Stacking structure for battery module and battery module

Abstract

The utility model belongs to the technical field of battery stacking, and particularly relates to a stacking structure for a battery module and the battery module. Wherein each layer of battery assembly comprises two columns of batteries, and one ends of each column of batteries, which are out of pole columns, are opposite to each other; a cooling assembly is arranged between every two adjacent layers of battery assemblies so as to cool each layer of battery assembly; the batteries are stacked up and down, and the narrow surface area of the batteries in the height direction is larger than the area of the opposite side of the battery pole outlet column, so that the batteries are in contact with the liquid cooling plate through the narrow surfaces in the height direction, the contact area of the batteries and the liquid cooling plate is increased, and the problem of low heat dissipation efficiency of the liquid cooling plate is solved; the upper and lower layers of batteries share one liquid cooling plate, so that the size of the liquid cooling plate is reduced, the cost is reduced, and meanwhile, the volume energy density is also improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery stacking, and in particular relates to a stacking structure for a battery module and a battery module. Background Art

[0002] Battery pack and battery module packaging technology is a key technology in the lithium battery field. Since the battery generates a large amount of heat during the charging and discharging process, in order to reduce the heat of the battery pack and prevent thermal runaway, the current mainstream solution is to install a liquid cooling plate at the bottom of the battery to reduce the temperature of the battery.

[0003] The heat dissipation solution of the liquid cooling plate usually uses a combination of end plates and steel belts to ensure that the module's external dimensions are not affected. The battery output pole side faces upward, and the other side corresponding to it contacts the liquid cooling tray. The module is assembled into the liquid cooling tray to form a PACK. However, with the above-mentioned battery stacking structure, the contact area between the battery module and the cold liquid plate is small, and the heat dissipation efficiency is not high.

[0004] Therefore, a stacking structure for a battery module and a battery module are provided to solve the technical problems in the prior art that the contact area between the battery module and the cold liquid plate is small and the heat dissipation efficiency is low. Utility Model Content

[0005] The purpose of the utility model is to provide a stacking structure for a battery module to solve the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a stacking structure for a battery module, comprising:

[0007] A multi-layer stacked battery assembly; wherein

[0008] Each layer of battery assembly includes two rows of batteries, and the terminals of each row of batteries are opposite to each other; and

[0009] A cooling assembly is provided between each two adjacent layers of battery assemblies to cool down each layer of battery assemblies.

[0010] Further, the cooling assembly comprises: a liquid cooling plate;

[0011] The liquid cooling plate is arranged between every two adjacent layers of battery assemblies and is in contact with a surface adjacent to one end of the battery output pole to reduce the battery temperature.

[0012] Furthermore, a connection assembly is provided on the outer side of the battery assembly to connect multiple layers of stacked battery assemblies.

[0013] Further, the connection component comprises:

[0014] A bottom plate connected to the lower end surface of the lowest battery assembly; and

[0015] The left and right sides of the upper end surface of the bottom plate are respectively provided with a left module end plate and a right module end plate;

[0016] The multi-layer stacked battery assembly is located between the left module end plate and the right module end plate.

[0017] Furthermore, a plurality of module fixing bars are provided on the upper end surface of the uppermost battery assembly; and

[0018] Each of the module fixing bars is connected to the two module end plates via a fixing unit.

[0019] Furthermore, the fixing unit comprises:

[0020] Screw holes are provided on the end surfaces of the two module end plates;

[0021] Positioning holes are provided at both ends of each module fixing strip; and

[0022] The bolts are adapted to cooperate with the screw holes after the positioning holes overlap with the screw holes, so as to connect the upper end surfaces of the left module end plate and the right module end plate at both ends of the module fixing strip.

[0023] Furthermore, the lower end surface of each layer of the battery assembly is provided with a plurality of limit strips;

[0024] The batteries in each layer of the battery assembly are arranged along the limiting strips.

[0025] Furthermore, every two adjacent batteries are connected via a CCS assembly.

[0026] Furthermore, a pair of copper busbar mounting bases are provided on the left and right module end plates;

[0027] A pair of copper busbar mounting bases on the left module end plate are connected via a connecting copper busbar.

[0028] On the other hand, the utility model also provides a battery module, which adopts the stacking structure as described above.

