Protection plate, battery and electric equipment

Abstract

The utility model relates to a protection plate, a battery and electric equipment. The protection plate comprises a first circuit board, a second circuit board, an electronic element and a temperature sensor, the number of the second circuit boards is multiple, and the multiple second circuit boards are all connected to the first circuit board and all protrude out of the first circuit board. The electronic element is mounted on the first circuit board; and each second circuit board is provided with one temperature sensor. In this way, the temperature sensor can be arranged farther away from the electronic element, so that the adverse effect of heat generated by the electronic element on the temperature sensor is reduced, and the temperature detection precision of the temperature sensor on target objects such as a battery cell is improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery safety technology and relates to a protection board, a battery and electrical equipment. Background Technology

[0002] To improve battery safety, most batteries are equipped with a protection board. This protection board includes a circuit board and corresponding electronic components mounted on it, enabling it to provide short-circuit and overcurrent protection for the battery cells. Electronic components include field-effect transistors, three-terminal fuses, and current-sensing resistors, among others.

[0003] In addition, in order to detect whether the temperature of the battery cell is too high, temperature sensors such as NTC (Negative Temperature Coefficient) are also installed on the circuit board to detect the temperature of the battery cell.

[0004] However, in actual operation, the heat generated by the electronic components of the protection board can adversely affect the temperature acquisition of the temperature sensor, thereby reducing the accuracy of the temperature sensor in detecting the temperature of the battery cell. Utility Model Content

[0005] To address the problem that the heat generated by the electronic components of the protection board in related technologies can adversely affect the temperature acquisition of the temperature sensor, a protection board, battery, and electrical device are provided.

[0006] To solve the above-mentioned technical problems, on the one hand, this utility model provides a protection board, including a first circuit board, a second circuit board, electronic components, and a temperature sensor; there are multiple second circuit boards, each of which is connected to the first circuit board and protrudes from the first circuit board; the electronic components are mounted on the first circuit board; and the temperature sensor is mounted on each of the second circuit boards.

[0007] Optionally, in the first direction, each of the second circuit boards protrudes from the same side of the first circuit board, and the second circuit boards are arranged sequentially at intervals along the second direction; in the first direction, the temperature sensors on each of the second circuit boards are located on the same side of the first circuit board; the first direction, the second direction, and the thickness direction of the first circuit board intersect each other.

[0008] Optionally, in the first direction, each of the temperature sensors is spaced apart from the first circuit board.

[0009] Optionally, the temperature sensor is a patch sensor.

[0010] Optionally, the second circuit board is provided with solder pads for soldering the target object.

[0011] To address the aforementioned technical problems, this utility model provides a battery, including a battery cell and a protection board as described in any of the above-mentioned embodiments; the electronic components are electrically connected to the tabs of the battery cell; and the temperature sensor is used to detect the temperature of the battery cell.

[0012] Optionally, the number of battery cells is multiple; in the first direction, each battery cell and each second circuit board are located on the same side of the first circuit board; in the second direction, each battery cell is arranged in sequence at intervals; in the second direction, the temperature sensor is provided between adjacent battery cells; the first direction, the second direction and the thickness direction of the first circuit board intersect each other.

[0013] Optionally, in the second direction, a temperature sensor on one of the second circuit boards is located between a group of adjacent battery cells.

[0014] Optionally, the second circuit board is fixedly connected to the housing of the battery cell.

[0015] Optionally, the temperature sensor is spaced apart from the battery cell; the battery also includes an insulating thermally conductive adhesive that connects the battery cell and the temperature sensor.

[0016] To address the aforementioned technical problems, this utility model provides an electrical device that includes the battery described in any of the above embodiments.

[0017] In the protection board, battery, and electrical equipment provided in this embodiment of the utility model, the electronic components are set on the first circuit board, and the temperature sensor is set on the second circuit board. This allows the temperature sensor to be set further away from the electronic components, thereby reducing the adverse effects of the heat generated by the electronic components on the temperature sensor, and thus improving the temperature detection accuracy of the temperature sensor for target objects such as battery cells.

