Square case battery cell integrated module
By setting a liquid cooling layer in close contact with the cell assembly in the prismatic cell system, a coolant circuit is formed, which solves the problems of heat dissipation difficulty and low space utilization, and achieves efficient space utilization and heat dissipation effect inside the battery box.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI GANFENG BATTERY TECH
- Filing Date
- 2025-04-28
- Publication Date
- 2026-07-03
Smart Images
Figure CN224458196U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium battery technology, and more specifically, to a square-shell battery cell integrated module. Background Technology
[0002] Square-shaped battery cells have high energy density and excellent space utilization. By connecting square-shaped battery cells in series through busbars to form electrical connections and modules, and then installing these modules into the battery box, this solution has mature technology and high reliability and safety.
[0003] However, the large size of prismatic battery cells and the difficulty in heat dissipation of prismatic cell systems have always been a problem that the industry has struggled to solve. Chinese Patent Publication No. CN116325298B proposes a battery, an electrical device, a method and apparatus for manufacturing the battery. In this invention, a thermal management component is installed within the battery and connected to a first wall with the largest surface area for each of a plurality of battery cells arranged in a row along a first direction. The thermal management component includes a pair of heat-conducting plates arranged opposite each other along a second direction perpendicular to the first wall, and a flow channel located between the pair of heat-conducting plates. In the second direction, the thickness D of the heat-conducting plates and the dimension H of the flow channel satisfy: 0.01 ≤ D / H ≤ 25. This eliminates the need for beams or other structures in the middle of the battery casing, maximizing the utilization of internal space.
[0004] However, the above solution has a drawback: the pipes 103 in the two sets of thermal management components are arranged in a relative manner on both sides of the battery box, which increases the space occupied in the X direction and makes it impossible to effectively improve the space utilization rate inside the battery. Utility Model Content
[0005] The technical problem to be solved by this utility model is: how to improve the utilization rate of the internal space of the battery box while effectively dissipating heat from the square-shell battery cells. In view of the problems existing in the prior art, a square-shell battery cell integrated module is provided.
[0006] The purpose and effects of this utility model are achieved by the following specific technical means:
[0007] A square-shell battery cell integrated module, comprising:
[0008] The energy module includes a buffer pad, a battery cell assembly, and a liquid cooling layer, each of which consists of more than one. The battery cell assembly is composed of several battery cells arranged in parallel. Every two battery cell assemblies constitute a battery cell unit, and the battery cell units are arranged in parallel with each other.
[0009] The liquid cooling layer is set between adjacent battery cells, and there are two connecting parts on one side of the liquid cooling layer, with water nozzles connected to the outside of the connecting parts;
[0010] Insulation panels are installed on both sides of the energy module, and end plates are installed on the outside of the insulation panels. The energy module, insulation panels and end plates are fixed together by plastic steel cable ties. A base plate is installed at the bottom of the energy module.
[0011] A further preferred embodiment: the area of the large end face of the liquid cooling layer is greater than or equal to the area of the side face of the battery cell assembly, and the large end face of the liquid cooling layer is in close contact with the side face of the battery cell assembly.
[0012] A further preferred embodiment: the liquid cooling layer is hollow inside, and the connecting part protrudes relative to the liquid cooling layer, with the connecting part protruding ≤8cm from the battery cell assembly.
[0013] A further preferred embodiment: the water nozzle is in the shape of a bent pipe, and a T-joint is connected to the outer end of the water nozzle;
[0014] Two horizontal main cooling pipes are installed outside the energy module, and the main cooling pipes correspond to the upper and lower connection parts respectively. The outer end of the tee is connected to the main cooling pipe.
[0015] The liquid cooling layer, water tap, tee, and main cooling pipeline are interconnected.
[0016] A further preferred embodiment: the two water nozzles installed on the same liquid cooling layer face opposite directions and are arranged in a staggered manner.
[0017] A further preferred embodiment: the buffer pad is disposed in the cell unit and located between the two sets of the cell units;
[0018] The buffer pad has hollow slots corresponding to the position and number of battery cells.
[0019] A further preferred embodiment: the outermost cell unit of the energy module is a group of cells, and the outermost part of the energy module is a buffer pad, which is in contact with the insulation board.
[0020] A further preferred embodiment: the top of the battery cell assembly is provided with several busbars, and the battery cells are electrically connected to each other through the busbars.
[0021] The beneficial effects of this utility model are:
[0022] The liquid cooling layer cools the battery cells. Coolant enters the upper main cooling pipe and then enters the liquid cooling layer through the tee and water nozzle. The liquid cooling layer's temperature decreases due to the coolant's temperature. The large end face area of the liquid cooling layer is greater than or equal to the side face area of the battery cell assembly. The large end face of the liquid cooling layer is in close contact with the side face of the battery cell assembly. With this design, one liquid cooling layer can dissipate heat and cool multiple battery cells in the battery cell assembly. Furthermore, because the liquid cooling layer is located between adjacent battery cell units, it ensures that one large end face of each battery cell is in contact with the liquid cooling layer, resulting in faster heat dissipation.
