Heating acquisition composite film and energy storage power supply

Abstract

The utility model belongs to the technical field of batteries, and discloses a heating and collecting composite film and an energy storage power supply, the heating and collecting composite film comprises a first protective film, a base film and a second protective film which are stacked in sequence, and the heating and collecting composite film further comprises a heating assembly and a collecting assembly; the heating assembly is configured to be packaged between the first protective film and the base film, and the heating assembly is used for being electrified for heating; the acquisition assembly is configured to be packaged between the second protective film and the base film, and the acquisition assembly is used for acquiring electric signals. The heating assembly and the collecting assembly are integrated in the heating and collecting composite membrane provided by the utility model, and the heating and collecting composite membrane is directly assembled on a battery module as a single component incoming material, so that the assembly production process of an energy storage power supply is simplified, the production efficiency is improved, and the cost of equipment and tools is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a heating and collecting composite film and an energy storage power supply. Background Art

[0002] Energy storage power supply is a device that can store electrical energy and supply power to the outside. The energy storage power supply is equipped with a collection board for collecting battery status and performance parameters and a heating film that heats the battery in a low temperature environment to increase the rate of the battery's electrochemical reaction and the battery's power. The current collection board and heating film are two separate components, and the assembly and production process is complicated, the efficiency is low, and the equipment and tooling costs are high.

[0003] Therefore, there is an urgent need for a heating collection composite membrane and energy storage power supply to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a heating and collecting composite membrane and an energy storage power supply. The heating and collecting composite membrane integrates a heating component and a collecting component. The heating and collecting composite membrane is directly assembled on a battery module as a single component, which simplifies the assembly production process of the energy storage power supply, improves production efficiency, and reduces the cost of equipment and tooling.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, a heating and collecting composite film is provided, comprising a first protective film, a base film and a second protective film stacked in sequence, the heating and collecting composite film further comprising a heating component and a collecting component;

[0007] The heating component is configured to be encapsulated between the first protective film and the base film, and the heating component is used for generating heat when powered on;

[0008] The collection component is configured to be encapsulated between the second protective film and the base film, and the collection component is used to collect electrical signals.

[0009] Preferably, the heating assembly comprises a heating circuit, and the heating circuit is laid on the first side of the base film; and / or

[0010] The collection component includes a collection circuit, and the collection circuit is laid on the second side of the base film.

[0011] Preferably, in the thickness direction of the heating and collecting composite film, the heating circuit and the collecting circuit are staggered.

[0012] Preferably, the acquisition component further comprises:

[0013] A collection sheet, one end of which is electrically connected to the collection circuit, and the other end of which is electrically connected to the battery module; and / or

[0014] A temperature detection component is electrically connected to the acquisition circuit, and is used to detect the heating temperature of the heating component.

[0015] Preferably, a mounting hole is provided on the base film, the collection sheet is installed in the mounting hole, a first collection hole is correspondingly provided on the first protective film, a second collection hole is correspondingly provided on the second protective film, and the collection sheet is electrically connected to the battery module through the first collection hole and / or the second collection hole.

[0016] Preferably, the heating collection composite film further comprises a thermally conductive pad, which is arranged on a side of the second protective film away from the base film, and is used for conducting heat generated by the heating component.

[0017] Preferably, the thermal pad is made of thermally conductive silicone.

[0018] Preferably, the first protective film, the base film and the second protective film are packaged by thermal compression connection.

[0019] Preferably, the first protective film, the base film and the second protective film are all made of PI film.

[0020] In a second aspect, an energy storage power source is provided, comprising a battery module and the heating and collection composite film as described above, wherein the battery module comprises a battery cell and a bus, the heating component is thermally connected to the bus, and the collection component can collect electrical signals from the battery cell.

