A thermally insulated single-cell battery module

Abstract

This utility model discloses a heat-insulating single-cell battery module, relating to the field of battery technology. It aims to address the issue that some devices, due to space constraints and installation location requirements, need to be installed in high-temperature environments, placing higher demands on the high-temperature resistance of lithium-ion batteries. The module features a pouch battery within a battery casing, with a heating element between the pouch battery and the casing. A PCB board is mounted on the pouch battery, with two PCB boards forming a group. Each group of PCB boards has a busbar extending out of the battery casing. Thermally conductive adhesive and heat-insulating adhesive are applied to the battery casing. The pouch battery is fully impregnated and encapsulated with thermally conductive potting compound, which promotes uniform heat distribution within the pouch battery, improving its lifespan and safety. The heat-insulating adhesive further isolates the pouch battery from the environment, maintaining a relatively warm environment that maximizes battery life.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an insulated single-cell battery module. Background Technology

[0002] Existing soft-pack lithium-ion battery modules are generally used in normal temperature environments. However, some devices, due to space and installation location requirements, need to install lithium battery packs in high-temperature environments, which places higher demands on the high-temperature resistance of lithium-ion batteries.

[0003] Therefore, this application provides an insulated single-cell battery module to meet the requirements. Utility Model Content

[0004] The purpose of this application is to provide a heat-insulating single-cell battery module, which aims to solve the problem that some devices, due to space and installation location requirements, need to install lithium battery packs in high-temperature environments, which places higher demands on the high-temperature resistance of lithium-ion batteries.

[0005] To achieve the above objectives, this application provides the following technical solution: a heat-insulating single-cell battery module, comprising a soft-pack battery and heating element, PCB board, busbar, battery casing, heat-insulating adhesive, and thermally conductive adhesive; The battery casing contains a pouch battery, and a heating element is provided between the pouch battery and the battery casing. A PCB board is provided on the top surface of the pouch battery. Two PCB boards are grouped together, and a busbar is provided on each group of PCB boards. The busbar extends out of the battery casing. Thermally conductive adhesive and thermally insulating adhesive are respectively provided on the battery casing.

[0006] Preferably, the battery housing further includes an inner cell shell, an outer cell shell, and a top cover, wherein the inner cell shell is disposed inside the outer cell shell, and the top cover is provided on the top surface of the outer cell shell; The pouch battery is installed inside the inner shell of the single cell, and the heating element is wrapped around the surface of the pouch battery. The busbar passes through the top cover of the unit.

[0007] Preferably, the top cover of the unit is provided with an exhaust hole and a heating wire hole.

[0008] Preferably, the busbar includes a positive electrode busbar and a negative electrode busbar, which are fixed on the PCB board and both pass through the top cover of the unit.

[0009] Preferably, the positive and negative electrode leads on the soft-pack battery pass through the positive electrode lead hole and the negative electrode lead hole respectively, and are then connected to the corresponding positive electrode lead bus and the negative electrode lead bus by fixing screws; The PCB board is provided with PCB tab through holes for the positive and negative leads to pass through.

[0010] Preferably, the thermally conductive adhesive is injected into the inner shell of the monomer; the thermally insulating adhesive is injected into the outer shell of the monomer.

[0011] Preferably, the positive and negative leads on the heating element extend out of the heating wire hole.

[0012] Preferably, the heating element is made of polyimide-coated resistance wire; the busbar is made of aluminum alloy, silver, or copper; the inner shell of the monomer is made of metal; the outer shell of the monomer is made of plastic; and the top cover of the monomer is made of PPS or any one of PA, PP, or ABS.

[0013] In summary, the technical effects and advantages of this utility model are as follows: In this invention, the soft-pack battery is fully impregnated and wrapped with thermally conductive potting compound, which is beneficial for uniform heat distribution inside the soft-pack battery and improves its lifespan and safety. The soft-pack battery is also insulated with heat-insulating adhesive, which helps to isolate the soft-pack battery from the environment and ensures that the soft-pack battery is in a relatively warm environment, which is conducive to maximizing the lifespan of the soft-pack battery. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a schematic diagram of the soft-pack battery structure of this utility model.

[0016] In the diagram: 1. Soft-pack battery; 11. Positive and negative lead-out tabs; 12. Positive tab through-hole; 13. Negative tab through-hole; 2. Heating element; 21. Positive and negative leads; 3. PCB board; 31. Tab through-hole on PCB; 4. Positive tab busbar; 5. Negative tab busbar; 6. Inner shell of the cell; 7. Outer shell of the cell; 8. Top cover of the cell; 81. Vent hole; 82. Heating wire hole; 9. Thermal insulation adhesive; 10. Thermal conductive adhesive; 11. Fixing screw. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example: Reference Figure 1-3 The heat-insulating single-cell battery module shown includes a pouch battery 1 and a battery casing. The pouch battery 1 is installed inside the battery casing and is a lithium-ion battery.

