CN113113951A

CN113113951A - Battery protection device and battery device

Info

Publication number: CN113113951A
Application number: CN202110418159.5A
Authority: CN
Inventors: 周号; 段伟
Original assignee: Zhuhai Maiju Microelectronics Co Ltd
Current assignee: Zhuhai Maiju Microelectronics Co Ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-07-13

Abstract

The present disclosure provides a battery protection device, including: a battery protector, the battery protector comprising: the first switching part is connected between the positive electrode of the battery cell of the battery device and the positive electrode of the battery device; the first voltage acquisition part acquires the voltage of the positive electrode of the battery cell; and the first logic processor is respectively connected with the first voltage acquisition part and the first switch part, when the positive voltage of the battery cell acquired by the first voltage acquisition part is out of a first threshold voltage range, the first logic processor outputs a first control signal, and the first switch part is turned off based on the first control signal. The present disclosure also provides a battery device.

Description

Battery protection device and battery device

Technical Field

The present disclosure belongs to the technical field of battery protection, and particularly relates to a battery protection device and a battery device.

Background

In the prior art, the protection schemes of a single battery of a mobile phone are divided into three types, and a high-end mobile phone needs to be charged by a large current in quick charging, so that double protection chips are required to be cascaded, and an external shunt resistor is required to be used for protection.

The single battery of apple and samsung, because the charging power does not exceed 25W, so the single protection chip is adopted, and the MOSFET scheme is integrated. The Gauge chip is placed in the battery pack, and the electric quantity measurement with higher precision is provided.

The scheme that the bottom mobile phone is arranged in the battery pack can adopt a single battery for protection, and the electricity meter chip is arranged on the system side.

At present, the different single battery protection schemes have the disadvantages that, no matter the scheme is at the system side or in the battery pack, the electricity meter is only responsible for metering and is not responsible for protection for cost, the chip cost of single integrated protection is high, and only the protection of the positive end is provided.

And with the charging power of the battery getting bigger and bigger, the loop impedance needs to be reduced as much as possible in the loop, a sampling resistor of 5 to 10 milliohms cannot be adopted, in the scheme of separating the protection chip from the Gauge chip, more than two shunt resistors are required to be connected in series, the loop impedance is increased, and if the loop impedance can be reduced through integration, better protection can be provided for the heating on the system.

With the development of super fast charging of mobile phones, the application of 2s batteries to mobile phones charged with more than 60W is gradually increased. The 2s scheme is the same as the structure of a battery pack in a notebook computer, and in the existing architecture, because Fuse is large in size and impedance is large, heat generation is serious, so that in an actual mobile phone, a signal of secondary protection is output to the front end of a Type C port to perform overcurrent protection.

The existing single battery protection is used in low-side protection on a large scale. However, the driving voltage of the mobile phone current protection MOSFET is changed along with the voltage of the battery, so the RDSon of the MOSFET is changed greatly. Along with the charging power of a single-battery mobile phone is larger and larger, the electricity meter moves from the system side to the battery pack side to better monitor the real voltage and temperature of the battery, and the electricity management and charging current power management of the lithium battery have great advantages. However, most of the prior art battery pack side electricity meters have no MOSFET hardware protection and are not designed with enough safety. The recovery condition after protection is fixed, and the battery state cannot be read after protection.

Disclosure of Invention

In order to solve at least one of the above technical problems, the present disclosure provides a battery protection device and a battery device.

The battery protection device and the battery device are realized through the following technical scheme.

According to an aspect of the present disclosure, there is provided a battery protection device including: a battery protector, said battery protector comprising:

a first switching part connected between a positive electrode of a battery cell of the battery device and a positive electrode of the battery device;

the first voltage acquisition part acquires the voltage of the positive electrode of the battery cell; and the number of the first and second groups,

the first logic processor is respectively connected with the first voltage acquisition part and the first switch part, when the positive voltage of the battery cell acquired by the first voltage acquisition part is out of a first threshold voltage range, the first logic processor outputs a first control signal, and the first switch part is turned off based on the first control signal.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a first control portion connected between the first switching portion and the first logic processor.

According to the battery protection device of at least one embodiment of the present disclosure, when the positive voltage of the battery cell collected by the first voltage collection unit is outside a first threshold voltage range, the first logic processor generates a first control signal, and the first control unit turns off the first switching unit based on the first control signal.

According to the battery protection device of at least one embodiment of the present disclosure, the first voltage collecting part includes a first comparator, and when the positive voltage of the battery cell collected by the first voltage collecting part is out of a first threshold voltage range, the first voltage collecting part outputs a first comparison signal to the first logic processor, and the first logic processor generates the first control signal based on the first comparison signal.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a second voltage collection unit, the second voltage collection unit collects a positive voltage of the battery device, when the positive voltage of the battery device collected by the second voltage collection unit is outside a second threshold voltage range, the first logic processor outputs a second control signal, and the first switching unit is turned off based on the second control signal.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector determines whether a load or a charging device is connected to the battery device based on the positive voltage of the battery device collected by the second voltage collecting unit.

According to the battery protection device of at least one embodiment of the present disclosure, the second voltage collecting part includes a comparator and a current source.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector obtains a voltage difference between the voltage collected by the first voltage collecting part and the voltage collected by the second voltage collecting part, and when the voltage difference is outside a threshold voltage difference range, the battery protector generates a control signal to turn off the first switching part.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a first current collection unit, the first current collection unit is configured to collect a driving current of the first control unit, and when the driving current is outside a driving current threshold range, the first logic processor stops outputting a control signal to the first control unit.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a first current collection unit, the first current collection unit is configured to collect the driving current of the first control unit, and when the driving current is out of the driving current threshold range, the battery protector generates recording information and/or generates an alarm signal.

According to the battery protection device of at least one embodiment of the present disclosure, the first current collecting part includes a third comparator.

According to the battery protection device of at least one embodiment of this disclosure, the battery protector still includes second electric current collection portion, the second electric current collection portion gathers the electric current in the circuit between first switch portion and the positive pole of battery device, when the electric current that the second electric current collection portion gathered is outside second threshold current range, first logic processor exports fourth control signal, first switch portion is based on fourth control signal is turned off.

