CN210744093U - Battery bulge detection sensing device and battery pack - Google Patents
Battery bulge detection sensing device and battery pack Download PDFInfo
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- CN210744093U CN210744093U CN201922086210.8U CN201922086210U CN210744093U CN 210744093 U CN210744093 U CN 210744093U CN 201922086210 U CN201922086210 U CN 201922086210U CN 210744093 U CN210744093 U CN 210744093U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a battery swell detects sensing device and battery pack, wherein, battery swell detects sensing device includes: the sensor, the laminating sets up the surface at the battery: the feedback component is connected with the sensor and used for detecting the state of the sensor; the sensor comprises a first elastic sheet and a second elastic sheet which are arranged at intervals, at least one elastic sheet in the first elastic sheet and the second elastic sheet is fixed on the storage battery, and the storage battery extrudes the sensor to enable the first elastic sheet to be in contact with the second elastic sheet when the storage battery bulges. The utility model provides a battery swell detects sensing device can guarantee the safe in utilization of battery, guarantees simultaneously that the user can in time discover the inside potential safety hazard of battery, and the structural style of first shell fragment and second shell fragment is simple for sensor overall structure is simple, simple process, and is with low costs, and the manufacturing and later stage of being convenient for are promoted.
Description
Technical Field
The utility model relates to a battery technology field particularly, relates to a battery swell detects sensing device and a battery pack.
Background
The storage battery is very widely applied, along with the development of the technology, the application field is continuously expanded, the market space is larger and larger, the deformation and the protrusion of the storage battery in the use process can influence the service life of the storage battery, and the storage battery is caused to leak, break, explode and burn under severe conditions, and even safety accidents such as explosion, fire and the like are caused. Therefore, the bulge phenomenon of the storage battery needs to be detected in time, and the manual inspection mode mainly adopted at present cannot realize real-time online monitoring, so that the early fine bulge phenomenon is difficult to find.
In order to solve the above technical problem, the utility model patent application with application number "201510503476.1" discloses a battery swell detection sensor, including the sensor main part of pasting on the battery surface, be located the connector of sensor one end, insert the terminal in this connector, connect the PCB board of this terminal and connect the communication module of this PCB board. The battery bulge detection sensor in the above patent technology has the following disadvantages:
1) utilize the sensor to hug closely the battery body and detect battery pack swell, when being detected the battery and having the swell phenomenon to take place, hug closely and receive the pressure effect at the sensor main part that is detected the battery surface, and export the signal of telecommunication to the board through terminal and connector, the PCB board sends wireless communication module and wired communication module after handling the signal of telecommunication, wireless communication module and wired communication module are outside to send the signal, signal receiver receives the back, just can detect out the swell phenomenon of battery, above-mentioned implementation means is with high costs, the circuit is complicated, and what gather is the pressure signal of sensor, need complicated circuit to handle the signal of sensor output, be unfavorable for promoting.
2) The output circuit of traditional battery does not have protection switch, when the battery swell abnormal conditions takes place, can't in time cut off the output, easily causes battery and consumer to damage.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least improving one of the technical problems existing in the prior art.
Therefore, the utility model discloses the first aspect provides a battery swell detects sensing device.
The utility model discloses the second aspect provides a battery pack.
The utility model discloses the first aspect provides a battery swell detects sensing device, include: the sensor, the laminating sets up the surface at the battery: the feedback component is connected with the sensor and used for detecting the state of the sensor; the sensor comprises a first elastic sheet and a second elastic sheet which are arranged at intervals, at least one elastic sheet in the first elastic sheet and the second elastic sheet is fixed on the storage battery, and the storage battery extrudes the sensor to enable the first elastic sheet to be in contact with the second elastic sheet when the storage battery bulges.
The utility model provides a battery swell detects sensing device includes sensor and feedback assembly. The sensor is attached to the surface of the storage battery and comprises a first elastic sheet and a second elastic sheet which are arranged at intervals, and at least one of the first elastic sheet and the second elastic sheet is ensured to be fixed on the surface of the storage battery; the feedback component is connected with the sensor and can detect the state of the sensor. Under the condition that no bulge exists in the storage battery, the first elastic sheet and the second elastic sheet are arranged at intervals, and the sensor is in a disconnected state; under the inside condition that appears the swell of battery, the shell fragment that can receive the battery with battery fixed connection, and then contacts with another shell fragment, and the sensor is in the closure state this moment. That is, the bulge condition inside the battery can directly change the open or closed state of the sensor, and the feedback component connected with the sensor can detect the open or closed state of the sensor to judge whether the bulge condition occurs inside the battery.
