Temperature monitoring protection plate, battery and electric device

Abstract

The utility model discloses a temperature monitoring protection board, battery and electrical equipment, the temperature monitoring protection board is including the substrate, is provided with the isolation area on the substrate, there is no metal layer in the isolation area, the isolation area divides the circuit layer on the substrate into first area and second area, sets up the temperature sensor for carrying out temperature detection to the heat source of monitoring in the first area, sets up other electronic components except the temperature sensor in the temperature monitoring circuit in the second area. Since there is no metal layer in the isolation area, equivalent to through the physical isolation of temperature sensor and other heating electronic components, make temperature sensor can detect the temperature of the heat source of monitoring specially, and is not influenced by other heating electronic components, has improved temperature sensor's temperature detection precision significantly.

Description

Technical Field

[0001] This utility model relates to the field of battery temperature monitoring, and in particular to a temperature monitoring protection board, a battery, and an electrical device. Background Technology

[0002] Existing temperature monitoring and protection boards for heat sources (such as batteries) use NTC (negative temperature coefficient thermistor) temperature sensors to monitor battery temperature in real time. However, when the temperature sensor is near other heat-generating electronic components on the protection board, the temperature rise generated by these components significantly affects the temperature sensor's detection accuracy, leading to misjudgments of the battery temperature by the entire device. This can result in problems such as abnormal charging and discharging, and failure of over-temperature protection. Summary of the Invention

[0003] This utility model provides a temperature monitoring and protection board, a battery, and an electrical device to solve the problem that the temperature sensor on the existing temperature monitoring and protection board is affected by other heat-generating electronic components, resulting in a decrease in the temperature detection accuracy of the heat source to be monitored.

[0004] In one embodiment, a temperature monitoring and protection board is provided, the temperature monitoring and protection board comprising:

[0005] A substrate is provided with an isolation region, the isolation region having no metal layer, the isolation region dividing the circuit layer on the substrate into a first region and a second region, a temperature sensor for detecting the temperature of a heat source to be monitored is provided in the first region, and other electronic components of the temperature monitoring circuit other than the temperature sensor are provided in the second region.

[0006] In one embodiment, the width of the isolation area is greater than or equal to 4 mm.

[0007] In one embodiment, the first region is located on the side of the substrate.

[0008] In one embodiment, the width of the first region is greater than or equal to 2 mm, and the length is greater than or equal to 4 mm.

[0009] In one embodiment, the width of the first region is 2 mm and the length is 4 mm.

[0010] In one embodiment, the other heat-generating electronic components in the temperature monitoring circuit, excluding the temperature sensor, are spaced apart from the temperature sensor by a predetermined first distance.

[0011] In one embodiment, the first spacing is greater than or equal to 12 mm.

[0012] In one embodiment, a battery is provided, the battery including a temperature monitoring and protection board from any of the preceding embodiments.

[0013] In one embodiment, the battery includes a cell structure, and the temperature monitoring and protection board is attached to the cell structure.

[0014] In one embodiment, an electrical device is provided, the electrical device including the battery in the previous embodiment.

[0015] This utility model provides a temperature monitoring protection board, a battery, and an electrical device. By setting an isolation region on the substrate of the protection board, the isolation region divides the circuit layer of the substrate into two regions. A temperature sensor is set in one region for real-time detection of the temperature of the heat source to be monitored, and other electronic components of the temperature monitoring circuit, excluding the temperature sensor, are set in the other region. Since there is no metal layer in the isolation region, it is equivalent to physically isolating the temperature sensor from other heat-generating electronic components. This allows the temperature sensor to focus solely on detecting the temperature of the heat source to be monitored, without being affected by other heat-generating electronic components, significantly improving the temperature detection accuracy of the temperature sensor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a temperature monitoring and protection board in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram comparing the temperature detection curve results in one embodiment of this utility model;

[0019] The labeling is explained as follows:

[0020] 10. Isolation area; 20. First area; 30. Second area. Detailed Implementation

[0021] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0022] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0023] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0024] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0025] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0026] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0027] In one embodiment, such as Figure 1 As shown, a temperature monitoring and protection board is provided, the temperature monitoring and protection board comprising:

[0028] A substrate has an isolation region 10 on it. The isolation region 10 has no metal layer and divides the circuit layer on the substrate into a first region 20 and a second region 30. A temperature sensor for detecting the temperature of a heat source to be monitored is disposed in the first region 20, and other electronic components of the temperature monitoring circuit, excluding the temperature sensor, are disposed in the second region 30. For example... Figure 1 The electronic components in the second area 30 include switching transistors Q1 and QR, resistors R1, R2, RD1, etc., capacitors C2, C3, etc., as well as control chip U1, pads B+ and B-.