According to the battery protection device of at least one embodiment of this disclosure, the battery protector still includes first temperature acquisition portion, first temperature acquisition portion gathers the temperature of first switch portion, or gathers the temperature in the region that is close to first switch portion, when the temperature that first temperature acquisition portion gathered is greater than or equal to the threshold temperature, first logic processor exports fifth control signal, first switch portion is based on fifth control signal is turned off.

According to the battery protection device of at least one embodiment of the present disclosure, the first switching part is a field effect transistor.

According to the battery protection apparatus of at least one embodiment of the present disclosure, the first switching part is a single MOSFET or a combination of a plurality of MOSFETs.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a filter circuit, and the first voltage collection unit collects the positive voltage of the battery cell filtered by the filter circuit.

According to the battery protection device of at least one embodiment of the present disclosure, the battery cell includes one or more than two battery units.

The battery protection apparatus according to at least one embodiment of the present disclosure further includes:

a second switching device connected between the battery protector and an anode of the battery device, the second switching device including a second switching part;

a first voltage detection unit that detects a voltage between the battery protector and the second switching device; and the number of the first and second groups,

a second logic processor generating a control signal to control the second switching device to turn off when the voltage detected by the first voltage detecting part is outside a voltage threshold range.

The battery protection apparatus according to at least one embodiment of the present disclosure further includes a second control part connected between the second switching part and the second logic processor.

According to the battery protection device of at least one embodiment of the present disclosure, when the voltage detected by the first voltage detection section is outside a voltage threshold range, the second logic processor generates a control signal, and the second control section turns off the second switching section based on the control signal.

The battery protection device according to at least one embodiment of the present disclosure further includes a second voltage detection unit that detects a positive voltage of the battery device, and the second logic processor outputs a control signal to turn off the second switching unit when the positive voltage of the battery device collected by the second voltage detection unit is greater than a threshold voltage.

According to the battery protection device of at least one embodiment of the present disclosure, the second logic processor obtains a voltage difference between the voltage detected by the first voltage detection section and the voltage detected by the second voltage detection section, and generates a control signal to turn off the second switching section when the voltage difference is outside a threshold voltage difference range.

The battery protection apparatus according to at least one embodiment of the present disclosure further includes a current detection part that detects a current in a circuit between the second switching part and a positive electrode of the battery apparatus, and the second logic processor outputs a control signal to turn off the second switching part when the current detected by the current detection part is greater than a threshold current.

According to the battery protection device of at least one embodiment of this disclosure, the second switching device further includes a second temperature acquisition unit, the second temperature acquisition unit acquires the temperature of the second switching unit, or acquires the temperature of an area adjacent to the second switching unit, and when the temperature acquired by the second temperature acquisition unit is greater than or equal to a threshold temperature, the second logic processor outputs a control signal to turn off the second switching unit.

According to the battery protection device of at least one embodiment of the present disclosure, the second switching part is a field effect transistor.

According to the battery protection apparatus of at least one embodiment of the present disclosure, the second switching part is a single MOSFET or a combination of a plurality of MOSFETs.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a buffer, the buffer transmits the positive voltage of the battery cell to the second logic processor at a voltage value of a set proportion, and the second logic processor can generate a control signal to control the second switch portion based on the voltage value transmitted by the buffer.

According to the battery protection device of at least one embodiment of the present disclosure, the first logic processor and the second logic processor are connected via a control signal line so that the control signal generated by the second logic processor can be transmitted to the first logic processor and/or so that the control signal generated by the first logic processor can be transmitted to the second logic processor.

According to another aspect of the present disclosure, there is provided a battery protection device including:

at least two second switching devices connected in series between the positive electrode of the battery cell of the battery device and the positive electrode of the battery device, the second switching devices including a second switching part; and the number of the first and second groups,

a battery protector, said battery protector comprising:

the first voltage acquisition part acquires the voltage of the positive electrode of the battery cell;

the first logic processor is respectively connected with the first voltage acquisition part and a second switch part of a second switch device close to the battery cell, when the positive voltage of the battery cell acquired by the first voltage acquisition part is out of a first threshold voltage range, the first logic processor outputs a first control signal, and the second switch part is turned off based on the first control signal.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a first control portion connected between a second switching portion of a second switching device adjacent to the battery cell and the first logic processor.

According to the battery protection device of at least one embodiment of the present disclosure, when the positive voltage of the battery cell collected by the first voltage collection unit is outside a first threshold voltage range, the first logic processor generates a first control signal, and the first control unit turns off a second switching unit of a second switching device adjacent to the battery cell based on the first control signal.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a second voltage collecting portion, the second voltage collecting portion collects a positive voltage of the battery device, when the positive voltage of the battery device collected by the second voltage collecting portion is outside a second threshold voltage range, the first logic processor outputs a second control signal, and a second switching portion of a second switching device adjacent to the electric core is turned off based on the second control signal.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a first current collection unit, where the first current collection unit is configured to collect a driving current of a second switching unit of a second switching device close to the battery cell, and when the driving current is outside a driving current threshold range, the first logic processor stops outputting a control signal to the second switching unit of the second switching device close to the battery cell.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a second current collection unit, the second current collection unit collects a current in a circuit between a second switching unit of a second switching device adjacent to the electric core and a positive electrode of the battery device, when the current collected by the second current collection unit is outside a second threshold current range, the first logic processor outputs a fourth control signal, and the second switching unit of the second switching device adjacent to the electric core is turned off based on the fourth control signal.

According to the battery protection device of at least one embodiment of the present disclosure, the second switching device further includes a second temperature acquisition unit, the second temperature acquisition unit acquires a temperature of a second switching unit of the second switching device adjacent to the electric core, or acquires a temperature of an area where the second switching unit of the second switching device adjacent to the electric core is located, when the temperature acquired by the second temperature acquisition unit is greater than or equal to a threshold temperature, the first logic processor outputs a fifth control signal, and the second switching unit of the second switching device adjacent to the electric core is turned off based on the fifth control signal.

a first voltage detection section that detects a voltage between the two second switching devices; and the number of the first and second groups,

a second logic processor generating a control signal to control the second switching device adjacent to the positive electrode of the battery device to be turned off when the voltage detected by the first voltage detecting part is outside a voltage threshold range.

The battery protection apparatus according to at least one embodiment of the present disclosure further includes a second control part connected between a second switching part of the second switching device adjacent to the positive electrode of the battery device and the second logic processor.