The utility model provides a battery swell detects sensing device can be used to detect whether the swell condition appears in the battery inside, guarantees the safe in utilization of battery, guarantees simultaneously that the user can in time discover the inside potential safety hazard of battery. In addition, the structural style of first shell fragment and second shell fragment is simple for sensor overall structure is simple, simple process, and is with low costs, is convenient for manufacturing and later stage popularization. In addition, can adjust the shape of first shell fragment and second shell fragment according to the form of battery to install first shell fragment and second shell fragment in different positions, in order to satisfy the battery of multiple form, be favorable to battery swell to detect sensing device's popularization.
According to the utility model discloses above-mentioned technical scheme's battery swell detects sensing device can also have following additional technical characteristics:
in the technical scheme, one side of the sensor, which is close to the storage battery, is subjected to insulation treatment.
In the technical scheme, one side of the sensor close to the storage battery is subjected to insulation treatment, one side of the sensor close to the storage battery is insulated, the short circuit condition inside the storage battery can be effectively avoided, and the use safety of the storage battery is ensured.
In any of the above technical solutions, the first elastic piece and the second elastic piece are metal elastic pieces, and the feedback assembly includes a resistor and a voltage detection device; one of the first elastic sheet and the second elastic sheet is connected with one end of the storage battery, the other elastic sheet is connected with the resistor, the other end of the resistor is connected with the other end of the storage battery, and the voltage detection device is used for detecting the voltage at the two ends of the resistor; or one of the first elastic sheet and the second elastic sheet is connected with a resistor, the other end of the resistor is connected with one end of the storage battery, the other elastic sheet is connected with the other end of the storage battery, and the voltage detection device is used for detecting the voltage at the two ends of the resistor.
In the technical scheme, the first elastic sheet and the second elastic sheet are both metal elastic sheets, and the metal elastic sheets have enough elasticity and conductivity, so that the contact and the separation of the first elastic sheet and the second elastic sheet can be ensured, and the current can be ensured to pass through. The feedback assembly comprises a resistor and a voltage detection device, the resistor can play a role in voltage division, and the voltage detection device can detect the voltages on two sides of the resistor to judge the on-off condition of the sensor and further judge whether the bulge condition occurs inside the storage battery.
Specifically, the sensor is arranged between the positive electrode and the negative electrode of the storage battery, the resistor can be arranged between the sensor and the positive electrode of the storage battery, and the resistor can also be arranged between the sensor and the negative electrode of the storage battery; the voltage detection device detects voltages on two sides of the resistor to judge the on-off condition of the sensor, and further judge whether the bulge condition occurs inside the storage battery.
In any of the above technical solutions, the feedback component includes a triode and a field effect transistor; the first end of the triode is connected with one of the first elastic sheet and the second elastic sheet, the other of the first elastic sheet and the second elastic sheet is connected with the positive electrode of the storage battery, the second end of the triode is connected with the negative electrode of the storage battery, the third end of the triode is connected with the first end of the field-effect tube, the third end of the triode and the first end of the field-effect tube are connected with the positive electrode of the storage battery, the second end of the field-effect tube is connected with the negative electrode of the storage battery, the third end of the field-effect tube is negatively connected with an external output electrode, and a connecting circuit of the third end of the triode, the first end of the field-effect tube and the positive electrode of the storage battery and a connecting circuit of the first; if the first elastic sheet and the second elastic sheet are disconnected, the second end of the triode and the third end of the triode are in a disconnected state, so that the second end and the third end of the field-effect tube are in a connected state, and the negative electrode of the storage battery is negatively communicated with the external output electrode; the first elastic sheet and the second elastic sheet are in contact closure, the second end of the triode and the third end of the triode are in a conducting state, the second end and the third end of the field effect tube are in a disconnecting state, and the negative electrode of the storage battery is in negative disconnection with the external output electrode.
