Battery protection device and battery assembly

Abstract

The present application discloses a battery protection device and a battery assembly, wherein the battery protection device comprises a circuit board and a temperature detection device, wherein: the circuit board is provided with a groove; the temperature detection device is arranged in the groove, and the temperature detection device is used to detect the temperature of the battery cell.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery protection device and a battery assembly. Background Art

[0002] In order to improve the performance of the battery, it is usually necessary to provide a temperature detection device for detecting the temperature of the battery cell, and control the charging and discharging of the battery according to the battery cell temperature detected by the temperature detection device.

[0003] In the related art, a temperature detection device is disposed on the surface of a circuit board. When the temperature of other electronic components on the circuit board is higher than the temperature of the battery cell, there is a difference between the temperature detected by the temperature detection device and the actual temperature of the battery cell, resulting in a problem of low accuracy of the detected battery cell temperature. Utility Model Content

[0004] The present application discloses a battery protection device and a battery assembly, which can improve the accuracy of the detected battery cell temperature.

[0005] In a first aspect, an embodiment of the present application discloses a battery protection device, comprising a circuit board and a temperature detection device, wherein: the circuit board is provided with a groove; the temperature detection device is arranged in the groove, and the temperature detection device is used to detect the temperature of the battery cell.

[0006] In a second aspect, an embodiment of the present application discloses a battery assembly, comprising the battery protection device described in the first aspect.

[0007] An embodiment of the present application provides a battery protection device, which includes a circuit board and a temperature detection device. The circuit board is provided with a groove, and the temperature detection device for detecting the temperature of a battery cell is arranged in the groove, so that the temperature detection device can be kept away from the electronic components on the surface of the circuit board, thereby reducing the influence of the heating of the electronic components on the surface of the circuit board on the detection of the battery cell temperature by the temperature detection device, thereby improving the accuracy of the battery cell temperature detected by the temperature detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A top view of a battery protection device disclosed in an embodiment of the present application;

[0009] Figure 2 A schematic diagram of the structure of a battery protection device disclosed in an embodiment of the present application;

[0010] Figure 3 A schematic diagram of the structure of a battery assembly disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0012] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0013] The present application discloses a battery protection device and a battery assembly. Figure 1 is a top view of a battery protection device disclosed in an embodiment of the present application, Figure 2 A schematic diagram of the structure of a battery protection device disclosed in an embodiment of the present application.

[0014] like Figure 1 and Figure 2 As shown, the battery protection device disclosed in the present application includes a circuit board 110 and a temperature detection device 120, wherein: the circuit board 110 is provided with a groove 111; the temperature detection device 120 is arranged in the groove 111, and the temperature detection device 120 is used to detect the temperature of the battery cell.

[0015] In the present application, a plurality of electronic components are arranged on the circuit board 110. By opening a groove 111 on the circuit board 110 and setting a temperature detection device 120 for detecting the temperature of the battery cell in the groove 111, the temperature detection device 120 can be kept away from the electronic components on the surface of the circuit board 110, thereby reducing the influence of the heating of the electronic components on the surface of the circuit board 110 on the detection of the battery cell temperature by the temperature detection device 120, improving the accuracy of the battery cell temperature detected by the temperature detection device 120, and further better controlling the charging and discharging of the battery according to the detected battery cell temperature, thereby improving the battery performance.

[0016] It should be noted that the temperature detection device 120 can be connected to the controller. The temperature detection device 120 is used to detect the temperature of the battery cell and send the detected battery cell temperature data to the controller. The controller controls the charging and discharging of the battery according to the received battery cell temperature data.

[0017] An embodiment of the present application provides a battery protection device, which includes a circuit board 110 and a temperature detection device 120. The circuit board 110 is provided with a groove 111. The temperature detection device 120 for detecting the temperature of a battery cell is arranged in the groove 111, which can make the temperature detection device 120 away from the electronic components on the surface of the circuit board 110, thereby reducing the influence of the heating of the electronic components on the surface of the circuit board 110 on the detection of the battery cell temperature by the temperature detection device 120, and improving the accuracy of the battery cell temperature detected by the temperature detection device 120.

[0018] In one implementation, the groove 111 may be away from the electronic components on the circuit board 110. The groove 111 opened on the circuit board 110 is away from the electronic components on the surface of the circuit board 110, which can further keep the temperature detection device 120 away from the electronic components on the surface of the circuit board 110, thereby further improving the accuracy of the battery core temperature detected by the temperature detection device 120. For example, Figure 2 As shown, the groove 111 can be arranged at an edge of the circuit board 110 .

[0019] In the embodiment of the present application, the battery protection device may further include a heat insulating member 130, and the heat insulating member 130 is disposed between the groove 111 and the temperature detection device 120. By disposing the heat insulating member 130 between the groove 111 and the temperature detection device 120, it is possible to prevent the temperature of the circuit board 110 from being transferred to the temperature detection device 120, thereby affecting the accuracy of the battery cell temperature detected by the temperature detection device 120.