According to the battery protection device of at least one embodiment of the present disclosure, when the voltage detected by the first voltage detection part is outside a voltage threshold range, the second logic processor generates a control signal, and the second control part turns off the second switching part of the second switching device adjacent to the positive electrode of the battery device based on the control signal.

The battery protection device according to at least one embodiment of the present disclosure further includes a second voltage detection part that detects a positive electrode voltage of the battery device, and the second logic processor outputs a control signal to turn off a second switching part of the second switching device adjacent to a positive electrode of the battery device when the positive electrode voltage of the battery device detected by the second voltage detection part is greater than a threshold voltage.

The battery protection apparatus according to at least one embodiment of the present disclosure further includes a current detection part that detects a current in a circuit between the second switching device adjacent to the positive electrode of the battery device and the positive electrode of the battery device, and the second logic processor outputs a control signal to turn off the second switching part of the second switching device adjacent to the positive electrode of the battery device when the current detected by the current detection part is greater than a threshold current.

According to the battery protection device of at least one embodiment of the present disclosure, the second switching device further includes a second temperature acquisition unit, the second temperature acquisition unit acquires a temperature of the second switching unit, or acquires a temperature of an area adjacent to the second switching unit, and when the temperature acquired by the second temperature acquisition unit of the second switching device adjacent to the positive electrode of the battery device is greater than or equal to a threshold temperature, the second logic processor outputs a control signal to turn off the second switching unit of the second switching device adjacent to the positive electrode of the battery device.

According to the battery protection device of at least one embodiment of the present disclosure, the battery protector further includes a buffer, the buffer transmits the voltage of the positive electrode of the battery cell to the second logic processor in a voltage value of a set proportion, and the second logic processor can generate a control signal to control the second switching portion of the second switching device adjacent to the positive electrode of the battery device based on the voltage value transmitted by the buffer.

According to the battery protection device of at least one embodiment of the present disclosure, the second logic processor obtains a voltage difference between the voltage transmitted by the buffer and the voltage detected by the first voltage detection part, and generates a control signal to turn off the second switching part when the voltage difference is outside a threshold voltage difference range.

According to the battery protection device of at least one embodiment of the present disclosure, the second logic processor obtains a voltage difference between the voltage transmitted by the buffer and the voltage detected by the second voltage detecting section, and generates a control signal to turn off the second switching section when the voltage difference is outside a threshold voltage difference range.

According to the battery protection device according to at least one embodiment of the present disclosure, the second logic processor obtains a loop impedance and each switch impedance based on the obtained voltage difference between the voltage transmitted from the buffer and the voltage detected by the first voltage detection unit, the obtained voltage difference between the voltage transmitted from the buffer and the voltage detected by the second voltage detection unit, the obtained voltage difference between the voltage detected by the first voltage detection unit and the voltage detected by the second voltage detection unit, the obtained current collected by the second current collection unit, and the obtained current collected by the current detection unit.

According to still another aspect of the present disclosure, there is provided a battery device including: any one of the above battery protection devices, and a battery cell.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is a schematic circuit configuration diagram of a battery protection apparatus according to an embodiment of the present disclosure.

Fig. 2 is a schematic circuit configuration diagram of a battery protection apparatus according to still another embodiment of the present disclosure.

Fig. 3 is a schematic circuit configuration diagram of a battery protection apparatus according to still another embodiment of the present disclosure.

Fig. 4 is a schematic circuit configuration diagram of a battery protection apparatus according to still another embodiment of the present disclosure.

Fig. 5 is a schematic circuit configuration diagram of a battery protection apparatus according to still another embodiment of the present disclosure.

Description of the reference numerals

10 electric core

100 cell protector

101 first switch part

102 first voltage collecting part

103 first logical processor

104 first control part

105 second current collecting part

106 second voltage collecting part

107 first current collecting part

108 first temperature acquisition part

109 control signal line

110 filter circuit

111 buffer

200 switching device

201 second switch part

208 second temperature acquisition part

300 second logical processor

301 first voltage detecting part

302 second control part

303 current detecting part

304 second voltage detection unit.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.

The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.

When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.

For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," below … …, "" below … …, "" below, "" above … …, "" above, "" … …, "" higher, "and" side (e.g., "in the sidewall") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.

Fig. 1 is a schematic circuit configuration diagram of a battery protection apparatus according to an embodiment of the present disclosure. Fig. 2 is a schematic circuit configuration diagram of a battery protection apparatus according to still another embodiment of the present disclosure. Fig. 3 is a schematic circuit configuration diagram of a battery protection apparatus according to still another embodiment of the present disclosure. Fig. 4 is a schematic circuit configuration diagram of a battery protection apparatus according to still another embodiment of the present disclosure. Fig. 5 is a schematic circuit configuration diagram of a battery protection apparatus according to still another embodiment of the present disclosure.

According to one embodiment of the present disclosure, as shown in fig. 1, a battery protection device includes: battery protector 100, battery protector 100 includes:

a first switching unit 101, the first switching unit 101 being connected between the positive electrode of the battery cell 10 of the battery device and the positive electrode of the battery device;

a first voltage acquisition unit 102, wherein the first voltage acquisition unit 102 acquires the voltage of the positive electrode of the battery cell 10;

the first logic processor 103 is connected to the first voltage collecting unit 102 and the first switching unit 101, respectively, and when the positive voltage of the battery cell 10 collected by the first voltage collecting unit 102 is out of the first threshold voltage range, the first logic processor 103 outputs a first control signal, and the first switching unit 101 is turned off based on the first control signal.

The first threshold voltage range may be a positive voltage threshold range or a negative voltage threshold range.

The first logic processor 103 may be a processing circuit for solidifying processing logic, which may be a part of an integrated circuit in a chip.

In this embodiment, by providing the first switch unit 101, when the voltage of the positive electrode of the battery cell 10 is too large, the first switch unit 101 is turned off, and the path between the battery cell 10 and the load of the battery device or the charger is turned off.

The battery protector 100 of the present embodiment may be in the form of a semiconductor chip.

The battery protection device of the present embodiment can satisfy the condition that the battery cell 10 is a single battery and the power is less than 30W.

With the battery protection apparatus according to the above-described embodiment, it is preferable that the battery protector 100 further includes a first control unit 104, as shown in fig. 1, and the first control unit 104 is connected between the first switch unit 101 and the first logic processor 103.

