably, each battery cell 310 has two terminals 311, namely a positive terminal and a negative terminal. All terminals of the battery cells are connected in series or / and in parallel via bus 320 according to a set rule to form a power supply. One terminal of a battery cell 310 is electrically connected to the terminal of its adjacent battery cell 310 via bus 320. One of the two electrically connected terminals 311 can be a positive terminal and the other a negative terminal. The materials of the positive and negative terminals can be single-component materials, such as copper or aluminum, which have good conductivity, or composite materials with different components, such as copper-aluminum composite materials with good conductivity, as long as good conductivity is achieved.

[0037] In the embodiments of this application, the busbar can be made of a metal with good conductivity, such as aluminum or copper.

[0038] The battery cell can be a primary battery or a secondary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The type of battery cell is not limited to the description in this application. The battery cell can be cuboid, flat, cylindrical, or other shapes.

[0039] Please combine again Figure 3 Understandably, in this embodiment of the application, a battery cell includes a housing 313 and an electrode assembly encapsulated inside the housing. Figure 3(Not shown in the image), wherein the upper end of the housing 313 has an opening, and an upper cover plate 314 is provided at the opening. Typically, the upper cover plate 314 is installed at the opening of the housing 313 after the electrode assembly is installed inside the housing 313. For the safety of the battery cell, a pressure relief valve 312 is provided on the upper cover plate 314. When the pressure inside the housing 313 exceeds a preset pressure threshold, the high-temperature medium inside the housing 313 will rupture the pressure relief valve 312 and be ejected from the pressure relief valve 312 to the outside of the housing 313. The pressure relief valve 312 can be an elongated orifice structure. Figure 3 The diagram shows that the outer contour of the pressure relief valve 312 is an elliptical structure.

[0040] This application embodiment also provides an integrated module installed inside the housing 100 of the battery device. The integrated module includes at least two cell groups 300. Adjacent cells in the same cell group 300 can be provided with aerogel heat insulation pads. The aerogel heat insulation pads can play a role in heat insulation between adjacent cells, which can avoid the risk of thermal runaway caused by the heat of the target cell causing thermal runaway in adjacent cells and resulting in thermal propagation.

[0041] Adjacent cell groups 300 are bonded and fixed together. They can be bonded and fixed directly or indirectly.

[0042] In this embodiment, the integrated module further includes at least one beam 500, which is integrated with the battery cell assembly 300 to form an integral structure. The beam 500 can be bonded to the battery cell assembly 300 to form an integral structure, or it can be fixed to the battery cell assembly 300 by binding or snapping. There can be one or more beams 500. The battery cell assemblies 300 can be fixed together by bonding.

[0043] In this embodiment, the housing 100 contains a battery compartment without crossbeams or longitudinal beams. The battery cell assembly 300 and the beam 500 are first assembled into a single structure, which is then directly placed inside the battery compartment. This minimizes the gap between the battery cell assembly 300 and the beam 500, increasing battery energy and thus improving the vehicle's range. It also enhances the integration of the battery device to some extent. Furthermore, the beam 500 improves the structural strength of the entire housing 100 and provides a connection point between the battery device and the vehicle body.

[0044] Please refer to Figure 4In this embodiment, a beam 500 is provided between some adjacent cell groups 300, and the beam 500 is bonded and fixed to the cell in the adjacent cell group 300. In this embodiment, the extension direction of the beam 500 can be the same as the first direction, and the beam 500 extending along the first direction is also referred to as a longitudinal beam. Alternatively, the extension direction of the beam 500 can also be along the cell group arrangement direction, i.e., the y-axis direction in the figure, and the beam 500 extending along the y-axis direction is also referred to as a transverse beam.

[0045] In this embodiment, the beam 500 extends along a first direction, i.e., the beam 500 is a longitudinal beam. The beam 500 includes two first side surfaces arranged along a second direction, and the first side surfaces are bonded and fixed to the battery cells in the adjacent battery cell assembly 300. Typically, the housing 100 has spaced-apart fixed beams 600 on both sides along the first direction, and the two ends of the beam 500 can be further supported and fixed to the fixed beams 600, making the fixing of the beam 500 relatively convenient. In other words, compared to a beam 500 being a transverse beam, a beam 500 being a longitudinal beam is easier to fix.