[0018] Furthermore, the temperature sensors on each of the second circuit boards can detect different target objects separately, thereby providing temperature detection results for different target objects. Alternatively, some temperature sensors on the second circuit boards can simultaneously detect different areas of the same target object, thereby improving the temperature detection effect for that target object. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a protective plate provided in one embodiment of the present invention. Figure 1 ;

[0020] Figure 2This is a schematic diagram of the structure of a protective plate provided in one embodiment of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of a battery provided in one embodiment of the present invention. Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the structure of a battery provided in one embodiment of the present invention. Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the structure of a battery provided in one embodiment of the present invention. Figure 3 ;

[0024] Figure 6 This is a schematic diagram of the structure of a battery provided in one embodiment of the present invention. Figure 4 .

[0025] The reference numerals in the accompanying drawings are as follows:

[0026] 10. Protection board; 20. Battery cell; 30. Insulating and thermally conductive adhesive; 40. Housing;

[0027] 1. First circuit board; 11. First surface; 12. Second surface;

[0028] 2. Second circuit board; 21. Third surface; 22. Fourth surface;

[0029] 3. Electronic components;

[0030] 4. Temperature sensor;

[0031] 5. Solder pads. Detailed Implementation

[0032] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] like Figure 1 and Figure 2 As shown, in one embodiment, the protective plate 10 is used to protect the target object. The protective plate 10 includes a first circuit board 1, a second circuit board 2, an electronic component 3, and a temperature sensor 4. The second circuit board 2 is connected to the first circuit board 1 and protrudes from the first circuit board 1. The electronic component 3 is mounted on the first circuit board 1. The temperature sensor 4 is mounted on the second circuit board 2.

[0034] Among them, electronic component 3 can be electrically connected to the target object to form a corresponding protection circuit, thereby protecting the target object. Temperature sensor 4 is used to detect whether the temperature of the target object is too high.

[0035] In this embodiment, electronic components 3 are disposed on the first circuit board 1, and temperature sensor 4 is disposed on the second circuit board 2. This allows the temperature sensor 4 to be disposed further away from the electronic components 3, thereby reducing the adverse effects of the heat generated by the electronic components 3 on the temperature sensor 4 and improving the temperature detection accuracy of the temperature sensor 4 on the target object.

[0036] Furthermore, through the settings of this embodiment, the length of the second circuit board 2 and the installation position of the temperature sensor 4 can be reasonably set according to the detection needs, so that the temperature sensor 4 can be placed in a suitable position on the target object, thereby improving the temperature monitoring effect of the target object.

[0037] Among them, reference Figure 3 As shown, the target object can be a battery cell 20, etc. Additionally, the temperature sensor 4 is connected to a corresponding processor, which processes the detection results from the temperature sensor 4.

[0038] In one embodiment, the second circuit board 2 protrudes from the first circuit board 1 in a first direction, wherein the first direction intersects with the thickness direction of the first circuit board 1, that is, the first direction does not coincide with and is not parallel to the thickness direction of the first circuit board 1.

[0039] In one scenario, the first direction is perpendicular to the thickness direction of the first circuit board 1. This first direction can be the width direction of the first circuit board 1.

[0040] exist Figure 1 and Figure 2 In the directions shown, the width direction of the first circuit board 1 is parallel to the X-axis, the length direction of the first circuit board 1 is parallel to the Y-axis, and the thickness direction of the first circuit board 1 is parallel to the Z-axis. The X-axis, Y-axis, and Z-axis are perpendicular to each other in pairs. The length direction of the second circuit board 2 is parallel to the X-axis, the width direction of the second circuit board 2 is parallel to the Y-axis, and the thickness direction of the second circuit board 2 is parallel to the Z-axis.

[0041] like Figure 2As shown, in one embodiment, the maximum size of the first circuit board 1 and the maximum size of the second circuit board 2 can be the same in the Z-axis direction. Specifically, in the Z-axis direction, the first circuit board 1 has a first surface 11 and a second surface 12 arranged in parallel, and the second circuit board 2 has a third surface 21 and a fourth surface 22 arranged in parallel. The first surface 11, the second surface 12, the third surface 21, and the fourth surface 22 are all planar. The distance between the first surface 11 and the second surface 12 in the Z-axis is the maximum size of the first circuit board 1 in the Z-axis, and the distance between the third surface 21 and the fourth surface 22 in the Z-axis is the maximum size of the second circuit board 2 in the Z-axis. The first surface 11 and the third surface 21 are flush, and the second surface 12 and the fourth surface 22 are flush.

