Battery with protection function

Abstract

The embodiment of the utility model discloses a battery with a protection function, which comprises a battery body and a protection plate, the protection plate is provided with a protection circuit, the protection circuit comprises a battery positive pole point, a battery negative pole point, an external positive pole point and an external negative pole point, the battery positive pole point is connected to the positive pole of the battery body through a wire, and the external negative pole point is connected to the negative pole of the battery body through a wire. The external positive pole line is connected to the positive pole of the battery body, the battery negative pole line is connected to the negative pole of the battery body, the protection circuit is used for detecting and controlling the battery body to be in a normal working state, and the external positive pole and the external negative pole are used for being connected with a load and supplying power to the load or being connected with a power supply and charging the battery body. According to the battery with the protection function, the state of the battery is monitored and controlled in real time through the integrated protection board and the protection circuit on the integrated protection board, so that the battery is always in a normal working state, and the safety and the reliability of the battery are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery with a protective function. Background Art

[0002] Lithium thionyl chloride battery (hereinafter referred to as Li-thion battery) is a disposable lithium metal battery with lithium as negative electrode, carbon as positive electrode, and anhydrous lithium tetrachloroaluminate thionyl chloride (SOCl2) solution as electrolyte. The energy density of Li-thion battery is much higher than other types of batteries, which means that Li-thion battery can provide more power in the same volume and weight. This makes Li-thion battery an ideal power source for portable electronic devices.

[0003] However, precisely because of its high energy density, lithium-ion batteries are prone to thermal runaway under extreme conditions such as overcharging, over-discharging, and short circuiting, leading to safety accidents such as explosions and fires. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a battery with a protective function to solve the disadvantages of the existing lithium-ion battery that it is prone to thermal runaway under extreme conditions such as overcharging, overdischarging, and short circuit, leading to safety accidents such as explosion and fire.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An embodiment of the utility model provides a battery with a protection function, which includes: a battery body and a protection board, wherein a protection circuit is arranged on the protection board, wherein the protection circuit includes a battery positive pole, a battery negative pole, an external positive pole and an external negative pole, wherein the battery positive pole line is connected to the positive pole of the battery body, and the battery negative pole line is connected to the negative pole of the battery body, wherein the protection circuit is used to detect and control the battery body to be in a normal working state, and the external positive pole and the external negative pole are used to connect a load and supply power to it, or to connect a power source and charge the battery body.

[0007] As a preferred technical solution of the present invention, the protection plate is installed on the side wall of the battery body in the length direction.

[0008] As a preferred technical solution of the present invention, the length direction of the protection plate is the same as the length direction of the battery body.

[0009] As a preferred technical solution of the present utility model, the length of the protection plate is less than or equal to the length of the battery body.

[0010] As a preferred technical solution of the utility model, it also includes a protective film, and the protective plate and the battery body are both wrapped in the protective film, so that the protective plate and the battery body are relatively fixed.

[0011] As a preferred technical solution of the present utility model, the protection circuit includes an overcharge protection circuit.

[0012] As a preferred technical solution of the present utility model, the protection circuit includes an over-discharge protection circuit.

[0013] As a preferred technical solution of the present utility model, the protection circuit includes an overcurrent protection circuit.

[0014] As a preferred technical solution of the present utility model, the protection circuit includes a short-circuit protection circuit.

[0015] As a preferred technical solution of the present utility model, the protection circuit includes a temperature control protection circuit.

[0016] Compared with the prior art, the battery with protection function of the utility model realizes real-time monitoring and control of the battery status by integrating the protection board and the protection circuit thereon, thereby ensuring that the battery is always in a normal working state and improving the safety and reliability of the battery.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of a battery with a protective function according to the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the local A in the middle;

[0021] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B in the middle.