[0023] The cooling liquid forms a loop between the main cooling pipe, T-joint, water nozzle, liquid cooling layer, and cooling elements. The liquid cooling layer continuously cools the battery cell, ensuring battery performance and preventing high temperatures from affecting the battery's charging and discharging performance and safety. Because all water nozzles, T-joints, and main cooling pipes are distributed on the same side of the module, this design saves space in the battery module mounting box and does not require occupying space on both sides of the battery box, effectively improving the space utilization rate inside the box. Attached Figure Description
[0024] The present invention will be further described below with reference to the accompanying drawings.
[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0026] Figure 2 This is an exploded view of the battery cell unit structure of this utility model;
[0027] Figure 3 This is a schematic diagram of the liquid cooling layer structure of this utility model;
[0028] Figure 4 This is a partial structural diagram of the liquid cooling layer of this utility model;
[0029] Figure 5 This is a partial schematic diagram of the battery cell unit structure of this utility model (in assembly state).
[0030] Figures 1-5 Middle: End plate (1), insulation board (2), buffer pad (3), battery cell assembly (4), liquid cooling layer (5), connection part (501), water tap (6), tee head (7), main cooling pipeline (8), base plate (9), plastic steel cable tie (10). Detailed Implementation
[0031] To better understand the above-mentioned objectives, features, and advantages of this utility model, the following description is provided in conjunction with the accompanying drawings. Figures 1-5 The present invention will be further described in detail below with specific embodiments. The following embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any modifications and refinements made without departing from the scope of the present invention are within the patent protection scope of the present invention.
[0032] Please see Figure 1 and Figure 2A square-shell battery cell integrated module includes: an energy module, comprising a buffer pad 3, a battery cell group 4, and a liquid cooling layer 5, each of which has a quantity greater than one. The battery cell group 4 is composed of a plurality of battery cells arranged in parallel along the Z-axis direction. Every two groups of the battery cell groups 4 constitute a battery cell unit. Multiple groups of battery cell units are arranged in parallel along the X-axis direction. Those skilled in the art can design the number of battery cells arranged along the Z-axis direction and the number of battery cell units arranged along the X-axis direction according to actual usage requirements, battery box specifications, etc.
[0033] Please see Figure 2 The liquid cooling layer 5 is disposed between adjacent battery cells, and the buffer pad 3 is disposed in the battery cell. Each two sets of the battery cell groups 4 constitute a battery cell. The buffer pad 3 is located between two sets of the battery cell groups 4, that is, the buffer pad 3 is disposed at the large end face of the battery cell that does not contact the liquid cooling layer 5. The buffer pad 3 is made of elastic material, preferably silicone foam. The area of the hollow groove is smaller than the side area of the battery cell. The four edges of the large end face of the battery cell will contact the buffer pad 3. The buffer pad 3 can play an isolation effect between the two battery cells in the X-axis direction. The buffer pad 3 has hollow grooves corresponding to the position and number of battery cells. The hollow grooves can provide expansion space for the battery cells and avoid mutual compression between two adjacent battery cells arranged in the X-axis direction.
[0034] Please see Figures 2-5 The liquid cooling layer 5 has two connecting parts 501 on one side, and the other side of the liquid cooling layer 5 away from the connecting parts 501 is planar and designed to be parallel to or not protrude from the outer side of the battery cell assembly 4. The interior of the liquid cooling layer 5 is hollow (e.g., Figure 2 and Figure 3 The connecting part 501 protrudes from the liquid cooling layer 5 and protrudes from the cell assembly 4 by ≤8cm. A water nozzle 6 is connected to the outside of the connecting part 501. The water nozzle 6 is bent and a T-joint 7 is connected to the outer end of the water nozzle 6. Two main cooling pipes 8 are arranged horizontally in the X-axis direction outside the energy module. The main cooling pipes 8 are arranged vertically and vertically, and the main cooling pipes 8 correspond to the upper and lower connecting parts 501 respectively. The outer end of the T-joint 7 is connected to the main cooling pipes 8. The liquid cooling layer 5, water nozzle 6, T-joint 7 and main cooling pipes 8 are connected. When this battery module is installed in the pack box, the outer ends of the two main cooling pipes 8 can be connected to the cooling elements on the box, so that the cooling liquid forms a loop between the main cooling pipes 8, T-joint 7, water nozzle 6, liquid cooling layer 5 and cooling elements.
[0035] For liquid cooling, more specifically, in this implementation scheme, the right end of the upper main cooling pipe 8 is connected to the output end of the cooling element of the box, and the left end is closed, while the right end of the lower main cooling pipe 8 is closed, and the left end is connected to the input end of the cooling element of the box.
[0036] Coolant enters the upper main cooling pipe 8 and enters the liquid cooling layer 5 through the tee 7 and water nozzle 6. The temperature of the liquid cooling layer 5 decreases due to the temperature of the coolant. The large end face area of the side of the liquid cooling layer 5 is greater than or equal to the side face area of the cell assembly 4, and the large end face of the liquid cooling layer 5 is in close contact with the side of the cell assembly 4. With this design, one liquid cooling layer 5 can dissipate heat and cool down multiple cells in the cell assembly 4. And because the liquid cooling layer 5 is set between adjacent cell units, it ensures that one large end face of each cell is in contact with the liquid cooling layer 5, resulting in faster heat dissipation.
