TWI605629B - Battery device and method for detecting external force thereof - Google Patents

Description

Battery device and external force detecting method thereof

The present invention relates to a battery device and an external force detecting method thereof, and more particularly to a battery device for detecting an external force condition of a battery and an external force detecting method thereof.

With the increasing demand for portable electronic devices such as notebook computers, mobile phones, video cameras, and digital cameras, the demand for secondary batteries having high energy density and being a power source for portable electronic devices has also risen. In addition, the secondary batteries required for electric vehicles are also increasing. Among them, a battery device such as a secondary battery is, for example, a lithium ion battery.

However, in the verification process of the conventional battery device, when the battery device is often subjected to an abnormal force and collided, the rear-end maintenance personnel can only determine whether the battery device is subjected to an abnormal external force according to the appearance of the battery device; or It is the back-end maintenance personnel who often need to disassemble the battery device and other products, and perform the inspection of specific parts, parts or circuits according to the failure function of the battery device. In particular, in the event of an abnormality in the battery device, there is a possibility that the life of the user or the maintenance personnel may be threatened, thereby causing inconvenience in use and life safety.

The present invention provides a battery device and an external force detecting method thereof, which are configured to pass through a pressure sensing portion to detect that a battery device is subjected to an abnormal force, collide, crush, or drop, thereby achieving the purpose of protecting the battery device and analyzing the battery device. .

The invention provides a battery device comprising a battery core and a casing. The housing is used to cover or cover the battery core. The battery device further includes a pressure sensing portion disposed on the first The battery core is between a casing. Wherein, when the housing is subjected to an external force, the pressure sensing portion receives an external force, and the external force is greater than a pressure threshold value, and the pressure sensing portion in a first state is converted into a second state that can be recorded, The second state is different from the first state.

The invention provides a battery device external force detecting method, which is suitable for a battery device, a battery device, a battery core and a casing, the casing is used for covering or covering the battery core, and the external force detecting method comprises: providing a pressure sensing portion a battery core and a casing; when the casing is subjected to an external force, the pressure sensing portion receives an external force, and the external force is greater than a pressure threshold, and the pressure sensing portion in a first state is converted into a A second state of the record, the second state being different from the first state.

The battery device of the present invention transmits a pressure sensing portion to sense an external force received by the battery device. Wherein, when the external force is greater than the pressure threshold, the battery device can be analyzed by the pressure sensing portion to cause the product to be subjected to collision, crushing or impact, thereby protecting the battery device and the recording process. As a result, the present invention does improve the safety of the battery device, and records the situation in which the battery device is hit, impacted, or dropped from a height to cause a malfunction, damage, or malfunction.

The above summary and the following examples are intended to illustrate the technical means and functions of the present invention, and the embodiments and the drawings are intended to be illustrative only and not to limit the invention.

1, 1a‧‧‧ battery device

10‧‧‧ battery core

12, 12a, 12b, 12c‧‧‧ Pressure Sensing Department

120‧‧‧Color forming layer

122‧‧‧Color layer

B1‧‧‧ first basal layer

B2‧‧‧Second basal layer

BL‧‧‧ basal layer

14‧‧‧Shell

S1‧‧‧ first housing

S2‧‧‧ second housing

16‧‧‧Battery Management Unit

160‧‧‧Processing unit

162‧‧‧protection unit

164‧‧‧Switch unit

R1‧‧‧Pressure sensing resistor, pressure sensing film

R2‧‧‧voltage resistor

PS‧‧‧voltage source

SW1‧‧‧Discharge switch

SW2‧‧‧Charge switch

FS‧‧‧ first end

SS‧‧‧ second end

F‧‧‧External force

FA‧‧‧Resident Area

Ob‧‧‧ objects

S801~S809‧‧‧ Process steps

1 is a perspective view of a battery device according to an embodiment of the present invention.

2 is a schematic cross-sectional view showing a pressure sensing portion according to another embodiment of the present invention.

2A is a schematic cross-sectional view showing a pressure sensing portion according to another embodiment of the present invention.

3 is a perspective view of a battery device according to another embodiment of the present invention.

3A is a schematic cross-sectional view showing a battery device according to another embodiment of the present invention.