[0029] Among them, the temperature detection and protection board can be a circuit board used to detect the temperature of the heat source to be monitored. The circuit board includes a substrate, and a temperature monitoring circuit is printed in the circuit layer of the substrate. The temperature monitoring circuit is a conventional detection circuit that includes a temperature sensor and other electronic components (such as MOSFETs, sampling resistors, high-current copper foil, etc.).

[0030] In this embodiment, the isolation region 10 has no metal layer. Since the substrate includes an upper metal layer, a dielectric layer, and a lower metal layer, the removal of the metal layer in the substrate within the isolation region 10 is equivalent to creating a heat insulation region between the first region 20 and the second region 30 of the substrate. This prevents the heat from being transferred to the first region 20 even when the electronic components in the second region 30 generate heat during operation. Consequently, the temperature sensor in the first region 20 is not affected by the heat generated by the electronic components in the second region 30, allowing for more accurate detection of the temperature of the heat source to be monitored.

[0031] For example, the heat source to be monitored can be a battery or other heat sources, such as power devices. When the heat source to be monitored is a battery, the temperature detection and protection board is the battery's protection circuit board.

[0032] This utility model provides a temperature monitoring protection board, a battery, and an electrical device. By setting an isolation region 10 on the substrate of the protection board, the isolation region 10 divides the circuit layer of the substrate into two regions. A temperature sensor is set in one region for real-time detection of the temperature of the heat source to be monitored, and other electronic components of the temperature monitoring circuit other than the temperature sensor are set in the other region. Since there is no metal layer in the isolation region 10, it is equivalent to physically isolating the temperature sensor from other heat-generating electronic components, allowing the temperature sensor to focus solely on detecting the temperature of the heat source to be monitored without being affected by other heat-generating electronic components, thus significantly improving the temperature detection accuracy of the temperature sensor.

[0033] It should be noted that since the improvement in this embodiment lies in the setting of the isolation area 10 of the temperature monitoring protection board and the position layout of the temperature sensor, the improvement does not lie in the specific temperature monitoring circuit. Therefore, it is not necessary to describe the specific structure of the temperature monitoring circuit in detail. A conventional temperature monitoring circuit containing a temperature sensor can be used to achieve temperature detection.

[0034] In one embodiment, the width of the isolation region 10 is greater than or equal to 4 mm.

[0035] For example, the width of the isolation area 10 can be 4mm, 5mm, 6mm, 7mm, 8mm, etc., and the width can be set according to specific requirements. However, the width of the isolation area 10 must be at least 4mm to ensure the physical isolation effect between the temperature sensor and other electronic components.

[0036] In one embodiment, the first region 20 is located on the side of the substrate. Here, "side of the substrate" refers to the edge of the substrate, which only needs to be large enough to accommodate a temperature sensor.

[0037] In this embodiment, the position of the first region 20 where the temperature sensor is placed has been optimized, so that the temperature sensor is as far away as possible from other electronic components on the protection board that are prone to heat generation. This further improves the physical isolation between the temperature sensor and other electronic components and significantly improves the temperature detection accuracy of the temperature sensor.

[0038] In one embodiment, the width of the first region 20 is greater than or equal to 2 mm, and the length is greater than or equal to 4 mm.

[0039] The width of the first region 20 can be 2mm, 3mm, 4mm, etc., and the length can be 4mm, 5mm, 6mm, 7mm, etc. The first region 20 can be rectangular or other shapes, such as L-shaped, as long as the size of the first region 20 is sufficient to achieve physical isolation between the temperature sensor and other electronic components.

[0040] In one embodiment, the width of the first region 20 is 2mm and the length is 4mm. That is, the minimum size of the first region 20 can be 2mm in width and 4mm in length, which is sufficient to achieve physical isolation between the temperature sensor and other electronic components, and avoid the influence of other heat-generating electronic components on the detection accuracy of the temperature sensor.

[0041] In one embodiment, the other heat-generating electronic components in the temperature monitoring circuit, excluding the temperature sensor, are spaced apart from the temperature sensor by a predetermined first distance.

[0042] The first spacing is the arrangement distance between the temperature sensor located in the first region 20 and other heat-generating electronic components located in the second region 30. Its function is to increase the physical distance between the temperature sensor and other heat-generating electronic components, reduce the influence of other heat-generating electronic components, and significantly improve the temperature detection accuracy of the temperature sensor.

