Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment, the battery comprises a plurality of battery cells arranged along the thickness direction, a temperature acquisition assembly is arranged between the large surfaces of the battery cells, the temperature acquisition assembly comprises a circuit board and a thermistor, the circuit board extends along the large surfaces of the battery cells, and the thermistor is arranged on the circuit board. According to the battery disclosed by the utility model, the temperature acquisition assembly consisting of the circuit board and the thermistor is arranged between the large surfaces of the battery cell, so that the temperature of the large surfaces of the battery cell can be accurately measured and subjected to feedback compensation, the internal temperature change of the battery cell is effectively monitored, the potential safety hazard and risk caused by internal temperature rise of the battery cell are solved, and the use safety of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and more specifically, to a battery and electrical equipment. Background Art

[0002] Due to the flat structure of the battery and the size of the NTC (thermistor) in traditional large-area battery solutions, the NTC temperature sampling module is generally arranged on the cover plate at the end of the battery cell. The temperature of the cover plate at the end of the battery cell can only collect the temperature of one end of the battery, and cannot collect and measure other areas of the battery. If the temperature in the middle of the battery is abnormal, it takes a long time for the temperature to be transmitted to the end of the battery cell, and the NTC will collect the abnormal temperature signal and provide feedback compensation, which poses a safety hazard and risk. Utility Model Content

[0003] One purpose of the utility model is to provide a new technical solution for batteries and electrical equipment, which can at least solve the problem in the prior art that the temperature of other areas of the battery cannot be collected and measured due to the NTC being arranged at the end of the battery, thereby causing safety hazards.

[0004] A first aspect of the utility model provides a battery, comprising a plurality of battery cells arranged along a thickness direction, a temperature collection component is provided between large surfaces of the battery cells, the temperature collection component comprises: a circuit board and a thermistor, the circuit board extends along the large surface of the battery cells, and the thermistor is provided on the circuit board.

[0005] Optionally, the circuit board is a flexible circuit board.

[0006] Optionally, one or more thermistors are provided on the circuit board.

[0007] Optionally, a plurality of thermistors are arranged in rows spaced apart along a length direction of the circuit board, and the thermistors in each row are evenly distributed.

[0008] Optionally, an arrangement area for arranging the thermistor is formed between the large surfaces of the battery cell, and the arrangement area is 20-60 mm away from the bottom of the battery cell.

[0009] Optionally, the ratio of the height of the arrangement area to the height of the battery cell is 0.2-0.7.

[0010] Optionally, the length of the circuit board is 485-489 mm, and a portion of the circuit board extends out of the end surface of the battery cell, and the length of the circuit board extending out of the end surface of the battery cell is 1-3 mm.

[0011] Optionally, the temperature acquisition component further includes: a buffer material piece, the buffer material piece covers the circuit board and the thermistor, and the contact surface of the buffer material piece and the battery core forms a plane.

[0012] Optionally, the battery further comprises: an information collector, the information collector is arranged at the end of the battery cell, and the circuit board is connected to the information collector via a signal line.

[0013] A second aspect of the present invention provides an electrical device, comprising the battery described in the above embodiment.

[0014] The battery of the utility model arranges the temperature acquisition component composed of the circuit board and the thermistor between the large surfaces of the battery cell, which can accurately measure and feedback compensate the large surface temperature of the battery cell, effectively monitor the temperature change inside the battery cell, solve the safety hazards and risks of the internal temperature of the battery cell, and improve the safety of battery use.

[0015] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] Figure 1 is a structural schematic diagram of a battery according to an embodiment of the utility model;

[0018] Figure 2 is another structural schematic diagram of a battery according to an embodiment of the utility model;

[0019] Figure 3 is a cross-sectional view of a battery according to an embodiment of the utility model;

[0020] Figure 4 yes Figure 3 A partial enlarged view of the middle area A;

[0021] Figure 5 is another cross-sectional view of a battery according to an embodiment of the utility model;

[0022] Figure 6 is another cross-sectional view of a battery according to an embodiment of the utility model;

[0023] Figure 7 is a partial structural schematic diagram of a battery according to an embodiment of the utility model;

[0024] Figure 8It is a partial structural explosion diagram of a battery according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] Battery module 10; battery cell 11;

[0027] Temperature collection component 20; flexible circuit board 21; thermistor 22; buffer material 23;

[0028] Arrangement area 30;

[0029] Information collector 40; signal line 41;

[0030] Tray 51; partition 52; cold plate 53. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0034] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0035] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] In the specification and claims of the utility model, if the term "first" or "second" is involved, it may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the related objects are in an "or" relationship.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" involved 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] The battery according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0040] like Figure 1 , Figure 2 and Figure 8 As shown, the battery according to the embodiment of the utility model includes a plurality of battery cells 11 arranged along the thickness direction, a temperature collection component 20 is provided between the large surfaces of the battery cells 11, and the temperature collection component 20 includes: a circuit board and a thermistor 22, the circuit board extends along the large surface of the battery cell 11, and the thermistor 22 is provided on the circuit board.