4 is a functional block diagram of a battery core, a pressure sensing portion, and a battery management unit according to another embodiment of the present invention.

FIG. 5 is a schematic diagram of waveforms of external force-pressure sensing resistors of various pressure sensing portions according to another embodiment of the present invention.

FIG. 6 is a schematic diagram showing the waveform of force-divided pressure of a plurality of voltage dividing resistors by a pressure sensing portion according to another embodiment of the present invention.

FIG. 7 is a schematic diagram of a pressure sensing unit and a battery management unit according to another embodiment of the present invention.

FIG. 8 is a flowchart of a method for detecting an external force of a battery device according to another embodiment of the present invention.

1 is a perspective view of a battery device according to an embodiment of the present invention. Please refer to Figure 1. A battery device 1 includes a battery core 10, a pressure sensing portion 12, and a housing 14. The pressure sensing portion 12 is located between the battery core 10 and the housing 14 . The pressure sensing portion 12 is for covering or covering the battery core 10. The housing 14 is used to cover or cover the pressure sensing portion 12. In practice, the battery cell 10 is, for example, a lithium battery, a Polymide battery, a rechargeable battery, or other battery. The battery core 10 is a charged can body. In order to avoid short-circuiting of the battery cell 10 when the charged can body is in contact with other conductive objects, a housing 14 of an insulating film or an insulating layer is usually coated on the outside of the charging can.

The pressure sensing portion 12 of the present invention is disposed between the battery cell 10 and the housing 14 to cause deformation or damage of the housing 14 when the battery device 1 is subjected to an external force, so that the pressure sensing portion 12 senses that the external force is greater than a pressure threshold. The value, the pressure sensing unit 12 converts from a first state to a second state. That is, the user can recognize whether the battery device 1 is subjected to an external force collision, impact, or damage through the pressure sensing portion 12.

For convenience of explanation, the battery device 1 of the present embodiment will be described with a battery of No. 3 or AA. In other embodiments, the battery device 1 can also be another battery, a mobile power source, a PDA, a smart phone, a road navigation machine, or other device. The pressure sensing portion 12 is, for example, a pressure sensing film, a pressure sensing film, or a pressure sensing layer. The housing 14 is, for example, a housing that is transparent, see-through or of other materials. Therefore, the battery device 1 is subjected to an external force collision, causing the pressure sensing portion 12 to sense that the external force is greater than a pressure threshold. The value, the pressure sensing unit 12 converts from a first state to a second state.

Further, the pressure sensing portion 12 is a pressure sensing film realized by, for example, a physical structure, a chemical structure, a piezoresistive strain sensor, or a circuit. Wherein, when the pressure sensing portion 12 receives an external force and the external force is greater than the pressure threshold value, for example, the pressure sensing portion 12 has a physical structure, the first state and the second state are respectively a first physical phenomenon and a second physical phenomenon. . Therefore, the user can distinguish the difference between the first physical phenomenon and the second physical phenomenon. For example, the first state is that all of the battery surfaces are white. In the second state, the surface of the battery in the stressed area is reddish, and the remaining surface area is still white.

For another example, the pressure sensing portion 12 has a chemical structure, and the first state and the second state are a first chemical phenomenon and a second chemical phenomenon, respectively. Therefore, the user can distinguish the difference between the first chemical phenomenon and the second chemical phenomenon. For example, the first state is that all of the battery surfaces are in a liquid state, while in the second state, the surface of the battery in the stressed region is crystalline or solid, and the remaining regions are still in a liquid state. That is, the first chemical phenomenon means that the pressure sensing portion 12 is a supersaturated solution film. The second chemical phenomenon refers to a phenomenon in which a partial or all of the supersaturated solution film is in contact with the seed crystal, and is completely crystallized by liquefaction, solidification and condensation.

For another example, the pressure sensing unit 12 has a pressure sensing film of the piezoresistive strain sensor. The first state and the second state respectively generate a first and a second voltage dividing signal by the pressure sensing unit 12 . Therefore, the battery management unit (not shown) in the battery device 1 can distinguish the first and second voltage division signals. For example, the second voltage division signal is greater than the first voltage division signal, whereby the battery device 1 distinguishes between being subjected to an external force and activating the protection mechanism. This embodiment does not limit the aspect or operational aspect of the pressure sensing unit 12, the first state, the second state, and the like.