[0020] In one implementation, the heat insulating member 130 may include an insulating film. The insulating film has insulating and heat dissipating properties. Since the insulating film is thin, by arranging the insulating film as the heat insulating member 130 between the groove 111 and the temperature detection device 120, the space occupied by the heat insulating member 130 in the groove 111 can be reduced.

[0021] In the present application, the insulating film may cover the surface of the groove 111. That is, the groove wall and the groove bottom of the groove 111 are covered with an insulating film to prevent the temperature of the circuit board 110 from being transferred to the temperature detection device 120, thereby affecting the accuracy of the battery core temperature detected by the temperature detection device 120.

[0022] In addition, there is no large copper sheet covering the bottom of the temperature detection device 120 to prevent the temperature of the circuit board 110 from being transferred to the temperature detection device 120 , thereby affecting the accuracy of the battery core temperature detected by the temperature detection device 120 .

[0023] It should be noted that the above-mentioned use of the insulating film as the thermal insulation member 130 is only an example, and the thermal insulation member 130 can also be other structures that can prevent the temperature of the circuit board 110 from being transferred to the temperature detection device 120, and the present application does not impose specific restrictions on this.

[0024] In one implementation, the temperature detection device 120 may include a thermistor. A thermistor is a nonlinear resistor that is sensitive to temperature and whose resistance changes with temperature, and is usually made of single crystal or polycrystalline semiconductor materials. In this embodiment, the thermistor may be connected to a resistance detection device, which is connected to a controller. The resistance detection device sends the resistance value of the thermistor detected to the controller, and the controller controls the charging and discharging of the battery according to the received resistance value of the thermistor.

[0025] In the embodiment of the present application, the height of the temperature detection device 120 may be less than the depth of the groove 111. By setting the groove depth of the groove 111 to be greater than the height of the temperature detection device 120, the temperature detection device 120 can be further kept away from the electronic components on the surface of the circuit board 110, thereby further improving the accuracy of the battery core temperature detected by the temperature detection device 120.

[0026] In one implementation, the battery protection device may further include a fastener 140, and the fastener 140 is used to fix the temperature detection device 120 in the groove 111. By fixing the temperature detection device 120 in the groove 111 with the fastener 140, the stability of the temperature detection device 120 can be ensured.

[0027] In one implementation, a step portion is provided at the edge of the circuit board 110, and the groove 111 is opened at the bottom of the step portion. By first providing a step portion at the edge of the circuit board 110, which is essentially equivalent to a groove, and then opening a groove 111 for placing the temperature detection device 120 at the bottom of the step portion, the temperature detection device 120 can be further kept away from the electronic components on the surface of the circuit board 110, thereby reducing the effect of the heating of the electronic components on the surface of the circuit board 110 on the temperature detection device 120 detecting the battery cell temperature, improving the accuracy of the battery cell temperature detected by the temperature detection device 120, and then better controlling the battery charging and discharging according to the detected battery cell temperature, thereby improving the battery performance.

[0028] In this embodiment, the surface of the stepped portion may be covered with an insulating film to prevent the temperature of the circuit board 110 from being transferred to the temperature detection device 120 , thereby affecting the accuracy of the battery cell temperature detected by the temperature detection device 120 .

[0029] It should be noted that the depth direction of the groove 111 and the thickness direction of the step portion in the present application are consistent with the thickness direction of the circuit board 110 .

[0030] like Figure 3 As shown, the embodiment of the present application also discloses a battery assembly, including the battery protection device described above. In addition, the battery assembly also includes a battery 200 , and the battery 200 is connected to the battery protection device 100 .

[0031] The above embodiments of the present application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0032] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A battery protection device, characterized in that: It includes a circuit board and a temperature detection device, wherein: The circuit board is provided with a groove; The temperature detection device is arranged in the groove, and is used to detect the temperature of the battery core.

2. The battery protection device according to claim 1, characterized in that: The groove is away from the electronic components on the circuit board.

3. The battery protection device according to claim 2, characterized in that: The groove is arranged at an edge of the circuit board.

4. The battery protection device according to any one of claims 1 to 3, characterized in that: It also includes a heat insulating member, which is arranged between the groove and the temperature detection device.

5. The battery protection device according to claim 4, characterized in that: The thermal insulation member includes an insulating film.

6. The battery protection device according to claim 5, characterized in that: The insulating film covers a surface of the groove.

7. The battery protection device according to claim 1, characterized in that: The temperature detection device includes a thermistor.

8. The battery protection device according to claim 1, characterized in that: The height of the temperature detection device is smaller than the depth of the groove.

9. The battery protection device according to any one of claims 1 to 3 and 5 to 8, characterized in that: A stepped portion is provided at the edge of the circuit board, and the groove is opened at the bottom of the stepped portion.

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

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