[0021] Beneficial effects of the utility model:

[0022] The heating and collecting composite film provided by the utility model is set as a multi-layer film structure, and a heating component and a collecting component are encapsulated and arranged between the layers. The heating component generates heat after being energized to increase the temperature of the battery module and ensure the chemical reaction rate and power in the battery module, and the collecting component can collect the electrical signal of the battery module. Since the heating component and the collecting component are integrated in the heating and collecting composite film, it can be directly assembled on the battery module as a single component, simplifying the assembly production process of the energy storage power supply, improving production efficiency, and reducing the cost of equipment and tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the heating and collecting composite membrane provided by the utility model;

[0024] Figure 2 This is a schematic diagram of the decomposed structure of the heating and collection composite membrane provided by the utility model;

[0025] Figure 3 It is a structural schematic diagram of the acquisition component provided by the utility model.

[0026] In the figure:

[0027] 10. Base film; 11. Mounting hole;

[0028] 20. a first protective film; 21. a first collection hole;

[0029] 30. second protective film; 31. second collection hole;

[0030] 40. Heating assembly; 41. Heating circuit; 42. Power supply harness;

[0031] 50. Collection component; 51. Collection circuit; 52. Collection sheet; 53. Temperature detection element;

[0032] 60. thermal pad; 61. third collection hole;

[0033] 70. Collection terminal. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] This embodiment provides an energy storage power supply, which includes a bracket, a battery module and a heating and collecting composite membrane. The battery module and the heating and collecting composite membrane are both installed in the bracket, and the heating and collecting composite membrane is electrically connected to the battery module. Figure 1-Figure 3 As shown, the heating and collecting composite film includes a heating component 40 and a collecting component 50, the battery module includes a battery cell and a bus, the heating component 40 is thermally connected to the bus, the bus is made of aluminum sheet, the heating component 40 heats the bus, and then conducts heat to the two pole ears of the battery cell, thereby heating the battery cell itself; the collecting component 50 can collect the electrical signals of the battery cell.

[0039] Further, such as Figure 1-Figure 3 As shown, the heating and collecting composite film also includes a first protective film 20, a base film 10 and a second protective film 30 stacked in sequence, the heating component 40 is configured to be encapsulated between the first protective film 20 and the base film 10, and the collecting component 50 is configured to be encapsulated between the second protective film 30 and the base film 10.

[0040] Specifically, the energy storage power supply provided in this embodiment heats the battery module through the heating and collection composite film to ensure that the energy storage power supply can be used in a low temperature environment, and collects the voltage, current and other parameters of the battery module. The heating and collection composite film is set as a multi-layer film structure, and a heating component 40 and a collection component 50 are encapsulated between the layers. The heating component 40 generates heat after being energized to increase the temperature of the battery module and ensure the chemical reaction rate and power in the battery module. The collection component 50 is used to collect the electrical signal of the battery module. Since the heating component 40 and the collection component 50 are integrated in the heating and collection composite film, it can be directly assembled onto the battery module as a single component, which simplifies the assembly and production process of the energy storage power supply, improves production efficiency, and reduces the cost of equipment and tooling.

[0041] Exemplarily, the first protective film 20, the base film 10 and the second protective film 30 are all made of PI film (polyimide film), which not only has excellent moisture and heat resistance, but also has excellent tensile strength and electrical insulation performance. Preferably, the base film 10 and the second protective film 30 are made of thermally conductive PI film such as DuPont thermally conductive PI film to improve the thermal conductivity to the battery module.

[0042] Furthermore, the first protective film 20, the base film 10 and the second protective film 30 are connected and packaged by heat pressing, and the sealing is efficient and stable.

[0043] For example, Figure 1 and Figure 2 As shown, the heating component 40 includes a heating circuit 41 and a power supply harness 42. The heating circuit 41 is laid on the first side of the base film 10, and the power supply harness 42 is also arranged on the first side of the base film 10. One end of the power supply harness 42 is electrically connected to the heating circuit 41, and the other end of the power supply harness 42 can extend from one side of the base film 10 to the outside of the heating collection composite film and be connected to an external power source to energize the heating circuit 41 to make the heating circuit 41 heat up.