Next, the detailed structure and operation of the pressure sensing unit 12, the battery device 1, and the like will be further described.

2 is a schematic cross-sectional view showing a pressure sensing portion according to another embodiment of the present invention. Please refer to Figure 1. The pressure sensing portion 12 includes a first substrate layer B1, a color forming layer 120, A color grading layer 122 and a second substrate layer B2. In practice, the color forming layer 120 connects the first substrate layer B1 and the color layer 122. The color grading layer 122 connects the color forming layer 120 and the second substrate layer B2. The first and second substrate layers B1, B2 are, for example, polyester bases, respectively.

The color forming layer 120 includes, for example, a plurality of color spheres attached to the first base layer B1. These chromospheres are, for example, red, blue, green, yellow or chromatic spheres of other colors. When the external force F acts on the intermediate portion of the first base layer B1, the chromatic spheres of the force receiving area FA with respect to the intermediate portion are crushed by the external force F and are broken, so that the dye coated in the chromosphere flows out.

The color grading layer 122 is, for example, a white paper, a white cloth, a material that can absorb dye, or a material of other colors. As the dye of the broken chromosphere flows out, the dye will flow into the color grading layer 122. Therefore, the color grading layer 122 will be contaminated by the dye of the broken chromosphere. Therefore, the user can recognize from the surface of the battery device 1 the position at which the battery device 1 is subjected to the external force F.

2A is a schematic cross-sectional view showing a pressure sensing portion according to another embodiment of the present invention. Please refer to Figure 1. The structure of the pressure sensing portions 12a, 12 in FIG. 2A and FIG. 2 is similar in structure, and the same elements that are included in the following will be denoted by the same reference numerals. The difference between the pressure sensing portions 12a, 12 is that the pressure sensing portion 12a includes a color forming layer 120, a color grading layer 122, and a base layer BL.

In practice, the color grading layer 122 connects the color forming layer 120 and the base layer BL. Here, if an object Ob collides with the color forming layer 120, for example, the intermediate portion of the color forming layer 120 is subjected to the external force F. Therefore, the chromospheres of the force-receiving zone FA are broken, and the dyes coated in these chromospheres are allowed to flow out. The dye will flow into the color grading layer 122 and perform a dyeing operation on the color grading layer 122. Therefore, the user can clearly recognize the position at which the battery device 1 is subjected to the external force F. Among them, the user can design the pressure threshold value of the chromosphere damaged by the external force according to the use requirement. The rest are the same and will not be repeated here.

3 is a perspective view of a battery device according to another embodiment of the present invention. 3A is a schematic cross-sectional view showing a battery device according to another embodiment of the present invention. Please refer to FIG. 3 and FIG. 3A. The battery device 1a of the present embodiment is described by a mobile power source. The battery device 1a includes a first housing S1 (or upper housing), a second housing S2 (or lower housing), a battery core 10, a pressure sensing portion 12b, and a battery management unit 16. The pressure sensing portion 12b is illustrated by a piezoelectric film sensor, a piezoresistive strain sensor or a pressure sensing film. Therefore, the piezoelectric film sensor, the piezoresistive strain sensor or the pressure sensing film outputs a voltage dividing signal of different voltage magnitudes to the battery management unit 16 according to the external force received by the housing 14.

In practice, the first housing S1 and the second housing S2 will form a housing 14 having an accommodation space. The battery cell 10, the pressure sensing portion 12b, and the battery management unit 16 are disposed in the accommodating space formed by the first casing S1 and the second casing S2. Therefore, when the housing 14 is subjected to an external force, an external force is transmitted to the pressure sensing portion 12b, and the pressure sensing portion 12b generates a voltage dividing signal to the battery management unit 16. The pressure sensing unit 12b can also record the pressure sensing position (and the force receiving area), that is, the partial pressure signal includes information such as the force position.