With regard to the battery protection device of each of the above embodiments, preferably, when the voltage of the positive electrode of the battery cell 10 collected by the first voltage collecting part 102 is outside the first threshold voltage range, the first logic processor 103 generates a first control signal, and the first control part 104 turns off the first switch part 101 based on the first control signal.

For the battery protection device of the above embodiment, it is preferable that the first voltage collecting part 102 includes a first comparator, when the voltage of the positive electrode of the battery cell 10 collected by the first voltage collecting part 102 is outside the first threshold voltage range, the first voltage collecting part 102 outputs a first comparison signal to the first logic processor 103, and the first logic processor 103 generates the first control signal based on the first comparison signal.

For the battery protection device of the above embodiment, preferably, the battery protector 100 further includes a second voltage collecting part 106, the second voltage collecting part 106 collects the voltage of the positive electrode of the battery device, when the voltage of the positive electrode of the battery device collected by the second voltage collecting part 106 is outside the second threshold voltage range, the first logic processor 103 outputs the second control signal, and the first switch part 101 is turned off based on the second control signal.

The second threshold voltage range may be a positive voltage threshold range or a negative voltage threshold range.

The second voltage collecting part 106 may include a second comparator, when the positive voltage of the battery device collected by the second voltage collecting part 106 is out of the second threshold voltage range, the second voltage collecting part 106 outputs a second comparison signal to the first logic processor 103, and the first logic processor 103 generates a second control signal to the first control part 104 based on the second comparison signal.

The battery protector 100 determines whether the battery device is connected to a load or a charging device based on the positive voltage of the battery device collected by the second voltage collecting unit.

The battery protector 100 determines whether the first switching unit 101 needs to be turned off or the first switching unit 101 needs to be turned on based on whether a load or a charging device is connected to the battery device.

For example, when the battery device is connected with a load or a charging device, and the voltage of the positive electrode of the battery device is within the second threshold range, if the first switching part 101 is currently in the off state, the battery protector 100 generates a control signal to control the first switching part 101 to restore the on state.

Preferably, the second voltage collecting part 106 includes a comparator and a current source.

As shown in fig. 1, the second voltage acquisition unit 106 includes a comparator and a current source, and determines whether or not a load or a charging device is connected to the battery device by allowing the battery protector 100 to acquire a positive voltage value of the battery device based on the current source.

With the battery protection apparatus of each of the above embodiments, preferably, the battery protector 100 obtains a voltage difference between the voltage collected by the first voltage collecting part 102 and the voltage collected by the second voltage collecting part 106, and when the voltage difference is outside a threshold voltage difference range, the battery protector 100 generates a control signal to turn off the first switching part 101.

The threshold voltage difference range is a positive voltage difference range and a negative voltage difference range, for example, -0.3V- +1V, and those skilled in the art can set and adjust the threshold voltage difference range.

For the battery protection device of the above embodiment, preferably, the battery protector 100 further includes a first current collecting part 107, the first current collecting part 107 is configured to collect the driving current of the first control part 104, and when the driving current is out of the driving current threshold range, the first logic processor 103 stops outputting the control signal to the first control part 104.

Preferably, the battery protector 100 further includes a first current collecting part 107, the first current collecting part 107 is configured to collect the driving current of the first control part 104, and when the driving current is out of the driving current threshold range, the battery protector 100 generates the recording information and/or generates the alarm signal.

For example, if the first control section 104 outputs a control signal to the first switching section 101, but does not output with a normal driving current within the driving current threshold range or with a normal driving voltage, the battery protector 100 will generate the record information, and more preferably, an alarm signal.

With the battery protection device of the above embodiment, it is preferable that the first current collecting part 107 includes the third comparator.

When the driving current is out of the driving current threshold range, the first current collection part 107 outputs a third comparison signal, and the first logic processor 103 stops outputting the control signal to the first control part 104 based on the third comparison signal.

The second threshold current range may be a positive current threshold range or a negative current threshold range.

The first control portion 104 may be a control signal line or other forms.

For the battery protection device of the above embodiment, preferably, the battery protector 100 further includes a second current collecting part 105, the second current collecting part 105 collects a current in a circuit between the first switching part 101 and the positive electrode of the battery device, when the current collected by the second current collecting part 105 is outside the second threshold current range, the first logic processor 103 outputs a fourth control signal, and the first switching part 101 is turned off based on the fourth control signal.

The second current collecting part 105 may include a fourth comparator, when the current collected by the second current collecting part 105 is out of the second threshold current range, the second current collecting part 105 outputs a fourth comparison signal to the first logic processor 103, and the first logic processor 103 generates a fourth control signal to the first control part 104 based on the fourth comparison signal.

For the battery protection device of the above embodiment, preferably, the battery protector 100 further includes a first temperature collection unit 108, the first temperature collection unit 108 collects the temperature of the first switch unit 101, or collects the temperature of an area adjacent to the first switch unit 101, when the temperature collected by the first temperature collection unit 108 is greater than or equal to a threshold temperature, the first logic processor 103 outputs a fifth control signal, and the first switch unit 101 is turned off based on the fifth control signal.

Since the first temperature collecting part 108 transmits the collected temperature signal to the first logic processor 103, when the temperature collected by the first temperature collecting part 108 is greater than or equal to the threshold temperature, the first logic processor 103 generates a fifth control signal to the first control part 104.

In the battery protection device according to the above-described embodiment, the first switch 101 is preferably a field effect transistor.

The first switching section 101 is preferably a MOSFET, and the first control section 104 described above is connected between the gate of the MOSFET and the first logic processor 103.

Here, the first switching portion 101 is a single MOSFET or a combination of a plurality of MOSFETs.

Since the battery device may face situations such as reverse connection of the charging device, the first switching portion 101 of the present disclosure preferably has sufficient positive and negative withstand voltage, and the first switching portion 101 preferably has bidirectional blocking capability.

For the battery protection device of the above embodiment, preferably, the battery protector 100 further includes a filter circuit 110, and the first voltage collecting part 102 collects the positive voltage of the battery cell 10 filtered by the filter circuit 110.

Wherein the filter circuit may be an RC filter circuit.

The battery cell 10 described above may include one or more than two battery cells.

Fig. 2 is a schematic circuit configuration diagram of a battery protection device according to still another preferred embodiment of the present disclosure.