[0022] Description of the symbols in the figure:

[0023] 1. Battery body; 2. Protection board; 21. Battery positive pole; 22. Battery negative pole; 23. External positive pole; 24. External negative pole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0026] 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0031] See also Figures 1 to 3 , the embodiment of the utility model provides a battery with a protection function, which includes: a battery body 1 and a protection board 2, the protection board 2 is provided with a protection circuit, the protection circuit includes a battery positive pole 21, a battery negative pole 22, an external positive pole 23 and an external negative pole 24, the battery positive pole 21 is connected to the positive pole of the battery body 1, the battery negative pole 22 is connected to the negative pole of the battery body 1, the protection circuit is used to detect and control the battery body 1 to be in a normal working state, the external positive pole 23 and the external negative pole 24 are used to connect to the load and supply power to it, or connect to the power supply and charge the battery body 1. It should be explained that the protection board 2 is a circuit board, and the protection circuit is arranged on it. At the same time, the protection board 2 is also provided with a charging circuit and a discharging circuit, and the charging circuit and the discharging circuit are both connected to the protection circuit, which means that the battery body 1 is monitored and controlled by the protection circuit during the charging or discharging process, so as to make the charging / discharging process safer and more stable.

[0032] This embodiment realizes real-time monitoring and control of the battery status by integrating the protection board 2 and the protection circuit thereon, thereby ensuring that the battery is always in normal working condition. This integrated design simplifies the use and maintenance process of the battery, improves the safety and reliability of the battery, and effectively solves the problems of voltage fluctuation and current instability that may occur during the use of the battery, thereby improving the stability of the battery. At the same time, the integrated protection circuit design makes the battery management simpler and more convenient. Users do not need to purchase or use a complex battery management system, which reduces the cost of use and the difficulty of maintenance.

[0033] Specifically, the battery body 1 is a lithium sub-power type ER14505M battery, and the diameter of this type of battery is 14.5 mm.

[0034] Furthermore, in order to prevent the protective plate 2 from affecting the normal use of the battery body 1, the protective plate 2 is installed on the side wall of the battery body 1 in the length direction in this embodiment. Specifically, the length direction of the protective plate 2 is the same as the length direction of the battery body 1. Specifically, the length of the protective plate 2 is less than or equal to the length of the battery body 1. Furthermore, the width of the protective plate 2 is less than the diameter of the battery body 1. Preferably, the battery positive pole 21 is arranged close to the positive pole of the battery body 1, and the battery negative pole 22 is arranged close to the negative pole of the battery body 1.

[0035] It can be understood that the battery body 1 is a cylinder, and the two ends of the cylinder are the positive and negative electrodes of the battery respectively, and the length direction of the battery body 1 is the side wall of the cylinder, and the protective plate 2 is installed on the side wall of the battery body 1 with a cylindrical appearance. Further, the protective plate 2 is a rectangular circuit board with a long side and a wide side, and the long side of the protective plate 2 is set in the same direction as the axial direction of the battery body 1. Further, the length of the protective plate 2 is less than or equal to the length of the battery body 1, which means that the upper side of the protective plate 2 does not exceed the upper end of the battery body 1, and the lower side of the protective plate 2 does not exceed the lower end of the battery body 1; the width of the protective plate 2 is less than the diameter of the battery body 1, which means that when the protective plate 2 is attached to the side wall of the battery body 1, the left side and right side of the protective plate 2 projected in the direction of the battery body 1 do not exceed the side wall edge of the battery body 1, so as to protect the operation of the battery body 1 while minimizing the impact on the installation and normal use of the battery body 1.

[0036] Furthermore, a protective film is included, and the protective plate 2 and the battery body 1 are both wrapped in the protective film, so that the protective plate 2 and the battery body 1 are relatively fixed.

[0037] In this embodiment, a protective film is used to wrap the protective plate 2 and the battery body 1. While fixing the protective plate 2 and the battery body 1, the circuit on the surface of the protective plate 2 is not disturbed by the external environment. Optionally, the protective film is a PVC film. Furthermore, the protective plate 2 and the battery body 1 are heat-shrinkably wrapped together with a PVC film. The PVC film has excellent adhesion and can be firmly adhered to the surface of the protective plate 2 and the battery body 1, which means that during the wrapping process, the PVC film can fit tightly and is not easy to fall off, thereby effectively fixing the protective plate 2 and the battery body 1. At the same time, at the end of the process, the PVC film can be easily removed without leaving any glue residue or corroding the battery body 1 or the protective plate 2. More importantly, as a heat-shrinkable material, the PVC film can shrink and wrap tightly around the protective plate 2 and the battery body 1 when heated.