[0041] In other words, if Figure 1 and Figure 2 As shown, the battery according to the embodiment of the utility model includes a plurality of battery cells 11 arranged along the thickness direction. The battery can be a large and thin battery, which can be called a blade battery or a paper battery. Figure 1 , Figure 2 , Figure 4 and Figure 8As shown, a temperature collection component 20 is provided between the large surfaces of the battery cell 11. The temperature collection component 20 can collect the temperature between the large surfaces of the battery cell 11, accurately measure and feedback compensate the large surface temperature of the battery cell 11, effectively monitor the temperature change inside the battery cell 11, solve the safety hazards and risks of the internal temperature increase of the battery cell 11, and improve the safety of battery use. The temperature collection component 20 is mainly composed of a circuit board and a thermistor 22. The circuit board extends along the large surface of the battery cell 11, and the thermistor 22 (NTC) is integrated on the circuit board.

[0042] It should be noted that the shape of the battery cell is usually a rectangular parallelepiped. When the overall length of the rectangular parallelepiped battery cell is large and the thickness is thin, it forms a shape similar to a blade, which can be called a blade battery or a paper battery. The large surface can be understood as the entire surface area of ​​the battery in the shape of a blade or a paper sheet. The thermistor 22 (NTC) is a component whose resistance value changes with temperature, and its resistance value decreases with increasing temperature. In the battery, the thermistor 22 is mainly used to detect the temperature of the battery cell 11, and plays a role in detecting, controlling and compensating the temperature. The correct arrangement of the NTC position can accurately measure the temperature of the battery cell 11. It is an important auxiliary component for displaying the remaining time of the battery and can ensure the optimal performance and safety of the battery.

[0043] Therefore, according to the battery of the embodiment of the utility model, the temperature acquisition component 20 composed of the circuit board and the thermistor 22 is set between the large surfaces of the battery cell 11, which can accurately measure and feedback compensate the large surface temperature of the battery cell 11, effectively monitor the internal temperature changes of the battery cell 11, solve the safety hazards and risks of the internal temperature of the battery cell 11, and improve the safety of battery use.

[0044] According to one embodiment of the utility model, the circuit board is a flexible circuit board 21. That is, the circuit board can adopt a flexible circuit board 21 (FPC), and the thermistor 22 is integrated on the flexible circuit board 21. The flexible circuit board 21 mainly uses polyimide (PI) as a substrate, and a series of processes are performed to generate a conductive circuit of the thermistor 22 on the substrate, which has the advantages of small size, thin thickness, light weight, etc.

[0045] According to one embodiment of the utility model, Figure 4 and Figure 6 As shown, a thermistor 22 can be provided on the circuit board. By providing a thermistor 22 between the large surfaces of the battery cell 11, the large surface temperature of the battery cell 11 can be accurately measured and feedback compensated, the internal temperature change of the battery cell 11 can be effectively monitored, the safety hazards and risks of the internal temperature increase of the battery cell 11 can be solved, and the safety of battery use can be improved.

[0046] In some specific embodiments of the present invention, Figure 5 and Figure 6 As shown, multiple thermistors 22 can be arranged on the circuit board. In the prior art, since the blade battery is long, the temperature of the large middle surface of the blade battery cannot be collected and measured. If the temperature in the middle of the blade battery is abnormal, it takes a long time for the temperature to be transferred to the end of the battery cell 11, and the thermistor 22 can collect the abnormal temperature signal and perform feedback compensation. The utility model arranges the thermistors 22 between the large surfaces of the blade battery, and for the battery cells 11 with higher risks, two to three thermistors 22 can be integrated on the flexible circuit board 21 (see Figure 6 ), monitor the temperature changes inside the battery cell 11 in real time, and effectively solve the safety hazards and risks of temperature rise inside the battery cell 11.

[0047] According to an embodiment of the present invention, a plurality of thermistors 22 are arranged in rows spaced apart along the length direction of the circuit board, and the thermistors 22 in each row are evenly distributed.

[0048] In other words, Figure 5 and Figure 6 As shown, multiple thermistors 22 can be distributed in rows along the length direction of the battery cell 11 , and the thermistors 22 in each row can be evenly distributed to monitor the temperature changes inside the battery cell 11 in real time, effectively solving the hidden safety hazards and risks of temperature rise inside the battery cell 11 .

