Battery cell module, liquid-cooled battery pack, and device

Abstract

The utility model discloses a kind of battery cell module, liquid-cooled battery pack and equipment, battery cell module includes multiple side plates, multiple end plates and multiple battery cells, multiple side plates and multiple end plates are vertically arranged, multiple side plates are mutually parallel and are spaced distribution along the direction perpendicular to side plate, two ends between any two adjacent side plates are respectively provided with end plate, to jointly enclose and form a battery cell containing area, multiple battery cells are sequentially placed in each battery cell containing area along the length direction of side plate, the periphery of battery cell is filled with adhesive layer, to glue joint in battery cell containing area, so it can be formed by side plate and end plate enclosure frame type battery cell containing area, then battery cell is adhered in battery cell containing area by adhesive layer, for each battery cell, its periphery is respectively adhered with adjacent battery cell and side plate, and two battery cells located at outermost end in each battery cell containing area are also adhered with end plate, so that battery cell is assembled simply in whole battery cell module, and the strength of assembly is high.

Description

Technical Field

[0001] This utility model belongs to the field of battery pack technology, and in particular relates to a cell module, a liquid-cooled battery pack and equipment. Background Technology

[0002] With the continuous development of the lithium battery energy storage industry, the size of battery packs is getting larger and larger, resulting in complex internal structures and higher costs. Currently, traditional energy storage boxes use steel straps to bundle the cells into multiple modules and then fix them in the lower box. This results in relatively weak connection strength between the cells. To ensure the overall strength of the battery pack, the lower box is usually designed as a frame. By increasing the strength of the lower box, the overall strength of the battery pack is enhanced. Although this solution meets the overall structural strength requirements, it is costly and has a complex internal structure with low space utilization. Utility Model Content

[0003] To solve the above-mentioned technical problems, one of the objectives of this utility model is to provide a battery cell module with a simple structure, low assembly cost, and high battery cell assembly strength.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A battery cell module includes multiple side plates, multiple end plates, and multiple battery cells. The multiple side plates and multiple end plates are all vertically arranged. The multiple side plates are parallel to each other and spaced apart in a direction perpendicular to the side plates. End plates are respectively provided at both ends between any two adjacent side plates to jointly enclose a battery cell receiving area. Multiple battery cells are arranged sequentially along the length direction of the side plate in each battery cell receiving area. Each battery cell is surrounded by an adhesive layer to bond the battery cell to the battery cell receiving area.

[0005] The beneficial effects of the above technical solution are as follows: a frame-like cell housing area can be formed by enclosing the side plates and end plates, and the cell can be bonded to the cell housing area with an adhesive layer. For each cell, its outer periphery is bonded to the adjacent cell and the side plate respectively, and the two outermost cells in each cell housing area are also bonded to the end plate. This makes the assembly of the cell in the entire cell module simple and the assembly strength high.

[0006] The side plate described in the above technical solution is an insulating plate.

[0007] The beneficial effect of the above technical solution is that it can improve the safety of the entire battery cell module.

[0008] The side panel described in the above technical solution is a rigid plastic plate or a metal plate covered with an insulating layer.

[0009] The advantages of the above technical solution are that it has high structural strength and ensures that the insulation performance between the cells in the battery pack meets the requirements.

[0010] In the above technical solution, the end plate and / or side plate corresponding to one side of the cell housing area are non-smooth surfaces.

[0011] The beneficial effect of the above technical solution is that it makes the adhesive layer bonded to the side plate and / or end plate stronger, and avoids the adhesive layer peeling off due to the smooth inner surface of the side plate and / or end plate.

[0012] The above technical solution also includes a CCS component, through which multiple battery cells are connected in series or in parallel.

[0013] The beneficial effect of the above technical solution is that it enables multiple cells to be connected in series or in parallel through CCS components for energy storage or external power supply.

[0014] The second objective of this utility model is to provide a liquid-cooled battery pack with a simple structure and high cell installation strength.

[0015] To achieve the above objectives, another technical solution of this utility model is as follows: a liquid-cooled battery pack, including a base plate assembly and a cell module as described above, wherein the base plate assembly is horizontally arranged and the cell module is installed on the upper end of the base plate assembly.

[0016] The beneficial effect of the above technical solution is that the entire cell module is directly assembled on the base plate assembly. At this time, the base plate assembly can support each cell, avoiding the adhesive layer from bearing the weight of the cell, which would reduce the durability of the cell module.

