Pouch battery cell integrated module

Abstract

The utility model provides a kind of soft package battery cell integrated module, it is related to battery cell technical field, energy module is by several groups of parallel arrangement battery cell unit composition, battery cell unit is by two rows of battery cell group composition, and inner buffer pad is clamped between battery cell group, and liquid cooling plate is provided between battery cell unit, liquid cooling plate one side is provided with two water taps of up and down, and the outer end of water tap is connected with tee head, and connecting pipe is connected between tee head;Protection unit is provided with two groups, and it is opposite arrangement in the two outer ends of energy module;Multiple tee head is staggered arrangement, so that tee head between each other will not conflict, realize to the soft package battery cell large end face high -efficient heat dissipation, while, solve the problem that traditional soft package battery module is densely arranged in liquid cooling connector and cannot be installed.

Description

Technical Field

[0001] This utility model relates to the field of battery cell technology, and more specifically, to a soft-pack battery cell integrated module. Background Technology

[0002] By integrating power battery cells into modules and then installing them into the battery box, this solution is a mature technology that simplifies battery assembly, reduces manufacturing costs, and also reduces the cost of components, resulting in a significant decrease in the overall cost of the battery system.

[0003] The efficient cooling system for pouch power battery modules has always been a major challenge and pain point in the industry. Because pouch power batteries are thin, and multiple liquid cooling plates are needed to efficiently dissipate heat by interleaving them within the large end face of the pouch battery, the dense arrangement of these plates makes the connectors difficult to arrange and can cause them to conflict. Therefore, existing technologies often use a single large liquid cooling plate to cover all the pouch cells, such as the power battery structure for a novel MTB module integrated vehicle frame described in Chinese Patent No. 202320051339.9. This design only provides heat dissipation for the small end face of the pouch cells, resulting in a small contact area and poor heat dissipation. This patent addresses these challenges by providing a corresponding solution. Utility Model Content

[0004] The technical problem to be solved by this utility model is that heat dissipation is not effective due to the small contact area of ​​the small end face of the soft-pack battery cell. In view of the problems existing in the prior art, a soft-pack battery cell integrated module is provided.

[0005] The purpose and effect of this utility model are achieved by the following specific technical means: a soft-pack battery cell integrated module, comprising:

[0006] The energy module consists of several groups of parallel battery cell units. Each battery cell unit consists of two rows of battery cell groups. An inner buffer pad is sandwiched between the battery cell groups, and a liquid cooling plate is installed between the battery cell units. Two water nozzles are installed on one side of the liquid cooling plate. A T-joint is connected to the outer end of the water nozzle, and a connecting pipe is connected between the T-joints.

[0007] The protection unit consists of two sets, arranged opposite each other at the two outer ends of the energy module.

[0008] A further preferred embodiment: the battery cell group consists of at least two pouch cells arranged side by side, with the tabs of the pouch cells in the same group connected to each other. This design enables electrical connection between the pouch cells, allowing for charge-discharge cycles.

[0009] A further preferred embodiment: the area of ​​the large end face of the liquid cooling plate 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 plate is in close contact with the side face of the battery cell assembly;

[0010] With this design, the liquid cooling plate dissipates heat from the large end face of the pouch cell, resulting in a larger contact area and faster heat dissipation.

[0011] A further preferred embodiment: the side of the liquid cooling plate with the water nozzle is the connection end, and the water nozzles of adjacent liquid cooling plates face opposite directions. With this design, the tee heads connected to the water nozzles can be staggered to prevent them from being densely installed side by side on one side.

[0012] A further preferred embodiment: the liquid cooling plate is hollow inside, and at least one side of the pouch cell is in contact with the liquid cooling plate. This design ensures that at least one side of the pouch cell is in contact with the liquid cooling plate, which can dissipate heat from each pouch cell.

[0013] A further preferred embodiment: the liquid cooling plate, the tee and the connecting pipe are connected.

[0014] A further preferred embodiment: the outermost battery cell unit at both ends of the energy module is provided with only a single-layer soft-pack battery cell. With this design, the outermost liquid cooling plate only needs to dissipate heat from the single-layer soft-pack battery cell, thus avoiding the situation where the outer layer of the double-layer soft-pack battery cell cannot contact the liquid cooling plate.

[0015] A further preferred embodiment: The protection unit includes an end plate, an insulation layer, and an outer buffer pad. The outer buffer pad is disposed on the outer end face of the soft-pack battery cells on both sides of the energy module, and the insulation layer is disposed on the outer end of the outer buffer pad. The end plate is installed on the outer end of the insulation layer. The design of the protection unit plays a protective role for the entire soft-pack module.