[0038] In one embodiment, the protection circuit includes an overcharge protection circuit, which is used to monitor the charging state of the battery body 1. Once the voltage of the battery body 1 reaches or exceeds a preset overcharge threshold, the circuit will quickly cut off the charging circuit to prevent the battery body 1 from being damaged or causing a safety accident due to overcharging. It should be explained that the overcharge protection circuit belongs to the prior art and will not be described in detail here.

[0039] In one embodiment, the protection circuit includes an over-discharge protection circuit, which is responsible for monitoring the discharge state of the battery body 1. When the voltage of the battery body 1 drops to a preset over-discharge threshold, the circuit disconnects the discharge circuit to prevent the battery body 1 from being over-discharged and causing performance degradation or damage. It should be explained that the over-discharge protection circuit belongs to the prior art and will not be described in detail here.

[0040] In one embodiment, the protection circuit includes an overcurrent protection circuit. The function of the overcurrent protection circuit is to detect the current size of the battery body 1 during the charging / discharging process. Once the current exceeds the safe range, the circuit will immediately cut off the charging circuit / discharging circuit to prevent damage to the battery body 1 or the load device due to excessive current. It should be explained that the overcurrent protection circuit belongs to the prior art and will not be described in detail here.

[0041] In one embodiment, the protection circuit includes a short-circuit protection circuit, which is used to monitor whether a short circuit occurs between the positive and negative electrodes of the battery body 1. Once a short circuit is detected, the circuit will quickly cut off the connection between the battery body 1 and the load or charger to prevent the short-circuit current from damaging the battery body 1 or causing safety accidents such as fire. It should be explained that the short-circuit protection circuit belongs to the prior art and will not be described in detail here.

[0042] In one embodiment, the protection circuit includes a temperature control protection circuit, which is used to monitor the temperature change of the battery body 1. When the temperature of the battery body 1 exceeds the normal working range, the circuit will take corresponding measures, such as reducing the charge and discharge current or disconnecting the circuit, to ensure that the battery body 1 will not be damaged in an overheated or overcooled environment. It should be explained that the temperature control protection circuit belongs to the prior art and will not be described in detail here.

[0043] In one embodiment, the protection circuit includes at least one of an overcharge protection circuit, an over-discharge protection circuit, an overcurrent protection circuit, a short circuit protection circuit, and a temperature control protection circuit.

[0044] Compared with the prior art, the battery with protection function of the utility model realizes real-time monitoring and control of the battery status by integrating the protection board and the protection circuit thereon, thereby ensuring that the battery is always in a normal working state and improving the safety and reliability of the battery.

[0045] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A battery with a protective function, characterized in that: include: A battery body and a protection board, wherein a protection circuit is arranged on the protection board, wherein the protection circuit comprises a battery positive pole, a battery negative pole, an external positive pole and an external negative pole, wherein the battery positive pole line is connected to the positive pole of the battery body, and the battery negative pole line is connected to the negative pole of the battery body, wherein the protection circuit is used to detect and control the battery body to be in a normal working state, and the external positive pole and the external negative pole are used to connect a load and supply power to it, or to connect a power source and charge the battery body.

2. A battery with a protective function according to claim 1, characterized in that: The protection plate is installed on the side wall of the battery body in the length direction.

3. A battery with a protective function according to claim 2, characterized in that: The length direction of the protection plate is the same as the length direction of the battery body.

4. A battery with a protective function according to claim 3, characterized in that: The length of the protection plate is less than or equal to the length of the battery body.

5. A battery with a protective function according to claim 1, characterized in that: It also includes a protective film, in which the protective plate and the battery body are both wrapped, so that the protective plate and the battery body are relatively fixed.

6. A battery with a protective function according to claim 1, characterized in that: The protection circuit includes an overcharge protection circuit.

7. A battery with a protective function according to claim 1, characterized in that: The protection circuit includes an over-discharge protection circuit.

8. A battery with a protective function according to claim 1, characterized in that: The protection circuit includes an overcurrent protection circuit.

9. A battery with a protective function according to claim 1, characterized in that: The protection circuit includes a short circuit protection circuit.

10. A battery with a protective function according to claim 1, characterized in that: The protection circuit includes a temperature control protection circuit.

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