[0017] The base plate assembly described in the above technical solution includes a liquid cooling plate, which is horizontally arranged, and the battery cell module is installed on the upper end of the liquid cooling plate.

[0018] The beneficial effect of the above technical solution is that the liquid cooling plate can support the battery cell module, and at the same time, the liquid cooling plate can cool down each battery cell, thus avoiding thermal runaway of the entire battery cell module.

[0019] The base plate assembly described in the above technical solution also includes a mounting beam disposed on the upper end of the liquid cooling plate. At least two mounting beams are provided. Both ends of the battery cell module are respectively supported on the mounting beams, and multiple end plates at the same end are connected to the corresponding mounting beams.

[0020] The beneficial effect of the above technical solution is that it enables the battery cell module to be connected to the mounting beam through the end plates at both ends, and ultimately achieves the fixed installation of the battery cell module on the top of the base plate assembly.

[0021] The base plate assembly described in the above technical solution also includes multiple base plates and multiple supporting beams. The multiple base plates are distributed parallel to each other in a horizontal plane. The multiple supporting beams are installed on the upper ends of the multiple base plates, and each supporting beam is intersected and connected to the multiple base plates. The liquid cooling plate is installed on the multiple supporting beams.

[0022] The beneficial effects of the above technical solution are that it enables the entire base plate assembly to have better support performance, and both ends of each base plate can form installation points for connection with the support carrier.

[0023] The third objective of this utility model is to provide a device with a simple structure and high cell installation strength.

[0024] To achieve the above objectives, another technical solution of this utility model is as follows: a device comprising a liquid-cooled battery pack as described above.

[0025] The advantages of the above technical solution are: the equipment has a simple structure and relatively low cost, and the battery cell assembly strength in its battery cell module is high. Attached Figure Description

[0026] Figure 1 This is an elevation view of the battery cell module described in Embodiment 1 of this utility model; Figure 2 This is a top view of the side plate, end plate, and battery cell assembled as described in Embodiment 1 of this utility model; Figure 3 This is a top view of the side plate and end plate assembled as described in Embodiment 1 of this utility model; Figure 4 This is a top view of the side plate and end plate separated as described in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram showing the interaction between the adhesive layer and multiple battery cells in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the adhesive layer structure described in Embodiment 1 of this utility model; Figure 7 This is an elevation view of the liquid-cooled battery pack described in Embodiment 2 of this utility model; Figure 8 This is an exploded view of the base plate assembly described in Embodiment 2 of this utility model; Figure 9 This is an elevation view of the liquid-cooled battery pack described in Embodiment 2 of this utility model from another perspective.

[0027] In the diagram: 1. Battery cell module; 11. Side plate; 12. End plate; 13. Battery cell; 14. Battery cell housing area; 15. Adhesive layer; 16. CCS assembly; 2. Base plate assembly; 21. Liquid cooling plate; 22. Mounting beam; 22a. First mounting beam; 22b. Second mounting beam; 22c. Third mounting beam; 23. Bottom protective plate; 231. Connecting hole; 24. Support beam; 3. Fuse; 4. BMS system; 5. Fire detector. Detailed Implementation

[0028] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0030] It is understood that spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as “below,” “below,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0031] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0032] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0033] Example 1 like Figures 2-6 As shown, this embodiment provides a battery cell module, including multiple side plates 11, multiple end plates 12, and multiple battery cells 13. The multiple side plates 11 and multiple end plates 12 are all vertically arranged. The multiple side plates 11 are parallel to each other and spaced apart in a direction perpendicular to the side plates 11. End plates 12 are respectively provided at both ends between any two adjacent side plates 11 to jointly enclose a battery cell receiving area 14. Multiple battery cells 13 are arranged sequentially in each battery cell receiving area 14 along the length direction of the side plate 11. Each battery cell 13 is surrounded by an adhesive layer 15 to bond the battery cell 13 to the battery cell receiving area 14. In this way, a frame-like cell housing area can be formed by enclosing the side plates and end plates. The cells are then bonded to the cell housing area with an adhesive layer. For each cell, its outer periphery is bonded to the adjacent cells and the side plates respectively. The two outermost cells in each cell housing area are also bonded to the end plates. This makes the assembly of cells in the entire cell module simple and the assembly strength high.

[0034] like Figures 2-4 As shown, in this embodiment, the side plate is set along the front-to-back direction, while the end plate is set along the left-to-right direction. In this embodiment, both the side plate and the end plate are set vertically, and the two ends of each end plate are vertically connected to the two corresponding side plates (wherein, the end plate and the side plate can be connected by riveting, specifically by using blind rivets). At this time, the two adjacent side plates and the two corresponding end plates enclose a square cell housing area.