[0044] For example, Figure 1 and Figure 2 As shown, two power supply harnesses 42 are provided, one of which is electrically connected to the positive pole of the external power source, and the other of which is electrically connected to the negative pole of the external power source.

[0045] For example, Figure 1-Figure 3 As shown, the collection component 50 includes a collection circuit 51, a collection sheet 52 and a temperature detection component 53. The collection circuit 51 is laid on the second side of the base film 10. One end of the collection sheet 52 is electrically connected to the collection circuit 51 by soldering, and the other end of the collection sheet 52 is used to be electrically connected to the battery module. The temperature detection component 53 is electrically connected to the collection circuit 51, and the temperature detection component 53 is used to detect the heating temperature of the heating component 40.

[0046] For example, Figure 2 As shown, the heating circuit 41 is a copper foil laid on the first side of the base film 10, and the collection circuit 51 is a copper foil laid on the second side of the base film 10. The routing arrangement of the heating circuit 41 corresponds to the layout of the bus bar on the one hand, so as to concentrate the heating area and improve the heating efficiency. On the other hand, in the thickness direction of the heating and collection composite film, the heating circuit 41 is staggered with the collection circuit 51 and the collection sheet 52 to avoid the heating circuit 41 directly heating the collection circuit 51 and the collection sheet 52, thereby reducing the influence of the heating component 40 on signal collection.

[0047] Exemplarily, the acquisition piece 52 may include a voltage detection element, a current detection element or a temperature acquisition element, etc. The voltage detection element can detect the cell voltage of the battery module in real time. The current detection element can measure the charging current and discharging current of the battery cell in real time. The temperature acquisition element can be either a temperature sensor or a thermistor. The temperature acquisition element can detect the surface temperature of the battery cell and determine whether the temperature of the battery cell is within the preset normal operating temperature range at this time. When the temperature of the battery module is higher than the highest preset value, the heating component 40 can stop heating the battery module so that the battery module does not overheat. When the temperature of the battery module is lower than the lowest preset value, the heating component 40 can heat the battery module to increase the temperature of the battery module to achieve a more efficient operating temperature of the battery module.

[0048] In this embodiment, the collection sheet 52 is a nickel sheet. In other embodiments, the collection sheet 52 may also be a copper sheet, a nickel-plated copper sheet, or other components.

[0049] For example, Figure 1 and Figure 2 As shown, the base film 10 is provided with a mounting hole 11, the collection sheet 52 is installed in the mounting hole 11, the first protective film 20 is correspondingly provided with a first collection hole 21, and the second protective film 30 is correspondingly provided with a second collection hole 31, and the collection sheet 52 is electrically connected to the battery module through the first collection hole 21 and / or the second collection hole 31. After the heating collection composite film is loaded into the bracket, the operator can connect the collection sheet 52 to the corresponding bus bar through the first collection hole 21 and / or the second collection hole 31 by laser welding or other methods.

[0050] For example, Figure 1-Figure 3 As shown, there are multiple collection pieces 52, and there are multiple collection lines 51, and the multiple collection pieces 52 are electrically connected to the multiple collection lines 51 in a one-to-one correspondence. There are also multiple mounting holes 11, first collection holes 21, and second collection holes 31, and the mounting holes 11, first collection holes 21, and second collection holes 31 are all arranged in a one-to-one correspondence with the collection pieces 52.

[0051] Exemplarily, the temperature detection element 53 is a NTC (negative temperature coefficient thermistor) chip, which is attached to the second side of the base film 10 and arranged corresponding to the position of the heating circuit 41, so as to detect the temperature of the heating circuit 41 through the base film 10, prevent the heating circuit 41 from drying out, and improve safety. Of course, in other embodiments, the temperature detection element 53 can also be a thermocouple, a temperature sensor, etc.

