A lithium battery module

Abstract

This utility model relates to a lithium battery module, belonging to the field of lithium battery technology. The lithium battery module includes a single module and a pouch battery installed inside it. The single modules are arranged in a group at equal intervals. It also includes a heat dissipation mechanism, which is located on the outside of the pouch battery and is used for active and efficient heat dissipation. The heat dissipation mechanism includes a set of horizontal pipes and a set of heat-conducting plates. One side of each horizontal pipe and heat-conducting plate contacts the outside of the pouch battery. The opposite sides of two adjacent heat-conducting plates extend into the interior of the horizontal pipes. The side view of each heat-conducting plate is Z-shaped. Liquid cooling combined with multi-point heat conduction treatment improves heat dissipation efficiency and reduces heat accumulation within the module. Multi-point fixing and overall positioning of the single modules reduce displacement and improve stability and safety.

Description

Technical Field

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

[0002] Soft-pack lithium batteries, which are lithium batteries with an aluminum-plastic composite film encapsulation, are gradually expanding their market share due to their advantages such as light weight, low mold cost, and high safety.

[0003] A search revealed that the Chinese patent "A Lithium Battery Module" (authorization announcement number CN220627996U) includes multiple sequentially arranged single-piece modules. Each single-piece module has metal end plates on both sides, and multiple connecting screws connect the upper and lower ends of the modules and the two metal end plates. Each single-piece module includes a longitudinally arranged mounting frame. Each single-piece module forms a structurally stable unit structure through the mounting frame. The multiple single-piece modules and the metal end plates on both sides form a stable module structure through the connecting screws at the upper and lower ends, significantly improving the structural strength and stability of the lithium battery module and increasing its safety factor.

[0004] However, the above method has the following drawbacks in actual use: the passive heat dissipation method of attaching the aluminum plate to the outside of the battery with heat dissipation gaps is prone to heat accumulation at the junction of the aluminum plate, foam board and battery, and cannot be dissipated in time, which can easily cause overheating. The installation method limits multiple single modules by only a single axial screw. After long-term use or accidental impact, the screw connection end becomes loose, and multiple single modules will be misaligned, resulting in poor module stability and safety. Utility Model Content

[0005] Therefore, it is necessary to provide a lithium battery module that addresses the issues of low heat dissipation efficiency, easy heat accumulation, module stability, and safety.

[0006] A lithium battery module includes a single module and a pouch battery installed inside it, wherein the single modules are arranged in a group at equal intervals; it also includes a heat dissipation mechanism, which is arranged in a group and disposed on the outside of the pouch battery for active and efficient heat dissipation of the pouch battery; wherein the heat dissipation mechanism includes a group of horizontal pipes and a group of heat-conducting plates, one side of each horizontal pipe and heat-conducting plate is in contact with the outside of the pouch battery, and the opposite sides of two adjacent heat-conducting plates extend into the interior of the horizontal pipes, and the side view cross-section of each heat-conducting plate is Z-shaped.

[0007] In one embodiment, the cross-section of the horizontal tube is rectangular, the horizontal tube is made of aluminum, and the heat-conducting plate is made of copper.

[0008] In one embodiment, the single-piece module has four vertical pipes inside, the end of the horizontal pipe is connected to the corresponding vertical pipe, and a T-junction is provided between two adjacent vertical pipes.

[0009] In one embodiment, one of the tee pipes is connected to the riser at a position higher than the horizontal position of the top horizontal pipe, while the other tee pipe is connected to the riser at a position lower than the horizontal position of the bottom horizontal pipe.

[0010] In one embodiment, a base is provided on the outside of a group of pouch batteries, one side of the single module is inserted into the interior of the base, and a top cover is installed on the single module by bolts.

[0011] In one embodiment, the top of the base is provided with two retaining plates, and two screws are provided between the two retaining plates, which pass through multiple top covers in sequence. A rubber sleeve is provided between two adjacent top covers and fitted onto the outside of the screws.

[0012] In one embodiment, the base has two cavities inside, and two conduits connected to the corresponding cavities are installed on the base.

[0013] In one embodiment, a set of connecting pipes is provided on the base, and the connecting pipes are connected to the tee pipe by clamps. Beneficial effects

[0014] 1. By setting up multi-point horizontal pipes, multi-range liquid cooling treatment is carried out for the battery, and the heat dissipation points are more comprehensive. In this process, the heat generated by the battery is transferred to the coolant in combination with the heat conduction plate, and the remainder is distributed to the outside, completing the active heat dissipation treatment, improving heat dissipation efficiency, and reducing the phenomenon of heat accumulation in the module.