In the technical scheme, the feedback assembly comprises a triode and a field effect transistor. The first end of the triode is connected with one end of the sensor, namely the first end of the triode is connected with one of the first elastic sheet and the second elastic sheet; the other end of the sensor is connected with the anode of the storage battery, namely, the other elastic sheet of the first elastic sheet and the second elastic sheet is connected with the anode of the storage battery; the second end of the triode is connected with the negative electrode of the storage battery, the third end of the triode is connected with the first end of the field effect tube, and the third end of the triode and the first end of the field effect tube are both connected with the positive electrode of the storage battery; the second end of the field effect tube is connected with the negative electrode of the storage battery; the third end of the field effect transistor is negatively connected with the external output electrode; in addition, a resistor is arranged on a connecting circuit of the third end of the triode and the first end of the field effect transistor and the anode of the storage battery, and a resistor is arranged on a connecting circuit of the first end of the triode and the anode of the storage battery through the sensor.
When the sensor is in an off state, namely the first elastic sheet and the second elastic sheet are disconnected, the second end of the triode and the third end of the triode are in an off state, at the moment, the second end and the third end of the field effect transistor are in an on state, the negative electrode of the storage battery is in negative communication with the external output electrode, and the storage battery supplies power to the outside; when the sensor is in a closed state, namely the first elastic sheet is in contact with the second elastic sheet, the second end of the triode and the third end of the triode are in a conducting state, the second end and the third end of the field effect transistor are in a disconnecting state, at the moment, the negative electrode of the storage battery is disconnected with the external output electrode, and the storage battery stops supplying power to the outside.
That is, through the cooperation of triode and field effect transistor, can guarantee to be outside power supply under the battery normal operating condition, stop to be outside power supply under the bulge condition appears in the battery inside, guaranteed the normal work of battery on the one hand, on the other hand guarantees can in time detect the inside bulge condition of battery to in time break power output when the bulge condition appears, guarantee the safe in utilization of battery, and guarantee that the user in time learns the potential safety hazard that the battery exists.
In any of the above technical solutions, the number of the sensors is multiple, the sensors are connected in parallel, and a first resistor is connected in series on a branch where each sensor is located; the storage battery bulge detection sensing device further comprises a second resistor, and the second resistor is connected between the triode and the sensor in series.
In this technical scheme, be provided with a plurality of sensors, and then can detect whether the bulging condition appears in the battery inside in a plurality of positions, guarantee the inside all-round detection of battery. In addition, a first resistor is connected in series on a branch where each sensor is located, and the plurality of first resistors are connected in parallel and then are integrally connected in series with a second resistor. The number of the closed sensors is related to the bulge condition of the storage battery, the more serious the bulge condition of the storage battery is, the more the number of the closed sensors is, the more the number of the parallel first resistors is, the smaller the overall resistance of the parallel first resistors connected into the circuit is, the voltage of the parallel first resistors is divided by the overall second resistors, and the higher the voltage of the second resistors is.
In any of the above technical solutions, the method further includes: and one end of the third resistor is connected to the sensor, the connection point of the third resistor and the sensor is positioned between the sensor and the second resistor, and the other end of the third resistor is connected with the negative electrode of the storage battery.
In the technical scheme, the storage battery bulge detection sensing device further comprises a third resistor. One end of the third resistor is connected between the sensor and the second resistor, and the other end of the third resistor is connected with the negative electrode of the storage battery. The third resistor can play a role of protecting the circuit and share the function of voltage division with the second resistor.
In any of the above technical solutions, the method further includes: and the controller is connected with the second resistor and is configured to detect the voltage of the second resistor.
In the technical scheme, the storage battery bulge detection sensing device further comprises a controller. The controller is used for detecting the voltages of the second resistor and the third resistor, and the severity of the bulge condition of the storage battery can be judged according to the voltage obtained by dividing the voltages of the second resistor and the third resistor. Specifically, the higher the voltage across the second resistor and the third resistor, the more severe the swelling condition inside the battery.