[0049] Of course, those skilled in the art will understand that the battery includes a plurality of battery modules 10, each battery module 10 includes a plurality of battery cells 11, and two adjacent battery modules 10 can be separated by a partition 52. The battery module 10 can be placed on a tray 51, and structures such as cold plates 53 are provided at both ends of the tray 51. Therefore, in the present utility model, a flexible circuit board 21 with integrated thermistors 22 can be provided between the large surfaces of the battery cells 11 of each battery module 10 to monitor the temperature changes inside the battery cells 11 in real time, and effectively solve the safety hazards and risks of temperature rise inside the battery cells 11. In addition, the present application does not limit the number of thermistors 22 on the circuit board, and the number of thermistors 22 can be specifically set according to actual needs, which will not be described in detail in the present utility model.

[0050] According to an embodiment of the present invention, an arrangement area 30 for arranging thermistors 22 is formed between the large surfaces of the battery core 11 , and the arrangement area 30 is 20-60 mm away from the bottom of the battery core 11 .

[0051] In other words, a layout area 30 is formed between the large surfaces of the battery cell 11, and the layout area 30 is used to arrange the thermistor 22, wherein Figure 3 As shown, relative to the battery cell 11 with a height H of 90 mm, the distance between the arrangement area 30 and the bottom of the battery cell 11 is H1, and H1 is 20-60 mm, which facilitates the arrangement of the thermistor 22 and improves the detection accuracy of the thermistor 22.

[0052] According to an embodiment of the present invention, the ratio of the height of the arrangement area 30 to the height of the battery cell 11 is 0.2-0.7, which facilitates the arrangement of the thermistor 22 and improves the detection accuracy of the thermistor 22. Of course, those skilled in the art will understand that the height of the arrangement area 30 and the height of the battery cell 11 can be specifically set according to actual needs, and will not be described in detail in the present invention.

[0053] According to an embodiment of the present invention, the length of the circuit board is 485-489 mm, and a portion of the circuit board extends out of the end surface of the battery cell 11 , and the length of the circuit board extending out of the end surface of the battery cell 11 is 1-3 mm.

[0054] In other words, for a battery cell 11 with a length L of 485 mm, the length of the flexible circuit board 21 is 485-489 mm. A portion of the flexible circuit board 21 extends out of the end face of the battery cell 11, and the length of the circuit board extending out of the end face of the battery cell 11 is 1-3 mm. Optionally, the end face of the flexible circuit board 21 may extend beyond the end face of the battery cell 11 by 2 mm. Figure 6 As shown, for the battery cell 11 with higher risks, two to three NTC thermistors 22 can be integrated in the FPC flexible circuit board 21 and evenly distributed in the length direction of the battery cell 11 to monitor the internal temperature changes of the battery cell 11 in real time, effectively solving the safety hazards and risks of temperature rise inside the battery cell 11.

[0055] According to an embodiment of the present invention, the temperature acquisition component 20 further includes: a buffer material piece 23 , the buffer material piece 23 covers the circuit board and the thermistor 22 , and the contact surface between the buffer material piece 23 and the battery cell 11 forms a plane.

[0056] That is to say, Figure 4 and Figure 8 As shown, the temperature acquisition component 20 also includes a buffer material piece 23, and the buffer material piece 23 can be made of a thin, insulating and sticky buffer material. The buffer material piece 23 can be an aerogel insulation pad, a self-adhesive buffer mica sheet, etc. The aerogel insulation pad uses an aerogel composite material as the core, and a polymer film or a flame retardant coating as the packaging material, and is formed by hot pressing or coating. The utility model wraps a thin and sticky buffer material (for example, an aerogel insulation pad) on the outer layer of the flexible circuit board 21 and the thermistor 22. And because the thickness of the thermistor 22 is thicker than that of the flexible circuit board 21, the buffer material on the surface of the thermistor 22 is thinner than the buffer material of the flexible circuit board 21, ensuring that the buffer material and the large surface of the battery cell 11 are in contact with the flat surface, playing a role of buffering and bonding with the large surface of the battery cell 11, preventing the expansion force of the battery cell 11 and the extrusion between the battery cells 11 from damaging the thermistor 22, and also preventing the raised thermistor 22 from causing wear and deformation to the large surface of the battery cell 11.

[0057] In the present invention, the buffer material piece 23 can be an insulating high temperature resistant buffer material, but is not limited to a specific material, such as an aerogel insulation pad, a self-adhesive buffer mica sheet, etc. Any buffer material that meets the requirements can be used.

[0058] According to an embodiment of the present invention, the battery further includes: an information collector 40 , which is disposed at the end of the battery cell 11 , and the circuit board is connected to the information collector 40 via a signal line 41 .