[0046] Although this application does not show an example of beam 500 being a crossbeam, those skilled in the art can understand and implement the technical solution of the integrated component formed by beam 500 being a crossbeam based on the description herein.

[0047] Please combine Figure 2 and Figure 8 In this embodiment, the beam 500 has an end extending from the cell assembly 300, and the end is provided with a fixing structure for fixed connection with the battery device housing 100. As described above, the beam 500 can be fixedly connected to the fixing beam 600 fixedly installed in the housing 100. The fixing structure can be a through hole for mounting bolts 700, and the beam 500 and the fixing beam 600 can be fixedly connected by bolts. Of course, the fixing structure can also be a snap-fit ​​or pin structure.

[0048] The fixed beam 600 can be an expansion beam. Of course, the fixed beam 600 can also be an I-beam or other structures.

[0049] Please refer to Figure 5 In this embodiment, the integrated module includes a liquid cooling component 210. The liquid cooling component 210 has an internal heat exchange medium flow channel, and the liquid cooling component 210 is bonded and fixed between adjacent battery cell groups 300. When a hot medium is introduced into the heat exchange medium flow channel of the liquid cooling component 210, the fluid medium inside the liquid cooling component 210 can heat the battery cell. When a cold medium is introduced into the heat exchange medium flow channel of the liquid cooling component 210, the fluid medium inside the liquid cooling component 210 can cool the battery cell. In other words, the heat exchange medium inside the liquid cooling component 210 can exchange heat with the battery cell, thus ensuring that the battery cell always operates within its optimal temperature range.

[0050] The liquid cooling component 210 can be a thin plate structure, such as a harmonica tube-shaped cold plate, which is relatively thin and occupies a small area.

[0051] Of course, a liquid cooling component 210 is bonded and fixed between the beam 500 and the adjacent battery cell assembly 300. There is an adhesive layer 400 between the liquid cooling component 210 and the beam 500, and there is an adhesive layer 400 between the liquid cooling component 210 and the battery cell 310.

[0052] Please refer to 6 and Figure 7 In this embodiment, the integrated module includes a heat insulation plate 220. The heat insulation plate 220 is bonded and fixed between adjacent cell groups 300. The heat insulation plate 220 can be an epoxy board, or other high-temperature resistant plastic boards, such as polytetrafluoroethylene (PTFE). For battery devices without heat dissipation or heating requirements, the liquid cooling component 210 can be omitted from the integrated module; the heat insulation plate 220 can be used directly as the bonding plate between adjacent cell groups 310. This improves the overall strength of the integrated module, thereby giving the battery device higher structural strength.

[0053] The heat insulation plate 220 can also serve as a gap insulation, improving the working safety of the battery cell 310.

[0054] Of course, a heat insulation plate 220 can also be bonded and fixed between the beam 500 and the adjacent battery cell assembly 300 to further enhance the strength of the entire integrated module.

[0055] In this embodiment of the application, the number of beams 500 can be at least two, and at least two battery cell groups are provided on one side of each beam 500.

[0056] In this embodiment, all battery cells and beams 500 in the integrated module are bonded and fixed to the bottom wall of the box 100 on their second side away from the opening of the box 100. The fixing is simple and occupies little space.

[0057] The adhesive used for bonding in the embodiments of this application can be a structural adhesive. In particular, the adhesive used at locations requiring heat transfer can be a thermally conductive structural adhesive, such as the adhesive between the liquid cooling component 210 and the battery cell, and the adhesive between the liquid cooling component and the battery cell. This does not affect the heat transfer of the heat exchange medium between the battery cell and the heat exchange component.

[0058] To improve the stability of the integrated module installation, the beam 500 in the integrated module can also be fixed to the bottom wall of the box 100 by bolts.

[0059] Please refer to Figure 9 In the embodiment where the bottom wall of the housing 100 is equipped with a liquid cooling assembly, the beam 500 is fixedly connected to the liquid cooling assembly 110 by bolts. Figure 9Only the bolt holes 504 for mounting bolts are shown; the bolts themselves are not shown. The beam 500 is fixedly connected to the liquid cooling assembly by bolts, and the fixing structure is relatively simple.