Next, the battery management unit 16 is used to manage the charge and discharge operation of the battery cell 10. The battery management unit 16 is realized, for example, by a printed circuit board (PCB) or PCBA (Printed Circuit Board + Assembly). The battery management unit 16 determines whether the external force is greater than the pressure threshold based on the voltage division signal. When the external force is greater than the pressure threshold, the battery management unit 16 will cut off the circuit connecting the battery cells 10, causing the battery cells 10 of the battery device 1 to stop supplying power to the external devices; or causing the commercial power or external devices to stop supplying power to the battery device 1. Battery core 10. This embodiment does not limit the aspect of the battery management unit 16.

4 is a functional block diagram of a battery core, a pressure sensing portion, and a battery management unit according to another embodiment of the present invention. Please refer to Figure 4. The pressure sensing portion 12b is, for example, a pressure sensing film and has a pressure sensing resistor R1. Pressure sensing film electrical connection Pool management unit 16. Wherein, the value of the pressure sensing resistor R1 has different impedance values according to the magnitude of the external force.

In addition, the battery management unit 16 includes a voltage dividing resistor R2, a voltage source PS, a processing unit 160, a switching unit 164, and a protection unit 162. In practice, the pressure sensing resistor R1 is connected in series with the voltage source PS and the voltage dividing resistor R2 to form a voltage dividing circuit. The processing unit 160 is electrically connected to the switch unit 164, the protection unit 162, the pressure sensing resistor R1, and the voltage dividing resistor R2.

The switch unit 164 includes a discharge switch SW1 and a charging switch SW2. The discharge switch SW1 and the charge switch SW2 are respectively realized by, for example, a changeover switch, a field effect transistor, a bipolar transistor, or other semiconductor switching elements. In addition, the protection unit 162 is, for example, a fuse, an overcharge protection circuit, or an overcurrent protection circuit. This embodiment does not limit the aspects of the switching unit 164 and the protection unit 162.

In addition, a first end FS is electrically connected to the protection unit 162. A second end SS is electrically connected to the switch unit 164. The first end FS and the second end SS are a positive terminal and a negative terminal, respectively. In practice, the first end FS and the second end SS are used, for example, to be coupled to an external device or a commercial connection or electrical interface.

For example, when the battery device 1 is subjected to an external force, the pressure sensing film correspondingly generates a pressure sensing resistor R1 according to the magnitude of the external force. Therefore, the pressure sensing resistor R1 and the voltage dividing resistor R2 will correspondingly generate a voltage dividing signal and transmit it to the processing unit 160. When the processing unit 160 determines that the external force is greater than the pressure threshold, the processing unit 160 may turn off one or a combination of the discharge switch SW1 and the charging switch SW2, for example, the discharge switch SW1 or the charging switch SW2 is in an off state; or the processing unit 160 may also activate protection unit 162, such as a blow fuse. Therefore, the charge and discharge circuit electrically connected to the battery cell 10 will be in an open circuit, thereby protecting the battery cell 10 and the external device.

It is to be noted that in other embodiments, the battery management unit 16 further includes a recording unit (not shown) and a timing unit (not shown) electrically connected to the processing unit 160. The timing unit is configured to provide a time parameter to the processing unit 160. Processing unit When the switch unit 164 is turned off, the recording unit records the occurrence time or the force condition of the first state or the second state. In practice, the recording unit is implemented, for example, by flash memory, storage memory or other memory. The timing unit is implemented, for example, by a timer or an oscillator. This embodiment does not limit the aspect of the recording unit and the timing unit.

FIG. 5 is a schematic diagram of waveforms of external force-pressure sensing resistors of various pressure sensing portions according to another embodiment of the present invention. FIG. 6 is a schematic diagram showing the waveform of force-divided pressure of a plurality of voltage dividing resistors by a pressure sensing portion according to another embodiment of the present invention. Please refer to Figure 5 and Figure 6. Figure 5 is a waveform of the force-pressure sensing resistor of the pressure sensing film. Wherein, the X axis is represented as an external force, and the Y axis is represented as a pressure sensing resistance value. As can be seen from the figure, the larger the external force, the smaller the pressure sensing resistance value of the pressure sensing film. On the contrary, the smaller the external force, the larger the pressure sensing resistance value of the pressure sensing film.