That is, the technical scheme that this application was injectd not only can cut off current output when the bulge appears in the battery inside, still can detect the severity of the inside bulge of battery, realizes the dual effect of detection and protection.
A second aspect of the present invention provides a battery assembly, which includes a housing; the battery cell is arranged in the shell; the electrode is arranged in the shell and is connected with the battery cell; and if the utility model discloses any in the first aspect battery swell detects sensing device, and battery swell detects sensing device and sets up in the casing.
The utility model discloses battery pack of second aspect, reach battery swell detection sensing device as above-mentioned arbitrary technical scheme including casing, electric core, electrode. The battery core and the electrode are arranged in the shell, so that the battery core and the electrode are prevented from being exposed on the outer surface, and a certain protection effect is achieved; the battery bulge detection sensing device is arranged in the shell, the sensor is attached to the surface of the battery core, and one of the first elastic piece and the second elastic piece is fixed on the battery core.
In the use process of the battery pack, once the battery core bulges, the battery core can force the first elastic sheet to contact with the second elastic sheet, the feedback assembly detects the state change of the sensor at the moment, the electric quantity output of the battery pack is cut off, and the use safety of the battery pack is ensured.
According to the utility model discloses above-mentioned technical scheme's battery pack can also have following additional technical characterstic:
in the above technical solution, the method further comprises: the protection plate is arranged in the shell and located between the electrode and the battery cell, and the field effect tube is arranged on the protection plate.
In the technical scheme, a protection plate is arranged in the shell, the electrodes and the battery cell are arranged at two ends of the protection plate, and the field effect tube is arranged on the protection plate. Through the setting of protection shield, can play certain guard action to battery pack to extension battery pack's life, and guarantee battery pack's safety in utilization. Specifically, the protection board can play the functions of over-discharge protection, over-charge protection, short-circuit protection and over-current protection.
In any of the above technical solutions, the battery module is a lithium battery.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a block diagram of a battery bulge detection sensor device according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a battery bulge detection sensor apparatus according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a battery bulge detection sensor apparatus according to yet another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a battery assembly according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:
the sensor 102, the feedback assembly 104, the 1042 triode, the 1044 fet, the 106 first resistor, the 108 second resistor, the 110 third resistor, the 112 fourth resistor, and the 114 external output electrode are negative, the 116 controller, the 118 first elastic sheet, the 120 second elastic sheet, the 202 shell, the 204 electric core, the 206 electrode, and the 208 protection plate.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The first embodiment is as follows:
as shown in fig. 1 and 4, a first embodiment of the present invention provides a battery bulge detection sensing device, which includes a sensor 102 and a feedback assembly 104.
As shown in fig. 4, the sensor 102 is attached to the surface of the battery, and the sensor 102 includes a first elastic piece 118 and a second elastic piece 120 that are arranged at intervals, and at least one of the first elastic piece 118 and the second elastic piece 120 is ensured to be fixed to the surface of the battery; the feedback component 104 is coupled to the sensor 102 and is configured to detect a status of the sensor 102.
Under the condition that no bulge exists in the storage battery, the first elastic sheet 118 and the second elastic sheet 120 are arranged at intervals, and the sensor 102 is in a disconnected state; when the bulge occurs in the battery, the elastic sheet fixedly connected with the battery is pressed by the battery and then contacts with another elastic sheet, and the sensor 102 is in a closed state. That is, the bulge inside the battery directly changes the open or closed state of the sensor 102, and the feedback component 104 connected to the sensor 102 can detect the open or closed state of the sensor 102 to determine whether the bulge occurs inside the battery.
The battery bulge that this embodiment provided detects sensing device can be used to detect whether the bulge condition appears in the battery inside, guarantees the safe in utilization of battery, guarantees simultaneously that the user can in time discover the inside potential safety hazard of battery. In addition, the first elastic sheet 118 and the second elastic sheet 120 are simple in structural form, so that the sensor 102 is simple in overall structure, simple in process, low in cost, and convenient to process, manufacture and popularize in later periods. In addition, the shapes of the first elastic sheet 118 and the second elastic sheet 120 can be adjusted according to the shape of the storage battery, and the first elastic sheet 118 and the second elastic sheet 120 are installed at different positions, so that the storage battery with various shapes is met, and the popularization of the storage battery bulge detection sensing device is facilitated.