[0015] 2. By setting up a base, the single-piece modules are separated and supported. With the help of clamps, fixed points are formed between the tee pipe and the connecting pipe. Furthermore, the use of clamping plates and screws to limit the overall positioning of multiple single-piece modules effectively reduces the occurrence of displacement and improves the stability and safety during use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0019] Figure 3 This is a schematic diagram of the structure of the single-chip module and the soft-pack battery of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the horizontal tube and heat-conducting plate of this utility model;

[0021] Figure 5 This is a schematic diagram of the base and connecting pipe of this utility model.

[0022] Figure label:

[0023] 100. Single-piece module; 110. Riser; 111. T-joint; 112. Connecting pipe; 120. Top cover; 200. Soft-pack battery; 210. Base; 300. Heat dissipation mechanism; 310. Horizontal pipe; 320. Heat-conducting plate. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] The following is combined Figures 1-5 This invention describes a lithium battery module.

[0026] In one embodiment, a lithium battery module includes a single module 100 and a pouch battery 200 installed inside it. The single modules 100 are arranged in a group and are equidistant from each other. The module also includes a heat dissipation mechanism 300, which is arranged in a group and is disposed on the outside of the pouch battery 200 for active and efficient heat dissipation of the pouch battery 200. The heat dissipation mechanism 300 includes a group of horizontal pipes 310 and a group of heat-conducting plates 320. One side of the horizontal pipes 310 and the heat-conducting plates 320 are in contact with the outside of the pouch battery 200. The opposite sides of two adjacent heat-conducting plates 320 extend into the interior of the horizontal pipes 310. The side view cross-section of the heat-conducting plates 320 is Z-shaped.

[0027] like Figure 4 As shown, the cross-section of the horizontal tube 310 is rectangular, the material of the horizontal tube 310 is aluminum, and the material of the heat-conducting plate 320 is copper.

[0028] In this embodiment, when the battery module is in use, the coolant can be driven to flow, so that the coolant in the horizontal tube 310 can carry away the heat generated by the pouch battery 200. The rectangular cross-section is used to increase the contact area with the pouch battery 200 area, and the aluminum material is used to improve the heat dissipation effect. At the same time, the heat conduction plate 320 absorbs the heat on the pouch battery 200 and transfers it to the coolant to complete the auxiliary heat dissipation. During this transfer process, since it is set in a Z-shape, some heat will be dissipated to the outside at its corners, reducing the heat dissipation pressure of the coolant.

[0029] It should be noted that the single-piece module 100 and the horizontal tube 310 are pre-produced and assembled. The soft-pack battery 200 can be directly inserted from above the single-piece module 100. Foam plates for cushioning are provided on both sides of the soft-pack battery 200.

[0030] Heat dissipation notches are provided on both sides of the single-piece module 100, so that the horizontal area of ​​the opening forms an air flow channel in the module, which facilitates the discharge of heat dissipated by the heat conduction plate 320 to the outside. The coolant in the horizontal tube 310 is in a continuous flow state, so the outer area of ​​the horizontal tube 310 is in a low temperature state, which can also quickly eliminate the heat dissipated by the heat conduction plate 320 and further utilize the cold source.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the single-piece module 100 has four vertical pipes 110 inside, the end of the horizontal pipe 310 is connected to the corresponding vertical pipe 110, and a T-shaped pipe 111 is provided between two adjacent vertical pipes 110.

[0032] The corresponding riser 110 is used to complete the diversion of coolant during introduction and the convergence of coolant during discharge, reducing the occurrence of poor coolant flow.

[0033] like Figure 3 As shown, the connection point of one of the T-pipes 111 and the riser 110 is higher than the horizontal position of the top horizontal pipe 310, while the connection point of the remaining T-pipe 111 and the riser 110 is lower than the horizontal position of the bottom horizontal pipe 310.

[0034] During the liquid cooling process, the coolant is introduced from the lower part and discharged from the higher part, which can effectively fill the entire horizontal tube 310 with coolant and ensure the liquid cooling effect.

[0035] It should be noted that this liquid cooling method, compared with the traditional liquid cooling plate method, improves the utilization efficiency of the coolant and the contact area between the cold source and the battery area.

[0036] like Figure 1 , Figure 2 and Figure 3As shown, a base 210 is provided on the outside of a set of soft-pack batteries 200, and one side of the single module 100 is inserted into the interior of the base 210. A top cover 120 is installed on the single module 100 by bolts.

[0037] Multiple single-piece modules 100 are installed separately using the base 210 to form an individual fixed treatment, reducing mutual interference between single-piece modules 100. The top cover 120 is designed to facilitate docking with the single-piece modules 100 and also provides convenience for subsequent overall positioning.

[0038] It should be noted that the top cover 120 is provided with a corresponding number of connecting copper busbars that can be connected to the soft-pack battery 200, and positive and negative terminal plates are provided on the outside of the connecting copper busbars.

[0039] The specifications and quantity of the connecting copper busbars can be selected according to the usage requirements.