[0037] As coolant is continuously fed into the liquid cooling layer 5, the coolant inside the liquid cooling layer 5 flows out from the lower water nozzle 6. Through the lower tee 7 and the main cooling pipe 8, the coolant can be output to the cooling element of the housing. The cooling element cools the coolant again and outputs it to the upper main cooling pipe 8. This cycle continues, and the coolant forms a loop between the main cooling pipe 8, the tee 7, the water nozzle 6, the liquid cooling layer 5 and the cooling element. The liquid cooling layer 5 continuously cools the battery cell, ensuring battery performance and preventing high temperature from affecting the battery's charging and discharging performance and safety.
[0038] Because all the water taps 6, T-joints 7 and main cooling pipes 8 are located on the same side of the module, this design can save space in the battery module mounting box later, without occupying the space on both sides of the battery box, effectively improving the space utilization rate inside the box.
[0039] like Figure 5 As shown, the two water nozzles 6 installed on the same liquid cooling layer 5 face opposite directions and are arranged in a staggered manner. The staggered arrangement of the water nozzles 6 can be designed such that, for example, the upper water nozzle 6 faces to the right and the lower water nozzle 6 faces to the left, which can effectively achieve the avoidance of gaps. The space below the upper water nozzle 6 is left unemptied and no water nozzle 6 is installed there, and the space above the lower water nozzle 6 is left unemptied and no water nozzle 6 is installed there, which can avoid the water nozzle 6 installation positions conflicting and obstructing each other.
[0040] Please see Figure 1 and Figure 2 The energy module has insulation plates 2 on both sides, and end plates 1 on the outer side of the insulation plates 2. The outermost cell unit of the energy module is a set of cell groups 4. This avoids the two sets of cell groups 4 from not being able to contact the liquid cooling layer 5. The outermost part of the energy module is a buffer pad 3, which is in contact with the insulation plates 2. The insulation layer is made of cotton material. It prevents excessive heat exchange with other battery boxes in the outside through insulation, which would reduce the battery efficiency. The end plate 1 is a metal frame structure, which provides structural protection on both sides of the module. The bottom of the energy module is equipped with a base plate 9, which supports the module.
[0041] The top of the battery cell assembly 4 is provided with several busbars, and the battery cells are electrically connected through the busbars. The end plate 1 is provided with several hollow slots. The plastic steel cable tie 10 passes through the hollow slot on one side of the end plate 1 and extends to the hollow slot on the other side of the end plate 1. The energy module, the insulation board 2 and the end plate 1 are fixedly installed through the plastic steel cable tie 10.
Claims
1. A prismatic cell integrated module, characterized by, include: The energy module includes a buffer pad, a battery cell assembly, and a liquid cooling layer, each of which consists of more than one. The battery cell assembly is composed of several battery cells arranged in parallel. Every two battery cell assemblies constitute a battery cell unit, and the battery cell units are arranged in parallel with each other. The liquid cooling layer is set between adjacent battery cells, and there are two connecting parts on one side of the liquid cooling layer, with water nozzles connected to the outside of the connecting parts; Insulation panels are installed on both sides of the energy module, and end plates are installed on the outside of the insulation panels. The energy module, insulation panels and end plates are fixed together by plastic steel cable ties. A base plate is installed at the bottom of the energy module.
2. The prismatic cell integrated module of claim 1, wherein: The area of the large end face of the liquid cooling layer is greater than or equal to the area of the side face of the battery cell assembly, and the large end face of the liquid cooling layer is in close contact with the side face of the battery cell assembly.
3. The prismatic cell integrated module of claim 1, wherein: The liquid cooling layer is hollow inside, and the connecting part protrudes from the liquid cooling layer, with the connecting part protruding ≤8cm from the battery cell assembly.
4. The prismatic cell integrated module of claim 1, wherein: The water nozzle is in the shape of a bent pipe, and a T-joint is connected to the outer end of the water nozzle; Two horizontal main cooling pipes are installed outside the energy module, and the main cooling pipes correspond to the upper and lower connection parts respectively. The outer end of the tee is connected to the main cooling pipe. The liquid cooling layer, water tap, tee, and main cooling pipeline are interconnected.
5. The prismatic cell integrated module of claim 4, wherein: The two water nozzles installed on the same liquid cooling layer face opposite directions and are arranged in a staggered manner.
6. The prismatic cell integrated module of claim 1, wherein: The buffer pad is disposed in the cell unit and located between the two sets of the cell units; The buffer pad has hollow slots corresponding to the position and number of battery cells.
7. The prismatic cell integrated module of claim 1, wherein: The outermost battery cell unit of the energy module is a set of battery cells, and the outermost part of the energy module is a buffer pad, which is in contact with the insulation board.
8. The prismatic cell integrated module of claim 1, wherein: The top of the battery cell assembly is provided with several busbars, and the battery cells are electrically connected to each other through the busbars.