As shown in fig. 2, the battery protection device according to each of the above embodiments further includes:

a second switching device 200, the second switching device 200 being connected between the battery protector 100 and the positive electrode of the battery device, the second switching device 200 including a second switching section 201;

a first voltage detection unit 301, the first voltage detection unit 301 detecting a voltage between the battery protector 100 and the second switching device 200; and the number of the first and second groups,

the second logic processor 300, when the voltage detected by the first voltage detecting part 301 is out of the voltage threshold range, the second logic processor 300 generates a control signal to control the second switching device 200 to turn off.

The second logic processor 300 may be a software-based processor, such as a single chip microcomputer.

As shown in fig. 2, the battery protection apparatus according to the above-described embodiment preferably further includes a second control unit 302, and the second control unit 302 is connected between the second switch unit 201 and the second logic processor 300.

As shown in fig. 2, with the battery protection device of the above embodiment, it is preferable that when the voltage detected by the first voltage detection section 301 is outside the voltage threshold range, the second logic processor 300 generates a control signal, and the second control section 302 turns off the second switch section 201 based on the control signal.

As shown in fig. 2, it is preferable that the battery protection device according to the above embodiment further includes a second voltage detection unit 304, the second voltage detection unit 304 detects a positive voltage of the battery device, and when the positive voltage of the battery device collected by the second voltage detection unit 304 is greater than a threshold voltage, the second logic processor 300 outputs a control signal to turn off the second switch unit 201.

Preferably, the second logic processor 300 acquires a voltage difference between the voltage detected by the first voltage detecting part 301 and the voltage detected by the second voltage detecting part 304, and when the voltage difference is out of the range of the threshold voltage difference, the second logic processor 300 generates a control signal to turn off the second switching part 201.

The threshold voltage difference range is a positive voltage difference range and a negative voltage difference range, and those skilled in the art can set and adjust the threshold voltage difference range.

This embodiment can avoid the failure caused by the excessive voltage difference between both ends of the MOSFET due to the excessive internal Resistance (RDSON) or the excessive current of the second switching unit 201 when the second switching unit 201 (for example, MOSFET) is turned on.

The first voltage detection unit 301 and the second voltage detection unit 304 may be detection lines.

As shown in fig. 2, it is preferable for the battery protection device of the above embodiment to further include a current detection unit 303, wherein the current detection unit 303 detects a current in a circuit between the second switch unit 201 and the positive electrode of the battery device, and when the current detected by the current detection unit 303 is greater than a threshold current, the second logic processor 300 outputs a control signal to turn off the second switch unit 201.

As shown in fig. 2, for the battery protection device of the above embodiment, it is preferable that the second switching device 200 further includes a second temperature collection unit 208, the second temperature collection unit 208 collects the temperature of the second switching unit 201, or collects the temperature of an area adjacent to the second switching unit 201, and when the temperature collected by the second temperature collection unit 208 is greater than or equal to a threshold temperature, the second logic processor 300 outputs a control signal to turn off the second switching unit 201.

As shown in fig. 2, in the battery protection device according to the above embodiment, the second switch 201 is preferably a field effect transistor.

Wherein the second switching part 201 is a single MOSFET or a combination of a plurality of MOSFETs.

Since the battery device may face situations such as reverse connection of the charging device, the second switching section 201 of the present disclosure is also preferably able to withstand sufficient positive and negative withstand voltages, and the second switching section 201 preferably has a bidirectional blocking capability.

As shown in fig. 2, for the battery protection device of the above embodiment, it is preferable that the battery protector 100 further includes a buffer 111, the buffer 111 transmits the voltage of the positive electrode of the battery cell 10 to the second logic processor 300 at a voltage value of a set ratio, and the second logic processor 300 is capable of generating a control signal to control the second switch unit 201 based on the voltage value transmitted by the buffer 111.

The set ratio described above may be 1:1, 1:2, etc.

As shown in fig. 2, with the battery protection apparatus of the above embodiment, it is preferable that the first logic processor 103 and the second logic processor 300 are connected via the control signal line 109 so that the control signal generated by the second logic processor 300 can be transmitted to the first logic processor 103 and/or so that the control signal generated by the first logic processor 103 can be transmitted to the second logic processor 300.

With the battery protection device of the present disclosure, a person skilled in the art can set, adjust, etc. the threshold voltage, the threshold temperature, etc. described above based on the power of the battery device, the number of battery cells, etc.

Here, the second switching device 200 in this embodiment may be a separate chip or a part of a chip.

A battery protection apparatus according to still another preferred embodiment of the present disclosure, as shown in fig. 3, includes:

at least two second switching devices 200, the at least two second switching devices 200 being connected in series between the positive electrode of the battery cell 10 of the battery device and the positive electrode of the battery device, the second switching devices 200 including a second switching part 201; and the number of the first and second groups,

battery protector 100, battery protector 100 includes:

the first logic processor 103 is connected to the first voltage collecting part 102 and the second switching part 201 of the second switching device 200 adjacent to the battery cell 10, respectively, and when the positive voltage of the battery cell 10 collected by the first voltage collecting part 102 is out of the first threshold voltage range, the first logic processor 103 outputs a first control signal, and the second switching part 201 is turned off based on the first control signal.

As shown in fig. 3, for the battery protection device of the above embodiment, it is preferable that the battery protector 100 further includes a first control unit 104, and the first control unit 104 is connected between the second switch unit 201 of the second switch device 200 adjacent to the battery cell 10 and the first logic processor 103.

As shown in fig. 3, for the battery protection device of each of the above embodiments, it is preferable that when the positive electrode voltage of the battery cell 10 collected by the first voltage collecting part 102 is out of the first threshold voltage range, the first logic processor 103 generates a first control signal, and the first control part 104 turns off the second switching part 201 of the second switching device 200 adjacent to the battery cell 10 based on the first control signal.

As shown in fig. 3, for the battery protection device of each of the above embodiments, it is preferable that the first voltage collecting part 102 includes a first comparator, when the voltage of the positive electrode of the battery cell 10 collected by the first voltage collecting part 102 is outside the first threshold voltage range, the first voltage collecting part 102 outputs a first comparison signal to the first logic processor 103, and the first logic processor 103 generates the first control signal based on the first comparison signal.