[0035] Preferred, such as Figures 2-4 As shown, in this embodiment, the two ends of the multiple side plates are flush, and the spacing between any two adjacent side plates is consistent. The multiple end plates located at the same end of the multiple side plates are coplanarly distributed, and the size and specifications of each cell accommodating area are consistent.

[0036] like Figures 2-6As shown, the battery cell in this embodiment is cuboid in shape, and multiple battery cells can be placed along the length of its side plate in each battery cell housing area. A certain gap is reserved around each battery cell to facilitate the injection of adhesive (for a single battery cell housing area, a gap needs to be reserved between two adjacent battery cells, a gap also needs to be reserved between the battery cell and the side plate, and a gap also needs to be reserved between the two outermost battery cells and the end plate) so that the adhesive layer can be formed after curing.

[0037] In this embodiment, for each cell, the gap width for injecting the adhesive layer on its outer periphery is preferably 0.5-1cm.

[0038] In the above technical solution, the side plate 11 is an insulating plate, which improves the safety of the entire battery cell module. In this embodiment, the end plate can be made of die-cast or extruded sheet material (steel plate, aluminum plate, or aluminum alloy plate). The main reason for using a metal plate for the end plate is that it will later serve as the main load-bearing component connected to the base plate assembly. To further improve the safety of the battery cell module, an insulating layer can be wrapped around the end plate.

[0039] The side plate 11 in the above technical solution is a rigid plastic plate (such as an epoxy resin plate with high strength) or a metal plate (such as a steel plate, aluminum plate or aluminum alloy plate) covered with an insulating layer. It has high structural strength and ensures that the insulation performance between the cells in the battery pack meets the requirements.

[0040] In this embodiment, the insulating layer can be an insulating coating (such as insulating varnish or insulating ceramic coating) or a layer of insulating skin (such as insulating rubber or insulating silicone) directly wrapped on the outside.

[0041] In this embodiment, the adhesive layer can be made of a structural adhesive with high strength (such as polyurethane structural adhesive or epoxy resin structural adhesive, preferably polyurethane structural adhesive).

[0042] In the above technical solution, the end plate 12 and / or side plate 11 have a non-smooth surface on one side of the cell housing area 14. This results in a higher bonding strength between the adhesive layer and the side plate and / or end plate, preventing the adhesive layer from peeling off due to the smooth inner surface of the side plate and / or end plate.

[0043] Preferably, the side surfaces of the end plates and side plates corresponding to the cell receiving area 14 are non-smooth surfaces, which increases the bonding strength between the adhesive layer and the end plates and side plates. For multiple cells within a single cell receiving area, the adhesive layers on their outer peripheries are all connected as one unit. If the side surfaces of the end plates and side plates corresponding to the cell receiving area are smooth, it would be detrimental to the adhesion of the adhesive layer. Since the adhesive layer bears the weight of multiple cells, over time, the adhesive layer is prone to peeling off from the end plates and side plates. Therefore, in this embodiment, it is necessary to set the side surfaces of the end plates and side plates corresponding to the cell receiving area as non-smooth surfaces.

[0044] Specifically, the end plate and side plate can each have numerous grooves and / or grooves evenly distributed on one side of the cell housing area to form a non-smooth surface (of course, it is better if the end plate and side plate are honeycomb-shaped on one side of the cell housing area). As for the adhesive layer, it will extend into the grooves or grooves before curing, and after curing, it can achieve not only bonding with the side plate and end plate, but also interlocking connection, thereby improving the connection strength between the adhesive layer and the side plate and end plate.

[0045] Similarly, the outer peripheral wall of the battery cell can also be a non-smooth surface, which makes the bonding effect between the battery cell and the adhesive layer better (the outer peripheral wall of the battery cell can also be evenly distributed with grooves or recesses, or it can be directly honeycomb-shaped).

[0046] like Figure 1 As shown, the above technical solution also includes a CCS module 16, through which multiple battery cells 13 are connected in series or parallel. This allows multiple battery cells to be connected in series or parallel via the CCS module for energy storage or external power supply. The CCS module (i.e., the cell connection system) has devices such as busbars, enabling series or parallel connection between battery cells, and also allowing electrical connection with the battery pack's BMS (Battery Management System). The CCS module 16 is prior art and will not be described in detail here.

[0047] In this embodiment, for the battery cell module, the multiple end plates at the same end can also be integrally formed.