[0019] As one embodiment of this invention, the battery housing 5 of the battery module includes an inner cell housing 6, an outer cell housing 7, and a top cover 8. The inner cell housing 6 is placed inside the outer cell housing 7, and the top cover 8 is installed on the top surface of the outer cell housing 7. The top cover 8 is provided with a vent hole 8-1 and a heating wire hole 8-2. The vent hole 8-1 can release gas when the internal pressure of the battery is too high, ensuring safe use. The heating wire hole 8-2 is used for the lead wire of the heating element 2 to pass through.

[0020] In one embodiment of this invention, the pouch battery 1 is installed inside the inner shell 6 of the single cell, and the heating element 2 is wound around the surface of the pouch battery 1 in a snake shape. This winding method can ensure that the heating element 2 and the pouch battery 1 are in full contact, thus ensuring uniform heating. The positive and negative electrode tabs 1-1 provided on the pouch battery 1 pass through the corresponding positive electrode tab through holes 1-2 and negative electrode tab through holes 1-3 on the inner shell 6 of the single cell, respectively. The positive electrode tab through holes 1-2 and negative electrode tab through holes 1-3 can be circular, elliptical, or square in any shape.

[0021] As one implementation method in this embodiment, the top surface of the soft-pack battery 1 is provided with a PCB board 3. Two PCB boards 3 are grouped together, and each group of PCB boards 3 is provided with a busbar 4. The busbar 4 includes a positive electrode tab busbar 5 and a negative electrode tab busbar 6. The PCB board 3 has a PCB tab through hole 3-1 for the positive and negative leads 1-1 to pass through. After the positive and negative leads 1-1 of the soft-pack battery 1 pass through the through hole, they are connected to the corresponding positive lead bus 5 and negative lead bus 6 by fixing screws 11. The positive lead bus 5 and negative lead bus 6 are fixed on the PCB board 3 and both pass through the single cell cover 8 to realize the connection between the battery and the external circuit.

[0022] As one implementation method in this embodiment, during the assembly process, the positive electrode busbar 5 and the negative electrode busbar 6 are first soldered to the PCB board 3. Then, the positive and negative electrode leads 1-1 of the soft-pack battery 1 are passed through the electrode through holes 3-1 on the PCB. Next, the heating element 2 is wrapped in a snake shape around the surface of the soft-pack battery 1. Then, the positive and negative electrode leads 1-1 of the soft-pack battery 1 are fixed to the corresponding positive electrode busbar and negative electrode busbar with fixing screws 11. Afterwards, a certain amount of thermally conductive adhesive 10 is injected into the inner shell 6 of the single cell, and the assembled soft-pack battery 1 is placed into the inner shell 6 of the single cell and left for 6-8 hours. This allows the soft-pack battery 1 to be fully soaked, wrapped and completely fixed by the thermally conductive adhesive 10, which is beneficial to the uniform heat distribution inside the soft-pack battery 1 and improves its lifespan and safety.

[0023] As one embodiment of this example, a certain amount of heat-insulating adhesive 9 is injected into the single-cell outer shell 7, the single-cell inner shell 6 containing the soft-pack battery 1 is inserted into the single-cell outer shell 7, and the positive and negative electrode leads 2-1 on the heating element 2 are passed out through the heating wire hole. Next, ultrasonically weld the top cover 8 of the single cell to the outer shell 7 of the single cell, and place the assembled single cell for 20-24 hours to allow the heat insulation adhesive 9 to fully cure. Finally, use a plastic plate to remove excess adhesive from the top cover of the individual cell 8, and clean the surface of the individual cell module to complete the assembly of the individual cell module.

[0024] As one embodiment of this invention, thermally conductive adhesive 10 is injected into the inner shell 6 of the single cell, which allows the soft-pack battery 1 to be fully wetted and wrapped; thermally insulating adhesive 9 is injected into the outer shell 7 of the single cell, which can effectively insulate the soft-pack battery 1. When the battery module is in a high-temperature environment, the heat-insulating adhesive 9 inside the single-cell outer shell 7 can effectively block the external high temperature from entering, so that the soft-pack battery 1 is in a relatively suitable temperature environment; while the thermally conductive adhesive 10 inside the single-cell inner shell 6 ensures that the heat inside the soft-pack battery 1 is uniform. The two work together to maximize the life of the soft-pack battery 1.

[0025] As one implementation method in this embodiment, the heating element 2 is made of polyimide-coated resistance wire, which is resistant to high temperatures and has good insulation properties, enabling it to stably perform its heating function; the busbar 4 is made of copper, which has excellent conductivity and can reduce losses during current transmission; the inner shell 6 is made of metal, which has good thermal conductivity and helps with heat transfer and uniform distribution; the outer shell 7 is made of plastic, which has good thermal insulation properties and can provide basic thermal insulation protection for the internal structure; and the top cover 8 is made of PPS, which has excellent high temperature resistance and mechanical strength, making it suitable for use in high-temperature environments.