As shown in fig. 3, for the battery protection device of each of the above embodiments, preferably, the battery protector 100 further includes a second voltage collecting part 106, the second voltage collecting part 106 collects the voltage of the positive electrode of the battery device, when the voltage of the positive electrode of the battery device collected by the second voltage collecting part 106 is outside the second threshold voltage range, the first logic processor 103 outputs a second control signal, and the second switching part 201 of the second switching device 200 adjacent to the battery cell 10 is turned off based on the second control signal.

As shown in fig. 3, for the battery protection device of each of the above embodiments, preferably, the battery protector 100 further includes a first current collecting part 107, where the first current collecting part 107 is configured to collect a driving current of a second switching part 201 of a second switching device 200 adjacent to the battery cell 10, and when the driving current is outside a driving current threshold range, the first logic processor 103 stops outputting the control signal to the second switching part 201 of the second switching device 200 adjacent to the battery cell 10.

As shown in fig. 3, for the battery protection device of each of the above embodiments, it is preferable that the first current collecting part 107 includes a third comparator.

As shown in fig. 3, for the battery protection device of each of the above embodiments, preferably, the battery protector 100 further includes a second current collecting part 105, the second current collecting part 105 collects a current in a circuit between a second switching part 201 of the second switching device 200 adjacent to the battery cell 10 and the positive electrode of the battery device, when the current collected by the second current collecting part 105 is outside a second threshold current range, the first logic processor 103 outputs a fourth control signal, and the second switching part 201 of the second switching device 200 adjacent to the battery cell 10 is turned off based on the fourth control signal.

As shown in fig. 3, for the battery protection device of each of the above embodiments, preferably, the second switch device 200 further includes a second temperature collection unit 208, the second temperature collection unit 208 collects a temperature of the second switch unit 201 of the second switch device 200 adjacent to the battery cell 10, or a temperature of an area where the second switch unit 201 of the second switch device 200 adjacent to the battery cell 10 is located, when the temperature collected by the second temperature collection unit 208 is greater than or equal to a threshold temperature, the first logic processor 103 outputs a fifth control signal, and the second switch unit 201 of the second switch device 200 adjacent to the battery cell 10 is turned off based on the fifth control signal.

As shown in fig. 3, the battery protection device according to each of the above embodiments preferably further includes:

a first voltage detection unit 301, the first voltage detection unit 301 detecting a voltage between the two second switching devices 200; and the number of the first and second groups,

and a second logic processor 300 generating a control signal to control the second switching device 200 adjacent to the positive electrode of the battery device to be turned off when the voltage detected by the first voltage detecting part 301 is out of the voltage threshold range.

As shown in fig. 3, for the battery protection device of each of the above embodiments, it is preferable that the battery protection device further includes a second control unit 302, and the second control unit 302 is connected between the second switching unit 201 of the second switching device 200 adjacent to the positive electrode of the battery device and the second logic processor 300.

As shown in fig. 3, with the battery protection apparatus according to each of the above embodiments, it is preferable that when the voltage detected by the first voltage detection unit 301 is out of the voltage threshold range, the second logic processor 300 generates a control signal, and the second control unit 302 turns off the second switching unit 201 of the second switching device 200 adjacent to the positive electrode of the battery device based on the control signal.

As shown in fig. 3, for the battery protection device of each of the above embodiments, it is preferable that the battery protection device further includes a second voltage detection unit 304, the second voltage detection unit 304 detects a voltage of the positive electrode of the battery device, and when the voltage of the positive electrode of the battery device detected by the second voltage detection unit 304 is greater than a threshold voltage, the second logic processor 300 outputs a control signal to turn off the second switching unit 201 of the second switching device 200 adjacent to the positive electrode of the battery device.

As shown in fig. 3, for the battery protection apparatus of each of the above embodiments, it is preferable that a current detection part 303 is further included, the current detection part 303 detects a current in a circuit between the second switching device 200 adjacent to the positive electrode of the battery apparatus and the positive electrode of the battery apparatus, and when the current detected by the current detection part 303 is greater than a threshold current, the second logic processor 300 outputs a control signal to turn off the second switching part 201 of the second switching device 200 adjacent to the positive electrode of the battery apparatus.

As shown in fig. 3, for the battery protection device of each of the above embodiments, it is preferable that the second switching device 200 further includes a second temperature collection part 208, the second temperature collection part 208 collects the temperature of the second switching part 201, or collects the temperature of the area adjacent to the second switching part 201, and when the temperature collected by the second temperature collection part 208 of the second switching device 200 adjacent to the positive electrode of the battery device is greater than or equal to the threshold temperature, the second logic processor 300 outputs a control signal to turn off the second switching part 201 of the second switching device 200 adjacent to the positive electrode of the battery device.

As shown in fig. 3, for the battery protection device of each of the above embodiments, preferably, the battery protector 100 further includes a buffer 111, the buffer 111 transmits the voltage of the positive electrode of the battery cell 10 to the second logic processor 300 at a voltage value of a set proportion, and the second logic processor 300 is capable of generating a control signal to control the second switching part 201 of the second switching device 200 adjacent to the positive electrode of the battery device based on the voltage value transmitted by the buffer 111.

The set ratio described above may be 1:1, 1:2, etc.

According to a preferred embodiment of the present disclosure, the second logic processor 300 obtains a voltage difference between the voltage transmitted by the buffer 111 and the voltage detected by the first voltage detecting part 301, and when the voltage difference is out of the range of the threshold voltage difference, the second logic processor 300 generates a control signal to turn off the second switching part 201.

According to a preferred embodiment of the present disclosure, the second logic processor 300 obtains a voltage difference between the voltage transmitted by the buffer 111 and the voltage detected by the second voltage detecting part 304, and when the voltage difference is out of the range of the threshold voltage difference, the second logic processor 300 generates a control signal to turn off the second switching part 201.

This embodiment can avoid an excessive impedance in the first switch 101 and the second switch 201.

According to the preferred embodiment of the present disclosure, the second logic processor 300 acquires the loop impedance and the impedance of each switch section (101, 201) based on the acquired voltage difference between the voltage transmitted by the buffer 111 and the voltage detected by the first voltage detection section 301, the voltage difference between the voltage transmitted by the buffer 111 and the voltage detected by the second voltage detection section 304, the voltage difference between the voltage detected by the first voltage detection section 301 and the voltage detected by the second voltage detection section 304, the current acquired by the second current acquisition section 105, and the current acquired by the current detection section 303.