It should be noted that the matching relationship between the pressure sensing resistor R1 of the pressure sensing portion 12 and the voltage dividing resistor R2 of the battery management unit 16 in FIG. 4 will affect the waveform of the force-divided voltage as shown in FIG. 6. For example, when the external force-divided curve waveform is closer to a flat horizontal line, the user must use a higher precision processing unit or MCU to identify the voltage division signal. Conversely, when the slope of the external force-divided curve waveform is larger, the user can use a general processing unit or MCU to recognize the voltage division signal. Briefly, the external force-divided curve waveform will affect the selection of processing unit 160 or MCU as in FIG.

When the user selects the pressure sensing film, the pressure sensing resistance of the pressure sensing film is fixed as the external force changes. Therefore, how to select a voltage dividing resistor that matches the pressure sensing resistor, so that "the external processing force can be accurately determined by using a general processing unit or an MCU" and the above-mentioned recording battery device 1 collides or time or protects the battery device 1, etc. Features.

Next, FIG. 6 includes five external force-divided curves. Wherein, the X axis is represented as an external force, and the Y axis is represented as a partial pressure (ie, the partial pressure signal DS in FIG. 4). The pressure sensing unit 12 is a fixed-type pressure sensing film. And a, b, c, d, and e The equal curves represent the voltage divider resistors of 100K, 47K, 30K, 10K and 3K ohms, respectively. That is to say, in this embodiment, the parameter of the fixed voltage dividing resistor is used to cause the pressure sensing resistance value to change according to the magnitude of the external force.

For example, when the voltage dividing resistor is 100K ohms, the pressure sensing resistance value changes according to the magnitude of the external force as a curve. For example, when the voltage dividing resistor is 47K ohms, the pressure sensing resistance value changes according to the magnitude of the external force such as the c curve. Similarly, curves such as b, c, d, and e are known. Of course, each of these five curves can be used as a basis for the processing unit to judge the magnitude of the external force. In this embodiment, the voltage dividing resistor is selected in the following manner to achieve the protection function of “using a low-cost, low-order processing unit to achieve the same processing unit with high cost, high bit, and high precision”.

Among them, the three curves a, b, and c are respectively "the partial pressure curve of the external force of 200 gram or less is steep, and the partial pressure curve of the external force of 200 gram or more is gentle". Therefore, it is necessary to increase the accuracy of the processing unit to determine the partial pressure of the external force of 200 gram or more. In addition, the two curves of d and e are respectively curves of "the partial pressure curve of the external force of 0 to 1000 gram shows a slope rise". Therefore, a general processing unit can be used to determine the partial pressure of an external force of 0 to 1000 gram or more.

In detail, the selection principle of the processing unit and the voltage dividing resistor is as follows: First, the principle of the processing unit is selected. In practice, a pressure-sensing film external force-pressure sensing resistance curve table is obtained to calculate the maximum and minimum intervals of the external force. For example, when the voltage dividing resistor R2 in FIG. 4 is selected to be 100K ohms, the voltage source PS is, for example, 2.5V. The processing unit 160 is, for example, a 10-bit processor having 1024 points, whereby the detection voltage of each point of the processing unit 160 is 2.441 mV. For example, the pressure sensing resistor R1 at an external force of 20 grams is 30K ohms. The pressure sensing resistor R1 at an external force of 1000 grams is about 1K ohm. Therefore, the maximum and minimum values of the partial pressure are calculated, which are 24.75 mV and 576.92 mV, respectively. Therefore, the discrimination level of the processing unit 160 at which the detection voltage of each point is 2.441 mV is very obvious.

Next, the principle of the voltage dividing resistor is selected, for example, the slope (m) = ΔY / ΔX. For example, as shown in Table 1, the pressure sensing film is first classified into external force intervals, such as interval one.

Interval 2, Interval 3, Interval 4, and Interval 5 are 0 to 200 grams, 200 to 400 grams, 400 to 600 grams, 600 to 800 grams, and 800 to 1000 grams, respectively. Among them, these intervals are relatively large with a slope of 3K, 10K, and 100k ohms, as shown in Table 1.

Step one, first classify the pressure sensing film external force interval, and compare the slope of each interval to obtain a relatively large slope voltage dividing resistance, as shown in Table 1.

Step 2: After obtaining a voltage divider resistor with a relatively large slope, the slope of the flat region is calculated, thereby obtaining a curve of the voltage divider resistance of the maximum slope. For example, 200 to 1000 The gram is used to obtain the maximum slope of the voltage divider resistor, 10k ohm, as shown in Table 2.