[0059] That is to say, Figure 7 As shown, the battery also includes: an information collector 40, the information collector 40 (BIC) is arranged at the end of the battery cell 11, and the circuit of the flexible circuit board 21 can extend to the outside of the battery cell 11 and connect with the information collector 40 arranged on the end face of the battery cell 11, and the temperature control is achieved by collecting the feedback temperature signal by the information collector 40.

[0060] The battery of the utility model can be a blade battery, and the length of the blade battery is not fixed, and it can be a long blade or a short blade. The blade battery can be a battery pack of lithium iron phosphate battery cells 11, or a power battery pack composed of a mixture of ternary battery cells 11 or battery cells 11 of other materials. There is no limit to the number of thermistors 22 in the battery pack, and multiple thermistors 22 can be arranged in a single temperature collection component 20, or temperature collection components 20 can be arranged on a large surface of multiple battery cells 11.

[0061] In summary, according to the battery of the embodiment of the utility model, the temperature acquisition component 20 composed of the circuit board and the thermistor 22 is arranged between the large surface of the battery cell 11, which can accurately measure and feedback compensate the large surface temperature of the battery cell 11, effectively monitor the temperature change inside the battery cell 11, solve the safety hazards and risks of the internal temperature increase of the battery cell 11, and improve the safety of battery use. At the same time, the utility model wraps a thin and sticky buffer material (for example, an aerogel insulation pad) on the outer layer of the flexible circuit board 21 and the thermistor 22. And because the thickness of the thermistor 22 is thicker than that of the flexible circuit board 21, the buffer material on the surface of the thermistor 22 is thinner than that of the flexible circuit board 21, ensuring that the buffer material is flat in contact with the large surface of the battery cell 11, playing a role of buffering and bonding with the large surface of the battery cell 11, preventing the expansion force of the battery cell 11 and the extrusion between the battery cells 11 from damaging the thermistor 22, and also preventing the raised thermistor 22 from causing wear and deformation to the large surface of the battery cell 11.

[0062] Of course, for those skilled in the art, other structures and working principles of the battery are understandable and achievable, and will not be described in detail in the present invention.

[0063] According to the second aspect of the utility model, an electrical device is provided, including the battery in the above embodiment. Since the battery according to the embodiment of the utility model has the above technical effects, the electrical device according to the embodiment of the utility model should also have the corresponding technical effects, that is, the electrical device of the utility model adopts the battery, which can accurately measure and feedback compensate the large surface temperature of the battery cell 11, effectively monitor the temperature change inside the battery cell 11, solve the safety hazards and risks of the internal temperature increase of the battery cell 11, and improve the safety of battery use. At the same time, it can effectively prevent the expansion force of the battery cell 11 and the extrusion between the battery cells 11 from damaging the thermistor 22, and also prevent the raised thermistor 22 from causing wear and deformation on the large surface of the battery cell 11, thereby improving the safety of the use of the electrical equipment.

[0064] Of course, for those skilled in the art, other structures and working principles of the electrical equipment are understandable and achievable, and will not be described in detail in the present utility model.

[0065] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery, characterized in that: It comprises a plurality of battery cells arranged along the thickness direction, a temperature collection component is arranged between the large surfaces of the battery cells, the temperature collection component comprises: a circuit board and a thermistor, the circuit board extends along the large surface of the battery cells, and the thermistor is arranged on the circuit board.

2. The battery according to claim 1, characterized in that The circuit board is a flexible circuit board.

3. The battery according to claim 1, characterized in that One or more thermistors are arranged on the circuit board.

4. The battery according to claim 3, characterized in that The plurality of thermistors are arranged in rows at intervals along the length direction of the circuit board, and the thermistors in each row are evenly distributed.

5. The battery according to claim 4, characterized in that An arrangement area for arranging the thermistor is formed between the large surfaces of the battery cells, and the arrangement area is 20-60 mm away from the bottom of the battery cells.

6. The battery according to claim 5, characterized in that The ratio of the height of the arrangement area to the height of the battery cell is 0.2-0.

7.

7. The battery according to claim 1, characterized in that The length of the circuit board is 485-489 mm, and a portion of the circuit board extends out of the end surface of the battery cell. The length of the circuit board extending out of the end surface of the battery cell is 1-3 mm.

8. The battery according to claim 1, characterized in that The temperature acquisition component further includes: a buffer material piece, the buffer material piece covers the circuit board and the thermistor, and the contact surface of the buffer material piece and the battery core forms a plane.

9. The battery according to claim 7, characterized in that Also includes: An information collector is arranged at the end of the battery cell, and the circuit board is connected to the information collector through a signal line.

10. An electrical device, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

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