In addition, one side of the sensor 102 close to the storage battery is subjected to insulation treatment, so that the short circuit condition in the storage battery is effectively avoided, and the use safety of the storage battery is ensured.
Example two:
the utility model discloses a second embodiment provides a battery bulge detection sensing device, which comprises a sensor and a feedback component; the feedback assembly includes a resistor and a voltage sensing device (not shown).
Wherein, resistance can play the effect of partial pressure, and voltage detection device accessible detects the voltage of resistance both sides to judge the break-make condition of sensor, and then judge whether the swelling condition appears in the battery inside. In addition, the sensor is arranged between the positive electrode and the negative electrode of the storage battery, the resistor can be arranged between the sensor and the positive electrode of the storage battery, and the resistor can also be arranged between the sensor and the negative electrode of the storage battery; the voltage detection device detects voltages on two sides of the resistor to judge the on-off condition of the sensor, and further judge whether the bulge condition occurs inside the storage battery.
Specifically, one of the first elastic sheet and the second elastic sheet is connected with one end of the storage battery, the other elastic sheet is connected with the resistor, the other end of the resistor is connected with the other end of the storage battery, and the voltage detection device is used for detecting the voltage at the two ends of the resistor. That is, the resistor is provided between the sensor and the positive electrode of the battery.
Specifically, one of the first elastic sheet and the second elastic sheet is connected with a resistor, the other end of the resistor is connected with one end of the storage battery, and the other elastic sheet is connected with the other end of the storage battery. That is, the resistor is disposed between the sensor and the negative electrode of the battery.
Example three:
as shown in fig. 2 and 4, a third embodiment of the present invention provides a battery bulge detection sensing apparatus, which includes a sensor 102 and a feedback assembly 104; the feedback assembly 104 includes a transistor 1042 and a fet 1044.
As shown in fig. 2, a first end of the transistor 1042 is connected to one end of the sensor 102, that is, the first end of the transistor 1042 is connected to one of the first elastic piece 118 and the second elastic piece 120; the other end of the sensor 102 is connected to the positive electrode of the battery, that is, the other of the first elastic piece 118 and the second elastic piece 120 is connected to the positive electrode of the battery; the second end of the triode 1042 is connected with the negative electrode of the storage battery, the third end of the triode 1042 is connected with the first end of the field-effect tube 1044, and the third end of the triode 1042 and the first end of the field-effect tube 1044 are both connected with the positive electrode of the storage battery; the second end of the field effect tube 1044 is connected with the cathode of the storage battery; the third terminal of the fet 1044 is connected to the external output electrode negative 114.
In addition, a resistor is arranged on a circuit connecting the third end of the triode 1042 and the first end of the field effect transistor 1044 with the positive electrode of the storage battery, and a resistor is arranged on a circuit connecting the first end of the triode 1042 with the positive electrode of the storage battery through the sensor 102. Specifically, a fourth resistor 112 is disposed on a circuit connecting the third end of the triode 1042 and the first end of the field-effect transistor 1044 with the positive electrode of the storage battery, and a second resistor 108 is disposed on a circuit connecting the first end of the triode 1042 with the positive electrode of the storage battery through the sensor 102.
When the sensor 102 is in an off state, that is, when the first elastic piece 118 and the second elastic piece 120 are disconnected, the second end of the triode 1042 and the third end of the triode 1042 are in an off state, at this time, the second end and the third end of the field effect transistor 1044 are in an on state, the negative electrode of the storage battery is communicated with the external output electrode negative 114, and the storage battery supplies power to the outside; when the sensor 102 is in a closed state, that is, when the first elastic piece 118 contacts the second elastic piece 120, the second terminal of the triode 1042 is in a conducting state with the third terminal of the triode 1042, and the second terminal and the third terminal of the field effect transistor 1044 are in a disconnecting state, at this time, the negative electrode of the storage battery is disconnected from the external output electrode negative 114, and the storage battery stops supplying power to the outside.