As shown in fig. 3, for the battery protection apparatus of each of the above embodiments, it is preferable that the first logic processor 103 and the second logic processor 300 are connected via the control signal line 109 so that the control signal generated by the second logic processor 300 can be transmitted to the first logic processor 103 and/or so that the control signal generated by the first logic processor 103 can be transmitted to the second logic processor 300.

Fig. 4 is a schematic circuit configuration diagram of a battery protection device according to still another preferred embodiment of the present disclosure.

As shown in fig. 4, in the battery protection device shown in fig. 3, each second switching device 200 is connected in parallel to one second switching device 200, and two additional second switching devices 200 are connected in series between the battery cell 10 and the positive electrode of the battery device.

The battery protection device of the present embodiment has higher reliability, and can satisfy the condition that the battery cell 10 is a single battery and the power is greater than 30W.

Fig. 5 is a schematic circuit configuration diagram of a battery protection device according to still another preferred embodiment of the present disclosure.

As shown in fig. 5, in the battery protection apparatus shown in fig. 2, the battery protector 100 is connected in parallel with a new battery protector 100, the second switch device 200 is connected in parallel with a new second switch device 200, and the new battery protector 100 and the new second switch device 200 are connected in series between the battery cell 10 and the positive electrode of the battery device.

The present disclosure also provides a battery device according to at least one embodiment of the present disclosure, including: the battery protection device according to any one of the above embodiments.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

1. A battery protection device, comprising: a battery protector, said battery protector comprising:

the first voltage acquisition part acquires the voltage of the positive electrode of the battery cell; and

2. The battery protection device of claim 1, wherein the battery protector further comprises a first control section connected between the first switching section and the first logic processor.

3. The battery protection device according to claim 2, wherein when the positive voltage of the battery cell collected by the first voltage collection unit is outside a first threshold voltage range, the first logic processor generates a first control signal, and the first control unit turns off the first switching unit based on the first control signal.

4. The battery protection device according to claim 3, wherein the first voltage acquisition unit includes a first comparator, and when the positive voltage of the battery cell acquired by the first voltage acquisition unit is outside a first threshold voltage range, the first voltage acquisition unit outputs a first comparison signal to the first logic processor, and the first logic processor generates the first control signal based on the first comparison signal.

5. The battery protection device according to claim 1, wherein the battery protector further includes a second voltage acquisition unit that acquires a positive electrode voltage of the battery device, and when the positive electrode voltage of the battery device acquired by the second voltage acquisition unit is outside a second threshold voltage range, the first logic processor outputs a second control signal, and the first switching unit is turned off based on the second control signal.

6. The battery protection device according to claim 5, wherein the battery protector 100 determines whether a load or a charging device is connected to the battery device based on the positive electrode voltage of the battery device collected by the second voltage collecting unit.

7. The battery protection device of claim 6, wherein the second voltage acquisition portion comprises a comparator and a current source.

8. The battery protection device according to claim 5, wherein the battery protector obtains a voltage difference between the voltage collected by the first voltage collection portion and the voltage collected by the second voltage collection portion, and when the voltage difference is outside a threshold voltage difference range, the battery protector generates a control signal to turn off the first switching portion;

optionally, the battery protector further includes a first current collecting unit, where the first current collecting unit is configured to collect a driving current of the first control unit, and when the driving current is outside a driving current threshold range, the first logic processor stops outputting a control signal to the first control unit;

optionally, the battery protector further includes a first current collecting unit, where the first current collecting unit is configured to collect a driving current of the first control unit, and when the driving current is outside a driving current threshold range, the battery protector generates recording information and/or generates an alarm signal;

optionally, the first current collecting part comprises a third comparator;

optionally, the battery protector further includes a second current collecting part, the second current collecting part collects a current in a circuit between the first switching part and a positive electrode of the battery device, when the current collected by the second current collecting part is outside a second threshold current range, the first logic processor outputs a fourth control signal, and the first switching part is turned off based on the fourth control signal;

optionally, the battery protector further includes a first temperature acquisition unit, the first temperature acquisition unit acquires a temperature of the first switching unit, or acquires a temperature of an area adjacent to the first switching unit, when the temperature acquired by the first temperature acquisition unit is greater than or equal to a threshold temperature, the first logic processor outputs a fifth control signal, and the first switching unit is turned off based on the fifth control signal;

optionally, the first switching part is a field effect transistor;

optionally, the first switching section is a single MOSFET or a combination of a plurality of MOSFETs;

optionally, the battery protector further includes a filter circuit, and the first voltage collecting unit collects the positive voltage of the battery cell filtered by the filter circuit;

optionally, the battery cell includes one or more battery units;

optionally, the method further comprises:

a first voltage detection unit that detects a voltage between the battery protector and the second switching device; and

a second logic processor generating a control signal to control the second switching device to turn off when the voltage detected by the first voltage detecting part is outside a voltage threshold range;

optionally, the apparatus further comprises a second control unit, wherein the second control unit is connected between the second switch unit and the second logic processor;

optionally, when the voltage detected by the first voltage detection portion is outside a voltage threshold range, the second logic processor generates a control signal, and the second control portion turns off the second switch portion based on the control signal;

optionally, the battery device further comprises a second voltage detection unit, the second voltage detection unit detects a positive voltage of the battery device, and when the positive voltage of the battery device collected by the second voltage detection unit is greater than a threshold voltage, the second logic processor outputs a control signal to turn off the second switching unit;

optionally, the second logic processor obtains a voltage difference between the voltage detected by the first voltage detecting unit and the voltage detected by the second voltage detecting unit, and generates a control signal to turn off the second switch unit when the voltage difference is out of a threshold voltage difference range;

optionally, the battery device further comprises a current detection part, wherein the current detection part detects current in a circuit between the second switch part and the positive electrode of the battery device, and when the current detected by the current detection part is greater than a threshold current, the second logic processor outputs a control signal to turn off the second switch part;

optionally, the second switch device further includes a second temperature collecting portion, the second temperature collecting portion collects a temperature of the second switch portion, or collects a temperature of an area adjacent to the second switch portion, and when the temperature collected by the second temperature collecting portion is greater than or equal to a threshold temperature, the second logic processor outputs a control signal to turn off the second switch portion;

optionally, the second switching part is a field effect transistor;

optionally, the second switching section is a single MOSFET or a combination of a plurality of MOSFETs;

optionally, the battery protector further includes a buffer, where the buffer transmits the voltage of the positive electrode of the battery cell to the second logic processor in a voltage value with a set proportion, and the second logic processor is capable of generating a control signal to control the second switching unit based on the voltage value transmitted by the buffer;

optionally, the first logical processor and the second logical processor are connected via a control signal line, such that the control signal generated by the second logical processor can be transmitted to the first logical processor, and/or such that the control signal generated by the first logical processor can be transmitted to the second logical processor.