[0042] In one embodiment, the temperature sensor 4 is spaced apart from the first circuit board 1 in a first direction, so that the temperature sensor 4 can be further away from the electronic component 3.

[0043] In one embodiment, the electronic component 3 is typically mounted on the same side of the first circuit board 1 in the thickness direction, and the temperature sensor 4 is mounted on one side of the second circuit board 2 in the thickness direction. Furthermore, in the Z-axis direction, the electronic component 3 and the temperature sensor 4 may be located on the same side of the first circuit board 1. Figure 2 In the example shown, electronic components are mounted on the first surface 11, and a temperature sensor is mounted on the third surface 21.

[0044] In one embodiment, both the first circuit board 1 and the second circuit board 2 can be PCBs (PCB is an abbreviation for Printed Circuit Board).

[0045] In one embodiment, the first circuit board 1 and the second circuit board 2 may be an integral structure; or, the first circuit board 1 and the second circuit board 2 may be independently set and fixed together by means of adhesive or the like.

[0046] Furthermore, the first circuit board 1 and the second circuit board 2 can be electrically connected, and corresponding leads on the second circuit board 2 can lead the corresponding pins of the temperature sensor 4 to the first circuit board 1. In subsequent use, the processor can be mounted on the first circuit board 1, or the processor can be located outside the first circuit board 1 and electrically connected to the temperature sensor through the first circuit board 1. When the first circuit board 1 and the second circuit board 2 are set independently, they can be electrically connected by means of soldering or other methods.

[0047] In one embodiment, electronic component 3 includes at least one of components such as a field-effect transistor, a three-terminal fuse, and a current-sensing resistor.

[0048] In one embodiment, the temperature sensor 4 is a surface-mount sensor. In this case, the temperature sensor 4 can be mounted on the second circuit board 2 using a surface-mount soldering method. This configuration improves the mounting reliability of the temperature sensor 4 on the second circuit board 2 and effectively prevents the temperature sensor 4 from detaching from the second circuit board 2.

[0049] In one embodiment, the temperature sensor 4 may be a negative temperature coefficient thermistor.

[0050] like Figure 1 As shown, in one embodiment, there are multiple second circuit boards 2, each connected to and protruding from the first circuit board 1. Each second circuit board 2 is equipped with a temperature sensor 4. In use, the temperature sensors 4 on each second circuit board 2 can detect different target objects separately, or some temperature sensors 4 on some second circuit boards 2 can simultaneously detect different areas of the same target object. "Multiple" means two or more, and the meaning of the term "multiple" is the same in all embodiments and will not be repeated hereafter.

[0051] like Figure 1 As shown, in one embodiment, in the first direction, each second circuit board 2 protrudes from the same side of the first circuit board, and each second circuit board 2 is arranged sequentially at intervals along the length direction of the second direction; in the width direction of the first circuit board 1, the temperature sensor 4 on each second circuit board 2 is located on the same side of the first circuit board 1; the first direction, the second direction and the thickness direction of the first circuit board intersect each other.

[0052] That is, the second direction does not coincide with or parallel to the second direction, and the second direction does not coincide with or parallel to the thickness direction of the first circuit board 1.

[0053] In one scenario, the first direction, the second direction, and the thickness direction of the first circuit board are perpendicular to each other. In this case, the first direction can be the width direction of the first circuit board 1, and the second direction can be the length direction of the circuit board.

[0054] In addition, each temperature sensor 4 is spaced apart from the first circuit board 1 along the width direction of the first circuit board 1.

[0055] like Figure 1 As shown, in one embodiment, a temperature sensor 4 is mounted on a second circuit board 2. Alternatively, the temperature sensors 4 on each second circuit board 2 can have the same configuration.

[0056] like Figure 1As shown, in one embodiment, the second circuit board 2 is provided with solder pads 5, which are used for soldering target objects. When the protection board 10 is applied to protect the battery cell 20, the solder pads 5 can be soldered to the battery cell 20 shell, thereby fixing the second circuit board 2 and the battery cell 20 shell together, so that the relative position of the temperature sensor 4 and the battery cell 20 can be kept stable.