That is, through the cooperation of triode 1042 and field effect transistor 1044, can guarantee to be outside power supply under the battery normal operating condition, stop to be outside power supply under the bulge condition appears in the battery inside, guaranteed the normal work of battery on the one hand, on the other hand guarantees to detect the inside bulge condition of battery in time to in time break power output when the bulge condition appears, guarantee the safe in utilization of battery, and guarantee that the user in time learns the potential safety hazard that the battery exists.
Example four:
as shown in fig. 3 and 4, a fourth embodiment of the present invention provides a battery bulge detection sensing apparatus, which includes a sensor 102 and a feedback assembly 104; the number of the sensors 102 is multiple, the sensors 102 are connected in parallel, and a branch where each sensor 102 is located is connected with a first resistor 106 in series; the storage battery bulge detection sensing device further comprises a second resistor 108, and the second resistor 108 is connected in series between the triode 1042 and the sensor 102;
in this embodiment, a plurality of sensors 102 are provided, so that whether the bulge condition occurs inside the storage battery can be detected at a plurality of positions, and the omnibearing detection of the inside of the storage battery is ensured. In addition, a first resistor 106 is connected in series to a branch where each sensor 102 is located, and a plurality of first resistors 106 are connected in parallel and then are connected in series with a second resistor 108. The number of the closed sensors 102 is related to the bulge condition of the storage battery, and the more serious the bulge condition of the storage battery is, the more the number of the closed sensors 102 is, the more the number of the first resistors 106 connected in parallel is, so that the smaller the overall resistance of the first resistors 106 connected in parallel in the circuit is, the voltage of the first resistors 106 connected in parallel is divided by the second resistors 108, and the higher the voltage of the second resistors 108 is.
In this embodiment, further, as shown in fig. 3, the battery bulge detection sensing device further includes a third resistor 110. One end of the third resistor 110 is connected between the sensor 102 and the second resistor 108, and the other end of the third resistor 110 is connected to the negative electrode of the battery. The third resistor 110 can function as a protection circuit and share the function of voltage division with the second resistor 108; and a fourth resistor 112 is arranged on a connection circuit between the third end of the triode 1042 and the first end of the field-effect tube 1044 and the anode of the storage battery, and plays a role of protecting the circuit.
In this embodiment, further, as shown in fig. 3, the battery bulge detection sensing device further includes a controller 116. The controller 116 is configured to detect voltages of the second resistor 108 and the third resistor 110, that is, determine the severity of the battery bulge according to the voltage difference between the second resistor 108 and the third resistor 110. Specifically, the higher the voltage across the second resistor 108 and the third resistor 110, the more severe the internal bulge of the battery.
That is, the technical scheme that this application was injectd not only can cut off current output when the bulge appears in the battery inside, still can detect the severity of the inside bulge of battery, realizes the dual effect of detection and protection.
In any of the above embodiments, the first elastic piece 118 and the second elastic piece 120 are both metal elastic pieces, and the metal elastic pieces have sufficient elasticity and conductivity, so as to ensure the contact and separation of the first elastic piece 118 and the second elastic piece 120, and ensure the current to pass through.
In any of the above embodiments, the side of the sensor 102 close to the battery is insulated, so that the side of the sensor 102 close to the battery is insulated, thereby effectively avoiding a short circuit condition inside the battery and ensuring the use safety of the battery.
Example five:
as shown in fig. 4, a fifth embodiment of the present invention provides a battery assembly, which includes a housing 202, a battery cell 204, an electrode 206, and a battery bulge detection sensing device according to any of the above technical solutions.
The battery cell 204 and the electrode 206 are both disposed inside the casing 202, and are prevented from being exposed on the outer surface, so as to play a certain role in protection; the battery bulge detection sensing device is disposed in the casing 202, and the sensor 102 is attached to the surface of the battery cell 204, and one of the first elastic piece 118 and the second elastic piece 120 is fixed to the battery cell 204.
In the using process of the battery assembly, once the battery core 204 bulges, the battery core 204 forces the first elastic sheet 118 to contact with the second elastic sheet 120, and at this time, the feedback assembly 104 detects the state change of the sensor 102, so as to cut off the electric quantity output of the battery assembly, thereby ensuring the use safety of the battery assembly.
