Battery and battery protection device

Abstract

The invention discloses a battery, which comprises an electrode and a battery protection device, wherein the electrode is connected to an external charging device through the battery protection device, and the battery protection device is used to disconnect the electrical connection between the electrode and the external charging device under preset conditions, thereby finally realizing overcharge protection of the battery.

Description

Technical Field

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

[0002] With the continuous development of electronic products, people pay more and more attention to the safety of electronic products. Among them, charging safety is one of the most important aspects of electronic products. Short circuit of charging line, communication interference, contactor sticking, etc. may cause battery overcharging. Once the battery is overcharged, it will cause the battery to self-discharge, shortening the battery life; in severe cases, it will cause the battery temperature to rise, causing combustion or even explosion. Therefore, battery overcharging greatly affects the safety of electronic products.

[0003] Therefore, a battery is needed to ensure safe and stable charging. Summary of the invention

[0004] The embodiments of the present invention provide a battery and a battery protection device, which can disconnect the electrical connection between the battery and an external charging device when the battery is detected to be overcharged, thereby realizing overcharge protection of the battery.

[0005] In order to solve the above technical problems, the first technical solution adopted in the embodiment of the present invention is: to provide a battery, which includes an electrode; a battery protection device, the electrode is connected to an external charging device through the battery protection device, and the battery protection device is used to disconnect the electrical connection between the electrode and the external charging device under preset conditions.

[0006] To solve the above technical problems, the second technical solution adopted in the embodiment of the present invention is: to provide a battery protection device, which is applied to a battery; wherein one end of the battery protection device is connected to the electrode of the battery, and the other end is connected to an external charging device, and the battery protection device is used to disconnect the electrical connection between the electrode and the external charging device under preset conditions.

[0007] The beneficial effect of the present invention is that, different from the prior art, the battery provided by the present invention includes: an electrode and a battery protection device, the electrode is electrically connected to an external charging device through the battery protection device, and the battery protection device disconnects the electrical connection between the battery and the external charging device under preset conditions, thereby realizing overcharge protection of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic structural diagram of a battery provided by an embodiment of the present invention;

[0009] Figure 2 yes Figure 1 A schematic diagram of the structure of the disconnection unit shown in ;

[0010] Figure 3 yes Figure 1 A structural schematic diagram of a fixing portion shown in ;

[0011] Figure 4 yes Figure 1 A schematic structural diagram of another fixing portion shown in ;

[0012] Figure 5 yes Figure 2 Schematic diagram of the outbreak scenario of the fixed part in . DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the embodiments of the present invention and are not used to limit the embodiments of the present invention.

[0014] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0015] It should also be noted that the directional terms such as left, right, up, down, top, and bottom in the following embodiments are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0016] Please also read Figures 1 to 5 In one embodiment of the present invention, a battery 10 includes an electrode and a battery protection device 70. The electrode is connected to an external charging device (not shown) through the battery protection device 70. The battery protection device 70 is used to disconnect the electrical connection between the electrode of the battery 10 and the external charging device under a preset condition. The preset condition is a condition set according to actual needs, such as a current value or a voltage value exceeding a preset threshold, or a variation range of the current value or the voltage value exceeding a preset threshold.

[0017] The battery provided by the present invention is provided with a battery protection device, so that the battery protection device disconnects the electrical connection between the battery and an external charging device under a preset condition, thereby realizing overcharge protection of the battery.

[0018] In one embodiment, the electrodes include a first electrode 60 and a second electrode 50, and the polarities of the first electrode 60 and the second electrode 50 are opposite. It can be understood that at least one of the first electrode 60 and the second electrode 50 of the battery 10 can be connected to an external charging device through a battery protection device 70 to complete the technical solution. For the convenience of description, the following description takes the example of the first electrode 60 of the battery 10 being connected to an external charging device through a battery protection device 70.

[0019] Specifically, the battery protection device 70 may further include: an interface portion 71, one end of which is connected to an external charging device; a fixed portion 72, one end of which is connected to the interface portion 71, and the other end of which is connected to the first battery electrode 60, whereby the battery 10 can establish an electrical connection with the external charging device through the fixed portion 72 and the interface portion 71, so that a complete charging circuit is formed between the battery 10 and the external charging device. The fixed portion 72 includes a disconnection unit 721, which is used to disconnect the electrical connection between the fixed portion 72 and the interface portion 71 under a preset condition, thereby disconnecting the electrical connection between the battery 10 and the external charging device. The preset condition is a condition set according to actual needs, such as a current value or a voltage value exceeding a preset threshold, or a range of change of the current value or the voltage value exceeding a preset threshold, which is not limited here. The following description is based on the current value or the voltage value exceeding a certain threshold as a preset condition.