[0052] For example, Figure 1 and Figure 2As shown, the heating collection composite film also includes a collection terminal 70, which is arranged through the base film 10, the first protective film 20 and the second protective film 30, and is located at one end of the base film 10. The collection terminal 70 is electrically connected to the collection circuit 51. The electrical signals collected by the collection sheet 52 and the temperature detection element 53 can be transmitted to the collection terminal 70 through the collection circuit 51. The collection terminal 70 can be connected to an external signal line to transmit the electrical signal emitted from the collection component 50.

[0053] For example, Figure 2 As shown, the heating collection composite film also includes a thermal pad 60, which is arranged on the side of the second protective film 30 away from the base film 10 and is adhered to the surface of the second protective film 30. The thermal pad 60 is used to conduct the heat generated by the heating component 40, so that the heat generated by the heating circuit 41 is transferred from the base film 10 to the second protective film 30, and then transferred to the bus of the battery module through the thermal pad 60. Furthermore, corresponding to the position of the mounting hole 11, a third collection hole 61 is set on the thermal pad 60 to provide a clearance for the connection between the collection sheet 52 and the bus.

[0054] Exemplarily, the thermal pad 60 is made of thermally conductive silicone, has good thermal conductivity, and has good compressibility. By setting the thermal pad 60, the gap between the heating collection composite film and the bus can be filled to ensure the fit of the thermal conductive surface, so as to maintain a good heat transfer path and prevent dry burning.

[0055] After the heating and collection composite film is received as a single component, the assembly steps of the energy storage power supply provided in this embodiment are as follows:

[0056] Connect busbars and cells by laser welding;

[0057] Loading the heating collection composite membrane into the bracket;

[0058] The collecting sheet 52 and the bus bar are connected by laser welding.

[0059] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A heating collection composite membrane, characterized in that: It includes a first protective film, a base film and a second protective film which are stacked in sequence, and the heating and collecting composite film also includes a heating component and a collecting component; The heating component is configured to be encapsulated between the first protective film and the base film, and the heating component is used for generating heat when powered on; The collection component is configured to be encapsulated between the second protective film and the base film, and the collection component is used to collect electrical signals.

2. The heating collection composite film according to claim 1, characterized in that: The heating assembly includes a heating circuit, and the heating circuit is laid on the first side of the base film; and / or The collection component includes a collection circuit, and the collection circuit is laid on the second side of the base film.

3. The heating collection composite film according to claim 2, characterized in that: In the thickness direction of the heating and collecting composite film, the heating circuit and the collecting circuit are arranged in a staggered manner.

4. The heating collection composite film according to claim 2, characterized in that: The acquisition component also includes: A collection sheet, one end of which is electrically connected to the collection circuit, and the other end of which is electrically connected to the battery module; and / or A temperature detection component is electrically connected to the acquisition circuit, and is used to detect the heating temperature of the heating component.

5. The heating collection composite film according to claim 4, characterized in that: The base film is provided with a mounting hole, the collection sheet is installed in the mounting hole, the first protective film is correspondingly provided with a first collection hole, the second protective film is correspondingly provided with a second collection hole, and the collection sheet is electrically connected to the battery module through the first collection hole and / or the second collection hole.

6. The heating collection composite film according to any one of claims 1 to 5, characterized in that: The heating collection composite film also includes a thermal pad, which is arranged on a side of the second protective film away from the base film, and is used to conduct heat generated by the heating component.

7. The heating collection composite film according to claim 6, characterized in that: The thermal conductive pad is made of thermal conductive silica gel.

8. The heating collection composite film according to any one of claims 1 to 5, characterized in that: The first protection film, the base film and the second protection film are packaged by thermal compression connection.

9. The heating collection composite film according to any one of claims 1 to 5, characterized in that: The first protective film, the base film and the second protective film are all made of PI film.

10. An energy storage power supply, characterized in that: It comprises a battery module and the heating and collecting composite film as described in any one of claims 1 to 9, wherein the battery module comprises a battery cell and a bus bar, the heating component is thermally connected to the bus bar, and the collecting component can collect the electrical signal of the battery cell.

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