[0048] In this embodiment, the number of side plates is n, where n is a positive integer between 3 and 10. At this time, the number of cell accommodating areas is n-1, and the number of cells accommodating each cell accommodating area can be no less than 3.

[0049] Example 2 like Figure 7 As shown, this embodiment provides a liquid-cooled battery pack, including a base plate assembly 2 and a cell module 1 as described in Embodiment 1. The base plate assembly 2 is horizontally arranged, and the cell module 1 is mounted on the upper end of the base plate assembly 2. This allows the entire cell module to be directly assembled onto the base plate assembly, whereby the base plate assembly can support each cell, preventing the adhesive layer from bearing the weight of the cell and thus reducing the durability of the cell module.

[0050] In this embodiment, the base plate assembly is equivalent to the lower housing of the battery pack, and its main function is to support the bottom. For the cell module provided in Embodiment 1, its multiple side plates and multiple end plates realize the binding of the cell's periphery. Although the cell is bonded to the side plates and end plates through an adhesive layer, the load-bearing capacity of the adhesive layer is limited. Therefore, the base plate assembly is still needed to provide overall support. Given that the cell module is generally cuboid, the base plate assembly can also be a square structure that matches the base plate of the cell module.

[0051] like Figure 8 and Figure 9 As shown, the base plate assembly 2 in the above technical solution includes a liquid cooling plate 21, which is horizontally arranged, and the battery cell module 1 is mounted on the upper end of the liquid cooling plate 21. In this way, the liquid cooling plate can support the battery cell module, and at the same time, the liquid cooling plate can cool down each battery cell, avoiding thermal runaway of the entire battery cell module.

[0052] The liquid cooling plate is crucial to the entire base plate assembly. In this embodiment, the liquid cooling plate is a square plate with cooling channels (which can be evenly distributed in a wavy pattern within the liquid cooling plate). The liquid cooling plate also has inlet and outlet ports that communicate with the cooling channels (the inlet and outlet ports facilitate the circulation of coolant within the liquid cooling plate; this is prior art and will not be elaborated upon here). In this embodiment, the lower end of the battery cell preferably protrudes beyond the lower end of the battery cell housing area. This ensures that when the battery cell module is mounted on the liquid cooling plate, the lower end of each battery cell can contact the liquid cooling plate, allowing the liquid cooling plate to directly cool the battery cell.

[0053] like Figure 8 As shown, the base plate assembly 2 in the above technical solution also includes mounting beams 22 disposed on the upper end of the liquid cooling plate 21. At least two mounting beams 22 are provided, and both ends of the battery cell module 1 are respectively supported on the mounting beams 22. Multiple end plates 12 at the same end are connected to the corresponding mounting beams 22. This allows the battery cell module to be connected to the mounting beams through its end plates, ultimately achieving a fixed installation of the battery cell module on the upper end of the base plate assembly.

[0054] Preferred, such as Figure 8 and Figure 9As shown, there can be three mounting beams 22. These three mounting beams are arranged parallel to each other at the upper end of the liquid cooling plate, and the length direction of the mounting beams is perpendicular to the length direction of the side plate. The three mounting beams are designated as a first mounting beam 22a, a second mounting beam 22b, and a third mounting beam 22c. The first mounting beam 22a is located at one end of the upper part of the liquid cooling plate, while the second mounting beam 22b and the third mounting beam 22c are located at the other end of the upper part of the liquid cooling plate. The second mounting beam 22b and the third mounting beam 22c are close to each other, and the second mounting beam 22b is located at the... Between the first mounting beam 22a and the third mounting beam 22c, the end plates at both ends of the cell module can be connected to the first mounting beam 22a and the second mounting beam 22b respectively (the connection can be made by bolts and nuts or by direct welding). The third mounting beam 22c is used to install some auxiliary modules (such as fuses 3, BMS system 4, fire detectors 5, etc., which are all conventional devices in the field of battery pack technology. In this embodiment, only their installation positions are optimized, so they will not be described in detail here). This greatly improves the convenience of maintenance of the liquid-cooled battery pack.

[0055] like Figure 8 and Figure 9 As shown, the base plate assembly 2 in the above technical solution also includes multiple base guard plates 23 and multiple supporting beams 24. The multiple base guard plates 23 are distributed parallel to each other in the horizontal plane at intervals. The multiple supporting beams 24 are installed on the upper ends of the multiple base guard plates 23, and each supporting beam 24 is intersected and connected to the multiple base guard plates 23. The liquid cooling plate 21 is installed on the multiple supporting beams 24. This makes the entire base plate assembly have better support performance. The two outermost base guard plates 23 have multiple spaced connection holes 231 along their length direction. The connection holes 231 are used to connect with the support carrier (the connection holes allow bolts or rivets to pass through to connect with the support carrier). When this liquid-cooled battery pack is applied to a new energy vehicle, the support carrier is the vehicle chassis.