[0057] like Figures 3 to 6 As shown, this embodiment of the present invention also provides a battery, which includes a battery cell 20 and a protection board 10 as described in any of the above embodiments. The protection board 10 is used to protect the battery cell 20. The electronic component 3 is electrically connected to the tabs of the battery cell 20; the temperature sensor 4 is used to detect the temperature of the battery cell 20.

[0058] The arrangement in this embodiment allows the temperature sensor 4 to be positioned further away from the electronic component 3, thereby reducing the adverse effects of the heat generated by the electronic component 3 on the temperature sensor 4 and improving the temperature detection accuracy of the temperature sensor 4 on the battery cell 20.

[0059] like Figures 3 to 6 As shown, in one embodiment, the temperature sensor 4 is spaced apart from the battery cell 20. This avoids short-circuiting the temperature sensor 4, improving its lifespan and detection accuracy. The battery also includes an insulating thermally conductive adhesive 30, which connects the battery cell 20 and the temperature sensor 4, thus improving the accuracy of the temperature sensor 4 in detecting the temperature of the battery cell 20.

[0060] Among them, the insulating and thermally conductive adhesive 30 can be silicone or the like.

[0061] like Figure 3 and Figure 4 As shown, in one embodiment, there are multiple battery cells 20; in the first direction, each battery cell 20 and each second circuit board 2 are located on the same side of the first circuit board 1; in the second direction, each battery cell 20 is arranged in sequence at intervals; and in the second direction, a temperature sensor 4 is provided between adjacent battery cells 20.

[0062] During operation, the temperature sensor 4 located between adjacent cells 20 can detect the temperature of cells 20 on both sides, which reduces the processing power requirements of the processor and thus reduces costs.

[0063] Additionally, along the length of the first circuit board 1, adjacent battery cells 20 are defined as battery cell A and battery cell B, and the gap between battery cell A and battery cell B is called gap A. Along the length of the first circuit board 1, a temperature sensor 4 located between battery cell A and battery cell B is called sensor A. The relative positions of battery cell A and battery cell B with respect to sensor A can include the following two scenarios: sensor A is located within gap A (see reference). Figure 4Alternatively, sensor A may be located outside gap A (see reference). Figure 3 ).

[0064] In one embodiment, in the second direction, a temperature sensor 4 on a second circuit board 2 is located between a group of adjacent battery cells 20.

[0065] Specifically, when the number of battery cells 20 on the same side of the first circuit board 1 in the first direction is N, where N is greater than or equal to 2, and these battery cells 20 are arranged along the second direction, the battery has N-1 groups of adjacent battery cells 20. At this time, the number of second circuit boards 2 is also N-1.

[0066] In a real-world scenario, the multiple cells 20 in the battery are all located on the same side of the first circuit board 1 in the first direction, and the cells 20 are arranged along the second length direction. The number of second circuit boards 2 is one less than the number of cells 20, and a temperature sensor 4 is set on each second circuit board 2.

[0067] In one embodiment, the second circuit board 2 is fixedly connected to the housing of the battery cell 20. Specifically, when a temperature sensor 4 mounted on one of the second circuit boards 2 is located between a group of adjacent battery cells 20, the second circuit board 2 can be fixedly connected to the housings of two of the adjacent battery cells 20. Alternatively, the second circuit board 2 can be fixedly connected to the housing of the battery cell 20 by soldering; specifically, the housing of the battery cell 20 can be soldered onto the pads 5 of the second circuit board.

[0068] In one embodiment, the battery cell 20 and the temperature sensor 4 are located on the same side of the second circuit board 2 in the thickness direction of the first circuit board 1, which can improve the accuracy of temperature detection of the battery cell 20.

[0069] In one embodiment, the second circuit board 2 is opposite to the battery cell 20 in the thickness direction of the first circuit board 1, or the second circuit board 2 is offset from the battery cell 20 in the thickness direction of the first circuit board 1.