[0029] The beneficial effect of the utility model is that the utility model stacks batteries in upper and lower layers, and because the narrow surface area of ​​the battery in the height direction is larger than the area on the opposite side of the battery output pole, the battery is in contact with the liquid cooling plate through the narrow surface in the height direction, thereby increasing the contact area with the cold liquid plate and solving the problem of low heat dissipation efficiency of the liquid cooling plate.

[0030] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0034] Figure 2 It is a schematic diagram of the three-dimensional structure of the battery of the utility model;

[0035] Figure 3 It is a front view structural diagram of the left module end plate of the utility model;

[0036] Figure 4 This is a schematic diagram of the connection of one row of batteries in the lower battery assembly of the utility model;

[0037] Figure 5 It is a schematic diagram of another viewing angle of one row of batteries in the lower battery assembly of the utility model;

[0038] Figure 6 This is a schematic diagram of the lower battery assembly connection completion of the utility model;

[0039] Figure 7 It is the upper battery assembly connection of the utility model;

[0040] Figure 8 It is a battery connection diagram of the utility model.

[0041] In the figure:

[0042] 1. Battery; 2. Liquid cooling plate; 3. Foam tape; 4. Bottom plate; 5. Left module end plate; 6. Right module end plate; 7. Insulation sheet; 8. Limiting strip; 9. Module fixing strip; 10. Bolt; 11. CCS assembly; 12. Copper busbar mounting base; 13. Connecting copper busbar; 14. Through hole; 15. Total positive; 16. Total negative. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] The heat dissipation solution of the liquid cooling plate usually uses a combination of end plates and steel belts to ensure that the module's external dimensions are not affected. The battery output pole side faces upward, and the other side corresponding to it contacts the liquid cooling tray. The module is assembled into the liquid cooling tray to form a PACK. However, with the above-mentioned battery stacking structure, the contact area between the battery module and the cold liquid plate is small, and the heat dissipation efficiency is not high.

[0045] In order to solve the above technical problems, at least one embodiment provides a stacking structure for a battery module, comprising: at least two layers of battery assemblies, which are composed of a plurality of batteries 1 connected together, and a liquid cooling plate 2 is arranged between the two layers of battery assemblies to cool the battery assemblies, such as Figure 1 As shown, each layer of battery assembly includes two columns of batteries 1, and one end of the output poles of the two columns of batteries 1 is placed back to back. Since the narrow surface area in the battery height direction (i.e., the narrow surface adjacent to one side of the battery output pole) is larger than the area on the opposite side of the battery output pole, by stacking the batteries in upper and lower layers, the batteries are in contact with the liquid cooling plate through the narrow surface, thereby increasing the contact area with the liquid cooling plate and solving the problem of low heat dissipation efficiency of the liquid cooling plate. The liquid cooling plate is installed between the two layers of batteries, and the upper and lower layers of batteries share a liquid cooling plate, thereby reducing the size of the liquid cooling plate, reducing the cost, and improving the volume energy density.

[0046] For the battery assembly at the lower layer, three limit bars 8 (such as Figure 4 As shown), and structural glue is applied between the limiting strips 8, and several batteries 1 in the lower battery assembly are placed in the gaps between the limiting strips 8 in sequence, and an insulating sheet 7 is adhered to the opposite sides of the left module end plate 5 and the right module end plate 6 on the upper end surface of the bottom plate 4, and a foam tape 3 is adhered to a single large surface of the battery 1 to connect the several batteries 1 to form a battery assembly.

[0047] like Figure 8As shown, in the lower battery assembly, the cells of the first column of batteries 1 are installed alternately on the bottom plate 4 in the order of the positive pole of the first battery at the bottom and the negative pole of the adjacent battery 1 at the bottom, thereby completing the installation of the first column of batteries at the bottom, while the cells of the second column of batteries 1 are installed alternately on the bottom plate 4 in the order of the negative pole of the first battery at the bottom and the positive pole of the adjacent battery 1 at the bottom, thereby finally forming the lower battery assembly. Glue is applied to the upper surface of the lower battery assembly and a liquid cooling plate 2 is installed. Subsequently, three limit strips 8 are also attached to the upper side of the liquid cooling plate 2, and then glue is applied between the three limit strips 8. The surface of the liquid cooling plate 2 is insulated. The arrangement of each battery 1 in the upper battery assembly is the same as the connection method of the lower battery assembly. The positive pole of the first battery 1 in the first column of the upper battery assembly is at the bottom, and so on.