[0040] like Figure 1 and Figure 2 As shown, the base 210 has two clamping plates on its top, and two screws that pass through multiple top covers 120 sequentially are arranged between the two clamping plates. A rubber sleeve is provided between two adjacent top covers 120 and fitted onto the outside of the screws.

[0041] The system uses a combination of a clamping plate and screws to achieve overall positioning of multiple top covers 120 and multiple single modules 100. With the addition of rubber sleeves, the system can provide cushioning during battery module vibration, thereby improving the stability of the battery module.

[0042] It should be noted that a locking nut is provided at the end of the screw that contacts the outside of the clamping plate.

[0043] like Figure 1 and Figure 5 As shown, the base 210 has two cavities inside, and two conduits connected to the corresponding cavities are installed on the base 210.

[0044] Two conduits are used, each corresponding to the inlet and outlet pipes of the coolant, which is then delivered to one of the cavities. After liquid cooling, the coolant flows into the other cavity.

[0045] It should be noted that the cavity is used to receive and contain the coolant during the transportation process;

[0046] The pipelines, pumps, and heat exchangers used in the liquid cooling operation are all located in suitable positions outside the base 210. The internal structure and application of this liquid cooling process are existing mature technologies and will not be described in detail here.

[0047] like Figure 1 and Figure 5As shown, a set of connecting pipes 112 are provided on the base 210, and the connecting pipes 112 are connected to the tee pipes 111 by clamps.

[0048] The connection between the tee pipe 111 and the connecting pipe 112 is completed by using clamps, which facilitates the flow of coolant. At the same time, the connection point forms a fixed point for the single-piece module 100, which further improves the stability of the single-piece module 100.

[0049] Working principle: Select the base 210 of the corresponding specification, then install multiple single-piece modules 100 onto the base 210 in sequence. Next, place the soft-pack battery 200 between two adjacent foam boards. Then, the user installs the top cover 120 with bolts and uses clamps to connect the corresponding end of the connecting pipe 112 to the end of the three-way pipe 111. Then, wrap the two clamps around the outside of the multiple single-piece modules 100 and use nuts to connect with the screws passing through the top cover 120 to complete the overall positioning. Then, install the battery module into the corresponding area and connect the corresponding pipe on the liquid cooling mechanism to the corresponding conduit on the base 210.

[0050] It should be noted that mounting ears can be added to the outside of the base 210 or the card plate, and the installation position of the mounting ears can be selected according to actual needs.

[0051] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lithium battery module, characterized in that, include: The single-cell module (100) and the soft-pack battery (200) installed inside it, wherein the number of single-cell modules (100) is one group and they are arranged at equal distances; It also includes a heat dissipation mechanism (300), the number of which is a set, the heat dissipation mechanism (300) is disposed on the outside of the soft pack battery (200) and is used to actively and efficiently dissipate heat from the soft pack battery (200); The heat dissipation mechanism (300) includes a set of horizontal tubes (310) and a set of heat-conducting plates (320). One side of both the horizontal tubes (310) and the heat-conducting plates (320) is in contact with the outside of the soft-pack battery (200). The opposite sides of two adjacent heat-conducting plates (320) extend into the interior of the horizontal tubes (310). The side view cross section of the heat-conducting plates (320) is Z-shaped.

2. The lithium battery module according to claim 1, characterized in that, The horizontal tube (310) has a rectangular cross-section and is made of aluminum. The heat-conducting plate (320) is made of copper.

3. The lithium battery module according to claim 1, characterized in that, The single-piece module (100) has four vertical pipes (110) inside. The end of the horizontal pipe (310) is connected to the corresponding vertical pipe (110). A three-way pipe (111) is provided between two adjacent vertical pipes (110).

4. The lithium battery module according to claim 3, characterized in that, One of the three-way pipes (111) is connected to the riser (110) at a position higher than the horizontal position of the top horizontal pipe (310), while the other three-way pipe (111) is connected to the riser (110) at a position lower than the horizontal position of the bottom horizontal pipe (310).

5. The lithium battery module according to claim 3, characterized in that, A base (210) is provided on the outside of a set of the soft-pack batteries (200), and one side of the single-cell module (100) is inserted into the interior of the base (210). A top cover (120) is installed on the single-cell module (100) by bolts.

6. The lithium battery module according to claim 5, characterized in that, The base (210) has two clamping plates on its top, and two screws that pass through multiple top covers (120) in sequence are arranged between the two clamping plates. A rubber sleeve is provided between two adjacent top covers (120) and fitted onto the outside of the screws.

7. The lithium battery module according to claim 5, characterized in that, The base (210) has two cavities inside, and two conduits connected to the corresponding cavities are installed on the base (210).

8. The lithium battery module according to claim 5, characterized in that, A set of connecting pipes (112) is provided on the base (210), and the connecting pipes (112) are connected to the tee pipes (111) by clamps.

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