[0070] The phrase "in the thickness direction of the first circuit board 1, the second circuit board 2 is opposite to the battery cell 20" means that in an orthographic projection on a plane perpendicular to the Z-axis, the projections of the second circuit board 2 and the battery cell 20 at least partially overlap. The phrase "in the thickness direction of the first circuit board 1, the second circuit board 2 is offset from the battery cell 20" means that in an orthographic projection on a plane perpendicular to the Z-axis, the projections of the second circuit board 2 and the battery cell 20 do not overlap.

[0071] like Figure 5 and Figure 6As shown, in one embodiment, the battery further includes a housing 40, within which the battery cell 20 and the protection plate 10 are mounted. The housing 40 is an insulating housing made of insulating material. The housing 40 can position and support the protection plate 10 and the battery cell 20.

[0072] This utility model embodiment also provides an electrical device, which includes the battery described in any of the above embodiments. The electrical device can be a computer, a car, or an aircraft, etc.

[0073] It should be understood that the above-mentioned design can also be replaced in other ways, such as:

[0074] In other embodiments, either the first circuit board 1 or the second circuit board 2 may also be a flexible circuit board.

[0075] In other embodiments, the electronic component 3 and the temperature sensor 4 may be located on different sides of the first circuit board 1 in the Z-axis direction. For example, the electronic component 3 may be mounted on the first surface 11 and the temperature sensor 4 may be mounted on the fourth surface 22; or the electronic component 3 may be mounted on the second surface 12 and the temperature sensor 4 may be mounted on the third surface 21.

[0076] In other embodiments, the temperature sensor 4 may also be a plug-in NTC.

[0077] In other embodiments, the temperature sensor 4 may also be a positive temperature coefficient thermistor.

[0078] In other embodiments, a second circuit board 2 may also be equipped with multiple temperature sensors 4. In this case, the multiple temperature sensors 4 on the second circuit board 2 may be arranged sequentially along the width direction of the first circuit board 1.

[0079] In other embodiments, the temperature sensor 4 may also be in direct contact with the battery cell 20.

[0080] In other embodiments, the second circuit board 2 and the outer casing of the battery cell 20 can also be fixedly connected by means of adhesive or other methods.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 protective plate, characterized in that, Includes a first circuit board, a second circuit board, electronic components, and a temperature sensor; There are multiple second circuit boards, each of which is connected to the first circuit board and protrudes from the first circuit board; The electronic components are mounted on the first circuit board; The temperature sensor is installed on each of the second circuit boards.

2. The protective plate according to claim 1, characterized in that, In the first direction, each of the second circuit boards protrudes from the same side of the first circuit board, and the second circuit boards are arranged at intervals along the second direction. In the first direction, the temperature sensors on each of the second circuit boards are located on the same side of the first circuit board; The first direction, the second direction, and the thickness direction of the first circuit board intersect each other.

3. The protective plate according to claim 2, characterized in that, In the first direction, each of the temperature sensors is spaced apart from the first circuit board.

4. The protective plate according to claim 1, characterized in that, The temperature sensor is a patch sensor.

5. The protective plate according to claim 1, characterized in that, The second circuit board is provided with solder pads for soldering target objects.

6. A battery, characterized in that, Includes the battery cell and the protection board as described in any one of claims 1-5; The electronic component is electrically connected to the tabs of the battery cell; The temperature sensor is used to detect the temperature of the battery cell.

7. The battery according to claim 6, characterized in that, The number of battery cells is multiple; In the first direction, each of the battery cells and each of the second circuit boards are located on the same side of the first circuit board; In the second direction, the battery cells are arranged sequentially at intervals; In the second direction, the temperature sensor is provided between adjacent battery cells; The first direction, the second direction, and the thickness direction of the first circuit board intersect each other.

8. The battery according to claim 7, characterized in that, In the second direction, a temperature sensor on one of the second circuit boards is located between a group of adjacent battery cells.

9. The battery according to claim 6, characterized in that, The second circuit board is fixedly connected to the outer casing of the battery cell.

10. The battery according to claim 6, characterized in that, The temperature sensor is spaced apart from the battery cell; The battery also includes an insulating and thermally conductive adhesive that connects the battery cell and the temperature sensor.

11. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 6 to 10.

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