In this embodiment, further, as shown in fig. 4, a protective plate 208 is provided inside the casing 202, the electrodes 206 and the battery cells 204 are provided at both ends of the protective plate 208, and the field effect tubes 1044 are provided on the protective plate 208. Through the setting of protection shield 208, can play certain guard action to battery pack to prolong battery pack's life, and guarantee battery pack's safety in utilization. Specifically, the protection plate 208 may function as an overdischarge protection, an overcharge protection, a short circuit protection, and an overcurrent protection.
Specifically, the battery assembly is a lithium battery, and is a secondary battery.
The specific embodiment is as follows:
the battery bulge detection sensing device provided by the utility model adopts low-cost metal elastic sheets (namely the first elastic sheet 118 and the second elastic sheet 120); the metal elastic sheet is attached to the surface of the battery cell 204, and the side close to the battery cell 204 is provided with insulation to prevent short circuit of the battery assembly; the metal spring plate is equivalent to a switch with two small pole pieces, one end of the metal spring plate is connected with the anode of the battery pack through a lead, the other end of the metal spring plate is connected with the second resistor 108 through a lead and then connected with the base electrode of the triode 1042, and a plurality of similar pole pieces can be installed according to the area of the battery pack. When the battery pack swells, the switch is closed, the triode 1042 is electrified and passes through, and the collector 206 of the triode 1042 outputs a protection signal to disconnect the output of the battery pack; the bulge degree of the battery pack can be judged by detecting the voltage of the base electrode of the triode 1042.
Specifically, as shown in fig. 4, the battery assembly includes a housing 202, a battery cell 204, an electrode 206, a protective plate 208, a first resilient sheet 118, and a second resilient sheet 120. Normally, the first elastic sheet 118 and the second elastic sheet 120 are not in contact with each other, the battery cell 204 supplies power to the outside through the protection plate 208 and the electrode 206, and when the assembly bulges, the first elastic sheet 118 and the second elastic sheet 120 are pressed by the pressure generated by the bulge of the battery cell 204 and are in contact with each other.
The first elastic piece 118 and the second elastic piece 120 are equivalent to elastic piece switches (i.e., the sensor 102) in the circuit of fig. 3, when the two metal elastic pieces are pressed together, the elastic piece switches are equivalent to be closed, the positive electrode of the battery passes through the first resistor 106 and the elastic piece switches, and then is divided by the second resistor 108 and the third resistor 110 to drive the triode 1042, the triode 1042 is turned on to generate a turn-off signal to cut off the output of the battery pack, and the protected controller 116 can judge the bulge condition of the battery cell 204 by collecting the voltage between the second resistor 108 and the third resistor 110. In addition, an analog-to-digital converter is arranged in the controller 116 and is connected to the circuit through the analog-to-digital converter; a serial port is also provided in the controller 116 to connect to an external device.
The utility model provides a battery bulge detects sensing device detects the bulge of lithium cell and realizes the circuit shutoff through simple metal shrapnel, resistance and triode 1042, simple process, with low costs; the scheme is flexible to install, can be designed into metal elastic pieces with different shapes according to different battery pack forms, is installed at different positions, and is easy to popularize.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A battery bulge detection sensing device, comprising:
the sensor, the laminating setting is in the surface of battery:
the feedback component is connected with the sensor and used for detecting the state of the sensor;
the sensor comprises a first elastic sheet and a second elastic sheet which are arranged at intervals, at least one of the first elastic sheet and the second elastic sheet is fixed on the storage battery, and the storage battery extrudes the sensor to enable the first elastic sheet to be in contact with the second elastic sheet when the storage battery bulges.
2. The battery bulge detection sensor apparatus of claim 1, wherein a side of the sensor adjacent to the battery is insulated.
3. The battery bulge detection sensing device according to claim 1, wherein the first spring plate and the second spring plate are metal spring plates, and the feedback assembly comprises a resistor and a voltage detection device;
one of the first elastic sheet and the second elastic sheet is connected with one end of the storage battery, the other elastic sheet is connected with a resistor, the other end of the resistor is connected with the other end of the storage battery, and the voltage detection device is used for detecting voltages at two ends of the resistor; or, one of the first elastic sheet and the second elastic sheet is connected with the resistor, the other end of the resistor is connected with one end of the storage battery, the other elastic sheet is connected with the other end of the storage battery, and the voltage detection device is used for detecting the voltage at the two ends of the resistor.