[0043] In one embodiment, the first spacing is greater than or equal to 12 mm.

[0044] The first spacing can be 12mm, 13mm, 14mm, 15mm, etc. For example, other heat-generating electronic components are located at the center of the protection board, while the range of the first spacing is greater than or equal to 12mm, which improves the physical isolation effect between the temperature sensor and other heat-generating electronic components, thereby improving the detection accuracy of the temperature sensor.

[0045] The applicant discovered that when the temperature sensor on the battery's protection circuit board is placed near other heat-generating electronic components, the temperature rise of these components significantly affects the sensor's detection accuracy, leading to misjudgments of the battery temperature by the protection circuit board. This, in turn, causes problems such as abnormal charging and discharging, and failure of over-temperature protection. While some existing solutions attempt to improve temperature measurement accuracy through software compensation, these methods are costly.

[0046] Based on the above considerations, in one embodiment, a battery is provided, the battery comprising: a casing, a battery body inside the casing, and a protection circuit board, the protection circuit board being a temperature monitoring protection board in any of the preceding embodiments.

[0047] In this embodiment, the battery, by setting a protective circuit board with an isolation area 10, achieves physical isolation between the temperature sensor and other heat-generating electronic components, ensuring that the deviation between the NTC-detected temperature and the actual battery temperature is ≤±1℃; significantly improving temperature detection accuracy and avoiding system misjudgments caused by temperature rise interference. Furthermore, no additional hardware or software is required for temperature compensation, reducing the production cost of the circuit board; improving battery charging and discharging safety, and extending battery life.

[0048] In one embodiment, the battery body described above is a cell structure, and the temperature monitoring and protection board is attached to the cell structure. For example, the temperature monitoring and protection board can be attached to the cell structure via injection molding. Without interference from other heat sources, the temperature sensor can accurately detect the battery temperature regardless of its position on the protection board.

[0049] For example, such as Figure 2 The red curve shown is the temperature monitoring curve of the battery by the temperature monitoring protection board without an isolation area. The blue curve is the temperature monitoring curve of the battery by the temperature monitoring protection board with an isolation area in this embodiment. The orange curve is the actual temperature curve of the battery cell surface. The green curve is the reference curve of the ambient temperature. By comparison, it can be clearly seen that the temperature monitoring protection board without an isolation area detects the battery temperature 3°C to 4°C higher than the actual temperature. In contrast, the temperature monitoring protection board with an isolation area in this embodiment detects the battery temperature less than or equal to 1°C higher than the actual temperature. Therefore, the temperature monitoring protection board with an isolation area in this embodiment detects the battery temperature more closely than the actual temperature.

[0050] In one embodiment, an electrical device is provided, which includes the battery described in the previous embodiment. This electrical device can be an electronic device, a transportation device, or the like.

[0051] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A temperature monitoring and protection board, characterized in that, The temperature monitoring and protection board includes: A substrate is provided with an isolation region, the isolation region having no metal layer, the isolation region dividing the circuit layer on the substrate into a first region and a second region, a temperature sensor for detecting the temperature of a heat source to be monitored is provided in the first region, and other electronic components of the temperature monitoring circuit other than the temperature sensor are provided in the second region.

2. The temperature monitoring and protection board according to claim 1, characterized in that, The width of the isolation area is greater than or equal to 4 mm.

3. The temperature monitoring and protection board according to claim 1, characterized in that, The first region is located on the side of the substrate.

4. The temperature monitoring and protection board according to claim 3, characterized in that, The width of the first region is greater than or equal to 2 mm, and the length is greater than or equal to 4 mm.

5. The temperature monitoring and protection board according to claim 4, characterized in that, The width of the first region is 2mm and the length is 4mm.

6. The temperature monitoring and protection board according to claim 1, characterized in that, In the temperature monitoring circuit, other heat-generating electronic components besides the temperature sensor are spaced apart from the temperature sensor by a predetermined first distance.

7. The temperature monitoring and protection board according to claim 6, characterized in that, The first spacing is greater than or equal to 12 mm.

8. A battery, characterized in that, The battery includes the temperature monitoring and protection board as described in any one of claims 1 to 7.

9. The battery according to claim 8, characterized in that, The battery includes a cell structure, and the temperature monitoring and protection board is attached to the cell structure.

10. An electrical appliance, characterized in that, The electrical device includes the battery as described in claim 9.

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