9. A battery protection device, comprising:

at least two second switching devices connected in series between the positive electrode of the battery cell of the battery device and the positive electrode of the battery device, the second switching devices including a second switching part; and

a battery protector, said battery protector comprising:

the first logic processor is respectively connected with the first voltage acquisition part and a second switching part of a second switching device close to the battery cell, when the positive voltage of the battery cell acquired by the first voltage acquisition part is out of a first threshold voltage range, the first logic processor outputs a first control signal, and the second switching part is turned off based on the first control signal;

optionally, the battery protector further includes a first control unit, where the first control unit is connected between a second switching unit of a second switching device adjacent to the battery cell and the first logic processor;

optionally, when the voltage of the positive electrode of the battery cell acquired by the first voltage acquisition unit is outside a first threshold voltage range, the first logic processor generates a first control signal, and the first control unit turns off a second switching unit of a second switching device adjacent to the battery cell based on the first control signal;

optionally, the first voltage collecting part includes a first comparator, and when the positive voltage of the battery cell collected by the first voltage collecting part is out of a first threshold voltage range, the first voltage collecting part outputs a first comparison signal to the first logic processor, and the first logic processor generates the first control signal based on the first comparison signal;

optionally, the battery protector further includes a second voltage collecting unit, where the second voltage collecting unit collects a positive voltage of the battery device, and when the positive voltage of the battery device collected by the second voltage collecting unit is outside a second threshold voltage range, the first logic processor outputs a second control signal, and a second switching unit of a second switching device adjacent to the battery cell is turned off based on the second control signal;

optionally, the battery protector further includes a first current collecting unit, where the first current collecting unit is configured to collect a driving current of a second switching unit of a second switching device adjacent to the battery cell, and when the driving current is outside a driving current threshold range, the first logic processor stops outputting a control signal to the second switching unit of the second switching device adjacent to the battery cell;

optionally, the first current collecting part comprises a third comparator;

optionally, the battery protector further includes a second current collecting part, where the second current collecting part collects a current in a circuit between a second switching part of a second switching device adjacent to the battery cell and a positive electrode of the battery device, and when the current collected by the second current collecting part is outside a second threshold current range, the first logic processor outputs a fourth control signal, and the second switching part of the second switching device adjacent to the battery cell is turned off based on the fourth control signal;

optionally, the second switching device further includes a second temperature acquisition unit, where the second temperature acquisition unit acquires a temperature of a second switching unit of the second switching device adjacent to the battery cell, or acquires a temperature of an area where the second switching unit of the second switching device adjacent to the battery cell is located, and when the temperature acquired by the second temperature acquisition unit is greater than or equal to a threshold temperature, the first logic processor outputs a fifth control signal, and the second switching unit of the second switching device adjacent to the battery cell is turned off based on the fifth control signal;

optionally, the method further comprises:

a first voltage detection section that detects a voltage between the two second switching devices; and

a second logic processor generating a control signal to control the second switching device adjacent to the positive electrode of the battery device to be turned off when the voltage detected by the first voltage detecting part is outside a voltage threshold range;

optionally, the battery device further comprises a second control part connected between a second switching part of the second switching device adjacent to the positive electrode of the battery device and the second logic processor;

optionally, when the voltage detected by the first voltage detection part is out of a voltage threshold range, the second logic processor generates a control signal, and the second control part turns off a second switching part of the second switching device adjacent to the positive electrode of the battery device based on the control signal;

optionally, the battery pack further comprises a second voltage detection part, wherein the second voltage detection part detects the voltage of the positive electrode of the battery device, and when the voltage of the positive electrode of the battery device detected by the second voltage detection part is greater than a threshold voltage, the second logic processor outputs a control signal to turn off a second switch part of the second switch device adjacent to the positive electrode of the battery device;

optionally, the battery device further comprises a current detection part, wherein the current detection part detects current in a circuit between the second switch device close to the positive pole of the battery device and the positive pole of the battery device, and when the current detected by the current detection part is larger than a threshold current, the second logic processor outputs a control signal to turn off the second switch part of the second switch device close to the positive pole of the battery device;

optionally, the second switching device further includes a second temperature collecting part, the second temperature collecting part collects a temperature of the second switching part, or collects a temperature of an area adjacent to the second switching part, and when the temperature collected by the second temperature collecting part of the second switching device adjacent to the positive electrode of the battery device is greater than or equal to a threshold temperature, the second logic processor outputs a control signal to turn off the second switching part of the second switching device adjacent to the positive electrode of the battery device;

optionally, the battery protector further includes a buffer, the buffer transmits the voltage of the positive electrode of the battery cell to the second logic processor in a voltage value with a set proportion, and the second logic processor is capable of generating a control signal to control a second switching portion of the second switching device adjacent to the positive electrode of the battery device based on the voltage value transmitted by the buffer;

optionally, the second logic processor obtains a voltage difference between the voltage transmitted by the buffer and the voltage detected by the first voltage detection unit, and generates a control signal to turn off the second switch unit when the voltage difference is out of a threshold voltage difference range;

optionally, the second logic processor obtains a voltage difference between the voltage transmitted by the buffer and the voltage detected by the second voltage detection unit, and generates a control signal to turn off the second switch unit when the voltage difference is out of a threshold voltage difference range;

optionally, the second logic processor obtains loop impedances and respective switch section impedances based on the obtained voltage difference between the voltage transmitted by the buffer and the voltage detected by the first voltage detection section, the voltage difference between the voltage transmitted by the buffer and the voltage detected by the second voltage detection section, the voltage difference between the voltage detected by the first voltage detection section and the voltage detected by the second voltage detection section, the current collected by the second current collection section, and the current collected by the current detection section;

10. A battery device, comprising: the battery protection device of any one of claims 1 to 9.