Step 3: Intersect the options of steps 1 and 2 to find the best voltage divider resistance. Therefore, when the 10K ohm is used as the voltage dividing resistor in this embodiment, the general processing unit or the MCU can achieve a good relationship between the voltage dividing signal and the pressure threshold, and reduce the cost of the processing unit or the MCU. In addition, in other embodiments, the user may also select a 10K ohm voltage dividing resistor that has a high frequency in these external force intervals. Of course, those skilled in the art can select a processing unit, a pressure sensing film, and a voltage dividing resistor according to the technical spirit of the embodiment.

FIG. 7 is a schematic diagram of a pressure sensing unit and a battery management unit according to another embodiment of the present invention. Please refer to Figure 7. The structure of the pressure sensing portions 12c, 12 in FIG. 7 and FIG. 2 is similar in structure. The difference between the pressure sensing portions 12c, 12 is that the pressure sensing portion 12c has a first surface and a second surface opposite to the first surface. The first surface includes a first substrate layer B1, a color forming layer 120, a color grading layer 122, and a second substrate layer B2. The second side is a pressure sensing film R1.

In practice, the color forming layer 120 connects the first substrate layer B1 and the color layer 122. The color grading layer 122 connects the color forming layer 120 and the second substrate layer B2. The first substrate layer B1 is adjacent to the housing 14. The second substrate layer B2 is adjacent to the pressure sensing film R1. The pressure sensing film R1 has a pressure sensing resistor R1, and the pressure sensing film R1 is electrically connected to a battery management unit 16.

That is, the pressure sensing portion 12c of the present embodiment is presented in two different ways. The current state of pressure sensing. One of the ways is a dye that flows out of the broken chromosphere to flow into the color grading layer 122 and perform a coloring operation on the color grading layer 122. Another way is to generate a voltage dividing signal to the battery management unit 16 by the pressure sensing film R1, thereby causing the battery management unit 16 to control the battery cell 10 to stop charging and discharging, or to cut off the charging and discharging circuit connecting the battery cells 10. Briefly, the user can determine whether the battery device 1 is subjected to an external force collision from the appearance of the battery device 1 or from the charge and discharge function of the battery device 1. Among them, the external force is greater than the pressure threshold.

It is worth mentioning that in other embodiments, the pressure sensing portion has a first face and a second face opposite the first face. The first side includes a color forming layer 120, a color grading layer 122, and a base layer BL, as shown in FIG. 2A. The second side is a pressure sensing film R1. The color layer 122 is connected to the color forming layer 120 and the base layer BL. The color forming layer 120 is adjacent to the housing 14. The base layer BL is adjacent to the pressure sensing film R1. The pressure sensing film R1 has a pressure sensing resistor R1, and the pressure sensing film R1 is electrically connected to a battery management unit 16. The rest are the same and will not be repeated here.

FIG. 8 is a flowchart of a method for detecting an external force of a battery device according to another embodiment of the present invention. Please refer to Figure 8. A method for detecting an external force of a battery device is applicable to a battery device. The battery device includes a battery core and a housing. The housing is used to cover or cover the battery core. The external force detection method includes the following steps:

In step S801, a pressure sensing portion is disposed between a battery core and a casing. Then, in step S803, when the housing is subjected to an external force collision, the housing transmits an external force to the pressure sensing portion, and the pressure sensing portion receives the external force.

In step S805, it is determined whether the external force is greater than a pressure threshold. If the result of the determination in step S805 is YES, the process proceeds to step S807, and the pressure sensing unit in a first state is converted into a second state that can be recorded, and the second state is different from the first state. On the other hand, if the decision result in the step S805 is NO, the process proceeds to a step S809, and the first state is maintained.

In practice, the first state and the second state are respectively a first chemical phenomenon and a second chemical phenomenon, and the first chemical phenomenon means that the pressure sensing portion is a supersaturated solution film, and the second chemical phenomenon refers to a local portion. Or all of the supersaturated solution film is in contact with the seed crystal, and is completely crystallized by liquefaction, solidification and condensation; or the first state and the second state are respectively a first physical phenomenon and a second physical phenomenon, and the first physical phenomenon is The pressure sensing portion has a first color, and the second physical phenomenon means that the pressure sensing portion having the first color further includes a second color; or the first state means that the pressure sensing portion outputs less than the pressure threshold value The one-way pressure signal is given to a battery management unit, and the second state means that the pressure sensing unit outputs a voltage dividing signal greater than the pressure threshold value to the battery management unit.