[0020] Specifically, the disconnection unit 721 can also be used to detect the current value or voltage value of the battery 10. When the disconnection unit 721 detects that the current value or voltage value of the battery 10 exceeds a preset threshold, the disconnection unit 721 disconnects the electrical connection between the fixed portion 72 and the interface portion 71. There are many ways to disconnect the electrical connection between the fixed portion 72 and the interface portion 71, such as generating a force on the interface portion 71 so that the interface portion 71 is separated from the fixed portion 72. The force here can be a mechanical force or a force generated by a chemical reaction, which is not specifically limited here. For example, the disconnection unit 721 can be designed as a switch circuit. When it is detected that the current value or voltage value of the battery 10 exceeds a preset threshold, the disconnection unit 721 disconnects the electrical connection between the fixed portion 72 and the interface portion 71, so that a complete charging circuit cannot be formed between the battery 10 and the external charging device. The following description takes the example of the disconnection unit 721 generating a force on the interface portion 71 so that the interface portion 71 is separated from the fixed portion 72.

[0021] The number of the fixing part 72 in this embodiment can be one fixing part connected to the battery 10, or can include multiple fixing parts connected to the battery 10, which can be set accordingly according to the specific needs. Accordingly, the number of the disconnecting units 721 in the fixing part 72 can also be set according to the needs.

[0022] like Figure 2As shown, the disconnect unit 721 includes a control unit 7211 and a disconnect unit 7212 coupled to each other; the control unit 7211 detects whether the current value or voltage value of the battery 10 exceeds a preset threshold value. Specifically, the control unit 7211 is used to obtain the current value or voltage value of the battery 10, and determine whether the current value or voltage value of the battery 10 exceeds the preset threshold value. When it is detected that the current value or voltage value of the battery 10 exceeds the preset threshold value, the control unit 7211 controls the disconnect unit 7212 to generate a force so that the interface unit 71 is separated from the fixing unit 72, so as to disconnect the electrical connection between the fixing unit 72 and the interface unit 71.

[0023] Optionally, the control unit 7211 can be a control chip or a control circuit, or other mechanism with a control function. When it detects that the current value or voltage value of the battery 10 exceeds a preset threshold, it sends an instruction to the disconnection unit 7212 so that the disconnection unit 7212 performs a corresponding action, thereby generating a force.

[0024] In a specific implementation of the first embodiment of the present invention, when the control unit 7211 detects that the current value or the voltage value does not exceed the preset threshold value, the fixing unit 72 is in a connected state with the interface unit 71. Specifically, when the control unit 7211 detects that the current value or the voltage value of the battery 10 does not exceed the preset threshold value, no instruction is sent to the disconnection unit 7212, and the disconnection unit 7212 does not perform the corresponding action, thereby not generating a force, so that the fixing unit 72 and the interface unit 71 maintain a normal charging state.

[0025] In a specific embodiment of the present invention, Figure 3 As shown, the fixing part 72 also includes a connecting cavity 720, which is used to accommodate a disconnecting unit 721. The connecting cavity 720 is also connected to the interface part 71, and the disconnecting unit 7212 can be an explosive gas generator, such as a detonator or an air bag, which is used to increase the air pressure in the connecting cavity 720, and the air pressure applies pressure to the interface part 71 and causes the interface part 71 to separate from the fixing part 72, so as to disconnect the electrical connection between the fixing part and the interface part. Figure 5 As shown, when the current value or voltage value of the battery 10 exceeds a preset threshold value, it is used to increase the air pressure in the connecting cavity 720. The increased air pressure causes the interface portion 71 to separate from the fixing portion 72 through the connecting cavity 720, thereby disconnecting the connection between the fixing portion 72 and the interface portion 71, thereby disconnecting the electrical connection between the battery 10 and the charging device.

[0026] In the embodiment of the present invention, the control unit controls the disconnection unit to generate a force to separate the interface unit from the fixing unit, thereby disconnecting the electrical connection between the fixing unit and the interface unit, and further disconnecting the electrical connection between the battery and the external charging device.

[0027] like Figure 4As shown, in another specific embodiment of the fixing portion 72, the fixing portion 72 may further include a first fixing portion 725 and a second fixing portion 726, one end of the first fixing portion 725 is connected to the interface portion 71, and the other end of the first fixing portion 725 is connected to the second fixing portion 726. The first fixing portion 725 includes a connecting cavity 720, and the connecting cavity 720 is used to accommodate the disconnection unit 721. The other end of the second fixing portion 726 is connected to the first electrode 60.