[0016] The beneficial effects of this utility model are:

[0017] The liquid cooling plate is placed between adjacent cell units, ensuring that one large end face of each pouch cell is in contact with the liquid cooling plate, resulting in faster heat dissipation. The water nozzles in the multiple liquid cooling plates are arranged alternately from left to right, with gaps between adjacent water nozzles on the same side. These gaps correspond to the installation positions of the T-connectors on the opposite side. This staggered arrangement of multiple T-connectors prevents them from interfering with each other, achieving efficient heat dissipation of the large end face of the pouch cell while solving the problem of densely packed liquid cooling connectors in traditional pouch battery modules, which makes installation impossible. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram showing the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram showing the disassembly of the protection unit and energy module structure of this utility model;

[0021] Figure 3 This is a partial structural diagram of the liquid cooling plate of this utility model;

[0022] Figure 4 This is a top view of the overall structure of this utility model.

[0023] Figures 1-4 Middle: End plate (1), insulation layer (2), inner buffer pad (3), battery cell assembly (4), outer buffer pad (401), liquid cooling plate (5), water tap (501), tee head (6), connecting pipe (7), outer plate (8). Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are merely examples for implementing this utility model. It must be pointed out that the disclosed embodiments do not limit the scope of this utility model. On the contrary, any modifications and refinements made without departing from the scope of this utility model are within the patent protection scope of this utility model.

[0025] Please see Figures 1-3 A soft-pack battery cell integrated module, comprising:

[0026] The energy module consists of several groups of battery cells arranged in parallel (such as...). Figure 1 (As shown) The battery cell units are arranged along the X-axis, and each battery cell unit consists of two rows of cell groups 4. (e.g.) Figure 2 As shown, each cell group 4 preferably has two soft-pack cells arranged side by side along the Z-axis, and the tabs of adjacent soft-pack cells in the same cell group 4 are welded together to achieve electrical connection between the cells. An inner buffer pad 3 is sandwiched between the cell groups 4. The inner buffer pad 3 is made of elastic material, preferably silicone foam material, to prevent adjacent soft-pack cells from squeezing or wearing each other.

[0027] A liquid cooling plate 5 is provided between the battery cells. The liquid cooling plate 5 has two water nozzles 501 on one side. The outer end of the water nozzle 501 is connected to a T-joint 6. A connecting pipe 7 is connected between the T-joints 6 on the same end. The liquid cooling plate 5 is hollow. The liquid cooling plate 5, the T-joint 6 and the connecting pipe 7 are connected. The upper connecting pipe 7 and the T-joint 6 form a water outlet pipe, and the lower connecting pipe 7 and the T-joint 6 form a drainage pipe. When this soft-pack battery module is installed in the pack box, the rightmost connecting pipe 7 of the water outlet pipe and the leftmost connecting pipe 7 of the drainage pipe can be connected to the cooling element on the box, so that the cooling liquid forms a loop between the cooling element, the connecting pipe 7, the T-joint 6 and the liquid cooling plate 5.

[0028] The coolant first enters the outlet pipe and then enters the liquid cooling plate 5 through the upper pipe 7, tee 6, and water nozzle 501. The temperature of the liquid cooling plate 5 decreases due to the temperature of the coolant. The large end face area of ​​the side of the liquid cooling plate 5 is greater than or equal to the side face area of ​​the cell group 4, and the large end face of the liquid cooling plate 5 is in close contact with the side of the cell group 4. With this design, one liquid cooling plate 5 can dissipate heat and cool down two soft-pack cells in the cell group 4. And because the liquid cooling plate 5 is placed between adjacent cell units, it ensures that one large end face of each soft-pack cell is in contact with the liquid cooling plate 5, resulting in faster heat dissipation.

[0029] As coolant is continuously fed into the liquid cooling plate 5, the coolant inside the liquid cooling plate 5 flows out from the water nozzle 501 at the lower end. Through the lower three-way connector 6 and the connecting pipe 7, the coolant can be discharged to the cooling element of the housing. The cooling element cools the coolant again and outputs it to the outlet pipe. This cycle continues, and the coolant forms a loop between the outlet pipe, the drain pipe and the cooling element. The liquid cooling plate 5 continuously cools the battery cell to ensure battery performance and prevent high temperature from affecting the battery's charging and discharging performance and safety.