[0056] Preferably, there are 3-10 bottom protective plates, and the spacing between two adjacent bottom protective plates can be 10-20cm.

[0057] like Figure 8 and Figure 9As shown, in this embodiment, both the bottom protective plate and the supporting beam are straight strips. Multiple bottom protective plates are horizontally arranged and spaced apart along the length direction of the side plates (the length direction of the bottom protective plate is perpendicular to the length direction of the side plates). Only two supporting beams are provided. In this case, both supporting beams are horizontally arranged and their length direction is perpendicular to the length direction of the bottom protective plate. The two supporting beams are located at both ends of the multiple bottom protective plates (at this time, the two supporting beams and the multiple bottom protective plates are connected in a shape similar to a ladder). In this embodiment, the liquid cooling plate is directly installed on the two supporting beams. In this embodiment, each cell housing area is located between the two supporting beams, so that each cell can sink down to contact the upper end of the liquid cooling plate.

[0058] In this embodiment, the mounting beam can be welded or riveted to the liquid cooling plate, the supporting beam can be welded or riveted to the bottom protective plate, and the liquid cooling plate can be welded or riveted to the supporting beam.

[0059] Example 3 This embodiment provides a device including a liquid-cooled battery pack as described in Embodiment 2. The device has a simple structure and relatively low cost, and its cell assembly strength within the cell module is high.

[0060] Of course, the device can be an energy storage station or a means of transportation, such as a new energy vehicle (car, commercial vehicle or passenger vehicle) or a ship.

[0061] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery cell module, characterized in that, It includes multiple side plates (11), multiple end plates (12) and multiple battery cells (13). The multiple side plates (11) and multiple end plates (12) are all arranged vertically. The multiple side plates (11) are parallel to each other and distributed at intervals along a direction perpendicular to the side plates (11). End plates (12) are respectively provided at both ends between any two adjacent side plates (11) to jointly enclose a battery cell receiving area (14). Multiple battery cells (13) are arranged sequentially along the length direction of the side plate (11) in each battery cell receiving area (14). Each battery cell (13) is surrounded by an adhesive layer (15) to glue the battery cell (13) into the battery cell receiving area (14).

2. The battery cell module according to claim 1, characterized in that, The side plate (11) is an insulating plate.

3. The cell module according to claim 2, characterized in that, The side plate (11) is a rigid plastic plate or a metal plate covered with an insulating layer.

4. The battery cell module according to claim 1, characterized in that, The end plate (12) and / or side plate (11) are non-smooth surfaces on one side of the cell housing area (14).

5. The battery cell module according to claim 1, characterized in that, It also includes a CCS component (16), through which multiple cells (13) are connected in series or in parallel.

6. A liquid-cooled battery pack, characterized in that, It includes a base plate assembly (2) and a cell module (1) as described in any one of claims 1-5, wherein the base plate assembly (2) is horizontally arranged and the cell module (1) is mounted on the upper end of the base plate assembly (2).

7. The liquid-cooled battery pack according to claim 6, characterized in that, The base plate assembly (2) includes a liquid cooling plate (21), which is horizontally arranged, and the battery cell module (1) is installed on the upper end of the liquid cooling plate (21).

8. The liquid-cooled battery pack according to claim 7, characterized in that, The base plate assembly (2) also includes a mounting beam (22) disposed on the upper end of the liquid cooling plate (21). There are at least two mounting beams (22). The two ends of the battery cell module (1) are respectively supported on the mounting beams (22). Multiple end plates (12) at the same end are connected to the corresponding mounting beams (22).

9. The liquid-cooled battery pack according to claim 7, characterized in that, The base plate assembly (2) also includes multiple base plates (23) and multiple supporting beams (24). The multiple base plates (23) are distributed parallel to each other in the horizontal plane. The multiple supporting beams (24) are installed on the upper end of the multiple base plates (23). Each supporting beam (24) is intersected with and connected to the multiple base plates (23). The liquid cooling plate (21) is installed on the multiple supporting beams (24).

10. A device, characterized in that, Including the liquid-cooled battery pack as described in any one of claims 6-9.

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