[0028] Figure 4 The fixing part shown is the same as the above Figure 3 The fixing parts shown can be replaced in the battery embodiments, and the resulting solutions are all within the scope of protection of the present invention.

[0029] like Figure 1 As shown, optionally, the battery 10 may also include a shell 80 and a connection interface 51 connected to the shell 80; the second electrode 50 of the battery is connected to the connection interface 51 through the shell 80, and the connection interface 51 is connected to an external charging device so that the second electrode 50 of the battery is connected to the external charging device; the first electrode 60 of the battery 10 is connected to the external charging device through the battery protection device 70; so that a complete charging circuit is formed between the second electrode 50, the first electrode 60 of the battery 10 and the external charging device.

[0030] Furthermore, in other embodiments, the end of the fixing portion 72 of the battery protection device 70 is clamped to the housing 80 through the insulating layer 90 and the gasket 100 , wherein the insulating layer 90 can also be used to prevent the fixing portion 72 from being electrically connected to the housing 80 .

[0031] The battery provided by the embodiment of the present invention generates a force to disconnect the electrical connection between the battery and the charging device when the battery protection device detects that the charging current value or voltage value exceeds a preset threshold value, thereby realizing overcharge protection of the battery.

[0032] A battery protection device 70 according to an embodiment of the present invention is applied to a battery 10; wherein one end of the battery protection device 70 is connected to an electrode of the battery 10, and the other end is connected to an external charging device. The battery protection device 70 in this embodiment includes the technical features described in any of the above embodiments of the battery protection device, and the technical effects it possesses also include the technical effects described in the above embodiments of the battery protection device, which will not be described in detail herein.

[0033] An embodiment of the present invention provides a battery protection device. When a disconnect unit in the device detects that the current value or voltage value of the battery exceeds a preset threshold value, a force is generated to separate the interface part from the fixed part, thereby disconnecting the electrical connection between the fixed part and the interface part, and further disconnecting the electrical connection between the battery and an external charging device, thereby finally achieving overcharge protection of the battery.

[0034] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery, characterized in that: include: electrode; A battery protection device, through which the electrode is connected to an external charging device, and the battery protection device is used to disconnect the electrical connection between the electrode and the external charging device under preset conditions; Wherein, the battery protection device comprises: An interface portion, one end of which is connected to the external charging device; a fixing part, one end of which is connected to the interface part, and the other end of which is connected to the electrode; the fixing part comprises a disconnection unit, and the disconnection unit is used to disconnect the electrical connection between the fixing part and the interface part under a preset condition, thereby disconnecting the electrical connection between the battery and the external charging device; The fixing part further comprises a connecting cavity, and the connecting cavity is used to accommodate the disconnecting unit; the connecting cavity is connected to the interface part, and the disconnecting unit comprises a control part and a disconnecting part coupled to each other, and the disconnecting part is an explosive gas generator, which is used to increase the gas pressure in the connecting cavity, and the gas pressure applies pressure to the interface part and causes the interface part to be separated from the fixing part, so as to disconnect the electrical connection between the fixing part and the interface part; The battery further comprises a shell, and the end of the fixing portion is clamped to the shell via an insulating layer and a gasket; wherein the insulating layer is also used to prevent the fixing portion from being electrically connected to the shell.

2. The battery according to claim 1, characterized in that The preset condition is that the current value or the voltage value exceeds a preset threshold, or the variation range of the current value or the voltage value exceeds a preset threshold.

3. The battery according to claim 1, characterized in that The electrodes include a first electrode and a second electrode, and the first electrode and the second electrode are opposite in polarity.

4. The battery according to claim 1, characterized in that The control unit detects whether the current value or voltage value of the battery exceeds a preset threshold value. When the current value or voltage value exceeds the preset threshold value, the control unit controls the disconnection unit to generate a force so that the interface unit is separated from the fixing unit to disconnect the electrical connection between the fixing unit and the interface unit.

5. The battery according to claim 1, characterized in that The battery is also connected to the housing via a connection interface; The second electrode of the battery is connected to the connection interface through the shell, and the connection interface is connected to an external charging device, so that the second electrode of the battery is connected to the external charging device.

6. A battery protection device, characterized in that: The battery protection device is applied to the battery as described in any one of claims 1-5; wherein, one end of the battery protection device is connected to the electrode of the battery, and the other end is connected to an external charging device, and the battery protection device is used to disconnect the electrical connection between the electrode and the external charging device under preset conditions.

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