[0030] Please see Figures 1-4 One side of the liquid cooling plate 5 with the water nozzle 501 is the connection end. The water nozzles 501 of adjacent liquid cooling plates 5 face opposite directions. For example, taking the X-axis as the left and right direction, the liquid cooling plates 5 from left to right are plate a, plate b, plate c, etc. Then the water nozzle 501 of the first plate a on the left is located at the rear end, the water nozzle 501 of plate b is located at the front end, the water nozzle 501 of plate c is located at the rear end, and so on. The arrangement of the water nozzles 501 in the multiple liquid cooling plates 5 is staggered from left to right (e.g., ...). Figure 4 As shown, there is a clearance position between adjacent water nozzles 501 on the same side. The clearance position corresponds to the installation position of the three-way connector 6 on the opposite side. In this way, multiple three-way connectors 6 are arranged in an alternating manner so that they do not conflict with each other. This achieves efficient heat dissipation of the large end face of the soft-pack battery cell, while solving the problem of dense liquid cooling connectors in traditional soft-pack battery modules, which makes installation impossible.

[0031] Preferably, the tabs in the pouch cell are located in the middle of the cell body along the Y-axis, so that the position of the outermost tab of the pouch cell corresponds to the space between the two connection ends, forming a clearance area, so that the busbar can be installed to the outermost tab of the pouch cell later.

[0032] Preferably, if two sets of battery cells 4 are set in the outermost battery cell units at both ends of the energy module, then the outermost battery cell group 4 cannot contact the liquid cooling plate 5. Therefore, it is possible to set only a single-layer soft-pack battery cell in the outermost battery cell units at both ends of the energy module.

[0033] Please see Figure 1 and Figure 2The protection unit consists of two sets arranged opposite each other at the two outer ends of the energy module. The protection unit includes an end plate 1, an insulation layer 2, and an outer buffer pad 401. The outer buffer pad 401 is located on the outer end face of the soft-pack battery cell on both sides of the energy module, and the insulation layer 2 is located at the outer end of the outer buffer pad 401. The end plate 1 is installed at the outer end of the insulation layer 2. The protection unit can be fixed to the energy module using steel cable ties. After fixing, the outer plate 8 is installed at the top and bottom ends to complete the assembly. The design of the protection unit and the outer plate 8 plays a protective role for the entire soft-pack module.

Claims

1. A soft-pack battery cell integrated module, characterized in that, include: The energy module consists of several groups of parallel battery cell units. Each battery cell unit consists of two rows of battery cell groups. An inner buffer pad is sandwiched between the battery cell groups, and a liquid cooling plate is installed between the battery cell units. Two water nozzles are installed on one side of the liquid cooling plate. A T-joint is connected to the outer end of the water nozzle, and a connecting pipe is connected between the T-joints. The protection unit consists of two sets, arranged opposite each other at the two outer ends of the energy module.

2. The soft-pack battery cell integrated module according to claim 1, characterized in that: The battery cell assembly consists of at least two pouch cells arranged side by side, with the tabs of the pouch cells in the same assembly interconnected.

3. The soft-pack battery cell integrated module according to claim 1, characterized in that: The large end face area of ​​the liquid cooling plate is greater than or equal to the side face area of ​​the battery cell assembly, and the large end face of the liquid cooling plate is in close contact with the side face of the battery cell assembly.

4. The soft-pack battery cell integrated module according to claim 1, characterized in that: The side of the liquid cooling plate with the water nozzle is the connection end, and the water nozzles on adjacent liquid cooling plates face opposite directions.

5. A soft-pack battery cell integrated module according to claim 2, characterized in that: The liquid cooling plate is hollow inside, and at least one side of the soft-pack battery cell is in contact with the liquid cooling plate.

6. The soft-pack battery cell integrated module according to claim 1, characterized in that: The liquid cooling plate, tee, and connecting pipe are interconnected.

7. A soft-pack battery cell integrated module according to claim 2, characterized in that: The outermost battery cell units at both ends of the energy module contain only a single-layer soft-pack battery cell.

8. A soft-pack battery cell integrated module according to claim 7, characterized in that: The protection unit includes an end plate, an insulation layer, and an outer buffer pad. The outer buffer pad is disposed on the outer end face of the soft-pack battery cell on both sides of the energy module, and the insulation layer is disposed on the outer end of the outer buffer pad. The end plate is installed on the outer end of the insulation layer.

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