4. The battery bulge detection sensing device according to claim 1,
the feedback assembly comprises a triode and a field effect transistor;
the first end of the triode is connected with one of the first elastic sheet and the second elastic sheet, the other of the first elastic sheet and the second elastic sheet is connected with the positive electrode of the storage battery, the second end of the triode is connected with the negative electrode of the storage battery, the third end of the triode is connected with the first end of the field-effect tube, the third end of the triode and the first end of the field-effect tube are connected with the positive electrode of the storage battery, the second end of the field-effect tube is connected with the negative electrode of the storage battery, the third end of the field-effect tube is negatively connected with an external output electrode, and resistors are arranged on a connecting circuit of the third end of the triode, the first end of the field-effect tube and the positive electrode of the storage battery and a connecting circuit of the first end of the triode and the positive electrode of the storage battery through a sensor;
if the first elastic sheet and the second elastic sheet are disconnected, the second end of the triode and the third end of the triode are in a disconnected state, so that the second end and the third end of the field effect transistor are in a connected state, and the negative electrode of the storage battery is in negative communication with an external output electrode; the first elastic sheet and the second elastic sheet are closed in a contact mode, the second end of the triode and the third end of the triode are in a conducting state, the second end and the third end of the field effect tube are in a disconnecting state, and the negative electrode of the storage battery is negatively disconnected with the external output electrode.
5. The battery bulge detection sensing device according to claim 4,
the number of the sensors is multiple, the sensors are connected in parallel, and a branch where each sensor is located is connected with a first resistor in series;
the storage battery bulge detection sensing device further comprises a second resistor, and the second resistor is connected in series between the triode and the sensor.
6. The battery bulge detection sensing device according to claim 5, further comprising:
one end of the third resistor is connected to the sensor, a connection point of the third resistor and the sensor is located between the sensor and the second resistor, and the other end of the third resistor is connected with the negative electrode of the storage battery.
7. The battery bulge detection sensing device according to claim 6, further comprising:
a controller connected to a circuit between the second resistance, the third resistance, and the sensor, the controller configured to detect a voltage of the second resistance and the third resistance.
8. A battery assembly, comprising:
a housing;
the battery cell is arranged in the shell;
the electrode is arranged in the shell and is connected with the battery cell; and
the battery bulge detection sensing device of any one of claims 1 to 7, disposed within the housing.
9. The battery assembly of claim 8, further comprising:
the protection plate is arranged in the shell and located between the electrode and the battery cell, and the field effect tube is arranged on the protection plate.
10. The battery pack according to claim 8 or 9, wherein the battery pack is a lithium battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922086210.8U CN210744093U (en) | 2019-11-28 | 2019-11-28 | Battery bulge detection sensing device and battery pack |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378331A (en) * | 2020-11-09 | 2021-02-19 | 维沃移动通信有限公司 | Electronic device, battery deformation detection method, and readable storage medium |
| CN114122549A (en) * | 2021-11-26 | 2022-03-01 | 歌尔科技有限公司 | Battery bulge detection method and device and computer readable storage medium |
| WO2023184689A1 (en) * | 2022-03-30 | 2023-10-05 | 歌尔股份有限公司 | Battery swelling detection apparatus, method and system, and electronic device |
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2019
- 2019-11-28 CN CN201922086210.8U patent/CN210744093U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378331A (en) * | 2020-11-09 | 2021-02-19 | 维沃移动通信有限公司 | Electronic device, battery deformation detection method, and readable storage medium |
| CN112378331B (en) * | 2020-11-09 | 2022-01-28 | 维沃移动通信有限公司 | Electronic device, battery deformation detection method, and readable storage medium |
| CN114122549A (en) * | 2021-11-26 | 2022-03-01 | 歌尔科技有限公司 | Battery bulge detection method and device and computer readable storage medium |
| WO2023184689A1 (en) * | 2022-03-30 | 2023-10-05 | 歌尔股份有限公司 | Battery swelling detection apparatus, method and system, and electronic device |
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