[0060] for Figure 9 It should be noted that, Figure 9 The middle beam includes an upper wall 501, a lower wall 502, and a reinforcing rib 503. The lower wall 502 is provided with bolt holes 504 for installing bolts that are fixedly connected to the liquid cooling assembly 110.

[0061] The liquid cooling component 110 can be a plate-like structure, such as a harmonica tube, which reduces the overall height of the liquid cooling component 110. Of course, in some embodiments, the cross-section of the liquid cooling component 110 can also be other shapes, such as a circular tube, as circular tubes have lower fluid resistance. The shape of the liquid cooling component 110 depends on the specific product.

[0062] For other structural details of the battery device, please refer to the current technology; this application will not elaborate further.

[0063] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0064] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0065] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An integrated module of a battery device, characterized by, The application relates to a battery device, comprising: at least two groups of battery cells (300), each of the groups of battery cells (300) comprising a plurality of battery cells, all the battery cells in the groups of battery cells (300) being stacked along a first direction; at least one beam body (500) integrated with each of the groups of battery cells (300) to form an integral structure.

2. The integrated module of claim 1, wherein, Some of the groups of battery cells (300) are provided with the beam bodies (500), the beam bodies (500) being bonded and fixed with the battery cells in the groups of battery cells (300) adjacent to the beam bodies (500), and the other groups of battery cells (300) are bonded and fixedly connected.

3. The integrated module of claim 2, wherein, The extending direction of the beam bodies (500) is parallel to the first direction, the beam bodies (500) comprise two first side faces arranged along a second direction, and each of the first side faces is bonded and fixed with the battery cells in the group of battery cells (300) adjacent to the first side face.

4. The integrated module according to any one of claims 1 to 3, characterized in that, The beam bodies (500) have end portions extending out of the groups of battery cells (300), and the end portions are provided with fixing structures for fixedly connecting with a box (100) of the battery device.

5. The integrated module of claim 2 or 3, wherein, The application further comprises a liquid cooling component (210), the liquid cooling component (210) having a heat exchange medium flow channel in the interior, and the liquid cooling component (210) is bonded and fixed between adjacent groups of battery cells (300). Alternatively or in combination, the liquid cooling component (210) is bonded and fixed between the beam bodies (500) and the groups of battery cells (300) adjacent to the beam bodies (500).

6. The integrated module of claim 2 or 3, wherein, The application further comprises a heat insulation plate (220), the heat insulation plate (220) being bonded and fixed between adjacent groups of battery cells (300), or in combination, the heat insulation plate (220) being bonded and fixed between the beam bodies (500) and the groups of battery cells (300) adjacent to the beam bodies (500).

7. The integrated module according to any one of claims 1 to 3, characterized in that, The number of the beam bodies (500) is at least two, and at least two groups of battery cells (300) are arranged on one side of each of the beam bodies (500). Alternatively or in combination, aerogel heat insulation pads are arranged between adjacent battery cells in the same group of battery cells (300).

8. A battery device characterized by comprising: The application further comprises a box (100) having an opening, the box (100) having a battery compartment in the interior, and the integrated module of any one of claims 1 to 6 is mounted in the battery compartment, and each of the battery cells and the beam bodies (500) in the integrated module are bonded and fixed with a bottom wall of the box (100) on a second side face away from the opening of the box (100).

9. The battery device of claim 8, wherein, The interior of the box (100) is further provided with two fixing beams (600), the two fixing beams (600) are arranged along the first direction, the battery compartment is located between the two fixing beams (600), the end portions of the beam bodies (500) extending out of the groups of battery cells (300) are supported on the fixing beams (600) and fixedly connected with the fixing beams (600).

10. The battery device of claim 8, wherein, The beam bodies (500) are further fixed to the bottom wall of the box (100) through bolts. Alternatively, a liquid cooling assembly (110) is arranged in the bottom wall of the box (100), and the beam bodies (500) are fixedly connected with the liquid cooling assembly (110) through bolts.

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