[0048] For CCS components (Cells Contact System, integrated busbar), connect the negative (or positive) of the first layer of batteries on the same side and the positive (or negative) of the second layer of batteries, then connect the negative (or positive) of the batteries in the same layer to the positive (or negative) of the next battery, then connect the negative (or positive) of the batteries in the second layer to the positive (or negative) of the first layer, then connect the negative (or positive) of the batteries in the same layer to the positive (or negative) of the next battery, and so on. Finally, the last battery in the second layer is connected in series to the other side by connecting the copper busbar 13 to the copper busbar mounting base 12, and the battery 1 on the other side is then connected to the total negative 16 (or total positive 15) in sequence.

[0049] The left module end plate 5 is preferably arranged on the bottom plate 4, and the right module end plate 6 is installed after the battery assemblies are installed. The right module end plate 6 has two through holes 14 for the water outlet and water inlet of the liquid cooling plate 2 to pass through (such as Figure 1 As shown), by squeezing the right module end plate 6 to a suitable position, placing the module fixing bar 9, installing three bolts 10, the module fixing bar and the left module end plate 5 and the right module end plate 6 are fixed to the bottom plate.

[0050] To summarize, by stacking batteries in upper and lower layers, and because the narrow surface area of ​​the battery in the height direction is larger than the area on the opposite side of the battery output pole, the battery is in contact with the liquid cooling plate through the narrow surface in the height direction, thereby increasing the contact area with the cold liquid plate and solving the problem of low heat dissipation efficiency of the liquid cooling plate. The liquid cooling plate is installed between the two layers of batteries, and the upper and lower layers of batteries share a liquid cooling plate, which reduces the size of the liquid cooling plate, reduces the cost, and also improves the volume energy density.

[0051] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A stacking structure for a battery module, characterized in that: include: A multi-layer stacked battery assembly; in Each layer of battery assembly includes two rows of batteries, and the terminals of each row of batteries are opposite to each other; and A cooling assembly is provided between each two adjacent layers of battery assemblies to cool down each layer of battery assemblies.

2. The stacking structure according to claim 1, characterized in that: The cooling assembly comprises: a liquid cooling plate; The liquid cooling plate is arranged between every two adjacent layers of battery assemblies and is in contact with a surface adjacent to one end of the battery output pole to reduce the battery temperature.

3. The stacking structure according to claim 2, characterized in that: A connecting assembly is arranged on the outer side of the battery assembly to connect the battery assemblies stacked in multiple layers.

4. The stacking structure according to claim 3, characterized in that: The connection component comprises: A bottom plate connected to the lower end surface of the lowest battery assembly; and The left and right sides of the upper end surface of the bottom plate are respectively provided with a left module end plate and a right module end plate; The multi-layer stacked battery assembly is located between the left module end plate and the right module end plate.

5. The stacking structure according to claim 4, characterized in that: The upper end surface of the uppermost battery assembly is provided with a plurality of module fixing bars; and Each of the module fixing bars is connected to the two module end plates via a fixing unit.

6. The stacking structure according to claim 5, characterized in that: The fixing unit comprises: Screw holes are provided on the end surfaces of the two module end plates; Positioning holes are provided at both ends of each module fixing strip; and The bolts are suitable for cooperating with the screw holes after the positioning holes overlap with the screw holes, so as to connect the upper end surfaces of the left module end plate and the right module end plate at both ends of the module fixing strip.

7. The stacking structure according to claim 6, characterized in that: The lower end surface of each layer of the battery assembly is provided with a plurality of limit strips; The batteries in each layer of the battery assembly are arranged along the limiting strips.

8. The stacking structure according to claim 7, characterized in that: Every two adjacent batteries are connected through a CCS assembly.

9. The stacking structure according to claim 8, characterized in that: A pair of copper busbar mounting bases are provided on the left and right module end plates; A pair of copper busbar mounting bases on the left module end plate are connected via a connecting copper busbar.

10. A battery module, characterized in that: include: A stacking structure as described in any one of claims 1 to 9 is adopted.

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