That is to say, the external force detecting method can exhibit a position, an occurrence time, or other information that the battery device is damaged by an external force through a physical appearance, a chemical appearance, or an electronic signal. In addition, if the battery device is subjected to two or more collisions, falls, or heavy blows, the battery device can still record the second state of two or more collisions, falls, or heavy blows. For example, the recording unit records the location, time of occurrence, magnitude of external force, or other information of a plurality of battery devices being hit, dropped, or hit. This embodiment does not limit the step flow of the external force detecting method.

It can be seen that the problem solved by the present invention is that the effective life cycle of the battery device can effectively present the location, extent, extent, and history of damage or collision of the battery device. Once the battery device is hit, if it damages the circuit layout or related parts (IC, capacitor, etc.) in the battery device, or damages the battery core itself, it may cause the battery device to fail or even cause danger. Therefore, if the abnormality can be detected actively through the pressure sensing unit and the active protection mechanism is activated, the analyst can be effectively given a more detailed analysis basis.

In summary, the battery device of the present invention transmits the external force received by the battery device through the pressure sensing portion. Wherein, the pressure sensing part is a color spheroid including a plurality of broken thresholds that reach the pressure threshold; or a supersaturated solution film that reaches the pressure threshold value, that is, completely crystallized by liquefaction, solidification and condensation; or the pressure sensing electricity changes according to the magnitude of the external force. Resistance pressure sensing film. Therefore, when the external force is greater than the pressure threshold, the battery device transmits the pressure sensing portion to present a difference in appearance or the damaged position; or the battery device transmits the voltage dividing signal to the processing unit through the pressure sensing portion, so that the processing unit is turned off. Or cut off the charge and discharge circuit connecting the battery cells. As a result, the battery device of the present invention does improve the safety of the battery device, and records the situation in which the battery device is hit, impacted, or dropped from a high position to cause malfunction, damage, or malfunction.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

1‧‧‧ battery device

10‧‧‧ battery core

12‧‧‧ Pressure Sensing Department

14‧‧‧Shell

Claims (16)