[0026] The aforementioned heat insulation adhesive 9 is a flame-retardant foam sealant; the thermally conductive adhesive 10 is an organosilicon thermally conductive potting compound.

[0027] The working principle of this utility model is as follows: First, the positive electrode busbar 4 and the negative electrode busbar 5 are soldered to the PCB board 3. Then, the positive and negative electrode leads 1-1 of the pouch battery 1 are passed through the corresponding electrode through holes 3-1 on the PCB. Next, the heating element 2 is snake-shaped and wound around the surface of the pouch battery 1. Then, the positive and negative electrode leads 1-1 of the pouch battery 1 are fixed to the corresponding positive electrode busbar 4 and negative electrode busbar 5 with the fixing screws 11. Next, a certain amount of thermally conductive adhesive 10 is injected into the inner shell 6 of the single unit. Finally, the assembled pouch battery 1 group is placed into the inner shell 6 of the single unit. Next, place the soft-pack battery 1 group for 6-8 hours to ensure that the soft-pack battery 1 is completely fixed. Then, inject a certain amount of the heat-insulating adhesive 9 into the single-cell outer shell 7. Next, insert the single-cell inner shell 6 containing the soft-pack battery 1 into the single-cell outer shell 7, and pass the positive and negative leads 2-1 of the heating element 2 through the single-cell top cover 8. Next, ultrasonically weld the single-cell top cover 8 to the single-cell outer shell 7. Then, place the assembled single-cell battery for 20-24 hours to allow the heat-insulating adhesive 9 to fully cure. Use a plastic plate to remove the excess adhesive from the top of the single-cell top cover 8 and clean the surface of the single-cell battery module. The assembly of the single-cell battery module is then completed.

[0028] The electromechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments; they are common knowledge.

[0029] Components not described in detail in this article are existing technologies.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 thermally insulated monobloc battery module, characterized by: Includes a soft-pack battery (1) and a heating element (2), a PCB board (3), a busbar, a battery casing, thermal insulation adhesive (9), and thermally conductive adhesive (10); The battery housing contains a soft-pack battery (1), and a heating element (2) is provided between the soft-pack battery (1) and the battery housing. The top surface of the soft-pack battery (1) is provided with a PCB board (3). The PCB boards (3) are in groups of two, and each group of PCB boards (3) is provided with a busbar. The busbar extends out of the battery housing. Thermal conductive adhesive (10) and thermal insulation adhesive (9) are respectively provided on the battery housing.

2. The adiabatic monobloc battery module of claim 1, wherein: The battery housing also includes a single inner shell (6), a single outer shell (7), and a single top cover (8). The single inner shell (6) is located inside the single outer shell (7), and the single top cover (8) is provided on the top surface of the single outer shell (7). The soft-pack battery (1) is installed inside the inner shell (6) of the single cell, and the heating element (2) is wrapped around the surface of the soft-pack battery (1); The busbar passes through the top cover of the unit (8).

3. The adiabatic monobloc battery module of claim 2, wherein: The unit cover (8) is provided with an exhaust hole (8-1) and a heating wire hole (8-2).

4. The adiabatic monobloc battery module of claim 2, wherein: The busbar includes a positive electrode busbar (4) and a negative electrode busbar (5). The positive electrode busbar (4) and the negative electrode busbar (5) are fixed on the PCB board (3) and both pass through the unit cover (8).

5. The adiabatic battery module of claim 4, wherein: The positive and negative lead-out tabs (1-1) provided on the soft-pack battery (1) pass through the positive tab through hole (1-2) and the negative tab through hole (1-3) respectively, and are then connected to the corresponding positive tab busbar (4) and the negative tab busbar (5) by fixing screws (11); The PCB board (3) is provided with a PCB tab through hole (3-1) for the positive and negative lead-out tabs (1-1) to pass through.

6. The adiabatic monobloc battery module of claim 4, wherein: The thermally conductive adhesive (10) is injected into the inner shell (6) of the monomer; the thermally insulating adhesive (9) is injected into the outer shell (7) of the monomer.

7. The adiabatic monobloc battery module of claim 4, wherein: The positive and negative leads (2-1) on the heating element (2) pass through the heating wire hole (8-2).

8. The adiabatic monobloc battery module of claim 7, wherein: The heating element (2) is made of polyimide-coated resistance wire; the busbar is made of aluminum alloy, silver, or copper; the inner shell (6) of the unit is made of metal; the outer shell (7) of the unit is made of plastic; and the top cover (8) of the unit is made of PPS or PA, PP, or ABS.

Images