A battery device includes a battery core and a casing for covering or covering the battery cell, the battery device comprising: a pressure sensing portion disposed between a battery core and a casing; The pressure sensing portion includes at least one of a pressure sensing resistor, a color change sensitized film, and a supersaturated solution film; wherein, when the housing is subjected to an external force, the pressure sensing portion receives the external force, and the The external force is greater than a pressure threshold, and the pressure sensing portion in a first state transitions to a second state, the second state being different from the first state to identify that the battery device is subjected to the external force collision. The battery device of claim 1, wherein the pressure sensing portion is a pressure sensing film and has a pressure sensing resistor electrically connected to a battery management unit, the battery management unit comprising a voltage dividing resistor, a voltage source, a processing unit, a switching unit and a protection unit, the pressure sensing film is connected in series with the voltage source and the voltage dividing resistor, and the processing unit is electrically connected to the switching unit and the protection unit The pressure sensing film and the voltage dividing resistor. The battery device of claim 2, wherein the voltage source, the pressure sensing film and the voltage dividing resistor are formed as a voltage dividing circuit, and the voltage dividing circuit is configured to provide a voltage dividing signal to the processing unit. The processing unit determines whether the external force is greater than the pressure threshold based on the voltage dividing signal. The battery device of claim 3, wherein the protection unit is electrically connected to the battery cell and a first end, the switch unit is electrically connected to the battery cell and a second end, and the external force is determined by the processing unit When the pressure threshold is greater than the threshold value, the processing unit controls the switch unit to be in an off state, or controls the protection unit to be in a protection state. The battery device of claim 3, wherein the battery management unit further comprises a recording unit and a timing unit, respectively electrically connected to the processing unit, wherein the timing unit is configured to provide a time parameter to the processing unit when the processing Unit cut off the switch In the case of the unit, the recording unit records the occurrence time or the force condition of the first state or the second state. The battery device of claim 1, wherein the pressure sensing portion comprises a first substrate layer, a color forming layer, a color grading layer and a second substrate layer, the color forming layer connecting the first substrate layer And the color grading layer, the color grading layer is connected to the color forming layer and the second substrate layer, the first substrate layer is adjacent to the housing, and the second substrate layer is adjacent to the battery core. The battery device of claim 6, wherein the color forming layer comprises a plurality of color spheres attached to the first substrate layer, and the external force acts on the housing to cause attachment to the first Some of the chromospheres of the base layer are crushed by an external force, so that the dye coated in some of the chromosphere flows to the color grading layer, and the color grading layer is a paper or cloth. The battery device of claim 1, wherein the pressure sensing portion comprises a color forming layer, a color grading layer and a base layer, the color grading layer connecting the color forming layer and the base layer, the color forming A layer is adjacent to the housing, the substrate layer being adjacent to the battery core. The battery device of claim 8, wherein the color forming layer comprises a plurality of color spheres attached to the color grading layer, and the external force acts on the housing to cause attachment to the color Some of the chromospheres of the color layer are crushed by an external force, so that the dye coated in some of the chromosphere flows to the color grading layer, which is a paper or cloth. The battery device of claim 1, wherein the first state and the second state are a first chemical phenomenon and a second chemical phenomenon, respectively, and the first chemical phenomenon means that the pressure sensing portion is a supersaturation. The solution film, the second chemical phenomenon refers to a phenomenon in which part or all of the supersaturated solution film is in contact with the seed crystal, and is completely crystallized by liquefaction, solidification and condensation. The battery device of claim 1, wherein the pressure sensing portion has a first surface and a second surface opposite to the first surface, the first surface comprising a first substrate a layer, a color forming layer, a color grading layer, and a second substrate layer, the color forming layer connecting the first substrate layer and the color grading layer, the color grading layer connecting the color forming layer and the second layer a base layer, the first substrate layer is adjacent to the housing, the second substrate layer is adjacent to the battery core, and the second surface is a pressure sensing film and has a pressure sensing resistor, the pressure feeling The test film is electrically connected to a battery management unit. The battery device of claim 1, wherein the pressure sensing portion has a first surface and a second surface opposite to the first surface, the first surface comprising a color forming layer, a color grading layer, and a a base layer, the color grading layer connecting the color forming layer and the base layer, the color forming layer being adjacent to the casing, the base layer being adjacent to the battery core, and the second surface being a pressure sensing film And having a pressure sensing resistor electrically connected to a battery management unit. A method for detecting an external force of a battery device is applicable to a battery device. The battery device has a battery core and a casing for covering or covering the battery cell. The external force detecting method includes: setting a request item 1 The pressure sensing portion of one of 12 is between a battery core and a casing, wherein the pressure sensing portion comprises at least one of a pressure sensing resistor, a color change sensible film, and a supersaturated solution film; When the housing is subjected to an external force, the pressure sensing portion receives the external force, and the external force is greater than a pressure threshold value, and the pressure sensing portion in a first state is converted into a second state, the second state Different from the first state, it is recognized that the battery device is subjected to the external force collision. The external force detecting method of the battery device according to claim 13, wherein the first state and the second state are respectively a first chemical phenomenon and a second chemical phenomenon, and the first chemical phenomenon refers to the pressure sensing The portion is a supersaturated solution film, and the second chemical phenomenon refers to a phenomenon in which a part or all of the supersaturated solution film is in contact with the seed crystal, and is completely crystallized by liquefaction, solidification and condensation. The external force detecting method of the battery device according to claim 13, wherein the first The state and the second state are respectively a first physical phenomenon and a second physical phenomenon, and the first physical phenomenon means that the pressure sensing portion has a first color, and the second physical phenomenon refers to having the first physical state The pressure sensing portion of one color further includes a second color. The external force detecting method of the battery device according to claim 13, wherein the first state means that the pressure sensing unit outputs a voltage dividing signal smaller than the pressure threshold value to a battery management unit, and the second state means The pressure sensing unit outputs the voltage dividing signal greater than the pressure threshold to the battery management unit.